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Publication numberCN101310198 A
Publication typeApplication
Application numberCN 200680042385
PCT numberPCT/US2006/043733
Publication date19 Nov 2008
Filing date10 Nov 2006
Priority date18 Nov 2005
Also published asCN101310198B, US7777832, US20070115407, WO2007061645A1
Publication number200680042385.1, CN 101310198 A, CN 101310198A, CN 200680042385, CN-A-101310198, CN101310198 A, CN101310198A, CN200680042385, CN200680042385.1, PCT/2006/43733, PCT/US/2006/043733, PCT/US/2006/43733, PCT/US/6/043733, PCT/US/6/43733, PCT/US2006/043733, PCT/US2006/43733, PCT/US2006043733, PCT/US200643733, PCT/US6/043733, PCT/US6/43733, PCT/US6043733, PCT/US643733
Inventors克林顿ˇLˇ琼斯, 詹姆斯ˇTˇ理查德
Applicant3M创新有限公司
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Multi-function enhancement film
CN 101310198 A
Abstract
A light management unit is described for attachment to a display module, especially suited for an LCD TV or LCD monitor. The light management unit includes a directionally recycling layer including a structured side and a planar side where the structured side includes prism structures. The light management unit also includes a reflective polarizer positioned on the planar side of the directionally recycling layer. The light management unit also includes a diffusion structure incorporated into either the directionally recycling layer or between the directional recycling layer and the reflective polarizer. The diffusion structure causes a level of diffusion that is sufficient to prevent the appearance of colored bands when a viewer positioned along a line of sight that is perpendicular to the direction of the prism structures views the light management unit, illuminated from below, at an oblique angle from a vertical axis.
Claims(22)  translated from Chinese
1.一种附连在显示器模块上的光控制单元,其包括: a)定向回收利用层,其包括结构化侧和平面侧,其中所述结构化侧包括棱柱结构; b)反射偏振片,其适用于透射具有第一偏振取向的光并且反射具有与之不同的偏振取向的光,其中所述反射偏振片设置在所述定向回收利用层的所述平面侧上; c)漫射结构,其复合在所述定向回收利用层内、或在所述定向回收利用层与所述反射偏振片之间的界面内,其中所述漫射结构使穿过该漫射结构的光发生漫射, (i)其中由所述漫射结构引起的漫射足以防止当观察者处于垂直于所述棱柱结构的视线方向、以与竖直轴成斜角的方式观察所述光控制单元时看到色带。 A display module attached to the optical control unit, which comprises: a) directional recycling layer including a structured side and a planar side, wherein the structured side includes prism structures; b) a reflective polarizer, adapted to transmit light having a first polarization orientation and reflecting light having a different polarization orientation thereto, wherein the reflective polarizer is disposed on the directional recycling layer side of said plane; c) diffusing structure, Compound recovered its orientation in the use of the inner layer, or the use of directional recycling layer and the interface between the reflective polarizer, wherein the light passing through the diffusing structure allows diffusion structure diffuses, (i) wherein the diffusion caused by the diffusion structure is sufficient to prevent the line of sight when the observer is in a direction perpendicular to the prism structure to an oblique angle with the vertical axis of the light observation mode to see the color control unit band.
2. 根据权利要求1所述的单元,其中所述棱柱结构具有90度的角度。 2. The unit according to claim 1, wherein said prismatic structure having an angle of 90 degrees.
3. 根据权利要求1所述的单元,其中所述漫射结构包括在所述定向回收利用层的所述结构化侧上的粗糙表面。 3. The unit according to claim 1, wherein said diffusion structure comprises a roughened surface in the orientation of the structure of the recovery-side layer on.
4. 根据权利要求1所述的单元,其中所述定向回收利用层包括: 包括所述平面侧的棱柱基底层;和包括所述结构化侧的棱柱结构层;所述漫射结构包括遍布所述棱柱结构层内部的光漫射特征。 4. The unit according to claim 1, wherein the directional recycling layer includes: a base layer comprising prismatic side of said plane; and a prismatic structure layer including the structured side; the diffuse throughout the structure comprises said prismatic structure of the light-diffusing characteristics inside the layer.
5. 根据权利要求4所述的单元,其中所述光漫射特征选自由折射率与形成所述棱柱结构的树脂不同的小珠、微气隙和光散射颗粒组成的群组。 5. The unit according to claim 4, wherein the light diffusing characteristic is selected from the refractive index of the resin forming the prism structures different beads, micro-gap and the group consisting of light scattering particles.
6. 根据权利要求1所述的单元,其中所述定向回收利用层包括: 包括所述平面侧的棱柱基底层;和包括所述结构化侧的棱柱结构层;所述漫射结构包括遍布所述棱柱基底层内部的光漫射特征。 6. The unit according to claim 1, wherein the directional recycling layer includes: a base layer comprising prismatic side of said plane; and a prismatic structure layer including the structured side; the diffuse throughout the structure comprises said prism light diffusion characteristics of the substrate layer inside.
7. 根据权利要求6所述的单元,其中所述光漫射特征选自由折射率与形成所述棱柱基底的树脂不同的小珠、微气隙和光散射颗粒组成的群组。 7. The unit according to claim 6, wherein the light diffusing characteristic selected from the prism with a refractive index different from the base resin beads are formed, the micro-gap and the group consisting of light scattering particles.
8. 根据权利要求1所述的单元,其中所述定向回收利用层包括:包括所述平面侧的棱柱基底层;和包括所述结构化侧的棱柱结构层;所述漫射结构包括:所述棱柱基底层与所述棱柱结构层之间的折射率差;和在所述棱柱基底层上的邻近所述棱柱结构层的粗糙表面。 8. The unit according to claim 1, wherein the directional recycling layer includes: a base layer comprising prismatic side of said plane; and a prismatic structure layer including the structured side; the diffusion structure comprises: the said prism refractive index of the base layer and the difference between the prism structure layer; and a rough surface adjacent the prism structure of the prism layer on the substrate layer.
9. 根据权利要求1所述的单元,其中所述定向回收利用层包括:包括所述平面侧的棱柱基底层;和包括所述结构化侧的棱柱结构层;所述光控制单元还包括在所述棱柱基底层与所述反射偏振片之间的粘结剂层,所述漫射结构包括:所述棱柱基底层与所述粘结剂层之间的折射率差;和所述棱柱基底层的邻近所述粘结剂层一侧上的粗糙表面。 9. The unit according to claim 1, wherein the directional recycling layer includes: a prism substrate layer that includes the planar side; and a prismatic structure layer including the structured side; said light control means further comprises The prism base layer and adhesive layer between the reflective polarizer, the diffusing structure comprising: a refractive index of the prism substrate layer and the adhesive layer between the difference; and the prism base the bottom of the rough surface on the side adjacent to the adhesive layer.
10. 根据权利要求1所述的单元,还包括:(a)在所述定向回收利用层与所述反射偏振片之间的粘结剂层,其中所述漫射结构包括所述粘结剂层中的光散射颗粒。 10. The unit according to claim 1, further comprising: (a) between the directional recycling layer and the reflective polarizer adhesive layer, wherein said binder comprises the diffusing structure layers of light scattering particles.
11. 根据权利要求1所述的单元,其中所述漫射结构包括:(a)具有漫射特征的反射偏振片表层,其设置在所述定向回收利用层与所述反射偏振片之间。 11. The unit according to claim 1, wherein said diffusion structure comprises: (a) having a surface diffusion characteristics of the reflective polarizer, which is disposed between the directional recycling layer and the reflective polarizer use.
12. —种显示系统,其包括:a) 背光源;b) 液晶显示(LCD)面板,其包括上板和下板、以及设置在所述上板和下板之间的液晶层;禾口c) 光控制单元,其设置在所述背光源与所述液晶显示面板之间, 其中所述光控制单元包括-(i) 定向回收利用层,其包括结构化侧和平面侧,其中所述结构化侧包括棱柱结构;(ii) 反射偏振片,适用于透射具有第一偏振取向的光并且反射具有与之不同的偏振取向的光,所述反射偏振片设置在所述定向回收利用层的所述平面侧上;(iii) 漫射结构,其复合在所述定向回收利用层内、或在所述定向回收利用层与所述反射偏振片之间的界面内,其中由所述漫射结构引起的漫射足以防止当观察者处于平行于所述棱柱结构的方向、以与竖直轴成斜角的方式观察所述光控制单元时看到色带。 12. - kind of display system comprising: a) a backlight; b) liquid crystal display (LCD) panel, which includes upper and lower plates, and between the upper and lower plates of the liquid crystal layer is disposed; Hekou c) the light control means, disposed in the display backlight and the liquid crystal panel between, wherein the light control unit includes - (i) recycling the orientation layer, which comprises a structured side and a planar side, wherein the structured side comprises a prismatic structure; (ii) a reflective polarizer for transmission having a first polarization orientation and reflecting light having a different polarization orientation with the light, the reflective polarizing film disposed on the directional recycling layer The upper planar side; (iii) diffusing structure, in which the orientation of the composite layer of recycled or directed at the inner boundary layer and recycling between the reflective polarizer, wherein the diffusion by the sufficient to prevent diffusion structure caused when the observer is in parallel to the prismatic structure of direction, with the vertical axis of the way to look at an oblique angle to the light control unit to see the ribbon.
13. 根据权利要求12所述的系统,其中所述棱柱结构具有约90度的角度。 13. The system according to claim 12, wherein the prism structure having an angle of about 90 degrees.
14. 根据权利要求12所述的系统,其中所述漫射结构包括所述定向回收利用层的所述结构化侧上的粗糙表面。 14. The system according to claim 12, wherein said diffusion structure comprises recovering said directional rough surface structure of the layer on the utilization side.
15. 根据权利要求12所述的系统,其中所述定向回收利用层包括: 包括所述平面侧的棱柱基底层;和包括所述结构化侧的棱柱结构层;所述漫射结构包括遍布所述棱柱结构层内部的光漫射特征。 15. The system according to claim 12, wherein the directional recycling layer includes: a base layer comprising prismatic side of said plane; and a prismatic structure layer including the structured side; the diffuse throughout the structure comprises said prismatic structure of the light-diffusing characteristics inside the layer.
16. 根据权利要求15所述的系统,其中所述光漫射特征选自由折射率与形成所述棱柱结构的树脂不同的小珠、微气隙以及光散射颗粒组成的群组。 16. The system of claim 15, wherein the light diffusing characteristic is selected from the refractive index of the resin forming the prism structures of the different beads, micro-gap and the group consisting of light scattering particles.
17. 根据权利要求12所述的系统,其中所述定向回收利用层包括: 包括所述平面侧的棱柱基底层;和包括所述结构化侧的棱柱结构层;所述漫射结构包括遍布所述棱柱基底层内部的光漫射特征。 17. The system according to claim 12, wherein the directional recycling layer includes: a base layer comprising prismatic side of said plane; and a prismatic structure layer including the structured side; the diffuse throughout the structure comprises said prism light diffusion characteristics of the substrate layer inside.
18. 根据权利要求17所述的系统,其中所述光漫射特征选自由折射率与形成所述棱柱基底的树脂不同的小珠、微气隙以及光散射颗粒组成的群组。 18. The system of claim 17, wherein the light diffusing characteristic is selected from the refractive index of the prism substrate formed of a different resin beads, micro-gap and the group consisting of light scattering particles.
19. 根据权利要求12所述的系统,其中所述定向回收利用层包括: 包括所述平面侧的棱柱基底层;和包括所述结构化侧的棱柱结构层; 所述漫射结构包括:所述棱柱基底层与所述棱柱结构层之间的折射率差;和所述棱柱基底层上的邻近所述棱柱结构层的粗糙表面。 19. A system according to claim 12, wherein said directional recycling layer comprising: a prism base layer side of said plane; and a prismatic structure layer including the structured side; the diffusion structure comprises: the said prism refractive index of the base layer and the difference between the prism structure layer; and a layer adjacent to the prismatic structure of the prism base layer on the rough surface.
20. 根据权利要求12所述的系统,其中所述定向回收利用层包括: 包括所述平面侧的棱柱基底层;和包括所述结构化侧的棱柱结构层;所述光控制单元还包括在所述棱柱基底层与所述反射偏振片之间的粘结剂层,所述漫射结构包括:所述棱柱基底层与所述粘结剂层之间的折射率差;和所述棱柱基底层的与所述棱柱结构层相对的一侧上的粗糙表面。 20. A system according to claim 12, wherein said directional recycling layer comprising: a base layer of said prism plane side; and a prismatic structure layer including the structured side; said light control means further comprises The prism base layer and adhesive layer between the reflective polarizer, the diffusing structure comprising: a refractive index of the prism substrate layer and the adhesive layer between the difference; and the prism base prismatic structure underlying the relatively rough surface layer on the side.
21. 根据权利要求12所述的系统,其还包括:(a)在所述定向回收利用层与所述反射偏振片之间的粘结剂层,其中所述漫射结构包括所述粘结剂层中的光散射颗粒。 21. A system according to claim 12, further comprising: (a) between the directional recycling layer and the reflective polarizing layer of adhesive, wherein said structure comprises a diffusion bond layer of light scattering particles.
22. 根据权利要求12所述的系统,其中所述漫射结构包括-(a)具有漫射特征的反射偏振片表层,其设置在所述反射偏振片与所述棱柱层之间。 22. The system according to claim 12, wherein said diffusion structure comprises - (a) having a surface diffusion characteristics of the reflective polarizer, disposed between the reflective polarizer and the prism layer.
Description  translated from Chinese

多功能增强薄膜背景技术本发明整体涉及一种光学组件。 Multifunctional enhancement film BACKGROUND The present invention generally relates to an optical assembly. 更具体地讲,本发明涉及用于显示系统的薄膜组件。 More specifically, the present invention relates to a membrane module for the display system. 一些光学显示系统包括一种薄膜,该薄膜被设计成通过偏转离轴光并回收利用轴上光,使其最终作为轴上光从显示器中射出,以此增加所在光学显示系统的轴向亮度值。 Some optical display system comprising a film which is designed to deflect off-axis light and by recycling light axis, light emitted from a final display as a shaft, thereby increasing the luminance value where the axial direction of the optical display system . 例如,可得自3M Company (St. Paul, Minnesota)的3M品牌BRIGHTNESS ENHANCEMENT FILM (BEF),是一类可用于增强光学显示系统的光学薄膜。 For example, available from 3M Company (St. Paul, Minnesota) The 3M brand BRIGHTNESS ENHANCEMENT FILM (BEF), a class can be used to enhance the optical display optical film system. BEF及类似薄膜通常包括位于一个表面上的棱柱阵列,与光的波长相比所述棱柱较大。 BEF films and the like generally comprises a prism array on the surface, as compared with the wavelength of light larger prism. 这些结构体增加了导向观察者的光的量。 These structures increase the amount of light guide the viewer. 应用时,这些薄膜通常以一个或两个维度上的离轴照明为代价来增加轴上照明。 When applied, these films are typically used to increase the illumination axis to off-axis illumination of one or two dimensions expense. 以此方式,所述材料能够有助于显示器设计者在减少能量消耗的情况下获得所需的轴上照明量。 In this way, the material can help the display designer to obtain the desired amount of illumination axis in the case of reducing the energy consumption. 具有结构化表面的BEF和其它类似薄膜的各种实施例在例如下列文献中有所描述:美国专利No. 5, 394, 255 (Yokota等人);5,552,907 (Yokota等人);6,052,164(Cobb, Jr.等人);6,091,547 (Gardiner等人);以及6, 111, 696(Allen等人)。 Various BEF and other similar films having a structured surface embodiment has, for example, described in the following documents: US Patent No. 5, 394, 255 (Yokota et al.); 5,552,907 (Yokota et al.); 6,052,164 (Cobb, Jr. et al.); 6,091,547 (Gardiner et al.); and 6, 111, 696 (Allen et al.). 采用此类具有棱柱结构化表面的薄膜,通过优选地包括回收利用光的反射和折射过程,可以达到增强亮度的目的。 The use of such a thin film having a structured surface prism, reflected by preferably comprises recycling process and refraction of light, you can achieve the purpose of enhancing the luminance. 当用于优选的背光源构造时,具有棱柱结构化表面的薄膜有助于将光导向观察者(通常位于显示系统的正前方),否则光会以大角度离开屏幕而无法射向观察者。 When used in a preferred configuration of a backlight, a thin film having a structured surface of the prism light guide helps the viewer (usually located in front of the display system), otherwise the light will leave the screen at a large angle can not be directed to the viewer. 对显示器的亮度、均匀性和总体性能的改进正在不断地探寻之中,并且在液晶显示器中经常采用增亮薄膜和棱柱结构。 Brightness, uniformity and improved overall performance of the display is constantly exploring into, and are often used in liquid crystal displays and the prismatic brightness enhancement film structure. 液晶显示器(LCD)是在诸如膝上型计算机、手持计算器、电子表和电视机之类的装置中使用的光学显示器。 Liquid Crystal Display (LCD) is such as laptop computers, hand-held calculators, digital watches and televisions and the like used in optical display devices. 一些液晶显示器包括位于显示器侧面的光源和光导装置,后者将光从光源处导向液晶显示面板的背面。 Some of the liquid crystal display includes a light source and a light guide device is located on the side of the display, which will light guide from the light source of a liquid crystal display on the back panel. 其它液晶显示器,例如一些液晶监视器和液晶电视(LCD-TV),均使用设置在液晶显示面板背面的若干光源直接照射。 Other liquid crystal displays, such as some LCD monitors and LCD TV (LCD-TV), are using several light sources direct exposure settings are displayed on the back of the LCD panel. 这种布置方式在较大的显示器中日益普遍,这是因为为了获得特定程度的显示亮度,光能的需求随显示器尺寸的平方而增加,而显示器侧面用于设置光源的可用区域仅随显示器的尺寸呈线性增加。 This arrangement in general increasingly larger displays, because in order to obtain a certain level of display brightness, energy demand increases with the square of the display size, and the area available for the light source of the display side of the display only with size increases linearly. 另外, 一些液晶显示器应用,诸如液晶电视,要求显示内容足够亮,以便能在与其它应用相比距离更远处被看到,并且对液晶电视视角的需求一般不同于对液晶监视器和手持装置的需求。 In addition, some of the liquid crystal display applications, such as LCD TV, requires the display bright enough to be able to use compared to other more distant to be seen in the distance, and the demand for LCD TVs are generally different from the perspective of LCD monitors and hand-held devices It needs. 一些液晶监视器和大多数液晶电视一般用若干冷阴极荧光灯(CCFL) 从背面照射。 Some LCD monitors and most LCD TVs generally use a number of cold cathode fluorescent lamp (CCFL) is irradiated from the back. 这些光源大多数为线性的,并且通常在显示器的一个维度上全程延伸,呈平行阵列或沿边缘排列。 Most of these sources are linear and generally extends the entire display in one dimension, was arranged in a parallel array or along the edge. 发明内容本发明提供附连到显示器模块上的光控制单元。 The present invention provides an optical control unit attached to the display module. 该光控制单元包括定向回收利用层(directionally recycling layer),所述回收利用层具有结构化侧和平面侧。 The control unit includes a directional light recycling layer (directionally recycling layer), the recycling of the structured layer side and a flat side. 结构化侧包括棱柱结构。 Structured side comprises prismatic structure. 光控制单元还包括反射偏振片,其适用于透射具有第一偏振取向的光并且反射具有与之不同的偏振取向的光。 Light control unit further comprises a reflective polarizer adapted to transmit light having a first polarization orientation and reflecting light having a different polarization with orientation. 反射偏振片设置在所述定向回收利用层的平面侧上。 Reflective polarizer is provided on the flat side of the directional recycling layer. 漫射结构复合在定向回收利用层中,或者在定向回收利用层与反射偏振片之间的界面内。 Diffuse structural composite directional recycling layer or the orientation layer and recycling the use of the interface between the reflective polarizer. 漫射结构使穿过该漫射结构的光发生漫射。 Diffusing structure passing through the diffusion structure diffuses light. 当观察者位于沿垂直于棱柱结构的视线方向、以与竖直轴成斜角的方式观察该薄膜结构时,由漫射结构引起的漫射足以防止看到色带。 When the observer is located in a direction perpendicular to the line of sight of the prism structures, with the vertical axis at an oblique angle of approach when viewing the film structure, diffusion caused by the diffusion structure is sufficient to prevent the ribbon saw. 本发明还描述了显示器装置,其包括背光源、液晶显示面板以及上述段落中所描述的光控制单元。 The present invention also describes a display device comprising a backlight, a liquid crystal display panel and a light control unit as described in the preceding paragraphs. 在一个实施例中,棱柱结构具有90度的角度。 In one embodiment, the prism structures have an angle of 90 degrees. 复合在光控制单元内的漫射结构在不同实施例中有多种不同形式。 Diffuse light composite structures within the control unit has a variety of different forms in different embodiments. 例如,在一个实施例中,该漫射结构包括位于定向回收利用层的结构化侧上的粗糙表面。 For example, in one embodiment, the diffusion structure comprises a roughened surface oriented recovery structured use layer on the side. 在另一个实施例中,该光控制单元还包括在定向回收利用层与反射偏振片之间的粘结剂层,并且漫射结构包括粘结剂层中的光散射颗粒。 In another embodiment, the light control unit further comprising recovering the use of an adhesive layer between the polarizer and the reflective layer in orientation, and an adhesive layer diffusion structure includes light scattering particles. 定向回收利用层通常包括棱柱基底层和包括棱柱结构的棱柱结构层。 Recycling oriented layer typically prismatic structure layer prismatic structure comprises prism base layer and included. 漫射结构的另一个实例是遍布棱柱结构层或棱柱基底层内部的光漫射特征。 Another example of the diffuser structure is prismatic structure layer over the base layer or prismatic interior light diffusion characteristics. 该光漫射特征选自由折射率与形成棱柱结构的树脂不同的小珠、微气隙以及光散射颗粒组成的群组。 This feature is selected from the refractive index of light diffusion and prism structures forming the resin beads of different micro-gap and the group consisting of light scattering particles.

在另一个实施例中,漫射结构包括棱柱基底层与棱柱结构层之间的折射率差,以及棱柱基底层上的邻近棱柱结构层的粗糙表面。 Embodiment, the diffusion structure comprises a substrate layer with a refractive index prism difference between the prismatic structure layer, and a rough surface adjacent prismatic prism structure layer on the base layer of another embodiment.

漫射结构的另一个实例是棱柱基底层与粘结剂层之间的折射率差,以及棱柱基底层的邻近粘结剂层的一侧上的粗糙表面。 Another example of the diffusion structure is a prism base layer and the refractive index difference between the adhesive layer and the base layer of the roughened surface side of the prism adjacent the adhesive layer on.

在另一个实施例中,漫射结构包括反射偏振片表层,其带有设置在定向回收利用层与反射偏振片之间的漫射特征。 In another embodiment, the diffusion structure comprises a reflective polarizer surface, with its characteristic diffusion layer disposed between the reflective polarizer and the orientation of recycling.

下面,通过结合附图描述本发明的多种具体实施方式,可以更全面地了解本发明。 Now, in conjunction with the accompanying drawings of the present invention more embodiments, can more fully understand the present invention.

附图说明 Brief Description

图1示出具有光控制单元和防眩光偏振片的液晶电视结构的分解示意图。 Figure 1 shows an exploded view of the structure of the LCD TV polarizer issued by bright light and glare control unit.

图2示出可包含在本发明的光控制单元中的定向回收利用层。 Figure 2 shows the light control unit may be included in the present invention is directed recycled layer.

图3示出根据本发明的光控制单元的剖视图。 Figure 3 shows a cross-sectional view of an optical control unit of the present invention.

图4示出为测量光控制单元射出的光的强度而设置的实验锥光镜的侧面示意图。 Figure 4 shows a side to control the intensity of the measuring light emitted from the light unit and set up experiments conoscope Fig.

图5为从不包括漫射元件的光控制单元射出的光的锥光图。 Figure 5 is a never include a light diffusing element of the control unit of the cone of light emitted from the light of FIG. 图6-7示出从光源射出的光的多种光路,这些光路包括不同次数的表面相互作用。 Figure 6-7 shows a variety of light emitted from the light path of the light, these optical paths include surface interaction of different times.

图8-14为根据本发明的各种光控制单元的示意性剖视图,其中在光控制结构中包括某些类型的漫射结构。 Figure 8-14 is a schematic cross-sectional view of various optical control unit according to the present invention, including certain types of light-diffusing structure control structure.

本发明可以通过多种方式进行修改,细节已在图中以实例的方式示出,并将做详细描述。 The present invention may be modified in various ways, it has been detailed in the figure is shown by way of example, and will be described in detail. 但应明白,本发明不局限于所述的具体实施例。 But it should be understood that the invention is not limited to the specific embodiments described. 相反,其目的在于涵盖所有下列根据权利要求而限定的本发明的精神和范围内的修改形式、等同物以及替代形式。 On the contrary, the intention is to cover modifications within the spirit and scope of the claims and all of the following defined according to the present invention, equivalents, and alternatives.

具体实施方式本发明适用于液晶显示器(LCD或LC显示器),尤其适用于从背面直接照射的液晶显示器,例如,大型计算机监视器和液晶电视(LCD-TV)。 Specific embodiments of the present invention is applicable to a liquid crystal display (LCD or LC displays), especially for direct radiation from the back of the LCD display, for example, large computer monitors and LCD televisions (LCD-TV). 本发明尤其适用于光源呈线性并在显示器的整个宽度上延伸的液晶显示器。 The present invention is particularly suitable light source is linear and extends over the entire width of the display LCD. 本发明也可用于包括侧光式系统在内的其它系统。 The present invention is also applicable to other systems including the edge-lit system, including.

本发明涉及直接照明式液晶显示器装置,所述装置在液晶显示面板和光源之间设置有光控制层结构。 The present invention relates to a direct-lit liquid crystal display device, the liquid crystal display device disposed between the panel and the light source control layer structure. 光控制单元通常通过以多种方式影响透过该单元的光来起到提高显示器性能的作用。 Light control unit typically affect a variety of ways by the light transmitted through the unit to play a role to improve the display performance.

首先描述液晶显示器装置的基本元件,这是因为液晶显示器装置是根据本发明的光控制单元的典型使用环境。 First describe the basic elements of the liquid crystal display device, a liquid crystal display device because it is a typical ambient light control unit according to the present invention. 液晶显示器装置100的示例性实施例的分解示意图在图1中给出。 Decomposition exemplary embodiment of a liquid crystal display device 100 in FIG. 1 a schematic view is given. 这样的显示器装置100可能用于,例如,液晶监视器或液晶电视。 Such a display device 100 may be used, for example, a liquid crystal monitor or an LCD television. 显示器装置100包括液晶面板102,该液晶面板通常包括设置在面板106之间的液晶层104。 Display apparatus 100 includes a liquid crystal panel 102, the liquid crystal panel is generally disposed between the panel 106 includes a liquid crystal layer 104. 上吸收偏振片108设置在液晶层104之上,下吸收偏振片110设置在液晶层104之下。 Upper absorbing polarizer 108 is disposed above the liquid crystal layer 104, lower absorbing polarizer 110 is disposed below the liquid crystal layer 104. 所述上偏振片108和下偏振片110可以包括防眩光涂层。 The upper polarizer 108 and the lower polarizer 110 may include an anti-glare coating.

板106通常由玻璃形成,并且可以包括电极结构和位于内表面上的取向层,用于控制液晶层104中液晶的取向。 Plate 106 is typically formed of glass, and may comprise an alignment layer on the electrode structure and the inner surface, the liquid crystal layer 104 for controlling the orientation of the liquid crystal. 电极结构通常被布置为用于限定液晶像素,即,这样的液晶层区域:其中液晶的取向可被独立控制,而与邻近区域无关。 Electrode structures are commonly arranged for defining LCD pixels, i.e., so that the liquid crystal layer regions: wherein the liquid crystal alignment can be controlled independently, irrespective of the neighboring region. 在一个或多个板106中也可包括用于对所显示的图像着色的滤色器。 In one or more plate 106 may also include a colored image displayed on a color filter.

吸收偏振片108、 110和液晶面板102共同控制从光源区112射向观察者的光在通过显示器时的透射情况。 Absorbing polarizer 108, 110 and 102 of the liquid crystal panel joint control toward the viewer from the light source region 112 at the time of transmission by the display case. 例如可通过控制器114选择性激活液晶层104的不同像素,使得光穿过显示器的某些所需位置,从而形成观察者所看见的图像。 For example, can be selectively activated by controller 114 different pixels of the liquid crystal layer 104, so that some of the desired position of the light passing through the display, thereby forming an image seen by the viewer. 控制器H4可以包括,例如计算机或者接收信息产生电视图像的电视机控制器。 H4 The controller may include, for example, a computer or a television image receiving information generating television controller.

光源区112包括大量光源116,这些光源产生照射液晶面板102的光。 Source region 112 includes a large number of light source 116, the light source produces a light irradiating liquid crystal panel 102. 用于液晶电视或液晶监视器的光源116通常是在显示器装置100中延伸的线性冷阴极荧光(CCFL)管。 Linear light source for LCD TV or LCD monitor 116 typically extends in the display device 100 in cold cathode fluorescent (CCFL) tubes. 可以使用多种类型的光源,诸如白炽灯或弧光灯、发光二极管、平面荧光板、螺线型或U型CCFL管或外部荧光灯。 You can use a variety of types of light sources, such as incandescent or arc lamps, light emitting diodes, flat fluorescent plate, screw linear or U-shaped CCFL tube or external fluorescent lamps. 该光源列表不具有限制性且不详尽,仅作示例用。 The source list is not exhaustive and not restrictive, only as an example with. 光源区112还可包括反射器118,该反射器用于反射从光源116向下传播的光。 Source region 112 can be 118, the reflector for reflecting light from the light source 116 includes a reflector spread downward. 该反射器由此使背离液晶面板102传播的光反向传播并导向液晶面板102。 The reflected light is thereby departing from the liquid crystal panel 102 and guide the propagation of reverse spread the liquid crystal panel 102. 如下文所述,反射器118也可用于回收利用显示器装置内的光。 As described below, the reflector 118 may also be used recycling light within the display device. 反射器118可以是镜面反射器,或者可以是漫反射器。 The reflector 118 may be a specular reflector or may be a diffuse reflector.

显示器100也包括漫射板122。 Display 100 also includes a diffusion plate 122. 漫射板用于漫射接收自光源的光,使得射到液晶面板102上的照明光的均匀性增加。 Diffusing plate for diffusing the received light from the light source, so that the illumination light incident to increase the uniformity of the liquid crystal panel 102. 因此,该漫射板的引入使得观察者感觉看到的图像的亮度更加均匀。 Therefore, the introduction of the diffusion plate so that the luminance image seen by the viewer feel more uniform.

光控制单元120设置在光源区112和液晶面板102之间。 Between the light source region 112 and the liquid crystal panel 102 light control unit 120 is provided. 此单元影响光源区112传播出来的光,以此改善显示器装置100的性能。 This unit spread out to the light source region 112 light, thus improving the performance of the display device 100. 现在, Right now,

将对光控制单元的主元件进行描述。 Will be the main element for the optical control unit will be described.

光控制单元120可包括反射偏振片124。 The control unit 120 may include a light reflective polarizer 124. 光源116通常产生非偏振光,但是下吸收偏振片110只透射一种偏振状态的光。 Light sources 116 typically produce unpolarized light but the lower absorbing polarizer polarization state of a transmissive light 110. 因此,如果没有反射偏振片,那么由光源产生的光的大约一半都不能透射到液晶层104。 Therefore, if there is no reflective polarizer, then about half of the light generated by the light source can not be transmitted to the liquid crystal layer 104. 然而,可以使用反射偏振片124来反射否则会被下吸收偏振片吸收的光,以使得这种光可以通过反射偏振片124和反射器118之间的反射而被重新利用。 However, you can use the reflective polarizer 124 is absorbed by the polarizer reflection or absorption of light, so that light can be reflected between the reflective polarizer 118 and the reflector 124 is reused. 至少一部分由反射偏振片124反射的光会被消偏振,并且随后以可以透射通过反射偏振片124和下吸收偏振片110并到达液晶层104的偏振状态返回到反射偏振片124。 At least a portion of the reflected light reflective polarizer 124 is depolarized, and subsequently can be transmitted through the reflective polarizer 124 and the lower absorbing polarizer 110 and the polarization state of the liquid crystal layer 104 reaches the reflective polarizer 124 is returned to. 反射偏振片与反射器共同作用以便回收利用否则会被吸收偏振片110吸收的偏振光。 Reflective polarizer and a reflector work together for recycling that would otherwise be absorbed by the polarizer 110 absorbed polarized light. 这样,反射偏振片124可用于增加光源116发出的光中到达液晶层104的部分。 Thus, the reflective polarizer 124 may be used to increase the light emitted from the light source 116 reaches the liquid crystal layer 104 in the portion. 由于反射偏振片124的引入,由显示器装置100产生的图像更加明亮。 Since the introduction of the reflective polarizer 124, an image generated by the display device 100 brighter.

光控制单元120也可包括定向回收利用层128。 Light control unit 120 may also include a directional recycling layer 128. 定向回收利用层是包括这样一种表面结构的层,所述表面结构使离轴光转向更靠近显示器轴线的方向。 Recycling oriented layer comprising such a surface structure layer, the surface structure allows off-axis light turning closer to the display axis direction. 这样能增加穿过液晶层104的在轴上传播的光的量,从而增加观察者所看到的图像的亮度。 The amount of light propagation so that the shaft can be increased through the liquid crystal layer 104, thereby increasing the brightness of the image seen by the viewer. 一个实例为棱柱层,它具有通过折射和反射使照明光偏转的许多棱柱形隆起。 One example is a prismatic layer having through refraction and reflection of the illumination light deflected many prismatic ridge. 表面结构的另一个实例是棱锥结构。 Another example of the surface structure is a pyramid structure.

图2示出旨在增加显示器的轴向亮度的层128。 Figure 2 shows an axial aims to increase the brightness of the display layer 128. 层128具有第一表面20和第二表面22。 Layer 128 has a first surface 20 and a second surface 22. 第二表面22包括多个结构体。 The second surface 22 comprises a plurality of structures. 通常这些结构体是三棱柱,诸如棱柱24,但也可以使用其它形状。 These structures are generally triangular prism, such as a prism 24, but other shapes may be used. 棱柱24具有峰26。 Prism 24 has a peak 26. 已有经验表明,如果峰26是尖锐的且形成90°角,则增益(即在具有该薄膜和不具有该薄膜的情况下背光源的轴向亮度之比)会最大,但是出于其 Experience has shown that if the peak is sharp and 26 form a 90 ° angle, the gain (ie, having an axial luminance of the film and the circumstances under which the film does not have a backlight ratio) will be the biggest, but for its

它方面考虑使用者会选择圆角或其它角度。 It is in view of the user may choose rounded or other angles. 棱柱24和邻近的棱柱28之间是峰谷30。 Between the prism 24 and the prism 28 is adjacent valley 30. 同峰26 —样,如果峰谷30是尖锐的且形成90°角,则层128将具有最高的增益,但峰谷30也可以为圆角或形成其它角度。 With the peak 26 - like, if the valley 30 is sharp and forms a 90 ° angle, the layer 128 having the highest gain, but the valley 30 may be rounded or form other angles.

所述棱柱所具有的峰-峰间距被称为层128的节距P。 The prism has a peak - peak spacing layer 128 is called a pitch P. 通常节距应当足够小,使得使用者在观看包括层128的显示器时看不到棱柱,但是不要小到因衍射作用而降低性能的程度。 Typically the pitch should be small enough so that the user can not see when viewing the prism layer 128 including a display, but do little to reduce the extent due to diffraction effect and performance. 商业产品通常具有的节距在约24 um 和50 nm之间。 Commercial products usually have a pitch of about 24 um and 50 nm between.

通常,第一表面20为平滑表面。 Typically, the first surface 20 is a smooth surface. 在此情况下,平滑表面应被理解为表面20上的任何结构与棱柱(诸如层128的侧面22上的棱柱24)的尺寸相比都是微小的。 In this case, a smooth surface should be understood as any structure on the surface of the prism 20 (such as a side surface 128 of the upper layer 22 of the prism 24) is small compared to the size of the. 为了便于隐藏位于层128背面的背光源的任何结构, 一般情况下,表面20是不光滑的表面。 In order to facilitate hide any structure layer 128 located on the back of the backlight, in general, the surface 20 is a smooth surface. 作为另外一种选择,侧面20 可能有其它结构,诸如用来减弱表面20的菲涅耳反射的蛾眼结构。 Alternatively, the sides 20 may have other configurations, such as to reduce Fresnel reflection surface 20 of the ear moth-eye structure.

图2示出四条示例性光线。 Figure 2 illustrates four exemplary light. 第一光线36以掠射角(即,与法线的夹角接近90°)接近表面20。 First light 36 at grazing angles (i.e., the angle between the normal close 90 °) close to the surface 20. 光线36通过表面20时,将朝向层128的法线进行折射。 36 through 20 light surface, the facing layer 128 is refracted normal. 当到达结构化表面22时,它会被再次折射。 When 22:00 arrives structured surface, it will be refracted again. 由于结构化表面22上的结构,它被再次折射后与层128的法线之间的夹角更小。 Due to the structure on the structured surface 22, and the angle between the normal to layer 128 smaller again after it is refracted. 光线38以更靠近层128法线的角度接近平滑表面20。 Ray 38 at an angle closer to the normal line of the layer 128 near the smooth surface 20. 当它穿过表面20 时也被折射,但折射程度较小。 When it is refracted through the surface 20 also, but to a lesser degree of refraction. 当射出表面22时,它再次被折射,使得它位于层128法线的这样一侧:该侧与其第一次入射到表面20上时的入射侧相对。 When fired 22 surface, it is refracted again, so that it's located this side of 128 normal: the side to its first 20 incident on the surface opposite the incident side. 光线40以靠近层128法线的角度或以位于层128法线上的角度接近层128,并通过结构化表面22发生两次全内反射而返向背光源。 40 In light layer 128 near normal angle or the angle layer 128 is located close to the normal line of the layer 128, and through the structured surface 22 occurs in two total internal reflection and return to the backlight. 光线42以与光线38相似的角度接近表面,但其入射位置使其被结构化表面22上的棱柱的一个侧面全内反射,但不被第二侧面全内反射。 Light rays 42 and 38 similar to the angle close to the surface, but its position so that one side is incident on the prism of the structured surface 22 on total internal reflection, but is not totally internally reflected by the second side. 结果,它相对于层128的法线以大角度射出。 As a result, it is relative to the normal of layer 128 at a large angle shot. 由于此类反射只发生于沿相对于入射侧面成较大角度入射的方向传播的光线,所以棱柱对此类光线提供的横截面极小。 Because of such reflection occurs only in direction relative to the incident side into a larger incident angle of the light propagation direction, so the cross-section of the prism light of such offer is minimal. 另外,许多此类光线将重新进入下一个棱柱并被返回显不器。 In addition, many of these rays will re-enter the prism and returned the next device was not.

从本论述可以看到,在不存在层128的情况下会以与显示器轴线成大角度从显示器中射出的光线,被偏转到靠近该轴线的方向。 We can see from this discussion, in the absence of layer 128 will display a large angle with the axis of the light emitted from the display, is deflected near the axis direction. 少量光将被导向为与该轴线成大角度射出。 A small amount of light will be directed to exit with a large angle to the axis. 因此,我们可以说,以大于预定角的入射角 Therefore, we can say that the angle of incidence greater than a predetermined angle

穿过表面20进入层128的光,与它入射时的角度范围相比,被导向到更窄的角度范围内。 Through the surface 20 into the light absorbing layer 128, and the incident angle range when it is compared it is directed into a narrower range of angles. 以小于预定角的入射角穿过平滑表面20进入层128的光,将朝向背光源向回反射。 128 is less than a predetermined angle of light incidence angle across the smooth surface 20 into the layer, reflected back toward the backlight.

朝向背光源向回反射的光将发生漫射并反射回层128。 Backlight reflected back toward the light will be reflected back layer diffuses and 128. 一般来讲,它将形成不同于第一次形成的角度。 Generally speaking, it will form an angle different from the first formation. 然后重复该过程,以使得更多的光被偏转到更窄的角度范围内。 Then the process is repeated, so that more light is deflected to a much narrower range of angles. 层128的作用的关键方面是,其必须能够反射以在第一预定角度范围内的角度入射在其上的光,并且透过且折射以在第二预定角度范围内的角度入射在其上的光,其中在第二角度范围内的角度大于在第一角度范围内的角度,并且其中在第二角度范围内的光被折射后的角度范围比其入射时的角度范围更窄。 The key aspect of the role of the layer 128 is that it must be capable of reflecting a first angle within a predetermined angular range of light incident thereon, and an angle of refraction by and within a second predetermined range of the incident angle thereof on light, wherein an angle within the second angle range is greater than an angle within the first angle range, and wherein the angle is narrower angle range of the light in the second range of angles of incidence are refracted than the time range.

在一个实施例中,棱柱结构为直棱柱。 In one embodiment, the prism is a straight prismatic structure. 作为另外一种选择,棱柱结构可以为中断状、波纹状、细长状、微透镜阵列、棱锥阵列,或者为其它规则或不规则的图形。 Alternatively, the structure may be interrupted prismatic shape, wavy, slender shape, a microlens array, an array of pyramids, or of other regular or irregular pattern.

图3示出用于液晶电视或液晶监视器的光控制单元的一个实例。 Figure 3 shows an example for the LCD TV or LCD monitor's light control unit. 光控制单元120包括定向回收利用薄膜128,所述薄膜包括在基底130上的许多棱柱形隆起结构129。 120 includes a directional recycling film 128, the thin film on a substrate 130 including a number of prismatic light control unit 129 ridge structure. 定向回收利用层128包括结构化侧和与该结构化侧相对的平面侧131,该结构化侧包括图3实例中的棱柱结构129。 Directional recycling layer 128 comprises structured side and the structured side opposite the flat side 131, the structured side comprises 3 instance prismatic structure 129. 棱柱基底130下方是反射偏振片124。 Prism 130 is a reflective polarizer below the substrate 124. 反射偏振片124下方是下基底132。 Reflective polarizer 124 is below the lower substrate 132. 在对诸如图3的附图所做的讨论中,术语上方和下方、上和下、向上和向下,以及这些术语的变体,用于指出元件在附图方位中的相对位置。 In the discussion of the drawings made as in Figure 3, the above terms and below, up and down, up and down, as well as variants of these terms for the relative positions of elements in the figures indicated orientation. 术语上方和下方并未指定某些元件在最终使用的应用中需要在彼此的上方或下方。 Above and below the term does not specify a certain element in end-use applications required above or below each other. 然而,在本专利申请的全文中这些术语可方便指出元件在附图中的相对位置。 However, in this patent application the full text of these terms can easily point out the relative positions of elements in the figures.

粘结剂层134设置在棱柱基底130和反射偏振片124之间。 Adhesive layer 134 is disposed between the substrate 130 and the prism reflective polarizer 124. 第二粘结剂层136设置在反射偏振片124和下基底132之间。 The second adhesive layer 136 disposed between the reflective polarizer 124 and the lower substrate 132.

当棱柱结构被复合在光控制单元120内时,在直接观察并使用漫射的近似朗伯光源照射光控制单元时,可以看到某些光学伪影。 When the prism structure is complex within the optical control unit 120, in the direct observation and the use of diffusion approximation Lambertian light source light control unit, you can see some optical artifacts. 朗伯源是遵循朗伯余弦定律的光源,也就是说,它具有的强度与观察角的余弦成正比。 Lambert Lambert cosine law source is to follow a light source, which means that it has a strength proportional to the cosine of the angle of observation. 这样获得类似于半球的辐射图。 Thus obtained is similar hemispherical radiation pattern. 在图1示出的显示器装置100中,与漫射板122结合的背光源112产生漫射光源。 In the display apparatus 100 shown in FIG. 1, the backlight 122 and the diffusion plate 112 to produce a combination of diffuse light source. 在光控制单元的背面使用此 With this in the back of the light control unit

类漫射光源时,光从许多不同方向进入光控制单元。 When class diffuse light source, the light from many different directions into the light control unit. 因此,背光源112可 Accordingly, the backlight 112 may

以近似为朗伯光源。 In approximately Lambert source. 色带光学伪影 Ribbon optical artifacts

在光控制单元(包括定向回收利用薄膜和反射偏振片)的输出中可能看见的光学伪影的一个实例是,当观察者处于平行于棱柱结构方向的位置、以与竖直轴成斜角的方式观察该单元时,将看到亮带和暗带。 The output light control unit (including directional recycling film and a reflective polarizer) is an instance of an optical artifact might see that when the viewer in the direction parallel to the prismatic structure of the position, with the vertical axis of the bevel When the way of seeing the unit, will see light and dark bands. 由于光被棱柱结构折射而使亮带呈现颜色。 Because the light is refracted prism structure leaving bright color band presented. 在一些构造和观察条件下的颜色没有其它条件下那么明显。 In some configurations, color and viewing conditions are no other conditions so obvious. 产生此色带的光线从上方或下方进入该薄膜,通过棱柱结构发生折射,然后以特定角度离开薄膜。 This ribbon produces light entering from above or below the film, is refracted by the prism structures, and then leave the film at a specific angle.

如上所述,光控制单元背面的漫射光源将使光从许多不同方向进入光控制单元。 As described above, the light control will allow diffuse light source unit on the back of light from many different directions into the light control unit. 这些光线离开光控制单元的角度和位置将由棱柱几何形状特有的因素确定,诸如棱柱的间距、棱柱涂层的光折射率以及基底厚度。 The light rays exiting the light angle and position of the control unit by a prismatic geometry specific factors determined, such as the prism pitch, and the refractive index of the prism substrate coating thickness. 一些光线将以发生全内反射的角度入射到光控制单元的表面。 Some of the light will be the incidence angle of total internal reflection of light incident on the surface of the control unit. 当从倾斜角度观察光控制单元时,这些光线的全内反射将致使出现暗带和与之邻近的亮带。 Light control unit when viewed from an oblique angle, total internal reflection of light will cause the emergence of these dark bands and bright band adjacent thereto. 观察到的亮带常常有一系列颜色。 Often observed with a series of bright colors.

光控制单元发出的光的锥光图有助于示出由漫射源照射的光控制单元 Light control unit emitted light cone is shown in FIG help diffuse source light emitted by the control unit

的输出情况。 The output of the situation. 亮带和暗带在此锥光图中是显而易见的。 Bright and dark bands in this conoscopic figure is obvious. 图4示出用于分析光控制单元120的输出光的实验装置的一个实施例。 One embodiment of the test apparatus is shown in Figure 4 for analyzing the output light of the optical control unit 120 of FIG. 在图4的实验构造中,光控制单元120被设置成邻近漫射光源142。 In Figure 4, the experimental configuration, the light control unit 120 is arranged adjacent the diffuse light source 142. 锥光镜146被设置在光控制单元120的相对侧上。 Conoscope 146 is disposed on the opposite side of the light control unit 120. 另外,吸收玻璃偏振片144可以设置在锥光镜与光控制单元120之间。 In addition, the absorbing glass polarizer 144 may be provided between the cone of light microscopy and light control unit 120. 使用可得自Eldim SA (Herouville, Saint Clair, France)的EZContrast锥光镜收集锥光镜检数据。 Use available from Eldim SA (Herouville, Saint Clair, France) of EZContrast conoscope collect the cone of light microscopy data.

从棱柱的平面侧照射的棱柱薄膜的锥光图在图5中示出。 Cone of light from the prism film plane side illumination prism diagram is shown in Figure 5. 锥光测量通过透镜收集来自光源的所有入射角度的光线,所述透镜将光线投射到检测器上。 Cone angle of incidence of light measurement to collect all of the light from the light source through a lens onto the light detector. 该检测器/透镜组合被设计成使射入检测器的光线来自所有方向和单一一个点。 The detector / lens combination is designed such that the incident light from the detector in all directions and a single point. 该图可用于分析说明光源发出的光的角度分布。 This figure can be used to analyze the description of light emitted angle of the light distribution.

在图5中,使用范围从白色到黑色的16种不同灰阶中的某一种来表示某角度处的光强度。 In Figure 5, range from white to black in 16 different gray to represent a certain kind of light intensity at a certain angle. 最暗区域表示光强度最高。 The darkest areas represent the highest light intensity. 最亮区域表示该区域没有接收到光。 The brightest areas represent the region does not receive the light. 图5右侧的数值刻度的单位为坎每平方米,提供了在具体观察位置处的显示器亮度指示。 Figure 5 on the right side of the numerical scale units Hom, a monitor at the location provided specific instructions observed brightness per square meter. 如图5所示,当从平行于棱柱形隆起的观察位置观察薄膜时,在从约40°到60°的斜角范围内将看到暗亮相邻带。 As shown in Figure 5, when viewed from the ridge parallel to the prismatic film viewing position to observe, within the range of from about 40 ° bevel to 60 ° dark light you will see adjacent bands.

图5中锥光图的最亮区域为图上居中的北美橄榄球形区150。 North American football-shaped area in Figure 5 conoscopic plot of the brightest area is centered on the map 150. 在橄榄球形区150边缘处,随着远离橄榄球形区150的边界,光的强度将变低。 In the football-shaped region 150 at the edge, as the distance from the boundary of the football-shaped region 150, the intensity of light becomes low. 然而,当观察者沿着垂直于棱柱结构的方向移动时,在到达距竖直轴约40°或-40°的角度时将看到交替的亮带和暗带。 However, when the observer moves along a direction perpendicular to the prism structure, the arrival angle from the vertical axis, or about 40 ° -40 ° will see alternating light and dark bands. 这些亮带和暗带可以在图5的附图标记152和153所指示的区域看到。 These bright and dark bands can be labeled in the drawing of FIG. 5 indicates the 152 and 153 area see.

与含有直棱柱的结构相比,在含有非直棱柱的棱柱结构的光控制薄膜中,当观察者平行于该结构时将看到较少的彩虹带。 Compared with a straight prismatic structure, prismatic light control film structure comprising a non-linear prism, when viewed parallel to the structure will see fewer rainbow belt.

这些色带的成因将在下文结合图6和7做进一步论述。 The causes of these ribbons will be in conjunction with FIG. 6 and 7 below for further discussion.

值得注意的是,将光控制单元复合在典型的液晶监视器或液晶电视构造内后,色带通常不可见。 It is noteworthy that, the light control unit complex after a typical LCD monitor or LCD TV configuration, the ribbon is usually not visible. 许多液晶监视器或液晶电视构造包括作为液晶显示器的一部分的防眩光偏振片。 Many LCD monitor or LCD TV configuration includes an anti-glare polarizer as the liquid crystal display part. 此防眩光偏振片通常可有效降低这些偏振光带的可见性。 This anti-glare polarizer generally reduce the visibility of polarized bands. 造成这种结果的原因是,亮带与暗带的角度间距小,仅大致为约2到5度。 The reason for this result is that the angle of light and dark bands with spacing small, roughly only about 2-5 degrees. 因此,雾度为百分之四到六的单层薄膜足以散射这些色带中的光,并降低这些色带在液晶显示器系统中的可见度。 Therefore, the haze is a monolayer film four to six percent of these ribbons enough to scatter the light, and reduce the visibility of these ribbons in the liquid crystal display system. 因此,当将光控制系统复合在所述液晶显示器系统(包括位于观察者和光控制单元之间的防眩光偏振片)内时,亮带和暗带很可能不可见。 Therefore, when the light control system complex in the liquid crystal display system (includes a glare polarizer between the observer and the light control unit), the bright and dark bands it may not be visible. 然而, 一些系统的液晶显示器中不包括防眩光偏振片,因而可以看见液晶显示器系统中的色带。 However, some systems do not include a liquid crystal display antiglare polarizer, a liquid crystal display system, it is possible to see the ink ribbon. 另外,在将光控制单元复合到液晶显示器系统内之前这些色带也是可见的。 In addition, before the light control unit complex into the liquid crystal display system of these ribbons are also visible. 因此,检验光控制单元的质量和均匀度的人员会注意到这些色带。 Therefore, the quality and uniformity in testing the light control unit will take note of these ribbons. 所以,期望消除在光控制单元中出现的这些色带。 Therefore, it is desirable to eliminate the light control unit appearing in these ribbons.

根据本发明,通过在光控制单元120的结构中添加漫射元件或漫射结构,可以隐藏色带结构。 According to the present invention, by adding a diffusing element or diffuse structure in the structured light control unit 120, you can hide the ribbon structure. 在一个实施例中,漫射结构可以是折射率与棱柱树脂不同的小珠、微气隙或其它光散射颗粒。 In one embodiment, the diffusion structure may be a prism with a refractive index different from the resin beads, micro air gap or other light scattering particles. 作为一种选择,为了产生类似的效果,棱柱表面可以是粗糙的,又一个选择是将漫射元件添加到棱柱基底的本体中、棱柱树脂内或层合的粘结剂内。 As an alternative, in order to produce a similar effect, prism surface may be rough, but one option is to add to the body diffusing element prism base, the inner prism resin or laminating adhesive. 添加这些漫射结构直到至少可消除上述的亮带和暗带为止。 Adding these diffuse structure until at least can eliminate the above-described light and dark bands so far.

在一个实例中,在光控制单元120内引入消除色带的漫射结构,将在光控制单元中引入5%或更大的霾系数。 In one example, the control unit 120 in the light diffusion structure is introduced to eliminate ribbon, it will introduce a 5% or greater coefficient of haze in the optical control unit. 又如,霾系数为8%,而又如,该系数为10%或以上。 Again, haze factor of 8%, but such that the coefficient of 10% or more. 在其它示例性构造中,霾系数为15%或以下、12% In other exemplary constructions, the haze factor is 15% or less, 12%

或以下。 Or less. 在一个实施例中,霾系数为约5%。 In one embodiment, the haze factor of about 5%. 在一个实施例中,霾系数为10%或以下、9%或以下、或者8%或以下。 In one embodiment, the haze factor is 10% or less, 9% or less, or 8% or less. 其它对照优势 Other controls Advantages

在液晶电视中,包括光控制系统、并且光控制系统中的棱柱结构邻近液晶面板的照明系统,与棱柱在其它薄膜下(诸如在反射偏振片或其它漫射薄膜下)的系统相比,前者通常在适度宽的视角(诸如约30到50 度)内产生亮度变化率更高的亮度分布。 In LCD TVs, including a light control system, and the light control system prismatic structure adjacent liquid crystal panel lighting system under other film (such as a reflective polarizer or other diffusion film under) system compared with the prism, the former generally produces higher brightness at a moderate rate of change in a wide viewing angle (such as about 30 to 50 degrees) of the brightness distribution. 此现象在例如美国专利No. 6,091,547中有所论述和图示说明,该专利以引用的方式并入本文。 This phenomenon has been discussed and illustrated for example in U.S. Patent No. 6,091,547, which is incorporated by reference herein. 在多种应用中,光随着观察者离轴移动而陡然减少,导致显示的信息突然消失,即使有一些光以该角度被导向观察者也仍然如此。 In many applications, the off-axis light as the viewer moves abruptly reduced, leading to a sudden disappearance of the displayed information, even if some of the light is guided to the angle of the viewer is still true. 此效果会使观察者感到不安。 This effect makes the viewer feel uneasy. 根据本发明在光控制单元内添加漫射结构还可以修正此问题, 并降低亮度变化率。 According to the present invention is added to the optical control unit diffusion structure may also correct this problem and reduce the rate of change of brightness.

色带光学伪影的成因 Cause ribbon optical artifacts

在检验色带成因的过程中,本发明的发明人发现,受到近似朗伯光源照射的光控制单元所发出的光为带状,或被限定在特定的输出角度集合内。 In the test ribbon causes of the process, the present inventors have found that, by a strip of light emitted by the light source is approximately Lambertian light control unit, or limited to a specific output angle collection. 此带状可以通过具体的光线在透射通过该薄膜的棱柱结构时发生的表面相互作用的次数来表征。 This strip can be characterized by specific light transmissive surface interaction occurs when the number of times through the prism structure of the thin film.

图6和7示出通过棱柱结构的某些光线路径以及表面相互作用的具体次数。 6 and FIG. 7 shows a specific frequency of light through a certain path, and the surface of the prism structure interaction. 例如,图6中理想的光线160以与竖直方向呈约30°角并位于近似与棱柱300的主轴垂直的平面内的方式入射,该光线160从空气156 中进入基底157,经过棱柱158,然后射入检测器159。 For example, the ideal light 6 160 to the vertical direction was about 30 ° angle and is located approximately in the plane perpendicular to the prism of the spindle 300 is incident, the light enters from the air 156 of 160 base 157, through the prism 158, then enters the detector 159. 此光线160在离开光控制单元之前,在其到达检测器的过程中将与棱柱结构的四个表面相互作用: Before leaving this light 160 light control unit, it reaches the detector will process four surfaces and prismatic structure interactions:

基底-空气界面161, Basement - air interface 161,

棱柱-基底界面162, Prism - substrate interface 162,

棱柱-空气界面164,以及 Prism - air interface 164, and

空气-检测器界面165。 Air - detector interface 165.

这些仅一次透过棱柱结构薄膜而射出的理想光线的输出角一般集中在图5中图的橄榄球形区域150中。 These ideal light output angle only once through the prism structure of the film and is emitted generally concentrated in the diagram in Figure 5 football-shaped region 150. 另一类光线路径虽然仅一次透过光控制单元并射出,但是其以不期望 Another ray paths although only once through the light control unit and exit, but do not expect it to

的角度射出。 Angle shot. 如图6所示,类似于已论述的第一组光线,这些光线166 以与竖直方向呈约30°角并近似位于与棱柱的主轴垂直的平面内的方式入射。 As shown in Figure 6, similar to the first set of rays has been discussed, these rays 166 in the vertical direction was about 30 ° angle and is approximately located in the spindle and perpendicular to the plane of the prism is incident. 然而,这些光线以不期望的掠射角射在棱柱-空气界面处,并因此以掠射角从光控制单元中射出。 However, these light rays undesirable glancing angle shot in the prism - air interface, and therefore at grazing angles of light emitted from the control unit. 这组光路仅一次透过薄膜而射出,但有五次表面相互作用,然后离开薄膜(附图标记为166)。 This set the optical path through the film and shot only once, but there are five surface interactions, and then leave the film (reference numeral 166). 光路166从光控制单元中以掠射角射出,因此它们在锥光镜中被描绘为位于图5的边缘区域154、 155处轮廓相当分明的带中。 The optical path from the optical control unit 166 at grazing angles shot, so they are depicted as on the edge of the area 154 in FIG. 5, 155 quite distinct profile in the cone of light with mirror.

图7示出有十次表面相互作用的光线167。 Figure 7 shows there is light ten 167 surface interaction. 这些光线从光控制单元中射出,形成在图5所示锥光图的边缘区域154、 155处的由暗区分隔的亮区的离散带。 The light emitted from the light control unit, forming a discrete band at the edge of the area shown in FIG. 5 light cone diagram 154, separated by a dark area 155 of the bright area. 当本发明人鉴别具有多种不同次数的表面相互作用的光线路径时,他们观察到,对于给定次数的相互作用,输出光被限于严格限定的输出角范围内。 When the present inventors have light path identification number of a variety of different surface interactions, they observed the interaction of a given number of times, the output light is confined to the strictly limited range of output angle. 具体光线遇到的表面的数量和类型由薄膜系统具体的几何形状决定,包括基底厚度。 The number and type of light encountered specific surface is determined by the specific geometry of the film system comprising a substrate thickness. 因此,输出光精确的角形或色带在极大程度上取决于薄膜系统具体的几何形状。 Therefore, the output light precise angular or ribbon system depends on the specific geometry of the film to a large extent. 例如,对于图5所示的锥光图,基底厚度为10密耳,棱柱结构的角度为90°,棱柱结构的厚度为25微米,并且棱柱有尖峰。 For example, as shown in FIG. 5 conoscopic diagram, the substrate having a thickness of 10 mils, the angle of the prism structure is 90 °, the thickness of the prismatic structure is 25 microns, and has a peak prism. 期望在橄榄球形区150具有高强度的输出光,这是因为可以在观察者最有可能出现的角度处产生最高的光强。 It expects football-shaped region 150 has high intensity light output, it is because in most observers produce the highest intensity possible angles. 然而,在锥光图的区域152, 153中看到的亮带和暗带是不可取的。 However, in the light cone diagram area 152, 153 see bright and dark bands is not desirable. 当观察者沿着垂直于棱柱结构的视线以倾斜的角度观察光控制单元时,它们会使得观察者观察到色带。 When the viewer a direction perpendicular to the line of sight prism structure oblique angle observation light control unit, they will make the observer observed ribbon.

现在,结合图8-14讨论为了消除或减少亮带和暗带,将漫射功能结合到光控制单元的不同技术和结构的具体实施方式。 Now, in conjunction with Figure 8-14 to discuss in order to eliminate or reduce the light and dark bands, will diffuse functions into specific embodiments different techniques and structure of an optical control unit. 光控制单元中漫射结构的实例 Examples of the cell structure of the light diffusion control

图8示出本发明一个实施例的光控制薄膜174,其中棱柱结构180 包括粗糙表面182。 Figure 8 shows the light control film 174 is an embodiment of the invention, wherein the prism structure 180 includes a roughened surface 182. 该棱柱结构表面182通常通过抵靠着工具模压树脂或聚合物而形成,并且所述工具可以是粗糙的,以提供期望的漫射程度。 The prism structure surface against the tool 182 is generally molded by a resin or polymer is formed, and the tool may be roughened to provide a desired degree of diffusion. 图8 (和图9-14)中的其它元件与图3所示元件的附图标记相同,其中相同的附图标记指示类似的结构。 FIG. 8 (and FIG. 9-14) the same reference numerals and the other elements of the device shown in FIG. 3, wherein like reference numerals indicate similar structure. 作为另外一种选择,图8中的棱柱结构180的粗糙表面182可以通 Alternatively, Figure 8 prismatic structure 180 of a rough surface 182 may pass

过二次涂敷工艺产生。 Generated through the secondary coating process.

图9示出本发明另一个实施例的光控制薄膜187,其中棱柱结构188 整合有一体的光漫射特征。 Figure 9 shows another embodiment of the invention the light control film 187 embodiment, wherein the prism structure 188 integrated with an integral light diffusing characteristics. 该漫射特征可以是折射率与棱柱树脂不同的小珠、微气隙或其它光散射颗粒。 The diffusion characteristics may be different from the refractive index of the prism resin beads, micro air gap or other light scattering particles.

漫反射颗粒的实例包括二氧化钛、硫酸钡、碳酸钙等。 Examples of diffusely reflective particles include titanium dioxide, barium sulfate, calcium carbonate, and the like.

图10示出本发明另一个实施例的光控制薄膜191,其中通过棱柱涂层128和棱柱基底192之间的不平滑表面以及界面处的折射率失配实现光散射。 Figure 10 shows another embodiment of the invention, the light control film 191 embodiments, wherein the refractive index is not a smooth surface coating through the prism 128 and the prism base 192 and at the interface between the mismatch achieve light scattering. 棱柱基底192包括不平滑的上表面194。 Prism base 192 includes an upper surface 194 is not smooth.

图11示出本发明另一个实施例的光控制薄膜197,其中棱柱基底198掺有光散射颗粒。 Figure 11 shows another embodiment of the invention, the light control film 197 embodiment in which the substrate 198 doped prism light scattering particles. 该光散射颗粒可以为上文关于图9所述的任何可选物。 The light scattering particles may be any optional material above with respect to FIG. 9.

图12示出本发明又一个实施例的光控制薄膜200,其中棱柱基底202包括结构化的下表面201。 Figure 12 shows a further embodiment of the light control film 200 of the present embodiment of the invention, wherein the prism substrate 202 includes a lower surface 201 of the structure. 可以使用工具或使用涂层产生该结构化的下表面。 You can use the tools or the use of coatings produced at the surface of the structured. 另外,粘结剂层204具有与基底折射率不相似或不相同的折射率。 Further, the adhesive layer 204 having a refractive index of the substrate is not similar or the same refractive index. 粘结剂折射率与基底折射率的失配、以及结构化的基底下表面这二者结合起来向光控制单元200提供一定程度的漫射。 The refractive index of the refractive index of the adhesive base mismatch, and the lower surface of the base structure of the combination of both the light control unit 200 provides a degree of diffusion.

图13示出本发明替代实施例的光控制薄膜205,其中在棱柱基底130和反射偏振片124之间的粘结剂层206掺有光散射颗粒。 Figure 13 shows an alternative embodiment of the present invention, the light control film 205, wherein the substrate between the prism 130 and reflective polarizer 124 adhesive layer 206 doped with light scattering particles.

图14示出根据本发明的新型光控制单元207。 Figure 14 shows a new optical control unit 207 of the present invention. 该光控制单元207包括含有漫射特征的反射偏振片表层210,该表层设置在反射偏振片124和粘结剂层134之间。 The control unit 207 includes a light reflective polarizer surface layer 210 containing the diffusion characteristics of the surface layer is disposed between the reflective polarizer 124 and adhesive layer 134. 表层可以包含两种或更多种不混溶的聚合物,其折射率的不同提供光散射效果,并且其粒度分布可以控制表层内的漫射量。 The surface layer may comprise two or more immiscible polymers, to provide the light scattering effect of different refractive index, and the particle size distribution can be controlled within the diffusion volume surface. 可供选择的用于制造漫射的方法包括改性的表面结构和在表层材料中添加的离散颗粒。 The method for manufacturing a diffuse surface structure options include modified and discrete particles in the surface material added. 所述表层可以在单独的工艺中生产,并可通过层合工艺永久性或半永久性附加到光学介质上,所述层合工艺包括但不限于压敏粘结剂、 热固性粘结剂、以及化学固化或光固化的粘结剂。 The surface layer can be produced in a separate process, and through lamination process permanent or semi-permanent attached to the optical medium, the lamination process, including but not limited to, pressure sensitive adhesives, thermoset adhesives, and chemical curing or light curing adhesive.

示例性液晶显示器元件 Exemplary liquid crystal display element

现在将描述根据本发明的液晶显示器系统的元件的一些示例性结构。 Now describe some exemplary structure of a liquid crystal display element according to the system of the present invention. 背光源112的反射器118可以是镜面反射器,或者是漫反射器。 Backlight 118 reflector 112 may be a specular reflector or a diffuse reflector. 可用作反射器118的镜面反射器的一个实例为Vikuiti™增强型镜面反射 One example of a specular reflector may be used as the reflector 118 is Vikuiti ™ Enhanced specular reflection

(ESR)薄膜,可得自3M Company (St. Paul, Minnesota)。 (ESR) film available from 3M Company (St. Paul, Minnesota). 适于漫反射器的实例包括填充有漫反射颗粒(诸如二氧化钛、硫酸钡、碳酸药等颗粒) 的聚合物(诸如PET、 PC、 PP、 PS (先前未限定的縮写在下文限定))。 Examples of suitable diffuse reflectors include diffuse filled with particles (particle such as titanium dioxide, barium sulfate, carbonate, drugs, etc.) of the polymer (such as PET, PC, PP, PS (abbreviations not previously defined are defined below)). 漫反射器的其它实例,包括微孔材料和含纤丝材料,在共同拥有的美国专利申请公开2003/0118805 Al中有所论述,该专利申请公幵以引用的方式并入本文。 Other examples of diffuse reflectors, including microporous materials and fibril-containing materials, in commonly owned U.S. Patent Application Publication 2003/0118805 Al are discussed in the Patent Application Publication 幵 incorporated herein by reference. 现在将论述用于光控制单元元件的材料和结构的选择。 It will now be discussed in the light control unit for selecting the material elements and structures.

任何适合类型的反射偏振片都可使用,例如,可使用多层光学膜(M0F) 反射偏振片,诸如连续/分散相偏振片、线栅反射偏振片或胆甾型反射偏振片。 Any suitable type of reflective polarizer may be used, e.g., multilayer optical film may be used (M0F) reflective polarizer, such as continuous / disperse phase polarizers, wire grid reflective polarizers or cholesteric reflective polarizer.

M0F以及连续/分散相反射偏振片均依赖通常为聚合物材料的至少两种材料之间的折射率差值,从而实现选择性地反射一种偏振态的光,而透射与之垂直的偏振态的光。 M0F and continuous / disperse phase reflective polarizers rely refractive index difference is typically a polymer material between at least two materials, in order to achieve selectively reflect one polarization state of light, while transmitting the polarization state perpendicular thereto light. M0F反射偏振片的一些实例在共同拥有的美国专利No. 5, 882, 774中有所描述,该专利以引用的方式并入本文。 Some examples of the reflective polarizer M0F 5, 882, 774 are described in commonly-owned U.S. Patent No., which patent is incorporated herein by reference. 可商购获得的M0F反射偏振片的实例包括具有漫射表面的Vikuiti™ DBEF-D200 和DBEF-D440多层反射偏振片,可得自3M Co卿any (St. Paul, Minnesota)。 Examples M0F reflective polarizer can be commercially available include Vikuiti ™ DBEF-D200 and DBEF-D440 multilayer reflective polarizer has a diffuse surface, available from 3M Co Big any (St. Paul, Minnesota).

可与本发明结合使用的线栅偏振片的一些实例包括在美国专利No. 6,122,103中描述的那些。 Some examples can be used in conjunction with the present invention, the wire grid polarizers include those described in U.S. Patent No. 6,122,103 in. 线栅偏振片尤其可从Moxtek Inc. (Orem, Utah)商购获得。 Wire grid polarizers are commercially available, especially from Moxtek Inc. (Orem, Utah) providers.

可与本发明结合使用的胆甾型偏振片的一些实例包括在例如美国专利No. 5,793,456和美国专利申请公开No. 2002/0159019中描述的那些。 Some examples can cholesteric polarizer used in conjunction with the present invention include, for example, U.S. Patent No. 5,793,456 and U.S. Patent Application Publication No. 2002/0159019 those described.

胆甾型偏振片经常与设置在输出侧的四分之一波长延迟层一起提供,以使得透射穿过胆甾型偏振片的光被转换成线性偏振。 Cholesteric polarizers are often provided at the output side of the quarter-wavelength retardation layer provided together, so that the light transmitted through the cholesteric polarizer is converted to linearly polarized light.

本发明的图示实施例包括棱柱基底130和下基底132,但这些基底在复合有漫射结构的时候则采用不同的附图标记加以标示,如图8-14所示。 The illustrated embodiment of the present invention includes a prism base 130 and the lower substrate 132, but these substrates in a composite structure has a diffusion time is used to indicate different reference numerals shown in Figure 8-14. 基底130、 132可以由对可见光基本透明的任何材料制成,例如,所述材料为有机或无机材料,包括玻璃和聚合物。 Substrate 130, 132 may be made of any material substantially transparent to visible light made of, e.g., the material is organic or inorganic materials, including glass and polymers. 不同子组件的基底130和132不需要用相同的材料制成。 Different substrate subassembly 130 and 132 do not need to be made of the same material. 适合的玻璃包括浮法玻璃(即,使用浮法工艺制成的玻璃)或具有液晶显示器级品质的玻璃(称为液晶显示器玻璃),后者的特征性能(诸如厚度和纯度)比浮法玻璃更好控制。 Suitable glasses include float glass (i.e., made of a glass float process) or a liquid crystal display-quality glass (referred to as liquid crystal display glass), whose performance characteristics (such as thickness and purity) than float glass better control. 适合的聚合物材料可以是非晶态或半结晶性的,并可包含均聚物、共聚物或它们的共混物。 Suitable polymeric materials may be amorphous or semi-crystalline, and may include homopolymer, copolymer or blends thereof. 也可以使用聚合物泡沫。 You can also use polymer foam. 聚合物材料的实例包括但不限于非晶态的聚合物,诸如:聚碳酸酯(PC);聚苯乙烯(PS);聚丙烯酸酯,例 Examples of polymeric materials include, but are not limited to, an amorphous polymer, such as: a polycarbonate (PC); polystyrene (PS); polyacrylates, for example,

如,由Cyro Industries (Rockaway, New Jersey)以品牌ACRYLITEŽ提供的聚丙烯酸酯薄片;丙烯酸酯共聚物,诸如丙烯酸异辛酯/丙烯酸共聚物;聚甲基丙烯酸甲酯(PMMA); PMMA共聚物;聚环烯烃和环烯烃共聚物;丙烯腈-丁二烯-苯乙烯(ABS);苯乙烯-丙烯腈共聚物(SAN);环氧树脂;聚乙烯基环己垸;PMMA/聚氟乙烯共混物;无规聚丙烯;聚苯醚合金; 苯乙烯嵌段共聚物;聚酰亚胺;聚砜;聚氯乙烯;聚二甲基硅氧烷(PDMS);聚氨酯;聚碳酸酯/脂肪族PET共混物;聚合物材料的实例还包括半结晶性聚合物,诸如:聚乙烯;聚丙烯;聚对苯二甲酸乙二醇酯(PET);聚萘二甲酸乙二醇酯(PEN);聚酰胺;离聚物;乙酸乙烯酯/聚乙烯共聚物;乙酸纤维素;乙酸丁酸纤维素;氟聚合物;聚苯乙烯-聚乙烯共聚物;以及PET和PEN共聚物。 For example, a polyacrylate sheet made Cyro Industries (Rockaway, New Jersey) brand ACRYLITEŽ provided; acrylate copolymers, such as isooctyl acrylate / acrylic acid copolymer; polymethyl methacrylate (PMMA); PMMA copolymer ; poly cyclic olefins and cyclic olefin copolymer; an acrylonitrile - butadiene - styrene (ABS); styrene - acrylonitrile copolymers (SAN); epoxy resin; polyvinyl cyclohexyl embankment; PMMA / polyvinyl fluoride blend; atactic polypropylene; polyphenylene ether alloys; styrene block copolymers; polyimides; polysulfones; PVC; polyurethane;; polydimethylsiloxane (PDMS) Polycarbonate / aliphatic PET blends; further examples of polymeric materials include semi-crystalline polymers such as: polyethylene; polypropylene; polyethylene terephthalate (PET); polyethylene naphthalate polyethylene terephthalate ( PEN); polyamides; ionomers; vinyl acetate / polyethylene copolymer; cellulose acetate; cellulose acetate butyrate; fluoropolymer; -; and PET and PEN copolymers of polystyrene polyethylene copolymer.

漫射板除了向液晶显示屏提供更均匀的照明以外还可起到提供支承结构的目的,光控制单元的薄膜倚靠在其上。 In addition to the liquid crystal display diffusion plate to provide more uniform illumination can also play other than the purpose of providing a support structure, the light control unit films rely thereon. 虽然由相连层构成的薄膜叠堆中的各层对叠堆刚度有一定的贡献作用,但基底是对刚度的贡献作用最大的层,即,其提供大于叠堆中的任何其它层所提供的抗弯性能。 Although the thin film layer is connected in the stack of layers of the stack have some contribution to stiffness effect, but the effect of the stiffness of the substrate is a maximum contribution of the layer, i.e., providing more than any other layers in the stack provided The flexural properties. 漫射板通常不会在其自身重量下显著变形,但是它会以一定程度下陷。 The diffusion plate is usually not significantly deformed under its own weight, to a certain extent, but it will subside. 漫射板可以为,例如,最多几毫米厚,这取决于显示器的尺寸和使用的材料的类型。 Diffusion plate may be, for example, up to a few millimeters thick, depending on the size and type of material used for the display. 在一个示例性实施例中,30英寸液晶电视含2密耳厚的P丽A本体漫射板。 In one exemplary embodiment, the 30-inch LCD TV with 2 mil thick P Lai A body diffusion plate. 在另一个示例性实施例中,40英寸液晶电视含3密耳厚的PMMA本体漫射板。 In another exemplary embodiment, a 40-inch LCD TV with 3 mil thick PMMA body diffusion plate. 漫射板可以为半透明聚合物板或玻璃板,厚度可在1-5 mm的范围内(包括端值)变化。 The diffusion plate may be translucent glass plate or a polymer, the thickness may range from 1-5 mm (including the end values) change.

图1中示出的液晶显示器100包括漫射板122。 Figure 1 shows the liquid crystal display 100 includes a diffusion plate 122. 漫射板122可被包括在本发明的液晶显示器的示例性实施例中。 The diffusion plate 122 may be included in the liquid crystal display of the present invention, an exemplary embodiment. 漫射板的示例性实施例包括含有漫射颗粒的聚合物基质。 Exemplary embodiments of the diffusion plate comprises a polymer matrix containing diffusing particles. 该聚合物基质可以为对可见光基本上透明的任何适合类型的聚合物,例如,为上文所列的任何聚合物材料。 The polymer matrix may be any suitable type of polymer is substantially transparent to visible light, for example, any of the polymeric materials listed above. 漫射颗粒可以是用于使光发生漫射的任何类型的颗粒,例如,折射率不同于周围聚合物基质的透明颗粒、漫反射颗粒或者基质中的空隙或气泡。 Diffusing particles may be used to make any type of light generating diffusing particles, for example, differs from the refractive index of the transparent polymer matrix around the particles, diffusely reflective particles, or voids or bubbles in the matrix. 合适的透明颗粒的实例包括:实心或空心的无机颗粒,例如,玻璃珠或玻璃壳;实心或空心的聚合物颗粒,例如聚合物实心球或聚合物空心 Examples of suitable transparent particles include: inorganic particles of solid or hollow, for example, glass beads or shells; solid or hollow polymer particles, such as polymer or polymer solid ball hollow

球。 Ball. 合适的漫反射颗粒的实例包括二氧化钛(Ti02)、碳酸钙(CaC03)、硫酸钡(BaS04)、硫酸镁(MgS04)等的颗粒。 Examples of suitable diffusely reflecting particles include titanium dioxide (Ti02), calcium carbonate (CaC03), barium sulfate (BaS04), magnesium sulfate (MgS04) and other particles. 另外,可使用聚合物基质中的空隙来使光发生漫射。 Further, the polymer matrix can be used to make void diffuses light. 可以使用气体,例如空气或二氧化碳,填充这类空隙。 Gas can be used, such as air or carbon dioxide, filling such voids. 可商购获得的适用于漫射板的材料包括3M™ Scotchcal™ Diffuser Film, 3635-70型和3635-30型,以及3M™ Scotchcal™ ElectroCut™ Graphic Film , 7725-314型,可得自3M Co卿any (St. Paul , Minnesota)。 May be commercially available material suitable for diffusion plate include 3M ™ Scotchcal ™ Diffuser Film, 3635-70 and 3635-30 model type, and 3M ™ Scotchcal ™ ElectroCut ™ Graphic Film, 7725-314 type, available from 3M Co Big any (St. Paul, Minnesota). 其它可商购获得的漫射板包括丙烯酸泡棉胶带,诸如3M™ VHB™ Acrylic Foam Tape No. 4920。 Other commercially available diffusion plate include acrylic foam tape, such as 3M ™ VHB ™ Acrylic Foam Tape No. 4920.

漫射板122可以任选另外的图案化漫射体作为补充。 The diffusion plate 122 may optionally further patterned diffuser as a supplement. 图案化漫射板122可以包括,例如图案化漫射表面或漫射体(诸如二氧化钛(Ti02)颗粒)印刷层。 Patterning the diffusion plate 122 may include, for example, a patterned diffusing surface or diffuser (such as titanium dioxide (Ti02) particles) printing layer. 该图案化层可以位于漫射板122和基底132之间,或位于漫射板122的上方。 The patterned layer may be positioned between the diffusion plate 122 and the substrate 132, or located above the diffusion plate 122. 该图案化漫射体可以,例如印刷到漫射板122上或印刷在漫射板122上方的薄片上。 The patterned diffuser may be, for example, printed on a sheet on top of the diffusion plate 122 on the diffusing plate 122 or printing.

上述说明书提供了本发明的结构和使用的完整说明。 The above specification provides a complete description of the structure and use of the present invention. 可在不脱离本发明的精神和范围的情况下实现本发明的多种实施例,本发明由权利要求限定。 It can be achieved without departing from the spirit and scope of the present invention of the present invention, various embodiments of the present invention defined by the claims.

Classifications
International ClassificationG02B5/30
Cooperative ClassificationG02F1/133536, G02F1/133606
European ClassificationG02F1/1336B4, G02F1/1335P5
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19 Nov 2008C06Publication
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3 Nov 2010C14Granted