CN100437254C - Liquid crystal display panel and method for producing same - Google Patents
Liquid crystal display panel and method for producing same Download PDFInfo
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- CN100437254C CN100437254C CNB2005101038346A CN200510103834A CN100437254C CN 100437254 C CN100437254 C CN 100437254C CN B2005101038346 A CNB2005101038346 A CN B2005101038346A CN 200510103834 A CN200510103834 A CN 200510103834A CN 100437254 C CN100437254 C CN 100437254C
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Abstract
The present invention relates to a liquid crystal display panel which is provided with a penetration area and a reflection area and comprises an upper basal plate, a lower basal plate which is parallel to the upper basal plate, a reflection layer positioned above the lower basal plate in the reflection area, an insulation layer covering the lower basal plate and the reflection layer, a positive drive electrode and a negative drive electrode which are staggered above the insulation layer, a first orientation layer which is positioned on the surface of the inner side of the upper basal plate and forms different orientations in the penetration area and the reflection area by the light orientation form, a single-orientation second orientation layer covering the reflection layer, the positive drive electrodes and the negative drive electrode, and a liquid crystal layer positioned between the first orientation layer and the second orientation layer.
Description
Technical field
The invention relates to a kind of manufacture method of display panels, and particularly relevant for a kind of manufacture method of penetration reflecting type liquid crystal display panel.
Background technology
The photoelectricity correlation technique is constantly weeded out the old and bring forth the new in recent years, adds the arrival of digital times, and then has promoted the flourish of LCD market.LCD has that high image quality, volume are little, in light weight, low driving voltage, with advantage such as low consumpting power, therefore be widely used in PDA(Personal Digital Assistant), mobile phone, video camera, notebook, desktop display, automobile-used display, and consumer communication or electronic product such as projection TV, and replace cathode-ray tube (CRT) gradually and become the main flow of display.
LCD (Liquid Crystal Display, LCD) be a kind of display device of utilizing liquid crystal characteristic to reach display effect, because its traditional cathode-ray tube display commonly used has better elasticity aspect dimension and weight, therefore, LCD often is used on the various pss at present, little display screen on mobile phone, personal digital assistant and digital camera arrives televisor and advertisement plate greatly, can see the shadow of LCD everywhere.
General penetration (transmissive) display is under outdoor and high light, image can be faded away and cause contrast to reduce, in comparison, reflective (reflective) display is to rely on external light source to reach display effect, therefore reach out of doors under the high light and can present better effect and contrast on the contrary, and can reduce the using time backlight that consumes a large amount of power, so be suitable on the portable product very much.But, reflected displaying device is difficult is issued to height to the requirement of the image of high color quality, especially full-colorization when in high resolving power.But when environment light source is not enough, the contrast and the brightness of reflected displaying device receive discount greatly, therefore if can cooperate the penetration technology of auxiliary backlight to make semi-reflection and semi-transparent (transflective) display, it can have penetration and reflective advantage simultaneously, be applicable to the thin film transistor (TFT) (a-Si TFT) of amorphous silicon or the thin film transistor (TFT) of low temperature polycrystalline silicon active drive technology such as (low temperature polysilicon TFT), therefore present low power consumption TA information products mostly adopt the semi-reflection and semi-transparent display panel panel of this class.
The semi-reflection and semi-transparent display panel can utilize the deficiency of back light system auxiliary environment light source.When environment light source was sufficient, the semi-reflection and semi-transparent display panel need not used built-in illuminating source, but made full use of environment light source and can dispense backlight, to reach the effect of power saving.But, when penetration region was identical with reflector space cel-gap (Cell gap), the penetrance-voltage curve of penetration region (transmittance v.voltage curve) was also inconsistent with the reflectivity-voltage curve (reflectance v.voltage curve) of reflector space.
Traditional semitransparent and half-reflective liquid crystal display (Transflective display), if use single liquid crystal box gap (Single cell gap), then penetrating region uses different control circuits with the echo area, or penetration region uses different transistors to control with reflector space, may increase the complicacy and the degree of difficulty of array (Array), type of drive is also complicated.
United States Patent (USP) then discloses a kind of semi-reflection and semi-transparent display panel technology for No. 6812978, mainly is the liquid crystal born of the same parents are designed to two cel-gap (Dual cell gap), or pastes the semi-reflection and semi-transparent film outward.Fig. 1 illustrates the diagrammatic cross-section of traditional double cel-gap liquid crystal display, as shown in Figure 1, one semi-reflection and semi-transparent display panel 1 includes the upper substrate 10 and infrabasal plate 20 that pair of parallel is provided with, and a liquid crystal layer 30 is inserted in the space of upper substrate 10 and infrabasal plate 20.On the inside surface of upper substrate 10, just in the face of on the surface of infrabasal plate 20, include a black-matrix layer 12 and and share electrode layer 14, be embedded the chromatic filter layer (not shown) in the black-matrix layer, on the surface of shared electrode 14, have both alignment layers 16 on.On the inside surface of infrabasal plate 20,, be to constitute the pixel area of arranged by many gate lines that intersect vertically and data line just in the face of on the surface of upper substrate 10.
Each pixel area is controlled by a thin film transistor (TFT) TFT (not shown), and is partitioned into penetration region 40 and reflector space 50 at least.Pixel area comprises that transparent electrode layer 22 is positioned on the infrabasal plate 20, and a protective seam 24 is positioned on the transparent electrode layer 22.On the protective seam 24 of echo area 50, have a reflecting electrode 26, and both alignment layers 28 is positioned on protective seam 24 and the reflecting electrode 26 once.Liquid crystal layer 30 is arranged between both alignment layers 16 and the following both alignment layers 28.
Since among Fig. 1 as can be known, in a pixel area.Can form two kinds of thickness areas in the liquid crystal layer 30, wherein cel-gap d1 is formed at reflection electrode layer 26 tops, just is positioned at reflector space 50, and cel-gap d2 is formed at transparent electrode layer 22 tops, just be positioned at penetration region 40, and d2 is about the twice of d1.Therefore, when incident ray passes through liquid crystal layer 30 and after reflecting electrode 26 reflections in the zone 50 that is reflected, its optical path of passing by can be identical with the optical path through penetration region 40 backlight, thereby can be so that the penetrance-voltage curve of penetration region 40 (transmittance v.voltagecurve) reaches consistent with the reflectivity-voltage curve (reflectance v.voltage curve) of reflector space 50.
Yet, the liquid crystal born of the same parents are designed to two cel-gap, can suffer from complex manufacturing technology and uppity problem, and if only still can't reach desirable imaging results by outer subsides semi-reflection and semi-transparent film.In view of this, how under the prerequisite of the liquid crystal born of the same parents design with single cel-gap, reaching the required optical design of penetration region and reflector space, will be the important topic of semi-reflection and semi-transparent display panel technology.
Summary of the invention
In view of this, purpose of the present invention is providing a kind of manufacture method of penetration reflecting type liquid crystal display panel, can use the design of single cel-gap and make penetrance-voltage curve and reflectivity-voltage curve reach consistent.
Another object of the present invention is providing a kind of manufacture method of penetration reflecting type liquid crystal display panel, can use single cel-gap design, and with isoplanar switching (In-plane Switching, IPS) technology is controlled liquid crystal molecule, and makes penetrance-voltage curve and reflectivity-voltage curve reach consistent.
Another purpose of the present invention is providing a kind of manufacture method of penetration reflecting type liquid crystal display panel, can design with single cel-gap, and utilize phtotpolymerizable compound to form both alignment layers, alignment layer material can cause different orientation effects with reflector space to liquid crystal molecule in penetration region after photopolymerization.
A further object of the present invention is providing a kind of manufacture method of penetration reflecting type liquid crystal display panel, can use photopolymer to form the both alignment layers of single cel-gap design, and make the penetrance-voltage curve of penetration region reach consistent with the reflectivity-voltage curve of reflector space.
According to above-mentioned purpose of the present invention, a preferred embodiment of the present invention proposes a kind of penetration reflecting type liquid crystal display panel and manufacture method thereof.Transmissive and reflective liquid crystal display device comprises a upper substrate and infrabasal plate at least, and wherein upper substrate and infrabasal plate be arranged in parallel and just be arranged alternately on infrabasal plate with negative drive electrode; First alignment film and second alignment film cover respectively on the upper and lower two substrates facing surfaces, wherein second alignment film covers positive and negative drive electrode and handles through the single shaft parallel orientation, and the material of first alignment film is phtotpolymerizable compound, makes behind the photopolymerization reaction to be positioned at that the penetration reflecting type liquid crystal display panel penetration region has different orientation effects with first alignment film of reflector space to liquid crystal molecule and the tilt angle (pretilt angle) of controlling the liquid crystal molecule of penetrating region and echo area is controlled the penetrating region of LCD and the penetrance of echo area; And liquid crystal layer, this liquid crystal layer is sandwiched between above-mentioned two first alignment films and second alignment film; This two substrates and liquid crystal layer form a sandwich structure.Owing to adopt the isoplanar handoff technique, the direction of an electric field that is just forming with negative drive electrode of infrabasal plate is parallel to substrate.
Second both alignment layers is single orientation in the present invention, and first both alignment layers is adopted different orientations at penetration region and reflector space.In embodiments of the present invention, take in the same way orientation, then take vertical orientation with second both alignment layers in reflector space first both alignment layers in penetration region second both alignment layers and first both alignment layers.Relation between first both alignment layers and second both alignment layers is not only as the described relation of embodiment, do not reach penetrance-voltage curve purpose consistent of penetration region with the reflectivity-voltage curve of reflector space, can cooperate different liquid crystal materials and different cel-gap, utilize ultraviolet light irradiation or different photopolymerization macromolecular compound to adjust the difference that first both alignment layers is positioned at orientation angle between penetration region and reflector space.
The material that forms first both alignment layers can be selected photopolymerization (UV curable) macromolecular compound for use, for example photodimerization bodyization (photodimerization) macromolecular compound, photodestruciton (photodecomposition) macromolecular compound and photoisomerization (photoisomeriztion) macromolecular compound.Photodimerization body macromolecular compound, for example have the polymeric derivative of cinnamic acid ester (cinnamate) sensitization base or have the polymeric derivative of cumarin (coumarin) sensitization base, in polymer side chain, import the photosensitive group that has unsaturated double-bond, after linear polar biased rayed, carry out the reaction of photodimerization body, cause that macromolecule surface produces the optical anisotropy, and then induce liquid crystal molecule to arrange towards specific direction.The photodestruciton macromolecular compound, polyimide for example because thermal stability is high and be non-photosensitive macromolecular, has in utilization under the UV-irradiation of higher-energy, can cause polyimide bond inequality to fracture, induce the effect of liquid crystal arrangement with generation.The photoisomerization macromolecular compound, the macromolecule that for example contains phenylazide (azobenzene), main photochemistry mechanism is photoinduced cis transconfiguration change (cis-trans transition), utilizes such configuration transformation to cause anisotropy and induce Liquid Crystal Molecules Alignment.
By the exposure that is controlled in penetration region or reflector space ultraviolet light, make the liquid crystal molecule in this two zone form different tilt angle (pretilt angle), make the penetrance-voltage curve of penetration region roughly overlap with the reflectivity-voltage curve of reflector space.
Therefore, use the manufacture method of penetration reflecting type liquid crystal display panel disclosed in this invention to have following advantage: (1) can use single cel-gap design, thereby avoids the two complexity of liquid crystal cell gap design on manufacture craft; (2) can use the design of single cel-gap, and use single control circuit to carry out penetration region and reflector space to make and control, to avoid increasing complicacy and the degree of difficulty and the type of drive complicated problems of array (Array); (3) the present invention so formed penetration reflecting type liquid crystal display panel promptly possesses wide-visual angle effect in essence according to the present invention, does not need extra wide viewing angle technology to improve viewing angle characteristic applicable to the isoplanar handoff technique; And (4) can reduce manufacturing cost.
Description of drawings
For above and other objects of the present invention, feature, advantage and embodiment can be become apparent, appended graphic being described in detail as follows:
Fig. 1 illustrates the diagrammatic cross-section of traditional double cel-gap liquid crystal display; And
Fig. 2 illustrates the diagrammatic cross-section of penetration reflecting type liquid crystal display panel of the present invention.
The primary clustering symbol description
1,2: the semi-reflection and semi-transparent display panel
10,102: upper substrate
12: black-matrix layer
14: shared electrode layer
16: go up both alignment layers
20,104: infrabasal plate
22: transparent electrode layer
24: protective seam
26: reflecting electrode
28: following both alignment layers
30,106: liquid crystal layer
40,60: penetration region
50,70: reflector space
108: chromatic filter layer
110: the first both alignment layers
112,124: light polarizing film
114: the reflection horizon
116,122: insulation course
118: positive drive electrode
119: negative drive electrode
120: the second both alignment layers
Embodiment
Please refer to Fig. 2, the diagrammatic cross-section of penetration reflecting type liquid crystal display panel of the present invention is shown.One semi-reflection and semi-transparent display panel 2 has penetration region 60 and reflector space 70, semi-reflection and semi-transparent display panel 2 includes the upper substrate 102 and infrabasal plate 104 that pair of parallel is provided with, and a liquid crystal layer 106 is inserted in the space of upper substrate 102 and infrabasal plate 104.On the inside surface of upper substrate 102, just towards the surface of liquid crystal layer 106, include a chromatic filter layer 108 and one first both alignment layers 110, wherein include red, blue, the green color layer and a black-matrix layer of array in the chromatic filter layer 108.On the outside surface of upper substrate 102, include one first light polarizing film 112.Upper substrate 102 is transparency carrier, for example glass substrate with infrabasal plate 104.Between the upper substrate 102 and first light polarizing film 112, can comprise a phase retardation film (not shown), can make incident light produce differing of 90 degree or pi/2.
On the inside surface of infrabasal plate 104, just, have a reflection horizon 114, an insulation course 116 covering reflection horizon 114 and infrabasal plates 104 at reflector space 70 in the face of the surface of liquid crystal layer 106; Positive drive electrode 118 alternately is arranged on the insulation course 116 with negative drive electrode 119, and positive drive electrode 118 is parallel to infrabasal plate 104 with the direction of an electric field that negative drive electrode 119 forms; And one second both alignment layers 120 cover positive drive electrode 118 and negative drive electrode 119, the second both alignment layers 120 and just and between the negative drive electrode 118 alternative comprise an insulation course 122.The below of infrabasal plate 104 also comprises one second light polarizing film 124.Reflection horizon 114 can be a reflecting electrode.Between the infrabasal plate 104 and second light polarizing film 124, can comprise a phase retardation film (not shown), can make incident light backlight produce differing of 90 degree or pi/2. Insulation course 116 and 122 can be individual layer or multiple layer, and its material can be the formed multiple layer of silicon nitride, monox, silicon oxynitride or these materials.
The technology of the orientation configuration of second both alignment layers 120 can adopt light orientation (photo-alignment) technology, scraping (rubbing) technology, ion beam (ion-beam) technology, oblique evaporation or other feasible method, second both alignment layers 120 is carried out the single shaft parallel orientation handle, reach the purpose of liquid crystal molecule horizontal direction matching.As for, the characteristic of liquid crystal molecule (as: dielectric anisotropy, TN type, STN type) is not limited, and second both alignment layers 120 that can arrange in pairs or groups and handle through suitable orientation is with the special angle arrangement mode of control liquid crystal molecule in infrabasal plate 104 inboards.
110 of first both alignment layers of upper substrate 102 inboards are to adopt phtotpolymerizable compound (UV curable), utilize the technology of light orientation, make first both alignment layers 110 that is positioned at reflector space 70 reach the processing of vertical orientation or high angle orientation, for example can be 84 °, the purpose of orientation and first both alignment layers 110 that is positioned at penetration region 60 is up to the standard.First both alignment layers 110 of reflector space 70 and the orientation that 120 of second both alignment layers promptly form hybrid-alignment (Hybrid alignment) at this moment, 120 then orientations of first both alignment layers 110 of penetration region 60 and second both alignment layers for aiming at (Homogeneous alignment) in the same way.
Semi-reflection and semi-transparent display panel 2 is taked single liquid crystal cell structure design, presents the structure of sandwich form.Liquid crystal layer 106 is sandwiched between upper substrate 102 and the infrabasal plate 104.Wherein the manufacture method of semi-reflection and semi-transparent display panel 2 ties up to and forms reflecting electrode 114 on the infrabasal plate 104; plate the orientation rete behind insulating protective layer 116 and positive drive electrode 118 and the negative drive electrode 119; insert baking box baking tens of minutes; solidify on infrabasal plate 104 surfaces to reach the orientation rete; utilize light orientation (photo-alignment) technology after taking out; scraping (rubbing) technology; carrying out the processing of single shaft parallel orientation and forming second both alignment layers 120 of ion beam (ion-beam) technology reaches the purpose of the liquid crystal molecule horizontal direction matching that makes in the liquid crystal layer 106.102 of upper substrates are to form chromatic filter layer 108 to plate the orientation rete afterwards, insert baking box baking tens of minutes, and the orientation rete adopts photopolymerization (UV curable) macromolecular compound.Then, utilize the technology of light orientation on the orientation rete, to form different orientations and obtain first both alignment layers 110.The formation of orientation rete is to form photopolymerization object height molecular compound layer earlier on upper substrate 102, cover this photopolymerization object height molecular compound layer that is positioned at penetration region with a photoresist layer, and obtain first both alignment layers 110 with this photopolymerization object height molecular compound layer of this reflector space of UV-irradiation.
First both alignment layers 110 is the processing of vertical orientation or high angle orientation at reflector space 70, for example can be 84 °, then is horizontal direction matching in penetration region 60.At this moment, the orientation that promptly forms hybrid-alignment (Hybrid alignment) at reflector space 70 under the pairing of first both alignment layers 110 and second both alignment layers 120 is in the then formation orientation of aiming at (Homogeneous alignment) in the same way of penetration region 60.
After finishing the surface treatment of upper substrate 102 and infrabasal plate 104, bonding process promptly is to utilize UV glue to be coated on substrate edges, upper substrate 102 and infrabasal plate 10 are utilized the UV rayed after bonded to each other, make that two plate bases are bonded to each other, finish the step of making single liquid crystal cell structure.Afterwards, the liquid crystal that reinjects, for example linear liquid crystal, the single liquid crystal cell structure inside of entering, reflector space 70 and penetration region 60 thereby formation.Certainly, the present invention also can adopt the liquid crystal drip-injection method (One Drop Fill ODF), carries out the bonding mutually of 10 of upper substrate 102 and infrabasal plates behind the liquid crystal again in perfusion.
Owing to be that the present invention is the structure that adopts positive drive electrode 118 and negative drive electrode 119 levels to be arranged alternately, so apply electric field in semi-reflection and semi-transparent display panel 2 time, the liquid crystal of reflector space 70 can present the rotation that (In-plane Switching) switched in the isoplanar, and presents the result of bright attitude; Otherwise, if not during added electric field the liquid crystal in the reflector space 70 then become to mix and arrange 70 results that present dark attitude of reflector space.In addition, penetration region 60 is the orientation of aiming at (Homogeneous alignment) in the same way, thus not during making alive penetration region 60 be dark attitude; But after adding voltage, the liquid crystal molecule in the penetration region 60 begins to rotate 60 results that present bright attitude of penetration region.
Display panels disclosed in this invention is to utilize the mode that (In-plane Switching) switched in the isoplanar to control liquid crystal molecule, also only utilizes single liquid crystal cell to avoid trouble on the manufacture craft on the structure; And most important part promptly is by the collocation pattern that is controlled to be two both alignment layers between penetration region or reflector space, make the liquid crystal molecule in this two zone form different tilt angle (pretilt angle), make the penetrance-voltage curve of penetration region roughly overlap with the reflectivity-voltage curve of reflector space.
By the invention described above preferred embodiment as can be known, using the formed display panels of manufacture method disclosed in this invention is that (In-plane Switching) technology is switched in the utilization isoplanar, possess wide-visual angle effect, do not need extra wide viewing angle technology to improve viewing angle characteristic; And use the design of single cel-gap, thereby avoid two liquid crystal cell gap design complicated on manufacture craft and need to use single control circuit to carry out penetration region and reflector space making and controlling, can avoid increasing complicacy and the degree of difficulty and the type of drive complicated problems of array (Array); And, can reduce manufacturing cost because avoid the complexity of manufacture craft and the somewhat complex design of control circuit.
Though the present invention with a preferred embodiment openly as above; right its is not in order to qualification the present invention, any insider, without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking the appending claims person of defining.
Claims (13)
1. a display panels has to penetrate and presses territory and reflector space, comprising:
One upper substrate;
One infrabasal plate be arranged in parallel with this upper substrate;
One reflection horizon is positioned on this infrabasal plate of this reflector space;
One insulation course covers this infrabasal plate and this reflection horizon;
Positive drive electrode and negative drive electrode are crisscross arranged on this insulation course;
One first both alignment layers is positioned on the surface of this upper substrate between this upper and lower base plate, and this first both alignment layers forms different orientations in this penetration region and reflector space;
One second both alignment layers covers this reflection horizon and this insulation course, and this second both alignment layers is single orientation; And
One liquid crystal layer is between this first both alignment layers and this second both alignment layers.
2. display panels according to claim 1 is characterized in that, also comprises a light polarizing film, is positioned at the outside surface of this upper and lower substrate.
3. display panels according to claim 1 is characterized in that, wherein this of this penetration region first both alignment layers and the orientation of this second both alignment layers for aiming in the same way.
4. display panels according to claim 1 is characterized in that, wherein this of this reflector space first both alignment layers and this second both alignment layers orientation that is hybrid-alignment.
5. display panels according to claim 1 is characterized in that, wherein the material of this first both alignment layers is a photopolymerization object height molecular compound.
6. display panels according to claim 1 is characterized in that, wherein this reflection horizon is a reflecting electrode.
7. display panels according to claim 1 is characterized in that, wherein this insulation course can be the individual layer or the structure of multiple layer.
8. the manufacture method of a penetration reflecting type liquid crystal display panel, this penetration reflecting type liquid crystal display panel has penetration region and reflector space, comprising:
One upper substrate is provided;
Form one first both alignment layers on this upper substrate, comprise at least:
Form photopolymerization object height molecular compound layer on this upper substrate; And
Shine this photopolymerization object height molecular compound layer one ultraviolet light, form different orientations with this photopolymerization object height molecular compound layer at this penetration region and reflector space;
One infrabasal plate is provided;
Form a reflection horizon on this reflector space of this infrabasal plate;
Form an insulation course and cover this reflection horizon and this infrabasal plate;
Forming positive drive electrode and bearing drive electrode alternately is arranged on the insulation course;
Second both alignment layers that forms a single orientation covers this insulation course, this positive drive electrode and should bear drive electrode;
Encapsulate this upper substrate and this infrabasal plate with a UV glue, make this first both alignment layers relative with this second both alignment layers; And
The perfusion liquid crystal is between this first both alignment layers and this second both alignment layers.
9. the manufacture method of display panels according to claim 8 is characterized in that, the wherein orientation for aiming in the same way between this first both alignment layers of the orientation of this second both alignment layers and this penetration region.
10. the manufacture method of display panels according to claim 8 is characterized in that, is the orientation of hybrid-alignment between this first both alignment layers of the orientation of this second both alignment layers and this reflector space wherein.
11. the manufacture method of display panels according to claim 8 is characterized in that, the method that wherein forms this second both alignment layers orientation can be light alignment technique, wiper technology, ion beam technology or oblique evaporation technology.
12. the manufacture method of display panels according to claim 8 is characterized in that, the material that wherein forms this insulation course can be silicon nitride, monox or silicon oxynitride.
13. the manufacture method of display panels according to claim 8, it is characterized in that, wherein shining this photopolymerization object height molecular compound layer one ultraviolet light is to cover this photopolymerization object height molecular compound layer that is positioned at this penetration region with a photoresist layer, and with this photopolymerization object height molecular compound layer of this reflector space of UV-irradiation.
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| CN100458504C (en) * | 2006-03-16 | 2009-02-04 | 财团法人工业技术研究院 | Semi-reflection and semi-transparent type LCD and making method thereof |
| CN106019722B (en) | 2011-08-26 | 2019-05-17 | 夏普株式会社 | Liquid crystal display panel |
| CN103782230B (en) | 2011-08-29 | 2017-03-01 | 夏普株式会社 | The manufacture method of liquid crystal indicator |
| TWI693452B (en) * | 2018-10-04 | 2020-05-11 | 友達光電股份有限公司 | Liquid crystal device |
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| US20050157231A1 (en) * | 2004-01-16 | 2005-07-21 | Innolux Display Corp. | Transflective mode liquid crystal display |
| US20050190324A1 (en) * | 2004-02-27 | 2005-09-01 | Innolux Display Corp. | In-plane field type transflective liquid crystal display device |
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| US6836306B2 (en) * | 2000-09-27 | 2004-12-28 | Matsushita Electric Industrial Co., Ltd. | Transflective liquid crystal display device |
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