US20040239846A1 - Transflective liquid crystal display - Google Patents

Transflective liquid crystal display Download PDF

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Publication number
US20040239846A1
US20040239846A1 US10/250,018 US25001803A US2004239846A1 US 20040239846 A1 US20040239846 A1 US 20040239846A1 US 25001803 A US25001803 A US 25001803A US 2004239846 A1 US2004239846 A1 US 2004239846A1
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Prior art keywords
switching element
transflective lcd
region
pixel region
reflection
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Abandoned
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US10/250,018
Inventor
Chi-Jain Wen
Dai-Liang Ting
Hsiao-Yi Lin
Gwo-Long Lin
I-Wei Wu
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Innolux Corp
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Toppoly Optoelectronics Corp
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Priority to US10/250,018 priority Critical patent/US20040239846A1/en
Assigned to TOPPOLY OPTOELECTRONICS CORP. reassignment TOPPOLY OPTOELECTRONICS CORP. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WU, I-WEI, LIN, GWO-LONG, LIN, HSIAO-YI, TING, DAI-LIANG, WEN, CHI-JAIN
Publication of US20040239846A1 publication Critical patent/US20040239846A1/en
Priority to US10/907,053 priority patent/US7002652B2/en
Assigned to TPO DISPLAYS CORP. reassignment TPO DISPLAYS CORP. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: TOPPOLY OPTOELECTRONICS CORPORATION
Assigned to CHIMEI INNOLUX CORPORATION reassignment CHIMEI INNOLUX CORPORATION MERGER (SEE DOCUMENT FOR DETAILS). Assignors: TPO DISPLAYS CORP.
Assigned to Innolux Corporation reassignment Innolux Corporation CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: CHIMEI INNOLUX CORPORATION
Abandoned legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133553—Reflecting elements
    • G02F1/133555—Transflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/13624—Active matrix addressed cells having more than one switching element per pixel

Definitions

  • the present invention relates to a liquid crystal display (LCD), and more particularly to a transflective LCD.
  • LCD liquid crystal display
  • LCDs have been popularly applied to various IT products such as notebooks, personal digital assistants (PDAs), and cellular phones. Since LCDs are passive luminous devices, an external light source is required. According to different types of external light sources, LCDs are generally classified into reflective LCDs, transmissive LCDs, and transflective LCDs. In a reflective LCD, an external light in front of the panel enters the panel, and is reflected by a reflective layer (such as a aluminum layer) so that users can see what the LCD displays on the screen. In a transmissive LCD, a back light module is installed behind the panel for radiating light, and the radiating light will pass through the panel so that users can see what the LCD displays on the screen. In a transflective LCD, an external light and a back light module are used simultaneously as light sources to illuminate the transflective LCD.
  • a reflective LCD an external light in front of the panel enters the panel, and is reflected by a reflective layer (such as a aluminum layer) so that users can see what the LCD displays on the screen.
  • FIG. 1 is a schematic diagram of a pixel region 100 of a prior art transflective LCD, wherein the pixel region 100 is a red color, green color, or blue color pixel region.
  • the pixel region 100 comprises a reflection pixel region 110 and a transmission region 120 , wherein the reflection pixel region 110 includes a reflective electrode (not shown), and the transmission pixel region 120 comprises a transmissive electrode (not shown).
  • the transmissive electrode (not shown) and the reflective electrode of a pixel region are connected to a pixel driving circuit 101 controlled by a scan line SL 1 and a data line DL 1 , and the luminance of the transmission pixel and the reflective pixel are controlled by the pixel driving circuit 101 simultaneously.
  • the transmission mode of the prior art transflective LCD uses an internal back light module, while the reflection mode uses an external light.
  • a pixel driving circuit is used to control both a transmission pixel region and a reflection pixel region in the same pixel region, so only the transmission region or the reflection region can be controlled to its best color display. Therefore the total color display of the transflective LCD is reduced.
  • the transflective LCD comprises a reflection region and a transmission region installed in a pixel region.
  • the reflection region includes a reflective electrode connected to a first switching element
  • the transmission region comprises a transmissive electrode connected to a second switching element, wherein the first switching element and the second switching element respectively control the function of reflection mode and transmission mode.
  • FIG. 1 is a schematic diagram of a pixel region of a prior art transflective LCD.
  • FIG. 2 to FIG. 5 are schematic diagrams of a pixel region of a transflective LCD along the radiation direction of a back light module in the first embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a pixel region of a transflective LCD along the radiation direction of a back light module in the second embodiment of the present invention.
  • FIG. 7 to FIG. 10 are schematic diagrams of a pixel region of a transflective LCD along the radiation direction of a back light module in the third embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a pixel region of a transflective LCD along the radiation direction of a back light module in the fourth embodiment of the present invention.
  • FIG. 12 to FIG. 17 are cross-section diagrams of a transflective LCD of the present invention.
  • FIG. 2 is a schematic diagram of a pixel region 200 of a transflective LCD along the radiation direction of a back light module in the first embodiment of the present invention, wherein the pixel region 200 is a red color pixel region, a green color pixel region, or a blue color pixel region.
  • the pixel region 200 includes a reflection region 210 and a transmission region 220 , the luminance of the reflection region 210 is controlled by a first switching element 201 , and the luminance of the transmission region 220 is controlled by a second switching element 202 .
  • the switching elements 201 and 202 can be driving circuits sharing a scan line SL 1 , connect to data lines DL 1 and DL 2 by contact holes 203 and 204 , and receive image data signals from data lines DL 1 and DL 2 respectively. Furthermore, the first switching element 201 is connected to a reflective electrode (not shown) by a contact hole 205 for controlling the luminance of the reflection region 210 , and the second switching element 202 is connected to a transmissive electrode (not shown) by a contact hole 206 for controlling the luminance of the transmission region 220 . In this embodiment of the present invention, the data line DL 1 , DL 2 and the switching element 201 , 202 are located below the reflection region 210 for not affecting the aperture ratio. It is worth noticing that the relative location and ratio of the reflection pixel region and the transmission pixel region can be modified according to circuit designs as shown in FIG. 3, FIG. 4, and FIG. 5.
  • FIG. 6 is a schematic diagram of a pixel region 230 of a transflective LCD along the radiation direction of a back light module in the second embodiment of the present invention, wherein the pixel region 230 is a red color pixel region, a green color pixel region, or a blue color pixel region.
  • the pixel region 230 includes a reflection region 240 and a transmission region 250 , the luminance of the reflection region 230 is controlled by a first switching element 231 , and the luminance of the transmission region 250 is controlled by a second switching element 232 .
  • the switching elements 231 and 232 are driving circuits sharing a scan line SL 1 , connect to data lines DL 12 and DL 21 by contact holes 233 and 234 , and receive image data signals from data lines DL 12 and DL 21 respectively. Furthermore, the first switching element 231 is connected to a reflective electrode (not shown) by a contact hole 235 for controlling the luminance of the reflection region 240 , and the second switching element 232 is connected to a transmissive electrode (not shown) by a contact hole 236 for controlling the luminance of the transmission region 250 .
  • the data line DL 12 and the first switching element 231 are located below the reflection region 240 , while the data line DL 21 and the second switching element 232 are located below a reflection pixel region of a neighboring pixel region for not affecting the aperture ratio.
  • FIG. 7 is a schematic diagram of a pixel region 300 of a transflective LCD along the radiation direction of a back light module in the third embodiment of the present invention, wherein the pixel region 300 is a red color pixel region, a green color pixel region, or a blue color pixel region.
  • the pixel region 300 includes a reflection region 310 and a transmission region 320 , the luminance of the reflection region 310 is controlled by a first switching element 301 , and the luminance of the transmission region 320 is controlled by a second switching element 302 .
  • the switching elements 301 and 302 are respectively connected to a data line DL 1 by contact holes 303 and 304 .
  • the first switching element 301 is connected to a reflective electrode (not shown) by a contact hole 305 , and the reflective electrode (not shown) receives a signal from the scan line SL 1 to switch the reflection region 310 .
  • the second switching element 302 is connected to a transmissive electrode (not shown) by a contact hole 306 , and the transmissive electrode (not shown) receives a signal from the scan line SL 2 to switch the transmission region 320 .
  • the scan lines SL 1 , SL 2 and the switching elements 301 , 302 are located below the reflection region 310 for not affecting the aperture ratio. It is worth noticing that the relative location and ratio of the reflection pixel region and the transmission pixel region can be modified according to circuit designs as shown in FIG. 8, FIG. 9, and FIG. 10.
  • FIG. 11 is a schematic diagram of a pixel region 350 of a transflective LCD along the radiation direction of a back light module in the fourth embodiment of the present invention, wherein the pixel region 350 is a red color pixel region, a green color pixel region, or a blue color pixel region.
  • the pixel region 350 includes a reflection region 360 and a transmission region 370 , the luminance of the reflection region 360 is controlled by a first switching element 351 , and the luminance of the transmission region 370 is controlled by a second switching element 352 .
  • the switching elements 351 and 352 are respectively connected to a data line DL 1 by contact holes 353 and 354 .
  • the first switching element 351 is connected to a reflective electrode (not shown) by a contact hole 355 , and the reflective electrode (not shown) receives a signal from the scan line SL 1 to switch the reflection region 360 .
  • the second switching element 352 is connected to a transmissive electrode (not shown) by a contact hole 356 , and the transmissive electrode (not shown) receives a signal from the scan line SL 2 to switch the transmission region 370 .
  • the scan lines SL 1 and the first switching element 351 are located below the reflection region 360
  • the scan line SL 2 and the second switching element 352 are located below a reflection pixel region of a neighboring pixel region for not affecting the aperture ratio.
  • FIG. 12 to FIG. 17 are cross-section diagrams of a transflective LCD 400 of the present invention.
  • the transflective LCD 400 comprises a reflective electrode 410 , a transmissive electrode 420 , a first switching element 401 , and a second switching element 402 .
  • the first switching element 401 is connected to a data line by a via hole 403 and is connected to the reflective electrode 410 by a via hole 405
  • the second switching element 402 is connected to a data line by a via hole 404 .
  • the material of the transmissive electrode 420 can be doped or non-doped polysilicon, or doped or non-doped amorphous silicon. Furthermore, the transmissive electrode 420 can be connected directly to an active layer (source/drain) of the second switching element 402 as shown in FIG. 12 and FIG. 13, or the transmissive electrode 420 can be connected to the active layer of the second switching element 402 by the via hole 406 as shown in FIG. 14. Additionally, the transmissive electrode 420 can be an ITO or an IZO material, and is connected to the second switching element 402 by a via hole 406 , wherein the location of the transmissive electrode 420 can be modified as shown in FIG. 15 to FIG. 17. As shown in FIG.
  • the transmissive electrode 420 is located on the bottom layer of the second switching element 402 . As shown in FIG. 16, the transmissive electrode 420 and the scan line are located in the same layer. As shown in FIG. 17, the transmissive electrode 420 and the data line are located in the same layer.

Abstract

A transflective liquid crystal display (LCD) includes at least a transmission pixel region and at least a reflection pixel region positioned in a pixel region. The transmission region includes at least a transmissive electrode connected to a first switching element. The reflection pixel region includes at least a reflective electrode connected to a second switching element. The transmissive and the reflective electrodes are controlled respectively by independent switching elements.

Description

    BACKGROUND OF INVENTION
  • 1. Field of the Invention [0001]
  • The present invention relates to a liquid crystal display (LCD), and more particularly to a transflective LCD. [0002]
  • 2. Description of the Prior Art [0003]
  • LCDs have been popularly applied to various IT products such as notebooks, personal digital assistants (PDAs), and cellular phones. Since LCDs are passive luminous devices, an external light source is required. According to different types of external light sources, LCDs are generally classified into reflective LCDs, transmissive LCDs, and transflective LCDs. In a reflective LCD, an external light in front of the panel enters the panel, and is reflected by a reflective layer (such as a aluminum layer) so that users can see what the LCD displays on the screen. In a transmissive LCD, a back light module is installed behind the panel for radiating light, and the radiating light will pass through the panel so that users can see what the LCD displays on the screen. In a transflective LCD, an external light and a back light module are used simultaneously as light sources to illuminate the transflective LCD. [0004]
  • Please refer to FIG. 1. FIG. 1 is a schematic diagram of a [0005] pixel region 100 of a prior art transflective LCD, wherein the pixel region 100 is a red color, green color, or blue color pixel region. As shown in FIG. 1, the pixel region 100 comprises a reflection pixel region 110 and a transmission region 120, wherein the reflection pixel region 110 includes a reflective electrode (not shown), and the transmission pixel region 120 comprises a transmissive electrode (not shown). The transmissive electrode (not shown) and the reflective electrode of a pixel region are connected to a pixel driving circuit 101 controlled by a scan line SL1 and a data line DL1, and the luminance of the transmission pixel and the reflective pixel are controlled by the pixel driving circuit 101 simultaneously.
  • The transmission mode of the prior art transflective LCD uses an internal back light module, while the reflection mode uses an external light. However, in the prior art a pixel driving circuit is used to control both a transmission pixel region and a reflection pixel region in the same pixel region, so only the transmission region or the reflection region can be controlled to its best color display. Therefore the total color display of the transflective LCD is reduced. [0006]
    • SUMMARY OF INVENTION
  • It is therefore a primary objective of the claimed invention to provide a transflective LCD using two independent switching elements to control the transmission pixel region and the reflection pixel region so that both the transmission mode and the reflection mode can achieve best color display with any light sources. [0007]
  • According to the claimed invention, the transflective LCD comprises a reflection region and a transmission region installed in a pixel region. The reflection region includes a reflective electrode connected to a first switching element, and the transmission region comprises a transmissive electrode connected to a second switching element, wherein the first switching element and the second switching element respectively control the function of reflection mode and transmission mode. [0008]
  • It is an advantage of the claimed invention that the best color display of the transflective LCD can be achieved because the luminance of the reflection region and the transmission region are controlled separately by the first switching element and the second switching element. [0009]
  • These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after having read the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.[0010]
    • BRIEF DESCRIPTION OF DRAWINGS
  • FIG. 1 is a schematic diagram of a pixel region of a prior art transflective LCD. [0011]
  • FIG. 2 to FIG. 5 are schematic diagrams of a pixel region of a transflective LCD along the radiation direction of a back light module in the first embodiment of the present invention. [0012]
  • FIG. 6 is a schematic diagram of a pixel region of a transflective LCD along the radiation direction of a back light module in the second embodiment of the present invention. [0013]
  • FIG. 7 to FIG. 10 are schematic diagrams of a pixel region of a transflective LCD along the radiation direction of a back light module in the third embodiment of the present invention. [0014]
  • FIG. 11 is a schematic diagram of a pixel region of a transflective LCD along the radiation direction of a back light module in the fourth embodiment of the present invention. [0015]
  • FIG. 12 to FIG. 17 are cross-section diagrams of a transflective LCD of the present invention.[0016]
    • DETAILED DESCRIPTION
  • Please refer to FIG. 2. FIG. 2 is a schematic diagram of a [0017] pixel region 200 of a transflective LCD along the radiation direction of a back light module in the first embodiment of the present invention, wherein the pixel region 200 is a red color pixel region, a green color pixel region, or a blue color pixel region. As shown in FIG. 2, the pixel region 200 includes a reflection region 210 and a transmission region 220, the luminance of the reflection region 210 is controlled by a first switching element 201, and the luminance of the transmission region 220 is controlled by a second switching element 202. The switching elements 201 and 202 can be driving circuits sharing a scan line SL1, connect to data lines DL1 and DL2 by contact holes 203 and 204, and receive image data signals from data lines DL1 and DL2 respectively. Furthermore, the first switching element 201 is connected to a reflective electrode (not shown) by a contact hole 205 for controlling the luminance of the reflection region 210, and the second switching element 202 is connected to a transmissive electrode (not shown) by a contact hole 206 for controlling the luminance of the transmission region 220. In this embodiment of the present invention, the data line DL1, DL2 and the switching element 201, 202 are located below the reflection region 210 for not affecting the aperture ratio. It is worth noticing that the relative location and ratio of the reflection pixel region and the transmission pixel region can be modified according to circuit designs as shown in FIG. 3, FIG. 4, and FIG. 5.
  • Please refer to FIG. 6. FIG. 6 is a schematic diagram of a [0018] pixel region 230 of a transflective LCD along the radiation direction of a back light module in the second embodiment of the present invention, wherein the pixel region 230 is a red color pixel region, a green color pixel region, or a blue color pixel region. As shown in FIG. 6, the pixel region 230 includes a reflection region 240 and a transmission region 250, the luminance of the reflection region 230 is controlled by a first switching element 231, and the luminance of the transmission region 250 is controlled by a second switching element 232. The switching elements 231 and 232 are driving circuits sharing a scan line SL1, connect to data lines DL12 and DL21 by contact holes 233 and 234, and receive image data signals from data lines DL12 and DL21 respectively. Furthermore, the first switching element 231 is connected to a reflective electrode (not shown) by a contact hole 235 for controlling the luminance of the reflection region 240, and the second switching element 232 is connected to a transmissive electrode (not shown) by a contact hole 236 for controlling the luminance of the transmission region 250. In this embodiment of the present invention, the data line DL12 and the first switching element 231 are located below the reflection region 240, while the data line DL21 and the second switching element 232 are located below a reflection pixel region of a neighboring pixel region for not affecting the aperture ratio.
  • Please refer to FIG. 7. FIG. 7 is a schematic diagram of a [0019] pixel region 300 of a transflective LCD along the radiation direction of a back light module in the third embodiment of the present invention, wherein the pixel region 300 is a red color pixel region, a green color pixel region, or a blue color pixel region. As shown in FIG. 7, the pixel region 300 includes a reflection region 310 and a transmission region 320, the luminance of the reflection region 310 is controlled by a first switching element 301, and the luminance of the transmission region 320 is controlled by a second switching element 302. The switching elements 301 and 302 are respectively connected to a data line DL1 by contact holes 303 and 304. Furthermore, the first switching element 301 is connected to a reflective electrode (not shown) by a contact hole 305, and the reflective electrode (not shown) receives a signal from the scan line SL1 to switch the reflection region 310. The second switching element 302 is connected to a transmissive electrode (not shown) by a contact hole 306, and the transmissive electrode (not shown) receives a signal from the scan line SL2 to switch the transmission region 320. In this embodiment of the present invention, the scan lines SL1, SL2 and the switching elements 301, 302 are located below the reflection region 310 for not affecting the aperture ratio. It is worth noticing that the relative location and ratio of the reflection pixel region and the transmission pixel region can be modified according to circuit designs as shown in FIG. 8, FIG. 9, and FIG. 10.
  • Please refer to FIG. 11. FIG. 11 is a schematic diagram of a [0020] pixel region 350 of a transflective LCD along the radiation direction of a back light module in the fourth embodiment of the present invention, wherein the pixel region 350 is a red color pixel region, a green color pixel region, or a blue color pixel region. As shown in FIG. 11, the pixel region 350 includes a reflection region 360 and a transmission region 370, the luminance of the reflection region 360 is controlled by a first switching element 351, and the luminance of the transmission region 370 is controlled by a second switching element 352. The switching elements 351 and 352 are respectively connected to a data line DL1 by contact holes 353 and 354. Furthermore, the first switching element 351 is connected to a reflective electrode (not shown) by a contact hole 355, and the reflective electrode (not shown) receives a signal from the scan line SL1 to switch the reflection region 360. The second switching element 352 is connected to a transmissive electrode (not shown) by a contact hole 356, and the transmissive electrode (not shown) receives a signal from the scan line SL2 to switch the transmission region 370. In this embodiment of the present invention, the scan lines SL1 and the first switching element 351 are located below the reflection region 360, while the scan line SL2 and the second switching element 352 are located below a reflection pixel region of a neighboring pixel region for not affecting the aperture ratio.
  • All embodiments of the present invention can be modified as follows. Please refer to FIG. 12 to FIG. 17. FIG. 12 to FIG. 17 are cross-section diagrams of a [0021] transflective LCD 400 of the present invention. As shown in FIG. 12 to FIG. 14, the transflective LCD 400 comprises a reflective electrode 410, a transmissive electrode 420, a first switching element 401, and a second switching element 402. The first switching element 401 is connected to a data line by a via hole 403 and is connected to the reflective electrode 410 by a via hole 405, and the second switching element 402 is connected to a data line by a via hole 404. The material of the transmissive electrode 420 can be doped or non-doped polysilicon, or doped or non-doped amorphous silicon. Furthermore, the transmissive electrode 420 can be connected directly to an active layer (source/drain) of the second switching element 402 as shown in FIG. 12 and FIG. 13, or the transmissive electrode 420 can be connected to the active layer of the second switching element 402 by the via hole 406 as shown in FIG. 14. Additionally, the transmissive electrode 420 can be an ITO or an IZO material, and is connected to the second switching element 402 by a via hole 406, wherein the location of the transmissive electrode 420 can be modified as shown in FIG. 15 to FIG. 17. As shown in FIG. 15, the transmissive electrode 420 is located on the bottom layer of the second switching element 402. As shown in FIG. 16, the transmissive electrode 420 and the scan line are located in the same layer. As shown in FIG. 17, the transmissive electrode 420 and the data line are located in the same layer.
  • Those skilled in the art will readily observe that numerous modifications and alterations of the device may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims. [0022]

Claims (20)

What is claimed is:
1. A transflective liquid crystal display (LCD) including at least a reflection region and a transmission region positioned in a pixel region of the transflective liquid crystal display, wherein the reflection region includes at least a reflective electrode connected to a first switching element, and the transmission region includes at least a transmissive electrode connected to a second switching element.
2. The transflective LCD of claim 1, wherein the pixel region is a red color pixel region.
3. The transflective LCD of claim 1, wherein the pixel region is a green color pixel region.
4. The transflective LCD of claim 1, wherein the pixel region is a blue color pixel region.
5. The transflective LCD of claim 1, wherein the first switching element is used to control a reflection mode of the transflective LCD, and the second switching element is used to control a transmission mode of the transflective LCD.
6. The transflective LCD of claim 5, wherein the reflection mode and the transmission mode are operated individually or cooperatively to achieve best display effect.
7. The transflective LCD of claim 1, wherein the first switching element and the second switching element share a scan line.
8. The transflective LCD of claim 7, wherein the first switching element is connected to a first data line and uses the first data line to send a signal to the reflection region for controlling the brightness of the reflection region, and the second switching element is connected to a second data line and uses the second data line to send a signal to the transmission region for controlling the brightness of the transmission region.
9. The transflective LCD of claim 1, wherein the first switching element and the second switching element share a data line.
10. The transflective LCD of claim 9, wherein the first switching element is connected to a first scan line to send a signal to the reflection region for switching the reflection region, and the second switching element is connected to a second scan line to send a signal to the transmission region for switching the transmission region.
11. The transflective LCD of claim 1, wherein the second switching element is located under the reflective electrode to avoid affecting the aperture ratio of the transflective LCD.
12. The transflective LCD of claim 1, wherein the reflective electrode includes metal or materials having good conductivity.
13. The transflective LCD of claim 1, wherein the transmissive electrode includes silicon.
14. The transflective LCD of claim 13, wherein the transmissive electrode is connected to an active layer of the second switching element.
15. The transflective LCD of claim 13, wherein the transmissive electrode includes doped polysilicon or doped amorphous silicon.
16. The transflective LCD of claim 1, wherein the transmissive electrode includes non-doped polysilicon or non-doped amorphous silicon.
17. The transflective LCD of claim 1, wherein the transmissive electrode includes ITO (indium tin oxide) or IZO (indium zinc oxide).
18. The transflective LCD of claim 17, wherein the transmissive electrode is located in a bottom layer of the second switching element.
19. The transflective LCD of claim 17, wherein the transmissive electrode and the scan line are located in the same layer.
20. The transflective LCD of claim 17, wherein the transmissive electrode and the data line are located in the same layer.
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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040201560A1 (en) * 2003-04-09 2004-10-14 Industrial Technology Research Institute Method for driving transflective liquid crystal display
US20040227877A1 (en) * 2003-05-12 2004-11-18 Lg. Philips Lcd Co., Ltd. Liquid crystal display device and method of fabricating the same
US20050018114A1 (en) * 2003-06-11 2005-01-27 Lg. Philips Lcd., Ltd. Transflective liquid crystal display and method of fabricating the same
US20050018113A1 (en) * 2003-07-25 2005-01-27 Yuh-Ren Shen Pixel structure
US20050213002A1 (en) * 2004-03-24 2005-09-29 Toppoly Optoelectronics Corp. Transflective liquid crystal display and method of fabricating the same
US20070195241A1 (en) * 2006-02-17 2007-08-23 Samsung Electronics Co., Ltd. Display panel having substrate with improved aperture ratio
US20080180614A1 (en) * 2007-01-26 2008-07-31 Samsung Electronics Co., Ltd. Transflective liquid crystal and manufacturing method thereof
US20080239227A1 (en) * 2007-03-27 2008-10-02 Au Optronics Corporation Pixel Structure, Display Panel, Electro-Optical Device, and Method for Manufacturing the Same
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US20080316402A1 (en) * 2007-06-20 2008-12-25 Au Optronics Corp. Display Panel, Electro-Optical Device, and Methods for Fabricating the Same
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EP2878995A4 (en) * 2012-07-27 2016-06-01 Boe Technology Group Co Ltd Blue-phase liquid crystal panel and display device
US20220179252A1 (en) * 2016-03-17 2022-06-09 Japan Display Inc. Display device
US20220179256A1 (en) * 2016-07-29 2022-06-09 Japan Display Inc. Display device
US11428982B2 (en) * 2018-07-04 2022-08-30 Sony Corporation Electrode structure, method for manufacturing electrode structure, liquid crystal display element, method for driving liquid crystal display element, and electronic equipment

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7495258B2 (en) * 2006-05-17 2009-02-24 Tpo Displays Corp. N-channel TFT and OLED display apparatus and electronic device using the same
KR101281918B1 (en) * 2006-05-17 2013-07-03 엘지디스플레이 주식회사 Diode Substrate of Transflective Type And Method for Fabricating The Same
KR101407285B1 (en) * 2006-05-22 2014-06-13 엘지디스플레이 주식회사 Liquid Crystal Display Device and Method for Driving the Same
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US9766495B2 (en) 2014-09-23 2017-09-19 Innolux Corporation Transflective type liquid crystal panel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5471330A (en) * 1993-07-29 1995-11-28 Honeywell Inc. Polysilicon pixel electrode
US20020054269A1 (en) * 2000-11-07 2002-05-09 Seiko Epson Corporation Liquid crystal display and electronic appliance
US20030133059A1 (en) * 2002-01-15 2003-07-17 Chi Mei Optoelectronics Corp. Liquid crystal display device
US20040004685A1 (en) * 2002-07-03 2004-01-08 Fang-Chen Luo [thin-film transistor array substrate]

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW594630B (en) * 2002-03-28 2004-06-21 Ind Tech Res Inst Transreflective liquid crystal display
KR100439354B1 (en) * 2002-07-08 2004-07-07 엘지.필립스 엘시디 주식회사 Transflective LCD

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5471330A (en) * 1993-07-29 1995-11-28 Honeywell Inc. Polysilicon pixel electrode
US20020054269A1 (en) * 2000-11-07 2002-05-09 Seiko Epson Corporation Liquid crystal display and electronic appliance
US20030133059A1 (en) * 2002-01-15 2003-07-17 Chi Mei Optoelectronics Corp. Liquid crystal display device
US20040004685A1 (en) * 2002-07-03 2004-01-08 Fang-Chen Luo [thin-film transistor array substrate]

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7009592B2 (en) * 2003-04-09 2006-03-07 Industrial Technology Research Institute Method for driving transflective liquid crystal display
US20040201560A1 (en) * 2003-04-09 2004-10-14 Industrial Technology Research Institute Method for driving transflective liquid crystal display
US20040227877A1 (en) * 2003-05-12 2004-11-18 Lg. Philips Lcd Co., Ltd. Liquid crystal display device and method of fabricating the same
US7567329B2 (en) 2003-05-12 2009-07-28 Lg Display Co., Ltd. Liquid crystal display device and method of fabricating the same
US7072012B2 (en) * 2003-05-12 2006-07-04 Lg.Philips Lcd Co., Ltd. Liquid crystal display device including data line divided into first and second branch lines and method of fabricating the same
US20060221279A1 (en) * 2003-05-12 2006-10-05 Lg. Philips Lcd Co., Ltd. Liquid crystal display device and method of fabricating the same
US7280174B2 (en) * 2003-06-11 2007-10-09 Lg Philips Lcd Co., Ltd. Transflective liquid crystal display and method of fabricating the same
US20050018114A1 (en) * 2003-06-11 2005-01-27 Lg. Philips Lcd., Ltd. Transflective liquid crystal display and method of fabricating the same
US20050018113A1 (en) * 2003-07-25 2005-01-27 Yuh-Ren Shen Pixel structure
US7119761B2 (en) * 2003-07-25 2006-10-10 Chi Mei Optoelectronics Corp. Pixel structure
US20050213002A1 (en) * 2004-03-24 2005-09-29 Toppoly Optoelectronics Corp. Transflective liquid crystal display and method of fabricating the same
US7480020B2 (en) * 2004-03-24 2009-01-20 Tpo Displays Corp. Transflective liquid crystal display and method of fabricating the same
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US20070195241A1 (en) * 2006-02-17 2007-08-23 Samsung Electronics Co., Ltd. Display panel having substrate with improved aperture ratio
US20080180614A1 (en) * 2007-01-26 2008-07-31 Samsung Electronics Co., Ltd. Transflective liquid crystal and manufacturing method thereof
US8023076B2 (en) 2007-01-26 2011-09-20 Samsung Electronics Co., Ltd. Transflective liquid crystal and manufacturing method thereof
US20080239227A1 (en) * 2007-03-27 2008-10-02 Au Optronics Corporation Pixel Structure, Display Panel, Electro-Optical Device, and Method for Manufacturing the Same
US20080316402A1 (en) * 2007-06-20 2008-12-25 Au Optronics Corp. Display Panel, Electro-Optical Device, and Methods for Fabricating the Same
US7728930B2 (en) 2007-06-20 2010-06-01 Au Optronics Corp. Display panel, electro-optical device, and methods for fabricating the same
JP2016026312A (en) * 2009-12-28 2016-02-12 株式会社半導体エネルギー研究所 Liquid crystal display device
US10347197B2 (en) 2009-12-28 2019-07-09 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device and electronic device
US10861401B2 (en) 2009-12-28 2020-12-08 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device and electronic device configured to operate at two different refresh ratees
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US20220179252A1 (en) * 2016-03-17 2022-06-09 Japan Display Inc. Display device
US11914237B2 (en) * 2016-03-17 2024-02-27 Japan Display Inc. Display device
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