WO2004063802A1 - Agencement de pixels transflectif - Google Patents
Agencement de pixels transflectif Download PDFInfo
- Publication number
- WO2004063802A1 WO2004063802A1 PCT/CN2003/000012 CN0300012W WO2004063802A1 WO 2004063802 A1 WO2004063802 A1 WO 2004063802A1 CN 0300012 W CN0300012 W CN 0300012W WO 2004063802 A1 WO2004063802 A1 WO 2004063802A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pixel electrode
- pixel structure
- electrode
- substrate
- pixel
- Prior art date
Links
Classifications
-
- 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
-
- 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
-
- 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
- G02F1/136213—Storage capacitors associated with the pixel electrode
-
- 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
- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
Definitions
- the present invention relates to a pixel structure of a thin film transistor liquid crystal display, and more particularly to a semi-transmissive and semi-reflective pixel structure. Background technique
- the thin film transistor liquid crystal display is mainly composed of a thin film transistor array substrate, a color filter array substrate, and a liquid crystal layer.
- the thin film transistor array substrate is composed of a plurality of pixel structures arranged in an array.
- the above thin film transistor includes a gate electrode, a channel layer, a drain electrode, and a source electrode.
- the thin film transistor is used as a switching component of a liquid crystal display unit.
- FIG. 1 is a schematic top view of a conventional pixel structure.
- FIG. 2 is a schematic cross-sectional view taken along line I- ⁇ in FIG. 1.
- a gate 102 and a scan wiring 101 are first formed on a substrate 100, and the scan wiring 101 is connected to the gate 102.
- a gate dielectric layer 104 is formed on the substrate 100 to cover the gate electrode 102 and the scan wiring 101.
- an amorphous silicon channel layer 106 is formed on the gate dielectric layer 104 above the gate electrode 102, and an ohmic contact layer 108 is formed on the amorphous silicon channel layer 106.
- a source / drain 112a / 112b is formed on the ohmic contact layer 108, and a data wiring 111 connected to the source 112a is defined on the gate dielectric layer 104, wherein the gate 102 and the channel layer 106
- a thin film transistor 130 is formed with the source / drain 112a / 112b.
- a protective layer 114 is formed on the substrate 100 to cover the thin film transistor 130, and the protective layer 114 is patterned to form an opening 116 in the protective layer 114.
- a pixel electrode 118 is formed on the protective layer 114. The pixel electrode 118 is electrically connected to the drain 112b of the thin film transistor 130 through the opening 116.
- a scan wiring 101a adjacent to the pixel structure The upper part further includes a pixel storage capacitor 120 formed by a scan wiring 101a (as a lower electrode), a conductive layer 124 and a pixel electrode 118 (as an upper electrode) corresponding to the scan wiring 101a, and formed on the lower
- the gate dielectric layer 104 is formed between the electrode and the upper electrode.
- the conductive layer 124 and the pixel electrode 118 are electrically connected through a slit 126 formed in the protective layer 114.
- the thin film transistor 130 of the existing pixel structure is disposed at a corner of the pixel structure to drive the entire pixel structure, and the pixel storage capacitor 120 is disposed above the other scanning wiring 101a. Therefore, the design of such a pixel structure is susceptible to failure due to the effects of process contamination particles. That is, if the contamination particles are attached to a certain position of the pixel structure and cause defects such as a short circuit, the entire pixel structure may not operate normally.
- the structure of the existing pixel storage capacitor 120 disposed on the scanning wiring 101a requires more than one level of design for the scanning waveform, so the design and manufacturing process of the driving circuit will be more complicated.
- an object of the present invention is to provide a semi-transmissive and semi-reflective pixel structure, so as to solve the problems that would occur in the existing configuration of the pixel structure.
- Another object of the present invention is to provide a transflective pixel structure, so that both the transmissive and reflective structures can exist in a pixel structure at the same time.
- the present invention proposes a transflective pixel structure suitable for being constructed on a substrate.
- the transflective pixel structure includes a scanning wiring, a gate dielectric layer, a data wiring, A protective layer, a transparent pixel electrode, a reflective pixel electrode, and a double drain thin film transistor (Double Drain TFT).
- the scanning wiring is disposed on the substrate, and the gate dielectric layer is disposed on the substrate and covers the scanning wiring.
- the data wiring is arranged on the gate dielectric layer, and the extending direction of the data wiring is different from the extending direction of the scanning wiring.
- the protective layer is arranged on a part of the gate dielectric layer and covers the data wiring.
- the transparent pixel electrode is disposed on the protective layer, and the transparent pixel electrode located above the scanning wiring has a plurality of openings to reduce the parasitic capacitance between the scanning wiring and the transparent pixel electrode.
- the reflective pixel electrode is disposed on the exposed gate dielectric layer, and the areas of the reflective pixel electrode and the transparent pixel electrode may be equal or different.
- the double-drain thin-film transistor is disposed on a substrate, and the double-drain thin-film transistor is disposed in the center of the pixel structure.
- the double-drain thin-film transistor has a gate, a channel layer, a source, and two drains.
- the source is electrically connected to the data wiring
- the two drains are electrically connected to the transparent pixel electrode and the reflective pixel electrode, respectively.
- the channel layer is disposed on the interlayer dielectric layer above the gate, and the source and the two drain electrodes are disposed on the channel layer.
- the gate is electrically connected to the scanning wiring.
- two edges of the transflective pixel structure further include a first pixel storage capacitor and a second pixel storage capacitor, respectively.
- the first pixel storage capacitor is formed by a A first shared line (as a lower electrode), a conductive layer and a transparent pixel electrode (as an upper electrode) correspondingly disposed above the first shared line, and a gate dielectric layer disposed between the upper and lower electrodes, The conductive layer and the transparent pixel electrode are electrically connected to each other through a contact window disposed in the protective layer.
- the second pixel storage capacitor includes a second shared line (as a lower electrode) disposed on the substrate, a reflective pixel electrode (as an upper electrode) correspondingly disposed above the second shared line, and upper and lower electrodes. It consists of a gate dielectric layer.
- the present invention has both a transmissive and a reflective structure in a pixel structure, such a pixel structure has the advantages of a semi-transmissive and semi-reflective liquid crystal display, such as power saving, used in a liquid crystal display.
- the pixel structure of the present invention is less affected by the process particles and causes the entire The pixel structure does not work properly.
- the thin film transistor is disposed at the center of the pixel structure, so that the electric field distribution on the pixel electrode can be made more uniform, so this configuration method has a positive effect on display. Since the pixel storage capacitor in the pixel structure of the present invention is not disposed above the scan wiring as in the prior art, the design of the driving circuit of the present invention is simpler than that of the existing pixel structure.
- FIG. 1 is a schematic top view of a conventional pixel structure
- FIG. 2 is a schematic cross-sectional view taken along I- ⁇ in FIG. 1;
- FIG. 3 is a schematic top view of a pixel structure according to a preferred embodiment of the present invention
- FIG. 4 is a schematic cross-sectional view of FIG. 3 by III-II ′
- III-II ′ III-II ′
- FIG. 5 is a schematic top view of a pixel structure according to another preferred embodiment of the present invention. detailed description
- FIG. 3 is a top view of a pixel structure according to a preferred embodiment of the present invention
- FIG. 4 is a schematic cross-sectional view taken from ⁇ - ⁇ in FIG. 3.
- the manufacturing method of the pixel structure of the present invention first provides a substrate 200, where the substrate 200 is, for example, a transparent glass substrate or a transparent plastic substrate. Next, a scan wiring 201 and a gate electrode 202 are formed on the substrate 200, and the scan wiring 201 is connected to the gate electrode 202.
- a gate dielectric layer 204 is formed on the substrate 200 so as to cover the scanning wiring 201 and the gate 202.
- the material of the gate dielectric layer 204 is, for example, a dielectric material such as silicon nitride or silicon oxide. .
- a channel layer 206 is formed on the gate dielectric layer 204 above the gate electrode 202.
- the material of the channel layer 206 is, for example, amorphous silicon.
- a source electrode 212a and two drain electrodes 212b and 212c are formed on the channel layer 206, and a data wiring 211 and a reflective pixel electrode 221 electrically connected to the source electrode 212a are simultaneously formed on the gate dielectric layer 204.
- the reflective pixel electrode 221 is electrically connected to the drain electrode 212c.
- the gate 202, the channel layer 206, The source electrode 212a and the two drain electrodes 212b and 2112c constitute a double drain thin film transistor (Double Drain TFT) 230, and the double drain thin film transistor 230 is disposed in the center of the entire pixel structure.
- Double Drain TFT Double Drain TFT
- an ohmic contact layer 208 is further formed between the channel layer 206 and the source electrode 212a and the two drain electrodes 212b and 212c to improve the electrical contact between the two.
- a protective layer 214 is formed on the substrate 200 to cover the double-gate thin film transistor 230 and part of the gate dielectric layer 204 and expose the reflective pixel electrode 221.
- the material of the protective layer 214 is, for example, an insulating material such as silicon nitride.
- an opening 216 is formed in the protective layer 214 to expose the drain electrode 212b.
- a transparent pixel electrode 218 is formed on the protective layer 214.
- the transparent pixel electrode 218 is electrically connected to the drain electrodes 212b through the openings 216, respectively.
- the transparent pixel electrode 218 located above the scanning wiring 201 further includes a plurality of openings 219 defined therein to reduce parasitic capacitance generated between the transparent pixel electrode 218 and the scanning wiring 201.
- the area of the transparent pixel electrode 218 and the reflective pixel electrode 221 may be the same or different.
- the area of the transparent pixel electrode 218 designed in FIG. 3 is equivalent to the area of the reflective pixel electrode 221.
- the area of the transparent pixel electrode 218 is larger than the area of the reflective pixel electrode 221.
- the present invention can also be designed so that the area of the transparent pixel electrode 218 is smaller than the area of the reflective pixel electrode 221. Therefore, the pixel structure of the present invention can design the area ratio of the transparent pixel electrode 218 and the reflective pixel electrode 221 and the relative configuration thereof according to actual needs, and is not limited to the configuration ratio and configuration as described in this embodiment.
- two edges of the transflective pixel structure of the present invention further include two pixel storage capacitors 220a, 220b formed.
- the pixel storage capacitor 220a includes a shared line 222a (as a lower electrode), a conductive layer 224 and a transparent pixel electrode 218 (as an upper electrode) corresponding to the shared line 222a, and a gate between the upper and lower electrodes.
- the dielectric layer 204 is formed.
- the shared line 222a is defined at the same time when the scan wiring 201 and the gate 202 are formed.
- the conductive layer 224 is defined at the same time when the source electrode 212a, the drain electrodes 212b, 212c, and the data wiring 211 are formed.
- the transparent pixel electrode 218 and the conductive layer 224 are electrically connected to each other through an opening 226 formed in the protective layer 214. Sexual connection (with the same potential).
- the pixel storage capacitor 220b is composed of another shared line 222b (as a lower electrode), a reflective pixel electrode 221 (as an upper electrode) formed above the shared line 222b, and a gate between the upper electrode and the lower electrode.
- the electric layer 204 is formed.
- the shared line 222b and the shared line 222a are both defined when the scan wiring 201 and the gate 202 are formed at the same time.
- the transflective pixel structure of the present invention includes a scanning wiring 201, a gate dielectric layer 204, a data wiring 211, a protective layer 214, a transparent pixel electrode 218, a reflective pixel electrode 221, and A double drain thin film transistor (Double Drain TFT) 230.
- a scanning wiring 201 a gate dielectric layer 204, a data wiring 211, a protective layer 214, a transparent pixel electrode 218, a reflective pixel electrode 221, and A double drain thin film transistor (Double Drain TFT) 230.
- Double Drain TFT Double Drain TFT
- the scanning wiring 201 is disposed on the substrate 200, and the gate dielectric layer 204 is disposed on the substrate 200 and covers the scanning wiring 201.
- the data wiring 211 is disposed on the gate dielectric layer 204, and an extending direction of the data wiring 211 is different from an extending direction of the scanning wiring 201.
- a protective layer 214 is disposed on a part of the dielectric layer 204 and covers the data wiring 211.
- the transparent pixel electrode 218 is disposed on the protective layer 214, and the transparent pixel electrode 218 located above the scanning wiring 201 further has a plurality of openings 219 to reduce the parasitic capacitance between the scanning wiring 201 and the transparent pixel electrode 218. .
- the reflective pixel electrode 221 is disposed on the exposed gate dielectric layer 204, and the areas of the reflective pixel electrode 221 and the transparent pixel electrode 218 'may be equal or different.
- the dual-drain thin-film transistor 230 is disposed on the substrate 200, and the dual-drain thin-film transistor 230 is disposed in the center of the pixel structure.
- the dual-drain thin-film transistor 230 has a gate 202, a channel layer 206, and a source.
- the electrode 212a and the two drain electrodes 212b and 212c are electrically connected to the data wiring 211.
- the two drain electrodes 212b and 212c are electrically connected to the transparent pixel electrode 218 and the reflective pixel electrode 221, respectively.
- the channel layer 206 is disposed at the source electrode. 212a / two drains 212b, 212c and the gate dielectric layer 204 above the gate 202, and the gate 202 is electrically connected to the scanning wiring 201.
- two edges of the transflective pixel structure further include a pixel storage capacitor 220a and a pixel storage capacitor 220b.
- the pixel storage capacitor 220a is formed by a shared line 222a ( As a lower electrode), a conductive layer 224 and a transparent pixel electrode 218 (as a (Upper electrode) and a gate dielectric layer 204 disposed between the upper and lower electrodes, and the conductive layer 224 and the transparent pixel electrode 218 are electrically connected to each other through a contact window 226 in the protective layer 214 connection.
- the pixel storage capacitor 220b is formed by a shared line 222bCi disposed on the substrate 200 as a lower electrode), a reflective pixel electrode 221 (as an upper electrode) correspondingly disposed above the shared line 222b, and one of the upper and lower electrodes
- the gate dielectric layer 204 is formed.
- the present invention has both a transmissive and a reflective structure in a pixel structure, using such a pixel structure in a liquid crystal display can have the advantages of a semi-transmissive and semi-reflective liquid crystal display, such as power saving.
- a plurality of pixel structures of the present invention are arranged on the substrate in a delta type (Delta Type), the display quality will be further improved.
- the present invention has the following advantages:
- the present invention has both a transmissive and reflective structure in a pixel structure, such a pixel structure has the advantages of a semi-transmissive and semi-reflective liquid crystal display, such as power saving, used in a liquid crystal display.
- the thin film transistor of the pixel structure of the present invention is disposed in the center of the pixel structure, and the two drain electrodes of the thin film transistor simultaneously drive the pixel electrodes on both sides thereof, the pixel structure of the present invention is less affected by the process particles. As a result, the entire pixel structure does not work properly.
- the thin film transistor is arranged at the center of the pixel structure, so that the electric field distribution on the pixel electrode can be made more uniform, so this configuration method has a positive effect on the display.
- the design of the driving circuit is simplified compared to the structure of the existing pixel structure.
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW091134997A TW578123B (en) | 2002-12-03 | 2002-12-03 | Pixel having transparent structure and reflective structure |
AU2003207149A AU2003207149A1 (en) | 2003-01-08 | 2003-01-08 | Transflective pixel arrangement |
PCT/CN2003/000012 WO2004063802A1 (fr) | 2002-12-03 | 2003-01-08 | Agencement de pixels transflectif |
US10/248,573 US6819385B2 (en) | 2002-12-03 | 2003-01-30 | Transflective pixel structure |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW091134997A TW578123B (en) | 2002-12-03 | 2002-12-03 | Pixel having transparent structure and reflective structure |
PCT/CN2003/000012 WO2004063802A1 (fr) | 2002-12-03 | 2003-01-08 | Agencement de pixels transflectif |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004063802A1 true WO2004063802A1 (fr) | 2004-07-29 |
Family
ID=32991707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2003/000012 WO2004063802A1 (fr) | 2002-12-03 | 2003-01-08 | Agencement de pixels transflectif |
Country Status (1)
Country | Link |
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WO (1) | WO2004063802A1 (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100412670C (zh) * | 2006-09-15 | 2008-08-20 | 友达光电股份有限公司 | 像素结构与液晶显示面板 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20010015777A1 (en) * | 1999-12-31 | 2001-08-23 | Kyoung-Su Ha | Array substrate for a transflective liquid crystal display device and the fabricating method |
US20010022638A1 (en) * | 1999-12-21 | 2001-09-20 | Kyoung-Su Ha | Transflective liquid crystal display device |
US20010030719A1 (en) * | 2000-04-14 | 2001-10-18 | Advanced Display Inc. | Liquid crystal dlsplay and manufacturing method therefor |
-
2003
- 2003-01-08 WO PCT/CN2003/000012 patent/WO2004063802A1/zh not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20010022638A1 (en) * | 1999-12-21 | 2001-09-20 | Kyoung-Su Ha | Transflective liquid crystal display device |
US20010015777A1 (en) * | 1999-12-31 | 2001-08-23 | Kyoung-Su Ha | Array substrate for a transflective liquid crystal display device and the fabricating method |
US20010030719A1 (en) * | 2000-04-14 | 2001-10-18 | Advanced Display Inc. | Liquid crystal dlsplay and manufacturing method therefor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100412670C (zh) * | 2006-09-15 | 2008-08-20 | 友达光电股份有限公司 | 像素结构与液晶显示面板 |
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