CN1333295C - Pixel arrangement adapted for wide view angle LCD - Google Patents
Pixel arrangement adapted for wide view angle LCD Download PDFInfo
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- CN1333295C CN1333295C CNB2005100650960A CN200510065096A CN1333295C CN 1333295 C CN1333295 C CN 1333295C CN B2005100650960 A CNB2005100650960 A CN B2005100650960A CN 200510065096 A CN200510065096 A CN 200510065096A CN 1333295 C CN1333295 C CN 1333295C
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- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 42
- 239000000758 substrate Substances 0.000 claims description 16
- 238000009413 insulation Methods 0.000 claims description 13
- 230000000994 depressogenic effect Effects 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 abstract 5
- 230000004044 response Effects 0.000 description 4
- 230000002596 correlated effect Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical compound O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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Abstract
The present invention provides a picture element structure suitable for a wide view angle liquid crystal display, which comprises a base plate, a picture element electrode and a storage capacitor, wherein the picture element electrode is arranged above a picture element region of the base plate, and the picture element electrode is provided with at least one fine slit; the storage capacitor is arranged between the base plate and the picture element electrode, and the storage capacitor comprises a lower electrode, a capacitor dielectric layer and an upper electrode; the lower electrode is arranged in the picture element region, and the lower electrode and the fine slit form an overlapped region; the capacitor dielectric layer and the upper electrode are orderly arranged on the lower electrode, wherein the upper electrode is provided with at least one concave region for partially exposing the overlapped region.
Description
Technical field
The present invention relates to a kind of dot structure, relate in particular to a kind of dot structure that is applicable to wide viewing angle (wide-viewingangle) LCD.
Background technology
LCD (LCD) is the effect that utilizes extra electric field, makes liquid crystal molecule rotate and changes the LCD alignment state.LCD changes the variation of the various optical properties produced by liquid crystal alignment, and for example birefringence, optical activity, dichromatism etc. convert thereof into visual variation to reach the purpose of show image information.Because LCD has thin thickness, in light weight, low power consumption, and characteristics such as low operating voltage, be widely used on the electronic products such as Portable personal computer, digital camera, projector at present, and in flat-panel screens market, occupied an important position.
Present LCD is towards high brightness, high contrast, wide viewing angle, large tracts of land, and the trend development of full-colorization.Wherein, in order to solve the problem at visual angle, develop and a kind of multiple regions perpendicular orientation (multi-domain vertical alignment, MVA) LCD, it is that the liquid crystal region that will show usefulness is separated into multiple zone, use that liquid crystal molecule is toppled over towards a plurality of directions, and then increase the visual angle of LCD.In this kind LCD,, need control the orientation of liquid crystal usually with tilt angle (pre-tilt angle) in order accurately to control the toppling direction of liquid crystal molecule.The general common practice is to utilize the slit (slit) and the combination of teat (protrusion) to produce tilt angle.
Fig. 6 shows dot structure 100 diagrammatic cross-sections of traditional multiple regions perpendicular alignment liquid crystal display monitor.Dot structure 100 comprises: an infrabasal plate 101, a memory capacitance 102, an insulation course 104, an and pixel electrode 106.Infrabasal plate 101 for example is an array basal plate, and its top is sequentially provided with memory capacitance 102, insulation course 104, reaches pixel electrode 106.Typically, memory capacitance 102 comprises: a bottom electrode 102a, a capacitance dielectric layer 102b, an and top electrode 102c, wherein top electrode 102c is the contact hole 104a that sees through in the insulation course 104, and electrically connects with the pixel electrode 106 of top.Pixel electrode 106 has in order to the slit 106a that produces tilt angle and its can stride across memory capacitance 102 tops usually.
Yet the current potential that top electrode 102c is identical because of electric connection has with pixel electrode 106 makes the slit 106a be positioned at memory capacitance 102 tops (that is, the overlapping district of slit 106a and memory capacitance 102) can't form tilt angle.Therefore, be close to the middle meeting generation of liquid crystal layer (not illustrating) the disclination line (disclination line) at slit 106a place, memory capacitance 102 top.The generation of disclination line can cause the brightness decline and the increase of response time (response time) of MVA LCD.Especially, the problem of colour cast (color wash out) can be even more serious because of the generation of disclination line, makes the image quality of MVA LCD descend.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of dot structure that is applicable to wide-angle liquid crystal display, it is by the shape that changes memory capacitance, to improve or to prevent that the slit of pixel electrode from producing the disclination line in the liquid crystal layer at contiguous memory capacitance place.
According to above-mentioned purpose, the invention provides a kind of dot structure that is applicable to wide-angle liquid crystal display, it comprises a substrate, a pixel electrode, reaches a memory capacitance.Pixel electrode is arranged at the pixel region top of substrate, and it has at least one slit.Memory capacitance is arranged between substrate and the pixel electrode, and it comprises a bottom electrode, a capacitance dielectric layer, reaches a top electrode.Bottom electrode is arranged in the pixel region, and itself and slit have an overlapping district.Capacitance dielectric layer is arranged on the bottom electrode, and top electrode is arranged at and electrically connects on the capacitance dielectric layer of bottom electrode top and with this pixel electrode, and this top electrode has at least one depressed area, exposes overlapping with the part and distinguishes.
According to above-mentioned purpose, the invention provides a kind of dot structure that is applicable to wide-angle liquid crystal display again, it comprises a substrate, a pixel electrode, reaches a memory capacitance.Pixel electrode is arranged at the pixel region top of substrate, and it has at least one slit.Memory capacitance is arranged between substrate and the pixel electrode, and it comprises a bottom electrode, a capacitance dielectric layer, reaches at least two top electrodes.Bottom electrode is arranged in the pixel region, and itself and slit have an overlapping district.Capacitance dielectric layer is arranged on the bottom electrode, and at least two top electrodes are arranged at and electrically connect on the capacitance dielectric layer of bottom electrode top and with this pixel electrode, and at least two top electrodes are separated by the overlapping district.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is the planimetric map that shows the dot structure that is applicable to wide-angle liquid crystal display according to an embodiment of the invention;
Fig. 2 a is the diagrammatic cross-section that shows among Fig. 1 along an embodiment of 2-2 line;
Fig. 2 b is the diagrammatic cross-section that shows the dot structure that is applicable to wide-angle liquid crystal display of another embodiment;
Fig. 3 is the planimetric map that shows the dot structure that is applicable to wide-angle liquid crystal display according to an embodiment of the invention;
Fig. 4 is the planimetric map that shows the dot structure that is applicable to wide-angle liquid crystal display according to an embodiment of the invention;
Fig. 5 is the planimetric map that shows the dot structure that is applicable to wide-angle liquid crystal display according to an embodiment of the invention;
Fig. 6 is the dot structure diagrammatic cross-section that shows traditional multiple regions perpendicular alignment liquid crystal display monitor.
Symbol description
Prior art:
100～dot structure; 101～infrabasal plate; 102～memory capacitance; 102a～bottom electrode; 102b～capacitance dielectric layer; 102c～top electrode; 104～insulation course; 104a～contact hole; 106～pixel electrode; 106a～slit.
The present invention:
200～infrabasal plate; 200a～pixel region; 201～gate line; 202～memory capacitance; 202a～bottom electrode; 202b～capacitance dielectric layer; 202c～top electrode; 203～data line; 204～insulation course; 204a, 204b～contact hole; 205～depressed area; 206～pixel electrode; 206a～slit; 207～district overlaps; 210～upper substrate; 210a～teat.
Embodiment
The dot structure that is applicable to wide-angle liquid crystal display that below cooperates Fig. 1 and 2a explanation one embodiment of the invention, wherein Fig. 1 is the planimetric map that shows the dot structure that is applicable to wide-angle liquid crystal display, and Fig. 2 a is the diagrammatic cross-section that shows among Fig. 1 along the 2-2 line.Herein, wide-angle liquid crystal display can be multiple regions perpendicular orientation (multi-domain vertical alignment, MVA) LCD.Dot structure comprises: infrabasal plate 200, a memory capacitance 202, an insulation course (sheath) 204, a pixel electrode 206, liquid crystal layer 208 and a upper substrate 210.Infrabasal plate 200 for example is that it is provided with many data lines and many gate lines by clear glass or the quartzy array base palte that is constituted.The row that intersects vertically puts and constitutes a plurality of pixel regions for these data lines and gate line., be to simplify accompanying drawing herein, only represent with a gate line 201, a data line 203 and the pixel region 200a that constituted by gate line 201 and data line 203.
Above pixel region 202, be provided with a thin film transistor (TFT) (not illustrating) and a pixel electrode 206 that is electrically connected to gate line 201 and data line 203.Herein, pixel electrode 206 is made of a transparency conducting layer, for example tin indium oxide (ITO).Wherein, pixel electrode 206 has at least one slit 206a, and in the present embodiment, this slit 206a arranges virtual raised structures in the liquid crystal display device structure as multiple regions perpendicular.In addition, on the pixel region 202 between pixel electrode 206 and the infrabasal plate 200, be provided with an insulation course (sheath) 204, for example constituted, shown in Fig. 2 a by organic material or silicon nitride.
In the present embodiment, because top electrode 202c has depressed area 205, thereby can significantly reduce top electrode 202c area in the overlapping district 207 between bottom electrode 202a and slit 206a.Therefore, overlap that can not have same potential because of the top electrode 202c of pixel electrode 206 and memory capacitance 202 ineffective fully and cause the generation of disclination line for slit 206a in the district 207.Thus, the brightness that can improve display according to dot structure of the present invention descends and problem such as response time (response time) increase.Moreover, can improve the color offset phenomenon at contiguous memory capacitance 202 places and promote the image quality of display.
Fig. 3 is the planimetric map that shows the dot structure that is applicable to wide-angle liquid crystal display according to an embodiment of the invention, and wherein identical with Fig. 1 parts use identical label to represent and omit the explanation of being correlated with.The difference of the embodiment of Fig. 3 and the embodiment of Fig. 1 is the shape of slit 206a.In the present embodiment, the slit 206a of pixel electrode 206 has an inclination angle with respect to bottom electrode 202a and slit 206a is a bar shaped.
Fig. 4 is the planimetric map that shows the dot structure that is applicable to wide-angle liquid crystal display according to an embodiment of the invention, and wherein identical with Fig. 1 parts use identical label to represent and omit the explanation of being correlated with.The difference of the embodiment of Fig. 4 and the embodiment of Fig. 1 is that it is two parts that overlapping district 207 opens top electrode 202c.That is the top electrode 202c of 207 tops, district that overlap has a gap, make V-arrangement overlap district 207 fully or the part expose, only show situation that exposing the district 207 that overlaps fully herein.Thus, it is ineffective and cause the generation of disclination line that the slit 206a that is positioned at the district 207 that overlaps can not have same potential because of the top electrode 202c of pixel electrode 206 and memory capacitance 202.Be noted that,,, make the top electrode 202c of each separation and pixel electrode 206 electrically connect so must in insulation course 204, form extra contact hole 204b because top electrode 202c is split up into two parts fully.That is, corresponding at least one contact hole 204a of the top electrode 202c of each part or 204b.
Fig. 5 is the planimetric map that shows the dot structure that is applicable to wide-angle liquid crystal display according to an embodiment of the invention, and wherein identical with Fig. 4 parts use identical label to represent and omit the explanation of being correlated with.The difference of the embodiment of Fig. 5 and the embodiment of Fig. 4 is the shape of slit 206a.In the present embodiment, the slit 206a of pixel electrode 206 has an inclination angle with respect to bottom electrode 202a and slit 206a is a bar shaped.Similarly, top electrode 202c is split up into two parts fully, make bar shaped overlap district 207 fully or the part expose.Similarly, only show the situation of exposing the district 207 that overlaps fully herein.Therefore, need in the insulation course 204 to form extra contact hole 204b, make the top electrode 202c of each separation and pixel electrode 206 electrically connect.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any those skilled in the art; under the premise without departing from the spirit and scope of the present invention; can make various modifications and variations, so protection scope of the present invention is as the criterion when looking the claims person of defining.
Claims (13)
1. dot structure that is applicable to wide-angle liquid crystal display comprises:
One substrate, it has a pixel region;
One pixel electrode is arranged at this pixel region top, and it has at least one slit; And
One memory capacitance is arranged between this substrate and this pixel electrode, and it comprises:
One bottom electrode is arranged in this pixel region of this substrate, and itself and this slit has an overlapping district;
One capacitance dielectric layer is arranged on this bottom electrode; And
One top electrode is arranged on this capacitance dielectric layer of this bottom electrode top and with this pixel electrode and electrically connects, and this top electrode has at least one depressed area, exposes this overlapping district with the part.
2. the dot structure that is applicable to wide-angle liquid crystal display as claimed in claim 1, wherein the width of this depressed area is not less than the width of this slit.
3. the dot structure that is applicable to wide-angle liquid crystal display as claimed in claim 1, wherein the width of this depressed area is less than the width of this slit.
4. the dot structure that is applicable to wide-angle liquid crystal display as claimed in claim 1, wherein this bottom electrode is bar shaped, and this slit has an inclination angle with respect to this bar shaped bottom electrode.
5. the dot structure that is applicable to wide-angle liquid crystal display as claimed in claim 4, wherein this slit be a V-arrangement and with this bar shaped bottom electrode as an axis of symmetry.
6. the dot structure that is applicable to wide-angle liquid crystal display as claimed in claim 4, wherein this top electrode has a pair of depressed area, part respectively to expose this overlapping district.
7. the dot structure that is applicable to wide-angle liquid crystal display as claimed in claim 1 also comprises an insulation course, is arranged between this pixel electrode and this memory capacitance, and it has a contact hole, to electrically connect this pixel electrode and this top electrode.
8. the dot structure that is applicable to wide-angle liquid crystal display as claimed in claim 1, wherein this bottom electrode is arranged at the center section in this pixel region.
9. dot structure that is applicable to wide-angle liquid crystal display comprises:
One substrate, it has a pixel region;
One pixel electrode is arranged at this pixel region top, and it has at least one slit; And
One memory capacitance is arranged between this substrate and this pixel electrode, and it comprises:
One bottom electrode is arranged in this pixel region of this substrate, and itself and this slit has an overlapping district;
One capacitance dielectric layer is arranged on this bottom electrode; And
At least two top electrodes are arranged on this capacitance dielectric layer of this bottom electrode top and with this pixel electrode and electrically connect, and separate out those top electrodes by this overlapping.
10. the dot structure that is applicable to wide-angle liquid crystal display as claimed in claim 9, wherein this bottom electrode is bar shaped, and this slit has an inclination angle with respect to this bar shaped bottom electrode.
11. the dot structure that is applicable to wide-angle liquid crystal display as claimed in claim 10, wherein this slit be a V-arrangement and with this bar shaped bottom electrode as an axis of symmetry.
12. the dot structure that is applicable to wide-angle liquid crystal display as claimed in claim 9 also comprises an insulation course, is arranged between this pixel electrode and this memory capacitance, it has at least two contact holes, to electrically connect this pixel electrode and those top electrodes.
13. the dot structure that is applicable to wide-angle liquid crystal display as claimed in claim 9, wherein this bottom electrode is arranged at the center section in this pixel region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100650960A CN1333295C (en) | 2005-04-14 | 2005-04-14 | Pixel arrangement adapted for wide view angle LCD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100650960A CN1333295C (en) | 2005-04-14 | 2005-04-14 | Pixel arrangement adapted for wide view angle LCD |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1664678A CN1664678A (en) | 2005-09-07 |
| CN1333295C true CN1333295C (en) | 2007-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100650960A Expired - Fee Related CN1333295C (en) | 2005-04-14 | 2005-04-14 | Pixel arrangement adapted for wide view angle LCD |
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| Country | Link |
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| CN (1) | CN1333295C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI333110B (en) | 2006-10-16 | 2010-11-11 | Au Optronics Corp | Multi-domain vertically alignment liquid crystal display panel |
| CN100437261C (en) * | 2006-10-27 | 2008-11-26 | 友达光电股份有限公司 | Multizone vertical alignment liquid crystal panel |
| TWI372279B (en) | 2007-08-28 | 2012-09-11 | Au Optronics Corp | Liquid crystal display panel and pixel structure |
| JP5260468B2 (en) * | 2009-10-22 | 2013-08-14 | スタンレー電気株式会社 | Liquid crystal display |
| CN102681260B (en) * | 2011-03-07 | 2015-04-29 | 联胜（中国）科技有限公司 | Display panel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000214464A (en) * | 1999-01-20 | 2000-08-04 | Sanyo Electric Co Ltd | Vertically aligned liquid crystal display device |
| JP2000227611A (en) * | 1999-02-05 | 2000-08-15 | Nec Corp | Liquid crystal display device and its production |
| JP2001249350A (en) * | 2000-03-03 | 2001-09-14 | Nec Corp | Liquid crystal display device and method of manufacturing the same |
| JP2002122887A (en) * | 2000-06-12 | 2002-04-26 | Nec Corp | Liquid crystal display device and its manufacturing method |
| JP2004213011A (en) * | 2003-01-03 | 2004-07-29 | Samsung Electronics Co Ltd | Thin film transistor display plate for multi-domain liquid crystal display device |
| US6771344B2 (en) * | 1997-05-29 | 2004-08-03 | Samsung Electronics Co., Ltd. | Liquid crystal display having wide viewing angle |
-
2005
- 2005-04-14 CN CNB2005100650960A patent/CN1333295C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6771344B2 (en) * | 1997-05-29 | 2004-08-03 | Samsung Electronics Co., Ltd. | Liquid crystal display having wide viewing angle |
| JP2000214464A (en) * | 1999-01-20 | 2000-08-04 | Sanyo Electric Co Ltd | Vertically aligned liquid crystal display device |
| JP2000227611A (en) * | 1999-02-05 | 2000-08-15 | Nec Corp | Liquid crystal display device and its production |
| JP2001249350A (en) * | 2000-03-03 | 2001-09-14 | Nec Corp | Liquid crystal display device and method of manufacturing the same |
| JP2002122887A (en) * | 2000-06-12 | 2002-04-26 | Nec Corp | Liquid crystal display device and its manufacturing method |
| JP2004213011A (en) * | 2003-01-03 | 2004-07-29 | Samsung Electronics Co Ltd | Thin film transistor display plate for multi-domain liquid crystal display device |
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| Publication number | Publication date |
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| CN1664678A (en) | 2005-09-07 |
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Granted publication date: 20070822 |