CN102162949A - Liquid crystal display device - Google Patents
Liquid crystal display device Download PDFInfo
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- CN102162949A CN102162949A CN2011100427022A CN201110042702A CN102162949A CN 102162949 A CN102162949 A CN 102162949A CN 2011100427022 A CN2011100427022 A CN 2011100427022A CN 201110042702 A CN201110042702 A CN 201110042702A CN 102162949 A CN102162949 A CN 102162949A
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Abstract
The invention provides a liquid crystal display device of low cost and high yield, wherein the visual angle is controllable. The device comprises a substrate (8) formed with a pixel electrode (15) and a common electrode (14), an opposition substrate (7) formed with a colored layer corresponding to the pixel electrode, a shading layer (9) formed on the boundary of two adjacent colored layers and liquid crystal arranged between the substrate and the opposition substrate. The volume resistivity of the shading layer is smaller than 108 omege*cm. When visual angle control signals are provided to the shading layer, electric fields vertical to the surface of the substrate (8) are formed between the shading layer (9) and the pixel electrode (15) and between the shading layer (9) and the common electrode (14). Therefore, the contrast is lowered when viewed inclinedly so as to control the visual angle.
Description
Technical field
The present invention relates to control the liquid crystal indicator at visual angle.
Background technology
Liquid crystal indicator by the active driving of thin film transistor (TFT) has feature frivolous, that power consumption is low and display quality is high.Wherein IPS (In-Plane-Switching: switch in the face) type liquid crystal indicator visual angle is wide, is widely used in TV or personal computer, the portable electric appts etc.In the wide IPS type liquid crystal indicator in visual angle, a plurality of people see that same display frame is possible.On the other hand, under the situation that shows personal information,, wish to have the liquid crystal indicator that to adjust the visual angle in order to protect privacy.Can be open in for example Japanese kokai publication hei 11-30783 communique (patent documentation 1) or TOHKEMY 2006-323280 communique (patent documentation 2) according to the liquid crystal indicator at application target or environment adjustment visual angle.On counter substrate, the 3rd electrode is set in these liquid crystal indicators with common electrode and the opposed mode of pixel electrode with the surface that is arranged on substrate.Then, by between common electrode and pixel electrode, applying and view data corresponding driving voltage, thereby by the state of orientation display image of the electric field driven liquid crystal layer between common electrode and the pixel electrode.And, by between the either party of the 3rd electrode and common electrode and pixel electrode, applying voltage, form electric field, thereby the visual angle is narrowed down from the state of orientation of oblique driving liquid crystal layer perpendicular to real estate.
Like this, in the liquid crystal indicator of existing adjustable viewing angle, because the operation of the 3rd electrode need be set, this becomes the main cause that cost increases.
Summary of the invention
Therefore, here to realize that with cheap structure the liquid crystal indicator of adjustable viewing angle is a purpose.
In liquid crystal indicator of the present invention, the 3rd electrode is not set but utilizes light shield layer to form the viewing angle control electric field.That is to say, comprising: substrate is formed with pixel electrode and common electrode; Counter substrate is formed with the dyed layer corresponding to pixel electrode, and is formed with light shield layer on the border of the dyed layer of adjacency; Liquid crystal is configured between substrate and the counter substrate; And driving circuit, offer drive signal in order to drive liquid crystal to pixel electrode and common electrode.The specific insulation of light shield layer is 10
8Below the Ω cm, when driving circuit offers the viewing angle control signal to light shield layer, can control the visual angle thereby form electric field between light shield layer, pixel electrode and the common electrode.
Like this, in normal the demonstration, apply voltage to common electrode and pixel electrode, the parallel electric field of the relative substrate of formation between common electrode and pixel electrode by drive signal.On the other hand, in narrow visual angle shows, apply voltage to light shield layer by the viewing angle control signal, thereby at light shield layer and pixel electrode and light shield layer and the vertical electric field of the relative substrate of formation between the electrode jointly.
Description of drawings
Fig. 1 is the schematic plan view that the substrate that uses in the liquid crystal indicator of embodiment 1 is shown.
Fig. 2 is the schematic section of the liquid crystal indicator of embodiment 1.
Fig. 3 is the schematic section of action of liquid crystal of the liquid crystal indicator of explanation embodiment 1.
Fig. 4 is the schematic section of action of liquid crystal of the liquid crystal indicator of explanation embodiment 1.
Fig. 5 is the schematic section of action of liquid crystal of the liquid crystal indicator of explanation embodiment 1.
Embodiment
Liquid crystal indicator of the present invention is at the substrate that is formed with common electrode, pixel electrode and be opposite to clamping liquid crystal layer between the counter substrate of substrate configuration.By driving circuit when pixel electrode offers drive signal with common electrode, thereby liquid crystal is driven display image.On counter substrate corresponding to pixel electrode be provided with dyed layer, be formed with light shield layer on the border of the dyed layer of adjacency.Here, the specific insulation of light shield layer is 10
8Below the Ω cm.In common demonstration, during this driving circuit output drive signal, thereby apply the electric field (normal electric field) that voltage forms relative substrate almost parallel to common electrode and pixel electrode.On the other hand, in narrow visual angle showed, driving circuit output viewing angle control signal also applied voltage to light shield layer, thereby formed the vertical electric field of relative substrate (viewing angle control electric field) with normal electric field between light shield layer and common electrode and pixel electrode.Realized the liquid crystal indicator that can narrow visual angle shows at an easy rate by such structure.That is to say, can make the low light shield layer of specific insulation, can not become the main cause that cost rises with common manufacturing process.
In addition, the viewing angle control switch is set on driving circuit, by switching this switch, can select to have formed the normal demonstration of normal electric field, and the narrow visual angle demonstration that has formed normal electric field and the viewing angle control electric field that relative substrate is vertical between light shield layer and common electrode and common electrode.
In addition, when supplying with the viewing angle control signal, can change voltage value of setting of drive signal.That is to say that when supplying with the viewing angle control signal, owing to the contrast under the situation about seeing from the front reduces, the setting of optimization drive signal can be discerned demonstration well so that the front is looked down.Therefore, positive degree of looking down contrast decline can be regulated, and the viewing angle control of observer's preference can be set.
In addition, showing to the process that normal demonstration is switched, also can make light shield layer be connected to ground connection (GND) and make the residual charge discharge of light shield layer from narrow visual angle.
Below explain liquid crystal indicator of the present invention with embodiment.
(embodiment)
Fig. 2 is the partial section of the structure of explanation liquid crystal indicator 1.As shown in the figure, between substrate 8 and counter substrate 7, be provided with liquid crystal layer 2.Here, liquid crystal layer comprises the nematic crystal molecule with positive dielectric constant anisotropy.
On the surface of counter substrate 7 (near the face of liquid crystal layer 2) thus banded ground arrange dyed layer 10R, 10G, the 10B of this 3 look of red, green, blue repeatedly and form chromatic filter layer 10.And, on counter substrate 7, be 10 at dyed layer 10R, the 10G of adjacency, the boundary portion formation specific insulation of 10B
8The light shield layer 9 that Ω cm is following.Be formed with resinous planarization layer 11 on the surface of chromatic filter layer 10, form alignment films 12 on the surface of planarization layer 11.Last alignment films 12 is near liquid crystal layer 2 and stipulate its direction of orientation.
Fig. 1 schematically shows the planar structure of the substrate that uses in the present embodiment.Fig. 2 is corresponding to the cross section among the dotted line A-B shown in Figure 1.On the surface of substrate 8 (near liquid crystal layer 2 one sides), on second insulation course 18, form signal routing 17 and pixel electrode 15.And, on second insulation course 18, form first insulation course 16 to cover signal routing 17 and pixel electrode 15.Upper surface at first insulation course 16 forms common electrode 14.Common electrode 14 is shapes that a hole is set on a pixel electrode 15 at least.Common electrode 14 is set on all pixel electrodes 15, and each common electrode that is provided with on the pixel adjacent links to each other.Upper surface at common electrode 14 forms alignment films 13 down.By the orientation angles and apply the values that direction of an electric field angulation be 70 degree～110 degree that are parallel to substrate 8 of last alignment films 12 with the liquid crystal molecule of following alignment films 13 regulations.
Further, the upper surface in counter substrate 7 forms the nesa coating 6 that cuts off static.Polarization plate 4 in configuration on the nesa coating 6, polarization plate 5 under the configuration below substrate 8.Engage this counter substrate 7 and substrate 8 with encapsulant (not shown).Encapsulant is the shaped as frame that surrounds the picture area of liquid crystal indicator.Between counter substrate 7 and substrate 8, enclose liquid crystal layer 2.The last alignment films 12 that clips liquid crystal layer 2 is carried out the homogeneous orientation process with following alignment films 13.In addition, as shown in Figure 1, be formed with thin film transistor (TFT) 21 as driver element at substrate 8.This thin film transistor (TFT) 21 is contrary staggered (contrary ス タ ガ) type structures, and groove forms with amorphous silicon layer 20, be arranged on that scanning lines 19 and signal routing 17 intersect near.
Then, use Fig. 3 to Fig. 5 that the action of liquid crystal of the liquid crystal indicator of present embodiment is described.Fig. 3 to Fig. 5 is the synoptic diagram that the cross section structure of liquid crystal indicator is shown partly.As shown in the figure, the counter substrate 7 that is formed with photomask 9 and be formed with common electrode 14 and the substrate 8 of pixel electrode 15 between dispose the liquid crystal layer 2 that comprises liquid crystal molecule 3.In addition, the driving circuit of liquid crystal indicator 1 has viewing angle control switch 24.Fig. 3 illustrates the not controlled show state in visual angle.Liquid crystal molecule 3 drives by the electric field between common electrode 14 and the pixel electrode 15.The relative substrate of the direction of this electric field 8 is parallel, and liquid crystal molecule 3 becomes the state of relative substrate 8 almost parallels.
Fig. 4 illustrates the controlled show state in visual angle.Supply with viewing angle control signal 23 by switching viewing angle control switch 24 to light shield layer 9.Liquid crystal molecule 3 is driven by the electric field (viewing angle control electric field) that is formed at the electric field (normal electric field) between common electrode 14 and the pixel electrode 15 and be formed between the electric field between light shield layer 9, common electrode 14 and the pixel electrode 15.This viewing angle control electric field becomes the electric field of relative substrate 8 approximate vertical.Therefore, as shown in the figure, in narrow visual angle showed, one one liquid crystal molecule 3 erected with the relative substrate of electric field between the common electrode 14 because of light shield layer 9.When observing liquid crystal indicator 1 sideling under this state, contrast significantly descends, and is controlled thereby the identification of demonstration becomes the difficulty visual angle.
Fig. 5 illustrates the discharge condition of getting back to the residual charge before the not controlled normal show state in visual angle from the controlled state in visual angle.Temporarily switch viewing angle control switch 24, thereby make light shield layer 9 ground connection make the residual charge discharge.After this, by becoming common show state at 10 seconds with interior switching viewing angle control switch 24 as shown in Figure 3.
Like this, in the viewing angle control pattern, be applied in voltage on the light shield layer 9, form the viewing angle control electric field between light shield layer 9 and pixel electrode 15 and light shield layer 9 and the common electrode 14.At this moment, the specific insulation by making light shield layer 9 is 10
8Below the Ω cm, all apply the voltage that forms the necessary electric field of viewing angle control to light shield layer.Generally, form light shield layer 9, reduce specific insulation by the carbon black containing ratio that increases the resin solid part by the pigment-dispersing type resin.In addition, light shield layer 9 can use metals such as chromium, molybdenum or aluminium alloy, or the lit-par-lit structure of pigment-dispersing type resin and metal film.
In addition, also can adopt an inversion driving or row inversion driving mode.Thus, can make common electrode signal and viewing angle control signal is direct current, is subjected to the influence of the specific insulation or the specific inductive capacity of chromatic filter layer, planarization layer and last alignment films hardly, thereby forms the viewing angle control electric field.
In addition, by the voltage that applies of control light shield layer 9, thereby the degree that the adjusting contrast descends can be set the viewing angle control of user preference.
In addition, under the situation that the state of viewing angle control is seen from the front, thereby liquid crystal indicator 1 also can change the voltage setting value of liquid crystal drive with signal 22 with viewing angle control switch 24 interlocks.For example, in control during the visual angle, increase the tonal range of deceiving side thereby also liquid crystal drive can be set at than big usually value with the gamma setting value of signal 22.In addition, also can change boost setting value and change with the liquid crystal display relevant voltage of liquid crystal drive with the voltage source of signal 22.The setting value of boosting of voltage setting value or voltage source by change liquid crystal driving signal like this under the controlled state in visual angle, can cushion contrast and descend under the situation of seeing liquid crystal indicator 1 from the front.
[description of reference numerals]
1 liquid crystal indicator; 2 liquid crystal layers; 3 liquid crystal molecules; Polarization plate on 4; 5 times polarization plates; 6 nesa coatings; 7 counter substrate; 8 substrates; 9 light shield layers; 10R, 10G, 10B dyed layer; 11 planarization layers; Alignment films on 12; 13 times alignment films; 14 common electrodes; 15 pixel electrodes; 16 first insulating barriers; 17 signal routings; 18 second insulating barriers; 19 scanning lines; 20 amorphous silicon layers; 21 thin film transistor (TFT)s; 22 liquid crystal drive signals; 23 viewing angle control signals; 24 viewing angle control switches.
Claims (5)
1. a LCD is characterized in that, comprising:
Substrate is formed with pixel electrode and common electrode;
Counter substrate is formed with the dyed layer that is provided with in the mode corresponding to pixel electrodes, and is arranged on the light shield layer between the above-mentioned dyed layer of adjacency;
Liquid crystal is configured between aforesaid substrate and the above-mentioned counter substrate; And
Driving circuit offers drive signal in order to drive liquid crystal to pixel electrodes and above-mentioned common electrode,
The specific insulation of above-mentioned light shield layer is 10
8Below the Ω cm, be electrically connected with above-mentioned driving circuit,
When above-mentioned driving circuit offers the viewing angle control signal to above-mentioned light shield layer, thereby between above-mentioned light shield layer and pixel electrodes and above-mentioned common electrode, form electric field control visual angle.
2. liquid crystal indicator according to claim 1 is characterized in that,
Above-mentioned driving circuit changes voltage value of setting of above-mentioned drive signal when supplying with above-mentioned viewing angle control signal.
3. liquid crystal indicator according to claim 1 and 2 is characterized in that,
Above-mentioned light shield layer forms with the pigment-dispersing type resin that contains carbon black.
4. liquid crystal indicator according to claim 1 and 2 is characterized in that,
Above-mentioned light shield layer forms by metal film.
5. liquid crystal indicator according to claim 1 and 2 is characterized in that,
Stacked pigment-dispersing type resin of above-mentioned light shield layer and metal film form.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010031606A JP5485742B2 (en) | 2010-02-16 | 2010-02-16 | Liquid crystal display |
| JP2010-031606 | 2010-12-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102162949A true CN102162949A (en) | 2011-08-24 |
| CN102162949B CN102162949B (en) | 2015-06-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110042702.2A Expired - Fee Related CN102162949B (en) | 2010-02-16 | 2011-02-16 | Liquid crystal display device |
Country Status (2)
| Country | Link |
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| JP (1) | JP5485742B2 (en) |
| CN (1) | CN102162949B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692762A (en) * | 2012-05-24 | 2012-09-26 | 深圳市华星光电技术有限公司 | Method for manufacturing liquid crystal display panel |
| CN105975120A (en) * | 2016-04-26 | 2016-09-28 | 京东方科技集团股份有限公司 | Touch panel and display apparatus |
| CN106646936A (en) * | 2016-11-02 | 2017-05-10 | 昆山龙腾光电有限公司 | View-angle-switchable liquid crystal display device and driving method |
| CN107238984A (en) * | 2017-08-04 | 2017-10-10 | 京东方科技集团股份有限公司 | Display device, liquid crystal display panel and its driving method |
| CN108287427A (en) * | 2017-12-04 | 2018-07-17 | 友达光电股份有限公司 | Display panel |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6028345B2 (en) * | 2012-03-13 | 2016-11-16 | 大日本印刷株式会社 | Color filter forming substrate for horizontal electric field type LCD display panel and horizontal electric field type LCD display panel |
| CN110376804B (en) * | 2019-06-27 | 2022-08-02 | 上海天马微电子有限公司 | Display panel, driving method thereof and display device |
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| CN1164668A (en) * | 1995-06-14 | 1997-11-12 | 株式会社日立制作所 | Liquid crystal display device with wide viewing angle characteristics comprising high resistivity black matrix |
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| JP3746333B2 (en) * | 1996-08-05 | 2006-02-15 | 三菱電機株式会社 | Liquid crystal display |
| JPH10260401A (en) * | 1997-03-18 | 1998-09-29 | Seiko Epson Corp | Liquid crystal color filter and method of manufacturing liquid crystal color filter |
| JPH1130783A (en) * | 1997-07-14 | 1999-02-02 | Mitsubishi Electric Corp | Liquid crystal display element |
| JP4664063B2 (en) * | 2004-12-27 | 2011-04-06 | 積水化学工業株式会社 | Plasma processing equipment |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1164668A (en) * | 1995-06-14 | 1997-11-12 | 株式会社日立制作所 | Liquid crystal display device with wide viewing angle characteristics comprising high resistivity black matrix |
| CN1534331A (en) * | 2003-04-01 | 2004-10-06 | 精工爱普生株式会社 | Liquid crystal device and electronic equipment |
| JP2005265930A (en) * | 2004-03-16 | 2005-09-29 | Mitsubishi Electric Corp | Liquid crystal display device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692762A (en) * | 2012-05-24 | 2012-09-26 | 深圳市华星光电技术有限公司 | Method for manufacturing liquid crystal display panel |
| WO2013174042A1 (en) * | 2012-05-24 | 2013-11-28 | 深圳市华星光电技术有限公司 | Method for manufacturing liquid crystal display panel |
| CN102692762B (en) * | 2012-05-24 | 2014-06-25 | 深圳市华星光电技术有限公司 | Method for manufacturing liquid crystal display panel |
| CN105975120A (en) * | 2016-04-26 | 2016-09-28 | 京东方科技集团股份有限公司 | Touch panel and display apparatus |
| CN106646936A (en) * | 2016-11-02 | 2017-05-10 | 昆山龙腾光电有限公司 | View-angle-switchable liquid crystal display device and driving method |
| CN107238984A (en) * | 2017-08-04 | 2017-10-10 | 京东方科技集团股份有限公司 | Display device, liquid crystal display panel and its driving method |
| US11092853B2 (en) | 2017-08-04 | 2021-08-17 | Boe Technology Group Co., Ltd. | Liquid crystal display panel of advanced super dimension switch mode comprising a pixel electrode, a plurality of first electrodes, and a control electrode, display device and driving method thereof |
| CN108287427A (en) * | 2017-12-04 | 2018-07-17 | 友达光电股份有限公司 | Display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5485742B2 (en) | 2014-05-07 |
| JP2011169982A (en) | 2011-09-01 |
| CN102162949B (en) | 2015-06-24 |
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Effective date of registration: 20211025 Address after: 527-b, 5 / F, building 10, yard a 69, Fushi Road, Haidian District, Beijing Patentee after: Beijing seven day science and Technology Service Center (L.P.) Address before: Chiba, Chiba, Japan Patentee before: Seiko Instruments Inc. |
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