CN202710886U - Liquid crystal device for blocking light - Google Patents
Liquid crystal device for blocking light Download PDFInfo
- Publication number
- CN202710886U CN202710886U CN 201220234241 CN201220234241U CN202710886U CN 202710886 U CN202710886 U CN 202710886U CN 201220234241 CN201220234241 CN 201220234241 CN 201220234241 U CN201220234241 U CN 201220234241U CN 202710886 U CN202710886 U CN 202710886U
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- liquid crystal
- ito
- crystal device
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- electrode
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Abstract
A liquid crystal device for blocking light is used for blocking strong light irradiation. The liquid crystal device is composed of liquid crystals and ITO glass and polarizers, wherein the ITO glass and the polarizers are wrapped and pressed in sequence at two sides of the liquid crystals. Each ITO glass is composed of a glass substrate and an ITO electrode, wherein the ITO electrode is at the inner side of the glass substrate. The inner side of the ITO electrode is provided with a PI coating. After improvement, the ITO electrode of each ITO glass is composed of a plurality of parallel strip-type electrodes, and the strip-type electrodes of two ITO glass are perpendicular to each other. The liquid crystal device is a multi-pixel liquid crystal device, can realize not only complete light blocking but also partitioned light blocking, and is very convenient to use. Besides, the excellent light blocking effect can be obtained by adopting a single layer device, and the manufacturing cost is greatly reduced.
Description
Technical field
The utility model relates to a kind of shading liquid crystal device that is applicable to make light valve, belongs to the display technique field.
Background technology
At present, the shading device that liquid crystal light valve adopts is generally the single-pixel liquid crystal device of whole shading, it comprises two parallel ito glasses (being comprised of glass substrate and ITO electrode), the alignment films of two ito glass inboards (being the PI coating) quadrature friction, liquid crystal between the two is after adding an amount of chirality agent, be orientated with the frictional direction of the contacted position of alignment films along with alignment films, liquid crystal inside then forms 90 ° aligned twisted, and the optical axis of the polaroid in two ito glasses outside is parallel or perpendicular to the alignment film rubbing direction of this side respectively.This liquid crystal device adopts the static drive mode, when not powering up, is bright attitude, add suitable voltage after, meet the requirements of blackness.
The shortcoming of existing shading liquid crystal device is to realize shadowed layer, whole printing opacities, all shadings, greatly limited its range of application, and the driving voltage of this liquid crystal device is higher, voltage reaches 10V well shading when above, want under low-voltage, to obtain desirable shaded effect, then must with two or three stack uses, so not only reduce the transmitance when not powering up, and manufacturing cost is significantly improved.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of shading liquid crystal device that can realize shadowed layer and low cost of manufacture is provided.
The purpose of this utility model realizes with following technical proposals:
A kind of liquid crystal device for shading, by liquid crystal and successively ito glass and the polaroid of double team in the liquid crystal both sides consist of, ito glass is made of glass substrate and inboard ITO electrode thereof, the inboard of ITO electrode is provided with the PI coating, after the improvement, the ITO electrode of every ito glass consists of by a plurality of parallel strip electrodes, and the strip electrode of two ito glasses is mutually vertical.
Above-mentioned liquid crystal device for shading, described liquid crystal is vertical orientated negative liquid crystal, the light shaft positive cross of two polaroids.
Above-mentioned liquid crystal device for shading, the frictional direction of described alignment films is parallel or vertical with the optical axis of homonymy polaroid.
Above-mentioned liquid crystal device for shading, the frictional direction of two alignment films parallel and with the optical axis included angle of this lateral deviation mating plate be 45 °.
The utility model is many pixel liquid crystals device, and both all shadings can realize the subregion shading again, and are very easy to use, and adopts single layer device just can obtain fabulous shaded effect, greatly reduces manufacturing cost.The utility model can be applied to the supervision imaging system of automobile, to block the irradiation of other vehicle head lamps, prevents that high light from making in short-term blinding of imaging system.The utility model sample is tested at the ECS-HomogeneityAngle tester, and the transmitance of visible light is respectively: when blocking, and T=5.46E-3%; When seeing through, T=23.34%.Because only in visible-range, product in use can be in additional one of the product outside to the polarisation of light effect for existing polaroid 〉=the 800nm infrared fileter, filter the infrared light beyond the 800nm, the induction of imaging system only concentrates in the visible-range.
Description of drawings
Fig. 1 is view of the present utility model when not powering up;
Fig. 2 is ITO electrode structure synoptic diagram of the present utility model (being visible area among the figure in the square frame);
Fig. 3 is the frictional direction of alignment films powering state synoptic diagram of the present utility model when parallel or vertical with the optical axis of homonymy polaroid;
Fig. 4 is the parallel and powering state synoptic diagram of the present utility model when being 45 ° with the optical axis included angle of this lateral deviation mating plate of the frictional direction of two alignment films;
Fig. 5 is that the transmitance of liquid crystal is with the curve of change in voltage.
Each label is among the figure: 1, upper polaroid; 2, top glass substrate; 3, upper ITO electrode; 4, upper PI coating; 5, liquid crystal; 6, lower PI coating; 7, lower ITO electrode; 8, lower glass substrate; 9, lower polaroid.
Embodiment
Referring to Fig. 2, ITO electrode of the present utility model is made of a plurality of parallel strip electrodes, and the strip electrode of two ito glasses is mutually vertical, strip electrode when using on ito glass is positive pole, strip electrode on another ito glass is negative pole, and the anodal zone corresponding with negative pole is the viewing area.Therefore, viewing area of the present utility model is the array (zone that double dot dash line surrounds among Fig. 2) that is made of a plurality of little squares or rectangle, and little square or rectangle are a pixel.Utilize the dynamic liquid crystal drive principle, can drive each pixel respectively, the position of occlusion area and size can be selected as requested.Because the gap between adjacent two pixels can not drive, therefore need to use the negativity display mode, namely often deceive pattern.
In order to use low voltage drive, the utility model adopts negative liquid crystal, and the liquid crystal aligning in the liquid crystal display is vertical, the polaroid quadrature, and the birefringence effect of liquid crystal can not be applied to the light of vertical incidence, and light can not be seen through.Be in extremely black state when therefore the shading liquid crystal device does not power up.And alignment films rubbing method have two kinds:
1) quadrature friction, frictional direction is parallel or vertical with the optical axis of this lateral deviation mating plate.Liquid crystal adds an amount of chirality agent, so that when being added to certain voltage, liquid crystal falls down and projection in the horizontal direction forms 90 degree distortions (referring to Fig. 3), and product Δ n * d=0.46-0.53 of the difference Δ n of the thick d of the box of liquid crystal and birefraction, light can see through.Arrive between the transmitance maximum voltage transmitance and voltage linear approximate relationship at threshold voltage.
2) frictional direction is parallel, with the angle of polaroid be 45 °.So that when being added to certain voltage, liquid crystal falls down, liquid crystal twists light at the Δ n of level component, makes light can see through (referring to Fig. 4), and between the transmitance maximum voltage, transmitance and voltage are linear approximate relationships at threshold voltage.
Referring to Fig. 5, the liquid crystal trigger voltage is Vth, and gate voltage is Von, and non-gate voltage is Voff, and the voltage that driving circuit applies the light transmission part is Von, and the voltage that shading light part applies is Voff.Among Fig. 5, transverse axis V is voltage, and longitudinal axis T is transmitance, and the maximum transmission of setting liquid crystal is 100%.
Trigger voltage Vth of the present utility model can accomplish 1-2V, chooses Vth=1.6, Pixel Dimensions 2 * 2mm, and pixel pitch≤40 μ m, the gap portion that can not drive in the light transmission part can not produce on the observing effect of integral body interference, diffraction impact.
Claims (2)
1. liquid crystal device that is used for shading, by liquid crystal (5) and successively double team consist of at the ito glass of liquid crystal (5) both sides and polaroid, ito glass is made of glass substrate and inboard ITO electrode thereof, the inboard of ITO electrode is provided with the PI coating, it is characterized in that, the ITO electrode of every ito glass consists of by a plurality of parallel strip electrodes, and the strip electrode of two ito glasses is mutually vertical.
2. described liquid crystal device for shading according to claim 1 is characterized in that described liquid crystal (5) is vertical orientated negative liquid crystal, the light shaft positive cross of two polaroids.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220234241 CN202710886U (en) | 2012-05-23 | 2012-05-23 | Liquid crystal device for blocking light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220234241 CN202710886U (en) | 2012-05-23 | 2012-05-23 | Liquid crystal device for blocking light |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202710886U true CN202710886U (en) | 2013-01-30 |
Family
ID=47591171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220234241 Expired - Fee Related CN202710886U (en) | 2012-05-23 | 2012-05-23 | Liquid crystal device for blocking light |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202710886U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105459764A (en) * | 2015-12-11 | 2016-04-06 | 贾西平 | Liquid crystal sun shield and preparation method and application thereof |
| CN106526827A (en) * | 2016-12-08 | 2017-03-22 | 深圳市前海打望技术有限公司 | Telescope having mobile payment function and payment method thereof |
-
2012
- 2012-05-23 CN CN 201220234241 patent/CN202710886U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105459764A (en) * | 2015-12-11 | 2016-04-06 | 贾西平 | Liquid crystal sun shield and preparation method and application thereof |
| CN106526827A (en) * | 2016-12-08 | 2017-03-22 | 深圳市前海打望技术有限公司 | Telescope having mobile payment function and payment method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20200523 |