CN1959494B - Color dispersing unit, and liquid crystal display device - Google Patents
Color dispersing unit, and liquid crystal display device Download PDFInfo
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- CN1959494B CN1959494B CN200510101036XA CN200510101036A CN1959494B CN 1959494 B CN1959494 B CN 1959494B CN 200510101036X A CN200510101036X A CN 200510101036XA CN 200510101036 A CN200510101036 A CN 200510101036A CN 1959494 B CN1959494 B CN 1959494B
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Abstract
本发明涉及一种彩色分光元件及应用该元件的液晶显示装置。本发明提供的彩色分光元件包括：一光栅，该光栅包括多个光栅单元组，该光栅单元组由至少一光栅单元组成，该光栅单元用以将入射的白光分成红光、绿光和蓝光出射，该光栅所用材料包括压电材料；多个驱动控制单元，其与该多个光栅单元组对应连接，该驱动控制单元使压电材料发生形变从而使得该光栅单元的光栅间距发生变化。本发明的彩色分光元件可以取代彩色滤光片，并实现液晶显示装置彩色化显示。
The invention relates to a color light splitting element and a liquid crystal display device using the element. The color light splitting element provided by the present invention includes: a grating, the grating includes a plurality of grating unit groups, the grating unit group is composed of at least one grating unit, and the grating unit is used to divide the incident white light into red light, green light and blue light for emission The material used for the grating includes a piezoelectric material; a plurality of drive control units are correspondingly connected to the plurality of grating unit groups, and the drive control unit deforms the piezoelectric material so that the grating pitch of the grating unit changes. The color light splitting element of the invention can replace the color filter, and realize the color display of the liquid crystal display device.
Description
[technical field]
The invention relates to a kind of color dispersing unit and adopt the liquid crystal indicator of this color dispersing unit.
[background technology]
Liquid crystal indicator is a kind of passive display device, need provide a kind of color filtering device for reaching the colored effect that shows, this color filtering device can cooperate with other elements such as electrode and liquid crystal panels, realizes that colorize shows.
See also Fig. 1, a kind of color filtering device 1 of prior art comprises: a substrate 10, a plurality of black matrix"s 12 periodically are arranged on this substrate 10, and red filter element 13, green filter element 14, blue filter element 15 and attached to the conductive material 11 on three color-filter elements 13,14 and 15.
Above-mentioned color filtering device 1 will adhere to required red filter element 13, green filter element 14 and blue filter element 15 between a plurality of black matrix"s 12, then adhere to transparent conductive material 11 thereon, wherein this filter element 13,14 and 15 is respectively by processes such as the resin material with redness, green and blue pigment exposes are made.
Irradiate light is to this color filtering device 1, and the pigment effect by red filter element 13, green filter element 14 and blue filter element 15, makes the relevant position emergent ray be respectively ruddiness, green glow and blue light, to reach the optical filtering purpose.Just, light is being done the time spent by the pigment of red filter element 13, green filter element 14 and blue filter element 15, and the light component of light is reduced to some extent, thereby has reduced the brightness that shows.
In addition, above-mentioned color filtering device 1 can't guarantee that above-mentioned color-filter element 13,14 and 15 neatly is distributed in this substrate 10 surfaces successively when making, easily make between the adjacent filter element to cover mutually, produces overlapping region 16, or make between the adjacent filter element spacing excessive, produce the phenomenon of light leak.In addition, in minute protrusions or the depression that the surface of filter element 13,14 and 15 produces, make shade inequality when light passes through this raised or sunken outgoing.
The situation of the shade inequality that color filtering device produces can have a strong impact on the display quality of liquid crystal indicator.
[summary of the invention]
In view of this, provide a kind of bright dipping color uniformity height, color dispersing unit that display brightness is high and liquid crystal indicator are real to be necessary.
A kind of color dispersing unit, comprise: a grating, this grating comprise a plurality of raster unit groups, and this raster unit group is made up of at least one raster unit, this raster unit is divided into ruddiness, green glow and blue light outgoing in order to the white light with incident, and this grating material therefor comprises piezoelectric; A plurality of driving control unit, itself and the corresponding connection of these a plurality of raster unit groups, thus this driving control unit makes piezoelectric generation deformation make the grating space of this raster unit change.
A kind of liquid crystal indicator comprises: a backlight module, and it has a light out part; At least one color dispersing unit is oppositely arranged with this light out part; One liquid crystal panel is arranged on the top of this color dispersing unit.This color dispersing unit comprises a grating, this grating comprises a plurality of raster unit groups of being made up of at least one raster unit, this raster unit is divided into ruddiness, green glow and blue light outgoing in order to the white light with incident, this grating material therefor comprises piezoelectric, a plurality of driving control unit and the corresponding connection of these a plurality of raster unit groups that are used for regulating the grating space of this raster unit.
Compare with prior art, described color dispersing unit utilizes the grating principle, and adopt the optical grating construction of piezoelectric making the white light of incident can be divided into required ruddiness, green glow or blue light, control emergence angle and light quantity that emergent light is ruddiness, green glow or blue light simultaneously.Owing to can control emergence angle and the light quantity that emergent light is ruddiness, green glow or blue light,, the situation that ruddiness, green glow and blue light overlap mutually to be influenced also can not occur, thereby improve display quality so can not make emergent light color depth inequality.In addition, described color dispersing unit carries out beam split to the white light of incident, does not have the loss of light component, thereby has improved display brightness.Described color dispersing unit is by the design optical grating construction and regulates grating space, realize incident light is carried out the emergence angle of beam split and light that control is got, the colored filter that replaces prior art fully can make simultaneously liquid crystal indicator realize colorize.
[description of drawings]
Fig. 1 is a kind of structural representation of prior art colored filter.
Fig. 2 is the structural representation of color dispersing unit of the present invention.
Fig. 3 is that the strip microstructure cross section of color dispersing unit of the present invention is the synoptic diagram of arc.
Fig. 4 is that the strip microstructure cross section of color dispersing unit of the present invention is trapezoidal synoptic diagram.
Fig. 5 is the structural representation of liquid crystal indicator first embodiment of the present invention.
Fig. 6 is the structural representation of liquid crystal indicator second embodiment of the present invention.
Fig. 7 is the structural representation of liquid crystal indicator the 3rd embodiment of the present invention.
[embodiment]
Below in conjunction with accompanying drawing the present invention is described in further detail.
See also Fig. 2, color dispersing unit 2 of the present invention comprises: a substrate 21, is arranged on the grating 22 on this substrate 21, and this grating 22 comprises a plurality of raster unit groups 221, and this raster unit group 221 is made up of at least one raster unit 221 '; Driving control unit 23 ' in a plurality of driving control unit groups 23 and these raster unit group 221 corresponding connections, this driving control unit 23 ' can be regulated the grating space of raster unit 221 '.
Above-mentioned grating 22 comprises a piezoelectric membrane, and material therefor is a piezoelectric, for example titanyl zirconium lead (PZT).At this, grating 22 can further comprise a grating basement membrane, and itself and piezoelectric membrane fit tightly, and this grating basement membrane can be Polyvinylchloride (PVC) film.
Above-mentioned grating 22 is a phase grating.
Above-mentioned raster unit 221 ' is the strip microstructure, as everyone knows, incident light is that white light is divided into ruddiness, green glow, blue light through behind the grating, and triangular energy distribution is decided by the structure of striped microstructure xsect, so, the design of its shape of cross section can determine that the light of being got is any one and the light quantity thereof in ruddiness, green glow or the blue light, and the light quantity that can control the light beam beyond the light of being got simultaneously is a minimum value.The strip microstructure can be the projection or the groove of arbitrary shape, the surface 2211 of strip microstructure is a cambered surface as shown in Figure 3, the xsect of strip microstructure also can be rectangle, trapezoidal, triangle etc., the xsect of strip microstructure is trapezoidal as shown in Figure 4, but the strip microstructure is not limited to above-mentioned situation, as long as the shape in strip microstructure cross section satisfies: can access the light beam that will get is ruddiness, green glow or blue light, and can accesses the light quantity that to get light beam and get final product.In addition, it should be noted that this strip microstructure also can be refractive index different piezoelectric constituted.
Piezoelectric has the characteristic that produces mechanically deform because of effect of electric field, so piezoelectric membrane grating that utilizes piezoelectric to make, or piezoelectric membrane and grating basement membrane fit tightly the grating of composition, because of effect of electric field produces mechanically deform, can control grating space by the size of control electric field simultaneously.So above-mentioned driving control unit 23 ' is controlled the grating space of the raster unit 221 ' that links to each other with driving control unit 23 ' by the raster unit 221 ' of making of piezoelectric is applied electric field.According to grating formula d (sin θ-sin θ
1)=m λ, wherein, d is a grating space, θ is an emergence angle, θ
1Be incident angle, λ is an optical wavelength, and m is an integer, as white light incident angle θ
1When certain and wavelength white light that be made up of ruddiness, green glow, blue light is known, grating space d is an independent variable, then emergence angle θ is exactly a dependent variable, so when white light incides on the raster unit 221 ' at a certain angle, raster unit 221 ' is carried out beam split to incident light, the grating space of regulating raster unit 221 ' this moment is controlled the angle of emergent light, and promptly the angle of the light of being got is mapped on the pixel of liquid crystal indicator thereby control the light of being got.
Driving control unit group 23 comprises at least one driving control unit 23 ', it should be noted that, driving control unit 23 ' can be to connect one to one with raster unit 221 ', but also driving control unit 23 ' and at least one raster unit 221 ' corresponding connection are as long as can control the grating space of pairing raster unit 221 '.
Seeing also Fig. 5, is the structural representation of liquid crystal indicator first embodiment of the present invention.This liquid crystal indicator comprises: a light source 51, one color dispersing units 54, one liquid crystal panels 55, in addition, also adopted a reflector plate 52 in the present embodiment, and reach one and have the wedge type light guide plate 53 of an exiting surface 531, purpose provides a uniform area light source.Wherein, the design of this color dispersing unit 54 is the same with above-mentioned color dispersing unit 2.
In the present embodiment, the corresponding raster unit group of a pixel of liquid crystal panel 55, this raster unit group comprises three adjacent raster units, promptly comprise three adjacent strip microstructures, after being mapped on above-mentioned three strip microstructures from the white light of exiting surface 531 outgoing, above-mentioned three strip microstructures are told ruddiness, green glow and blue light respectively with white light, control the light quantity of ruddiness, green glow and blue light simultaneously, all the other unwanted light beams control it as minimum value by being provided with of strip microstructure shape.Can control ruddiness, green glow and the blue light got by the adjusting grating space shines on the fixed position of respective pixel.
Seeing also Fig. 6, is the structural representation of liquid crystal indicator second embodiment of the present invention.Second embodiment and first embodiment are roughly the same, difference is, the raster unit group comprises nine raster units, promptly comprise nine strip microstructures, a raster unit group outgoing ruddiness, green glow and three kinds of light of blue light and must be by three grating outgoing with a kind of light, a kind of in adjacent three strip microstructure outgoing ruddiness, green glow and the blue lights.One light collecting element 66 is set between color dispersing unit 64 and liquid crystal panel 55, and ruddiness that can raster unit is emitted, green glow and blue light converge to respectively a bit, and the size of this point should be according to the size setting of pixel.The light quantity of ruddiness, green glow and blue light in the present embodiment in the pairing pixel of raster unit group is effectively strengthened.
Seeing also Fig. 7, is the structural representation of liquid crystal indicator the 3rd embodiment of the present invention.The 3rd embodiment and first embodiment are roughly the same, difference is, present embodiment comprises three color dispersing units 74,74 ', 74 that are successively set on the exiting surface 531 ", the light quantity of the pairing ruddiness of pixel, green glow and a blue light is respectively by color dispersing unit 74,74 ', 74 " on a raster unit provide.Being provided with of raster unit can be realized higher pixel display requirement in the present embodiment.
In addition, those skilled in the art also can do other variation in spirit of the present invention.So the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.
Claims (8)
1. color dispersing unit, it is characterized in that comprising: a grating, this grating comprise a plurality of raster unit groups, and this raster unit group is made up of at least one raster unit, this raster unit is divided into ruddiness, green glow and blue light outgoing in order to the white light with incident, and this grating material therefor comprises piezoelectric; A plurality of driving control unit, itself and the corresponding connection of these a plurality of raster unit groups, thus this driving control unit makes piezoelectric generation deformation make the grating space of described raster unit change.
2. color dispersing unit according to claim 1 is characterized in that: described grating is a phase grating.
3. color dispersing unit according to claim 1 is characterized in that: described raster unit is the strip microstructure.
4. color dispersing unit according to claim 3 is characterized in that: described strip microstructure is groove shape or convex.
5. color dispersing unit according to claim 4 is characterized in that: the surface of described strip microstructure is a cambered surface.
6. color dispersing unit according to claim 4 is characterized in that: the xsect of described strip microstructure is rectangle, trapezoidal or triangle.
7. liquid crystal indicator comprises: a backlight module, and it has a light out part; At least one color dispersing unit is oppositely arranged with this light out part; One liquid crystal panel is arranged on the top of this color dispersing unit, it is characterized in that described color dispersing unit comprises any described color dispersing unit in the claim 1 to 6.
8. liquid crystal indicator comprises: a backlight module, and it has a light out part; Three color dispersing units, the three is oppositely arranged with this light out part successively; One liquid crystal panel is arranged on the top of these three color dispersing units, it is characterized in that described color dispersing unit comprises any described color dispersing unit in the claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510101036XA CN1959494B (en) | 2005-11-04 | 2005-11-04 | Color dispersing unit, and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510101036XA CN1959494B (en) | 2005-11-04 | 2005-11-04 | Color dispersing unit, and liquid crystal display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1959494A CN1959494A (en) | 2007-05-09 |
| CN1959494B true CN1959494B (en) | 2011-07-27 |
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| CN200510101036XA Expired - Fee Related CN1959494B (en) | 2005-11-04 | 2005-11-04 | Color dispersing unit, and liquid crystal display device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101676771B (en) * | 2008-09-17 | 2011-07-27 | 财团法人工业技术研究院 | Optical color splitting system and display device using same |
| CN106959518B (en) * | 2016-01-08 | 2020-02-18 | 京东方科技集团股份有限公司 | A display panel and display device |
| CN106299143B (en) * | 2016-09-05 | 2019-03-08 | 京东方科技集团股份有限公司 | A collimated light source, its manufacturing method and display device |
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| CN1959494A (en) | 2007-05-09 |
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