Color filter substrate and liquid crystal display panel

Patent metadata

Field	Value
Publication number	US-10031366-B2
Application number	US-201514763521-A
Country	US
Kind code	B2
Filing date	Jun 23, 2015
Priority date	Apr 28, 2015
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

The present invention provides a color filter substrate and a liquid crystal display panel. Both comprises a color filter layer ( 11 ) having a plurality of red filters, green filters, blue filters (R, G, B) and color change filters (C) aligned in matrix, and a first transparent electrode ( 41 ) and a second transparent electrode ( 42 ) are respectively positioned at two sides of the color change filter (C), and material of the color change filter (C) is electrochromic material. The color change filter (C) is applied with voltage signals via the first transparent electrode ( 41 ) and the second transparent electrode ( 42 ) to control color change of the color change filter (C) for conveniently achieving high brightness and high color saturation display; as appearing to be transparent, the transmission is high to satisfy the demand of high brightness display; as the color change filter (C) appears to be a specific color which is not red, green, blue, such as cyan, four colors display can be realized to promote the color expression ability to satisfy the demand of high color saturation display.

First claim

What is claimed is:

1. A color filter substrate, comprises a substrate, a color filter layer positioned on the substrate and a protective layer positioned on the color filter layer;
the color filter layer comprises a plurality of red filters, green filters, blue filters and color change filters aligned in matrix and aligned in a same plane, and a first transparent electrode and a second transparent electrode are respectively positioned at two sides of the color change filter; a black matrix separates the plurality of red filters, the green filters, the blue filters and the color change filters aligned in matrix and aligned in the same plane;
material of the color change filter is electrochromic material, and the color change filter is applied with voltage signals via the first transparent electrode and the second transparent electrode to control color change of the color change filter;
wherein before the color change filter is applied with the voltage signals via the first transparent electrode and the second transparent electrode, the color change filter appears to be transparent to achieve high brightness; after the color change filter is applied with the voltage signals via the first transparent electrode and the second transparent electrode, the color change filter appears to be a specific color which is not red, green, blue and black to promote color expression ability for achieving high color saturation;
or before the color change filter is applied with the voltage signals via the first transparent electrode and the second transparent electrode, the color change filter appears to be a specific color which is not red, green, blue and black to promote color expression ability for achieving high color saturation; after the color change filter is applied with the voltage signals via the first transparent electrode and the second transparent electrode, the color change filter appears to be transparent to achieve high brightness;
wherein the protective layer positioned on the color filter layer prevents an interference of the first transparent electrode and the second transparent electrode to pixel electrodes and a common electrode of a liquid crystal display panel as the color filter layer is applied to the liquid crystal display panel.

2. The color filter substrate according to claim 1 , wherein the chromaticity coordinates of the specific color comprises x(0.01˜0.265), y(0.01˜0.710).

3. The color filter substrate according to claim 2 , wherein the specific color is cyan.

4. The color filter substrate according to claim 1 , wherein the electrochromic material comprises one or more of n-type metal oxide, compound based on viologen group, compound based on phthalate, compound based on pyridine, compound based on anthraquinone and cathode decolorized conductive polymer; and further comprises one or more of p-type metal oxide, compound based on aniline, compound based on amino quinones, organic compound based on rare earth elements, compound based on dibenzo-p-dioxins, compound based on dye and anode decolorized conductive polymer.

5. The color filter substrate according to claim 1 , wherein the red filters, the green filters and the blue filters are manufactured by pigment dispersion, dye or ink injection.

6. The color filter substrate according to claim 1 , wherein the first transparent electrode, the color change filter and the second transparent electrode are sequentially stacked on the substrate.

7. A color filter substrate, comprises a substrate, a color filter layer positioned on the substrate and a protective layer positioned on the color filter layer;
the color filter layer comprises a plurality of red filters, green filters, blue filters and color change filters aligned in matrix and aligned in a same plane, and a first transparent electrode and a second transparent electrode are respectively positioned at two sides of the color change filter; a black matrix separates the plurality of red filters, the green filters, the blue filters and the color change filters aligned in matrix and aligned in the same plane;
material of the color change filter is electrochromic material, and the color change filter is applied with voltage signals via the first transparent electrode and the second transparent electrode to control color change of the color change filter;
wherein before the color change filter is applied with the voltage signals via the first transparent electrode and the second transparent electrode, the color change filter appears to be transparent to achieve high brightness; after the color change filter is applied with the voltage signals via the first transparent electrode and the second transparent electrode, the color change filter appears to be a specific color which is not red, green, blue and black to promote color expression ability for achieving high color saturation;
or before the color change filter is applied with the voltage signals via the first transparent electrode and the second transparent electrode, the color change filter appears to be a specific color which is not red, green, blue and black to promote color expression ability for achieving high color saturation; after the color change filter is applied with the voltage signals via the first transparent electrode and the second transparent electrode, the color change filter appears to be transparent to achieve high brightness;
wherein the protective layer positioned on the color filter layer prevents an interference of the first transparent electrode and the second transparent electrode to pixel electrodes and a common electrode of a liquid crystal display panel as the color filter layer is applied to the liquid crystal display panel;
wherein the electrochromic material comprises one or more of n-type metal oxide, compound based on viologen group, compound based on phthalate, compound based on pyridine, compound based on anthraquinone and cathode decolorized conductive polymer; and further comprises one or more of p-type metal oxide, compound based on aniline, compound based on amino quinones, organic compound based on rare earth elements, compound based on dibenzo-p-dioxins, compound based on dye and anode decolorized conductive polymer;
wherein the red filters, the green filters and the blue filters are manufactured by pigment dispersion, dye or ink injection.

8. The color filter substrate according to claim 1 , wherein the chromaticity coordinates of the specific color comprises x(0.01˜0.265), y(0.01˜0.710).

9. The color filter substrate according to claim 8 , wherein the specific color is cyan.

10. The color filter substrate according to claim 7 , wherein the first transparent electrode, the color change filter and the second transparent electrode are sequentially stacked on the substrate.

11. A liquid crystal display panel, comprising an opposite substrate and an array substrate which are oppositely positioned, and a liquid crystal layer filled between the opposite substrate and the array substrate;
the opposite substrate or the array substrate further comprises a color filter layer and a protective layer positioned on the color filter layer; the color filter layer comprises a plurality of red filters, green filters, blue filters and color change filters aligned in matrix and aligned in a same plane, and a first transparent electrode and a second transparent electrode are respectively positioned at two sides of the color change filter; a black matrix separates the plurality of red filters, the green filters, the blue filters and the color change filters aligned in matrix and aligned in the same plane;
material of the color change filter is electrochromic material, and the color change filter is applied with voltage sig

Assignees

• Shenzhen China Star Optoelect

Inventors

• Yu Xiaoping

Classifications

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G02F1/133514 Primary

  Colour filters · CPC title

• G02F1/1343

  Electrodes {(reflective electrodes G02F1/133553)} · CPC title

• G02B5/201

  in the form of arrays · CPC title

• G02B5/223

  containing organic substances, e.g. dyes, inks or pigments · CPC title