Color filter substrate having resistance-reduced common electrode and liquid crystal display panel made therefrom

Patent metadata

Field	Value
Publication number	US-9519179-B2
Application number	US-201313985289-A
Country	US
Kind code	B2
Filing date	Jun 28, 2013
Priority date	May 24, 2013
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

The present invention discloses a color filter substrate and a liquid crystal panel. The color filter substrate includes a substrate a transparent conductive film, a black array, and an auxiliary conductive layer. Wherein the black array is arranged on the substrate and the transparent conductive film is disposed on the black array. Wherein the auxiliary conductive layer is disposed over a surface of the substrate facing the black array, and has at least portions arranged between the substrate and the black array. By these arrangements, the present invention can effectively reduce the brightness interference of the liquid crystal panel, while increasing the adhesion of the auxiliary conductive layer in addition, this arrangement can effectively avoid the damage to the transparent conductive film by the auxiliary conductive layer.

First claim

The invention claimed is:

1. A color filter substrate including a substrate, a transparent conductive film formed of a first conductive material exhibiting a first electrical resistance, a black array, and an auxiliary conductive layer formed of a second conductive material different from the first conductive material and exhibiting a second electrical resistance that is lower than the first electrical resistance of the transparent conductive film;
wherein the black array is arranged between the substrate and the transparent conductive film;
wherein the auxiliary conductive layer is disposed directly on a surface of the substrate facing the black array and is located in an area under a shadow of the black array on the surface of the substrate, and the auxiliary conductive layer is created by sputter deposition of a metal on the surface of the substrate;
wherein the black array is defined with through holes; and
wherein the transparent conductive film is provided with embossments disposed within the holes of the black array therefore creating an ohm contact with auxiliary conductive layer so as to establish electrical interconnection between the transparent conductive film and the auxiliary conductive layer and combine the transparent conductive film and the auxiliary conductive layer together in such a way that the combination of the transparent conductive film and the auxiliary conductive layer exhibits an electrical resistance that is lower than the first electrical resistance of the transparent conductive film so that the transparent conductive film and the auxiliary conductive layer are respectively on opposite sides of the black array and collectively form a common electrode of the color filter substrate for transmission of an electrical signal and the common electrode has an effective resistance against the transmission of the electrical signal is lower than the first electrical resistance against the electrical signal transmitting through the transparent conductive film and the second electrical resistance against the electrical signal transmitting through the auxiliary conductive layer.

2. The color filter substrate as recited in claim 1 , wherein the metal includes one of copper, aluminum, molybdenum, zinc or silver or any alloy thereof.

3. A color filter substrate including a substrate, a transparent conductive film formed of a first conductive material exhibiting a first electrical resistance, a black array, and an auxiliary conductive layer formed of a second conductive material different from the first conductive material and exhibiting a second electrical resistance that is lower than the first electrical resistance of the transparent conductive film;
wherein the black array is arranged between the substrate and the transparent conductive film;
wherein the auxiliary conductive layer is disposed directly on a surface of the substrate facing the black array, and arranged between the substrate and the black array and located in an area under a shadow of the black array on the surface of the substrate; and
wherein the auxiliary conductive layer is electrically in contact with the transparent conductive film so as to establish electrical interconnection between the transparent conductive film and the auxiliary conductive layer and combine the transparent conductive film and the auxiliary conductive layer together in such a way that the combination of the transparent conductive film and the auxiliary conductive layer exhibits an electrical resistance that is lower than the first electrical resistance of the transparent conductive film so that the transparent conductive film and the auxiliary conductive layer are respectively on opposite sides of the black array and collectively form a common electrode of the color filter substrate for transmission of an electrical signal and the common electrode has an effective resistance against the transmission of the electrical signal is lower than the first electrical resistance against the electrical signal transmitting through the transparent conductive film and the second electrical resistance against the electrical signal transmitting through the auxiliary conductive layer.

4. The color filter substrate as recited in claim 3 , wherein the black array is defined with holes, and the transparent conductive film is provided with embossments which are disposed within the holes so as to create an ohm contact to the auxiliary conductive layer.

5. The color filter substrate as recited in claim 3 , wherein the black array is defined with holes, and the auxiliary conductive layer is provided with embossments which are disposed within the holes so as to create an ohm contact to the transparent conductive film.

6. The color filter substrate as recited in claim 3 , wherein the auxiliary conductive layer is made of a metal.

7. The color filter substrate as recited in claim 6 , the metal includes one of aluminum, molybdenum, zinc or silver or any alloy thereof.

8. A liquid crystal panel including an array substrate, a liquid crystal layer, and a color filter substrate;
wherein the color filter substrate includes a substrate, a transparent conductive film formed of a first conductive material exhibiting a first electrical resistance, a black array, and an auxiliary conductive layer formed of a second conductive material that is different from the first conductive material and exhibiting a second electrical resistance that is lower than the first electrical resistance of the transparent conductive film;
wherein the black array is arranged between the substrate and the transparent film;
wherein the auxiliary conductive layer is disposed directly on a surface of the substrate facing the black array, and arranged between the substrate and the black array and located under a shadow of the black array on the surface of the substrate, wherein the auxiliary conductive layer is electrically in contact with the transparent conductive film so as to establish electrical interconnection between the transparent conductive film and the auxiliary conductive layer and combine the transparent conductive film and the auxiliary conductive layer together in such a way that the combination of the transparent conductive film and the auxiliary conductive layer exhibits an electrical resistance that is lower than the first electrical resistance of the transparent conductive film so that the transparent conductive film and the auxiliary conductive layer are respectively on opposite sides of the black array and collectively form a common electrode of the color filter substrate for transmission of an electrical signal and the common electrode has an effective resistance against the transmission of the electrical signal is lower than the first electrical resistance against the electrical signal transmitting through the transparent conductive film and the second electrical resistance against the electrical signal transmitting through the auxiliary conductive layer; and
wherein the liquid crystal layer is arranged between the transparent conductive film and the array substrate.

9. The liquid crystal panel as recited in claim 8 , wherein the black array is defined with holes, and the transparent conductive film is provided with embossments which are within the holes so as to create an ohm contact to the auxiliary conductive layer.

10. The color filter substrate as recited in claim 8 , wherein the black array is defined with holes, and the auxiliary conductive layer is provided with embossments which are disposed within the holes so as to create an ohm contact to the transparent conductive film.

11. The liquid crystal panel as recited in claim 8 , wherein the auxiliary conductive layer is made of a metal

Assignees

• Shenzhen China Star Optoelect
• Shenzhen China Star Optoelect

Inventors

• Han Bing
• Lo Shih-Hsun
• Liao Zuomin

Classifications

• G02F1/1343

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

• G02F1/133512 Primary

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F2201/121

  common or background · CPC title

• G02B5/201

  in the form of arrays · CPC title

• G02F1/133514

  Colour filters · CPC title