COLOR FILTER SUBSTRATE AND CAPACITIVE TOUCH SCREEN

• US 20130112542A1
• Filed: 08/28/2012
• Published: 05/09/2013
• Est. Priority Date: 09/09/2011
• Status: Active Grant

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.)
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.)
• Inventors: Chen, Xiaochuan, Wang, Shijun
• Granted Patent: US 8,964,132 B2
• Time in Patent Office: Days
• US Class Current: 200/600
• CPC Class Codes: G02B 5/20 Filters polarising elements G02B5/30
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: H03K 17/9622 using a plurality of detectors, e.g. keyboard

Abstract

The present disclosure relates to a color filter and a capacitive touch screen. Said color filter comprises a substrate; a color filter film formed on the substrate and comprising a plurality of sub-pixel regions; and a sensing layer formed on the substrate and comprising a first metal layer, a second metal layer and an insulting layer located between the first metal layer and the second metal layer. At least one of the first metal layer, the second metal layer and the insulating layer is made of a light shielding material, the light shielding material is projected on the color filter film as a grid and shields the boundaries between respective sub-pixel regions. According to the present disclosure, the number of layers produced is reduced, production process is optimized, and the cost is reduced and the color filter substrate is thinner and lighter compared with the conventional color filter substrate.

Claims

1. A color filter substrate, comprising:

a substrate;

a color filter film formed on the substrate and comprising a plurality of sub-pixel regions; and

a sensing layer formed on the substrate and comprising a first metal layer, a second metal layer and an insulting layer located between the first metal layer and the second metal layer,

wherein at least one of the first metal layer, the second metal layer and the insulating layer is made of a light shielding material, the light shielding material is projected on the color filter film as a grid and shields the boundaries between respective sub-pixel regions.

2. The color filter substrate according to claim 1, wherein both the first metal layer and the second metal layer of the sensing layer are made of said light shielding material.

3. The color filter substrate according to claim 2, wherein the insulating layer of the sensing layer is made of a transparent insulating material.

4. The color filter substrate according to claim 1, wherein a part of the insulating layer of the sensing layer is made of said light shielding material and said light shielding material forms a grid.

5. The color filter substrate according to claim 4, wherein the first metal layer and the second metal layer of the sensing layer are made of a transparent conductive material.

6. The color filter substrate according to claim 1, wherein the first metal layer and a part of the insulating layer of the sensing layer are made of light shielding materials.

7. The color filter substrate according to claim 1, wherein the second metal layer and a part of the insulating layer of the sensing layer are made of light shielding materials.

8. The color filter substrate according to one of claim 1, wherein

the first metal layer is composed of a plurality of first metal stripes aligned with equal spacing in a first direction, the first metal stripe is formed of a plurality of wide portions and a plurality of narrow portions connected alternately and sequentially;

the second metal layer is composed of a plurality of second metal stripes aligned with equal spacing in a second direction perpendicular to the first direction, wherein the second metal strip is formed of a plurality of wide portions and a plurality of narrow portions connected alternately and sequentially;

the first metal stripe and the second metal stripe shield the boundaries between respective sub-pixel regions, the wide portion of the first metal stripe faces a corresponding wide portion of the second metal stripe, and these two wide portions form an upper plate and a lower plate of a capacitor of the sensor respectively, and the narrow portion of the first metal stripe and the narrow portion of the second metal stripe form wires connecting respective capacitors.

9. The color filter substrate according to claim 1, wherein the insulating layer is in a sheet-like shape.

10. The color filter substrate according to claim 1, wherein the sensing layer is located between the substrate and the color filter film.

11. The color filter substrate according to claim 1, wherein the sensing layer and the color filter film are located on the opposite sides of the substrate respectively.

12. A capacitive touch screen, comprising a color filter substrate, the color filter substrate comprising:

a substrate;

a color filter film formed on the substrate and comprising a plurality of sub-pixel regions; and

a sensing layer formed on the substrate and comprising a first metal layer, a second metal layer and an insulting layer located between the first metal layer and the second metal layer,

wherein at least one of the first metal layer, the second metal layer and the insulating layer is made of a light shielding material, the light shielding material is projected on the color filter film as a grid and shields the boundaries between respective sub-pixel regions.

13. The capacitive touch screen according to claim 12, wherein both the first metal layer and the second metal layer of the sensing layer are made of said light shielding material.

14. The capacitive touch screen according to claim 13, wherein the insulating layer of the sensing layer is made of a transparent insulating material.

15. The capacitive touch screen according to claim 12, wherein a part of the insulating layer of the sensing layer is made of said light shielding material and said light shielding material forms a grid.

16. The capacitive touch screen according to claim 15, wherein the first metal layer and the second metal layer of the sensing layer are made of a transparent conductive material.

17. The capacitive touch screen according to claim 12, wherein the first metal layer and a part of the insulating layer of the sensing layer are made of light shielding materials, or

the second metal layer and a part of the insulating layer of the sensing layer are made of light shielding materials.

18. The capacitive touch screen according to claim 12, wherein

the first metal layer is composed of a plurality of first metal stripes aligned with equal spacing in a first direction, the first metal stripe is formed of a plurality of wide portions and a plurality of narrow portions connected alternately and sequentially;

the second metal layer is composed of a plurality of second metal stripes aligned with equal spacing in a second direction perpendicular to the first direction, wherein the second metal strip is formed of a plurality of wide portions and a plurality of narrow portions connected alternately and sequentially;

the first metal stripe and the second metal stripe shield the boundaries between respective sub-pixel regions, the wide portion of the first metal stripe faces a corresponding wide portion of the second metal stripe, and these two wide portions form an upper plate and a lower plate of a capacitor of the sensor respectively, and the narrow portion of the first metal stripe and the narrow portion of the second metal stripe form wires connecting respective capacitors.

19. The capacitive touch screen according to claim 12, wherein the sensing layer is located between the substrate and the color filter film.

20. The capacitive touch screen according to claim 12, wherein the sensing layer and the color filter film are located on the opposite sides of the substrate respectively.