Color filter substrate to be disposed opposite to an array substrate and manufacturing method thereof

• US 9,778,793 B2
• Filed: 11/01/2013
• Issued: 10/03/2017
• Est. Priority Date: 07/18/2013
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd., Hefei BOE Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Original Assignee: BOE Technology Group Co., Ltd., Hefei BOE Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Inventors: Xu, Xiangyang
• Primary Examiner(s): Amadiz, Rodney
• Application Number:
  US14/436,916
• Publication Number:
  US 20150234538A1
• Time in Patent Office: 1,432 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/042 by opto-electronic means
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen
• CPC Class Codes: Y10T 29/49155 Manufacturing circuit on or in base

Abstract

The present invention discloses a color filter substrate and a manufacturing method thereof and a touch screen. The color filter substrate comprises a substrate and a black matrix arranged thereon, the black matrix defines a plurality of pixel units, in each of which a color filter is arranged; the color filter substrate further comprises light sensing units as well as touch scan lines and touch sensing lines insulated from each other, the light sensing units are positioned in the pixel units; the light sensing units, the touch scan lines and the touch sensing lines are arranged in areas corresponding to the black matrix; and each light sensing unit is connected with one touch scan line and one touch sensing line and is positioned on one side of the black matrix that can receive external light.

Claims

1. A color filter substrate to be disposed opposite to an array substrate comprising gate lines and data lines, comprising a substrate and a black matrix arranged on the substrate, wherein the black matrix defines a plurality of pixel units, in each of which a color filter is arranged;

the color filter substrate further comprises light sensing units, touch scan lines and touch sensing lines, the touch scan lines and touch sensing lines are insulated from each other, and the light sensing units are positioned in the pixel units;

the light sensing units, the touch scan lines and the touch sensing lines are arranged in areas corresponding to the black matrix; and

each light sensing unit is connected with one touch scan line and one touch sensing line and is positioned on one side of the black matrix capable of receiving external light.

2. The color filter substrate of claim 1, wherein each light sensing unit has an integrated structure;

and when the light sensing unit is irradiated by specific light, the light sensing unit enables the touch scan line to be connected to the touch sensing line.

3. The color filter substrate of claim 2, wherein a timing pulse signal is applied to the touch scan line;

the touch sensing line outputs a pulse signal having the same time sequence as the timing pulse signal on the touch scan line when the touch scan line and the touch sensing line are connected by the light sensing unit.

4. The color filter substrate of claim 3, wherein the light sensing units are photosensitive semiconductors.

5. The color filter substrate of claim 4, wherein each color filter comprises a red color filter area, a green color filter area and a blue color filter area, and the light sensing unit is arranged in the blue color filter area.

6. The color filter substrate of claim 3, wherein each color filter comprises a red color filter area, a green color filter area and a blue color filter area, and the light sensing unit is arranged in the blue color filter area.

7. The color filter substrate of claim 2, wherein the light sensing units are photosensitive semiconductors.

8. The color filter substrate of claim 7, wherein each color filter comprises a red color filter area, a green color filter area and a blue color filter area, and the light sensing unit is arranged in the blue color filter area.

9. The color filter substrate of claim 2, wherein each color filter comprises a red color filter area, a green color filter area and a blue color filter area, and the light sensing unit is arranged in the blue color filter area.

10. The color filter substrate of claim 1, wherein each pixel unit is provided therein the light sensing unit, or the light sensing units are arranged in the pixel units having intervals therebetween.

11. The color filter substrate of claim 10, wherein the light sensing units are photosensitive semiconductors.

12. The color filter substrate of claim 10, wherein each color filter comprises a red color filter area, a green color filter area and a blue color filter area, and the light sensing unit is arranged in the blue color filter area.

13. The color filter substrate of claim 1, wherein the light sensing units are photosensitive semiconductors.

14. The color filter substrate of claim 13, wherein each color filter comprises a red color filter area, a green color filter area and a blue color filter area, and the light sensing unit is arranged in the blue color filter area.

15. The color filter substrate of claim 1, wherein each color filter comprises a red color filter area, a green color filter area and a blue color filter area, and the light sensing unit is arranged in the blue color filter area.

16. A touch screen, comprising an array substrate and a color filter substrate opposite to each other, wherein the color filter substrate is the color filter substrate of claim 1.

17. The touch screen of claim 16, further comprising a signal applying unit and a signal processing unit, wherein

the signal applying unit is configured to apply touch scan signals to the touch scan lines;

and

the signal processing unit is configured to receive and process touch sensing signals in the touch sensing lines.

18. The touch screen of claim 17, wherein both the signal applying unit and the signal processing unit are arranged on the color filter substrate, the signal applying unit is connected with the touch scan lines, and the signal processing unit is connected with the touch sensing lines.

19. The touch screen of claim 17, wherein both the signal applying unit and the signal processing unit are arranged on the array substrate, the signal applying unit is connected with the touch scan lines through a flexible printed circuit board, and the signal processing unit is connected with the touch sensing lines through a flexible printed circuit board.

20. A manufacturing method of a color filter substrate to be disposed opposite to an array substrate comprising gate lines and data lines, comprising steps of:

forming touch scan lines on a substrate;

forming touch sensing lines on the substrate, wherein the touch scan lines and the touch sensing lines are insulated from each other;

forming light sensing units on the substrate, wherein the light sensing units are connected with the touch scan lines and the touch sensing lines; and

forming a black matrix and color filters on the substrate, wherein the black matrix defines a plurality of pixel units, in each of which a color filter is arranged, the light sensing units are positioned in the pixel units, the light sensing units, the touch scan lines and the touch sensing lines are arranged in areas corresponding to the black matrix, and the light sensing units are positioned on one side of the black matrix capable of receiving external light.