Liquid crystal display touch screen array substrate and the corresponding liquid crystal display touch screen

• US 9,563,300 B2
• Filed: 01/09/2014
• Issued: 02/07/2017
• Est. Priority Date: 12/26/2013
• Status: Active Grant

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Xu, Xiangyang
• Primary Examiner(s): MERCEDES, DISMERY E
• Application Number:
  US14/240,479
• Publication Number:
  US 20150185930A1
• Time in Patent Office: 1,125 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G02F 1/13318 Circuits comprising a photodetector
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• 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: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
• CPC Class Codes: G09G 5/18 Timing circuits for raster scan displays specially adapted for television H04N ; synchronisation between the display unit and other display units, videodisc player G09G5/12

Abstract

The present invention discloses a liquid crystal display touch screen array substrate, which comprises multiple pixel units defined by a gate line and a data line, each pixel unit is provided with a thin film transistor and a pixel electrode inside; a common electrode line provided in parallel at the side of each said gate line; which further comprise: a touch circuit unit used for touch positioning, the touch circuit unit comprising a touch emission line and a touch sensing line intersecting each other, and a light sensing unit provided at the intersection and respectively connected to the touch emission line and the touch sensing line. The touch emission line is the common electrode line, and the touch sensing line is parallel with the data line. The embodiment of the present invention correspondingly discloses a liquid crystal display touch screen. According to the embodiment of the present invention, it can enhance the sensitivity of the touch position, reduce the power consumption of the touch display screen, and improve the product yield.

Claims

1. A liquid crystal display touch screen array substrate, which comprises multiple pixel units defined by a gate line and a data line, each pixel unit being provided with a thin film transistor and a pixel electrode inside;

wherein, a common electrode line is provided in parallel at the side of each said gate line;

the array substrate further comprising;

a touch circuit unit used for touch positioning, the touch circuit unit comprising a touch emission line and a touch sensing line intersecting each other, and a light sensing unit provided at the intersection and respectively connected to the touch emission line and the touch sensing line, the touch emission line being the common electrode line, and the touch sensing line being parallel with the data line, wherein charges on the touch emission line are conducted to the touch sensing line when the light sensing unit is turned on,

wherein the common electrode line and the gate line utilize synchronous second-order driving signal.

2. The liquid crystal display touch screen array substrate as claimed in claim 1, wherein a voltage difference between the maximum voltage and the minimum voltage of the driving signal of the common electrode line is smaller than that of the gate line.

3. The liquid crystal display touch screen array substrate as claimed in claim 2, wherein the light sensing unit is a photodiode, the photodiode and the active layer of the thin film transistor utilize the same patterning.

4. The liquid crystal display touch screen array substrate as claimed in claim 1, wherein the touch circuit unit is provided on the at least one pixel unit.

5. The liquid crystal display touch screen array substrate as claimed in claim 4, wherein it further comprises an amplifying circuit and a signal processing unit connected with each said touch sensing line.

6. A liquid crystal display touch screen array substrate, which comprises multiple pixel units defined by a gate line and a data line, each pixel unit being provided with a thin film transistor and a pixel electrode inside;

wherein, a common electrode line is provided in parallel at the side of each said gate line;

the array substrate further comprising;

a touch circuit unit used for touch positioning, the touch circuit unit comprising a touch emission line and a touch sensing line intersecting each other, and a light sensing unit provided at the intersection and respectively connected to the touch emission line and the touch sensing line, the touch emission line being the common electrode line, and the touch sensing line being parallel with the data line;

wherein, the common electrode line and the gate line utilize synchronous second-order driving signal, and a voltage difference between the maximum voltage and the minimum voltage of the driving signal of the common electrode line is smaller than that of the gate line, wherein charges on the touch emission line are conducted to the touch sensing line when the light sensing unit is turned on.

7. The liquid crystal display touch screen array substrate as claimed in claim 6, wherein the light sensing unit is a photodiode, the photodiode and the active layer of the thin film transistor utilize the same patterning.

8. The liquid crystal display touch screen array substrate as claimed in claim 7, wherein the touch circuit unit is provided on the at least one pixel unit.

9. The liquid crystal display touch screen array substrate as claimed in claim 7, wherein it further comprises an amplifying circuit and a signal processing unit connected with each said touch sensing line.

10. A liquid crystal display touch screen, comprising:

an array substrate, which comprises multiple pixel units defined by a gate line and a data line, each pixel unit being provided with a thin film transistor and a pixel electrode inside;

a color filter substrate, which is opposite to the array substrate; and

a liquid crystal layer, which is provided between the array substrate and the color filter substrate;

wherein, a common electrode line is provided in parallel at the side of each said gate line;

the array substrate further comprising;

a touch circuit unit used for touch positioning, the touch circuit unit comprising a touch emission line and a touch sensing line intersecting each other, and a light sensing unit provided at the intersection and respectively connected to the touch emission line and the touch sensing line, the touch emission line being the common electrode line, and the touch sensing line being parallel with the data line, wherein charges on the touch emission line are conducted to the touch sensing line when the light sensing unit is turned on,

wherein the common electrode line and the gate line utilize synchronous second-order driving signal.

11. The liquid crystal display touch screen as claimed in claim 10, wherein a voltage difference between the maximum voltage and the minimum voltage of the driving signal of the common electrode line is smaller than that of the gate line.

12. The liquid crystal display touch screen as claimed in claim 11, wherein the light sensing unit is a photodiode, the photodiode and the active layer of the thin film transistor utilize the same patterning.

13. The liquid crystal display touch screen as claimed in claim 12, wherein the touch circuit unit is provided on the at least one pixel unit.

14. The liquid crystal display touch screen as claimed in claim 13, wherein it further comprises an amplifying circuit and a signal processing unit connected with each said touch sensing line.