Capacitive touch display panel, display device and control device

• US 9,703,427 B2
• Filed: 11/26/2013
• Issued: 07/11/2017
• Est. Priority Date: 12/20/2012
• 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: Zhao, Weijie, Liu, Hongjuan, Dong, Xue, Wang, Haisheng, Yang, Shengji, Liu, Yingming, Ding, Xiaoliang, Ren, Tao
• Primary Examiner(s): Boddie, William
• Assistant Examiner(s): Elnafia, Saifeldin
• Application Number:
  US14/090,186
• Publication Number:
  US 20140176491A1
• Time in Patent Office: 1,323 Days
• Field of Search: 345173, 349 86, 349 96, 349106, 349141
• 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 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G09G 3/36 using liquid crystals
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A capacitive touch display panel comprises an array substrate, a color filter substrate and a liquid crystal layer disposed between the array substrate and the color filter substrate; the array substrate includes a base substrate, a polarizer sheet, black matrixes (BMs) and a thin-film transistor (TFT) functional unit and is disposed on a light emitting side of the display panel; the color filter substrate is disposed on a light incident side of the display panel; the TFT functional unit includes gate lines, data lines, and TFTs; the BMs correspond to the TFTs; and projections of gate electrodes, source electrodes and drain electrodes of the TFTs all fall into the BMs in a direction vertical to the base substrate.

Claims

1. A capacitive touch display panel, comprising an array substrate, a color filter substrate and a liquid crystal layer disposed between the array substrate and the color filter substrate, wherein

the array substrate includes a base substrate, a polarizer sheet, black matrixes (BMs) and a thin-film transistor (TFT) functional unit;

the array substrate is disposed on a light emitting side of the display panel, and the color filter substrate is disposed on a light incident side of the display panel;

the TFT functional unit includes a touch sensing unit comprising a plurality of pre-selected gate lines, a touch drive unit comprising a plurality of pre-selected data lines, and TFTs;

the BMs correspond to the TFTs; and

projections of gate electrodes, source electrodes and drain electrodes of the TFTs all fall into the BMs in a direction vertical to the base substrate,

wherein, in operation, display drive signals are output to all the gate lines and output display data signals to all the data lines and then image display is conducted within a display time period of each frame, and

touch drive signals are output to the data lines of the touch drive unit and touch sensing signals corresponding to the touch drive signals are output to the gate lines of the touch sensing unit within a touch time period of each frame,

the TFT functional unit further comprises a electrode layer and a pixel electrode, the TFT comprises an insulating layer PVX, the common electrode layer is located on the insulation layer PVX, the insulating layer PVX is formed between the array substrate and the common electrode layer and the common electrode layer is an integral electrode for an entire TFT region and is in comb-like configuration in a pixel region, and the data lines and gate lines are disposed between the common electrode layer and the base substrate.

2. The display panel according to claim 1, wherein the BMs are disposed between the base substrate and the TFT functional unit.

3. The display panel according to claim 1, further comprising a protective layer disposed on the light emitting side of the array substrate;

the polarizer sheet is disposed on the light emitting side of the array substrate; and

the BMs are disposed between the protective layer and the polarizer sheet.

4. The display panel according to claim 1, wherein the polarizer sheet is disposed on the light emitting side of the array substrate;

and the BMs are disposed between the polarizer sheet and the base substrate.

5. A display device, comprising the display panel according to claim 1 and a control device for display and touch control of the display panel,

wherein the control device is configured to:

output display drive signals to all the gate lines and output display data signals to all the data lines and then conduct image display within a display time period of each frame, and

output touch drive signals to the data lines of each touch drive unit and corresponding touch sensing signals to the gate lines of each touch sensing unit within a touch time period of each frame.

6. The display device according to claim 5, wherein a predetermined number of data lines are disposed between any two adjacent touch drive units, and there is no signal on the data lines disposed between the adjacent touch drive units within the touch time period of each frame;

and

a predetermined number of gate lines are disposed between any two adjacent touch sensing units, and there is no signal on the gate lines disposed between the adjacent touch sensing units within the touch time period of each frame.

7. A control device for display and touch control of the display panel according to claim 1, the control device comprising:

a display control unit configured to output display drive signals to all the gate lines and output display data signals to all the data lines and then conduct image display, within a display time period of each frame; and

a touch control unit configured to output touch drive signals to the data lines of each touch drive unit and corresponding touch sensing signals to the gate lines of each touch sensing unit within a touch time period of each frame.

8. The control device according to claim 7, wherein a predetermined number of data lines are disposed between any two adjacent touch drive units, and there is no signal on the data lines disposed between the adjacent touch drive units within the touch time period of each frame;

and

a predetermined number of gate lines are disposed between any two adjacent touch sensing units, and there is no signal on the gate lines disposed between the adjacent touch sensing units within the touch time period of each frame.