IN CELL TOUCH PANEL AND DISPLAY DEVICE

• US 20160370897A1
• Filed: 06/15/2016
• Published: 12/22/2016
• Est. Priority Date: 06/17/2015
• Status: Abandoned Application

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: ZHAO, Weijie, DONG, Xue, YANG, Shengji, LIU, Yingming
• Application Number:
  US15/182,725
• Publication Number:
  US 20160370897A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• 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 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

The present disclosure provides an in cell touch panel and a display device. The in cell touch panel includes an upper substrate and a lower substrate arranged opposite to each other; a self capacitance electrode between the upper substrate and the lower substrate; a ground electrode corresponding to the self capacitance electrode; and a driving circuit configured to apply a signal to the self capacitance electrode and the ground electrode, wherein the driving circuit is configured to apply a same touch scanning signal to the self capacitance electrode and the ground electrode during a touch phase.

Claims

1. An in cell touch panel comprising:

an upper substrate and a lower substrate arranged opposite to each other;

a self capacitance electrode between the upper substrate and the lower substrate;

a ground electrode corresponding to the self capacitance electrode; and

a driving circuit configured to apply a signal to the self capacitance electrode and the ground electrode,

wherein the driving circuit is configured to apply a same touch scanning signal to the self capacitance electrode and the ground electrode during a touch phase.

2. The in cell touch panel according to claim 1, wherein, the self capacitance electrode is arranged on a side of the upper substrate facing the lower substrate, the ground electrode comprises a common electrode, a data line and a gate line which are arranged on a side of the lower substrate facing the upper substrate, the driving circuit is further configured to apply a common electrode signal to the common electrode, a data signal to the data line and a gate scanning signal to the gate line during a display phase.

3. The in cell touch panel according to claim 2, further comprising a black matrix arranged on one of the side of the upper substrate facing the lower substrate and the side of the lower substrate facing the upper substrate, wherein a projection of the black matrix on the lower substrate overlaps a projection of the self capacitance electrode on the lower substrate.

4. The in cell touch panel according to claim 2, wherein

the self capacitance electrodes are arranged in a matrix manner,

the common electrode is divided into a plurality of block-like common sub-electrodes corresponding to respective self capacitance electrodes.

5. The in cell touch panel according to claim 2, wherein

the self capacitance electrodes are arranged in a matrix manner, the common electrode is divided into a plurality of stripe-like common sub-electrodes corresponding to respective columns of self capacitance electrodes.

6. The in cell touch panel according to claim 2, wherein

the self capacitance electrodes are arranged in a matrix manner, the common electrode is divided into a plurality of stripe-like common sub-electrodes corresponding to respective rows of self capacitance electrodes.

7. The in cell touch panel according to claim 4, further comprising a first connection line arranged on a region corresponding to a block-like self capacitance electrode and connected to the block-like self capacitance electrode through a via hole,

wherein the first connection line and one of the gate line and the data line are isolated from each other, and arranged on the same layer in parallel.

8. The in cell touch panel according to claim 5, further comprising a second connection line arranged on a region corresponding to a strip-like self capacitance electrode and connected to the stripe-like self capacitance electrode through a via hole,

wherein the second connection line and the data line are isolated from each other, and arranged on the same layer in parallel.

9. The in cell touch panel according to claim 6, further comprising a second connection line arranged on a region corresponding to a strip-like self capacitance electrode and connected to the stripe-like self capacitance electrode through a via hole,

wherein the second connection line and the gate line are isolated from each other, and arranged on the same layer in parallel.

10. The in cell touch panel according to claim 1, wherein the self capacitance electrode is arranged on a side of the lower substrate facing the upper substrate and the self capacitance electrode is also used as the common electrode,

the ground electrode comprises a data line and a gate line arranged on a side of the lower substrate facing the upper substrate;

the driving circuit is further configured to apply a common electrode signal to the self capacitance electrode, a data signal to the data line and a gate scanning signal to the gate line during the display phase.

11. The in cell touch panel according to claim 10, wherein each self capacitance electrode is connected to the driving circuit through a corresponding conductive line, the conductive line and the data line is isolated from each other and arranged on the same layer in parallel, and a layer on which the data line is arranged is between a layer on which the self capacitance electrode is arranged and a layer on which the gate line is arranged, the conductive line is connected to the corresponding self capacitance electrode through a via hole.

12. The in cell touch panel according to claim 11, further comprising a plurality of sub-pixels arranged on the side of the lower substrate facing the upper substrate and in a matrix manner,

two gate lines are arranged between adjacent rows of sub-pixels, a pixel group including every two adjacent columns of sub-pixels shares one data line between the two adjacent columns of the sub-pixels, the conductive line is arranged in a gap between adjacent pixel groups.

13. The in cell touch panel according to claim 11, further comprising a third connection line which is arranged a region corresponding to a self capacitance electrode and connected to the self capacitance electrode through a via hole, wherein the third connection line and the data line are isolated and arranged on the same layer in parallel.

14. The in cell touch panel according to claim 11, further comprising a plurality of fourth connection lines which are arranged a region corresponding to a conductive line and connected to the conductive line through via holes, wherein the fourth connection lines and the gate line are isolated and arranged on the same layer, the fourth connection lines and the conductive line are arranged in parallel.

15. The in cell touch panel according to claim 10, wherein each self capacitance electrode is connected to the driving circuit through a corresponding conductive line, the conductive line and the gate line is isolated from each other and arranged on the same layer in parallel, and a layer on which the gate line is arranged is between a layer on which the self capacitance electrode is arranged and a layer on which the data line is arranged, the conductive line is connected to the corresponding self capacitance electrode through a via hole.

16. The in cell touch panel according to claim 15, further comprising a plurality of sub-pixels arranged on the side of the lower substrate facing the upper substrate and in a matrix manner,

two data lines are arranged between adjacent columns of sub-pixels, a pixel group including every two adjacent rows of sub-pixels shares one gate line between the two adjacent rows of the sub-pixels, the conductive line is arranged in a gap between adjacent pixel groups.

17. The in cell touch panel according to claim 15, further comprising a third connection line which is arranged a region corresponding to a self capacitance electrode and connected to the self capacitance electrode through a via hole, wherein the third connection line and the gate line are isolated and arranged on the same layer in parallel.

18. The in cell touch panel according to claim 15, further comprising a plurality of fourth connection lines which are arranged a region corresponding to a conductive line and connected to the conductive line through via holes, wherein the fourth connection lines and the data line are isolated and arranged on the same layer, the fourth connection lines and the conductive line are arranged in parallel.

19. The in cell touch panel according to claim 16, further comprising a plurality of fourth connection lines which are arranged a region corresponding to a conductive line and connected to the conductive line through via holes, wherein the fourth connection lines and the data line are isolated and arranged on the same layer, the fourth connection lines and the conductive line are arranged in parallel.

20. A display device comprising the in cell touch panel according to claim 1.