Touch display panel, touch display device and method for driving the same

Patent metadata

Field	Value
Publication number	US-10198115-B2
Application number	US-201615325318-A
Country	US
Kind code	B2
Filing date	May 9, 2016
Priority date	Jun 10, 2015
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

A touch display panel is provided. The touch display panel includes a first substrate, and a second substrate opposite to the first substrate. The first substrate includes a base substrate, and an anode, an organic light emitting layer and a cathode formed on the base substrate. The cathode includes a plurality of first sub-electrodes, each of the plurality of first sub-electrodes is used as a touch electrode and applied with a touch scanning signal during a touch scanning stage and is used as a common electrode and applied with a common electrode signal during a display stage. The first substrate further includes a driving electrode layer disposed between the anode and the base substrate, the driving electrode layer is applied with the touch scanning signal during the touch scanning stage.

First claim

What is claimed is:

1. A touch display panel, comprising a first substrate and a second substrate opposite to each other, wherein
the first substrate comprises a base substrate; and an anode, an organic light emitting layer and a cathode formed on the base substrate,
the cathode comprises a plurality of first sub-electrodes, each of the plurality of first sub-electrodes is used as a touch electrode and applied with a touch scanning signal during a touch scanning stage and is used as a common electrode and applied with a common electrode signal during a display stage, and
the first substrate further comprises a driving electrode layer and a thin film transistor,
the thin film transistor is located between the anode and the base substrate, and comprises a gate electrode, a source electrode and a drain electrode,
the driving electrode layer is applied with the touch scanning signal during the touch scanning stage,
the driving electrode layer is disposed between the gate electrode of the thin film transistor and the base substrate, and the driving electrode layer is in direct contact with the gate electrode of the thin film transistor.

2. The touch display panel according to claim 1 , further comprising:
a driving integrated circuit (IC), configured to generate the touch scanning signal and the common electrode signal in a time division manner,
wherein each of the plurality of first sub-electrodes of the cathode is connected with the driving IC through a first wire.

3. The touch display panel according to claim 2 , wherein the first wire is formed at a same layer and of a same material as the first sub-electrodes of the cathode, and is formed in a gap between the first sub-electrodes.

4. The touch display panel according to claim 2 , wherein the first wire is disposed in a layer under the first sub-electrode of the cathode.

5. The touch display panel according to claim 4 , wherein
the first wire comprises a first sub-wire and a second sub-wire,
the first sub-wire is connected with the driving IC, and
the second sub-wire connects the first sub-electrode and the first sub-wire.

6. The touch display panel according to claim 5 , wherein the first sub-wire is formed of a same material as a data line.

7. The touch display panel according to claim 5 , wherein the first sub-wire is formed at a same layer and of a same material as the gate electrode.

8. The touch display panel according to claim 5 , wherein the first sub-wire is formed at a same layer and of a same material as the source electrode and the drain electrode.

9. The touch display panel according to claim 5 , wherein the second sub-wire penetrates a layer between the first sub-wire and the first sub-electrode.

10. The touch display panel according to claim 5 , wherein
the anode comprises a plurality of second sub-electrodes having gaps therebetween, and
the first sub-wire is formed at a same layer and of a same material as the anode, and is formed in the gap between the second sub-electrodes.

11. The touch display panel according to claim 8 , wherein
the anode comprises a plurality of second sub-electrodes having gaps therebetween, and
a position where the first wire penetrates a layer at which the anode exists is in the gap between the second sub-electrodes.

12. A touch display device, comprising the touch display panel according to claim 1 .

13. A method for driving the touch display device according to claim 12 , comprising:
applying the common electrode signal to each of the plurality of first sub-electrodes of the first substrate in response to the touch display device being operated during the display stage; and
applying the touch scanning signal to each of the plurality of first sub-electrodes and the driving electrode layer of the first substrate in response to the touch display device being operated during the touch scanning stage.

14. The touch display device according to claim 12 , further comprising:
a driving integrated circuit (IC), configured to generate the touch scanning signal and the common electrode signal in a time division manner,
wherein each of the plurality of first sub-electrodes of the cathode is connected with the driving IC through a first wire.

15. The touch display device according to claim 14 , wherein the first wire is formed at a same layer and of a same material as the first sub-electrodes of the cathode, and is formed in a gap between the first sub-electrodes.

16. The touch display device according to claim 14 , wherein the first wire is disposed in a layer under the first sub-electrode of the cathode.

17. The touch display device according to claim 16 , wherein
the first wire comprises a first sub-wire and a second sub-wire,
the first sub-wire is connected with the driving IC, and
the second sub-wire connects the first sub-electrode and the first sub-wire.

18. The touch display device according to claim 17 , wherein the first sub-wire is formed of a same material as a data line.

19. A touch display panel comprising:
a first substrate and a second substrate opposite to each other;
the first substrate comprising a base substrate, an anode, an organic light emitting layer and a cathode formed on the base substrate,
the cathode comprising a plurality of first sub-electrodes, each of the first sub-electrodes comprising a touch electrode applied with a touch scanning signal during a touch scanning stage and comprising a common electrode applied with a common electrode signal during a display stage,
the first substrate further comprising a driving electrode layer and a thin film transistor,
the thin film transistor disposed between the anode and the base substrate, the thin film transistor comprising a gate electrode, a source electrode and a drain electrode,
the driving electrode layer applied with the touch scanning signal during the touch scanning stage,
the driving electrode layer disposed between the gate electrode and the base substrate, and the driving electrode layer is in direct contact with the gate electrode of the thin film transistor.

20. The touch display panel according to claim 1 , further comprising:
a driving integrated circuit (IC), configured to generate the touch scanning signal and the common electrode signal in a time division manner,

wherein each of the plurality of first sub-electrodes of the cathode is connected with the driving IC through a first wire.

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Optoelectronics Tech Co Ltd

Inventors

• Yang Shengji
• Dong Xue
• Wang Haisheng
• Chen Xiaochuan
• Zhao Weijie
• Liu Yingming
• Meng Chen
• Dong Ruijun
• Xu Rui
• Liu Wei
• Li Changfeng

Classifications

• G06F3/044

  by capacitive means · CPC title

• G06F3/0416 Primary

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F3/04166

  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 title