Touch display device and method for manufacturing the same

• US 10,234,711 B2
• Filed: 08/02/2017
• Issued: 03/19/2019
• Est. Priority Date: 08/04/2016
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd., Chengdu BOE Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Original Assignee: BOE Technology Group Co., Ltd., Chengdu BOE Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Inventors: Liao, Xiaogang
• Primary Examiner(s): Jansen, II, Michael J
• Application Number:
  US15/666,630
• Publication Number:
  US 20180039129A1
• Time in Patent Office: 594 Days
• CPC Class Codes: G02F 1/133334 Electromagnetic shields
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133382 Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• 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

Abstract

A touch display device includes a first substrate and a second substrate disposed opposite to each other, wherein a touch functional layer and a conductive layer are insulated from each other and are disposed on the second substrate. The conductive layer is disposed between the touch function layer and the first substrate; and the conductive layer serves as a heating layer in a first state and serves as a shield layer in a second state.

Claims

1. A touch display device comprising:

a first substrate and a second substrate disposed opposite to each other;

wherein a touch functional layer and a conductive layer are insulated from each other and are disposed on the second substrate, the conductive layer is disposed between the touch function layer and the first substrate; and

the conductive layer is configured as a heating layer in a first state and is configured as a shield layer in a second state;

a control device electrically connected to the conductive layer and the touch function layer respectively;

a first temperature sensor provided outside the touch display device and a second temperature sensor provided inside the touch display device, the control device being electrically connected to the first temperature sensor and the second temperature sensor respectively;

the first temperature sensor being configured to monitor an ambient temperature, and the second temperature sensor being configured to monitor a temperature of the touch display device;

the control device being configured such that when the ambient temperature is lower than or equal to a first threshold and the temperature of the touch display device is lower than a second threshold, the control device controls the conductive layer to be applied with a voltage to heat the touch display device; and

when the ambient temperature is higher than the first threshold, the control device controls the conductive layer to be grounded to shield the touch function layer from electromagnetic interference.

2. The touch display device of claim 1, wherein the conductive layer is configured as a heating layer to heat the touch display device when an ambient temperature is lower than or equal to the first threshold and a temperature of the touch display device is lower than the second threshold;

and the conductive layer is configured as a shield layer to shield the touch function layer from electromagnetic interference when the ambient temperature is higher than the first threshold, the first threshold being less than the second threshold.

3. The touch display device of claim 1, wherein the conductive layer and the touch functional layer are formed on a same side of the second substrate, and a conductive layer is disposed between the second substrate and the touch function layer.

4. The touch display device of claim 2, wherein the conductive layer and the touch functional layer are formed on a same side of the second substrate, and a conductive layer is disposed between the second substrate and the touch function layer.

5. The touch display device of claim 1, wherein the conductive layer is disposed on a side of the second substrate facing the first substrate, and the touch function layer is disposed on a side of the second substrate facing away from the first substrate.

6. The touch display device of claim 2, wherein the conductive layer is disposed on a side of the second substrate facing the first substrate, and the touch function layer is disposed on a side of the second substrate facing away from the first substrate.

7. The touch display device of claim 3, wherein the conductive layer is a transparent conductive layer.

8. The touch display device of claim 3, wherein the conductive layer is a non-transparent conductive layer and has a vertical projection on the second substrate which is coincident with a vertical projection of the black matrix on the second substrate.

9. The touch display device of claim 2, wherein the touch display device further comprises a control device electrically connected to the conductive layer and the touch function layer respectively;

when the ambient temperature is lower than or equal to the first threshold and the temperature of the touch display device is lower than the second threshold, the control device controls the conductive layer to be applied with a voltage to heat the touch display device; and

when the ambient temperature is higher than the first threshold, the control device controls the conductive layer to be grounded to shield the touch function layer from the electromagnetic interference.

10. The touch display device of claim 1, wherein the control device is further configured to control the conductive layer to stop heating the touch display device when the temperature of the touch display device is higher than a third threshold, wherein the third threshold is greater than the first threshold and is greater than the second threshold.

11. The touch display device of claim 10, wherein the first threshold is less than the second threshold;

and the second threshold is less than the third threshold.

12. The touch display device of claim 11, wherein the first threshold is −

10°

C., the second threshold is 20°

C., and the third threshold is 30°

C.

13. A manufacturing method for a touch display device comprising:

providing the touch display device having a first substrate and a second substrate disposed opposite each other; and

forming a touch functional layer and a conductive layer on the second substrate, wherein the touch functional layer and the conductive layer are insulated from each other;

wherein a touch functional layer and a conductive layer are disposed on the second substrate, the conductive layer is disposed between the touch functional layer and the first substrate; and

the conductive layer is configured as a heating layer in a first state and is configured as a shield layer in a second state;

providing a control device electrically connected to the conductive layer and the touch function layer respectively;

providing a first temperature sensor outside the touch display device and a second temperature sensor inside the touch display device, and the control device is electrically connected to the first temperature sensor and the second temperature sensor respectively;

configuring the first temperature sensor to monitor the ambient temperature, and configuring the second temperature sensor to monitor the temperature of the touch display device;

configuring the control device such that when the ambient temperature is lower than or equal to a first threshold and the temperature of the touch display device is lower than a second threshold, the control device controls the conductive layer to be applied with a voltage to heat the touch display device; and

when the ambient temperature is higher than the first threshold, the control device controls the conductive layer to be grounded to shield the touch function layer from electromagnetic interference.

14. The manufacturing method of claim 13, wherein the forming the touch functional layer and a conductive layer insulated from each other on the second substrate comprises:

forming the conductive layer and the touch functional layer successively on a same side of the second substrate.

15. The manufacturing method of claim 13, wherein the forming the touch functional layer and a conductive layer insulated from each other on the second substrate comprises:

forming the conductive layer on a side of the second substrate facing the first substrate, and forming the touch function layer on a side of the second substrate facing away from the first substrate.

16. The manufacturing method of claim 14, wherein the forming the conductive layer and the touch functional layer successively on a same side of the second substrate comprises forming the conductive layer, forming an insulating layer on the conductive layer and forming the touch functional layer.