TOUCH-CONTROLLED ELECTRONIC DEVICE AND METHOD FOR REDUCING WIRELESS SIGNAL INTERFERENCE TO TOUCH SENSING FUNCTION

• US 20130241864A1
• Filed: 03/19/2012
• Published: 09/19/2013
• Est. Priority Date: 03/19/2012
• Status: Active Grant

• Current Assignee: HTC Corporation
• Original Assignee: Tsan-Yuan Chen
• Inventors: Kuan, Tsung-Pao, CHEN, Tsan-Yuan
• Granted Patent: US 8,922,525 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• 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 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment

Abstract

A touch-controlled electronic device with a wireless communication function and a method for reducing wireless signal interference to a touch sensing function are disclosed. The electronic device includes a wireless communication module, a touch sensing module and a synchronous signal interface. By the synchronous signal interface, a synchronous signal is transmitted between the wireless communication module and the touch sensing module and, accordingly, the transmission of the wireless signal is staggered from the timing that receiver electrodes of the touch sensing module receive sensed signals. Thus, wireless signal interference to the touch sensing function of the touch sensing module is suppressed.

Claims

1. A touch-controlled electronic device, comprising:

a wireless communication module, having an antenna for receiving or transmitting a wireless signal;

a touch sensing module, for sensing a touch of an object; and

a synchronous signal interface, coupled between the wireless communication module and the touch sensing module for transmitting a synchronous signal, wherein when the wireless communication module receives or transmits the wireless signal, the touch sensing module stops sensing the touch according to the synchronous signal.

2. The touch-controlled electronic device as claimed in claim 1, wherein the wireless communication module has a wireless communication control chip, the touch sensing module has a touch panel control chip, and the synchronous signal interface is coupled between the wireless communication control chip and the touch panel control chip.

3. The touch-controlled electronic device as claimed in claim 2, wherein the wireless communication control chip and the touch panel control chip each provide at least one general purpose input/output pin electrically connected to each other to form the synchronous signal interface.

4. The touch-controlled electronic device as claimed in claim 1, wherein the wireless communication module is a near field communication device and outputs the synchronous signal in a reader mode or a peer-to-peer mode.

5. The touch-controlled electronic device as claimed in claim 1, wherein the touch sensing module is a projective capacitive touch panel, and the touch sensing module stops sensing the touch by adjusting a scanning timing of the projective capacitive touch panel.

6. The touch-controlled electronic device as claimed in claim 1, wherein the wireless communication module generates the synchronous signal and transmits the synchronous signal to the touch sensing module through the synchronous signal interface when receiving or transmitting the wireless signal.

7. A touch-controlled electronic device, comprising:

a touch sensing module, for sensing a touch of an object;

a wireless communication module, having an antenna for receiving or transmitting a wireless signal; and

a synchronous signal interface, coupled between the touch sensing module and the wireless communication module for transmitting a synchronous signal, wherein when the touch sensing module senses the touch, the wireless communication module stops receiving or transmitting the wireless signal according to the synchronous signal.

8. The touch-controlled electronic device as claimed in claim 7, wherein the touch sensing module contains a touch panel control chip, the wireless communication module contains a wireless communication control chip, and the synchronous signal interface is coupled between the touch panel control chip and the wireless communication control chip.

9. The touch-controlled electronic device as claimed in claim 8, wherein the touch panel control chip and the wireless communication control chip each provide at least one general purpose input/output pin electrically connected to each other to form the synchronous signal interface.

10. The touch-controlled electronic device as claimed in claim 7, wherein the touch sensing module generates the synchronous signal and transmits the synchronous signal to the wireless communication module through the synchronous signal interface when sensing the touch,.

11. The touch-controlled electronic device as claimed in claim 7, wherein the wireless communication module is a near field communication device, which enters a reader mode or a peer-peer mode when the synchronous signal is not transmitted by the synchronous signal interface.

12. A method for reducing wireless signal interference to a touch sensing function in a touch-controlled electronic device, wherein the touch-controlled electronic device has a wireless communication module and a touch sensing module, the method comprising:

receiving or transmitting a wireless signal by the wireless communication module;

transmitting a synchronous signal to the wireless communication module when the touch sensing module senses a touch of an object; and

stopping receiving or transmitting the wireless signal by the wireless communication module according to the synchronous signal.

13. The method as claimed in claim 12, wherein the step of transmitting the synchronous signal to the wireless communication module when the touch sensing module senses the touch of the object further comprises:

generating the synchronous signal and transmitting the synchronous signal to the wireless communication module when the touch sensing module senses the touch.

14. A method for reducing wireless signal interference to a touch sensing function in a touch-controlled electronic device, wherein the touch-controlled device has a wireless communication module and a touch sensing module, the method comprising:

sensing a touch of an object by the touch sensing module;

transmitting a synchronous signal to the touch sensing module when the wireless communication module receives or transmits a wireless signal; and

stopping sensing the touch by the touch sensing module according to the synchronous signal.

15. The method as claimed in claim 14, wherein the touch sensing module is a projective capacitive touch panel and the step of stopping sensing the touch by the touch sensing module according to the synchronous signal further comprises:

stopping the sensing of the touch by adjusting a scanning timing of the projective capacitive touch panel.

16. The method as claimed in claim 14, wherein the step of transmitting the synchronous signal to the touch sensing module when the wireless communication module receives or transmits the wireless signal further comprises:

generating the synchronous signal and transmit the synchronous signal to the touch sensing module when the wireless communication module receives or transmits the wireless signal.