Method for controlling display of electronic device and electronic device using the same

Patent metadata

Field	Value
Publication number	US-9465460-B2
Application number	US-201313897461-A
Country	US
Kind code	B2
Filing date	May 20, 2013
Priority date	May 24, 2012
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

A method for controlling a display of an electronic device is proposed along with the electronic device using the same. The electronic device has the display and a touch sensor disposed on the display. The method includes the following steps. The touch sensor is driven when the display is not driven to display an image. A sensing signal is received from the touch sensor. First information is determined based on the sensing signal. The first information is compared with first predetermined information. The display is driven to display the image when the first information matches the predetermined information.

First claim

What is claimed is:

1. An electronic device, comprising:
a display, configured to display an image;
a touch sensor, integrated with the display and configured to detect a contact on the touch sensor and generate a sensing signal when no image is displayed on the display;
a driving circuitry, coupled to the display and the touch sensor, and configured to partially drive the touch sensor at a first frequency when the display is not driven to display the image and fully drive the touch sensor at a second frequency when the display is driven to display the image, wherein the touch sensor includes a plurality of sensing elements, and a part of the sensing elements of the touch sensor is driven at the first frequency and the other part of the sensing elements of the touch sensor is not driven when no image is displayed on the display;
a sensing circuitry, coupled to the touch sensor to receive the sensing signal generated by the part of the sensing elements of the partially driven touch sensor when no image is displayed on the display and determining a first information based on the received sensing signal generated by the part of the sensing elements of the partially driven touch sensor; and
a processing unit, coupled to the driving circuitry and the sensing circuitry and comparing the first information with a first predetermined information;
wherein when the first information matches the first predetermined information, the driving circuitry drives the display to display the image and drives the part of the sensing elements of the touch sensor and the other part of the sensing elements of the touch sensor at the second frequency, wherein the first frequency is lower than the second frequency.

2. The electronic device of claim 1 , wherein the contact is provided by any combination of one or more finger, a face, a palm, a pen or a hover-based input to the touch sensor.

3. The electronic device of claim 1 , wherein the touch sensor comprises the sensing elements arranged in rows and columns, and the driving circuitry drives a portion of the sensing elements.

4. The electronic device of claim 1 , wherein the sensing signal is generated by the touch sensor when an object touches on the touch sensor or hover above the touch sensor.

5. The electronic device of claim 1 , wherein the first information is determined by calculating the sensing signal over a period of time.

6. The electronic device of claim 1 , wherein the touch sensor comprises the sensing elements arranged in rows and columns, and the driving circuitry partially charges the sensing elements.

7. The electronic device of claim 1 , wherein when the display is driven to display the image, the sensing circuitry receives the sensing signal and determines a second information based on the sensing signal;
the processing unit compares the second information with a second predetermined information; and
the driving circuitry disables the display from displaying the image when the second information matches the second predetermined information.

8. The electronic device of claim 7 , wherein the first predetermined information is the same as the second predetermined information.

9. The electronic device of claim 1 , further comprises a sensor, coupled to the processing unit, sensing a property of an object or an environment external to the electronic device and generating a sensing information based on the sensed property and wherein the processing unit determines whether to drive the touch sensor based on the sensing information when the display is not driven to display the mage.

10. The electronic device of claim 9 , wherein the sensing information is an electrical signal as a function of the property of an object sensed by the sensor or the environment external to the electronic device imposed on the sensor.

11. A method for controlling an electronic device having a display and a touch sensor integrated with the display, comprising:
partially driving the touch sensor at a first frequency when no image is displayed on the display, wherein the touch sensor includes a plurality of sensing elements, and a part of the sensing elements of the touch sensor is driven at the first frequency and the other part of the sensing elements of the touch sensor is not driven when no image is displayed on the display;
receiving a sensing signal generated by the part of the sensing elements of the partially driven touch sensor when no image is displayed on the display;
determining first information based on the sensing signal generated by the part of the sensing elements of the partially driven touch sensor;
comparing the first information with first predetermined information when no image is displayed on the display; and
driving the display to display an image and fully driving the part of the sensing elements of the touch sensor and the other part of the sensing elements of the touch sensor at a second frequency when the first information matches the first predetermined information, wherein the first frequency is lower than the second frequency.

12. The method of claim 11 , wherein the sensing signal is generated by the touch sensor when an object touches on the touch sensor or hover above the touch sensor.

13. The method of claim 11 , wherein the first information is determined by calculating the sensing signal over a period of time.

14. The method of claim 11 , wherein the first information is determined by calculating the sensing signal when an object touches on the touch sensor or hovers above the touch sensor.

15. The method of claim 11 , wherein the step of driving the touch sensor when the display is not driven to display the image comprising driving a portion of the touch sensor to generate the sensing signal.

16. The method of claim 11 , wherein the step of driving the touch sensor when the display is not driven to display the image further comprises partially charging the sensing elements on the touch sensor to generate the sensing signal.

17. The method of claim 11 , wherein after the step of driving the display to display the image, the method further comprises:
receiving the sensing signal from the touch sensor while the display is displaying the image;
determining second information based on the sensing signal;
comparing the second information with second predetermined information; and
disabling the display from displaying the image when the second information matches the second predetermined information.

18. The method of claim 17 , wherein the step of disabling the display from displaying the image comprises disabling a backlight module of the display.

19. The method of claim 17 , wherein the step of disabling the display from displaying comprises controlling a driving circuitry of the electronic device to stop driving the display to display the image.

20. The method of claim 17 , wherein the first predetermined information is the same as the second predetermined information.

21. The method of claim 17 , wherein before the step of receiving the sensing signal from the touch sensor further comprises fully charging the sensing elements on the touch sensor to generate the sensing signal.

22. The method of claim 17 , wherein before the step of receiving the sensing signal from the touch sensor further comprises changing a driving frequency of the touch sensor.

23. The method of claim 11 , further comprises:
sensing a property of an object or an environment external to the electronic device;
generating a se

Assignees

• Htc Corp

Inventors

• Chien Chih-Ling
• Huang Hung-Yi

Classifications

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F3/04883

  for inputting data by handwriting, e.g. gesture or text · CPC title

• G06F1/324

  by lowering clock frequency · CPC title

• H03G7/00

  Volume compression or expansion in amplifiers {(frequency dependent H03G9/025)} · CPC title

• G06F1/1626 Primary

  with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs] · CPC title