Touch device and method for driving the same

Patent metadata

Field	Value
Publication number	US-2016246431-A1
Application number	US-201414769143-A
Country	US
Kind code	A1
Filing date	Sep 9, 2014
Priority date	Jun 11, 2014
Publication date	Aug 25, 2016
Grant date	—

Abstract

The present disclosure discloses a touch device and a method for driving the same which is capable of enabling the touch device to operate a higher display refresh rate when there is no touch. The touch device comprises a touch panel, a timing controller, a touch controller, a controller, and a sensor. The sensor is configured to detect whether there is an object contacting or approaching the touch panel, and to output a first indication signal if there is no object contacting or approaching the touch panel and a second indication signal if there is an object contacting or approaching the touch panel. The controller is configured to control the timing controller to output a first display scanning signal when the first indication signal is received and to control the timing controller to output a second display scanning signal when the second indication signal is received. The scanning frequency of the first display scanning signal is higher than that of the second display scanning signal.

First claim

1 . A touch device comprising:
a touch panel configured to display content, to refresh the displayed content according to a display scanning signal, and capable of sensing a touch on the touch panel and cooperating with a touch controller to scan the touch; a timing controller configured to output the display scanning signal to the touch panel; the touch controller configured to scan and locate the touch on the touch panel; a sensor configured to detect whether there is an object contacting or approaching the touch panel, and to output a first indication signal if there is no object contacting or approaching the touch panel and a second indication signal if there is an object contacting or approaching the touch panel; and a controller configured to control the timing controller to output a first display scanning signal when the first indication signal is received and to control the timing controller to output a second display scanning signal when the second indication signal is received, wherein the scanning frequency of the first display scanning signal is higher than that of the second display scanning signal.

2 . The touch device according to claim 1 , wherein the controller is further configured to:
control the touch controller to not operate when the first indication signal is received; and control the touch controller to begin operating when the second indication signal is received.

3 . The touch device according to claim 1 , wherein the sensor comprises transmitters and receivers, and wherein
the transmitters are configured to transmit light waves or sound waves towards proximity of the touch panel; and the receivers are configured to receive the light waves or the sound waves and determine whether there is an object contacting or approaching the touch panel based on the change in the light waves or sound waves.

4 . The touch device according to claim 3 , wherein the number of the transmitters is equal to that of the receivers.

5 . The touch device according to claim 4 , wherein the transmitters are located in four corner areas of the touch panel.

6 . The touch device according to claim 5 , wherein the number of the transmitters is two.

7 . The touch device according to claim 6 , wherein the transmitters are ultrasonic transmitters or infrared transmitters.

8 . The touch device according to claim 4 , wherein the receivers are located in four corner areas of the touch panel.

9 . The touch device according to claim 8 , wherein the receivers are ultrasonic receivers or infrared receivers.

10 . A method for driving a touch device, comprising:
detecting whether there is an object contacting or approaching a touch panel of the touch device, wherein the touch panel is configured to display content, to refresh the displayed content according to a display scanning signal, and is capable of sensing a touch on the touch panel and cooperating with a touch controller to scan the touch; and outputting a second display scanning signal to the touch panel if there is an object contacting or approaching the touch panel, and outputting a first display scanning signal to the touch panel if there is no object contacting or approaching the touch panel, wherein the scanning frequency of the first display scanning signal is higher than that of the second display scanning signal.

11 . The method for driving according to claim 10 , further comprising:
controlling the touch controller to not operate when the first display scanning signal is output; and controlling the touch controller to begin operating when the second display scanning signal is output.

12 . The method for driving according to claim 10 , wherein the detecting of whether there is an object contacting or approaching a touch panel of the touch device further comprises:
transmitting light waves or sound waves towards proximity of the touch panel; and receiving the light waves or the sound waves and determining whether there is an object contacting or approaching the touch panel based on the change in the light wave or sound wave.

Assignees

• Boe Technology Group Co Ltd
• Hefei Xinsheng Optoelectronics Technology Co Ltd

Inventors

• Ma Tao
• Zhang Dayu

Classifications

• G06F3/0436

  in which generating transducers and detecting transducers are attached to a single acoustic waves transmission substrate · CPC title

• G06F2203/04106

  Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection · CPC title

• G06F2203/04101

  2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G06F3/0421 Primary

  by interrupting or reflecting a light beam, e.g. optical touch-screen · CPC title