Touch devices, driving methods therefor, array substrates, and liquid crystal display panels

• US 9,921,675 B2
• Filed: 12/10/2015
• Issued: 03/20/2018
• Est. Priority Date: 05/08/2015
• Status: Active Grant

• Current Assignee: Tianma Microelectronics Company Limited, Xiamen Tianma Micro-Electronics Co., Ltd.
• Original Assignee: Tianma Microelectronics Company Limited, Xiamen Tianma Micro-Electronics Co., Ltd.
• Inventors: Lai, Qingjun, Xie, Huimin
• Primary Examiner(s): Pham, Viet
• Application Number:
  US14/965,781
• Publication Number:
  US 20160328060A1
• Time in Patent Office: 831 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 1/3262 Power saving in digitizer or tablet
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/041661 using detection at multiple resolutions, e.g. coarse and fine scanning; using detection within a limited area, e.g. object tracking window
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G09G 3/00 Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes

Abstract

A touch device includes a plurality of touch electrodes and a touch circuit. The touch electrodes are respectively connected with a plurality of interfaces on the touch circuit by touch detection lines and a switch is provided on the touch detection line corresponding to each of at least one of the touch electrodes. The switch has a first work state in which the switch is turned on and a second work state in which the switch is turned off.

Claims

1. A touch device, comprising:

a plurality of touch electrodes; and

a touch circuit comprising a plurality of interfaces which are in one-to-one correspondence with the plurality of touch electrodes, wherein each of the plurality of touch electrodes is electrically connected to the corresponding one of the plurality of interfaces via a touch detection line,

wherein the plurality of touch electrodes include first touch electrodes and second touch electrodes,

each of the first touch electrodes is electrically connected to the corresponding one of the plurality of interfaces via a first switch, each of the second touch electrodes is electrically connected to the corresponding one of the plurality of interfaces via a second switch, and

in a first work state, the first switches are turned on and the second switches are turned off, in a second work state, the first switches and the second switches are turned on, and a power consumption of the touch device in the first work state is less than that in the second work state.

2. The touch device of claim 1, wherein, at least one of the touch electrodes comprises at least two sub-electrodes electrically insulated from each other, and the at least two sub-electrodes are connected with the interface corresponding to the touch electrode by the touch detection line.

3. The touch device of claim 2, wherein, the at least one of the touch electrodes comprises two sub-electrodes electrically insulated from each other.

4. The touch device of claim 3, wherein, the two sub-electrodes of the touch electrode are arranged symmetrically.

5. The touch device of claim 4, wherein, the two sub-electrodes of the touch electrode are arranged diagonally.

6. The touch device of claim 3, wherein, one of the two sub-electrodes is completely enclosed by the other one of the two sub-electrodes.

7. The touch device of claim 2, wherein, a third switch is provided on the touch detection line corresponding to each of the at least two sub-electrodes.

8. The touch device of claim 2, wherein, a third switch is provided on the touch detection line corresponding to one of two sub-electrodes of each touch electrode.

9. The touch device of claim 2, wherein, the at least two sub-electrodes of each touch electrode are arranged in the same manner.

10. The touch device of claim 2, wherein, each of the first switches and each of the second switches is a thin film transistor.

11. The touch device of claim 1, wherein, the touch electrode is rectangular.

12. A driving method for the touch device of claim 1, comprising:

determining whether the touch device is at the first work state or the second work state;

if it is determined that the touch device is at the first work state, turning on the first switches and turning off the second switches, so that the touch circuit outputs the touch driving signal to first touch electrodes via the first switches; and

if it is determined that the touch device is at the second work state, turning on the first switches and the second switches, so that the touch circuit outputs the touch driving signal to the first touch electrodes via the first switches and to second touch electrodes via the second switches.

13. The driving method of claim 12, wherein, the touch electrodes are divided from a common electrode, and the touch detection line is operable as a connection line to the common electrode;

the driving method further comprising;

in a third work state, turning on the first switches and the second switches, so that the touch circuit outputs a common voltage to the first touch electrodes via the first switches and to second touch electrodes via the second switches.

14. An array substrate, comprising a touch device,

wherein the touch device comprises a plurality of touch electrodes and a touch circuit comprising a plurality of interfaces which are in one-to-one correspondence with the plurality of touch electrodes, wherein each of the plurality of touch electrodes is electrically connected to the corresponding one of the plurality of interfaces via a touch detection line, the plurality of touch electrodes of the touch device are divided from a common electrode of the array substrate,

wherein the plurality of touch electrodes include first touch electrodes and second touch electrodes,

each of the first touch electrodes is electrically connected to the corresponding one of the plurality of interfaces via a first switch, each of the second touch electrodes is electrically connected to the corresponding one of the plurality of interfaces via a second switch, and

in a first work state, the first switches are turned on and the second switches are turned off, in a second work state, the first switches and the second switches are turned on, and a power consumption of the touch device in the first work state is less than that in the second work state.

15. The array substrate of claim 14, wherein, the touch detection line is operable as a connection line to the common electrode.

16. The array substrate of claim 14, wherein each of the first switches and each of the second switches is turned on when the common electrode operates in a display phase.

17. The array substrate of claim 14, wherein the first switches, the second switches, and thin film transistors in the array substrate for controlling orientation of liquid crystal are manufactured in the same manufacturing process.

18. A liquid crystal display panel, comprising:

a color filter substrate; and

an array substrate comprising a touch device,

wherein the touch device comprises a plurality of touch electrodes and a touch circuit comprising a plurality of interfaces which are in one-to-one correspondence with the plurality of touch electrodes,

wherein each of the plurality of touch electrodes is electrically connected to the corresponding one of the plurality of interfaces via a touch detection line, the plurality of touch electrodes of the touch device are divided from a common electrode of the array substrate,

wherein the plurality of touch electrodes include first touch electrodes and second touch electrodes,

each of the first touch electrodes is electrically connected to the corresponding one of the plurality of interfaces via a first switch, each of the second touch electrodes is electrically connected to the corresponding one of the plurality of interfaces via a second switch,

in a first work state, the first switches are turned on and the second switches are turned off, in a second work state, the first switches and the second switches are turned on, and a power consumption of the touch device in the first work state is less than that in the second work state.

19. The liquid crystal display panel of claim 18, wherein, an integrated circuit of the liquid crystal display panel is disposed in a non-display region of the liquid crystal display panel, and the integrated circuit is connected with the touch detection lines.