Touch sensor integrated display device

• US 9,639,205 B2
• Filed: 12/28/2015
• Issued: 05/02/2017
• Est. Priority Date: 02/25/2011
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kim, Cheolse, Lee, Buyeol, Lee, Sunjung, Hwang, Sangsoo, Woo, Yoonhwan, Han, Manhyeop
• Primary Examiner(s): Mummalaneni, Nalini
• Application Number:
  US14/981,550
• Publication Number:
  US 20160132166A1
• Time in Patent Office: 491 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134372 for fringe field switching [FFS] where the common electrode is not patterned
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G09G 2354/00 Aspects of interface with display user
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A touch sensor integrated display device is provided comprising gate lines and data lines formed on a substrate to be intersected with each other, a plurality of pixel electrodes formed at intersections between the gate lines and the data lines, and a common electrode formed to overlap the plurality of pixel electrodes through an insulating film disposed between the common electrode and the plurality of pixel electrodes, wherein the common electrode includes at least two touch electrodes, each of which is connected to at least one of signal lines arranged in one of a first direction and a second direction crossing the first direction.

Claims

1. A touch sensitive display device, comprising:

a plurality of gate lines;

a plurality of data lines;

a plurality of touch electrodes arranged in an array of a plurality of rows and columns; and

a plurality of signal lines, all of the signal lines arranged in a first direction, each of the signal lines extending along all the touch electrodes of one corresponding row or one corresponding column of the touch electrodes and connected to a corresponding one of the touch electrodes in said one corresponding row or said one corresponding column of the touch electrodes and not connected to other touch electrodes other than said corresponding one of the touch electrodes in said one corresponding row or said one corresponding column of the touch electrodes, and a common voltage being applied to all the touch electrodes via the signal lines during a display period of the touch sensitive display device, and a touch drive signal being applied to one or more of the touch electrodes via one or more of the signal lines during a touch period of the touch sensitive display device.

2. The touch sensitive display device of claim 1, wherein each of the signal lines extends across an entire length of said one corresponding row or said one corresponding column of the touch electrodes.

3. The touch sensitive display device of claim 1, wherein the first direction is along the gate lines and a second direction is along the data lines, the touch electrodes being arranged in the array along the first direction and the second direction.

4. The touch sensitive display device of claim 1, wherein the first direction is along the data lines and a second direction is along the gate lines, the touch electrodes being arranged in the array along the first direction and the second direction.

5. The touch sensitive display device of claim 1, wherein the touch drive signal is applied to all of the touch electrodes via the signal lines over one or more touch periods of the touch sensitive display device, and a common voltage is applied to all the touch electrodes via the signal lines during each display period of the touch sensitive display device.

6. The touch sensitive display device of claim 5, wherein the touch drive signal is applied to the touch electrodes via the signal lines sequentially over said one or more touch periods of the touch sensitive display device.

7. The touch sensitive display device of claim 1, further comprising a plurality of pixel electrodes at intersections of the gate lines and the data lines, each of the touch electrodes having a size corresponding to two or more of the pixel electrodes.

8. The touch sensitive display device of claim 1, wherein each of the signal lines overlaps with all the touch electrodes of said one corresponding row or said one corresponding column of the touch electrodes.

9. A driver circuit for driving a touch sensitive display device, the touch sensitive display device comprising a plurality of gate lines, a plurality of data lines, a plurality of touch electrodes arranged in an array of a plurality of rows and columns, and a plurality of signal lines, the driver circuit comprising:

first circuitry for generating a common voltage and a touch drive signal; and

second circuitry to apply a common voltage to all the touch electrodes via the signal lines during a display period of the touch sensitive display device and apply a touch drive signal to one or more of the touch electrodes via one or more of the signal lines during a touch period of the touch sensitive display device, all of the signal lines arranged in a first direction, each of the signal lines extending along all the touch electrodes of one corresponding row or one corresponding column of the touch electrodes and connected to a corresponding one of the touch electrodes in said one corresponding row or said one corresponding column of the touch electrodes and not connected to other touch electrodes other than said corresponding one of the touch electrodes in said one corresponding row or said one corresponding column of the touch electrodes.

10. The driver circuit of claim 9, wherein each of the signal lines extends across an entire length of said one corresponding row or said one corresponding column of the touch electrodes.

11. The driver circuit of claim 9, wherein the first direction is along the gate lines and a second direction is along the data lines, the touch electrodes being arranged in the array along the first direction and the second direction.

12. The driver circuit of claim 9, wherein the first direction is along the data lines and a second direction is along the gate lines, the touch electrodes being arranged in the array along the first direction and the second direction.

13. The driver circuit of claim 9, wherein the touch drive signal is applied to all of the touch electrodes via the signal lines over one or more touch periods of the touch sensitive display device, and a common voltage is applied to all the touch electrodes via the signal lines during each display period of the touch sensitive display device.

14. The driver circuit of claim 13, wherein the touch drive signal is applied to the touch electrodes via the signal lines sequentially over said one or more touch periods of the touch sensitive display device.

15. The driver circuit of claim 9, wherein the touch sensitive display device further comprises a plurality of pixel electrodes at intersections of the gate lines and the data lines, each of the touch electrodes having a size corresponding to two or more of the pixel electrodes.

16. The driver circuit of claim 9, wherein each of the signal lines overlaps with all the touch electrodes of said one corresponding row or said one corresponding column of the touch electrodes.

17. A method for driving a touch sensitive display device, the touch sensitive display device comprising a plurality of gate lines, a plurality of data lines, a plurality of touch electrodes arranged in an array of a plurality of rows and a plurality of columns, and a plurality of signal lines, the method comprising:

generating a common voltage and a touch drive signal; and

applying a common voltage to all the touch electrodes via the signal lines during a display period of the touch sensitive display device and applying a touch drive signal to one or more of the touch electrodes via one or more of the signal lines during a touch period of the touch sensitive display device, all of the signal lines arranged in a first direction, each of the signal lines extending along all the touch electrodes of one corresponding row or one corresponding column of the touch electrodes and connected to a corresponding one of the touch electrodes in said one corresponding row or said one corresponding column of the touch electrodes and not connected to other touch electrodes other than said corresponding one of the touch electrodes in said one corresponding row or said one corresponding column of the touch electrodes.

18. The method of claim 17, wherein each of the signal lines extends across an entire length of said one corresponding line of the touch electrodes.

19. The method of claim 17, wherein the first direction is along the gate lines and a second direction is along the data lines, the touch electrodes being arranged in the array along the first direction and the second direction.

20. The method of claim 17, wherein the first direction is along the data lines and a second direction is along the gate lines, the touch electrodes being arranged in the array along the first direction and the second direction.

21. The method of claim 17, wherein the touch drive signal is applied to all of the touch electrodes via the signal lines over one or more touch periods of the touch sensitive display device, and a common voltage is applied to all the touch electrodes via the signal lines during each display period of the touch sensitive display device.

22. The method of claim 21, wherein the touch drive signal is applied to the touch electrodes via the signal lines sequentially over said one or more touch periods of the touch sensitive display device.

23. The method of claim 17, wherein each of the signal lines overlaps with all the touch electrodes of said one corresponding row or said one corresponding column of the touch electrodes.