Touch sensor integrated type display device

• US 8,970,524 B2
• Filed: 04/16/2012
• Issued: 03/03/2015
• Est. Priority Date: 08/04/2011
• Status: Expired due to Fees

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kim, Cheolse, Lee, Sunjung, Hwang, Sangsoo
• Primary Examiner(s): Johnson, Gerald
• Application Number:
  US13/448,012
• Publication Number:
  US 20130033439A1
• Time in Patent Office: 1,051 Days
• US Class Current: 345/173
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134318 having a patterned common electrode
• CPC Class Codes: G02F 2201/121 common or background
• 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 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

A touch sensor integrated type display and a method of forming the same are discussed. According to an embodiment, the touch sensor integrated type display device includes a plurality of gate lines and a plurality of data lines formed on a substrate to cross each other; a display area including a plurality of pixel electrodes for displaying images; a common electrode including at least two touch driving electrodes overlapping the plurality of pixel electrodes and at least one touch sensing electrode positioned adjacent to the at least two touch driving electrodes, for recognizing a touch input to the display area; at least one first signal line electrically connected to the at least two touch driving electrodes; and at least one second signal line electrically connected to the at least one touch sensing electrode, and formed over at least one of the data lines.

Claims

1. A touch sensor integrated type display device comprising:

a plurality of gate lines and a plurality of data lines formed on a substrate to cross each other;

a display area including a plurality of pixel electrodes for displaying images;

a common electrode including at least two touch driving electrodes overlapping the plurality of pixel electrodes and at least one touch sensing electrode positioned adjacent to the at least two touch driving electrodes, for recognizing a touch input to the display area;

at least one first signal line electrically connected to the at least two touch driving electrodes; and

at least one second signal line electrically connected to and formed on the at least one touch sensing electrode, and overlapping at least one of the data lines,

wherein the at least one first signal line is disposed parallel to the gate lines, and the at least one second signal line is disposed parallel to the data lines.

2. The touch sensor integrated type display device of claim 1, wherein each of the at least one second signal line is substantially aligned with at least one of the data lines.

3. The touch sensor integrated type display device of claim 1, wherein the at least one second signal line includes a plurality of second signal lines substantially and respectively aligned with the data lines.

4. The touch sensor integrated type display device of claim 1, wherein the at least one touch sensing electrode is disposed between the at least two touch driving electrodes, and

wherein the at least one touch sensing electrode and the at least two touch driving electrodes extend to substantially cover the display area.

5. The touch sensor integrated type display device of claim 1, wherein the at least one second signal line crosses over the at least one first signal line without contacting each other.

6. The touch sensor integrated type display device of claim 1, wherein the at least two touch driving electrodes are formed over the at least one first signal line, and contact the at least one first signal line through at least two contact holes defined by an interlayer dielectric layer formed on the substrate.

7. The touch sensor integrated type display device of claim 1, wherein the at least one first signal line includes a plurality of first signal lines extending parallel to each other, and

wherein the touch sensor integrated type display device further comprises:

a touch driver configured to sequentially supply at least one pulse signal to each of the first signal lines, and

a touch sensing driver configured to sense the touch input by detecting an output of the at least one second signal line in response to the supplied at least one pulse signal.

8. The touch sensor integrated type display device of claim 1, wherein the common electrode and the pixel electrodes control an orientation of liquid crystal cells to display the images.

9. The touch sensor integrated type display device of claim 1, wherein a size and a number of each of the at least one touch sensing electrode and the at least two touch driving electrodes are varied based on a size of a touch area by a finger and a size of the display area.

10. The touch sensor integrated type display device of claim 1, wherein the at least one second signal line is formed directly on the at least one touch sensing electrode.

11. A touch sensor integrated type display device comprising:

a gate line and at least one first signal line formed on a substrate;

a gate insulating layer formed on the gate line;

a data line formed on the gate insulating layer to cross the gate line;

a thin film transistor formed on the gate insulating layer and including a source electrode connected to the data line and a drain electrode;

a pixel electrode formed on the gate insulating layer so that the pixel electrode is connected to the drain electrode of the thin film transistor, and is formed in an area defined by a crossing of the gate line and the data line;

an interlayer dielectric layer formed on the gate insulating layer on which the data line, the thin film transistor, and the pixel electrode are formed;

a common electrode formed on the interlayer dielectric layer, the common electrode including at least two touch driving electrodes and at least one touch sensing electrode separating the at least two touch driving electrodes,

wherein the at least two touch driving electrodes are connected to the at least one first signal line through contact holes defined by the interlayer dielectric layer; and

at least one second signal line electrically connected to and formed on the at least one touch sensing electrode and overlapping the data line,

wherein the at least one first signal line is disposed parallel to the gate line, and the at least one second signal line is disposed parallel to the data line.

12. The touch sensor integrated type display device of claim 11, wherein the at least one second signal line is substantially aligned with at least one data line formed on the gate insulating layer.

13. The touch sensor integrated type display device of claim 11, wherein the at least one second signal line includes a plurality of second signal lines substantially and respectively aligned with a plurality of data lines formed on the gate insulating layer.

14. The touch sensor integrated type display device of claim 11, wherein the at least one touch sensing electrode and the at least two touch driving electrodes extend to substantially cover a display area of the touch sensor integrated type display device.

15. The touch sensor integrated type display device of claim 11, wherein the at least one second signal line crosses over the at least one first signal line without contacting each other.

16. The touch sensor integrated type display device of claim 11, wherein the at least one first signal line includes a plurality of first signal lines, and the at least one second signal line includes a plurality of second signal lines disposed substantially perpendicular to the plurality of first signal lines.

17. The touch sensor integrated type display device of claim 11, wherein the at least one first signal line includes a plurality of first signal lines extending parallel to each other, and

wherein the touch sensor integrated type display device further comprises:

a touch driver configured to sequentially supply at least one pulse signal to each of the first signal lines, and

a touch sensing driver configured to sense a touch input by detecting an output of the at least one second signal line in response to the supplied at least one pulse signal.

18. The touch sensor integrated type display device of claim 11, wherein the common electrode along with the pixel electrode control an orientation of liquid crystal cells to display images.

19. The touch sensor integrated type display device of claim 11, wherein a size and a number of each of the at least one touch sensing electrode and the at least two touch driving electrodes are varied based on a size of a touch area by a finger and a size of a display area of the touch sensor integrated type display device.

20. The touch sensor integrated type display device of claim 11, wherein the at least one second signal line is formed directly on the at least one touch sensing electrode.