Touch sensor integrated type display device

• US 9,851,825 B2
• Filed: 11/13/2014
• Issued: 12/26/2017
• Est. Priority Date: 11/28/2013
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kim, Cheolse, Hwang, Sangsoo
• Primary Examiner(s): Shen, Yuzhen
• Application Number:
  US14/540,199
• Publication Number:
  US 20150145821A1
• Time in Patent Office: 1,139 Days
• Field of Search: 345174
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• 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 3/0443 using a single layer of sensing electrodes

Abstract

A touch sensor integrated type display device is disclosed. The device includes gate lines and data lines crossing the gate lines. It also includes pixel electrodes disposed in regions defined by crossings of the gate lines and the data lines. Further, the device includes common electrodes overlapping the pixel electrodes. The common electrodes include a group of first electrodes arranged in a first direction, and second electrodes disposed between the first electrodes and extending in a second direction substantially perpendicular to the first direction. The display device additionally includes first electrode connecting wires, each extending in the first direction and connected to a respective one of the first electrodes.

Claims

1. A touch sensor integrated type display device comprising:

a plurality of gate lines and a plurality of data lines crossing the gate lines;

a plurality of pixel electrodes disposed in regions defined by crossings of the gate lines and the data lines;

a plurality of common electrodes in an active area of the display device and overlapping the pixel electrodes, the common electrodes comprising

a first group of first electrodes arranged in a same row in a first direction, and

a plurality of second electrodes, each disposed between two adjacent first electrodes and extending in a second direction substantially perpendicular to the first direction;

a plurality of first electrode connecting wires, each extending in the first direction, each interposed between pixel electrodes in two adjacent rows and connected in the active area to only a corresponding one of the first electrodes in the first group without being connected in the active area to the others of the first electrodes in the first group, at least one of the first electrode connecting wires crossing, without being connected to, at least one of the second electrodes; and

a first routing wire in parallel to the data lines and connecting the first electrode connecting wires with one another outside the active area where the common electrodes are disposed, the first routing wire transmitting a driving signal to the first group of first electrodes.

2. The touch sensor integrated type display device of claim 1, further comprising a plurality of second electrode connecting wires, each extending in the second direction, and overlapping and connected to a respective one of the second electrodes.

3. The touch sensor integrated type display device of claim 1, wherein at least two of the first electrode connecting wires differ in length from each other, and include a shorter first electrode connecting wire and a longer first electrode connecting wire, and

wherein the longer first electrode connecting wire overlaps, without being connected in the active area to, the first electrode connected in the active area to the shorter first electrode connecting wire.

4. The touch sensor integrated type display device of claim 3, further comprising a dummy wire that extends in the first direction from one end of the shorter first electrode connecting wire substantially in parallel with the longer first electrode connecting wire so that a combined length of the dummy wire and the shorter first electrode connecting wire is substantially equal to a length of the longer first electrode connecting wire.

5. The touch sensor integrated type display device of claim 1, further comprising:

a substrate;

a gate insulation film;

thin film transistors near the crossings of the gate lines and data lines; and

a first passivation film covering the thin film transistors,

wherein the first electrode connecting wires and the gate lines are formed over the substrate, each of the first electrode connecting wires being located in proximity to and separated from a corresponding one of the gate lines,

wherein the gate insulation film covers the first electrode connecting wires and the gate lines, and

wherein the first electrodes are formed over the first passivation film, each of the first electrodes being connected to only the corresponding one of the first electrode connecting wires via a first contact hole through the gate insulation film and the first passivation film.

6. The touch sensor integrated type display device of claim 5, further comprising a plurality of second electrode connecting wires,

wherein the second electrodes are formed over the first passivation film, and each of the second electrode connecting wires is formed over and is connected to a respective one of the second electrodes.

7. The touch sensor integrated type display device of claim 6, further comprising a second passivation film over the first electrodes and the second electrodes,

wherein the pixel electrodes are formed over the second passivation film, each of the pixel electrodes being connected to a drain of a respective one of the thin film transistors via a second contact hole through the first passivation film and the second passivation film.

8. The touch sensor integrated type display device of claim 6, wherein the data lines are formed over the gate insulation film, and each of the second electrode connecting wires overlaps a respective one of the data lines.

9. The touch sensor integrated type display device of claim 1, further comprising:

a substrate;

a gate insulation film;

thin film transistors near the crossings of the gate lines and data lines;

a first passivation film covering the thin film transistors; and

a second passivation film formed over the pixel electrodes,

wherein the first electrode connecting wires and the gate lines are formed over the substrate, each of the first electrode connecting wires being located in proximity to and separated from a corresponding one of the gate lines,

wherein the gate insulation film covers the first electrode connecting wires and the gate lines,

wherein the pixel electrodes are formed over the first passivation film, each of the pixel electrodes being connected to a drain of a respective one of the thin film transistors via a first contact hole through the first passivation film, and

wherein the first electrodes are formed over the second passivation film, each of the first electrodes being connected to only the corresponding one of the first electrode connecting wires via a second contact hole through the gate insulation film, the first passivation film, and the second passivation film.

10. The touch sensor integrated type display device of claim 9, further comprising a plurality of second electrode connecting wires,

wherein the data lines are formed over the gate insulation film and are covered by the first passivation film,

wherein the second electrode connecting wires are formed over the second passivation film, each of the second electrode connecting wires overlapping a respective one of the data lines, and

wherein each of the second electrodes covers and is connected to a respective one of the second electrode connecting wires.

11. The touch sensor integrated type display device of claim 1, further comprising a first substrate and a second substrate joined together and facing each other,

wherein the gate lines, the data lines, and the pixel electrodes are disposed on the first substrate, and

wherein the common electrodes are disposed on the second substrate.

12. The touch sensor integrated type display device of claim 1, further comprising a plurality of groups of first electrodes, the first electrodes arranged in a matrix form with each group of the first electrodes arranged in the first direction.

13. The touch sensor integrated type display device of claim 1, wherein the first electrodes are touch driving electrodes, and the second electrodes are touch sensing electrodes.

14. The touch sensor integrated type display device of claim 1, wherein at least one of the first electrode connecting wires overlaps, without being connected in the active area to, at least one of the first electrodes.

15. A touch sensor integrated type display device comprising:

a substrate having an active area and an inactive area;

a plurality of gate lines and a plurality of first electrode connecting wires over the substrate, the first electrode connecting wires extending in a first direction in the active area and connected with one another through a first routing wire in the inactive area, the first routing wire extending in a second direction;

a gate insulation film over the gate lines and the first electrode connecting wires;

a plurality of data lines over the gate insulation film and crossing the gate lines;

a plurality of thin film transistors formed near crossings of the data lines and the gate lines, each of the thin film transistors including a drain over the gate insulation film;

a first passivation film over the thin film transistors, the data lines, and the gate insulation film; and

a plurality of common electrodes in the active area and over the first passivation film, the common electrodes including a plurality of first electrodes arranged in a same row in the first direction and a plurality of second electrodes disposed between the first electrodes and extending in the second direction substantially perpendicular to the first direction,

wherein each of the first electrodes is connected to a respective one of the first electrode connecting wires via a first contact hole through the gate insulation film and the first passivation film, and

wherein, in the active area, at least one of the first electrode connecting wires is connected to only one of the first electrodes without being connected to the others of the first electrodes.

16. The touch sensor integrated type display device of claim 15, further comprising a plurality of second electrode connecting wires extending in the second direction, each being formed over and connected to a respective one of the second electrodes,

wherein each of the second electrode connecting wires overlaps a respective one of the data lines.

17. The touch sensor integrated type display device of claim 16, further comprising:

a second passivation film over the first electrodes and the second electrodes; and

a plurality of pixel electrodes over the second passivation film,

wherein each of the pixel electrodes overlaps a respective one of the common electrodes and is connected to a drain of a respective one of the thin film transistors via a second contact hole through the first passivation film and the second passivation film.

18. The touch sensor integrated type display device of claim 15, wherein the at least one of the first electrode connecting wires overlaps, without being connected in the active area to, at least one of the others of the first electrodes.

19. A touch sensor integrated type display device comprising:

a substrate having an active area and an inactive area;

a plurality of gate lines and a plurality of first electrode connecting wires over the first substrate, the first electrode connecting wires extending in a first direction in the active area and connected with one another through a first touting wire in the inactive area, the first routing wire extending in a second direction;

a gate insulation film over the gate lines and the first electrode connecting wires;

a plurality of data lines over the gate insulation film and crossing the gate lines;

a plurality of thin film transistors formed near crossings of the data lines and the gate lines, each of the thin film transistors including a drain over the gate insulation film;

a first passivation film over the thin film transistors, the data lines, and the gate insulation film;

a plurality of pixel electrodes over the first passivation film, each of the pixel electrodes being connected to a drain of a respective one of the thin film transistors via a first contact hole through the first passivation film;

a second passivation film over the pixel electrodes; and

a plurality of common electrodes in the active area and over the second passivation film, the common electrodes including a plurality of first electrodes arranged in a same row in the first direction and a plurality of second electrodes disposed between the first electrodes and extending in the second direction substantially perpendicular to the first direction,

wherein each of the first electrodes is connected to a respective one of the first electrode connecting wires via a second contact hole through the gate insulation film, the first passivation film, and the second passivation film, and

wherein, in the active area, at least one of the first electrode connecting wires is connected to only one of the first electrodes without being connected to the others of the first electrodes.

20. The touch sensor integrated type display device of claim 19, further comprising a plurality of second electrode connecting wires over the second passivation film and extending in the second direction, each of the second electrode connecting wires overlapping a respective one of the data lines,

wherein each of the second electrodes covers and is connected to a respective one of the second electrode connecting wires.

21. The touch sensor integrated type display device of claim 19, wherein the at least one of the first electrode connecting wires overlaps, without being connected in the active area to, at least one of the others of the first electrodes.