TOUCH PANEL AND DISPLAY DEVICE INCLUDING THE SAME

• US 20150185892A1
• Filed: 11/04/2014
• Published: 07/02/2015
• Est. Priority Date: 12/27/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: CHAE, Min Ho
• Granted Patent: US 9,746,947 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04104 Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
• CPC Class Codes: G06F 2203/04106 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 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 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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

Abstract

A touch panel and display device including the same are disclosed. In one aspect, the touch panel includes an insulation substrate having a length and a width and a first sensing electrode pattern formed over the insulation substrate and including a plurality of first sensing electrodes and a plurality of first connection portions connecting the first sensing electrodes to each other in a first direction. A second sensing electrode pattern is formed over the insulation substrate and includes a plurality of second sensing electrodes, wherein the first and second sensing electrodes are alternately arranged. The touch panel also includes a plurality of second connection portions substantially overlapping the first connection portions and connecting the second sensing electrodes to each other in a second direction crossing the first direction. The first and second directions are inclined with respect to the length and width of the insulation substrate.

Claims

1. A touch panel, comprising:

an insulation substrate having an area;

a first sensing electrode pattern formed over the insulation substrate and including i) a plurality of first sensing electrodes and ii) a plurality of first connection portions connecting the first sensing electrodes to each other in a first direction;

a second sensing electrode pattern formed over the insulation substrate and including a plurality of second sensing electrodes, wherein the first and second sensing electrodes are alternately arranged; and

a plurality of second connection portions substantially overlapping the first connection portions and connecting the second sensing electrodes to each other in a second direction crossing the first direction,

wherein the second connection portions are electrically insulated from the first connection portions, and

wherein the first and second directions are inclined with respect to the area dimensions of the insulation substrate.

2. The touch panel of claim 1, wherein the second connection portions are grouped into pairs and wherein each of the pairs of second connection portions connects two of the second sensing electrodes that are adjacent to each other.

3. The touch panel of claim 2, wherein the first and second sensing electrode patterns are formed of a conductive nanowire or a transparent conductive material.

4. The touch panel of claim 3, wherein each of the second connection portions is formed of metal.

5. The touch panel of claim 2, wherein each of the first connection portions extends in the first direction and wherein each of the second connection portions extends in the second direction.

6. The touch panel of claim 2, wherein the width of each of the first connection portions measured in the second direction is greater than the sum of the widths of each of the pairs of second connection portions measured in the first direction.

7. The touch panel of claim 1, further comprising an interlayer insulating layer electrically insulating the second connection portions from the first connection portions.

8. The touch panel of claim 7, wherein the interlayer insulating layer covers each of the first connection portions and partially covers the second sensing electrodes.

9. The touch panel of claim 7, wherein the interlayer insulating layer covers the first and second sensing electrode patterns and has a plurality of contact holes formed above the second sensing electrodes.

10. The touch panel of claim 1, wherein two sides of each of the first sensing electrodes are substantially parallel to the first direction and wherein two sides of each of the second sensing electrodes are substantially parallel to the second direction.

11. A display device, comprising:

a display panel; and

a touch panel formed over the display panel,

wherein the touch panel includes;

an insulation substrate having a length and a width;

a first sensing electrode pattern formed over the insulation substrate and including i) a plurality of first sensing electrodes and ii) a plurality of first connection portions connecting the first sensing electrodes to each other in a first direction;

a second sensing electrode pattern formed over the insulation substrate and including a plurality of second sensing electrodes, wherein the first and second sensing electrodes are alternately arranged; and

a plurality of second connection portions substantially overlapping the first connection portions and connecting the second sensing electrodes to each other in a second direction substantially perpendicular to the first direction,

wherein the second connection portions are electrically insulated from the first connection portions, and

wherein the first and second directions are inclined with respect to the length and width of the insulation substrate.

12. The display device of claim 11, wherein the second connection portions are grouped into pairs and wherein each of the pairs of second connection portions electrically connects two of the second sensing electrodes that are adjacent to each other.

13. The display device of claim 12, wherein the first and second sensing electrode patterns are formed of a conductive nanowire or a transparent conductive material.

14. The display device of claim 13, wherein each of the second connection portions is formed of metal.

15. The display device of claim 12, wherein each of the first connection portions extends in the first direction and wherein each of the second connection portions extends in the second direction.

16. The display device of claim 12, wherein the width of each of the first connection portions is greater than the sum of the widths of each of the pairs of second connection portions.

17. The display device of claim 11, further comprising an interlayer insulating layer electrically insulating the second connection portions from the first connection portions.

18. The display device of claim 17, wherein the interlayer insulating layer covers each of the first connection portions and partially covers the second sensing electrodes.

19. The display device of claim 17, wherein the interlayer insulating layer covers the first and second sensing electrode patterns and has a plurality of contact holes formed above the second sensing electrodes.