Touch Display Panel and Touch Display Device

• US 20190310731A1
• Filed: 03/26/2019
• Published: 10/10/2019
• Est. Priority Date: 04/04/2018
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: RHE, Ruda, JUNG, JiHyun, LEE, DeukSu, AN, SuChang, LEE, JaeGyun, GWON, Hyangmyoung, LEE, Yangsik
• Granted Patent: US 10,802,634 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures

Abstract

The present disclosure relates to a touch display device and a touch sensing method and, more specifically, to a touch display device and a touch sensing method that provide a single-layered touch sensor structure by a touch electrode connecting line that electrically connects touch electrodes arranged in one direction and is arranged to bypass and surround touch electrodes arranged in another direction, thereby enabling a simple manufacturing process, a high manufacturing yield, and a low manufacturing cost.

Claims

1. A touch display device comprising:

a display panel having a plurality of subpixels arranged therein and having a plurality of touch electrodes arranged therein; and

a touch sensing circuit configured to drive the plurality of touch electrodes,

wherein the plurality of touch electrodes constitute m X-touch electrode lines and n Y-touch electrode lines arranged to intersect each other,

wherein respective m X-touch electrode lines comprise a plurality of X-touch electrodes, and the plurality of X-touch electrodes are electrically connected to each other by X-touch electrode connecting lines arranged between adjacent X-touch electrodes,

wherein respective n Y-touch electrode lines comprise a plurality of Y-touch electrodes, and the plurality of Y-touch electrodes are electrically connected to each other by Y-touch electrode connecting lines arranged to surround at least a part of the X-touch electrode line, and

wherein an area of the Y-touch electrode included in a first Y-touch electrode line is different from an area of the Y-touch electrode included in a second Y-touch electrode line.

2. The touch display device of claim 1, wherein a Y-touch electrode connecting line configured to electrically connecting two adjacent Y-touch electrodes in the first Y-touch electrode line is longer than a Y-touch electrode connecting line configured to electrically connecting two adjacent Y-touch electrodes in the second Y-touch electrode line, and

wherein the area of the Y-touch electrode included in the first Y-touch electrode line is smaller than the area of the Y-touch electrode included in the second Y-touch electrode line.

3. The touch display device of claim 2, wherein the area of a Y-touch electrode included in a third Y-touch electrode line is larger than the area of the Y-touch electrode included in the second Y-touch electrode line, and

wherein the area of the X-touch electrode arranged between the first Y-touch electrode line and the second Y-touch electrode line, among the plurality of X-touch electrodes included in the X-touch electrode lines, is smaller than the area of the X-touch electrode arranged between the second Y-touch electrode line and the third Y-touch electrode line.

4. The touch display device of claim 1, wherein an area of one of the plurality of X-touch electrodes included in the X-touch electrode line is different from areas of remaining X-touch electrodes.

5. The touch display device of claim 1, wherein a ratio of dummy patterns included in one of the plurality of X-touch electrodes included in the X-touch electrode line is different from ratios of dummy patterns included in remaining X-touch electrodes.

6. The touch display device of claim 1, wherein a ratio of dummy patterns included in the Y-touch electrode included in the first Y-touch electrode line is different from a ratio of dummy patterns included in the Y-touch electrode included in the second Y-touch electrode line.

7. The touch display device of claim 1, wherein the Y-touch electrode connecting lines configured to electrically connect the plurality of Y-touch electrodes included in the Y-touch electrode line make a detour in a same direction.

8. The touch display device of claim 1, further comprising one or more additional patterns arranged in an area between the X-touch electrodes and the Y-touch electrodes and arranged along a shape of at least one of the X-touch electrodes, the Y-touch electrodes, the X-touch electrode connecting lines, and the Y-touch electrode connecting lines.

9. The touch display device of claim 8, wherein the one or more additional patterns are in a voltage state corresponding to a signal applied to the X-touch electrode line or the Y-touch electrode line, in a voltage state in which a ground voltage or a specific voltage is applied, or in a floating voltage state.

10. The touch display device of claim 8, wherein the one or more additional patterns are electrically connected to the X-touch electrode connecting lines or the Y-touch electrode connecting lines.

11. The touch display device of claim 1, wherein the touch sensing circuit outputs, to one of the m X-touch electrode lines, a signal having a frequency different from frequencies of signals output to remaining X-touch electrode lines, or

wherein the touch sensing circuit outputs, to one of the n Y-touch electrode lines, a signal having a frequency different from frequencies of signals output to remaining Y-touch electrode lines.

12. The touch display device of claim 1, wherein the display panel comprises a first area and a second area, and

wherein the X-touch electrode line arranged in the first area and the X-touch electrode line arranged in the second area are insulated from each other, and the Y-touch electrode line arranged in the first area and the Y-touch electrode line arranged in the second area are insulated from each other.

13. The touch display device of claim 1, wherein the display panel further comprises an encapsulation portion arranged on a light-emitting device included in each of the plurality of subpixels, and

wherein the X-touch electrode lines and the Y-touch electrode lines are arranged in a same layer on the encapsulation portion.

14. A touch display panel comprising:

a plurality of X-touch electrodes;

a plurality of Y-touch electrodes;

a plurality of X-touch electrode connecting lines configured to electrically connect two or more X-touch electrodes arranged in a same X-line, among the plurality of X-touch electrodes; and

a plurality of Y-touch electrode connecting lines configured to electrically connect two or more Y-touch electrodes arranged in the a Y-line, among the plurality of Y-touch electrodes,

wherein the X-touch electrode connecting line is arranged between two adjacent X-touch electrodes,

wherein the Y-touch electrode connecting line is arranged to surround at least a part of the adjacent X-touch electrodes and X-touch electrode connecting line, and

wherein the plurality of X-touch electrodes and the plurality of Y-touch electrodes have at least one of a structure in which two or more X-touch electrodes arranged in the same X-line have different areas, respectively, and a structure in which two or more Y-touch electrodes arranged in the same X-line have different areas, respectively.

15. The touch display panel of claim 14, wherein as a length of the Y-touch electrode connecting line connected to the Y-touch electrode increases, an area of the Y-touch electrode is reduced.

16. The touch display panel of claim 14, wherein as a number of Y-touch electrode connecting lines adjacent to the X-touch electrode is reduced, an area of the X-touch electrode is reduced.

17. A touch display device comprising:

a display panel having a plurality of subpixels arranged therein and having a plurality of touch electrodes arranged therein; and

a touch sensing circuit configured to drive the plurality of touch electrodes,

wherein the plurality of touch electrodes constitute m X-touch electrode lines and n Y-touch electrode lines arranged to intersect each other,

wherein respective m X-touch electrode lines comprise a plurality of X-touch electrodes, and the plurality of X-touch electrodes are electrically connected to each other by X-touch electrode connecting lines arranged between adjacent X-touch electrodes,

wherein respective n Y-touch electrode lines comprise a plurality of Y-touch electrodes, and the plurality of Y-touch electrodes are electrically connected to each other by Y-touch electrode connecting lines arranged to surround at least a part of the X-touch electrode line, and

wherein an area of one of the plurality of X-touch electrodes included the X-touch electrode line is different from areas of remaining X-touch electrodes.

18. The touch display device of claim 17, wherein as a number of Y-touch electrode connecting lines arranged adjacent to the X-touch electrode is reduced, an area of each of plurality of the X-touch electrodes included in the X-touch electrode line is reduced.