IP Library › Granted Patent US 12675192

Granted Patent B2

US 12675192 · App. 18/899,524 · Granted Jul 7, 2026

Touch display device and display panel with pseudo-touch electrode and touch lines having different widths

Inventors: Jinyong Jang (Paju-si, KR); Sangug An (Paju-si, KR); Kyungsu Ha (Paju-si, KR)

Assignee: LG Display Co., Ltd.

G06F3/0418 G06F3/0412 G06F3/04164 G06F3/04166 G06F3/0446 H10K59/40

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Quick Facts

Patent No.: US 12675192
App. No.: 18/899,524
Granted: Jul 7, 2026
Kind: B2

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Abstract

Embodiments of the disclosure relate to a touch display device and a display panel and, more specifically, to a touch display device, comprising a display panel including a plurality of touch electrode lines disposed in a display area and at least one pseudo-touch electrode line disposed in a non-display area and a touch circuit supplying a touch driving signal through a plurality of touch lines respectively connected to the plurality of touch electrode lines and supplying a pseudo-touch driving signal having a phase opposite to that of the touch driving signal through a pseudo-touch line connected to the at least one pseudo-touch electrode line, wherein at least some of the plurality of touch lines are formed to have different line widths according to positions of the plurality of touch electrode lines.

Claims (60)

1 . A touch display device, comprising:

a display panel including a plurality of touch electrode lines extending in a first direction in a display area of the display panel and at least one pseudo-touch electrode line extending in the first direction in a first non-display area of the display panel; and

a touch circuit configured to supply a touch driving signal through a plurality of touch lines respectively connected to the plurality of touch electrode lines and supply a pseudo-touch driving signal having a phase that is opposite to that of a phase of the touch driving signal through a pseudo-touch line connected to the at least one pseudo-touch electrode line in a second non-display area opposite the first non-display area based on the display area, a first touch line of the plurality of touch lines connected to a first touch electrode line of the plurality of touch electrode lines, a second touch line of the plurality of touch lines connected to a second touch electrode line of the plurality of touch electrode lines,

wherein the first touch line includes a first portion of a first width extending in the first direction in the second non-display area, a second portion extending in a second direction intersecting the first direction, and a third portion extending in the first direction and connected to the first touch electrode line, the first portion of the first touch line closer to the touch circuit than the second portion of the first touch line and the third portion of the first touch line,

wherein the second touch line includes a first portion of a second width extending in the first direction in the second non-display area, a second portion extending in the second direction, and a third portion extending in the first direction and connected to the second touch electrode line, the first portion of the second touch line closer to the touch circuit than the second portion of the second touch line and the third portion of the second touch line,

wherein the first width of the first portion of the first touch line is greater than the second width of the first portion of the second touch line in the second non-display area, and

wherein the first touch electrode line is further from the touch circuit than the second touch electrode line in a plan view of the touch display device.

2 . The touch display device of claim 1 , wherein at least some of the plurality of touch lines have different line widths in the second non-display area of the display panel adjacent to the touch circuit.

3 . The touch display device of claim 1 , wherein at least some of the plurality of touch lines have a larger line width as touch electrode lines connected thereto are farther from the touch circuit that other touch lines of the plurality of touch lines.

4 . The touch display device of claim 1 , wherein at least some of the plurality of touch lines include:

a single touch line group including a single metal line; and

a dual touch line group including a dual metal line.

5 . The touch display device of claim 4 , wherein the single touch line group is connected to a first touch electrode line group, and

wherein the dual touch line group is connected to a second touch electrode line group that is farther from the touch circuit than the first touch electrode line group.

6 . The touch display device of claim 4 , wherein the dual metal line includes:

a first metal line;

a second metal line on a layer different from the first metal line;

an insulation film between the first metal line and the second metal line; and

a contact hole that connects the first metal line and the second metal line in a partial area.

7 . The touch display device of claim 1 , wherein the plurality of touch lines are connected to two opposite sides of the plurality of touch electrode lines to simultaneously apply the touch driving signal.

8 . The touch display device of claim 1 , wherein the plurality of touch lines include:

a first group touch line on one side of a touch sensing line receiving a touch sensing signal; and

a second group touch line on another side of the touch sensing line.

9 . The touch display device of claim 8 , wherein the first group touch line and the second group touch line have a larger line width as a touch electrode line connected thereto is farther from the touch circuit than another touch electrode line.

10 . The touch display device of claim 8 , wherein each of the first group touch line and the second group touch line includes:

a single touch line group having a single metal line; and

a dual touch line group having a dual metal line.

11 . The touch display device of claim 10 , wherein the single touch line group is connected to a first touch electrode line group, and the dual touch line group is connected to a second touch electrode line group that is farther from the touch circuit than the first touch electrode line group.

12 . The touch display device of claim 8 , wherein the first group touch line and the second group touch line are connected to each other and form a closed loop.

13 . The touch display device of claim 1 , wherein the first non-display area is an outer area of the display area, and the at least one pseudo-touch electrode line is in parallel with the plurality of touch electrode lines.

14 . The touch display device of claim 1 , wherein a number of the pseudo-touch line is less than a number of the plurality of touch lines, and a line width of the pseudo-touch line is thicker than a line width of plurality of touch lines.

15 . A touch display device, comprising:

a touch circuit configured to supply a touch driving signal through a plurality of touch lines respectively connected to the plurality of touch electrode lines and supply a pseudo-touch driving signal having a phase that is opposite to a phase of the touch driving signal through a pseudo-touch line connected to the at least one pseudo-touch electrode line in a second non-display area opposite the first non-display area based on the display area, a first touch line of the plurality of touch lines connected to a first touch electrode line of the plurality of touch electrode lines, a second touch line of the plurality of touch lines connected to a second touch electrode line of the plurality of touch electrode lines,

wherein the plurality of touch lines include a single touch line group having a single metal line and a dual touch line group having a dual metal line,

wherein the first width of the first portion of the first touch line is greater than the second width of the first portion of the second touch line in the second non-display area, and

wherein the first touch electrode line is further from the touch circuit than the second touch electrode line in a plan view of the touch display device.

16 . The touch display device of claim 15 , wherein the single touch line group is connected to a first touch electrode line group, and the dual touch line group is connected to a second touch electrode line group that is farther from the touch circuit than the first touch electrode line group.

17 . The touch display device of claim 15 , wherein the first non-display area is an outer area of the display area, and the at least one pseudo-touch electrode line is in parallel with the plurality of touch electrode lines.

18 . The touch display device of claim 15 , wherein a number of pseudo-touch lines is less than a number of the plurality of touch lines, and a line width of the pseudo-touch line is thicker than a line width of the plurality of touch lines.

19 . A display panel, comprising:

a plurality of touch electrode lines extending in a first direction in a display area of the display panel;

at least one pseudo-touch electrode line extending in the first direction in a first non-display area of the display panel;

a plurality of touch lines connected to the plurality of touch electrode lines, the plurality of touch lines transferring a touch driving signal from a touch circuit, a first touch line of the plurality of touch lines connected to a first touch electrode line of the plurality of touch electrode lines, a second touch line of the plurality of touch lines connected to a second touch electrode line of the plurality of touch electrode lines; and

at least one pseudo-touch line connected to the at least one pseudo-touch electrode line, the at least one pseudo-touch line transferring a pseudo-touch driving signal having a phase opposite to a phase of the touch driving signal,

wherein the first touch line includes a first portion of a first width extending in the first direction in a second non-display area, a second portion extending in a second direction intersecting the first direction, and a third portion extending in the first direction and connected to the first touch electrode line, the first portion of the first touch line closer to the touch circuit than the second portion of the first touch line and the third portion of the first touch line,

wherein the first width of the first portion of the first touch line is greater than the second width of the first portion of the second touch line in the second non-display area, and

wherein the first touch electrode line is further from the touch circuit than the second touch electrode line in a plan view of the display panel.

20 . The display panel of claim 19 , wherein at least some of the plurality of touch lines have different line widths in the second non-display area that is adjacent to a touch circuit, the touch circuit is connected to the plurality of touch lines and the at least one pseudo-touch line.

21 . The display panel of claim 19 , wherein at least some of the plurality of touch lines have a larger line width as touch electrode lines connected thereto are farther from a touch circuit than other touch lines from the plurality of touch lines, the touch circuit is connected to the plurality of touch lines and the at least one pseudo-touch line.

22 . The display panel of claim 19 , wherein at least some of the plurality of touch lines include:

a single touch line group having a single metal line; and

a dual touch line group having a dual metal line.

23 . The display panel of claim 22 , wherein the single touch line group is connected to a first touch electrode line group, and the dual touch line group is connected to a second touch electrode line group that is farther from a touch circuit than the first touch electrode line group,

wherein the touch circuit is connected to the plurality of touch lines and the at least one pseudo-touch line.

24 . The display panel of claim 19 , wherein the first non-display area is an outer area of the display area, and the at least one pseudo-touch electrode line is in parallel with the plurality of touch electrode lines.

25 . The display panel of claim 19 , wherein a number of pseudo-touch lines is less than a number of the plurality of touch lines, and a line width of the at least one pseudo-touch line is thicker than a line width of the plurality of touch lines.