Touch display device

Patent metadata

Field	Value
Publication number	US-11983361-B2
Application number	US-202217884287-A
Country	US
Kind code	B2
Filing date	Aug 9, 2022
Priority date	Oct 18, 2021
Publication date	May 14, 2024
Grant date	May 14, 2024

Abstract

Embodiments of the present disclosure are related to a touch display device, in a structure that a touch electrode line is disposed to be divided on a plurality of sub-areas included in an active area, by synchronizing a driving of the touch electrode line adjacent to a boundary of the sub-area, or by performing a differential sensing processing by sharing a touch sensing signal detected from the touch electrode line, thus an accuracy of a touch sensing for an area adjacent to the boundary of the sub-area can be improved.

First claim

What is claimed is:

1. A touch display device, comprising:
a plurality of light-emitting elements on an active area of a display panel;
an encapsulation layer on the plurality of light-emitting elements;
a plurality of X-touch electrode lines on the encapsulation layer, the plurality of X-touch electrode lines comprising two or more X-touch electrodes electrically connected to each other along a first direction, and disposed on each of a plurality of sub-areas included in the active area separately;
a plurality of Y-touch electrode lines on the encapsulation layer, the plurality of Y-touch electrode lines comprising two or more Y-touch electrodes electrically connected to each other along a second direction that crosses the first direction, and disposed on each of the plurality of sub-areas separately; and
a plurality of touch routing lines electrically connected to the plurality of X-touch electrode lines and the plurality of Y-touch electrode lines,
wherein the plurality of sub-areas comprise a first sub-area and a second sub-area which are divided by a boundary along the first direction, and
wherein a driving period of a first X-touch electrode line from a plurality of first X-touch electrode lines disposed on the first sub-area which is closest to the boundary along the first direction is synchronized with a driving period of a second X-touch electrode line from a plurality of second X-touch electrode lines disposed on the second sub-area which is closest to the boundary of the first direction such that at least a portion of the driving period of the first X-touch electrode line overlaps at least a portion of the driving period of the second X-touch electrode line,
wherein each of the plurality of first X-touch electrode lines is driven sequentially along one direction, and each of the plurality of second X-touch electrode lines is driven sequentially along an opposite direction of the one direction while a corresponding one of the plurality of first X-touch electrode lines is driven.

2. The touch display device of claim 1 , wherein the plurality of Y-touch electrode lines disposed on each of the plurality of sub-areas are driven simultaneously for each of the plurality of sub-areas.

3. The touch display device of claim 1 , wherein the plurality of sub-areas comprise a third sub-area separated from the first sub-area by a boundary along the second direction, and
wherein each of a plurality of third X-touch electrode lines disposed on the third sub-area corresponds to each of the plurality of first X-touch electrode lines, and a driving period of each of the plurality of third X-touch electrode lines is synchronized with a driving period of the corresponding first X-touch electrode line.

4. The touch display device of claim 3 , wherein the plurality of sub-areas comprise a fourth sub-area separated from the third sub-area by the boundary along the first direction, and
wherein a driving period of a fourth X-touch electrode line which is closest to the boundary of the first direction among a plurality of fourth X-touch electrode lines disposed on the fourth sub-area is synchronized with a driving period of a third X-touch electrode line which is closest to the boundary along the first direction among the plurality of third X-touch electrode lines.

5. The touch display device of claim 4 , wherein the driving period of the first X-touch electrode line which is closest to the boundary along the first direction, the driving period of the second X-touch electrode line which is closest to the boundary along the first direction, the driving period of the third X-touch electrode line which is closest to the boundary along the first direction and the driving period of the fourth X-touch electrode line which is closest to the boundary along the first direction are synchronized with one another.

6. The touch display device of claim 4 , wherein each of the plurality of Y-touch electrode lines is electrically connected to each of a plurality of sensing units through the plurality of touch routing lines, and
wherein a structure of a sensing unit electrically connected to a Y-touch electrode line which is closest to the boundary of the second direction is different from a structure of a sensing unit electrically connected to remaining Y-touch electrode line.

7. The touch display device of claim 6 , wherein the sensing unit electrically connected to the Y-touch electrode line which is closest to the boundary along the second direction is electrically connected to one Y-touch electrode line, and each of the sensing units electrically connected to the remaining Y-touch electrode lines is electrically connected to two or more Y-touch electrode lines.

8. The touch display device of claim 6 , wherein a touch driving circuit electrically connected to a plurality of first Y-touch electrode lines disposed on the first sub-area is different from a touch driving circuit electrically connected to a plurality of third Y-touch electrode lines disposed on the third sub-area, and
wherein a touch driving circuit electrically connected to a plurality of second Y-touch electrode lines disposed on the second sub-area is different from a touch driving circuit electrically connected to a plurality of fourth Y-touch electrode lines disposed on the fourth sub-area.

9. The touch display device of claim 1 , further comprising:
a memory configured to store sensing data based on a touch sensing signal acquired from the plurality of Y-touch electrode lines disposed on the plurality of sub-areas.

10. The touch display device of claim 1 , wherein at least some of the plurality of X-touch electrode lines disposed on the first sub-area and the second sub-area are electrically connected to touch pads disposed on a first pad area positioned outside of the active area, and
wherein at least some of the plurality of Y-touch electrode lines disposed on the first sub-area and the second sub-area are electrically connected to touch pads disposed on a second pad area positioned outside of the active area.

11. The touch display device of claim 10 , wherein at least some of lines electrically connecting between the touch pads disposed on the first pad area and a touch driving circuit are crossing at least some of lines electrically connecting between the touch pads disposed on the second pad area and a touch driving circuit outside of the display panel.

12. A touch display device, comprising:
a plurality of X-touch electrode lines comprising two or more X-touch electrodes electrically connected to each other along a first direction, the plurality of X-touch electrode lines disposed on each of a plurality of sub-areas included in an active area separately; and
a plurality of Y-touch electrode lines comprising two or more Y-touch electrodes electrically connected to each other along a second direction that crosses the first direction, the plurality of Y-touch electrode lines disposed on each of the plurality of sub-areas separately,
wherein the plurality of sub-areas comprise a first sub-area and a second sub-area which are divided by a boundary along the first direction, and
wherein an interval between a period in which a touch driving signal is supplied to a first X-touch electrode line from a plurality of first X-touch electrode lines disposed on the first sub-area which is closest to the boundary of the first direction and a period in which a touch driving signal is supplied to a second X-touch electrode line from a plurality of second X-touch electrode lines disposed on the second sub-area which is closest to the boundary along the first direction is less than an interval between the period in which the touch driving sign

Assignees

• Lg Display Co Ltd

Inventors

• Shin Seungrok
• Lee Jeonghoon
• Lee Deuksu
• Jang Yoonnara

Classifications

• G06F3/04166 Primary

  Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184) · CPC title

• G06F3/04184

  Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F3/04164

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · CPC title