Input sensing circuit and display device including the same

Patent metadata

Field	Value
Publication number	US-11387293-B2
Application number	US-202016841938-A
Country	US
Kind code	B2
Filing date	Apr 7, 2020
Priority date	Apr 29, 2019
Publication date	Jul 12, 2022
Grant date	Jul 12, 2022

Abstract

A display device includes a display panel and an input sensing circuit. The input sensing circuit includes a plurality of sensors and signal lines electrically connected to each of the plurality of sensors. Each of the plurality of signal lines includes a lower line and an upper line overlapping the lower line, and the lower line and the upper line are electrically connected in a plurality of contact areas. A long signal line among the plurality of signal lines has more contact areas than a short signal line.

First claim

What is claimed is:

1. An input sensing circuit comprising:
a plurality of first sensor groups extending in a first direction and comprising a plurality of first sensors;
a plurality of second sensor groups extending in a second direction and comprising a plurality of second sensors, the second direction crossing the first direction;
a first line and a second line respectively electrically connected to different first sensor groups among the plurality of first sensor groups; and
a third line and a fourth line respectively electrically connected to different second sensor groups among the plurality of second sensor groups,
wherein
the first line comprises:
a first lower line having a first length; and
a first upper line having a second length longer than the first length, the first upper line being electrically connected to the first lower line in a plurality of first contact areas,

wherein the second line comprises:
a second lower line having a third length shorter than the first length; and
a second upper line having a fourth length longer than the third length and shorter than the second length, the second upper line being electrically connected to the second lower line in a plurality of second contact areas, and

a difference between the first length and the second length is different from a difference between the third length and the fourth length, and
wherein the difference between the first length and the second length is less than the difference between the third length and the fourth length.

2. The input sensing circuit of claim 1 , wherein each of the plurality of first sensor groups further comprises a plurality of first connection patterns that electrically connect two adjacent first sensors among the plurality of first sensors and are on the same layer as the plurality of first sensors, and
each of the plurality of second sensor groups further comprises a plurality of second connection patterns that electrically connect two adjacent second sensors among the plurality of second sensors and are on a different layer than the plurality of second sensors.

3. The input sensing circuit of claim 2 , wherein the plurality of first sensors and the plurality of second sensors are on the same layer.

4. The input sensing circuit of claim 3 , wherein the first upper line and the second upper line are each on the same layer as the plurality of first sensors, and
the first lower line and the second lower line are each on the same layer as the plurality of second connection patterns.

5. The input sensing circuit of claim 4 , wherein at least a portion of the second lower line is between the first lower line and the plurality of second connection patterns, and
at least a portion of the second upper line is between the first upper line and the plurality of first sensors.

6. The input sensing circuit of claim 1 , wherein the first line is electrically connected to an odd-numbered first sensor group among the plurality of first sensor groups, and
the second line is electrically connected to an even-numbered first sensor group among the plurality of first sensor groups.

7. The input sensing circuit of claim 1 , wherein a plurality of opening parts are defined in each of the plurality of first sensors and the plurality of second sensors.

8. The input sensing circuit of claim 1 , wherein each of the plurality of first sensors and the plurality of second sensors has a mesh shape.

9. The input sensing circuit of claim 1 , wherein the first lower line and the second lower line do not contact the plurality of first sensor groups and the plurality of second sensor groups.

10. A display device comprising:
a display panel comprising a light emitting element layer that comprises a plurality of light emitting elements, and a sealing layer that seals the plurality of light emitting elements; and
an input sensing circuit on the display panel,
wherein
the input sensing circuit comprises:
a plurality of first sensor groups extending in a first direction and comprising a plurality of first sensors;
a plurality of second sensor groups extending in a second direction and comprising a plurality of second sensors, the second direction crossing the first direction;
a first line and a second line electrically connected to different first sensor groups, respectively, among the plurality of first sensor groups; and
a third line and a fourth line electrically connected to different second sensor groups, respectively, among the plurality of second sensor groups,

wherein
the first line comprises:
a first lower line having a first length; and
a first upper line having a second length longer than the first length, the first upper line being electrically connected to the first lower line in a plurality of first contact areas,

wherein
the second line comprises:
a second lower line having a third length shorter than the first length; and
a second upper line having a fourth length longer than the third length and shorter than the second length, the second upper line being electrically connected to the second lower line in a plurality of second contact areas,

wherein a length of a first single-layer area of the first line including only the first upper line is different from a length of a second single-layer area of the second line including only the second upper line, and
wherein a difference between the first length and the second length is less than a difference between the third length and the fourth length.

11. The display device of claim 10 , wherein each of the plurality of first sensor groups further comprises a plurality of first connection patterns that electrically connect two adjacent first sensors among the plurality of first sensors and are on the same layer as the plurality of first sensors, and
each of the plurality of second sensor groups further comprises a plurality of second connection patterns that electrically connect two adjacent second sensors among the plurality of second sensors and are on a different layer than the plurality of second sensors.

12. The display device of claim 11 , wherein the plurality of first sensors and the plurality of second sensors are on the same layer.

13. The display device of claim 12 , wherein the first upper line and the second upper line are each on the same layer as the plurality of first sensors, and
the first lower line and the second lower line are each on the same layer as the plurality of second connection patterns.

14. The display device of claim 13 , wherein at least a portion of the second lower line is between the first lower line and the plurality of second connection patterns, and
at least a portion of the second upper line is between the first upper line and the plurality of first sensors.

15. The display device of claim 10 , wherein a plurality of opening parts overlapping the plurality of light emitting elements are defined in each of the plurality of first sensors and the plurality of second sensors.

16. The display device of claim 10 , wherein the first lower line and the second lower line do not contact the plurality of first sensor groups and the plurality of second sensor groups.

17. An input sensing circuit comprising:
a base layer comprising a sensor area and a wiring area around the sensor area;
a plurality of connection patterns on the sensor area;
a plurality of lower lines on the wiring area and comprising a first lower line having a first length and a second lower line having a second length shorter than the first length;
an insulation layer on the base layer, to cover the p

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Sunhwa
• Jeon Mukyung
• Cho Jaehyung
• Pyo Kihyun

Classifications

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G06F1/1643

  the display being associated to a digitizer, e.g. laptops that can be used as penpads (details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615) · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title

• G06F3/04164

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