Display device

Patent metadata

Field	Value
Publication number	US-11093065-B2
Application number	US-202016907048-A
Country	US
Kind code	B2
Filing date	Jun 19, 2020
Priority date	Dec 20, 2019
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

A display device, includes: a substrate including an active area and a non-active area around the active area and including a pad area in which a plurality of touch pads are arranged; a plurality of sensing electrodes in the active area of the substrate; a plurality of sensing signal lines connected to each of the sensing electrodes; a multiplexer connected to the plurality of sensing signal lines; a pad multiplexer connection line connecting the multiplexer and the touch pad; and a transverse electric field blocking pattern between the pad multiplexer connection line and the substrate, wherein the transverse electric field blocking pattern covers the pad multiplexer connection line.

First claim

What is claimed is:

1. A display device, comprising:
a substrate including an active area and a non-active area around the active area and including a pad area in which a plurality of touch pads are arranged;
a plurality of sensing electrodes in the active area of the substrate;
a plurality of sensing signal lines connected to each of the sensing electrodes;
a multiplexer connected to the plurality of sensing signal lines;
a pad multiplexer connection line connecting the multiplexer and the touch pad; and
a transverse electric field blocking pattern between the pad multiplexer connection line and the substrate,
wherein the transverse electric field blocking pattern covers the pad multiplexer connection line.

2. The display device of claim 1 ,
wherein each of the sensing signal lines is connected to each of the sensing electrodes in one to one correspondence.

3. The display device of claim 2 , further comprising:
a driving circuit adjacent to the pad multiplexer connection line,
wherein the transverse electric field blocking pattern is configured to block a transverse electric field between the driving circuit and the pad multiplexer connection line.

4. The display device of claim 3 , further comprising:
a cathode electrode between the pad multiplexer connection line and the sensing electrode,
wherein the cathode electrode covers the pad multiplexer connection line and the driving circuit.

5. The display device of claim 4 ,
wherein the driving circuit includes a light emission control driving circuit or a scan driving circuit.

6. The display device of claim 4 ,
wherein the driving circuit includes a thin film transistor, and
the pad multiplexer connection line extends in parallel with input signal lines connected to a gate electrode of the thin film transistor of the driving circuit.

7. The display device of claim 6 , further comprising:
a ground line between the pad multiplexer connection line and the input signal line.

8. The display device of claim 7 ,
wherein the transverse electric field blocking pattern is electrically connected to the ground line.

9. The display device of claim 4 ,
wherein the multiplexer includes a thin film transistor, and
the thin film transistor of the multiplexer includes a drain electrode connected to the sensing signal line, a source electrode connected to the pad multiplexer connection line, and a gate electrode under the drain electrode and the source electrode.

10. The display device of claim 9 ,
wherein the sensing signal line is electrically connected to a source connection electrode under the sensing signal line, and
the source connection electrode is electrically connected to the drain electrode.

11. The display device of claim 10 ,
wherein the source connection electrode is electrically connected to a gate connection electrode under the source connection electrode, and
the gate connection electrode is electrically connected to the drain electrode.

12. The display device of claim 9 ,
wherein the gate electrode is electrically connected to a selection signal line of the multiplexer.

13. The display device of claim 9 , further comprising:
a driving substrate attached onto the pad area,
wherein the driving substrate is configured to apply an input signal to the sensing electrode and apply an output signal outputted from the sensing electrode.

14. The display device of claim 13 , further comprising:
a transverse electric field blocking pattern pad electrically connected to the transverse electric field blocking pattern in the pad area,
wherein a voltage is applied to the transverse electric field blocking pattern through the transverse electric field blocking pattern pad.

15. The display device of claim 14 ,
wherein the voltage applied to the transverse electric field blocking pattern is equal to a voltage of the input signal and/or a voltage of the output signal.

16. The display device of claim 4 ,
wherein the cathode electrode overlaps the transverse electric field blocking pattern and is electrically connected to the transverse electric field blocking pattern.

17. A display device, comprising:
a substrate including an active area and a non-active area around the active area and including a pad area in which a plurality of touch pads are arranged;
a plurality of light emitting elements arranged in the active area of the substrate;
an encapsulation layer on the plurality of light emitting elements and over the active area and the non-active area;
a touch sensor on the encapsulation layer, in which the touch sensor includes a plurality of sensing electrodes arranged on the active area of the encapsulation layer and a plurality of sensing signal lines connected to each of the sensing electrodes;
a plurality of sensing signal lines connected to each of the sensing electrodes;
a multiplexer connected to the plurality of sensing signal lines;
a pad multiplexer connection line connecting the multiplexer and the touch pad; and
a transverse electric field blocking pattern between the pad multiplexer connection line and the substrate,
wherein the transverse electric field blocking pattern covers the pad multiplexer connection line.

18. The display device of claim 17 ,
wherein each of the sensing signal lines is connected to each of the sensing electrodes in one to one correspondence.

19. The display device of claim 18 , further comprising:
a driving circuit adjacent to the pad multiplexer connection line,
wherein the transverse electric field blocking pattern is configured to block a transverse electric field between the driving circuit and the pad multiplexer connection line.

20. The display device of claim 19 , further comprising:
a cathode electrode between the pad multiplexer connection line and the sensing electrode,
wherein the cathode electrode covers the pad multiplexer connection line and the driving circuit, and
the driving circuit includes a light emission control driving circuit or a scan driving circuit.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Mi Young
• Jun Sang Hyun
• Kim Kwang Hyeok
• Park So Yeon
• Park Yong Hwan

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K59/87

  Passivation; Containers; Encapsulations · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0443 Primary

  using a single layer of sensing electrodes · 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