Display device

Patent metadata

Field	Value
Publication number	US-2025123720-A1
Application number	US-202418989148-A
Country	US
Kind code	A1
Filing date	Dec 20, 2024
Priority date	Jun 30, 2022
Publication date	Apr 17, 2025
Grant date	—

Abstract

A display device includes a display panel divided into a display area and a non-display area, and an input sensing unit disposed on the display panel and divided into an active area and a non-active area. The input sensing unit includes a plurality of sensing electrodes overlapping the active area and including a plurality of first sensing electrodes extending in a first direction, and a plurality of second sensing electrodes extending in a second direction crossing the first direction, a plurality of first trace lines respectively connected to the plurality of first sensing electrodes and including an inside portion overlapping the active area, and a dummy electrode unit overlapping the inside portion in the first direction. The dummy electrode unit is adjacent to the plurality of sensing electrodes in the second direction and does not overlap the plurality of sensing electrodes in the first direction.

First claim

What is claimed is:

1 . A display device comprising:
a display panel divided into a display area and a non-display area; and an input sensing unit disposed on the display panel and divided into an active area overlapping the display area and a non-active area overlapping the non-display area, wherein the input sensing unit comprises: a plurality of sensing electrodes overlapping the active area and comprising a plurality of first sensing electrodes extending in a first direction, and a plurality of second sensing electrodes extending in a second direction crossing the first direction; and a dummy electrode unit, wherein the dummy electrode unit is disposed in a line overlap area of the active area, the line overlap area is disposed at a boundary of the active area and the non-active area, and the dummy electrode unit does not extend outside of the line overlap area.

2 . The display device of claim 1 , wherein the active area has a short side extending in the first direction and a long side extending in the second direction, and an inside portion overlaps a corner part at which the short side is connected to the long side.

3 . The display device of claim 1 , wherein the input sensing unit further comprises:
a plurality of first trace lines respectively connected to the plurality of first sensing electrodes and comprising an inside portion overlapping the active area, and wherein the plurality of first trace lines comprises: a first side trace line connected to a first side of the plurality of first sensing electrodes; and a second side trace line connected to a second side spaced apart from the first side along the first direction.

4 . The display device of claim 3 , wherein the first side trace line comprises a first inside portion overlapping the active area,
the second side trace line comprises a second side portion overlapping the active area and spaced apart from the first inside portion in the first direction, and the dummy electrode unit is disposed between the first inside portion and the second inside portion.

5 . The display device of claim 1 , wherein the input sensing unit further comprises:
a plurality of first trace lines respectively connected to the plurality of first sensing electrodes and comprising an inside portion overlapping the active area, and a plurality of second trace lines respectively connected to the plurality of second sensing electrodes, and at least partially overlapping the active area, wherein the dummy electrode unit overlaps a portion of the plurality of second trace lines in the first direction.

6 . The display device of claim 5 , wherein the portion of the plurality of second trace lines, which overlap the dummy electrode unit in the first direction, are disposed in the line overlap area,
some of the plurality of first trace lines and some of the plurality of second trace lines are disposed in the line overlap area, and a number of the plurality of second trace lines partially disposed in the line overlap area is smaller than about 30% of a number of the plurality of first trace lines partially disposed in the line overlap area.

7 . The display device of claim 5 , wherein the plurality of second sensing electrodes comprise a plurality of unit sensing electrodes arranged along the first direction to which the plurality of second trace lines are connected, and
respective widths of the plurality of unit sensing electrodes in the second direction are substantially identical.

8 . The display device of claim 7 , wherein a cutting part is defined between the dummy electrode unit and the plurality of unit sensing electrodes.

9 . The display device of claim 7 , wherein the plurality of second sensing electrodes further comprise a plurality of main sensing electrodes spaced apart from the plurality of unit sensing electrodes along the second direction, and
a width of each of the plurality of main sensing electrodes in the second direction is larger than the respective widths of each of the plurality of unit sensing electrodes in the second direction.

10 . The display device of claim 1 , wherein the plurality of sensing electrodes and the dummy electrode unit each comprise a plurality of mesh lines, and
each of the plurality of mesh lines comprises: a first mesh line extending in a first diagonal direction between the first direction and the second direction; and a second mesh line extending from the first mesh line in a second diagonal line crossing the first diagonal direction.

11 . The display device of claim 10 , wherein the first mesh line and the second mesh line cross each other.

12 . The display device of claim 1 , wherein the input sensing unit comprises:
a first sensing insulation layer directly disposed on the display panel; a first sensing conductive layer disposed on the first sensing insulation layer; a second sensing insulation layer disposed on the first sensing insulation layer and covering the first sensing conductive layer; a second sensing conductive layer disposed on the second sensing insulation layer; and a third sensing insulation layer disposed on the second sensing insulation layer and covering the second sensing conductive layer.

13 . The display device of claim 12 , wherein each of the plurality of first sensing electrodes is disposed on the second sensing insulation layer.

14 . The display device of claim 1 , wherein an inside portion comprises:
a first portion extending in the first direction; and a second portion extending in the second direction.

15 . The display device of claim 1 , wherein an inside portion comprises a plurality of mesh lines comprising:
a first mesh line extending in a first diagonal direction between the first direction and the second direction; and a second mesh line extending from the first mesh line in a second diagonal direction crossing the first diagonal direction.

16 . An electronic device, comprising:
a display device; and an electronic module electrically connected to the display device; and the display device comprises: a display panel divided into a display area and a non-display area; and an input sensing unit disposed on the display panel and divided into an active area overlapping the display area and a non-active area overlapping the non-display area, wherein the input sensing unit comprises: a plurality of first sensing electrodes overlapping the active area and extending in a first direction; a plurality of second sensing electrodes overlapping the active area and extending in a second direction crossing the first direction; and a dummy electrode unit spaced apart from the plurality of first sensing electrodes and the plurality of second sensing electrodes along the second direction, wherein the dummy electrode unit is disposed in a line overlap area of the active area, the line overlap area is disposed at a boundary of the active area and the non-active area, and the dummy electrode unit does not extend outside of the line overlap area.

17 . The electronic device of claim 16 , wherein the active area comprises:
a main area disposed with the plurality of first sensing electrodes and the plurality of second sensing electrodes; and a dummy area disposed with the dummy electrode unit, wherein the dummy area overlaps the line overlap area in the first direction, and overlaps the main area in the second direction.

18 . The electronic device of claim 16 , wherein the plurality of second sensing electrodes comprise a plurality of unit sensing electrodes arranged alo

Assignees

• Samsung Display Co Ltd

Inventors

• Park Yong-Hwan
• Ko Gyung-Min
• Kim Eunyoung
• Bang Gyeongnam
• Lee Seongjun
• Han Jeongyun

Classifications

• 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

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G06F3/0448

  Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality · CPC title

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title