Display module

Patent metadata

Field	Value
Publication number	US-10635211-B2
Application number	US-201815947864-A
Country	US
Kind code	B2
Filing date	Apr 9, 2018
Priority date	Apr 24, 2017
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

A display device includes an input sensing unit. The input sensing unit includes sensors and signal lines connecting the sensors to a driving circuit for sensing a touch. The signal lines may include reception signal lines and transmission signal lines. A resistance value of the reception signal line connected to the sensor relatively far from the driving circuit is smaller than a resistance value of the reception signal line connected to the sensor relatively close to the driving circuit.

First claim

What is claimed is:

1. A display module comprising:
a display panel comprising a pad area disposed on one side of the display panel, wherein a printed circuit board is connected to the pad area; and
an input sensing unit disposed on the display panel, wherein a sensor area and a wiring area adjacent to the sensor area are defined on the input sensing unit,
wherein the sensor area comprises:
a plurality of reception sensors extending in a first direction and arranged in a second direction intersecting the first direction; and
a plurality of transmission sensors intersecting and capacitively coupled to the plurality of reception sensors,
wherein the wiring area comprises:
a plurality of reception signal lines connected to the plurality of reception sensors, respectively; and
a plurality of transmission signal lines connected to the plurality of transmission sensors, respectively,
wherein a resistance value of one of the plurality of reception signal lines connected to one of the plurality of reception sensors at a location spaced apart from the printed circuit board by a first distance in the second direction is smaller than a resistance value of one of the plurality of reception signal lines connected to one of the plurality of reception sensors at a location spaced apart from the printed circuit board by a second distance in the second direction that is smaller than the first distance, and
wherein a resistance value of one of the plurality of transmission signal lines having a minimum resistance ranges from 80% to 99% of a resistance value of another one of the plurality of transmission signal lines having a maximum resistance.

2. The display module of claim 1 , wherein the plurality of transmission signal lines comprise first transmission signal lines and second transmission signal lines, and
wherein the first transmission signal lines and the second transmission signal lines are symmetrical with respect to an imaginary straight line parallel to the second direction.

3. The display module of claim 2 , wherein a driving circuit for driving the display panel is mounted on the printed circuit board.

4. The display module of claim 3 , wherein the first transmission signal lines and the second transmission signal lines are symmetrical with respect to the driving circuit.

5. The display module of claim 1 , wherein at least one of the plurality of reception signal lines comprises a resistance value-increasing portion, and
wherein the resistance value-increasing portion has a meandering shape.

6. The display module of claim 5 , wherein the resistance value-increasing portion is disposed between the sensor area and the pad area.

7. The display module of claim 1 , wherein the plurality of reception sensors comprise first reception sensors and second reception sensors, and
wherein an extending direction in which corresponding reception signal lines of the plurality of reception signal lines extend from the first reception sensors is different from an extending direction in which corresponding reception signal lines of the plurality of reception signal lines extend from the second reception sensors.

8. The display module of claim 7 , wherein distances that the first reception sensors are spaced from the printed circuit board are greater than distances that the second reception sensors are spaced from the printed circuit board.

9. The display module of claim 7 , wherein the first reception sensors and the second reception sensors are alternately arranged.

10. The display module of claim 1 , wherein the display panel comprises:
an element layer comprises an organic light-emitting element; and
a thin film encapsulation layer encapsulating the element layer.

11. The display module of claim 10 , wherein the plurality of reception sensors and the plurality of transmission sensors are disposed directly on the thin film encapsulation layer.

12. The display module of claim 1 , wherein at least one of the plurality of reception signal lines has a thickness gradually increase while extending in the second direction.

13. The display module of claim 1 , wherein the plurality of reception signal lines have thicknesses different from each other.

14. A display module comprising:
a display panel comprising a pad area, a printed circuit board is connected to the pad area; and
an input sensing unit disposed on the display panel, wherein a sensor area and a wiring area adjacent to the sensor area are defined on the input sensing unit,
wherein the sensor area comprises:
first to n th reception sensors extending in a first direction and sequentially arranged toward the pad area in a second direction intersecting the first direction, wherein n is an integer greater than 1 such that the first reception sensor is furthest from the pad area in the second direction and the n th reception sensor is closest to the pad area in the second direction; and
a plurality of transmission sensors capacitively coupled to the first to n th reception sensors,
wherein the wiring area comprises:
first to n th reception signal lines connected to the first to n th reception sensors, respectively; and
a plurality of transmission signal lines connected to the plurality of transmission sensors, respectively,
wherein a resistance value of a k th reception signal line of the first to n th reception signal lines is smaller than a resistance value of a k+1 th reception signal line of the first to n th reception signal lines, wherein k is an integer greater than 0, and
wherein a resistance value of one of the plurality of transmission signal lines having a minimum resistance ranges from 80% to 99% of a resistance value of another one of the plurality of transmission signal lines having a maximum resistance.

15. The display module of claim 14 , wherein the plurality of transmission signal lines comprises first transmission signal lines and second transmission signal lines, and
wherein the first transmission signal lines and the second transmission signal lines are symmetrical with respect to an imaginary straight line parallel to the second direction.

16. The display module of claim 14 , wherein at least one of the plurality of reception signal lines comprises a resistance value-increasing portion, and
wherein the resistance value-increasing portion has a meandering shape.

17. The display module of claim 14 , wherein at least one of the plurality of reception signal lines has a thickness gradually increase while extending in the second direction.

18. The display module of claim 14 , wherein the first to n th reception signal lines have thicknesses different from each other.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Kwan-Ho
• Bang Gyeongnam
• Lee Sangwon
• Na Hyunjae
• Son Hoseok
• Cho Sungyeon
• Ku Jaseung
• Jung Taehyeog

Classifications

• G06F3/047

  using sets of wires, e.g. crossed wires · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/044

  by capacitive means · CPC title

• H10K59/131

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

• H10K59/40 Primary

  OLEDs integrated with touch screens · CPC title