US-12625588-B2 - Input sensor unit and display device including the same

Abstract

Disclosed is a display device which includes a display panel and an input sensor unit. The input sensor unit includes a base layer, a plurality of sensing electrodes, a plurality of lines, and a peripheral pen sensing electrode. The plurality of sensing electrodes include a first sensing electrode, a second sensing electrode, a pen sensing electrode 1-1, a pen sensing electrode 1-2, and a second pen sensing electrode. A first width of the peripheral pen sensing electrode in a first direction is greater than a second width of each of the plurality of lines in the first direction.

Inventors

• Miyoung Kim
• JIna KANG
• Kyowon KU
• Sanghyun Lim

Assignees

• SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date

20260512

Application Date

20230907

Priority Date

20221227

Claims (20)

1. 1 . A display device comprising: a display panel; and an input sensor unit disposed on the display panel, the input sensor unit having an active region and a peripheral region, the peripheral region being adjacent to the active region, wherein the input sensor unit includes: a base layer; a plurality of sensing electrodes disposed in the active region and disposed on the base layer; a plurality of conductive lines disposed in the peripheral region and disposed on the base layer, the plurality of conductive lines being electrically connected to the plurality of sensing electrodes; and a peripheral pen sensing electrode disposed in the peripheral region and spaced apart from the plurality of sensing electrodes, wherein the plurality of conductive lines are disposed between the peripheral pen sensing electrode and the active region in which the plurality of sensing electrodes are disposed, and wherein the peripheral pen sensing electrode extends lengthwise in a first direction, and wherein the plurality of sensing electrodes include: a first sensing electrode; a second sensing electrode insulated from the first sensing electrode and extending across the first sensing electrode; a pair of first pen sensing electrodes extending in the first direction and including a first pen sensing electrode insulated from the second sensing electrode and extending across the second sensing electrode, the first pen sensing electrode being adjacent to the first sensing electrode; and a second pen sensing electrode insulated from the first sensing electrode and the first pen sensing electrode and extending across the first sensing electrode and the first pen sensing electrode in a second direction different from the first direction, the second pen sensing electrode being adjacent to the second sensing electrode, wherein a first width of the peripheral pen sensing electrode along a majority of a length thereof in the first direction is greater in the second direction than a second width of each of the plurality of conductive lines in the second direction.
2. 2 . The display device of claim 1 , wherein the plurality of conductive lines include: a sensing line electrically connected to the second sensing electrode; and a pen sensing line electrically connected to the second pen sensing electrode.
3. 3 . The display device of claim 2 , wherein the pen sensing line and the peripheral pen sensing electrode are disposed in the same layer.
4. 4 . The display device of claim 2 , wherein the pen sensing line and the peripheral pen sensing electrode are disposed in a layer different from a layer in which the sensing line is disposed.
5. 5 . The display device of claim 4 , wherein the input sensor unit further includes an insulating layer, wherein the pen sensing line and the peripheral pen sensing electrode are disposed on the base layer, wherein the insulating layer covers the pen sensing line and the peripheral pen sensing electrode, and wherein the sensing line is disposed on the insulating layer.
6. 6 . The display device of claim 2 , wherein the input sensor unit further includes an insulating layer, wherein a first pen sensing line part of the pen sensing line and a first sensing part of the peripheral pen sensing electrode are disposed on the base layer, wherein the insulating layer covers the first pen sensing line part and the first sensing part, wherein the sensing line, a second pen sensing line part of the pen sensing line, and a second sensing part of the peripheral pen sensing electrode are disposed on the insulating layer, wherein the insulating layer has a first contact hole and a second contact hole defined therein, wherein the first pen sensing line part and the second pen sensing line part are electrically connected with each other through the first contact hole, and wherein the first sensing part and the second sensing part are electrically connected with each other through the second contact hole.
7. 7 . The display device of claim 6 , wherein the first sensing part has a greater width than the second sensing part in the second direction.
8. 8 . The display device of claim 7 , wherein the first sensing part overlaps the second sensing part and the sensing line when viewed in a plan view.
9. 9 . The display device of claim 2 , wherein the input sensor unit further includes an insulating layer, wherein the pen sensing line, the peripheral pen sensing electrode, and a first line part of the sensing line are disposed on the base layer, wherein the insulating layer covers the pen sensing line, the peripheral pen sensing electrode, and the first line part, wherein a second line part of the sensing line is disposed on the insulating layer, wherein the insulating layer has a contact hole defined therein, and wherein the first line part and the second line part are electrically connected with each other through the contact hole.
10. 10 . The display device of claim 2 , wherein the sensing line overlaps the pen sensing line when viewed in a plan view.
11. 11 . The display device of claim 2 , wherein the sensing line overlaps the peripheral pen sensing electrode when viewed in a plan view.
12. 12 . The display device of claim 1 , wherein the peripheral pen sensing electrode is electrically connected to the pair of first pen sensing electrodes.
13. 13 . The display device of claim 1 , wherein the peripheral pen sensing electrode has a larger area than the plurality of conductive lines when viewed in a plan view.
14. 14 . An input sensor unit comprising: a base layer having an active region and a peripheral region, the peripheral region being adjacent to the active region; an insulating layer disposed on the base layer, a plurality of sensing electrodes disposed in the active region and disposed on the base layer; a plurality of conductive lines disposed in the peripheral region and disposed on the base layer, the plurality of conductive lines being electrically connected to the plurality of sensing electrodes; and a peripheral pen sensing electrode disposed in the peripheral region and spaced apart from the plurality of sensing electrodes, wherein the plurality of conductive lines are disposed between the peripheral pen sensing electrode and the active region in which the plurality of sensing electrodes are disposed, and wherein the peripheral pen sensing electrode extends lengthwise in a first direction, and wherein the plurality of sensing electrodes include: a first sensing electrode; a second sensing electrode insulated from the first sensing electrode and extending across the first sensing electrode; a pair of first pen sensing electrodes extending in the first direction and including a first pen sensing electrode insulated from the second sensing electrode and extending across the second sensing electrode, the first pen sensing electrode being adjacent to the first sensing electrode; and a second pen sensing electrode insulated from the first sensing electrode and the first pen sensing electrode and extending across the first sensing electrode and the first pen sensing electrode in a second direction different from the first direction, the second pen sensing electrode being adjacent to the second sensing electrode, wherein the plurality of conductive lines include: a sensing line electrically connected to the second sensing electrode; and a pen sensing line electrically connected to the second pen sensing electrode, and wherein a first width of the peripheral pen sensing electrode along a majority of a length thereof in the first direction is greater in the second direction than a second width of the sensing line in the second direction.
15. 15 . The input sensor unit of claim 14 , wherein the pen sensing line and the peripheral pen sensing electrode are disposed in the same layer.
16. 16 . The input sensor unit of claim 14 , wherein the pen sensing line and the peripheral pen sensing electrode are disposed in a layer different from a layer in which the sensing line is disposed.
17. 17 . The input sensor unit of claim 14 , wherein the pen sensing line and the peripheral pen sensing electrode are disposed on the base layer, wherein the insulating layer covers the pen sensing line and the peripheral pen sensing electrode, and wherein the sensing line is disposed on the insulating layer.
18. 18 . The input sensor unit of claim 14 , wherein a first pen sensing line part of the pen sensing line and a first sensing part of the peripheral pen sensing electrode are disposed on the base layer, wherein the insulating layer covers the first pen sensing line part and the first sensing part, wherein the sensing line, a second pen sensing line part of the pen sensing line, and a second sensing part of the peripheral pen sensing electrode are disposed on the insulating layer, wherein the insulating layer has a first contact hole and a second contact hole defined therein, wherein the first pen sensing line part and the second pen sensing line part are electrically connected with each other through the first contact hole, and wherein the first sensing part and the second sensing part are electrically connected with each other through the second contact hole.
19. 19 . The input sensor unit of claim 18 , wherein the first sensing part has a greater width than the second sensing part in the second direction.
20. 20 . The input sensor unit of claim 14 , wherein the pen sensing line, the peripheral pen sensing electrode, and a first line part of the sensing line are disposed on the base layer, wherein the insulating layer covers the pen sensing line, the peripheral pen sensing electrode, and the first line part, wherein a second line part of the sensing line is disposed on the insulating layer, wherein the insulating layer has a contact hole defined therein, and wherein the first line part and the second line part are electrically connected through the contact hole.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2022-0185634 filed on Dec. 27, 2022, in the Korean Intellectual Property Office, the disclosures of which are incorporated by reference herein in their entireties. BACKGROUND Embodiments of the present disclosure described herein relate to an input sensor unit having improved sensing reliability for an input device and a display device including the input sensor unit. An electronic device, such as a smart phone, a digital camera, a notebook computer, a car navigation unit, a smart television, and the like, which provides an image to a user includes a display device for displaying an image. The display device generates an image and provides the image to the user through a display screen. The display device includes a display panel that displays an image, a touch panel that is disposed on the display panel and that senses a touch of the user, and a digitizer that is disposed under the display panel and that senses a touch of a pen. The digitizer may be implemented in an electromagnetic type or an electromagnetic resonance type. The digitizer includes a plurality of coils. When the user moves the pen on the display device, the pen is driven by an AC signal to cause an oscillating magnetic field, and the oscillating magnetic field induces a signal to the coils. The position of the pen is detected through the signal of the coils. The digitizer recognizes the position of the pen by sensing an electromagnetic change caused by access of the pen. Two input devices, such as the touch panel and the digitizer, may be separately used, and therefore the thickness of the display device may be increased. Accordingly, the development of a technology for decreasing the thickness of the display device is desirable. SUMMARY Embodiments of the present disclosure provide an input sensor unit having improved sensing reliability and a display device including the same. According to an embodiment, a display device includes a display panel, and an input sensor unit disposed on the display panel, the input sensor unit having an active region and a peripheral region, the peripheral region being adjacent to the active region. The input sensor unit includes a base layer, a plurality of sensing electrodes disposed in the active region and disposed on the base layer, a plurality of conductive lines disposed in the peripheral region and disposed on the base layer, the plurality of conductive lines being electrically connected to the plurality of sensing electrodes, and a peripheral pen sensing electrode disposed in the peripheral region and spaced apart from the plurality of sensing electrodes, wherein the plurality of conductive lines are disposed between the peripheral pen sensing electrode and the active region in which the plurality of sensing electrodes are disposed, and wherein the peripheral pen sensing electrode extends lengthwise in a first direction. The plurality of sensing electrodes include a first sensing electrode, a second sensing electrode insulated from the first sensing electrode and extending across the first sensing electrode, a pair of first pen sensing electrodes extending in a second direction different from the first direction and including a 1-1 first pen sensing electrode insulated from the second sensing electrode and extending across the second sensing electrode, the 1-1 first pen sensing electrode being adjacent to the first sensing electrode, and a 1-2 first pen sensing electrode disposed in a layer different from a layer in which the first sensing electrode and the pen sensing electrode 1-1 are disposed, the 1-2 first pen sensing electrode being electrically connected to the 1-1 first pen sensing electrode and overlapping a portion of the second sensing electrode when viewed in a plan view, and a second pen sensing electrode insulated from the first sensing electrode and the 1-1 first pen sensing electrodes and extending across the first sensing electrode and the 1-1 first pen sensing electrodes in the second direction, the second pen sensing electrode being adjacent to the second sensing electrode. A first width of the peripheral pen sensing electrode in the second direction is greater than a second width of each of the plurality of conductive lines in the second direction. The plurality of conductive lines may include a sensing line electrically connected to the second sensing electrode and a pen sensing line electrically connected to the second pen sensing electrode. The pen sensing line and the peripheral pen sensing electrode may be disposed in the same layer. The pen sensing line and the peripheral pen sensing electrode may be disposed in a layer different from a layer in which the sensing line is disposed. The input sensor unit may further include an insulating layer. The pen sensing line and the peripheral pen sensing electrode may be disposed on the base layer. The insul