EP-4250073-B1 - DISPLAY DEVICE CAPABLE OF SENSING USER INPUT

Inventors

• KIM, MIYOUNG
• PARK, SOYEON
• PARK, YONG-HWAN
• JUN, Sanghyun

Dates

Publication Date

20260513

Application Date

20230314

Claims (11)

1. A display device (DD) comprising: a display panel (DP) including a display region (AA) and a non-display region (NAA); and an input sensing device (ISU) disposed on the display panel (DP), wherein the input sensing device (ISU) comprises: a first sensing insulation layer (TIL1) directly disposed on the display panel (DP); a first sensing conductive layer (TML1) disposed on the first sensing insulation layer (TILT); a second sensing insulation layer (TIL2) disposed on the first sensing insulation layer (TILL) and covering the first sensing conductive layer (TML1); a second sensing conductive layer (TML2) disposed on the second sensing insulation layer (TIL2); a dummy line (DML) disposed on the second sensing insulation layer (TIL2); wherein the first sensing conductive layer (TML1) comprises: a plurality of sensing patterns (SP1, SP2) overlapping the display region (AA-I), and arranged in a plurality of rows and a plurality of columns, wherein the input sensing device (ISU) further comprises a plurality of sensing pads (PD) overlapping the non-display region (NAA-I), and wherein a plurality of sensing lines (TL-1, TL-2, TL-3) connecting the plurality of sensing patterns (SP1, SP2) and the plurality of sensing pads (PD), respectively, wherein the plurality of sensing patterns (SP1, SP2) are included in the first sensing conductive layer (TML1); wherein the second sensing insulation layer (TIL2) includes an organic film, and a first thickness (d1) of the first sensing conductive layer (TML1) is greater than a second thickness (d2) of the second sensing conductive layer (TML2), and wherein an upper surface (TML2-US) of the second sensing conductive layer (TML2) defines an uppermost surface of the input sensing device (ISU), wherein the input sensing device (ISU) comprises: a first non-bending region (NBA1) overlapping the display region (AA-I); a second non-bending region (NBA2) opposing the first non-bending region (NBA1); and a bending region (BA) disposed between the first non-bending region (NBA1) and the second non-bending region (NBA2) and having a predetermined radius of curvature, wherein each of the plurality of sensing lines (TL-1, TL-2, TL-3) comprises: a first portion (TL-S1) disposed in the first non-bending region (NBA1); and a second portion (TL-S2) disposed in the bending region (BA) and connected to the first portion (TL-S1), wherein the first portion (TL-S1) is included in the first sensing conductive layer (TML1) and the second portion (TL-S2) is included in the second sensing conductive layer (TML2), wherein the dummy line (DML) is disposed adjacent to the second portion (TL-S2) of each of the plurality of sensing lines (TL-1, TL-2, TL-3), and included in the second sensing conductive layer (TML2).
2. The display device of claim 1, wherein the first thickness (d1) is 1.5 times to 4.0 times the second thickness (d2).
3. The display device of claim 1, wherein the first thickness is 2000 Å to 4000 Å, and the second thickness is 700 Å to 1500 Å.
4. The display device of claim 1, wherein the input sensing device (ISU) further comprises a plurality of connection patterns (BP1) connecting adjacent sensing patterns (SP1) among the plurality of sensing patterns (SP1, SP2), wherein the plurality of connection patterns (BP1) are included in the second sensing conductive layer (TML2).
5. The display device of claim 4, wherein a length of the plurality of connection patterns (BP1) on a plane is 5 mm or less.
6. The display device of claim 1, wherein the second portion (TL-S2) is disposed in a central portion of the bending region (BA), and the dummy line (DML) is disposed at an outer periphery portion of the bending region (BA).
7. The display device of one of claims 1 to 6, further comprising a bending protective layer (BPL) overlapping the bending region (BA), and covering at least a portion of the second portion (TL-S2).
8. The display device of one of claims 1 to 7, wherein a width of the second portion (TL-S2) is greater than a width of the first portion (TL-S1).
9. The display device of one of claims 1 to 8, wherein a pad contact hole (CNT-2) exposing at least some of the plurality of sensing pads (PD) is defined in the second sensing insulation layer (TIL2), wherein the second portion (TL-S2) is electrically connected to the plurality of sensing pads (PD) through the pad contact hole (CNT-2).
10. The display device of one of claims 1 to 9, wherein one side surface (S1) of the input sensing device (ISU) spaced apart from the bending region (BA) is defined in the second non-bending region (NBA2), wherein an end of the second sensing insulation layer (TIL2) is aligned with the one side surface (S1) of the second non-bending region (NBA2).
11. The display device of one of the preceding claims, wherein an electrode contact hole (CNT-1) exposing at least a portion of the first sensing conductive layer (TML1), and overlapping the display region (AA-I) is defined in the second sensing insulation layer (TIL2), wherein the second sensing conductive layer (TML2) is electrically connected to the first sensing conductive layer (TML1) through the electrode contact hole (CNT-1).

Description

1. Technical Field The present disclosure herein relates to a display device, and more particularly, to a display device capable of sensing user inputs that can be manufactured with less processing steps. 2. Discussion of Related Art An electronic device which provides images to a user, such as a smart phone, a digital camera, a notebook computer, a GPS, and a television, includes a display device for displaying the images. The display device may include a display panel which generates and displays images, and an input device such as a keyboard, a mouse, or an input sensing unit for sensing user inputs such as touches by a user of a surface of the display device. The input sensing unit is disposed on the display panel and includes a touch panel. When the user touches the touch panel, an input signal is generated. The input signal generated from the touch panel is provided to the display panel, and the display panel may provide an image corresponding to the input signal in response to the input signal provided from the touch panel. For example, US 2021/0365155 A1 discloses An electronic device includes a first sensing electrode, a second sensing electrode, a first conductive pattern disposed between the first sensing electrode and the second sensing electrode and including a plurality of first repeating units electrically connected to each other, and a second conductive pattern disposed between the first sensing electrode and the second sensing electrode and including a plurality of second repeating units electrically connected to each other. US 2021/0191570 A1 describes a touch substrate which includes: a base substrate; a plurality of touch electrodes located on the base substrate; a touch electrode bridge located on the base substrate and configured to connect the plurality of touch electrodes; and a plurality of first insulating patterns located on a surface of the touch electrode bridge away from the base substrate, in which the plurality of first insulating patterns is arranged in such a manner that adjacent first insulating patterns are separated from each other; and a plurality of second insulating patterns each located between the adjacent first insulating patterns. CN 113268164 A relates to a touch control structure and a display device wherein the touch control structure comprises a metal layer, a first insulating layer, a touch control electrode layer and a second insulating layer which are arranged on a substrate in a stacked mode, the touch control electrode layer comprises a first touch control electrode and a second touch control electrode which are insulated from each other, the metal layer comprises a bridging part, and the bridging part is configured to conductively bridge the first touch electrode or the second touch electrode at the intersection of the first touch electrode and the second touch electrode. US 2021/0200363 A1 discloses a touch display panel having a display unit including a plurality of pixels, an encapsulation unit disposed on the display unit, a touch sensor unit including a plurality of touch sensors disposed on the encapsulation unit, a color filter layer disposed on the touch sensor unit, the color filter layer including a color filter and a black matrix. US 2022/0028935 A1 describes a display device including a substrate having an active area, a visible region located on the active area, and a non-visible region farther from the active area in a first direction than the visible region is; a first conductive layer disposed on the substrate; a first insulating layer disposed on the first conductive layer; a second conductive layer disposed on the first insulating layer; a first via layer disposed on the second conductive layer; a second insulating layer disposed on the first via layer; and a third conductive layer disposed on the second insulating layer and including touch signal lines. US 2021/0026473 A1 relates to a display device including a display member including a substrate having an active area and a non-active area, and light-emitting elements disposed on the substrate, the non-active area including a bending region, and a touch member disposed on the display member and having a main touch area, in which the touch member includes touch electrodes disposed in the main touch area and touch lines connected to the touch electrodes. However, present manufacturing technology includes several complex steps that increases costs and may result in defects that reduce reliability of a display device that includes an input sensing unit. While removal of a layer of the display device could reduce the number of manufacturing steps, such removal may result in a short circuit within the input sensing unit that reduces reliability. SUMMARY The present disclosure may provide a display device with increased reliability by simplifying process steps for the formation of an input sensing unit, thereby reducing process costs and time, and by preventing the occurrence of short circui