US-20260130088-A1 - DISPLAY DEVICE

US20260130088A1US 20260130088 A1US20260130088 A1US 20260130088A1US-20260130088-A1

Abstract

A display device includes: a substrate; a plurality of light emitting parts on the substrate, and to emit light; a plurality of light sensing parts on the substrate, and to sense incident light; a bank layer partitioning the plurality of light emitting parts and the plurality of light sensing parts; and a touch sensing layer including a touch electrode on the bank layer. A first distance between one light sensing part from among the plurality of light sensing parts and the touch electrode in one direction is smaller than a second distance between a first light emitting part of the plurality of light emitting parts and the touch electrode in the one direction.

Inventors

Min Oh Choi
Gee Bum KIM
Kwang Soo BAE
Bo Kwang SONG
Dae Young Lee

Assignees

SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20251229
Priority Date: 20211001

Claims (17)

1 . A display device comprising: a substrate; a first pixel electrode and a first electrode on the substrate; a bank layer on the first pixel electrode and the first electrode; a first light emitting part emitting a first light and defined as an area in which the first pixel electrode is exposed by the bank layer; a light sensing part configured to sense incident light and defined as an area in which the first electrode is exposed by the bank layer, the light sensing part being spaced apart from the first light emitting part in a first direction; and a touch sensing layer including a touch electrode on the bank layer, wherein the touch electrode comprises a first portion disposed between the light sensing part and the first light emitting part in a plan view and in the first direction, wherein the first portion of the touch electrode extends in a second direction different from the first direction, and wherein a first distance between the light sensing part and the first portion of the touch electrode in the first direction is smaller than a second distance between the first light emitting part and the first portion of the touch electrode in the first direction.
2 . The display device of claim 1 , wherein a width of the light sensing part in the first direction is greater than the first distance.
3 . The display device of claim 2 , wherein a ratio of the width of the light sensing part to the first distance in the first direction is greater than 2.2 and smaller than 3.5.
4 . The display device of claim 3 , wherein a width of the first light emitting part in the first direction is greater than the width of the light sensing part in the first direction.
5 . The display device of claim 1 , wherein the touch electrode overlaps with the bank layer.
6 . The display device of claim 5 , wherein a width of the touch electrode in the first direction is smaller than a width of the light sensing part in the first direction.
7 . The display device of claim 5 , wherein the touch electrode includes a mesh pattern.
8 . The display device of claim 1 , wherein the second direction is perpendicular to the first direction.
9 . The display device of claim 1 , further comprising: a second light emitting part emitting a second light and defined as an area in which a second pixel electrode is exposed by the bank layer; and a third light emitting part emitting a third light and defined as an area in which a third pixel electrode is exposed by the bank layer, wherein the light sensing part is adjacent to the first light emitting part in the first direction with the first portion of the touch electrode interposed therebetween, wherein the light sensing part is disposed between the second light emitting part and the third light emitting part in the second direction, and wherein the first light, the second light, and the third light respectively have different colors of light.
10 . The display device of claim 9 , wherein the touch electrode further comprises a second portion disposed between the second light emitting part and the third light emitting part in a plan view and in the first direction, wherein the second portion of the touch electrode extends in the second direction, and wherein the second portion of the touch electrode does not overlap with the second pixel electrode and the third pixel electrode.
11 . The display device of claim 10 , wherein the first portion of the touch electrode overlaps with the first electrode, wherein the touch electrode overlaps with the bank layer.
12 . The display device of claim 9 , wherein the first light is a green light, the second light is a red light, and the third light is a blue light.
13 . The display device of claim 9 , further comprising: a fourth light emitting part emitting a fourth light and defined as an area in which a fourth pixel electrode is exposed by the bank layer, wherein the touch electrode further comprises a third portion disposed between the light sensing part and the fourth light emitting part in the plan view and in the first direction, wherein the third portion of the touch electrode extends in the second direction between the light sensing part and the fourth light emitting part, wherein the third portion of the touch electrode is connected to the first portion of the touch electrode, and wherein a third distance between the light sensing part and the third portion of the touch electrode in the first direction is smaller than a fourth distance between the fourth light emitting part and the third portion of the touch electrode in the first direction.
14 . The display device of claim 13 , wherein the first light emitting parts, the light sensing parts, and the fourth light emitting part are repeatedly arranged along the first direction.
15 . The display device of claim 14 , wherein the fourth light is a green light.
16 . The display device of claim 1 , further comprising: an emission layer in the first light emitting part on the substrate; a photoelectric conversion layer in the light sensing part on the substrate; and a common electrode on the emission layer and the photoelectric conversion layer.
17 . An electronic device comprising: a display device configured to display an image, wherein the display device includes: a substrate; a first pixel electrode and a first electrode on the substrate; a bank layer on the first pixel electrode and the first electrode; a first light emitting part emitting a first light and defined as an area in which the first pixel electrode is exposed by the bank layer; a light sensing part configured to sense incident light and defined as an area in which the first electrode is exposed by the bank layer, the light sensing part being spaced apart from the first light emitting part in a first direction; and a touch sensing layer including a touch electrode on the bank layer, wherein the touch electrode comprises a first portion disposed between the light sensing part and the first light emitting part in a plan view and in the first direction, wherein the first portion of the touch electrode extends in a second direction different from the first direction, and wherein a first distance between the light sensing part and the first portion of the touch electrode in the first direction is smaller than a second distance between the first light emitting part and the first portion of the touch electrode in the first direction.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of U.S. patent application Ser. No. 17/867,461, filed Jul. 18, 2022, which claims priority to and the benefit of Korean Patent Application No. 10-2021-0130549, filed on Oct. 1, 2021 in the Korean Intellectual Property Office, the entire content of both of which is incorporated herein by reference. BACKGROUND 1. Field Aspects of one or more embodiments of the present disclosure relate to a display device. 2. Description of the Related Art The importance of display devices has increased with the development of multimedia. Accordingly, various types of display devices, such as a liquid crystal display (LCD) and an organic light emitting display (OLED), have been used. From among the display devices, the organic light emitting display displays an image by using an organic light emitting diode (OLED) for generating light by recombination of electrons and holes. Such an organic light emitting display may have a fast response speed, a large luminance, and a wide viewing angle, and may be driven with low power consumption. Recently, research and development for integrating sensors for touch recognition or fingerprint recognition in a display panel has been conducted. In this case, some of the light emitted from a light emitting part may be reflected by a touch electrode, and may move to and be incident on an optical sensor for fingerprint recognition, and thus, may act as noise. The above information disclosed in this Background section is for enhancement of understanding of the background of the present disclosure, and therefore, it may contain information that does not constitute prior art. SUMMARY One or more embodiments of the present disclosure are directed to a display device in which light reflected by a touch electrode of a touch sensing layer that may be incident on an optical sensor may be reduced, minimized, or prevented. However, the aspects and features of the present disclosure are not limited to those set forth above. The above and other aspects and features of the present disclosure will become more apparent to those having ordinary skill in the art to which the present disclosure pertains from the detailed description of the present disclosure below with reference to the figures. According to one or more embodiments of the present disclosure, a display device includes: a substrate; a plurality of light emitting parts on the substrate, and configured to emit light; a plurality of light sensing parts on the substrate, and configured to sense incident light; a bank layer partitioning the plurality of light emitting parts and the plurality of light sensing parts; and a touch sensing layer including a touch electrode on the bank layer. A first distance between one light sensing part from among the plurality of light sensing parts and the touch electrode in one direction is smaller than a second distance between a first light emitting part of the plurality of light emitting parts and the touch electrode in the one direction. In an embodiment, a width of the one light sensing part in the one direction may be greater than the first distance. In an embodiment, a ratio of the width of the one light sensing part to the first distance in the one direction may be greater than 2.2 and smaller than 3.5. In an embodiment, a width of the first light emitting part in the one direction may be greater than the width of the one light sensing part in the one direction. In an embodiment, the touch electrode may overlap with the bank layer. In an embodiment, a width of the touch electrode may be smaller than a width of the one light sensing part. In an embodiment, the touch electrode may include a mesh pattern. In an embodiment, the first light emitting part may include a plurality of first light emitting parts, and the first light emitting parts and the light sensing parts may be repeatedly arranged along the one direction. In an embodiment, the first light emitting parts may be configured to emit light having a green wavelength. In an embodiment, the display device may further include: an emission layer in each of the plurality of light emitting parts on the substrate; a photoelectric conversion layer in each of the plurality of light sensing parts on the substrate; and a common electrode on the emission layer and the photoelectric conversion layer. According to one or more embodiments of the present disclosure, a display device includes: a substrate; a pixel electrode and a first electrode on the substrate; a bank layer exposing the pixel electrode and the first electrode; an emission layer on the pixel electrode; a photoelectric conversion layer on the first electrode; a common electrode on the emission layer, the photoelectric conversion layer, and the bank layer; a touch sensing layer including a touch electrode on the bank layer; a first hole defined by the touch electrode, and overlapping with the emission layer; and a second hole overlappi