US-20260130080-A1 - LIGHT EMITTING DISPLAY DEVICE

US20260130080A1US 20260130080 A1US20260130080 A1US 20260130080A1US-20260130080-A1

Abstract

A light emitting display device includes: a display panel including: a display area; and a first pixel and a second pixel at the display area; and an optical element on a rear surface of the second pixel. The second pixel includes: a photosensor area; and a shielding layer at the photosensor area, the shielding layer being transparent and conductive.

Inventors

Yun-Kyeong In
SEOYEONG KIM
Seung Woo SUNG
Jun Young JO
Won Se Lee
Ji-Eun Lee

Assignees

SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20251230
Priority Date: 20220721

Claims (10)

1 . A light emitting display device comprising: a display panel comprising: a display area; and a first pixel and a second pixel at the display area; and an optical element on a rear surface of the second pixel, wherein the second pixel comprises: a photosensor area; and a shielding layer at the photosensor area, the shielding layer being transparent and conductive.
2 . The light emitting display device of claim 1 , wherein the shielding layer is a plasma-treated or doped portion of an oxide semiconductor layer to be conductive.
3 . The light emitting display device of claim 1 , wherein the shielding layer comprises a transparent conductive material.
4 . The light emitting display device of claim 1 , wherein the first pixel comprises: a first semiconductor layer on a substrate; a first gate conductive layer on the first semiconductor layer; a second gate conductive layer on the first gate conductive layer; an oxide semiconductor layer on the second gate conductive layer, and comprising the shielding layer; a third gate conductive layer on the oxide semiconductor layer; a first data conductive layer on the third gate conductive layer; and a second data conductive layer on the first data conductive layer, the second data conductive layer of the first pixel comprising a data line, and a main auxiliary data line extending in a direction parallel to the data line, and wherein the second pixel comprises: the first semiconductor layer on the substrate; the first gate conductive layer on the first semiconductor layer; the second gate conductive layer on the first gate conductive layer; the oxide semiconductor layer on the second gate conductive layer, and comprising the shielding layer; the third gate conductive layer on the oxide semiconductor layer; the first data conductive layer on the third gate conductive layer; and the second data conductive layer on the first data conductive layer, the second data conductive layer of the second pixel comprising a data line, and not including a main auxiliary data line.
5 . The light emitting display device of claim 4 , wherein the data line of the second pixel has a structure that is symmetrically bent together with a structure of an adjacent data line, and the photosensor area is located in an area defined by the symmetrically bent structures, wherein the data line of the first pixel extends in one direction and has an unbent structure, and wherein the data line of the first pixel comprises a pair of data lines facing each other, and the main auxiliary data line is located at opposite sides of the pair of data lines.
6 . The light emitting display device of claim 4 , wherein: the first semiconductor layer included in each of the first pixel and the second pixel includes a first region, a channel, and a second region of a corresponding driving transistor; and the shielding layer included in each of the first pixel and the second pixel overlaps with the first region of the corresponding driving transistor in a plan view.
7 . The light emitting display device of claim 6 , wherein the data line of the first pixel comprises a pair of data lines, the main auxiliary data line comprises a pair of main auxiliary data lines, and the shielding layer included in the first pixel overlaps with the pair of data lines and the pair of main auxiliary data lines.
8 . The light emitting display device of claim 7 , wherein the shielding layer included in the second pixel overlaps with the photosensor area.
9 . The light emitting display device of claim 4 , wherein the first data conductive layer included in the first pixel comprises an additional auxiliary data line, and the additional auxiliary data line has an extension direction crossing the extension direction of the data line and the main auxiliary data line.
10 . The light emitting display device of claim 9 , wherein the first data conductive layer included in the second pixel includes an additional auxiliary data line.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is a divisional of U.S. patent application Ser. No. 18/172,230, filed on Feb. 21, 2023, which claims priority to and the benefit of Korean Patent Application No. 10-2022-0090533, filed in the Korean Intellectual Property Office on Jul. 21, 2022, the entire content of both of which is incorporated by reference herein. BACKGROUND 1. Field Aspects of embodiments of the present disclosure relate to a light emitting display device. 2. Description of the Related Art A display device is a device for displaying an image, and includes a liquid crystal display (LCD), an organic light emitting diode (OLED) display, and the like. The display device is used in various electronic devices, such as a mobile phone, a navigation device, a digital camera, an electronic book, a portable game machine, and various terminals. The display device, such as the organic light emitting device, may have a structure in which the display device may be bent or folded using a flexible substrate. In addition, in small electronic devices, such as the mobile phone, optical elements, such as cameras and optical sensors, may be formed in the bezel area, which is the periphery of the display area. 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 As the size of the peripheral area of the display area is gradually being reduced, while the size of the display screen is increased, technology is being developed that allows the camera or the optical sensor to be positioned on the rear surface of the display area. One or more embodiments of the present disclosure are directed to a display device having a reduced area of the non-display area that is positioned around the display area. One or more embodiments of the present disclosure are directed to a display device having improved display quality. One or more embodiments of the present disclosure are directed to a display device in which a display deterioration thereof may be prevented or reduced. According to one or more embodiments of the present disclosure, a light emitting display device includes: a display panel including: a display area; and a first pixel and a second pixel at the display area; and an optical element on a rear surface of the second pixel. The first pixel includes: a first semiconductor layer on a substrate; a first gate conductive layer on the first semiconductor layer; a second gate conductive layer on the first gate conductive layer; an oxide semiconductor layer on the second gate conductive layer, and including a shielding layer; a third gate conductive layer on the oxide semiconductor layer; a first data conductive layer on the third gate conductive layer; and a second data conductive layer on the first data conductive layer, the second data conductive layer of the first pixel including a data line, and a main auxiliary data line extending in a direction parallel to that of the data line. The second pixel includes: the first semiconductor layer on the substrate; the first gate conductive layer on the first semiconductor layer; the second gate conductive layer on the first gate conductive layer; the oxide semiconductor layer on the second gate conductive layer, and including the shielding layer; the third gate conductive layer on the oxide semiconductor layer; the first data conductive layer on the third gate conductive layer; and the second data conductive layer on the first data conductive layer, the second data conductive layer of the second pixel including a data line, and not including a main auxiliary data line. In an embodiment, the shielding layer may be transparent and conductive. In an embodiment, the data line of the second pixel may have a structure that may be symmetrically bent together with a structure of an adjacent data line, and a photosensor area may be located in an area defined by the symmetrically bent structures. In an embodiment, the data line of the first pixel may extend in one direction, and may have an unbent structure. In an embodiment, the data line of the first pixel may include a pair of data lines facing each, and the main auxiliary data line may be located at opposite sides of the pair of data lines. In an embodiment, the first semiconductor layer included in each of the first pixel and the second pixel may include a first region, a channel, and a second region of a corresponding driving transistor, and the shielding layer included in each of the first pixel and the second pixel may overlap with the first region of the corresponding driving transistor in a plan view. In an embodiment, the data line of the first pixel may include a pair of data lines, the main auxiliary data line may include a pair of main auxiliary data lines, and the shielding layer included in the first pixel may overlap with the pair of data line