US-20260130069-A1 - Display Device

US20260130069A1US 20260130069 A1US20260130069 A1US 20260130069A1US-20260130069-A1

Abstract

A display device is disclosed that comprises a display area including an optical area through which light is transmittable, an optical bezel area outside the optical area, and a normal area outside the optical bezel area, a substrate overlapping the optical bezel area and the normal area, an electronic device overlapping the optical area and partially overlapping the optical bezel area, a first transistor and a second transistor disposed in the optical bezel area, a first light emitting element disposed in the optical bezel area and connected to a first transistor, and a second light emitting element disposed in the optical area and connected to the second transistor, wherein the first transistor, the second transistor, and the first light emitting element are disposed on the substrate, and the second light emitting element is disposed on the electronic device.

Inventors

JungSik JO
Chulho Kim

Assignees

LG DISPLAY CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20250924
Priority Date: 20241105

Claims (20)

1 . A display device, comprising: a display area including an optical area through which light is transmittable, an optical bezel area that at least partially surrounds the optical area in a plan view of the display device, and a normal area that at least partially surrounds the optical bezel area in the plan view; a substrate overlapping the optical bezel area and the normal area but does not overlap the optical area; an electronic device overlapping the optical area and partially overlapping the optical bezel area; a first transistor and a second transistor in the optical bezel area; a first light emitting element in the optical bezel area, the first light emitting element connected to the first transistor; and a second light emitting element in the optical area, the second light emitting element connected to the second transistor that is in the optical bezel area, wherein the first transistor, the second transistor, and the first light emitting element are on the substrate in the optical bezel area and the second light emitting element is on the electronic device in the optical area.
2 . The display device of claim 1 , further comprising: a first connection electrode in the optical bezel area, the first connection electrode electrically connecting an anode electrode of the first light emitting element to one electrode of the first transistor; a common electrode to which a cathode voltage is applied, the common electrode on the substrate in the optical bezel area; and a second connection electrode in the optical bezel area, the second connection electrode electrically connecting a cathode electrode of the first light emitting element to the common electrode, wherein the first connection electrode and the second connection electrode include a transparent conductive material.
3 . The display device of claim 1 , further comprising: a common electrode to which a cathode voltage is applied, the common electrode on the substrate in the optical bezel area; a first transparent line on the electronic device, the first transparent line positioned in the optical area and the optical bezel area; and a second transparent line on the electronic device, the second transparent line positioned in the optical area and the optical bezel area, wherein an anode electrode of the second light emitting element is electrically connected to one electrode of the second transistor through the first transparent line and a cathode electrode of the second light emitting element is electrically connected to the common electrode through the second transparent line, wherein the first transparent line and the second transparent line include a transparent conductive material.
4 . The display device of claim 3 , further comprising: a first via hole in the substrate; a first conductive pattern in the first via hole, the first conductive pattern electrically connecting one electrode of the second transistor and the first transparent line; a second via hole in the substrate; and a second conductive pattern in the second via hole, the second conductive pattern electrically connecting the common electrode and the second transparent line.
5 . The display device of claim 4 , wherein the substrate includes a first area and a second area surrounding the first area, wherein the electronic device includes a third area and a fourth area that overlaps the first area and the fourth area surrounds the third area and is under the first area, wherein the first via hole and the second via hole are in the first area.
6 . The display device of claim 4 , further comprising: a first connection pad on a first surface of the first via hole; a second connection pad on a first surface of the second via hole; a first bonding pad on a second surface of the first via hole that is opposite the first surface of the first via hole; a second bonding pad on a second surface of the second via hole that is opposite the first surface of the second via hole; a first conductive pattern which is a first conductive material that fills the first via hole; and a second conductive pattern which is a second conductive material that fills the second via hole.
7 . The display device of claim 1 , further comprising: a planarization layer in the normal area, the optical bezel area, and the optical area, the planarization layer on the first light emitting element and the second light emitting element, wherein the planarization layer includes a transparent insulating material.
8 . The display device of claim 1 , wherein the electronic device is a camera or a detection sensor that is configured to perform a predetermined operation by receiving light.
9 . The display device of claim 1 , wherein the first light emitting element and the second light emitting element are light emitting diode (LED) chips of different types, wherein the first light emitting element is a first LED chip having a lateral chip structure and the second light emitting element is a second LED chip having a flip chip structure that is different from the lateral chip structure.
10 . The display device of claim 3 , further comprising: a third light emitting element in the optical area, wherein an anode electrode of the third light emitting element is electrically connected to one electrode of the second transistor through the first transparent line, and a cathode electrode of the third light emitting element is electrically connected to the common electrode through the second transparent line.
11 . A display device, comprising: an upper substrate including a first area and a second area that surrounds the first area in a plan view of the display device; a lower substrate including a third area and a fourth area that surrounds the third area in the plan view, the fourth area positioned under the first area; a first via hole and a second via hole in the first area of the upper substrate; a first transistor on the upper substrate; a second transistor on the upper substrate; a common electrode to which a cathode voltage is applied, the common electrode on the upper substrate; a first light emitting element on the upper substrate; a second light emitting element on the lower substrate; a first transparent line electrically connected to an anode electrode of the second light emitting element; a first conductive pattern in the first via hole, the first conductive pattern electrically connecting one electrode of the second transistor and the first transparent line; a second transparent line electrically connected to a cathode electrode of the second light emitting element; and a second conductive pattern in the second via hole, the second conductive pattern electrically connecting the common electrode and the second transparent line, wherein the first transparent line and the second transparent line include a first transparent conductive material.
12 . The display device of claim 11 , further comprising: a first connection electrode connecting an anode electrode of the first light emitting element to the first transistor; and a second connection electrode connecting a cathode electrode of the first light emitting element to the common electrode, wherein the first connection electrode and the second connection electrode include a second transparent conductive material.
13 . The display device of claim 11 , wherein the lower substrate is an electronic device that is configured to perform a determined operation by receiving light.
14 . The display device of claim 11 , wherein the first light emitting element is a first light emitting diode chip having a lateral chip structure and the second light emitting element is a second light emitting diode chip having a flip chip structure that is different from the lateral chip structure.
15 . The display device of claim 11 , further comprising: a planarization layer on the first light emitting element and the second light emitting element, the planarization layer including a transparent insulating material.
16 . The display device of claim 11 , further comprising: a third light emitting element on the lower substrate, wherein an anode electrode of the third light emitting element is electrically connected to one electrode of the second transistor through the first transparent line, and a cathode electrode of the third light emitting element is electrically connected to the common electrode through the second transparent line.
17 . The display device of claim 11 , further comprising: a first connection pad on a first surface of the first via hole; a second connection pad on a first surface of second via hole; a first bonding pad on a second surface of the first via hole that is opposite the first surface of the first via hole; and a second bonding pad on a second surface of the second via hole that is opposite the first surface of the second via hole.
18 . A display device, comprising: a display area including an optical area and an optical bezel area that surrounds the optical area in a plan view of the display device, wherein the optical bezel area is less transmissive of light than the optical area; an electronic device overlapping the optical area and partially overlapping the optical bezel area; a first transistor in the optical bezel area; a common electrode to which a cathode voltage is applied,, the common electrode in the optical bezel area; a first light emitting element in the optical bezel area, the first light emitting element connected to the first transistor; a first connection electrode in the optical bezel area, the first connection electrode surrounding the optical area in the plan view and electrically connecting an anode electrode of the first light emitting element to the first transistor; and a second connection electrode surrounding the optical area and disposed between the first connection electrode and the optical area in the optical bezel area in the plan view, the second connection electrode electrically connecting a cathode electrode of the first light emitting element and the common electrode.
19 . The display device of claim 18 , further comprising: a second transistor in the optical bezel area; and a second light emitting element on the electronic device in the optical area, the second light emitting element connected to the second transistor, wherein a height of the first light emitting element is higher than a height of the second light emitting element, wherein a planarization layer is disposed over the second light emitting element in the optical area and over the first light emitting element in the optical bezel area.
20 . The display device of claim 19 , further comprising: a first transparent line on the electronic device, the first transparent line positioned in the optical area and the optical bezel area; and a second transparent line on the electronic device, the second transparent line positioned in the optical area and the optical bezel area, wherein an anode electrode of the second light emitting element is electrically connected to one electrode of the second transistor through the first transparent line and a cathode electrode of the second light emitting element is electrically connected to the common electrode through the second transparent line.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority from Republic of Korea Patent Application No. 10-2024-0154937, filed on Nov. 5, 2024, which is hereby incorporated by reference in its entirety. BACKGROUND Field Embodiments of the disclosure relate to a display device. Description of Related Art With the development of technology, the display device may provide a capture function and various detection functions in addition to an image display function. To this end, the display device includes an optical electronic device (also referred to as a light receiving device or sensor), such as a camera and a detection sensor. Since the optical electronic device receives light from the front of the display device, it should be installed where light reception is easy. Accordingly, conventionally, the camera (camera lens) and the detection sensor had to be installed to be exposed on the front surface of the display device. Thus, the bezel of the display panel is widened or a notch or physical hole is formed in the display area of the display panel, and a camera or a detection sensor is installed there. When the display device includes an optical electronic device, an unexpected deterioration in image quality may occur according to the structure for incorporating the optical electronic device, necessitating the improvement of resolution, securing of transmission areas, and assurance of transmittance. SUMMARY Embodiments of the disclosure may provide a display device having a transmissive structure capable of normally receiving light by an electronic device without exposing the electronic device through the front surface of the display device. Embodiments of the disclosure may provide a display device having a structure capable of enhancing transmittance of an optical area by disposing light emitting elements in a transmittable optical area and pixel circuits for driving the light emitting elements in the optical area in an optical bezel area. Embodiments of the disclosure may provide a display device having a structure capable of enhancing transmittance of an optical area by connecting a light emitting element disposed in a transmittable optical area and pixel circuits disposed in an optical bezel area through a transparent line including a transparent conductive material. In one embodiment, a display device comprises: a display area including an optical area through which light is transmittable, an optical bezel area that at least partially surrounds the optical area in a plan view of the display device, and a normal area that at least partially surrounds the optical bezel area in the plan view; a substrate overlapping the optical bezel area and the normal area but does not overlap the optical area; an electronic device overlapping the optical area and partially overlapping the optical bezel area; a first transistor and a second transistor in the optical bezel area; a first light emitting element in the optical bezel area, the first light emitting element connected to the first transistor; and a second light emitting element in the optical area, the second light emitting element connected to the second transistor that is in the optical bezel area, wherein the first transistor, the second transistor, and the first light emitting element are on the substrate in the optical bezel area and the second light emitting element is on the electronic device in the optical area. In one embodiment, a display device comprises: an upper substrate including a first area and a second area that surrounds the first area in a plan view of the display device; a lower substrate including a third area and a fourth area that surrounds the third area in the plan view, the fourth area positioned under the first area; a first via hole and a second via hole in the first area of the upper substrate; a first transistor on the upper substrate; a second transistor on the upper substrate; a common electrode to which a cathode voltage is applied, the common electrode on the upper substrate; a first light emitting element on the upper substrate; a second light emitting element on the lower substrate; a first transparent line electrically connected to an anode electrode of the second light emitting element; a first conductive pattern in the first via hole, the first conductive pattern electrically connecting one electrode of the second transistor and the first transparent line; a second transparent line electrically connected to a cathode electrode of the second light emitting element; and a second conductive pattern in the second via hole, the second conductive pattern electrically connecting the common electrode and the second transparent line, wherein the first transparent line and the second transparent line include a first transparent conductive material. In one embodiment, a display device comprises: a display area including an optical area and an optical bezel area that surrounds the optical area in a plan view of the displa