US-12626625-B2 - Transparent display device

US12626625B2US 12626625 B2US12626625 B2US 12626625B2US-12626625-B2

Abstract

A transparent display device is disclosed, which may reduce a yellowish phenomenon in a non-display area. The transparent display device comprises a substrate provided with a display area in which a plurality of subpixels are disposed, and a non-display area adjacent to the display area, a gate driver provided in the non-display area over the substrate, including a plurality of stages, a metal line provided between the gate driver and the display area, and a trench provided between the metal line and the display area.

Inventors

Soyi Lee
Changsoo Kim
Euitae Kim
KiSeob SHIN

Assignees

LG DISPLAY CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20241127
Priority Date: 20191230

Claims (16)

1 . A display device, comprising: a substrate having a display area and a non-display area adjacent to the display area, the display area including a first transmissive area; a plurality of subpixels disposed in the display area; a gate driver located in the non-display area of the substrate, the gate driver including a plurality of stages; a dam located in the non-display area of the substrate; a trench provided between the dam and the display area; a first insulating layer located on an upper portion of the trench, wherein the first insulating layer includes no overlapping area with the dam; and a plurality of conductive lines extending from the gate driver provided in the non-display area, wherein the plurality of conductive lines is provided below the trench and the first insulating layer.
2 . The display device of claim 1 , further including a second insulating layer provided over the plurality of conductive lines, wherein the trench passes through the second insulating layer.
3 . The display device of claim 2 , wherein the first insulating layer is provided over the second insulating layer and overlays at least one side of the second insulating layer in the trench.
4 . The display device of claim 1 , further comprising anode electrodes respectively provided in the plurality of subpixels and a bank provided between the anode electrodes, wherein the first insulating layer includes substantially the same material as that of the bank on the same layer as the bank.
5 . The display device of claim 2 , wherein the first insulating layer includes a first open area, and the second insulating layer includes a second open area having a width narrower than that of the first open area.
6 . The display device of claim 1 , further comprising a cathode electrode provided in the plurality of subpixels, wherein the cathode electrode is provided over the first insulating layer in the non-display area.
7 . The display device of claim 6 , wherein the cathode electrode is overlapping with at least one of the plurality of conductive lines.
8 . The display device of claim 1 , wherein the dam is provided between an end of the substrate and the gate driver.
9 . The display device of claim 1 , further comprising an encapsulation film on the first insulating layer.
10 . The display device of claim 1 , wherein the first insulating layer is provided with ends formed between one of the plurality of conductive lines and the trench.
11 . The display device of claim 1 , further comprising a signal output line extended from the gate driver to the display area, wherein the signal output line is located below at least one of the plurality of conductive lines.
12 . The display device of claim 11 , wherein the signal output line includes a first layer located between the gate driver and the trench, a second layer located between the trench and the display area, and a contact hole electrically connecting the first layer with the second layer.
13 . The display device of claim 1 , wherein the display area further includes first non-transmissive areas having at least one pixel of the plurality of subpixels, and the non-display area includes a second non-transmissive area located in the plurality of stages and a second transmissive area located among the plurality of stages, and wherein the first transmissive area is located between the first non-transmissive areas.
14 . The display device of claim 13 , wherein the non-display area further includes third non-transmissive areas having pixel power lines and common power lines for supplying power to the plurality of subpixels, and third transmissive areas located between the third non-transmissive areas.
15 . The display device of claim 1 , wherein the plurality of conductive lines includes a lighting test line configured for testing whether a defect exists in one or more of a plurality of signal lines on the substrate.
16 . The display device of claim 15 , wherein the lighting test line is electrically connected with a lighting test transistor located in the non-display area.

Description

CROSS REFERENCE TO RELATED APPLICATION This application is a continuation of U.S. patent application Ser. No. 18/057,088 filed Nov. 18, 2022; which is a continuation of U.S. patent application Ser. No. 17/132,676, filed Dec. 23, 2020; which claims the benefit of Korean Patent Application No. 10-2019-0177869, filed Dec. 30, 2019, which is hereby incorporated by reference as if fully set forth herein. BACKGROUND Technical Field The present disclosure relates to a transparent display device. Description of the Related Art With advancement in information-oriented societies, demands for display devices that display an image have increased in various forms. Recently, various types of display devices such as a liquid crystal display (LCD) device, a plasma display panel (PDP) device, and an organic light emitting display (OLED) device, a quantum dot light emitting display (QLED) device have been widely utilized. Recent, studies for transparent display devices for allowing a user to look at objects or image arranged on an opposite side of a display device after transmitting the display device are actively ongoing. A transparent display device includes a display area on which an image is displayed, and a non-display area, wherein the display area may include a transmissive area that may transmit external light, and a non-transmissive area. The transparent display device may have high light transmittance in the display area through the transmissive area. BRIEF SUMMARY The inventors of the present disclosure have recognized that the transparent display device has lower light transmittance in the non-display area than the display area as a plurality of signal lines are disposed in the non-display area. The inventors further recognized and appreciated that a yellowish phenomenon occurs in the transparent display device due to material characteristics of an insulating film provided in the non-display area, whereby light transmittance may be more lowered. The present disclosure has been made in view of the one or more problems in the related are including the above problems. Accordingly, one or more embodiments of the present disclosure provides a transparent display device that may have high light transmittance in a non-display area as well as a display area. One or more embodiments of the present disclosure provides a transparent display device that may reduce a yellowish phenomenon in a non-display area. In addition to the technical benefits of the present disclosure as mentioned above, additional benefits and features of the present disclosure will be clearly understood by those skilled in the art from the following description of the present disclosure. In accordance with an aspect of the present disclosure, the above and other benefits can be accomplished by the provision of a transparent display device comprising a substrate provided with a display area in which a plurality of subpixels are disposed, and a non-display area adjacent to the display area, a gate driver provided in the non-display area on the substrate, including a plurality of stages, a metal line provided between the gate driver and the display area, and a trench provided between the metal line and the display area. In accordance with another aspect of the present disclosure, the above and other benefits can be accomplished by the provision of a transparent display device comprising a substrate provided with a display area in which a plurality of subpixels are disposed, and a non-display area adjacent to the display area, a plurality of metal lines provided in the non-display area over the substrate, and at least one insulating film provided over the plurality of metal lines and provided with an open area formed between one of the metal lines and the display area. According to the present invention, the transmissive area is provided in the non-display area provided with the gate driver, whereby transmittance in the non-display area may be improved. Also, according to the present disclosure, a bank is not formed over the gate driver, whereby a yellowish phenomenon may be prevented from occurring due to material characteristics of the bank. Also, according to the present disclosure, the trench is provided between the gate driver and the display area, whereby oxygen or water which is externally permeated may be prevented from being propagated through organic films. In addition to the effects of the present disclosure as mentioned above, additional advantages and features of the present disclosure will be clearly understood by those skilled in the art from the above description of the present disclosure. BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS The above and other features and other advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. 1 is a perspective view illustrating a transparent display device according to one emb