US-12628478-B2 - Display device

US12628478B2US 12628478 B2US12628478 B2US 12628478B2US-12628478-B2

Abstract

A display device is provided. The display device includes a substrate including a display area and a non-display area, an insulating layer above the substrate, and in the display area and the non-display area, and at least one dam in the non-display area, surrounding the display area, and including a lower dam layer above the substrate, an intermediate dam layer above the lower dam layer, and an upper dam layer covering the lower dam layer and the intermediate dam layer, wherein the insulating layer is between the intermediate dam layer and the upper dam layer.

Inventors

Jin Woo Lee
Zu Seok OH
Jeong Hyun Lee
Kyung Ah CHOI

Assignees

SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20221111
Priority Date: 20220225

Claims (18)

1 . A display device comprising: a substrate comprising a display area and a non-display area; an insulating layer above the substrate, and in the display area and the non-display area; and at least one dam in the non-display area, surrounding the display area, and comprising: a lower dam layer above the substrate; an intermediate dam layer above the lower dam layer; and an upper dam layer covering the lower dam layer and the intermediate dam layer, wherein the insulating layer is between the intermediate dam layer and the upper dam layer, and wherein the insulating layer covers the lower dam layer and the intermediate dam layer, and contacts the lower dam layer and the intermediate dam layer.
2 . The display device of claim 1 , wherein the upper dam layer contacts a top surface of the insulating layer.
3 . The display device of claim 1 , wherein the intermediate dam layer contacts a top surface of the lower dam layer, and wherein a width of the lower dam layer is greater than a width of the intermediate dam layer.
4 . The display device of claim 1 , wherein a width of the upper dam layer is greater than a width of the lower dam layer and is greater than a width of the intermediate dam layer.
5 . The display device of claim 1 , further comprising a via layer between the substrate and the insulating layer, and defining a hole portion.
6 . The display device of claim 5 , wherein the hole portion is between the at least one dam and the display area, and surrounds the display area in plan view.
7 . The display device of claim 5 , wherein the insulating layer is above the via layer, and wherein a portion of the insulating layer is in the hole portion.
8 . The display device of claim 1 , wherein the display area comprises pixels comprising sub-pixels, the sub-pixels comprising: a first bank pattern and a second bank pattern spaced apart from each other; a first electrode overlapping the first bank pattern; a second electrode overlapping the second bank pattern; a light emitting element above the first electrode and the second electrode; a first connection electrode contacting one end of the light emitting element; a second connection electrode contacting another end of the light emitting element; a bank layer partitioning the sub-pixels; and an upper bank layer above the bank layer.
9 . The display device of claim 8 , wherein the lower dam layer comprises a same material as the first bank pattern and the second bank pattern, wherein the intermediate dam layer comprises a same material as the bank layer, and wherein the upper dam layer comprises a same material as the upper bank layer.
10 . The display device of claim 8 , wherein the insulating layer covers the first electrode, the second electrode, the first bank pattern, the second bank pattern, and the bank layer, and extends to the non-display area.
11 . A display device comprising: a substrate comprising a display area and a non-display area; a via layer above the substrate and including an organic material; an insulating layer above the via layer, and in the display area and the non-display area; and at least one dam in the non-display area, and surrounding the display area, wherein the insulating layer defines vent holes penetrating the insulating layer in the non-display area, overlapping the at least one dam, exposing the via layer, and spaced apart along a perimeter of the display area.
12 . The display device of claim 11 , wherein the vent holes are spaced apart from each other to surround the display area, and expose a top surface of the via layer.
13 . The display device of claim 12 , wherein the at least one dam covers the vent holes, and wherein a width of the at least one dam is greater than a diameter of one of the vent holes.
14 . The display device of claim 12 , wherein the at least one dam contacts a top surface and a side surface of the insulating layer in which the vent holes are formed, and contacts the top surface of the via layer exposed by the vent holes.
15 . An electronic device comprising: a substrate comprising a display area comprising sub-pixels, and a non-display area comprising dummy pixels; a bank layer above the substrate, and configured to partition the sub-pixels and the dummy pixels; an upper bank layer above the bank layer, and overlapping the bank layer; and at least two insulating layers between the bank layer and the upper bank layer, covering the bank layer, and continuously extending from the display area to the non-display area, wherein the dummy pixels surround the display area, wherein the bank layer is in a grid pattern, in plan view, and wherein the upper bank layer is in a grid pattern in plan view.
16 . The electronic device of claim 15 , wherein the bank layer and the upper bank layer continuously extend from the display area to the non-display area.
17 . The electronic device of claim 15 , further comprising: a color control layer above the sub-pixels; a first capping layer above the color control layer; a low refractive index layer above the first capping layer; a second capping layer above the low refractive index layer; and a planarization layer above the second capping layer, wherein the first capping layer, the low refractive index layer, the second capping layer, and the planarization layer extend from the display area to the non-display area above the dummy pixels.
18 . The electronic device of claim 17 , wherein the first capping layer, the second capping layer, and the planarization layer cover the bank layer and the upper bank layer in the non-display area.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to, and the benefit of, Korean Patent Application No. 10-2022-0025160 filed on Feb. 25, 2022 in the Korean Intellectual Property Office, the contents of which are herein incorporated by reference in their entirety. BACKGROUND 1. Field The present disclosure relates to a display device. 2. Description of the Related Art The importance of display devices has steadily increased with the development of multimedia technology. In response thereto, various types of display devices, such as an organic light emitting display (OLED), a liquid crystal display (LCD) and the like have been used. A display device is a device for displaying an image, and includes a display panel, such as an organic light emitting display panel or a liquid crystal display panel. The light emitting display panel may include light emitting elements, e.g., light emitting diodes (LED), and examples of the light emitting diode include an organic light emitting diode (OLED) using an organic material as a light emitting material, and an inorganic light emitting diode using an inorganic material as a light emitting material. SUMMARY Aspects of the present disclosure provide a display device capable of reducing peeling-off of a dam and reducing or preventing the likelihood of an organic material overflowing to an outer portion of a substrate during a process. However, aspects of the present disclosure are not restricted to the one set forth herein. The above and other aspects of the present disclosure will become more apparent to one of ordinary skill in the art to which the present disclosure pertains by referencing the detailed description of the present disclosure given below. According to one or more embodiments of the disclosure, a display device includes a substrate including a display area and a non-display area, an insulating layer above the substrate, and in the display area and the non-display area, and at least one dam in the non-display area, surrounding the display area, and including a lower dam layer above the substrate, an intermediate dam layer above the lower dam layer, and an upper dam layer covering the lower dam layer and the intermediate dam layer, wherein the insulating layer is between the intermediate dam layer and the upper dam layer. The insulating layer may cover the lower dam layer and the intermediate dam layer, and contacts the lower dam layer and the intermediate dam layer. The upper dam layer may contact a top surface of the insulating layer. The intermediate dam layer may contact a top surface of the lower dam layer, wherein a width of the lower dam layer is greater than a width of the intermediate dam layer. A width of the upper dam layer may be greater than a width of the lower dam layer and may be greater than a width of the intermediate dam layer. The display device may further include a via layer between the substrate and the insulating layer, and defining a hole portion. The hole portion may be between the at least one dam and the display area, and may surround the display area in plan view. The insulating layer may be above the via layer, wherein a portion of the insulating layer is in the hole portion. The display area may include pixels including sub-pixels, the sub-pixels including a first bank pattern and a second bank pattern spaced apart from each other, a first electrode overlapping the first bank pattern, a second electrode overlapping the second bank pattern, a light emitting element above the first electrode and the second electrode, a first connection electrode contacting one end of the light emitting element, a second connection electrode contacting another end of the light emitting element, a bank layer partitioning the sub-pixels, and an upper bank layer above the bank layer. The lower dam layer may include a same material as the first bank pattern and the second bank pattern, wherein the intermediate dam layer includes a same material as the bank layer, and wherein the upper dam layer includes a same material as the upper bank layer. The insulating layer may cover the first electrode, the second electrode, the first bank pattern, the second bank pattern, and the bank layer, and extends to the non-display area. According to one or more embodiments of the disclosure, a display device includes a substrate including a display area and a non-display area, a via layer above the substrate, an insulating layer above the via layer, and in the display area and the non-display area, and at least one dam in the non-display area, and surrounding the display area, wherein the insulating layer defines vent holes penetrating the insulating layer in the non-display area, and wherein the at least one dam overlaps the vent holes. The vent holes may be spaced apart from each other to surround the display area, and expose a top surface of the via layer. The at least one dam may cover the vent holes, wherein a width of the at least one dam is g