KR-20260062921-A - DISPLAY DEVICE

KR20260062921AKR 20260062921 AKR20260062921 AKR 20260062921AKR-20260062921-A

Abstract

The present disclosure relates to a display device, wherein a display device according to one embodiment comprises a substrate, a transistor located on the substrate, a pixel electrode connected to the transistor, a bank layer including a pixel opening located on the pixel electrode and overlapping with the pixel electrode, a light-emitting layer located within the pixel opening, a common electrode located on the light-emitting layer and the bank layer, an encapsulation layer located on the common electrode, a sensing electrode located on the encapsulation layer, a first insulating layer located on the encapsulation layer and overlapping with the pixel opening, a second insulating layer located on the first insulating layer, and a third insulating layer surrounding the first insulating layer, wherein the refractive indices of the first insulating layer, the second insulating layer, and the third insulating layer are different, and the refractive index of the first insulating layer is higher than the refractive index of the third insulating layer.

Inventors

변진수
홍종범
김웅식
최정민

Assignees

삼성디스플레이 주식회사

Dates

Publication Date: 20260507
Application Date: 20260427

Claims (11)

substrate, A transistor located on the above substrate, A pixel electrode connected to the above transistor, A bank layer including a pixel opening located on the pixel electrode and overlapping with the pixel electrode, A light-emitting layer located within the pixel opening, A common electrode located on the light-emitting layer and the bank layer, Encapsulation layer located on the above common electrode, A sensing electrode located on the above-mentioned encapsulation layer, A first insulating layer located on the above-mentioned encapsulation layer and overlapping with the pixel opening, A second insulating layer located on the first insulating layer, and It includes a third insulating layer surrounding the first insulating layer on the above-mentioned encapsulation layer, and The refractive indices of the first insulating layer, the second insulating layer, and the third insulating layer are different, and The refractive index of the first insulating layer is higher than the refractive index of the third insulating layer, and The refractive index of the second insulating layer is lower than the refractive index of the first insulating layer and higher than the refractive index of the third insulating layer, The third insulating layer includes an opening that overlaps with the pixel opening, and the first insulating layer is located within the opening of the third insulating layer. The opening of the third insulating layer is larger than the pixel opening, and in a planar view, the pixel opening is located within the opening, and The second insulating layer covers the first insulating layer and the third insulating layer, and A display device in which the thickness of the third insulating layer is thicker than the thickness of the first insulating layer.
In paragraph 1, The width of the opening of the third insulating layer is the same as the width of the first insulating layer, and A display device in which the end of the first insulating layer contacts the end of the third insulating layer.
In paragraph 1, The width of the opening of the third insulating layer is greater than the width of the first insulating layer, and The first insulating layer is a display device spaced apart from the third insulating layer.
In paragraph 1, The width of the opening of the third insulating layer is smaller than the width of the first insulating layer, and The above third insulating layer is a display device covering the side of the above first insulating layer.
In paragraph 1, The above sensing electrode is a display device covered by the above third insulating layer.
In paragraph 5, A sensing electrode connection part connected to the above sensing electrode, and A display device further comprising a sensing insulating layer located between the sensing electrode and the sensing electrode connection portion.
In paragraph 1, The above sensing electrode is a display device located on the third insulating layer.
In Paragraph 7, It further includes a sensing electrode connection part connected to the above sensing electrode, and The third insulating layer is a display device located between the sensing electrode and the sensing electrode connection part.
In paragraph 1, A display device in which the difference between the refractive index of the first insulating layer and the refractive index of the second insulating layer is 0.01 or more and 0.67 or less.
In Paragraph 9, A display device in which the difference between the refractive index of the second insulating layer and the refractive index of the third insulating layer is 0.01 or more and 0.67 or less.
In Paragraph 10, The difference between the refractive index of the first insulating layer and the refractive index of the second insulating layer is 0.05 or greater, and A display device in which the difference between the refractive index of the second insulating layer and the refractive index of the third insulating layer is 0.05 or greater.

Description

Display Device The present disclosure relates to a display device. A display device is a device that displays an image, and includes Liquid Crystal Displays (LCDs) and Organic Light Emitting Diodes (OLEDs). These display devices are used in a wide variety of electronic devices, such as mobile phones, navigation systems, digital cameras, e-books, portable game consoles, and various terminals. A display device is composed of a multilayer structure. For example, a display device may be composed of a multilayer structure in which light-emitting elements, touch sensors, etc., are stacked on a substrate. Light generated from the light-emitting elements passes through these various layers and is emitted to the outside of the display device, thereby enabling the display of an image. However, some of the light generated from the light-emitting elements may be lost without being emitted to the outside, such as by being reflected at the interlayer interface. This results in a problem where the front light emission efficiency and display quality of the display device are degraded. FIG. 1 is a schematic plan view of a display device according to one embodiment. FIG. 2 is a plan view of a portion including a sensing unit in a display device according to one embodiment. FIG. 3 is a plan view showing a part of a display device according to one embodiment. FIG. 4 is a cross-sectional view showing a part of a display device according to one embodiment. FIG. 5 is a diagram showing the path of light generated from a light-emitting element of a display device according to one embodiment. FIG. 6 is a cross-sectional view showing a display device according to a reference example. FIG. 7 is a cross-sectional view showing a part of a display device according to one embodiment. FIG. 8 is a cross-sectional view showing a part of a display device according to one embodiment. FIG. 9 is a cross-sectional view showing a part of a display device according to one embodiment. FIG. 10 is a cross-sectional view showing a part of a display device according to one embodiment. FIG. 11 is a diagram showing the path of light generated from a light-emitting element of a display device according to one embodiment. FIG. 12 is a cross-sectional view showing a part of a display device according to one embodiment. Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification. Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings. Furthermore, when it is said that a part, such as a layer, membrane, region, or plate, is "on" or "on" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when it is said that a part is "directly above" another part, it means that there is no other part in between. Also, saying that a part is "on" or "on" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "on" or "on" in the direction opposite to gravity. Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Additionally, throughout the specification, "planar" means when the subject part is viewed from above, and "cross-sectional" means when the cross-section obtained by vertically cutting the subject part is viewed from the side. A display device according to one embodiment is described below with reference to FIGS. 1 and FIG. 2. FIG. 1 is a schematic plan view of a display device according to one embodiment, and FIG. 2 is a plan view of a portion including a sensing unit in a display device according to one embodiment. As illustrated in FIG. 1, a display device according to one embodiment includes a substrate (100) and a pad portion (30). The substrate (100) includes a display area (DA) and a non-display area (NA). The display area (DA) is an area where pixels including light-emitting diodes and transistors are formed to display an image, and the non-display area (NA) is an area where an i