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KR-20260063978-A - DISPLAY DEVICE

KR20260063978AKR 20260063978 AKR20260063978 AKR 20260063978AKR-20260063978-A

Abstract

Embodiments of the present disclosure relate to a display device, and more specifically, include a substrate, a bank, a first light-emitting layer disposed on a first pixel electrode, a second light-emitting layer disposed on a second pixel electrode, a common electrode disposed on the first light-emitting layer and the second light-emitting layer, an inorganic encapsulation layer disposed on the common electrode, a first photochromic layer disposed on the inorganic encapsulation layer and overlapping with the bank, an organic encapsulation layer disposed on the first photochromic layer, and a second photochromic layer disposed on the organic encapsulation layer and overlapping with the first photochromic layer, thereby enabling a widening of the viewing angle while reducing reflectance.

Inventors

  • 김지협
  • 김중기
  • 엄성용
  • 김도형
  • 이진숙
  • 김경희
  • 김현식

Assignees

  • 엘지디스플레이 주식회사

Dates

Publication Date
20260507
Application Date
20241031

Claims (19)

  1. Substrate; A first pixel electrode disposed on the above substrate; A second pixel electrode disposed on the substrate and spaced apart from the first pixel electrode; A bank disposed on the first pixel electrode and the second pixel electrode, overlapping with a portion of the first pixel electrode and a portion of the second pixel electrode respectively, and having an opening; A first light-emitting layer disposed on the first pixel electrode; A second light-emitting layer disposed on the second pixel electrode; A common electrode disposed on the first light-emitting layer and the second light-emitting layer; An inorganic encapsulation layer disposed on the above common electrode; A first discoloration layer disposed on the above-mentioned inorganic encapsulation layer and overlapping with the bank; An organic encapsulation layer disposed on the first discoloration layer; and A second discoloration layer disposed on the organic encapsulation layer and overlapping with the first discoloration layer. A display device including
  2. In paragraph 1, A first color filter disposed on the organic encapsulation layer and overlapping with the first light-emitting layer; and It further includes a second color filter disposed on the organic encapsulation layer and overlapping with the second light-emitting layer, A portion of the first color filter is located on a portion of the second color-changing layer, and A portion of the second color filter is located on a portion of the second color-changing layer, Display device.
  3. In paragraph 1, It further includes a touch electrode disposed on the above organic encapsulation layer, and The touch electrode has an opening that overlaps with the first light-emitting layer and the second light-emitting layer, respectively, and A display device in which the portion of the touch electrode excluding the opening overlaps with the first color-changing layer and the second color-changing layer.
  4. In paragraph 3, The above touch electrode further includes an insulating layer, and The above second discoloration layer is disposed on the insulating layer, a display device.
  5. In paragraph 1, A display device comprising an organic encapsulation layer having a single refractive index.
  6. In paragraph 1, A display device comprising a plurality of organic layers having different refractive indices, wherein the above organic encapsulation layer comprises a plurality of organic layers.
  7. In paragraph 6, The above plurality of organic layers are, A first organic layer having a first refractive index; and A display device comprising a second organic layer disposed on the first organic layer and having a second refractive index greater than the first refractive index.
  8. In paragraph 6, A display device in which the direction of travel of light emitted to the side from the light-emitting layer is bent to face the front direction.
  9. In paragraph 1, A display device in which the first color-changing layer and the second color-changing layer can change to a transparent color or black.
  10. In paragraph 1, A display device in which the first color-changing layer and the second color-changing layer turn black when exposed to ultraviolet rays.
  11. In paragraph 1, The first color-changing layer and the second color-changing layer are a display device that changes to a transparent color in a low-light environment.
  12. In paragraph 1, The above bank is a display device comprising a color-changing material.
  13. In Paragraph 12, The above bank turns black when exposed to ultraviolet light and becomes transparent in low-light environments, and A display device in which light directed toward the color-changing bank is reflected relatively less when the bank is black than when it is transparent.
  14. In paragraph 1, It further includes a black pixel defining layer disposed between the above-mentioned inorganic encapsulation layer and the above-mentioned first color-changing layer, and overlapping with the above-mentioned bank, and The above bank includes a transparent material, and Light incident on the black pixel defining layer is reflected less than when incident on the bank, and The first color-changing layer is a display device that overlaps with the black pixel definition layer.
  15. In paragraph 1, The above bank, the first discoloration layer, and the second discoloration layer are in the form of a matrix, and A display device in which the first discoloration layer and the second discoloration layer overlap with the bank in an area other than the opening of the bank.
  16. Substrate; A bank disposed on the above substrate and having an opening; A light-emitting layer disposed in the above-mentioned opening;; An inorganic encapsulation layer disposed on the above-mentioned light-emitting layer and the above-mentioned bank; A first discoloration layer disposed on the above-mentioned inorganic encapsulation layer and overlapping with the bank; and An organic encapsulation layer disposed on the first discoloration layer and comprising a plurality of organic layers having different refractive indices. A display device including
  17. In Paragraph 16, The above plurality of organic layers are, A first organic layer having a first refractive index; and A display device comprising a second organic layer disposed on the first organic layer and having a second refractive index greater than the first refractive index.
  18. In Paragraph 17, A display device in which the direction of propagation of light emitted from the light-emitting layer is bent toward the upper surface of the encapsulation layer.
  19. In Paragraph 16, The first color-changing layer is a display device that can change to a transparent color or black.

Description

Display Device The embodiments of the present disclosure relate to a display device. As the information society develops, the demand for display devices to display images is increasing in various forms, and recently, various display devices such as liquid crystal displays and organic light-emitting diodes (OLEDs) are being utilized. When a display panel is used outdoors, external light may be visible to the user, which can reduce the visibility of the display panel. If the viewing angle of the display panel is narrow, the image may not be visible to users on the side of the display panel. FIG. 1 is a system configuration diagram of a display device according to embodiments of the present disclosure. FIG. 2 is a drawing showing a display panel according to embodiments of the present disclosure. FIG. 3 is a cross-sectional view of a display panel according to embodiments of the present disclosure. FIGS. 4 and FIGS. 5 are cross-sectional views of a display panel according to embodiments of the present disclosure. FIG. 6 is a diagram showing a stacked structure of a color-changing bank, a color-changing pixel definition layer, and a second color-changing layer according to embodiments of the present disclosure. FIGS. 7 and FIGS. 8 are cross-sectional views of a display panel according to embodiments of the present disclosure. FIGS. 9 and FIGS. 10 are cross-sectional views of a sealing layer according to embodiments of the present disclosure. Hereinafter, some embodiments of the present disclosure will be described in detail with reference to the exemplary drawings. In assigning reference numerals to the components of each drawing, the same components may have the same reference numeral as much as possible, even if they are shown in different drawings. Furthermore, in describing the present disclosure, if it is determined that a detailed description of related known components or functions may obscure the essence of the present disclosure, such detailed description may be omitted. Where terms such as "comprising," "having," or "consisting of" are used in this specification, other parts may be added unless "only" is used. Where a component is expressed in the singular, it may include a plural unless there is a special explicit description otherwise. Additionally, terms such as first, second, A, B, (a), (b), etc., may be used to describe the components of the present disclosure. These terms are used merely to distinguish the components from other components, and the nature, order, sequence, or number of the components are not limited by such terms. In describing the positional relationship of components, where it is stated that two or more components are "connected," "combined," or "joined," it should be understood that while the two or more components may be directly "connected," "combined," or "joined," they may also be "connected," "combined," or "joined" with other components "intervened." Here, the other components may be included in one or more of the two or more components that are "connected," "combined," or "joined" with one another. In describing the temporal flow relationship regarding components, methods of operation, or methods of production, for example, when the temporal or sequential relationship is described using "after," "following," "next," or "before," it may include cases where the relationship is not continuous unless "immediately" or "directly" is used. Meanwhile, where numerical values or corresponding information regarding a component (e.g., levels, etc.) are mentioned, even without separate explicit notation, the numerical values or corresponding information may be interpreted as including a range of error that may occur due to various factors (e.g., process factors, internal or external shocks, noise, etc.). Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the attached drawings. FIG. 1 is a system configuration diagram of a display device according to embodiments of the present disclosure. Referring to FIG. 1, a display device (100) according to embodiments of the present disclosure may include a display panel (110) and a display driving circuit as components for displaying an image. The display driving circuit may be a circuit for driving the display panel (110). The display driving circuit may include a data driving circuit (120), a gate driving circuit (130), and a controller (140), but embodiments of the present disclosure are not limited thereto. The display panel (110) may include a substrate (111) and a plurality of subpixels (SP) disposed on the substrate (111). The substrate (111) may include a display area (DA) capable of displaying an image and a non-display area (NDA) located at the outer edge of the display area (DA). A plurality of subpixels (SP) for displaying an image may be arranged in the display area (DA). The non-display area (NDA) may include a pad area (PA) located in a column direction from the display area (