CN-122028623-A - Display apparatus including light emitting device and pixel lens

Abstract

The present disclosure provides a display apparatus including a light emitting device and a pixel lens. The light emitting device may be covered with an optical insulation layer. The lens planarization layer may be disposed on the optical insulation layer. The pixel lens may be disposed between the optical insulation layer and the lens planarization layer. The pixel lens may be surrounded by a lens passivation layer. The lens passivation layer may block oxygen and moisture moving toward the pixel lens. Accordingly, in the display device, degradation of the quality of an image provided to a user due to oxygen and/or moisture can be reduced or prevented.

Inventors

• Song Mingken
• JIN SHENGJI
• LI SHOUZHENG
• LI ZHIEN

Assignees

• 乐金显示有限公司

Dates

Publication Date

20260512

Application Date

20250918

Priority Date

20241112

Claims (20)

1. 1. A display device, the display device comprising: A light emitting device on an emission region of the device substrate; An optical insulating layer on the light emitting device, the optical insulating layer extending beyond the emission region; a lens passivation layer including a lower passivation layer on the optical insulating layer and an upper passivation layer on the lower passivation layer; a pixel lens between the lower passivation layer and the upper passivation layer of the lens passivation layer, the pixel lens overlapping the emission region, and A lens planarization layer on the upper passivation layer of the lens passivation layer, the lens planarization layer including a region overlapping the emission region, Wherein the oxygen transmittance OTR of the lens passivation layer is less than the OTR of the optical insulation layer and the OTR of the lens planarization layer.
2. 2. The display device of claim 1, wherein the lens passivation layer has a water vapor transmission rate WVTR that is less than the WVTR of the optical insulating layer and the lens planarization layer.
3. 3. The display device of claim 1, wherein a portion of the upper passivation layer is in contact with a portion of the lower passivation layer at a location between the lower passivation layer and the upper passivation layer where the pixel lens is absent.
4. 4. The display device of claim 1, wherein the upper passivation layer comprises a material different from a material of the lower passivation layer.
5. 5. The display device of claim 1, wherein the refractive index of the pixel lens is less than the refractive index of the upper passivation layer, Wherein the refractive index of the lens planarization layer is smaller than the refractive index of the pixel lens, and Wherein the thickness of the upper passivation layer is less than the thickness of the lens planarization layer.
6. 6. The display device of claim 5, wherein a thickness of the upper passivation layer is less than a thickness of the lower passivation layer.
7. 7. The display device of claim 1, the display device further comprising: an ultraviolet light UV absorber dispersed in the optical insulation layer, Wherein the optical insulating layer includes a lower end portion provided on the light emitting device, a central portion provided on the lower end portion and further away from the light emitting device than the lower end portion, and a surface layer portion provided on the central portion such that the central portion is located between the lower end portion and the surface layer portion, Wherein the surface layer portion of the optical insulating layer includes an upper surface of the optical insulating layer facing the lens passivation layer, and Wherein the content of the UV absorber in the surface layer portion of the optical insulation layer is greater than the content of the UV absorber in the central portion of the optical insulation layer.
8. 8. The display apparatus according to claim 7, wherein a content of the UV absorber in the lower end portion of the optical insulating layer is greater than the content of the UV absorber in the central portion of the optical insulating layer, and Wherein the thickness of the surface layer portion is smaller than the thickness of the lower end portion and the thickness of the central portion.
9. 9. A display device, the display device comprising: A first light emitting device on a first emission area of the device substrate; A second light emitting device located on a second emission region of the device substrate; an optical insulating layer on the first and second light emitting devices; a first pixel lens on the optical insulation layer, the first pixel lens overlapping the first emission region; A first lens passivation layer on the optical insulating layer, the first lens passivation layer surrounding the first pixel lens; A second pixel lens on the optical insulation layer, the second pixel lens overlapping the second emission region; a second lens passivation layer on the optical insulating layer, the second lens passivation layer surrounding the second pixel lens, and A lens planarization layer is provided on the surface of the lens, the lens planarization layer is positioned on the first lens passivation layer and the second lens passivation layer, the lens planarization layer overlaps the first and second emission regions, Wherein the water vapor transmittance WVTR of the first and second lens passivation layers is less than the WVTR of the optical insulating layer and the WVTR of the lens planarization layer.
10. 10. The display device of claim 9, wherein the second lens passivation layer has a same stack structure as the stack structure of the first lens passivation layer.
11. 11. The display device of claim 9, wherein the second lens passivation layer is spaced apart from the first lens passivation layer at a location between the first and second emission regions.
12. 12. The display device of claim 11, wherein each of the first and second lens passivation layers has a stacked structure including a lower passivation layer and an upper passivation layer on the lower passivation layer, and Wherein an end of the lower passivation layer is covered by the upper passivation layer.
13. 13. The display device of claim 11, the display device further comprising: an upper barrier pattern that does not overlap the first and second emission regions, the upper barrier pattern being located between the optical insulation layer and the lens planarization layer, Wherein an end portion of the first lens passivation layer and an end portion of the second lens passivation layer overlap the upper barrier pattern.
14. 14. The display device of claim 13, wherein the lens planarization layer is in contact with the upper barrier pattern at a location between the first and second lens passivation layers.
15. 15. The display device of claim 9, the display device further comprising: an antioxidant dispersed in the optical insulating layer and the lens planarizing layer.
16. 16. A display device, the display device comprising: A substrate including an emission region; A thin film transistor on the substrate; A light emitting device connected to the thin film transistor, the light emitting device being located in the emission region; A first lens passivation layer over the light emitting device; A pixel lens on the first lens passivation layer and overlapping the light emitting device in the emission region, the pixel lens having a curved upper surface, and A second lens passivation layer covering the curved upper surface of the pixel lens, the second lens passivation layer having an upper surface and a lower surface, each of the upper surface and the lower surface having a curved shape corresponding to the curved upper surface of the pixel lens, Wherein movement of oxygen and/or moisture included in the pixel lens surrounded by the first lens passivation layer and the second lens passivation layer is blocked.
17. 17. The display device of claim 16, the display device further comprising: An optical insulating layer between the light emitting device and the first lens passivation layer, and A lens planarization layer on the second lens passivation layer, Wherein the oxygen transmittance OTR of the first lens passivation layer and the second lens passivation layer is less than the OTR of the optical insulation layer and the OTR of the lens planarization layer.
18. 18. The display device of claim 16, the display device further comprising: An optical insulating layer between the light emitting device and the first lens passivation layer, and A lens planarization layer on the second lens passivation layer, Wherein the water vapor transmittance WVTR of the first and second lens passivation layers is less than the WVTR of the optical insulating layer and the WVTR of the lens planarization layer.
19. 19. The display device of claim 16, wherein the lower surface of the second lens passivation layer is in direct contact with the curved upper surface of the pixel lens.
20. 20. The display device of claim 16, wherein the first lens passivation layer is in direct contact with a lower surface of the pixel lens.

Description

Display apparatus including light emitting device and pixel lens Technical Field The present disclosure relates to an apparatus, and more particularly, for example, but not limited to, a display apparatus in which a light emitting device and a pixel lens are stacked on each emission region. Background Generally, a display device provides an image to a user. For example, the display device may comprise a light emitting arrangement. Each light emitting device may emit light exhibiting a specific color. For example, each light emitting device may include a light emitting unit disposed between a first electrode and a second electrode. The light emitted from each light emitting device may be focused by one of the pixel lenses. For example, each pixel lens may overlap one light emitting device. The pixel lens may be disposed between an optical insulation layer disposed on the light emitting device and a lens planarization layer disposed on the optical insulation layer. Therefore, in the display apparatus, the optical path length of light emitted from each light emitting device can be sufficiently fixed by the optical insulating layer. Also, in the display device, deformation of the pixel lens due to external impact may be reduced or prevented by the lens planarization layer. The description provided in the discussion of the background section should not be assumed to be prior art merely because it is referred to in or associated with that section. The discussion of the background section may include information describing one or more aspects of the subject technology, and the description in this section is not intended to limit the present disclosure. Disclosure of Invention Accordingly, the present disclosure is directed to a display device that substantially obviates one or more problems due to limitations and disadvantages of the related art. An object of the present disclosure is to provide a display device capable of preventing or at least reducing degradation of quality of an image provided to a user. It is another object of the present disclosure to provide a display device capable of preventing or at least reducing denaturation of pixel lenses due to oxygen and/or moisture. Additional advantages, objects, and features of the disclosure will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the disclosure. The objectives and other advantages of the disclosure may be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings. To achieve these objects and other advantages and in accordance with the purpose of the disclosure, as embodied and broadly described herein, there is provided a display apparatus including a light emitting device on an emission region of a device substrate, an optical insulation layer on the light emitting device, the optical insulation layer extending beyond the emission region, a lens passivation layer including a lower passivation layer on the optical insulation layer and an upper passivation layer on the lower passivation layer, a pixel lens between the lower passivation layer and the upper passivation layer of the lens passivation layer, the pixel lens overlapping the emission region, and a lens planarization layer on the upper passivation layer of the lens passivation layer, the lens planarization layer including an area overlapping the emission region, wherein an Oxygen Transmission Rate (OTR) of the lens passivation layer is less than the OTR of the optical insulation layer and the OTR of the lens planarization layer. In one embodiment, a display apparatus includes a first light emitting device on a first emission region of a device substrate, a second light emitting device on a second emission region of the device substrate, an optical insulating layer on the first and second light emitting devices, a first pixel lens on the optical insulating layer overlapping the first emission region, a first lens passivation layer on the optical insulating layer surrounding the first pixel lens, a second pixel lens on the optical insulating layer overlapping the second emission region, a second lens passivation layer on the optical insulating layer surrounding the second pixel lens, and a lens planarization layer on the first and second lens passivation layers overlapping the first and second emission regions, wherein a water Vapor Transmission Rate (VTR) of the first and second lens overlapping passivation layers is less than a WVTR of the optical insulating layer. In one embodiment, a display apparatus includes a substrate including an emission region, a thin film transistor on the substrate, a light emitting device connected to the thin film transistor, the light emitting device being located in the emission region, a first lens passivation layer located abo