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KR-102964174-B1 - DISPLAY DEVICE

KR102964174B1KR 102964174 B1KR102964174 B1KR 102964174B1KR-102964174-B1

Abstract

A display device according to one embodiment comprises: a substrate; a partition wall disposed on the substrate; a light-emitting element disposed on the substrate in a light-emitting region partitioned by the partition wall and extending in the thickness direction of the substrate; a light-converting layer disposed on the light-emitting element in the light-emitting region and converting the wavelength of light emitted from the light-emitting element or transmitting the light; and an optical member disposed on the partition wall and the light-converting layer, wherein the optical member comprises an optical pattern disposed on the partition wall and an optical layer disposed on the light-converting layer, and wherein the refractive index of the optical layer and the refractive index of the optical pattern are different from each other.

Inventors

  • 서기성
  • 박성국
  • 전형일
  • 최병화

Assignees

  • 삼성디스플레이 주식회사

Dates

Publication Date
20260513
Application Date
20210429

Claims (20)

  1. Substrate; A partition wall disposed on the above substrate; A light-emitting element disposed in a light-emitting region partitioned by the partition wall on the substrate and extending in the thickness direction of the substrate; A light conversion layer disposed on the light-emitting element in the light-emitting region, which converts the wavelength of light emitted from the light-emitting element or transmits the light; and It includes an optical member disposed on the above partition and the above light conversion layer, The optical member comprises an optical pattern disposed on the partition wall and an optical layer disposed on the light conversion layer, wherein A display device in which the refractive index of the optical layer and the refractive index of the optical pattern are different from each other.
  2. In Article 1, A display device in which the refractive index of the optical layer is greater than the refractive index of the optical pattern.
  3. In Article 2, The optical layer is a display device further disposed on the partition wall.
  4. In Paragraph 3, The above optical layer is a display device that overlaps the above optical pattern.
  5. In Paragraph 4, A display device that completely overlaps the optical pattern with the optical layer.
  6. In Paragraph 4, A display device further comprising a color filter disposed on the optical member.
  7. In Paragraph 4, A display device further comprising a capping layer disposed between the light conversion layer and the optical layer, wherein the capping layer comprises an inorganic material.
  8. In Article 7, The capping layer is a display device disposed between the light conversion layer and the optical layer and between the partition and the optical pattern.
  9. In Article 2, The above optical pattern is a display device having a line shape extended along one direction.
  10. In Article 1, A display device further comprising a light scattering layer disposed between the light conversion layer and the light-emitting element in the light-emitting region, wherein the light scattering layer comprises scattering particles.
  11. In Article 10, A display device in which the light scattering layer and the light conversion layer are in direct contact.
  12. A first light-emitting region that emits a first light, a second light-emitting region that emits a second light, and a third light-emitting region that emits a third light, disposed in a display area of a substrate; A partition wall dividing the first light-emitting region, the second light-emitting region, and the third light-emitting region; and A light-emitting element disposed apart from the partition wall in each of the first light-emitting region, the second light-emitting region, and the third light-emitting region, and extending in the thickness direction of the substrate; A light conversion layer disposed on the light-emitting element in the light-emitting region, which converts the wavelength of light emitted from the light-emitting element or transmits the light; and It includes an optical member disposed on the above partition and the above light conversion layer, The optical member comprises an optical pattern disposed on the partition wall and an optical layer disposed on the light conversion layer, wherein A display device in which the refractive index of the optical layer is greater than the refractive index of the optical pattern.
  13. In Article 12, The light conversion layer is located in the first light-emitting region and is a light-transmitting layer that transmits the light, A first wavelength conversion layer located in the second light-emitting region and converting a portion of the first light into second light, and A display device comprising a second wavelength conversion layer located in the third light-emitting region and converting a portion of the first light into third light.
  14. In Article 12, It further includes a light scattering layer disposed between the light conversion layer and the light-emitting element in the above-mentioned light-emitting region, The above light scattering layer is a display device containing scattering particles.
  15. In Article 14, A display device in which the light scattering layer and the light conversion layer are in direct contact.
  16. Substrate; A partition wall disposed on the above substrate; A pixel electrode disposed in a light-emitting region partitioned by the partition wall on the substrate; A plurality of light-emitting elements located on the pixel electrode and extending in the thickness direction of the substrate; A common electrode located on the light-emitting element; and It includes an optical member located on the pixel electrode and overlapping with the partition wall in the thickness direction of the substrate, The plurality of light-emitting elements are disposed on one of the pixel electrodes, and The optical member comprises an optical pattern that exposes the upper surface of the pixel electrode and an optical layer disposed on the optical pattern, and The refractive index of the optical layer is greater than the refractive index of the optical pattern, and The thickness of the partition defined in the thickness direction of the substrate is greater than the thickness of the optical pattern, and A display device in which the common electrode is located on the optical pattern and the partition is located on the common electrode.
  17. In Article 16, A display device that partially overlaps the above optical pattern with the pixel electrode.
  18. In Article 17, The above optical layer is a display device that overlaps the above optical pattern.
  19. In Article 18, The optical layer is a display device that exposes the upper surface of the light-emitting element and the upper portion of the side of the light-emitting element.
  20. In Article 19, The optical layer and the common electrode disposed on the light-emitting element further comprise the above optical layer and the above light-emitting element. The above common electrode is a display device that is in direct contact with the upper surface of the light-emitting element and the upper portion of the side of the light-emitting element.

Description

Display Device The present invention relates to a display device. As the information society develops, the demand for display devices for displaying images is increasing in various forms. The display device may be a flat panel display device such as a Liquid Crystal Display, a Field Emission Display, or a Light Emitting Display. The light emitting display device may include an organic light emitting display device comprising an organic light emitting diode element as a light emitting element, an inorganic light emitting display device comprising an inorganic semiconductor element as a light emitting element, or a micro light emitting diode element (or micro light emitting diode element) as a light emitting element. Recently, head-mounted displays (HMDs) including light-emitting display devices are being developed. A Head Mounted Display (HMD) is a glasses-type monitor device for Virtual Reality (VR) or Augmented Reality that is worn in the form of glasses or a helmet, with the focus formed close to the user's eyes. A high-resolution ultra-small light-emitting diode display panel including an ultra-small light-emitting diode element is applied to the head-mounted display. Since the ultra-small light-emitting diode element emits a single color, the ultra-small light-emitting diode display panel may include a wavelength conversion layer that converts the wavelength of light emitted from the ultra-small light-emitting diode element to display various colors. FIG. 1 is a layout diagram showing a display device according to one embodiment. Figure 2 is a layout diagram showing area A of Figure 1 in detail. FIG. 3 is a layout diagram showing pixels of a display panel according to one embodiment. FIG. 4 is a cross-sectional view showing an example of a display panel cut along A-A' of FIG. 2. FIG. 5 is a cross-sectional view showing an example of a display panel cut along B-B' of FIG. 2. Figure 6 is an enlarged cross-sectional view showing in detail an example of the light-emitting element of Figure 5. Figure 7 is an enlarged cross-sectional view showing in detail an example of the bulkhead of Figure 5. FIG. 8 is a perspective view showing a capping layer and an optical member according to FIG. 5. Figure 9 is an enlarged cross-sectional view of region B of Figure 5. FIG. 10 is a cross-sectional view of a display panel according to another embodiment. FIG. 11 is a cross-sectional view of a display panel according to another embodiment. FIG. 12 is a cross-sectional view of a display panel according to another embodiment. FIG. 13 is a cross-sectional view of a display panel according to another embodiment. FIG. 14 is a cross-sectional view of a display panel according to another embodiment. Fig. 15 is an enlarged cross-sectional view showing another example of the bulkhead of Fig. 5 in detail. FIG. 16 is an exemplary drawing showing a virtual reality device including a display device according to one embodiment. FIG. 17 is an example drawing showing a smart device including a display device according to one embodiment. FIG. 18 is an exemplary drawing showing an automobile instrument panel and center fascia including a display device according to one embodiment. FIG. 19 is an exemplary drawing showing a transparent display device including a display device according to one embodiment. FIG. 20 is a layout diagram showing a display device according to another embodiment. FIG. 21 is a schematic layout of the circuit of the display device according to FIG. 20. FIG. 22 is a cross-sectional view of a display panel of a display device according to FIG. 20. FIG. 23 is a plan view showing the light-emitting regions, light-emitting elements, and optical members of a display panel according to FIG. 22. FIG. 24 is a cross-sectional view of the light-emitting element, the first pixel electrode, and the common electrode of FIG. 22. FIG. 25 is a more detailed cross-sectional view of FIG. 24. FIG. 26 is an enlarged cross-sectional view of region C of FIG. 22. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. When elements or layers are referred to as being "on" another element or layer, this includes cases where another layer or element is interposed directly on or in the middle of another element. Throughout the specification, the same reference numerals refer to the same components. Shapes, sizes, ratios, angles, numbers, etc., disclosed in the drawings for describing embodiments are exemplary and therefore