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US-12622112-B2 - Display device

US12622112B2US 12622112 B2US12622112 B2US 12622112B2US-12622112-B2

Abstract

A display device includes a light-emitting substrate, a counter substrate, multiple color conversion layers, a low-refractive-index layer, and multiple patterned Fabry-Perot filter layers. The light-emitting substrate is used to emit a light. The counter substrate is disposed opposite to the light-emitting substrate. The color conversion layers are disposed between the light-emitting substrate and the counter substrate. The low-refractive-index layer is disposed between the counter substrate and the color conversion layers. The refractive index of the low-refractive-index layer is less than or equal to that of the color conversion layers. The patterned Fabry-Perot filter layers are disposed between the low-refractive-index layer and the color conversion layers. Each of the patterned Fabry-Perot filter layers has multiple through-holes and includes two reflective layers and a spacer layer between the two reflective layers. The material of the two reflective layers includes silver, and the material of the spacer layer includes silicon oxide.

Inventors

  • Tzu-Chieh Lin
  • Chun-Liang Lin

Assignees

  • AUO Corporation

Dates

Publication Date
20260505
Application Date
20231219
Priority Date
20230617

Claims (19)

  1. 1 . A display device, comprising: a light-emitting substrate, used to emit a light; a counter substrate, disposed opposite to the light-emitting substrate; multiple color conversion layers, disposed between the light-emitting substrate and the counter substrate; a low-refractive-index layer, disposed between the counter substrate and the color conversion layers, wherein a refractive index of the low-refractive-index layer is less than or equal to a refractive index of each of the color conversion layers; and multiple patterned Fabry-Perot filter layers, disposed between the low-refractive-index layer and the color conversion layers, and each of the patterned Fabry-Perot filter layers having multiple through-holes and comprising two reflective layers and a spacer layer between the two reflective layers, wherein a material of the two reflective layers comprises silver, and a material of the spacer layer comprises silicon oxide.
  2. 2 . The display device according to claim 1 , wherein the counter substrate has multiple sub-pixel areas, each of the sub-pixel areas has a sub-pixel width in a first direction, each of the through-holes has an opening width in the first direction, and the opening width is greater than or equal to 1 μm, and less than the sub-pixel width.
  3. 3 . The display device according to claim 1 , wherein the color conversion layers convert the light into a colored light, a emission wavelength of colored light is λ, a thickness of the spacer layer is t, and a refractive index of the spacer layer is n, wherein n × t = 1 4 ⁢ λ ± 10 ⁢ % .
  4. 4 . The display device according to claim 1 , wherein a thickness of the spacer layer is smaller than a thickness of the low-refractive-index layer.
  5. 5 . The display device according to claim 1 , wherein the refractive index of the low-refractive-index layer is in a range of 1.2 and 1.9.
  6. 6 . The display device according to claim 1 , wherein the refractive index of the color conversion layer is in a range of 1.6 and 2.2.
  7. 7 . The display device according to claim 1 , wherein thicknesses of the two reflective layers are substantially identical to each other.
  8. 8 . A display device, comprising: a light-emitting substrate, used to emit a light; a counter substrate, disposed opposite to the light-emitting substrate; multiple color conversion layers, disposed between the light-emitting substrate and the counter substrate, and comprising multiple first color-conversion layers and multiple second color conversion layers used to convert the light into a first colored light and a first colored light, respectively, wherein a color of the first colored light is different from a color of the second colored light; a low-refractive-index layer, disposed between the counter substrate and the color conversion layers, wherein a refractive index of the low-refractive-index layer is less than or equal to a refractive index of each of the color conversion layers; and multiple patterned Fabry-Perot filter layers, each of the patterned Fabry-Perot filter layers having multiple through-holes, and the patterned Fabry-Perot filter layers comprising multiple first patterned Fabry-Perot filter layers and multiple second patterned Fabry-Perot filter layers, wherein each of the first patterned Fabry-Perot filter layers is disposed between each of the first color conversion layers and the low-refractive-index layer and comprises a first intermediate layer, and each of the second patterned Fabry-Perot filter layers is disposed between each of the second color conversion layers and the low-refractive-index layer and comprises a second intermediate layer, wherein a thickness of the first intermediate layer is different from a thickness of the second intermediate layer.
  9. 9 . The display device according to claim 8 , wherein the counter substrate has multiple sub-pixel areas, each of the sub-pixel areas has a sub-pixel width in a first direction, each of the through-holes has an opening width in the first direction, and the opening width is greater than or equal to 1 μm, and less than the sub-pixel width.
  10. 10 . The display device according to claim 8 , wherein an emission wavelength of the first colored light is λ1, the thickness of the first intermediate layer is t1, and a refractive index of the first intermediate layer is n1, wherein n ⁢ 1 × t ⁢ 1 = 1 4 ⁢ λ ⁢ 1 ± 10 ⁢ % .
  11. 11 . The display device according to claim 8 , wherein an emission wavelength of the second colored light is λ2, the thickness of the second intermediate layer is t2, and a refractive index of the second intermediate layer is n2, wherein n ⁢ 2 × t ⁢ 2 = 1 4 ⁢ λ ⁢ 2 ± 10 ⁢ % .
  12. 12 . The display device according to claim 8 , wherein the thickness of the first intermediate layer is less than a thickness of the low-refractive-index layer, and the thickness of the second intermediate layer is less than the thickness of the low-refractive-index layer.
  13. 13 . The display device according to claim 8 , wherein an emission wavelength of the first colored light is greater than an emission wavelength of the second colored light, and the thickness of the first intermediate layer is greater than the thickness of the second intermediate layer.
  14. 14 . The display device according to claim 8 , wherein the refractive index of the low-refractive-index layer is in a range of 1.2 and 1.9.
  15. 15 . The display device according to claim 8 , wherein the refractive index of the color conversion layer is in a range of 1.6 and 2.2.
  16. 16 . The display device according to claim 8 , wherein each of the first patterned Fabry-Perot filter layers comprises two first reflective layers, and the first intermediate layer is located between the two first reflective layers.
  17. 17 . The display device according to claim 16 , wherein thicknesses of the two first reflective layers are substantially identical to each other.
  18. 18 . The display device according to claim 8 , wherein the second patterned Fabry-Perot filter layer comprises two second reflective layers, and the second intermediate layer is located between the two second reflective layers.
  19. 19 . The display device according to claim 18 , wherein thicknesses of the two second reflective layers are substantially identical to each other.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to Taiwan Application Serial Number 112122843, filed Jun. 17, 2023, which is herein incorporated by reference in its entirety. BACKGROUND Field of Invention The present disclosure relates to a display device, and in particular, to a display device including patterned Fabry-Perot filter layers. Description of Related Art A micro-light-emitting diode (micro-LED) display device has the advantages of power saving, high efficiency, high brightness, fast response time, etc. In order to achieve full-color, one current approach is to dispose a color conversion material on a micro-light-emitting diode that needs light color conversion, to convert a light color of the micro-light-emitting diode into a different light color. However, the above approach still has the problem that the light of the micro-light-emitting diode can not be fully converted into a predetermined colored light, resulting in poor light conversion efficiency and insufficient color purity of the color of the outgoing light. SUMMARY The disclosure provides a display device, which can improve the light conversion efficiency and the color purity of the color of the outgoing light. The display device according to at least one embodiment of the present disclosure includes a light-emitting substrate, a counter substrate, multiple color conversion layers, a low-refractive-index layer, and multiple patterned Fabry-Perot filter layers. The light-emitting substrate is used to emit a light. The counter substrate is disposed opposite to the light-emitting substrate. The color conversion layers are disposed between the light-emitting substrate and the counter substrate. The low-refractive-index layer is disposed between the counter substrate and the color conversion layers. The refractive index of the low-refractive-index layer is less than or equal to the refractive index of each of the color conversion layers. The patterned Fabry-Perot filter layers are disposed between the low-refractive-index layer and the color conversion layers. Each of the patterned Fabry-Perot filter layers has multiple through-holes and includes two reflective layers and a spacer layer between the two reflective layers. The material of the two reflective layers includes silver, and the material of the spacer layer includes silicon oxide. The display device according to at least another embodiment of the present disclosure includes a light-emitting substrate, a counter substrate, multiple color conversion layers, a low-refractive-index layer, and multiple patterned Fabry-Perot filter layers. The light-emitting substrate is used to emit a light. The counter substrate is disposed opposite to the light-emitting substrate. The color conversion layers are disposed between the light-emitting substrate and the counter substrate, and include multiple first color conversion layers and multiple second color conversion layers, which are used to convert the light into a first colored light and a second colored light, respectively, where the color of the first colored light is different from the color of the second colored light. The low-refractive-index layer is disposed between the counter substrate and the color conversion layers. The refractive index of the low-refractive-index layer is less than or equal to the refractive index of each of the color conversion layers. Each of the patterned Fabry-Perot filter layers has multiple through-holes. The patterned Fabry-Perot filter layers include multiple first patterned Fabry-Perot filter layers and multiple second patterned Fabry-Perot filter layers. Each of the first patterned Fabry-Perot filter layers is disposed between each of the first color conversion layers and the low-refractive-index layer, and includes a first intermediate layer. Each of the second Fabry-Perot filter layers is disposed between each of the second color conversion layers and the low-refractive-index layer, and includes a second intermediate layer. The thickness of the first intermediate layer is different from the thickness of the second intermediate layer. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial cross-sectional schematic diagram of a display device according to at least one embodiment of the present disclosure. FIG. 2 is an enlarged schematic diagram of an area A in FIG. 1. FIG. 3 is an enlarged schematic diagram of an area B in FIG. 1. FIG. 4 is a partial cross-sectional schematic diagram of a display device according to at least another embodiment of the present disclosure. FIG. 5 is an enlarged schematic diagram of an area C in FIG. 4. DETAILED DESCRIPTION In the following description, in order to clearly present the technical features of the present disclosure, the dimensions (such as length, width, thickness, and depth) of elements (such as layers, films, substrates, and areas) in the drawings will be enlarged in unequal proportions. Therefore, the description and explanation of the fo