Display apparatus

Patent metadata

Field	Value
Publication number	US-2024297275-A1
Application number	US-202318545667-A
Country	US
Kind code	A1
Filing date	Dec 19, 2023
Priority date	Mar 2, 2023
Publication date	Sep 5, 2024
Grant date	—

Abstract

A display apparatus includes a display module array including a plurality of display modules that are horizontally arranged in a form of a matrix. Each display module includes a substrate including a mounting surface and a rear surface opposite to the mounting surface; a metal plate bonded to the rear surface and configured to dissipate heat from the substrate; a front cover covering the mounting surface; inorganic light emitting devices electrically connected to the mounting surface; and a color layer between the inorganic light emitting devices and the front cover. The color layer includes a scattering layer through which light emitted from a third inorganic light emitting device passes. Each display module further includes scattering particles provided in the scattering layer and configured to scatter the light emitted from the third inorganic light emitting device and passing through the scattering layer.

First claim

What is claimed is:

1 . A display apparatus comprising:
a display module array comprising a plurality of display modules that are horizontally arranged in a form of a matrix, wherein each of the plurality of display modules comprises: a substrate comprising a mounting surface and a rear surface opposite to the mounting surface; a metal plate bonded to the rear surface and configured to dissipate heat from the substrate; a front cover covering the mounting surface; inorganic light emitting devices electrically connected to the mounting surface, the inorganic light emitting devices comprising:
a first inorganic light emitting device configured to emit light;
a second inorganic light emitting device configured to emit light; and
a third inorganic light emitting device configured to emit light;
a color layer between the inorganic light emitting devices and the front cover, the color layer comprising:
a first color conversion layer through which the light emitted from the first inorganic light emitting device passes;
a second color conversion layer through which the light emitted from the second inorganic light emitting device passes; and
a scattering layer through which the light emitted from the third inorganic light emitting device passes; and
scattering particles provided in the scattering layer and configured to scatter the light emitted from the third inorganic light emitting device and passing through the scattering layer.

2 . The display apparatus of claim 1 , wherein the scattering particles are provided at a front portion in the scattering layer.

3 . The display apparatus of claim 2 , further comprising a scattering particle layer in which the scattering particles are provided,
wherein a ratio of a thickness of the scattering particle layer to a thickness of the scattering layer is 0.3 to 1.

4 . The display apparatus of claim 3 , wherein the color layer further comprises a position guide portion between the first color conversion layer, the second color conversion layer, and the scattering layer.

5 . The display apparatus of claim 4 , wherein each of the plurality of display modules further comprises:
a black matrix between the front cover and the position guide portion; and a color filter between the front cover and each of the first color conversion layer, the second color conversion layer, and the scattering layer.

6 . The display apparatus of claim 5 , wherein the color filter comprises:
a first color filter between the first color conversion layer and the front cover; a second color filter between the second color conversion layer and the front cover; and a third color filter between the scattering layer and the front cover, wherein the black matrix is between the first color filter, the second color filter, and the third color filter.

7 . The display apparatus of claim 6 , wherein each of the inorganic light emitting devices is a blue inorganic light emitting device.

8 . The display apparatus of claim 7 , wherein each of the first color conversion layer and the second color conversion layer comprises quantum dots configured to convert blue light to another color.

9 . The display apparatus of claim 1 , wherein the scattering particles comprise at least one of titanium dioxide (TiO 2 ), zinc oxide (ZnO), zirconium dioxide (ZrO 2 ), and aluminum oxide (Al 2 O 3 ).

10 . The display apparatus of claim 1 , wherein the scattering particles have a size of 100 nm to 500 nm.

11 . The display apparatus of claim 1 , wherein the scattering layer further comprises a resin mixed with the scattering particles, and
wherein a proportion of a weight of the scattering particles in a total weight of the scattering particles and the resin is 2 wt % to 10 wt %.

12 . The display apparatus of claim 1 , wherein the first color conversion layer comprises a quantum dot layer accommodating quantum dots adjacent to the mounting surface and configured to convert a color of light emitted from the inorganic light emitting device and
wherein the second color conversion layer comprises a quantum dot layer accommodating quantum dots adjacent to the mounting surface and configured to convert a color of the light emitted from the second inorganic light emitting device.

13 . The display apparatus of claim 12 , wherein a ratio of a thickness of the quantum dot layer to a thickness of each of the first color conversion layer and the second color conversion layer is 0.2 to 1.

14 . The display apparatus of claim 13 , wherein the color layer further comprises a position guide portion between the first color conversion layer, the second color conversion layer, and the scattering layer, and configured to absorb and reflect the light emitted from the inorganic light emitting devices.

15 . The display apparatus of claim 14 , wherein each of the plurality of display modules further comprises:
a black matrix between the front cover and the position guide portion; and a color filter between the front cover and each of the first color conversion layer, the second color conversion layer, and the scattering layer.

16 . A display apparatus comprising:
a substrate comprising a mounting surface and a rear surface opposite to the mounting surface; inorganic light emitting devices electrically connected to the mounting surface and comprising:
a first inorganic light emitting device configured to emit light:
a second inorganic light emitting device configured to emit light; and
a third inorganic light emitting device configured to emit light; and
a color layer disposed further from the mounting surface than the inorganic light emitting devices, the color layer comprising:
a first color conversion layer through which the light emitted from the first inorganic light emitting device, the first color conversion layer comprising quantum dots configured to convert a color of the light emitted from the first inorganic light emitting device;
a second color conversion layer through which the light emitted from the second inorganic light emitting device passes, the second color conversion layer comprising quantum dots configured to convert a color of the light emitted from the second inorganic light emitting device; and
a scattering layer through which the light emitted from the third inorganic light emitting device passes, scattering particles being provided in the scattering layer to scatter the light emitted from the third inorganic light emitting device and passing through the scattering layer.

17 . The display apparatus of claim 16 , wherein each of the first color conversion layer and the second color conversion layer comprises a quantum dot layer accommodating the quantum dots and provided at a mounting surface side in the first color conversion layer and the second color conversion layer, respectively.

18 . The display apparatus of claim 17 , wherein a ratio of a thickness of the quantum dot layer to a thickness of each of the first color conversion layer and the second color conversion layer is 0.2 to 1.

19 . The display apparatus of claim 16 , wherein each of the inorganic light emitting devices is a same color.

20 . The display apparatus of claim 19 , wherein each of the inorganic light emitting devices is a blue inorganic light emitting device, and the quantum dots are configured to convert blue light to another color.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Koh Sungjun
• Lee Daehee
• Park Yeseul
• Cha Yongdok

Classifications

• H10W90/00

  Package configurations · CPC title

• H10H20/855

  Optical field-shaping means, e.g. lenses · CPC title

• H10H20/882

  Scattering means (H10H20/82 takes precedence) · CPC title

• H10H20/8512 Primary

  Wavelength conversion materials · CPC title

• H01L33/58

  Electricity · mapped topic