Display apparatus and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-11817440-B2
Application number	US-202117534360-A
Country	US
Kind code	B2
Filing date	Nov 23, 2021
Priority date	Jul 23, 2015
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

Abstract

A display apparatus includes a support substrate, a plurality of light emitting structures regularly arranged on the support substrate, and a wavelength conversion part disposed on the plurality of light emitting structures. The wavelength conversion part includes light transmitting portions and blocking portions, the light transmitting portions being disposed on the light emitting structures, respectively, and each of the light transmitting portions including a phosphor for converting a wavelength of light emitted from the corresponding light emitting structure. The support substrate includes a plurality of conductive patterns electrically connected to the light emitting structures, and the light emitting structures are coupled to the plurality of conductive patterns.

First claim

What is claimed is:

1. A display apparatus comprising:
a support substrate;
a plurality of light emitting structures regularly arranged on the support substrate; and
a wavelength conversion part disposed on the plurality of light emitting structures,
wherein the wavelength conversion part includes light transmitting regions and blocking regions, the light transmitting regions disposed on the light emitting structures, respectively, and each of the light transmitting regions includes a wavelength converter for converting a wavelength of light emitted from the corresponding light emitting structure, and
wherein the support substrate comprises a plurality of conductive patterns electrically connected to the light emitting structures, and the light emitting structures are coupled to the plurality of conductive patterns.

2. The display apparatus of claim 1 , wherein each of the light emitting structures comprises an n-type bump and a p-type bump serving to couple the light emitting structure to the support substrate, and
wherein the n-type bumps and the p-type bumps include metallic materials to allow the light emitting structures to be electrically connected to the plurality of conductive patterns therethrough.

3. The display apparatus of claim 1 , wherein each of the light emitting structures is a flip-chip type, a vertical type, or a lateral type, and
wherein each of the light emitting structures has a size of about 2 μm to 50 μm.

4. The display apparatus of claim 1 , wherein each of the light emitting structures comprises:
an n-type semiconductor layer;
a p-type semiconductor layer; and
an active layer interposed between the n-type semiconductor layer and the p-type semiconductor layer, and
wherein the n-type semiconductor layer includes a partially exposed region formed by partially removing the p-type semiconductor layer and the active layer.

5. The display apparatus of claim 4 , wherein each of the light emitting structures are configured to emit blue light or UV light.

6. The display apparatus of claim 5 , wherein the light transmitting portions comprise a red light portion, a green light portion and a blue light portion.

7. The display apparatus of claim 6 , wherein at least one of the red light portion, the green light portion and the blue light portion comprises a quantum dot phosphor.

8. The display apparatus of claim 7 , wherein the red light portion comprises at least one of sulfide phosphors and fluoride phosphors to convert light emitted from the corresponding light emitting structure into red light having a peak wavelength of 610 nm to 650 nm.

9. The display apparatus of claim 8 , wherein the fluoride phosphors are represented by Formula A 2 MF 6 :MN 4+ , wherein A is one of Li, Na, K, Ba, Rb, Cs, Mg, Ca, Se and Zn and M is one of Ti, Si, Zr, Sn and Ge.

10. The display apparatus of claim 7 , wherein the green light portion comprises at least one of BAM (Ba—Al—Mg) phosphors, silicate phosphors, beta-SiAION phosphors, garnet phosphors, LSN phosphors and fluoride phosphors in order to convert light emitted from the light emitting structure into green light having a peak wavelength of 500 nm to 570 nm.

11. The display apparatus of claim 1 , wherein the wavelength conversion part is disposed on the light emitting structures without any growth substrate therebetween.

12. The display apparatus of claim 1 , wherein the plurality of conductive patterns is disposed on an upper surface of the support substrate to be electrically connected to the plurality of light emitting structures, and the plurality of light emitting structures is electrically connected to each other via a circuit pattern formed inside the support substrate.

13. The display apparatus of claim 1 , wherein the support substrate is an insulation substrate, a conductive substrate, or a circuit board.

14. The display apparatus of claim 13 , wherein the support substrate is a sapphire substrate, a gallium nitride substrate, a glass substrate, a silicon carbide substrate, a silicon substrate, a metal substrate, or a ceramic substrate.

15. The display apparatus of claim 13 , further comprising:
an n-type substrate electrode and a p-type substrate electrode formed on the conductive patterns to be electrically connected to an external power source.

16. The display apparatus of claim 1 , wherein the wavelength conversion part has a film shape including red portions, green portions, and blue portions.

17. The display apparatus of claim 16 , wherein each of the red, green, and blue portions includes a quantum dot phosphor.

18. A display apparatus comprising:
a support substrate;
a plurality of light emitting structures regularly arranged on the support substrate; and
a wavelength conversion part disposed on the plurality of light emitting structures,
wherein the wavelength conversion part includes light transmitting regions and blocking regions, the light transmitting regions disposed on the light emitting structures, respectively, and each of the light transmitting regions including a wavelength converter for converting a wavelength of light emitted from the corresponding light emitting structure, and
wherein the wavelength conversion part is disposed on the light emitting structures without any growth substrate therebetween.

19. The display apparatus of claim 18 , wherein each of the light emitting structures are configured to emit blue light or ultraviolet (UV) light, and
wherein the light transmitting portions comprise a red light portion, a green light portion and a blue light portion.

20. The display apparatus of claim 18 , wherein each of the red, green, and blue light portions includes a quantum dot phosphor.

Assignees

• Seoul Semiconductor Co Ltd

Inventors

• Takeya Motonobu
• Kim Young Hyun

Classifications

• H10P72/7434

  used in a transfer process involving at least two transfer steps, i.e. including an intermediate handle substrate · CPC title

• H10P72/7428

  used to support diced chips prior to mounting · CPC title

• H10P72/7416

  used during dicing or grinding · CPC title

• H10P72/7414

  the auxiliary support including means facilitating the selective separation of some of a plurality of devices from the auxiliary support · CPC title

• H10P72/742

  involving stretching of the auxiliary support post dicing · CPC title