Display apparatus and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-12061390-B2
Application number	US-202217886070-A
Country	US
Kind code	B2
Filing date	Aug 11, 2022
Priority date	Apr 11, 2017
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

A display apparatus includes a backlight unit comprising a light source emitting blue light, a green color conversion material and a red color conversion material, a first polarizer disposed on the backlight unit, a first base substrate disposed on the first polarizer, a thin film transistor disposed on the first base substrate, a second polarizer disposed on the thin film transistor, a first color conversion pattern and a second color conversion pattern disposed on the second polarizer, a first color filter disposed on the first color conversion pattern, a second color filter disposed on the second color conversion pattern, a second base substrate disposed on the first and second color filters, and a third polarizer disposed on the second base substrate and having a polarizing axis same as a polarizing axis of the second polarizer.

First claim

What is claimed is:

1. A display apparatus, comprising:
a light emitting diode including first light emitting units and second light emitting units which are alternately stacked;
a first color conversion pattern and a second color conversion pattern over the light emitting diode;
a first color filter over the first color conversion pattern; and
a second color filter disposed over the second color conversion pattern,
wherein each of the first light emitting units emits light having a maximum peak wavelength of 455 nm or less, and
wherein each of the second light emitting units emits light having a wavelength greater than or equal to the maximum peak wavelength.

2. The display apparatus of claim 1 , wherein the first light emitting units include a first-first light emitting unit and a first-second light emitting unit, and the second light emitting units include a second-first light emitting unit and a second-second light emitting unit.

3. The display apparatus of claim 2 , wherein the first-first light emitting unit, the second-first light emitting unit, the first-second light emitting unit, and the second-second light emitting unit are sequentially stacked.

4. The display apparatus of claim 3 , wherein light emitted from the first-first light emitting unit transmits the second-first light emitting unit, light emitted from the second-first light emitting unit transmits the first-second light emitting unit, and light emitted from the first-second light emitting unit transmits the second-second light emitting unit.

5. The display apparatus of claim 2 , wherein the second-first light emitting unit, the first-first light emitting unit, the second-second light emitting unit, and the first-second light emitting unit are sequentially stacked.

6. The display apparatus of claim 5 , wherein light emitted from the second-first light emitting unit transmits the first-first light emitting unit, light emitted from the first-first light emitting unit transmits the second-second light emitting unit, and light emitted from the second-second light emitting unit transmits the first-second light emitting unit.

7. The display apparatus of claim 1 , wherein the light emitting diode emits light having a maximum peak wavelength of 455 nm or less.

8. The display apparatus of claim 1 , wherein the first color filter is a red color filter, the second color filter is green color filter, and the first color conversion pattern comprises the red color conversion material and the second color conversion pattern comprises the green color conversion material.

9. The display apparatus of claim 8 , wherein the red color conversion material is red quantum dot particles or red phosphor, and the green color conversion material is green quantum dot particles or green phosphor.

10. The display apparatus of claim 9 , further comprising a third color conversion pattern over the light emitting diode and comprising scattering particles.

11. The display apparatus of claim 10 , wherein the third color conversion pattern further comprises blue pigment.

12. The display apparatus of claim 10 , further comprising a third color filter which is a blue color filter disposed on the third color conversion pattern.

13. The display apparatus of claim 10 , further comprising:
a black matrix disposed between the first color filter and the second color filter,
wherein the black matrix is disposed between the first, second and third pixel areas to divide each of the first to third pixel areas, the first color filter and the first color conversion pattern overlap the first pixel area, the second color filter and the second color conversion pattern overlap the second pixel area, and the third color conversion pattern overlaps the third pixel area.

14. The display apparatus of claim 1 , further comprising a scattering layer disposed under the first and second color conversion patterns and comprising scattering particles.

15. The display apparatus of claim 1 , further comprising a second base substrate disposed on the first and second color filters.

16. A display apparatus comprising first to third pixel areas, comprising:
a light emitting diode including first light emitting units and second light emitting units which are alternately stacked;
first to third pixel electrodes in the first to third pixel areas, respectively;
first to third thin film transistors electrically connected to the first to third pixel electrodes, respectively;
a first color conversion pattern over the light emitting diode in the first pixel area;
a second color conversion pattern over the light emitting diode in the second pixel area;
a first color filter disposed on the first color conversion pattern; and
a second color filter disposed on the second color conversion pattern,
wherein each of the first light emitting units emits light having a maximum peak wavelength of 455 nm or less, and
wherein each of the second light emitting units emits light having a wavelength greater than or equal to the maximum peak wavelength.

17. The display apparatus of claim 16 , wherein the first light emitting units include a first-first light emitting unit and a first-second light emitting unit, and the second light emitting units include a second-first light emitting unit and a second-second light emitting unit.

18. The display apparatus of claim 17 , wherein the first-first light emitting unit, the second-first light emitting unit, the first-second light emitting unit, and the second-second light emitting unit are sequentially stacked.

19. The display apparatus of claim 18 , wherein light emitted from the first-first light emitting unit transmits the second-first light emitting unit, light emitted from the second-first light emitting unit transmits the first-second light emitting unit, and light emitted from the first-second light emitting unit transmits the second-second light emitting unit.

20. The display apparatus of claim 17 , wherein the second-first light emitting unit, the first-first light emitting unit, the second-second light emitting unit, and the first-second light emitting unit are sequentially stacked.

21. The display apparatus of claim 20 , wherein light emitted from the second-first light emitting unit transmits the first-first light emitting unit, light emitted from the first-first light emitting unit transmits the second-second light emitting unit, and light emitted from the second-second light emitting unit transmits the first-second light emitting unit.

22. The display apparatus of claim 16 , wherein the light emitting diode emits light having a maximum peak wavelength of 455 nm or less.

23. The display apparatus of claim 16 , wherein the first color filter is a red color filter, the second color filter is a green color filter,
wherein the first color conversion pattern comprises red color conversion material, and the second color conversion pattern comprises green color conversion material, and
wherein the red color conversion material is red quantum dot particles or red phosphor, and the green color conversion material is green quantum dot particles or green phosphor.

24. The display apparatus of claim 16 , further comprising a third color conversion pattern over the light emitting diode in the third pixel area and comprising scattering particles and blue pigment.

25. The display apparatus of claim 16 , further comprising a third color filter which is a blue color filter over the light

Assignees

• Samsung Display Co Ltd

Inventors

• Yoon Seon-Tae
• Kwon Junghyun
• Park Kisoo
• Park Haeil
• Baek Moonjung

Classifications

• G02F1/133614

  using photoluminescence, e.g. phosphors illuminated by UV or blue light · CPC title

• G02F1/133548

  Wire-grid polarisers · CPC title

• G02F1/133617

  Illumination with ultraviolet light; Luminescent elements or materials associated to the cell · CPC title

• G02F1/133514

  Colour filters · CPC title

• G02F1/133528

  Polarisers · CPC title