Display apparatus including wave absorber for absorbing light

Patent metadata

Field	Value
Publication number	US-11482579-B2
Application number	US-202016864796-A
Country	US
Kind code	B2
Filing date	May 1, 2020
Priority date	May 31, 2019
Publication date	Oct 25, 2022
Grant date	Oct 25, 2022

Abstract

A display apparatus according to the present disclosure can include an anode electrode electrically connected to a thin film transistor disposed on a substrate of the display apparatus, a bank defining an aperture area exposing a portion of the anode electrode, an emission layer disposed on the anode electrode and radiating a light in a specific wavelength band, and a wave absorber disposing at both sides of the aperture area and absorbing the light in the specific wavelength band.

First claim

What is claimed is:

1. A display apparatus comprising:
an anode electrode electrically connected to a thin film transistor disposed on a substrate of the display apparatus;
a bank defining an aperture area exposing a portion of the anode electrode;
an emission layer disposed on the anode electrode and radiating a light in a specific wavelength band; and
a wave absorber disposing at both sides of the aperture area and absorbing the light in the specific wavelength band,
wherein the wave absorber is extended along a first horizontal direction and is disposed as being separated from the aperture area along a second horizontal direction perpendicular to the first horizontal direction.

2. The display apparatus according to claim 1 , wherein a side wall surface of the wave absorber is surrounded by the bank.

3. The display apparatus according to claim 1 , further comprising:
a cathode electrode covering the bank and the emission layer,
wherein the wave absorber is disposed between the anode electrode and the cathode electrode.

4. The display apparatus according to claim 1 , wherein the wave absorber overlays a side wall surface of the bank surrounding the aperture area.

5. The display apparatus according to claim 4 , further comprising:
a cathode electrode overlaying the bank, the wave absorber and the emission layer,
wherein the wave absorber is disposed between the cathode electrode and the bank.

6. The display apparatus according to claim 4 , wherein the wave absorber contacts both sides of the emission layer disposed at the aperture area.

7. The display apparatus according to claim 1 , wherein a length of the wave absorber along a vertical direction perpendicular to the first and second horizontal directions is approximately 3 times to 4 times of a maximum length of the aperture area along the second horizontal direction.

8. The display apparatus according to claim 1 , wherein an angle between a first line along the second horizontal direction and a second line connecting one end of the emission layer and an upper end of the wave absorber opposite the one end of the emission layer is in range of approximately 70° to 80°.

9. The display apparatus according to claim 1 , wherein a thickness of the wave absorber is approximately 1 μm or less.

10. The display apparatus according to claim 1 , further comprising:
a cathode electrode overlaying the emission layer;
an encapsulation layer overlaying the cathode electrode; and
a color filter disposed over the encapsulation layer and overlapping with the aperture area.

11. The display apparatus according to claim 10 , wherein the wave absorber is disposed at both sides of the color filter.

12. The display apparatus according to claim 1 , further comprising:
a cathode electrode overlaying the bank, the wave absorber and the emission layer;
a first encapsulation layer over the cathode electrode;
a second encapsulation layer over the first encapsulation layer; and
a first wave absorber pattern surrounding the aperture area on the second encapsulation layer, and including a same material as the wave absorber.

13. The display apparatus according to claim 12 , further comprising:
a third encapsulation layer covering the first wave absorber pattern and the second encapsulation layer;
a touch layer disposed on the third encapsulation layer; and
a second wave absorber pattern surrounding the aperture area on the touch layer, and including the same material as the wave absorber.

14. The display apparatus according to claim 1 , wherein the substrate includes a transparent area transmitting incident light, and an emission area having a plurality of pixels for radiating light, and
wherein the emission area includes a plurality of aperture areas defined by the bank.

15. A display apparatus comprising:
a substrate including a display area having a plurality of pixels;
a bank disposed on the substrate for defining an aperture area of each of the plurality of pixels;
an emission layer disposed at each of aperture areas of the plurality of pixels for radiating lights of a first wavelength band, a second wavelength band and a third wavelength band; and
a first wave absorber, a second wave absorber and a third wave absorber disposed at both sides of the aperture areas of each pixel, and absorbing the light of the first wavelength band, the light of the second wavelength and the light of the third wavelength, respectively, radiated from the aperture area,
wherein each of the first to third wave absorbers is extended along a first horizontal direction and disposed apart from the aperture area along a second horizontal direction perpendicular to the first horizontal direction.

16. The display apparatus according to claim 15 , wherein each of the first to third wave absorber is disposed at both sides of the aperture area and extending along the first horizontal direction.

17. The display apparatus according to claim 15 , wherein each of the first to third wave absorber absorbs light corresponding to each of the first to third wavelength bands, respectively, and transmits lights corresponding to other wavelength bands.

18. The display apparatus according to claim 15 , further comprising:
a first color filter, a second color filter and a third color filter overlapping with the aperture areas of each pixel,
wherein each of the first to third wave absorbers is disposed at both sides of each of the first to third color filters, respectively.

19. A display apparatus comprising:
an anode electrode electrically connected to a thin film transistor disposed on a substrate of the display apparatus;
a bank defining an aperture area exposing a portion of the anode electrode;
an emission layer disposed on the anode electrode and radiating a light in a specific wavelength band; and
a wave absorber disposing at both sides of the aperture area and absorbing the light in the specific wavelength band;
a cathode electrode overlaying the bank, the wave absorber and the emission layer;
a first encapsulation layer over the cathode electrode;
a second encapsulation layer over the first encapsulation layer; and
a wave absorber pattern surrounding the aperture area on the second encapsulation layer, and including a same material as the wave absorber.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Jinryun
• Han Jaejung
• Lee Semin
• Kim Daeyong
• Choi Eunhee

Classifications

• H10K59/87

  Passivation; Containers; Encapsulations · CPC title

• H10K59/122 Primary

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/8792 Primary

  comprising light absorbing layers, e.g. black layers · CPC title

• H01L51/5284

  Electricity · mapped topic

• H01L51/5253

  Electricity · mapped topic