Display apparatus including a transmittance control film

Patent metadata

Field	Value
Publication number	US-12419108-B2
Application number	US-202218088434-A
Country	US
Kind code	B2
Filing date	Dec 23, 2022
Priority date	Dec 30, 2021
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

Disclosed is a display apparatus including a display panel including a plurality of light-emitting areas and a non-light-emitting area between the plurality of light-emitting areas, and a transmittance control film including a first area having first visible light transmittance, wherein the first area is disposed on the display panel and overlaps at least a portion of the non-light-emitting area, and a plurality of the second areas having second visible light transmittance higher than the first visible light transmittance, wherein the plurality of the second areas overlap the plurality of light-emitting areas.

First claim

What is claimed is:

1. A display apparatus comprising:
a display panel including a plurality of light-emitting areas and a non-light-emitting area between the plurality of light-emitting areas; and
a transmittance control film disposed on the display panel and including a first area having first visible light transmittance, wherein the first area overlaps at least a portion of the non-light-emitting area, and a plurality of second areas having second visible light transmittance higher than the first visible light transmittance, wherein the plurality of the second areas overlap the plurality of light-emitting areas,
wherein the transmittance control film contains a photochromic dye irreversibly discolored by UV irradiation and a photoacid generator, and
wherein a main absorption peak of the photoacid generator is equal to or lower than 400 nm, and is lower than a main absorption peak of the photochromic dye by 150 nm or more.

2. The display apparatus of claim 1 , wherein the first visible light transmittance is lower than 60% and the second visible light transmittance is equal to or higher than 90%.

3. The display apparatus of claim 1 , wherein the first area has a transmittance peak in a wavelength range from 510 nm to 520 nm to adjust a reflective color of the display panel and a transmittance value of the transmittance peak is in a range from 15% to 30%.

4. The display apparatus of claim 1 , wherein the display panel includes wirings and thin-film transistors disposed on one surface of a first substrate and disposed in the non-light-emitting area,
wherein the transmittance control film is disposed on the other surface of the first substrate, and the first area of the transmittance control film overlaps the wirings and the thin-film transistors.

5. The display apparatus of claim 1 , wherein the transmittance control film further includes a boundary area between the first area and the second area,
wherein the boundary area is an area where visible light transmittance gradually increases from the first area to the second area.

6. The display apparatus of claim 1 , wherein the transmittance control film is adhesive and is directly attached to an entire surface of the display panel.

7. The display apparatus of claim 1 , further comprising a base film disposed on the display panel,
wherein the transmittance control film is disposed on one surface of the base film, and the other surface of the base film is attached to an entire surface of the display panel by an adhesive layer.

8. The display apparatus of claim 7 , wherein the transmittance control film is a polymer film having no adhesiveness and having a glass transition temperature equal to or higher than 60° C.

9. The display apparatus of claim 1 , further comprising an anti-oxidation layer disposed on the transmittance control film,
wherein the anti-oxidation layer blocks wavelengths equal to or lower than 380 nm.

10. A display apparatus comprising:
a display panel including a plurality of light-emitting areas and a non-light-emitting area between the plurality of light-emitting areas; and
a transmittance control film disposed on the display panel and including an opaque area and at least overlapping wirings and thin-film transistors disposed in the non-light-emitting area and a plurality of transparent areas overlapping the plurality of light-emitting areas,
wherein the transmittance control film contains a photochromic dye irreversibly discolored by UV irradiation and a photoacid generator, and
wherein a main absorption peak of the photoacid generator is equal to or lower than 400 nm, and is lower than a main absorption peak of the photochromic dye by 150 nm or more.

11. The display apparatus of claim 10 , wherein visible light transmittance of the opaque area is lower than 60% and visible light transmittance of the transparent areas is equal to or higher than 90%.

12. The display apparatus of claim 10 , wherein the opaque area has a transmittance peak in a wavelength range from 510 nm to 520 to adjust a reflective color of the display panel and a transmittance value of the transmittance peak is in a range from 15% to 30%.

13. The display apparatus of claim 10 , wherein the transmittance control film is adhesive and is directly attached to an entire surface of the display panel.

14. The display apparatus of claim 10 , further comprising a base film disposed on the display panel,
wherein the transmittance control film is disposed on one surface of the base film, and the other surface of the base film is attached to an entire surface of the display panel by an adhesive layer.

15. The display apparatus of claim 14 , wherein the transmittance control film is a polymer film having no adhesiveness and having a glass transition temperature equal to or higher than 60° C.

16. The display apparatus of claim 10 , further comprising an anti-oxidation layer disposed on the transmittance control film,
wherein the anti-oxidation layer blocks wavelengths equal to or lower than 380 nm.

Assignees

• Lg Display Co Ltd

Inventors

• Park Suhyun
• Jung Jinhyung
• Ko Taewoon

Classifications

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• G02F2203/48

  Variable attenuator · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F2202/04

  dye · CPC title