Composite optical film

Patent metadata

Field	Value
Publication number	US-12085737-B2
Application number	US-202318125724-A
Country	US
Kind code	B2
Filing date	Mar 23, 2023
Priority date	Jul 7, 2021
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

A composite optical film comprises a first optical film and a second optical film disposed on the first optical film, wherein the first optical film comprises a first substrate; a plurality of reversed prisms disposed on a bottom surface of the first substrate; and a first diffusion film disposed over a top surface of the first substrate; and the second optical film comprises a first PET film thereon having a first set of prisms and a second PET film having a second set of prisms thereon, wherein the first PET film and the second PET film are laminated together.

First claim

What is claimed is:

1. A composite optical film, comprising:
a first optical film, comprising:
a first substrate;
a plurality of reversed prisms, disposed on a bottom surface of the first a first diffusion layer, disposed on a top surface of the first substrate;
substrate; and

a second optical film, comprising:
a second substrate, wherein a first plurality of prisms are on a top surface of the second substrate;
a third substrate, wherein a second plurality of prisms are on a top surface of the third substrate, wherein the third substrate is located above the second substrate; and
an adhesive layer, disposed between a bottom surface of the third substrate and the first plurality of prisms, wherein the third substrate and the first plurality of prisms are laminated by the adhesive layer; and
wherein the second optical film is disposed on the first optical film, wherein a haze of the adhesive layer is 8-30%.

2. The composite optical film according to claim 1 , wherein the second substrate and the first plurality of prisms have a first unitary body.

3. The composite optical film according to claim 2 , wherein the third substrate and the second plurality of prisms have a second unitary body.

4. The composite optical film according to claim 1 , wherein the adhesive layer is coated on the bottom surface of the second substrate.

5. The composite optical film according to claim 1 , wherein the adhesive layer comprises a thermal-curable resin coated on the bottom surface of the second substrate.

6. The composite optical film according to claim 1 , wherein the adhesive layer comprises a photo-curable resin coated on the bottom surface of the second substrate.

7. The composite optical film according to claim 1 , wherein a ridgeline of the second plurality of prisms has a shape of a wave swinging left and right.

8. The composite optical film according to claim 1 , wherein a ridgeline of the second plurality of prisms has a shape of a sawtooth swinging up and down.

9. The composite optical film according to claim 1 , wherein the thickness of the second substrate is 70-80 um, and the thickness of the third substrate is 45-55 um.

10. The composite optical film according to claim 9 , wherein the total thickness of the second optical film is 180-190 um.

11. The composite optical film according to claim 1 , wherein a ridgeline of the plurality of reversed prisms has a shape of a wave swinging left and right.

12. The composite optical film according to claim 1 , wherein a ridgeline of the plurality of reversed prisms has a shape of a sawtooth swinging up and down.

13. The composite optical film according to claim 1 , wherein a first plurality of diffusion particles are disposed in the adhesive layer.

14. The composite optical film according to claim 1 , wherein a second diffusion layer is disposed on a bottom surface of the third substrate.

15. The composite optical film according to claim 1 , wherein a clear HC resin layer is disposed on a bottom surface of the third substrate.

16. The composite optical film according to claim 1 , wherein a matte structure is formed on a bottom surface of the third substrate.

17. A composite optical film, comprising:
a first optical film, comprising:
a first substrate;
a plurality of reversed prisms, disposed on a bottom surface of the first substrate; and
a first diffusion layer, disposed on a top surface of the first substrate;

a second optical film, comprising:
a second substrate, wherein a first plurality of prisms are on a top surface of the second substrate;
a third substrate, wherein a second plurality of prisms are on a top surface of the third substrate, wherein the third substrate is located above the second substrate; and
an adhesive layer, disposed between a bottom surface of the third substrate and the first plurality of prisms, wherein the third substrate and the first plurality of prisms are laminated by the adhesive layer; and
wherein the second optical film is disposed on the first optical film, wherein the plurality of reversed prisms comprises a plurality of first-type reversed prisms and a plurality of second-type reversed prisms, wherein a first peak point of the first-type prism is located lower than a second peak point of the second-type prism, wherein the plurality of first-type reversed prisms and the plurality of second-type reversed prisms are interleaved along an edge of the bottom surface of the first substrate.

18. A composite optical film, comprising:
a first optical film, comprising:
a first substrate;
a plurality of reversed prisms, disposed on a bottom surface of the first substrate; and
a first diffusion layer, disposed on a top surface of the first substrate;

a second optical film, comprising:
a second substrate, wherein a first plurality of prisms are on a top surface of the second substrate;
a third substrate, wherein a second plurality of prisms are on a top surface of the third substrate, wherein the third substrate is located above the second substrate; and
an adhesive layer, disposed between a bottom surface of the third substrate and the first plurality of prisms, wherein the third substrate and the first plurality of prisms are laminated by the adhesive layer; and
wherein the second optical film is disposed on the first optical film, wherein the plurality of reversed prisms comprises a plurality of first-type reversed prisms and a plurality of second-type reversed prisms, wherein a first peak point of the first-type prism is located lower than a second peak point of the second-type prism, wherein for each two adjacent first-type reversed prisms, there are two of the second-type reversed prisms located between said two adjacent first-type reversed prisms.

Assignees

• Ubright Optronics Corp

Inventors

• Tyan Yi-Long
• Yang Ching-An
• Juan Yu-Mei
• Tsai Hsin-Yi
• Hsiao Yu-Cheng
• Hsin Lung-Pin
• Chen hui-yong

Classifications

• G02B6/0051

  Diffusing sheet or layer · CPC title

• G02B6/0053

  Prismatic sheet or layer; Brightness enhancement element, sheet or layer · CPC title

• G02B5/0231

  the surface having microprismatic or micropyramidal shape (macroscopic prism arrays G02B5/045) · CPC title

• G02B5/045

  Prism arrays · CPC title

• G02B5/0278 Primary

  used in transmission · CPC title