Method for manufacturing high transmission light control film and high transmission light control film

Patent metadata

Field	Value
Publication number	US-12415327-B2
Application number	US-202217977674-A
Country	US
Kind code	B2
Filing date	Oct 31, 2022
Priority date	Dec 10, 2021
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

A method for manufacturing a high transmission light control film and the high transmission light control film are discussed. The high transmission light control film manufactured according to an embodiment can have a high aperture ratio since a louver layer is formed of a thin deposition film having a thickness of nanoscale, thereby having an improved front-view luminance.

First claim

What is claimed is:

1. A method for manufacturing a transmission light control film, the method comprising:
forming a light transmitting layer including a plurality of slots on a lower layer;
forming a louver layer by depositing a light absorbing material on the light transmitting layer;
filling the plurality of slots with resin; and
after the filling the plurality of slots with the resin, peeling off the louver layer deposited on a top surface of the light transmitting layer,
wherein the peeling off the louver layer is a selective peeling off of the louver layer using a pressure-sensitive adhesive or a UV (ultraviolet) release adhesive.

2. The method of claim 1 , wherein the forming the louver layer comprises:
depositing the light absorbing material at a first angle to a line vertical to the lower layer; and
depositing the light absorbing material at a second angle symmetrical to the first angle with respect to the line.

3. The method of claim 1 , further comprising:
removing the louver layer deposited on the top surface of the light transmitting layer.

4. The method of claim 1 , further comprising:
etching the louver layer deposited on the top surface of the light transmitting layer.

5. The method of claim 1 , further comprising:
after the filling with the resin, etching the top surface of the light transmitting layer and an upper portion of the resin.

6. The method of claim 1 , wherein the forming the light transmitting layer is through an imprinting scheme.

7. A method for manufacturing a transmission light control film, the method comprising:
forming a plurality of light transmitting layers on a lower layer;
forming a louver layer by depositing a light absorbing material; and
filling with resin,
wherein opening portions exposing the lower layer are respectively formed between the plurality of light transmitting layers,
wherein the plurality of light transmitting layers each have a cross-section of a right triangle, and each include an inclined plane and a vertical plane perpendicular to the lower layer, and
wherein the forming the louver layer comprises depositing the light absorbing material on any one of the vertical plane and the inclined plane.

8. The method of claim 7 , wherein the forming the louver layer comprises depositing the light absorbing material at an angle greater than 0 degrees and less than an angle formed by the inclined plane and the lower layer.

9. The method of claim 7 , wherein the forming the louver layer further comprises, after the depositing the light absorbing material, etching the light absorbing material deposited in the opening portions.

10. The method of claim 7 , wherein the plurality of light transmitting layers are formed by patterning via a photolithography process or an electron beam lithography process.

Assignees

• Lg Display Co Ltd

Inventors

• Han Jaejung
• Kim Jinryun
• Rhim Jusang
• Kim Daeyong
• Choi Eunhee

Classifications

• G02B5/22

  Absorbing filters {(G02B5/201 - G02B5/208 take precedence)} · CPC title

• G02B5/285 Primary

  comprising deposited thin solid films (G02B5/281 - G02B5/289 take precedence; multilayered film filters for fibre optic multiplexing G02B6/29361) · CPC title

• G02B5/003

  Light absorbing elements · CPC title

• G02B5/00 Primary

  Optical elements other than lenses (light guides G02B6/00; optical logic elements G02F3/00) · CPC title

• G02B2207/123

  Optical louvre elements, e.g. for directional light blocking · CPC title