Liquid crystal display having a frontside light control film

Patent metadata

Field	Value
Publication number	US-12353093-B2
Application number	US-202318138980-A
Country	US
Kind code	B2
Filing date	Apr 25, 2023
Priority date	Dec 14, 2018
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

A liquid crystal display comprises a backlight module comprising a reflective polarizing film, a light control film and a liquid crystal panel disposed between the backlight module and the light control film. The light control film comprises a light input surface and a light output surface opposite the light input surface and alternating transmissive and absorptive regions disposed between the light input surface and the light output surface. The absorptive regions have an aspect ratio of at least 30.

First claim

We claim:

1. A display assembly comprising:
a liquid crystal panel;
and
a light control film bonded to a view side of the liquid crystal panel by an optical adhesive, the light control film comprising:
a light input surface and a light output surface opposite the light input surface, and
alternating transmissive and absorptive regions disposed between the light input surface and the light output surface, wherein the absorptive regions have an aspect ratio of at least 30;

wherein the optical adhesive comprises a diffusing optical adhesive comprising a polymeric matrix and polymeric particles comprising polymer beads, the diffusing optical adhesive bonding the light input surface of the light control film to the liquid crystal panel.

2. The display assembly of claim 1 , wherein the diffusing optical adhesive has a clarity of less than 70% and a haze of less than 60%.

3. The display assembly of claim 1 , wherein the duty cycle of the light control film is from 70% to 99.9%.

4. The display assembly of claim 1 , wherein the diffusing optical adhesive is a pressure sensitive adhesive.

5. The display assembly of claim 1 , wherein the diffusing optical adhesive is a structural adhesive.

6. An automotive display system, comprising the display assembly of claim 1 disposed behind a cover glass of the automotive display system.

7. The automotive display system of claim 6 , further comprising a backlight, wherein the display assembly is disposed between the backlight and the cover glass of the automotive display system.

Assignees

• 3M Innovative Properties Company

Inventors

• Johnson Nicholas A
• Hao Encai
• Philippi Matthew M

Classifications

• G02F1/133605

  including specially adapted reflectors · CPC title

• G02F1/133536

  Reflective polarizers (G02F1/13362 takes precedence) · CPC title

• G02F1/133524

  Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides · CPC title

• G02F1/133607 Primary

  the light controlling member including light directing or refracting elements, e.g. prisms or lenses · CPC title

• G02F1/133504 Primary

  Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606) · CPC title