Optical film, optical film group, backlight module and display device

The optical film with optimized prism structures and array densities addresses the challenge of achieving specific viewing angles and brightness in automotive displays by diverting light efficiently, thus reducing power consumption and enhancing visibility.

KR102993244B1Active Publication Date: 2026-07-21RADIANT GUANGZHOU OPTO ELECTRONICS +1
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Patent Information

Application Number
KR1020247020381
Authority / Receiving Office
KR · KR
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-12-21
Filing Date
2022-04-18
Publication Date
2026-07-21
Estimated Expiration
2042-04-18

AI Technical Summary

Technical Problem

Current automotive display designs face challenges in achieving the required viewing angles and brightness while minimizing power consumption, as existing prism sheets concentrate light rays along direct vision and increasing brightness for wider angles leads to significant energy loss.

Method used

An optical film with specific prism structures and array densities that divert light into different viewing angles, maintaining brightness and reducing power consumption by optimizing light distribution.

Benefits of technology

The optical film expands the viewing angle to meet automotive display standards without increasing overall brightness, thereby reducing energy consumption and enhancing visibility from various seating positions.

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    Figure 112024066042660-PCT00001_ABST
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Abstract

The present disclosure relates to an optical film (100), an optical film group (600), a backlight module (200), and a display device (900). The optical film (100) comprises a main body (110), a plurality of first prism structures (120), and a plurality of second prism structures (130). The main body (110) has a first optical surface (111) and a second optical surface (112) facing each other. The first prism structures (120) are disposed on the first optical surface (111). Each of the first prism structures (120) has a first extension direction (D1). The second prism structures (130) are disposed on the second optical surface (112). Each of the second prism structures (130) has a second extension direction (D2). The first extension direction (D1) is different from the second extension direction (D2).
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Citation Information

Patent Citations

  • Diffusion sheet and backlight module

    CN213069418U

  • Surface light source element and image display device equipped with same

    KR1020110086067A

  • Backlight module

    US20200379159A1

  • Backlight module having an optical film and display apparatus having the same

    US20210286214A1