Optical structure and optical film for shaping brightness distribution of Lambert light source

By shaping the brightness distribution of the Lambertian light source using a lens structure, the problems of uniformity and high processing difficulty of the optical film of the prism structure are solved, achieving a smooth brightness distribution and wide viewing angle design, reducing costs, and making it suitable for applications such as panel lights and medical lighting.

CN224247996UActive Publication Date: 2026-05-15SUZHOU CRYSTALENT CO LTD
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Patent Information

Application Number
CN202521370004.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-01
Publication Date
2026-05-15
Estimated Expiration
2035-07-01

AI Technical Summary

Technical Problem

Among existing optical films, prism structure optical films have poor uniformity, are difficult to process, costly, and have limited viewing angles, making them unsuitable for certain specific needs.

Method used

The brightness distribution of the Lambertian light source is shaped using a lens structure. By adjusting parameters such as lens angle, size, and shape, the brightness distribution can be adjusted. The light source is mass-produced using UV resin materials and processes such as photolithography, hot pressing, or UV curing.

Benefits of technology

It achieves a smoother brightness distribution, reduces hotspot effects, is suitable for scenarios with high uniformity requirements, has a flexible wide viewing angle design, low cost, good process compatibility, and is easy to integrate with other optical films.

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Abstract

The utility model discloses an optical film for shaping the brightness distribution of a Lambert light source, and belongs to the field of light-transmitting structures. Comprising a base film, a plurality of optical structures are arranged on the light-emitting surface of the base film, and each optical structure comprises a first body and a second body which are of an integrated structure. The lens structure is of a two-section type combined structure, the brightness angle distribution of the LED light source is adjusted by adjusting parameters such as the angle, the size and the shape of the lens, and the needed brightness distribution effect is achieved. By adopting the lens structure, smoother brightness distribution can be realized by refracting and diffusing light rays, the hot spot effect is reduced, and the lens structure is suitable for scenes with high requirements on uniformity. The wide visual angle design of the lens structure is more flexible, and the beam angle can be flexibly controlled by adjusting the curvature and the arrangement mode of the lens. Moreover, compared with a microprism structure and a lens structure, the optical film technology compatibility is better, the microlens can be prepared in batches through technologies such as photoetching, hot pressing or UV curing, the cost is relatively low, and the optical film can be easily integrated with other optical films.
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