Low speckle rollable high gain back projection screen and method of making

By using a composite structure of flexible PET substrate, micro-pyramidal lens antireflective layer, and AF coating in the rear projection screen, the problem of the rear projection screen being unable to simultaneously achieve low speckle, high gain, wide viewing angle, and rollability is solved, achieving high-efficiency optical performance and stability, suitable for automotive and home scenarios.

CN122431053APending Publication Date: 2026-07-21SHENZHEN MICROCRYSTALLINE VISION TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN MICROCRYSTALLINE VISION TECHNOLOGY CO LTD
Filing Date
2026-06-23
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing rear projection screens cannot simultaneously achieve low speckle, high gain, wide viewing angle, no solar effect, and rollable storage performance. Furthermore, traditional flexible screens have poor optical performance, low gain, and cannot suppress speckle problems caused by RGB laser light sources.

Method used

A composite structure is constructed using a flexible PET substrate as the middle layer, combined with a micro-pyramidal lens anti-reflection layer and an AF coating. The incident surface is provided with a micro-pyramidal lens anti-reflection layer for multiple physical coupling anti-reflection, and the exit surface is provided with an exit surface scattering layer to homogenize the light. The micro-pyramidal structure and scattering particles work together to destroy laser coherence and suppress speckle. An AF coating is provided on both sides for protection.

Benefits of technology

It achieves high gain, wide viewing angle, low speckle and stable optical performance in rear projection screens, suitable for storage and installation in vehicle and home settings, extending service life, reducing production costs, and improving light utilization and screen brightness uniformity.

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Abstract

The application provides a low-speckle rollable high-gain back projection screen and a preparation method thereof, which comprises a flexible PET substrate, an optical structure layer and an exit surface scattering layer; the flexible PET substrate is used as a middle layer, an optical structure layer containing an array type micro-prism structure is arranged on an incident surface, and a first AF coating protection and anti-reflection coating is arranged to realize efficient coupling and anti-reflection of incident light and suppression of laser speckle; a scattering layer is arranged on an exit surface to homogenize light. The three-layer composite layer structure is clear in function layering, strong in optical performance synergy, in a film form, suitable for rolling characteristics, can be stored without damage, stable in optical performance after bending, and solves the problems of serious speckle, uneven picture, narrow viewing angle and easy damage of a traditional screen, and can be widely applied to various scenes such as vehicle-mounted and household.
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