A dye pdlc composition and a pdlc dimming film

The PDLC dimming film prepared by dye PDLC composition solves the problems of slow response, bluish color in dark state, lack of light blocking, lack of heat insulation, and narrow viewing angle of existing smart glass in smart electric vehicles. It achieves the effects of high off-state haze, low on-state haze, low driving voltage and wide full-light dimming range, meeting the light and heat balance requirements of smart electric vehicles.

CN119432401BActive Publication Date: 2026-05-26BEIJING BAYI SPACE LCD MATERIALS TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING BAYI SPACE LCD MATERIALS TECH
Filing Date
2024-11-06
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing smart glass used in smart electric vehicles suffers from problems such as slow response time, bluish color in dark states, lack of light blocking, lack of heat insulation, narrow viewing angle, and narrow full-light dimming range, making it difficult to meet users' needs for a balance between light and heat.

Method used

A dye-based PDLC composition containing a specific ratio of anthraquinone dichroic dye, liquid crystal composition, polymer precursor, photoinitiator, and spacer was used to prepare a PDLC dimming film with high off-state haze, low on-state haze, and low driving voltage, achieving light absorption and heat insulation, a wide range of full-light dimming, and adjustable color.

Benefits of technology

The PDLC dimming film achieves high off-state haze, low on-state haze, and low driving voltage, and has excellent performance in light absorption and heat insulation, wide full-light dimming range, and adjustable color, meeting the multi-scenario use needs of intelligent electric vehicles.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention relates to the technical field of dimming films, and particularly to a dye PDLC composition and a PDLC dimming film. Based on the total weight of the dye PDLC composition being 100%, the dye PDLC composition comprises the following components in percentage by weight: 35-66% of a liquid crystal composition, 3-7% of an anthraquinone-type dichroic dye, 30-60% of a polymer precursor, 0.05-3% of a photoinitiator, and 0.2-1% of a spacer. The polymer precursor comprises an oligomer and an active diluent with a mass ratio of 1:(2-7). The components of the dye PDLC composition provided by the present invention act synergistically, and the PDLC dimming film prepared therefrom has a high off-state haze, a low on-state haze, and a low driving voltage, and at the same time has excellent properties such as light absorption and heat insulation, a wide full-light dimming range, and color tunability.
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