Viewing-angle-symmetric light modulation device and use thereof
By combining a two-layer host-guest liquid crystal dimming device and a waveplate with an optical path equivalent to 1/2λ, the problems of non-central symmetry of viewing angle and limited superposition angle are solved, realizing a low-voltage, low-cost optical modulation device suitable for ND filters.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- JIANGSU HECHENG DISPLAY TECH CO LTD
- Filing Date
- 2025-12-26
- Publication Date
- 2026-07-09
AI Technical Summary
Existing guest-host liquid crystal dimming elements have problems such as non-central symmetry of viewing angle and limited superposition angle, making it difficult to achieve switching of multiple ND values. In addition, they have high operating voltage, complex structure, and high production cost.
By employing a combination of at least two layers of guest-host liquid crystal dimming devices and waveplates with an optical path equivalent to 1/2λ, symmetrical viewing angles are ensured. Furthermore, by controlling the rubbing direction of the alignment layer and the proportion of dichroic dyes, a wide superposition angle, low operating voltage, simple structure, and low production cost are achieved.
It achieves a centrally symmetrical viewing angle, a wide superposition angle, low operating voltage, simple structure, and low production cost, making it suitable for ND filter applications.
Smart Images
Figure CN2025146009_09072026_PF_FP_ABST