Optically anisotropic layer, laminate, light guide element, and head mounted display
The integration of regions with varying liquid crystal orientation patterns and non-diffractive areas in the optically anisotropic layer addresses stray light issues in AR glasses, improving their social acceptance by diffusing light uniformly.
WO2025187534A1 Publication Date: 2025-09-11FUJIFILM CORP
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Patent Information
- Application Number
- PCT/JP2025/006911
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-03-06
- Filing Date
- 2025-02-27
- Publication Date
- 2025-09-11
AI Technical Summary
Technical Problem
Conventional AR glasses using liquid crystal diffraction elements suffer from stray light emission, which negatively impacts social acceptance due to an unnatural appearance.
Method used
An optically anisotropic layer is formed with regions of varying liquid crystal orientation patterns and non-diffractive regions, integrated to suppress stray light by diffusing light in multiple directions, using a composition containing a liquid crystal compound with specific thickness and width relationships.
Benefits of technology
The solution effectively reduces stray light emission, enhancing the social acceptability of AR glasses by ensuring light is diffused uniformly without strong directional emission.
✦ Generated by Eureka AI based on patent content.
Abstract
Provided are: an optically anisotropic layer capable of suppressing stray radiation from a light guide plate; a laminate; and a light guide element and a head mounted display which use the same. This optically anisotropic layer is formed using a composition containing a liquid crystal compound, and includes at least: a region A having a liquid crystal alignment pattern in which the direction of an optic axis derived from the liquid crystal compound changes while continuously rotating along at least one direction in a plane; and a region C not having the liquid crystal alignment pattern, wherein the region A includes, in at least a portion of a side edge part in contact with the region C, a region Ad in which the liquid crystal alignment pattern changes, and the width Dd of the region Ad and the thickness T of the optically anisotropic layer have the relationship T<Dd<25×T.
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