Optical elements, light guide elements, and AR display devices
A laminated cholesteric liquid crystal structure with varying helical pitches addresses the challenge of reflecting RGB light in AR glasses, achieving a wide reflective wavelength range and uniform brightness distribution for improved AR display quality.
JP2026115361APending Publication Date: 2026-07-09SHARP DISPLAY TECHNOLOGY CORP
Patent Information
- Application Number
- JP2024232016
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-07-09
Smart Images
Figure 2026115361000001_ABST
Abstract
The present invention provides an optical element that uses a cholesteric liquid crystal, has a wide reflective wavelength range, and is highly productive, as well as a light guide element and an AR display device using the optical element. [Solution] An optical element comprising a cholesteric liquid crystal layer having a first cholesteric liquid crystal layer and a second cholesteric liquid crystal layer laminated on the first cholesteric liquid crystal layer, wherein both the first cholesteric liquid crystal layer and the second cholesteric liquid crystal layer contain a polymerizable liquid crystal compound and a chiral agent, wherein the helical pitch of the first cholesteric liquid crystal layer is shorter in a first region closer to one end than the center in a first direction in the plane than in a second region closer to the other end than the center in the first direction, and the helical pitch of the second cholesteric liquid crystal layer is longer in the first region than in the second region.
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Citation Information
Patent Citations
Multilayer liquid crystal diffractive gratings for redirecting light of wide incident angle ranges
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Optical element, light guide element, and image display device
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