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Patent Searching and Data


Title:
LIGHT GUIDE ELEMENT
Document Type and Number:
WIPO Patent Application WO/2021/200228
Kind Code:
A1
Abstract:
Provided is a light guide element having a wide incidence angle range over which a high diffraction efficiency can be achieved. This light guide element has a light guide plate and a diffraction element arranged on a principal surface of the light guide plate, the refraction element has a liquid crystal layer that is formed using a liquid crystal composition that includes a liquid crystal compound, and that has a liquid crystal orientation pattern in which the orientation of a liquid crystal compound-derived optical axis changes while continuously rotating along at least one direction in a plane, the refractive index of the light guide plate is 1.70 or higher, and when the refractive index of the light guide plate is defined as nd and the refractive index of the liquid crystal layer is defined as nk, the inequality nk-nd≥0 is satisfied.

Inventors:
MITOBE FUMITAKE (JP)
SASATA KATSUMI (JP)
SAITOH YUKITO (JP)
WATANO AKIKO (JP)
Application Number:
PCT/JP2021/011127
Publication Date:
October 07, 2021
Filing Date:
March 18, 2021
Export Citation:
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Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B5/18; G02B5/30
Attorney, Agent or Firm:
NAKASHIMA Junko et al. (JP)
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