Title:
ILLUMINATION DEVICE AND VEHICLE LAMP SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/244736
Kind Code:
A1
Abstract:
The present invention improves the brightness of projected light in an illumination device using a liquid crystal element. This illumination device comprises: a light source; a condensing part that condenses light emitted from the light source so as to create a focal point at a prescribed location; a liquid crystal element disposed corresponding to the location of the focal point; a first polarizing element disposed on a light-entering surface side of the liquid crystal element; a second polarizing element disposed on a light-exiting surface side of the liquid crystal element; and a projection lens that magnifies and projects an image generated by the liquid crystal element, the first polarizing element, and the second polarizing element. The liquid crystal element is disposed at a tilt angle so that the light-entering surface and/or the light-exiting surface form a prescribed angle that is non-orthogonal and non-parallel to the optical axis of the projection lens.
Inventors:
IDO HIROAKI (JP)
KAMEI MATSUO (JP)
IWAMOTO YOSHIHISA (JP)
KAMEI MATSUO (JP)
IWAMOTO YOSHIHISA (JP)
Application Number:
PCT/JP2022/020404
Publication Date:
November 24, 2022
Filing Date:
May 16, 2022
Export Citation:
Assignee:
STANLEY ELECTRIC CO LTD (JP)
International Classes:
F21S41/148; F21S41/20; F21S41/25; F21S41/64; G02F1/13; F21W102/10; F21Y101/00; F21Y115/10; F21Y115/30
Foreign References:
| JP2020017367A | 2020-01-30 | |||
| JPH09500982A | 1997-01-28 | |||
| JP2018185896A | 2018-11-22 | |||
| JP2019128449A | 2019-08-01 |
Attorney, Agent or Firm:
MUTSUKI PARTNERS (JP)
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