Invention Grant
- Patent Title: Lighting device
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Application No.: US16231350Application Date: 2018-12-21
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Publication No.: US10738958B2Publication Date: 2020-08-11
- Inventor: Yasuo Toko , Yoshifumi Takao , Takashi Sugiyama
- Applicant: STANLEY ELECTRIC CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: STANLEY ELECTRIC CO., LTD.
- Current Assignee: STANLEY ELECTRIC CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Kenealy Vaidya LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@5e773376
- Main IPC: F21S41/64
- IPC: F21S41/64 ; F21S41/135 ; F21S41/25 ; F21S41/141 ; F21S41/176 ; B60Q1/14 ; H05B47/105 ; F21Y115/10

Abstract:
A lighting device comprising: a light source for emitting lights along optic axis toward field of view; a liquid crystal element disposed on the optic axis, having electrode pattern in far field FF corresponding region and having no electrode pattern in near field corresponding region; a pair of polarizers including input side and output side polarizers sandwiching the liquid crystal element, constituting crossed Nicol polarizers; driver circuit for forming voltages applied to the electrode pattern; and phase shift forming element disposed between the pair of polarizers in the near field corresponding region of the liquid crystal element; wherein the far field corresponding region constitutes normally black optic system together with the pair of polarizers, and the near field corresponding region constitutes normally-on optic system together with the phase shift forming element and the pair of polarizers.
Public/Granted literature
- US20190195457A1 LIGHTING DEVICE Public/Granted day:2019-06-27
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