VEHICLE LIGHTING SYSTEM - STANLEY ELECTRIC CO LTD

Title:

VEHICLE LIGHTING SYSTEM

Document Type and Number:

WIPO Patent Application WO/2021/054283

Kind Code:

A1

Abstract:

The present invention aims to reduce variation in the brightness of an irradiation light from a vehicle lighting system using a liquid crystal element. This vehicle lighting system includes a lamp unit arranged in a vehicle front section and a control unit that controls the operation of the lamp unit. The lamp unit has: a light source that is controlled by the control unit and emits light; a liquid crystal element that is controlled by the control unit, uses the light emitted from the light source, and forms irradiation light; and a lens that projects the irradiation light formed by the liquid crystal element into the vehicle surrounds. The light from the light source is incident to the liquid crystal element at a wide angle. The light incidence surface has at least: a first region in which a relatively large amount of light from a direction along the viewing direction of the liquid crystal element is incident; and a second region in which a relatively large amount of light from a direction not along the viewing direction of the liquid crystal element is incident. The control unit sets a first voltage in the first region relatively low, sets a second voltage in the second region relatively high, and drives the liquid crystal element.

Inventors:

TOKO YASUO (JP)
OWADA RYOTARO (JP)

Application Number:

PCT/JP2020/034707

Publication Date:

March 25, 2021

Filing Date:

September 14, 2020

Export Citation:

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Assignee:

STANLEY ELECTRIC CO LTD (JP)

International Classes:

B60Q1/14; F21V9/14; F21V9/40; G02F1/13; G02F1/1347; F21W102/14; F21Y101/00; F21Y115/10; F21Y115/30

Domestic Patent References:

WO2011105619A1

2011-09-01

Foreign References:

JP2019128449A	2019-08-01
JP2007026512A	2007-02-01
JP2003107530A	2003-04-09
JP2005183327A	2005-07-07

Other References: