LAMP FOR VEHICLES - STANLEY ELECTRIC CO LTD

Title:

LAMP FOR VEHICLES

Document Type and Number:

WIPO Patent Application WO2015122481

Kind Code:

A1

Abstract:

A lamp for vehicles that uses a light polarizer that two-dimensionally scans excitation light. The lamp for vehicles forms a light intensity distribution having a relatively high light intensity in a partial area (e.g., an area in the vicinity of the center) found by the lamp. The lamp for vehicles is configured so as to form a prescribed light distribution pattern and comprises: a light polarizer that two-dimensionally scans excitation light, is arranged so as to have a first axis included in a vertical plane and a second axis included in a horizontal plane, and comprises an excitation light source, a mirror that reflects the excitation light incident from the excitation light source, a first actuator that reciprocally swings the mirror around the first axis, by resonance drive, and a second actuator that, by non-resonance drive, reciprocally swings the mirror around the second axis orthogonal to the first axis; a wavelength conversion member including a scanning area having a light intensity distribution formed by a two-dimensional image being drawn by the excitation light scanned two-dimensionally by the mirror; a control unit that controls the first actuator by resonance drive and controls the second actuator by non-resonance drive, so as to form a two-dimensional image in the scanning area by using the excitation light scanned two-dimensionally by the mirror; and an optical system that projects the light intensity distribution formed in the scanning area and forms the prescribed light distribution pattern. The lamp for vehicles is characterized by forming a light intensity distribution having a relatively high light intensity in a partial area in the scanning area, as a result of the control unit controlling the second actuator such that the speed of reciprocal swinging of the mirror around the second axis becomes relatively slow while the two-dimensional image is being drawn in the partial area in the scanning area by the excitation light being scanned two-dimensionally by the mirror.

Inventors:

YATSUDA YASUSHI (JP)
HIRASAWA HIROSHI (JP)

Application Number:

PCT/JP2015/053915

Publication Date:

August 20, 2015

Filing Date:

February 13, 2015

Export Citation:

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Assignee:

STANLEY ELECTRIC CO LTD (JP)

International Classes:

F21S8/12; F21V14/04; F21W101/10; F21Y101/02

Foreign References:

JP2013526759A	2013-06-24
JP2013134887A	2013-07-08
JP2013125693A	2013-06-24

Other References: