Title:
灯具ユニットおよび車両用前照灯
Document Type and Number:
Japanese Patent JP4339028
Kind Code:
B2
Abstract:
A lamp unit has a semiconductor light emitting chip 24 a and a translucent member 22 which subjects light emitted from the chip 24 a to be reflected by front surface 22 a and then by rear surface 22 b to exit from the front surface 22 a. Chip 24 a is arranged to face forward such that a lower end thereof crosses an optical axis Ax of the lamp unit 20 at right angles. The front surface 22 a of the translucent member 22 is formed from a plane orthogonal to the optical axis Ax, and an optical axis region 22 a 1 of the front surface is subjected to mirror surface treatment. A rear surface 22 b of the translucent member 22 is formed using a paraboloid of rotation whose focal point is a position having symmetry with an illumination center of the chip 24 a. The rear surface is subjected to mirror surface treatment.
Inventors:
Masashi Tatsukawa
Application Number:
JP2003175213A
Publication Date:
October 07, 2009
Filing Date:
June 19, 2003
Export Citation:
Assignee:
Koito Manufacturing Co., Ltd.
International Classes:
F21S8/10; F21S8/12; F21V7/00; F21W101/10; F21Y101/02
Domestic Patent References:
| JP5017680U | ||||
| JP2001266620A | ||||
| JP2001283616A | ||||
| JP2002219994A | ||||
| JP2002094129A | ||||
| JP11054802A |
Attorney, Agent or Firm:
Takashi Moriyama