Title:
VEHICLE LAMP DEVICE
Document Type and Number:
Japanese Patent JP3878823
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To ensure the visibility of a driver by alternatively lighting an incandescent lamp when a discharge lamp is extinguished due to generation of load dump.
SOLUTION: In a vehicle lamp device 1, the discharge lamp 7 forms a light source for low beam, and a light source for the traveling beam or a light source (incandescent lamp) 3 as an auxiliary lamp is used for an alternative light source. If it is detected that the input voltage from a power source exceeds the threshold when only the discharge lamp is lit, the incandescent lamp is automatically lit. When the light source 3 for the traveling beam is alternatively used, dimming is performed or the irradiation direction is set downward of the horizontal direction.
Inventors:
Satoru Oda
Application Number:
JP2001243666A
Publication Date:
February 07, 2007
Filing Date:
August 10, 2001
Export Citation:
Assignee:
Koito Manufacturing Co., Ltd.
International Classes:
B60Q1/04; B60Q1/076; B60Q1/14; H05B41/46; (IPC1-7): B60Q1/04; B60Q1/14
Domestic Patent References:
| JP2001146131A | ||||
| JP2001138799A | ||||
| JP200334177A |
Attorney, Agent or Firm:
Yuji Komatsu