Discharge lamp device for vehicle
AssigneeKoito Manufacturing Co., Ltd.
InventorsMasayasu Ito, Hiroshi Takeda, Shuji Matsuura, Akihiro Mochizuki, Hiroki Ishibashi, Akihiro Matsumoto
Life of this patent
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Abstract
A discharge lamp device for a vehicle includes a lighting circuit for performing lighting controls of a discharge lamp for high beam and a discharge lamp for low beam, both lamps having the same rating. The lighting circuit controls the power supply such that the electrical power input when the discharge lamp for high beam is lighted is greater than the electrical power input when the discharge lamp for low beam is lighted.
Claims20
A discharge lamp device for a vehicle comprising:
- at least two discharge lamps having the same electrical power rating;
- and
- a lighting circuit for controlling the discharge lamps;
- wherein, in lighting the discharge lamps, the lighting circuit is configured to provide one discharge lamp with a greater electrical power than another discharge lamp, wherein the discharge lamps are supplied initially with an electrical power greater than the rated electrical power to reach a steady-state intensity rapidly.
A discharge lamp device for a vehicle comprising:
- a discharge lamp for high beam;
- a discharge lamp for low beam, which have the same rating as each other, and
- a lighting circuit for performing lighting control of these lamps,
- wherein electrical power supply is so controlled that electrical power input when the above discharge lamp for high beam is lighted is greater than electrical power input when the above discharge lamp for low beam is lighted, wherein the discharge lamps are supplied initially with an electrical power greater than the rated electrical power to reach a steady-state intensity rapidly.
A discharge lamp device for a vehicle comprising:
- a first discharge lamp;
- a second discharge lamp;
- a lighting circuit for controlling the first discharge lamp and the second discharge lamp;
- wherein, in lighting the first and the second discharge lamps, the lighting circuit is configured to provide the first discharge lamp with a greater electrical power than the second discharge lamp, wherein the discharge lamps are supplied initially with an electrical power greater than the rated electrical power to reach a steady-state intensity rapidly.
Dependencies are inferred from the claim text.