Title:
HIGH PRESSURE ELECTRIC DISCHARGE LAMP PUTTING-ON DEVICE
Document Type and Number:
Japanese Patent JP3151294
Kind Code:
B2
Abstract:
PURPOSE: To prevent the dazzlement feeling and incomfortable feeling due to the light output with which the light flux speedily starts up, on the restart afte the instantaneous put OFF, when a high pressure electric discharge lamp is used as a head lamp for a vehicle.
CONSTITUTION: A put-On device for high voltage electric discharge lamp is equipped with a dc power source E, inverter In for converting the dc power source E to the rectangular wave power source or sine wave power source, and a control circuit for controlling the output of the inverter In, and the output of the inverter In is controlled so that the starting characteristics of the light at the restart of a lamp L becomes similar to that on start.
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Inventors:
Tsutomu Shiomi
Hiroshi Noro
Hiroshi Noro
Application Number:
JP12233492A
Publication Date:
April 03, 2001
Filing Date:
May 15, 1992
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS,LTD.
International Classes:
B60Q1/04; H02M7/48; H05B41/231; H05B41/24; (IPC1-7): B60Q1/04; H02M7/48; H05B41/24
Domestic Patent References:
| JP2136342A | ||||
| JP2136343A | ||||
| JP4272697A | ||||
| JP4163887A |
Attorney, Agent or Firm:
Keisei Nishikawa (1 person outside)