Lighting method of ultra-high pressure mercury lamp
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 16, 2006
Issued Date -
N/A
app pub date -
May 12, 2004
filing date -
May 13, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A lighting device for an ac-lighting type ultra-high pressure mercury lamp includes: a stepdown chopper for converting dc voltage that is supplied from the outside to voltage of a prescribed level; a full-bridge switch circuit for generating either dc or ac voltage from the output voltage of the stepdown chopper and supplying the generated voltage to the ultra-high pressure mercury lamp; and a control circuit for controlling the full-bridge switch circuit such that, when extinguishing the lamp, a dc voltage is supplied over a prescribed time interval with a prescribed electrode of the ultra-high pressure mercury lamp as the anode.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully