Title:
HIGH VOLTAGE DISCHARGE LAMP LIGHTING APPARATUS AND ILLUMINATING EQUIPMENT
Document Type and Number:
WIPO Patent Application WO/2008/023483
Kind Code:
A1
Abstract:
To optimally control a power outputted by a discharge lamp lighting apparatus
(1) for each of a plurality of connected discharge lamps (11) that exhibit different
loads because of the respective different gas components contained in the light
emitting tubes or because of the respective different shapes of the light emitting
tubes or other some reasons. There are included a plurality of output power characteristics
(W1,W2,W3) that are lamp-voltage/lamp-power data tables for a rated lamp voltage
range of the high voltage discharge lamp (11) and for a lower lamp voltage range
than the rated lamp voltage range; and a minimum lamp voltage determining means
(7) that causes a predetermined power to be outputted during activation of the
high voltage discharge lamp (11) and that determines the minimum lamp voltage
(Vmin) after transition to an arc discharge. According to within which one of
a plurality of predetermined voltage ranges (A,B,C) the determined minimum
lamp voltage (Vmin) is, the corresponding one of the lamp-voltage/lamp-power
data tables (W1,W2,W3) is selected.
Inventors:
MATSUZAKI NOBUTOSHI
FUKUDA KENICHI
FUKUDA KENICHI
Application Number:
PCT/JP2007/060537
Publication Date:
February 28, 2008
Filing Date:
May 23, 2007
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS LTD (JP)
MATSUZAKI NOBUTOSHI
FUKUDA KENICHI
MATSUZAKI NOBUTOSHI
FUKUDA KENICHI
International Classes:
H05B41/24
Foreign References:
| JP2001210490A | 2001-08-03 | |||
| JP2003338391A | 2003-11-28 | |||
| JP2871891B2 | 1999-03-17 | |||
| JP2005019137A | 2005-01-20 |
Other References:
See also references of EP 2063688A4
Attorney, Agent or Firm:
MIYOSHI, Hidekazu et al. (2-8 Toranomon 1-chome,Minato-k, Tokyo 01, JP)
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