| US 7,365,951 B2 | ||
| Discharge lamp lighting device, lighting system and method | ||
| Yiyoung Tony Sun, Beverly, Mass. (US); Takeshi Goriki, Kyoto (Japan); and Kenichi Fukuda, Osaka (Japan) | ||
| Assigned to Matsushita Electric Works, Ltd., Osaka (Japan) | ||
| Filed on Mar. 07, 2006, as Appl. No. 11/368,667. | ||
| Prior Publication US 2007/0210727 A1, Sep. 13, 2007 | ||
| Int. Cl. H02H 3/00 (2006.01) | ||
| U.S. Cl. 361—72 [361/42; 361/65; 315/58; 315/291; 315/307] | 12 Claims |
| 1. An apparatus that protects a discharge lamp lighting device from damage resulting due to mis-wiring of a source of electrical
power to the discharge lamp lighting device, comprising:
a detector that samples at least one monitor point associated with the discharge lamp lighting device to obtain at least one
detection voltage;
a comparer that compares said at least one detection voltage with a reference voltage;
an inhibitor that inhibits an operation of the discharge lamp lighting device when a result of the comparison indicates that
a mis-wiring of the power supply to the discharge lamp lighting device exists; and
an auxiliary power supply that generates an operating voltage to power said detector, said comparer, and said inhibitor.
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