Apparatus for lighting alternating current discharge lamp

Details Apparatus for lighting alternating current discharge lamp Apparatus for lighting alternating current discharge lamp

1997-02-07

1998-01-06

Pascal, Robert

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315224, 315DIG7, 315219, H05B 3702

Patent

active

057058970

ABSTRACT:
An alternating current discharge lamp lighting apparatus including discharge lamp, tube wall temperature measuring unit, internal temperature inferring unit and period setting unit. The tube wall temperature measuring unit measures temperature of the tube wall of the discharge lamp. The internal temperature inferring unit infers internal temperature of the discharge lamp before discharge is started based on the tube wall temperature measured by the tube wall temperature measuring unit. The period setting unit sets a direct current voltage applying period based on the inferred internal temperature by the internal temperature inferring unit.

REFERENCES:
patent: 4709188 (1987-11-01), Roberts
patent: 5068578 (1991-11-01), Wegener
patent: 5103143 (1992-04-01), Daub
patent: 5140229 (1992-08-01), Yagi et al.
patent: 5151634 (1992-09-01), Nepote et al.
patent: 5262701 (1993-11-01), Derra et al.
patent: 5434474 (1995-07-01), Ukita
patent: 5589742 (1996-12-01), Ueda

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