Discharging lamp lighting apparatus having optimal lighting cont

Details Discharging lamp lighting apparatus having optimal lighting cont Discharging lamp lighting apparatus having optimal lighting cont

1995-04-25

1996-12-31

Pascal, Robert

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315DIG7, 315219, 315224, H05B 3702

Patent

active

055897428

ABSTRACT:
A discharging lamp lighting apparatus is provided to perform lighting control of high voltage discharging lamps such as high pressure sodium lamp or metal halide lamp. In the discharging lamp lighting apparatus, a control section determines a power control pattern balancing with stored discharging lamp stable voltage so as to perform power control of the discharging lamp according to the pattern. If no voltage is stored, the control section performs the power control according to a power control pattern balancing with the minimum rated voltage of the discharging lamp. Then, it is possible to store the voltage when the discharging lamp is stabilized. If the discharging lamp is exchanged, the control section erases contents in stable voltage storing means so as to perform the lighting control of the discharging lamp from an initial state. As a result, the discharging lamp lighting apparatus can continuously perform the lighting control with the optimal rise characteristic of the amount of light even if characteristics of the discharging lamp may be varied due to, for example, degradation thereof.

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