Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device
Patent
1996-11-22
1999-11-09
Shingleton, Michael B
Electric lamp and discharge devices: systems
Plural power supplies
Plural cathode and/or anode load device
315209R, 315307, 315DIG7, H05B 3702
Patent
active
059821043
ABSTRACT:
A driving apparatus according to the invention turns on a capacitive light emitting device having a first electrode and a second electrode in accordance with a light-on instruction. The apparatus has: a voltage accumulating unit, for example, a capacitor for holding a voltage energy corresponding to the contents of the light-on instruction; a circuit for applying the voltage energy held in the voltage accumulating unit to a portion across electrodes (A and B) in one direction in response to a first control signal and for applying the voltage energy held in the voltage accumulating unit to the portion across the electrodes in the other direction in response to a second control signal; and a circuit for alternately generating the first and second control signals. The invention can cope with a deterioration due to an aging change or the like, prevent a reduction of a light emission intensity due to the deterioration or the like, and contribute to a simplification of the construction and a decrease in costs.
REFERENCES:
patent: 5559402 (1996-09-01), Corrigan, III
patent: 5736973 (1998-04-01), Godfrey et al.
Saitoh Mamoru
Sasaki Yoshio
Pioneer Electronic Corporation
Shingleton Michael B
Tohoku Pioneer Electric Corporation
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