Capacitive discharge-lighting of an incandescent lamp

Details Capacitive discharge-lighting of an incandescent lamp Capacitive discharge-lighting of an incandescent lamp

1997-07-14

2000-05-23

Wong, Don

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Flashers

315291, 315209R, 315241R, H05B 3700

Patent

active

06066925&

ABSTRACT:
The peak voltage of a periodic capacitive discharge, applied across first and second electrodes of the incandescent lamp, is about equal to the nominal DC voltage of the lamp multiplied by 3.2. The repetition rate of discharging, the extent of charging and discharging, and the value of the capacitance producing the periodic discharge result in the values of momentary peak and nominal temperature of the filament of the lamp being equal. Thereby, the value of peak luminous flux emission with respect to the nominal luminous flux emission of the lamp is several times greater. Where the discharge is periodic at a rate equal to about 14. HZ, then luminous flux emission by the lamp appears to the human eye to be continuously bright at an intensity equal to the peak value of luminous flux emission of the lamp, and the emission of the lamp is suitable for providing illumination. Emission of the lamp is suitable for providing emergency flashing where the discharge is periodic at a rate equal to about 1. HZ. A plurality of capacitors charged in parallel and discharged in series, as opposed to charging and discharging a single capacitor, can reduce the necessary voltage of the power supply providing the capacitive charge.

REFERENCES:
patent: 3824447 (1974-07-01), Kuwabara
patent: 4097782 (1978-06-01), Chambliss
patent: 4200823 (1980-04-01), Keeran et al.
patent: 4835665 (1989-05-01), Kao

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