Control device having an oscillator unit that pulses a direct cu

Details Control device having an oscillator unit that pulses a direct cu Control device having an oscillator unit that pulses a direct cu

1993-01-14

1994-11-15

Pascal, Robert J.

Electric lamp and discharge devices: systems

With cathode or cathode heater supply circuit

3151691, 3151694, 315209R, H05B 3900

Patent

active

053651464

ABSTRACT:
A control device and methods of making and operating the same are provided, the control device comprising a microcomputer unit, a vacuum fluorescent display unit having a filament unit, a power supply unit for being interconnected to a high voltage alternating current power supply that has a certain frequency, and a circuit operatively interconnecting the units together, the power supply unit comprising a transformerless capacitor arrangement for creating a low voltage direct current from the power source to power the microcomputer unit, the circuit comprising an oscillator unit that receives the direct current and pulses the same through the filament unit at a frequency that is greater than the certain frequency and that causes the filament unit to heat to an operating temperature thereof.

REFERENCES:
patent: 4495445 (1985-01-01), Turney
patent: 4704560 (1987-11-01), Mills et al.

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