Energizing arrangement for controlling the luminous intensity of

Details Energizing arrangement for controlling the luminous intensity of Energizing arrangement for controlling the luminous intensity of

1985-01-23

1987-03-10

Chatmon, Saxfield

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Regulator in shunt to the load device

315228, 315314, 315160, 315161, G05F 100, H05B 3702, H05B 3904, H05B 4100

Patent

active

046493220

ABSTRACT:
The arrangement of the invention enables control of a light emitting element comprising at least one discharge tube. Firing of the tube is effected by a generator which provides voltage pulses at predetermined periodic intervals (T.sub.r). The luminous intensity of the tube is controlled by a D.C. source which enables application of a discharge maintenance current to the tube, the duration of application (T.sub.c) of which depends on an instruction signal. A circuit is provided to assure synchronism between the application of the voltage pulse and the maintenance current. The arrangement may be applied in matrix displays.

REFERENCES:
patent: 3638070 (1972-01-01), Powell
patent: 4209730 (1980-06-01), Pasik

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