Method and apparatus for controlling luminous intensity of fluor

Details Method and apparatus for controlling luminous intensity of fluor Method and apparatus for controlling luminous intensity of fluor

1982-07-21

1984-07-31

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

With radiant energy sensitive control means

Radiant energy controlled regulation of the current supply...

315151, 315309, 355 68, 355 69, H05B 4136

Patent

active

044632843

ABSTRACT:
A method of controlling the luminous intensity of a fluorescent lamp of the reproducing apparatus characterized in that a first stage for detecting the amount of light from the fluorescent lamp is linked with a second stage for controlling the lamp current of the fluorescent lamp by use of an output corresponding to the detection output of the first stage as the input. A luminous intensity controlling apparatus for fluorescent lamp of the reproducing apparatus characterized in that the fluorescent lamp is a cold cathode type fluorescent lamp, and luminosity detection device for detecting the amount of light from the cold cathode type fluorescent lamp and lamp current control device for controlling the lamp current of the cold cathode type fluorescent lamp using an output corresponding to the detection output of the luminosity detection device as the input are linked with each other.

REFERENCES:
patent: 3599037 (1971-08-01), Grace
patent: 3826569 (1974-07-01), Sakamaki et al.
patent: 4124294 (1978-11-01), Nakamura

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