Automatic adjusted light switching circuit

Details Automatic adjusted light switching circuit Automatic adjusted light switching circuit

1988-07-05

1989-10-03

Hix, L. T.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

354 62, 358 98, 128 6, G03G 708

Patent

active

048720291

ABSTRACT:
In this invention, an automatic adjusted light switching circuit which can feed an illuminating light to an endoscope is provided with a light source emitting an illuminating light to illuminate an object. The illuminating light has the light amount controlled by an iris driving circuit. An adjusted light controlling circuit for a still camera outputs a control signal controlling the iris driving circuit with a photometric signal. An adjusted light controlling circuit for a video camera outputs to the iris driving circuit a control signal for making a video signal of the most suitable brightness from a video signal obtained from a solid state imaging device imaging the object image. Either one of the control signals output by the adjusted light controlling circuit for the still camera and the adjusted light controlling circuit for the video camera is slected by a switching circuit and is input into the iris driving circuit.

REFERENCES:
patent: 4475541 (1984-10-01), Takamatsu et al.
patent: 4524761 (1985-06-01), Hattori et al.
patent: 4561429 (1985-12-01), Sato et al.

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