Light sensor circuit having a plurality of switches for selectiv

Details Light sensor circuit having a plurality of switches for selectiv Light sensor circuit having a plurality of switches for selectiv

1996-06-25

1998-04-07

Allen, Stephone B.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214SW, 250214C, H01J 4014

Patent

active

057367337

ABSTRACT:
A photosensor circuit of the present invention comprises (i) a plurality of light receiving elements for detecting incident light; (ii) a plurality of output terminals for outputting photocurrents generated in the plurality of light receiving elements; (iii) a plurality of switches for selecting connection between the light receiving element and the output element in all combinations of the plurality of light receiving elements and the plurality of output terminals; and (iv) a shift register comprised of a plurality of nodes each controlling on/off of the plurality of switches. In this arrangement, when data of off or on is input into the plurality of nodes constituting the shift register, the switches corresponding to the nodes receiving the data of off are set to be off, and the switches corresponding to the nodes receiving the data of on are set to be on. Accordingly, this photosensor circuit can take a signal generated in an arbitrary light receiving element out of the plurality of light receiving elements out through an arbitrary output terminal out of the plurality of output terminals by the simple circuit structure.

REFERENCES:
patent: 5045686 (1991-09-01), Iwanami et al.

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