Apparatus and method for using ambient light to control electron

Details Apparatus and method for using ambient light to control electron Apparatus and method for using ambient light to control electron

1990-11-29

1992-10-27

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

G01D 534

Patent

active

051591910

ABSTRACT:
A broadcast receiver is disclosed which is powered by a solar cell in combination with a rechargeable battery mounted within a waterproof housing which is adapted for attachment to a lounge chair used for suntanning. The control of power, tuning and volume functions is accomplished using photodetectors mounted within and adjacent transparent areas of the housing. User operated shutters mounted external to the housing shield selective photodetectors from ambient light. A separate data entry shutter is used to enable memory circuits which store control signals corresponding to the shielded photodetectors. The stored control signals are used to control the operating functions of the receiver. Audio signals are inductively coupled through the housing to external headphones.

REFERENCES:
patent: 4329581 (1982-05-01), Helfrich et al.
patent: 4876446 (1989-10-01), Kambe et al.
patent: 4937443 (1990-06-01), Smoot

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