Photoelectric touch panel having parallel light emitting and det

Details Photoelectric touch panel having parallel light emitting and det Photoelectric touch panel having parallel light emitting and det

1987-11-30

1989-06-06

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2502221, G01V 904

Patent

active

048374300

ABSTRACT:
A photoelectric touch panel has light emitting and light sensing elements mounted on the same circuit board located at one side of the panel and a reflector is placed on an opposing side of the panel thus eliminating the need for a second circuit board at the opposing side.

REFERENCES:
patent: 3764813 (1973-10-01), Clement et al.
patent: 4517559 (1985-05-01), Deitch et al.

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