Fluorescent optical switch and keyboard apparatus

Details Fluorescent optical switch and keyboard apparatus Fluorescent optical switch and keyboard apparatus

1984-04-25

1986-10-14

Laroche, Eugene R.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340 36SP, G01D 534

Patent

active

046174613

ABSTRACT:
Fluorescent optical switch and keyboard apparatus wherein a plurality of fluorescent optical key switches are arranged in a matrix array of rows and columns with a key disposed at each column-row intersection and wherein each key carries a fluorescent optically reflective element thereon. A single optical photo-diode disposed at each key location is caused to operate in three discrete modes with respect to the fluorescent element. In one mode the diode emits light which is caused to be reflected upon key when the key is depressed. In another mode the reflected light striking the diode causes the diode to act as a photo-receptor effectively indicating key actuation.

REFERENCES:
patent: 4379968 (1983-04-01), Ely et al.
patent: 4480182 (1984-10-01), Ely et al.

Affiliated with

Also associated with

Rating

Fluorescent optical switch and keyboard apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fluorescent optical switch and keyboard apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluorescent optical switch and keyboard apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1341713