Touch position sensitive surface

Details Touch position sensitive surface Touch position sensitive surface

1981-12-23

1984-11-20

Trafton, David L.

Communications: electrical

Audible indication

Percussion-type sound producer

178 18, 250549, 340712, G08C 900

Patent

active

044841795

ABSTRACT:
A touch sensitive device is arranged with substantially parallel surfaces which are at least partially transparent to light. A flexible membrane is supported above the top surface of the screen and when the overlay is flexed into contact with the screen, light which had passed through the screen, is trapped between the screen surfaces by total internal reflection. The edges of the screen are fitted with light detectors for gathering the trapped light. Using this arrangement positional determination of one or more screen touches is possible.

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D. Brini, L. Pell, O. Rimondi, P. Veronesi, "On Large Scintillation Counters", Supplemento al vol. II, Serie X, Del Nuovo Cimento, N. 4, 1955, 20 Semestre, pp. 1062-1069.

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