Optical gating scheme for display touch control

Details Optical gating scheme for display touch control Optical gating scheme for display touch control

1982-08-12

1985-05-14

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340365P, 340794, 340707, 178 18, 250221, 250549, G09G 100

Patent

active

045175594

ABSTRACT:
A touch-operated display for a CRT faceplate includes a plurality of optical gates for energizing light-emitting diodes in response to generation of the CRT raster thus eliminating the need for external switching of the beam generating means to produce the grid of crossing light paths. A frame is disclosed for mounting the light sources, detectors and common optical gates--all of which take the form of silicon chips.

REFERENCES:
patent: 3711846 (1973-01-01), Schlisser et al.
patent: 4459476 (1984-07-01), Weissmueller et al.

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