Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Patent
1992-05-27
1994-10-11
Chin, Tommy P.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
250221, 341 31, G09G 302
Patent
active
053551494
ABSTRACT:
A touch screen control system having a plurality of light emitter and detector pairs positioned on opposite sides of a touch screen display. The emitters and detectors are controlled by a microprocessor-based control system that energizes each of the light emitters in a pseudorandom manner. Before each light emitter is energized, the intensity of ambient light is measured by its associated light detector, and the ambient temperature is also measured by a temperature sensor. The intensity at which the light emitter is then energized is controlled as a function of ambient light and temperature. The control system generates a bitmap identifying beams from each light emitter to its associated detector that are obscured during each of several scans of the light emitter/detector pairs. In order to reject false receptions of light from an obscured light emitter beam, the control system processes the bitmap through a predetermined voting procedure. The control system is thus able to minimize the effect of interfering light sources on the performance of the touch screen.
REFERENCES:
patent: 4057325 (1977-11-01), Kondo
patent: 4707689 (1987-11-01), DiPiazza et al.
patent: 4855590 (1989-08-01), Bures et al.
patent: 4893120 (1990-01-01), Doering et al.
patent: 4904857 (1990-02-01), Ando et al.
patent: 4943806 (1990-07-01), Masters et al.
patent: 4988983 (1991-01-01), Wehrer
patent: 5053757 (1991-10-01), Meadows
patent: 5164714 (1992-11-01), Wehrer
patent: 5179369 (1993-01-01), Person et al.
Au A.
Chin Tommy P.
SpaceLabs Medical, Inc.
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