Touch screen input system
OwnerR. Langdon Wales, H. W. Crowleyinventors
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Abstract
A touch screen input system for use with a display screen having a photo-active display surface including a controllable sweeping beam. The system includes at least one photo-detector in combination with detection circuitry for continuously registering the position of the beam in the display surface. A pointer is adapted to reflect light from the beam to the photo-detector to provide a latch signal which is used to hold a signal identifying display screen location corresponding to pointer means location.
Claims30
A touch screen input system for use with a display screen having a photo-active display surface including a controllable sweeping beam, said system comprising:
- at least one photo-detector means, means for mounting the photo-detector means adjacent the photo-active display surface but in non-interfering view of the photo-active display surface, in combination with detection means including means for continuously registering the position of the beam in the display surface, pointer means adapted to reflect light directly from the beam to said photo-detector means to provide a latch signal, and means responsive to said latch signal and said means for continuously registering for holding a signal identifying display screen location corresponding to pointer means location.
A method of detecting the position of a pointer means on a display screen having a photo-active display surface including a controllable sweeping beam, said system comprising the steps of photo-electrically detecting reflected light from the beam directly reflected from the pointer means, continuously registering the position of the beam in the display surface, and holding a signal identifying display screen location corresponding to pointer means location upon detection of said photo-electric signal.
A touch screen input system for use with a display screen having a photo-active display surface including a controllable sweeping beam, said system comprising;
- at least one photo-detector means disposed adjacent the photo-active display surface, in combination with detection means and pointer means, said pointer means adapted to reflect light directly from the beam to said photo-detector means to provide a latch signal, said detection means responsive to said latch signal for providing a position signal identifying display screen location corresponding to pointer means location.
Dependencies are inferred from the claim text.