Video display touch detection digitizer

Details Video display touch detection digitizer Video display touch detection digitizer

G - Physics

06

K

375/46

G06K 11/06 (2006.01) G06F 3/033 (2006.01)

Patent

CA 1233922

- 16 - VIDEO DISPLAY TOUCH DETECTION DIGITIZER Abstract of the Disclosure A video display touch detection digitizer generates the coordinate position when the video display is touched. The light signals for the X and Y coordinate array are generated from the raster scan signals of the video display during selected periods of the vertical and horizontal blanking intervals. Vertical and horizontal mirrors reflect, respectively, the resulting row and columns of light signals across the screen of the video display where other mirrors reflect the signals to, respectively, row and column signal detectors. Control circuitry detects the resulting interruption in the rows and columns of light signals when the screen of the video display is touched and generates signals representing the touch coordinates.

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