US PATENT SUBCLASS 345 / 175
.~.~ Including optical detection

Current as of: June, 1999
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345 /   HD   COMPUTER GRAPHICS PROCESSING, OPERATOR INTERFACE PROCESSING, AND SELECTIVE VISUAL DISPLAY SYSTEMS

156  DF  DISPLAY PERIPHERAL INTERFACE INPUT DEVICE {8}
173  DF  .~ Touch panel {5}
175.~.~ Including optical detection

DEFINITION

Classification: 345/175

Including optical detection:

(under subclass 173) Subject matter wherein the touch panel utilizes optical sensors (e.g., photodiodes, phototransistors) for determining the position of the touch.