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Optical Keyboard

IP.com Disclosure Number: IPCOM000051996D
Original Publication Date: 1981-Apr-01
Included in the Prior Art Database: 2005-Feb-11

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Related People

Duncan, WS Higdon, JM [+details]


An optical keyboard includes a molded plastic block having arrays of intersecting light channels which are selectively blocked upon key actuation. A scanned light source is used in conjunction with a single detector.