Resources Contact Us Home
Method and apparatus for an optical laser keypad

Image Number 3 for United States Patent #6525677.

An optical laser numeric keypad (100) provides a digital signal indicative of which of a plurality of key locations is selected. The optical laser numeric keypad (100) comprises a plurality of optical sensors (132 and 134) each configured to respond to a change in a received light quantity and to provide an electrical signal in response to a selection of a key at a key location. The received light quantity of at least one of the plurality of optical sensors (132 and 134) is changeable by selection of a key location.

  Recently Added Patents
Non-aqueous solution process for the preparation of cross-linked polymers
Device and method including a soldering process
Processing data using information embedded in a data request
Self-service administration of a database
Electrode and method for manufacturing the same
Shower bench
  Randomly Featured Patents
Intake duct and intake system for internal combustion engine
Glass holder
Driving circuit for a display apparatus
Superheated vapor generator and control system and method
System for applying fasteners to tissue
Safety harness kit
Battery can and method for manufacturing the same
Cycloolefin copolymer composition
System and method for using corrected signals from a global positioning system to perform precision survey
Embeddable mounting device and method