Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Gas sensor with a porous layer that detectably affects a surface lattice resonant condition of a nanoparticle array
Simplifying lexicon creation in hybrid duplicate detection and inductive classifier systems
Passive charge cord release system for an electric vehicle
Superagonistic anti-CD28 antibodies
Cooler
Wristwatch
Flat panel display
  Randomly Featured Patents
Toy building element
Sealed hydride batteries, including a new lid-terminal seal and electrode tab collecting comb
Eccentricity-compensated position detecting apparatus having an identifying transparent slit
Dis-azo compound and oil ink and electrowetting displays comprising the same
Ring crystallization of wafers to prevent thermal shock
Optical-modulation-type sensor and process instrumentation apparatus employing the same
Antifuse with improved radiation SEDR
Socket wrench for power tool
Transparent glass-ceramics of high negative expansion for use as decorative glazes
Epoxy composition containing acid anhydride compound obtained from nadic methyl anhydride