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
Light transformation particle and photobioreactor
System and method for investing public deposits
Methods and apparatuses for configuring and operating graphics processing units
Method and system for electronic assistance in dispensing pharmaceuticals
Managing breakpoints in a multi-threaded environment
Real-time pricing of shipping vendors
Method and system for billing based on color component histograms
  Randomly Featured Patents
Semiconductor device capacitor having a recessed contact plug
Apparatus for and method of transferring substrates
Thermoplastic air bag cover having a unitary multifunctional domed switching module
Calibration of an analogue probe
Pharmaceutical compositions of uridine triphosphate
Liquid ejection head, image forming apparatus and method of manufacturing liquid ejection head
Vehicle traction control system
Method for modifying the shiftpoints of an automatic transmission
Method and apparatus for determining turbocharger boost
Ferroelectric random access memory