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
Structure of circuit board and method for fabricating the same
System and method for detecting deadlock in a multithread program
PC secure video path
NMR, instrumentation, and flow meter/controller continuously detecting MR signals, from continuously flowing sample material
Wind driven generator for vehicles
Control service for relational data management
Wireless control kit for camera
  Randomly Featured Patents
Coupling mechanism for quickly axially aligning rotor to journals
Solid-state image sensor device
Manufacturing defect analyzer with improved fault coverage
Method and apparatus for yarn piecing in a ringless spinning machine
Rendering text in a brew device
Signal processors
Clock style counter attachment
Tiltable marine steering helm
Method and apparatus for fast lookup of related classification entities in a tree-ordered classification hierarchy
Process for the identification or immunoassay of polypeptide antigens