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
Distributed IPv6 neighbor discovery for large datacenter switching systems
Viruses lacking epithelial cell receptor entry
Optical packet signal transmission device and WDM optical communication network
Switching element for a valve train of an internal combustion engine
Systems and methods for classifying electronic information using advanced active learning techniques
Phenethanolamine derivatives for treatment of respiratory diseases
Apparatus and method for extracting cascading style sheet rules
  Randomly Featured Patents
System and method of enhancing efficiency and utilization of memory bandwidth in reconfigurable hardware
Thienopyrazoles
Method for detecting cyanide in cutaneously transpired gas
Display screen support mechanism and television set
Illumination device with allowable error amount of telecentricity on the surface of the object to be illuminated and exposure apparatus using the same
Windshield washer fluid dispensing system
Heat sink clip tool
Motorcycle undertail exhaust
Computer-implemented systems and methods for executing stochastic discrete event simulations for design of experiments
Cup for an open air stove