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
Method and system for establishing enhanced key when terminal moves to enhanced universal terminal radio access network (UTRAN)
One-dimensional metal nanostructures
IC layout parsing for multiple masks
Selective facsimile denial
Probe for ultrasound diagnostic apparatus
Second order correction circuit and method for bandgap voltage reference
Header rail for a shower screen or the like
  Randomly Featured Patents
Safety module electrical distribution system
Lipstick case
Human restrictin and nucleic acid sequences
Quantitation of viruses by light scattering
Stackable receptacle assembly for pourable products
Selective metal etching of two gold alloys on common surface for semiconductor contacts
Input method editor
Method and apparatus for treatment of sleep disorder breathing employing artificial neural network
Human test based on human conceptual capabilities
Heat dispersing method for IC of PC board and its device