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
Point-in-time copies in a cascade using maps and fdisks
Flash drive
Collaborative image capture
Controller for soldering iron
Computer system for routing package deliveries
Probe for ultrasound diagnostic apparatus
Use of endogenous promoters in genetic engineering of Nannochloropsis gaditana
  Randomly Featured Patents
Lithographic apparatus and device manufacturing method utilizing a flat panel display handler with conveyor device and substrate handler
Device and method for converting a low voltage signal into a high voltage signal
Amphipatic lipid dispersion
Image copier having enhanced duplex capabilities; method of printing a copy of a document to produce a duplex copy product
Sampling for database systems
Process for the acceptance of a virtual prepaid card use request permitting the reuse of its serial number
Infant incubator with non-contact sensing and monitoring
Dichroic dye composition, and liquid-crystal composition and liquid-crystal element including dichroic dye
Data photographic device for camera
Radio field intensity measurement device, and radio field intensity detector and game console using the same