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
Electron-beam lithography method with correction of line ends by insertion of contrast patterns
Digital video disc player
Display panel and gate driving circuit and driving method for gate driving circuit
Indexing, relating and managing information about entities
Health monitoring of applications in a guest partition
Bandana
Display device substrate, method for manufacturing the same, display device, method for forming multi-layer wiring, and multi-layer wiring substrate
  Randomly Featured Patents
Transflective liquid crystal display panel
Method and apparatus for observing inside structures, and specimen holder
Axial angle disk
Basket wrapping material having bonding material thereon and method
Recovery of gold, silver and platinum group metals with various leachants at low pulp densities
Blood loss measurement
Device and method for non-occlusive localized drug delivery
Irrigation signalling device
Layered cracking catalyst and method of manufacture and use thereof
1:2 metal complexes of a disazo compound having a 5-hydroxy-1-(aminophenyl)pyrazole coupling/diazo component radical and disazo compound having a 1-amino-8-hydroxynaphthalene coupling/diazo