Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Touch pad










Image Number 11 for United States Patent #7411581.

A touch pad (101) includes transducers (201-204) for receiving acoustic signals resulting from touch events, such as the continuous movement of a fingertip across the surface (105) of the touch pad. The acoustic signals are acquired at different transducer locations in the surface. Signals from different transducers are combined, preferably in antiphase, to improve signal characteristics. The transducer signals are supplied to a stereo analogue to digital converter (407). Phase differences (706) are obtained and compared (703) with phase difference profiles (607) of known location, in order to identify the location of the touch event. An index (606) is used to identify candidate locations to reduce the amount of processing. Interpolation (705) is used to locate the touch event between profile locations.








 
 
  Recently Added Patents
Bessel beam plane illumination microscope
Conversion of 5-(chloromethyl)-2-furaldehyde into 5-methyl-2-furoic acid and derivatives thereof
Wearable display device
Tandem electric machine arrangement
Method for determining an object class of an object, from which light is emitted and/or reflected to a vehicle
Maize variety hybrid X13A495
Image decolorizing device
  Randomly Featured Patents
Advancing pen having individually capped cartridges
Wall structure for protection from ballistic projectiles
Generic proxy for representing search engine partner
Incandescent lamp having two lead-in conductors sealed within one end thereof
Power converter circuit and associated triggering method for generators with dynamically variable power output
Faucet
Memory system comprising blocks operable in parallel
Intense brightness optical system
Methods of integrated shielding into MTJ device for MRAM
Resilient pedestal wear plate