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
Systems and methods for implementing real estate future market value insurance
Directed assembly of a conducting polymer
Failure recovery memory devices and methods
Catalyst composition and its use thereof in aromatics alkylation
Providing enhanced content
Display device capable of switching gate high voltage
Method of determining focus and dose of an apparatus of optical micro-lithography
  Randomly Featured Patents
Methods and systems for redirecting data
Treatment of diseases by site-specific instillation of cells or site-specific transformation of cells and kits therefor
Semiconductor integrated circuit device including a negative power supply circuit
Determining speed-of-sound factors in ultrasound images of a body
High electron mobility transistor
Data storage system and method
Method of forming a flexible graphite composite sheet
Volume charge density measuring system
Cab for construction machinery
FPGA configuration bitstream encryption using modified key