LAWRENCE SCOTT BARRAS
Pilots at Delynn Way, San Jose, CA
License number
California A2436507
Issued Date
May 2015
Expiration Date
May 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
1138 Delynn Way, San Jose, CA 95125
Professional information
Touchscreen With Z-Velocity Enhancement
US Patent:
2011005, Mar 10, 2011
Filed:
Sep 8, 2010
Appl. No.:
12/877776
Inventors:
Lawrence Scott Barras - San Jose CA, US
Kenneth James Albanowski - Fremont CA, US
Thomas David Hughes - Champaign IL, US
Kenneth James Albanowski - Fremont CA, US
Thomas David Hughes - Champaign IL, US
Assignee:
PALM, INC. - Sunnyvale CA
International Classification:
H04M 1/00, G06F 3/041
US Classification:
455566, 345173
Abstract:
A system and a method are disclosed for detecting an interaction, such as physical contact, with a touch-sensitive screen. The screen comprises a plurality of cells each associated with a signal value, such as a capacitance, that is modified based on the proximity of an object to the screen. During a first time interval, a first signal value associated with a cell is captured and during a second time interval a second signal value associated with the cell is captured. A difference is computed by subtracting the second signal value from the first signal value. The difference is used to classify the proximity of the object to the screen. For example, the object is classified as approaching the screen if the difference is positive and non-zero or the object is classified as moving away from the screen if the difference is negative and non-zero.