Alton Harkcom Phones & Addresses
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Newnan, GA
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103 Cheek Rd, Gray Court, SC 29645 (864) 876-9929
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120 Santolina Park, Peachtree City, GA 30269 (770) 486-9214
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Union City, GA
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120 Santolina Park, Peachtree Cty, GA 30269
Emails
h***m@earthlink.net
Publications
Us Patents
Touch And Proximity Sensor Control Systems And Methods With Improved Signal And Noise Differentiation
View pageUS Patent:
20040056845, Mar 25, 2004
Filed:
Jul 16, 2003
Appl. No.:
10/620841
Inventors:
Alton Harkcom - Peachtree City GA, US
David Dettweiler - Newnan GA, US
David Dettweiler - Newnan GA, US
International Classification:
G09G005/00
US Classification:
345/173000
Abstract:
The present invention discloses a novel new technique for detecting an intended activation of a touch sensor in the presence of noise. An algorithm is described that compares a cumulative deviation of a touch sensor reading to a scale to obtain a ratio expressed as a percentage. The percentage is compared against a target threshold and the period required to reach the threshold is examined to determine whether the rise or fall in touch sensor readings is attributable to a touch or to system noise. Additional disclosed embodiments describe circuits configured to operate in a noisy environment and have touch sensors arranged as arrays that are capable of detecting a direction and speed of a human-like contact.