The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 2009
Filed:
Jun. 29, 2005
Hidetoshi Okazaki, Minato-ku, JP;
Hidetoshi Okazaki, Minato-ku, JP;
Oki Semiconductor Co., Ltd., Tokyo, JP;
Abstract
An information processing apparatus has a resistance film type touch panel generating position coordinate data at a predetermined sampling interval, a liquid crystal display panel driven by a liquid crystal drive voltage, a first control circuit having a first generating circuit generating a horizontal synchronizing signal, a second generating circuit generating an alternating current signal for reversing the polarity of the liquid crystal drive voltage based on the horizontal synchronizing signal, and a third generating circuit generating a noise warning signal based on the horizontal synchronizing signal, the noise warning signal telling the interval at which the polarity of the liquid crystal drive voltage reverses; and a second control circuit changing the predetermined sampling interval based on the noise warning signal and detecting a position coordinate input from the resistance film type touch panel at the changed predetermined sampling interval.