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:
Sep. 12, 2006
Filed:
Jul. 14, 2003
Yu-chun Peng, Tainan, TW;
Shao-chun Ho, Hsinchu, TW;
Hsi-cheng Yeh, Tauyuan, TW;
Chih-ming Hsu, Keelung, TW;
Yu-Chun Peng, Tainan, TW;
Shao-Chun Ho, Hsinchu, TW;
Hsi-Cheng Yeh, Tauyuan, TW;
Chih-Ming Hsu, Keelung, TW;
High Tech Computer Corp., Taoyuan, TW;
Abstract
A keypad device including a parallel/serial conversion device, a keypad module, and a controller coupled to the parallel/serial conversion device and the keypad module. The keys in the keypad module are arranged in parallel. After the key is triggered, an interrupt signal will be fed to the controller. On receiving the interrupt signal, the controller will feed a drive voltage to the keypad module generating a parallel signal therein. After causing the parallel/serial conversion device to read and store the parallel signal, the controller will be able to read the parallel signal serially by using the clock signals. The status of the keypad module can thereby be obtained.