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. 21, 2012
Filed:
Jun. 17, 2010
Lin-kun Ding, Shenzhen, CN;
Xiang-ping Zhou, Shenzhen, CN;
Ren-wen Huang, Shenzhen, CN;
Li-sheng Shu, Shenzhen, CN;
Tsung-jen Chuang, Taipei Hsien, TW;
Lin-Kun Ding, Shenzhen, CN;
Xiang-Ping Zhou, Shenzhen, CN;
Ren-Wen Huang, Shenzhen, CN;
Li-Sheng Shu, Shenzhen, CN;
Tsung-Jen Chuang, Taipei Hsien, TW;
Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Shenzhen, Guangdong Province, CN;
Hon Hai Precision Industry Co., Ltd., Tu-Cheng, New Taipei, TW;
Abstract
A scanning circuit includes n rows L˜Ln, 2n columns P-˜P-and P-˜P-, and the n rows L˜Ln and the n columns P-˜P-cooperatively form a switch matrix comprising n*n switches S-˜Sn-n, with ends of the switches in the same row electrically connected to one of n I/O ports K˜Kn, respectively, the ends of the switches in the same column are electrically connected to ground via one resistor R-˜R-, respectively, each of resistors R-˜R-is electronically connected in one column of the columns P-˜P-, and connected between one of the I/O ports K˜Kn and ground via one of the resistors R-˜R-, respectively. A keyboard and a scanning method are also provided.