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. 04, 2012
Filed:
May. 17, 2010
Ren-wen Huang, Shenzhen, CN;
Jun Zhang, Shenzhen, CN;
Lin-kun Ding, Shenzhen, CN;
Tsung-jen Chuang, Taipei Hsien, TW;
Ren-Wen Huang, Shenzhen, CN;
Jun Zhang, Shenzhen, CN;
Lin-Kun Ding, 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 input ports K˜Kn arranged in n rows LLn; and m−2 output ports W(m−1) arranged in m columns P˜Pm. The n rows and the m columns define a switch matrix including n*m switches. Ends of the switches in the same row are connected to one of the n input ports KKn, respectively. The ends of the switches in the column Pare connected to ground. The ends of the switches in the same column of the columns PP(m−1) are connected to a power supply VCC via resistors RR(m−1) and the m−2 output ports WW(m−1), respectively. The ends of the switches in the columns Pm are connected to ground via a resistor Rs and the power supply VCC via the resistors RR(m−1) and diodes DD(m−1), respectively.