Altis Law Group, Inc.
Scanning circuit and scanning method for keyboard
A scanning circuit includes n rows L1˜Ln, 2n columns P1-1˜P1-n and P2-1˜P2-n, and the n rows L1˜Ln and the n columns P1-1˜P1-n cooperatively form a switch matrix comprising n*n switches S1-1˜Sn-n, with ends of the switches in the same row electrically connected to one of n I/O ports K1˜Kn, respectively, the ends of the switches in the same column are electrically connected to ground via one resistor R1-1˜R1-n, respectively, each of resistors R2-1˜R2-n is electronically connected in one column of the columns P2-1˜P2-n, and connected between one of the I/O ports K1˜Kn and ground via one of the resistors R1-1˜R1-n, respectively. A keyboard and a scanning method are also provided.
Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd. Hon Hai Precision Industry Co., Ltd.
G H
G06F H03M
inventional inventional
Li-Sheng Lin-Kun Xiang-Ping Tsung-Jen Ren-Wen
Shu Ding Zhou Chuang Huang