US Patent 10095910 Fingerprint identification circuit, touch apparatus and fingerprint identification method

A fingerprint identification circuit comprises multiple reading sub-circuits, and multiple fingerprint identification sub-circuits each column of fingerprint identification sub-circuits are connected with one reading sub-circuit, each fingerprint identification sub-circuit comprises a writing sub-circuit, a sensing sub-circuit and a output sub-circuit, the writing sub-circuit is connected with a scan signal input terminal; the sensing sub-circuit senses a fingerprint and transmits a sensing signal to the output sub-circuit; the output sub-circuit outputs the sensing signal upon the writing sub-circuit is turned off each fingerprint identification sub-circuit further comprises: a converting and amplifying sub-circuit provided between the sensing sub-circuit and the output sub-circuit, for converting the sensing signal into a current signal, amplifying the current signal and outputting it to the output sub-circuit, the reading sub-circuit is connected with the output sub-circuit for reading the sensing signal and converting the current signal into a voltage signal to output.