公开(公告)号：US10325138B2

公开(公告)日：2019-06-18

申请号：US15392242

申请日：2016-12-28

Applicant: Samsung Electronics Co., Ltd.

Inventor： Sun Kwon Kim ,  Choong Hoon Lee ,  Yun Jeong Kim

IPC: G06K9/00

Abstract: A unit pixel of a fingerprint sensor is provided. The unit pixel includes a sensing electrode located to form a capacitance with an object touching a touch surface, a first switch connected between a first node and a second node to transmit at least one driving voltage input through the second node, the first node connected to the sensing electrode, the switch configured to the sensing electrode, an amplifier configured to receive a signal from the sensing electrode and amplify the signal, and a first capacitor connected between a first input terminal and an output terminal of the amplifier, the first capacitor configured to transmit the signal from the sensing electrode to the output terminal. The amplifier is configured to output a different output voltage according to the at least one driving based on an operation of the first switch.