Optical fingerprint sensing device

The invention provides an optical fingerprint sensing device which comprises a sensing pixel array and a processing circuit. The sensing pixel array comprises P * Q sensing pixel units. The sensing pixel units are arranged in a plurality of rows and a plurality of columns, and each sensing pixel unit correspondingly outputs a sensing signal. The processing circuit is coupled to the sensing pixel array and configures a plurality of gain parameters. The processing circuit generates a fingerprint image based on the sensing signal output by each sensing pixel unit and the gain parameters, whereinthe fingerprint image comprises M * N image pixels. Image pixels of the fingerprint image are respectively associated with the gain parameters. The processing circuit configures one of the gain parameters different from the other of the gain parameters. 本发明提出一种光学式指纹感测装置，其包括感测像素阵列与处理电路。感测像素阵列包括P*Q个感测像素单元。感测像素单元排列为多行与多列，各个感测像素单元对应输出一感测信号。处理电路耦接感测像素阵列，配置多个增益参数。处理电路基于各感测像素单元输出的感测信号与增益参数产生指纹图像，此指纹图像包括M*N个图像像素。指纹图像的图像像素分别关联于增益参