Patent ID: 9635302
Date: 2017-04-25
CPC Classifications: G06K,H04N

Claim:
1. An active pixel sensor device comprising: an active pixel sensing array having a plurality of sensing pixels arranged in a form of an array, wherein each sensing pixel has a power terminal, and the sensing pixels are divided into at least one group; and a reading circuit comprising a second signal reading unit connected to the power terminals of the sensing pixels of the active pixel sensing array for detecting a current sum of the sensing pixels of the at least one group, wherein the current sum is output to the second signal reading unit via the power terminals, the second signal reading unit converts the current sum into an output voltage and outputs the output voltage as a measured value of optical sensing, and the second signal reading unit comprises: an operational amplifier having an inverting input terminal, a non-inverting input terminal, and an output terminal, wherein the inverting input terminal connects to the power terminals of the sensing pixels and the non-inverting input terminal connects to a reference voltage; and a resistor connected between the inverting input terminal and the output terminal of the operational amplifier.