Patent ID: 8811810
Filing Date: 2014-08-19
Classification: H04N

Abstract:
1. A monitoring camera comprising: a light sensor for sensing an environment brightness of the monitoring camera and generating an induced current accordingly; a voltage comparing unit, electrically connected to the light sensor for generating a sensing voltage according to the induced current correspondingly and generating a first comparison result according to a comparison between the sensing voltage and a first reference voltage, so that the monitoring camera can determine whether to perform at least one of a plurality of mode switching operations according to the first comparison result; and a reference voltage generating unit for outputting the first reference voltage and determining whether to reduce the first reference voltage according to the first comparison result; wherein the mode switching operations comprise an IR emission operation, an IR-cut filter switching operation and a black/white image mode switching operation, and when the first comparison result indicates that the sensing voltage is lower than the first reference voltage, the monitoring camera performs one of the IR emission operation, the IR-cut filter switching operation and the black/white image mode switching operation accordingly, and the reference voltage generating unit reduces the first reference voltage, so as to form a second reference voltage.