Patent ID: 7929856
Filing Date: 2011-04-19
Classification: H04N

Abstract:
1. An imaging system comprising: a charge coupled device image sensor; an exposure measure unit configured for metering light incident on the charge coupled device image sensor and determining a theoretic exposure time which is suitable for current ambient light conditions; an exposure control unit configured for controlling the charge coupled device image sensor to expose itself to the light incident thereon for a real exposure time, according to the determined theoretic exposure time, to capture an image signal; an exposure unit including a mechanical shutter, the mechanical shutter being configured for exposing the charge coupled device image sensor to the incident light for the real exposure time and blocking the incident light after the real exposure time elapses; and a signal adjusting unit for adjusting the captured image signal according to a ratio of the theoretic exposure time to the real exposure time; wherein the exposure control unit is configured for storing a plurality of control settings each of which associates a theoretic exposure time with a real exposure time and a ratio therebetween, and the exposure control unit being capable of automatically determining the real exposure time and the ratio.