Patent ID: 7619674
Filing Date: 2009-11-17
Classification: H04N

Abstract:
1. An apparatus for converting a real image into an electric signal, comprising: plural pixels, each for storing an integration time of a present frame that is estimated by the illumination of a prior frame; and control means for controlling the integration time of the present frame based on the stored integration time, wherein each pixel includes: a photodiode for receiving a light of a real image to generate a photo charge corresponding to the light; a transfer transistor for selectively transferring the photo charge; a junction capacitor for receiving the photo charge when the transfer transistor is turned on and, before receiving the photo charge, storing the integration time of the present frame; a reset transistor for receiving a first control signal having first and second predetermined voltage levels to reset the junction capacitor to the first predetermined voltage level or supply the second predetermined voltage level calculated based on the integration time to the junction capacitor in response to a reset signal; a drive transistor for outputting the electric signal corresponding to a charge amount transferred from the junction capacitor; and a select transistor for controlling a transmission of an electric signal outputted from the drive transistor.