Patent ID: 7646410
Filing Date: 2010-01-12
Classification: H04N

Abstract:
1. A solid-state image sensing device comprising: an Active Pixel Sensor (APS) array in which pixels are arranged in a two-dimensional matrix form, the APS array generating reset signals and video signals of respective columns in a selected row; a Correlated Double Sampling (CDS) unit receiving reset signals from neighboring columns of the same color, receiving video signals from pixels generating the reset signals, and generating modulation signals respectively corresponding to the differences between the reset signals and the video signals such that each of the modulation signals is activated according to activation of the previous modulation signal; and a digital signal output circuit generating a corresponding digital signal based on the instant of time when the logic state of the finally activated modulation signal among the modulation signals is changed, wherein the CDS unit generates a modulation signal of a column, which is activated when the difference between the reset signal and the video signal from the column reaches a reference level in response to a ramp signal, and generates a modulation signal of the next column having the same color as that of the column, which is activated when the difference of the reset signal and the video signal of the next column reaches the reference level in response to the ramp signal according to activation of the previously generated modulation signal.