Patent ID: 7586523
Filing Date: 2009-09-08
Classification: H04N

Abstract:
1. A solid-state image sensing device comprising: a pixel section having cells arranged in a two-dimensional form of rows and columns on a semiconductor substrate, each of the cells including photoelectric converting means for converting an optical signal into an electrical signal, reading means for reading signal charges obtained by photoelectrically converting incident light by use of the photoelectric converting means and supplying the thus read signal charges to a detecting section, amplifying means for amplifying and outputting voltage corresponding to the signal charges accumulated in the detecting section and reset means for resetting the signal charges of the detecting section, an AD converting circuit configured to convert an analog signal output from the pixel section into a digital signal and output the thus converted digital signal, a line memory configured to store the digital signal output from the AD converting circuit, a control circuit configured to control the pixel section and AD converting circuit, subject a plurality of analog signals of different exposure times to AD conversion by use of the AD converting circuit and transfer the AD-converted signals to the line memory in a charge accumulation time period of one frame, and a synthesizing circuit configured to be supplied with a plurality of digital signals of different exposure times from the line memory, compare a first signal obtained by adding signals of short and long exposure times with a second signal obtained by amplifying the signal of short exposure time by a ratio of the signal of the short exposure time to the signal of long exposure time, select a larger one of the compared signals and output the selected signal.