12-01-2012 дата публикации
Номер: US20120008032A1
A solid-state imaging apparatus includes a comparison section comparing a pixel signal from a pixel with a ramp signal and outputting a comparison signal. A measurement section starts counting in synchronism with the ramp signal and continues the counting until a signal supplied thereto reverses to measure comparison time. A comparator output controlling section interposed between the output of the comparison section and the input of the measurement section stops, if a pixel signal value exceeds a predetermined value determined based on a tanning phenomenon when the counting is started, the counting when the comparison signal is supplied to the measurement section to reverse the comparison signal, but supplies, if the pixel signal value does not exceed the predetermined value, a signal which is not reversed within a measurement period to the measurement section to continue the counting during the measurement period. 1. A solid-state imaging apparatus , comprising:a pixel adapted to convert charge obtained by photo-electric conversion by a photoelectric conversion element into a pixel signal having a voltage corresponding to the charge amount and output the pixel signal;a comparison section adapted to compare the pixel signal outputted from said pixel with a ramp signal which varies with respect to time and output a comparison signal;a measurement section adapted to start counting in synchronism with the ramp signal to continuously carry out the counting operation until a signal supplied to an input terminal thereof is reversed thereby to measure comparison time; anda comparator output controlling section interposed between an output terminal of said comparison section and the input terminal of said measurement section and adapted to receive the pixel signal as an input thereto;said comparator output controlling section being operable, if a value of the pixel signal exceeds a predetermined value determined based on a tanning phenomenon when the counting is started by ...
Подробнее