Patent ID: 9641779
Date: 2017-05-02
CPC Classifications: H04N

Claim:
1. A solid-state image sensing device comprising: a pixel circuit for outputting a voltage of a level corresponding to the illuminance; and an A/D converter for converting an output voltage of the pixel circuit into a digital signal, wherein the resolution on a low illuminance side is higher than the resolution on a high illuminance side in the A/D converter, wherein the solid-state image sensing device further comprises: wherein the A/D converter includes: wherein in the interval of the reference voltage on the low illuminance side is smaller than the interval of the reference voltage on the high illuminance side, and wherein the reference voltage generation circuit operates at a same clock frequency both on the low illuminance side and on the high illuminance side, therefore, a rate of change of the voltage per a predetermined time of the ramp wave signal on the low illuminance side is smaller than a rate of change of the voltage per the predetermined time of the ramp wave signal on the high illuminance side.