US 2019/0098236 A1 · SOLID-STATE IMAGE PICKUP DEVICE AND ELECTRONIC APPARATUS

Abstract

The present disclosure relates to a solid-state image pickup device and an electronic apparatus that enable the performance of a logarithmic sensor in a solar-cell mode to improve. After Signal (S) is read, a P-phase signal (N) is read in a conducted state in which RST is ON, and a P-phase signal (N′) is read in a non-conducted state in which the RST is OFF. Thus, in a case where sufficient incident light illuminance is provided (Bright), S−N being the difference with respect to the P phase acquired in the conducted state in which the RST is ON, is selected and output. In a case where capacitance is insufficiently charged in a low-illuminance condition in which the incident light is less in amount (Dark), S−N′ being the difference with respect to the P phase acquired in the conducted state in which the RST is OFF, is selected and output. The present disclosure can be applied to, for example, a CMOS solid-state image pickup device used for an image pickup device, such as a camera.

Claims18

Dependent claims

A solid-state image pickup device comprising:

a plurality of unit pixels arranged regularly and two-dimensionally, each of the plurality of unit pixels including:
a photodiode including a first semiconductor region having a first conductivity type and a second semiconductor region having a second conductivity type, the second semiconductor region having majority carrier concentration higher than majority carrier concentration of the first semiconductor region, the second conductivity type being a conductivity type opposite to the first conductivity type;
a reset transistor configured to operate to reset the photodiode;
an amplifier transistor electrically connected to the second semiconductor region;
and
a signal line connected with the amplifier transistor directly or through an active terminal;
and
a driving circuit configured to drive each of the plurality of unit pixels such that a reset level corresponding to a signal level output to the signal line is acquired in two states being a conducted state and a non-conducted state of the reset transistor.

5 more elements

A solid-state image pickup device comprising:

a plurality of unit pixels arranged regularly and two-dimensionally, each of the plurality of unit pixels including:
a photodiode including a first semiconductor region having a first conductivity type and a second semiconductor region having a second conductivity type, the second semiconductor region having majority carrier concentration higher than majority carrier concentration of the first semiconductor region, the second conductivity type being a conductivity type opposite to the first conductivity type;
a reset transistor configured to operate to reset the photodiode;
two staged amplifier transistors electrically connected to the second semiconductor region;
a memory provided between the two staged amplifier transistors;
and
a selecting transistor connected with a rear-stage amplifier transistor and a signal line, the selecting transistor being configured to output data to the signal line in conduction;
and
a driving circuit configured to drive each of the plurality of unit pixels.

6 more elements

Dependencies are inferred from the claim text.

Solid-state image pickup device and electronic apparatus

Life of this patent

Solid-state image pickup device and electronic apparatus

Life of this patent

Abstract

Claims18