US 9,541,386 B2 · Distance measurement device and distance measurement system

Abstract

A distance measurement device with high detection accuracy. The distance measurement device includes a photosensor including a light-receiving element, a first transistor, and a second transistor; a wiring; a signal line; and a power supply line. The wiring is electrically connected to one electrode of the light-receiving element. The signal line is electrically connected to a gate electrode of the first transistor. The power supply line is electrically connected to one of a source electrode and a drain electrode of the second transistor. One of a source electrode and a drain electrode of the first transistor is electrically connected to a gate electrode of the second transistor. The other of the source electrode and the drain electrode of the first transistor is electrically connected to the other electrode of the light-receiving element and the other of the source electrode and the drain electrode of the second transistor.

Claims18

Dependent claims

A semiconductor device comprising:

a first photosensor comprising a first light-receiving element, a first transistor, and a second transistor,
wherein a first electrode of the first light-receiving element is directly connected to a first terminal of the first transistor and a first terminal of the second transistor, and
wherein a gate electrode of the first transistor is directly connected to a second terminal of the second transistor.

A semiconductor device comprising:

a first photosensor comprising a first light-receiving element, a second transistor, and a third transistor;
and
a second photosensor comprising a second light-receiving element, a fourth transistor, a fifth transistor, and a sixth transistor,
wherein a first electrode of the first light-receiving element is electrically connected to a first terminal of the second transistor,
wherein a second terminal of the second transistor is electrically connected to a gate electrode of the third transistor,
wherein a first electrode of the second light-receiving element is directly connected to a first terminal of the fourth transistor and a first terminal of the fifth transistor,
wherein a gate electrode of the fourth transistor is directly connected to a second terminal of the fifth transistor and a gate electrode of the sixth transistor, and
wherein the first light-receiving element overlaps with the second light-receiving element.

5 more elements

Dependencies are inferred from the claim text.

Distance measurement device and distance measurement system

Life of this patent

Distance measurement device and distance measurement system

Life of this patent

Abstract

Claims18