Depth pixel of three-dimensional image sensor and three-dimensional image sensor including the same

摘要

A depth pixel includes a photo detection unit, an ambient light removal current source, a driving transistor and a select transistor. The photo detection unit is configured to generate a light current based on a received light reflected from a subject, the received light including an ambient light component. The ambient light removal current source configured to generate a compensation current indicating the ambient light component in response to a power supply and at least one compensation control signal. The driving transistor is configured to amplify an effective voltage corresponding to the light current and the compensation current. The select transistor configured to output the amplified effective voltage in response to a selection signal, the amplified effective voltage indicating a depth of the subject.

主权项

1. A depth pixel comprising:
a photo detection unit configured to generate a light current based on a received light reflected from a subject, the received light including an ambient light component; an ambient light removal current source configured to generate a compensation current indicating the ambient light component in response to a power supply and at least one compensation control signal; a driving transistor configured to amplify an effective voltage corresponding to the light current and the compensation current; and a select transistor configured to output the amplified effective voltage in response to a selection signal, the amplified effective voltage indicating a depth of the subject.