Optical sensing device and method thereof

Abstract

An optical sensing device, including a first power rail, a second power rail, and a plurality of optical sensing elements arranged in an array, is provided. Each optical sensing element can include a photo diode, a reset switch, and a buffer. The reset switch can have a control terminal to receive a reset signal. A first terminal of the reset switch can be coupled to the first power rail and a second terminal of the reset switch is coupled to the photo diode. A first terminal of the buffer can be coupled to the second power rail, a second terminal of the buffer can be coupled to the second terminal of the reset switch and the photo diode, and a third terminal of the buffer is configured to provide a sensing signal. The second power rail is separate or independent from the first power rail.

Dependencies are inferred from the claim text.