PHOTODIODE AND FILTER CONFIGURATION FOR HIGH DYNAMIC RANGE IMAGE SENSOR

摘要

An image sensor pixel includes a first photodiode, a second photodiode, a first microlens, a second microlens, and a filter. The first and second photodiode are disposed adjacent to each other in a semiconductor material. The first photodiode has a first full well capacity that is substantially equal to a second full well capacity of the second photodiode. The first microlens is disposed over the first photodiode and the second microlens is disposed over the second photodiode. The first microlens is substantially identical to the first microlens. The filter is disposed between the second microlens and the second photodiode to reduce an intensity of the image light incident upon the second photodiode. The filter does not substantially affect the image light directed toward the first photodiode.

主权项

1. An image sensor pixel for use in a high dynamic range image sensor, the image sensor pixel comprising:
a first photodiode disposed in a semiconductor material; a second photodiode disposed in the semiconductor material and having a second full well capacity substantially equal to a first full well capacity of the first photodiode, wherein the first photodiode is disposed adjacent to the second photodiode in the semiconductor material; a first microlens disposed over the first photodiode to direct image light toward the first photodiode; a second microlens disposed over the second photodiode to direct the image light toward the second photodiode, wherein the first microlens is substantially identical to the first microlens; and a filter disposed between the second microlens and the second photodiode to reduce an intensity of the image light incident upon the second photodiode, wherein the filter does not substantially affect the image light directed toward the first photodiode.