Patent ID: 11917322
Assignee: PIXART IMAGING INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An optical module, comprising:
a light source;
multiple microlenses;
an optical sensor, configured to operate corresponding to the light source, and comprising:
a pixel matrix comprising a plurality of unblocked pixels, a plurality of first pixels and a plurality of second pixels, wherein each of the first pixels and the second pixels is aligned with and under one microlens among the multiple microlenses; and
an opaque layer covering upon a first region, which is a part of each first pixel, and upon a second region, which is a part of each second pixel, but not covering upon the unblocked pixels, wherein

the first region and the second region are symmetrically arranged in a first direction, and
uncovered regions of the first pixels and the second pixels are arranged to have a larger width in a second direction perpendicular to the first direction closer to a pixel edge in the first direction, and taper from both ends of the pixel edge toward a pixel center to improve accuracy of phase detection.