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

Claim 10:
11. 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, as well as a plurality of first pixels and second pixels arranged at a part of pixel columns of the pixel matrix, 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 smaller than an area of covered first pixel, of each first pixel, and upon a second region, which is smaller than an area of covered second pixel, of each second pixel, but not covering upon the unblocked pixels, wherein

uncovered regions of one first pixel and one second pixel are symmetrically arranged and directly adjacent to each other in a first direction to enlarge a phase difference between light received by the one first pixel and light received by the one second pixel, and
the uncovered regions of the one first pixel and the one second pixel are arranged to have a larger width in a second direction, which is perpendicular to the first direction, closer to a pixel edge between the one first pixel and the one second pixel, and taper from the pixel edge respectively toward a pixel center of the one first pixel and a pixel center of the one second pixel.