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

Claim 17:
18. 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 arranged in a first direction and a second direction 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 the first pixels and upon a second region which is a part of the second pixels but not covering upon the unblocked pixels, wherein

the first region and the second region are symmetrically arranged in the first direction, and
an uncovered region of one first pixel is directly adjacent to an uncovered region of one second pixel in the first direction to enlarge a phase difference between light received by the one first pixel and light received by the one second pixel, and
uncovered regions of the one first pixel and the one second pixel are arranged to have a larger width in the second 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.