Patent ID: 11942462
Assignee: PIXART IMAGING INC.
Field: Computer technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 10:
11. An optical navigation module, comprising:
a substrate;
an optical package, comprising:
an image sensor arranged upon the substrate; and
a light emitting chip arranged upon the substrate and configured to emit illumination light; and

a reflective structure covering on the optical package and comprising:
a detection plane perpendicular to the substrate;
one detection opening at the detection plane;
a first reflective portion having a first end and a second end, wherein the first end of the first reflective portion is aligned with the image sensor and configured to reflect incident light directly coming from the one detection opening directly toward the image sensor, and the second end of the first reflective portion extends toward the one detection opening from the first end of the first reflective portion, wherein the incident light directly coming from the one detection opening is reflected once at the first end of the first reflective portion;
a second reflective portion having a first end and a second end, wherein the first end of the second reflective portion is aligned with the light emitting chip to reflect the illumination light directly from the light emitting chip to directly go out the same one detection opening, and the second end of the second reflective portion extends toward the same one detection opening from the first end of the second reflective portion, wherein the illumination light directly from the light emitting chip is reflected once at the first end of the second reflective portion and then directly goes out the same one detection opening; and
a wall extending toward the same one detection opening between the first reflective portion and the second reflective portion, wherein a front end of the wall is closer to the same one detection opening than the second ends of the first and second reflective portions but not reaching the same one detection opening.