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

Claim 15:
16. An optical navigation module, comprising:
an optical package having a package surface, and comprising
an image sensor arranged on the package surface;
a light emitting chip arranged on the package surface and configured to emit illumination light upward; and

a reflective structure covering on the optical package and comprising:
a detection plane perpendicular to the package surface;
a first detection opening and a second detection opening at the detection plane;
a first reflective portion having a first end configured to reflect incident light coming from the first detection opening downward to impinge on the image sensor, and further having a second end extending toward the first detection opening from the first end of the first reflective portion;
a second reflective portion having a first end configured to reflect the illumination light emitted by the light emitting chip to go out the reflective structure via the second detection opening, and further having a second end extending toward the second detection opening from the first end of the second reflective portion; and
a wall extending toward the detection opening between the first reflective portion and the second reflective portion, wherein the first reflective portion is connected to one side of the wall and the second reflective portion is connected to a side opposite to the one side of the wall, and
a front end of the wall is a tapered end and not connected to the detection plane.