US 12,230,621 B2
Optical navigation module performing lateral detection
Sai-Mun Lee, Penang (MY); and Lye-Pin Chu, Penang (MY)
Assigned to PIXART IMAGING INC., Hsin-Chu County (TW)
Filed by PixArt Imaging Inc., Hsin-Chu County (TW)
Filed on Jan. 29, 2024, as Appl. No. 18/424,903.
Application 18/424,903 is a continuation of application No. 17/344,144, filed on Jun. 10, 2021, granted, now 11,942,462.
Application 17/344,144 is a continuation of application No. 16/199,341, filed on Nov. 26, 2018, granted, now 11,063,028.
Application 16/199,341 is a continuation of application No. 14/712,012, filed on May 14, 2015, granted, now 10,192,856.
Claims priority of provisional application 62/097,725, filed on Dec. 30, 2014.
Prior Publication US 2024/0170466 A1, May 23, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01L 25/16 (2023.01); G06F 3/0354 (2013.01); G06F 3/042 (2006.01); H01L 27/146 (2006.01)
CPC H01L 25/167 (2013.01) [G06F 3/042 (2013.01); G06F 3/0354 (2013.01); H01L 27/14618 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical navigation module, comprising:
an optical package having a package surface, and comprising:
an image sensor arranged on the package surface; and
a light emitter arranged on the package surface and configured to emit illumination light upward; and
a reflective structure opposite to the optical package and comprising:
a detection plane perpendicular to the package surface of the optical package;
one detection opening at the detection plane;
a first reflective portion opposite to the image sensor and configured to reflect incident light coming from the one detection opening downward to impinge on the image sensor;
a second reflective portion having a first end configured to reflect the illumination light from the light emitter to go out the optical navigation module via the same one detection opening, and further having a second end extending toward the same one detection opening from the first end of the second reflective portion; 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 not reaching the detection plane.