Patent ID: 11921205
Assignee: PIXART IMAGING INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A method for eliminating misjudgment of reflective lights that is sensed by an optical sensing system, which includes a first light source, a second light source, a light sensor, and a processor, wherein the method being performed by the processor comprises:
controlling the first light source to scan a horizontal detection area by emitting a horizontal linear light, wherein the horizontal linear light is perpendicular to a first vertical linear light emitted by the second light source, and a first vertical detection area scanned by emitting the first vertical linear light crosses a first portion of the horizontal detection area;
controlling the light sensor to capture a first frame by receiving first reflective lights from the horizontal detection area;
processing the first frame to obtain a first reflection pattern, and analyzing the first reflection pattern to determine whether an object is within the first portion;
in response to determining that the object is within the first portion, controlling the second light source to scan the first vertical detection area by emitting the first vertical linear light;
controlling the light sensor to capture a second frame by receiving second reflective lights from the first vertical detection area; and
processing the second frame to obtain a second reflection pattern, and comparing the first reflection pattern with the second reflection pattern to determine whether the object detected by misjudgment caused by the first reflective lights is a fake object, so as to eliminate fake object misjudgment caused by the first reflective lights.