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

Claim 0:
1. An optical sensing system, comprising:
a first light source configured to scan a horizontal detection area by emitting a horizontal linear light;
a second light source configured to scan a first vertical detection area by emitting a first vertical linear light, wherein the horizontal linear light is perpendicular to the first vertical linear light, and the first vertical detection area crosses a first portion of the horizontal detection area;
a light sensor; and
a processor configured to executing one or more of program codes, software modules and instructions recorded in a memory to:
control the first light source to scan the horizontal detection area by emitting the horizontal linear light;
control the light sensor to capture a first frame by receiving first reflective lights from the horizontal detection area;
process the first frame to obtain a first reflection pattern, and analyze 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, control the second light source to scan the first vertical detection area by emitting the first vertical linear light;
control the light sensor to capture a second frame by receiving second reflective lights from the first vertical detection area; and
process the second frame to obtain a second reflection pattern, and compare 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.