Patent ID: 11921253
Assignee: THE CHAMBERLAIN GROUP LLC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. A method of operating an obstacle detection system of a garage door operator, the method comprising:
causing a light emitter to emit a light signal across an opening associated with a garage door connected to the garage door operator;
narrowing a field of vision of a camera to a zone of interest associated with the light signal;
operating the camera to monitor the zone of interest;
determining whether the opening is obstructed based at least in part on whether the camera detects an object in the zone of interest;
stopping and/or reversing movement of the garage door in response to determining the opening is obstructed;
wherein causing the light emitter to emit the light signal comprises causing the light emitter to emit a light signal that forms light intensity arcs across the opening associated with the garage door; and
wherein narrowing the field of vision of the camera comprises:
identifying a center line that passes through apexes of the light intensity arcs; and
narrowing the field of vision of the camera to a zone of interest associated with the light signal by ignoring optical data beyond a certain number of pixels on either side of the center line.