Osram 2020-06-2518 Jul 2020 09:44
Lighting Devices with Automatic Lighting Adjustment
[0006] In one implementation, the present disclosure is directed to a method of controlling a lighting device. The method includes receiving, at a processor, position sensor data, the position sensor data representing a position of at least one of a user's head and a user's eyes, determining, by the processor, whether the user is looking at a task area based on the position sensor data, and controlling, by the processor, an intensity of light emitted by the lighting device or turning the light on or off in response to determining whether the user is looking at the task area.
[0007] In some embodiments, the position sensor data is head position sensor data indicating a position of a user's head, and determining whether the user is looking at the task area includes calculating, by the processor, an angle of the user's head from the head position sensor data, and determining, by the processor, whether the calculated angle is within a first range of angles associated with the user looking at the task area. In some embodiments, the position sensor data is eye position sensor data indicating a position of a user's eyes, and determining whether the user is looking at the task area includes determining, by the processor, whether the eye position sensor data is within a first range of positions associated with the user looking at the task area. In some embodiments, the first range of positions are associated with the user looking through loupes. In some embodiments, the method further includes determining, by the processor, a location where the user is looking based on the eye position sensor data, and controlling, by the processor, a location of a beam of light emitted by the lighting device to be substantially coincident with the location where the user is looking. In some embodiments, the eye position sensor data is collected by an eye position sensor, and the method further includes pointing the lighting device at a first one of a plurality of targets, recording sensor data from the eye position sensor while a user is looking at the first one of the plurality of targets, and determining a set of calibrating parameters for translating a coordinate of the sensor data to a lighting device coordinate. In some embodiments, the set of calibration parameters are parameters of a two-dimensional linear approximation. In some embodiments, the set of calibration parameters represent a translation and a rotation of a coordinate system of the eye position sensor to a coordinate system of the lighting device.
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http://www.freepatentsonline.com/20200205268.pdf