Lighting devices with automatic lighting adjustment
Lighting systems and associated controls that can provide active control of lighting device settings, such as on/off, color, intensity, focal length, beam location, beam size and beam shape. In some examples, lighting systems may include eye tracking technology and sensor feedback for one or more lighting device settings and may be configured with depth perception and cavity or incision recognition capability through image or video processing.
1. A method of controlling a lighting device, comprising:
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, wherein the lighting device is dimmed or turned off when the user is not looking at the task area and the lighting device is brightened or turned on to illuminate the task area when the user is looking at the task area.
2. The method of claim 1 , wherein:
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 comprises:
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.
3. The method of claim 1 , wherein:
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 comprises:
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.
4. The method of claim 3 , wherein the first range of positions are associated with the user looking through loupes.
5. The method of claim 3 , further comprising:
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.
6. The method of claim 3 , wherein the eye position sensor data is collected by an eye position sensor, and the method further comprises:
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.
7. The method of claim 6 , wherein the set of calibration parameters are parameters of a two-dimensional linear approximation.
8. The method of claim 6 , wherein 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.
9. A lighting system, comprising:
a lighting device;
a position sensor; and
a processor coupled to the lighting device and position sensor configured to:
receive position sensor data from the position sensor, the position sensor data representing a position of at least one of a user's head and a user's eyes;
determine whether the user is looking at a task area based on the position sensor data; and
control an intensity of light emitted by the lighting device or turn the light on or off in response to determining whether the user is looking at the task area, wherein the lighting device is dimmed or turned off when the user is not looking at the task area and the lighting device is brightened or turned on to illuminate the task area when the user is looking at the task area.
10. The system of claim 9 , wherein:
the position sensor is a head position sensor;
the position sensor data indicates a position of a user's head; and
the processor is further configured to:
calculate an angle of the user's head from the position sensor data; and
determine whether the calculated angle is within a first range of angles associated with the user looking at the task area.
11. The system of claim 9 , wherein:
the position sensor is an eye position sensor;
the position sensor data indicates a position of a user's eyes; and
the processor is further configured to determine whether the position sensor data is within a first range of positions associated with the user looking at the task area.
12. The system of claim 11 , wherein the first range of positions are associated with the user looking through loupes.
13. The system of claim 11 , wherein the processor is further configured to:
determine a location where the user is looking based on the position sensor data; and
control a location of a beam of light emitted by the lighting device to be substantially coincident with the location where the user is looking.
14. The system of claim 11 , wherein the processor is further configured to:
point the lighting device at a first one of a plurality of targets;
record sensor data from the eye position sensor while a user is looking at the first one of the plurality of targets; and
determine a set of calibrating parameters for translating a coordinate of the sensor data to a lighting device coordinate.
15. The system of claim 14 , wherein the set of calibration parameters are parameters of a two-dimensional linear approximation.
16. The system of claim 14 , wherein 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.