Adaptive illumination for LED arrays
AssigneeLumileds Singapore Pte. Ltd.
InventorsRob Jacques Paul Engelen, Mehdi Aas
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Abstract
A structure and method of operating micro-LEDs are described. The micro-LEDs are arranged in a micro-LED array and have random orientations, distributions, and positions within the array. A lens array includes micro-lenses configured to capture light from the micro-LEDs. The micro-LED array structure is calibrated by capturing light from each of the micro-LEDs at different times and determining characteristics of the light from each of the micro-LEDs. Once image data of an image to be generated by the micro-LED array is received, a combination of the micro-LEDs to activate to produce the image, as well as the characteristics for driving the individual micro-LEDs is determined. The micro-LEDs are then activated to produce the image.
Claims17
A micro-light-emitting diode (LED) array system, the micro-LED array system comprising:
- a micro-LED array that includes a plurality of micro-LEDs, the micro-LEDs having random orientations, random distributions, and random positions;
- a lens array that includes a plurality of micro-lenses, the lens array configured to capture light from the micro-LEDs, each of the micro-lenses having at least one random characteristic including one or more of diameter, shape, focal length, pitch, or position;
- and
- a processor configured to:
- individually drive each of the micro-LEDs to generate an illumination profile;
- and
- determine which of the micro-LEDs to activate using a linear combination of the micro-LEDs based on matrix inversion.
A method of operating a micro-LED array, the method comprising:
- calibrating the micro-LED array by capturing light from a micro-LED array structure, the micro-LED array structure comprising a micro-LED array that includes a plurality of micro-LEDs having random orientations, random distributions, and random positions, and a lens array that includes a plurality of micro-lenses configured to capture light from the micro-LEDs, the calibration including capturing the light from each of the micro-LEDs at different times and determining characteristics of the light from each of the micro-LEDs;
- receiving image data of an image to be generated by the micro-LED array;
- determining which of the micro-LEDs to activate and characteristics of the activation to generate the image using a linear combination of the micro-LEDs based on matrix inversion;
- and
- activating the micro-LEDs to form the image.
A micro-light-emitting diode (LED) array system, the micro-LED array system comprising:
- a micro-LED array that includes a plurality of micro-LEDs arranged in cells, the micro-LEDs within each cell of the array having random orientations, and at least one of a random distribution or random position at predetermined locations;
- a lens array that includes a plurality of micro-lenses, the lens array configured to capture light from the micro-LEDs, each of the micro-lenses having at least one random characteristic including one or more of diameter, shape, focal length, pitch, or position;
- and
- a processor configured to generate an illumination profile via a determination of which of the micro-LEDs to activate using a linear combination of the micro-LEDs based on matrix inversion, wherein the processor is configured to determine a linear combination of the micro-LEDs for an arbitrary illumination profile based on a partial illumination component provided by each of the micro-LEDs.
Dependencies are inferred from the claim text.