Automated calibration of LED luminaires based on color coordinates

1. A method of automatically calibrating a luminaire including at least one light emitting diode (LED) engine, the LED engine including a plurality of LEDs and a controller for driving the at least one LED engine, the method comprising:

acquiring an image of light emitted from each LED of the LED engine;

first determining whether each LED has a predetermined intensity for a color of the LED;

first adjusting each LED that does not have the predetermined intensity to have the predetermined intensity for the color of the LED;

measuring, by a spectrometer, a color spectrum of a combined light of the LED engine, the color spectrum including a plurality of measured color spectrums;

second determining whether a variation exists between each of the plurality of measured color spectrums and a predetermined color spectrum of a control data unit;

second adjusting at least one LED to correct any variation;

third determining at least one of a group consisting of a total area of a color spectrum for each color, a color coordinate, a correlated color temperature (CCT), a color rendering index (CRI) value, a lumen output value, a gamut value, an intensity of each color in a specific wavelength range, and a percentage of spectral content in the specific wavelength range for each color;

fourth determining whether a variation exists between the at least one of a group consisting of a total area of a color spectrum for each color, a color coordinate, a correlated color temperature (CCT), a color rendering index (CRI) value, a lumen output value, a gamut value, an intensity of each color in a specific wavelength range, and a percentage of spectral content in the specific wavelength range for each color and corresponding control data of a control data unit; and

third adjusting at least one LED to correct any variation.

2. The method of claim 1 , wherein the image acquiring includes using a camera.

3. The method of claim 1 , wherein the first adjusting includes using the controller to adjust the at least one LED engine.

4. The method of claim 1 , wherein the measuring, second determining, and second adjusting are repeated periodically for each LED.

5. The method of claim 1 , wherein the intensity and the percentage of spectral content are measured for light comprising a violet peak and a wavelength range of approximately 380 nanometers (nm) to 420 nm.

6. The method of claim 5 , wherein the specific wavelength range for each color further includes at least one of a group including: a red peak, a blue peak, a green peak, and an amber peak.

7. The method of claim 1 , wherein the combined light comprises: a white light comprising at least one of: a CRI value of more than approximately 50, and a CCT value between approximately 1000K and approximately 8000K; and wherein a portion of the LED engine excluding a violet peak comprises: an xy coordinate on a CIE 1931 xy color space diagram above a black body curve within a bounded area defined by y=2.23989x−0.382773, y=1.1551x−0.195082.

8. A calibration system comprising:

a computer including a memory, a processor, and an input/output (I/O);

an external I/O device in communication with the computer;

a storage system in communication with the computer, the storage system comprising a control data unit;

a calibration program code stored in the memory and configured to be executed by the processor;

an optical measurement device operably coupled to the processor;

a camera operably coupled to the processor; and

a controller for controlling each light emitting diode (LED) of a LED engine, and operably coupled to the processor,

the calibration program code configured to be executed by the processor to:

instruct the camera to acquire an image of light emitted from each LED of the LED engine;

first determine whether each LED has a predetermined intensity for a color of the LED;

first instruct the controller to adjust each LED that does not have the predetermined intensity to have the predetermined intensity for the color of the LED;

instruct the optical measurement device to measure a color spectrum of a combined light of the LED engine, the color spectrum including a plurality of measured color spectrums;

second determine whether a variation exists between each of the plurality of measured color spectrums and a predetermined color spectrum stored in a control data unit;

second instruct the controller to adjust at least one LED to correct any variation;

third determine at least one of a group consisting of a total area of a color spectrum for each color, a color coordinate, a correlated color temperature (CCT), a color rendering index (CRI) value, a lumen output value, a gamut value, an intensity of each color in a specific wavelength range, and a percentage of spectral content in the specific wavelength range for each color;

fourth determine whether a variation exists between the at least one of a group consisting of a total area of a color spectrum for each color, a color coordinate, a correlated color temperature (CCT), a color rendering index (CRI) value, a lumen output value, a gamut value, an intensity of each color in a specific wavelength range, and a percentage of spectral content in the specific wavelength range for each color and corresponding control data of a control data unit; and

third instruct the controller to adjust at least one LED to correct any variation.