Controlled lighting system
AssigneeLED Smart Inc.
InventorXinxin Shan
Life of this patent
Estimating the term…
Abstract
The combined color of a color tunable and intensity adjustable light source can be quantitatively described using the chromaticity diagram. With a preset color, or dominant wavelength, and daily light interval, the microprocessor in this plant growing system can compare the calculated chromaticity diagram data from the corresponding sensor with this preset color value and fine tune the combined color until these two are matched. The microprocessor then can control the lighting time according to daily light interval setting. The system can then automatically control the color and photon numbers. The same control method and algorithm can be used in general lighting system as well.
Claims17
A color tunable lighting system, comprising:
- a processor;
- one or more LED drivers, each of the one or more LED drivers driving one or more respective LEDs and connected to the processor to be controlled by the processor, the respective LEDs including at least two or more LEDs of different colors;
- a chromaticity sensor connected to the processor to send chromaticity information from the processor;
- the processor being connected to a non-transitory memory containing software instructions to cause the processor to control the one or more LED drivers according to the chromaticity information to adjust the at least two or more LEDs of different colors to cause the chromaticity information to approach a preset chromaticity.
A method of adjusting a horticultural lighting system including two or more LEDs of different colors to have a selected dominant or complementary wavelength, the method comprising the steps of:
- determining a curve in a chromaticity space obtainable by different ratios of brightness of the two or more LEDs of different colors;
- determining a point in the chromaticity space corresponding to the selected dominant or complementary wavelength;
- determining a line in the chromaticity space intersecting the point corresponding to the dominant or complementary wavelength and a white point;
- determining an intersection between the line in the chromaticity space and the curve in the chromaticity space to obtain a specific point in the chromaticity space;
- measuring a light output of the horticultural lighting system to compare a measured chromaticity of the light output to the specific point in the chromaticity space;
- and
- adjusting the brightness of the two or more LEDs to adjust the light output towards the specific point in the chromaticity space.
Dependencies are inferred from the claim text.