Spectral feedback control method, controller and system for multi-channel LED light source
A LED light source and feedback control technology, which is applied in the field of LED lighting, can solve the problems that the mixed spectrum of multi-channel LED light source deviates from the target spectrum, lack of feedback control mechanism, etc., and achieve the effect of easy operation and stability
Active Publication Date: 2020-12-11
上海航旭机载电器有限公司
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[0004] The inventors found that the luminous spectrum of the LED light source will change to a certain extent with the change of junction temperature, aging and external environmental conditions, which will cause the mixed spectrum of the multi-channel LED light source to deviate from the originally designed target spectrum, and the existing multi-channel LED based The spectral matching and spectral optimization methods of light sources still lack a corresponding feedback control mechanism
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[0039] The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.
[0040] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
[0041] It should be noted that the terminology used herein is only for describing specific embodiments, and is not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.
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The disclosure provides a spectral feedback control method, controller and system for a multi-channel LED light source. Among them, the spectral feedback control method of the multi-channel LED light source includes: monitoring the actual spectrum emitted by the multi-channel LED light source, and obtaining the corresponding measurement spectrum S m (λ); Calculate and measure the spectrum S m (λ) and target spectrum S t The relative error ε(λ) between (λ), where the relative error ε(λ) is equal to the target spectrum S t (λ) and measured spectrum S m The difference between (λ) and the target spectrum S t (λ) ratio; λ represents the wavelength of visible light; according to the peak wavelength position p of each LED channel i Decompose ε(λ) to obtain the relative error ε(p i ); wherein, i represents the i-th LED channel; calculate the new driving value of each LED channel after compensation in turn; measure the compensated measurement spectrum, and repeat steps S2 to S4 for the measurement spectrum until the relative error ε(λ) is in The relative error at the peak wavelength position of each LED channel ε(p i ) satisfies |ε(p i )| <ε0, and finally obtain the measured spectrum after feedback processing.< / ε
Description
technical field [0001] The disclosure belongs to the field of LED lighting, and in particular relates to a spectral feedback control method, controller and system for a multi-channel LED light source. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] LED light sources have been widely used in many fields due to their advantages of greenness, energy saving, and longevity. In particular, their convenient dimming methods and narrow-band characteristics of the spectrum provide great convenience for combining multi-channel LEDs to obtain spectrum-tunable light sources. Spectrum, as the most essential characterization parameter of a light source, determines most of its lighting quality, such as correlated color temperature, color rendering, light effect, non-visual biological effects, etc. Therefore, the light source spectrum can be optimally de...
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IPC IPC(8): H05B45/22H05B44/00
CPCH05B45/20
Inventor 章夫正
Owner 上海航旭机载电器有限公司