Equivalent LED light source establishing method

Abstract

The invention provides an equivalent LED light source establishing method. An implicit function relationship between the LED luminous intensity and the LED major parameters (such as insertion depth of a chip, refractive index of a surrounding filling material, absorption coefficient of the material, and thickness of a package lens) can be established by the prediction algorithm through measuring actual LED light distribution. Then, by assuming a set of initial LED model parameters, optical equivalent parameters can be found out by the global optimization algorithm on the basis of the implicit relationship between the LED luminous intensity and the LED major parameters; and by the optical equivalent parameters, an equivalent accurate LED light source model can be established. With the adoption of the method, the equivalent LED light source model extremely approximate to an actual light source can be established quickly and accurately, so that an equivalent accurate LED light source model can be obtained through an LED light source provided by any LED light source manufacturer by virtue of measuring the luminous intensity of the LED light source. The light source model can be used for the design of an illumination system.

Description

technical field [0001] The invention relates to creating an equivalent LED light source used in lighting system design, and belongs to the technical field of LED lighting. Background technique [0002] As a solid light source, LED has the advantages of low energy consumption, long life, small size, light weight, no radiation and no pollution, and has been widely used in various lighting. However, the light directly output by LED is Lambertian distribution, which is not suitable for direct lighting. A lighting system is needed to redistribute the light distribution, which is the so-called secondary light distribution design. When designing a lighting system using various software, it is first necessary to establish a model of the light source. Whether the LED light source model is created accurately will directly affect the performance of the designed lighting system. Therefore, an accurate light source model is necessary for high-end lighting system design. The light sour...

AI Technical Summary

Problems solved by technology

However, these parameters are not provided by the manufacturer to the lighting designer

There is no accurate LED light source model, which has a great impact on lighting design

[0003] The traditional method assumes that the LED light source model is a perfect Lambertian light source model. In fact, due to the error in the manufacturing process, the LED light source is not a perfect Lambertian light source, which will bring great errors to the design of the lighting system.

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