A multi-order secondary light distribution lens and equipment for discrete LED light sources

Abstract

The invention relates to the field of an LED light source lighting, in particular to a multi-order secondary light distribution lens for a dispersed LED (Light Emitting Diode) light source and equipment. A lens incident plane comprises an incident side and an incident end plane, wherein the incident end plane is a composite surface and comprises a main incident end plane and a sub-incident end plane, the sub-incident end plane is arranged on the main incident end plane and is a hook face raised to the bottom direction of the lens, and the incident end plane comprises a central sub-incident end plane and an off-axis sub-incident end plane; the lens is applicable to the dispersed LED light source, and the sub-incident end plane is used corresponding to various sub-light sources in the light source; the sub-incident end plane is used for giving out and converting the sub-light sources in the off-axis states corresponding to an extra-axial light beam of a central axis of the lens into axial light or paraxial light of the incident end plane, therefore the light intensity of light rays with small angles can be effectively improved; furthermore, secondary small raised lens arrays which play a role in dodging can be densely distributed on the incident end plane, therefore the dispersed light source can achieve an ideal effect after the lighting light field is modulated by the lens.

Description

technical field [0001] The invention relates to the field of LED light source lighting, in particular to a multi-order secondary light distribution lens and equipment for discrete LED light sources. Background technique [0002] As an energy-saving lighting technology, LED lighting has entered people's lives in an all-round way. In actual production and use, the cost performance of LED lamps has become an increasingly prominent contradiction. Under the same power, the price of an integrated packaged COB light source is several times that of multiple individually packaged light sources, such as the widely used light source packaged in 3030EMC brackets. There is also a COB integrated package light source under the same power, and the light output efficiency of the light source with a large chip arrangement spacing is greater than that of a light source with a small arrangement spacing. Therefore, many lighting manufacturers are now trying to reduce the cost of light sources ...

AI Technical Summary

Problems solved by technology

The commonality of these two methods is the discrete development of the light source. If it is equipped with a conventional light distribution lens, it will present a spot distribution similar to that of the light source in the illumination light field, resulting in large spot defects, especially at small angles and high When the K value is required, the arrangement of light sources will be obviously distributed in the lighting field, which greatly affects the lighting effect

In existing applications, there is a method of attaching a small lens array to the end face of the entrance hole. Although this method can homogenize the distribution of the light field in a part of the frequency range, it cannot control the distribution of the illumination light field in each frequency range of the exit light field. The uniformity of the light field is improved. Such defects of uneven distribution of the light field greatly limit the lighting effect of the discrete light source. cost-integrated packaged light source

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