A new type of secondary light distribution lens and equipment for discrete LED light sources

Abstract

The invention relates to the field of illumination of LED (light emitting diode) light sources, in particular to a novel secondary light distribution lens and novel secondary light distribution equipment for a discrete LED light source. An incident surface of the lens comprises an incident side surface and an incident end surface; the incident end surface is a composite surface which comprises a main incident end surface and secondary incident end surfaces; the secondary incident end surfaces are arranged on the main incident end surface; the secondary incident end surfaces and the main incident end surface are curved surfaces; the secondary incident end surfaces are projected towards the bottom of the lens; the lens is suitable for the discrete LED light source; the secondary incident end surfaces correspond to various secondary light sources in the light source; off-axis light rays which are emitted from the secondary light sources in an off-axis state relative to the axis in the lens are converted into on-axis light rays or paraxial light rays of secondary incident end surfaces by the secondary incident end surfaces, so that the light intensity of small-angle light rays can be improved effectively; secondary small-projection lens arrays which have a dodging effect are densely distributed on the incident end surface; and an illumination light field of which the discrete LED light source is modulated by the lens has a perfect effect.

Description

technical field [0001] The invention relates to the field of LED light source lighting, in particular to a novel 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 by usi...

AI Technical Summary

Problems solved by technology

The commonality of these two methods is the discrete scattered 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 with high K When the 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 light field distribution in a part of the high frequency range, it cannot effectively solve the problem that the light spots in the middle and low frequency range are distributed as light sources. Phenomenon, such non-uniform light field defects greatly limit the lighting effect of discrete light sources

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