Light-distributing lens and equipment for discrete LED (light-emitting diode) light source

Abstract

The invention relates to the field of LED (light-emitting diode) light source illumination, in particular to a light-distributing lens and equipment for a discrete LED light source. An incident plane of the lens comprises an incident side surface and an incident end surface; the incident end surface is a composite surface and comprises a main incident end surface and a sub incident end surface; the sub incident end surface comprises a center sub incident end surface and an off-axis sub incident end surface; the sub incident end surface is a curved surface protruding towards the bottom of the lens; the sub incident end surface is arranged on the main incident end surface. The lens is applied to the discrete LED light source; the sub incident end surface is correspondingly used with each sub light source in the light source; the sub incident end surface converts off-axis light emitted by a sub light source in an off-axis state into on-axis light or paraxial light of the sub incident end surface, wherein the off-axis light is relative to the middle axis of the lens, so that the light intensity of small-angle light can be effectively improved; secondary small-bump lens arrays with a dodging effect are densely distributed on the incident end surface, so that an ideal effect of the illumination light field of the discrete light source which is modulated by the lens is achieved.

Description

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

AI Technical Summary

Problems solved by technology

The commonality of these two methods is the discrete 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. In the case of high K value requirements, the arrangement of light sources will be obviously distributed in the lighting light 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 defects of uneven distribution of light field greatly limit the lighting effect of discrete light sources

Images