Large-angle lens and large-angle light-emergent LED (Light Emitting Diode) light source module

Abstract

The invention discloses a large-angle LED (Light Emitting Diode) lens, comprising a main body, wherein the lower end of the main body is provided with an opening, the main body is shell-shaped and is provided with light-incident surfaces and light-emergent surfaces; the light-incident surfaces are symmetrically arranged around the central axis of the main body, and are positioned at the inner sides of the main body; the light-emergent surfaces are arranged at the outer side of the main body; the light-incident surfaces are light-transmitting concave surfaces; the light-emergent surfaces are light-transmitting convex surfaces; the maximum thickness d1 of the lower part of the main body and the minimum thickness d2 of the top part of the main body meet the condition that d1 / d2 is more than 4 and less than 6; the concave depth h1 of each light-transmitting concave surface and the minimum thickness d2 of the top part of the main body meet the relation: h1 is more than 4*d2; and the convex height h2 of the light-transmitting convex surface and the minimum thickness d2 of the top part of the main body meet the relation: h2 is more than 5*d2. The large-angle LED lens disclosed by the invention has the advantages that the light beam angle of the large-angle lens is converted to be larger than 130 degrees so as to realize large-angle illumination and simultaneously improve the illumination uniformity; and due to the design with the light-transmitting concave surfaces and the light-transmitting convex surfaces, the total reflection probability of light is reduced to be lowest, so that the enlarging of the light-emergent angle is ensured, simultaneously, the efficiency of the lens is also enabled to be 90%, and the light utilization rate is furthest increased. The invention also discloses a large-angle light-emergent LED light source module.

Description

technical field [0001] The invention relates to the technical field of LED packaging, in particular to a large-angle lens and an LED light source module equipped with the large-angle lens and emitting light at a large angle. Background technique [0002] Due to its small size, low power consumption, long service life, high brightness, low heat and many other advantages, LED light source has been widely concerned and applied by people. Based on this, LED light source technology has also been developed rapidly. People are committed to Improve various performances of LED light source through technical improvement. [0003] The light distribution curve of the LED light source roughly conforms to the Lambertian distribution, and its beam angle is about 110-120 degrees, which can be used in general lighting occasions, but the beam angle is not large enough, and the light energy utilization efficiency is not high. In order to solve this technical problem, people use a secondary li...

AI Technical Summary

Problems solved by technology

The existing lens technology is not ideal for the distribution and utilization of light energy. It can be seen that how to optimize the design of the incident surface and the exit surface of the lens and further improve the light exit angle of the lens is a technical problem that needs to be solved in this field.

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