High-efficiency anti-glare led directional light based on positive and negative two-way Fresnel lens

Abstract

The invention discloses a high-light-efficiency and anti-dazzling LED directional lamp based on a forward Fresnel lens and a backward Fresnel lens. The LED directional lamp comprises an LED substrate, a reflector, the forward Fresnel lens and the backward Fresnel lens. The reflector is arranged on the LED substrate. The forward Fresnel lens is arranged in a cavity of the reflector. The forward Fresnel lens is installed at the bottom of the reflector. The backward Fresnel lens is arranged on the top of the reflector in a suspended and erected manner. The light emitting angle of a chip is divided into a ring belt part of 0 degree-gamma degrees and a ring belt part of gamma degrees-90 degrees with the geometric center of the LED substrate as a reference point. According to a suspension structure, the forward Fresnel lens is designed, the optical path is shortened, the light losses are reduced, the optical efficiency is improved by 5% and the central light strength is improved by 30%. In addition, the forward Fresnel lens and the backward Fresnel lens can achieve a light gathering effect, the function of improving the central light strength is achieved, and a high-power halogen lamp can be replaced.

Description

technical field [0001] The invention relates to the research field of LED light distribution, in particular to a high-efficiency anti-glare LED directional light based on a front and back bidirectional Fresnel lens. Background technique [0002] At present, the price of COB chips in the lighting industry at home and abroad remains high, and the medium-power chip module has become the favorite because of its low price. However, due to the relative independence of a single light source chip, PC lens design or aluminum-plated reflection is generally used in the secondary light distribution design. device, resulting in the following technical problems in the secondary light distribution of LED directional lights: 1. The medium-power chip module has low light efficiency and high energy consumption, and the power of replacing halogen lamps is generally low; 2. The uniformity of illumination in the secondary light distribution design difficult to control. Therefore, an anti-glare ...

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Problems solved by technology

[0002] At present, the price of COB chips in the lighting industry at home and abroad remains high, and the medium-power chip module has become the favorite because of its low price. However, due to the relative independence of a single light source chip, PC lens design or aluminum-plated reflection is generally used in the secondary light distribution design. device, resulting in the following technical problems in the secondary light distribution of LED directional lights: 1. The medium-power chip module has low light efficiency and high energy consumption, and the power of replacing halogen lamps is generally low; 2. The uniformity of illumination in the secondary light distribution design Difficult to control

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