High-uniformity side-lit LED plant illumination light source without light guide plate

Abstract

The invention discloses a high-uniformity side-lit LED plant illumination light source without a light guide plate. The light source comprises a brightness enhancement film, a double-sided prism diffusion plate, area light source borders, RGB three-color LED lamp beads, PCB circuit boards, a light mixing hood, a reflection backplane, a condensing cup and condensing lenses; and a luminescence spectrum of a lamp can be regulated by multiple paths of PWM signals generated by an external driving circuit so as to meet demands of different plants for different spectra in different growth stages. TheRGB three-color LED lamp beads are sealed on the PCB circuit boards; the PCB circuit boards are mounted on the area light surface borders; the light mixing hood of which the surface is provided witha great amount of microstructures is mounted above the lamp beads; the condensing lenses are strip condensing plates of which both surfaces are provided with half-cylinders; the condensing lenses aremounted on the condensing cup; and by using the double-sided prism diffusion plate, a problem of serious Fresnel reflection generated due to an excessive grazing angle is solved. According to the high-uniformity side-lit LED plant illumination light source without the light guide plate, a heat dissipation effect of a plant growth lamp can be improved, light mixing uniformity of the plant growth lamp for multiple colors of light can be improved, and a light energy utilization rate of the plant growth lamp can be improved.

Description

technical field [0001] The invention relates to the field of plant lighting sources, in particular to a high-uniformity side-entry LED plant lighting source without a light guide plate. Background technique [0002] With the continuous acceleration of urbanization, the population density in developed areas is high, and land is increasingly scarce. Traditional agriculture cannot adapt to environmental changes and increasingly declining. In order to meet the food demand in developed areas, the establishment of plant factories to develop vertical farming and modern agriculture has become the general trend. Light is an essential element for plant growth. The practice of applying light radiation to plants during plant growth to shorten the plant growth cycle and improve the quality of plant products has been widely used in plant factories. With the advantages of controllable spectrum, narrow spectral range, energy saving and environmental protection, LED light source has incomp...

AI Technical Summary

Problems solved by technology

[0003] However, the plant lighting sources currently on the market generally have simple optical structures, mostly the optical structure of LED spotlights, the optical structure of LED advertising lights, and some simple array lamps.

Although this saves the design cost, it cannot meet the performance requirements of the plant factory for heat dissipation and uniformity of the light source due to the extensive structure.

At the same time, the utilization of light source light is not high, and the energy consumption is large

Traditional LED light sources are divided into direct-type LED surface light sources and side-type LED surface light sources according to the position of the light source. The side-type surface light source can be made very thin due to the use of optical components such as light guide plates. However, due to the light guide plate Introduced, the light efficiency is greatly reduced, and because the LED generates a lot of heat during the lighting process, the temperature in the narrow cavity of the side-in surface light source will be too high, which will cause the warping problem of the light guide plate, which will cause light The further decline of the efficiency, and with the aging of the light guide plate material, it will cause extinction of specific light-emitting wavelengths, these problems will affect the absorption of light by plants

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