A light distribution lens for power LED lamps

Abstract

The invention discloses a grading lens used for a power type LED lamp and relates to a lens. Light of an existing power type LED can generate yellow circle at the light spot edge due to dispersion after passing the grading lens. The grading lens comprises a lens body, the upper surface of the lens body is a light emitting surface, and the lower surface of the lens is a recessed light incidence surface. The grading lens is characterized in that the light incidence surface is provided with a light mixing area, and light emitted by an LED chip is irradiated outside the lens after repeatedly reflected and refracted to mix light on the light incidence surface of the lens due to the action of patterns of the light mixing area. The light emitted by the LED is irradiated out of the lens after repeatedly reflected and refracted on the light incidence surface of the lens, and repeated reflection and refraction results in mixing of separated monochromatic lights of different refractive index, light mixing degree is improved, and the purpose for eliminating chromatic aberration is achieved, so that not only dispersion can be eliminated and the LED lens with large light emitting angle can be manufactured.

Description

technical field [0001] The invention relates to a lens, in particular to a light distribution lens for a power LED lamp. Background technique [0002] Since the advent of white LEDs, LEDs have begun to develop in the direction of lighting sources while being used as display devices. Because LED has a series of advantages such as environmental protection, high luminous efficiency, energy saving, and long life, it has been valued by the government and the lighting industry. Most occasions require hundreds, thousands or even tens of thousands of lumens of luminous flux, which has prompted the development of LEDs in the direction of high power. Whether it is a single-chip method or a chip combination method, it will eventually lead to an increase in the light-emitting area of ​​the light source. [0003] The light intensity distribution of the LED light source is usually Lambertian, which cannot meet the requirements of various applications. Therefore, lamps using LEDs as lig...

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Problems solved by technology

[0004] The existence of this phenomenon affects the lighting effect of LED lamps, especially in occasions that require high light quality, so it affects the promotion of LED lamp applications.

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