Wide-angle light-distribution lens for LEDs and application thereof

Abstract

The invention relates to a dedicated wide-angle light-distribution lens for LEDs (light-emitting diode). The lens is a rotating body, which comprises an incident plane and an exit plane, wherein a concave pit with the inner curved surface thereof being a rotary surface formed by rotating a smooth curve is arranged on the incident plane of the LED lens, the top part of the curved surface is in smooth transition and the LED is arranged in the concave pit; the exit plane is particularly a rotary surface in smooth transition; and the center of the LED lens is particularly a concave plane gradually bulging in outward transition and bending downwards at the edge. The invention solves the problem of light spots in LED illumination and achieves the application of illumination-grade high-power LEDs as light sources in the illumination of even surfaces; and the invention ensures the stable LED single-lamp performance, reduces the number of the LED single-lamp and ensures the long service life and good reliability of the system.

Description

Technical field: The invention relates to a lens, in particular to a wide-angle light distribution lens dedicated to LEDs. Background technique: As a green and energy-saving light source, LED light sources are gradually replacing traditional light sources in the field of lighting. Compared with low-power LEDs, high-power LEDs have higher luminous efficiency, better color rendering index, and more stable temperature and light decay characteristics. It is the mainstream direction of LED light sources for lighting, and it is also the mainstream direction of research and development by international LED manufacturers. However, due to the high brightness of a single high-power LED, it is currently mainly used in key lighting areas such as spotlights and road lighting. Floodlighting lamps for commercial or home use are still dominated by small and medium-power LEDs below 1 watt, such as 3528 and 5050. There are two main types of LED surface light source lighting: 1) Side-lig...

AI Technical Summary

Problems solved by technology

Its disadvantages are: 1. Low-power LEDs are usually non-illumination-level products, and their lifespan and reliability are poor; 2. To achieve the same surface light source lighting, the amount of low-power LEDs is about 20 times that of high-power LEDs, and the cost per unit luminous flux is relatively expensive.

The increase in the number of chips also further reduces the reliability of the system

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