One-step packaging LED (Light Emitting Diode) lens with free curve and design method of same

Abstract

The invention belongs to the field of optical lenses, and particularly relates to a one-step packaging LED (Light Emitting Diode) lens with a free curve and a design method of the same. The lens comprises a plane and the free curve, wherein the plane corresponds to an inner surface, and the free curve corresponds to an outer surface and is used for realizing uniform illumination and rectangular light distribution. When a light emitting surface of an LED chip emits light beams, the light beams are received by a primary lens after being refracted through the inner surface, and are emitted on a road surface through the free curve. The shape of the free curve is obtained through numerical solution based on the energy conservation law and the requirements for the illumination uniformity. As the one-step packaging lens comprises the free curve, all light emitted by LEDs can illuminate the road surface; thus, the utilization rate of the light beams is increased, and the 'zebra pattern effect' is avoided. When the lens is used, the uniform illumination can be realized through combining a plurality of packaged LEDs, the link of the secondary optical design is eliminated, and therefore, a lot of time is saved. The one-step LED light distributing lens is widely used, is suitable for all fields in need of uniform illumination, and has great social and economic benefits.

Description

technical field [0001] The invention belongs to the field of optical lenses, and in particular relates to an LED primary packaging free-form surface lens and a design method thereof. Background technique [0002] In recent years, with the development of semiconductor lighting technology, LED has been applied to many lighting fields, and LED street lamp is one of its applications. LED is being widely used due to its small size, high reliability, long life and good brightness adjustability. But now there is no corresponding standard for LED street lighting, and the quality of LED street lights on the market is also uneven, mainly reflected in the uneven illumination of the road surface and the phenomenon of zebras on the illuminated road surface. At present, LED street lamps mainly use secondary optical design on the basis of primary optical design, which leads to excess light energy loss, resulting in energy loss, and the light distribution effect is not ideal. [0003] In ...

AI Technical Summary

Problems solved by technology

However, due to the inconvenience of multiple LEDs in the design and use of lamps, a large number of series and parallel connections are required, and the stability of the light source is poor, which greatly restricts the structure and design of LED lamps. In addition, the light efficiency is also limited, making most The lamps and lanterns cannot meet the illuminance requirements and illuminance uniformity requirements required by "Urban Road Lighting"

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