A cob-type LED concentrating TIR lens system and its design method

Abstract

The invention relates to a COB type LED light gathering TIR lens system and a designing method thereof. The COB type LED light gathering TIR lens system and the designing method thereof are used in a multi-COB type LED light source to achieve the light gathering type light emitting effect. An optical system is mainly composed of a COB type LED light source and a free-form surface TIR lens, and is used for carrying out angle dividing control over the light emitted by the COB type LED light source. The optical system is designed based on the point light source approximation theory, the free-form surface discrete point of the TIR lens is calculated according to the iteration method, the user-defined collimation function suitable for the area source is compiled according to the macro language in the TracePro, the accent lighting of high evenness and chromaticity of the light area can be achieved by automatically adjusting original discrete point coordinates, the light gathering type light emitting effect is achieved, and the defects caused when an TIR lens designed in an original point light source system is directly applied to a COB type LED are overcome. Meanwhile, the Fresnel variant structure is applied to the outer surface of the top of an optimized lens, the thickness of the lens is reduced, cost is saved, and the lighting effect is improved.

Description

technical field [0001] The invention relates to an LED condensing lens, in particular to a multi-COB (chips on board) LED condensing TIR lens system and a design method for realizing the condensing output effect. It belongs to the technical field of green lighting. Background technique [0002] With the continuous development of semiconductor technology and the improvement of people's daily life, the requirements for the luminous flux of LED lamps are getting higher and higher, and low-power LED chips cannot meet the requirements. At present, the lighting fixtures on the market usually use the modularization of low-power LED chips to achieve the luminous flux up to the standard, but it is easy to cause problems such as uneven light color, glare and glare, and at the same time, it brings the disadvantage of excessive volume of the lamp. The chip-on-board (COB) technology just meets the requirements of high luminous flux, can effectively reduce the volume of the lamp, and res...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide a COB-type LED concentrating TIR lens system and design method, which can reasonably distribute the light energy twice, realize the key lighting with high uniformity and chromaticity in the lighting area, and solve the problem of TIR in the previous point light source system design. Defects and deficiencies when the lens directly uses COB LEDs

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