Optical system for high-power LED traffic signal light

A traffic signal light and LED light source technology, which is applied in the field of traffic signal lights, can solve the problems of non-compliance with traffic signal light standards, etc., and achieve the effects of improving average trouble-free working time, convenient manufacture, and constant brightness

Active Publication Date: 2009-10-14
ZHEJIANG FUYANG XINYUAN TRAFFIC ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a single high-power LED is used as a light source, how to emit uniform light is a new problem. If it is not uniform light, the appearance of the traffic signal light will appear to be bright in the middle and darker as it goes outward. Compliant with traffic light standards

Method used

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  • Optical system for high-power LED traffic signal light
  • Optical system for high-power LED traffic signal light
  • Optical system for high-power LED traffic signal light

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A light system for high-power LED traffic lights, including a high-power LED light source 1, and also includes an aspheric concave lens 2, a Fresnel convex lens 3, the light emitted by the high-power LED light source 1 passes through the aspheric concave lens 2 to form light The disk is refracted to the Fresnel convex lens 3, and the Fresnel convex lens 3 refracts the optical disk into parallel light rays, wherein: the aspheric concave lens 2 and the Fresnel convex lens 3 are made of acrylic material, namely PMMA material Made by die-casting, the aspherical concave lens 2 mainly defocuses the 25-degree light emitted by the high-power LED lamp to the Fresnel lens to form a uniform circular spot, and the Fresnel convex lens has a surface Many helical tooth-shaped equidistant concentric circles are formed. The inclination on the helical teeth is proportional to the distance from the concentric circle to the center. The closer to the center of the circle, the smaller the inc...

Embodiment 2

[0028] Its basic structure is the same as that of Embodiment 1, and the difference is that the power of the high-power LED light source is 20W, and its luminous angle is about 35 degrees, and the focal length of the Fresnel convex lens 3 is 150mm, and the optical disc formed The diameter of the lens is 410mm, which just matches the Fresnel convex lens 3. The center point of the high-power LED light source is 150mm away from the light disc. Moreover, the refractive index of the light incident surface 22 and the light exit surface 21 is 1.8. And the angle α formed by the generatrix of the conical concave surface 222 and the centerline 4 of the aspheric concave lens 2 is 35°, the angle β formed by the generatrix of the conical concave surface 222 and the centerline 4 is 40°, and the aspheric concave lens 2 The angle γ formed by the generatrix and the central line 4 is 15°. The diameter of the left bottom surface of the aspheric concave lens 2 is 24mm, and the diameter of the bot...

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Abstract

The invention relates to an optical system for a high-power LED traffic signal light, comprising a high-power LED light source, an aspheric concave lens and a Fresnel lens. Lights emitted by the high-power LED light source form disc light spots through the aspheric concave lens to be refracted to the Fresnel lens, and the disc light spots are refracted to be parallel lights through the Fresnel lens to be emitted. According to the technical scheme, the high-power LED light source is combined with a lens optical system, and uniform light processing is carried out for the lights emitted by the high-power LED light source to form a surface light source, thereby the traffic signal light has the characteristics of low energy consumption, large visual angle, constant brightness, convenient manufacture, average faultless working time increase, and the like.

Description

technical field [0001] The invention belongs to the field of traffic signal lamps, in particular to a light system for high-power LED traffic signal lamps. Background technique [0002] In recent years, new materials and new technologies have been continuously applied in the field of road traffic, especially the wide application of light-emitting diodes (LEDs) in the field of road traffic is obvious to all. In 1999, some cities in my country began to try out road traffic lights with LED light sources. The light source of LED road traffic lights is composed of many low-power LEDs, which are arranged in corresponding patterns according to certain rules, so this type of product is a point light source rather than a surface light source. Because the traffic lights in the past are composed of LED arrays composed of series and parallel circuits. Damage to individual LEDs will cause several LED tubes to fail to light. It seriously affects the appearance of the whole lamp, and it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S8/00F21V5/04G08G1/095F21W111/02F21Y101/02F21Y115/10
Inventor 陈琳胡立平王军华占晓斌郭敏
Owner ZHEJIANG FUYANG XINYUAN TRAFFIC ELECTRONICS
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