Design method of free-form surface reflector for LED automobile rear fog lamp

A technology of curved reflectors and design methods, which can be applied to reflectors, vehicle components, lighting and heating equipment, etc., and can solve problems such as poor lighting effects, low utilization of light energy, and impact

Active Publication Date: 2016-03-02
ZHONGSHAN INST OF MODERN IND TECH SOUTH CHINA UNIV OF TECH
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Problems solved by technology

The direct light energy utilization rate is high, the structure is simple, and it is easy to design, but the light source can be seen directly, so the lighting effect is not good, and the direct light source is easy to affect the people behind the car
The transmission t

Method used

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  • Design method of free-form surface reflector for LED automobile rear fog lamp
  • Design method of free-form surface reflector for LED automobile rear fog lamp
  • Design method of free-form surface reflector for LED automobile rear fog lamp

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Embodiment Construction

[0039] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be pointed out that, unless there is no specific detailed description of the following processes, those skilled in the art can refer to the prior art.

[0040] 1. Establish a coordinate system and set initial conditions

[0041] Such as figure 1 As shown, the center of the LED light-emitting surface 101 is the coordinate origin O, the plane where the light-emitting surface is located is the XOY plane, and the light-emitting direction of the LED light source is the positive semi-axis of the z-axis to establish a three-dimensional spatial coordinate system. The plane that intersects with the Y axis at o and is parallel to the plane XOZ is the target lighting surface 200 , and point o is the center point of the target lighting surface. Such as figure 2 As shown, α is the angle between the plane formed by the outgoing light 102 of the ...

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Abstract

The invention provides a design method of a free-form surface reflector for an LED automobile rear fog lamp. The design method comprises the following steps: initial conditions are set, and a target lighting region is uniformly divided; a light source solid angle is divided, and a mapping relation is established according to the energy conservation law; discrete point coordinates of the free-form surface reflector are calculated; and discrete ordinate points are fitted into a curved surface by utilizing mechanical modeling software. According to the design method provided by the invention, the size of the free-form surface reflector is small, the glare effect is low as a light emitting surface of a light source is vertically installed upwards, and meanwhile, the light distribution requirements of national standard GB 11554-2008 for the LED automobile rear fog lamp can be met. According to the technical scheme provided by the invention, the light emitting surface of the light source emits lights upwards perpendicular to the optical axis direction and the light is reflected by the free-form surface reflector, and finally, the light emerges onto a lighting surface; and the free-form surface reflector has the advantages of symmetry, simple design and high efficiency.

Description

technical field [0001] The invention relates to the field of LED lighting optical system design, in particular to a design method for a free-form reflector of an LED automobile rear fog light optical system. Background technique [0002] Compared with traditional light sources, LED light sources have the advantages of small size, low heat consumption, energy saving and environmental protection, and good uniformity. Using cold light-emitting technology, they have good color rendering and no flicker. In recent years, with the reduction of LED manufacturing costs and the continuous improvement of application technology, LEDs have become more and more widely used in vehicle lighting. LED car lights will be the development trend of vehicle lighting applications in the future. [0003] According to the national standard GB11554-2008 on the light distribution requirements of automotive LED rear fog lamps, a specific illuminance requirement must be met within a diamond-shaped range ...

Claims

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Application Information

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IPC IPC(8): F21V7/04F21S8/10F21W101/14F21Y115/10
CPCF21S43/14F21S43/31F21W2103/00
Inventor 葛鹏寇灵梅陈诗阳李秀丰王洪
Owner ZHONGSHAN INST OF MODERN IND TECH SOUTH CHINA UNIV OF TECH
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