Uniform illuminating source and design method based on multiband LED (light emitting diode) array and diffuse reflection surface

An LED array, uniform lighting technology, applied in lighting and heating equipment, plane light sources, light sources, etc., can solve problems such as poor uniformity of radiation distribution on the illuminated plane

Active Publication Date: 2011-06-01
TIANJIN UNIV
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Problems solved by technology

But when the panel size of the LED is less than or equal to the distance between the illumination plane and the LED, the uniformity of the radiation distribution of the illumination plane is poor

Method used

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  • Uniform illuminating source and design method based on multiband LED (light emitting diode) array and diffuse reflection surface
  • Uniform illuminating source and design method based on multiband LED (light emitting diode) array and diffuse reflection surface
  • Uniform illuminating source and design method based on multiband LED (light emitting diode) array and diffuse reflection surface

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Embodiment Construction

[0052] Below in conjunction with accompanying drawing the present invention is described in detail as follows:

[0053] As shown in the figure, 1 ring-shaped bottom surface, 2 three-ring LED array, 3 hemispherical inner surface with high diffuse reflectivity, 4 circular hole for CCD image acquisition, 5 the bottom part of the outer surface, 6 the middle part of the outer surface , 7 the top part of the outer surface, 8 the threaded hole for fixing the light source, 9 the threaded hole on the outer surface for fixing the annular bottom surface and the outer surface, 10 the threaded hole on the annular bottom surface for fixing the annular bottom surface and the outer surface, 11 Threaded holes for securing the LED array.

[0054] The present invention consists of three parts, one part is the annular bottom surface 1 for placing the LED array, the second part is the LED array 2 with three annular LEDs distributed circularly, the third part is the hemispherical inner surface 3 sp...

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Abstract

The invention relates to an LED (light emitting diode) illuminating source, in particular to a uniform illuminating source and design method based on a multiband LED array and a diffuse reflection surface. A uniform illuminating source is designed with indirect illumination by applying the LED annular array and the diffuse reflection surface. The multiband LED array is distributed cyclically, the light of the LED is illuminated directly on a semispherical inner surface of high diffuse reflection from an annular bottom surface, and then is reflected on a target surface uniformly, so that uniform illumination is realized. According to the lambertian property of the LED and bidirectional distribution function of the diffuse reflection surface, a mathematical model of uniform illumination source is established. The uniform illumination source designed according to the invention can be used for a color vision detecting system, projection system and the like which require the multiband illumination. The uniformity of the degree of illumination is improved greatly, and a favorable color mixing effect is provided.

Description

technical field [0001] The present invention relates to LED lighting sources, in particular to a uniform lighting source and design method based on multi-band LED arrays and diffuse reflection surfaces, specifically a light source that mixes light emitted by light-emitting diodes (LEDs) of different bands to achieve uniform lighting. Background technique [0002] With the development of science and technology, LED is more and more widely used in fields that require uniform lighting conditions such as color vision due to its unique advantages in luminous efficiency, compactness, safety and stability. In a color vision system, the uniformity of illumination of the light source and the color of the light source will affect the resolution of the image and the contrast of the detection target. Kopparapu uses a simulated annealing algorithm to determine the position of the light source to obtain a uniform lighting environment for visual inspection. Therefore, it is very important...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21V19/00F21V7/00F21V7/22F21K9/20F21Y105/18F21Y115/10
Inventor 曲兴华祝振敏贾果欣
Owner TIANJIN UNIV
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