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Lens for increasing spacing height ratio and improving illumination uniformity of light emitting diode (LED) lamp

A technology of uniform illumination of LED lamps, which is applied to components of lighting devices, lighting devices, lighting and heating equipment, etc. It can solve problems such as low lateral height ratio, eye glare, and LED lamps are difficult to meet the requirements, and achieve improvement. High distance-to-height ratio, high illumination uniformity, and improved light utilization

Active Publication Date: 2012-12-26
SHANGHAI SANSI ELECTRONICS ENG +3
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In low-level lighting, that is, when the height of the lamp pole where the LED lamp is installed is relatively low, it is required that the irradiation distance is relatively long and the illumination uniformity is relatively high. For example, for very wide road lighting, it is difficult for the current LED lamps to meet the requirements.
Because the current LED lamps have a relatively low lateral-to-height ratio, generally only 3:1 or lower, the installation of LED lamps with such a high light pole will not only cause serious glare to the driver's eyes, but also cause great safety hazards. , and the cost of light poles is higher

Method used

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  • Lens for increasing spacing height ratio and improving illumination uniformity of light emitting diode (LED) lamp
  • Lens for increasing spacing height ratio and improving illumination uniformity of light emitting diode (LED) lamp
  • Lens for increasing spacing height ratio and improving illumination uniformity of light emitting diode (LED) lamp

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Embodiment Construction

[0018] Figure 1 ~ Figure 4 As shown, the lens disclosed by the present invention to improve the aspect ratio and illuminance uniformity of LED lamps is composed of seven light-transmitting surfaces, in which the two ends of the first refracting surface 1 are respectively connected to the third refracting surface 3 and the sixth refracting surface 6, such as figure 2 On the cross-sectional view shown, the connection points are e and a respectively. The inner surfaces of the first refraction surface 1, the third refraction surface 3, and the sixth refraction surface 6 jointly constitute the incident surface of the lens, and the other ends of the third refraction surface 3 and the sixth refraction surface 6 are all located on the lens installation bottom surface 10, as figure 2 On the cross-sectional view shown, the endpoints are shown as c and h respectively. Both ends of the second refraction surface 2 are respectively connected to the fifth refraction surface 5 and the se...

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Abstract

The invention discloses a lens for increasing a spacing height ratio and improving the illumination uniformity of a light emitting diode (LED) lamp, which consists of seven transmission surfaces. The first, third and sixth refracting surfaces form the incident surface of the lens, and the second, fifth and seventh refracting surfaces form the emergent surface of the lens. Parallel light rays emitted from the second and fifth refracting surfaces are used for far-field small-angle illumination, and nonparallel light rays emitted from the seventh refracting surfaces are used for near-field wide-angle illumination. The lens provided by the invention can combine rear-field and near-field illumination and achieve high illumination uniformity, so that the lamp can be used at a high spacing height ratio without producing glare.

Description

technical field [0001] The invention relates to an optical element, in particular to a lens for improving the aspect ratio and illuminance uniformity of LED lamps. Background technique [0002] In some LED lighting applications, aspect ratio and illuminance uniformity are an important parameter to measure the lighting effect. The height ratio refers to the ratio of the distance between the lamps and the distance between the lamps and the illuminated surface. For example, in the application of road lighting, the ratio between the distance between two adjacent lamps along the road and the distance between the lamps and the road surface is Longitudinal aspect ratio, the ratio of the distance between two lamps installed on both sides of the road and the distance between the lamps and the road surface is the horizontal aspect ratio. In low-level lighting, that is, when the height of the lamp pole where the LED lamp is installed is relatively low, it is required that the irradiat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21V5/04F21Y101/02F21Y115/10
Inventor 周士康李晟王鹏
Owner SHANGHAI SANSI ELECTRONICS ENG
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