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Driveway high brightness uniformity sidewalk high illumination uniformity led street light lens

A lens and illuminance technology, applied in the field of LED lighting, can solve the problems of high cost and low uniformity of sidewalk illuminance.

Active Publication Date: 2018-11-23
上海睿铄光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, LED road lamps often lead to low illumination uniformity of sidewalks due to the pursuit of higher brightness uniformity for traffic lanes.
Although two lamps can be used to meet the requirements of the brightness uniformity of the roadway and the illumination uniformity of the sidewalk, the cost will be relatively high

Method used

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  • Driveway high brightness uniformity sidewalk high illumination uniformity led street light lens
  • Driveway high brightness uniformity sidewalk high illumination uniformity led street light lens
  • Driveway high brightness uniformity sidewalk high illumination uniformity led street light lens

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Figure 1 ~ Figure 3 A schematic structural view of a preferred embodiment of the present invention is shown, wherein the lens 1 includes an outgoing surface 11 and an incident surface 12, and a light source (such as an LED light source) for illumination can be placed in the cavity defined by the incident surface 12. The outgoing surface 11 includes two parts, namely a curved surface 111 and a curved surface 112 , both of which are smooth free-form surfaces with respective curvatures, so the intersection of the two parts is not a smooth transition. In other words, for any point on the intersection line 100 of the curved surface 111 and the curved surface 112 , the tangent planes of the curved surface 111 and the curved surface 112 passing through the point do not coincide with each other. However, there is no essential difference from this embodiment by rounding the corners of the transition to make it a smooth transition.

[0031] Such as Figure 4 As shown, the lens...

Embodiment 2

[0040] Figure 8 with Figure 9A schematic structural view of another preferred embodiment of the present invention is shown, wherein the lens 2 includes an outgoing surface 21 and an incident surface 22, and a light source (such as an LED light source) for illumination can be placed in the cavity defined by the incident surface 22 . The exit surface 21 includes three parts, namely a curved surface 211 , a curved surface 212 and a curved surface 213 , which are smooth free-form surfaces with respective curvatures, so the intersections of the curved surface 211 with the curved surface 212 and the curved surface 213 are not smooth transitions. In other words, for any point on the intersection line 200 of the curved surface 211 and the curved surface 212, the tangent planes of the curved surface 211 and the curved surface 212 respectively passing through this point do not coincide with each other; for any point on the intersection line 201 of the curved surface 211 and the curve...

Embodiment 3

[0046] Figure 10 with Figure 11 A schematic structural view of yet another preferred embodiment of the present invention is shown, wherein the lens 3 includes an outgoing surface 31 and an incident surface 32, and a light source (such as an LED light source) for illumination can be placed in the cavity defined by the incident surface 32 . Different from Embodiments 1 and 2, in this embodiment, the incident surface 32 is divided into multiple regions, wherein the incident surface 32 includes three parts, namely curved surface 321, curved surface 322 and curved surface 323, and the three parts have their own curvatures. Smooth free-form surface, so the intersection of the three is not a smooth transition. Or in other words, for any point on the intersection line 300 of the curved surface 321 and the curved surface 322, the tangent planes of the curved surface 321 and the curved surface 322 respectively passing through this point do not overlap each other; for any point on th...

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Abstract

The invention discloses an LED street lamp lens high in traffic lane luminance uniformity and high in sidewalk luminance uniformity. The lens comprises an emitting plane and an incident plane, the emitting plane comprises two or more curved-surface areas, and the incident plane and the curved-surface areas are all free-form surfaces; the emitting plane is provided with a common point which is located in the different curved-surface areas simultaneously, and tangent planes, passing through the same common point, of the curved-surface areas containing the same common point do not coincide with one another. A lens is further disclosed. The lens comprises an emitting plane and an incident plane, the incident plane comprises two or more curved-surface areas, and the emitting plane and the curved-surface areas are all free-form surfaces; the incident plane is provided with a common point which is located in the different curved-surface areas simultaneously, and tangent planes, passing through the same common point, of the curved-surface areas containing the same common point do not coincide with one another.

Description

technical field [0001] The invention relates to the field of LED lighting, in particular to an LED street lamp lens with high luminance uniformity and sidewalk high illuminance uniformity for a driveway. Background technique [0002] In the 1990s and the beginning of this century, the light distribution of LED street lamps pursued high illuminance uniformity, but this kind of light distribution was found to have obvious brightness unevenness in practical applications, and the road will appear obvious "zebra pattern phenomenon" ". The fundamental reason is that the luminance coefficient values ​​at different positions on the road are different. The luminance coefficient value of the point under the lamp is relatively small, and the luminance coefficient value between two lights is relatively large. When the illuminance uniformity of the road surface is high, its brightness is uniform. is often low. [0003] In recent years, with the in-depth research on LED road lighting an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21V5/04F21W131/103F21Y115/10
CPCF21V5/04F21W2131/103
Inventor 吴柳燕
Owner 上海睿铄光电科技有限公司
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