CN201779594U

CN201779594U - Novel LED (light-emitting diode) tunnel lamp reflection shield

Info

Publication number: CN201779594U
Application number: CN2009202111075U
Authority: CN
Inventors: 闫明; 王全国; 贾瑞红
Original assignee: Shanghai Caihuang Optoelectronics Technology Co Ltd
Current assignee: Shanghai Caihuang Optoelectronics Technology Co Ltd
Priority date: 2009-10-22
Filing date: 2009-10-22
Publication date: 2011-03-30
Anticipated expiration: 2019-10-22

Abstract

The utility model provides a novel LED (light-emitting diode) tunnel lamp reflection shield, which relates to a light distribution scheme with good lighting effect, high lighting uniformity degree and high luminous flux utilization ratio, thus being capable of being well applied to tunnel lighting. The reflection shield adopts a combination mode of a partial elliptic surface (about one half) and a partial parabolic surface: in the road length direction, the partial elliptic surface faces towards the interior, the partial parabolic surface faces towards the exterior, and the elliptic surface and the parabolic surface are symmetrically arranged; and in the road width direction, the partial elliptic surface faces towards the bottom, and the partial parabolic surface faces towards the top. In the utility model, a light source is placed on a focal point of the elliptic surface, and controlled light passes through the other focal point of the elliptic surface after being reflected; the light source is placed between the focal point and a vertex of the parabolic surface, and light shows a regular divergent condition after being reflected; and the reflection shield is applied to the LED light source with a beam angle at 60-160 degrees. The reflection shield is made of engineering plastics ABS (acrylonitrile butadiene styrene) or an aluminum alloy, is subject to surface finish and is plated with high-purity aluminum.

Description

The Novel LED tunnel lamp reflection shield

Technical field

The utility model relates to a kind of luminous intensity distribution technology of LED lighting, especially relates to the reflection shield structure of a kind of LED tunnel light fixture.

Background technology

Illumination in the tunnel is because of the variation of dark surrounds on daytime, and the uniformity of lamp lighting luminous intensity distribution should improve as much as possible, to guarantee the visual level of comfort of driver.The high power LED tunnel lamp tool of present most of enterprises adopts reflection shield to carry out secondary light-distribution.Common reflection shield structure is faced directly by four and is surrounded, only face directly light source is played constraint light beam angle, luminous intensity distribution is not played substantial change, can not make light reflex to predetermined position, road surface gets on, do not make full use of light, thereby cause the uniformity of light fixture relatively poor, do can not get good luminous intensity distribution like this.

The utility model content

The utility model is at above-mentioned deficiency of the prior art, and a kind of good illumination effect, uniformity of illuminance height, luminous intensity distribution scheme that the luminous flux utilization rate is high are provided, can applications well in tunnel illumination.

Described utility model solves the technical scheme that its technical problem adopts: the mode that reflection shield adopts part elliptic surface (making an appointment with half) to combine with part parabolic profile, be characterized in: the road length direction, the part elliptic surface is inner, part parabolic profile is outer, symmetric arrangement, its objective is: uncontrollable light shines directly into the road surface, and controllable light shines the weak place of uncontrollable light light of going to superpose, road surface, thereby makes illumination even; The direction of having a lot of social connections, part elliptic surface are by down, and part parabolic profile is by last, and its purpose is equally: uncontrollable light shines directly into the road surface, and controllable light shines the weak place of uncontrollable light light of going to superpose, road surface, thereby makes illumination even.

Described parabolic profile and elliptic surface are such to the control of light: light source is placed on the focus of elliptic surface, after reflection, controllable light must be through another focus of elliptic surface, arrive ground then, the angle of controlled light and illumination can be calculated, and choose suitable ellipsoid equation parameter and reach this purpose; Light source is placed between the focus and summit of parabolic profile, and after reflection, light is the situation of clocklike dispersing, and arrives ground then, and the angle of same controlled light and illumination can be calculated, and chooses suitable parabolic profile equation parameter and reaches this purpose.

Described reflection shield is applied to the led light source between the beam angle 60-160 degree.

Described reflection shield material is engineering plastics ABS or aluminium alloy, surface finish, plating raffinal.

The effect that the utility model produced is: LED Tunnel Lamp reflection shield of the present utility model, effectively solve LED light fixture secondary light-distribution problem, improved the uniformity of illuminance of LED, thereby increased the application of LED light fixture, guaranteed the leading position of LED light fixture as light.

Description of drawings

Further specify the utility model below in conjunction with accompanying drawing and case study on implementation.

Fig. 1 three-dimensional structure perspective view of the present utility model;

Fig. 2 cross section index path of the present utility model;

Fig. 3 cross-sectional structure schematic diagram of the present utility model.

Number in the figure:

1, the datum axis 2 of road length direction, the datum axis 3 of the direction of having a lot of social connections, place the cavity 4 of led light source, parabolic profile 5, elliptic surface 6, the bottom surface 7 of reflection shield, the led light source centre of luminescence 8, light 1, light 2 10, light 3 11, light 4 12, light 5 13, focus 14, light-emitting window angle 15, reflection shield opening size 16, elliptic surface height 17, parabolic profile height 18, reflection shield bottom surface opening size 19, light source installed surface opening size

The specific embodiment

Below by a case study on implementation, further specify the utility model.

Fig. 1 is the three-dimensional structure perspective view of the utility model reflection shield, and wherein the datum axis 2 of the datum axis 1 of road length direction, the direction of having a lot of social connections is respectively the datum axis of the road length and the direction of having a lot of social connections.Reflection shield among Fig. 1 contains two pairs of parabolic profiles 4 and elliptic surface 5 has parabolic profile and the elliptic surface inequality that limits and control the light trend through design.The bottom surface 6 of Fig. 1 reflection shield is to comprise that is used to place led light source and the shape plane of cavity 3 arbitrarily.

Among Fig. 2, the light that the led light source centre of luminescence 7 light sources send, part is uncontrollable light, another part is a controllable light, the free outgoing of uncontrollable light, controllable light arrives the road surface desired location through

elliptic surface

4 and 5 reflections of parabolic profile.Among Fig. 2, dotted line is a normal.On the parabolic profile, light 8 shines the road surface after reflection, and its illumination is E ₈=I ₈/ r ₈ ², light 9 shines the road surface after reflection, and its illumination is E ₉=I ₉/ r ₉ ²Because led light source is a cosine radiator, the center luminous intensity is I ₀, I then ₈=I ₀Cos θ ₈, I ₉=I ₀Cos θ ₉, θ ₈＜θ ₉, I then ₈＞I ₉, r8＞r ₉So, can calculate and make E ₈=E ₉Light 10,11,12 reflects after shine the road surface after the overfocus 13, E through elliptic surface 4 ₁₀=I ₁₀/ r ₁₀ ², E ₁₁=I ₁₁/ r ₁₁ ², E ₁₂=I ₁₂/ r ₁₂ ², I ₁₀＜I ₁₁＜I ₁₂, r ₁₀＜r ₁₁＜r ₁₂, can make E ₁₀=E ₁₁=E ₁₂The photosynthetic reason of the light of elliptic surface reflection and the reflection of parabolic profile distributes, and just can realize the identical purpose of different distance place, road surface illumination.

Fig. 3 is a cross-sectional structure schematic diagram of the present utility model, is elliptic surface 4, parabolic profile 5, light-emitting window angle 14, reflection shield opening size 15, elliptic surface height 16, parabolic profile height 17, reflection shield bottom surface opening size 18, light source installed surface opening size 19 and the light source luminescent central point of choosing behind the suitable parameter 7.

Claims

1. Novel LED tunnel lamp reflection shield is characterized in that: the mode that described reflection shield adopts the part elliptic surface to combine with part parabolic profile, and the road length direction, the part elliptic surface is inner, and part parabolic profile is outer, symmetric arrangement; The direction of having a lot of social connections, part elliptic surface are by down, and part parabolic profile is by last; Light source is placed on the focus of elliptic surface, reaches the reflection of elliptic surface to light; Light source is placed between the focus and summit of parabolic profile, reaches the reflection of parabolic type in the face of light.

2. reflection shield according to claim 1 is characterized in that: described reflection shield is applied to the led light source between the beam angle 60-160 degree.