Light distribution device and lighting system for tunnel lighting

Abstract

The present invention discloses a light distribution device and a lighting system for tunnel lighting, wherein the light distribution device includes a reflector and a light-transmitting cover, the light-transmitting cover includes a light-incident surface and a light-exiting surface, the bottom of the reflector is arranged on the light-incident surface, the top of the reflector is provided with a groove for placing an LED light source, the reflector is used to reflect the light of the LED light source to the light-incident surface, and the light-transmitting cover is used to scatter the light irradiated to the light-incident surface. The present invention first uses a reflector to perform a second light distribution on the light of the LED light source to improve the comfort of the lighting, and then the light-transmitting cover performs a third light distribution on the light irradiated to the light-incident surface, thereby improving the accuracy of the light distribution, solving the problem of low comfort caused by using lens light distribution and inaccurate light distribution caused by using only reflectors for light distribution, improving the comfort and light distribution accuracy of tunnel lighting, and can be widely used in the field of lighting technology.

Description

Technical Field

[0001] The present invention relates to the field of lighting technology, and in particular to a light distribution device and a lighting system for tunnel lighting. Background Art

[0002] With the rapid development of national highway construction, the demand for tunnel lighting is increasing day by day, and the comfort requirements for tunnel lighting are getting higher and higher. LED tunnel lighting replaces traditional fluorescent lamps and sodium lamps, greatly reducing the energy consumption of tunnel lighting. Among the existing technologies, optical lenses or reflectors are generally used to distribute light for LED tunnel lighting. Although the use of optical lenses can achieve precise light distribution design, it reduces the comfort of tunnel lighting to a certain extent and easily causes visual fatigue; while the use of reflectors for LED tunnel lighting can improve lighting comfort, but it is difficult to achieve precise light distribution at large intervals. Summary of the invention

[0003] In order to solve the above technical problems, an object of the present invention is to provide a light distribution device and a lighting system for tunnel lighting that can accurately distribute light and improve lighting comfort.

[0004] The technical solution adopted by the present invention is:

[0005] A light distribution device for tunnel lighting includes a reflector and a light-transmitting cover, wherein the light-transmitting cover includes a light-incident surface and a light-emitting surface, the bottom of the reflector is arranged on the light-incident surface, the top of the reflector is provided with a groove for accommodating an LED light source, the reflector is used to reflect light from the LED light source to the light-incident surface, and the light-transmitting cover is used to scatter light irradiated to the light-incident surface.

[0006] Furthermore, the reflector is in an arch shape.

[0007] Furthermore, the light incident surface is a wavy curved surface, and the light emitting surface is a flat surface.

[0008] Furthermore, in the C0°-C180° cross section of the light distribution device, the reflector is in an inverted U shape, and the light incident surface and the light emitting surface are both straight lines.

[0009] Furthermore, on the C0°-C180° cross section of the light distribution device, the emission angle of the reflector is 60°-100°.

[0010] Furthermore, in the C90°-C270° cross section of the light distribution device, the reflector is rectangular, the light incident surface is a wavy line, and the light emitting surfaces are all straight lines.

[0011] Furthermore, on the C90°-C270° cross section of the light distribution device, the wavy line of the light incident surface is composed of a plurality of concave arcs connected together.

[0012] Furthermore, on the C90°-C270° cross section of the light distribution device, the emission angle of the light emitting surface is 110-150°.

[0013] Furthermore, the curved path of the arc satisfies a first formula, which is:

[0014] Y1=-7E-05x 4 +0.003x 3 -0.0329x 2 -0.0058x+1.0449

[0015] Where Y1 represents the vertical coordinate, and the horizontal coordinate range is 0 <X<10。

[0016] Another technical solution adopted by the present invention is:

[0017] A lighting system comprises an LED light source and a light distribution device, wherein the light distribution device adopts the above-mentioned light distribution device for tunnel lighting.

[0018] The beneficial effects of the present invention are as follows: the present invention first uses a reflector to perform a second light distribution on the light of the LED light source to improve the comfort of lighting, and then uses a light-transmitting cover to perform a third light distribution on the light irradiated to the light incident surface, thereby improving the accuracy of light distribution, solving the problem of low comfort caused by using lens light distribution and inaccurate light distribution caused by using only reflectors, and improving the comfort and light distribution accuracy of tunnel lighting. In addition, the light distribution device of the present invention has a simple structure, is easy to implement and install, and meets the requirements of most tunnel lighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a light distribution device for tunnel lighting of the present invention;

[0020] Figure 2 is a cross-sectional view of the light distribution device of the present invention in the C0°-C180° direction;

[0021] Figure 3 is a cross-sectional view of the light distribution device of the present invention in the direction of C90°-C270°;

[0022] Figure 4 is a schematic diagram of the first formula and the corresponding curve path. DETAILED DESCRIPTION

[0023] Embodiment 1

[0024] like Figures 1 to 3As shown, this embodiment provides a light distribution device for tunnel lighting, including a reflector 1 and a light-transmitting cover 2, wherein the light-transmitting cover 2 includes a light incident surface and a light emitting surface, the bottom of the reflector 1 is arranged on the light incident surface, and the top of the reflector 1 is provided with a groove for accommodating an LED light source 3, the reflector 1 is used to reflect the light of the LED light source 3 to the light incident surface, and the light-transmitting cover 2 is used to scatter the light irradiated to the light incident surface.

[0025] Reference Figure 1 The top of the reflector 1 is provided with a groove, and the groove is used to place the LED light source 3. Figure 2 After the light from the LED light source 3 is irradiated into the reflector 1, the reflector 1 performs a second distribution of the light. The reflective surface of the reflector 1 adopts an arc structure. For example, the reflective surface of the reflector 1 can be in the shape of a hemispherical surface or half of a cylindrical side surface. Figure 3 After the reflector 1 reflects the light to the light incident surface, the light is distributed for the third time by the light-transmitting cover 2. The light-transmitting cover 2 is a solid lens. After the light is refracted by the light-transmitting cover 2, the light is scattered out, thereby achieving precise spacing light distribution. This embodiment uses the reflector 1 for the second light distribution, which can improve the comfort of lighting, and then the light-transmitting cover 2 performs the third light distribution on the light to achieve precise light distribution. In addition, the light distribution device of this embodiment has a simple structure, is easy to implement and install, and meets the requirements of most tunnel lighting.

[0026] Reference Figure 1 As a further preferred embodiment, the reflector 1 is in an arch shape.

[0027] On the C0°-C180° cross section of the light distribution device, the reflector 1 reflects the light, and on the C90°-C270° cross section of the light distribution device, the reflector 1 does not distribute the light.

[0028] Reference Figure 1 , further as a preferred embodiment, the light incident surface is a wavy surface, and the light emitting surface is a flat surface.

[0029] The light-emitting surface is designed to be flat, so that the light distribution device can prevent dust accumulation and is easier to clean.

[0030] Reference Figure 2 As a further preferred embodiment, in the C0°-C180° cross section of the light distribution device, the reflector 1 is in an inverted U shape, and the light incident surface and the light emitting surface are both straight lines. The emission angle of the reflector 1 is 60°-100°.

[0031] The reflector 1 adopts a curved surface structure, and the light distribution angle of the tunnel lamp can be changed by adjusting the curvature of the curved structure. On the C0°-C180° cross section of the light distribution device, the light beam outlet angle of the LED light source 3 is 60°-100° through the reflection of the reflector 1, that is, the exit angle at the exit of the reflector 1 is 60°-100°. Specifically, the exit angle of this embodiment is 80°, and all reflected light is controlled within the range of 80° to enter the light surface. The light-transmitting cover 2 is a flat design, which does not change the exit light angle of the LED after passing through the reflector 1, so it is suitable for tunnel lighting with a width of 2-3 lanes on both sides.

[0032] Reference Figure 3 As a further preferred embodiment, on the C90°-C270° cross section of the light distribution device, the reflector 1 is rectangular, the light incident surface is a wavy line, and the light emitting surfaces are all straight lines.

[0033] On the C90°-C270° cross section of the light distribution device, the reflector 1 does not perform light distribution processing, and the light is diverged through the light-transmitting cover 2. The diffusion degree of the light on the light-emitting surface can be adjusted by adjusting the wave curvature of the light-entering surface.

[0034] Reference Figure 3 As a further preferred embodiment, on the C90°-C270° cross section of the light distribution device, the wavy line of the light incident surface is composed of a plurality of concave arcs connected. The light exiting surface has an exit angle of 110-150°.

[0035] The wavy lines are all composed of concave arcs, and the parameters of each arc are the same, and the emission angle on the light-emitting surface is 110-150°. Specifically, in this embodiment, the light emission angle in the longitudinal direction (i.e., the direction of the C90°-C270° cross section of the light distribution device) is diffused to 120-140°, that is, the emission angle is 120-140°, which reduces the phenomenon of concentrated light intensity in the center of the LED light source 3, can achieve precise light distribution with large spacing, and avoid glare.

[0036] Reference Figure 4 As a further preferred embodiment, the curved path of the arc satisfies a first formula, which is:

[0037] Y1=-7E-05x 4 +0.003x 3 -0.0329x 2 -0.0058x+1.0449

[0038] Where Y1 represents the vertical coordinate, and the horizontal coordinate range is 0 <X<10。

[0039] The curve path of the arc satisfies the first formula, and the correlation coefficient reaches 0.999.

[0040] In summary, the light distribution device for tunnel lighting of this embodiment has the following beneficial effects:

[0041] (1) The reflector 1 is used to perform a second light distribution on the light of the LED light source 3 to improve the comfort of lighting, and then the light-transmitting cover 2 performs a third light distribution on the light irradiated to the light incident surface, thereby improving the accuracy of light distribution, solving the problem of low comfort caused by using lens light distribution and inaccurate light distribution caused by using only the reflector 1 for light distribution, and improving the comfort and light distribution accuracy of tunnel lighting. In addition, the light distribution device of the present invention has a simple structure, is easy to implement and install, and meets the requirements of most tunnel lighting.

[0042] (2) The reflector 1 is used to distribute light in the C0°-C180° cross-sectional direction of the light distribution device, and the light-transmitting cover 2 is used to distribute light in the C90°-C270° cross-sectional direction of the light distribution device. Adjustments can be made in different directions according to different application environments. For example, when the road width is different, the curvature of the reflector 1 is adjusted; when the spacing between the installed lamps needs to be adjusted, the curvature of the light incident surface of the light-transmitting cover 2 is adjusted, thereby improving the applicability of the light distribution device and enabling the light distribution device to be generally adapted to tunnel lighting.

[0043] Embodiment 2

[0044] like Figure 2 As shown, this embodiment provides a lighting system, including an LED light source and a light distribution device, wherein the light distribution device adopts a light distribution device for tunnel lighting described in the first embodiment.

[0045] A lighting system of this embodiment has any combination of technical features of a light distribution device for tunnel lighting described in the first embodiment of the present invention, and has the corresponding functions and beneficial effects of the first embodiment.

[0046] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A light distribution device for tunnel lighting, characterized in that: It includes a reflector and a light-transmitting cover, wherein the light-transmitting cover includes a light-incident surface and a light-emitting surface, the bottom of the reflector is arranged on the light-incident surface, the top of the reflector is provided with a groove for placing an LED light source, the reflector is used to reflect the light of the LED light source to the light-incident surface, and the light-transmitting cover is used to scatter the light irradiated to the light-incident surface; The reflector is in an arch shape, the light incident surface is a wavy curved surface, and the light emitting surface is a flat surface; On the C0°-C180° cross section of the light distribution device, the reflector is in an inverted U shape, the reflective surface of the reflector adopts an arc structure, and the light incident surface and the light emitting surface are both straight lines; On the C0°-C180° cross section of the light distribution device, the reflector has an emission angle of 60°-100°; On the C90°-C270° cross section of the light distribution device, the reflector is rectangular, the light incident surface is a wavy line, and the light emitting surfaces are all straight lines, and the wavy line of the light incident surface is composed of a plurality of concave arcs connected; On the C90°-C270° cross section of the light distribution device, the light emitting surface has an emission angle of 110-150°; The curved path of the arc satisfies a first formula, which is: Y1=-7E-05x 4 +0.003x 3 -0.0329x 2 -0.0058x+1.0449 Where Y1 represents the vertical coordinate, and the horizontal coordinate range is 0 <X<10。 2. A lighting system, characterized in that: It comprises an LED light source and a light distribution device, wherein the light distribution device adopts the light distribution device for tunnel lighting as described in claim 1.

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