TWI773213B - Counter beam light - Google Patents

Abstract

A counter beam light is provided to solve the problem of glare generation and high power consumption of the conventional tunnel light. The counter beam light includes a light source and a cover. The light source emits a first beam and a second beam. The cover includes an underside, an illumination surface is opposite to the underside, and a reflection surface is respectively adjacent to the underside and the illumination surface. The cover includes an installation space at the underside. The installation space’s inner wall is a light-incident surface which is opposite to the illumination surface and the reflection surface. The light source is in the installation space. The first beam enters the light-incident surface and shoots out of the installation space. The second beam enters the light-incident surface, is reflected on the reflection surface, and shoots out of the installation space.

Description

Backlighting lamps

The present invention relates to a tunnel lighting device, in particular to a backlight type lamp with high light extraction efficiency and low glare value.

When the vehicle enters or leaves the tunnel from the general road, the driver is affected by the black hole or white hole effect due to the sudden change of the ambient illumination, which causes the driver's vision to temporarily fail and cannot identify the road conditions. Therefore, the lighting settings of the tunnel sections must take into account the light distribution curve of the lamps and their installation height, location and illumination angle, etc., to minimize the difference in illuminance inside and outside the tunnel, so as to reduce the risk of traffic accidents due to visual failure of drivers. love affair.

The conventional tunnel lighting facilities include high-pressure sodium lamps that are densely distributed at the entrance and exit of the tunnel, and fluorescent _lamps located in the middle of the tunnel. ), glare value (Glare Factor, T _I ), Contrast Revealing Coefficient (q _c ) and other parameters to comply with the International Commission on Illumination (International Commission on Illumination, CIE) specifications, but the lampshade changes the light output of the high-pressure sodium lamp The type system leads to the attenuation of light emission and waste of light, which increases the power consumption of conventional tunnel lighting facilities. In addition, high-pressure sodium lamps also have shortcomings such as short service life, easy heat generation, scattered light, and mercury vapor.

In view of this, it is still necessary to improve the conventional tunnel lighting facilities.

In order to solve the above problems, the purpose of the present invention is to provide a backlight type lamp, which can improve the lighting performance and reduce the glare effect.

Another object of the present invention is to provide a backlight type lamp, which can effectively utilize light to reduce the energy consumption of the lamp.

Another object of the present invention is to provide a backlight type lamp, which can adjust the light distribution curve of the lamp according to the usage conditions.

The directionality or its similar terms, such as "left", "right", "top (top)", "bottom (bottom)", "inside", "outside", etc., are mainly referred to the attached drawings. The direction of the present invention, each directionality or its similar terms are only used to assist the description and understanding of the various embodiments of the present invention, and are not used to limit the present invention.

The use of the quantifier "a" or "an" for the elements and components described throughout the present invention is only for convenience and provides a general meaning of the scope of the present invention; in the present invention, it should be construed as including one or at least one, and a single The concept of also includes the plural case unless it is obvious that it means otherwise.

The backlight type lamp of the present invention comprises: a light source, which emits a first light and a second light; and a lampshade, which has a bottom surface, a light-emitting surface opposite to the bottom surface, and a light-emitting surface corresponding to the bottom surface and the light-emitting surface respectively. An adjacent reflecting surface, the angle between the reflecting surface and the bottom surface is 60-80 degrees, the light-emitting surface includes a first light-emitting surface and a second light-emitting surface with discontinuous curvature radius, and the first light-emitting surface is The radius of curvature is 106 mm to 126 mm, the radius of curvature of the second light emitting surface is 252 mm to 272 mm, the bottom of the lampshade has an accommodating space, the inner wall of the accommodating space is a light incident surface, the light incident The light incident surface includes a first light incident surface with discontinuous curvature radius and a second light incident surface, and the curvature radius of the first light incident surface is 80 mm to 100 mm, The radius of curvature of the second light incident surface is 30 mm to 50 mm, the first light incident surface is opposite to the first light exit surface, and the The second light incident surface is opposite to the second light emitting surface, the light source is located in the accommodating space, the first light is incident on the first light incident surface and exits from the first light emitting surface, and the second light is incident on the second light The light incident surface is reflected on the reflective surface, and is emitted from the second light emitting surface.

Accordingly, the backlight type lamp of the present invention can change the light emitting direction of the light source by the lampshade, so that the light is reversely irradiated to the moving vehicle, which can provide the driver with comfortable road brightness, contrast and identification of objects in front, and avoidance of Glare effect, its good light quality can not only reduce traffic accidents caused by visual failure, but also reduce energy waste. In addition, incident light with different elevation angles can correspond to different refraction angles, which has the effect of adjusting the light distribution curve.

Wherein, the opening of the accommodating space is located on the bottom surface of the lampshade, and the light source is located in the opening of the accommodating space. In this way, the lampshade can cover the light source, so that the light penetrates the lampshade and then exits, which has the effect of convenient installation of the light source and reduction of waste of light.

Wherein, the bottom surface of the lampshade is attached to the inner wall of the tunnel, the light emitting direction of the light source is directed toward the light incident surface, and the light exit surface is directed toward the vehicle passing through the tunnel. In this way, after the light passes through the lampshade, it can irradiate the moving vehicle in a reverse direction, which has the effect of improving the contrast recognition and reducing the glare effect.

Wherein, the light source is a light-emitting diode chip, which includes a plurality of light-emitting diodes. In this way, the light-emitting efficiency and durability of the light-emitting diode are better than those of the high-pressure sodium lamp, which has the effect of saving energy and prolonging the service life.

Wherein, the material of the lampshade is polycarbonate resin, polymethyl methacrylate or glass. In this way, the lampshade can reduce the loss during light transmission, and can also resist moisture, heat and impact, and has the functions of improving the light output efficiency and protecting the light source.

1: Light source

2: Lampshade

21: Underside

22: light-emitting surface

22a: The first light-emitting surface

22b: The second light-emitting surface

23: Reflective surface

24: light incident surface

24a: The first light incident surface

24b: The second light incident surface

E: luminous surface

L1: first ray

L2: second ray

S: accommodating space

[FIG. 1] An exploded perspective view of the first embodiment of the present invention.

[FIG. 2] A combined cross-sectional view of the first embodiment of the present invention.

[FIG. 3] A combined cross-sectional view of a second embodiment of the present invention.

In order to make the above-mentioned and other objects, features and advantages of the present invention more obvious and easy to understand, the preferred embodiments of the present invention are exemplified below, and are described in detail as follows in conjunction with the accompanying drawings: please refer to Figure 1, It is the first embodiment of the backlight type lamp of the present invention, and includes a light source 1 and a lampshade 2 , the light source 1 is directed toward the lampshade 2 , and the lampshade 2 covers the light source 1 .

Please refer to FIG. 2, the light source 1 has a light-emitting surface E, the light source 1 takes the light-emitting surface E as a 0-degree reference plane, and emits light toward an elevation angle of 0 to 90 degrees, and the closer the light is to a 90-degree elevation angle The greater the intensity of the light source 1, the number of light rays emitted by the light source 1 can be divided into a first light ray L1 and a second light ray L2 according to the light emitting direction. As shown in FIG. 2, the rightward light emitted by the light source 1 is the first light ray L1 The light ray L1, and the light ray deviated to the left is the second light ray L2. The light source 1 can be a plurality of light emitting diodes (Light Emitting Diode, LED) assembled on a single chip to replace the existing high pressure sodium lamp.

Please refer to Figures 1 and 2, the lampshade 2 is a transparent solid structure, the lampshade 2 has a bottom surface 21, a light-emitting surface 22 opposite to the bottom surface 21, and respectively corresponding to the bottom surface 21 and the light-emitting surface 22 Adjacent to a reflective surface 23, the light emitting surface 22 may also include a first light emitting surface 22a and a second light emitting surface 22b with discontinuous curvature radii. The bottom of the lampshade 2 forms an arc concave accommodating space S. The opening of the space S faces outward and is preferably located on the bottom surface 21 . The arc-concave inner wall of the accommodating space S is a light incident surface 24 . The light incident surface 24 is opposite to the light exit surface 22 and the reflecting surface 23 . The space S is used to set the light source 1, so that the light-emitting surface E faces the light-incident surface 24, then the light can enter the lampshade 2 from the light-incident surface 24, and travel to the light-emitting surface 22 and the reflecting surface 23, and the light entering Glossy 24 also The first light incident surface 24a and the second light incident surface 24b with discontinuous curvature radius may be included, so that the first light incident surface 24a is opposite to the first light exit surface 22a, and the second light incident surface 24b is opposite to the second light exit surface face 22b. The lampshade 22 can be made of transparent materials such as polycarbonate resin (PC), polymethyl methacrylate (acrylic, PMMA) or glass. Moreover, the reflective surface 23 is coated or filmed, which can be used in the lampshade. 2 Internally reflected light.

The radius of curvature of the first light-emitting surface 22a is preferably 106 mm to 126 mm, the radius of curvature of the second light-emitting surface 22b is preferably 252 mm to 272 mm, and the radius of curvature of the first light incident surface 24a is preferably 80 mm mm to 100 mm, the radius of curvature of the second light incident surface 24b is preferably 30 mm to 50 mm, the angle between the reflection surface 23 and the bottom surface 21 is preferably 60 degrees to 80 degrees, the height of the lampshade 2 (ie The farthest distance from the bottom surface 21 to the light-emitting surface 22) is preferably 150 mm to 170 mm, and the length of the lampshade 2 (ie the length of the bottom surface 21) is preferably 156 mm to 176 mm.

Please refer to FIG. 2 , the first light L1 and the second light L2 of the light source 1 enter the lampshade 2 from the light incident surface 24 respectively and are refracted. According to Snell's Law, when the light When entering a dense medium (the transparent material of the lampshade 2 as shown in FIG. 2 ) from a sparse medium (air or vacuum in the accommodating space S as shown in FIG. 2 ), the incident angle of the light is greater than or equal to the refraction angle; Conversely, when the first light L1 and the second light L2 exit the lampshade 2 from the light emitting surface 22, the light enters the sparse medium from the dense medium, and the incident angle of the light is less than or equal to the refraction angle. Therefore, the first light L1 sequentially passes through the first light incident surface 24a and the first light exit surface 22a and is deflected; and the second light L2 is incident on the second light incident surface 24b in sequence, and the reflection After the surface 23 is reflected, it exits the second light emitting surface 22b, and the traveling direction of the second light L2 is changed through the reflecting surface 23, so that the first light L1 and the second light L2 emitted at different elevation angles can be transmitted. The lampshade 2 is emitted in a similar angular direction.

When the backlight lamp of the present invention is used for tunnel lighting, the bottom surface 21 of the lampshade 2 is attached to the inner wall of the tunnel, the light source 1 is located at the opening of the accommodating space S, and the light-emitting surface E faces the tunnel. The light incident surface 24, the light exit surface 22 faces the vehicle coming through the tunnel, so that the light of the light source 1 passes through the lampshade 2, and then illuminates the driving vehicle in the opposite direction. When the vehicle passes, the driver can see the sufficient and comfortable road surface Brightness, so that the contrast between the object and the background is obvious and easy to identify, while avoiding the glare effect on the driver. Please refer to Table 1, which is the lighting performance test results of the backlight lamp of the present invention and several conventional tunnel lighting facilities according to the specifications of the International Commission on Illumination.

It can be seen from Table 1 that conventional tunnel lamps of different technologies (high-pressure sodium lamps or light-emitting diode lamps) and different brands are difficult to fully comply with the specifications of the International Commission on Lighting. In addition, although the light-emitting diode has the advantages of energy saving, high luminous efficiency, long service life and light concentration, etc., through the optical element Adjusted lighting performance is difficult to take into account the contrast ratio and low glare; the backlight lamp of the present invention concentrates the light output range of the light-emitting diodes, and projects light to the road and the vehicle from obliquely above, so that the average road brightness, contrast display coefficient and glare are improved. Values and other test parameters are in line with the requirements of the International Commission on Illumination.

Please refer to FIG. 3, which is the second embodiment of the backlight lamp of the present invention. The light-emitting surface 22 and the light-incident surface 24 of the lampshade 2 are continuous curved surfaces, and the curvature radius of the light-emitting surface 22 is preferably 420 mm to 440 mm, the radius of curvature of the light incident surface 24 is preferably 30 mm to 50 mm, the angle between the reflection surface 23 and the bottom surface 21 is preferably 65 degrees to 85 degrees, and the height of the lampshade 2 is preferably 163 mm to 183 mm, the length of the lampshade 2 is preferably 192 mm to 212 mm. The first light beam L1 is refracted twice and emitted from the light emitting surface 22 , and the second light ray L2 is reflected by the reflecting surface 23 to adjust the direction, so that the second light ray L2 is also emitted from the light emitting surface 22 .

To sum up, the back-illuminated lamp of the present invention can provide the driver with comfortable road brightness and contrast recognition of objects in front by changing the light-emitting direction of the light source through the lampshade, so that the light is irradiated in the opposite direction to the moving vehicle. and avoid glare effect, its good light quality can not only reduce traffic accidents caused by visual failure, but also reduce energy waste. In addition, the backlight lamp of the present invention can replace high-pressure sodium lamps, so as to save electric energy, reduce replacement rate and Reduce heavy metal pollution and other effects.

Although the present invention has been disclosed by the above-mentioned preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications relative to the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the patent application attached hereto.

1: Light source

2: Lampshade

21: Underside

22: light-emitting surface

22a: The first light-emitting surface

22b: The second light-emitting surface

23: Reflective surface

24: light incident surface

24a: The first light incident surface

24b: The second light incident surface

E: luminous surface

L1: first ray

L2: second ray

S: accommodating space

Claims (5)

A backlight type lamp, comprising: a light source, which emits a first light and a second light; and a lampshade, which has a bottom surface, a light-emitting surface opposite to the bottom surface, and is adjacent to the bottom surface and the light-emitting surface respectively a reflective surface, the angle between the reflective surface and the bottom surface is 60-80 degrees, the light-emitting surface includes a first light-emitting surface and a second light-emitting surface with discontinuous curvature radius, the curvature radius of the first light-emitting surface It is 106mm~126mm, the curvature radius of the second light emitting surface is 252mm~272mm, the bottom of the lampshade has an accommodation space, the inner wall of the accommodation space is a light incident surface, the light incident surface is opposite to The light-emitting surface and the reflecting surface, the light-incident surface includes a first light-incident surface with discontinuous curvature radius and a second light-incident surface, the curvature radius of the first light-incident surface is 80 mm to 100 mm, the first light incident surface The radius of curvature of the second light incident surface is 30 mm to 50 mm, the first light incident surface is opposite to the first light exit surface, and the second light incident surface is opposite to the second light exit surface, the light source is located in the accommodating space, the The first light is incident on the first light incident surface and exits from the first light emitting surface, and the second light is incident on the second light incident surface, reflected on the reflecting surface, and exits on the second light emitting surface. The backlight type lamp of claim 1, wherein the opening of the accommodating space is located on the bottom surface of the lampshade, and the light source is located in the opening of the accommodating space. The backlight type lamp of claim 2, wherein the bottom surface of the lampshade is attached to the inner wall of the tunnel, the light emitting direction of the light source is toward the light incident surface, and the light exit surface is directed toward the vehicle passing through the tunnel. The backlight lamp of claim 1, wherein the light source is a light-emitting diode chip, comprising a plurality of light-emitting diodes. The backlight type lamp of claim 1, wherein the material of the lampshade is polycarbonate resin, polymethyl methacrylate or glass.

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