JP6753211B2 - lighting equipment - Google Patents

Description

The present invention relates to a lighting fixture that illuminates a road surface.

In road lighting (including tunnel lighting) that illuminates a road, the brightness uniformity of the road surface brightness is usually not "1". That is, the road surface brightness distribution obtained by measuring the traveling direction of the vehicle from the measurement point on the road surface is usually higher than the average road surface brightness (hereinafter referred to as “high brightness point”) and lower than the average road surface brightness. The distribution is such that the locations (hereinafter referred to as “low-brightness locations”) are alternately arranged in the traveling direction.
Therefore, the driver of the vehicle travels on the road surface where the high-luminance portion and the low-luminance portion alternately and continuously change in such an environment of road lighting.

The so-called Purkinje phenomenon, in which the spectral vision efficiency of the human eye in a mesopic environment is different from the spectral vision efficiency in a bright environment (bright environment), is known. The mesopic environment corresponds to a nighttime outdoor environment such as a street space or a road space at night. Therefore, conventionally, a technique considering the Purkinje phenomenon has been proposed in the light source design of an outdoor lighting fixture that illuminates the outdoors (see, for example, Patent Document 1). In this technique, the S / P ratio of the light source is used as a parameter, and it is generally known that as the S / P ratio increases, the brightness in a mesopic environment also increases. The S / P ratio is a ratio of scotopic brightness and photopic brightness.
Further, Patent Document 2 discloses a technique for improving the visibility of peripheral vision by adjusting the S / P ratio.

Japanese Patent No. 5834258 Japanese Patent No. 5421817

By the way, many obstacles in road lighting have relatively low reflectance, and therefore generally appear as a black silhouette against a bright road surface. Therefore, it is difficult to visually recognize an obstacle existing in a place where the road surface brightness is particularly low among the places with low brightness assimilated with the road surface. For this reason, when the driver of a vehicle traveling in a conventional road lighting environment is looking at a high-brightness part on the road surface in a central view, the driver sees an obstacle existing in a low-brightness part located in the peripheral vision. The time until the obstacle is visually recognized is particularly slower than when the obstacle is present in a high-luminance area.
Therefore, for example, by increasing the S / P ratio of the light source to improve the visibility of the peripheral vision, even if an obstacle exists in a low-luminance portion located in the peripheral visual field, the time until the obstacle is visually recognized. It can be expected to suppress the delay.
However, when the S / P ratio of the light source is high, the radiant energy of a short wavelength directly incident on the eye from the light source is increased, so that there is a problem that unpleasant glare is also easily felt.

An object of the present invention is to provide a lighting fixture capable of enhancing the visibility of obstacles on the road surface in peripheral vision without causing unpleasant glare.

The present invention is a lighting device that illuminates a road on which a vehicle travels, and includes a light emitting unit that illuminates the traveling direction of the vehicle and a direction opposite to the traveling direction, and the scotopic brightness and the photopic brightness of the light emitting unit. When the ratio is the S / P ratio, the S / P ratio of the light emitting unit that illuminates the traveling direction is larger than the S / P ratio of all the light emitting units that illuminate the direction opposite to the traveling direction. It is characterized by that.

According to the present invention, in the luminaire, the light emitting unit has the minimum S / P ratio in a predetermined range corresponding to the glare zone in the vertical plane including the traveling direction , at least in the range facing the opposite side. It is characterized by having an S / P ratio of.

According to the present invention, in the lighting fixture, the light emitting surface of the light emitting portion has a relationship in which the brightness of the range above the predetermined range corresponding to the glare zone in the vertical plane is symmetrical with respect to the range in the vertical direction. It is characterized in that the value is larger than the brightness of the portion on the side in the traveling direction.

According to the present invention, in the lighting equipment, the light emitting unit has an S / P ratio in a range vertically above a predetermined range corresponding to the glare zone in the vertical plane, and an S / P ratio in a predetermined range corresponding to the glare zone. A value larger than the P ratio, a value equal to the maximum S / P ratio, or a value equal to the S / P ratio of the portion on the side in the traveling direction that has a symmetric relationship with respect to the range in the vertical direction. It is characterized by.

The present invention, in the above lighting apparatus, the light emitting portion, within the range facing the side of the reverse, S / P ratio in the range excluding the range of vertical ways improve side of the predetermined range corresponding to the grayed Reazon is, It is characterized by being 1.0 to 2.2.

The present invention, in the above lighting apparatus, the largest S / P ratio, the difference between the minimum of S / P ratio is characterized in that it is 0.3 or more.

The present invention, in the above lighting apparatus, S / P ratio of the maximum is 1.9 to 3.0, and wherein the.

According to the present invention, it is possible to enhance the visibility of obstacles on the road surface in peripheral vision without causing unpleasant glare.

It is a schematic diagram which shows the usage mode of the road lighting fixture which concerns on embodiment of this invention. It is a figure which shows typically the structure of the road lighting fixture. It is a figure which shows an example of the road surface brightness distribution of the road surface illuminated by a road lighting fixture. It is a figure which shows typically the distribution of the S / P ratio of the illumination light in a vertical plane.

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, a road lighting fixture is exemplified as one aspect of the lighting fixture.

FIG. 1 is a schematic view showing a usage mode of the road lighting fixture 1 according to the present embodiment.
The road lighting fixture 1 illuminates the road surface 4A of the road 4 on which the vehicle 2 travels, and is attached to the upper end of a lighting column 6 erected on the side of the road 5. A plurality of road lighting fixtures 1 are provided on the road 4 at intervals along the traveling direction A of the vehicle 2.

Each road luminaire 1 has a traveling direction A of the vehicle 2 and a reverse direction of the traveling direction A (hereinafter referred to as "reverse traveling direction" and is designated by reference numeral B) with reference to its own installation position. Illuminate the illumination range R that extends to both. Then, the lighting ranges R of the road lighting fixtures 1 are lined up in a row along the traveling direction A, so that the road 4 is illuminated by these road lighting fixtures 1.
The road 4 shown in FIG. 1 is merely an example, and the configuration of the road 4 and the arrangement of the road lighting fixture 1 can be appropriately changed according to the type and purpose of the road 4.

FIG. 2 is a diagram schematically showing the configuration of the road lighting fixture 1. This figure shows the structure of a cross section of the road luminaire 1 cut in a vertical plane including the traveling direction A.
The road lighting fixture 1 includes a fixture body 10 and a glove 12, and the fixture body 10 is provided with a light source unit 14.
The light source unit 14 includes a plurality of LEDs 16A and LEDs 16B, which are examples of light emitting elements, in the light source. The LED 16A and the LED 16B have an output required for illuminating the road 4, and the plurality of LEDs 16A irradiate the traveling direction A of the road 4 with respect to the road luminaire 1. On the contrary, the plurality of LEDs 16B irradiate the illumination light in the reverse traveling direction B. The light source unit 14 also includes LEDs that illuminate the lower side in the vertical direction and the front side (crossing direction of the road 4) of the road luminaire 1, and these illuminating lights illuminate the road surface 4A shown in FIG. Illuminate the range R.

The light distribution characteristic of the road lighting fixture 1 is a so-called symmetrical light distribution in which the light distribution is symmetrical with respect to the cross section of the road 4. That is, the illuminance distribution in the illumination range R is the range on the side of the traveling direction A with respect to the road lighting fixture 1 (hereinafter, referred to as the “traveling side range” and affixed with reference numeral RA) and the side in the reverse traveling direction B. The range (hereinafter referred to as the "reverse running side range" and the symbol RB is attached) is approximately equal.

Here, a portion of the road lighting fixture 1 that emits light observed from the outside and that illuminates the road surface 4A by the emission is referred to as a light emitting portion 18. In the road lighting fixture 1, the light emitting unit 18 includes a light source unit 14 and a glove 12.

FIG. 3 is a diagram showing an example of the road surface brightness distribution of the road surface 4A illuminated by the road lighting fixture 1.
In this road surface brightness distribution, the width D is 7 meters, and the road lighting fixture 1 is installed at intervals E of 40 meters on the road 4 including two lanes, and the road lighting fixture 1 is 60 meters ahead of the traveling direction A. The position where 1 is located is defined as the measurement position O, and the road surface luminance distribution when the traveling direction A is measured from the measurement position O is shown. The measurement position O is located at the center of the first lane (traveling lane) of the road 4 at a height of 1.5 meters from the road surface 4A.

As shown in FIG. 3, the road surface brightness of the illumination range R is relatively lower in the traveling side range RA than in the reverse driving side range RB. Therefore, on the road surface 4A, along the traveling direction A, the traveling side range RA of the low brightness portion where the road surface brightness is lower than the average road surface brightness and the reverse running side range RB of the high brightness portion where the road surface brightness is higher than the average road surface brightness And will exist alternately and continuously.

In this road surface luminance distribution, as shown in FIG. 3, when an obstacle T having a low reflectance exists in the traveling side range RA, the luminance contrast between the obstacle T and the road surface 4A becomes particularly small.
Therefore, when the driver of the vehicle 2 is looking at the reverse-way driving side range RB, which is a high-brightness location on the road surface, in the central view, an obstacle existing in the traveling side range RA, which is a low-brightness location located in the peripheral vision thereof. The timing until the driver visually recognizes the object T by peripheral vision is later than when the obstacle T is present in the reverse driving side range RB.

Therefore, in this road lighting fixture 1, the visibility of obstacles on the road surface in the peripheral vision of the driver is enhanced by setting an appropriate S / P ratio.

More specifically, human photoreceptor cells include cones that work in a relatively bright environment and rods that work in a relatively dark environment. The cones are concentrated near the fovea centralis of the retina and control so-called photopic vision, and the rods exist so as to surround the fovea centralis and control so-called scotopic vision. ing.
In photopic vision, the peak wavelength of spectroscopic vision efficiency is 555 nm, whereas in scotopic vision, the peak wavelength of spectroscopic vision efficiency is 507 nm, and scotopic vision has a shorter wavelength than that of photopic vision. It has high sensitivity to light.

On the other hand, the S / P ratio is defined by the ratio of scotopic brightness and photopic brightness.
The scotopic vision brightness is a value calculated by integrating the spectral luminosity factor of the scotopic vision with the spectral characteristics of the light emitting unit 18 of the road lighting fixture 1, and the photopic vision brightness is the spectroscopic vision of the photopic vision. It is a value calculated by integrating the spectral characteristics of the light emitting unit 18 with the sensitivity.
Therefore, when the S / P ratio is large, the scotopic brightness is larger than the photopic brightness, so that the illumination light emitted from the light emitting unit 18 contains a large amount of short-wavelength radiant energy. On the contrary, when the S / P ratio is small, the scotopic brightness is relatively smaller than the photopic brightness, so that the short wavelength radiant energy is relatively small in this illumination light.

In general, in an environment of mesopic vision, which is between bright and scotopic vision, not only cones that greatly contribute to central vision but also rods that greatly contribute to peripheral vision act on human vision. To do.
That is, since the rod contributes greatly to peripheral vision, the sensitivity to short-wavelength light is particularly increased, and the more short-wavelength radiant energy is contained in the illumination light, the higher the visibility of peripheral vision. As the S / P ratio increases, the illumination light contains a relatively large amount of radiant energy having a short wavelength. Therefore, by increasing the S / P ratio of the road luminaire 1, the visibility in peripheral vision is improved. You can do it. As described above, by enhancing the visibility of peripheral vision, it is possible to improve the visual workability such as the luminance discrimination threshold, the response time, and the recognition rate for detecting obstacles existing in the peripheral visual field.

However, in a mesopic vision environment, if the S / P ratio of the road luminaire 1 is simply increased, the short-wavelength radiant energy directly incident on the eye from the light emitting unit 18 increases, so that the driver sends the light emitting unit 18 to the light emitting unit 18. On the other hand, it becomes easy to feel unpleasant glare, which causes glare. Therefore, in this road lighting fixture 1, glare is suppressed as follows.

FIG. 4 is a diagram schematically showing the S / P ratio distribution of the light emitting portion 18 of the road lighting fixture 1 in the vertical plane including the traveling direction A (hereinafter, simply referred to as “vertical plane”).
In this figure, the downward direction of the road luminaire 1 in the vertical direction is the vertical angle θ = 0 °, the reverse travel direction B is the vertical angle θ = 90 °, and the traveling direction A is the vertical angle θ = 270 °. Further, the range Sa of the vertical angle θ1 (270 ° ≦ θ1 ≦ 0 °) corresponds to the emission range of the illumination light that illuminates the traveling side range RA of the road surface 4A. On the other hand, the range Sb of the vertical angle θ2 (0 ° ≦ θ2 ≦ 90 °) corresponds to the emission range of the illumination light that illuminates the reverse-way side range RB of the road surface 4A. However, the range of the vertical right angle θ corresponding to the emission range of the illumination light illuminating each of the traveling side range RA and the reverse running side range RB is only a specific example and may change depending on the design of the road luminaire 1. is there.

As shown in this figure, the S / P ratio distribution in the vertical plane is asymmetric rather than symmetric. That is, in this S / P ratio distribution, the S / P ratio on the traveling direction A side is the maximum S / P ratio (hereinafter, referred to as "maximum S / P ratio"). On the other hand, the S / P ratio on the side of the reverse driving direction B is a value smaller than the maximum S / P ratio.

Due to this S / P ratio distribution, the traveling side range RA of the illumination range R is illuminated with the illumination light having the maximum S / P ratio, so that the visibility when the traveling side range is viewed in the peripheral view is enhanced. As a result, when an obstacle T is present in the traveling side range RA, it is possible to suppress a delay in the time until the driver visually recognizes the obstacle T in the peripheral vision.

On the other hand, in the S / P ratio distribution, the S / P ratio on the reverse running direction B side is suppressed to a value smaller than the maximum S / P ratio. The driver's field of view of the vehicle 2 includes the surface of the light emitting portion 18 of the road lighting fixture 1 located in the traveling direction A when viewed from the driver, on the side of the reverse driving direction B. Therefore, by suppressing the S / P ratio on the side of the reverse driving direction B, the radiant energy of a short wavelength directly incident on the driver's eyes is suppressed, and the unpleasant glare felt from the light emitting unit 18 is reduced.

Further, in the road lighting fixture 1, the glare is suppressed, so that the attractiveness of the light emitting unit 18 visually recognized by the driver located on the side of the reverse driving direction B is prevented from being excessively lowered. There is.
Specifically, as shown in FIG. 4, in the S / P ratio distribution in the vertical plane, the value of the S / P ratio in the direction of the predetermined vertical perpendicularity θ3 is set to at least the S / P on the reverse running direction B side. The minimum S / P ratio among the ratios (hereinafter referred to as "minimum S / P ratio") is used. This vertical angle θ3 is a range corresponding to the glare zone. The glare zone is the area where you can feel the glare in the field of view. In this road lighting fixture 1, 70 ° ≦ θ3 ≦ 80 ° corresponds to the vertical angle θ3.
Then, in this S / P ratio distribution, on the side of the reverse running direction B, only the S / P ratio in the range of the vertical perpendicularity θ3 is set to the minimum S / P ratio, and the S / P ratio of the remaining portion is the minimum S / P. By maintaining a value larger than the ratio, it is possible to suppress an unpleasant glare in the glare zone while suppressing a decrease in attractiveness outside the glare zone.

By the way, in road lighting, the guidance effect of clearly indicating the alignment of the road to the driver is obtained by the light emission of each light emitting unit 18 of the road lighting fixtures 1 arranged along the road 4.
Then, according to this road lighting fixture 1, while suppressing glare, the attractiveness of the light emitting unit 18 seen from the driver located on the side of the reverse driving direction B is maintained, so that an unpleasant glare is felt. It is possible to realize road lighting that can obtain a guiding effect without any problems.

Generally, in the vertical plane, the light emission of the light emitting portion 18 in the vertical perpendicular range above the glare zone in the vertical direction is visible to some extent when the driver is located far from the road luminaire 1 in the reverse travel direction B. When approaching the road luminaire 1, the area is out of sight due to being blocked by the roof of the vehicle 2.
Therefore, even if the brightness in this range is increased on the light emitting surface of the light emitting unit 18, the visibility of the light emitting unit 18 from a distance is enhanced and guided while preventing the driver traveling in the vehicle 2 from feeling glare. The effect can be enhanced.

In the road lighting fixture 1, the brightness in the range of vertical perpendicularity θ4 (80 ° ≤ θ4 ≤ 90 °) is vertical to the range in the range located on the side of the light emitting surface of the light emitting unit 18 in the reverse traveling direction B. The brightness is higher than the brightness in the range (270 ° ≤ vertical perpendicularity θ <280 ° in the present embodiment) located on the side of the traveling direction A which is symmetrical with respect to the direction.
As a result, a higher guidance effect than that of a general road lighting fixture with a symmetrical light distribution is realized.

In this road luminaire 1, the S / P ratio in the range of the vertical angle θ1 is a value of 1.9 to 3.0, and the S / P ratio in the range of the vertical angle θ2 is a value of 1.0 to 3.0. Is set to. The S / P ratio is set to a value of 1.0 to 2.2 in the range of the vertical angle θ2 excluding the vertical angle θ4. The S / P ratio in the range of the vertical angle θ3 is set to a value of 1.0 to 1.9. Moreover, the S / P ratio in each range is set so that the difference between the S / P ratios of the vertical angle θ1 and the vertical angle θ3 is 0.3 or more. Further, the S / P ratio in the range of the vertical angle θ3 is set to a value smaller than the S / P ratio set in the vertical angle θ2 among the values of 1.0 to 1.9.

By setting these values in the S / P ratio distribution, the obstacle T is visually recognized even when the obstacle T existing in the low-brightness portion of the road surface 4A is located in the peripheral vision of the driver in the road lighting. It is possible to expect suppression of the time delay until, and while suppressing unpleasant glare in the glare zone, illumination that maintains the attractiveness of the light emitting portion 18 on the side of the reverse driving direction B is realized.
Further, by increasing the brightness in the range of the vertical angle θ4 (80 ° ≦ θ4 ≦ 90 °), the induction effect is greatly enhanced.

Further, in this road luminaire 1, the S / P ratio in the vertical plane is asymmetric with respect to the vertical angle θ = 0 °, so that when the driver runs backward on the road 4 in the reverse direction B, The color and glare of the light emitting unit 18 felt by the driver are different from those when traveling in the traveling direction A. As a result, the driver can easily notice that the vehicle is running in reverse, and the effect of preventing reverse driving can be obtained.

In the road lighting fixture 1, the S / P ratio distribution in the vertical plane and the brightness of the light emitting surface of the light emitting unit 18 shown in FIG. 4 are desired for each of the LED 16A and the LED 16B provided in the light source unit 14. This is achieved by using LEDs with the S / P ratio and light output of the above, and by using the glove 12 with increased light transmission in a predetermined range.

Specifically, in the road lighting fixture 1, so-called white LEDs having a wide emission wavelength range are used for the LEDs 16A and 16B. As described above, a white LED having an S / P ratio in the range of 1.9 to 3.0 is used for each of the plurality of LEDs 16A that illuminate the traveling direction A (more accurately, illuminate the traveling side range RA). Has been done. On the other hand, each of the plurality of LEDs 16B that illuminate the reverse-way direction B (more accurately, illuminate the reverse-way side range RB) is white in which the S / P ratio of the illumination light is in the range of 1.0 to 3.0. LEDs are used. At this time, a white LED having an S / P ratio of the LED 16A larger than the S / P ratio of the LED 16B is used for each of the LED 16A and the LED 16B.

Further, among the plurality of LEDs 16B, the LED 16Ba (FIG. 2) that contributes to light emission in the range of the vertical angle θ3 has a smaller S / P ratio than the other LEDs 16B, and the difference in the S / P ratio from the LED 16A is 0. A white LED that meets the conditions of .3 or higher is used.
Further, on the light emitting surface in the range of the vertical perpendicularity θ4, the light transmission in the range of the corresponding glove 12 is set to the light in the range of the glove 12 located on the side of the traveling direction A which is symmetrical with respect to the vertical direction. It is higher than the transparency and the brightness of the light emitting surface in the range of the vertical angle θ4 is increased.

If the S / P ratio distribution and brightness of the light source unit 14 are different from the S / P ratio distribution and brightness of the light emitting unit 18 due to the transmission through the globe 12, this difference is taken into consideration. , The S / P ratio used for the LEDs 16A, 16B, and 16Ba, and the light output are set.

As described above, according to the present embodiment, in the road lighting fixture 1, the light emitting unit 18 has the maximum S / P ratio in the vertical plane including the traveling direction A in the emission range of the light illuminating the traveling direction A. The configuration is S / P. More specifically, the light emitting unit 18 is configured so that the S / P ratio of the range illuminating the traveling side range RA in the illumination range R is the maximum S / P ratio.
As a result, the side in the traveling direction A is illuminated with the illumination light having the maximum S / P ratio, so that even if the traveling side range RA is located in the peripheral visual field of the driver, the visibility in the traveling side range RA is enhanced. .. Therefore, even if an obstacle T is present in the traveling side range RA, it is possible to suppress a delay in the time until the driver visually recognizes the obstacle T.
On the other hand, on the side of the reverse driving direction B, the S / P ratio is smaller than the maximum S / P ratio, so that unpleasant glare is suppressed.

Further, according to the present embodiment, the light emitting unit 18 has a range in which the S / P ratio in the range of the vertical angle θ3, which is the range corresponding to the glare zone in the vertical plane, faces at least the side in the reverse traveling direction B (the present embodiment). In the embodiment, the minimum S / P ratio is the smallest among 0 ° ≤ vertical angle θ ≤ 90 °).
As a result, unpleasant glare in the glare zone can be suppressed.

Further, according to the present embodiment, the light emitting surface of the light emitting unit 18 has a relationship in which the brightness in the range of the vertical angle θ4, which is a range further above the range of the vertical angle θ3 in the vertical direction, is symmetrical with respect to the range in the vertical direction. It is higher than the brightness of the portion on the side of the traveling direction A in.
As a result, the guiding effect of the road 4 due to the light emission of the light emitting unit 18 can be greatly enhanced as compared with a general road lighting fixture having a symmetrical light distribution, while suppressing unpleasant glare.

Further, according to the present embodiment, the difference between the maximum S / P ratio and the minimum S / P ratio is 0.3 or more.
As a result, an appropriate balance between the improvement of visibility in peripheral vision with respect to the side in the traveling direction A and the suppression of glare on the side in the reverse driving direction B can be obtained.

Further, according to the present embodiment, since the maximum S / P ratio is a value between 1.9 and 3.0, the visibility in peripheral vision with respect to the side in the traveling direction A is sufficiently ensured.

Further, according to the present embodiment, the S / P ratio (excluding the vertical angle θ4) and the minimum S / P ratio in the range facing the reverse driving direction B are set to 1.0 to 2.2. Since it is set, the attractiveness of the light emitting unit 18 as seen by the driver located on the side of the reverse driving direction B is maintained.

It should be noted that the above-described embodiment is merely an example of one aspect of the present invention, and can be arbitrarily modified and applied within the scope of the gist of the present invention.

For example, in the above-described embodiment, the induction effect is enhanced by increasing the brightness in the range of the vertical angle θ4 among the brightness of the light emitting surface of the light emitting unit 18. However, in a mesopic vision environment, the greater the S / P ratio, the greater the glare. Therefore, the induction effect may be enhanced by increasing the S / P ratio in the range of the vertical angle θ4.
In this case, for the S / P ratio in the range of the vertical angle θ4, a value larger than the S / P ratio of the vertical angle θ3 or the maximum S / P ratio set on the traveling direction A side can be used. ..
Furthermore, in the range facing the traveling direction A (270 ° ≤ vertical angle θ ≤ 0 ° in the above-described embodiment), the S / P ratio of the portion having a symmetric relationship with respect to the vertical angle θ4 in the vertical direction is determined. It can also be used for the S / P ratio in the range of the vertical angle θ4.

The present invention can also be applied to lighting of railroad tracks on which railroad vehicles travel.

1 Road lighting fixtures (lighting fixtures)
2 Vehicle 4 Road 4A Road surface 10 Instrument body 12 Gloves 14 Light source unit 18 Light emitting unit A Travel direction B Reverse travel direction R Illumination range RA Travel side range RB Reverse drive side range T Obstacle θ Vertical right angle θ 1 Vertical right angle (side in the direction of travel) Range facing)
θ2 Vertical right angle (range facing the side in the reverse direction)
θ3 Vertical angle (range corresponding to glare zone)
θ4 Vertical angle (range located above the glare zone in the vertical direction)

Claims (7)

In the lighting fixtures that illuminate the road on which the vehicle travels
A light emitting unit that illuminates the traveling direction of the vehicle and the direction opposite to the traveling direction is provided.
When the ratio of the scotopic brightness and the photopic brightness of the light emitting portion is defined as the S / P ratio,
The light emitting unit
Luminaires S / P ratio of the light emitting portion for illuminating the traveling direction, and greater than S / P ratio of all the light emitting portion for illuminating the direction opposite to the traveling direction. The light emitting unit
It is characterized in that the S / P ratio in a predetermined range corresponding to the glare zone in the vertical plane including the traveling direction is at least the minimum S / P ratio in the range facing the opposite direction side. The lighting fixture according to claim 1. The light emitting surface of the light emitting unit is
The feature is that the brightness of the range above the predetermined range corresponding to the glare zone in the vertical plane is larger than the brightness of the portion on the side in the traveling direction that is symmetrical with respect to the range in the vertical direction. The lighting equipment according to claim 2. The light emitting unit
S / P ratio in the range of vertical ways improve side of the predetermined range corresponding to the Gureazon in said vertical plane, S / P ratio greater than the predetermined range corresponding to the Gureazon, the largest S / P ratio The lighting apparatus according to claim 2, wherein the value is equal to or equal to the S / P ratio of the portion on the side in the traveling direction that is symmetrical with respect to the vertical direction. The light emitting unit
Within the range facing the side of the reverse, S / P ratio in the range excluding the range of vertical ways improve side of the predetermined range corresponding to the grayed Reazon is a 1.0 to 2.2, and wherein the The lighting fixture according to any one of claims 1 to 4. And maximum of S / P ratio, the difference between the minimum of S / P ratio, the lighting device according to any of claims 2-5, characterized in that less than 0.3. Largest S / P ratio, the luminaire according to the is, any one of the preceding claims, characterized in that 1.9 to 3.0.

Images