JP6111034B2 - Tunnel lighting method - Google Patents

Description

  The present invention relates to a lighting method of a lighting facility installed in a tunnel of a road facility such as a highway or a toll road, and in order to inform a vehicle driver or the like of a traffic jam or an accident by such a lighting method, It is related with the lighting method for calling out or issuing a warning.

Normally, traffic lights at intersections indicate “Progress” with a green light, “Caution” with a yellow light, and “Stop” with a red light, and the vehicle driver operates the vehicle based on this to maintain safety. The
In addition, at road junctions, etc., the presence is clearly indicated by blinking yellow signals called blinker lights, etc., in order to show the presence of the road well, and the driver is alerted.

  Also, conventional light sources for tunnel illumination use discharge lamps such as low-pressure sodium lamps, HID lamps, fluorescent lamps, etc. Particularly, HID lamps require several minutes or more to restart once they are extinguished. It was impossible to make it blink, and the lighting was only maintained at a predetermined illumination level.

An illumination device or the like including a light-emitting diode light source described in the following patent document can reduce power consumption and can achieve brightness adjustment with a simple configuration.
The light-emitting diode light source includes a color light emitting unit that emits light of a plurality of spectral power distributions and variably exhibits a predetermined color tone, and a lightness light emitting unit for adjusting the lightness. Includes a red light emitting diode, a green light emitting diode, and a blue light emitting diode, and the light emitting section includes a white light emitting diode, and the light amount emitted from the color light emitting section and the light amount emitted from the light emitting section are independent. Can be changed.

JP 2010-257615 A

  In the present invention, unlike the above-described conventional invention, it is not merely intended to adjust the brightness and color tone, but to convey the situation in the road tunnel, that is, the vehicle is jammed, traffic accidents, under construction or fire. It is an object of the present invention to provide a lighting method that should be a display, a signal, a sign, or the like for alerting or giving a warning that can easily convey the various situations to the vehicle driver in advance.

Conventionally, information boards, guidance display boards, etc. are installed in the tunnel, but they are installed at intervals of several hundred meters, and the drivers present in the area between these display boards etc. On the other hand, it is difficult to provide or notify information such as traffic jam information and accident information using these facilities.
Therefore, it is an object of the present invention to provide an illumination method that should be a signal or sign that can convey the situation in the tunnel as described above.

  In general, the vehicle driver is driving while reflecting the meaning of the green, yellow, and red signals of traffic lights at daily intersections. Therefore, the meaning of the yellow signal and the red signal is used for road tunnels. It is an object of the present invention to enable alerting and warning by applying this light color control to the entire lighting equipment by applying to the lighting equipment itself.

  Furthermore, the lighting device suddenly changes or changes from normal white lighting to yellow or red lighting, which is particularly noticeable in the case of red, but gives the vehicle driver a sense of surprise and fear. In such a case, the driver may panic and conversely cause an accident, so the selection of hue, saturation, brightness, etc. is also a very important issue.

The present inventors have repeated a wide variety of experiments so far, and also collected a large number of data such as evaluation questionnaires for vehicle drivers, whereby white light emitting diodes and yellow light emitting diodes or white light emitting diodes and red light emitting diodes are collected. By combining with a light emitting diode, an illumination method capable of issuing an optimal alert and warning could be devised.
The lighting method according to the present invention can be applied not only in a road tunnel but also to a road lighting facility installed in a normal road light section.
In addition, by applying the lighting method according to the present invention to entrance lighting installed over several hundred meters from the tunnel entrance, not only the driver traveling in the tunnel but also traveling in front of the tunnel entrance to enter the tunnel. The same information can be provided to the driver.

  In order to solve the above problems, a first aspect of the present invention is an illumination method for performing tunnel illumination by arranging a large number of illumination devices using white light-emitting diodes as light sources at appropriate intervals, and the frequency of illumination light is reduced. The duty ratio of the waveform of the illumination light is in the range of 0.4: 0.6 to 0.7: 0.3 in the range of 0.5 to 2.0 Hz, and the luminous flux of the white light emitting diode is defined as the first half of the waveform. The tunnel illumination method is characterized by calling attention to a vehicle driver or the like who passes by changing at a predetermined light flux ratio in the second half.

  According to a second aspect of the present invention, in the first aspect, the predetermined luminous flux ratio is 0.4 to 0.6 of the second half or first half of the waveform with respect to the first half or second half of the waveform 1.0. A tunnel illumination method characterized by being within a range.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the white light emitting diode has a first chromaticity point x = 0.330, y = 0.318, and a second chromaticity point x = 0. .330, y = 0.360, the third chromaticity point x = 0.356, y = 0.351, the fourth chromaticity point x = 0.361, y = 0.385. There is a tunnel illumination method characterized by that.

  According to a fourth aspect of the present invention, there is provided an illumination method for performing tunnel illumination by arranging a large number of illumination devices having white light emitting diodes and yellow light emitting diodes as light sources at appropriate intervals, and the frequency of illumination light is set to 0.5 to In the range of 2.0 Hz, the duty ratio of the waveform of the illumination light is in the range of 0.4: 0.6 to 0.7: 0.3, and the luminous flux of the white light emitting diode and the yellow light emitting diode is defined as the first half of the waveform. The tunnel illumination method is characterized in that the vehicle driver or the like is alerted by changing a predetermined luminous flux ratio in the second half and turning on a yellow light emitting diode in the first half or the second half of the waveform.

  According to a fifth aspect of the present invention, in the fourth aspect, the luminous flux ratio between the white light emitting diode in the first half or the second half of the waveform and the yellow light emitting diode is 1.0: 0, and the white light emitting diode in the second half or the first half of the waveform is yellow. A tunnel illumination method characterized in that a light flux ratio with a light emitting diode is in a range of 1.0: 0.7 to 1.0: 1.0.

  According to a sixth aspect of the present invention, in the fourth aspect of the invention, a luminous flux ratio of the white light emitting diode in the first half or the latter half of the waveform to the yellow light emitting diode is 1.0: 0, and the white light emitting diode in the second half or the first half of the waveform is yellow. The tunnel illumination method is characterized in that the luminous flux ratio to the light emitting diode is in the range of 0.2: 0.8 to 0.4: 0.6.

  According to a seventh aspect of the present invention, in the invention according to any one of the fourth to sixth aspects, the white light emitting diode has a first chromaticity point x = 0.330, y = 0.318, and a second color. From degree point x = 0.330, y = 0.360, third chromaticity point x = 0.356, y = 0.351, fourth chromaticity point x = 0.361, y = 0.385 The yellow light emitting diode has a first chromaticity point x = 0.522, y = 0.460, a second chromaticity point x = 0.532, y = 0.467, a third chromaticity range The tunnel illumination method is characterized by being in a chromaticity range including chromaticity point x = 0.589, y = 0.393, fourth chromaticity point x = 0.603, and y = 0.398.

  An eighth aspect of the present invention is an illumination method for performing tunnel illumination by arranging a large number of illumination devices using white light emitting diodes and red light emitting diodes as light sources at appropriate intervals, and the frequency of illumination light is set to 0.5 to In the range of 2.0 Hz, the duty ratio of the waveform of the illumination light is in the range of 0.4: 0.6 to 0.7: 0.3, and the luminous flux of the white light emitting diode and the red light emitting diode is defined as the first half of the waveform. The tunnel illumination method is characterized in that a warning is given to a vehicle driver or the like passing by changing a predetermined luminous flux ratio in the second half and turning on a red light emitting diode in the first half or the second half of the waveform.

  According to a ninth aspect of the present invention, in the eighth aspect, the luminous flux ratio between the white light emitting diode in the first half or the second half of the waveform and the red light emitting diode is 1.0: 0, the white light emitting diode in the second half or the first half of the waveform and the red color. The tunnel illumination method is characterized in that the luminous flux ratio to the light emitting diode is in the range of 1.0: 0.3 to 1.0: 0.5.

  According to a tenth aspect of the present invention, in the eighth aspect of the present invention, a luminous flux ratio between the white light emitting diode in the first half or the second half of the waveform and the red light emitting diode is 1.0: 0, and the white light emitting diode in the second half or the first half of the waveform is red. The tunnel illumination method is characterized in that the light flux ratio with the light emitting diode is in the range of 0.5: 0.5 to 0.7: 0.3.

  An eleventh aspect of the present invention is the light emitting diode according to any one of the eighth to tenth aspects, wherein the white light emitting diode has a first chromaticity point x = 0.330, y = 0.318, and a second chromaticity point. A color consisting of x = 0.330, y = 0.360, third chromaticity point x = 0.356, y = 0.351, fourth chromaticity point x = 0.361, y = 0.385. The red light emitting diode has a first chromaticity point x = 0.659, y = 0.321, a second chromaticity point x = 0.680, y = 0.320, and a third chromaticity point. The tunnel illumination method is characterized by being in a chromaticity range including a point x = 0.85, y = 0.295, a fourth chromaticity point x = 0.708, and y = 0.292.

In the first aspect of the present invention, the lighting equipment is composed of only white light emitting diodes, and the white light emitting diodes are changed at a frequency and duty ratio within a predetermined range.
That is, the frequency of the illumination light is in the range of 0.5 to 2.0 Hz, the duty ratio of the waveform of the illumination light is in the range of 0.4: 0.6 to 0.7: 0.3, The light beam can be changed to a white light / dark state by changing the light beam at a predetermined light beam ratio in the first half and the second half of the waveform.

Thereby, it is possible to call attention to a vehicle driver or a passenger who passes by.
As a reason for this alerting, there are cases such as traffic jams in the tunnel and road construction.
The vehicle driver can determine whether there is traffic in the tunnel or whether or not construction is in progress by displaying the light / dark state of the white light-emitting diodes, thereby raising awareness of driving attention.

According to a second aspect of the present invention, the predetermined luminous flux ratio is limited in the first aspect.
That is, by setting the light beam ratio of the light waveform to the light flux of the first half or the second half of the waveform and the light flux of the second half or the first half of the waveform within the range of 0.4 to 0.6, the predetermined frequency and the predetermined frequency In combination with the duty ratio, it is possible to alert the driver appropriately.

  In the third embodiment of the present invention, the white light emitting diode is connected to the first chromaticity point x = 0.330, y = 0.318, the second chromaticity point x = 0.330, y = 0.360, By making the chromaticity range consisting of the third chromaticity point x = 0.356, y = 0.351, the fourth chromaticity point x = 0.361, y = 0.385, the vehicle driver feels uncomfortable. It is possible to call attention while ensuring practical efficiency.

In the 4th thing of this invention, the said lighting installation consists of a white light emitting diode and a yellow light emitting diode.
That is, the frequency of illumination light is in the range of 0.5 to 2.0 Hz, the duty ratio of the waveform of illumination light is in the range of 0.4: 0.6 to 0.7: 0.3, and the white light emitting diode The yellow light-emitting diode light flux is changed at a predetermined light flux ratio in the first half and the second half of the waveform, so that a predetermined yellow blinking state can be obtained based on white light, and attention should be paid to vehicle drivers, etc. Can be aroused.

In the fifth aspect of the present invention, the yellow light emitting diode is additionally blinked, and the luminous flux ratio between the white and yellow light emitting diodes is limited.
That is, the luminous flux ratio between the white light emitting diode and the yellow light emitting diode in the first half or the second half of the waveform is 1.0: 0, and the luminous flux ratio between the white light emitting diode and the yellow light emitting diode in the second half or the first half of the waveform is 1.0: 0.7. By setting within the range of -1.0: 1.0, the yellow light emitting diode is additionally blinked.
That is, the white light emitting diode is always lit and the yellow light emitting diode blinks under a predetermined condition.
Such additional blinking of the yellow light-emitting diode makes it possible to notify the vehicle driver of vehicle traffic congestion in the tunnel or in front of the road and information during construction.

In the sixth aspect of the present invention, unlike the fifth aspect of the invention, the white light emitting diode and the yellow light emitting diode are turned on alternately by changing the lighting conditions of the first half and the second half of the light waveform instead of the additional blinking of the yellow light emitting diode. Is.
That is, the luminous flux ratio between the white light emitting diode and the yellow light emitting diode in the first half or the second half of the waveform is 1.0: 0, and the luminous flux ratio between the white light emitting diode and the yellow light emitting diode in the second half or the first half of the waveform is 0.2: 0.8. By setting within the range of -0.4: 0.6, both are alternately lit.
As a result, the vehicle driver recognizes vehicle congestion in the tunnel or in front of the road and information during construction, and tries to drive carefully.

  According to a seventh aspect of the present invention, a white light emitting diode is connected to the first chromaticity point x = 0.330, y = 0.318, the second chromaticity point x = 0.330, y = 0.360, The chromaticity range is composed of the third chromaticity point x = 0.356, y = 0.351, the fourth chromaticity point x = 0.361, y = 0.385, and the yellow light emitting diode is used as the first chromaticity point. Point x = 0.522, y = 0.460, second chromaticity point x = 0.532, y = 0.467, third chromaticity point x = 0.589, y = 0.393, By making the chromaticity range consisting of four chromaticity points x = 0.603, y = 0.398, alerting the vehicle driver with appropriate chromaticity without causing the driver to feel uncomfortable and not to be surprised It is something that can be done.

In the eighth aspect of the present invention, the lighting equipment is composed of a white light emitting diode and a red light emitting diode.
That is, the frequency of illumination light is in the range of 0.5 to 2.0 Hz, the duty ratio of the waveform of illumination light is in the range of 0.4: 0.6 to 0.7: 0.3, and the white light emitting diode The light flux of the red light-emitting diode is changed at a predetermined light flux ratio between the first half and the second half of the waveform, so that a predetermined red blinking state can be obtained based on white light, and a warning can be issued to a vehicle driver or the like. It can be done.

In the ninth aspect of the present invention, the red light emitting diode is additionally blinked, and the luminous flux ratio between the white and red light emitting diodes is limited.
That is, the luminous flux ratio between the white light emitting diode and the red light emitting diode in the first half or the second half of the waveform is 1.0: 0, and the luminous flux ratio between the white light emitting diode and the red light emitting diode in the second half or the first half of the waveform is 1.0: 0.
By setting it within the range of 3 to 1.0: 0.5, the red light emitting diode is additionally blinked based on white light.

Such additional blinking of the red light emitting diode enables the vehicle driver to be notified of a serious trouble such as a traffic accident or fire in the tunnel or in front of the road.
When this red light emitting diode is used, unlike the above yellow light emitting diode, the hue is intense, so there is a high possibility of causing surprise, anxiety and fear to the vehicle driver. In addition, the luminous flux ratio is set smaller than that of the yellow light emitting diode.

In the tenth aspect of the present invention, unlike the invention of claim 9, the lighting condition of the white light emitting diode and the red light emitting diode is changed alternately between the first half and the second half of the light waveform instead of the additional blinking of the red light emitting diode. Is.
That is, the luminous flux ratio between the white light emitting diode and the red light emitting diode in the first half or the second half of the waveform is 1.0: 0, and the luminous flux ratio between the white light emitting diode and the red light emitting diode in the second half or the first half of the waveform is 0.5: 0.5. By setting within the range of -0.7: 0.3, both are alternately lit.
As a result, the vehicle driver can detect serious troubles such as traffic accidents and fires in the tunnel or in front of the road, and pay close attention to the driving, or take actions to prepare for or evacuate from the vehicle. It will be taken.

Here, if it adds about the above-mentioned additional blink or alternate lighting of a yellow or red light emitting diode, these additional blinks or alternate lighting has each characteristic.
That is, the additional blinking can be turned on while maintaining the lighting of the white light emitting diode as the original traffic lighting facility, but it corresponds to the case where the yellow light emitting diode or the red light emitting diode is additionally turned on. Power consumption increases.
On the other hand, in the alternate lighting, power consumption can be kept constant throughout the first half and the second half of the optical waveform, but the color rendering properties are inevitably lowered in the second half of the optical waveform.
For this reason, additional flashing and alternate lighting are selected and determined in consideration of the illumination level, power consumption, required color rendering properties, and the like. It is specified and limited to a certain numerical range described in the claims.
Further, in the above claims, there is a reference and specification to the first half or the second half of the waveform, but the first half and the second half are convenient divisions, and the waveform is repeatedly generated. The limitation may be made on either side of the first half or the second half, and both are referred to in the meaning including both the first half and the second half.

According to an eleventh aspect of the present invention, a white light emitting diode has a first chromaticity point x = 0.330, y = 0.318, a second chromaticity point x = 0.330, y = 0.360, The chromaticity range is composed of the third chromaticity point x = 0.356, y = 0.351, the fourth chromaticity point x = 0.361, y = 0.385, and the red light emitting diode is the first chromaticity point. Point x = 0.659, y = 0.321, second chromaticity point x = 0.680, y = 0.320, third chromaticity point x = 0.585, y = 0.295 As a chromaticity range consisting of four chromaticity points x = 0.708 and y = 0.292, a range that can calmly deal with serious troubles such as accidents and fires without surprise to the vehicle driver receiving the warning The warning can be performed in an appropriate chromaticity range.
As a result, a warning can be issued without causing the driver to panic.

It is a conceptual diagram which shows the state which installed the lighting equipment which applies the lighting method which concerns on this invention in the road tunnel. It is a conceptual diagram which shows the state which installed the lighting equipment which applies the lighting method which concerns on this invention in the light part of the road. It is a conceptual diagram of one illuminating device used for the said illuminating equipment to which the illuminating method which concerns on this invention is applied. It is a chromaticity diagram which shows the optimal chromaticity range of the white light emitting diode used in this invention. It is a chromaticity diagram which shows the optimal chromaticity range of the yellow light emitting diode used in this invention. It is a chromaticity diagram which shows the optimal chromaticity range of the red light emitting diode used in this invention. It is a chart figure which shows each aspect of the illumination method which concerns on this invention. It is a graph which shows the additional blinking state of the white light emitting diode which concerns on this invention, and a red light emitting diode. It is a graph which shows the alternate lighting state of the white light emitting diode which concerns on this invention, and a red light emitting diode.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a conceptual diagram showing a state in which lighting equipment to which the lighting method according to the present invention is applied is installed in a road tunnel.
On the inner peripheral wall surfaces on both sides of the tunnel T through which the road R passes, a large number of lighting devices L are arranged at predetermined intervals.
As will be described later, each of these lighting devices L is provided with a white light emitting diode, a yellow light emitting diode, and a red light emitting diode.

In the present invention, the white light emitting diode L, the yellow light emitting diode, and the red light emitting diode disposed in these lighting devices L blink and change in luminous flux, whereby the white, yellow, and red hues blink (or light and dark). Can be generated.
That is, blinking only with white light emitting diodes (a part of white light emitting diodes can be blinked or dimmed to be in a light / dark state, where the blinking includes a light / dark change, and the same applies hereinafter), white. It is possible to generate yellow blinking by the cooperation of the light emitting diode and the yellow light emitting diode and red blinking by the cooperation of the white light emitting diode and the red light emitting diode.

  In this way, white blinking or yellow blinking can be used as an alert to notify the vehicle driver of traffic congestion information and accident information in the tunnel, and it is also extremely serious such as traffic accidents and fires. When trouble occurs, the serious trouble can be warned by flashing red.

FIG. 2 is a conceptual diagram showing a state in which lighting equipment to which the lighting method according to the present invention is applied is installed in a light part of a road.
The lighting equipment to which the lighting method according to the present invention is applied can be applied not only to the inside of the tunnel but also to a light portion of a road as a unit with a predetermined section.
It can be used as an alert to notify the driver of traffic jams and accidents ahead of the road, or as a warning when a serious accident such as a road accident or fire has occurred. It is possible to display blinking white light emitting diode, blinking yellow light emitting diode, and further blinking red light emitting diode in the section.

FIG. 3 is a conceptual diagram of one lighting device used for the lighting equipment to which the lighting method according to the present invention is applied.
A large number of the lighting devices L are installed at appropriate intervals in a tunnel or a light part of a road.
The lighting device L is provided with a substrate B on which light emitting diodes are mounted. White light emitting diodes (W) are arranged in a row on the upper and lower sides of the substrate B in the figure, and yellow light emitting diodes (Y) are arranged at the center thereof. And red light emitting diodes (R) are alternately arranged in an appropriate number.

Only white light-emitting diodes are used for white blinking.
In the light waveform of the illumination light, the light beam in the first half of the waveform is set to 1.0, the light beam in the second half of the waveform is set to 0.4 to 0.6, and light and darkness can be generated in the white light. It is possible to call attention without giving the driver a sense of incongruity or causing anxiety.
In this example, the light flux in the first half of the waveform is set to 1.0 and the light flux in the second half of the waveform is dropped to make the light and dark state. However, the same applies to the first half and the second half of the waveform. The point that it can be reversed is exactly the same in the following cases, and a reference to this will be omitted below).

Next, in order to alert yellow blinking, the lighting device L uses white light emitting diodes (W) on both upper and lower sides and yellow light emitting diodes (Y) arranged in the center.
There are two ways to produce this yellow blink.
One is to additionally blink the yellow light emitting diode (Y) while keeping the white light emitting diode (W) lit (additional blinking).
The other method is to turn on the white light emitting diode (W) and the yellow light emitting diode (Y) alternately. When the yellow light emitting diode is turned on, the white light emitting diode is dimmed (partly extinguished or dimmed). ) And returning the white light emitting diode to the original luminous intensity when the yellow light emitting diode is turned off (alternate lighting).

In the case of additional blinking, the duty ratio of the illumination light waveform is 0.4: 0.6 to 0.7: 0.3, and the blinking frequency of the yellow light emitting diode (Y) is within the range of 0.5 to 2.0 Hz. And
In the present invention, the luminous flux ratio between the white light emitting diode and the yellow light emitting diode in the first half of the waveform is 1.0: 0, and the luminous flux ratio between the white light emitting diode and the yellow light emitting diode in the second half of the waveform is 1.0: 0.7. To 1.0: 1.0.
Thereby, it is possible to alert the driver without causing anxiety or the like.

On the other hand, in the case of alternate lighting, white light emitting diodes and yellow light emitting diodes are alternately lit, and when the yellow light emitting diodes are lit, a part of the white light emitting diodes is dimmed (partly extinguished or dimmed). Set to.
In this case, the luminous flux ratio between the white light emitting diode and the yellow light emitting diode in the first half of the waveform is 1.0: 0, and the luminous flux ratio between the white light emitting diode and the yellow light emitting diode in the second half of the waveform is 0.2: 0.8. Within the range of ~ 0.4: 0.6.
As a result, similarly to the above, it is possible to alert the vehicle driver or the like without causing anxiety or the like.

Next, when the warning of blinking red is given, the lighting device L uses the white light emitting diodes (W) on both the upper and lower sides and the red light emitting diodes (R) arranged in the center.
As above, there are two ways to produce this red flashing.
One is to make the red light emitting diode (R) blink additionally (additional blinking) while the white light emitting diode (W) is kept on.
The other method is to turn on the white light emitting diode (W) and the red light emitting diode (R) alternately. When the red light emitting diode is turned on, the white light emitting diode is dimmed (partly turned off or dimmed). ) And returning the white light emitting diode to the original luminous intensity when the red light emitting diode is turned off (alternate lighting).

In the case of additional flashing, the duty ratio of the waveform of the illumination light ranges from 0.4: 0.6 to 0.7: 0.3, and the flashing frequency of the red light emitting diode (Y) ranges from 0.5 to 2.0 Hz. Within.
In the present invention, the luminous flux ratio between the white light emitting diode and the red light emitting diode in the first half of the waveform is 1.0: 0, and the luminous flux ratio between the white light emitting diode and the red light emitting diode in the second half of the waveform is 1.0: 0. The range is 3 to 1.0: 0.5.
Thereby, it is possible to give a warning without causing a fear of the vehicle driver or the like.

On the other hand, in the case of alternate lighting, the white light emitting diode and the red light emitting diode are alternately lit, and when the red light emitting diode is lit, the white light emitting diode is dimmed (partially turned off or dimmed). To do.
In this case, the luminous flux ratio between the white light emitting diode and the red light emitting diode in the first half of the waveform is 1.0: 0, and the luminous flux ratio between the white light emitting diode and the red light emitting diode in the second half of the waveform is 0.5: 0.5. To 0.7: 0.3.
As a result, similarly to the above, it is possible to give a warning without causing a fear of the vehicle driver or the like.

FIG. 4 is a chromaticity diagram showing the optimum chromaticity range of the white light emitting diode used in the present invention.
In the figure, ranks c1 and c2 surrounded by a thick line indicate the optimum chromaticity range. That is, it is a range surrounded by four chromaticity points of circled numbers 1 to 4.
The chromaticity points x and y indicated by the ranks c1 and c2 shown in this figure are as shown in Table 1 below.

FIG. 5 is a chromaticity diagram showing the optimum chromaticity range of the yellow light-emitting diode used in the present invention.
In the figure, an area of rank L surrounded by a bold line indicates the optimum chromaticity range.
The chromaticity points x and y indicated by the rank L shown in this figure are as shown in Table 2 below.

FIG. 6 is a chromaticity diagram showing the optimum chromaticity range of the red light emitting diode used in the present invention.
In the figure, the area of rank Rp surrounded by a thick line indicates the optimum chromaticity range.
The chromaticity points x and y indicated by the rank Rp shown in this figure are as shown in Table 3 below.

FIG. 7 is a chart showing each aspect of the illumination method according to the present invention described above.
The lighting device L according to the present invention includes a white light emitting diode (W), a yellow light emitting diode (Y), and a red light emitting diode (R). By these blinking and dimming, white blinking, yellow blinking, Alternatively, red flashing can be generated, and a warning or warning can be given to a passing vehicle driver or the like.

As can be clearly seen from the first and second steps in the broken line frame in this figure, in the case of alerting (attention level), white bright and dark flashing, yellow additional flashing and yellow alternate lighting are performed, and in the case of warning level In addition, warning and warning can be given to the vehicle driver or the like by red flashing and alternate red lighting.
In normal times, color temperature control can be performed as shown on the leftmost side of the figure.

This color temperature control uses a white light emitting diode and a red light emitting diode.
Then, the luminous flux of the white light emitting diode is set to 1.0, and the luminous flux of the red light emitting diode is adjusted within a range of 0 to 0.2 to control the correlated color temperature within a range of 3000K to 6700K.
By controlling the correlated color temperature within this range, comfortable driving conditions can be provided to the vehicle driver and passengers according to natural conditions such as season, time, and weather.

A list of these various control conditions described above is summarized in Table 4 below.
Table 4 is a list of control conditions in the illumination method according to the present invention described above.

Finally, an example of additional blinking and alternate lighting in the lighting method according to the present invention will be briefly described with reference to the drawings.
FIG. 8 is a chart showing additional blinking of the white light emitting diode and the red light emitting diode according to the present invention.
In this figure, the duty ratio is 0.5, the luminous flux ratio between the white light emitting diode and the red light emitting diode in the first half of the waveform is 1.0: 0, and the luminous flux ratio between the white light emitting diode and the red light emitting diode in the second half of the waveform is 1. A display with a blinking frequency of 1.0 Hz is displayed in the range of 0: 0.3 to 1.0: 0.5.
Thereby, red blinking can be obtained.

FIG. 9 is a chart showing alternate lighting of the white light emitting diode and the red light emitting diode according to the present invention.
As can be seen clearly in this figure, the luminous flux ratio between the white light emitting diode and the red light emitting diode in the first half of the waveform is 1.0: 0, and the luminous flux ratio between the white light emitting diode and the red light emitting diode in the second half of the waveform is 0.5: 0.5. In the range of 0.7: 0.3, red flashing can be obtained.
These blinking frequencies are preferably in the range of 0.5 to 2.0 Hz as described above.

As mentioned above, although embodiment of the illumination method which concerns on this invention was described, in this invention, the form can be variously changed as follows.
In the lighting equipment to which the lighting method according to the present invention is applied, the arrangement interval and number of lighting devices used in the lighting equipment can be set freely, and the length of the tunnel or the length of one set section of the road It can be determined appropriately depending on the situation.
The installation position of the lighting device installed on the inner wall surface of the tunnel can be set freely.

Even in individual lighting devices, the arrangement of white light emitting diodes, yellow light emitting diodes and red light emitting diodes is completely free. White light emitting diodes are arranged on both the upper and lower sides, and one yellow light emitting diode and one red light emitting diode are arranged between them. They can be arranged in four rows one by one, and can be arranged in four rows of white light emitting diodes, yellow light emitting diodes, white light emitting diodes and red light emitting diodes from the top, and the arrangement method is completely free.
In short, any arrangement may be used as long as the light emitting diodes of the three colors within the setting range specified in the claims are provided.
Further, as described above, in the various embodiments described above, that is, in alerting and warning by white light / dark, yellow blinking, red blinking, etc., it is also possible to easily carry out by reversing the first half and the second half of each waveform. is there.

  As described above, in the present invention, by using light emitting diodes of three colors of white, yellow, and red, extremely appropriate attention is given by the blinking or dimming, the specification of the chromaticity range, and the specification and limitation of the blinking frequency, etc. It was possible to propose a lighting method that can provoke and warn.

L Lighting device W White light emitting diode Y Yellow light emitting diode R Red light emitting diode R Road T Tunnel

Claims (4)

An illumination method for performing tunnel illumination by arranging a large number of illumination devices having light sources of white light emitting diodes and yellow light emitting diodes at appropriate intervals,
The white light emitting diode has a first chromaticity point x = 0.330, y = 0.318, a second chromaticity point x = 0.330, y = 0.360, a third chromaticity point x = 0. 356, y = 0.351, the fourth chromaticity point x = 0.361, y = 0.385, the yellow light emitting diode has the first chromaticity point x = 0.522, y = 0.460, second chromaticity point x = 0.532, y = 0.467, third chromaticity point x = 0.589, y = 0.393, fourth chromaticity point x = 0 .603, y = 0.397, in the chromaticity range
The frequency of illumination light is in the range of 0.5 to 2.0 Hz, and the duty ratio of the waveform of illumination light is in the range of 0.4: 0.6 to 0.7: 0.3. By changing the luminous flux of the light-emitting diode at a predetermined luminous flux ratio in the first half and the second half of the waveform, and turning on the yellow light-emitting diode in the first half or the second half of the waveform , it is possible to alert the vehicle driver etc. to pass ,
The luminous flux ratio between the white light emitting diode and the yellow light emitting diode in the first half or the second half of the waveform is 1.0: 0, and the luminous flux ratio between the white light emitting diode and the yellow light emitting diode in the second half or the first half of the waveform is 1.0: 0.7 to 1. Tunnel illumination method characterized by being in the range of 0.0: 1.0 . An illumination method for performing tunnel illumination by arranging a large number of illumination devices having light sources of white light emitting diodes and yellow light emitting diodes at appropriate intervals,
The white light emitting diode has a first chromaticity point x = 0.330, y = 0.318, a second chromaticity point x = 0.330, y = 0.360, a third chromaticity point x = 0. 356, y = 0.351, the fourth chromaticity point x = 0.361, y = 0.385, the yellow light emitting diode has the first chromaticity point x = 0.522, y = 0.460, second chromaticity point x = 0.532, y = 0.467, third chromaticity point x = 0.589, y = 0.393, fourth chromaticity point x = 0 .603, y = 0.397, in the chromaticity range
The frequency of illumination light is in the range of 0.5 to 2.0 Hz, and the duty ratio of the waveform of illumination light is in the range of 0.4: 0.6 to 0.7: 0.3. By changing the luminous flux of the light-emitting diode at a predetermined luminous flux ratio in the first half and the second half of the waveform, and turning on the yellow light-emitting diode in the first half or the second half of the waveform, it is possible to alert the vehicle driver etc. to pass,
The luminous flux ratio between the white light emitting diode and the yellow light emitting diode in the first half or the second half of the waveform is 1.0: 0, and the luminous flux ratio between the white light emitting diode and the yellow light emitting diode in the second half or the first half of the waveform is 0.2: 0.8 to 0. 4: A tunnel illumination method characterized by being in a range of 0.6 . An illumination method for performing tunnel illumination by arranging a large number of illumination devices having light sources of white light emitting diodes and red light emitting diodes at appropriate intervals,
The white light emitting diode has a first chromaticity point x = 0.330, y = 0.318, a second chromaticity point x = 0.330, y = 0.360, a third chromaticity point x = 0. 356, y = 0.351, the fourth chromaticity point x = 0.361, y = 0.385, and the red light emitting diode has the first chromaticity point x = 0.659, y = 0.321, second chromaticity point x = 0.680, y = 0.320, third chromaticity point x = 0.685, y = 0.295, fourth chromaticity point x = 0 .708, y = 0.292.
The frequency of illumination light is in the range of 0.5 to 2.0 Hz, and the duty ratio of the waveform of illumination light is in the range of 0.4: 0.6 to 0.7: 0.3. By changing the luminous flux of the light emitting diode at a predetermined luminous flux ratio in the first half and the second half of the waveform, and turning on the red light emitting diode in the first half or the second half of the waveform, a warning can be issued to a vehicle driver or the like passing through ,
The luminous flux ratio between the white light emitting diode and the red light emitting diode in the first half or the second half of the waveform is 1.0: 0, and the luminous flux ratio between the white light emitting diode and the red light emitting diode in the second half or the first half of the waveform is 1.0: 0.3-1. Tunnel illumination method characterized by being in a range of 0.0: 0.5 . An illumination method for performing tunnel illumination by arranging a large number of illumination devices having light sources of white light emitting diodes and red light emitting diodes at appropriate intervals,
The white light emitting diode has a first chromaticity point x = 0.330, y = 0.318, a second chromaticity point x = 0.330, y = 0.360, a third chromaticity point x = 0. 356, y = 0.351, the fourth chromaticity point x = 0.361, y = 0.385, and the red light emitting diode has the first chromaticity point x = 0.659, y = 0.321, second chromaticity point x = 0.680, y = 0.320, third chromaticity point x = 0.685, y = 0.295, fourth chromaticity point x = 0 .708, y = 0.292.
The frequency of illumination light is in the range of 0.5 to 2.0 Hz, and the duty ratio of the waveform of illumination light is in the range of 0.4: 0.6 to 0.7: 0.3. By changing the luminous flux of the light emitting diode at a predetermined luminous flux ratio in the first half and the second half of the waveform, and turning on the red light emitting diode in the first half or the second half of the waveform, a warning can be issued to a vehicle driver or the like passing through,
The luminous flux ratio between the white light emitting diode and the red light emitting diode in the first half or the second half of the waveform is 1.0: 0, and the luminous flux ratio between the white light emitting diode and the red light emitting diode in the second half or the first half of the waveform is 0.5: 0.5 to 0. .7: Tunnel illumination method characterized by being in a range of 0.3 .