JP2005142116A - Tunnel luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tunnel luminaire to allow a driver to drive safely or comfortably. <P>SOLUTION: The luminaire 1 comprises a luminaire body 2 made up of a chassis 3, etc. A substrate 10 is disposed in the chassis 3, and an LED 12 is mounted on the substrate 10. The LED 12 is made up of three types of LEDs, i.e, an LED 12a emitting red light, an LED 12b emitting green light, and an LED 12c emitting blue light. The color temperature of the LED 12 can be changed by turning on/off the LEDs 12a-12c or performing light modulation, etc. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a tunnel lighting device that illuminates a tunnel.

Conventionally, lighting fixtures for illuminating the inside of tunnels such as expressways have been installed. Currently, high-pressure sodium lamps, low-pressure sodium lamps, fluorescent lamps, and the like are used as light sources for such luminaires, but attention is focused on the use of light-emitting diodes as the light source from the viewpoint of life and the like (for example, , See Patent Document 1).
JP 2002-324408 A

  By the way, the driver may feel uncomfortable due to the difference in color temperature between the inside and outside of the tunnel when entering the tunnel, and may feel anxiety and reduce the speed. Since such a decrease in speed can cause an accident or traffic jam, it is desirable to minimize it. Also, the driver may feel uncomfortable due to traffic jams.

  The present invention has been made to solve the above problems. That is, it aims at providing the tunnel lighting fixture which a driver can drive safely or comfortably.

  The tunnel lighting fixture according to claim 1 comprises: a fixture main body having an internal space; a substrate attached to the fixture main body; and a semiconductor light emitting element mounted on the substrate and capable of changing a color temperature. It is characterized by.

  In the present invention, the definitions and technical meanings of terms are as follows unless otherwise specified. The semiconductor light emitting device can change the color temperature. Such a semiconductor light emitting device can be composed of one that can change the color temperature of the semiconductor light emitting device itself, or at least two types that have different color temperatures.

  When the semiconductor light emitting element is composed of at least two types having different color temperatures, the color temperature as a whole can be changed by changing the mixing ratio.

  A tunnel lighting fixture according to a second aspect is the tunnel lighting fixture according to the first aspect, wherein the semiconductor light emitting element is composed of at least two types of semiconductor light emitting elements having different color temperatures.

  Examples of at least two types of semiconductor light emitting devices having different color temperatures include a red semiconductor light emitting device that emits red light, a green semiconductor light emitting device that emits green light, and a blue semiconductor light emitting device that emits blue light. And a light emitting element. In addition to these, a white semiconductor light emitting element that emits white light may be added.

  According to the tunnel lighting fixture of Claim 1 and Claim 2, a driver can drive safely or comfortably.

(First embodiment)
Hereinafter, the first embodiment will be described. FIG. 1 is a schematic plan view of a lighting fixture according to the present embodiment, and FIG. 2 is a schematic vertical sectional view of the lighting fixture according to the present embodiment. FIG. 3 is a schematic diagram showing a state when the lighting fixture according to the present embodiment is attached to the inner wall of the tunnel, and FIG. 4 is a block wiring diagram according to the present embodiment.

  As shown in FIG.1 and FIG.2, the lighting fixture 1 is comprised from the airtight type equipment main bodies 2 grade | etc., Made from stainless steel etc., for example. The instrument body 2 is configured in a sealed form, such as a jet-proof instrument body defined in JIS C8140, for example, and is configured so as not to have a detrimental effect upon receiving a direct jet of water from any direction. .

  The instrument body 2 is composed of a chassis 3 and the like. The chassis 3 is formed with a plurality of mounting ears 3a for fixing the lighting fixture 1 to the inner wall of the tunnel. Each mounting ear 3a is formed with a screw hole. The instrument body 2 is fixed to the tunnel inner wall at an angle of about 45 degrees by screwing to a mounting device such as a stay provided on the tunnel inner wall using the screw holes.

  A lid 5 having a substantially rectangular light projecting opening is attached to a light projecting opening end of the chassis 3 via a packing 4. The lid 5 is attached to the chassis 3 by a hinge 6 so as to be openable and closable, and is held closed by a latch 7 provided on the chassis 3 on the opposite side of the hinge 6. The closing edge of the lid 5 is treated so that moisture and dust do not enter by packing.

  A translucent cover 8 is fitted into the light projection opening of the lid 5 in a watertight and airtight manner. A transparent glass plate is used for the translucent cover 8. The translucent cover 8 is fixed to the lid 5 with an adhesive 9 such as silicone.

  A substrate 10 is disposed in the instrument body 2 so as to be substantially parallel to the translucent cover 8. On the back side of the substrate 8, a lighting circuit 11 including a rectifying circuit that changes an alternating current supplied from an alternating current power source into a pulsating current or a direct current is disposed.

  A light emitting diode 12 (hereinafter referred to as “LED”) is mounted on the substrate 10 on the surface side of the substrate 10. The LED 12 is composed of at least two types of LEDs having different color temperatures. In the present embodiment, the LED 12 is composed of three types of LEDs: an LED 12a that emits red light, an LED 12b that emits green light, and an LED 12c that emits blue light. Here, “red light” means light having an emission peak wavelength in the range of about 605 to 635 nm, and “green light” means light having an emission peak wavelength in the range of about 530 to 570 nm. The “blue light” means light having an emission peak wavelength in the range of about 450 to 490 nm.

  The LED 12 is divided into a plurality of units 12d, and each unit 12d is composed of LEDs 12a to 12c. The units 12d are arranged in the longitudinal direction and the short direction of the substrate. In the present embodiment, there are four rows (first row to fourth row) of units 12d in the longitudinal direction of the substrate. Here, the first to fourth columns have the same light distribution. In each row, the units 12d have different light distributions. In each unit 12d, the LEDs 12a to 12c have the same light distribution.

  A plurality of such lighting fixtures 1 are attached to the inner wall of the tunnel T as shown in FIGS. 3 and 4. Near the entrance of the tunnel T, a color luminance meter 13 capable of measuring the color temperature and brightness near the entrance of the tunnel T is installed. Each luminaire 1 and the color luminance meter 13 are electrically connected to a controller 14 that controls the LED 12 in each luminaire 1 based on the measurement result of the color luminance meter 13. Specifically, based on the measurement result of the color luminance meter 13, the LEDs 12a to 12c are turned on, turned off, dimmed, etc. so that the color temperature of the light emitted from the LED 12 is substantially equal to the color temperature near the entrance of the tunnel T. Then, the color temperature is changed.

  In the present embodiment, the color luminance near the entrance of the tunnel T is measured by the color luminance meter 13, and the color temperature emitted from the LED 12 based on the measurement result is substantially equal to the color temperature near the entrance of the tunnel T. Therefore, when the tunnel T enters the tunnel T, the uncomfortable feeling caused by the difference in color temperature between the tunnel T and the outside of the tunnel T can be reduced. Thereby, anxiety can be reduced and the driver can drive safely.

  In this Embodiment, since LED12 is covered with the translucent cover 8, damage to LED12 can be suppressed. That is, since sand etc. are rolled up in the tunnel T, it is necessary to clean the lighting fixture 1 regularly. Here, when the LED 12 is exposed on the surface of the instrument body 2, the LED 12 may be damaged during cleaning. On the other hand, in this Embodiment, since LED12 is covered with the translucent cover 8, damage to LED12 can be suppressed.

(Example 1)
Example 1 will be described below. In this example, the light flux ratio of each LED was examined when LEDs with different color temperatures were turned on to obtain light with color temperatures of 3000K, 5000K, and 6500K.

  Experimental conditions will be described. In this example, as an LED, a red LED having an emission peak wavelength of about 620 nm and a half width of the emission spectrum of about 16.1 nm, an emission peak wavelength of about 550 nm, and an emission spectrum of A green LED having a half width of about 48.0 nm and a blue LED having an emission peak wavelength of about 470 nm and an emission spectrum having a half width of about 68.8 nm were used. Such LEDs were turned on to produce light having color temperatures of 3000K, 5000K, and 6500K, and the luminous flux ratios of the LEDs at that time were examined.

The experimental results will be described.

  When the LED was lit at a luminous flux ratio as shown in Table 1, light with color temperatures of 3000K, 5000K, and 6500K were obtained. From this result, when the LED 12 is composed of the LED of this embodiment and the LED is controlled by the controller 14 so as to have a luminous flux ratio as shown in Table 1, light having a color temperature of 3000K, 5000K, 6500K is obtained. It was confirmed that

(Example 2)
Example 2 will be described below. In this example, as in the case of the above example, an LED having a different color temperature was turned on, and the luminous flux ratio of each LED when the color temperature was 3000K, 5000K, or 6500K was obtained.

  Experimental conditions will be described. In this example, as an LED, a red LED having an emission peak wavelength of about 620 nm and an emission spectrum half-width of about 24.5 nm, an emission peak wavelength of about 550 nm, and an emission spectrum of A green LED having a half width of about 31.6 nm and a blue LED having an emission peak wavelength of about 470 nm and an emission spectrum having a half width of about 68.8 nm were used. Such LEDs were turned on to produce light having color temperatures of 3000K, 5000K, and 6500K, and the luminous flux ratios of the LEDs at that time were examined.

The experimental results will be described.

  When the LEDs were lit at a luminous flux ratio as shown in Table 2, light with color temperatures of 3000K, 5000K, and 6500K were obtained. From this result, when the LED 12 is composed of the LED of this embodiment and the LED is controlled by the controller 14 so as to have a luminous flux ratio as shown in Table 2, light with a color temperature of 3000K, 5000K, 6500K is obtained. It was confirmed that

(Example 3)
Example 3 will be described below. In this example, as in the case of the above example, an LED having a different color temperature was turned on, and the luminous flux ratio of each LED when the color temperature was 3000K, 5000K, or 6500K was obtained.

  Experimental conditions will be described. In this example, as an LED, a red LED having an emission peak wavelength of about 620 nm and a half-width of the emission spectrum of about 16.1 nm, an emission peak wavelength of about 545 nm, and an emission spectrum of A green LED having a half width of about 48.0 nm and a blue LED having an emission peak wavelength of about 455 nm and an emission spectrum having a half width of about 49.2 nm were used. Such LEDs were turned on to produce light having color temperatures of 3000K, 5000K, and 6500K, and the luminous flux ratios of the LEDs at that time were examined.

The experimental results will be described.

  When the LED was lit at a luminous flux ratio as shown in Table 3, light with color temperatures of 3000K, 5000K, and 6500K was obtained. From this result, when the LED 12 is composed of the LED of this embodiment and the LEDs are respectively controlled to have a light flux ratio as shown in Table 3 by the controller 14, light having a color temperature of 3000K, 5000K, 6500K is obtained. It was confirmed that

(Second Embodiment)
Hereinafter, a second embodiment will be described. In this embodiment, an example in which the color temperature of an LED is controlled according to traffic conditions will be described.

  Near the entrance of the tunnel T, a camera (not shown) is installed for grasping the traffic situation. The camera and the controller 14 are electrically connected, and the controller 14 is configured to control the LED 12 based on the camera image. For example, when there is a traffic jam, the LED 12 is controlled so that light with a low color temperature is emitted. In this case, discomfort due to traffic jam can be reduced, and the driver can drive comfortably.

(Third embodiment)
The third embodiment will be described below. In the present embodiment, an example in which LEDs are controlled according to seasons or time zones will be described.

  A timer (not shown) for measuring time is electrically connected to the controller 14, and the controller 14 is configured to control the LED 12 based on the time measured by the timer. For example, when controlling the LED 12 according to the season, the LED 12 is controlled so that light having a high color temperature is emitted in summer, and the LED 12 is controlled so that light having a low color temperature is emitted in winter. In this case, a refreshing feeling can be given in summer, and a warm feeling can be given in winter. Thereby, a driver can drive comfortably.

  On the other hand, when the LED 12 is controlled according to the time zone, for example, the LED 12 is controlled so that light having a high color temperature is emitted at night and in the morning. In this case, the drowsiness of the driver can be suppressed, and the driver can drive safely.

(Fourth embodiment)
Hereinafter, a fourth embodiment will be described. In this embodiment, an example in which an LED is not covered with a light-transmitting cover will be described. FIG. 5 is a schematic vertical sectional view of the lighting fixture according to the present embodiment.

  As shown in FIG. 5, the board 10 is fitted into the light projecting opening of the lid 5 in a watertight and airtight manner so that the LED 12 is positioned outside the instrument body 2. Thus, in the present embodiment, the LED 12 is not covered by the translucent cover 8 and is exposed. At this time, the periphery of the plurality of LEDs 12 arranged on the substrate 10 is covered with the resin 15 so that the surface is substantially flat.

  As the resin 15, it is preferable to use a black resin so that light emission from the LED 12 is not hindered by refraction or the like. In addition, in order to make the resin 15 emit more light emitted from the LED 12 to the outside of the instrument, a granular diffusion means for diffusing light, and a photocatalyst material may be mixed in the resin 15 so that cleaning can be simplified. Furthermore, the LED 12 may be covered with a reflective layer in order to emit more light from the LED 12 to the outside of the device.

  In the present embodiment, since the LED 12 is not covered by the translucent cover 8, the brightness can be improved. That is, when the LED 12 is covered with the translucent cover 8, the light emitted from the LED 12 passes through the translucent cover 8 and is emitted outside the instrument body 2. Here, when the light emitted from the LED 12 passes through the translucent cover 8, the light is somewhat blocked by the translucent cover 8. On the other hand, in this Embodiment, since LED12 is not covered with the translucent cover 8, light is not interrupted by the translucent cover 8. FIG. Therefore, the brightness can be improved.

  In the present embodiment, since the periphery of the LED 12 is covered with the resin 15, it is possible to suppress attachment of exhaust gas soot between the LEDs 12 and the like. Further, since the surface is flat, there is an advantage that the cleaning is not complicated.

  In this Embodiment, since LED12 is arrange | positioned out of the instrument main body 2, the inside of the instrument main body 2 can be utilized effectively.

(Fifth embodiment)
The fifth embodiment will be described below. In the present embodiment, an example in which LEDs are thinned and lit so that the accumulated lighting time of the LEDs becomes uniform will be described. 6 (a) to 6 (h) and FIGS. 7 (a) to 7 (h) are schematic views showing a state when the lighting fixture according to the present embodiment is turned on.

  A timer (not shown) for measuring time is electrically connected to the controller 14. The controller 14 is configured to control the LEDs 12a to 12c so that the cumulative lighting times of the LEDs 12a to 12c are uniform every predetermined time based on the time measured by the timer. In the present embodiment, the LEDs 12a to 12c are controlled for each row of the units 12d. For example, from 18:00 to 16:00 on the first day, the first to fourth columns are lit as shown in FIG. 6A, and from 16:00 to 21:00 on the first day, FIG. 6B. As shown in Fig. 6 (c), the first and third columns are lit, and the fourth column is lit as shown in Fig. 6 (c) from 21:00 on the first day to 3:00 on the second day. From 3 o'clock to 8 o'clock in the eyes, the first and third columns are lit as shown in FIG. Next, from 8:00 to 16:00 on the second day, the first to fourth columns are turned on as shown in FIG. 6E, and from 16:00 to 21:00 on the second day, FIG. 6 (f). As shown in Fig. 6 (g), the second and fourth columns are turned on, and from the second day of 21:00 to the third day of 3:00, the third row is turned on as shown in Fig. 6 (g). From 3 o'clock to 8 o'clock in the eye, the second and fourth columns are lit as shown in FIG. 6 (h). Subsequently, from 8 o'clock to 16 o'clock on the third day, the first to fourth columns are lit as shown in Fig. 7 (a), and from 16:00 to 21:00 on the third day, Fig. 7 (b). As shown in FIG. 7 (c), the first column and the third column are turned on, and the second column is turned on as shown in FIG. From 3 o'clock to 8 o'clock on the day, the first row and the third row are lit as shown in FIG. Then, from 8 o'clock to 16 o'clock on the fourth day, the first to fourth columns are lit as shown in Fig. 7 (e), and from 16 o'clock to 21 o'clock on the fourth day, Fig. 7 (f). As shown in Fig. 7, the second and fourth columns are turned on, and from 21:00 on the fourth day to 3 o'clock on the fifth day, the first column is turned on as shown in Fig. 7 (g). From 3 o'clock to 8 o'clock in the eyes, the second and fourth columns are lit as shown in FIG. These lightings are repeated.

  In this embodiment, the LEDs 12a to 12c are thinned and lit so that the cumulative lighting time of the LEDs 12a to 12c becomes uniform every predetermined time, so that the maintenance management cost of the tunnel T can be reduced and the LEDs 12a to 12c are replaced. This can reduce the time and effort involved. That is, the maintenance and management cost of the tunnel T can be reduced by performing thinning lighting and turning off the unnecessary LEDs 12a to 12c. In addition, by controlling the lighting of the LEDs 12a to 12c as described above, the cumulative lighting time of the LEDs 12a to 12c becomes substantially uniform every predetermined time, and the LEDs 12a to 12c reach the end of their life almost at the same time. Therefore, the trouble at the time of replacing the LEDs 12a to 12c can be reduced.

  In the present embodiment, the first column to the fourth column have the same light distribution, and the lighting of the LEDs 12a to 12c is controlled for each column of the unit 12d. Can be suppressed. That is, when the LEDs 12a to 12c are turned on and off, the light distribution changes, and a desired light distribution may not be obtained. On the other hand, in the present embodiment, the first column to the fourth column are configured to obtain the same light distribution, and the lighting of the LEDs 12a to 12c is controlled for each column of the unit 12d. Even if the lighting of ˜12c is controlled, the light distribution does not change. Thereby, the change of the light distribution at the time of carrying out thinning-out lighting can be suppressed.

  The present invention is not limited to the description of the above embodiment, and the structure, material, arrangement of each member, and the like can be appropriately changed without departing from the gist of the present invention. In the first embodiment, the color luminance meter 13 is used and the LED 12 is controlled based on the measurement result of the color luminance meter 13. However, a normal luminance meter or illuminance meter is used, and this luminance meter or You may control LED12 based on the measurement result of a luminometer.

FIG. 1 is a schematic plan view of the lighting apparatus according to the first embodiment. FIG. 2 is a schematic vertical sectional view of the luminaire according to the first embodiment. FIG. 3 is a schematic view showing a state when the lighting apparatus according to the first embodiment is attached to the inner wall of the tunnel. FIG. 4 is a block wiring diagram according to the first embodiment. FIG. 5 is a schematic vertical sectional view of a lighting fixture according to the fourth embodiment. Fig.6 (a)-FIG.6 (h) are the schematic diagrams showing a mode when the lighting fixture which concerns on 5th Embodiment was turned on. Fig.7 (a)-FIG.7 (h) are the schematic diagrams showing a mode when the lighting fixture which concerns on 5th Embodiment was made to light.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Lighting fixture, 2 ... Appliance main body, 10 ... Board | substrate, 12, 12a-12c ... LED.

Claims (2)

An instrument body having an internal space;
A substrate attached to the instrument body;
A semiconductor light emitting device mounted on the substrate and capable of changing a color temperature;
A tunnel lighting fixture comprising:   The tunnel light fixture according to claim 1, wherein the semiconductor light emitting element is composed of at least two kinds of semiconductor light emitting elements having different color temperatures.

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