JP2010080125A - Outdoor luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outdoor luminaire wherein replacing times for two types of LEDs can be matched to each other. <P>SOLUTION: The outdoor luminaire 1 includes a white LED 110, a blue LED 120, and a driving part 200. The white LED 110 includes a first LED chip 111 for emitting blue light, a phosphor 112 for changing the light emitted by the fist LED chip 111 into light having a second wavelength, and a first reflecting member 113 for reflecting the light whose wavelength is changed by the phosphor 112. The blue LED 120 includes a second LED chip 121 for emitting blue light, a filler 122 for changing the light emitted by the second LED chip 121 into light having a third wavelength shorter than the second wavelength, and a second reflecting member 123 for reflecting the light whose wavelength is changed by the filler 112. The driving part 200 drives the white LED 110 and the blue LED 120 so that a time for driving the blue LED 120 is shorter than a time for driving the while LED 110. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an outdoor lighting fixture.

2. Description of the Related Art Conventionally, there are outdoor lighting fixtures that simultaneously emit light of a plurality of colors. For example, Japanese Unexamined Patent Application Publication No. 2008-135381 (Patent Document 1) describes an outdoor lighting fixture including a white LED and a blue LED. In this outdoor lighting fixture, the vertical lower position of the lamp is lit in white so as not to hinder the smooth passage of pedestrians and traveling vehicles passing under the lamp body, and the lamp body and / or the vicinity thereof are illuminated at night. It emits blue light with good visibility.
JP 2008-135381 A

  In the LED, when the reflecting member, the phosphor, the other resin member, or the like is damaged, the light transmittance is lowered. When the light transmittance decreases, it becomes impossible to obtain the brightness necessary for an outdoor lighting fixture, and the LED must be replaced. The degree of damage to the reflective member, phosphor, and other resin members of the LED varies depending on the wavelength of light emitted by the LED. Since the energy density of light with a short wavelength is greater than the energy density of light with a long wavelength, an LED that emits light with a shorter wavelength is more susceptible to damage.

  When two types of LEDs, for example, a white LED and a blue LED, are used as the light source, as in the outdoor lighting fixture described in JP 2008-135381 A (Patent Document 1), the white LED and the blue LED are Since the wavelength of the emitted light is different, the degree of damage is different even if the light is lit for the same time. For this reason, the replacement time of the white LED and the blue LED is shifted, and the number of replacements is doubled as compared with the case where only one type of LED is provided. If the number of LED replacements increases, it takes time and costs for replacement.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an outdoor lighting apparatus that can arrange the replacement timing of two types of LEDs that emit light of different colors.

  The outdoor lighting fixture according to the present invention includes a first LED, a second LED, and a drive unit that drives the first LED and the second LED. The first LED includes a first LED chip that emits light having a first wavelength, and a first wavelength changing member that changes light having the first wavelength emitted by the first LED chip to light having a second wavelength. And a first reflecting member for reflecting the light whose wavelength has been changed by the first wavelength changing member. The second LED changes the second LED chip that emits light of the first wavelength and the light of the first wavelength that is emitted from the second LED chip to light of the third wavelength that is shorter than the second wavelength. And a second reflection member for reflecting the light whose wavelength has been changed by the second wavelength change member. The drive unit drives the first LED and the second LED so that the time during which the second LED is driven is shorter than the time during which the first LED is driven.

  Both the first LED chip of the first LED and the second LED chip of the second LED emit light of the first wavelength. The light having the first wavelength emitted by the first LED chip is changed to light having the second wavelength by the first wavelength changing member and reflected by the first reflecting member. On the other hand, the second wavelength light emitted from the second LED chip is changed to the third wavelength light by the second wavelength changing member and reflected by the second reflecting member.

  The first reflecting member is irradiated with light having the second wavelength. The light of the second wavelength hits the first wavelength changing member constituting the first LED, for example, a resin member that forms the surface of the LED, or passes through these members. On the other hand, the second reflecting member is irradiated with light of the third wavelength. The light of the third wavelength hits or passes through the second wavelength changing member constituting the second LED, for example, a resin member forming the surface of the LED, or the like.

  The third wavelength is shorter than the second wavelength. Light having a short wavelength has a higher energy density than light having a long wavelength. Therefore, the second reflecting member, the second wavelength changing member, and other members of the second LED that are irradiated or transmitted with the light of the third wavelength are irradiated or transmitted with the light of the second wavelength. Compared to the first reflecting member, the first wavelength changing member, and other members of the first LED to be damaged, it is easily damaged.

  Therefore, the drive unit drives the first LED and the second LED so that the time during which the second LED is driven is shorter than the time during which the first LED is driven.

  Damage to the first LED and the second LED by shortening the time during which the second LED, which is relatively susceptible to damage, is driven rather than the time during which the first LED, which is relatively less damaged, is driven. The difference in the degree can be reduced. Since the difference in the degree of damage between the first LED and the second LED is small, the first LED and the second LED can be replaced almost simultaneously.

  By doing in this way, the outdoor lighting fixture which can arrange the replacement | exchange time of two types of LED which emits light of a different color can be provided.

  In the outdoor lighting fixture according to the present invention, the drive unit drives the first LED by causing a pulse current having a first pulse width to flow through the first LED at the first frequency, and the second LED. In addition, it is preferable to drive the second LED by causing a pulse current having a first pulse width to flow at a second frequency smaller than the first frequency.

  Moreover, in the outdoor lighting fixture according to the present invention, the drive unit drives the first LED by causing a pulse current having a first pulse width to flow through the first LED at the first frequency, and the second LED. It is preferable to drive the second LED by causing a pulse current having a second pulse width shorter than the first pulse width to flow through the LED at the first frequency.

  Moreover, in the outdoor lighting fixture according to the present invention, the drive unit drives the first LED by continuously flowing a current to the first LED, and flows a pulse current to the second LED. It is preferable to drive the second LED.

  By doing in this way, the time for which the second LED emits light can be easily made shorter than the time for which the first LED emits light, for example, using an inverter or the like.

  In the outdoor lighting fixture according to the present invention, the driving unit drives the first LED by flowing a current having a first peak value to the first LED, and the first peak value to the second LED. It is preferable to drive the second LED by flowing a current having a second peak value larger than the second LED.

  The time during which the second LED emits light is shorter than the time during which the first LED emits light. Therefore, the visibility of the light emitted from the second LED may be lower than the visibility of the light emitted from the first LED. Therefore, the second peak value of the current flowing through the second LED is set to be larger than the first peak value of the current flowing through the first LED. By doing in this way, the light which 2nd LED emits can be made stronger than the light which 1st LED emits, and the visibility of the light which 2nd LED emits can be improved.

  In the outdoor lighting fixture according to the present invention, the first LED is a white LED, the second LED is a blue LED, and the white LED is disposed so as to emit light relatively downward, The blue LED is preferably arranged so as to emit light relatively upward.

  In this way, even if the light emitted from the blue LED driven by the pulse current is more flickering than the light emitted from the white LED, the blue flickering is on the road directly under the outdoor lighting fixture. Can be made inconspicuous. Moreover, since the blue light with good visibility can be seen from a place away from the outdoor lighting fixture, a crime prevention effect and the like can be expected.

  As described above, according to the present invention, it is possible to provide an outdoor lighting apparatus capable of aligning the replacement timings of two types of LEDs that emit different illumination lights. Since the replacement time of two types of LEDs can be aligned, the number of LED replacements can be reduced compared to conventional outdoor lighting fixtures. In this way, it is possible to reduce labor and cost required for replacing the LED in the outdoor lighting fixture.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a diagram showing an entire outdoor lighting fixture as a first embodiment of the present invention.

  As shown in FIG. 1, the outdoor lighting fixture 1 mainly includes a column 400, a lamp 100 that is attached to the column 400 so as to protrude from the column 400, a solar panel 310 that is mounted on the top of the column 400, and a column. The drive part 200 arrange | positioned inside 400 and the storage battery 320 are provided. The support 400 is erected on the ground 500, and the lamp 100 is held at a predetermined height from the ground 500.

  The solar panel 310 is connected to the storage battery 320, and charges the storage battery 320 using sunlight. The outdoor lighting fixture 1 is installed outdoors and illuminates the surroundings mainly at night. Thus, by providing the outdoor lighting fixture 1 with the solar panel 310 and the storage battery 320 in this way, the storage lighting device 320 is charged in the daytime when the outdoor lighting fixture 1 does not need to illuminate the surroundings. The outdoor lighting fixture 1 can be driven by the charged storage battery 320.

  FIG. 2 is an arrow view schematically showing a state when the lamp is viewed from the direction of arrow II shown in FIG.

  As shown in FIG. 2, the lamp 100 includes an upper surface plate 101, a translucent plate 102 disposed on the lower surface side of the upper surface plate 101, and a first disposed between the upper surface plate 101 and the translucent plate 102. It has a support plate 103, a second support plate 104, a plurality of white LEDs 110 arranged on the first support plate 103, and a plurality of blue LEDs 120 arranged on the second support plate 104. The white LED 110 is an example of a first LED, and the blue LED 120 is an example of a second LED. An LED (light emitting diode) is an example of a light emitting device.

  The first support plate 103 is formed in a plate shape and is disposed substantially horizontally. The plurality of white LEDs 110 are arranged on the lower surface of the plate-like first support plate 103 so as to irradiate light substantially vertically downward.

  The second support plate 104 is formed in a plate shape, and is disposed at a predetermined angle with respect to the horizontal plane between the upper surface of the first support plate 103 and the upper surface plate 101. The plurality of blue LEDs 120 are arranged to irradiate a direction inclined at a predetermined angle from the vertically downward direction.

  The plate-like first support plate 103 is disposed directly below the plurality of blue LEDs 120. Therefore, a part of the light emitted from the blue LED 120 is blocked by the first support plate 103 and is difficult to irradiate downward. Further, a part of the light emitted from the blue LED 120 is reflected by the upper surface of the first support plate 103 and irradiates relatively upward. As described above, the white LED 110 irradiates substantially vertically below the lamp 100, and the blue LED 120 irradiates the outside of the range irradiated by the white LED 110. A range indicated by A on the ground surface 500 in FIG. On the other hand, the range indicated by B in FIG. 2 is irradiated by both the blue LED 120 and the white LED 110. In FIG. 2, the distance between the ground 500 and the lamp 100 is shortened.

  The lower surface of the upper surface plate 101, the first support plate 103, the white LED 110, the second support plate 104, and the blue LED 120 are covered with a translucent plate 102.

  FIG. 3: is sectional drawing (A) which shows typically the inside of white LED arrange | positioned at a lamp, and sectional drawing (B) which shows typically the inside of blue LED.

  As shown in FIG. 3A, the white LED 110 includes a first LED chip 111, a first reflecting member 113 disposed so as to surround a side surface of the first LED chip 111, and a first LED. The first wavelength changing member filled in the periphery of the chip 111 is composed of a phosphor 112, a first LED chip 111, a first reflecting member 113, and a resin body 114 that covers the entire phosphor 112. . In this embodiment, the first LED chip 111 emits blue light as light having the first wavelength, and the phosphor 112 is a yellow phosphor 112. In addition, the phosphor 112 may be filled around the first LED chip 111, or may be applied to a position where light emitted from the first LED chip 111 is transmitted inside the resin body 114. The resin body 114 is made of a transparent material that hardly changes the wavelength of light.

  The blue light emitted from the first LED chip 111 is gradually changed to light of the second wavelength having a longer wavelength while passing through the phosphor 112. The light whose wavelength is changed by the phosphor 112 passes through the resin body 114 and is irradiated to the outside of the white LED 110. A part of the light whose wavelength is changed by the phosphor 112 is reflected by the first reflecting member 113 and then irradiated to the outside of the white LED 110 through the resin body 114. Further, a part of the light whose wavelength is changed by the phosphor 112 is not reflected by the first reflecting member 113 but is directly irradiated to the outside of the white LED 110 through the resin body 114, or the phosphor 112 and the resin. After being reflected at the interface with the body 114, the light is reflected by the first reflecting member 113 and then irradiated to the outside of the white LED 110 through the resin body 114. The light emitted to the outside of the white LED 110 is white light.

  As shown in FIG. 3B, the blue LED 120 includes a second LED chip 121, a second reflecting member 123 disposed so as to surround a side surface of the second LED chip 121, and a second LED. As a second wavelength changing member filled around the chip 121, it is composed of a filler 122, a second LED chip 121, a second reflecting member 123, and a resin body 124 that covers the entire filler 122. . In this embodiment, the second LED chip 121 is the same type of LED chip as the first LED chip 111, and emits blue light as light of the first wavelength. The resin body 124 is made of a transparent material that hardly changes the wavelength of light.

  In this embodiment, the blue light emitted from the second LED chip 121 passes through the filler 122 and is changed to light of the third wavelength having a relatively long wavelength. Shall not be changed. The light whose wavelength has been changed by the filler 122 passes through the resin body 124 and is irradiated outside the blue LED 120 as blue light. A part of the light whose wavelength is changed by the filler 122 is reflected by the second reflecting member 123 and then irradiated to the outside of the blue LED 120 through the resin body 124. Further, a part of the light whose wavelength is changed by the filler 122 is not reflected by the second reflecting member 123 but is directly irradiated to the outside of the blue LED 120 through the resin body 124, or the filler 122 and the resin. After being reflected at the boundary surface with the body 124, the light is reflected by the second reflecting member 123 and then irradiated to the outside of the blue LED 120 through the resin body 124. The light irradiated to the outside of the blue LED 120 is blue light.

  Both the first LED chip 111 and the second LED chip 121 emit the same blue light. Even if the light emitted from the second LED chip 121 passes through the filler 122, the wavelength is not significantly changed. On the other hand, the light emitted from the first LED chip 111 is changed to light having a long wavelength by passing through the yellow phosphor 112. In this way, the light emitted from the second LED chip 121 and passing through the filler 122 has a shorter wavelength than the light emitted from the first LED chip 111 and passed through the phosphor 112.

  FIG. 4 is a block diagram showing a control-related configuration of the outdoor lighting fixture according to the first embodiment of the present invention.

  As shown in FIG. 4, the outdoor lighting fixture 1 has a drive-related unit 200, a white LED circuit 213, and a blue LED circuit 223 supplied with power from a storage battery 320 connected to the solar panel 310 as a control-related configuration. With. The drive unit 200 includes a controller 201, a DCDC converter 211, an inverter 212, a DCDC converter 221, and an inverter 222. The white LED circuit 213 is connected to the white LED 110 (FIG. 2) and supplies power to the white LED 110. The blue LED circuit 223 is connected to the blue LED 120 (FIG. 2) and supplies power to the blue LED 120.

  The voltage of the storage battery 320 is changed by the DCDC converter 211 and the DCDC converter 221 and supplied to the inverter 212 and the inverter 222. The controller 201 transmits a control signal to the DCDC converter 211 and the DCDC converter 221 to control the magnitude of the supply voltage to the inverter 212 and the inverter 222. The controller 201 also transmits a control signal to the inverter 212 to adjust the frequency, on-pulse width, peak value, etc. of the current passed through the white LED circuit 213, and transmits the control signal to the inverter 222 to transmit the blue LED circuit 223. Adjust the frequency, on-pulse width, peak value, etc. In this manner, the current frequency, on-pulse width, peak value, and the like for driving the white LED 110 and the blue LED 120 are adjusted.

  As an example of driving the white LED 110 and the blue LED 120 by the driving unit 200, it is preferable to perform any one of the following (1) to (3).

  (1) The driving unit 200 drives the white LED 110 by causing a pulse current having a first pulse width to flow through the white LED 110 at a first frequency, and applies a pulse current having a first pulse width to the blue LED 120. The blue LED 120 is driven by flowing at a second frequency lower than the frequency. For example, the driving unit 200 drives the white LED 110 by flowing a pulse current having a pulse width of 5 msec to the white LED 110 at a frequency of 100 Hz, and flows a pulse current having a pulse width of 5 msec to the blue LED 120 at 60 Hz, which is smaller than 100 Hz. As a result, the blue LED 120 is driven.

  (2) The drive unit 200 drives the white LED 110 by flowing a pulse current having a first pulse width to the white LED 110 at a first frequency, and the second LED 200 has a second width shorter than the first pulse width. The blue LED 120 is driven by flowing a pulse current having a pulse width at the first frequency. For example, the driving unit 200 drives the white LED 110 by flowing a pulse current having a pulse width of 5 msec through the white LED 110 at a frequency of 100 Hz, and applies a pulse current having a pulse width of 3 msec shorter than 5 msec to the blue LED 120 at 100 Hz. The blue LED 120 is driven by flowing at a frequency.

  (3) The driving unit 200 drives the white LED 110 by continuously supplying a current to the white LED 110, and drives the blue LED 120 by supplying a pulse current to the blue LED 120.

  By doing as (1)-(3), the time for which the blue LED 120 emits light can be easily made shorter than the time for which the white LED 110 emits light using the inverter and the inverters 212 and 222.

  In addition, the driving unit 200 drives the white LED 110 by flowing a current having a first peak value through the white LED 110, and blue by flowing a current having a second peak value larger than the first peak value through the blue LED 120. The LED 120 is driven. For example, the driving unit 200 drives the white LED 110 by passing a current of 10 mA through the white LED 110, and drives the blue LED 120 by passing a current of 20 mA larger than 10 mA through the blue LED 120.

  By driving the white LED 110 and the blue LED 120 as described above in (1) to (3), the time for the blue LED 120 to emit light is shorter than the time for the white LED 110 to emit light. Therefore, the visibility of the light emitted from the blue LED 120 may be lower than the visibility of the light emitted from the white LED 110. Therefore, the second peak value of the current flowing through the blue LED 120 is set to be larger than the first peak value of the current flowing through the white LED 110. By doing in this way, the light which blue LED120 emits can be made stronger than the light which white LED110 emits, and the visibility of the light which blue LED120 emits can be improved.

  As described above, the outdoor lighting fixture 1 includes the white LED 110, the blue LED 120, and the drive unit 200 that drives the white LED 110 and the blue LED 120. The white LED 110 emits blue light. 111, a phosphor 112 that changes the blue light emitted from the first LED chip 111 to light of the second wavelength, and a first reflecting member 113 that reflects the light whose wavelength has been changed by the phosphor 112. The blue LED 120 includes a second LED chip 121 that emits blue light, and a filling that changes the blue light emitted by the second LED chip 121 into light having a third wavelength shorter than the second wavelength. And the second reflecting member 123 for reflecting the light whose wavelength has been changed by the filler 122, and the driving unit 200 drives the white LED 110. Driving the white LED110 and blue LED120 to shorten the time for blue LED120 is driven than during.

  Both the first LED chip 111 of the white LED 110 and the second LED chip 121 of the blue LED 120 emit blue light. The blue light emitted from the first LED chip 111 is changed to light having the second wavelength by the phosphor 112 and reflected by the first reflecting member 113. On the other hand, the second wavelength light emitted from the second LED chip 121 is changed to the third wavelength light by the filler 122 and reflected by the second reflecting member 123.

  The first reflecting member 113 is irradiated with light having the second wavelength. The light of the second wavelength hits the phosphor 112 constituting the white LED 110, the resin body 114 that forms the surface of the white LED 110, or the like, or passes through these members. On the other hand, the second reflecting member 123 is irradiated with light of the third wavelength. Blue light having a relatively long wavelength hits the filler 122 constituting the blue LED 120, for example, the resin body 124 forming the surface of the blue LED 120, or passes through these members.

  The third wavelength is shorter than the second wavelength. Light having a short wavelength has a higher energy density than light having a long wavelength. Therefore, the second reflective member 123, the filler 122, and other members of the blue LED 120 that are irradiated and transmitted with the light of the third wavelength are white that is irradiated and transmitted with the light of the second wavelength. Compared to the first reflecting member 113, the phosphor 112, and other members of the LED 110, the LED 110 is easily damaged.

  Therefore, the driving unit 200 drives the white LED 110 and the blue LED 120 so that the time during which the blue LED 120 is driven is shorter than the time during which the white LED 110 is driven.

  The difference in the degree of damage between the white LED 110 and the blue LED 120 is reduced by shortening the time during which the relatively easily damaged blue LED 120 is driven rather than the time during which the relatively less damaged white LED 110 is driven. Can do. Since the difference in the degree of damage between the white LED 110 and the blue LED 120 is small, the white LED 110 and the blue LED 120 can be replaced almost simultaneously.

  By doing in this way, the outdoor lighting fixture 1 which can arrange the replacement | exchange time of two types of LED which emits light of a different color can be provided. Since the replacement time of two types of LEDs can be aligned, the number of LED replacements can be reduced compared to conventional outdoor lighting fixtures. In this way, it is possible to reduce labor and cost required for replacing the LED in the outdoor lighting fixture.

  Moreover, in the outdoor lighting fixture 1, white LED110 is arrange | positioned so that light may be irradiated relatively downward, and blue LED120 is arrange | positioned so that light may be irradiated relatively upwards.

  By doing in this way, even if the light emitted from the blue LED 120 driven by the pulse current is flickering than the light emitted from the white LED 110, the blue light is emitted on the road directly below the outdoor lighting fixture 1. Flicker can be made inconspicuous. Moreover, since the blue light with good visibility is seen from a place away from the outdoor lighting fixture 1, a crime prevention effect and the like can be expected.

(Second Embodiment)
The overall main configuration of the outdoor lighting fixture of the second embodiment of the present invention is the same as that of the outdoor lighting fixture 1 of the first embodiment shown in FIG. The outdoor lighting fixture of 2nd Embodiment differs from the outdoor lighting fixture 1 of 1st Embodiment in the form of a lamp.

  FIG. 5 is an arrow view schematically showing a state when the lamp is viewed from the direction of arrow II shown in FIG. 1 as the second embodiment of the present invention.

  As shown in FIG. 5, the lamp 600 according to the second embodiment is disposed between the upper surface plate 601, the translucent plate 602 disposed on the lower surface side of the upper surface plate 601, and the upper surface plate 601 and the translucent plate 602. A support member 603, a plurality of white LEDs 110 and a plurality of blue LEDs 120 arranged on the support member 603, and a light shielding plate 604 arranged between the white LEDs 110 and the blue LEDs 120. The white LED 110 is an example of a first LED, and the blue LED 120 is an example of a second LED. The lower surface of the upper surface plate 601, the support member 603, the white LED 110, the light shielding plate 604, and the blue LED 120 are covered with a light transmitting plate 602.

  The plurality of white LEDs 110 are disposed below the support member 603 so as to irradiate obliquely downward. The plurality of blue LEDs 120 are arranged above the support member 603 so as to irradiate obliquely downward. A light shielding plate 604 is disposed between the plurality of white LEDs 110 and the plurality of blue LEDs 120.

  Since the light shielding plate 604 is disposed above the white LED 110, the light emitted from the white LED 110 is blocked by the light shielding plate 604 and is not easily emitted upward. On the other hand, since the light shielding plate 604 is disposed below the blue LED 120, the light emitted from the blue LED 120 is blocked by the light shielding plate 604 and is not easily irradiated downward.

  In this way, the white LED 110 irradiates substantially vertically below the lamp 600, and the blue LED 120 irradiates outside the range irradiated by the white LED 110.

  Other configurations and effects of the outdoor lighting fixture of the second embodiment are the same as those of the outdoor lighting fixture of the first embodiment.

  The embodiment disclosed above should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above embodiments but by the scope of claims, and includes all modifications and variations within the meaning and scope equivalent to the scope of claims.

BRIEF DESCRIPTION OF THE DRAWINGS As 1st Embodiment of this invention, it is a figure which shows the whole outdoor lighting fixture. It is an arrow view which shows typically a state when a lamp is seen from the direction of arrow II shown in FIG. They are sectional drawing (A) which shows typically the inside of white LED arrange | positioned at a lamp, and sectional drawing (B) which shows typically the inside of blue LED. It is a block diagram which shows the control relevant structure of the outdoor lighting fixture which concerns on 1st Embodiment of this invention. As a second embodiment of the present invention, it is an arrow view schematically showing a state when the lamp is viewed from the direction of arrow II shown in FIG.

Explanation of symbols

  1: outdoor lighting fixture, 110: white LED, 111: first LED chip, 112: phosphor, 113: first reflecting member, 120: blue LED, 121: second LED chip, 122: filler , 123: second reflecting member, 200: driving unit.

Claims (6)

A first LED;
A second LED;
A drive unit for driving the first LED and the second LED;
The first LED has a first LED chip that emits light having a first wavelength, and a first wavelength that changes light having a first wavelength emitted by the first LED chip to light having a second wavelength. A change member, and a first reflection member for reflecting the light whose wavelength has been changed by the first wavelength change member,
The second LED has a second LED chip that emits light of a first wavelength, and a light of a first wavelength that is emitted from the second LED chip, and has a third wavelength that is shorter than the second wavelength. A second wavelength changing member for changing to light, and a second reflecting member for reflecting the light whose wavelength has been changed by the second wavelength changing member,
The drive unit drives the first LED and the second LED so that the time during which the second LED is driven is shorter than the time during which the first LED is driven. lighting equipment. The drive unit is
Driving the first LED by passing a pulse current of a first pulse width to the first LED at a first frequency;
2. The outdoor use according to claim 1, wherein the second LED is driven by causing a pulse current having the first pulse width to flow through the second LED at a second frequency smaller than the first frequency. lighting equipment. The drive unit is
Driving the first LED by passing a pulse current of a first pulse width to the first LED at a first frequency;
2. The second LED is driven by causing a pulse current having a second pulse width shorter than the first pulse width to flow through the second LED at the first frequency. Outdoor lighting fixture. The drive unit is
Driving the first LED by continuously passing a current through the first LED;
The outdoor lighting fixture according to claim 1, wherein the second LED is driven by passing a pulse current through the second LED. The drive unit is
Driving the first LED by passing a first peak current through the first LED;
5. The second LED is driven by flowing a current having a second peak value larger than the first peak value to the second LED. 6. Outdoor lighting fixtures. The first LED is a white LED, and the second LED is a blue LED;
The white LED is arranged to irradiate light relatively downward,
The said blue LED is an outdoor lighting fixture of any one of Claim 1-5 arrange | positioned so that light may be irradiated relatively upwards.

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