JP5903594B2 - LED lighting fixtures - Google Patents

Description

  The present invention relates to an LED lighting apparatus applied to a security light or the like using an LED as a light source.

  2. Description of the Related Art Conventionally, LED lighting apparatuses are known that irradiate sidewalks with light having a spectral characteristic rich in blue and green light, and irradiate light with spectral characteristics rich in green and red light on a roadway (for example, Patent Document 1). reference).

Japanese Patent Laying-Open No. 2008-91232 (FIG. 1, claim 1)

In general, an LED lighting apparatus using a fluorescent lamp, an LED, or the like is designed to increase photopic brightness in a bright environment (photopic vision).
This is to make the cone for perceiving brightness work in photopic vision. By increasing the photopic brightness, a person can perceive brighter.

However, in a so-called mesopic environment such as a night street space or a road space, in addition to a cone whose spectral luminous efficiency peak value is 555 nm, there is a housing whose spectral luminous efficiency peak value is around 507 nm. Even if only the photopic brightness is increased to work, the effect is low.
Therefore, Patent Document 1 is provided with a plurality of light sources that are effective in each of the cone and the rod in consideration of the fact that both the cone and the rod existing in the human retina work in thin vision. .

The peak value is between 450 to 550 nm so that at least one of the light sources is in a wavelength region including around 507 nm, which is the peak wavelength of the spectral luminous efficiency of the housing (peak wavelength of dark place visual sensitivity). It becomes the composition which becomes.
Therefore, Patent Document 1 irradiates the sidewalk with light with spectral characteristics rich in blue and green light, and irradiates the road with light with spectral characteristics rich in green and red light. It is easy to visually recognize pedestrians.

As described above, Patent Document 1 aims at improving visibility in thin vision by including a light source having a peak value between 450 and 550 nm.
However, Patent Document 1 using such a Purkinje phenomenon creates a cold atmosphere because the color temperature of light in the entire irradiation range is low.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide an LED lighting apparatus that can prevent the entire irradiation range from becoming a cold atmosphere.

An LED lighting apparatus according to the present invention includes an apparatus main body disposed above an irradiated surface and a light source provided in the apparatus main body, and illuminates the irradiated surface by irradiating light downward from the light source. LED lighting fixtures, wherein the light source is a first LED that irradiates light in a first range including directly under the fixture body on the irradiated surface, and both sides of the first LED in the longitudinal direction of the fixture body. And a second LED that irradiates a second range around the first range, and the second LED includes a peak wavelength in a range of 507 to 555 nm, and the color temperature of the second LED is 8000 to 5,000. a 12000K range, the first 1LED color temperature, 4000～5500K der is, the first 1LED said first range which is an irradiation range of the red and yellow-rich light is irradiated , And the second range which is an irradiation range of the first 2LED are area by der the blue and green rich light is irradiated.

In the LED lighting apparatus according to the present invention, the first LED is mounted on a first substrate, the second LED is mounted on a second substrate, and the first substrate and the second substrate are attached to the same structural member.

  According to the LED lighting apparatus of the present invention, there is an effect that the entire irradiation range can be prevented from becoming a cold atmosphere.

The vertical sectional view of the LED lighting fixture of a 1st embodiment concerning the present invention. The vertical sectional view of the LED lighting fixture of a 2nd embodiment concerning the present invention

Hereinafter, LED lighting fixtures according to a plurality of embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIG. 1, the LED lighting apparatus 10 according to the first embodiment of the present invention is applied to an outdoor crime prevention lamp, and includes an apparatus main body 11 and a fixing member 12 attached to the apparatus main body 11.
The LED lighting apparatus 10 includes a first LED unit 13 attached to the fixing member 12, a pair of second LED units 14, and a lens 15.
The LED lighting fixture 10 may be installed on a ceiling surface of a hall or the like instead of an outdoor crime prevention light.

The instrument main body 11 is waterproofed, and the base is fixed to the upper end of a column 16 embedded in the ground. The appliance main body 11 houses a power supply unit (not shown). The power supply unit is electrically connected to an external power supply circuit.
The fixing member 12 is formed in a flat plate shape and is accommodated in the instrument body 11.

The single fixing member 12 has a first LED unit 13 attached to the center portion of the lower surface thereof, and a pair of second LED units 14 attached to both side portions of the lower surface thereof.
Three LED boards 17 are attached to the fixing member 12.
In the first LED unit 13, the first LED 18 is mounted on the central LED substrate 17.

The second LED unit 14 on the left side in FIG. 1 has the second LED 19 mounted on the LED board 17 on the left side in FIG.
The second LED unit 14 on the right side in FIG. 1 has the second LED 19 mounted on the LED board 17 on the right side in FIG.
Accordingly, since the first LED unit 13 and the pair of second LED units 14 are attached to the single fixing member 12 in a lump, workability at the time of attachment can be improved.

The lens 15 is a resin member colored, for example, milky white, and is attached to the lower side of the fixing member 12 so as to cover the first LED unit 13 and the pair of second LED units 14.
An incident surface 20 and an exit surface 21 corresponding to the first LED unit 13 are formed on the lens 15.

The lens 15 includes an entrance surface 22 and an exit surface 23 corresponding to the second LED unit 14 on the left side in FIG. 1, and an entrance surface 24 and an exit surface corresponding to the second LED unit 14 on the right side in FIG. 25 are integrally formed on the entrance surface 20 and the exit surface 21 at the center.
The lens 15 controls the light distribution of the first LED 18 of the first LED unit 13 and the second LED 19 of the pair of second LED units 14.
The light distribution of the first LED 18 of the first LED unit 13 and the second LED 19 of the pair of second LED units 14 can also be controlled by changing the mounting position of the fixing member 12.

The LED lighting apparatus 10 applies the Purkinje phenomenon.
Normally, humans perceive color by retinal photoreceptor cells. Specifically, this occurs because the cells working in the retina change from cones to rods as dark adaptation progresses.
For this reason, in a bright environment, it is known that illumination with light having a relatively low color temperature is more visible than illumination with light having a relatively high color temperature. Yes.

In a dark environment, it is known that illumination with light with a relatively high color temperature is more visible than illumination with light with a relatively low color temperature. Yes.
These are due to Purkinje's phenomenon. In a bright environment, light with a relatively low color temperature appears bright and light with a relatively high color temperature appears dark.
In an environment where the surroundings are dark, light with a relatively low color temperature appears dark and light with a relatively high color temperature appears bright due to Purkinje's phenomenon.

That is, the 1st LED18 of the 1st LED unit 13 which irradiates near immediately below has a color temperature of 4000-5500K, and has a wavelength higher than 507 nm.
And the 2nd LED19 of the 2nd LED unit 14 which irradiates an outer peripheral side rather than just under has a color temperature of 8000-12000K so that the effect of Purkinje phenomenon may be acquired, and includes a peak wavelength in 507-555 nm.

In such an LED lighting apparatus 10, when power is supplied from an external power supply circuit to the power supply unit, a current flows through a printed circuit (not shown) on the LED substrate 17, and the first LED 18 and the second LED 19 emit light.
At this time, since the first LED 18 in the central portion has a color temperature of 4000 to 5500 K and a wavelength higher than the peak wavelength of the second LED 19, light rich in red and yellow is present in the range θ1 directly below the central portion. Irradiated.

At the same time, since the second LEDs 19 on both sides have a color temperature of 8000 to 12000 K and include a peak wavelength at 507 to 555 nm, light that is rich in blue and green is in the dark side range θ2 on the outer peripheral side rather than just below. Each is irradiated.
Therefore, the LED lighting apparatus 10 does not have a cold atmosphere in the entire irradiation ranges θ1 and θ2 using the Purkinje phenomenon.

As described above, according to the LED lighting apparatus 10 of the first embodiment, the second LED 19 includes a peak wavelength at 507 to 555 nm, the first LED 18 has a higher wavelength than the second LED 19, and the color temperature is higher than that of the second LED 19. Is low.
Therefore, according to the LED lighting apparatus 10 of the first embodiment, it is possible to prevent a cold atmosphere in the entire irradiation ranges θ1 and θ2.

  Moreover, according to the LED lighting fixture 10 of 1st Embodiment, since the color temperature of 2nd LED19 is 8000-12000K, and the color temperature of 1st LED18 is 4000-5500K, Purkinje can be changed by changing a spectrum suitably. Can adapt to the phenomenon.

  And according to the LED lighting fixture 10 of 1st Embodiment, since the 1st LED unit 13 and a pair of 2nd LED unit 14 are attached to the single fixing member 12 collectively, workability | operativity at the time of attachment is favorable. Can be.

(Second Embodiment)
Next, the LED lighting fixture of 2nd Embodiment which concerns on this invention is demonstrated.
Note that, in the following second embodiment, components that are the same as those in the first embodiment described above or components that are functionally similar are denoted by the same or corresponding reference numerals in the drawings, or the description is simplified. Omitted.

As shown in FIG. 2, the LED lighting device 30 according to the second embodiment of the present invention includes a trapezoidal fixing member 31, and the first LED unit 13 is attached to the bottom bottom surface 32 at the center of the fixing member 31. A pair of second LED units 14 is attached to the inclined side surface 33 of the fixing member 31.
Therefore, the first LED 18 of the first LED unit 13 irradiates the vicinity immediately below, and the second LED 19 of the pair of second LED units 14 irradiates the outer peripheral side of the fixing member 31 from directly below the inclined side 33.
The fixing member 31 may be a plate member bent into a U shape.

  According to the LED lighting apparatus 30 of the second embodiment, the irradiation range can be narrowed or expanded by appropriately changing the inclination angle of the inclined side surface 33 of the fixing member 31 according to the installation location.

  In addition, in the LED lighting fixture of this invention, an instrument main body, an LED board, a support | pillar, etc. are not limited to each embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.

10,30 LED lighting fixture 12,31 Fixing member (structural member)
17 LED board (board)
18 First LED
19 Second LED

Claims (2)

An LED lighting device that includes an instrument body disposed above an illuminated surface, and a light source provided in the instrument body, and illuminates the illuminated surface by irradiating light downward from the light source,
As the light source, the first LED for irradiating light on a first range including the portion directly under the device main body on the irradiated surface, and the first LED on both sides in the longitudinal direction of the device main body, and the first LED A second LED for illuminating a second range around the range, and
The second LED includes a peak wavelength at 507 to 555 nm,
The color temperature of the second LED is 8000 to 12000K.
Wherein said 1LED color temperature, Ri 4000~5500K der,
The first range that is the irradiation range of the first LED is a range in which light rich in red and yellow is irradiated,
Wherein said second range is the irradiation range of the 2LED the range der Ru LED luminaire blue and green rich light is irradiated. In the LED lighting fixture of Claim 1,
The LED lighting device, wherein the first LED is mounted on a first substrate, the second LED is mounted on a second substrate, and the first substrate and the second substrate are attached to the same structural member.

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