JP2013004451A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture capable of improving uniform emission efficiency and having no possibility of disconnection, as well as radiating heat efficiently.SOLUTION: The lighting fixture 10 is provided with a plurality of first LEDs 20 arranged on the same plane and a plurality of second LEDs 25 which are arranged at positions further recessed than the first LEDs 20 so as to irradiate from the intervals of the first LEDs 20.

Description

  The present invention relates to a lighting fixture applied to a ceiling light or the like attached to a ceiling surface.

2. Description of the Related Art Conventionally, there has been known a lighting fixture in which at least one lighting module that illuminates a subject is housed in a housing and includes a light source and optical means (for example, see Patent Document 1).
Patent document 1 has at least two different types of lighting units in which the lighting module has at least one LED and an optical system that cooperates with the LED.
In Patent Document 1, an LED and an optical system constitute a light source and optical means, respectively, while an illumination unit illuminates a corresponding part of a subject in operation, and the LED supplies a constant light beam during operation.

Japanese Patent No. 40142227 (FIG. 2, claim 1)

Patent Document 1 can use light generated by an LED more efficiently.
In Patent Document 1, since an LED and an optical system that cooperates with the LED are provided in the housing, a direction and a range to be arbitrarily illuminated can be determined in advance.
Patent Document 1 can flexibly adjust light distribution by controlling the light flux of each illumination module or by controlling the light flux of an individual illumination unit of a certain illumination module.

However, Patent Document 1 has the following three problems.
The first problem is that, after performing uniform light distribution, another illumination light can be further applied on the uniform light distribution, but the individual illumination modules are mounted on the same substrate.
For this reason, it is necessary to select a lighting module for uniform light emission and a lighting module for different irradiation from the same substrate, and the area directly under the other irradiation is covered, so that the efficiency of uniform light emission deteriorates. That is.
The second problem is that it is necessary to move and adjust the illumination module as appropriate in order to generate uniform light distribution and spot light. It is to become.
The third problem is that the heat sources cannot be efficiently radiated because the light sources are arranged on the same substrate.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a luminaire that can improve the efficiency of uniform light emission, can be radiated efficiently without fear of disconnection.

  The luminaire according to the present invention includes a plurality of first LEDs arranged on the same plane and a plurality of second LEDs arranged at positions deeper than the first LEDs so as to irradiate from between the first LEDs. Prepare.

  The lighting fixture which concerns on this invention has an opening part in the attachment member for attaching said 1st LED, and said 2nd LED is arrange | positioned in the position corresponding to the said opening part of the said attachment member.

  In the lighting fixture according to the present invention, the mounting member has an uneven cross section, the first LED is disposed on the convex surface of the mounting member, and the second LED is disposed on the concave surface of the mounting member.

  In the lighting fixture according to the present invention, the mounting member is formed of a material having thermal conductivity.

  The lighting fixture which concerns on this invention is provided with the 1st lighting circuit which fully lights up or light-controls said 1st LED, and the 2nd lighting circuit which fully lights up or light-modulates said 2nd LED.

  In the lighting fixture according to the present invention, the first LED and the second LED are of different types.

  According to the lighting fixture concerning this invention, there exists an effect that the efficiency of uniform light emission can be improved, there is no possibility of a disconnection, and it can thermally radiate efficiently.

The disassembled perspective view seen from diagonally upward of the lighting fixture of 1st Embodiment which concerns on this invention The circuit block diagram of the lighting fixture of 1st Embodiment which concerns on this invention The lighting sequence figure of the lighting fixture of 1st Embodiment which concerns on this invention The light distribution characteristic figure at the time of lighting of 1st LED of the lighting fixture of 1st Embodiment which concerns on this invention The light distribution characteristic figure at the time of lighting of 1st LED and 2nd LED of the lighting fixture of 1st Embodiment which concerns on this invention The external perspective view around LED of the lighting fixture of 2nd Embodiment which concerns on this invention The vertical sectional view of the lighting fixture of a 2nd embodiment concerning the present invention. The vertical sectional view around LED of the lighting fixture of 3rd Embodiment concerning this invention

Hereinafter, the lighting fixture of several embodiment which concerns on this invention is demonstrated with reference to drawings.
(First embodiment)
As shown in FIG. 1, the lighting fixture 10 of 1st Embodiment which concerns on this invention is equipped with the fixture main body 11 which consists of the outer frame 12 and the top plate 13, and is applied to a ceiling light.
The lighting fixture 10 includes a first LED unit 14 having a first LED substrate 15 attached to the lower surface of the top plate 13.
The lighting fixture 10 includes a second LED unit 16 having a second LED substrate 17 attached to the upper surface of the first LED substrate 15 of the first LED unit 14 and a cover 18 having transparency that is attached to the outer frame 12.

The appliance main body 11 is attached to a central portion of the top surface of the top plate 13 with an attachment adapter 19 that is mechanically and electrically connected to a hook ceiling (not shown) installed on a ceiling surface (not shown).
The first LED board 15 of the first LED unit 14 is an attachment member formed in a square plate shape similar to the top plate 13 of the instrument body 11, and is formed of a material having thermal conductivity, and a plurality of lower surfaces are formed on the lower surface. The first LED 20 is sealed.
The first LED circuit 15 has a first lighting circuit 21 and a second lighting circuit 22 attached to the side edge.
The first LED board 15 is routed together with the first lighting circuit 21 and the second lighting circuit 22 without the wiring being routed from the mounting adapter 19.
The first LED board 15 has a plurality of openings 23 at positions not corresponding to the first LEDs 20.
As for the 1st LED board 15, the lower end part of the supporting member 24 is attached to the four corners. The support member 24 is a bar member having a predetermined height dimension, and is formed of a material having thermal conductivity.
The upper end of the support member 24 is attached to the four corners of the lower surface of the top plate 13 of the instrument body 11. Since the support member 24 has thermal conductivity, the heat of the first LED 20 generated on the first LED substrate 15 having the same thermal conductivity can be efficiently propagated to the top plate 13.

The second LED board 17 of the second LED unit 16 is an attachment member formed in a substantially U shape with a smaller outer shape than the first LED 15, and is formed of a material having thermal conductivity, and a plurality of second LEDs 25 are formed on the lower surface. Is sealed.
The second LED 25 is disposed behind the first LED 20.
The second LED board 17 has a heat dissipation path in the top plate 13 of the instrument body 11 through the first LED board 15 and the upper space.
The second LED board 17 is routed without the wiring being routed from the mounting adapter 19.
On the lower surface of the second LED substrate 17, an upper end top portion of a reflection plate 26 formed in a substantially hemispherical shape is attached so as to surround the second LED 25.
The reflector 26 is attached to the first LED substrate 15 at its lower end so as to coincide with the opening 23 of the first LED substrate 15.
The reflector 26 is thermally connected to the second LED board 17 and the first LED board 15.
Therefore, the reflection plate 26 becomes a heat dissipation path for the second LED substrate 17 and the first LED substrate 15.

As shown in FIG. 2, the lighting fixture 10 has a first lighting circuit 21 and a second lighting circuit 22 connected in parallel to a commercial AC power source AC.
By driving the first lighting circuit 21, a current i <b> 1 flows through the first LED 20.
By driving the second lighting circuit 22, a current i <b> 2 flows through the second LED 25.
At this time, various patterns of light distribution can be used by lighting only the first LED 20 or lighting only the second LED 25.

The first lighting circuit 21 and the second lighting circuit 22 may be dimmed individually, and can be varied from 0 to 100%, for example.
The first lighting circuit 21 can arbitrarily dim or turn off a selected one of the plurality of first LEDs 20.
Similarly, the second lighting circuit 22 can arbitrarily dim or turn off a selected one of the plurality of second LEDs 25.

As shown in FIG. 3, in the lighting fixture 10, the first lighting circuit 21 lights the first LED 20 at 100% at a time T ₂ after the time T ₁ .
In addition, the first lighting circuit 21 arbitrarily dims the first LED 20 between 100% and 0 at the time T ₄ and the time T ₅ after the time T ₃ .
The second lighting circuit 22, independently of the first lighting circuit 21, between the time _{T 2} to time _{T 3,} arbitrarily dimmed to the first 2LED20 between 0 and 100% to 0.
Further, the second lighting circuit 22, a first 2LED25 lit at time _{T 4,} optionally be dimmed between the first 2LED25 100% to 0 until subsequent time _{T 5.}
In addition, the second lighting circuit 22, the subsequent time point _{T 6,} performs night-light mode of lighting the first 2LED25 at a level of 3%.

At this time, by setting the first LED 20 to white and the second LED 25 to light bulb color differently, a light bulb color spot is generated in the white base light only between time T ₂ and time T _3. Can be generated.
Note that the first LED 20 and the second LED 25 may be of opposite types, and may be mixed in the first LED board 15 and the second LED board 17.

Next, the detailed structure and orientation characteristics of the lighting fixture 10 will be described.
As shown in FIG. 4, only the first LED 20 is lit by the first lighting circuit 21.
The light emitted from the first LED 20 irradiates the irradiation surface which is the floor surface through the cover 18.
At this time, the second LED 25 is not lit.
Therefore, an irradiation range A1 having a light distribution characteristic based only on the light from the first LED 20 is generated.
Irradiation range A1 can acquire uniform illuminance.

As shown in FIG. 5, the first LED 20 is turned on by the first lighting circuit 21, and the second LED 25 is turned on by the second lighting circuit 22.
The light emitted from the first LED 20 irradiates the irradiation surface which is the floor surface through the cover 18.
The light emitted from the second LED 25 is reflected and collected by the reflecting plate 26 and irradiates the irradiation surface, which is the floor surface, through the opening 23 and the cover 18 of the first LED substrate 15.
Therefore, the irradiation range A2 of the light distribution characteristic of the spot light by the light from the second LED 25 is generated in the irradiation range A1 of the light distribution characteristic by the light from the first LED 20.
Thereby, the user can obtain different light distributions through the same cover 18.
Therefore, it is not necessary to add a lamp or the like for generating spot light in addition to the cover 18, and a complex light distribution can be generated while the design is clean on the external surface.
A lens or the like may be used instead of the reflecting plate 26, and a lens or the like may be added to the reflecting plate 26.

As mentioned above, according to the lighting fixture 10 of 1st Embodiment which concerns on this invention demonstrated, since 2nd LED25 is arrange | positioned in the position deeper than 1st LED20, without reducing the efficiency for irradiation, 1st LED20 And the same location can be illuminated by the second LED 25.
Moreover, according to the lighting fixture 10, only 1st LED20, 2nd LED25 only, or various light distribution patterns of 1st LED20 and 2nd LED25 are attained, and it can set arbitrarily.
And according to the lighting fixture 10, even if it attaches the reflecting plate 26 to the 2nd LED25 of the back position, it is hard to prevent the light distribution of 1st LED20.
Furthermore, according to the lighting fixture 10, since the thermal radiation path | route of 1st LED20 and the thermal radiation path | route of 2nd LED25 differ, it can thermally radiate efficiently.
In addition, according to the luminaire 10, since the user does not directly touch the second LED 25 and the reflection plate 26 even when the cover 18 is opened, it is possible to suppress a decrease in light emission efficiency and there is no change in light distribution characteristics.
In addition, according to the luminaire 10, since the first LED board 15 and the second LED board 17 are routed without routing the wiring, there is no fear of disconnection.

According to the lighting fixture 10, since the 2nd LED25 is arrange | positioned corresponding to the opening part 23, the light of 2nd LED20 can be irradiated to the same direction, without losing the light of 1st LED20.
Moreover, according to the lighting fixture 10, since the opening part 23 of the 1st LED board 15 can be utilized for fixation of the reflecting plate 26 of the 2nd LED board 17, a number of parts can be reduced.
And according to the lighting fixture 10, by having arrange | positioned the opening part 23 between 1st LED20, uniform light distribution can be easily achieved only by 1st LED20, without interfering with 2nd LED25.
In addition, according to the lighting fixture 10, the heat of the second LED 25 can be efficiently radiated by the reflector 26.

According to the lighting fixture 10, since the heat radiation of the first LED 20 and the second LED 25 can be favorably performed by the first LED board 15 and the second LED board 17, the life of the first LED 20 and the second LED 25 can be extended.
Further, according to the lighting fixture 10, the first LED circuit 15 can radiate heat from the first lighting circuit 21 and the second lighting circuit 22.

  According to the luminaire 10, since the first LED 20 and the second LED 25 can be dimmed, the illuminance and the irradiation range can be changed even at the same light distribution center, and the production effect can be improved.

According to the lighting fixture 10, in addition to orientation, a color scheme can also be arbitrarily changed by making 1st LED20 and 2nd LED25 into a different kind.
Moreover, according to the lighting fixture 10, the variation of the production | presentation by light distribution switching can be increased further by selecting arbitrarily what turns on or light-controls among 1st LED20 and 2nd LED25.

(Second Embodiment)
Next, the lighting fixture of 2nd Embodiment which concerns on this invention is demonstrated.
In the following embodiments, 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, and the description thereof is simplified or omitted. To do.

As shown in FIG. 6, the lighting fixture 30 of 2nd Embodiment which concerns on this invention is provided with the LED board 31 which has the function of a 1st LED board, and the function of a 2nd LED board.
The LED substrate 31 is molded from a material that is easy to mold, such as a metal material or a resin material.
As shown in FIG. 7, the LED substrate 31 has a concavo-convex cross section composed of a concave surface 32 and a convex surface 33, the first LED 20 is disposed on the lower surface of the concave surface 32, and the second LED 25 is disposed on the lower surface of the convex surface 33.

According to the luminaire 30, the LED substrate 31 can be made uneven by bending a single sheet metal, so that the members can be supplied at low cost.
Moreover, according to the lighting fixture 30, the LED substrate 31 can be stronger in strength than a flat substrate. The same strength can be advantageous in terms of weight because the thickness of the plate can be reduced.
And according to the lighting fixture 30, since a surface area expands compared with a flat board | substrate, heat dissipation can be improved.

(Third embodiment)
Next, the lighting fixture of 3rd Embodiment which concerns on this invention is demonstrated.
As shown in FIG. 8, the illuminating device 40 according to the third embodiment of the present invention includes a first convex surface 42, a second convex surface 43 having a height higher than the first convex surface 42, and a concave / convex cross section. The LED board 41 having
In the LED substrate 41, the first LED 20 is disposed on the lower surface of the concave surface 44, and the second LED 25 is disposed on the lower surfaces of the first convex surface 42 and the second convex surface 43.
In the LED substrate 41, the reflection plate 26 is attached to the inner surfaces of the first convex surface 42 and the second convex surface 53.

  According to the lighting fixture 40, since different light distribution characteristics can be created by the second LEDs 25 arranged on the lower surfaces of the first convex surface 42 and the second convex surface 43, it is possible to further increase the variation of effects due to a plurality of light distributions.

  In addition, in the lighting fixture of this invention, an instrument main body, an outer frame, a top plate, a cover, etc. are not limited to each embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.

10, 30, 40 Lighting fixture 15 First LED board (mounting member)
17 Second LED board (mounting member)
20 1st LED
21 1st lighting circuit 22 2nd lighting circuit 23 Opening part 25 2nd LED
32, 44 Concave surface 33 Convex surface 42 First convex surface (convex surface)
43 Second convex surface (convex surface)

Claims (6)

A plurality of first LEDs arranged on the same plane;
A lighting fixture comprising a plurality of second LEDs arranged at positions deeper than the first LEDs so as to irradiate from between the first LEDs. The lighting fixture according to claim 1,
The mounting member for mounting the first LED has an opening,
The second LED is a lighting fixture arranged at a position corresponding to the opening of the mounting member. The lighting fixture according to claim 1 or 2,
The lighting device in which the mounting member has an uneven cross section, the first LED is disposed on a convex surface of the mounting member, and the second LED is disposed on a concave surface of the mounting member. In the lighting fixture according to claim 2 or claim 3,
A lighting fixture in which the mounting member is formed of a material having thermal conductivity. In the lighting fixture of any one of Claims 1 thru | or 4,
A first lighting circuit for fully lighting or dimming the first LED;
A lighting apparatus comprising: a second lighting circuit that fully lights or dimmes the second LED. In the lighting fixture of any one of Claim 1 thru | or 5,
The first LED and the second LED are different types of lighting fixtures.

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