JP5957765B2 - Lighting equipment and auxiliary light source unit - Google Patents

Description

  The present invention relates to a luminaire and an auxiliary light source unit including a light emitting element such as an LED (Light Emitting Diode) as a light source, and relates to a technique for suppressing a decrease in brightness in the luminaire including the main light source unit and the auxiliary light source unit.

In recent years, lighting fixtures using a light source unit that uses a light emitting element such as an LED (Light Emitting Diode) as a light source are becoming widespread. On the other hand, as a lighting fixture for buildings, a lighting fixture such as a ceiling light in which a light source unit is housed in a region surrounded by a cover and a fixture main body is generally used.
For example, Patent Literature 1 proposes a ceiling light type lighting fixture including a light source unit including a light emitting element. FIG. 12 is a cross-sectional view of the lighting fixture described in Patent Document 1. The lighting fixture 900 includes a fixture body 903, a main light source unit 910, a power supply unit 940, and a cover 950. The main light source unit 910 includes a main light emitting module 912 including a mounting board and LEDs, and a diffusion lens 911 provided on the surface thereof. The main light emitting module 912 is disposed on the front side of the instrument main body 903. The cover 950 is fixed to the instrument main body 903 so as to cover the main light source unit 910. The material constituting the cover 950 is a light transmissive material.

  The lighting fixture 900 is attached to the ceiling with the cover 950 facing downward. Light emitted from the main light emitting module 912 passes through the diffusion lens 911 and the cover 950 and is extracted outside the lighting fixture 900. When the lighting fixture 900 is attached to the ceiling indoors, the emitted light from the main light source unit 910 spreads from just below the lighting fixture 900 to below the wall.

JP 2012-146441 A

  By the way, when the conventional lighting fixture is attached to a ceiling in a room, for example, there may be a range where light emitted from the main light source unit does not reach, such as above the ceiling and walls. If there is a range where the emitted light does not reach in the room, the user generally tends to feel the entire room dark. On the other hand, in addition to the structure of the conventional lighting fixture, there is a measure of providing an auxiliary light source unit that illuminates the upper part of the ceiling and the wall. Here, the auxiliary light source unit is arranged on the ceiling side, that is, on the back side of the plate-like part opposite to the side on which the main light source unit of the plate-like part is provided, and light is emitted in a direction parallel to the back surface of the plate-like part. May be emitted.

However, in this configuration, a part of the light emitted from the main light source unit from the auxiliary light source unit may be blocked by the back surface of the plate-like portion. As a result, the upper part of the wall may become dark.
In view of the above-described problems, an object of the present invention is to provide a luminaire that includes a main light source unit and an auxiliary light source unit and suppresses a decrease in brightness due to blocking of light emitted from the auxiliary light source unit.

  In order to achieve the above object, a lighting fixture according to one aspect of the present invention includes a fixture main body having a plate-like portion made of a non-translucent material, a main light source unit provided on the front side of the plate-like portion, An auxiliary light source unit that is provided on the back side of the plate-like portion and includes a plurality of linear light sources, and the plurality of linear light sources have their longitudinal directions parallel to the back surface of the plate-like portion. The offset amounts from the back surfaces of the respective plate-like portions are arranged at positions different from each other, and the plurality of linear light sources include a plurality of types of light emitting elements having different light emission efficiency, and the plurality of linear light sources Among these, in at least two linear light sources, a linear light source having a larger offset amount from the back surface of the plate-like portion includes a larger number of types of light emitting elements having the highest luminous efficiency.

  In the lighting fixture according to one aspect of the present invention, in the auxiliary light source unit, a plurality of linear light sources are arranged at positions where the offset amounts from the back surface of the plate-like portion are different from each other. Here, for example, when the luminaire is mounted on a ceiling in a room, a linear light source having a larger offset amount from the back surface of the plate-like portion is emitted from the light emitting element included in the linear light source to the upper side of the wall. However, it can suppress that it is interrupted | blocked by the back surface of a plate-shaped part. This is because, as the linear light source has a larger offset amount from the back surface of the plate-like portion, the limit of the emitted light from the included light-emitting elements is not blocked by the back surface of the plate-like portion and is directed downward. And in the lighting fixture which concerns on 1 aspect of this invention, when the at least 2 linear light source from which the offset amount differs from the back surface of a plate-shaped part in an auxiliary light source unit is seen, the line with the larger offset amount from the back surface of a plate-shaped part The light source includes many types of light emitting elements that have the highest luminous efficiency than the smaller linear light source. Therefore, the emitted light from the type of light emitting element having the highest luminous efficiency can easily reach the upper part of the wall, and the emitted light having a high luminance spreads above the wall. This is because, when the same power is supplied to the light emitting element, the light emitting element with higher luminous efficiency has a higher luminance of the emitted light. Thereby, the upper part of a wall becomes still brighter. As a result, the user feels that the brightness of the entire room has improved.

  In this way, in a luminaire including the main light source unit and the auxiliary light source unit, it is possible to suppress a decrease in brightness due to blocking of light emitted from the auxiliary light source unit.

It is the disassembled perspective view which looked at the lighting fixture which concerns on embodiment from the front side. It is the disassembled perspective view which looked at the lighting fixture shown in FIG. 1 from the back side. It is sectional drawing of the lighting fixture shown in FIG. FIG. 4 is a partially enlarged view of a cross-sectional view of the luminaire shown in FIG. 3. It is a disassembled perspective view of the auxiliary light source unit in the lighting fixture shown in FIG. It is a circuit diagram of the light emitting module of the auxiliary light source unit in the lighting fixture shown in FIG. It is a schematic diagram of the light emission module of the auxiliary light source unit in the lighting fixture shown in FIG. It is sectional drawing which shows the effect of the lighting fixture shown in FIG. It is a figure which shows the effect of the lighting fixture shown in FIG. 1, Comprising: (a) is a figure which concerns on a comparative example, (b) is a figure which concerns on the lighting fixture shown in FIG. It is a schematic diagram of the light emission module of the auxiliary light source unit in the lighting fixture which concerns on a modification, Comprising: (a) shows the modification of a linear light source, (b) shows the modification in which the luminous efficiency of LED is two types. FIG. It is a schematic diagram of the light emission module of the auxiliary light source unit in the lighting fixture which concerns on a modification, Comprising: (a) shows the modification by which LED with the highest luminous efficiency is arrange | positioned at all the linear light sources, (b) is mounting It is a figure which shows the modification which a board | substrate has three arrangement | positioning area | regions. It is sectional drawing of the conventional lighting fixture.

<< Embodiment >>
A lighting fixture according to one embodiment of the present invention will be described with reference to the drawings. Hereinafter, a mode in which an LED (Light Emitting Diode) is used as the light emitting element will be described.
Drawing 1 is an exploded perspective view which looked at the lighting fixture concerning an embodiment from the front side. FIG. 2 is an exploded perspective view of the luminaire as seen from the back side.
1. Overall Configuration As shown in FIG. 1, the lighting fixture 1 includes a fixture body 3, a main light source unit 10, a center light source unit 20, an auxiliary light source unit 30, a power supply unit 40, a cover 50, a cover 60, Is provided. The lighting fixture 1 is a ceiling light used by being attached to a ceiling.
2. Configuration of each part (equipment body)
The instrument main body 3 includes a plate-like portion 5 and a crown-like portion 7 provided on the back side of the plate-like portion 5. The plate-like portion 5 has a disc shape with a through-hole 5a provided at the center, an annular flat plate portion 5b, an annular central portion 5c that extends to the inside of the flat plate portion 5b and rises one step, And an annular outer peripheral portion 5d that extends outward from the flat plate portion 5b and goes down one step. The crown-shaped part 7 is a flat rectangular tube (the side surface of the tube is indicated by 7a), the lower end of the rectangular tube is extended outward, and the contour of the extended end is finished in a circular shape. Hereinafter, the inside of the extended end is referred to as a flat portion 7b, and the contour portion of the extended end is referred to as a flange portion 7c. The upper end of the rectangular tube is closed by a top plate 7e provided with a through hole 7d. A cover 50 is fixed to the outer peripheral portion 5 d of the plate-like portion 5. The cover 50 is fixed to the plate-like portion 5 by being sandwiched between the receiving tools 51.

As shown in FIG. 2, four packings 61 are provided on the top plate 7 e of the crown-shaped portion 7 at equal intervals. The packing 61 prevents the cover 60 and the like from directly contacting the ceiling. The material constituting the packing 61 is, for example, a translucent silicone resin. Returning to FIG. 1, the crown portion 7 is fixed to the plate portion 5 by being screwed through screw holes provided in the outer peripheral portion 5 d of the plate portion 5 and the flange portion 7 c of the crown portion 7. A power supply unit 40 is accommodated in a space surrounded by the plate-like portion 5 and the crown-like portion 7. The material which comprises the plate-shaped part 5 and the crown-shaped part 7 is a non-light-transmissive material like an iron alloy or aluminum, for example. When the plate-like portion 5 and the crown-like portion 7 are formed of aluminum, for example, they may be formed by pressing. The material which comprises the plate-shaped part 5 and the crown-shaped part 7 may be the same, and may differ.
(Main light source unit)
As shown in FIG. 1, the main light source unit 10 includes a main light emitting module 12 and a main light source lens 11 provided on the surface thereof. The main light emitting module 12 is configured by arranging four subunits 13 side by side. Each subunit 13 includes a 1/4 arc-shaped mounting board 13a and a plurality of LEDs 13b disposed on the surface of the mounting board 13a. Since four 1/4 arc-shaped mounting boards 13a are arranged side by side, the main light source unit 10 has an annular shape as a whole. The light emission color of each LED 13b is, for example, white. The main light source lens 11 is a lens that diffuses light emitted from the main light emitting module 12. The shape of the main light source lens 11 is an annular shape in which a portion located above the LED 13b is convex. The material which comprises the main light source lens 11 is translucent materials, such as an acrylic resin, polycarbonate resin, glass, for example. The main light emitting module 12 is sandwiched between the main light source lens 11 and the plate-like portion 5, screwed through screw holes provided on the inner and outer periphery of the main light source lens 11, and fixed to the main light source lens 11 and the plate-like portion 5. Yes.

The main light source unit 10 is disposed on the front side of the flat plate portion 5b of the plate-like portion 5 so as to overlap each other in the Z-axis direction shown in FIG. Thus, as shown in FIG. 3, the center light source unit 20 is provided on the front side of the flat plate portion 5 b of the plate-like portion 5 with the main emission direction being a direction perpendicular to the plate-like portion 5.
(Center light source unit)
The center light source unit 20 includes a center light emitting module 22 and a center lens 21 provided on the surface thereof. The center light emitting module 22 includes an annular mounting board 22a and a plurality of LEDs 22b arranged circumferentially. The light emission color of each LED 22b is, for example, white. The center lens 21 is a lens that diffuses light emitted from the center light emitting module 22. Similar to the shape of the main light source lens 11, the center lens 21 has an annular shape in which a portion located above the LED 22 b is convex. The material which comprises the center lens 21 is translucent materials, such as an acrylic resin, polycarbonate resin, glass, for example.

The center light source unit 20 is disposed on the front side of the central portion 5c of the plate-like portion 5 so as to overlap in the Z-axis direction shown in FIG. Thereby, as shown in FIG. 3, the main light source unit 10 is provided on the front side of the central portion 5 c of the plate-like portion 5 with the main emission direction being a direction perpendicular to the plate-like portion 5.
(Auxiliary light source unit)
Hereinafter, members constituting the auxiliary light source unit 30 will be described with reference to an exploded perspective view of FIG. As shown in FIG. 5, the auxiliary light source unit 30 includes a base 31, a light emitting module 30a provided on the base 31, and a translucent cover 35 that covers the light emitting module 30a. In order to assemble the auxiliary light source unit 30, first, the mounting substrate 32 is attached to the mounting portion 31a of the base 31 with an adhesive. Then, the base 31 to which the mounting substrate 32 is attached and the translucent cover 35 may be screwed and fixed.

  The base 31 includes a mounting portion 31a for mounting the mounting substrate 32, and a fixing portion 31b extending from the mounting portion 31a. The mounting part 31a is provided so as to stand on the fixing part 31b. The light emitting module 30 a includes a mounting substrate 32, two linear light sources 32 a 1 and 32 b 1 provided on the surface of the mounting substrate 32, and two connectors 34. The shape of the mounting substrate 32 is rectangular. In each of the linear light sources 32a1 and 32b1, 12 LEDs 33 are arranged in a straight line. Regions where the linear light sources 32a1 and 32b1 are arranged on the mounting substrate 32 are referred to as arrangement regions 32a and 32b. The material which comprises the translucent cover 35 is translucent materials, such as a silicone resin, an acrylic resin, a polycarbonate resin, glass, for example. The translucent cover 35 has light diffusibility. Therefore, the emitted light emitted from the LED 33 and transmitted through the translucent cover 35 further spreads over a wide range. In order to add light diffusibility to the translucent cover 35, similarly to the inner surface of the cover 50, a diffusion process for diffusing light emitted from the light source, for example, a diffusion process using silica, white pigment, or the like is performed on the inner surface. Good.

  LED33 is comprised by the sealing member comprised by the LED chip and resin material, for example. The LED chip is mounted by, for example, SMD (Surface Mount Device). Although not shown in FIG. 5, the 24 LEDs 33 included in the linear light sources 32a1 and 32b1 include six white LEDs 33a, light bulb color LEDs 33b, orange LEDs 33d, and blue LEDs 33c. Therefore, the emission color of the emitted light from the auxiliary light source unit 30 is, for example, white, light bulb color, orange color, blue color, and a mixed color thereof. The connector 34 is supplied with electric power from wiring (not shown) drawn from the power supply unit 40 and supplies it to the wiring pattern formed on the mounting substrate 32.

  The LED 33 is connected in series for each LED 33 having the same emission color. Terminals are drawn out from the LEDs 33 connected in series, and the terminals are individually connected to corresponding terminals of the connector 34. Specifically, the white LED 33a, the light bulb color LED 33b, the orange LED 33d, and the blue LED 33c are electrically connected in series. And four LED33 groups electrically connected in series are mutually electrically connected in parallel. Thereby, LED33 from which luminescent color differs can be lighted separately. As a result, the emitted light of the auxiliary light source unit 30 can be toned. For example, in order to brighten the room, a large current may be supplied to the white LED 33a. This is shown in a circuit diagram in FIG.

  Next, the arrangement of the auxiliary light source unit 30 will be described with reference to FIG. 2 and an enlarged view of a region α surrounded by a two-dot chain line in the cross-sectional view of FIG. The crown-shaped portion 7 provided with the auxiliary light source unit 30 is arranged to overlap the back side of the plate-shaped portion 5 in the Z-axis direction shown in FIG. As a result, as shown in FIG. 4, the auxiliary light source unit 30 is arranged on the back side of the plate-like portion 5 with the main emission direction being a direction parallel to the plate-like portion 5. More specifically, the auxiliary light source unit 30 is screwed to the flat portion 7 b of the crown-shaped portion 7 through a screw hole provided in the fixing portion 31 b of the base 31 and is fixed to the crown-shaped portion 7. As a result, the mounting substrate 32 is fixed to the crown-shaped portion 7 in a state of being erected on the plate-shaped portion 5.

Further, the arrangement of the linear light sources 32a1 and 32b1 will be described. The linear light sources 32 a 1 and 32 b 1 are arranged on the front surface of the mounting substrate 32 fixed in a state of being erected on the plate-like portion 5, and the offset amounts from the back surface of the plate-like portion 5 are different from each other. The offset amounts from the back surface of the plate-like portion 5 of the linear light sources 32a1 and 32b1 are h1 and h2, respectively. The offset amount h1 from the linear light source 32a1 is larger than the offset amount h2 from the linear light source 32b1. The longitudinal directions of the linear light sources 32 a 1 and 32 b 1 are parallel to the back surface of the plate-like portion 5. Due to such an arrangement relationship, the main emission direction of the linear light sources 32 a 1 and 32 b 1 is parallel to the back surface of the plate-like portion 5.
(Power supply unit)
Returning to FIG. 1, the power supply unit 40 includes a control block 42 and a power supply block 43 provided on the surface of the insulating plate 41. A control board is accommodated in the case of the control block 42. The control board and the power supply block 43 are connected by a tape electric wire 42a. For example, the control block 42 receives a lighting signal and a non-lighting signal output from a remote controller that can be operated by the user, and outputs a control signal to the power supply block 43. The power supply block 43 includes a substrate and various electronic components mounted on the substrate. The circuit included in the power supply block 43 converts the supplied alternating current into a desired direct current. The power supply line 42b drawn from the power supply block 43 is connected to a power supply outlet through the through hole 7d of the crown portion 7 and the through hole 60a of the cover 60.
(cover)
The cover 50 is formed in a bottomed cylindrical shape that covers the plate-like portion 5. The material which comprises the cover 50 is translucent materials, such as a silicone resin, an acrylic resin, a polycarbonate resin, glass, for example. The inner surface of the cover 50 is subjected to a diffusion process for diffusing light emitted from the center light source unit 20 and the main light source unit 10, for example, a diffusion process using silica, white pigment, or the like.

The cover 60 has a through hole 60 a in the center and is formed in a disk shape that covers the auxiliary light source unit 30. The material which comprises the cover 60 is translucent materials, such as an acrylic resin, polycarbonate resin, glass, for example.
(Summary)
With this configuration, the emitted light from the center light source unit 20 and the main light source unit 10 passes through the cover 50 and is extracted to the outside of the lighting fixture 1. Further, by providing the center light source unit 20 inside the annular main light source unit 10, uneven brightness of the luminaire 1 is suppressed. Furthermore, by providing the auxiliary light source unit 30 on the back side of the plate-like portion, it is possible to illuminate the upper part of the ceiling or wall where the emitted light from the main light source unit 10 does not reach.

Hereinafter, the light emitting module 30a of the auxiliary light source unit 30, which is the main configuration of the present invention, will be described in more detail.
2. Detailed configuration of light emitting module 30a (LED arrangement)
FIG. 7 is a schematic diagram of a light emitting module of an auxiliary light source unit in the lighting fixture shown in FIG.

  As shown in FIG. 7, the linear light source 32a1 includes six white LEDs 33a and six blue LEDs 33c. The linear light source 32b1 includes six light bulb color LEDs 33b and six orange LEDs 33d. Thus, there are four types of light emission colors of the LEDs 33 included in the light emitting module 30a. The luminous efficiencies of the white LED 33a, the light bulb color LED 33b, the blue LED 33c, and the orange LED 33d are, for example, 118 lm / W, 97 lm / W, 26 lm / W, and 80 lm / W. Among the LEDs 33, the type having the highest luminous efficiency is the white LED 33a. Of the linear light sources 32a1 and 32b1, the linear light source 32a1 having the larger offset amount from the back surface of the plate-like portion 5 includes all of the white LEDs 33a having the highest luminous efficiency.

Further, the light emission colors of the adjacent LEDs 33 included in the linear light sources 32a1 and 32b1 are different. Thereby, when adjacent LED33 is lighted simultaneously, the emitted light from which the emitted light color radiate | emitted from adjacent LED33 differs is easy to be mixed. Therefore, the color unevenness of the emitted light from the auxiliary light source unit 30 can be suppressed.
(Light emitted from LED)
By the way, the emitted light from the LED 33 included in the linear light sources 32a1 and 32b1 has different irradiation ranges due to the difference in the offset amount from the back surface of the plate-like portion 5. This will be described using a cross-sectional view showing the effect of the lighting fixture. La and Lb in FIG. 8 respectively indicate limit light emitted from the white LED 33a and the light bulb color LED 33b that is not blocked by the back surface of the plate-like portion 5. The white LED 33a is included in the linear light source 32a1 having a larger offset amount from the back surface of the plate-like portion 5, and the light bulb color LED 33b is included in the linear light source 32b1 having a smaller offset amount. As shown in FIG. 8, the emitted light La from the white LED 33a is directed downward from the emitted light Lb from the light bulb color LED 33b. Therefore, the emitted light La from the white LED 33a reaches the lower side above the wall 70 more than the emitted light Lb from the light bulb color LED 33b. Thus, the linear light source 32a1 having a larger offset amount from the back surface of the plate-like portion 5 can prevent the light emitted from the LED 33 included above the wall 70 from being blocked by the back surface of the plate-like portion 5. In addition, the effect is so remarkable that the distance of the lighting fixture 1 and the wall 70 is large. Hereinafter, the effect by this structure is demonstrated in detail.
3. Effect FIG. 9 is a diagram illustrating an effect of the lighting apparatus illustrated in FIG. 1. In addition, FIG. 9 has shown the case where the lighting fixture is attached to the ceiling indoors. FIG. 9A is a diagram according to a comparative example. FIG.9 (b) is a figure which concerns on the lighting fixture shown in FIG. The lighting fixture 1000 in the comparative example includes the white LED 33a in the auxiliary light source unit 1040 only in the linear light source 32b1 having a small offset amount from the back surface of the plate-like portion 5. In the lighting device 1 of the present invention, the white LED 33a is included only in the linear light source 32a1 having a large offset amount from the back surface of the plate-like portion 5. Except for this point, the lighting fixtures 1 and 1000 have the same configuration.

  As shown to Fig.9 (a), in the lighting fixture 1000, the emitted light from the auxiliary light source unit 1040 reaches the upper end of the wall 70 from the ceiling 71 shown by L1000. Moreover, the emitted light from the center light emitting module 22 and the main light emitting module 12 reaches the floor 72 from below the wall 70 indicated by L2. On the other hand, as shown in FIG. 9B, in the lighting fixture 1, the emitted light from the center light emitting module 22 and the main light emitting module 12 is emitted from below the wall 70 indicated by L <b> 2 as in the case of the lighting fixture 1000. It reaches the floor 72. However, the emitted light from the auxiliary light source unit 30 reaches from the ceiling 71 indicated by L1 to above the wall 70 in a wider range than in the case of the lighting fixture 1000.

  As described above, the linear light source 32 a 1 having a larger offset amount from the back surface of the plate-like portion 5 can suppress the light emitted upward from the LED 33 included from being blocked by the back surface of the plate-like portion 5. Specifically, the lower limit of the emitted light from the white LED 33a is La shown in FIG. Here, when the same electric power is supplied to the LED 33, the brightness of the emitted light increases as the white LED 33a having higher luminous efficiency. Therefore, the brightness of the emitted light reaching from the auxiliary light source unit 30 in the region L1a above the wall in the L1 because the linear light source 32a1 having the larger offset amount from the back surface of the plate-like part 5 includes the white LED 33a. Becomes larger. That is, in the lighting fixture 1, the upper L1a of the wall 70 can be brightened. As a result, the user can experience that the brightness of the entire room is improved.

Thus, in the lighting fixture 1 provided with the main light source unit 10 and the auxiliary light source unit 30, it is possible to suppress a decrease in brightness due to the blocking of the emitted light from the auxiliary light source unit 30.
<< Modification >>
Hereinafter, modifications of the auxiliary light source unit according to the present invention will be described with reference to FIGS. 10 and 11. About a modification, only difference between both is demonstrated and description is abbreviate | omitted using the same code | symbol about a common structure.

10 and 11 are schematic views of a light emitting module of an auxiliary light source unit in a lighting fixture according to a modification.
1. Configuration of Linear Light Source As shown in FIG. 10A, in the light emitting module 130a, linear light sources 132a1 and 132b1 composed of two groups of LEDs 33 arranged in a line are arranged in each arrangement region 132a and 132b. May be. Here, all of the white LEDs 33 a are included in the linear light source 132 a 1 having a larger offset amount from the back surface of the plate-like portion 5. Even with this configuration, in a lighting fixture including the main light emitting module 12 and the auxiliary light source unit 130, it is possible to suppress a decrease in brightness due to blocking of light emitted from the auxiliary light source unit 130.

As another configuration of the linear light source, for example, each linear light source may be composed of a group of LEDs arranged in three or more lines. In addition, arrangement | positioning of LED33 is not restricted to linear form, For example, a polygonal line form, a curve form, etc. may be sufficient. Moreover, in the said embodiment etc., the linear light source is arrange | positioned at the mounting board | substrate so that the longitudinal direction of several linear light sources may become parallel with respect to the back surface of a plate-shaped part. The phrase “parallel to the back surface of the plate-like portion” as used herein may not be completely parallel, but may not be parallel as long as a manufacturing error occurs.
2. Types of LEDs As shown in FIG. 10B, in the light emitting module 230a, the 24 LEDs 33 may include 12 white LEDs 33a and 12 light bulb color LEDs 33b. Here, all of the white LEDs 33 a are included in the linear light source 232 a 1 having a larger offset amount from the back surface of the plate-like portion 5. All of the light bulb color LEDs 33b are included in the linear light source 232b1 having a smaller offset amount from the back surface of the plate-like portion 5. Even in this configuration, in a lighting fixture including the main light emitting module 12 and the auxiliary light source unit 230, it is possible to suppress a decrease in brightness due to blocking of the emitted light from the auxiliary light source unit 230. Thus, the present invention can be applied if there are a plurality of types of light emission efficiency of the LED.
3. Arrangement of LEDs with Highest Luminous Efficiency As shown in FIG. 11A, in the light emitting module 330a, six white LEDs 33a are included in the linear light source 332a1 having a larger offset amount from the back surface of the plate-like portion 5. It is. Further, the three white LEDs 33a are included in the linear light source 332b1 having a smaller offset amount from the back surface of the plate-like portion 5. Thus, among the linear light sources 332a1 and 332b1, the linear light source 332a1 with the larger offset amount from the back surface of the plate-like portion 5 has more white LEDs 33a than the linear light source 332b1 with the smaller offset amount. Including. For this reason, even in this configuration, in a lighting fixture including the main light emitting module 12 and the auxiliary light source unit 330, it is possible to suppress a decrease in brightness due to blocking of light emitted from the auxiliary light source unit 330.
4. Arrangement Regions More Than Two As shown in FIG. 11B, the light emitting module 430a includes three linear light sources 432a1, 432b1, 432c1 in order of increasing offset from the back surface of the plate-like portion 5. Have Six white LEDs 33a are included in the linear light source 432a1 having the largest offset amount. Three white LEDs 33a are included in the central linear light source 432b1. Furthermore, one white LED 33a is included in the linear light source 432c1 having the smallest offset amount. As described above, among the linear light sources 432a1, 432b1, and 432c1, a linear light source having a larger offset amount from the back surface of the plate-like portion 5 has more white LEDs 33a arranged therein. Therefore, even in this configuration, in the luminaire 1 including the main light emitting module 12 and the auxiliary light source unit 430, it is possible to provide an illuminating device that suppresses a decrease in brightness due to blocking of light emitted from the auxiliary light source unit 430.

In the configuration in which the linear light source having the larger offset amount from the back surface of the plate-like portion 5 contains more white LEDs, the effect of the present invention is most remarkable. However, the structure of the lighting fixture of this invention is not restricted to this. For example, in at least one set of adjacent linear light sources among the three linear light sources, the linear light source having the larger offset amount from the back surface of the plate-like portion 5 includes more white LEDs 33a, and the remaining The adjacent linear light sources in the set can achieve the above-described effects even when the same number of white LEDs 33a are included.
5. Mounting board and arrangement area In the above-mentioned embodiment etc., the mounting board was rectangular. However, the shape is not limited to this, and may be other shapes such as an elliptical shape and other polygonal shapes. Further, the arrangement region is not limited to the rectangular shape, and may be another shape such as an elliptical shape or another polygonal shape. The shape of the mounting substrate and the shape of the arrangement substrate can be arbitrarily combined. In addition, the number of arrangement | positioning area | regions should just be not only two and three but multiple.
6). Others While the configuration of the lighting fixture according to the present invention has been described based on the embodiment and the modification, the present invention is not limited to the embodiment and the modification. For example, the structure which combined suitably the said embodiment and the partial structure of the modification may be sufficient. In addition, the materials, numerical values, and the like described in the above embodiments are merely preferable examples and are not limited thereto. Furthermore, it is possible to appropriately change the configuration without departing from the scope of the technical idea of the present invention.
(Auxiliary light source unit)
In the above embodiment and the like, four auxiliary light source units are provided. However, the number of auxiliary light source units is not limited to four, and an arbitrary number may be provided.
(Light emitting element)
In the above embodiment and the like, white LEDs are cited as the types of LEDs having the highest luminous efficiency, and the arrangement of the white LEDs has been described. However, the present invention can be applied not only to white LEDs but also to the arrangement of LEDs with the highest luminous efficiency. Moreover, the light emitting element according to the present invention is not limited to the LED. The light emitting element may be, for example, an LD (laser diode) or an EL element (electric luminescence element).
(Electrical connection)
In the said embodiment, although LED was connected in series for every luminescent color, it is not restricted to this. For example, if a plurality of linearly arranged LEDs included in each linear light source are electrically connected in series, and each linear light source is electrically connected in parallel to each other, the LEDs are individually arranged in each arrangement region. Can emit light.
(lighting equipment)
In the above embodiment and the like, a ceiling light is used as a lighting fixture. However, the present invention is not limited to this, and the present invention can also be used in, for example, a lighting fixture for buildings other than a ceiling light such as a downlight, and a lighting fixture other than a building lighting fixture such as a backlight.

DESCRIPTION OF SYMBOLS 1,900,1000 Lighting fixture 3 Appliance main body 5 Plate-shaped part 7 Crown-shaped part 10 Main light source unit 20 Center light source unit 30 Auxiliary light source unit 33 LED
33a White LED
33b Light bulb color LED
33c Blue LED
33d Orange LED

Claims (8)

An instrument body having a plate-like portion made of a non-translucent material;
A main light source unit provided on the front side of the plate-like portion;
An auxiliary light source unit provided on the back side of the plate-like portion, and provided with a plurality of linear light sources;
With
The plurality of linear light sources are arranged in positions where the respective longitudinal directions are parallel to the back surface of the plate-shaped portion, and the offset amounts from the back surfaces of the respective plate-shaped portions are different from each other.
The plurality of linear light sources include a plurality of types of light emitting elements having different light emission efficiency,
In at least two linear light sources among the plurality of linear light sources, a linear light source having a larger offset amount from the back surface of the plate-like portion includes a larger number of types of light emitting elements having the highest luminous efficiency.
A lighting apparatus characterized by that. Of the plurality of linear light sources, the linear light source having the largest offset amount from the back surface of the plate-like portion includes the most light emitting elements of the type having the highest luminous efficiency.
The lighting fixture according to claim 1. In the plurality of linear light sources , a linear light source having a larger offset amount from the back surface of the plate-like portion includes a larger number of types of light emitting elements having the highest luminous efficiency.
The lighting fixture according to claim 1. The light emitting colors of adjacent light emitting elements included in each linear light source are different.
The lighting fixture according to claim 1. The plurality of light emitting elements included in each linear light source are each electrically connected in series,
The linear light sources are electrically connected to each other in parallel.
The lighting fixture according to claim 1. The emission color of the type of light emitting element having the highest luminous efficiency is white.
The lighting fixture according to claim 1. The auxiliary light source unit includes a cover that is provided so as to cover the plurality of linear light sources and has light diffusibility.
The lighting fixture according to claim 1. An instrument body having a plate-like portion made of a non-translucent material;
A main light source unit provided on the front side of the plate-like portion;
In an illuminating device comprising: an auxiliary light source unit that is provided and used on the back side of the plate-like part in a state in which the longitudinal direction is parallel to the back surface of the plate-like part,
With multiple linear light sources,
The plurality of linear light sources are arranged at positions where the offset amounts from the back surfaces of the respective plate-like portions are different from each other,
The plurality of linear light sources include a plurality of types of light emitting elements having different light emission efficiency,
In at least two linear light sources among the plurality of linear light sources, a linear light source having a larger offset amount from the back surface of the plate-like portion includes a larger number of types of light emitting elements having the highest luminous efficiency.
An auxiliary light source unit characterized by that.

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