JP2017107821A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control light distribution of the light of a plurality of kinds of colors separately.SOLUTION: On a light guide plate 3 of a lighting fixture X, a first light distribution control part 34 and a second light distribution control part 35 are provided. The first light distribution control part 34 mainly controls the light distribution of first light emitted from a first surface 30 and a second surface of the light guide plate 3. The second light distribution control part 35 mainly controls the light distribution of second light. Therefore, the lighting fixture X can control the light distribution of the light of the plurality of kinds of colors of the first light and the second light separately.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a luminaire, and more particularly to a luminaire that guides light emitted from a plurality of types of solid-state light emitting elements having different emission colors from each other by a light guide plate and irradiates the illumination space.

  As a conventional example, an illumination device described in Patent Document 1 is illustrated. The illuminating device described in Patent Literature 1 includes a chassis serving as a device main body, a plurality of LED modules held by the chassis, and a light guide plate that controls the direction of light from the plurality of LED modules. The chassis is formed of a metal material in a disc shape. The LED module is mounted in a row along a rectangular plate-shaped LED substrate, along the long side of the LED substrate, and is mounted between a plurality of daylight color LEDs that emit daylight color light and a plurality of daylight color LEDs. And a plurality of light bulb colored LEDs. The LED module is held by the light source holding unit and attached to one surface of the chassis.

  The light guide plate is made of acrylic resin into a disc shape having a regular octagonal hole in the center that matches the arrangement shape of the LED module. The light guide plate is configured to guide light of the LED module incident from the inner peripheral surface of the central hole. On one surface of the light guide plate, a plurality of reflection dots are printed as reflection portions that diffusely reflect light from the LED module. The reflective dot has a circular shape, and is provided so that the area for irregularly reflecting light from the LED module, specifically, the area of the reflective dot, is large or small depending on the distance from the LED module. The light that has entered the light guide plate from the LED module is irregularly reflected by the reflective dots, and part of the light is emitted from the other surface of the light guide plate, so that substantially uniform surface light emission can be performed.

JP 2011-222420 A

  By the way, in a structure like the illuminating device of patent document 1, it controls separately the light distribution of the daylight color light radiated | emitted from daylight color LED, and the light distribution of the light bulb color light radiated | emitted from light bulb color LED. I could not.

  The present invention has been made in view of the above problems, and an object thereof is to separately control the light distribution of a plurality of types of colors.

  The lighting fixture of the present invention has a first light source that emits first light, a second light source that emits second light having a light color different from that of the first light, and a plate shape having translucency. One or a plurality of light guide plates formed on the housing, and a housing that supports the first light source, the second light source, and the light guide plate, and the housing extends along a thickness direction of the light guide plate. At least one end surface of a plurality of end surfaces and the first light source and the second light source are supported to face each other, and the light guide plate includes the first light and the second light incident from the end surface. Of the plurality of end surfaces, and at least one of the first surface and the second surface that are opposed to the first light source and the second light source and are opposed along the thickness direction. Configured to emit the first light and the second light from any one of the surfaces; and The light guide plate has one first light distribution control unit and one second light distribution control unit on each of the first surface and the second surface that emits the first light and the second light. Or, a plurality of the first light distribution control units are configured to mainly control the light distribution of the first light, and the second light distribution control unit is mainly configured to distribute the second light. It is configured to control light.

  The lighting fixture of the present invention has an effect that light distribution of light of a plurality of types can be controlled separately.

It is a perspective view of the lighting fixture which concerns on Embodiment 1 of this invention. It is a bottom view of the lighting fixture which concerns on Embodiment 1 of this invention. It is the side view seen from the longitudinal direction of the lighting fixture which concerns on Embodiment 1 of this invention. It is the partially broken side view seen from the transversal direction of the lighting fixture which concerns on Embodiment 1 of this invention. It is the fragmentary sectional view which abbreviate | omitted one part of the housing | casing and light-guide plate in the lighting fixture which concerns on Embodiment 1 of this invention. 6A to 6C are projection views of modifications of the prism in the lighting fixture according to Embodiment 1 of the present invention. 7A and 7B are projection views of a modification of the prism in the lighting apparatus according to Embodiment 1 of the present invention. 8A to 8C are explanatory diagrams for explaining the light distribution characteristics of the lighting fixture according to Embodiment 1 of the present invention. It is a perspective view of the lighting fixture which concerns on Embodiment 2 of this invention. It is a disassembled perspective view of the lighting fixture which concerns on Embodiment 2 of this invention. It is a bottom view of the lighting fixture which concerns on Embodiment 2 of this invention. FIG. 12A is a perspective view of the first LED module in the lighting fixture according to Embodiment 2 of the present invention, and FIG. 12B is a perspective view of the second LED module in the lighting fixture according to Embodiment 2 of the present invention. FIG. 13A is a side view of a lighting fixture according to Embodiment 2 of the present invention, and FIG. 13B is a side sectional view of the lighting fixture according to Embodiment 2 of the present invention. It is the top view which abbreviate | omitted partially including the 1st light distribution control part of the lighting fixture which concerns on Embodiment 2 of this invention, and a 2nd light distribution control part.

  Hereinafter, the lighting fixture which concerns on embodiment of this invention is demonstrated in detail with reference to drawings. The configurations described in the following embodiments are merely examples of the present invention. The present invention is not limited to the following embodiments, and various modifications can be made according to the design and the like as long as they do not depart from the technical idea of the present invention.

(Embodiment 1)
As illustrated in FIGS. 1 to 5, a lighting fixture X (hereinafter abbreviated as a lighting fixture X) according to Embodiment 1 of the present invention includes a housing 1, a plurality of LED modules 2, and a plurality of pieces (in the illustrated example). 2 light guide plates 3. However, in the following description, unless otherwise specified, as shown in FIG. 1, the height direction, the longitudinal direction, and the short direction of the housing 1 are defined as a vertical direction, a horizontal direction, and a front-rear direction, respectively.

  The housing 1 is formed in a flat and hollow rectangular parallelepiped shape with the left-right direction as the longitudinal direction by, for example, a metal plate or a synthetic resin molded body. The housing 1 has two support columns 100 projecting upward from the vicinity of both left and right ends on the upper surface (see FIG. 1). The housing 1 is supported by being suspended from the ceiling by two columns 100. In addition, the housing 1 is formed with linear grooves 10 along the longitudinal direction (left-right direction) on the front side surface and the rear side surface, respectively. In addition, each groove | channel 10 has reached to the side surface of the right-and-left both sides of the housing | casing 1 (refer FIG.1 and FIG.3).

  The two light guide plates 3 are formed in a substantially rectangular shape (rectangular shape) when viewed from above and below by a glass plate or a synthetic resin plate material having translucency such as acrylic resin or polycarbonate resin. . However, these two light guide plates 3 are formed in the same shape and the same dimensions. The two light guide plates 3 are held by the casing 1 with one of the two long sides being inserted into the two grooves 10 of the casing 1. (See FIGS. 1-5). The two light guide plates 3 are chamfered at both ends in the longitudinal direction (left and right direction) at the end portion held by the housing 1 and at the end portion on the side not held by the housing 1. Both ends in the longitudinal direction are rounded and rounded (see FIG. 1).

  As shown in FIG. 5, each of the plurality (two in this embodiment) of LED modules 2 is mounted on a substrate 22 formed in a long rectangular plate shape and a surface (mounting surface) of the substrate 22. And a plurality of solid state light emitting devices (LEDs). However, the LED is a white LED (hereinafter referred to as a first LED) 20 that emits first light (for example, white light) and a light bulb color LED (hereinafter, first light) that emits second light (for example, light bulb color light). 2) 21). That is, each LED module 2 is arranged such that one or more first LEDs 20 and one or more second LEDs 21 are arranged in a line along the longitudinal direction (left-right direction) of the substrate 22. It is mounted on 22 mounting surfaces. Here, on the mounting surface of the substrate 22, one or a plurality of first LEDs 20 (hereinafter referred to as a first LED group) that are adjacent to each other in a row, and one or the same that are adjacent to each other in a row, or A plurality of second LEDs 21 (hereinafter referred to as a second LED group) are alternately arranged. Although not shown, the mounting surface of the substrate 22 includes wiring (conductor) for electrically connecting the first LEDs 20 included in the plurality of first LED groups, and included in the plurality of second LED groups. Wirings (conductors) for electrically connecting the second LEDs 21 are formed. In addition, it is preferable that the board | substrate 22 has a conductor (copper foil) formed in the whole back surface on the opposite side to a mounting surface. Furthermore, on one end side in the longitudinal direction of the mounting surface of the substrate 22, a receptacle connector (not shown) electrically connected to the wiring (conductor) of the first LED group, and the wiring (conductor) of the second LED group, An electrically connected receptacle connector (not shown) is mounted.

  As shown in FIG. 5, one LED module 2 is disposed at one end (rear end) along the longitudinal direction of the housing 1, and the mounting surface of the substrate 22 faces the incident surface 32 of the rear light guide plate 3. It is accommodated in the housing 1 as described above. The other LED module 2 is disposed at the other end (front end) along the longitudinal direction of the casing 1, and the casing 22 is mounted so that the mounting surface of the substrate 22 faces the incident surface 32 of the front light guide plate 3. 1 is accommodated. That is, white light (first light) emitted from the plurality of first LEDs 20 mounted on the mounting surface of the substrate 22 is along the longitudinal direction at the end of the light guide plate 3 held by the housing 1. The light enters the light guide plate 3 from the end surface (incident surface 32). Similarly, light bulb colored light (second light) emitted from the plurality of second LEDs 21 mounted on the mounting surface of the substrate 22 enters the light guide plate 3 from the incident surface 32. In addition, in the inside of the housing | casing 1, it is preferable that the back surface of the board | substrate 22 of two LED modules 2 is thermally couple | bonded with the housing | casing 1, and the heat | fever emitted from the LED module 2 is conducted to the housing | casing 1, and is thermally radiated. . In this case, it is preferable that the housing 1 is formed of a metal (for example, aluminum or aluminum alloy) that is a good conductor of heat.

  By the way, the two LED modules 2 are supplied with power from a power supply device (not shown) to emit light (light on). The power supply device includes, for example, a power conversion circuit that converts AC power supplied from the power system into DC power, a first power supply circuit that supplies DC power to the first LED group, and a second power source that supplies DC power to the second LED group It is preferable to provide a circuit or the like. The power conversion circuit is preferably configured of, for example, a boost chopper circuit (power factor correction circuit). The first power supply circuit and the second power supply circuit are preferably configured by a step-down chopper circuit (DC / DC converter) that steps down the high-voltage DC power output from the power conversion circuit. The output ends of the first power supply circuit and the second power supply circuit are electrically connected to the wiring (conductor) of the LED module 2 through a pair of electric wires and a plug connector provided at the tip of the pair of electric wires, respectively. It is preferable. That is, the plug connector of the electric wire connected to the output end of the first power supply circuit and the receptacle connector connected to the first LED group of the LED module 2 are connected. Similarly, the plug connector of the electric wire connected to the output end of the second power supply circuit and the receptacle connector connected to the second LED group of the LED module 2 are connected.

  Furthermore, the power supply device preferably includes a control circuit. The control circuit is configured to turn on / off and adjust the output of the first power supply circuit and the second power supply circuit in accordance with a control signal transmitted by wired communication or wireless communication from an external controller (not shown). It is preferable. The power conversion circuit, the first power supply circuit, the second power supply circuit, the control circuit, and the like are configured by mounting various circuit components on a printed wiring board. The power supply device is configured by housing a power conversion circuit, a first power supply circuit, a second power supply circuit, a control circuit, and the like in a case made of metal or synthetic resin (not shown). The power supply device is preferably accommodated in the housing 1. However, the power supply device may not be accommodated in the housing 1. When the power supply device is not accommodated in the housing 1, for example, it is preferable that the power supply device is installed behind the ceiling. Further, when the power supply device is housed in the housing 1, it is preferable that the power supply line wired on the back of the ceiling is drawn into the housing 1 through the inside of the column 100, for example.

  The first LED 20 and the second LED 21 of the LED module 2 emit light (light up) with DC power supplied from the power supply device. The first light emitted from the first LED 20 and the second light emitted from the second LED 21 enter the light guide plate 3 from the incident surface 32 and are guided, and the upper surface, the lower surface, and the side surfaces of the light guide plate 3. Emanates from. In the following description, the surface (lower surface) facing downward of the two surfaces facing the thickness direction of the light guide plate 3 is referred to as a first surface 30, and the surface (upper surface) facing upward is the first surface 30. Two surfaces 31 are called. Further, of the side surfaces along the thickness direction of the light guide plate 3, the side surface excluding the incident surface 32 is referred to as an emission end surface 33 (see FIGS. 1 to 3).

  Here, a first light distribution controller 34 and a second light distribution controller 35 are formed on the first surface 30 and the second surface 31 of the light guide plate 3 (see FIGS. 1 to 5). The first light distribution control unit 34 has a large number of first prisms 340. The second light distribution control unit 35 also has a large number of second prisms 350. As shown in the projection view of FIG. 6A, the first prism 340 and the second prism 350 are formed as recesses formed by side surfaces of a quadrangular pyramid (a surface excluding a rectangular bottom surface). The first light distribution control unit 34 is arranged in approximately one row with the first LEDs 20 when viewed from the thickness direction (vertical direction) of the light guide plate 3, and one of the four triangular surfaces is defined as the first LED 20. A large number of first prisms 340 are arranged in a facing direction (see FIG. 5). On the other hand, when viewed from the thickness direction of the light guide plate 3, the second light distribution control unit 35 is linearly aligned with the second LED 21, and the direction in which two of the four triangular surfaces face the second LED 21. A large number of second prisms 350 are arranged side by side (see FIG. 5). In addition, the 1st light distribution control part 34 and the 2nd light distribution control part 35 are formed in the surface (the 1st surface 30 and the 2nd surface 31) of the light-guide plate 3, or are formed by resin molding. It is preferred that However, the first prism 340 and the second prism 350 are not limited to a quadrangular pyramid shape. For example, the conical recess shown in the projection view of FIG. 6B or the semi-ellipsoidal recess shown in the projection view of FIG. 6C. The recess having an oblique cone shape shown in the projection view of FIG. 7A or the recess having a triangular prism shape shown in the projection view of FIG. 7B may be used. Furthermore, the first light distribution control unit 34 and the second light distribution control unit 35 may be provided only on either the first surface 30 or the second surface 31 of the light guide plate 3. Further, the first prism 340 and the second prism 350 may be formed so as to protrude from the surface of the light guide plate 3 (the first surface 30 and the second surface 31).

  Here, when the first light incident from the incident surface 32 of the light guide plate 3 is emitted from the first surface 30 and the second surface 31 of the light guide plate 3, the first light distribution control unit 34 and the second light distribution control. The light distribution is controlled by the unit 35, but the light distribution is mainly controlled by the first light distribution control unit 34. On the other hand, when the second light incident from the incident surface 32 of the light guide plate 3 is emitted from the first surface 30 and the second surface 31 of the light guide plate 3, the first light distribution control unit 34 and the second light distribution control unit. The light distribution is controlled by 35, but the light distribution is mainly controlled by the second light distribution control unit 35. The light distribution characteristics of the luminaire X include the first LED 20, the second LED 21, the arrangement of the first light distribution control unit 34 and the second light distribution control unit 35, the shapes of the first prism 340 and the second prism 350, and the first prism. 340 and the orientation of the second prism 350. For example, in the LED module 2, the second LED group is mounted on both ends of the substrate 22 in the longitudinal direction, and the first LED group is mounted on the center of the substrate 22 in the longitudinal direction. And the 2nd light distribution control part 35 is provided in the both ends of the light guide plate 3 along the longitudinal direction of the housing | casing 1, and the 1st light distribution control part 34 in the center of the light guide plate 3 along the longitudinal direction of the housing | casing 1 is provided. Is provided. In this case, as shown in FIG. 8A, on the first surface 30 of the light guide plate 3, the first light is mainly emitted from the first region Y1 at the center, and the second light is emitted from the second regions Y2 at both ends. The first light and the second light are emitted from the third region Y3 emitted and sandwiched between the first region Y1 and the second region Y2.

  Further, the light distribution characteristics of the first light emitted from the first surface 30, the second surface 31, and the emission end face 33 of the light guide plate 3 are represented by Z11, Z12, and Z13, respectively (see FIG. 8B). Similarly, the light distribution characteristics of the second light emitted from the first surface 30, the second surface 31, and the emission end face 33 of the light guide plate 3 are represented by Z21, Z22, and Z23, respectively (see FIG. 8C). The two light distribution characteristics Z12 and Z13 of the first light and the two light distribution characteristics Z22 and Z23 of the second light are substantially the same. On the other hand, the downward light distribution characteristic Z11 of the first light is smaller in the horizontal direction and larger in the downward direction than the downward light distribution characteristic Z21 of the second light. That is, the first light (white light) having a relatively high color temperature is irradiated directly below the light guide plate 3, and the second light (bulb color light) having a relatively low color temperature is irradiated below the light guide plate 3. Irradiating around. The light distribution characteristic of the first light and the light distribution characteristic of the second light are realized by the first light distribution control unit 34 and the second light distribution control unit 35 provided in the light guide plate 3. ing.

  As described above, the lighting fixture X includes the first light source (first LED 20) that emits the first light and the second light source (second LED 21) that emits the second light having a light color different from that of the first light. I have. The lighting fixture X includes one or a plurality of light guide plates 3 that are translucent and formed in a plate shape, and a housing 1 that supports the first LED 20, the second LED 21, and the light guide plate 3. Yes. The housing 1 supports at least one end surface (incident surface 32) of the plurality of end surfaces along the thickness direction (vertical direction) of the light guide plate 3 and the first LED 20 and the second LED 21 facing each other. The light guide plate 3 is configured to guide the first light and the second light incident from the incident surface 32. And the light-guide plate 3 is comprised so that 1st light and 2nd light may be radiate | emitted from the end surface (emergence end surface 33) which does not oppose 1st LED20 and 2nd LED21 among several end surfaces. And the light-guide plate 3 is comprised so that 1st light and 2nd light may be radiate | emitted from at least any one surface of the 1st surface 30 and the 2nd surface 31 which opposes along a thickness direction. ing. Further, the light guide plate 3 includes a first light distribution control unit 34 and a second light distribution control unit 35 on the surface of the first surface 30 and the second surface 31 that emits the first light and the second light. Each is provided with one or more. The first light distribution control unit 34 is mainly configured to control the light distribution of the first light. The second light distribution control unit 35 is mainly configured to control the light distribution of the second light.

  If the lighting fixture X is configured as described above, the light distribution of the first light emitted from the first surface 30 and the second surface 31 of the light guide plate 3 is mainly controlled by the first light distribution control unit 34, The light distribution of the second light can be controlled mainly by the second light distribution control unit 35. That is, the luminaire X can separately control the light distribution of a plurality of kinds of colors of the first light and the second light. For example, the lighting fixture X illuminates the floor with the first light having a high color temperature emitted from the first LED 20 of the LED module 2 and the second light having a low color temperature emitted from the second LED 21 of the same LED module 2. Can illuminate walls and ceilings. Therefore, the lighting fixture X is compared with the case where the LED module and the light guide plate for illuminating the floor with the first light and the LED module and the light guide plate for illuminating the wall and ceiling with the second light are provided. Thus, the size can be reduced and the manufacturing cost can be reduced by simplifying the configuration.

  Further, in the lighting fixture X, the housing 1 supports each end face (incident surface 32) of the plurality of light guide plates 3, and the first light source (first LED 20) and the second light source (second LED 21) facing each other. It is preferable.

  If the lighting fixture X is comprised as mentioned above, the light (1st light and 2nd light) radiated | emitted from 1st LED20 and 2nd LED21 can be efficiently entered into the light-guide plate 3. FIG.

  Furthermore, in the lighting fixture X, it is preferable that the first light distribution control unit 34 and the second light distribution control unit 35 each include a plurality of prisms. The first prism 340 included in the first light distribution controller 34 and the second prism 350 included in the second light distribution controller 35 are preferably formed in the same shape.

  If the lighting fixture X is configured as described above, the first light distribution control unit 34 and the second light distribution are arranged with respect to the light guide plate 3 as compared with the case where the shapes of the first prism 340 and the second prism 350 are different from each other. The light control unit 35 can be easily formed.

(Embodiment 2)
The lighting fixture XX (hereinafter abbreviated as lighting fixture XX) according to Embodiment 2 of the present invention will be described in detail with reference to FIGS. The lighting fixture XX includes a housing 4, a plurality of LED modules 5, three light guide plates 6, and a power supply unit 7. However, in the following description, unless otherwise specified, the vertical and horizontal directions and the front and rear directions are defined in FIG.

  The LED module 5 includes a first LED module 5A and a second LED module 5B (see FIG. 10). As shown in FIG. 12A, the first LED module 5A includes a substrate 52 formed in a long rectangular plate shape, and a plurality of LEDs (first LEDs 50) mounted on the surface (mounting surface) of the substrate 52. It consists of and. The first LED 50 is a white LED that emits white light (first light). As shown in FIG. 12B, the second LED module 5B includes a substrate 52, a plurality of first LEDs 50, and a plurality of second LEDs 51. The second LED 51 is a light bulb color LED that emits light bulb color light (second light). In the second LED module 5B, the first LEDs 50 and the second LEDs 51 are mounted on the mounting surface of the substrate 52 alternately and in a line. Although not shown, electrical wiring is formed on the mounting surface of each substrate 52 by a conductor (copper foil). The conductor electrically connects a receptacle connector (not shown) mounted on the mounting surface of the substrate 52 with the first LED 50 and the second LED 51.

  As shown in FIG. 10, the housing 4 includes a body 40 and a cover 41. The body 40 has a substantially triangular body-side main body 400 as viewed from above and below, and three body-side arm portions that protrude from the vicinity of the three apexes of the body-side main body 400 in directions away from the body-side main body 400, respectively. 401 (see FIGS. 10 and 11).

  The body-side body 400 includes a roughly triangular bottom plate 4000, a rectangular plate-like side plate 4001 that rises upward along three sides of the bottom plate 4000, and a truncated cone-shaped column that protrudes upward from the center of the bottom plate 4000. 4002. The three first LED modules 5A are housed in the body-side main body 400 with the mounting surface facing outward and the first LED 50 positioned above the upper end of the side plate 4001 (see FIG. 10). ).

  The three body side arm portions 401 are a rectangular plate-shaped bottom plate 4010, a pair of first side plates 4011 that rise upward from both ends along the longitudinal direction of the bottom plate 4010, and diagonally from the tip along the short direction of the bottom plate 4010. And a second side plate 4012 that rises upward. The pair of first side plates 4011 are formed at the same height as the side plate 4001 of the body-side main body 400 except for the tip portion, and the tip portions are formed slightly higher than the side plate 4001 (see FIG. 10). ). And two 2nd LED modules 5B are accommodated in each of the three body side arm portions 401. Each of the two second LED modules 5B has a mounting surface facing outward, and the first LED 50 and the second LED 51 are positioned above the upper end of the first side plate 4011 (excluding the tip portion), and the body side It is accommodated in the arm 401 (see FIG. 10).

  The cover 41 includes a cover-side main body 410 and three cover-side arms 411 (see FIG. 10). The cover-side main body 410 is formed in a shape in which three sides of the triangle are arcuate when viewed from the vertical direction. The three cover side arm portions 411 are formed in a rectangular shape in which two adjacent sides are extended in parallel when viewed in the vertical direction.

  The cover-side main body 410 has a bottom wall 4100 and side walls 4101 that protrude obliquely downward from the periphery of the bottom wall 4100. A circular through hole 4102 is formed in the center of the bottom wall 4100 (see FIG. 10).

  The three cover side arm portions 411 include a bottom wall 4110 connected to the bottom wall 4100 of the cover side main body portion 410, a pair of first side walls 4111 connected to the side wall 4101 of the cover side main body portion 410, and a pair of first side walls. 4111 and a second side wall 4112 connecting the tips of 4111. Note that the bottom wall 4110 is provided with a rectangular vent hole 4113 as viewed from above and below (see FIG. 10).

  The housing 4 is assembled by housing the first LED module 5A and the second LED module 5B inside and covering the body 40 with the cover 41 in a state of supporting the three light guide plates 6. (See FIGS. 9 to 11). In addition, it is preferable that the body 40 and the cover 41 are couple | bonded by appropriate methods, such as adhesion | attachment and screwing.

  The power supply unit 7 includes a power supply device (not shown) and a disk-shaped case 70 that houses the power supply device (see FIGS. 9 and 10). The power supply device includes a power conversion circuit, a first power supply circuit, a second power supply circuit, a control circuit, and the like, similar to the power supply device in the first embodiment. The power conversion circuit, the first power supply circuit, the second power supply circuit, the control circuit, and the like are preferably configured by mounting various circuit components on an annular or semi-annular printed wiring board.

  The case 70 includes a lower case 71 that is formed in a round dish shape and an upper case 72 that is also formed in a round dish shape (see FIG. 10). The lower case 71 has a circular through hole 710 formed at the center of the bottom surface. The lower case 71 has an appropriate method such as screwing on the upper surface of the casing 4 (the cover 41) so that the through-hole 710 overlaps the through-hole 4102 provided in the casing 4 (the cover 41). It is preferable to fix with. Moreover, it is preferable that the upper case 72 is put on the lower case 71 and is coupled to the lower case 71 by an appropriate method such as adhesion or screwing. The printed wiring board of the power supply device is preferably disposed around the through hole 710 in the lower case 71 and fixed to the lower case 71 by an appropriate method such as screwing. Although not shown in FIG. 10, the upper case 72 is preferably formed with an insertion hole through which the support column 100 is inserted in the vicinity of the center. The power supply unit 7 and the housing 4 are attached to the support 100 by screwing the support 100 inserted through the insertion hole into the case 70 or the housing 4 (see FIG. 9). In addition, it is preferable that the feeder of the electric power system wired on the back of the ceiling is drawn into the case 70 through the inside of the support column 100, for example. Alternatively, the power supply unit 7 may include a pair of hooking blades that are detachably and mechanically connected to a hooking ceiling disposed on the ceiling. In this case, the power supply unit 7 and the hooking ceiling are electrically and mechanically connected by engaging the pair of hooking blades with the hook receiving blade receiving portion of the hooking ceiling.

  The three light guide plates 6 are formed in a long octagonal shape by a glass plate or a synthetic resin plate material having translucency such as acrylic resin or polycarbonate resin. However, these three light guide plates 6 are formed in the same shape and the same dimensions. The three light guide plates 6 have three sides 60A and 60B arranged along the longitudinal direction in a narrow groove 42 formed on the side surface of the housing 4 (the surface where the body 40 and the cover 41 are coupled). , 60C are inserted and supported by the housing 4 (see FIGS. 10, 13A, 13B, and 14). The light guide plate 6 is opposed to the first LED 50 of the first LED module 5A at the side end surface including the central side 60A, and the second LED module 5B is disposed at two side end surfaces including the sides 60B and 60C at both ends. It faces the first LED 50 and the second LED 51 (see FIG. 14). That is, in the light guide plate 6, the first light of the first LED module 5A is incident from the side end surface (incident surface) including the central side 60A, and the first light and the second light of the second LED module 5B. Is incident from the side end face (incident surface) including the sides 60B and 60C at both ends.

  The first LED 50 and the second LED 51 of the first and second LED modules 5 </ b> A and 5 </ b> B emit light (light up) with DC power supplied from the power supply unit 7. The first light emitted from the first LED 50 and the second light emitted from the second LED 51 are incident on the light guide plate 6 from the three incident surfaces and guided, and the upper surface, the lower surface, Emits from the side. In the following description, of the two surfaces facing the thickness direction of the light guide plate 6, the surface (lower surface) facing downward is referred to as the first surface 61, and the surface (upper surface) facing upward is the first surface 61. Two surfaces 62 are called. Furthermore, among the side surfaces along the thickness direction of the light guide plate 6, five side surfaces (side surfaces exposed to the outside of the housing 4) excluding the incident surface are referred to as emission end surfaces 63 (see FIGS. 10, 13A, and 13B).

  Here, a first light distribution control unit 64 and a second light distribution control unit 65 are formed on the first surface 61 of the light guide plate 6 (see FIGS. 9 to 11 and 14). The first light distribution control unit 64 has a large number of first prisms 640. The second light distribution control unit 65 also has a large number of second prisms 650. For example, the first prism 640 and the second prism 650 are formed of quadrangular pyramid-shaped recesses, similarly to the first prism 340 and the second prism 350 in the lighting fixture X according to the first embodiment.

  The first light distribution control unit 64 is arranged in a direction substantially orthogonal to the central side 60A of the light guide plate 6 when viewed from the thickness direction of the light guide plate 6, and one of the four triangular surfaces is arranged. A large number of first prisms 640 are arranged in a direction facing the central side 60A (see FIG. 14). On the other hand, when viewed from the thickness direction of the light guide plate 6, the second light distribution control unit 65 is arranged in a direction substantially orthogonal to the sides 60B and 60C at both ends, and two of the four triangular surfaces are arranged. A number of second prisms 650 are arranged side by side so as to face the sides 60B and 60C. The first light distribution control unit 64 and the second light distribution control unit 65 are preferably formed by laser processing on the surface (first surface 61) of the light guide plate 6 or by resin molding. . However, the first prism 640 and the second prism 650 are not limited to a quadrangular pyramid-shaped recess, for example, a conical recess, a semi-ellipsoidal recess, an oblique conical recess, or a triangular prism-shaped recess. It may be a place. Furthermore, the first light distribution control unit 64 and the second light distribution control unit 65 may be provided on both the first surface 61 and the second surface 62 of the light guide plate 6. Further, the first prism 640 and the second prism 650 may be formed so as to protrude from the surface of the light guide plate 6 (the first surface 61 and the second surface 62).

  Here, the first light incident on the light guide plate 6 from the first LED module 5 </ b> A is mainly distributed by the first light distribution control unit 64 when exiting from the first surface 61 and the second surface 62 of the light guide plate 6. Light is controlled. On the other hand, when the first light and the second light incident on the light guide plate 6 from the second LED module 5B are emitted from the first surface 61 and the second surface 62 of the light guide plate 6, the second light distribution control is mainly performed. The light distribution is controlled by the unit 65. The light distribution characteristics of the lighting fixture XX are the first LED 50, the second LED 51, the arrangement of the first light distribution control unit 64 and the second light distribution control unit 65, the shapes of the first prism 640 and the second prism 650, the first prism. 640 and the orientation of the second prism 650. For example, when power is supplied from the power supply unit 7 to the first LED 50 and power is not supplied to the second LED 51, only the first light (white light) is emitted from the entire three light guide plates 6. Further, when power is not supplied from the power supply unit 7 to the first LED 50 and power is supplied to the second LED 51, only the second light (bulb color light) is emitted from the entire three light guide plates 6. Furthermore, when all the LED modules (the first LED 50 and the second LED 51) are fed from the power supply unit 7, both the first light (white light) and the second light (bulb color) are emitted from the entire three light guide plates 6. Both are emitted and mixed in color. However, the light distribution characteristics by the first light distribution control unit 64 and the second light distribution control unit 65 may be the same as or different from the light distribution characteristics Z11 to Z13 and Z21 to Z23 of the lighting fixture X according to the first embodiment. Also good.

  As described above, in the lighting fixture XX, it is preferable that the light guide plate 6 is formed in an approximately multi-sided shape (octagonal shape) when viewed from the thickness direction (vertical direction). The housing 4 supports a plurality of end surfaces including a plurality of adjacent sides 60A, 60B, 60C of the light guide plate 6, and a first light source (first LED 50) and a second light source (second LED 51) facing each other. It is preferable.

  If the lighting fixture XX is comprised as mentioned above, the light (1st light and 2nd light) radiated | emitted from 1st LED50 and 2nd LED51 can be efficiently entered into the light-guide plate 6. FIG.

  Further, in the lighting fixture XX, the housing 4 supports the three or more light guide plates 6 side by side in the circumferential direction, and accommodates the first LED 50 and the second LED 51 in a region surrounded by the three or more light guide plates 6. It is preferable.

  If the lighting fixture XX is configured as described above, the dead space of the housing 4 can be eliminated and the housing 4 can be downsized.

  Furthermore, it is preferable that the lighting fixture XX includes a power supply unit (power supply unit 7) for supplying power to the first LED 50 and the second LED 51. The housing 4 preferably supports three or more light guide plates 6 arranged in the circumferential direction, and the power supply unit 7 is disposed in a region surrounded by the three or more light guide plates 6.

  If the lighting fixture XX is configured as described above, an increase in size can be suppressed while the power supply unit (power supply unit 7) is provided.

  Note that the lighting fixture X according to the first embodiment and the lighting fixture XX according to the second embodiment include an LED (third light source) that emits light of a light color different from the first light and the second light, and mainly the third light. You may provide the 3rd light distribution control part which controls the light distribution of a light source. In this case, the first light source (first LED), the second light source (second LED), and the third light source (third LED) may be red LEDs, blue LEDs, and green LEDs. Furthermore, there may be four or more types of light sources having different emission colors.

X, XX Lighting fixtures 1, 4 Housing 3, 6 Light guide plate 7 Power supply unit (feeding unit)
20, 50 1st LED (1st light source)
21, 51 Second LED (second light source)
30, 61 First surface 31, 62 Second surface 32 Incident surface (end surface)
33 Output end face 34, 64 First light distribution control unit 35, 65 Second light distribution control unit 340, 640 First prism 350, 650 Second prism

Claims (6)

A first light source that emits first light, a second light source that emits second light having a light color different from that of the first light, and a light-transmitting plate-shaped one Or a plurality of light guide plates, and a housing that supports the first light source, the second light source, and the light guide plate,
The housing supports the first light source and the second light source in opposition to at least one end surface of a plurality of end surfaces along the thickness direction of the light guide plate,
The light guide plate guides the first light and the second light incident from the end surface, and of the plurality of end surfaces, the end surface does not face the first light source and the second light source, The first light and the second light are emitted from at least one of the first surface and the second surface that face each other along the thickness direction,
Furthermore, the light guide plate has a first light distribution control unit and a second light distribution control unit on a surface of the first surface and the second surface that emits the first light and the second light, respectively. One or more provided,
The first light distribution control unit is mainly configured to control the light distribution of the first light,
The second light distribution control unit is configured to mainly control light distribution of the second light. The light guide plate is formed in a roughly multi-sided shape when viewed from the thickness direction,
The said housing | casing is supporting the said 1st light source and the said 2nd light source so that the said some end surface containing the several side which the said light-guide plate adjoins opposes. lighting equipment.   The lighting device according to claim 1, wherein the housing supports the end surfaces of the light guide plates, the first light source, and the second light source so as to face each other.   The housing supports the three or more light guide plates side by side in the circumferential direction, and accommodates the first light source and the second light source in a region surrounded by the three or more light guide plates. The lighting fixture according to claim 3. A power supply unit for supplying power to the first light source and the second light source;
The housing includes three or more light guide plates arranged side by side in the circumferential direction, and the power feeding unit is disposed in a region surrounded by the three or more light guide plates. Item 5. A lighting apparatus according to item 3 or 4.   Each of the first light distribution control unit and the second light distribution control unit includes a plurality of prisms, and the first prism included in the first light distribution control unit and the second light distribution control unit include The lighting fixture according to claim 1, wherein the second prism is formed in the same shape.

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