JP2018113227A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire which can effectively suppress spread of light while securing direct illumination.SOLUTION: A luminaire 10 comprises a lamp body 20, a lens 65, and a light-shielding cylinder 66. The lamp body 20 includes: a luminaire body 23; a light-emitting module 24 disposed on the luminaire body 23; a reflector 25 having an emission opening 46 for emitting light from the light-emitting module 24; and a translucent cover 26 disposed at an emission opening 46 side of the reflector 25. The lens 65 condenses the light transmitted through the translucent cover 26. The light-shielding cylinder 66 is provided so as to have a cylindrical shape having a diameter smaller than that of the emission opening 46 of the reflector 25, both ends opened, one end facing the light-emitting module 24 through the translucent cover 26, and the other end facing the lens 65.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a lighting device using a light emitting module.

  2. Description of the Related Art Conventionally, lighting devices installed at high places such as the ceiling of a theater are required to suppress the spread of light and improve the illuminance directly below.

  In order to suppress the spread of light, it is conceivable to cover the outer periphery of the light emitting side of the illumination device with a light shielding plate to shield the spread light.

  However, in the light shielding plate that covers the outer periphery of the light emitting side of the lighting device, the spread of light cannot be effectively suppressed, and the illuminance directly below may be easily reduced.

JP-A-2015-228318

  The problem to be solved by the present invention is to provide an illuminating device capable of effectively suppressing the spread of light while ensuring the illuminance directly below.

  The illumination device according to the embodiment includes a lamp, a lens, and a light-shielding tube. The lamp body includes an instrument body, a light emitting module disposed in the instrument body, a reflector having an exit opening for emitting light from the light emitting module, and a translucent cover disposed on the exit opening side of the reflector. Have The lens collects the light transmitted through the translucent cover. The light-shielding cylinder is provided in a cylindrical shape having a smaller diameter than the exit opening of the reflector and having both ends opened. One end is opposed to the light emitting module through the translucent cover and the other end is opposed to the lens.

  According to the present invention, it can be expected to effectively suppress the spread of light while securing the illuminance directly below.

It is sectional drawing of the illuminating device which shows one Embodiment. It is the perspective view seen from the decomposition | disassembly state of the illuminating device same as the above. It is the perspective view seen from the upper direction of the decomposition | disassembly state of an illuminating device same as the above. It is the perspective view which looked at the same illuminating device from the downward direction. It is a front view of the light emitting module of an illuminating device same as the above.

  Hereinafter, an embodiment will be described with reference to FIGS. 1 to 5.

  As shown in FIG. 4, the lighting device 10 is a downlight that is embedded and installed in an installation hole provided in a ceiling plate of a theater, for example. The lighting device 10 includes an appliance unit 11, an installation unit 12 that installs the appliance unit 11 on a ceiling structure, and a power supply unit (not shown) that supplies lighting power to the appliance unit 11.

  As shown in FIGS. 1 to 5, the fixture unit 11 includes a lamp body 20 and a light control unit 21 that is detachably attached to the lamp body 20.

  The lamp body 20 includes a fixture body 23, and includes a light emitting module 24, a reflector 25, a translucent cover 26, an outer reflector 27, and the like disposed on the lower surface side of the fixture body 23, respectively.

  The instrument main body 23 is made of metal such as aluminum die casting. A cylindrical protrusion 29 protrudes from the lower surface side of the instrument body 23, and a recess 30 that opens downward is formed inside the protrusion 29. A light emitting module 24 is attached to the lower surface of the instrument body 23 facing the recess 30. In addition, a plurality of attachment portions 31 for attaching the outer reflector 27 are provided on the upper side of the instrument main body 23. These attachment portions 31 are disposed at two positions that are symmetrical with respect to the central axis of the instrument body 23, and project sideways from the side surface of the instrument body 23 so as to face downward. Further, a plurality of radiating fins 32 project from the outer peripheral surface of the protrusion 29 and the upper surface side of the instrument body 23.

  Further, as shown in FIG. 5, the light emitting module 24 includes a substrate 34 and a light emitting unit 35 formed on the surface of the substrate 34.

  The substrate 34 is formed in a quadrangular shape. The substrate 34 is made of an insulating material or a metal material. The insulating material is, for example, ceramics. In the case of a metal material, the surface is covered with a white insulating material. On the surface of the substrate 34, two types of wiring patterns of a high color temperature wiring pattern and a low color temperature wiring pattern are formed. A pair of high color temperature connectors 36 and a pair of low color temperature connectors 37 that are electrically connected to the respective wiring patterns are mounted on the surface of the substrate 34 at positions away from the light emitting portion 35. .

  The light emitting part 35 has a quadrangular shape, preferably a square shape. The light emitting unit 35 includes a plurality of high color temperature light emitting units 38 and a plurality of low color temperature light emitting units 39 that emit light having different color temperatures. The high color temperature light emitting units 38 and the low color temperature light emitting units 39 are alternately arranged along the first direction A extending from one side of the light emitting unit 35 to the opposite side. The high color temperature light emitting section 38 is composed of 3 rows, and the low color temperature light emitting section 39 is composed of 2 rows, for a total of 5 rows. The high color temperature light emitting units 38 are arranged at the center of the first direction A and at both ends of the first direction A, respectively, and the low color temperature light emitting units 39 are arranged between the three rows of high color temperature light emitting units 38, respectively. Yes.

  On the surface of the substrate 34, a wall portion 40 is formed so as to protrude from the periphery of the light emitting portion 35 and between the light emitting portions 38 and 39. The wall 40 is made of, for example, a silicone resin. The wall portion 40 is arranged so as to surround the area of each light emitting portion 38, 39, and each light emitting portion 38, 39 is individually partitioned by the wall portion 40.

  The high color temperature light emitting unit 38 and the low color temperature light emitting unit 39 include a plurality of light emitting elements 41 mounted on the substrate 34. The light emitting element 41 is an LED chip. Further, the high color temperature light emitting unit 38 and the low color temperature light emitting unit 39 respectively include a high color temperature phosphor layer 42 and a low color temperature phosphor layer 43 that cover the plurality of light emitting elements 41, respectively.

  The light emitting element 41 includes a first direction A and a second direction B orthogonal to the first direction A in each region of the high color temperature light emitting unit 38 and the low color temperature light emitting unit 39 on the substrate 34. A plurality of columns are mounted in a matrix. A high color temperature wiring pattern and a low color temperature wiring pattern are formed in each region of the high color temperature light emitting section 38 and the low color temperature light emitting section 39, and the light emitting element 41 is connected to each wiring pattern in series or directly. They are electrically connected in parallel. Therefore, the light emitting module 24 can supply power to the light emitting element 41 of the high color temperature light emitting unit 38 through the high color temperature connector 36 and the wiring pattern for high color temperature, and can reduce power to the light emitting element 41 of the low color temperature light emitting unit 39. Power can be supplied through the color temperature connector 37 and the low color temperature wiring pattern.

  The high color temperature light emitting unit 38 uses a light emitting element 41 that emits blue light, and a high color temperature phosphor layer 42 that includes a yellow phosphor that absorbs blue light, converts it into yellow light, and emits it. White light is emitted as a mixed color of yellow and yellow light. Further, the low color temperature light emitting unit 39 is a light-emitting phosphor 41 that emits blue light, and a phosphor for light bulb color light emission such as a red phosphor that absorbs blue light, converts it into red light and emits it together with a yellow phosphor. Is used to emit light of a bulb color as a mixed color of blue light, yellow light, red light, and the like. The light color temperature of the high color temperature light emitting unit 38 is, for example, 3600K, and the light color temperature of the low color temperature light emitting unit 39 is, for example, 1800K.

  As shown in FIG. 1, in the light emitting module 24, the direction perpendicular to the center of the light emitting unit 35 is defined as the optical axis z, and this optical axis z coincides with the central axis of the fixture body 23 (lamp body 20). The instrument body 23 is disposed on the lower surface.

  Further, the reflector 25 is made of, for example, metal or resin. The reflector 25 is formed in a cylindrical shape that opens in the vertical direction and expands in diameter downward. In the upper part of the reflector 25, a circular incident opening 45 facing the light emitting part 35 is formed. A circular emission opening 46 is formed in the lower part of the reflector 25. The inner surface of the reflector 25 is a reflecting surface, and this reflecting surface is formed, for example, as a white completely diffusing surface. An annular flange 47 protruding outward is formed at the lower end of the reflector 25.

  The translucent cover 26 is formed in a disk shape with, for example, glass or resin having translucency and diffusibility. In this embodiment, diffusion glass is used.

  A packing 49 is attached to the periphery of the translucent cover 26. The flange 49 of the reflector 25 is also attached to the packing 49. The packing 49 integrally holds the reflector 25 and the translucent cover 26, and is fitted inside the protrusion 29 of the instrument body 23. Further, the packing 49 is sandwiched and held between the projection 29 of the instrument body 23 by an annular mounting member 51 screwed to the lower surface of the instrument body 23 via an annular presser plate 50. A light shielding edge 52 that is bent downward is formed in the periphery of the attachment member 51. Then, the reflector 25 attached to the instrument main body 23 by the packing 49 is positioned so as to have a predetermined positional relationship with the light emitting part 35 of the light emitting module 24 attached to the instrument main body 23.

  The outer reflector 27 is formed in a cylindrical shape that opens in the vertical direction and expands in diameter downward. Circular openings 54 and 55 are formed in the upper and lower portions of the outer reflector 27, respectively. The upper opening 54 is opposed to the light transmission region (the inner diameter side of the packing 49) of the light transmission cover 26. The inner surface of the outer reflector 27 is a reflecting surface, and this reflecting surface is formed, for example, as a white completely diffusing surface. An annular flange 56 protruding outward is formed at the lower end of the outer reflector 27.

  The flange 56 of the outer reflector 27 is attached to a decorative frame 58 that covers the periphery of the outer reflector 27. The decorative frame 58 is cylindrical and has a front frame portion 59 bent from the lower end to the inner diameter side. The flange 56 of the outer reflector 27 is disposed on the upper surface of the front frame portion 59, and the lower ends of the plurality of decorative frame pressers 60 inserted inside the decorative frame 58 are in contact with the upper surface of the flange 56 of the outer reflector 27. Has been. Each decorative frame presser 60 is fixed to the decorative frame 58 by a rivet 61 in a state where the flange 56 of the outer reflector 27 is sandwiched between the front frame portion 59 of the decorative frame 58 and each decorative frame presser 60. The upper end of the decorative frame presser 60 is screwed to the attachment portion 31 of the appliance body 23. Then, the outer reflector 27 and the decorative frame 58 attached to the appliance main body 23 are positioned so as to have a predetermined positional relationship with the light emitting part 35 of the light emitting module 24 attached to the appliance main body 23.

  Next, as shown in FIG. 1 to FIG. 3, the light control unit 21 includes a lens 65 disposed opposite to the light transmitting cover 26, and a light shielding tube disposed between the lens 65 and the light transmitting cover 26. 66, a frame body 67 that supports the lens 65 and the light shielding cylinder 66 and covers the periphery, and a support body 68 that supports the light shielding cylinder 66 on the frame body 67. FIG. 2 illustrates a state where the light passes through the lens 65.

  The lens 65 is formed in a disk shape having a larger diameter than the translucent cover 26. The lens 65 collects the light transmitted through the translucent cover 26 and emits the light incident from the upper surface side of the lens 65 from the lower surface side of the lens 65 so as to be parallel to the optical axis z. The focal length of the lens 65 is shorter than the distance between the lens 65 and the light emitting unit 35 of the light emitting module 24.

  Further, the light shielding cylinder 66 is formed in a cylindrical shape having both ends opened. That is, an incident opening 70 through which light transmitted through the translucent cover 26 enters is formed at the upper end, which is one end of the light shielding cylinder 66, and an emission opening 71 is formed at the lower end, which is the other end of the light shielding cylinder 66. The inner diameter of the light shielding tube 66 is smaller than the emission opening 46 of the reflector 25 and is larger than the width between both sides of the light emitting unit 35 of the light emitting module 24. The light shielding tube 66 is formed to have the same diameter from the upper entrance opening 70 to the lower exit opening 71, but may be formed in a tapered shape having a smaller diameter or a larger diameter from the upper end side toward the lower end side. Good.

  The light shielding tube 66 is supported by the frame 67 between the translucent cover 26 and the lens 65 so that the center axis of the light shielding tube 66 coincides with the optical axis z of the light emitting module 24. The upper end, which is one end of the light shielding cylinder 66, is disposed to face the light emitting portion 35 of the light emitting module 24 through the light transmitting cover 26 and is provided with a predetermined space between the light transmitting cover 26. The lower end, which is the other end, is also disposed with a predetermined space between the lens 65 and the lower end.

  The inner peripheral surface and the outer peripheral surface of the light shielding cylinder 66 are formed in either a black light absorption surface or a white complete diffusion surface, or in a color range between black and white. In addition, the lower end face of the light shielding tube 66 facing the lens 65 is preferably a white complete diffusing surface regardless of the colors of the inner and outer peripheral surfaces of the light shielding tube 66.

  In this embodiment, the lens 65 has a diameter of 145 mm, the light shielding tube 66 has a diameter (inner diameter) of 50 mm, and the light shielding tube 66 has an axial length of 60 mm.

  The frame body 67 is formed in a cylindrical shape and has an annular front frame portion 73 that is bent from the lower end toward the inner diameter side. An irradiation opening 74 is formed on the center side of the front frame portion 73. A peripheral portion of the lens 65 is disposed on the upper surface side of the front frame portion 73 via a packing 75. Inside the frame body 67, a plurality of lens pressers 76 that hold the peripheral portion of the lens 65 between the front frame portion 73 and the front frame portion 73 are attached by screwing. The upper side of the frame body 67 is arranged outside the decorative frame 58, and includes a screw 78 inserted from the outside to the inside of the frame body 67 and a nut 79 screwed to the screw 78. It is attached. Therefore, the light control unit 21 is detachably attached to the lamp body 20 side.

  Further, the support body 68 has a plurality of rods 81 that support the light shielding cylinder 66 inside the frame body 67. The rod 81 has a male screw portion 82 at one end and a female screw portion 83 at the other end. The male screw portion 82 penetrates the light shielding tube 66 from the outside to the inside, and a nut 84 is screwed to the distal end side of the male screw portion 82, whereby the rod 81 is fixed to the light shielding tube 66. The lot 81 is fixed to the frame 67 by screwing a screw 85 inserted from the outside of the frame 67 into the female thread portion 83 of the rod 81. In the present embodiment, four rods 81 are used and are arranged radially around the light shielding cylinder 66. The number of the rods 81 is not limited to four, and may be a plurality or one, and if at least two or more, the light shielding cylinder 66 can be stably supported.

  The lens 65 and the light shielding tube 66 of the light control unit 21 attached to the fixture body 23 are positioned so as to have a predetermined positional relationship with the light emitting portion 35 of the light emitting module 24 attached to the fixture body 23. . The light shielding tube 66 is positioned so that the central axis of the light shielding tube 66 coincides with the optical axis z of the light emitting module 24.

  Next, as shown in FIG. 4, the installation unit 12 includes a base frame 90 disposed in the installation hole of the ceiling plate, a support frame 91 that is mounted on the base frame 90 and supports the instrument unit 11, and the support frame. An installation unit 92 is provided at 91 and installed on the ceiling structure.

  A circular opening 93 is formed in the center of the base frame 90 so as to face the lower surface side of the instrument unit 11.

  The support frame 91 supports the fixture unit 11 so that the angle of the fixture unit 11 can be adjusted so that the optical axis z of the fixture unit 11 (light emitting module 24) is directed directly downward, even if the ceiling plate is inclined.

  Next, the operation of the illumination device 10 will be described.

  As shown in FIG. 1, when the lighting device 10 is turned on, the lighting unit 35 of the light emitting module 24 emits light by supplying lighting power from the power supply unit to the light emitting module 24. The light from the light emitting unit 35 enters the reflector 25, passes through the translucent cover 26, further enters the light control unit 21, passes through the lens 65, and exits to the illumination space.

  Of the light from the light emitting module 24 that passes through the translucent cover 26, light within a predetermined angle α centered on the optical axis z enters the light shielding tube 66 of the light control unit 21.

  Of the light entering the light shielding tube 66, light within a narrow angle β range close to the optical axis z does not enter the inner surface of the light shielding tube 66 but exits from the exit opening 71 of the light shielding tube 66 and directly enters the lens 65. Then, the lens 65 makes the direction parallel to the optical axis z (directly downward direction) and emits it to the illumination space.

  Of the light entering the light shielding tube 66, light in a wide angle range wider than the narrow angle β close to the optical axis z enters the inner surface of the light shielding tube 66 and does not directly enter the lens 65. At this time, if the light shielding cylinder 66 is a black light absorbing surface, the light incident on the light shielding cylinder 66 is easily absorbed, and if the light shielding cylinder 66 is a white completely diffusing surface, the light incident on the light shielding cylinder 66 is obtained. Is diffusely reflected, and a part of the diffusely reflected light passes through the lens 65.

  In this way, by spreading out the light that travels in the outward direction out of the light within the range of the predetermined angle α by the light shielding cylinder 66, the spread of the light emitted from the illumination device 10 can be suppressed.

  Moreover, of the light transmitted through the light-transmitting cover 26, the light within a predetermined angle α centered on the optical axis z, that is, the light entering the light shielding tube 66 is a predetermined angle centered on the optical axis z. The light is emitted from the illuminating device 10 by blocking the light, which is higher in intensity than the light traveling outward from the range of α, and traveling in the direction of spreading outside the range of the predetermined angle α by the light shielding cylinder 66. The spread of light can be effectively suppressed.

  Further, out of the light transmitted through the translucent cover 26, the light traveling outward from the predetermined angle α with the optical axis z as the center enters the lens 65 through the space between the light shielding tube 66 and the outer reflector 27, The lens 65 makes a direction parallel to the optical axis z (directly downward direction) and emits it into the illumination space. Thereby, even if the light emitted from the illumination device 10 is increased and the light shielding cylinder 66 is used, the brightness can be ensured.

  Thus, according to the illuminating device 10 of the present embodiment, by combining the lamp body 20 with the lens 65 and the light shielding tube 66, it is possible to effectively suppress the spread of light while ensuring the illuminance directly below.

  Further, the light control unit 21 having the lens 65, the light shielding tube 66, and the frame body 67 that supports the lens 65 and the light shielding tube 66 is configured, and the light control unit 21 can be attached to and detached from the lamp body 20 side. The presence or absence of the light unit 21 can be selected, and the light distribution characteristic according to the installation location of the lighting device 10 can be selected while using the same lamp body 20.

  Further, even when the light control unit 21 is used, the light distribution characteristic can be selected depending on the color type of the light shielding tube 66. For example, if it is desired to suppress the spread of light even when the light output of the illumination device 10 is lowered, a light shielding tube 66 having a black light collecting surface may be used. Further, when it is desired to secure the light output of the lighting device 10 while suppressing the spread of light, the light shielding tube 66 having a white complete reflection surface may be used.

  In addition, since the end surface of the translucent tube 66 facing the lens 65 is a white complete diffusing surface, when the lens 65 is viewed from the outside, a dark portion due to the light-shielding tube 66 hardly appears on the lens 65, and the appearance is kept good. be able to.

  In addition, the light emitting unit 35 of the light emitting module 24 includes a high color temperature light emitting unit 38 and a low color temperature light emitting unit 39, and the high color temperature light emitting unit 38 and the low color temperature light emitting unit 39 emit light at the same time. The single light emission of the temperature light emitting unit 38 and the single light emission of the low color temperature light emitting unit 39 are possible. In the case of simultaneous light emission by the high color temperature light emitting unit 38 and the low color temperature light emitting unit 39, it is preferable that the light of the high color temperature and the light of the low color temperature are mixed evenly.

  In the illuminating device 10 of the present embodiment, the light-transmitting cover 26 through which the light from the light emitting module 24 transmits has diffusibility, so that color unevenness can be suppressed. Further, since the focal length of the lens 65 is shorter than the distance between the lens 65 and the light emitting unit 35 of the light emitting module 24, it is possible to collect light while effectively suppressing the occurrence of color unevenness. . Then, the synergistic action of the translucent cover 26 and the lens 65 can effectively suppress the occurrence of color unevenness.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 Lighting equipment
20 lamp
21 Light control unit
23 Instrument body
24 light emitting module
25 Reflector
26 Translucent cover
35 Light emitter
46 Outgoing aperture
65 lenses
66 Shading tube
67 Frame

Claims (4)

An instrument body, a light emitting module disposed in the instrument body, a reflector having an exit opening for emitting light from the light emitting module, and a translucent cover disposed on the exit opening side of the reflector A lamp body having;
A lens that collects the light transmitted through the translucent cover;
A light-shielding cylinder provided in a cylindrical shape having a smaller diameter than the exit opening of the reflector and having both ends open, one end facing the light emitting module through the light-transmitting cover and the other end facing the lens;
A lighting device comprising: The light emitting module has a light emitting unit that emits light of different color temperatures,
The translucent cover has light diffusibility,
The lighting device according to claim 1, wherein the lens is disposed at a position where a distance from the light emitting module is shorter than a focal length of the lens. The lens, the light shielding tube, and a light control unit that has both ends opened and a frame that supports the lens and the light shielding tube on the inside, and is detachably attached to the lamp body side. The lighting device according to claim 1 or 2, characterized in that: The lighting device according to any one of claims 1 to 3, wherein an end face of the light shielding tube facing the lens is white.

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