WO2014024412A1 - 照明器具 - Google Patents

照明器具 Download PDF

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Publication number
WO2014024412A1
WO2014024412A1 PCT/JP2013/004570 JP2013004570W WO2014024412A1 WO 2014024412 A1 WO2014024412 A1 WO 2014024412A1 JP 2013004570 W JP2013004570 W JP 2013004570W WO 2014024412 A1 WO2014024412 A1 WO 2014024412A1
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WO
WIPO (PCT)
Prior art keywords
leds
led
lens
light
main beam
Prior art date
Application number
PCT/JP2013/004570
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
恭平 中村
関井　広行
哲也 西
岡田　敏純
Original Assignee
パナソニック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Priority to CN201390000605.XU priority Critical patent/CN204345445U/zh
Publication of WO2014024412A1 publication Critical patent/WO2014024412A1/ja

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/08—Refractors for light sources producing an asymmetric light distribution
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
    • G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0071—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source adapted to illuminate a complete hemisphere or a plane extending 360 degrees around the source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a lighting fixture.
  • Japanese Patent Publication No. 2003-86006 discloses a lighting device that can be mounted on a ceiling.
  • This lighting device includes a base plate formed in a disk shape, a power feeding unit and a lighting device are attached to a substantially central portion of the base plate, and a plurality of LEDs are arranged around the lighting device on one surface of the base plate. Are arranged in an annular shape.
  • a narrow-angle light distribution unit that condenses light emitted from the LEDs directly below and a wide-angle light distribution unit that diffuses light emitted from the LEDs are alternately arranged along the LED arrangement direction.
  • the light distribution control member disposed in the is rotatably provided.
  • the light distribution control member is rotated so that the narrow-angle light distribution unit faces each LED, so that the light emitted from the LED can be condensed directly below, and the wide-angle light distribution unit faces each LED. By doing so, the light emitted from the LED can be diffused to a wide angle.
  • the light emitted from the LED can be distributed at a wide angle
  • the light amount toward the center of the device where the lighting device is disposed is smaller than the light amount directly below
  • the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a lighting apparatus having an improved appearance by distributing light emitted from an LED over the entire surface of the diffusing member. There is.
  • the lighting fixture of the present invention is a fixture main body, a power supply portion arranged at the center of the fixture main body, a plurality of LEDs that are arranged in an annular shape around the power supply portion, and are lit by power supplied from the power supply portion, An optical member that is disposed in front of the plurality of LEDs and that controls light distribution of light emitted from the plurality of LEDs, and a diffusion member that is disposed in front of the optical member and diffuses light whose light distribution is controlled by the optical member Is provided.
  • the optical member includes a lens portion that is convex forward at a portion corresponding to a plurality of LEDs.
  • the lens portion is provided with a first convex portion that distributes light from the LED toward the center side of the diffusing member at an end portion on the power feeding portion side in a direction connecting each of the plurality of LEDs and the power feeding portion.
  • a second convex portion for distributing light from the LED toward the outer edge side of the diffusing member is provided at the end opposite to the power feeding portion in the direction connecting each of the plurality of LEDs and the power feeding portion.
  • the lens unit is configured such that the emission angle of the first main beam having the highest light intensity among the light emitted from the plurality of LEDs through the first convex portion is set to the same angle. It is preferable that the emission angles of the second main beam having the highest light intensity among the light emitted from the LED through the second convex portion are set to the same angle.
  • the lens unit for each of the plurality of LEDs, includes an emission angle of the first main beam having the highest light intensity among the light emitted from the LED through the first convex portion, and the LED. It is preferable that the emission angle of the second main beam having the highest light intensity out of the light emitted from the first through the second convex portion is set to the same angle with respect to the optical axis of the LED.
  • the plurality of LEDs are concentric with the first circle arranged on the circumference of the first circle whose radius is set to r1, and the radius is larger than r1.
  • a plurality of second LEDs arranged on the circumference of the second circle set to r2, and the lens unit includes a first lens unit provided at a portion corresponding to the first LED, And a second lens portion provided at a portion corresponding to the second LED, and the light intensity is the strongest among the light emitted from the first LED through the first convex portion of the first lens portion.
  • the angle formed by the optical axis of the first main beam and the first LED is ⁇ 1, and the first LED passes through the center of the first circle and the second circle from the intersection of the main beam of the first LED and the diffusing member.
  • L1 is the distance to the first line parallel to the optical axis of the second LED, and the first convex portion of the second lens portion from the second LED.
  • the angle formed by the first main beam having the highest light intensity and the optical axis of the second LED is ⁇ 2, and the first main beam of the second LED and the diffusing member are the first from the intersection point.
  • the first lens unit and the second lens unit are angled ⁇ 1 and so as to satisfy 2 ⁇ r1 ⁇ r2, 3 ⁇ L2 ⁇ L1, r1 ⁇ L1, L2 ⁇ 0. It is preferable that ⁇ 2 is set.
  • the intersection of the first main beam and the diffusing member refers to an intersection of the first main beam and the inner surface of the diffusing member.
  • the lens unit is subjected to a diffusion treatment on at least one of the incident surface and the exit surface.
  • the diffusivity in the vicinity of the optical axis of each of the plurality of LEDs is enhanced in the lens unit as compared with other parts.
  • the lens portion includes a single lens portion formed in an annular shape along the arrangement direction of the plurality of LEDs.
  • the lens unit includes a plurality of lens units respectively provided at positions corresponding to the plurality of LEDs.
  • the plurality of LEDs are concentric with the first circle arranged on the circumference of the first circle whose radius is set to r1, and the radius is larger than r1.
  • a plurality of second LEDs arranged on the circumference of the second circle set to r2, and the lens unit includes a first lens unit provided at a portion corresponding to the plurality of first LEDs; And a second lens portion provided in a portion corresponding to the plurality of second LEDs.
  • FIG. 2A is an external perspective view of the same as seen from the front side
  • FIG. 2B is an external perspective view of the same as seen from the rear side. It is a principal part enlarged view same as the above.
  • 4A and 4B are light distribution characteristics diagrams of the optical member constituting the same.
  • 5A and 5B are light distribution characteristics diagrams of another optical member constituting the same.
  • 6A and 6B are light distribution characteristics diagrams of still another optical member constituting the same.
  • 7A and 7B are light distribution characteristic diagrams of still another optical member constituting the same.
  • 8A and 8B are enlarged views of main parts of the optical member constituting the same.
  • FIG. 11A is a schematic diagram showing a light distribution state by an optical member constituting the same
  • FIG. 11B is a schematic diagram showing a light distribution state by an optical member to be compared
  • 12A and 12B are the same luminance distribution diagrams
  • FIGS. 12C and 12D are luminance distribution diagrams of the luminaire including the optical member to be compared.
  • This luminaire is a so-called ceiling light, and is used to illuminate the entire room by being directly attached to the ceiling.
  • FIG. 1 is an exploded perspective view showing an example of a lighting fixture A according to the present embodiment.
  • the lighting fixture A includes a fixture main body 1 formed in a disk shape and a power feeding portion 5 arranged at the center of the fixture main body 1. And the light emitting unit 2 arranged in an annular shape around the power feeding unit 5.
  • the luminaire A is disposed in front of the light emitting unit 2, the optical member 3 that controls the light distribution of the light emitted from the light emitting unit 2, the front of the optical member 3, and the light distribution control by the optical member 3.
  • a diffusing member 4 for diffusing the light from the light emitting unit 2.
  • the light emitting unit 2 includes a plurality of (four in FIG. 1) mounting substrates 21 that are curved in an arc shape, and a plurality of LEDs (light emitting diodes) are provided on one surface (front surface; upper surface in FIG. 1) of each mounting substrate 21. ) 22 are mounted in two rows in the width direction of the mounting substrate 21 and along the longitudinal direction of the mounting substrate 21. As shown in FIG. 1, these mounting boards 21 are arranged in an annular shape around a power feeding unit 5 arranged in the center of the instrument body 1, and are attached to the instrument body 1 using, for example, mounting screws (not shown). It is attached.
  • the plurality of LEDs 22 are concentric with the first circle and the radius is larger than r1 with the plurality of first LEDs 221 arranged on the circumference of the first circle whose radius is set to r1. and a plurality of second LEDs 222 arranged on the circumference of the second circle set to r2.
  • the plurality of first LEDs 221 are arranged at equal intervals on the circumference of the first circle
  • the plurality of second LEDs 222 are arranged at equal intervals on the circumference of the second circle.
  • the power supply unit 5 generates lighting power for lighting the plurality of LEDs 22 mounted on the mounting board 21 and supplies the generated lighting power to each mounting board 21 via an electric wire (not shown). Specifically, the power supply unit 5 converts an AC voltage supplied from an external power source (not shown) into a DC voltage having a desired voltage value (a voltage value necessary for lighting the LED 22), and converts the converted DC voltage. A voltage is supplied to each mounting substrate 21. In addition, this electric power feeding part 5 is attached to the instrument main body 1 using an attachment screw (not shown), for example.
  • the diffusing member 4 is formed in a dome shape with one surface (rear surface; lower surface in FIG. 1) opened by milky white acrylic resin to which a light diffusing agent is added, for example, and is detachable from the front of the optical member 3 to the instrument body 1. It is attached.
  • the optical member 3 is made of a light-transmitting material (for example, acrylic resin, polycarbonate resin, glass, etc.), and has a disc-shaped main body 31 having a circular opening 31a formed at the center.
  • lens portions 32 and 33 that are convex forward are concentrically arranged in two rows. Is provided.
  • the lens unit 32 is provided in a form corresponding to the LED 221 mounted on the inner side (the power feeding unit 5 side) of each mounting substrate 21, and the outer side (the opposite side to the power feeding unit 5) of each mounting substrate 21.
  • the lens unit 33 is provided in a form corresponding to the LED 222 mounted on the).
  • the optical member 3 includes lens portions 32 and 33 that are convex forward at portions corresponding to the plurality of LEDs 22 (221 and 222).
  • the lens part includes a first lens part 32 provided at a part corresponding to the plurality of first LEDs 221 and a second lens part 33 provided at a part corresponding to the plurality of second LEDs 222.
  • the first lens unit 32 is a single member and is formed in an annular shape along the arrangement direction of the plurality of first LEDs (that is, the first lens unit 32 is the first lens unit 32). It is rotationally symmetric at an arbitrary angle with respect to the center of one circle).
  • the second lens portion 33 is a single member and is formed in an annular shape along the arrangement direction of the plurality of second LEDs (that is, the second lens portion 33 is formed of a second circle. It is rotationally symmetric at any angle with respect to the center).
  • the lens part 32 is formed in a convex curved surface that is convex forward (upper side in FIG. 3), and a storage concave part 32c for arranging a plurality of LEDs 221 is formed in an annular shape on the rear side (lower side in FIG. 3). Tunnel). Further, in the direction connecting the LED 22 and the power supply unit in the assembled state (the direction connecting the lens unit 32 and the power supply unit 5; the first direction; the left-right direction in FIG. 3), the power supply unit 5 side of the lens unit 32 (FIG. 3 is provided with a first convex portion 32a (in an annular shape), and the light from the LED 221 incident on the first convex portion 32a is disposed forward. Light is distributed toward the center of the diffusing member 4.
  • a second convex portion 32b is provided (in an annular shape) at the end of the lens portion 32 opposite to the power feeding portion 5 (right side in FIG. 3) in the first direction.
  • the light from the LED 221 incident on the second convex portion 32b is distributed toward the outer edge portion side of the diffusing member 4 disposed on the front side.
  • the lens portion 33 is also formed in a convex curved surface that is convex forward (upper side in FIG. 3), and a storage concave portion 33c for arranging the plurality of LEDs 222 is annular in the rear (lower side in FIG. 3). (In the form of a tunnel).
  • a first convex portion 33a is provided (in an annular shape) at the end of the lens portion 33 on the power feeding portion 5 side (left side in FIG. 3) in the first direction. The light from the LED 222 incident on the convex portion 33a is distributed toward the center of the diffusion member 4 disposed in front.
  • a second convex portion 33b is provided (in an annular shape) at the end of the lens portion 33 opposite to the power feeding portion 5 (on the right side in FIG. 3) in the first direction.
  • the light from the LED 222 incident on the second convex portion 33b is distributed toward the outer edge portion side of the diffusing member 4 disposed on the front side.
  • the optical member 3 is attached to the instrument body 1 using, for example, an attachment screw (not shown).
  • an attachment screw not shown.
  • the light distribution characteristics of the lens portions 32 and 33 will be described later.
  • the lens unit 32 may be provided with a plurality of storage recesses 32c at positions corresponding to the plurality of LEDs 221.
  • the lens unit 33 may be provided with a plurality of storage recesses 33 c at positions corresponding to the plurality of LEDs 222.
  • the lens unit 32 may include a plurality of lens units respectively provided at positions corresponding to the plurality of LEDs 221. That is, a lens part having a first convex part and a second convex part may be provided (individually) for each of the plurality of first LEDs 221.
  • the lens unit 33 may include a plurality of lens units respectively provided at positions corresponding to the plurality of LEDs 222. That is, a lens part having a first convex part and a second convex part may be provided (individually) for each of the plurality of second LEDs 221.
  • the operator attaches the power feeding unit 5 to the central portion of the instrument body 1 and attaches the mounting substrate 21 to one surface (front surface; upper surface in FIG. 1) of the instrument body 1. Are electrically connected using an electric wire (not shown). After that, the operator attaches the optical member 3 to the fixture body 1 from the front so as to cover each mounting substrate 21, and then attaches the diffusion member 4 to the fixture body 1 from the front, thereby completing the assembly of the lighting fixture A. (See FIGS. 2A and 2B).
  • FIG. 4A is a light distribution characteristic diagram (light ray trajectory) of the lens unit 32 when a point light source is arranged at the center.
  • FIG. 4B is a light distribution characteristic diagram (light distribution curve) of the lens unit 32 when the LED 221 is disposed at the center. The light emitted from the LED 221 is emitted radially from the emission surface 32 d of the lens unit 32.
  • the light emitted from the first convex portion 32a is distributed toward the left side in FIG. 4A, that is, toward the central portion of the diffusing member 4, and is emitted from the second convex portion 32b.
  • the light is distributed toward the right side in FIG. 4A, that is, toward the outer edge side of the diffusing member 4.
  • FIG. 5A is a light distribution characteristic diagram of the lens unit 33 when a point light source is arranged at the center.
  • FIG. 5B is a light distribution characteristic diagram of the lens unit 33 when the LED 222 is disposed at the center. The light emitted from the LED 222 is emitted radially from the emission surface 33 d of the lens unit 33.
  • the light emitted from the first convex portion 33a is distributed toward the left side in FIG. 5A, that is, toward the center portion of the diffusing member 4, and is emitted from the second convex portion 33b. Is distributed toward the right side in FIG. 5A, that is, toward the outer edge of the diffusing member 4.
  • FIG. 4B when FIG. 4B is compared with FIG. 5B, light emitted from the first convex portion 32a of the lens portion 32 with respect to the optical axis of the LED 22 (the vertical axis in FIGS. 4B and 5B) (
  • the emission angle of the main beam having the strongest light intensity among the light emitted from the LED 221 through the first convex portion 32 a and the light emitted to the power feeding portion 5 side is the first convex portion 33 a of the lens portion 33.
  • Larger than the emission angle of the main beam having the highest light intensity among the light emitted from the LED (the light emitted from the LED 222 through the first convex portion 33a; the light emitted to the side opposite to the power supply unit 5). It has become.
  • the main beam emitted from the first convex portion 32a of the lens portion 32 is distributed more toward the center of the diffusing member 4 than the main beam emitted from the first convex portion 33a of the lens portion 33. ing. Further, the light intensity of the main beam emitted from the first convex portion 32 a of the lens portion 32 is higher than that of the main beam emitted from the first convex portion 33 a of the lens portion 33.
  • the emission angle of the main beam having the highest light intensity among the light emitted from the second convex portion 32 b of the lens portion 32 with respect to the optical axis is emitted from the second convex portion 33 b of the lens portion 33. It is substantially the same angle as the emission angle of the main beam having the highest light intensity among the light beams. Further, the light intensity of the main beam emitted from the second convex portion 33 b of the lens portion 33 is higher than that of the main beam emitted from the second convex portion 32 b of the lens portion 32.
  • the main beam emitted from the first convex portions 32a and 33a is the first main beam
  • the main beam emitted from the second convex portions 32b and 33b is the second main beam. It is.
  • the light emitted from the LED 22 by the first convex portions 32a and 33a can be distributed toward the center of the diffusing member 4, and further, the second convex portions 32b and 33b can distribute the light.
  • Light emitted from the LED 22 can be distributed toward the outer edge of the diffusing member 4.
  • the light emitted from other parts of the lens portions 32 and 33 is distributed between the central portion and the outer edge portion of the diffusing member 4, the light emitted from the LED 22 is distributed over the entire surface of the diffusing member 4. Can distribute light. As a result, it can suppress that the center part and outer edge part of the diffusion member 4 become dark, and can provide the lighting fixture A which improved the appearance.
  • the plurality of LEDs 22 includes a plurality of first LEDs 221 and a plurality of second LEDs 222;
  • the lens unit includes a lens unit 32 and a lens unit 33; and the lens unit 32 disposed on the inner side (the power supply unit 5 side)
  • the lens portion 33 arranged on the opposite side has the highest light intensity among the light emitted from the corresponding LED 222 through its own first convex portion 33a (the convex portion on the power feeding portion 5 side).
  • the intensity of the main beam of the corresponding LED 22 Weaker than the intensity of its second protrusions 33b main beam among light intensity of the light is strongest second emitted through the (opposite convex portions of the feeding portion 5).
  • the light emitted from the LED 221 through the first convex portion 32 a of the lens portion 32 is distributed to the center side of the diffusing member 4, and is emitted from the LED 222 through the second convex portion 33 b of the lens portion 33.
  • the emitted light is distributed to the outer edge portion side of the diffusing member 4. Therefore, the light emitted from the plurality of LEDs 22 can be distributed over the entire surface of the diffusing member 4. As a result, it can suppress that the center part and outer edge part of the diffusion member 4 become dark, and can provide the lighting fixture A which improved the appearance.
  • the lens portions 32 and 33 are asymmetrical and the shapes of the lens portions 32 and 33 are different from each other has been described.
  • You may provide the lens part 34 of the same shape.
  • the first main beams emitted from each LED 22 through the first convex portion 34a of the lens portion 34 all have the same emission angle, and the second convex portion 34b of the lens portion 34 from each LED 22. All the second main beams emitted through the same emission angle.
  • the luminance unevenness appearing on the diffusing member 4 can be reduced, and the luminaire A having improved appearance can be provided.
  • the light distribution characteristic (light distribution curve) of the LED 22 emitted from each lens unit 34 is as shown in FIG. 6B.
  • a lens portion 35 having a symmetrical shape with respect to the optical axis P1 of the LED 22 may be used.
  • the light distribution characteristics of the LED 22 are substantially symmetric with respect to the optical axis P1. Therefore, in this case, the emission angle of the first main beam emitted from the first convex portion 35a of each lens portion 35 and the emission angle of the second main beam emitted from the second convex portion 35b are as follows. Are set at the same angle with respect to the optical axis P1.
  • the light distribution design can be easily performed, the intensity of the light emitted to the central part and the outer edge of the diffusing member 4 is the highest, and the luminance decreases monotonously toward the LED 22 side.
  • the brightness distribution in the diffusing member 4 becomes smooth, and the appearance is improved.
  • a lens portion 36 in which the exit surface 36d and the entrance surface 36e are each subjected to diffusion treatment may be used.
  • the luminance distribution in the diffusion member 4 is used. Since the change of becomes smoother, the appearance is further improved.
  • the diffusion process may be performed on both the exit surface 36d and the entrance surface 36e as described above, or may be performed only on either the exit surface 36d or the entrance surface 36e.
  • the LED 22 since the LED 22 has a higher light intensity in the vicinity of the optical axis P1 than in other parts, the diffusibility in the vicinity of the optical axis P1 on the exit surface 36d and the entrance surface 36e of the lens unit 36 is enhanced compared to other parts. It is also possible (see FIG. 8B). In this case, the luminance in the vicinity of the optical axis P1 of the LED 22 can be kept low, and as a result, the luminance distribution in the diffusing member 4 becomes smoother, which further improves the appearance.
  • two rows of lens portions are provided, but may be one row, for example, three or more rows, and may be provided as appropriate in a form corresponding to the LED.
  • the shape of the instrument body 1 is not limited to the present embodiment, and may be, for example, a rectangular shape or other shapes.
  • each lens part by making the shape of each lens part the same, the emission angle of the first main beam emitted from the first convex part and the second emitted from the second convex part.
  • the exit angles of the main beams are the same between the lens portions, but the shapes of the lens portions are not necessarily the same, and the first main beam and the second main beam are emitted. Any shape may be used as long as the angle is the same between the lens portions.
  • each lens portion is symmetrical with respect to the optical axis, so that the emission angle of the first main beam emitted from the first projection and the second projection are used.
  • the emission angle of the emitted second main beam is the same angle, but the shape of each lens portion does not necessarily have to be a symmetric shape, and the emission angle of the first main beam and the second main beam are not necessarily symmetrical. Any shape may be used as long as the beam emission angle is the same.
  • Embodiment 2 A second embodiment of the luminaire A will be described with reference to FIGS. In addition, about the basic structure of the lighting fixture A, it is the same as that of Embodiment 1, and refer FIG. 1 as needed.
  • FIG. 9 is a schematic diagram showing a light distribution state of the lighting fixture A of the present embodiment.
  • the lighting fixture A of this embodiment includes a plurality of LEDs 22.
  • the plurality of LEDs 22 includes a plurality of first LEDs 221 and a plurality of second LEDs 222.
  • the first LED 221 (right side in FIG. 9) is arranged on the circumference of the first circle set to the radius r1, and the second LED 222 (left side in FIG. 9) is the first circle.
  • r2 radius of r1
  • c1 in FIG. 9 is the center of the first circle and the second circle.
  • a disk-shaped optical member 3 (see FIG. 1) is arranged in front of these LEDs 22 as in the first embodiment, and the portions corresponding to the respective LEDs 22 (221, 222) are projected forward.
  • a lens unit 38 (see FIG. 10A) is provided. Further, in each lens portion 38, a first convex portion 38a is provided on one end side (the center side of the first circle; the right side in FIG. 10A) as in the first embodiment, and the other end side (see FIG. The second convex portion 38b is provided on the left side in 10A.
  • the first lens unit 381 is configured by the lens units 38 corresponding to the plurality of first LEDs 221
  • the second lens unit 382 is configured by the lens units 38 corresponding to the plurality of second LEDs 222.
  • the first lens portion 381 and the second lens portion 382 are formed so as to have the same cross-sectional shape.
  • the angle ⁇ 1 in FIG. 9 is light emitted from the first convex portion of the first lens portion 381 (emitted from the first LED 221 through the first convex portion of the first lens portion 381).
  • the angle between the first main beam b 1 having the highest light intensity and the optical axis P 3 of the first LED 221, and the angle ⁇ 2 is from the first convex portion of the second lens portion 382.
  • the first main beam b2 having the highest light intensity, and the second LED 222 This is the angle formed with the optical axis P4.
  • the point a1 is located on the opposite side to the first line P2. That is, the first main beam b1 from the first LED 221 is irradiated on the other side of the center c1 of the first circle in the diffusing member 4.
  • the point a2 is located on the opposite side with respect to the first line P2. That is, the first main beam b ⁇ b> 2 from the second LED 222 is irradiated on the other side of the center c ⁇ b> 1 of the second circle in the diffusing member 4.
  • the distance L1 in FIG. 9 is a distance from the point a1 to the first line P2 passing through the centers c1 of the first circle and the second circle and parallel to the optical axis P3, and the distance L2 is The distance from the point a2 to the first line P2.
  • the angles ⁇ 1 and ⁇ 2 of the first main beams b1 and b2 emitted from the first convex portions of the first lens portion 381 and the second lens portion 382 are the following (1) to It is set so as to satisfy the formula (4), whereby the light distribution amount near the center of the diffusing member 4 (in the vicinity of the first line P2) can be increased. This will be specifically described below.
  • FIGS. 10A and 10B are light distribution characteristics diagrams of the optical member 3 of the present embodiment.
  • FIGS. 10C and 10D are light distribution characteristics diagrams of the optical member 3 to be compared.
  • FIG. 11B is a schematic diagram showing a light distribution state by a lighting fixture including the lens unit 37 to be compared.
  • r1 155 mm
  • r2 190 mm
  • L1 102.74 mm
  • L2 52.37 mm.
  • FIG. 11A is a schematic diagram showing a light distribution state by a lighting fixture including the lens unit 38 of the present embodiment.
  • r1 125 mm
  • r2 190 mm
  • L1 70.99 mm
  • L2 13.45 mm.
  • all of the expressions (1) to (4) are satisfied.
  • 11B it can be seen that the first main beams b1 and b2 are irradiated toward the center of the diffusing member 4 (see FIGS. 12A and 12B).
  • twice the distance L2 is “the first from the two second LEDs 222 when considering the two second LEDs 222 that are arranged symmetrically with respect to the center c1 of the second circle. This corresponds to the distance "between the intersections of the main beam b2 and the diffusing member 4. Therefore, by setting twice the distance L2 to be equal to or smaller than the difference between the distance L1 and the distance L2 (2 ⁇ L2 ⁇ L1 ⁇ L2) as described above, the luminance uniformity can be improved near the center of the diffusing member 4. it can.
  • the point a1 is preferably located within the first circle at a location that is not too far from the circumference of the first circle. Specifically, it is preferable that r1 ⁇ L1 + (L1 ⁇ L2) is satisfied.
  • the first main beam b1 of the first LED 221 is irradiated at substantially equal intervals in the radial direction of the first circle, and the luminance uniformity of the diffusing member 4 can be improved.
  • the difference between the radius r1 of the first circle and the distance L1 is substantially equal to the difference between the distance L1 and the distance L2 (r1 ⁇ L1 ⁇ L1 ⁇ L2).
  • the first lens portion and the second lens portion have the same shape (lens portion 38), but if the amount of light distribution near the center of the diffusing member 4 can be increased,
  • the shape may be different and is not limited to this embodiment.
  • the values of r1, r2, L1, L2, ⁇ 1, and ⁇ 2 are examples, and other values may be used as long as they satisfy all of the above expressions (1) to (4).
  • the luminance of the diffusing member 4 It is possible to provide the lighting fixture A with improved uniformity and improved appearance.
PCT/JP2013/004570 2012-08-08 2013-07-29 照明器具 WO2014024412A1 (ja)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5793263B1 (ja) * 2014-02-22 2015-10-14 アイリスオーヤマ株式会社 Ｌｅｄ照明装置
JP2019220358A (ja) * 2018-06-20 2019-12-26 コイズミ照明株式会社 光拡散カバー及びそれを備えた照明器具

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5919505B2 (ja) * 2011-08-24 2016-05-18 パナソニックＩｐマネジメント株式会社 照明器具
KR101568267B1 (ko) 2014-04-15 2015-11-11 노명재 다중 광원의 통합 제어용 집광형 렌즈광학계를 포함하는 라인 설계형 led 집광모듈
CN105179982B (zh) * 2015-10-23 2018-07-31 欧普照明股份有限公司 照明装置
JP6931809B2 (ja) * 2017-04-13 2021-09-08 パナソニックＩｐマネジメント株式会社 照明器具
JP6986701B2 (ja) * 2017-08-09 2021-12-22 パナソニックＩｐマネジメント株式会社 照明装置、及び照明器具
JP2019175722A (ja) * 2018-03-29 2019-10-10 コイズミ照明株式会社 光学部材および照明器具

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012094317A (ja) * 2010-10-26 2012-05-17 Panasonic Corp 照明器具
JP2012104476A (ja) * 2010-10-12 2012-05-31 Toshiba Lighting & Technology Corp 照明装置
JP2012146667A (ja) * 2012-02-17 2012-08-02 Toshiba Lighting & Technology Corp 照明器具

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5594600B2 (ja) * 2011-01-11 2014-09-24 東芝ライテック株式会社 照明器具

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012104476A (ja) * 2010-10-12 2012-05-31 Toshiba Lighting & Technology Corp 照明装置
JP2012094317A (ja) * 2010-10-26 2012-05-17 Panasonic Corp 照明器具
JP2012146667A (ja) * 2012-02-17 2012-08-02 Toshiba Lighting & Technology Corp 照明器具

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5793263B1 (ja) * 2014-02-22 2015-10-14 アイリスオーヤマ株式会社 Ｌｅｄ照明装置
JP2019220358A (ja) * 2018-06-20 2019-12-26 コイズミ照明株式会社 光拡散カバー及びそれを備えた照明器具
JP7065703B2 (ja) 2018-06-20 2022-05-12 コイズミ照明株式会社 光拡散カバー及びそれを備えた照明器具

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