WO2024014467A1 - Dispositif d'éclairage - Google Patents

Dispositif d'éclairage Download PDF

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Publication number
WO2024014467A1
WO2024014467A1 PCT/JP2023/025670 JP2023025670W WO2024014467A1 WO 2024014467 A1 WO2024014467 A1 WO 2024014467A1 JP 2023025670 W JP2023025670 W JP 2023025670W WO 2024014467 A1 WO2024014467 A1 WO 2024014467A1
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WIPO (PCT)
Prior art keywords
light
light distribution
lighting device
light source
optical elements
Prior art date
Application number
PCT/JP2023/025670
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English (en)
Japanese (ja)
Inventor
昌也 春田
亮介 青木
鈴木　一樹
Original Assignee
株式会社遠藤照明
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Application filed by 株式会社遠藤照明 filed Critical 株式会社遠藤照明
Priority to JP2024504938A priority Critical patent/JPWO2024014467A1/ja
Publication of WO2024014467A1 publication Critical patent/WO2024014467A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • 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
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • 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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/06—Controlling the distribution of the light emitted by adjustment of elements by movement of refractors
    • 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
    • F21V5/02—Refractors for light sources of prismatic 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
    • F21V5/04—Refractors for light sources of lens shape
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • 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
    • F21Y2113/00—Combination of light sources
    • F21Y2113/10—Combination of light sources of different colours
    • F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
    • 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
    • F21Y2113/00—Combination of light sources
    • F21Y2113/10—Combination of light sources of different colours
    • F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
    • F21Y2113/17—Combination of light sources of different colours comprising an assembly of point-like light sources forming a single encapsulated light 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a lighting device having multiple light distribution directions.
  • Patent Document 1 discloses a two-light distribution type illumination device used for road illumination and the like. The purpose of this is to distribute light in the left-right direction using a lens with a pair of side convex portions for each of a plurality of light sources, thereby illuminating a horizontally long area. Although the amount of light distributed in the center direction is small, the distance in the center direction is also small, which is said to suppress the drop in illuminance in the center and illuminate a horizontally long area while suppressing uneven illuminance.
  • Patent Document 1 The illumination device described in Patent Document 1 is intended to illuminate a horizontally long area relatively uniformly, and is not intended to illuminate two directions. Furthermore, since this is an outdoor lighting device, it does not reduce the clutter of the ceiling.
  • An object of the present invention is to reduce the number of installed lighting devices in indoor lighting, and to reduce the appearance of clutter on the ceiling.
  • it is also an issue to reduce the number of installed lighting devices to reduce the sense of clutter caused by a large number of lighting devices.
  • Another challenge is to reduce installation costs.
  • the present invention is an illumination device including a light source and a two-light distribution optical element having two light distribution areas, The light emitted from the light source is distributed by the two light distribution optical elements so that the light intensity has a peak in two different directions having a predetermined angle between the two light distributions, The angle between the two light distributions can be changed by changing the distance between the light source and the lower surface of the two light distribution optical elements so that it takes a value between a minimum value and a maximum value.
  • the lighting device includes a rear reflector that is movable integrally with the light source,
  • the height of the rear reflector which is the distance between the light source and a virtual plane including the upper end of the rear reflector in the optical axis direction of the light source, is equal to the distance between the light source and the lower surface of the two light distribution optical elements. It may be less than the minimum value.
  • the illumination device includes a front reflecting mirror that is movable integrally with the two light distribution optical elements, When the distance between the light source and the lower surface of the two light distribution optical elements is the minimum value, the rear reflecting mirror may be inside the front reflecting mirror.
  • the present invention is an illumination device comprising a light source having an optical axis, a reflecting mirror arranged to surround the optical axis, and two light distribution optical elements into which light enters from the light source and the reflecting mirror,
  • the reflecting mirror reflects the light emitted from the center of the light source in a direction different from the optical axis direction
  • the two light distribution optical elements include a light entrance surface and a light exit surface, In the lighting device, the light emitted from the light source is distributed by the two light distribution optical elements so as to have luminous intensity peaks in two different directions.
  • the present invention is a lighting device that includes a lamp body and a frame, and in which the angle of the lamp body can be changed with respect to the frame,
  • the lamp body includes a light source having an optical axis, a reflecting mirror arranged to surround the optical axis, and two light distribution optical elements into which light from the light source and the reflecting mirror enters,
  • the reflecting mirror reflects the light emitted from the center of the light source in a direction different from the optical axis direction
  • the two light distribution optical elements include a light entrance surface and a light exit surface, The light emitted from the light source is distributed by the two light distribution optical elements so as to have luminous intensity peaks in two different directions,
  • the lighting device is capable of distributing light in one of the two directions perpendicular to the frame by changing the angle of the lamp body.
  • the reflecting mirror may reflect the light emitted from the center of the light source outward by 5 degrees or more from the optical axis direction.
  • the reflecting mirror is rotationally symmetrical with respect to the optical axis
  • the outer shape of the two light distribution optical elements may be circular.
  • the present invention is an illumination device comprising a light source and a two-light distribution optical element into which light from the light source enters,
  • the outer shape of the two light distribution optical elements is circular;
  • the two light distribution optical elements include a light entrance surface and a light exit surface, and include two light distribution regions on at least one of the light entrance surface and the light exit surface,
  • the light distribution area is a virtual light distribution area cut out by the outer shape of the two light distribution optical elements and is a range that does not overlap with other light distribution areas,
  • the light emitted from the light source is distributed by the two light distribution regions so that the light intensity has peaks in two different directions.
  • the present invention is a lighting device that includes a lamp body and a frame, and in which the angle of the lamp body can be changed with respect to the frame,
  • the lamp body includes a light source and two light distribution optical elements into which light from the light source enters,
  • the outer shape of the two light distribution optical elements is circular;
  • the two light distribution optical elements include a light incidence surface and a light emission surface, and include two light distribution regions on at least one of the light incidence surface and the light emission surface,
  • the light distribution area is a virtual light distribution area cut out by the outer shape of the two light distribution optical elements and is a range that does not overlap with other light distribution areas,
  • the light emitted from the light source is distributed by the two light distribution regions so that the light intensity has peaks in two different directions,
  • the lighting device is capable of distributing light in one of the two directions perpendicular to the frame by changing the angle of the lamp body.
  • the two light distribution optical elements may be replaceable while the lighting device is installed.
  • the ratio of the distance between the center lines of the two light distribution regions to the diameter of the two light distribution optical elements may be 45% or more and 100% or less.
  • the light distribution characteristics of the two light distribution regions may be different.
  • linear convex portions or concave portions extending in one direction may be arranged and provided in the other direction.
  • the light source may be composed of LEDs of a plurality of emission colors, and a blue-white LED, a yellow-white LED, and a red LED are arranged as the LEDs of the plurality of emission colors.
  • the present invention by distributing light in two directions in a lighting device, it is possible to reduce the number of installed lighting devices and reduce the feeling of clutter caused by installing a large number of lighting devices on the ceiling or outdoors. can.
  • FIG. 1 Side sectional view of the lighting device of Embodiment 1 installed A cross-sectional view illustrating a reflecting mirror and a light beam of the illumination device of Embodiment 1.
  • Illuminance distribution simulation results on desk and wall surfaces when the lamp body is rotated in the lighting device of Embodiment 1 A schematic cross-sectional diagram showing the positional relationship between the light source, the reflecting mirror, and the two light distribution optical elements of the lighting device of Embodiment 2.
  • Simulation results of light distribution characteristics of the lighting device of Embodiment 2 Simulation results of illuminance distribution of the lighting device of Embodiment 2
  • Side sectional view of the lighting device of Embodiment 3 Side sectional view of the lighting device of Embodiment 4
  • Side sectional view of the lighting device of Embodiment 5 A plan view of two light distribution optical elements and their mounting parts of the illumination device of Embodiment 6, viewed from the light output surface side.
  • Simulation diagram when a hallway is illuminated by the lighting device of Embodiment 6 A plan view and a cross-sectional view of the two-light distribution optical element of the illumination device of Embodiment 7, viewed from the light exit surface side. Simulation results of illuminance distribution in the lighting device of Embodiment 7 Simulation diagram of light distribution characteristics in the lighting device of Embodiment 7 A plan view of the two-light distribution optical element of the illumination device of Embodiment 8, viewed from the light exit surface side.
  • Simulation results of illuminance distribution in the lighting device of Embodiment 8 Simulation diagram of light distribution characteristics in the lighting device of Embodiment 8 Chromaticity diagram to explain the chromaticity of LEDs
  • Cross-sectional view of main parts of a lamp body of a lighting device according to a ninth embodiment using a two-light distribution prism as a two-light distribution optical element A cross-sectional view of the main part of a lamp body of a lighting device according to a tenth embodiment using a two-light distribution Fresnel prism as a two-light distribution optical element.
  • the lighting device 300 of this embodiment is a two-way light distribution type lighting device that performs light distribution BL on the left side and light distribution BR on the right side.
  • FIG. 1 shows a side sectional view of the lighting device 300 installed in a hole 391 provided in a ceiling plate of a ceiling 390.
  • the frame 310 installed in the hole 391 includes three attachment springs 312 (only one is shown in FIG. 1).
  • the lamp body fixing part 330 includes a light shielding plate 334 and is fixed to the frame 310.
  • the lamp body 320 includes a heat sink 321, a light source 322 which is a COB type LED (the diameter of the light emitting part is 9 mm), a COB holder 323, a reflector 324, a two-light distribution lens 325 which is a two-light distribution optical element, a side surface 326 of the lamp body, and a lamp.
  • a front body surface 327 is provided.
  • the distance H between the center of the surface of the light source 322 and the lower surface of the two light distribution lenses 325 is 28 mm.
  • the lamp body 320 is installed on the lamp body fixing part 330 so that the rotation in the axial direction and the inclination of the axis are variable.
  • the lighting device 300 also includes a power source 340, a terminal block 341, a power source block 342, a wireless module 347, a power line 348, and a power supply line 349.
  • ⁇ Installation work> In order to install the lighting device 300 on the ceiling 390, (1) make a hole 391 in the ceiling 390, (2) perform wiring work for the electric light line 348 if the electric light line 348 is not prepared, (3) ) Pull out the light wire 348 from the hole 391 and connect it to the terminal block 341, (4) Place the power supply 340 on the ceiling 390 through the hole 391, (5) Attach the frame 310 to the hole 391, (6) Light body fixing part 330 and the light body 320 to the frame 310 are required, which incurs labor and transportation costs. Therefore, reducing the installation location of lighting devices not only eliminates the clutter of the ceiling but also leads to a reduction in installation costs.
  • the lighting device 300 can be wirelessly controlled by a lighting control device 370.
  • the lighting control device 370 is, for example, a tablet, a smartphone, or a PC, and has lighting control software 371 (not shown) installed therein.
  • Lighting control software 371 in lighting control device 370 wirelessly transmits a dimming and color control signal from lighting control device 370 .
  • the dimming signal is received by wireless module 347 in lighting device 300 .
  • the wireless module 347 transmits the control signal to the power source 340, and the power source 340 supplies driving power controlled by the control signal to the light source 322, which is a COB type LED, through a power supply line 349.
  • the lighting control can be changed manually using the lighting control device 370 when the user wants to change the lighting conditions. Further, by setting a schedule in advance in the lighting control software 371, it is possible to perform automatic control such as lowering the brightness of the lighting device 300 and lowering the color temperature in the evening, for example.
  • ⁇ Light rays and reflectors> As an example of a light ray in the illumination device 300, as shown in FIG. B 14 and a ray B 24 that originates from the center of the light source and passes directly through the lens.
  • the light ray B 11 is reflected by the reflecting mirror 324, enters the two-light distribution lens 325 as a ray B 12 , is transmitted as a ray B 123 , and exits as a ray B 14 .
  • the light ray B 21 enters the two-light distribution lens 325, is transmitted as a light ray B 23 , and exits as a light ray B 24 .
  • FIG. 2 shows a cross-sectional view in a plane including the optical axis AX for explaining the reflecting mirror 324 and light beams of the illumination device 300.
  • the reflecting mirror 324 has a shape arranged so as to surround the optical axis AX, and specifically has a shape that is axially symmetrical with respect to the optical axis AX.
  • a commonly used reflecting mirror reflects light from a light source in the optical axis direction, but in the reflecting mirror 324, the light ray B11 emitted from the light source center 322C located on the optical axis is reflected by the reflecting mirror 324, and the optical axis This results in a ray B12 in the lower left direction having an angle of 25° with respect to AX. Therefore, as shown in FIG.
  • the light ray B 14 transmitted through the two light distribution lens 325 as the light ray B 13 and emitted is distributed outward from the optical axis AX direction. Ingredients are reduced.
  • the light beam B 12 reflected by the reflecting mirror 324 preferably points outward by 5 degrees or more with respect to the optical axis AX, and more preferably by 10 degrees or more.
  • the reflected light rays do not need to be parallel rays in a cross-sectional view including the optical axis AX.
  • FIG. 3(b) A plan view of the two-light distribution lens 325 viewed from the light exit surface side is shown in FIG. 3(b).
  • FIGS. 3A and 3B show two light distribution lenses 325S and 325T, respectively, which are variations of the interval Lc (described later) between the two light distribution lenses 325.
  • the horizontal direction is the x direction
  • the vertical direction is the y direction.
  • the two-light distribution lens 325 shown in FIG. 3(b) will be described below as a representative example.
  • the outer shape of the two light distribution lenses 325 (two light distribution lenses 325S, 325T) is circular. Therefore, it is possible to use a component for a conventional downlight that distributes light in one direction, specifically, as the lamp body 320, for example, a component for a conventional downlight that distributes light in one direction.
  • the upper surface (light exit surface) of the two light distribution lenses 325 includes a left convex lens area 325 (1) which is a left light distribution area on one side (left side) in the x direction, and a right light distribution area on the other side (right side). It is divided into a right convex lens area 325(2), a first scattering area 325(3), and a second scattering area 325(4).
  • a convex lens virtual light distribution region having a virtual outline indicated by a dotted line is cut out by the outline of the two light distribution lenses 325, and the other The area extends up to the center line V so that it does not overlap with the convex lens area.
  • the left convex lens region 325(1) and the right convex lens region 325(2) are symmetrical with respect to the center line V.
  • the diameter of the two light distribution lenses 325 is 48 mm, and the diameters of the virtual circular outer shapes shown by dotted lines of the left convex lens region 325 (1) and the right convex lens region 325 (2) are both 45 mm.
  • the distance Lc between the center line J1 of the left convex lens area 325( 1 ) and the center line J2 of the right convex lens area 325( 2 ) is 30 mm. Note that the lower surfaces (light incident surfaces) of the two light distribution lenses 325 (325S, 325T) are flat.
  • the left convex lens area 325 (1) and the right convex lens area 325 (2) are provided with texture for light scattering.
  • a linear uneven structure is provided in the first scattering region 325(3) and the second scattering region 325(4).
  • FIG. 3(a) shows a two-light distribution lens 325S.
  • the distance Lcs between the center line J1 of the left convex lens area 325S( 1 ) and the center line J2 of the right convex lens area 325S(2) is as wide as 40 mm. Therefore, the overlap between the left convex lens region 325S(1) and the right convex lens region 325S(2) becomes smaller, and the first scattering region 325S(3) and the second scattering region 325S(4) become wider.
  • FIG. 3(c) shows a two-light distribution lens 325T.
  • the distance Lct between the center line J 1 of the left convex lens area 325T( 1 ) and the center line J 2 of the right convex lens area 325T(2) is as narrow as 20 mm. Therefore, the overlap between the left convex lens region 325T(1) and the right convex lens region 325T(2) becomes large, and the first scattering region 325T(3) and the second scattering region 325T(4) become narrow.
  • FIGS. 4(a), (b), and (c) show simulation results of light distribution characteristics in the x direction (luminous intensity versus beam angle) when the total luminous flux of the light source is 1000 lm.
  • the light distribution has peaks in the 16° left and right directions, and the luminous intensity in the 0° direction (center direction) is about half that (43%). I understand that. In this way, the peak of the light distribution is not in the 0° direction, and by setting the luminous intensity to 70% or less of the peak in the 0° direction, the two light distributions are clearly separated, and the purpose of illuminating two directions is achieved. This makes it an easy-to-use light source. Further, by setting the luminous intensity to 20% or more of the peak in the 0° direction, it is possible to suppress the illumination appropriately to the extent that the central direction does not feel dark.
  • the light distribution has peaks in the 20° left and right directions, and the light distribution in the 0° direction is about 10% of the peak, and the light distribution is clear in the two directions. You can see that it is divided.
  • the light distribution has peaks in the left and right directions of 10 degrees, and the light distribution in the 0 degree direction is also 82% of the peak, which shows that there is not much of a drop.
  • FIGS. 5(a), (b), and (c) show simulation results of the illuminance distribution at a distance of 2.8 m from the light source when the total luminous flux of the light source is 1000 lm.
  • the horizontal direction is the x direction
  • the vertical direction is the y direction
  • the numerical value in the figure is the illuminance (lx).
  • the illumination area is horizontally long in the x direction, which is different from the original purpose of obtaining two illumination areas by two light distributions, but the horizontally long illumination area is relatively long. A uniform illumination area is achieved.
  • a two-light distribution lens is provided with two convex lens areas on the light exit surface, the light input surface, or both. It is preferable that these are provided at some distance from each other. Specifically, the ratio of the distance between the centers of the two convex lens regions to the diameter of the two light distribution lenses is preferably 45% or more, more preferably 60% or more. On the other hand, if the distance is too large, the areas of the first and second scattering regions other than the convex lens region will increase, so it is preferably 100% or less, and more preferably 80% or less.
  • FIG. 6(b) A plan view of the two-light distribution lens 325 viewed from the light exit surface side is shown in FIG. 6(b).
  • 3A and 3C show two light distribution lenses 325M and 325N, which are virtual diameter variations of the convex lens regions 325(1) and (2) of the two light distribution lenses 325, respectively.
  • the horizontal direction is the x direction
  • the vertical direction is the y direction.
  • the diameter of the two-light distribution lens 325 is 48 mm, and the diameter of the outer shape (circle) of the virtual light distribution area shown by the dotted line of the left convex lens area 325 (1) and the right convex lens area 325 (2) is the two-light distribution lens 325M, For 325 and 325N, they are 55 mm, 45 mm, and 30 mm, respectively.
  • the left convex lens region 325 (1) and the right convex lens region 325 (2) have a virtual circular shape by cutting off a portion of the virtual shape indicated by the dotted line that extends beyond the two light distribution lenses 325. (1) and a right convex lens region 325(2) are formed up to the center line V.
  • the distance Lc between the center line J1 of the left convex lens area 325( 1 ) and the center line J2 of the right convex lens area 325( 2 ) is 30 mm. Note that the lower surfaces (light incident surfaces) of the two light distribution lenses 325M, 325, and 325N are flat.
  • FIG. 6(a) shows a two-light distribution lens 325M.
  • the distance Lc between the center line J 1 of the left convex lens area 325M (1) and the center line J 2 of the right convex lens area 325M (2) is 30 mm, but the virtual distance between the left convex lens area 325M (1) and the right convex lens area 325M (2) is 30 mm. Since the diameter of the outer shape (circular shape) has increased to 55 mm, the first scattering region 325M (3) and the second scattering region 325M (4) are almost eliminated.
  • FIG. 6(c) shows a two-light distribution lens 325N.
  • the distance Lc between the center line J 1 of the left convex lens area 325N (1) and the center line J 2 of the right convex lens area 325N (2) is 30 mm, but the virtual distance between the left convex lens area 325N (1) and the right convex lens area 325N (2) is 30 mm. Since the diameter of the outer shape (circle) is reduced to 35 mm, the first scattering region 325N(3) and the second scattering region 325N(4) are widened.
  • FIGS. 7(a), (b), and (c) show simulation results of light distribution characteristics in the x direction when the total luminous flux of the light source is 1000 lm.
  • the peak angles of the light distribution in Figures 7(a), (b), and (c) are 14°, 18°, and 20° to the left and right of the center, respectively, and the luminous intensity in the center direction is the peak of the light distribution.
  • the luminous intensity at these angles is 47%, 43%, and 38%, respectively.
  • FIGS. 8(a), (b), and (c) show the simulation results of the illuminance distribution at a distance of 2.8 m from the light source when the total luminous flux of the light source is 1000 lm.
  • the horizontal direction is the x direction
  • the vertical direction is the y direction
  • the numerical value in the figure is the illuminance (lx).
  • FIGS. 8(a), (b), and (c) it can be seen that two locations in the x direction are separately illuminated. However, in FIG. 8(c), the illuminance is slightly reduced. This is considered to be because the proportions of the first scattering region 325N(3) and the second scattering region 325N(4), which are other than the convex lens region, are increasing.
  • the ratio of the convex lens area to the diameter of the two light distribution lenses is suitably 60% or more and 120% or less, more preferably 80% or more and 110% or less (light is used more effectively).
  • FIG. 9 is a diagram showing a state in which the light body 320 is rotated with respect to the frame 310 and the light body fixing part 330 in the lighting device 300, and the light distribution direction is changed. Since the lighting device 300 is a downlight (universal downlight) that can change the direction of light distribution, for example, the light distribution BL can be used as downward illumination, and the light distribution BR can be used as diagonal illumination.
  • the lighting device 300 is a downlight (universal downlight) that can change the direction of light distribution, for example, the light distribution BL can be used as downward illumination, and the light distribution BR can be used as diagonal illumination.
  • FIG. 10(a) shows the illuminance distribution simulation result of the desk 382 placed on the floor 380 when the total luminous flux of the light source of the lighting device 300 is 1000 lm and the direction shown in FIG. 9 is used to illuminate the desk 382 placed on the floor 380 with the light distribution BL.
  • FIG. 10(b) shows the illuminance distribution simulation result of the wall 385 when the wall 385 is illuminated with the light distribution BR
  • FIG. 10(c) shows the height of the desk 382 when the desk 382 is illuminated with the light distribution BL.
  • the illuminance distribution simulation results are shown below.
  • the numerical values in the figure are illuminance (lx). Note that the ceiling height was 2.80 m. Actually, since the total luminous flux of the light source of the illumination device 300 is about 1000 lm, it was found that an illuminance of about 500 lx, which is preferred in restaurants, can be obtained on the desk 382 and on the wall 385.
  • Figures 11(a), (b), and (c) show the light source, reflector, and dual light distribution lens when the distance from the light source 322 to the bottom surface of the dual light distribution lens 325 is changed in three ways: 40 mm, 28 mm, and 14 mm.
  • 2 is a schematic diagram of a cross section including the optical axes of illumination devices 300A, 300, and 300C, showing the positional relationship ((b) is the same as in Embodiment 1). In each figure, the horizontal direction is the x direction, and the vertical direction is the z direction. Note that the lighting devices 300A and 300C use reflecting mirrors 324A and 324C, respectively, and the length of the lamp body is changed accordingly, but other configurations are the same as the lighting device 300.
  • FIGS. 12(a), (b), and (c) show simulation results of the light distribution characteristics of the lighting devices 300A, 300, and 300C.
  • the two light distributions are strongly distributed at an angle of 14° to the center, and in the lighting device 300C, the light is strongly distributed in a direction of 35°. In the case of , it can be seen that they are 41% and 14%, respectively.
  • the light distribution in the 0° direction is small, but this is because the 2-light distribution lens 325 used for the lighting device 300 was used, and the lens was redesigned to reduce the amount of light distribution in the 0° direction. It is possible to adjust.
  • Figures 13(a), (b), and (c) show lighting devices 300A, 300, and 300C when the total luminous flux of the light source of the lighting device is 1000 lm and the distance from the lighting device to the floor is 2.8 m.
  • the simulation results of illuminance distribution are shown.
  • the horizontal direction is the x direction
  • the vertical direction is the y direction
  • the numerical value in the figure is illuminance (lx). It can be seen that the illumination devices 300A, 300, and 300C each exhibit an illuminance distribution that is divided into two in the x direction, and the smaller H is, the more distant a place is mainly illuminated.
  • Illumination device 300D a cross-sectional view of a main part shown in FIG. 14, is a variation of illumination device 300C, and uses two light distribution lenses 325D.
  • the two light distribution lens 325D has two convex lens regions formed on the light incident surface side (light source 322 side), and the light exit surface side is flat.
  • the light ray B 51 heading from the light source center 322C to the top of the reflecting mirror 324D becomes a reflected light ray B 52 , a light ray B 53 after entering the two light distribution lenses 325D, and a light ray B 54 after exiting the two light distribution lenses 325D. Therefore, it can be used effectively.
  • the illuminance at the center of the illuminance distribution was low, but in the two-light distribution lens 325D having two convex lens areas, the center distance between the two convex lens areas can be changed as shown in Embodiment 1.
  • the light distribution can be optimized by changing the focal length of the convex lens region, or by increasing the light diffusivity due to the grain shape or the like.
  • a lighting device 300G whose principal part is shown in cross-section in FIG. 15 is a variation of the lighting device 300, and uses a two-light distribution lens 325G.
  • the two-light distribution lens 325G has a shape obtained by bending the two-light distribution lens 325, and the optical axis RX (1) of the left convex lens region 325G (1) and the optical axis RX (2) of the right convex lens region 325G (2) are It passes near the light source center 322C of the light source 322 and is oblique to the optical axis of the light source.
  • the light incident surface of the two-light distribution lens 325G may be bent as shown in the figure, but may also be a flat or curved surface.
  • Illumination device 300F a cross-sectional view of a main part shown in FIG. 16, is a variation of illumination device 300, and uses two light distribution lenses 325F.
  • a left convex lens area 325F(1) and a right convex lens area 325F(2) have a Fresnel lens shape as shown in the figure. This allows the lens to be made thinner and lighter.
  • a diffusing shape such as a grain shape for preventing color unevenness may be superimposed on the Fresnel lens shape. Note that since providing both a Fresnel lens shape and a diffusion shape results in a very complicated shape, for example, a Fresnel lens shape may be provided on the light exit surface side, and a textured shape may be provided on the light incidence surface side.
  • a two-light distribution lens 325E which is a two-light distribution optical element, is detachably attached to the illumination device 300E in an installed state.
  • Various methods can be considered for attaching and detaching only the two light distribution lenses 325E without removing the illumination device 300E, but as an example, as shown in FIG.
  • a mounting portion 325E(5) is provided on the mounting portion 325E(5), and the screw fixing portion 325E(6) provided on the mounting portion 325E(5) is fitted into the two screws 328 provided on the front surface 327E of the lighting device 300E to fix it.
  • the screw fixing portion 325E(6) provided on the mounting portion 325E(5) is fitted into the two screws 328 provided on the front surface 327E of the lighting device 300E to fix it.
  • the two-light distribution lens 325E can be removed and replaced with another two-light distribution lens to obtain the desired light distribution characteristics. . Therefore, after installing the lighting device 300E, only the two light distribution lenses 325E can be replaced to obtain light distribution characteristics according to the purpose.
  • a frame provided with a screw may be used, a groove matching the frame may be provided on the front surface of the lamp body on the receiving side, and the lens may be fixed with the frame.
  • a mount may be provided on the lighting device side, and a lens fixed to a frame may be attached to the mount.
  • FIG. 18 is a simulation diagram when a hallway is illuminated by the lighting device 300E.
  • a lighting device 300E which is a downlight with a fixed light distribution direction, is installed on a ceiling 390E of a hallway, and illuminates a hallway wall 385EL, a hallway wall 385ER, and a hallway floor 380E.
  • the lighting device 300E Since the lighting device 300E has a light distribution characteristic that mainly distributes light with the light distribution BL on the left side and the light distribution BR on the right side, the walls on both sides become brighter, and pedestrians can feel that the hallway is brighter. Therefore, a device with a small total luminous flux can be used as the lighting device 300E, resulting in energy savings.
  • the removable two-light distribution lens 325E can be replaced with an appropriate one depending on the width of the hallway and the height of the ceiling.
  • FIG. 14(a) is a plan view of the two-light distribution lens 325U viewed from the light exit surface side
  • FIG. 14(b) is a cross-sectional view taken along the line AA.
  • the upper surface (light exit surface) of the two light distribution lenses 325U includes a left convex lens area 325U (1) on one side (left side) in the x direction, a right convex lens area 325U (2) on the other side (right side), and a right convex lens area 325U (2) on the other side (right side). It is divided into a first scattering area 325U (3) and a second scattering area 325U (4).
  • the left convex lens area 325U (1) and the right convex lens area 325U (2) each have a convex lens having a virtual contour indicated by a dotted line cut out by the contour of the two light distribution lenses 325U, and are areas that do not overlap with other convex lens areas. This is the area up to the center line V.
  • the left convex lens area 325U(1) and the right convex lens area 325U(2) are symmetrical with respect to the center line V.
  • the left convex lens area 325U (1) and the right convex lens area 325U (2) are provided in the x direction (one direction).
  • a plurality of linear convex portions 325U(2)s along the y direction (other direction) are provided.
  • FIG. 19(b) which is a cross-sectional view taken along the axis J2
  • the light rays B y1 and B y2 traveling in the z direction are slightly refracted in the y direction by the convex portion 325U(2)s, and as a result, the light rays is diffused in the y direction.
  • the light incidence surface 325U(0) which is the lower surface of the two-light distribution lens 325U, is a flat surface as shown in FIG. 19(b).
  • FIG. 20 shows the simulation results of the illuminance distribution at a distance of 2.8 m from the light source when the total luminous flux of the light source is 1000 lm.
  • the numerical values in the figure are illuminance (lx).
  • illuminance lx
  • FIG. 5(b) it can be seen that the light spreads in the y direction (vertical direction in the figure) and the illuminance value decreases accordingly.
  • FIG. 21 shows simulation results of the light distribution characteristics of the lighting device 300U.
  • the illumination device 300U two light distributions are strongly distributed in the direction of 20 degrees with respect to the center, and the luminous intensity in the center direction is 3% of the luminous intensity in the peak direction of the light distribution, and the light distribution in the 0 degree direction is small.
  • a plurality of concave portions may be used instead of the plurality of convex portions 325U(2)s along one direction.
  • One direction does not have to be exactly the same direction, and is not limited to the x direction.
  • the illumination device 300W of this embodiment is obtained by changing the two-light distribution lens 325 of the first embodiment to a two-light distribution lens 325W, and provides bright illumination in a relatively narrow area and illumination of a certain brightness in a relatively wide area. This is achieved with a single lighting device.
  • FIG. 22 shows a plan view of the two-light distribution lens 325W viewed from the light exit surface side.
  • the upper surface (light exit surface) of the two light distribution lenses 325W includes a left convex lens area 325W (1) on one side (left side) in the x direction, a right convex lens area 325W (2) on the other side (right side), and a right convex lens area 325W (2) on the other side (right side). It is divided into a first scattering area 325W (3) and a second scattering area 325W (4).
  • the left convex lens area 325W (1) and the right convex lens area 325W (2) each have a convex lens having a virtual contour indicated by a dotted line cut out by the contour of the two light distribution lens 325U, and are areas that do not overlap with other convex lens areas. This is the area up to the center line V.
  • the left convex lens region 325W(1) and the right convex lens region 325W(2) are symmetrical with respect to the center line V.
  • the light scattering shapes on the surfaces of the left convex lens region 325W(1) and the right convex lens region 325W(2) are made different.
  • the left convex lens area 325W(1) has the same grain shape as the left convex lens area 325(1).
  • the right convex lens region 325W(2) is provided with a plurality of linear convex portions 325U(2)s arranged in the y direction along the same x direction as the right convex lens region 325U(2).
  • FIG. 23 shows the simulation results of the illuminance distribution at a distance of 2.8 m from the light source when the total luminous flux of the light source is 1000 lm.
  • the numerical values in the figure are illuminance (lx).
  • the left side is a relatively circular illumination area, and the right side is a vertically elongated illumination area due to scattering by the plurality of convex portions 325U(2)s.
  • FIG. 24 shows simulation results of the light distribution characteristics of the lighting device 300U.
  • the lighting device 300U two types of light are strongly distributed in directions 15° to the left and 20° to the right with respect to the center, and the luminous intensity in the central direction is 22% of the luminous intensity in the peak direction of the light distribution.
  • a two-light distribution prism 125 is used as the two-light distribution optical element.
  • FIG. 26(a) shows a sectional view of a main part of the lamp body 120 of the lighting device 100 of this embodiment.
  • the two-light distribution prism 125 has a left light distribution region 125L whose entrance surface is a flat surface and whose exit surface is an inclined plane forming an angle with the entrance surface, and an exit surface.
  • the right light distribution region 125R is an inclined plane that makes an angle with the incident surface.
  • the two-light distribution prism 125 functions as a prism depending on the angle formed between the exit surface and the entrance surface.
  • the light rays B P1 and B P2 emitted from the light source 122 enter the two-light distribution prism 125, change their traveling direction away from the optical axis AX, and emit to the outside.
  • the light beam B P3 emitted from the light source 122 is reflected by the reflecting mirror 124, enters the two-light distribution prism 125, changes its traveling direction away from the optical axis AX, and emits to the outside.
  • a two-light distribution Fresnel prism 225 is used as the two-light distribution optical element.
  • FIG. 27(a) shows a sectional view of a main part of the lamp body 220 of the lighting device 200 of this embodiment.
  • the two-light distribution Fresnel prism 225 has a left light distribution region 225L, which has a flat exit surface and a plurality of inclined planes whose entrance surface forms an angle with the exit surface.
  • a right light distribution region 225R consisting of a plurality of inclined planes whose exit surface makes an angle with the entrance surface.
  • the two-light distribution Fresnel prism 225 functions as a prism depending on the angle formed between the exit surface and the entrance surface, and its cross section is approximately sawtooth-shaped to keep the thickness thin so that it does not become thick like a Fresnel lens. . Therefore, the two-light distribution Fresnel prism 225 is lighter in weight than the two-light distribution prism 125.
  • the number of inclined planes may be any number, and although the number of inclined planes in Fig. 27 is much smaller than that of the prototype for illustration purposes, the actual number of inclined planes is about this number (8 planes on one side). It may be better, or it may be less.
  • the light beams B FP1 and B FP2 emitted from the light source 222 enter the two-light distribution Fresnel prism 225, change their traveling directions away from the optical axis AX, and emit them to the outside.
  • the light beam B FP3 emitted from the light source 222 is reflected by the reflecting mirror 224, enters the two-light distribution Fresnel prism 225, changes its traveling direction away from the optical axis AX, and emits to the outside.
  • By distributing light in different directions in the left light distribution area 225L and the right light distribution area 225R stronger light intensity can be obtained in two directions different from the optical axis direction in the lighting device 200 than in the optical axis direction. Light distribution can be realized.
  • a two-light distribution multiprism 425 is used as the two-light distribution optical element.
  • FIG. 28(a) shows a sectional view of a main part of the lamp body 420 of the lighting device 400 of this embodiment.
  • the two-light distribution multiprism 425 has a flat exit surface, and a plurality of inclined surfaces 425R and 425L, in which the entrance surface makes an angle with the exit surface, are alternately repeated. It consists of different patterns.
  • the two-light distribution multi-prism 425 functions as a multi-prism depending on the angle formed between the inclined surface 425R or the inclined surface 425L and the exit surface, and is kept thin. Therefore, the two-light distribution multi-prism 425 is lighter in weight than the two-light distribution prism 125.
  • the number of inclined planes may be any number, and although the number of inclined planes in Fig. 28 is drawn much smaller than that of the prototype for ease of illustration, the number of inclined planes may actually be around this level. It may be less.
  • ray B MPL1 that goes to the left
  • ray B MPR3 that goes to the right side.
  • one surface is a flat surface, but this flat surface may be a curved surface in the shape of a convex lens to provide a convex lens effect. This has the effect of increasing light gathering ability. Furthermore, in the ninth embodiment, when the light exit surface is a curved surface in the shape of a convex lens, it becomes similar to, for example, the two-light distribution lens 325 shown in the first embodiment.
  • a light scattering shape such as the grain shape for light scattering described above may be formed on at least one of the light exit surface or the light incidence surface. This reduces color unevenness and light intensity unevenness in the illumination light.
  • a universal downlight is used as a lighting device that can continuously change the angle between two light distributions by continuously changing the distance H from the light source to the light distribution lens.
  • FIG. 29 shows a sectional view of essential parts of the lighting device 500 of this embodiment. It includes a frame 510, a lamp fixing part 530 fixed to the frame 510, a lamp 520 rotatably fixed to the lamp fixing part 530, and the same power source as in Embodiment 1 (see FIG. 1).
  • FIG. 30 shows an external view of a lamp body 520, which is a main part of the lighting device 500 of this embodiment.
  • the lamp body 520 includes a heat sink 521 , a light source 522 that is a COB type LED attached to the heat sink 521 (explained in a cross-sectional view below), a lens barrel 523 , and a two-light distribution lens 525 attached to the lens barrel 523 .
  • the lens barrel 523 is attached to the lamp body fixing part 530 so that the rotation in the axial direction of the lamp body and the inclination of the axis are variable.
  • the lighting device 500 mainly emits light in the BL direction and light in the BR direction.
  • a slit 533 and a fixing screw 534 are provided on the front side of the lens barrel 523 and on the back side that cannot be seen in this figure.
  • the fixing screw 534 is attached to a screw receiver 536 integrated with the heat sink 521 so as to tighten the lens barrel 523, thereby fixing the positions of the lens barrel 523 and the heat sink 521.
  • the distance H between the lower surface of the dual light distribution lens 525 attached to the lens barrel 523 and the surface of the light source 522 attached to the heat sink 521 is fixed in an adjusted state.
  • FIGS. 31(a), (b), and (c) are cross-sectional views of the lamp body 520 when the distances H between the upper surface of the light source 522 and the lower surface of the two light distribution lenses 525 are Ha, Hb, and Hc, respectively. Note that only one fixing screw 534 and one screw receiver 536 for receiving it are shown, and illustration of the slit 533 is omitted.
  • the reflectors include a rear reflector 524L that is movable together with the light source 322, and a front reflector that is movable together with the two light distribution lenses 325. It was divided into two parts of 524U.
  • the height H L along the optical axis AX from the virtual plane including the upper end of the rear reflector 524L to the light source 322 is the height H L along the optical axis AX from the virtual plane including the upper end of the rear reflector 524L to the rear reflector 524L and the two light distribution lenses in the case of FIG. 31(c) where the distance Hc is the shortest. It is preferable that H L ⁇ Hc so that the position of 325 does not interfere.
  • the height H U along the optical axis AX from the virtual plane including the lower end of the front reflector 524U to the lower surface of the two light distribution lenses 325 is the height H U along the optical axis AX of the front reflector 524U in the case of FIG. It is preferable that H U ⁇ Hc so that the positions of 524U and light source 322 do not interfere with each other, and if there is an obstacle to front reflecting mirror 524U, such as a light source holder or a stand of a reflecting mirror, in the vicinity of light source 322, It is preferable that H'c be the distance from the object to the two light distribution lenses 325, and be less than or equal to H U ⁇ H'c.
  • the sum of the height HL of the rear reflector 524L and the height HU of the front reflector 524U is equal to or greater than the distance Ha, which is the maximum value of the distance H, as shown in FIG. 31(a). You can.
  • the basic design is such that the reflective surfaces of the front reflector 524U and the rear reflector 524L are continuous when the distance H is maximum Ha, but the reflector has a thickness. Therefore, the upper end 524U2 of the reflective surface of the front reflective mirror 524U is located slightly outside of the optical axis AX than the upper end 524L1 of the reflective surface of the rear reflective mirror 524L.
  • the rear reflecting mirror 524L comes to be inside the area surrounded by the front reflecting mirror 524U. Further, the heat sink 521 comes to fit inside the lens barrel 523.
  • FIG. 32 shows calculation results of the light distribution characteristics of the lighting device 500 of this embodiment when the distances H are Ha, Hb, and Hc, respectively.
  • the angle between the two light distributions is 40° (20° left and right with respect to the optical axis AX) in Fig. 32(a), 48° (24° left and right with respect to the optical axis AX) in Fig. 32(b), and 52° ( 26° left and right).
  • the lighting device 500 is a universal downlight whose direction of the light body can be changed, but it may be a downlight whose direction of the light body cannot be changed. Even in that case, it can be installed in a hallway and used to illuminate two opposing walls with one lighting device, or a downlight can be installed between two shelves in a store and used to illuminate two opposing walls with one lighting device. It can be suitably used to illuminate both shelves.
  • FIGS. 33(a) and 33(b) show cross-sectional views of the light body 520B when the rear reflector 524L and front reflector 524U in the light body 520 of the lighting device 500 are replaced with the rear reflector 524BL and front reflector 524BU. ) and (c).
  • the rear reflector 524BL is such that when the distance Hc is the minimum value of the distance H, the light RX that is emitted from the light source center 522C of the light source 522 and passes through the upper end of the rear reflector 524L is at the right end of the light distribution lens 525. - Designed to reach all the way to the left edge ( Figure 33(c)). Therefore, the light distribution characteristic in the case of the distance Hc approaches that of the second embodiment in which the reflecting mirror is not divided, and the angle between the two light distributions increases.
  • the slope of the reflective surface of the front reflective mirror 524BU becomes steep and is not continuous with the reflective surface of the rear reflective mirror 524BL, but the influence thereof is limited.
  • the height HL of the rear reflector and the front reflector 524U are exemplified by the rear reflector 524L and 524BL.
  • the height H U of the front reflecting mirror exemplified by 524BU is equal to or shorter than Hc when the distance H is the minimum.
  • the sum of the heights H U and H L is preferably equal to or longer than Ha when the distance H is maximum.
  • the distance H can be changed manually, but in this embodiment, the distance H can be changed using a motor. In that case, even after the lighting device is installed, it becomes possible to change the angle between the two light distributions by changing the distance H.
  • FIG. 34 shows an external view of the lamp body 520V, which is the main part of the lighting device 500V of this embodiment.
  • the lamp body 520V includes a heat sink 521, a light source 522 which is a COB type LED attached to the heat sink 521 (explained in a cross-sectional view below), a lens barrel 523, and a two-light distribution lens 525 attached to the lens barrel 523.
  • the lens barrel 523 is attached to the lamp body fixing part 530 so that the rotation in the axial direction of the lamp body and the inclination of the axis are variable.
  • the lighting device 500 mainly emits light in the BL direction and light in the BR direction.
  • the lamp body 520V includes a motor 551 fixed to the heat sink 521, a feed screw shaft 552 that transmits the rotation of the motor 551 and has a screw at its tip, and a screw receiver 553 that receives the tip of the feed screw shaft 552.
  • the screw receiver 553 is attached to the lens barrel 523, and when the motor rotates, the feed screw shaft 552 rotates, so the screw receiver 553 and the lens barrel 523 move back and forth with the guide pin 535 in the slit 533, and the light source
  • the distance H between the surface of the lens 522 and the lower surface of the two light distribution lenses 525 can be changed.
  • the motor 551 is controlled using a lighting control device 570V, which is a modification of the lighting control device 370 shown in FIG.
  • FIG. 35 shows a touch panel that is an interface of the lighting control device 570V.
  • the installed lighting control software 571 can display a two-light distribution angle interface 573A in addition to a color adjustment interface 573C and a dimming interface 573B.
  • the angle interface 573A between the two light distributions can be changed by moving the set point 574A2 on the slide bar 574A1 (minimum 30° and maximum 60° in the figure), and the set angle is displayed as the setting angle. 574A3 (in the figure, the angle between the two light distributions is 45 degrees).
  • the color temperature can be changed by moving the set point 574C2 on the slide bar 574C1 (minimum 2700K, maximum 6500K in the figure), and the set color temperature is displayed on the set color temperature display 574C3 (in the figure 6500K).
  • the dimming rate can be changed by moving the setting point 574B2 on the slide bar 574B1 (minimum 0% and maximum 100% in the figure), and the set dimming rate is displayed in the setting dimming rate display 574B3 ( In the figure, it is displayed as 80%).
  • the lighting device 700 of this embodiment is a spotlight that can continuously change the angle between two light distributions.
  • the lighting device 700 includes a light body 720 consisting of a rear light body 720L and a front light body 720U, and the distance between the rear light body 720L and the front light body 720U is With the distance changed, the mounting screw 734 protruding through the slit 733 can be tightened to fix the distance between the two lamp bodies. Thereby, as shown in FIG. 36(b), the intermediate light body 720E between the rear light body 720L and the front light body 720U becomes visible.
  • the rear lamp body 720L is connected to an arm 730 so as to be rotatable in the ⁇ direction, and the arm 730 is connected to a power source 740 so as to be rotatable in the ⁇ direction, so that the direction of the lamp body 720 can be changed.
  • the power source 740 can be removably fixed to the writing rail 790 through the connecting portions 746 and 747 by turning the lever 745.
  • the lighting device 700 can be dimmed and colored by a lighting control device 770 (smartphone, tablet, personal computer, etc.) in which lighting control software 771 is installed.
  • FIG. 37 is a sectional view showing the inside of the lamp body 720.
  • the left The angle ⁇ of the light distribution BL in the diagonal direction and the light distribution BR in the right diagonal direction (angle ⁇ between two light distributions) can be changed.
  • the rear lamp 720L includes a heat sink 721, a light source 722 attached to the heat sink 721, and a rear reflector 724L, and is provided with a slit 733 shown in FIG. 36.
  • the front lamp 720U includes an intermediate lamp 720E, a mounting screw 734 attached to the intermediate lamp 720E, a front reflector 724U, and two light distribution lenses 725.
  • the distance between the rear light body 720L and the front light body 720U is shortened, and the distance between the light source 722 and the two light distribution lenses is shortened, and the rear reflector 724L is It goes into the space surrounded by the front reflector 724U. This makes it possible to change the angle ⁇ between the two light distributions.
  • a multi-prism 726 which is an optional filter, is attached to a lamp body 720 in a lighting device 700.
  • FIG. 38 is a sectional view showing the inside of a lighting body 720F, which is a lighting body to which a multi-prism 726 is attached.
  • the distance H between the light source 722, which is a part of the rear lamp body 720L, and the lower surface of the two-light distribution lens 725, which is a part of the front lamp body 720U, is calculated from Ha in FIG. 38(a) to Hc in FIG. 38(c).
  • the angle ⁇ of the light distribution BL in the left diagonal direction and the light distribution BR in the right diagonal direction can be changed from ⁇ a to ⁇ c.
  • the multi-prism 726 uses the incident surfaces 726L and 726R, which are refracting surfaces, to direct the light distribution BL to BL1 further to the left, BL2 to the center, BR1 to direct the light distribution BR to the center, and BR2 to direct the light distribution BR further to the right. It is decomposed into Therefore, compared to the case without the multi-prism 726, the light distribution is spread laterally and the light is directed toward the center as well.
  • FIG. 39(a) shows the illuminance distribution on the wall when the light from the lamp 720 (without the multi-prism 726) is applied to the wall 785
  • FIG. 39(b) shows the lamp with the multi-prism 726 attached to the lamp 720.
  • the illuminance distribution on the wall surface when the wall 785 is irradiated with 720F light is shown. It can be seen that while the light from the lamp 720 has a light distribution divided into two directions, the light from the lamp 720F has changed to a horizontally elongated light distribution with less drop in light intensity toward the center.
  • the lighting device 900 of this embodiment is a spotlight that can continuously change the angle between two light distributions.
  • FIG. 40 is a sectional view showing the inside of the lamp body 920.
  • light emitted from the light source center 922C of the light source 922 and heading to the left passes through the left light distribution area 925L of the two-light distribution Fresnel prism 925, and becomes a light ray BL heading further to the left.
  • the light emitted from the light source center 922C of the light source 922 and heading to the right passes through the right light distribution area 925R of the two-light distribution Fresnel prism 925 and becomes a light ray BR heading further to the right.
  • the distance H between the light source 922, which is a part of the rear lamp body 920L, and the two-light distribution Fresnel prism 925, which is a part of the front lamp body 920U, is shown in FIG. 40(a) to Hc in the case of FIG. 40(c)
  • the angle ⁇ between the light distribution BL in the left diagonal direction and the light distribution BR in the right diagonal direction (the angle between the two light distributions) ⁇ ) can be changed from ⁇ a to ⁇ c.
  • the aperture of the front part of the rear reflector 924L is widened so that the light from the light source 922 can use the entire area of the two-light distribution Fresnel prism 925 even when the distance H becomes small as Hc. are doing. Accordingly, the front reflecting mirror 924U is made into a cylindrical shape so as not to interfere with the position of the rear reflecting mirror 924L.
  • FIGS. 41(a) and 41(b) show the calculation results of light rays when the distance H between the light source center 922C and the two-light distribution Fresnel prism 925 (diameter D) is changed to be long or short.
  • the refractive index of the Fresnel prism was 1.49 (assuming acrylic)
  • the angle between the incident surface and the exit surface was 40 degrees
  • the thickness of the Fresnel prism was sufficiently small (the structure is shown in a large size in the diagram). (However, the thickness cannot be seen in this figure).
  • FIG. 41 it can be seen that by changing H, the angle between the two light distributions changes.
  • the COB type LED light source 322 is a white LED in which a plurality of blue LED chips whose light emitting layers are made of InGaN are arranged on a substrate, and the top and side surfaces of the blue LED chips are covered with a phosphor-containing resin.
  • the COB LED light source 322 may be an LED with a fixed emitted color, but the light emitting area is divided into two areas, the first area is white with a high color temperature, and the second area is white with a low color temperature. It may be possible to emit white light and to be able to individually control the amount of light emitted in the first region and the second region.
  • COB type LED light source instead of a COB type LED light source, for example, use a CSP type LED light source in which a high color temperature white LED CSP (Chip Scale Package) with a color temperature of 6500K and a low color temperature white LED CSP with a color temperature of 3000K are arranged on a substrate. Good too.
  • a CSP type LED light source in which a high color temperature white LED CSP (Chip Scale Package) with a color temperature of 6500K and a low color temperature white LED CSP with a color temperature of 3000K are arranged on a substrate. Good too.
  • each LED used in the CSP type LED light source three color LEDs, such as a blue-white LED (Bw), a red LED (R), and a yellow-white LED (Yw), may be used.
  • Bw blue-white LED
  • R red LED
  • Yw yellow-white LED
  • a blue-white LED is an InGaN-based blue LED chip whose top and side surfaces are covered with resin containing green phosphor particles or yellow phosphor. In addition, it may further contain red phosphor particles.
  • the yellow-white LED has an InGaN-based blue LED chip placed at the bottom of the package, and the top and side surfaces of the InGaN-based blue LED chip are covered with a resin containing green phosphor particles or yellow phosphor.
  • the concentration of the phosphor is higher than that of Bw.
  • it may further contain red phosphor particles.
  • a red LED (R) is an InGaN-based blue LED chip whose top and side surfaces are covered with a resin containing red phosphor particles.
  • an AlGaInP LED chip may be used instead of the InGaN blue LED chip, and the LED chip may be covered with a resin that does not contain phosphor.
  • An LED package using an AlGaInP-based LED chip as a red LED (R) is preferable in that the emission spectrum does not include blue, but the driving voltage is different from that of a blue-white LED (Bw) or a yellow-white LED (Yw). Therefore, the drive circuit becomes complicated.
  • processing is required to reduce the blue color included in the emission spectrum.
  • concentration of the red phosphor it is preferable to increase the concentration of the red phosphor to reduce the proportion of light emitted from the blue LED chip to the outside, but a filter that absorbs blue light may also be used.
  • an SMD (Surface Mount Device) type LED surface mount type LED
  • SMD Surface Mount Device
  • surface mount type LED can be particularly preferably used as a light source for a large diameter lighting fixture.
  • the yellow phosphor particles are, for example, (Y 1-x Gd x ) 3 Al 5 O 12 :Ce 2+ (0 ⁇ x ⁇ 1)
  • the green phosphor particles are, for example, Lu 3 Al 5 O 12 :Ce 2+
  • red phosphor such as Sr x Ca 1-x AlSiN 3 :Eu 3+ (0 ⁇ x ⁇ 1) phosphor, Sr[LiAl 3 N 4 ]:Eu 2+ or K 2 SiF 6 :Mn 4+ phosphor can be suitably used.
  • Quantum dots can also be suitably used.
  • FIG. 25 is a chromaticity diagram (chromaticity coordinate diagram) for explaining the chromaticity of a blue-white LED (Bw), a red LED (R), and a yellow-white LED (Yw).
  • Bw blue-white LED
  • R red LED
  • Yw yellow-white LED
  • the line connecting the chromaticities of blackbody radiation is shown as a dotted line. Note that Yw is a color close to yellow on the chromaticity diagram, but when other Bw and R are lit at the same time, it appears to be a color close to green.
  • the blue-white LED (Bw) has CIE1931 chromaticity coordinates of (0.336, 0.24), (0.352, 0.44), (0.15, 0.2), (0. It emits light with a chromaticity within the range of 2, 0.1), for example (0.23, 0.26).
  • the red LED (R) has a chromaticity boundary line E of (0.66, 0.23), (0.423, 0.355), (0.5, 0.5) in the chromaticity coordinates of FIG. It emits light with a chromaticity within the range of (0.60, 0.38) as an example. Please note that this is not the same as the general definition of red.
  • the yellow-white LED (Yw) has chromaticity coordinates of (0.5, 0.5), (0.423, 0.355), (0.342, 0.312), (0.352) in FIG. , 0.44), (0.37, 0.63), and a chromaticity in the range surrounded by the chromaticity boundary line E, for example (0.44, 0.47).
  • d uv be within a positive range from the line connecting the chromaticity of black body radiation at each color temperature, and d uv is particularly within the range of plus 0.03 to 0. suitable.
  • d uv is within the range of plus 0.03 to minus 0.03 from the line connecting the chromaticity of black body radiation at each color temperature. be.
  • RGB red
  • Yw yellow-white
  • Bw blue-white
  • R, Yw, and blue (B) LEDs with chromaticity coordinates of x ⁇ 0.2 and y ⁇ 0.2
  • B blue
  • LEDs of three colors, R, green (G) an LED whose chromaticity coordinates are x ⁇ 0.35, y ⁇ 0.4
  • B blue
  • the lighting device is not limited to a ceiling-embedded universal downlight or a simple downlight, but may also be a spotlight.
  • the lighting device may be a light bulb type LED that can be attached to a light bulb base.
  • the “two-light distribution optical element” in the present invention is a concept including “two-light distribution lens”, “two-light distribution prism”, “two-light distribution Fresnel prism”, “two-light distribution multiprism”, etc.
  • the optical element When the incident light enters, the optical element emits at least obliquely leftward outgoing light and obliquely rightward outgoing light.
  • “2 light distribution lens”, “2 light distribution prism”, and “2 light distribution Fresnel prism” are two area type two light distribution optical elements
  • “2 light distribution multiprism” is a two area mixed type two light distribution optical element. It can be classified as In particular, a two-area type two-light distribution optical element can be suitably used in an illumination device that changes the angle between two light distributions by changing the distance H.
  • a "two-light distribution optical element” for example, a “two-light distribution lens” means a lens that distributes light in at least two directions. Therefore, even a three-light distribution lens or a four-light distribution lens provided with three or four convex lens regions, for example, is included within the scope of the present invention. The same applies not only to the convex lens area but also to the prism area.
  • it may be a three-light distribution optical element that distributes light in three directions: the optical axis direction, a left diagonal direction, and a right diagonal direction with respect to the optical axis, and illumination using such a three light distribution optical element
  • a lighting device that illuminates the left and right walls of a hallway and also ensures illuminance on the floor using light in the direction of the optical axis.
  • the virtual outer shape of the light distribution region such as the convex lens region in the present invention is not limited to a circle, and may be, for example, an ellipse or a rectangle.
  • the virtual outer shape may be a rectangle, and one side of the rectangle may have a cross section of a part of the same cylinder.
  • the shape of the reflecting mirror that reflects the light emitted from the center of the light source in a direction different from the optical axis direction, as illustrated in FIG. 2, is also applicable to the rear reflecting mirror and the front reflecting mirror.
  • the convex lens function and the two-light distribution function of the two-light distribution lens may be separated and performed using one convex lens and two light distribution prisms. These two may be integrated, for example, a two-light distribution optical element having a two-light distribution prism as an entrance surface and a convex lens as an exit surface may be used.
  • scheduled operation can be performed in which the angle between two light distributions is changed according to time.
  • sensor-linked operation can be performed.
  • An example of sensor-linked operation is, for example, when the lighting device of the present invention is used to illuminate a hallway in a hospital, the angle between the two light distributions is normally made small, and when a bed passes by, the angle between the two light distributions is increased using a motion sensor. An example of this would be to reduce the amount of direct downward light that would be dazzling to patients who are lying in bed and looking up.
  • Embodiments 12, 13, 14, and 15 By eliminating the two light distribution optical elements in Embodiments 12, 13, 14, and 15, or by replacing the two light distribution optical elements with a single light distribution optical element such as a general convex lens, concave lens, or diffuser plate, light distribution in one direction can be achieved.
  • the spread of light distribution (light distribution angle) in lighting can be changed, and its basic structure is ⁇ equipped with a rear reflector and a front reflector, and the light distribution can be changed by changing the positions of the light source and the top of the front reflector.'' It can be thought of as "variable light distribution lighting that can change the spread.”
  • the distance H when there is no two-light distribution optical element can be the distance on the optical axis between the light source and the surface including the upper end of the front reflecting mirror.
  • the rear reflector is placed inside the front reflector.
  • Lighting device 120 100, 200, 300, 400, 500, 500V, 700, 900 Lighting device 120, 220, 320, 420, 520, 520B, 520V, 720, 920 Light body 720U, 920U Front light body 720L, 920L Rear light body 720E Intermediate light body 122, 322, 422, 522, 722, 922 Light source 124, 224, 324 Reflector 521, 721 Heat sink 524L, 724L, 924L Rear reflector 524U, 724U, 924U Front reflector 125 2 light distribution prism 225, 925 2 light distribution Fresnel prisms 325, 525, 725 2 light distribution lenses 425 2 light distribution multiprisms 551 Motor 552 Feed screw shaft 553 Screw receiver 370, 570V, 770 Lighting control device 371, 571, 771 Lighting control software

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

Le but de la présente invention est, par rapport à l'éclairage intérieur, de réduire le nombre de dispositifs d'éclairage installés de façon à réduire la gêne d'un plafond. La solution selon l'invention porte sur un dispositif d'éclairage qui comprend : une source de lumière ; et un élément optique de distribution de lumière double ayant deux régions de distribution de lumière. L'élément optique de distribution de lumière double distribue la lumière émise par la source de lumière de telle sorte que la lumière présente un pic d'intensité de lumière dans deux directions différentes qui établissent un angle de distribution de lumière double prédéterminé. L'angle de distribution de lumière double peut être ajusté en changeant la distance entre la source de lumière et une surface inférieure de l'élément optique de distribution de lumière double de telle sorte que la distance possède une valeur entre une valeur minimale et une valeur maximale.
PCT/JP2023/025670 2022-07-15 2023-07-12 Dispositif d'éclairage WO2024014467A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206112651U (zh) * 2016-06-24 2017-04-19 深圳云控照明信息科技有限公司 一种聚泛光可调的变焦照明机构装置
JP2018190503A (ja) * 2017-04-28 2018-11-29 コイズミ照明株式会社 光学素子、及び照明器具
JP2021026158A (ja) * 2019-08-08 2021-02-22 パナソニックＩｐマネジメント株式会社 レンズおよび照明器具

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206112651U (zh) * 2016-06-24 2017-04-19 深圳云控照明信息科技有限公司 一种聚泛光可调的变焦照明机构装置
JP2018190503A (ja) * 2017-04-28 2018-11-29 コイズミ照明株式会社 光学素子、及び照明器具
JP2021026158A (ja) * 2019-08-08 2021-02-22 パナソニックＩｐマネジメント株式会社 レンズおよび照明器具

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