WO2022113857A1 - 照明装置 - Google Patents

照明装置 Download PDF

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Publication number
WO2022113857A1
WO2022113857A1 PCT/JP2021/042308 JP2021042308W WO2022113857A1 WO 2022113857 A1 WO2022113857 A1 WO 2022113857A1 JP 2021042308 W JP2021042308 W JP 2021042308W WO 2022113857 A1 WO2022113857 A1 WO 2022113857A1
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WO
WIPO (PCT)
Prior art keywords
light
tubular member
lighting device
incident end
functional layer
Prior art date
Application number
PCT/JP2021/042308
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
恒三 中村
宇峰 翁
Original Assignee
日東電工株式会社
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 日東電工株式会社 filed Critical 日東電工株式会社
Priority to JP2022565272A priority Critical patent/JP7704492B2/ja
Publication of WO2022113857A1 publication Critical patent/WO2022113857A1/ja

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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
    • F21S9/00—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply
    • F21S9/02—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply the power supply being a battery or accumulator
    • 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F21Y2105/14—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array
    • F21Y2105/18—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array annular; polygonal other than square or rectangular, e.g. for spotlights or for generating an axially symmetrical light beam
    • 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.
  • a light guide body having at least one light incident surface facing the light source and a light emitting surface substantially orthogonal to the light incident surface, and a prism sheet arranged on the light emitting surface of the light emitting body are provided.
  • the configuration having is disclosed (see, for example, Patent Document 1).
  • Patent Document 1 In the configuration of Patent Document 1, there is room for improvement in lighting over a wide range of space.
  • An object of the present invention is to provide a lighting device capable of illuminating a wide range of a space.
  • the lighting device of the present invention includes a light source and a light guide unit that guides the light emitted by the light source, and the light guide unit includes a tubular member and the cylinder.
  • the tubular member has a light extraction portion that emits the light guided so as to pass through the inside of the wall portion of the shaped member from the inside of the wall portion, and the tubular member faces the light source and has the tubular shape.
  • the wall is provided on either the bottom or the top of the member, and the light is included in a light incident end surface that is incident inside the wall portion and an outer surface of the tubular member that intersects the light incident end surface. It has a light emitting portion from which the light is emitted from the inside of the portion.
  • the lighting device of the present invention has a light source and a light guide portion that guides the light emitted by the light source, and the light guide portion is a curved surface that is a part of a hollow sphere or a rotating ellipse. It has a member and a light extraction portion that emits the light guided so as to pass through the inside of the wall portion of the curved surface member from the inside of the wall portion, and the curved surface member faces the light source.
  • the light is included in the light incident end surface provided at the bottom of the curved surface member and incident on the inside of the wall portion and the outer surface of the curved surface member intersecting the light incident end surface, and the light is emitted from the inside of the wall portion. It has a light emitting unit and a light emitting unit.
  • FIG. 2 is a cross-sectional view taken along the line AA'of FIG. 2A. It is a figure which shows an example of the base part and the light source of the lighting apparatus which concerns on 1st Embodiment. It is a figure of the 1st example of the structure of the light extraction part. It is a figure of the 2nd example of the structure of the light extraction part. It is a figure of the 3rd example of the structure of the light extraction part. It is a figure of the 4th example of the structure of the light extraction part.
  • FIG. 6A is a top view of a configuration example of a tubular member having a light extraction portion of FIG. 6A.
  • FIG. 7A is a cross-sectional view taken along the line BB'in FIG. 7A. It is a figure of the 7th example of the structure of the light extraction part. It is a figure of the 8th example of the structure of the light extraction part. It is a figure of the 9th example of the structure of the light extraction part.
  • FIG. 10 is a diagram of the configuration of a light extraction unit. It is a figure of the eleventh example of the structure of the light extraction part.
  • FIG. 14A is a cross-sectional view taken along the line CC'of FIG. 14A. It is a top view of the configuration example of the lighting apparatus which concerns on 4th Embodiment.
  • FIG. 15A is a cross-sectional view taken along the line DD'in FIG. 15A. It is a top view of the configuration example of the lighting apparatus which concerns on the 1st modification of 4th Embodiment.
  • FIG. 16A is a cross-sectional view taken along the line EE'in FIG. 16A.
  • FIG. 17A is a cross-sectional view taken along the line FF'in FIG. 17A. It is a perspective view of the configuration example of the lighting apparatus which concerns on 5th Embodiment. It is a top view of the configuration example of the lighting apparatus which concerns on 5th Embodiment.
  • FIG. 19A is a cross-sectional view taken along the line GG'. It is a perspective view of the configuration example of the lighting apparatus which concerns on 6th Embodiment. It is a top view of the configuration example of the lighting apparatus which concerns on 6th Embodiment.
  • FIG. 21 is a cross-sectional view taken along the line HH'of FIG.
  • FIG. 21A It is a perspective view of the lighting apparatus which concerns on 1st modification of 6th Embodiment. It is a perspective view of the lighting apparatus which concerns on the 2nd modification of 6th Embodiment. It is a top view of the configuration example of the lighting apparatus which concerns on the 3rd modification of 6th Embodiment.
  • FIG. 23 is a cross-sectional view taken along the line I-I'in FIG. 23A. It is a top view of the configuration example of the lighting apparatus which concerns on 4th modification of 6th Embodiment.
  • FIG. 24A is a cross-sectional view taken along the line JJ'in FIG. 24A. It is sectional drawing of the structural example of the lighting apparatus which concerns on 7th Embodiment. It is sectional drawing of the structural example of the lighting apparatus which concerns on 8th Embodiment.
  • the lighting device has a light source and a light guide unit that guides the light emitted by the light source. Further, the light guide portion passes through the inside of the wall portion of either the cylindrical member or the curved surface member which is a part of the hollow sphere or the spheroid, and either the tubular member or the curved surface member. It has a light extraction unit that emits the light guided so as to be emitted from the inside of the wall portion.
  • the tubular member means a tubular member.
  • the tubular member is not limited to a cylindrical body that is entirely connected in the circumferential direction, etc., and is a cylindrical member in which one end of the plate-shaped member is not connected to the other end, or one in the circumferential direction. Includes tubular members with missing parts.
  • the tubular member includes a cylindrical member having a circular or elliptical cross section orthogonal to the axial direction, and includes a square tubular member having a polygonal cross section orthogonal to the axial direction of the tubular member.
  • tubular member is provided on either the bottom or the top of the tubular member facing the light source, and the tubular member intersects the light incident end surface at which light is incident inside the wall portion and the light incident end surface. It is included in the outer surface of the shaped member and has a light emitting portion from which light is emitted from the inside of the wall portion.
  • the light emitted by the light source enters the inside of the wall portion of the tubular member through the light incident end face and is guided inside the wall portion. A part of the light guided is reflected, scattered, refracted or diffracted toward the outside of the tubular member by the light extraction portion, and passes through the light emitting portion included in the outer surface of the tubular member to pass through the tubular member. It emits light from the inside of the wall portion to the outside.
  • the illuminating device can illuminate the outside of the illuminating device with the light emitted from the light emitting unit.
  • the curved surface member is provided at the bottom of the curved surface member facing the light source, and is included in the light incident end surface at which light is incident inside the wall portion and the outer surface of the curved surface member intersecting the light incident end surface. It has a light emitting unit that emits light from the inside of the.
  • the light emitted by the light source enters the inside of the wall portion of the curved surface member through the light incident end face, and is guided inside the wall portion. A part of the light guided is reflected, scattered, refracted or diffracted toward the outside of the curved surface member by the light extraction portion, passes through the light emitting portion included in the outer surface of the curved surface member, and the wall portion of the curved surface member. It emits light from the inside to the outside.
  • the illuminating device can illuminate the outside of the illuminating device with the light emitted from the light emitting unit.
  • the use, installation location, and lighting object of the lighting device according to the embodiment are not particularly limited, but the lighting device can be installed on, for example, a desk, a table, a shelf, or its surroundings (including the floor, wall surface, and ceiling of a living room). It can be used as a space lighting device for illuminating a desk, a table, the inside or outside of a shelf, the space around them, or the inside of a living room. It can also be used as ceiling lighting by installing it on the ceiling. It can also be used as a footlight to illuminate the floor surface by installing it on the side wall or ceiling of the aisle. It can also be used as indirect lighting by illuminating the side wall or ceiling side. It can also be installed outdoors and used as outdoor lighting to illuminate the surrounding space.
  • the width direction when the lighting device 100 is viewed from the front side is the X-axis direction
  • the depth direction is the Y-axis direction
  • the height direction is the Z-axis direction.
  • the X-axis direction, the Y-axis direction, and the Z-axis direction do not limit the direction of the lighting device 100, and the direction of the lighting device 100 may be any direction.
  • FIG. 1 is a perspective view illustrating an example of the configuration of the lighting device 100.
  • 2A is a top view illustrating an example of the configuration of the lighting device 100, and
  • FIG. 2B is a cross-sectional view taken along the line AA'of FIG. 2A.
  • the top view of FIG. 2A is a view of the lighting device 100 as viewed from the positive direction side of the Z axis.
  • the lighting device 100 has a base portion 3, a light source 1, and a light guide portion 300. Further, the light guide unit 300 has a tubular member 2.
  • the base portion 3 is composed of a material such as resin, metal, or wood, and is a plate-shaped member for fixing the light source 1 and the tubular member 2 in the light guide portion 300.
  • the base portion 3 fixes the tubular member 2 in contact with the flat surface portion of the base portion 3 with an adhesive or the like.
  • a substantially circular groove portion 31 is formed on the flat surface portion of the base portion 3, and the base portion 3 fixes the light source 1 on the bottom surface of the groove portion 31.
  • the base portion 3 includes wiring on which various electric elements such as LEDs (Light Emitting Diodes) can be mounted.
  • the light source 1 includes a plurality of LEDs 11.
  • the plurality of LEDs 11 are arranged so as to draw a substantially circular shape along the groove portion 31, and each of them is fixed on the bottom surface of the groove portion 31.
  • Each of the plurality of LEDs 11 is electrically connected to the drive circuit 12 via the wiring provided in the base portion 3, and the drive voltage is applied from the drive circuit 12 to emit light.
  • the light source 1 can emit an annular light formed by the light emitted by the plurality of LEDs 11.
  • the light emitted by the light source 1 may be white light or monochromatic light.
  • various types of white light such as light bulb color, daylight white, and daylight color can be selected.
  • the configuration of the light source 1 is not limited to the one provided with the LED 11.
  • the light source 1 may be provided with a fluorescent lamp or a cold cathode tube formed in a substantially annular shape, or may be provided with a plurality of optical fibers bundled so that the emission ends form a substantially circular shape.
  • the drive circuit 12 is supplied with a power supply voltage from a battery composed of various secondary batteries (for example, a lithium ion battery, a lithium polymer battery, etc.) or a commercial power source, and applies the drive voltage of the LED 11 to the light source 1.
  • the drive circuit 12 may be provided separately from the base portion 3 or may be provided integrally with the base portion 3.
  • the tubular member 2 included in the light guide unit 300 is a cylindrical member having a cylindrical shaft 20 substantially parallel to the Z axis.
  • the tubular member 2 includes a wall portion 22 that serves as a side wall of the cylindrical member, and guides light so as to pass through the inside of the wall portion 22.
  • the tubular member 2 is a transparent member having transparency to visible light.
  • the visible light transmittance of the tubular member 2 is 60% or more, 65% or more, 70% or more, 75% or more, 80% or more, 85% or more, or 90% or more.
  • the visible light transmittance is specified as an average value of the transmittance at each wavelength when measured at a measurement wavelength of 380 nm or more and 780 nm or less using a spectrophotometer.
  • Such a tubular member 2 can be manufactured by molding a resin material.
  • the resin material include PMMA (Polymethylmethacrylate).
  • PMMA Polymethylmethacrylate
  • the tubular member 2 can be configured by including a glass material. A colored material may be used as long as it is transparent to visible light.
  • the processing method is not limited to resin molding, and bending processing, cutting processing, or the like can also be applied.
  • the base portion 3 is provided with a groove portion 31 on a flat surface portion, and the LED 11 included in the light source 1 is fixed to the bottom surface of the groove portion 31. Further, the base portion 3 fixes the tubular member 2 so as to close the open portion of the groove portion 31 at the end portion of the wall portion 22 that intersects the cylindrical shaft 20.
  • the tubular member 2 is provided at the bottom portion (end portion on the negative direction side of the Z axis) of the tubular member 2 facing the light source 1, and the light incident end surface on which the light emitted by the light source 1 is incident on the inside of the wall portion 22. 21 is included.
  • the light incident end surface 21 is included in the bottom of the tubular member 2.
  • the light incident end surface 21 is included in the top of the tubular member 2.
  • the bottom of the tubular member 2 is on the negative direction side of the Z axis of the tubular member 2, and the cylinder.
  • the top of the shaped member 2 is on the Z-axis positive direction side of the cylindrical member 2.
  • the bottom portion of the tubular member 2 exists on either the positive or negative direction of the X axis in the tubular member 2.
  • the top of the tubular member 2 is on the other side of the tubular member 2 in the positive or negative direction of the X-axis.
  • the bottom portion of the tubular member 2 exists on either the positive or negative direction of the Y axis in the tubular member 2, and the cylinder.
  • the top of the shaped member 2 is on the other side of the cylindrical member 2 in the positive or negative direction of the Y axis.
  • one end of the tubular member 2 in the direction along the cylindrical axis 20 corresponds to the bottom, and the other end corresponds to the top.
  • cylindrical member 2 is included in the outer surface 23 of the tubular member 2 that intersects the light incident end surface 21, and has a light emitting portion 231 that emits light from the inside of the wall portion 22.
  • the outer surface 23 is the outer surface of the tubular member 2.
  • the light emitting unit 231 is shown by a thick line for the sake of clarity, but the light emitting unit 231 corresponds to a portion (region) on the outer surface 23 where light is emitted, and is outside. It is not a member provided on the side surface 23.
  • the light guide unit 300 includes a light extraction unit 241 on an inner side surface 24 which is an inner surface of the wall portion 22 in the tubular member 2.
  • the light extraction unit 241 is a component having a function of emitting light guided so as to pass through the inside of the wall portion 22 from the inside of the wall portion 22.
  • the light emitted by each of the plurality of LEDs 11 enters the inside of the wall portion 22 through the light incident end surface 21 and is guided inside the wall portion 22. Inside the wall portion 22, light is guided by repeating total reflection on each of the outer surface 23 and the inner surface 24.
  • a part of the light guided inside the wall portion 22 is reflected, scattered, refracted or diffracted toward the outside of the tubular member 2 by the light extraction portion 241 and passed through the light emitting portion 231 to the wall portion. It emits light from the inside of the 22 toward the outside.
  • the emitted light 232 shown by the alternate long and short dash line in FIGS. 1, 2A and 2B represents the light emitted from the inside of the wall portion 22 toward the outside. As shown in FIGS. 1, 2A and 2B, the emitted light 232 has various directions such as the direction in which the outer surface 23 of the cylindrical member 2 faces from all over the cylindrical member 2 on the outside of the cylindrical member 2. Emit to.
  • the illuminating device 100 can illuminate a wide range of the space around the illuminating device 100 by the emitted light 232.
  • the lighting device 100 Since the emitted light 232 is also emitted in the vertical direction (Z-axis direction) in FIGS. 1, 2A and 2B, the lighting device 100 is not only in the 360-degree direction around the cylindrical axis 20 but also in the vertical direction (Z). Light can also be illuminated in the axial direction). In other words, the lighting device 100 can illuminate not only the direction parallel to the flat surface portion of the base portion 3 but also the direction intersecting the flat surface portion of the base portion 3.
  • FIG. 3 is a diagram showing the base portion 3 and the light source 1 of the lighting device 100.
  • the mounting surface 32 is a surface corresponding to one flat surface portion of the base portion 3, and is a surface on which the end portions of the tubular member 2 abut and the tubular member 2 is mounted.
  • the groove portion 31 is a recess dug from the mounting surface 32 to a predetermined depth, and is a portion formed in an annular shape.
  • the LED 11 is fixed on the bottom surface of the groove portion 31.
  • the cross-sectional shape of the groove of the groove portion 31 is not particularly limited, and may be rectangular or U-shaped, or may include irregularities inside the groove portion 31, but the LED 11 is stably fixed. Therefore, it is preferable that a flat surface portion is included.
  • the form of the light source 1 is not limited to this.
  • the LED may be arranged in an annular housing formed so as to cover the light incident end surface 21 of the cylindrical member 2 and fixing the tubular member.
  • a groove is provided on the upper surface of the annular housing, and the LED is arranged on the bottom of the groove. The light incident end surface 21 of the tubular member 2 can be inserted into the groove portion to fix the tubular member 2 to the annular housing.
  • FIGS. 4A to 11B are partially enlarged views illustrating the detailed configuration of the light extraction unit, respectively.
  • 4A shows a first example
  • FIG. 4B shows a second example
  • FIG. 5A shows a third example
  • FIG. 5B shows a fourth example
  • FIG. 6A shows a fifth example
  • FIG. 6B shows a sixth example.
  • 7A and 7B are views showing an example of the configuration of the tubular member having the light extraction portion of FIG. 6A
  • FIG. 7A is a top view
  • FIG. 7B is a cross-sectional view taken along the line BB'of FIG. 7A. ..
  • FIG. 8A is a seventh example of the detailed configuration of the light extraction unit
  • FIG. 8B is an eighth example
  • FIG. 9A is a ninth example
  • FIG. 9B is a tenth example
  • FIG. 10A is an eleventh example
  • FIG. 10B is a twelfth example
  • 11A shows a thirteenth example
  • FIG. 11B shows a fourteenth example.
  • the light extraction unit 241 included in the light guide unit 300 shown in FIG. 4A has an optical functional layer 243 including an optical cavity 242 inside.
  • the optical functional layer 243 is provided on the inner side surface 24.
  • the optical functional layer means a layer that exerts an optical function.
  • the optical functional layer 243 is a thin layer made of a resin or the like, and is provided by being laminated on the surface of the tubular member 2.
  • the layered member including the optical functional layer 243 is attached to the inner side surface 24 by an adhesive-free lamination method such as microwave surface treatment, or by adhering with an adhesive (including a pressure-sensitive adhesive). be able to.
  • the optical functional layer 243 is formed in a cylindrical shape along the shape of the inner side surface 24.
  • a layer having another function such as a cover layer may be included before and after the optical functional layer 243 in the stacking direction.
  • the material of the optical functional layer 243 and the material of the adhesive for adhering the optical functional layer 243 to the tubular member 2 are refracted with the tubular member 2 in order to suppress refraction and reflection of light at the interface with the tubular member 2. It is preferable that the rates are close. For example, it is preferable to use the same material containing PMMA as the tubular member 2.
  • the optical cavity 242 is an example of a void portion, and the inside is filled with air. However, the optical cavity 242 may be filled with a material having a refractive index lower than that of the optical functional layer instead of air. A plurality of optical cavities 242 are regularly or randomly provided in the optical functional layer 243. The size of the optical cavity 242 can be appropriately selected within a range that can be installed inside the optical functional layer 243.
  • the optical functional layer including the optical cavity is not particularly limited, and for example, International Publication No. 2011/124765, International Publication No. 2011/127187, International Publication No. 2019/087118, International Publication No. 2019/182091
  • the optical functional layer disclosed in the above can be used. These contents are incorporated herein by reference.
  • the first film 2431 in which the pattern is not formed and the second film 2432 in which the desired fine pattern is formed are bonded together by a lamination method, or an adhesive (pressure sensitive adhesive) is used. It is produced by adhering with (including).
  • Laser patterning, direct laser imaging, laser drilling, maskless or maskless laser or electron beam irradiation is used to form a fine pattern on the second film 2432.
  • the material and the refractive index value may be changed by imparting individual characteristics by printing, inkjet printing, screen printing or the like.
  • Micro / nano-dispensing, dosing, direct "writing”, discrete laser sintering, micro-electric discharge machining (micro EDM), micromachining, micromolding, imprinting, embossing and the like can also be used.
  • the light guided through the wall portion 22 of the tubular member 2 passes through the interface between the tubular member 2 and the optical functional layer 243 or is refracted at the interface and is incident on the optical functional layer 243. Then, a part of the light guided in the optical functional layer 243 is totally reflected at the interface between the optical functional layer 243 and the optical cavity 242 and guided toward the light emitting portion 231. Of the reflected light, the light incident on the outer surface 23 at an angle not exceeding the critical angle is emitted from the inside of the wall portion 22 of the tubular member 2 to the outside. The portion of the outer side surface 23 from which light is emitted corresponds to the light emitting portion 231.
  • Light that is not reflected at the interface between the optical functional layer 243 and the optical cavity 242 is guided while repeating total reflection at the interface between the optical functional layer 243 and the outside air. A part of the light is reflected at the interface between the optical cavity 242 and the optical functional layer 243, and is emitted from the inside of the wall portion 22 of the tubular member 2 to the outside. The above reflection is performed in each of the plurality of optical cavities 242 provided in the optical functional layer 243.
  • the light extraction unit 241 can emit light from the light emission unit 231 in the outer surface 23.
  • the angle of the interface between the optical functional layer 243 and the optical cavity 242 is predetermined to be a suitable angle according to the application of the lighting device.
  • the light extraction unit 241a included in the light guide unit 300a shown in FIG. 4B has an optical functional layer 245 containing light scattering particles 244 inside.
  • the optical functional layer 245 is provided on the inner side surface 24.
  • the material and installation method of the optical functional layer 245 are the same as those of the optical functional layer 243 described above.
  • the light scattering particles 244 are particles having a refractive index difference with respect to the material constituting the optical functional layer 245 and having an average particle size of about 0.3 to 5 ⁇ m.
  • the light scattering particles 244 are an example of a light scattering body that scatters the light guided in the wall portion 22.
  • a plurality of light scattering particles 244 are contained in the material constituting the optical functional layer 245.
  • the optical functional layer containing light-scattering particles is not particularly limited, and for example, the optical functional layer disclosed in Japanese Patent Application Laid-Open No. 2013-195811 can be used. These contents are incorporated herein by reference.
  • the average particle size is the volume average particle size, and can be measured by using, for example, an ultracentrifugation type automatic particle size distribution measuring device.
  • the light guided through the wall portion 22 passes through the interface between the tubular member 2 and the optical functional layer 245 or is refracted at the interface and is incident on the optical functional layer 245. Then, a part of the light guided in the optical functional layer 245 is scattered at the interface between the optical functional layer 245 and the light scattering particles 244, and is guided toward the light emitting portion 231.
  • the light incident on the outer surface 23 at an angle not exceeding the critical angle is emitted from the inside of the wall portion 22 of the tubular member 2 to the outside.
  • the portion of the outer side surface 23 from which light is emitted corresponds to the light emitting portion 231.
  • the light that is not scattered at the interface between the optical functional layer 245 and the light scattering particles 244 is guided while repeating total reflection at the interface between the optical functional layer 245 and the outside air.
  • a part of the light is scattered at the interface between the light scattering particles 244 and the optical functional layer 245, and is emitted from the inside of the wall portion 22 of the tubular member 2 to the outside.
  • the above-mentioned scattering is performed by each of the plurality of light scattering particles 244 provided in the optical functional layer 245.
  • the light extraction unit 241a can emit light from the light emission unit 231 in the outer surface 23.
  • the light extraction unit 241b included in the light guide unit 300b shown in FIG. 5A has an optical functional layer 243 including an optical cavity 242 inside.
  • the optical functional layer 243 is provided on the outer surface 23.
  • the material and function of the optical functional layer 243 are the same as those of the optical functional layer 243 in the light extraction unit 241.
  • the portion of the outer side surface 23 provided with the optical functional layer 243 corresponds to the light emitting portion 231.
  • the light extraction unit 241c included in the light guide unit 300c shown in FIG. 5B has an optical functional layer 245 containing light scattering particles 244 inside.
  • the optical functional layer 245 is provided on the outer surface 23.
  • the material and function of the optical functional layer 245 are the same as those of the optical functional layer 245 in the light extraction unit 241a.
  • the portion of the outer side surface 23 provided with the optical functional layer 245 corresponds to the light emitting portion 231.
  • the light extraction unit 241d included in the light guide unit 300d shown in FIG. 6A has an optical cavity 246.
  • the optical cavity 246 is provided in the wall portion 22d of the tubular member 2d.
  • the optical cavity 246 is an example of a void portion, and the inside is filled with air. However, the optical cavity 246 may be filled with a material having a refractive index lower than that of the tubular member 2d, instead of air. A plurality of optical cavities 246 are regularly or randomly provided in the wall portion 22d of the tubular member 2d. The size of the optical cavity 246 can be appropriately selected within a range that can be installed in the wall portion 22d of the tubular member 2d.
  • the method for producing the tubular member 2d is not particularly limited, but for example, a method of winding a film on which a desired fine pattern is formed around the outer surface of the first tubular member 201 to form the second tubular member 202. It may be.
  • a method may be used in which a film having no pattern formed is wound around the inner surface of the second tubular member 202 to form the first tubular member 201.
  • one end of the plate-shaped member formed by laminating the first film in which the pattern is not formed and the second film in which the desired fine pattern is formed is connected to the other end with an adhesive or the like. It may be produced by doing so.
  • the first tubular member 201 is formed from the first film
  • the second tubular member 202 is formed from the second film.
  • the first film and the second film are bonded by a lamination method such as an adhesive-free microwave surface treatment, or an adhesive (including a pressure-sensitive adhesive) is used. It will be done.
  • the first tubular member 201 in which the pattern is not formed and the second tubular member 202 in which the desired fine pattern is formed are bonded together by a lamination method such as an adhesive-free microwave surface treatment.
  • a lamination method such as an adhesive-free microwave surface treatment.
  • it may be produced by adhering with an adhesive (including a pressure-sensitive adhesive).
  • the refractive indexes of the first tubular member 201 and the second tubular member 202 are made substantially equal, and when the adhesive is used for bonding, the refractive index of the adhesive is set to the first tubular member 201. And it is preferable to make it substantially equal to the second tubular member 202.
  • the same method as the above-mentioned method for forming the fine pattern on the second film 2432 can be applied to the formation of the fine pattern on the second tubular member 202. Further, the function of the optical cavity 246 is the same as that of the optical cavity 242 described with reference to FIGS. 4A and 5A.
  • the light extraction unit 241e included in the light guide unit 300e shown in FIG. 6B has light scattering particles 247.
  • the light scattering particles 247 are provided in the wall portion 22e of the tubular member 2e.
  • the light scattering particles 247 are particles having a refractive index difference with respect to the material constituting the tubular member 2e and having an average particle size of about 0.3 to 5 ⁇ m, and emit light guided through the wall portion 22e. This is an example of a light scattering body that scatters light.
  • the light scattering particles 247 are contained in the material constituting the tubular member 2e.
  • the function of the light-scattering particles 247 is similar to that of the light-scattering particles 244 described with reference to FIGS. 4B and 5B.
  • FIGS. 7A and 7B show an example of the configuration of the tubular member 2d having the light extraction unit 241d of FIG. 6A.
  • the tubular member 2d has a first cylindrical member 201 in which a pattern is not formed and a second tubular member 202 in which a desired fine pattern is formed.
  • a film on which a desired fine pattern is formed is wound around the outer surface of the first cylindrical member 201 to form the second tubular member 202.
  • first tubular member 201 and the second tubular member 202 are bonded together by a lamination method such as an adhesive-free microwave surface treatment, or are bonded by an adhesive.
  • the optical cavity 246 is formed by the fine pattern in the second cylindrical member 202 and the surface of the first tubular member 201.
  • the light extraction unit 241f included in the light guide unit 300f shown in FIG. 8A has an optical functional layer 249 including a prism unit 248 on the surface.
  • the optical functional layer 249 is provided on the inner side surface 24.
  • the prism portion 248 is a portion including a fine slope capable of deflecting light.
  • the optical functional layer 249 is preferably made of a material having a refractive index close to that of the tubular member 2 in order to suppress refraction or reflection of light at the interface between the tubular member 2 and the light extraction portion 241f. It can be configured to include the same PMMA as the member 2.
  • a plurality of prism portions 248 are regularly or randomly provided on the surface of the optical functional layer 249. The size of the prism portion 248 and the adjacent spacing can be appropriately selected within a range that can be formed on the optical functional layer 249.
  • the same method as the above-mentioned method for forming a fine pattern on the second film 2432 can be applied to the formation of the prism portion 248 on the optical functional layer 249.
  • the light guided through the wall portion 22 passes through the interface between the tubular member 2 and the optical functional layer 249 or is refracted at the interface and is incident on the inside of the optical functional layer 243. Then, the light is guided in the optical functional layer 249, reflected by the prism portion 248, and guided toward the light emitting portion 231. Of the reflected light, the light incident on the outer surface 23 at an angle not exceeding the critical angle is emitted from the inside of the wall portion 22 of the tubular member 2 to the outside. The portion of the outer side surface 23 from which light is emitted corresponds to the light emitting portion 231. The above reflection is performed by a plurality of prism portions 248 provided on the optical functional layer 249.
  • the light extraction unit 241f can emit light from the light emission unit 231 in the outer surface 23.
  • the angle of the slope in the prism portion 248 is predetermined to be a suitable angle according to the application of the lighting device.
  • the light extraction unit 241 g included in the light guide unit 300 g shown in FIG. 8B has an optical functional layer 251 including the uneven portion 250 on the surface.
  • the optical functional layer 251 is provided on the inner side surface 24.
  • the material of the optical functional layer 251 is the same as that of the optical functional layer 249 described above.
  • the uneven portion 250 is a portion in which a plurality of concave portions or convex portions having a width and height of about 1 to 5 ⁇ m are formed.
  • the uneven portion 250 is randomly formed on the surface of the optical functional layer 251 and scatters the light guided in the optical functional layer 251.
  • the same method as the above-mentioned method for forming a fine pattern on the second film 2432 can be applied to the formation of the uneven portion 250 on the optical functional layer 251. Further, since the uneven portion 250 may have a random rough surface, blasting or the like can be applied.
  • the light guided through the wall portion 22 passes through the interface between the tubular member 2 and the optical functional layer 251 or is refracted at the interface and is incident on the inside of the optical functional layer 251. Then, a part of the light guided in the optical functional layer 251 is scattered at the interface between the optical functional layer 251 and the uneven portion 250, and is guided toward the light emitting portion 231. Of the scattered light, the light incident on the outer surface 23 at an angle not exceeding the critical angle is emitted from the inside of the tubular member 2 to the outside. The portion of the outer side surface 23 from which light is emitted corresponds to the light emitting portion 231. The above-mentioned scattering is performed at each of the plurality of uneven portions 250 provided on the optical functional layer 251.
  • the light extraction unit 241g can emit light from the light emission unit 231 in the outer surface 23.
  • the light extraction unit 241h included in the light guide unit 300h shown in FIG. 9A has an optical functional layer 249 including a prism unit 248 on the surface.
  • the optical functional layer 249 is provided on the outer surface 23.
  • the material and function of the optical functional layer 249 are the same as those of the optical functional layer 249 in the light extraction unit 241f, but in this case, reflection is performed on a surface other than the slope such as a surface 248'which is substantially parallel to the Y axis in the prism unit 248. There will be more light.
  • the portion of the outer surface 23 provided with the optical functional layer 249 corresponds to the light emitting portion 231.
  • the light extraction unit 241i included in the light guide unit 300i shown in FIG. 9B has an optical functional layer 251 including an uneven portion 250 on the surface.
  • the optical functional layer 251 is provided on the outer surface 23.
  • the material and function of the optical functional layer 251 are the same as those of the optical functional layer 251 in the light extraction unit 241 g.
  • the portion provided with the optical functional layer 251 corresponds to the light emitting portion 231.
  • the light extraction unit 241j included in the light guide unit 300j shown in FIG. 10A has a prism unit 252.
  • the prism portion 252 is formed on at least a part of the inner side surface 24.
  • the prism portion 252 is a portion including a fine slope capable of deflecting light.
  • a plurality of prism portions 252 are regularly or randomly provided on the surface of the inner side surface 24. The size of the slope and the adjacent spacing in the prism portion 252 can be appropriately selected within a range that can be formed on the inner side surface 24.
  • the light deflected by the prism unit 252 passes through the light emitting unit 231 and is emitted.
  • the same method as the above-mentioned method for forming the prism portion 248 on the optical functional layer 249 can be applied to the formation of the prism portion 252 on the inner side surface 24. Further, the function of the prism unit 252 is the same as that of the prism unit 248 described with reference to FIGS. 8A and 9A.
  • the light extraction unit 241k included in the light guide unit 300k shown in FIG. 10B has an uneven portion 253.
  • the uneven portion 253 is formed on at least a part of the inner side surface 24.
  • the uneven portion 253 is a portion in which a plurality of concave portions or convex portions having a width and height of about 1 to 5 ⁇ m are formed.
  • the uneven portion 253 is randomly formed on the inner side surface 24 and scatters the light guided in the wall portion 22. The light scattered by the uneven portion 253 passes through the light emitting portion 231 and is emitted.
  • the same method as the above-mentioned method for forming the uneven portion 250 on the optical functional layer 251 can be applied to the formation of the uneven portion 253 on the inner side surface 24. Further, the function of the uneven portion 253 is the same as that of the uneven portion 250 described with reference to FIGS. 8B and 9B.
  • the light extraction unit 241m included in the light guide unit 300m shown in FIG. 11A has a prism unit 252.
  • the prism portion 252 is formed on at least a part of the outer surface 23.
  • the prism portion 252 is the same as the prism portion 252 in the light extraction portion 241j, but in this case, more light is reflected on a surface other than the slope such as a surface 252'which is substantially parallel to the Y axis in the prism portion 252.
  • the portion of the outer surface 23 in which the plurality of prism portions 252 are formed corresponds to the light emitting portion 231.
  • the light extraction unit 241n included in the light guide unit 300n shown in FIG. 10B has an uneven portion 253.
  • the uneven portion 253 is formed on at least a part of the outer surface 23.
  • the uneven portion 253 is the same as the uneven portion 253 in the light extraction portion 241k.
  • the portion of the outer surface 23 in which the plurality of uneven portions 253 are formed corresponds to the light emitting portion 231.
  • a lighting device that illuminates a space such as a room has been known. Further, a configuration is disclosed having a light guide body having at least one light incident surface facing the light source and a light emitting surface substantially orthogonal to the light incident surface, and a prism sheet arranged on the light emitting surface of the light emitting body. ing.
  • the plate-shaped member since the plate-shaped member is used as the light guide, the light cannot be illuminated in a direction other than the direction in which the flat portion of the plate-shaped member faces, or even if it can be illuminated, the flat portion faces. Only a small amount of light can be illuminated compared to the illumination light in the direction. Therefore, there is room for improvement in lighting over a wide area of space.
  • the light guide unit 300 included in the lighting device 100 emits light guided so as to pass through the inside of the cylindrical member 2 and the wall portion 22 of the tubular member 2 from the inside of the wall portion 22. It has a light extraction unit 241 and.
  • tubular member 2 is provided at the bottom of the tubular member 2 facing the light source 1, and the light emitted by the light source 1 is incident on the inside of the wall portion 22 at the light incident end surface 21 and the light incident end surface 21. It is included in the outer surface 23 of the intersecting tubular members 2, and has a light emitting portion 231 that emits light from the inside of the wall portion 22.
  • the light emitted by the light source 1 passes through the light incident end surface 21 and enters the inside of the wall portion 22 in the tubular member 2, and is guided inside the wall portion 22. A part of the light guided is reflected, scattered, refracted or diffracted toward the outside of the tubular member 2 by the light extraction unit 241 and passes through the light emission unit 231 toward the outside from the inside of the wall portion 22. And emit.
  • the lighting device 100 can emit light from all over the tubular member 2 in various directions such as the direction in which the outer surface 23 of the tubular member 2 faces, on the outside of the tubular member 2. can. Since the outer surface 23 of the tubular member 2 faces an orientation of 360 degrees with the cylindrical axis 20 of the tubular member 2 as the central axis, light can be illuminated in a wider range of the space as compared with the conventional case, and the space can be illuminated. It is possible to provide a lighting device capable of illuminating a wide range of.
  • the lighting device 100 has a transparent appearance and a cylindrical shape, it can exhibit excellent designability. Furthermore, it is possible to illuminate a wide space range in various directions without blind spots (spaces not illuminated by light).
  • the specular reflected light from the illuminated surface or the like can be suppressed and the glare can be suppressed. This makes it possible to illuminate a wide area of the space while suppressing glare.
  • the light guide unit 300 having transparency to visible light since the light guide unit 300 having transparency to visible light is used, the other side of the light guide unit can be seen through by the user. This makes it possible to provide a comfortable space without impairing the expansion of the space.
  • the visible light transmittance of the light guide unit 300 including the tubular member 2 and the light extraction unit 241 is preferably 60% or more, 65% or more, 70% or more, 75% or more, 80% or more, 85. % Or more or 90% or more.
  • the visible light transmittance is specified as an average value of the transmittance at each wavelength when measured at a measurement wavelength of 380 nm or more and 780 nm or less using a spectrophotometer.
  • the light emitting unit 231 it is also possible to give anisotropy to the spreading angle of the light emitted from the light emitting unit 231. For example, it is possible to emit light having a large spread angle in the X-axis direction and a small spread angle in the Z-axis direction in FIG. 1 from the light emitting unit 231.
  • the cylindrical member 2 is exemplified as the cylindrical member 2, but the present invention is not limited to this.
  • the tubular member 2 may be a tubular member having a polygonal cross section such as a quadrangle, a triangle, or a hexagon.
  • FIG. 12A, 12B and 12C are perspective views showing an example of the configuration of the lighting device according to the modified example of the first embodiment.
  • 12A is a diagram showing a first modified example
  • FIG. 12B is a diagram showing a second modified example
  • FIG. 12C is a diagram showing a third modified example.
  • the lighting device 100p has a light guide unit 300p.
  • the light guide unit 300p has a tubular member 2p.
  • the tubular member 2p is a tubular member having a quadrangular cross section. With this configuration, the illuminating device 100p can illuminate a wider range of the space outside the tubular member 2p, including four directions in which each surface parallel to the central axis 20p of the tubular member 2p faces.
  • the lighting device 100q has a light guide unit 300q.
  • the light guide unit 300q has a tubular member 2q.
  • the tubular member 2q is a tubular member having a triangular cross section. With this configuration, the illuminating device 100q can illuminate a wider range of the space outside the tubular member 2q, including three directions in which each surface parallel to the central axis 20q of the tubular member 2q faces.
  • the lighting device 100r has a light guide unit 300r.
  • the light guide unit 300r has a tubular member 2r.
  • the tubular member 2r is a tubular member having a hexagonal cross section. With this configuration, the illuminating device 100r can illuminate a wider range of the space outside the tubular member 2r, including six directions in which each surface parallel to the central axis 20r of the tubular member 2r faces.
  • the same effect as that of the lighting device 100 according to the first embodiment can be obtained even with a quadrangle, a triangle, and a hexagon.
  • Various shapes other than the above-mentioned circle, quadrangle, triangle, and hexagon can be applied to the cross section of the tubular member, and the same effect as that of the lighting device 100 can be obtained.
  • any of the light extraction units 241 and 241a to 241n can be applied regardless of the shape of the cross section of the tubular member.
  • the optical functional layer in the light extraction portion is formed in a shape that follows the shape of the outer surface or the inner surface of the tubular member.
  • a low refractive index layer having a low refractive index with respect to the tubular member is provided on at least a part of at least one of the outer surface or the inner surface of the tubular member that guides light.
  • the low refractive index layer may be provided by being formed on at least a part of at least one of the outer surface or the inner surface of the tubular member, or may be provided via an adhesive (including a pressure-sensitive adhesive). It may be provided by being coupled to a tubular member.
  • FIGS. 13A and 13B are diagrams illustrating an example of the function of the low refractive index layer 34 in the lighting device 100s
  • FIG. 13A is a diagram showing the lighting device 100s having a low refractive index layer
  • FIG. 13B is a low refractive index layer. It is a figure which shows the lighting apparatus 100X which concerns on the comparative example which does not have.
  • the lighting device 100s has a light guide unit 300s.
  • the optical functional layer 243, the low refractive index layer 34, and the cover layer 35 are laminated and formed in this order on the surface of the tubular member 2.
  • a layer having another function may be included between the surface of the tubular member 2 and the low refractive index layer 34.
  • the visible light transmittance of the light guide portion 300s having the tubular member 2, the optical functional layer 243, the low refractive index layer 34 and the cover layer 35 is preferably 60% or more, 65% or more, 70% or more, 75%. 80% or more, 85% or more, or 90% or more.
  • the visible light transmittance is specified as an average value of the transmittance at each wavelength when measured at a measurement wavelength of 380 nm or more and 780 nm or less using a spectrophotometer.
  • the low refractive index layer 34 is a layer having a low refractive index with respect to the refractive index of the tubular member 2.
  • the refractive index n1 of the tubular member 2 is around 1.49.
  • the refractive index n2 of the low refractive index layer 34 is preferably 1.30 or less, and more preferably 1.20 or less.
  • the low refractive index layer is not particularly limited, but for example, a low refractive index layer having voids disclosed in International Publication No. 2019/146628 can be used. This content is incorporated herein by reference.
  • the light guided through the wall portion 22 of the tubular member 2 is satisfied with the total reflection condition when the angle of incidence on the low refractive index layer 34 is larger than the critical angle (when the light is incident at a shallow angle). Total reflection is performed at the interface between the wall portion 22 and the low refractive index layer 34.
  • the cover layer 35 is for protecting the tubular member 2, and is preferably one having high transparency to visible light. It may be made of glass, plastic or the like and have an ultraviolet absorbing effect. From the viewpoint of a protective layer, it is better to have high strength, but a thin and flexible layer may be used.
  • the optical functional layer 243 and the cover layer 35 are laminated and formed in this order on the surface of the tubular member 2 included in the light guide portion 300X, and have a low refractive index layer. do not have.
  • foreign matter C such as scratches, dirt, fingerprints, sweat, and dust adheres to the surface of the cover layer 35, among the light guided inside the wall portion 22, the light toward the cover layer 35 side is emitted.
  • Foreign matter C may scatter and leak from the inside of the wall portion 22 to the outside, causing light loss.
  • the low refractive index layer 34 is provided between the cover layer 35 and the tubular member 2, the light guided in the wall portion 22 is as shown in FIG. 13A. , Total internal reflection is performed by the low refractive index layer 34 before reaching the cover layer 35. As a result, it is possible to prevent the light guided through the wall portion 22 from reaching the foreign matter C, prevent light loss due to scratches, stains, fingerprints, etc., and improve the efficiency of light utilization.
  • the above effect can be obtained by providing the low refractive index layer 34 on at least a part of at least one of the outer surface or the inner surface of the tubular member 2. Further, the above effect can be obtained even if the low refractive index layer 34 is provided in the region where the optical functional layer 243 is not provided on at least one of the outer surface or the inner surface.
  • FIGS. 13A and 13B a configuration in which the low refractive index layer 34 is provided on the optical functional layer 243 including the optical cavity 242 is illustrated, but the configuration is not limited thereto.
  • the low refractive index layer 34 can be provided on the optical functional layer 245, 249 or 251 containing the light scattering particles, and the low refractive index layer 34 can also be provided on the prism portion 252 or the uneven portion 253.
  • FIGS. 14A and 14B are views for explaining an example of the configuration of the lighting device 100t
  • FIG. 14A is a top view
  • FIG. 14B is a sectional view taken along the line CC'of FIG. 14A.
  • the lighting device 100t has a light guide unit 300t.
  • the light guide unit 300t has a lid member 4.
  • the lid member 4 is a member arranged on the end surface 25 on the side opposite to the light incident end surface 21 of the tubular member 2.
  • the lid member 4 is a disk-shaped member having a diameter substantially equal to the diameter of the cylinder of the tubular member 2.
  • the arrangement position of the lid member 4 is a cylinder.
  • the wall portion 22 of the shaped member 2 is located on the Z-axis positive direction side, but the arrangement position of the lid member 4 is not limited to this.
  • the arrangement position of the lid member 4 is on the Z axis negative direction side of the wall portion 22. become.
  • the arrangement position of the lid member 4 is on the positive direction side or the negative direction side of the X axis of the wall portion 22. It corresponds to either one or either the positive direction side or the negative direction side of the Y axis of the wall portion 22.
  • Such a lid member 4 is configured to include a material such as resin, glass or metal.
  • the material of the lid member 4 may be the same as or different from that of the tubular member 2.
  • the member is made of a transparent material.
  • the configuration in which the lid member 4 is a disk-shaped member having a diameter substantially equal to the diameter of the cylinder of the tubular member 2 is illustrated, but the present invention is not limited thereto.
  • the lid member 4 may have a diameter larger than the diameter of the cylinder of the tubular member 2, or may have a shape other than a circle such as a rectangle.
  • the member is not limited to a plate-shaped member, and may be a member having a hemispherical shape or the like.
  • FIGS. 14A and 14B the configuration in which the lid member 4 is placed on the end surface 25 of the tubular member 2 is illustrated, but the present invention is not limited to this.
  • the lid member may be arranged so as to cover the end portion of the tubular member 2 on the side opposite to the light incident end surface 21.
  • the lid member 4 may be fixed to the tubular member 2 by adhesion or the like, or may be fixed by fitting when the lid member 4 is put on the end portion of the tubular member 2. Alternatively, the lid member 4 may be simply placed on the end surface 25 and not fixed.
  • the lid member 4 is configured so that the light that guides the inside of the wall portion 22 further guides the inside of the lid member 4 via the joint surface between the wall portion 22 and the lid member 4. Is also good.
  • the lid member 4 may include a light extraction unit as described in the first embodiment in order to emit light that guides the inside of the lid member 4 to the outside.
  • lid member 4 By providing the lid member 4 in this way, for example, it is possible to prevent dust and dirt from entering the inside of the tubular member 2 and improve the aesthetic appearance.
  • FIGS. 15A and 15B are views for explaining an example of the configuration of the lighting device 100u
  • FIG. 15A is a top view
  • FIG. 15B is a sectional view taken along the line DD'of FIG. 15A.
  • the lighting device 100u has a light guide unit 300u.
  • the light guide unit 300u has a tubular member 2u.
  • the tubular member 2u is formed in a tapered shape that becomes thinner as the distance from the light incident end surface 21u increases.
  • the direction away from the light incident end surface 21u corresponds to the Z-axis positive direction in the examples of FIGS. 15A and 15B.
  • a light extraction unit 241u is provided on the inner side surface 24u of the tubular member 2u.
  • the light extraction portion 241u may be provided by forming a prism portion or an uneven portion on at least a part of the inner side surface 24u, or the optical functional layer may be formed via an adhesive (including a pressure-sensitive adhesive). It may be provided by being coupled to the shaped member 2u.
  • the light extraction unit 241u reflects, scatters, refracts or diffracts the light guided in the wall portion 22u of the tubular member 2u toward the outer surface 23u, and passes the light emitting portion 231u from the inside to the outside of the wall portion 22u. Can be emitted to.
  • the cross section of the tubular member 2u is substantially circular
  • it may be a tubular member having a shape other than the substantially circular shape such as a triangle, a quadrangle, or a hexagon.
  • the second and third embodiments can be applied to the lighting device 100u to obtain the same effects as those of the second and third embodiments.
  • the optical functional layer in the light extraction portion is formed in a shape that follows the shape of the outer surface 23u or the inner side surface 24u of the tubular member 2u.
  • FIGS. 16A and 16B are diagrams illustrating an example of the configuration of the lighting device 100v according to the first modification of the fourth embodiment.
  • 16A is a top view
  • FIG. 16B is a cross-sectional view taken along the line EE'of FIG. 16A.
  • the lighting device 100v has a light guide unit 300v.
  • the light guide unit 300v has a tubular member 2v.
  • the tubular member 2v is formed in a tapered shape that becomes thinner as it approaches the light incident end surface 21v.
  • the direction approaching the light incident end surface 21v corresponds to the negative Z-axis direction in the examples of FIGS. 16A and 16B.
  • a light extraction unit 241v is provided on the inner side surface 24v of the tubular member 2v.
  • the light extraction portion 241v may be provided by forming a prism portion, an uneven portion, or the like on at least a part of the inner side surface 24v, or the tubular member 2v via an adhesive (including a pressure-sensitive adhesive). It may be provided by coupling an optical functional layer to the surface.
  • the light extraction unit 241v reflects, scatters, refracts or diffracts the light guided in the wall portion 22v of the tubular member 2v toward the outer surface 23v, and passes the light emitting portion 231v from the inside to the outside of the wall portion 22v. Can be emitted to.
  • the lighting device 100v is the same as the lighting device 100u except that the tapered shape of the tubular member 2v becomes thinner as it approaches the light incident end surface 21v, overlapping description will be omitted here.
  • FIGS. 17A and 17B are diagrams illustrating an example of the configuration of the lighting device 100w according to the second modification of the fourth embodiment.
  • 17A is a top view
  • FIG. 17B is a cross-sectional view taken along the line FF'of FIG. 17A.
  • the lighting device 100w has a light guide unit 300w.
  • the light guide portion 300w has a tubular member 2w.
  • the tubular member 2w has a conical shape in which a tapered tip portion 26 that becomes thinner as the distance from the light incident end surface 21w is connected.
  • the tip portion 26 circled by the two-dot chain line in FIG. 17B corresponds to the tapered tip portion.
  • a light extraction unit 241w is provided on the inner side surface 24w of the tubular member 2w.
  • the light extraction portion 241w may be provided by forming a prism portion, an uneven portion, or the like on at least a part of the inner side surface 24w, or may have an optical function via an adhesive (including a pressure-sensitive adhesive).
  • the layer may be provided by being bonded to the tubular member 2w.
  • the light extraction unit 241w reflects, scatters, refracts or diffracts the light guided in the wall portion 22w of the tubular member 2w toward the outer surface 23w, and passes the light emitting portion 231w from the inside to the outside of the wall portion 22w. Can be emitted to.
  • the lighting device 100w is the same as the lighting device 100u except that it has a conical shape in which the tapered tip portion 26 is connected, overlapping description will be omitted. However, since the tapered tip portion 26 of the lighting device 100w is connected, dust and dirt enter the inside of the tubular member 2w without providing the lid member 4 and the like shown in FIGS. 14A and 14B. Can be prevented.
  • the configuration in which the tubular member 2w has a conical shape is exemplified, but the present invention is not limited to this, and the tubular member 2w is a triangular pyramid, a quadrangular pyramid, a hexagonal pyramid, or the like. It may have various pyramidal shapes. Further, since the tubular member 2w has a conical shape, it can also be referred to as a conical member.
  • FIG. 18 is a perspective view illustrating an example of the configuration of the lighting device 100y.
  • 19A and 19B are views for explaining an example of the configuration of the lighting device 100y,
  • FIG. 19A is a top view, and
  • FIG. 19B is a cross-sectional view taken along the line GG'in FIG. 19A.
  • the lighting device 100y has a light guide unit 300y.
  • the light guide unit 300y has a tubular member 2y.
  • the cylindrical member 2y does not have an end portion of the plate-shaped member connected to the other end portion.
  • the tubular member 2y is a member obtained by winding a plate-shaped member into a cylindrical shape. As the material of the tubular member 2y, the same material as that of the tubular member 2 can be applied.
  • a light extraction unit 241y is provided on the inner side surface 24y of the tubular member 2y.
  • the light extraction portion 241y may be provided by forming a prism portion, an uneven portion, or the like on at least a part of the inner side surface 24y, or the optical functional layer may be provided via an adhesive (including a pressure-sensitive adhesive). It may be provided by being coupled to the tubular member 2y.
  • the light extraction unit 241y reflects, scatters, refracts or diffracts the light guided inside the wall portion 22y of the tubular member 2y toward the outer surface 23y, and passes the light emitting portion 231y from the inside to the outside of the wall portion 22y. Can be emitted to.
  • the tubular member may have a configuration in which the end portion of the plate-shaped member is not connected to the other end portion, or a configuration in which a part of the cylinder along the circumferential direction is missing. The same effect as that of the embodiment can be obtained.
  • tubular member 2y having a shape other than the substantially circular shape such as a triangle, a quadrangle, or a hexagon may be used.
  • the tubular member 2y shown in FIGS. 18, 19A and 19B is formed so that a part of the outer surface is in contact with a part of the inner surface, but the present invention is not limited to this form and is not limited to the outer surface.
  • a part of the side surface may be formed without contacting a part of the inner side surface.
  • each of the second to fourth embodiments to the lighting device 100y and obtain the same effect as each of the second to fourth embodiments.
  • the optical functional layer in the light extraction portion is formed in a shape that follows the shape of the outer surface or the inner surface of the tubular member 2y.
  • FIG. 20 is a perspective view illustrating an example of the configuration of the lighting device 100z.
  • 21A and 21B are views for explaining an example of the configuration of the lighting device 100z,
  • FIG. 21A is a top view, and
  • FIG. 21B is a sectional view taken along the line HH'of FIG. 21A.
  • the lighting device 100z has a light guide unit 300z. Further, the light guide portion 300z has a curved surface member 2z.
  • the curved surface member 2z is a hollow hemispherical member. In other words, the curved surface member 2z is a hollow hemisphere that is a part of the hollow sphere.
  • the material of the curved surface member 2z the same material as that of the cylindrical member 2 can be applied.
  • the curved surface member 2z and the installation surface 3z of the curved surface member 2z on the base portion 3 form a closed space.
  • the installation surface 3z is a surface of the base portion 3 on the positive direction side of the Z axis, and is an example of an installation surface of the curved surface member.
  • the closed space means a space in which the entire space formed by the curved surface member 2z and the installation surface 3z is closed and is not open to the outside.
  • the method for manufacturing the spherical member is not particularly limited, but the spherical member can be manufactured, for example, by pressing a mold having a desired shape against the plate-shaped member to process the plate-shaped member.
  • a light extraction unit 241z is provided on the inner side surface 24z of the curved surface member 2z.
  • the inner side surface 24z corresponds to the entire inner surface of the curved surface member 2z
  • the outer surface 23z corresponds to the entire outer surface of the curved surface member 2z.
  • the light extraction portion 241z may be provided by forming a prism portion, an uneven portion or the like on at least a part of the inner side surface 24z, or may be provided via an adhesive (including a pressure-sensitive adhesive) as an optical functional layer. May be provided by being coupled to the curved surface member 2z.
  • the light emitted by the light source 1 enters the inside of the wall portion 22z through the light incident end surface 21z of the curved surface member 2z, and is guided inside the wall portion 22z. Inside the wall portion 22z, light is guided while repeating total reflection on each of the outer surface 23z and the inner surface 24z.
  • the light extraction unit 241z reflects, scatters, refracts or diffracts a part of the light guided in the wall portion 22z toward the outer surface 23z, and emits the light from the inside of the wall portion 22z to the outside through the light emission portion 231z. Can be made to.
  • the same effect as that of the first embodiment can be obtained. Further, by making it hemispherical, it is possible to illuminate a wide range of space with light having substantially uniform brightness. Further, since the inside of the curved surface member 2z is not open to the outside, it is possible to prevent dust and dirt from entering the inside of the curved surface member 2z without providing the lid member 4 and the like shown in FIGS. 14A and 14B. be able to. The other effects are the same as those described in the first embodiment.
  • the second embodiment can be applied to the lighting device 100z, and the same effect as that of the second embodiment can be obtained. Further, not only the light extraction unit 241 but also the light extraction units 241a to 241n can be applied to the lighting device 100z. However, it is preferable that the optical functional layer in the light extraction unit 241z is formed in a shape that follows the shape of the outer surface 23z or the inner surface 24z of the curved surface member 2z.
  • the curved surface member of the lighting device according to the embodiment is not limited to the hemispherical member, and may be a member that is a part of a hollow sphere or a spheroid.
  • various modifications of the lighting device having a curved surface member will be described.
  • FIG. 22A and 22B are perspective views illustrating the configuration of the lighting device according to the modified example of the sixth embodiment, FIG. 22A is a diagram showing a first modified example, and FIG. 22B is a diagram showing a second modified example. be.
  • the lighting device 100A has a light guide unit 300A. Further, the light guide unit 300A has a curved surface member 2A.
  • the curved surface member 2A is a part of a hollow spheroid obtained by rotating an ellipse having an X-axis as a long axis around the X-axis.
  • the lighting device 100B has a light guide unit 300B.
  • the light guide unit 300B has a curved surface member 2B.
  • the curved surface member 2B is a part of a hollow spheroid obtained by rotating an ellipse having a Z axis as a major axis around the Z axis.
  • the lighting device 100A is the same as the lighting device 100z except that the curved surface member 2A is a part of a hollow spheroid obtained by rotating an ellipse having an X axis as a long axis around the X axis.
  • the illuminating device 100B is the same as the illuminating device 100z except that the curved surface member 2B is a part of a hollow spheroid obtained by rotating an ellipse having the Z axis as a long axis around the Z axis. .. Therefore, a duplicate description will be omitted here.
  • FIGS. 23A and 23B are views for explaining an example of the configuration of the lighting device 100D according to the third modification of the sixth embodiment, FIG. 23A is a top view, and FIG. 23B is an I-I'of FIG. 23A. It is a cross-sectional view taken along the arrow.
  • the lighting device 100D has a light guide unit 300D. Further, the light guide unit 300D has a curved surface member 2D.
  • the curved surface member 2D is a portion corresponding to approximately 1/4 of the hollow sphere.
  • a light extraction unit 241D is provided on the inner side surface 24D of the curved surface member 2D.
  • the inner side surface 24D corresponds to the entire inner surface of the curved surface member 2D
  • the outer surface 23D corresponds to the entire outer surface of the curved surface member 2D.
  • the light extraction portion 241D may be provided by forming a prism portion, an uneven portion or the like on at least a part of the inner side surface 24D, or an optical functional layer via an adhesive (including a pressure-sensitive adhesive). May be provided by being coupled to the curved surface member 2D.
  • the light emitted by the light source 1 enters the inside of the wall portion 22D through the light incident end surface 21D of the curved surface member 2D, and is guided inside the wall portion 22D. Inside the wall portion 22D, light is guided by repeating total reflection on each of the outer surface 23D and the inner surface 24D.
  • the light extraction unit 241D reflects, scatters, refracts or diffracts a part of the light guided in the wall portion 22D of the curved surface member 2D toward the outer surface 23D, and passes the light emitting portion 231D to the inside of the wall portion 22D. Can be emitted to the outside from.
  • the same effect as that of the lighting device 100z according to the sixth embodiment can be obtained.
  • the range of lighting is narrower than that of the lighting device 100z, but it still supports an orientation of 180 degrees. It is possible to illuminate a wide range of space.
  • the second embodiment can be applied to the lighting device 100D, and the same effect as that of the second embodiment can be obtained. Further, not only the light extraction unit 241 but also the light extraction units 241a to 241n can be applied to the lighting device 100D. However, it is preferable that the optical functional layer in the light extraction unit 241D is formed in a shape that follows the shape of the outer surface 23D or the inner surface 24D of the curved surface member 2D.
  • FIGS. 24A and 24B are views for explaining an example of the configuration of the lighting device 100E according to the fourth modification of the sixth embodiment, FIG. 24A is a top view, and FIG. 24B is a JJ'of FIG. 24A. It is a cross-sectional view taken along the arrow.
  • the lighting device 100E has a light guide unit 300E. Further, the light guide unit 300E has a curved surface member 2E.
  • the curved surface member 2E is a portion corresponding to more than half of the hollow sphere.
  • a light extraction unit 241E is provided on the inner side surface 24E of the curved surface member 2E.
  • the inner side surface 24E corresponds to the entire inner surface of the curved surface member 2E
  • the outer surface 23E corresponds to the entire outer surface of the curved surface member 2E.
  • the light extraction portion 241E may be provided by forming a prism portion, an uneven portion or the like on at least a part of the inner side surface 24E, or an optical functional layer via an adhesive (including a pressure-sensitive adhesive). May be provided by being coupled to the curved surface member 2E.
  • the light emitted by the light source 1 enters the inside of the wall portion 22E through the light incident end surface 21E of the curved surface member 2E, and is guided inside the wall portion 22E. Inside the wall portion 22E, light is guided by repeating total reflection on each of the outer surface 23E and the inner surface 24E.
  • the light extraction unit 241E reflects, scatters, refracts or diffracts the light guided in the wall portion 22E of the curved surface member 2E toward the outer surface 23E, and passes the light emitting portion 231E from the inside to the outside of the wall portion 22E. It can be emitted.
  • the same effect as that of the lighting device 100z according to the sixth embodiment can be obtained.
  • the second embodiment can be applied to the lighting device 100D, and the same effect as that of the second embodiment can be obtained.
  • the optical functional layer in the light extraction unit 241E is formed in a shape that follows the shape of the outer surface 23E or the inner side surface 24E of the curved surface member 2E.
  • the lighting device 100F is a device installed on a side wall or the like inside a building and illuminates an indoor space from the side wall.
  • FIG. 25 is a cross-sectional view illustrating an example of the configuration of the lighting device 100F.
  • FIG. 25 corresponds to a view in which the configuration of FIG. 2B, which is a cross section taken along the line AA'of FIG. 2A, is rotated clockwise by 90 degrees.
  • the lighting device 100F has the same components as the lighting device 100 shown in the first embodiment.
  • each component included in the lighting device 100 is arranged so as to be rotated 90 degrees clockwise as a whole, and the base portion 3 including the light source 1 is fixed to the side wall 301.
  • the light emitted by the light source 1 passes through the light incident end surface 21 and enters the wall portion 22 of the tubular member 2, and is guided through the wall portion 22 while repeating total reflection on the outer surface 23 and the inner side surface 24. ..
  • a part of the light guided inside the wall portion 22 is reflected, scattered, refracted or diffracted toward the outside of the tubular member 2 by the light extraction portion 241 and passes through the light emitting portion 231 to the wall portion 22. It emits from the inside to the outside.
  • the lighting device 100F fixed to the side wall 301 can illuminate a wide range of the interior space by the emitted light 232 emitted from the light emitting unit 231.
  • the installation location of the lighting device 100F is not limited to the side wall inside the building, and the lighting device 100F may be installed on the side wall outside the building. Further, the lighting device 100F may be fixed to the side wall 301 by embedding the base portion 3 inside the side wall 301.
  • the configuration in which the lighting device 100F has the light guide unit 300 is exemplified, but the present invention is not limited to this.
  • the lighting device 100F may have any one of the light guide units 300a to 300E instead of the light guide unit 300.
  • the lighting device 100G is a device installed on the ceiling or the like inside a building and illuminates the interior space from the ceiling.
  • FIG. 26 is a cross-sectional view illustrating an example of the configuration of the lighting device 100G.
  • FIG. 26 corresponds to a view in which the configuration of FIG. 2B, which is a cross section taken along the line AA'of FIG. 2A, is rotated clockwise by 180 degrees.
  • the lighting device 100G has the same components as the lighting device 100 shown in the first embodiment.
  • each component included in the lighting device 100 is arranged so as to be rotated 180 degrees clockwise as a whole, and the base portion 3 including the light source 1 is fixed to the ceiling 302.
  • the light emitted by the light source 1 passes through the light incident end surface 21 and enters the wall portion 22 of the tubular member 2, and is guided through the wall portion 22 while repeating total reflection on the outer surface 23 and the inner side surface 24. ..
  • a part of the light guided inside the wall portion 22 is reflected, scattered, refracted or diffracted toward the outside of the tubular member 2 by the light extraction portion 241 and passes through the light emitting portion 231 to the wall portion 22. It emits from the inside to the outside.
  • the lighting device 100G fixed to the ceiling 302 can illuminate a wide range of the interior space by the emitted light 232 emitted from the light emitting unit 231.
  • the lighting device 100G may be fixed to the ceiling 302 by embedding the base portion 3 inside the ceiling 302.
  • the configuration in which the lighting device 100G has the light guide unit 300 is exemplified, but the present invention is not limited to this.
  • the lighting device 100G may have any one of the light guide units 300a to 300E instead of the light guide unit 300.
  • the curved surface member according to the embodiment may have any shape as long as it is a part of a hollow sphere or a spheroid. However, if the curved surface member and the installation surface are configured to form a closed space, it is possible to prevent dust and dirt from entering the closed space, which is more preferable.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)
PCT/JP2021/042308 2020-11-24 2021-11-17 照明装置 WO2022113857A1 (ja)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11232919A (ja) * 1998-02-17 1999-08-27 Fuji Xerox Co Ltd フロントライト照明装置および反射型表示装置
JP2009070826A (ja) * 2005-08-17 2009-04-02 Fujifilm Corp 面状照明装置
JP2011096417A (ja) * 2009-10-28 2011-05-12 Skg:Kk 照明装置
JP2014235956A (ja) * 2013-06-05 2014-12-15 三菱電機株式会社 照明ランプ本体、照明ランプ及び照明装置
JP2015164136A (ja) * 2015-04-22 2015-09-10 三菱電機照明株式会社 照明装置
JP3223313U (ja) * 2019-06-08 2019-10-03 株式会社ビジネス・フォロー 照明装置
JP2021128227A (ja) * 2020-02-13 2021-09-02 株式会社ドーコーシン 鏡付照明装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11232919A (ja) * 1998-02-17 1999-08-27 Fuji Xerox Co Ltd フロントライト照明装置および反射型表示装置
JP2009070826A (ja) * 2005-08-17 2009-04-02 Fujifilm Corp 面状照明装置
JP2011096417A (ja) * 2009-10-28 2011-05-12 Skg:Kk 照明装置
JP2014235956A (ja) * 2013-06-05 2014-12-15 三菱電機株式会社 照明ランプ本体、照明ランプ及び照明装置
JP2015164136A (ja) * 2015-04-22 2015-09-10 三菱電機照明株式会社 照明装置
JP3223313U (ja) * 2019-06-08 2019-10-03 株式会社ビジネス・フォロー 照明装置
JP2021128227A (ja) * 2020-02-13 2021-09-02 株式会社ドーコーシン 鏡付照明装置

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