WO2013128771A1 - Module d'éclairage et dispositif d'éclairage équipé de ce dernier - Google Patents

Module d'éclairage et dispositif d'éclairage équipé de ce dernier Download PDF

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Publication number
WO2013128771A1
WO2013128771A1 PCT/JP2012/083781 JP2012083781W WO2013128771A1 WO 2013128771 A1 WO2013128771 A1 WO 2013128771A1 JP 2012083781 W JP2012083781 W JP 2012083781W WO 2013128771 A1 WO2013128771 A1 WO 2013128771A1
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WO
WIPO (PCT)
Prior art keywords
light
incident
total reflection
light source
lighting
Prior art date
Application number
PCT/JP2012/083781
Other languages
English (en)
Japanese (ja)
Inventor
良 阿部
西岡　澄人
泰徳 金澤
酒井　啓至
Original Assignee
シャープ株式会社
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 シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2013128771A1 publication Critical patent/WO2013128771A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide

Definitions

  • the present invention relates to a lighting module used as room lighting, and more specifically, includes a light source and a light guide, and a lighting module that emits light from the light source from a light emitting surface through a light guide plate, and a lighting device including the same.
  • a lighting module used as room lighting includes a light source and a light guide, and a lighting module that emits light from the light source from a light emitting surface through a light guide plate, and a lighting device including the same.
  • Patent Document 1 proposes a lighting fixture that includes a plurality of light sources and a light guide plate made of a light-transmitting material optically coupled to the light sources.
  • light from the light source is incident from the end face (incident surface) of the light guide plate, and the light of the light source is emitted to the other surface side by the reflective layer provided on one surface of the light guide plate.
  • the present invention has been made to solve the above-described problems, and realizes an illumination module and an illumination device that can prevent the occurrence of bright and dark stripes of light and can obtain a more uniform illuminance distribution. With the goal.
  • the illumination module of the present invention includes (1) a light source, (2) an incident surface on which light from the light source is incident, an adjacent surface of the incident surface, and facing each other, The first total reflection surface and the second total reflection surface that totally reflect the light incident from the incident surface and the incident surface, while being totally reflected between the first total reflection surface and the second total reflection surface. And a light guide having an exit surface for diffusing and exiting the progressed light.
  • the light traveling while being totally reflected between the first total reflection surface and the second total reflection surface is an angle with respect to the output surface when the distance between the input surface and the output surface reaches the output surface when the predetermined condition is satisfied.
  • the intensity of the light intensity alternately occurs.
  • the exit surface diffuses and emits light, the intensity of the light amount can be suppressed according to the angle with respect to the exit surface, and the light stripes on the irradiated surface can be reduced. Irradiation can be performed uniformly without generating.
  • the exit surface may not be parallel to the entrance surface. Therefore, the irradiation direction can be changed by appropriately changing the angle of the exit surface with respect to the entrance surface.
  • the exit surface is preferably a rough surface. Therefore, it is possible to easily realize an emission surface having light diffusibility without using another member such as a diffusion sheet.
  • a diffusion reflection layer that diffuses and reflects the light that travels while totally reflecting between the first total reflection surface and the second total reflection surface is formed on the emission surface. May be. Thereby, an irradiation direction can be changed easily.
  • the illumination device of the present invention is characterized by comprising the above illumination module and a lighting means for lighting the light source.
  • the illumination device of the present invention is preferably installed so that the traveling direction of the light emitted from the emission surface is a direction toward the floor surface. Thereby, a floor surface and a desktop can be irradiated uniformly.
  • the illumination module or the illumination device of the present invention it is possible to prevent the occurrence of bright and dark stripes of light and to obtain a more uniform illuminance distribution.
  • FIG. 2 is a cross-sectional view taken along the line XX in FIG. 1A, showing the internal structure of the illumination module. It is a figure which shows the structure of the light source with which an illumination module is provided.
  • FIG. 1 It is a perspective view which shows the illuminating device provided with the illumination module. It is a figure which shows the irradiation direction of the illumination module which concerns on another embodiment of this invention. It is a figure explaining the relationship between the shape of a light guide, and the strength of light quantity.
  • FIG. 1A is a perspective view showing an illumination module 100 according to the present embodiment
  • FIG. 1B is a diagram showing an internal structure of the illumination module 100, and is an XX in FIG. It is sectional drawing.
  • the illumination module 100 includes a light source 1, a light guide 2, and a fixing member 3 that fixes the light source 1 and the light guide 2.
  • the coupling portion reflecting member 4 is provided.
  • the light guide 2 is mainly made of an acrylic resin having translucency, and an incident surface 21 on which light from the light source 1 is incident, and an exit from which the light incident from the incident surface 21 is opposed to the incident surface 21.
  • the light guide 2 includes a first total reflection surface 23 and a second total reflection surface 24 that are adjacent to the incident surface 21 and face each other, and totally reflect light incident from the incident surface 21. Yes. Thereby, the light incident from the incident surface 21 reaches the emission surface 22 and is emitted while repeating total reflection by the first total reflection surface 23 and the second total reflection surface 24.
  • the light guide 2 is plate-shaped, and the entrance surface 21 and the exit surface 22 facing each other are the end surfaces, and the first total reflection surface 23 and the second total reflection surface 24 are in the thickness direction.
  • the surface is perpendicular to
  • the material used as the light guide 2 is made of acrylic resin, the material is not limited to this, and it has translucency such as PC (polycarbonate) or PS (polystyrene).
  • PC polycarbonate
  • PS polystyrene
  • any material can be used as long as the guided light can extract the light from the emission surface 22.
  • the light source 1 is disposed to face the incident surface 21 of the light guide 2.
  • the light source 1 is composed of a plurality of LEDs.
  • the light source 1 has its light output adjusted by a light source control means (not shown), and as a result, the amount of light incident on the incident surface 21 is adjusted.
  • FIG. 2 is a diagram showing a detailed configuration of the light source 1.
  • the light source 1 includes a plurality of white LEDs 111 and light bulb color LEDs 112, and the white LEDs 111 and the light bulb color LEDs 112 are alternately arranged in a row.
  • the white LEDs 111 and the light bulb color LEDs 112 are alternately arranged in a row.
  • the light source 1 can control the light amount and the color tone by the light source control means.
  • white and bulb-colored LEDs (light emitters) arranged in a row are used as the configuration of the light source for color tone control, but the type and color of the light emitter to be used, The arrangement is not limited to this, and the type, color, arrangement, and number may be appropriately determined according to the purpose.
  • a coupling portion reflecting member 4 is provided in the vicinity of the coupling portion between the light source 1 and the light guide 2. Since the light emitted from the light source 1 has a spread, some light having a large radiation angle is not incident on the incident surface 21. Therefore, the coupling portion reflecting member 4 is arranged so that light that is off the incident surface 21 is guided again to the incident surface 21 by reflection, and the utilization efficiency of the light from the light source 1 can be improved.
  • the light source 1 is fixed to the fixing member 3 by means such as screwing or adhesive tape.
  • FIG. 3 is a diagram illustrating a method of positioning the light guide 2 with respect to the fixing member 3.
  • a positioning convex portion 31 is provided on the fixed member 3
  • a receiving portion 25 is provided on the light guide 2
  • the positioning of the light guide 2 with respect to the fixed member 3 is performed for positioning. This is done by engaging the convex portion 31 and the receiving portion 25.
  • the positioning projection 31 and the receiving portion 25 are engaged with each other so that the alignment between the light source 1 and the incident surface 21 of the light guide 2 can be accurately and easily performed. It is possible to do it.
  • the light guide 2 is prevented from falling off the fixing member 3. ing.
  • the positioning convex portion 31 and the receiving portion 25 are engaged with each other, it is preferable that there is a gap between the positioning convex portion 31 and the receiving portion 25. This prevents the light guide 2 from being stressed even if heat generated from the light source 1 or expansion or contraction of the light guide 2 due to changes in the environmental temperature occurs, and the light guide 2 is distorted or bent. It is for preventing.
  • the positioning convex portion 31 is used as an engaging means with the receiving portion 25 of the light guide 2.
  • the present invention is not limited to this, and for example, as shown in FIG. Any structure that can prevent the light guide 2 from falling off the fixing member 3 may be used.
  • the shape of the receiving portion 25 is also U-shaped in the present embodiment, but is not limited to this as long as it is a shape that can be engaged with a positioning structure such as the positioning convex portion 31 and the screw 32.
  • the size, shape, position, and number of the positioning convex portion 31 and the receiving portion 25 may be appropriately set according to the specifications of the illumination module 100.
  • the shape of the fixing member 3 may be determined in consideration of design and the like. Since the light source 1 is fixed to the fixing member 3, the material of the fixing member 3 is a metal material having high thermal conductivity so that heat generated from the light source 1 can be efficiently transferred at the time of lighting and can be dissipated to the outside. It is preferable to do.
  • the exit surface 22 of the light guide 2 is a rough surface, and has a function of diffusing and exiting light that has passed through the exit surface 22.
  • the rough surface is a surface that has not been subjected to a smoothing polishing process and has a large number of minute irregularities, and does not produce a bright and dark stripe pattern.
  • FIG. 9 is a diagram illustrating the relationship between the shape of the light guide and the intensity of light.
  • the thickness of the plate-shaped light guide 2 is t
  • the distance between the incident surface 21 and the emission surface 22 is L
  • the maximum emission angle of the light source 1 is ⁇ , L ⁇ t / (2 tan ⁇ )
  • the intensity of the light intensity is alternately generated according to the angle with respect to the output surface 22. This is because light is totally reflected by the first total reflection surface 23 and the second total reflection surface 24 inside the light guide 2.
  • all end surfaces including the end surface serving as the exit surface are polished.
  • the intensity of the light intensity can be suppressed by making the emission surface 22 rough as in the present embodiment and imparting light diffusibility to the emission surface 22.
  • a more uniform illuminance distribution can be obtained on the irradiation surface such as the floor surface.
  • the exit surface 22 is a rough surface in this embodiment, but the means for imparting light diffusibility to the exit surface 22 is not limited to this, for example, The present invention is not limited to this as long as the emitted light is diffused and the intensity of the light quantity according to the emission angle is suppressed by, for example, attaching a translucent diffusion sheet to the emission surface 22 that is a polished surface.
  • the exit surface 22 may be parallel to the entrance surface 21 or may be inclined with respect to the entrance surface 21 according to the position of the illumination surface to be irradiated.
  • the direction of outgoing light from the outgoing surface 22 can be changed by making the shape of the outgoing surface 22 tapered. Thereby, it can irradiate to the irradiation surface of arbitrary positions. Further, by making the exit surface 22 rough as described above, it is possible to obtain a uniform illuminance distribution having no bright and dark stripes on any irradiation surface.
  • the exit surface 22 may be a rough surface, and a reflective layer may be formed on the exit surface 22 using a reflective sheet, a reflective paint, or the like.
  • a diffused reflection sheet or a diffuse reflection paint is used on the exit surface 22 to provide a reflective layer that imparts light diffusibility to the exit surface 22 and also provides reflectivity. What is necessary is just to form.
  • the shape of the emission surface 22 is a taper type here, the shape is not limited to this, and any shape may be used as long as the direction of the emitted light from the emission surface 22 can be changed.
  • FIG. 7 is a diagram illustrating an example of a lighting device according to the present embodiment.
  • the 7 includes a lighting unit 20, a lighting module 100, and a wire 30 for connecting the lighting unit 20 and the lighting module 100.
  • the lighting unit 20 is for supplying power for causing the light source 1 to emit light, and is installed on the top surface.
  • the illumination module 100 is suspended from the lighting unit 20 by a wire 30.
  • the lower end of the wire 30 is connected to the fixing member 3 of the illumination module 100.
  • the hanging wire 30 may be used as a wiring, or a wiring connecting the lighting unit 20 and the light source 1 may be arranged separately from the wire 30. .
  • the lighting module 100 may be fixed directly to the ceiling.
  • the lighting unit 20 disposed on the ceiling and the light source 1 may be connected by wiring.
  • the illumination module 100 By arranging the illumination module 100 as shown in FIG. 7 so that the traveling direction of the light emitted from the emission surface 22 is directed toward the floor surface, the floor surface and the table are uniformly free of bright and dark stripes. An illuminance distribution can be obtained.
  • FIG. 8 is a diagram illustrating an irradiation direction of the illumination module 200 according to the present embodiment.
  • a diffusion pattern is applied to a part of at least one of the first total reflection surface 23 and the second total reflection surface 24, and the surface 1 differs from the first embodiment in that a part of the light traveling inside the light guide 2 can be emitted.
  • the diffusion pattern applied to at least one of the first total reflection surface 23 and the second total reflection surface 24 is formed by diffusion printing, a prism, a microlens, or the like. With these diffusion patterns, a part of the light from the light source 1 incident from the incident surface 21 can be extracted from the first total reflection surface 23 and the second total reflection surface 24 on which the diffusion pattern is formed. That is, incident light incident from the incident surface 21 is repeatedly totally reflected to guide the inside of the light guide 2, but one of at least one of the first total reflection surface 23 and the second total reflection surface 24. When light is incident on the diffusion pattern applied to the part, the incident light is diffused by the diffusion pattern, so that the total reflection condition is broken and light is extracted from the light guide 2.
  • means for imparting diffusibility to extract light from at least one of the first total reflection surface 23 and the second total reflection surface 24 of the light guide 2 is not limited to the method of applying the diffusion pattern.
  • the same effect can be obtained even if a molded product in which a diffusive material is mixed in the entire light-transmitting material or in the vicinity of the surface layer is used as the light guide 2.
  • the diffusing property is imparted by making the emission surface 22 rough, it is possible to suppress the intensity of light intensity depending on the emission angle and to prevent the occurrence of bright and dark stripes on the irradiated surface. It is possible to obtain a uniform illuminance distribution.
  • the illumination modules 100 and 200 include (1) the light source 1, (2) the incident surface 21 on which the light from the light source 1 is incident, and adjacent to the incident surface 21. And the first total reflection surface 23 and the second total reflection surface 24 that totally reflect the light incident from the incident surface 21, and the first total reflection surface 23 and the second total reflection surface 24 that face the incident surface 21. And a light guide body 2 having an emission surface 22 that diffuses and emits light that has traveled while being totally reflected between the total reflection surfaces 24.
  • the light source 1 is configured by an LED.
  • the present invention is not limited to this, and any light source capable of coupling light to the light guide 2 such as an organic EL can be realized. It is.
  • the present invention can be applied to an irradiation apparatus that irradiates a floor surface or the like.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention concerne un module d'éclairage qui empêche les stries d'une lumière claire / sombre de la lumière émise et qui obtient une distribution d'intensité d'éclairage plus uniforme. Un module d'éclairage (100) pourvu d'une source de lumière et une plaque de guidage de lumière (2) qui comprend : une surface d'incidence sur laquelle la lumière provenant de la source de lumière est incidente ; une première surface totalement réfléchissante et une seconde surface totalement réfléchissante pour réfléchir complètement la lumière incidente à partir de la surface incidente, positionnées de manière adjacente à la surface incidente et de façon à se faire mutuellement face ; une surface d'émission (22) pour réfléchir complètement la lumière émise entre la première surface totalement réfléchissante et la seconde surface totalement réfléchissante tout en diffusant et en émettant la lumière transmise et positionnée de manière à faire face à la surface incidente.
PCT/JP2012/083781 2012-02-29 2012-12-27 Module d'éclairage et dispositif d'éclairage équipé de ce dernier WO2013128771A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012044616A JP2013182731A (ja) 2012-02-29 2012-02-29 照明モジュール、及びこれを備えた照明装置
JP2012-044616 2012-02-29

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WO2013128771A1 true WO2013128771A1 (fr) 2013-09-06

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WO (1) WO2013128771A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106662301A (zh) * 2014-07-25 2017-05-10 明拓工业株式会社 面照明体
JP2019123426A (ja) * 2018-01-18 2019-07-25 ダイキョーニシカワ株式会社 車両用内装品

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5792874B1 (ja) * 2014-06-24 2015-10-14 山佐株式会社 遊技機用のパネル照明ユニット
JP6440670B2 (ja) * 2015-12-24 2018-12-19 ミネベアミツミ株式会社 面状照明装置
WO2018025927A1 (fr) * 2016-08-03 2018-02-08 古河電気工業株式会社 Appareil d'éclairage, structure de fixation d'appareil d'éclairage, procédé d'extraction de lumière à partir d'un appareil d'éclairage, et procédé de connexion pour appareil d'éclairage
JP6407458B1 (ja) * 2018-02-07 2018-10-17 古河電気工業株式会社 照明装置、照明装置の取り付け構造、照明装置からの光取り出し方法及び照明装置の光接続方法
US20220042666A1 (en) * 2018-09-14 2022-02-10 Sharp Kabushiki Kaisha Lighting device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006139202A (ja) * 2004-11-15 2006-06-01 Olympus Corp 光パイプ及び照明光学装置及び光学装置
JP2008166145A (ja) * 2006-12-28 2008-07-17 Toyota Motor Corp 車両用灯具及び発光ダイオードバルブ
JP2011233240A (ja) * 2010-04-23 2011-11-17 Panasonic Electric Works Co Ltd 照明装置の取り付け構造

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006139202A (ja) * 2004-11-15 2006-06-01 Olympus Corp 光パイプ及び照明光学装置及び光学装置
JP2008166145A (ja) * 2006-12-28 2008-07-17 Toyota Motor Corp 車両用灯具及び発光ダイオードバルブ
JP2011233240A (ja) * 2010-04-23 2011-11-17 Panasonic Electric Works Co Ltd 照明装置の取り付け構造

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106662301A (zh) * 2014-07-25 2017-05-10 明拓工业株式会社 面照明体
JP2019123426A (ja) * 2018-01-18 2019-07-25 ダイキョーニシカワ株式会社 車両用内装品

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