WO2013128761A1 - Module d'éclairage et dispositif d'éclairage le comprenant - Google Patents

Module d'éclairage et dispositif d'éclairage le comprenant Download PDF

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Publication number
WO2013128761A1
WO2013128761A1 PCT/JP2012/083015 JP2012083015W WO2013128761A1 WO 2013128761 A1 WO2013128761 A1 WO 2013128761A1 JP 2012083015 W JP2012083015 W JP 2012083015W WO 2013128761 A1 WO2013128761 A1 WO 2013128761A1
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WO
WIPO (PCT)
Prior art keywords
light
light guide
illumination
guide plate
illumination module
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2012/083015
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English (en)
Japanese (ja)
Inventor
泰徳 金澤
良 阿部
西岡　澄人
酒井　啓至
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
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Sharp Corp
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Filing date
Publication date
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Publication of WO2013128761A1 publication Critical patent/WO2013128761A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F21S8/06—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures by suspension
    • F21S8/061—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures by suspension with a non-rigid pendant, i.e. a cable, wire or chain
    • 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
    • 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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • 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
    • 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]
    • 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]
    • F21Y2115/15—Organic light-emitting diodes [OLED]

Definitions

  • the present invention relates to an illumination module for causing light from a light source to enter a light guide and outputting the light from the light source through the light guide, and an illumination device including the same.
  • Patent Literature 1 describes a light guide-type illumination device that outputs light from a light source via a light guide made of a transparent material.
  • FIG. 11 is a schematic view showing a part of the lighting device described in Patent Document 1.
  • this illumination device includes a plurality of LEDs 101 as light sources and a light guide body 102 made of a transparent material optically coupled to the LEDs 101.
  • light from the LED 101 is incident from the end face (light incident surface) of the light guide 102 facing the LED 101, guided inside the light guide 102, and emitted from the light exit surface 103.
  • the illuminating device of Patent Document 1 has such a configuration in which the LED 101 and the light guide 102 are used as one unit, and a plurality of units are combined (not shown).
  • Patent Document 2 describes an illumination device (edge light panel) using a liquid crystal backlight technology.
  • a tapered shape is provided on the outer peripheral portion of the light guide so that the outer peripheral portion emits light.
  • FIG. 12 is a cross-sectional view of the illumination device 200 described in Patent Document 2.
  • the lighting device 200 has a configuration in which an LED group 211 and an LED group 212 facing each other are disposed inside a groove provided in the light guide 213.
  • the light guide 213 is formed with light extraction means. For this reason, the light emitted from the LED group 211 is extracted from the emission surface 213a by the light extraction means while guiding the inside of the light guide 213.
  • the light that has not been extracted by the light extraction means is reflected by the tapered portion 214 at the peripheral edge of the light guide 213 and is extracted from the emission surface 213a.
  • JP 2007-80539 A (published March 29, 2007) JP 2011-95439 A (published May 12, 2011)
  • the conventional illumination device has a problem in that it cannot uniformly irradiate a wide irradiation range because the illuminance directly below the illumination device is low.
  • pendant lights that illuminate table surfaces and ceiling lights that illuminate the entire room are required to uniformly irradiate a wide irradiation range.
  • the illumination device of Patent Document 1 combines a plurality of units each including an LED 101 and a light guide 102 and emits light guided through the light guide 102 of each unit from a light exit surface 103, thereby irradiating the surface (target). Irradiation area).
  • the light emitted from the light guide 102 has directivity and does not spread sufficiently.
  • the light guides 102 of the respective units are arranged at a relatively large angle with respect to the central axis of the lighting device as if the umbrellas were widened.
  • a light extraction pattern is formed on the surface of the light guide 102 to emit light that guides the inside of the light guide 102 from the emission surface 104 facing the irradiation surface.
  • the illuminance directly below the lighting device is lowered, and the irradiation range cannot be uniformly irradiated.
  • each unit is installed at various angles and the emitted light from each unit is overlapped to make the irradiation range uniform.
  • the angle of each unit needs to be changed each time depending on various factors such as the width of the irradiation range and the installation conditions of the illumination device. Therefore, it is not realistic to adjust the installation angle of each unit because the configuration of the lighting device and the manufacturing process become complicated.
  • the light guide 213 is designed so that the amount of light reaching the tapered portion 214 is reduced as much as possible.
  • the illuminance immediately below the illumination device 200 of Patent Document 2 also decreases as in the illumination device of Patent Document 1.
  • the reflection sheet 215 is provided on the opposite side to the emission surface 213a of the light guide 213, and the diffusion sheet 216 is provided on the emission surface 213a side. . Therefore, the number of members of the lighting device 200 increases and the configuration becomes complicated. Furthermore, when the diffusion sheet 216 is provided, the transparency on the appearance of the lighting device 200 is lost, and the design is remarkably deteriorated.
  • the lighting device 200 since the lighting device 200 has a structure in which the LED group 211 and the LED group 212 face each other, light from one LED group 211 enters the other LED group 212. For this reason, light loss occurs, and the light extraction efficiency is lowered. Furthermore, when the light from one LED group 211 enters the other LED group 212, an electromotive force is generated in the LED group 212 and the operation becomes unstable.
  • the lighting device 200 has a configuration in which the LED group 211 and the LED group 212 are embedded in the light guide 213. Furthermore, the portion in which the LED group 211 and the LED group 212 are embedded becomes a non-transparent portion.
  • the irradiated surface cannot be irradiated uniformly.
  • the illumination device 200 since the light extraction direction of the illumination device 200 is limited to one direction of the emission surface 213a, the illumination device 200 cannot be applied to a ceiling light or pendant light that illuminates the entire room.
  • the present invention has been made in view of the above-described conventional problems, and an object thereof is to provide an illumination module capable of uniformly irradiating a wide irradiation range with a simple configuration, and an illumination device including the illumination module. It is in.
  • an illumination module of the present invention includes a light source, an incident surface on which light from the light source is incident, and a light guide having an emission surface that emits light incident from the incident surface.
  • the light guide includes a reflective surface that reflects light incident from the incident surface and emits the light from the output surface on a peripheral portion of the light guide, and the reflective surface includes: It consists of the inclined surface inclined with respect to the said output surface.
  • the reflecting surface is formed on the peripheral edge (outer edge) of the light guide. Moreover, the reflecting surface is an inclined surface that is inclined with respect to the exit surface. Thereby, the light incident on the reflection surface (inclined surface) is reflected and emitted from the emission surface. Thereby, the illuminance directly under the illumination module is increased. For this reason, it is not necessary to use the diffusion sheet used in Patent Document 2 in order to increase the illuminance directly below the illumination module. Accordingly, it is possible to provide an illumination module that can uniformly irradiate a wide irradiation range with a simple configuration.
  • the reflecting surface may be a flat surface, a curved surface, or a surface combining a flat surface and a curved surface.
  • the light guide can be easily cut by making the reflecting surface flat, and it is possible to provide a lighting module with high mass productivity and low cost. Moreover, the light extraction efficiency can be improved by making the reflecting surface a curved surface.
  • a light reflecting material may be provided on the reflecting surface.
  • the light incident on the reflecting surface is efficiently emitted to the emitting surface. Therefore, the light extraction efficiency can be improved.
  • the reflecting surface may have light diffusibility.
  • the surface to be irradiated can be illuminated through the emission surface while the reflected light from the reflection surface is diffused. Therefore, the illuminated surface can be illuminated with a wide and gentle illuminance distribution.
  • a light scattering member is provided in at least one of the inside of the light guide and the exit surface.
  • the light guided inside the light guide can collide with the light scattering member and be emitted from the emission surface. Therefore, the light extraction efficiency can be improved.
  • the lighting device of the present invention is characterized by including any one of the above-described lighting modules in order to solve the above-described problems.
  • the illumination module and the illumination device of the present invention it is possible to provide an illumination device capable of uniformly irradiating a wide irradiation range with a simple configuration.
  • FIG. 1 It is sectional drawing of the illuminating device concerning one Embodiment of this invention. It is a figure which shows the illumination module in the illuminating device of FIG. 1, (a) is a front view, (b) is a side view. It is a side view of the illumination module in the illuminating device of FIG. 1, and is a figure which shows the emitted light radiate
  • FIG. 2C is a diagram illustrating a result of the lighting device of FIG. 1 (two lighting modules).
  • (A)-(c) is a side view which shows the light guide applied to the illuminating device of FIG. It is a figure which shows another illumination module which concerns on one Embodiment of this invention, (a) is a top view, (b) is a side view, (c) is the top view seen from the reflective surface side.
  • FIG. 7 is a diagram showing an illumination module provided with another light guide plate in the illumination modules shown in FIGS. 6A to 6C, where FIG. 6A is a front view, FIG. 6B is a side view, and FIG. It is the top view seen from the surface side.
  • FIG. 1 It is a figure which shows another illumination module which concerns on one Embodiment of this invention, (a) is a front, (b) is AA 'sectional drawing in (a). It is a figure which shows another illumination module which concerns on one Embodiment of this invention, (a) is a front view, (b) is an enlarged view of the engaging part of the LED board and light guide in (a). It is a figure which shows the illumination module mounted in another illuminating device which concerns on one Embodiment of this invention, (a) is a front view, (b) is sectional drawing. It is the schematic which shows a part of illuminating device of patent document 1. It is sectional drawing of the illuminating device of patent document 2. FIG.
  • a suspended illumination device will be described as an example of the illumination device according to the present invention.
  • the lighting device according to the present invention is not limited to a hanging type lighting device, and can be applied to various lighting applications such as a ceiling light directly attached to a ceiling surface and a lighting device embedded in a wall surface.
  • the installation surface side of the lighting device will be described as an upper part (upper), and the main irradiation side such as a floor will be described as a lower part (lower).
  • the same referential mark shall represent the same part or an equivalent part (same function), and detailed description is not repeated.
  • FIG. 1 is a cross-sectional view of lighting device 10 according to Embodiment 1.
  • FIG. 1 is a cross-sectional view of lighting device 10 according to Embodiment 1.
  • the lighting device 10 is a hanging type lighting device (so-called pendant light) that is suspended from the ceiling surface 20.
  • the lighting device 10 includes a lighting fixture body 1, a power supply box 2 installed on the ceiling surface 20, and an electric wire 3 that suspends the lighting fixture body 1 from the power supply box 2.
  • the lighting fixture body 1 is composed of a plurality of lighting modules 11, and in the present embodiment, two lighting modules 11 are connected.
  • the luminaire body 1 is suspended and supported by an electric wire 3 connected to a power supply box 2.
  • the luminaire main body 1 is disposed substantially parallel to the ceiling surface 20 and the floor surface.
  • the power supply box 2 includes lighting means for lighting the illumination module 11. Specifically, the power supply box 2 incorporates a power supply board for AC-DC conversion. The electric wire 3 supplies electric power from the power supply box 2 to the lighting fixture body 1.
  • FIG. 2 is a view showing the illumination module 11 in the illumination device 10, wherein (a) is a front view and (b) is a cross-sectional view.
  • the illumination module 11 includes an LED 12, a light guide plate 13 that couples light emitted from the LED 12, and a holding member 14 that holds the LED 12 and the light guide plate 13.
  • the LED 12 is a light source in the lighting device 10.
  • the LED 12 has a configuration in which a plurality of LED chips electrically connected to an LED substrate are mounted, and is simply shown in the drawing.
  • the LED substrate and the LED chip are collectively referred to as an LED.
  • the light guide plate 13 is provided apart from the LEDs 12.
  • the light guide plate 13 is orthogonal to the incident surface 13a facing the LED 12, the exit surfaces 13b and 13c facing the ceiling surface or the floor surface, and the surface facing the incident surface 13a (the front surface of the incident surface 13a).
  • a reflecting surface 13d which is a directional surface). It can be said that the emission surfaces 13b and 13c are total reflection surfaces for guiding the optically coupled light into the light guide plate 13.
  • the reflecting surface 13d is not parallel to a surface perpendicular to the incident surface 13a (a surface formed in the thickness direction of the light guide plate 13), but is an inclined surface inclined with respect to a surface perpendicular to the incident surface 13a. ing.
  • the reflecting surface 13d is an inclined surface that is not perpendicular to the emitting surfaces 13b and 13c.
  • the reflecting surface 13d has a shape obtained by taper-cutting a surface of the rectangular parallelepiped light guide plate 13 excluding the incident surface 13a.
  • the light guide plate 13 is formed of a transparent material such as acrylic, polycarbonate, polystyrene, glass or the like. A diffusion material or the like may be printed on the surface of the light guide plate 13 so as to extract light from the combined LEDs 12, and an uneven shape may be provided.
  • the light guide plate 13 may be a light guide in which a diffusing material is dispersed inside the light guide plate 13, for example, Delaglass (registered trademark) AL995 manufactured by Asahi Kasei.
  • the light guide plate 13 may not include a diffusing material, and a light extraction pattern may be formed on one or both of the emission surfaces 13b and 13c. Thereby, light can be extracted from the exit surfaces 13b and 13c by the light extraction pattern. Moreover, when the light extraction pattern is formed, it is possible to select a material for the light guide plate 13 other than the one containing the diffusing material, thereby increasing the product lineup.
  • the illuminating device 10 it is designed so that it may mainly radiate
  • surfaces other than the incident surface 13a can also be used as a light-projection surface. In this case, light can be extracted efficiently and light can be distributed over all directions. Further, when light is emitted inside the holding member 14, the target irradiation area cannot be illuminated. For this reason, it is desirable that the emission surfaces 13 b and 13 c are not formed in the region inside the holding member 14. Thereby, the light utilization efficiency can be improved.
  • the illumination device 10 becomes a surface-emitting light source that does not impair transparency. That is, the illuminating device 10 functions as a surface light source when the LED 12 is lit, and transparency is maintained when the LED 12 is not lit.
  • the light guide plate 13 is a delaglass containing a diffusing material unless otherwise specified.
  • the holding member 14 holds the illumination module 11 in a cantilever manner.
  • the two illumination modules 11 are held by one common holding member 14. For this reason, the number of members of the illumination device 10 can be reduced.
  • the holding member 14 stores the LED 12 therein. That is, the LED 12 is fixed to the holding member 14, and the LED substrate is in contact with the holding member 14.
  • the holding member 14 is preferably made of a material such as aluminum in order to have a role of radiating the heat of the LED 12. That is, it is preferable to use a metal material having high thermal conductivity as the material of the holding member 14 so that heat generated from the LED 12 at the time of lighting can be efficiently transferred and radiated to the outside.
  • the holding member 14 can also be comprised from the resin material etc. which enabled it to ensure heat dissipation and intensity
  • the heat at the time of lighting the LED 12 is radiated to the holding member 14 through the LED substrate. That is, the holding member 14 functions as a heat sink for the LED 12.
  • the shape of the holding member 14 may be determined in consideration of design and the like.
  • FIG. 3 is a side view of the illumination module 11 in the illumination device 10 of FIG.
  • the light emitted from the LED 12 is incident from the incident surface 13 a of the light guide plate 13 facing the LED 12.
  • Light incident on the light guide plate 13 (light that is optically coupled) is guided through the light guide plate 13 while repeating total reflection on the surface of the light guide plate 13 (between the exit surfaces 13b and 13c).
  • the light guide plate 13 includes a diffusing material (not shown) or the like in order to extract the combined light. For this reason, when the light which guides the inside of the light-guide plate 13 collides with a diffusion material, the light will be spread
  • the outgoing light Lb emitted from the outgoing surface 13b and the outgoing light Lc emitted from the outgoing surface 13c have a spread as shown in the figure.
  • the outgoing direction of light having the highest luminous intensity is defined as a main outgoing direction M. From the emission surface 13b and the emission surface 13c, substantially the same amount of light is emitted.
  • the reflecting surface 13d is not parallel to the incident surface 13a, but is an inclined surface inclined with respect to a surface parallel to the incident surface 13a. In other words, it can be said that the reflecting surface 13d is an inclined surface inclined with respect to the emitting surfaces 13b and 13c.
  • the reflective surface 13d is coated with a material that reflects light.
  • the light that has reached the reflecting surface 13d is reflected by the reflecting material and is emitted to the outside of the light guide plate 13 as the main emitted light Ld.
  • the outgoing direction of the outgoing light Ld varies depending on the inclination angle of the reflecting surface 13d.
  • the reflecting surface 13d is inclined so that the angle formed by the emitting surface 13c and the reflecting surface 13d is an acute angle. Therefore, the emitted light Ld is emitted in the same direction as the emission surface 13c, that is, in the floor surface direction ( ⁇ Z direction in the figure). Thereby, the illumination intensity of the floor side (below the illuminating device 10) can be improved.
  • the reflective material provided on the reflective surface 13d is applied to the reflective surface 13d by a manufacturing method such as sticking, sputtering, or stamping.
  • the present invention is not limited to this, and the reflective material provided on the reflective surface 13d is not limited to white paint (white paint), but a material such as a highly reflective polycarbonate in which the reflective material is molded in advance is pasted.
  • the light guide plate 13 can be integrally formed when the light guide plate 13 is formed by injection molding or the like.
  • the reflective material provided in the reflective surface 13d has light diffusibility. That is, it is preferable that the light diffusive reflective material is provided on the reflective surface 13d.
  • the roughening process is performed to the reflective surface 13d.
  • the irradiated surface can be illuminated through the exit surface 13c while the reflected light from the reflecting surface 13d is diffused.
  • Incident light from the reflecting surface 13d to the emitting surface 13c is emitted from the light guide plate 13 as reflected light with less directivity. Therefore, the illuminated surface can be illuminated with a wide and gentle illuminance distribution.
  • the light transmitted through the reflecting surface 13d can diffuse and irradiate the non-irradiated surface. That is, the entire room can be illuminated.
  • the reflective material provided on the reflective surface 13d may be a regular reflective material. In that case, since the directivity of the emitted light from the reflecting surface 13d becomes high, it can be applied to spot illumination applications. Further, the reflective material provided on the reflective surface 13d is not limited to white paint, and may be provided with another color. In this case, since the color of the emitted light can be adjusted, the chromaticity of the light emitted from the light guide plate 13 with respect to the light emitted from the LED 12 can be adjusted, and the illumination module 11 having high functionality can be provided. Furthermore, the lighting module 11 with high designability can be provided.
  • the light emitted from the reflection surface 13d mainly illuminates the target area (for example, the floor side) via the emission surface 13c, and the light emitted from the emission surface 13b.
  • the angle formed between the main emission direction M of the outgoing light Lc from the outgoing surface 13c of the light guide plate 13 and the normal N of the outgoing surface 13c is “ ⁇ ”
  • the outgoing light Ld from the reflective surface 13d is An angle formed between the main emission direction P and the normal line N of the emission surface 13c is “ ⁇ ”.
  • FIG. 4 is a diagram showing optical simulation results of the illuminance distribution and the light distribution of the illuminating device 10 of FIG. 1 and the illuminating device ′ of Patent Document 1 (see FIG. 11).
  • (B) is a figure which shows the result of the illuminating device 10 (one illumination module 11) of FIG. 1
  • (c) is a figure which shows the result of the illuminating device 10 (two illumination modules 11) of FIG.
  • the illuminance distribution indicates the illuminance distribution on the table surface when each lighting device is arranged 70 cm above the table surface at the position of the x mark. That is, the illuminance distribution on the irradiation surface (target region) set 70 cm below each lighting device is shown.
  • the upper contour line in the illuminance distribution indicates the illuminance distribution of the illuminance of 100 (lx) to 300 (lx).
  • the lower graph shows the illuminance distribution of the cross section in the horizontal direction of the central paper surface in the upper diagram.
  • the light distribution is represented by polar coordinates, and an illuminating device (illuminating module) is arranged at the center, and the distance from the center is the intensity of light, and shows the angle dependency with respect to the light incident direction. In each figure, the amount of light emitted from the LEDs is the same.
  • the illumination device of Patent Document 1 has a configuration in which the reflection surface 13d is parallel to the incident surface 13a in the illumination module 11 shown in FIG. That is, FIG. 4A shows the illuminance distribution and the light distribution of the outgoing light only from the outgoing surface 13c in the state where there is no outgoing from the reflecting surface 13d.
  • the same amount of light is emitted from the exit surface 13b on the ceiling side and the exit surface 13c on the floor side.
  • the straight component of light from the light incident direction the straight component in the light guide direction
  • the straight component in the light guide direction remains strong, it can be seen that the light emitted to the wall side is strong.
  • the illuminance of the irradiation region (target region) is low, and the irradiation surface cannot be uniformly irradiated. Furthermore, in this case, a strip-shaped illumination is made on the wall side, which is recognized by the user as unevenness.
  • FIG. 4B shows the illuminance distribution and light distribution of the illumination module 11 alone.
  • the illumination module 11 is provided with a reflecting surface 13d.
  • the emitted light from the emission surface 13c and the reflection surface 13d is more efficiently guided to the floor side (target region) than in FIG. 4 (a). Yes.
  • the illumination on the floor side can be increased. That is, when the reflective surface 13d is provided, it can be seen that the illuminance directly below the illumination device 10 is increased due to the influence of the light emitted from the reflective surface 13d.
  • FIG. 4 (c) shows the illuminance distribution and the light distribution when two illumination modules 11 are combined.
  • the illumination distributions of the illumination modules 11 overlap each other.
  • matching between the position where the illuminance is highest and the installation position of the lighting device is realized. That is, it can be seen that the center of the illuminance distribution matches the center of the lighting device.
  • the region of the same illuminance (100 (lx), 200 (lx)) is wide, and a gentle light distribution can be realized.
  • the light amount (A) of the outgoing light Lb emitted from the outgoing surface 13b, the light amount (B) of the outgoing light Lc emitted from the outgoing surface 13c, and the light reflected by the reflecting surface 13d is: (A + B) / 2 ⁇ C It is preferable that
  • FIG. 5A to 5C are side views showing the light guide plates 13, 13A, 13B applied to the lighting device 10.
  • FIG. 5A to 5C are side views showing the light guide plates 13, 13A, 13B applied to the lighting device 10.
  • the reflecting surface 13d of the light guide plate 13 is an inclined surface that is not parallel to the incident surface 13a and is a flat surface.
  • the angle ⁇ and the angle ⁇ satisfy the condition of ⁇ ⁇ ⁇ (see FIG. 3).
  • the angle “ ⁇ ” formed between the normal line N of the emission surface 13b or 13c and the reflection surface 13d is 5 ° or more and 60 ° or less (5 ° ⁇ ⁇ ⁇ 60 °).
  • it is 25 ° or more and 50 ° or less (5 ° ⁇ ⁇ ⁇ 50 °).
  • the light guide plate 13 may have a curved surface shape such as the light guide plate 13A shown in FIG. 5B or the light guide plate 13B shown in FIG.
  • the light guide plate 13A in FIG. 5B and the light guide plate 13B in FIG. 5C have different shapes of the light guide plate 13 and the reflecting surface 13d.
  • the reflection surface 13d 'of the light guide plate 13A has an R shape (arc shape) instead of a flat surface.
  • the reflecting surface 13d ' has an R shape
  • the reflection surface 13d ′′ of the light guide plate 13B has an elliptical shape instead of a flat surface.
  • the length in the minor axis direction is preferably the same as the thickness of the light guide plate 13B.
  • the configuration of the illumination module 11 in the illumination device 10 of the first embodiment is not limited to the above configuration.
  • the illumination module 11 can be configured as shown in the following second to fifth embodiments.
  • another embodiment of the illumination module 11 will be described focusing on differences from the illumination module 11.
  • FIGS. 6A and 6B are diagrams (three views) showing the illumination module 11a according to the second embodiment, where FIG. 6A is a plan view, FIG. 6B is a side view, and FIG. 6C is a plan view viewed from the reflecting surface 13d side. is there.
  • the reflecting surface 13d is formed only on the surface facing the incident surface 13a.
  • a reflective surface is also formed on the side surface of the light guide plate 13C.
  • the reflecting surface 13d is formed on the surface facing the incident surface 13a, and the incident surface 13a and Reflective surfaces 13e and 13f are also formed on the surfaces adjacent to the emission surfaces 13b and 13c.
  • the reflective surface 13d is formed on the front side of the incident surface 13a, and the reflective surfaces 13e and 13f are formed on the side surface side of the light guide plate 13C.
  • the reflecting surfaces 13d, 13e, and 13f are formed on the outer edge portion of the light guide plate 13C excluding the incident surface 13a and the emitting surfaces 13b and 13c.
  • the shapes of the reflecting surfaces 13e and 13f are inclined surfaces similar to the reflecting surface 13d. That is, the reflecting surfaces 13e and 13f are not parallel to the surface perpendicular to the incident surface 13a (the surface formed in the thickness direction of the light guide plate 13C) but are inclined with respect to the surface perpendicular to the incident surface 13a. It is an inclined surface. In other words, it can be said that the reflecting surfaces 13e and 13f are inclined surfaces that are not perpendicular to the emitting surfaces 13b and 13c. Moreover, it can be said that the reflective surfaces 13d, 13e, and 13f have a shape in which a surface excluding the incident surface 13a in the rectangular parallelepiped light guide plate 13C is tapered. Similarly to the reflecting surface 13d, the reflecting surfaces 13e and 13f are also coated with a material that reflects light.
  • the reflecting surface 13d is preferably inclined at an angle of 45 ° or less with respect to the normal line of the incident surface 13a, and is preferably 30 ° or less.
  • the angle ( ⁇ ) formed by the reflecting surface 13d and the exit surface 13c perpendicular to the incident surface 13a is desirably 45 ° or less. It is desirable that the temperature is not more than °. If the amount of light emitted from the emission surface 13c is 1 when the angle ⁇ is 45 °, the amount of light when the angle ⁇ is 30 ° is 1.1. Therefore, the light use efficiency can be improved.
  • the light extraction efficiency can be further increased.
  • the light reflected by the reflecting surfaces 13d, 13e, and 13f is emitted from the emitting surface 13c to the floor side. Accordingly, it is possible to improve the illuminance directly below the illumination modules 11a and 11a '(the amount of light emitted to the floor).
  • the reflecting surfaces 13d, 13e, and 13f are flat surfaces.
  • the reflecting surfaces 13d, 13e, and 13f can be curved surfaces. That is, in the illumination module 11a, the reflecting surfaces 13d, 13e, and 13f of the light guide plate 13C are rectangular when viewed from the Z direction in FIG.
  • the present invention is not limited to this, and the corners of the reflecting surfaces 13d, 13e, and 13f may be a fillet shape when viewed from the Z direction.
  • 7A and 7C are diagrams showing an illumination module 11a ′ provided with another light guide plate 13D in the illumination module 11a shown in FIGS. 6A to 6C.
  • FIG. 7A is a plan view
  • FIG. Side view (c) is a plan view seen from the reflecting surface 13d side.
  • the reflecting surfaces 13d, 13e, and 13f have an R shape (arc shape) (see FIG. 5B). Thereby, since it becomes easy to mass-produce light-guide plate 13D, manufacturing cost can be reduced.
  • the reflecting surfaces 13d, 13e, and 13f may have an elliptical shape (elliptical curved surface) (see FIG. 5C). Thereby, the light extraction efficiency can be improved.
  • a reflecting member 15 is provided in order to increase the light utilization efficiency of the LED 12. That is, since the light emitted from the LED 12 has a spread, a part of light having a large radiation angle is not incident on the incident surface 13a. Therefore, the reflection member 15 is disposed in order to guide the light deviating from the incident surface 13a to the incident surface 13a again by reflection and improve the utilization efficiency of the light from the LED 12.
  • the reflecting member 15 is provided in the vicinity of the LED 12 in the holding member 14 and the incident surface 13a of the light guide plate 13D.
  • the reflecting member 15 is provided on the holding member 14 so as to sandwich the LED 12 on the incident surface 13a side end of the light guide plate 13D. That is.
  • the exit surfaces 13b and 13c side of the gap portion between the LED 12 and the incident surface 13a of the light guide plate 13D is sandwiched between the reflecting members 15.
  • the light that has not been coupled to the light guide plate 13D can be reflected by the reflecting member 15 and returned to the light guide plate 13D side. as a result. Since the light utilization efficiency of the LED 12 is improved, the amount of light incident on the light guide plate 13D can be increased. Therefore, the light extraction efficiency of the light guide plate 13D can be further increased.
  • the light guide plate 13D includes a diffusing material
  • light that is emitted from the emission surfaces 13b and 13c also appears in the holding member 14.
  • the reflecting member 15 When the reflecting member 15 is not provided, the leakage light is absorbed by the holding member 14 and does not reach the irradiation surface (irradiated region), leading to a decrease in light utilization efficiency.
  • this leakage light is reflected by the reflecting member 15 and can be returned to the light guide plate 13D again. Therefore, the light extraction efficiency of the light guide plate 13D can be further increased.
  • the gap between the side surface (reflecting surfaces 13e and 13f) of the light guide plate 13 and the LED 12 is also sandwiched by the reflecting member 15 inside the holding member 14.
  • the side surface of the light guide plate 13 here can be rephrased as a surface in the thickness direction of the light guide plate 13 other than the incident surface 13 a inside the holding member 14. Also in this case, the light that could not be coupled to the light guide plate 13 and the light emitted from the side surface of the light guide plate 13D (leakage light) can be returned to the light guide plate 13D by the reflecting member 15. Therefore, the light extraction efficiency of the light guide plate 13D can be further increased.
  • the reflecting member 15 has elasticity.
  • the reflection member 15 is provided in a region where the light guide plate 13D and the holding member 14 are in contact with each other. For this reason, when vibration is applied, the light guide plate 13D may be damaged. If the reflecting member 15 has elasticity, it is possible to absorb an impact, and thus it is possible to prevent the light guide plate 13D from being damaged. Such an effect of preventing the light guide plate 13D from being damaged can be obtained even when the reflecting member 15 does not have a reflecting function (made of an elastic member). However, in this case, since light may be absorbed by the elastic member, it is preferable to have both functions of elasticity and light reflectivity. Thereby, it is possible to prevent light guide plate 13D from being damaged by the elastic function while suppressing light absorption by only the elasticity by the light reflecting function and improving the light utilization efficiency.
  • the illumination modules 11 a and 11 a ′ of the present embodiment also have the same effects as the illumination module 11.
  • the reflection surfaces 13d, 13e, and 13 are formed on the side surfaces of the light guide plates 13C and 13D in addition to the surface facing the incident surface 13a.
  • the emitted light emitted to the floor side from the reflective surfaces 13d, 13e, and 13f via the emitting surface 13c increases. Therefore, the light extraction efficiency can be further increased.
  • the illumination module 11a ' includes the reflecting member 15, the light extraction efficiency can be increased.
  • FIG. 8A and 8B are diagrams showing the illumination module 11b according to the third embodiment, where FIG. 8A is a front view, and FIG. 8B is a cross-sectional view taken along line AA ′ in FIG.
  • the illumination module 11b of the present embodiment is different from the light guide plate 13 of the illumination module 11 of the first embodiment in the shape of the light guide plate 13E.
  • the light guide plate 13E has a donut shape. That is, the light guide plate 13E has a disc shape (strictly cylindrical shape) in which an opening O penetrating in the thickness direction is formed in the center portion.
  • the LEDs 12 are arranged along the inner periphery of the light guide plate 13E.
  • the light guide plate 13E has an incident surface 13a, exit surfaces 13b and 13c, and a reflective surface 13d.
  • the incident surface 13a is disposed to face the LED 12.
  • the exit surfaces 13b and 13c are surfaces orthogonal to the entrance surface 13a.
  • the exit surface 13b emits light to the ceiling side, and the exit surface 13c emits light to the floor side.
  • the reflective surface 13d is a surface (surface in the front direction) facing the incident surface 13a. That is, the reflective surface 13d is formed on the entire outer periphery of the light guide plate 13E.
  • the reflecting surface 13d is not parallel to the incident surface 13a but is an inclined surface that is inclined with respect to a surface parallel to the incident surface 13a. In other words, it can be said that the reflecting surface 13d is an inclined surface inclined with respect to the emitting surfaces 13b and 13c.
  • the LEDs 12 provided along the opening O are also arranged in a circle.
  • the shape of the opening O and the arrangement shape of the LEDs 12 are not limited to this.
  • the opening O of the light guide plate 13E is not limited to a circle, but may be a polygonal shape (for example, a quadrangular to an octagonal shape) combining planes. In this case, you may arrange
  • the illumination module 11b also has the same effect as the illumination module 11 because light is emitted in the same manner as the illumination module 11.
  • the light guide plate 13E has an incident surface 13a facing the LED 12, two exit surfaces 13b and 13c orthogonal to the incident surface 13a, and an outer peripheral portion (circumferential portion) of the light guide plate 13E. It has a reflecting surface 13d that is provided and faces the incident surface 13a. Thereby, the illumination intensity directly under the illumination module 11b can be improved.
  • FIG. 9 is a diagram illustrating the illumination module 11c according to Embodiment 4, where (a) is a front view and (b) is an enlarged view of a broken line portion in (a).
  • the illumination module 11c of the present embodiment is that the notch 13g is formed in the light guide plate 13F, and the protrusion 14a that engages the notch 13g is formed in the holding member 14 in that the illumination module 11 of the first embodiment. And different.
  • the notch 13g is formed as a through hole having a shape in which the light guide plate 13F is notched.
  • the holding member 14 is formed with a protrusion 14a that is engaged with and fixed to the notch 13g.
  • the light guide plate 13F is positioned with respect to the holding member 14 by the engagement of the notch 13g and the protrusion 14a. That is, the protruding portion 14a is a positioning convex portion, and the notch 13g is a receiving portion of the protruding portion 14a.
  • the notch 13g is formed at a position inside the holding member 14. That is, the notch 13g is formed at the end of the light guide plate 13F on the incident surface 13a side. Two notches 13g are formed, and the distance between them is longer than the length of the LED 12 in the same direction. Thereby, the light which enters from the incident surface 13a and guides the inside of the light guide plate 13F can be emitted from the emission surfaces 13b and 13c to the irradiated surface without being limited by the notch 13g.
  • a reflecting member around the notch 13g.
  • a part of the light guided inside the light guide plate 13F reaches the notch 13g.
  • the light is emitted to the outside of the light guide plate 13F, and the emitted light may be absorbed by the holding member 14.
  • a reflective member is formed around the notch 13g, even if the light guided inside the light guide plate 13F reaches the notch 13g, the light can be reflected by the reflective member. As a result, it is possible to prevent the light from being taken out of the light guide plate 13F and absorbed by the holding member 14. Accordingly, it is possible to provide the illumination module 11c with high light utilization efficiency.
  • the LED 12 is fixed to the holding member 14 by means such as screwing or adhesive tape. For this reason, it is possible to accurately and easily align the LED 12 and the incident surface 13a of the light guide plate 13F by engaging the notch 13g and the protrusion 14a.
  • the protrusion 14a provided on the holding member 14 is engaged with the notch 13g of the light guide plate 13F, it is possible to prevent the light guide plate 13F from dropping from the holding member 14.
  • the protrusion 14a is used as an engaging means with the notch 13g of the light guide plate 13F.
  • the present invention is not limited to this, and the light guide plate 13F is removed from the holding member 14 such as using a screw. Any configuration can be used as long as it can be prevented.
  • the shape of the notch 13g is also U-shaped in the present embodiment, but is not limited thereto as long as it is a shape that can be engaged with a positioning structure such as the protrusion 14a.
  • the size, shape, position, and number of the protrusions 14a and the notches 13g may be appropriately set according to the specifications of the illumination module 11c.
  • FIG. 10A and 10B are diagrams showing a lighting fixture body 1a (lighting modules 11 and 11a) mounted on the lighting device according to Embodiment 5, where FIG. 10A is a front view and FIG. 10B is a cross-sectional view.
  • the same lighting module 11 was mounted on the lighting fixture body 1 of the first embodiment.
  • the lighting fixture body 1 may be mounted in combination with any of the lighting modules 11, 11a, 11b, and 11c of the first to fourth embodiments described above.
  • the luminaire main body 1a may be mounted with the illumination module 11 of the first embodiment and the illumination module 11a of the second embodiment.
  • the combination method of the illumination module mounted in the lighting fixture main body 1a is not limited only to this embodiment.
  • the number of lighting modules mounted on the lighting fixture body 1a is not limited to two, and may be three or more.
  • three lighting modules may be arranged so that the vertex of the equilateral triangle and the center of the lighting module substantially match, or four lighting modules such that the vertex of the square or rectangle and the center of the lighting module substantially match. May be arranged. That is, you may arrange
  • the illumination modules may be arranged so as to have the same height or different heights.
  • the lighting modules may be arranged in steps in the height direction.
  • the holding member 14 is also shared in the lighting fixture main body 1a. For this reason, the number of parts can be reduced, and the cost can be reduced even when a plurality of illumination modules are used.
  • the lighting module of each embodiment can be mounted as a light source module of various electronic devices including a lighting device. Thereby, the illuminance directly under the electronic device can be improved and a uniform illuminance distribution can be realized.
  • an illumination device including the LED 12 as a light source
  • the light source is not limited to the LED, and may be any light source that can couple light to the light guide plate, such as an organic EL.
  • a light source an incident surface on which light from the light source is incident, and a light source that is adjacent to the incident surface and is opposed to each other and emits light incident from the incident surface in different directions.
  • An illumination module including a light guide having a first emission surface and a second emission surface, wherein the light guide reflects light incident from the incident surface to a peripheral portion of the light guide and reflects the first light.
  • An illumination module comprising a reflecting surface that emits light from an exit surface.
  • the illumination module of (3) is an illumination module including a light source, a light guide means (light guide) having translucency, and a fixing member that fixes the light source and the light guide means.
  • the means includes a light incident surface (incident surface) opposed to the light source, a first surface (emitted surface) in contact with the light incident surface, a second surface (emitted surface) opposed to the first surface, and a first light guiding unit.
  • the amount of light emitted from the first light emitting region is equal to or greater than the amount of light emitted from the second light emitting region, and the main light emitting direction of the third light emitting region is the same direction as the light emitting side of the first light emitting region. It can also be said.
  • An illumination device including the illumination module according to any one of (1) to (4).
  • the present invention provides an illumination module capable of efficiently irradiating the floor surface with light from a light source without impairing design, and an illumination device including the illumination module. It can be used for electronic equipment.
  • An illumination module including a light source, a light guide (light guide means) having an incident surface on which light from the light source is incident, and an exit surface that emits light incident from the incident surface.
  • the light guide is provided on the front side and the side of the incident surface of the peripheral portion of the light guide, and reflects the light incident from the incident surface and emits the light from the output surface.
  • the illumination module is further characterized in that the reflecting surface is an inclined surface inclined with respect to the exit surface.
  • the light incident on the light guide means can be efficiently taken out by the reflecting surface, and an efficient illumination module with low power consumption and high illuminance can be provided. Further, it is possible to provide an illumination module that can extract light with a gentle illuminance distribution toward a target illumination area by a reflecting surface, has high performance, and can be used for a ceiling light or a pendant light.
  • the reflecting surface is configured by a flat surface and / or a curved surface.
  • the illumination module according to (6) or (7), wherein the reflective surface is provided with a light reflective material By making the reflective surface a light reflective material, light can be actively emitted from the light guide means toward the target illumination area, and an efficient illumination module can be provided.
  • a light scattering member is provided in the light guide and / or on the emission surface, and light incident on the light scattering member is scattered and emitted from the emission surface.
  • Any one illumination module is provided.
  • a light module with good performance that can illuminate not only the target illumination area but also the opposite side, in other words, the pendant light, not only the floor side but also the ceiling side, by emitting light from a surface other than the incident surface. Can be provided.
  • An illumination device including the illumination module according to any one of (6) to (10) and a lighting unit that turns on the light source. Accordingly, it is possible to provide an illumination device that is provided with an illumination module and a lighting unit and that can illuminate with a gentle illuminance distribution at low cost, such as wall surface illumination, pendant light, and ceiling light.
  • an illumination module having high performance using a simple and inexpensive method without impairing design.
  • This illumination module can be applied to an illumination device as a single product or in combination. Specifically, it is effective to apply to various illumination devices such as a pendant light, a ceiling light, or a wall surface illumination. By applying to such an illuminating device, it is possible to realize high designability, power saving, miniaturization, and uniform illuminance distribution of the device.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

L'invention porte sur un module d'éclairage, avec lequel module il est possible, avec une configuration simple, d'éclairer uniformément une large plage de projection, et sur un dispositif d'éclairage le comprenant. Ce module d'éclairage (11) comprend une face réfléchissante (13d) dans au moins une partie de la partie de bord de périphérie d'une plaque de guidage de lumière (13), qui réfléchit une lumière qui entre à partir d'une face d'entrée (13a) et qui émet celle-ci par l'intermédiaire d'une face d'émission (13c). La face de réflexion (13d) est formée à partir d'une face oblique qui est oblique par rapport à la face d'émission (13c).
PCT/JP2012/083015 2012-02-29 2012-12-20 Module d'éclairage et dispositif d'éclairage le comprenant Ceased WO2013128761A1 (fr)

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JP2012044614A JP2013182729A (ja) 2012-02-29 2012-02-29 照明モジュールおよびそれを備えた照明装置
JP2012-044614 2012-02-29

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EP2982899A1 (fr) * 2014-08-07 2016-02-10 Zumtobel Lighting GmbH Éclairage plat de presentation
DE202016100565U1 (de) * 2016-02-04 2017-05-05 Zumtobel Lighting Gmbh Lichtleiterelement sowie Leuchte mit einem Lichtleiterelement
CN107559655A (zh) * 2017-10-26 2018-01-09 江苏达伦电子股份有限公司 台灯顶部导光板及台灯
JP2021057562A (ja) * 2019-09-30 2021-04-08 日亜化学工業株式会社 発光モジュール
DE102020204577A1 (de) 2020-04-09 2021-10-14 Volkswagen Aktiengesellschaft Lichtleiteranordnung, Kantenauskopplungselement und Beleuchtungssystem für ein Fahrzeug
US11561338B2 (en) 2019-09-30 2023-01-24 Nichia Corporation Light-emitting module

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JP2015099760A (ja) * 2013-11-20 2015-05-28 シャープ株式会社 光源モジュール及び照明機器
JP6511244B2 (ja) * 2014-10-10 2019-05-15 株式会社小糸製作所 照明用光ガイド
JP6598022B2 (ja) * 2016-02-17 2019-10-30 パナソニックＩｐマネジメント株式会社 照明器具

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JP2004296347A (ja) * 2003-03-27 2004-10-21 Toto Ltd 面発光装置
JP2006351354A (ja) * 2005-06-16 2006-12-28 Toppan Printing Co Ltd 導光板とそれを用いたエッジライト型面光源および液晶表示装置
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Publication number Priority date Publication date Assignee Title
EP2982899A1 (fr) * 2014-08-07 2016-02-10 Zumtobel Lighting GmbH Éclairage plat de presentation
DE202016100565U1 (de) * 2016-02-04 2017-05-05 Zumtobel Lighting Gmbh Lichtleiterelement sowie Leuchte mit einem Lichtleiterelement
AT16724U1 (de) * 2016-02-04 2020-07-15 Zumtobel Lighting Gmbh Lichtleiterelement sowie Leuchte mit einem Lichtleiterelement
CN107559655A (zh) * 2017-10-26 2018-01-09 江苏达伦电子股份有限公司 台灯顶部导光板及台灯
CN107559655B (zh) * 2017-10-26 2023-11-24 江苏达伦电子股份有限公司 台灯顶部导光板及台灯
JP2021057562A (ja) * 2019-09-30 2021-04-08 日亜化学工業株式会社 発光モジュール
US11561338B2 (en) 2019-09-30 2023-01-24 Nichia Corporation Light-emitting module
JP7213454B2 (ja) 2019-09-30 2023-01-27 日亜化学工業株式会社 発光モジュール
DE102020204577A1 (de) 2020-04-09 2021-10-14 Volkswagen Aktiengesellschaft Lichtleiteranordnung, Kantenauskopplungselement und Beleuchtungssystem für ein Fahrzeug

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