WO2016125511A1 - Illumination device - Google Patents

Illumination device Download PDF

Info

Publication number
WO2016125511A1
WO2016125511A1 PCT/JP2016/050144 JP2016050144W WO2016125511A1 WO 2016125511 A1 WO2016125511 A1 WO 2016125511A1 JP 2016050144 W JP2016050144 W JP 2016050144W WO 2016125511 A1 WO2016125511 A1 WO 2016125511A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light distribution
distribution member
emitting diode
lighting device
Prior art date
Application number
PCT/JP2016/050144
Other languages
French (fr)
Japanese (ja)
Inventor
尾山　和也
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
Priority to JP2016573237A priority Critical patent/JP6404369B2/en
Publication of WO2016125511A1 publication Critical patent/WO2016125511A1/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • 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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof

Definitions

  • the present invention relates to a lighting device using LEDs.
  • a straight tube type fluorescent lamp has been used as a light source of an illumination device.
  • the fluorescent lamp has a light distribution characteristic with no directivity, and was able to emit light uniformly in all directions around the tube.
  • a lighting device having a light distribution characteristic having no directivity it is possible to irradiate in all directions with uniformly irradiated light, and thus has been used for ceiling lighting, signboard interior lighting, showcase lighting, and the like. It was.
  • FIG. 12 shows the structure of a conventional lighting device
  • FIG. 12 (a) is a schematic perspective view
  • FIG. 12 (b) is a partially enlarged sectional view showing a light source inside the lighting device.
  • the lighting device 1 has a structure in which a light source 3 such as a straight tube fluorescent lamp is attached by a holder 4 inside a cover 2 that diffuses light.
  • FIG. 13 is a schematic cross-sectional view showing light distribution in the illumination device 1 when a straight tube fluorescent lamp is used as the light source 3.
  • the irradiation light 3a is emitted uniformly in all directions around the fluorescent lamp.
  • the light amount of the irradiation light 3a is large and brightest because it is located in front of the light source 3.
  • the front end region 2b of the cover 2 is bright with little unevenness
  • the side region 2c has a certain level of brightness
  • the rear region 2d is also light. Is irradiated.
  • a light source having a uniform light distribution characteristic in all directions is suitable for the purpose of irradiating the whole without any unevenness, and is particularly effective for lighting a signboard or a showcase.
  • a fluorescent lamp is used as the light source 3
  • the lighting device is installed at a high position such as a signboard, the replacement cost of the fluorescent lamp is required. Therefore, the maintenance cost becomes high.
  • the light from the fluorescent lamp contains ultraviolet light, there is a problem that it is easy to attract insects when installed outdoors.
  • light emitting diodes are often used as the light source of lighting devices. Since the light-emitting diode can be designed to contain almost no ultraviolet light and has a long life, it is expected that many of the problems when using a fluorescent lamp as a light source can be solved. However, the light emitted from the light emitting diode is generally highly directional, bright in a specific light emitting direction, but lacks light in other directions.
  • FIG. 14 is a schematic cross-sectional view showing light distribution in the illumination device 1 when a light-emitting diode is used as the light source 3.
  • a light-emitting diode is used as the light source 3.
  • irradiation light 3b having strong directivity is emitted forward as shown in FIG.
  • the amount of irradiation light 3a is extremely large and extremely bright. Further, since the irradiation light 3a has a strong directivity to the front, both the front end region 2b and the side surface region 2c of the cover 2 are dark, and the rear region 2d is not directly irradiated with light from the light source 3.
  • a lighting device with a light distribution with high directivity is not suitable for an application that needs to irradiate light on the entire cover 2, and in particular, a fluorescent lamp is used for an interior lighting of a signboard or illumination of a showcase. It is difficult to replace with a light emitting diode.
  • FIG. 15 is a schematic cross-sectional view showing a light emitting diode having improved directivity using a lens.
  • an LED (Light Emitting Diode) chip 6 is mounted on an array substrate 5 on which wiring is formed, and a lens 7 is disposed so as to cover the LED chip 6.
  • FIG. 16 is a graph showing the light distribution characteristics of the emitted light from the light emitting diode package 8.
  • the lens 7 for controlling the light distribution from the LED chip 6 needs to be individually designed according to the light distribution characteristics, chip size, etc. of the LED chip 6, and high processing accuracy is required, so that it is expensive. There was a problem of becoming. Further, in order to obtain a desired light distribution characteristic, it is necessary to perform accurate positioning, and man-hours such as attachment of the array substrate 5 and electrical connection between the plurality of light emitting diode packages 8 are also required. There was also a problem that cost reduction was difficult.
  • FIG. 18 is a graph showing the light distribution characteristics of such an LED lamp.
  • FIG. 19 is a schematic cross-sectional view showing the light distribution in the illumination device 1 when an LED lamp having a wide light distribution characteristic is used as the light source 3.
  • the irradiation light 3c is emitted not only to the front but also to the side and rear.
  • the light amount of the irradiation light 3a is large and very bright because it is located in front of the light source 3.
  • the irradiation light 3c is also irradiated to the side, a certain amount of light is also irradiated to the front end region 2b of the cover 2 to ensure a certain level of brightness.
  • the light irradiated to the side surface region 2c and the back surface region 2d is not sufficient, and unevenness of the light occurs as a whole.
  • the directivity in the light distribution of the light emitting diode cannot be sufficiently lowered, so that there is a sufficient problem that light irradiation from the illumination device is uneven. It has not been solved.
  • the lighting positions of a plurality of light emitting diodes can be visually recognized as grains from the outside, and the glare is increased due to reflection on the object irradiated with light. This is not desirable as a characteristic of the lighting device.
  • An object of the present invention is to provide an illuminating device that can irradiate light toward the rear and the rear and that is difficult to visually recognize the lighting position as a grain and can suppress glare and glare.
  • a lighting device of the present invention has a light distribution having a plurality of light emitting diode elements arranged in series and having at least two flat light diffusion surfaces for diffusing light from the light emitting diode elements.
  • the light distribution member is integrally formed of the same material, and the longitudinal direction extends in the arrangement direction of the plurality of light emitting diode elements and is arranged substantially in parallel.
  • the light from the light emitting diode is diffused by the light distribution member integrally formed of the same material, so that the directivity of the light distribution characteristic is reduced and the side and back are also reduced. It is possible to irradiate light, it is difficult to visually recognize the lighting position of the light emitting diode as a grain, and glare and glare can be suppressed.
  • the light distribution member can have a simple configuration and can be easily assembled.
  • the light distribution member has a continuous V-shaped portion in which the light diffusing surface continues through a ridge line portion, and is emitted from the array of the plurality of light emitting diode elements.
  • the light distribution member is arranged so that light is incident on the inner angle side of the V-shaped cross section.
  • the light distribution member has a cylindrical shape having a continuous cross-sectional triangle shape in which the light diffusing surfaces are connected via three ridge lines, and the light emitting diode element is disposed on an array substrate.
  • the array substrate is further placed on a base substrate, and the surface of the base substrate opposite to the surface on which the array substrate is placed is in contact with the inner surface of the light distribution member.
  • the light distribution member has a trapezoidal section in which three flat portions are continuous via a ridge portion, and the light emitted from the array of the plurality of light emitting diode elements.
  • the light distribution member is arranged so that is incident on the inner angle side of the trapezoidal cross section.
  • the light emitting diode element is disposed on an array substrate, the array substrate is further mounted on a base substrate, and a cross section of the light distribution member has the plurality of light beams.
  • the width of the diffusion surface is different, and the diffusion surface has an asymmetric shape with respect to a straight line passing through the center of the base substrate and perpendicular to the base substrate.
  • the present invention it is easy to assemble with a simple configuration, and even when a light emitting diode is used as a light source, the directivity of the light distribution characteristic can be reduced to irradiate light to the side and the back, It is possible to provide an illuminating device that can make it difficult to visually recognize the lighting position as a grain and can suppress glare and glare.
  • the schematic cross section which shows the illuminating device of 1st Embodiment.
  • the schematic cross section which shows the scattering of the light in the illuminating device of 1st Embodiment.
  • the graph which shows the light distribution characteristic in the cross-sectional direction in the whole illuminating device.
  • the schematic perspective view which shows the state which attached the cover to the illuminating device.
  • the partial expanded sectional view which shows the attachment structure of an illuminating device.
  • the schematic cross section which showed the light distribution in the lighting fixture using the illuminating device of 1st Embodiment.
  • the graph which shows the light distribution characteristic of an illuminating device when the vertex angle of a light distribution member is 20 degree
  • the graph which shows the light distribution characteristic of an illuminating device when the vertex angle of a light distribution member is 30 degree
  • the graph which shows the light distribution characteristic of an illuminating device when the vertex angle of a light distribution member is 60 degree
  • FIG. 12A is a schematic perspective view of a conventional lighting device
  • FIG. 12B is a partial enlarged cross-sectional view showing a light source inside the conventional lighting device.
  • the schematic cross section which showed the light distribution in the illuminating device at the time of using a straight tube
  • the schematic cross section which showed the light distribution in the illuminating device at the time of using a light emitting diode as a light source.
  • the schematic cross section which shows the light emitting diode which improved the directivity using the lens.
  • the graph which shows the light distribution characteristic of the emitted light from a light emitting diode package.
  • FIG. 23A is a diagram showing a case where the illumination device of the first embodiment is used as illumination for a showcase
  • FIG. 23B is a case where the illumination device of the sixth embodiment is used as illumination for a showcase.
  • FIG. 1 is a schematic cross-sectional view showing a lighting device 10 according to a first embodiment of the present invention.
  • the illumination device 10 includes a light distribution member 11, a plurality of LEDs 12, an array substrate 13, and a base substrate 14.
  • the light distribution member 11 is a member for diffusing the light from the LED 12, and is formed into a cylindrical shape having a triangular cross section by connecting the three flat plate portions 11a, which are light diffusing surfaces, at the ridge line portion 11b.
  • the flat plate portion 11a and the ridge line portion 11b are integrally formed of the same material, and a cavity 11c is formed inside.
  • a plurality of LEDs 12, an array substrate 13, and a base substrate 14 are arranged inside the cavity 11c.
  • the light distribution member 11 has a function of diffusing and transmitting the light from the LED 12 inside, and is preferably a milky white resin or the like for ease of molding, and a resin or the like in which a scattering material is mixed in the resin is used. Can do. Although the material is not particularly limited, a material similar to that used for a general ceiling light cover (for example, trade names “ML-3107ZHP”, “ML-2120ZHP”, “ML-3500ZAH”, manufactured by Teijin Ltd.) Can be used. As the material used for the light distribution member 11, the density of the milky white color is selected according to the degree to which light is diffused and the application.
  • the light distribution member 11 When the light distribution member 11 is formed of such a resin material that diffuses light, a long cylindrical shape having a triangular cross-section can be easily formed using a technique such as extrusion molding, and is used for lens molding. Such high precision and correspondingly expensive molds are not required, the time required for molding can be shortened, and productivity and workability can be greatly improved. In addition, since the light distribution member 11 is not a lens but a member that scatters light, processing accuracy and optical precision required for lens molding are not required, and some unevenness and streaks are required during extrusion molding. Even if this occurs, the characteristics of the entire light distribution member 11 are allowed.
  • the optical design can be given a degree of freedom, and precise assembly processes such as accurate alignment of the LED and the lens and alignment of the optical axis are not required, and the configuration is simple. Easy assembly is possible.
  • the LED 12 is a light emitting diode package or a light emitting diode chip that emits a specific color when supplied with current.
  • a specific color a single color or a combination of a plurality of light emitting diode chips can be used.
  • white light is emitted as the lighting device, a light emitting diode package using a combination of an LED chip that emits blue light, violet light, ultraviolet light, or the like and a wavelength conversion member such as a phosphor can be used.
  • the array substrate 13 is an electrically connected substrate on which the LEDs 12 are mounted, and is a substrate made of an insulator such as ceramic or glass epoxy resin, a flexible substrate having flexibility, or a composite in which metal is separated by an insulator. A substrate or the like can be used.
  • the plurality of LEDs 12 mounted on the array substrate 13 are electrically connected to each other by wiring formed on the array substrate, thereby forming a circuit such as a series or a parallel circuit.
  • the base substrate 14 is a member in which the array substrate 13 is mounted on the front surface side and is in contact with the inner surface of the light distribution member 11.
  • the material of the base substrate 14 is not particularly limited, but it is desirable to have appropriate heat dissipation, rigidity, and reflection characteristics, and metal, ceramic, or the like can be used.
  • the back surface side of the base substrate 14 on which the LEDs 12 and the array substrate 13 are not mounted is in contact with the inner surface of one surface (bottom surface) of the flat plate portion 11 a constituting the light distribution member 11.
  • that the light distribution member 11 and the base substrate 14 are in contact may be in direct contact with each other, or may be in contact through an adhesive material or the like.
  • the width of the base substrate 14 is preferably approximately the same as the inner dimension of the flat plate-like portion 11 a that is the bottom surface of the light distribution member 11.
  • the length of the base substrate 14 is preferably approximately the same as the length of the light distribution member 11.
  • a base substrate 14 on which the array substrate 13 and the LEDs 12 are mounted is disposed, and both ends of the light distribution member 11 are sealed with a sealing member or the like. Thereby, it can prevent that a water
  • FIG. 2 is a schematic cross-sectional view showing light scattering in the illumination device 10 of the first embodiment.
  • the light 15 from the LED 12 travels as shown by arrows in FIG. 2 and reaches the inner surface of the light distribution member 11, propagates through the light distribution member 11, undergoes scattering and dispersion, and has various directions.
  • the light distribution 16 proceeds to the outside and is irradiated to the outside. At this time, the light incident on the plate-like portion 11a, which is a light diffusion surface, has a light distribution centered in the direction perpendicular to the surface.
  • the light irradiation from the LED 12 has an intensity distribution determined by the light distribution characteristic of the LED 12 itself, and the flat portion 11 a other than the bottom surface of the light distribution member 11. Further, the light travels in the direction of the ridge line portion 11b (vertical angle) facing the bottom surface, and is irradiated to the outside by being affected by scattering and dispersion in each incident region. Also, some of the light emitted from the LED 12 is reflected inside and there is also light emitted from the light distribution member 11 to the inside, but many of them enter the light distribution member 11 and are scattered and similarly irradiated to the outside.
  • the ridge line portion 11b vertical angle
  • FIG. 3 is a graph showing the light distribution characteristics in the cross-sectional direction of the entire lighting device 10. Concentric scales extending outward from the center of the circle indicate the light intensity, and the light distribution is indicated by a solid line with the vertical direction below the bottom being 0 degrees, the horizontal direction being 90 degrees, and the vertical direction being 180 degrees. FIG. 3 shows a case where the angle formed by the ridge line portion 11b (vertical angle) facing the bottom surface is 50 degrees.
  • the light distribution characteristics of the entire illumination device 10 are as shown in FIG.
  • the amount of light in the direction decreases, the amount of light in the oblique front is large, there is a sufficient amount of light on the side, and a certain amount of light is irradiated on the back.
  • FIG. 4 is a schematic perspective view showing a state in which the cover 18 is attached to the lighting device 10
  • FIG. 5 is a partial enlarged cross-sectional view showing the attachment structure of the lighting device 10.
  • the lighting device 10 has a plurality of LEDs 12 arranged inside a long cylindrical light distribution member 11 having a triangular cross section.
  • the array substrate 13, the base substrate 14, and the sealing members at both ends are omitted. Terminal portions electrically connected to the inside protrude from both ends of the lighting device 10 and are connected to the outside of the lighting device 10 to supply current.
  • the lighting device 10 is disposed so as to be sandwiched by a holder 17 at a substantially central portion in the cover 18.
  • the holder 17 has a structure similar to a member that holds a normal fluorescent lamp, and is biased by a spring in a closing direction by a pair of curved opening and closing plates to hold the lighting device 10 and apply a force in the opening direction.
  • the lighting device 10 can be attached or removed.
  • the cover 18 can be made of milky white resin material or the like used in ordinary lighting equipment. For applications such as signs, decorations and characters are drawn on the surface of the cover 18.
  • FIG. 6 is a schematic cross-sectional view illustrating light distribution in a lighting fixture using the lighting device 10 of the present embodiment.
  • the irradiation light 19 from the illumination device 10 has a light distribution as shown in FIG. Therefore, a sufficient amount of light is also applied to the front central region 18a of the cover 18, but it is not extremely bright compared to other regions. Further, since the illumination device 10 illuminates strong light obliquely forward, the front end region 18b is also irradiated with a sufficient amount of light. Thereby, uniform light can be irradiated with little unevenness in brightness on the front surface of the cover 18.
  • the side region 18c of the cover 18 can also be irradiated brightly. Further, since a certain amount of light is also emitted from the illumination device 10 to the back surface area 18d, the entire cover 18 can be irradiated with light scattered or reflected by the back surface area 18d. As described above, by using the lighting device 10 of the present embodiment, it is possible to reduce unevenness in brightness over the entire area of the cover 18 of the lighting fixture.
  • the light distribution member 11 of the illumination device 10 is made of a milky white material, and can scatter light from the LED 12 to sufficiently reduce the directivity in the orientation distribution. Thereby, even if the lighting fixture using the illuminating device 10 is observed from the outside of the cover 18, the lighting positions of the plurality of LEDs 12 are not visually recognized as grains, and glare and glare can be suppressed. It is also preferred when used for case illumination.
  • FIGS. 7A to 7H are graphs showing the light distribution characteristics of the lighting device 10 when the angle of the apex angle of the light distribution member 11 is changed, and the apex angles are 20 degrees, 30 degrees, 40 degrees, 50 degrees, The cases of 60 degrees, 70 degrees, 80 degrees, and 90 degrees are shown.
  • the light distribution member 11 has two flat plate-like portions 11a that are light diffusion surfaces, and the apex angle of the V-shaped cross section is continuous at the ridge line portion 11b. Irradiated to the inner side of the V shape.
  • the orientation distribution can be adjusted as shown in FIGS. 7A to 7H.
  • the orientation distribution can also be adjusted by appropriately selecting the material and thickness of the light distribution member 11.
  • the lighting device of the present invention is easy to assemble with a simple configuration, can reduce the directivity of the light distribution characteristics, and can irradiate light to the side and the rear, and the lighting position can be adjusted to the grain size. It is difficult to visually recognize and can suppress glare and glare.
  • FIG. 8 is a schematic cross-sectional view showing the lighting device 20 according to the second embodiment of the present invention.
  • the lighting device 20 includes a light distribution member 21, a plurality of LEDs 22, an array substrate 23, and a base substrate 24.
  • the light distribution member 21 is a member for diffusing the light from the LED 22, and two flat plate-like portions 21 a that are light diffusion surfaces are connected by a ridge line portion 21 b to form a long shape with a V-shaped cross section. .
  • the flat plate portion 21a and the ridge line portion 21b are integrally formed of the same material, and the apex angle is formed by the ridge line portion 21b.
  • a plurality of LEDs 22 are mounted on the array substrate 23, and the array substrate 23 is mounted on the base substrate 24.
  • the base substrate 24 forms the bottom surface of the lighting device 20, and the light distribution member 21 is also attached to the base substrate 24 by a fixing member such as an adhesive.
  • the base substrate 24 since the base substrate 24 is exposed to the outside as a bottom surface, it is easy to dissipate heat generated by light emission of the LED 12 from the back surface of the base substrate 24 to the outside. Since the LED 12 has a characteristic that the light emission efficiency and the light emission wavelength change depending on the temperature change, by exposing the base substrate 24 from the back surface and dissipating heat, the LED 12 is prevented from becoming high temperature and the lighting device 20 is stabilized. It becomes easy to operate. If a member such as a heat radiating fin is attached to the back surface of the base substrate 24 as necessary, the heat dissipation can be further improved.
  • FIG. 9 is a schematic cross-sectional view showing the assembly of the lighting device 20.
  • the long light distribution member 21 having a V-shaped cross section can be easily formed using a technique such as extrusion molding.
  • the light distribution member 21 is previously formed of a resin material that diffuses light, and the light distribution member 21 is attached to the base substrate 24 on which the LEDs 22 and the array substrate 23 are mounted. It is preferable that the width of the base substrate 24 is substantially equal to the opening width of the light distribution member 21, and the length of the base substrate 24 is approximately the same as the length of the light distribution member 21.
  • a cylindrical shape with a triangular cross section is obtained.
  • the LED 22 and the light distribution member 21 can be easily positioned simply by aligning the edges of the light distribution member 21 and the base substrate 24.
  • an adhesive is applied over the entire length of the light distribution member 21 and the base substrate 24, and both ends of the light distribution member 21 are sealed with a sealing member or the like. Thereby, it can prevent that a water
  • the light distribution member 21 has two flat plate-like portions 21a, which are light diffusion surfaces, continuously formed by a ridge line portion 21b to have a V-shaped apex angle, and light from the LED 22 has a V-shaped cross section. Irradiated to the inner corner of the shape.
  • the orientation distribution can be adjusted as shown in FIGS. 7A to 7H.
  • the orientation distribution can be adjusted by appropriately selecting the material and thickness of the light distribution member 21. Therefore, a complicated optical design as in the case of adjusting the orientation distribution by the lens is not required, and the desired orientation distribution can be easily realized only by changing the apex angle and forming the light distribution member 21 by extrusion molding. Can do.
  • the lighting device of the present invention is easy to assemble with a simple configuration, can reduce the directivity of the light distribution characteristics, and can irradiate light to the side and the rear, and the lighting position can be adjusted to the grain size. It is difficult to visually recognize and can suppress glare and glare.
  • FIG. 10 is a schematic cross-sectional view showing the illumination device 30 according to the third embodiment of the present invention.
  • the illumination device 30 includes a light distribution member 31, a plurality of LEDs 32, an array substrate 33, and a base substrate 34.
  • the light distribution member 31 is a member for diffusing the light from the LED 32.
  • the flat plate portion 31a and the flat plate portion 31d which are light diffusion surfaces, are connected by a ridge line portion 31b to form a trapezoidal cylindrical shape. Yes.
  • the flat plate portions 31a and 31d and the ridge line portion 31b are integrally formed of the same material, the flat plate portion 31d forms a narrow bottom surface, and a cavity 31c is formed inside.
  • a plurality of LEDs 32 are mounted on the array substrate 33, the array substrate 33 is mounted on the base substrate 34, and the base substrate 34 is mounted on the bottom surface where the light distribution member 31 is wide.
  • Light from the LED 32 is irradiated toward the inner surface of the light distribution member 31, reaches the inner surface of the light distribution member 31, propagates through the light distribution member 31, travels in various directions under the action of scattering and dispersion.
  • the light distribution 36 is applied to the outside. At this time, the light that has entered the flat plate portion 31a and the flat plate portion 31d, which are light diffusion surfaces, has a light distribution centered in the direction perpendicular to the surface.
  • the light distribution member 31 since the light distribution member 31 has a trapezoidal cross section, the light irradiated forward from the LED 32 reaches the flat plate portion 31d and is scattered. Therefore, the light from the LED 32 is subjected to the scattering action by the flat plate portion 31d which is the top surface in addition to the scattering action by the flat plate portion 31a inclined with respect to the bottom surface. Thereby, the light quantity ahead of the illuminating device 30 can be changed by selecting the width
  • the light distribution member 31 has the plate-like portions 31a and 31d which are light diffusion surfaces continuous at the ridge line portion 31b, and the light from the LED 32 is irradiated to the inner angle side of the top surface.
  • the orientation distribution can be adjusted as shown in FIGS. 7A to 7H.
  • the orientation distribution can also be adjusted by appropriately selecting the material and thickness of the light distribution member 31. Therefore, a complicated optical design like adjustment of the orientation distribution by the lens is not required, and the desired orientation can be easily achieved by changing the apex angle and the top surface width and forming the light distribution member 31 by extrusion molding. Distribution can be realized.
  • the lighting device of the present invention is easy to assemble with a simple configuration, can reduce the directivity of the light distribution characteristics, and can irradiate light to the side and the rear, and the lighting position can be adjusted to the grain size. It is difficult to visually recognize and can suppress glare and glare.
  • FIG. 11 is a schematic cross-sectional view showing a lighting device 40 according to a fourth embodiment of the present invention.
  • the illumination device 40 includes a light distribution member 41, a plurality of LEDs 42, an array substrate 43, a base substrate 44, and a shielding member 47.
  • the light distribution member 41 is a member for diffusing light from the LED 42, and the flat plate portion 41a and the flat plate portion 41d, which are light diffusion surfaces, are connected by a ridge line portion 41b to form a cylindrical shape with a trapezoidal cross section. Yes.
  • the flat plate portions 41a and 41d and the ridge line portion 41b are integrally formed of the same material, the flat plate portion 41d forms a narrow bottom surface, and a cavity 41c is formed inside.
  • a plurality of LEDs 42 are mounted on the array substrate 43, the array substrate 43 is mounted on the base substrate 44, and the base substrate 44 is mounted on the bottom surface where the light distribution member 41 is wide.
  • a shielding member 47 is attached along the inner side of the flat plate portion 41d.
  • the shielding member 47 is a member for shielding light from the LED 42, and is formed of a material that does not transmit light. It is preferable to use a material that reflects light, such as metal, as the shielding member 47 because light traveling in the direction of the flat plate portion 41d can be reflected in the direction of the flat plate portion 41a and light can be used effectively.
  • the light from the LED 42 is irradiated toward the inner surface of the light distribution member 41, and the light that has reached the inner surface of the light distribution member 41 propagates through the light distribution member 41 and is subjected to the effects of scattering and dispersion in various directions.
  • the light distribution 46 proceeds to the outside and is irradiated to the outside.
  • the light incident on the flat plate portion 41a which is a light diffusion surface, has a light distribution centered in the direction perpendicular to the surface.
  • the light traveling in the direction of the flat plate portion 41d reaches the shielding member 47 and is shielded or reflected, it does not enter the flat plate portion 41d that is the top surface. Therefore, the light from the LED 42 is scattered by the flat plate portion 41a inclined with respect to the bottom surface, and is not scattered by the flat plate portion 41d that is the top surface. Thereby, the light quantity ahead of the illuminating device 40 can be changed by selecting the width
  • the light distribution member 41 has flat portions 41a and 41d which are light diffusing surfaces continuous at the ridge line portion 41b, and the light from the LED 42 is irradiated to the inner angle side of the top surface.
  • the orientation distribution can be adjusted as shown in FIGS. 7A to 7H.
  • the orientation distribution can be adjusted by appropriately selecting the material and thickness of the light distribution member 41. Therefore, a complicated optical design like adjustment of the orientation distribution by the lens is not required, and the light distribution member 41 is formed by extrusion by changing the angle of the apex angle and the width of the apex surface, and the shielding member 47 is selected. A desired orientation distribution can be easily realized only by this.
  • the lighting device of the present invention is easy to assemble with a simple configuration, can reduce the directivity of the light distribution characteristics, and can irradiate light to the side and the rear, and the lighting position can be adjusted to the grain size. It is difficult to visually recognize and can suppress glare and glare.
  • FIG. 20 is a schematic cross-sectional view showing a lighting device 50 according to a fifth embodiment of the present invention.
  • the lighting device 50 includes a light distribution member 51, a plurality of LEDs 52, an array substrate 53, and a base substrate 54.
  • the light distribution member 51 is a member for diffusing the light from the LED 52.
  • the three flat plate-like portions 51a that are light diffusion surfaces are connected by the connecting portion 51b and are triangular in cross section. It has a cylindrical shape.
  • the flat plate-like portion 51a is formed of the same material, but is not integrally formed. That is, the light distribution member 51 has a cylindrical shape in which a cavity 51c is formed by connecting flat plate portions 51a, which are individual flat plate members, with the connecting portions 51b. You may use materials, such as an adhesive agent and putty, for the connection part 51b.
  • the connecting portion 51b may be formed by fusing the end portions of the flat plate portion 51a.
  • a plurality of LEDs 52, an array substrate 53, and a base substrate 54 are arranged inside the cavity 51c.
  • the light distribution member 51 may be configured to have a long V-shaped cross section by connecting two flat portions 51a, which are light diffusing surfaces, with connecting portions 51b. Good.
  • the base substrate 54 forms the bottom surface of the lighting device 50, and the light distribution member 51 is also attached to the base substrate 54 by a fixing member such as an adhesive.
  • the base substrate 54 and the light distribution member 51 having a V-shaped cross section are formed in a cylindrical shape having a hollow cross-section inside.
  • the lighting device of the present invention is easy to assemble with a simple configuration, can reduce the directivity of the light distribution characteristics, and can irradiate light to the side and the rear, and the lighting position can be adjusted to the grain size. It is difficult to visually recognize and can suppress glare and glare.
  • FIG. 21 is a schematic cross-sectional view showing a lighting device 60 according to a sixth embodiment of the present invention.
  • the illumination device 60 includes a light distribution member 61, a plurality of LEDs 62, an array substrate 63, and a base substrate 64.
  • the light distribution member 61 is a member for diffusing the light from the LED 62, and the plate-like portions 61a and 61d, which are light diffusion surfaces, are connected by a ridge line portion 61b to form a long shape with a V-shaped cross section. .
  • the flat plate-like parts 61a and 61d and the ridge line part 61b are integrally formed of the same material, and the apex angle is formed by the ridge line part 61b.
  • a plurality of LEDs 62 are mounted on the array substrate 63, and the array substrate 63 is mounted on the base substrate 64.
  • the base substrate 64 forms the bottom surface of the lighting device 60, and the light distribution member 61 is also attached to the base substrate 64 by a fixing member such as an adhesive.
  • the light distribution member 11 is symmetrical with respect to a straight line that passes through the center of the base substrate 14 and is perpendicular to the base substrate 14.
  • the width dimensions of the plate-like portions 61 a and 61 d in the light distribution member 61 are different and pass through the center of the base substrate 64 and perpendicular to the base substrate 64. Asymmetrical with respect to a straight line.
  • FIG. 22 is a graph showing the light distribution characteristics in the cross-sectional direction of the entire illumination device 60.
  • the light distribution characteristic of the entire illumination device 60 is such that the amount of light in the apex direction decreases, the amount of light in the oblique front is large, the amount of light is sufficiently in the side, and the amount of light in the back is also some. Is distributed.
  • the cross-sectional shape of the light distribution member 61 is asymmetric, the amount of light to the side is also asymmetrical.
  • the orientation distribution can be adjusted by determining the width dimension ratio of the flat plate-like portions 61a and 61d.
  • the lighting device 60 is effective in, for example, a use of irradiating a product (food, etc.) in a case and a signboard disposed at the top of the case at the same time in a showcase or the like.
  • FIG. 23A shows a display case having a signboard portion 70 at the top and displaying the product 80 therein, and simultaneously illuminating the signboard portion 70 and the product 80 using the lighting device 10 according to the first embodiment. It is a figure which shows the case where it does.
  • the lighting device 10 is disposed above the inside of the showcase. As described above, when the lighting device 10 is used, the distribution of light distribution is a right and left target, so that there may be a situation in which the signboard unit 70 has a lot of illumination and the product 80 has little illumination.
  • FIG.23 (b) is a figure which shows the case where the illuminating device 60 in 6th Embodiment is used in the same showcase.
  • the light distribution can be adjusted so as to be left and right non-target. Therefore, the lighting for the signboard unit 70 is reduced and the lighting for the product 80 is increased. Both the sign part 70 and the product 80 can be illuminated with good balance.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

This illumination device (10) comprises a light distributing member (11) provided with: a plurality of light-emitting diode elements (12) that are arranged in series; and at least two plate-like light diffusing surfaces (11a) that diffuse light from the light-emitting diode elements (12). The light distributing member (11) is arranged such that the longitudinal direction thereof is substantially parallel to the arrangement of the plurality of light-emitting diode elements (12).

Description

照明装置Lighting device
　本発明は、ＬＥＤを用いた照明装置に関する。 The present invention relates to a lighting device using LEDs.
　従来から照明装置の光源として、直管型の蛍光灯などが用いられていた。蛍光灯は指向性のない配光特性であり、管を中心として全方向に均等に光を出射することができた。このような指向性のない配光特性の照明装置では、均等に照射された光で全方向を照射することができるため、天井照明や看板の内照灯、ショーケースの照明などに用いられてきた。 Conventionally, a straight tube type fluorescent lamp has been used as a light source of an illumination device. The fluorescent lamp has a light distribution characteristic with no directivity, and was able to emit light uniformly in all directions around the tube. In such a lighting device having a light distribution characteristic having no directivity, it is possible to irradiate in all directions with uniformly irradiated light, and thus has been used for ceiling lighting, signboard interior lighting, showcase lighting, and the like. It was.
　図１２は従来の照明装置の構造を示しており、図１２（ａ）は概略斜視図であり図１２（ｂ）は照明装置内部での光源を示す部分拡大断面図である。照明装置１は、光を拡散するカバー２の内部に直管型蛍光灯などの光源３が保持具４によって取り付けられた構造をしている。図１３は、光源３として直管型蛍光灯を用いた場合の照明装置１での配光を示した模式断面図である。 FIG. 12 shows the structure of a conventional lighting device, FIG. 12 (a) is a schematic perspective view, and FIG. 12 (b) is a partially enlarged sectional view showing a light source inside the lighting device. The lighting device 1 has a structure in which a light source 3 such as a straight tube fluorescent lamp is attached by a holder 4 inside a cover 2 that diffuses light. FIG. 13 is a schematic cross-sectional view showing light distribution in the illumination device 1 when a straight tube fluorescent lamp is used as the light source 3.
　カバー２の背面側に取り付けられた光源３からは、蛍光灯を中心として全方向に均等に照射光３ａが出射される。カバー２の前面中央領域２ａでは、光源３の正面に位置しているため照射光３ａの光量が多く最も明るくなる。また、照射光３ａが全方向に対して均等であることから、カバー２の前面端部領域２ｂでもムラが少なく明るくなり、側面領域２ｃでもある程度の明るさとなり、背面領域２ｄに対しても光が照射される。 From the light source 3 attached to the back side of the cover 2, the irradiation light 3a is emitted uniformly in all directions around the fluorescent lamp. In the front center region 2a of the cover 2, the light amount of the irradiation light 3a is large and brightest because it is located in front of the light source 3. Further, since the irradiation light 3a is uniform in all directions, the front end region 2b of the cover 2 is bright with little unevenness, the side region 2c has a certain level of brightness, and the rear region 2d is also light. Is irradiated.
　このような全方向に均一な配光特性の光源を用いることは、全体をムラなく照射するための用途に適しており、特に看板の内照灯やショーケースの照明などにおいて効果的である。しかし、光源３として蛍光灯を用いると、省エネルギー性能の向上には限界がある。また、１～２年に１回程度の頻度で蛍光灯を交換する必要があり、看板などのように照明装置が高い位置に設置されている場合には、蛍光灯の交換費用が必要となるためメンテナンス費用が高額になってしまう。また、蛍光灯からの光には紫外光が含まれているために、屋外に設置されていると虫を引き寄せやすいという問題があった。 Using such a light source having a uniform light distribution characteristic in all directions is suitable for the purpose of irradiating the whole without any unevenness, and is particularly effective for lighting a signboard or a showcase. However, when a fluorescent lamp is used as the light source 3, there is a limit to improving the energy saving performance. In addition, it is necessary to replace the fluorescent lamp about once every one to two years. When the lighting device is installed at a high position such as a signboard, the replacement cost of the fluorescent lamp is required. Therefore, the maintenance cost becomes high. Further, since the light from the fluorescent lamp contains ultraviolet light, there is a problem that it is easy to attract insects when installed outdoors.
　そこで近年では、照明装置の光源として発光ダイオードを用いたものが採用されることが多くなってきた。発光ダイオードは紫外光をほぼ含まないように設計でき、かつ長寿命なため、光源として蛍光灯を用いた場合の課題の多くを解決できると見込まれる。しかし、発光ダイオードからの出射光は一般的に指向性が高く、特定の発光方向に対しては明るいが他の方向には光量が不足してしまう。 Therefore, in recent years, light emitting diodes are often used as the light source of lighting devices. Since the light-emitting diode can be designed to contain almost no ultraviolet light and has a long life, it is expected that many of the problems when using a fluorescent lamp as a light source can be solved. However, the light emitted from the light emitting diode is generally highly directional, bright in a specific light emitting direction, but lacks light in other directions.
　図１４は、光源３として発光ダイオードを用いた場合の照明装置１での配光を示した模式断面図である。カバー２の背面側に発光ダイオードを直列に配置した光源では、図１４に示すように前方に強い指向性のある照射光３ｂが出射される。 FIG. 14 is a schematic cross-sectional view showing light distribution in the illumination device 1 when a light-emitting diode is used as the light source 3. In the light source in which the light emitting diodes are arranged in series on the back side of the cover 2, irradiation light 3b having strong directivity is emitted forward as shown in FIG.
　カバー２の前面中央領域２ａでは、光源３の正面に位置しているため照射光３ａの光量が非常に多く極端に明るくなる。また、照射光３ａが前方に強い指向性であることから、カバー２の前面端部領域２ｂでも側面領域２ｃでも暗く、背面領域２ｄに対しては光源３から直接光が照射されない。このような指向性の高い配光の照明装置は、カバー２全体に光を照射する必要がある用途には適しておらず、特に看板の内照灯やショーケースの照明などにおいては蛍光灯を発光ダイオードに置き換えることが困難である。 Since the front center area 2a of the cover 2 is located in front of the light source 3, the amount of irradiation light 3a is extremely large and extremely bright. Further, since the irradiation light 3a has a strong directivity to the front, both the front end region 2b and the side surface region 2c of the cover 2 are dark, and the rear region 2d is not directly irradiated with light from the light source 3. Such a lighting device with a light distribution with high directivity is not suitable for an application that needs to irradiate light on the entire cover 2, and in particular, a fluorescent lamp is used for an interior lighting of a signboard or illumination of a showcase. It is difficult to replace with a light emitting diode.
　特許文献１などでは、このような指向性の高い発光ダイオードの欠点を解決するため、レンズ等を用いて発光ダイオードからの配光特性を制御することが提案されている。図１５は、レンズを用いて指向性を改善した発光ダイオードを示す模式断面図である。発光ダイオードパッケージ８は、配線が形成された配列基板５上にＬＥＤ（Light Emitting Diode）チップ６を搭載し、ＬＥＤチップ６を覆うようにレンズ７が配置されている。図１６は発光ダイオードパッケージ８からの出射光の配光特性を示すグラフである。ＬＥＤチップ６から前方方向へ出射された光は、レンズ７で横方向に配光されるために、配列基板５に垂直な方向（グラフ上方の１８０度方向）への光量が減少し横方向（グラフ側方の９０度方向）への光量が増加している。特許文献１等では、図１７に示すように発光ダイオードパッケージ８を複数配置して照明装置の光源として用いている。 In Patent Document 1 and the like, it is proposed to control the light distribution characteristics from the light emitting diodes using a lens or the like in order to solve the disadvantages of such light emitting diodes with high directivity. FIG. 15 is a schematic cross-sectional view showing a light emitting diode having improved directivity using a lens. In the light emitting diode package 8, an LED (Light Emitting Diode) chip 6 is mounted on an array substrate 5 on which wiring is formed, and a lens 7 is disposed so as to cover the LED chip 6. FIG. 16 is a graph showing the light distribution characteristics of the emitted light from the light emitting diode package 8. Since the light emitted from the LED chip 6 in the forward direction is distributed in the lateral direction by the lens 7, the amount of light in the direction perpendicular to the array substrate 5 (180-degree direction above the graph) is reduced and the lateral direction ( The amount of light in the 90 ° direction on the side of the graph is increasing. In Patent Document 1 and the like, a plurality of light emitting diode packages 8 are arranged and used as a light source of an illumination device as shown in FIG.
　しかし、ＬＥＤチップ６からの配光を制御するためのレンズ７は、ＬＥＤチップ６の配光特性やチップサイズ等に応じて個別に設計する必要があり、高い加工精度も要求されるため高価になるという問題があった。また、所望の配光特性を得るためには正確な位置決めをする必要もあり、配列基板５の取付けや複数個の発光ダイオードパッケージ８同士の電気的接続などの工数も必要となるため、全体としてコスト低減が難しいという問題もあった。 However, the lens 7 for controlling the light distribution from the LED chip 6 needs to be individually designed according to the light distribution characteristics, chip size, etc. of the LED chip 6, and high processing accuracy is required, so that it is expensive. There was a problem of becoming. Further, in order to obtain a desired light distribution characteristic, it is necessary to perform accurate positioning, and man-hours such as attachment of the array substrate 5 and electrical connection between the plurality of light emitting diode packages 8 are also required. There was also a problem that cost reduction was difficult.
　最近になって、広い配光特性のＬＥＤランプを用いたものが提供されるようになってきている。図１８はこのようなＬＥＤランプの配光特性を示すグラフである。図１９は、光源３として広い配光特性のＬＥＤランプを用いた場合の照明装置１での配光を示した模式断面図である。 Recently, LED lamps with wide light distribution characteristics have been provided. FIG. 18 is a graph showing the light distribution characteristics of such an LED lamp. FIG. 19 is a schematic cross-sectional view showing the light distribution in the illumination device 1 when an LED lamp having a wide light distribution characteristic is used as the light source 3.
　広い配光特性のＬＥＤランプでは、図１９に示すように前方だけではなく側方や後方に対しても照射光３ｃが出射される。カバー２の前面中央領域２ａでは、光源３の正面に位置しているため照射光３ａの光量が多くとても明るくなる。また、照射光３ｃが側方にも照射されることから、カバー２の前面端部領域２ｂにもある程度の光が照射されて多少の明るさを確保できる。しかし側面領域２ｃや背面領域２ｄに対して照射される光は十分ではなく全体として光のムラが生じてしまう。 In an LED lamp having a wide light distribution characteristic, as shown in FIG. 19, the irradiation light 3c is emitted not only to the front but also to the side and rear. In the front center region 2a of the cover 2, the light amount of the irradiation light 3a is large and very bright because it is located in front of the light source 3. Moreover, since the irradiation light 3c is also irradiated to the side, a certain amount of light is also irradiated to the front end region 2b of the cover 2 to ensure a certain level of brightness. However, the light irradiated to the side surface region 2c and the back surface region 2d is not sufficient, and unevenness of the light occurs as a whole.
　上述したように、発光ダイオードを光源とする従来技術では、発光ダイオードの配光分布における指向性を十分に低下できていないため、照明装置からの光照射にムラができてしまうという問題を十分に解消できていない。特にショーケースの照明や天井照明に用いる際には、外部から複数の発光ダイオードの点灯位置が粒として視認できて眩しく感じることや、光を照射される対象で反射してグレアが多くなってしまうという問題があり、照明装置の特性として好ましくなかった。 As described above, in the conventional technology using a light emitting diode as a light source, the directivity in the light distribution of the light emitting diode cannot be sufficiently lowered, so that there is a sufficient problem that light irradiation from the illumination device is uneven. It has not been solved. In particular, when used for showcase lighting or ceiling lighting, the lighting positions of a plurality of light emitting diodes can be visually recognized as grains from the outside, and the glare is increased due to reflection on the object irradiated with light. This is not desirable as a characteristic of the lighting device.
特開２０１４－１６５１４０号公報JP 2014-165140 A
　そこで、本発明は、上記従来の問題点に鑑みなされたものであり、簡便な構成で組立も容易であり、発光ダイオードを光源として用いた場合にも配光特性の指向性を低減させて側方や後方に対しても光を照射することができ、点灯位置を粒として視認しにくく眩しさやグレアを抑制できる照明装置を提供することを目的とする。 Therefore, the present invention has been made in view of the above-described conventional problems, and is easy to assemble with a simple configuration. Even when a light emitting diode is used as a light source, the directivity of the light distribution characteristic is reduced. An object of the present invention is to provide an illuminating device that can irradiate light toward the rear and the rear and that is difficult to visually recognize the lighting position as a grain and can suppress glare and glare.
　上記課題を解決するために、本発明の照明装置は、複数の発光ダイオード素子が直列状に配列され、前記発光ダイオード素子からの光を拡散する平板状の光拡散面を少なくとも２つ有する配光部材を備え、前記配光部材は同一材料で一体に形成されて、長尺方向が前記複数の発光ダイオード素子の配列方向に延び、かつ略平行に配されていることを特徴とする。 In order to solve the above problems, a lighting device of the present invention has a light distribution having a plurality of light emitting diode elements arranged in series and having at least two flat light diffusion surfaces for diffusing light from the light emitting diode elements. The light distribution member is integrally formed of the same material, and the longitudinal direction extends in the arrangement direction of the plurality of light emitting diode elements and is arranged substantially in parallel.
　このような本発明の照明装置では、同一材料で一体に形成した配光部材により発光ダイオードからの光を拡散することから、配光特性の指向性を低減させて側方や後方に対しても光を照射することができ、発光ダイオードの点灯位置を粒として視認しにくくでき、眩しさやグレアを抑制できる。また、配光部材を簡便な構成とすることができ、組立も容易となる。 In such a lighting device of the present invention, the light from the light emitting diode is diffused by the light distribution member integrally formed of the same material, so that the directivity of the light distribution characteristic is reduced and the side and back are also reduced. It is possible to irradiate light, it is difficult to visually recognize the lighting position of the light emitting diode as a grain, and glare and glare can be suppressed. In addition, the light distribution member can have a simple configuration and can be easily assembled.
　また、本発明の一実施態様では、前記配光部材は、前記光拡散面が稜線部を介して連なる連続した断面Ｖ字形状の部分を有し、前記複数の発光ダイオード素子の配列から出射した光が前記断面Ｖ字形状の内角側に対して入射されるように、前記配光部材が配置されている。 In one embodiment of the present invention, the light distribution member has a continuous V-shaped portion in which the light diffusing surface continues through a ridge line portion, and is emitted from the array of the plurality of light emitting diode elements. The light distribution member is arranged so that light is incident on the inner angle side of the V-shaped cross section.
　また、本発明の一実施態様では、前記配光部材は、前記光拡散面が３つの稜線部を介して連なる連続した断面三角形状の筒状であり、前記発光ダイオード素子は、配列基板上に配置され、前記配列基板はさらにベース基板上に載置されており、前記ベース基板は、前記配列基板を載置した面と反対側の面が前記配光部材の内側面に接している。 In one embodiment of the present invention, the light distribution member has a cylindrical shape having a continuous cross-sectional triangle shape in which the light diffusing surfaces are connected via three ridge lines, and the light emitting diode element is disposed on an array substrate. The array substrate is further placed on a base substrate, and the surface of the base substrate opposite to the surface on which the array substrate is placed is in contact with the inner surface of the light distribution member.
　また、本発明の一実施態様では、前記配光部材は、３つの平板状部分が稜線部を介して連続した断面台形状の部分を有し、前記複数の発光ダイオード素子の配列から出射した光が前記断面台形状の内角側に対して入射されるように、前記配光部材が配置されている。 In one embodiment of the present invention, the light distribution member has a trapezoidal section in which three flat portions are continuous via a ridge portion, and the light emitted from the array of the plurality of light emitting diode elements. The light distribution member is arranged so that is incident on the inner angle side of the trapezoidal cross section.
　また、本発明の一実施態様では、前記発光ダイオード素子は、配列基板上に配置され、前記配列基板はさらにベース基板上に載置されており、前記配光部材の断面は、前記複数の光拡散面の幅が異なるものであり、前記ベース基板の中央を通り、かつ、ベース基板に垂直な直線に対して非対称形状となっている。 In one embodiment of the present invention, the light emitting diode element is disposed on an array substrate, the array substrate is further mounted on a base substrate, and a cross section of the light distribution member has the plurality of light beams. The width of the diffusion surface is different, and the diffusion surface has an asymmetric shape with respect to a straight line passing through the center of the base substrate and perpendicular to the base substrate.
　本発明では、簡便な構成で組立も容易であり、発光ダイオードを光源として用いた場合にも配光特性の指向性を低減させて側方や後方に対しても光を照射することができ、点灯位置を粒として視認しにくくでき、眩しさやグレアを抑制できる照明装置を提供することができる。 In the present invention, it is easy to assemble with a simple configuration, and even when a light emitting diode is used as a light source, the directivity of the light distribution characteristic can be reduced to irradiate light to the side and the back, It is possible to provide an illuminating device that can make it difficult to visually recognize the lighting position as a grain and can suppress glare and glare.
第１実施形態の照明装置を示す模式断面図。The schematic cross section which shows the illuminating device of 1st Embodiment. 第１実施形態の照明装置における光の散乱を示す模式断面図。The schematic cross section which shows the scattering of the light in the illuminating device of 1st Embodiment. 照明装置全体での断面方向での配光特性を示すグラフ。The graph which shows the light distribution characteristic in the cross-sectional direction in the whole illuminating device. 照明装置にカバーを取り付けた状態を示す模式斜視図。The schematic perspective view which shows the state which attached the cover to the illuminating device. 照明装置の取り付け構造を示す部分拡大断面図。The partial expanded sectional view which shows the attachment structure of an illuminating device. 第１実施形態の照明装置を用いた照明器具での配光を示した模式断面図。The schematic cross section which showed the light distribution in the lighting fixture using the illuminating device of 1st Embodiment. 配光部材の頂角が２０度のときの照明装置の配光特性を示すグラフ。The graph which shows the light distribution characteristic of an illuminating device when the vertex angle of a light distribution member is 20 degree | times. 配光部材の頂角が３０度のときの照明装置の配光特性を示すグラフ。The graph which shows the light distribution characteristic of an illuminating device when the vertex angle of a light distribution member is 30 degree | times. 配光部材の頂角が４０度のときの照明装置の配光特性を示すグラフ。The graph which shows the light distribution characteristic of an illuminating device when the vertex angle of a light distribution member is 40 degree | times. 配光部材の頂角が５０度のときの照明装置の配光特性を示すグラフ。The graph which shows the light distribution characteristic of an illuminating device when the vertex angle of a light distribution member is 50 degree | times. 配光部材の頂角が６０度のときの照明装置の配光特性を示すグラフ。The graph which shows the light distribution characteristic of an illuminating device when the vertex angle of a light distribution member is 60 degree | times. 配光部材の頂角が７０度のときの照明装置の配光特性を示すグラフ。The graph which shows the light distribution characteristic of an illuminating device when the vertex angle of a light distribution member is 70 degree | times. 配光部材の頂角が８０度のときの照明装置の配光特性を示すグラフ。The graph which shows the light distribution characteristic of an illuminating device when the vertex angle of a light distribution member is 80 degree | times. 配光部材の頂角が９０度のときの照明装置の配光特性を示すグラフ。The graph which shows the light distribution characteristic of an illuminating device when the vertex angle of a light distribution member is 90 degree | times. 第２実施形態の照明装置を示す模式断面図。The schematic cross section which shows the illuminating device of 2nd Embodiment. 第２実施形態の照明装置の組み立てを示す模式断面図。The schematic cross section which shows the assembly of the illuminating device of 2nd Embodiment. 第３実施形態の照明装置を示す模式断面図。The schematic cross section which shows the illuminating device of 3rd Embodiment. 第４実施形態の照明装置を示す模式断面図。The schematic cross section which shows the illuminating device of 4th Embodiment. 図１２（ａ）は従来の照明装置の概略斜視図で、図１２（ｂ）は従来の照明装置の内部での光源を示す部分拡大断面図。FIG. 12A is a schematic perspective view of a conventional lighting device, and FIG. 12B is a partial enlarged cross-sectional view showing a light source inside the conventional lighting device. 光源として直管型蛍光灯を用いた場合の照明装置での配光を示した模式断面図。The schematic cross section which showed the light distribution in the illuminating device at the time of using a straight tube | pipe type fluorescent lamp as a light source. 光源として発光ダイオードを用いた場合の照明装置での配光を示した模式断面図。The schematic cross section which showed the light distribution in the illuminating device at the time of using a light emitting diode as a light source. レンズを用いて指向性を改善した発光ダイオードを示す模式断面図。The schematic cross section which shows the light emitting diode which improved the directivity using the lens. 発光ダイオードパッケージからの出射光の配光特性を示すグラフ。The graph which shows the light distribution characteristic of the emitted light from a light emitting diode package. 発光ダイオードパッケージを複数配置して光源として用いた照明装置の斜視図。The perspective view of the illuminating device which has arrange | positioned multiple light emitting diode packages and used as a light source. ＬＥＤランプの配光特性を示すグラフ。The graph which shows the light distribution characteristic of an LED lamp. 光源として広い配光特性のＬＥＤランプを用いた場合の照明装置での配光を示した模式断面図。The schematic cross section which showed the light distribution in the illuminating device at the time of using the LED lamp of a wide light distribution characteristic as a light source. 図２０（ａ），（ｂ）は、第５実施形態の照明装置を示す模式断面図。20 (a) and 20 (b) are schematic cross-sectional views showing the illumination device of the fifth embodiment. 第６実施形態の照明装置を示す模式断面図。The schematic cross section which shows the illuminating device of 6th Embodiment. 第６実施形態の照明装置全体での断面方向での配光特性を示すグラフ。The graph which shows the light distribution characteristic in the cross-sectional direction in the whole illuminating device of 6th Embodiment. 図２３（ａ）はショーケースの照明として第１実施形態の照明装置を用いた場合を示す図で、図２３（ｂ）はショーケースの照明として第６実施形態の照明装置を用いた場合を示す図。FIG. 23A is a diagram showing a case where the illumination device of the first embodiment is used as illumination for a showcase, and FIG. 23B is a case where the illumination device of the sixth embodiment is used as illumination for a showcase. FIG.
　（第１実施形態）
　以下、本発明の第１実施形態について、図面を参照して詳細に説明する。図１は、本発明の第１実施形態の照明装置１０を示す模式断面図である。照明装置１０は、配光部材１１と、複数のＬＥＤ１２と、配列基板１３と、ベース基板１４とを備えている。 (First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a lighting device 10 according to a first embodiment of the present invention. The illumination device 10 includes a light distribution member 11, a plurality of LEDs 12, an array substrate 13, and a base substrate 14.
　配光部材１１は、ＬＥＤ１２からの光を拡散するための部材であり、光拡散面である３つの平板状部分１１ａが稜線部１１ｂで接続されて断面三角形状の筒状をなしている。平板状部分１１ａおよび稜線部１１ｂは、同一材料で一体に形成されて内部に空洞１１ｃが形成されている。空洞１１ｃの内部には、複数のＬＥＤ１２と、配列基板１３と、ベース基板１４が配置されている。 The light distribution member 11 is a member for diffusing the light from the LED 12, and is formed into a cylindrical shape having a triangular cross section by connecting the three flat plate portions 11a, which are light diffusing surfaces, at the ridge line portion 11b. The flat plate portion 11a and the ridge line portion 11b are integrally formed of the same material, and a cavity 11c is formed inside. A plurality of LEDs 12, an array substrate 13, and a base substrate 14 are arranged inside the cavity 11c.
　配光部材１１は、ＬＥＤ１２からの光を内部で拡散して透過する機能を有しており、成型の容易性から乳白色の樹脂等が好ましく、樹脂中に散乱材を混入した樹脂などを用いることができる。特に材料は限定されないが、一般的なシーリングライトのカバーに利用されるものと同様の材料（例えば、商品名「ＭＬ－３１０７ＺＨＰ」「ＭＬ－２１２０ＺＨＰ」「ＭＬ－３５００ＺＡＨ」、帝人株式会社製）を用いることができる。配光部材１１に用いる材料としては、光を拡散させる程度や用途に応じて乳白色の色の濃さを選択する。 The light distribution member 11 has a function of diffusing and transmitting the light from the LED 12 inside, and is preferably a milky white resin or the like for ease of molding, and a resin or the like in which a scattering material is mixed in the resin is used. Can do. Although the material is not particularly limited, a material similar to that used for a general ceiling light cover (for example, trade names “ML-3107ZHP”, “ML-2120ZHP”, “ML-3500ZAH”, manufactured by Teijin Ltd.) Can be used. As the material used for the light distribution member 11, the density of the milky white color is selected according to the degree to which light is diffused and the application.
　このような光を拡散する樹脂材料で配光部材１１を形成すると、押し出し成型などの手法を用いて容易に断面三角形状の長尺な筒状を形成することができ、レンズの成型に用いられるような高精度でその分高価な金型を必要とせず、成型に要する時間も短縮でき生産性と加工性を大幅に向上できる。また、配光部材１１としてレンズではなく光を散乱させる部材を用いていることから、レンズの成型に要求されるほどの加工精度や光学的精密さは必要なく、押し出し成型時に多少の凹凸や筋が生じても配光部材１１全体の特性としては許容される。したがって、本発明の配光部材１１を用いると、光学設計に自由度をもたせることができ、ＬＥＤとレンズの正確な位置合わせや光軸合わせなどの精密な組立工程も不要となり、簡便な構成で容易に組立てることが可能となる。 When the light distribution member 11 is formed of such a resin material that diffuses light, a long cylindrical shape having a triangular cross-section can be easily formed using a technique such as extrusion molding, and is used for lens molding. Such high precision and correspondingly expensive molds are not required, the time required for molding can be shortened, and productivity and workability can be greatly improved. In addition, since the light distribution member 11 is not a lens but a member that scatters light, processing accuracy and optical precision required for lens molding are not required, and some unevenness and streaks are required during extrusion molding. Even if this occurs, the characteristics of the entire light distribution member 11 are allowed. Therefore, when the light distribution member 11 of the present invention is used, the optical design can be given a degree of freedom, and precise assembly processes such as accurate alignment of the LED and the lens and alignment of the optical axis are not required, and the configuration is simple. Easy assembly is possible.
　ＬＥＤ１２は、電流を供給されて特定色を発光する発光ダイオードパッケージもしくは発光ダイオードチップである。照明装置１０として特定の色のみを発光する場合には単色もしくは複数の発光ダイオードチップの組み合わせを用いることができる。また、照明装置として白色を発光する場合には、青色光や紫色光、紫外光などを発光するＬＥＤチップと蛍光体などの波長変換部材の組み合わせによる発光ダイオードパッケージを用いることができる。 The LED 12 is a light emitting diode package or a light emitting diode chip that emits a specific color when supplied with current. When the lighting device 10 emits only a specific color, a single color or a combination of a plurality of light emitting diode chips can be used. Further, when white light is emitted as the lighting device, a light emitting diode package using a combination of an LED chip that emits blue light, violet light, ultraviolet light, or the like and a wavelength conversion member such as a phosphor can be used.
　配列基板１３は、ＬＥＤ１２が搭載されて電気的に接続される基板であり、セラミックやガラスエポキシ樹脂などの絶縁体からなる基板や、可撓性を有するフレキシブル基板、金属を絶縁体で分離した複合基板などを用いることができる。配列基板１３に搭載された複数のＬＥＤ１２は、配列基板上に形成された配線によって相互に電気的に接続されて、直列や並列などの回路を構成する。 The array substrate 13 is an electrically connected substrate on which the LEDs 12 are mounted, and is a substrate made of an insulator such as ceramic or glass epoxy resin, a flexible substrate having flexibility, or a composite in which metal is separated by an insulator. A substrate or the like can be used. The plurality of LEDs 12 mounted on the array substrate 13 are electrically connected to each other by wiring formed on the array substrate, thereby forming a circuit such as a series or a parallel circuit.
　ベース基板１４は、表面側に配列基板１３が搭載されて配光部材１１の内側面に接する部材である。ベース基板１４の材料としては特に限定されないが、適度な放熱性や剛性、反射特性を有することが望ましく、金属やセラミックなどを用いることができる。ＬＥＤ１２および配列基板１３が搭載されていないベース基板１４の裏面側は、配光部材１１を構成している平板状部分１１ａの１つの面（底面）の内側に接している。ここで、配光部材１１とベース基板１４とが接しているとは両者が直接接触していてもよく、接着材料などを介して接触していてもよい。 The base substrate 14 is a member in which the array substrate 13 is mounted on the front surface side and is in contact with the inner surface of the light distribution member 11. The material of the base substrate 14 is not particularly limited, but it is desirable to have appropriate heat dissipation, rigidity, and reflection characteristics, and metal, ceramic, or the like can be used. The back surface side of the base substrate 14 on which the LEDs 12 and the array substrate 13 are not mounted is in contact with the inner surface of one surface (bottom surface) of the flat plate portion 11 a constituting the light distribution member 11. Here, that the light distribution member 11 and the base substrate 14 are in contact may be in direct contact with each other, or may be in contact through an adhesive material or the like.
　ベース基板１４の幅は、配光部材１１の底面である平板状部分１１ａの内寸と略同程度とすることが好ましい。また、ベース基板１４の長さは、配光部材１１の長さと同程度とすることが好ましい。これにより、ベース基板１４上に配列基板１３およびＬＥＤ１２を搭載した後に、配光部材１１にベース基板１４を挿入するだけで容易にＬＥＤ１２と配光部材１１の位置決めをすることができる。 The width of the base substrate 14 is preferably approximately the same as the inner dimension of the flat plate-like portion 11 a that is the bottom surface of the light distribution member 11. The length of the base substrate 14 is preferably approximately the same as the length of the light distribution member 11. As a result, the LED 12 and the light distribution member 11 can be easily positioned by simply inserting the base substrate 14 into the light distribution member 11 after mounting the array substrate 13 and the LEDs 12 on the base substrate 14.
　配光部材１１の空洞１１ｃ内部には、配列基板１３およびＬＥＤ１２を搭載したベース基板１４が配置され、配光部材１１の両端部を封止部材等で封止している。これにより、配光部材１１の内部に水分が進入することを防止でき、防湿性および防滴性を向上できる。 In the cavity 11c of the light distribution member 11, a base substrate 14 on which the array substrate 13 and the LEDs 12 are mounted is disposed, and both ends of the light distribution member 11 are sealed with a sealing member or the like. Thereby, it can prevent that a water | moisture content penetrates into the inside of the light distribution member 11, and can improve moisture resistance and drip-proof property.
　図２は、第１実施形態の照明装置１０における光の散乱を示す模式断面図である。ＬＥＤ１２に電力が供給されて発光すると、ＬＥＤ１２から配光部材１１の内面に向かって光が照射される。ＬＥＤ１２からの光１５は、図２中に矢印で示すように進行して配光部材１１の内面に到達し、配光部材１１の内部を伝搬して散乱および分散の作用を受けて様々な方向に進行する配光１６となり外部に照射される。このとき、光拡散面である平板状部分１１ａに入射した光は、面に対して垂直方向が中心となるような配光となる。 FIG. 2 is a schematic cross-sectional view showing light scattering in the illumination device 10 of the first embodiment. When power is supplied to the LED 12 to emit light, light is emitted from the LED 12 toward the inner surface of the light distribution member 11. The light 15 from the LED 12 travels as shown by arrows in FIG. 2 and reaches the inner surface of the light distribution member 11, propagates through the light distribution member 11, undergoes scattering and dispersion, and has various directions. The light distribution 16 proceeds to the outside and is irradiated to the outside. At this time, the light incident on the plate-like portion 11a, which is a light diffusion surface, has a light distribution centered in the direction perpendicular to the surface.
　図２中では光１５として矢印を２本しか描いていないが、ＬＥＤ１２からの光照射は、ＬＥＤ１２自体の配光特性によって決まる強度分布となって、配光部材１１の底面以外の平板状部分１１ａおよび底面に対向する稜線部１１ｂ（頂角）方向に進行し、入射した各領域で散乱および分散の作用を受けて外部に照射される。またＬＥＤ１２から出た光の一部は内部で反射され、また配光部材１１から内部に放射される光もあるが、これらの多くも配光部材１１に入り散乱され、同様に外部に照射される。 Although only two arrows are drawn as the light 15 in FIG. 2, the light irradiation from the LED 12 has an intensity distribution determined by the light distribution characteristic of the LED 12 itself, and the flat portion 11 a other than the bottom surface of the light distribution member 11. Further, the light travels in the direction of the ridge line portion 11b (vertical angle) facing the bottom surface, and is irradiated to the outside by being affected by scattering and dispersion in each incident region. Also, some of the light emitted from the LED 12 is reflected inside and there is also light emitted from the light distribution member 11 to the inside, but many of them enter the light distribution member 11 and are scattered and similarly irradiated to the outside. The
　図３は、照明装置１０全体での断面方向での配光特性を示すグラフである。円の中心から外側に向かう同心円の目盛りは光強度を示し、底面の鉛直下方を０度として水平方向を９０度とし、鉛直上方を１８０度とした配光分布が実線で示されている。図３では、底面に対向する稜線部１１ｂ（頂角）が成す角が５０度の場合を示している。 FIG. 3 is a graph showing the light distribution characteristics in the cross-sectional direction of the entire lighting device 10. Concentric scales extending outward from the center of the circle indicate the light intensity, and the light distribution is indicated by a solid line with the vertical direction below the bottom being 0 degrees, the horizontal direction being 90 degrees, and the vertical direction being 180 degrees. FIG. 3 shows a case where the angle formed by the ridge line portion 11b (vertical angle) facing the bottom surface is 50 degrees.
　上述したように、ＬＥＤ１２からの光は配光部材１１の底面以外の平板状部分１１ａおよび頂角で散乱されるため、照明装置１０全体の配光特性は、図３に示したように頂角方向での光量が減少し、斜め前方の光量が多く、側方にも十分に光量があり、後方にもある程度の光量が照射される分布となっている。 As described above, since the light from the LED 12 is scattered at the flat plate portion 11a other than the bottom surface of the light distribution member 11 and the apex angle, the light distribution characteristics of the entire illumination device 10 are as shown in FIG. The amount of light in the direction decreases, the amount of light in the oblique front is large, there is a sufficient amount of light on the side, and a certain amount of light is irradiated on the back.
　図４は、照明装置１０にカバー１８を取り付けた状態を示す模式斜視図であり、図５は照明装置１０の取り付け構造を示す部分拡大断面図である。前示したよう、照明装置１０は、断面三角形状で長尺な筒状の配光部材１１の内部に複数のＬＥＤ１２が配置されている。図４中では、配列基板１３、ベース基板１４および両端部の封止部材は省略している。照明装置１０の両端部からは内部と電気的に接続された端子部が突出して設けられており、照明装置１０の外部と接続されて電流が供給される。 FIG. 4 is a schematic perspective view showing a state in which the cover 18 is attached to the lighting device 10, and FIG. 5 is a partial enlarged cross-sectional view showing the attachment structure of the lighting device 10. As previously shown, the lighting device 10 has a plurality of LEDs 12 arranged inside a long cylindrical light distribution member 11 having a triangular cross section. In FIG. 4, the array substrate 13, the base substrate 14, and the sealing members at both ends are omitted. Terminal portions electrically connected to the inside protrude from both ends of the lighting device 10 and are connected to the outside of the lighting device 10 to supply current.
　照明装置１０はカバー１８内の略中央部に保持具１７によって挟持されて配置されている。保持具１７は通常の蛍光灯を保持する部材と類似の構造であり、一対の湾曲した開閉板で閉じる方向にバネで付勢されて照明装置１０を挟持するとともに、開く方向に力を加えることで照明装置１０を取り付けることや取り外すことができる。カバー１８には、通常の照明器具に用いられる乳白色の樹脂材料等を用いることができ、看板などの用途ではカバー１８の表面に装飾や文字が描かれる。 The lighting device 10 is disposed so as to be sandwiched by a holder 17 at a substantially central portion in the cover 18. The holder 17 has a structure similar to a member that holds a normal fluorescent lamp, and is biased by a spring in a closing direction by a pair of curved opening and closing plates to hold the lighting device 10 and apply a force in the opening direction. The lighting device 10 can be attached or removed. The cover 18 can be made of milky white resin material or the like used in ordinary lighting equipment. For applications such as signs, decorations and characters are drawn on the surface of the cover 18.
　図６は、本実施形態の照明装置１０を用いた照明器具での配光を示した模式断面図である。照明装置１０からの照射光１９は、図３に示したような配光分布となっている。したがって、カバー１８の前面中央領域１８ａにも十分な光量が照射されるが、他の領域と比較して極端に明るくなることはない。また、照明装置１０からは斜め前方に対して強い光を照らされることから、前面端部領域１８ｂにも十分な光量が照射される。これにより、カバー１８の前面での明るさにムラが少なく均一な光を照射することができる。 FIG. 6 is a schematic cross-sectional view illustrating light distribution in a lighting fixture using the lighting device 10 of the present embodiment. The irradiation light 19 from the illumination device 10 has a light distribution as shown in FIG. Therefore, a sufficient amount of light is also applied to the front central region 18a of the cover 18, but it is not extremely bright compared to other regions. Further, since the illumination device 10 illuminates strong light obliquely forward, the front end region 18b is also irradiated with a sufficient amount of light. Thereby, uniform light can be irradiated with little unevenness in brightness on the front surface of the cover 18.
　また、カバー１８の側面領域１８ｃに対しても、照明装置１０から側方に照射される光量が十分なので、側面領域１８ｃも明るく照射することができる。さらに、背面領域１８ｄに対しても照明装置１０からある程度の光量が照射されることから、背面領域１８ｄで散乱または反射された光によってカバー１８全体を照射できる。このよう本実施形態の照明装置１０を用いることで、照明器具のカバー１８全領域にわたって明るさのムラを低減することができる。 Also, since the amount of light irradiated from the lighting device 10 to the side is sufficient for the side region 18c of the cover 18, the side region 18c can also be irradiated brightly. Further, since a certain amount of light is also emitted from the illumination device 10 to the back surface area 18d, the entire cover 18 can be irradiated with light scattered or reflected by the back surface area 18d. As described above, by using the lighting device 10 of the present embodiment, it is possible to reduce unevenness in brightness over the entire area of the cover 18 of the lighting fixture.
　照明装置１０の配光部材１１は乳白色の材料で形成されており、ＬＥＤ１２からの光を散乱して配向分布における指向性を十分に低減できる。これにより、照明装置１０を用いた照明器具をカバー１８の外部から観察しても、複数のＬＥＤ１２の点灯位置を粒として視認することがなく、眩しさやグレアを抑制でき、看板や天井照明、ショーケースの照明に用いる場合にも好ましい。 The light distribution member 11 of the illumination device 10 is made of a milky white material, and can scatter light from the LED 12 to sufficiently reduce the directivity in the orientation distribution. Thereby, even if the lighting fixture using the illuminating device 10 is observed from the outside of the cover 18, the lighting positions of the plurality of LEDs 12 are not visually recognized as grains, and glare and glare can be suppressed. It is also preferred when used for case illumination.
　図７Ａ乃至図７Ｈは、配光部材１１の頂角の角度を変えた場合の照明装置１０の配光特性を示すグラフであり、それぞれ頂角が２０度、３０度、４０度、５０度、６０度、７０度、８０度、９０度の場合を示している。図１に示したように、配光部材１１は光拡散面である２つの平板状部分１１ａが稜線部１１ｂで連続して断面Ｖ字形状の頂角となっており、ＬＥＤ１２からの光は断面Ｖ字形状の内角側に対して照射される。この頂角の角度を決定することで、図７Ａ乃至図７Ｈのように配向分布を調整することができる。また、配光部材１１の材料や厚さを適宜選択することでも配向分布を調整することができる。 7A to 7H are graphs showing the light distribution characteristics of the lighting device 10 when the angle of the apex angle of the light distribution member 11 is changed, and the apex angles are 20 degrees, 30 degrees, 40 degrees, 50 degrees, The cases of 60 degrees, 70 degrees, 80 degrees, and 90 degrees are shown. As shown in FIG. 1, the light distribution member 11 has two flat plate-like portions 11a that are light diffusion surfaces, and the apex angle of the V-shaped cross section is continuous at the ridge line portion 11b. Irradiated to the inner side of the V shape. By determining the apex angle, the orientation distribution can be adjusted as shown in FIGS. 7A to 7H. The orientation distribution can also be adjusted by appropriately selecting the material and thickness of the light distribution member 11.
　したがって、レンズによる配向分布の調整のように複雑な光学設計を必要とせず、頂角の角度を変更して押出し成型で配光部材１１を形成するだけで容易に所望の配向分布を実現することができる。 Therefore, a complicated optical design like adjustment of the orientation distribution by the lens is not required, and a desired orientation distribution can be easily realized only by changing the apex angle and forming the light distribution member 11 by extrusion molding. Can do.
　このように本発明の照明装置は、簡便な構成で組立も容易であり、配光特性の指向性を低減させて側方や後方に対しても光を照射することができ、点灯位置を粒として視認しにくくでき眩しさやグレアを抑制できる。 As described above, the lighting device of the present invention is easy to assemble with a simple configuration, can reduce the directivity of the light distribution characteristics, and can irradiate light to the side and the rear, and the lighting position can be adjusted to the grain size. It is difficult to visually recognize and can suppress glare and glare.
　（第２実施形態）
　次に、本発明の第２実施形態について図面を参照して詳細に説明する。第１実施形態と共通の部分は説明を省略する。図８は、本発明の第２実施形態の照明装置２０を示す模式断面図である。照明装置２０は、配光部材２１と、複数のＬＥＤ２２と、配列基板２３と、ベース基板２４とを備えている。 (Second Embodiment)
Next, a second embodiment of the present invention will be described in detail with reference to the drawings. Descriptions of parts common to the first embodiment are omitted. FIG. 8 is a schematic cross-sectional view showing the lighting device 20 according to the second embodiment of the present invention. The lighting device 20 includes a light distribution member 21, a plurality of LEDs 22, an array substrate 23, and a base substrate 24.
　配光部材２１は、ＬＥＤ２２からの光を拡散するための部材であり、光拡散面である２つの平板状部分２１ａが稜線部２１ｂで接続されて断面Ｖ字形状の長尺形状をなしている。平板状部分２１ａおよび稜線部２１ｂは、同一材料で一体に形成され稜線部２１ｂで頂角を形成している。 The light distribution member 21 is a member for diffusing the light from the LED 22, and two flat plate-like portions 21 a that are light diffusion surfaces are connected by a ridge line portion 21 b to form a long shape with a V-shaped cross section. . The flat plate portion 21a and the ridge line portion 21b are integrally formed of the same material, and the apex angle is formed by the ridge line portion 21b.
　複数のＬＥＤ２２が配列基板２３上に搭載されており、配列基板２３はベース基板２４上に搭載されている。また、ベース基板２４は照明装置２０の底面をなしており、配光部材２１もベース基板２４上に接着剤等の固定部材によって取り付けられている。これにより、第２実施形態の照明装置２０では、ベース基板２４と断面Ｖ字形状の配光部材２１とで内部が空洞の断面三角形状の筒状となっている。 A plurality of LEDs 22 are mounted on the array substrate 23, and the array substrate 23 is mounted on the base substrate 24. The base substrate 24 forms the bottom surface of the lighting device 20, and the light distribution member 21 is also attached to the base substrate 24 by a fixing member such as an adhesive. Thereby, in the illuminating device 20 of 2nd Embodiment, the inside of the base board 24 and the light distribution member 21 of a cross-sectional V shape becomes a cylindrical shape of the cross-sectional triangle shape with a hollow inside.
　照明装置２０では、ベース基板２４が底面として外部に露出されているから、ＬＥＤ１２の発光に伴い発生する熱をベース基板２４の裏面から外部に放熱しやすくなる。ＬＥＤ１２は温度変化によって発光効率や発光波長が変化するという特性があるため、ベース基板２４を裏面から露出させて放熱することで、ＬＥＤ１２が高温になることを防止して照明装置２０を安定して動作させやすくなる。必要に応じてベース基板２４の裏面に放熱フィン等の部材を取り付けると、さらに放熱性を向上させることができる。 In the lighting device 20, since the base substrate 24 is exposed to the outside as a bottom surface, it is easy to dissipate heat generated by light emission of the LED 12 from the back surface of the base substrate 24 to the outside. Since the LED 12 has a characteristic that the light emission efficiency and the light emission wavelength change depending on the temperature change, by exposing the base substrate 24 from the back surface and dissipating heat, the LED 12 is prevented from becoming high temperature and the lighting device 20 is stabilized. It becomes easy to operate. If a member such as a heat radiating fin is attached to the back surface of the base substrate 24 as necessary, the heat dissipation can be further improved.
　図９は、照明装置２０の組み立てを示す模式断面図である。本実施の形態でも、押し出し成型などの手法を用いて容易に断面Ｖ字形状の長尺な配光部材２１を形成することができる。予め光を拡散する樹脂材料で配光部材２１を形成しておき、ＬＥＤ２２および配列基板２３を搭載したベース基板２４に配光部材２１を取り付ける。ベース基板２４の幅を配光部材２１の開口幅と略一致させ、ベース基板２４の長さを配光部材２１の長さと同程度とすることが好ましい。 FIG. 9 is a schematic cross-sectional view showing the assembly of the lighting device 20. Also in the present embodiment, the long light distribution member 21 having a V-shaped cross section can be easily formed using a technique such as extrusion molding. The light distribution member 21 is previously formed of a resin material that diffuses light, and the light distribution member 21 is attached to the base substrate 24 on which the LEDs 22 and the array substrate 23 are mounted. It is preferable that the width of the base substrate 24 is substantially equal to the opening width of the light distribution member 21, and the length of the base substrate 24 is approximately the same as the length of the light distribution member 21.
　配光部材２１の縁部とベース基板２４の縁部とを位置合わせして接合することで、断面三角形状の筒状となる。配光部材２１とベース基板２４の縁部を位置合わせするだけで、容易にＬＥＤ２２と配光部材２１との位置決めをすることができる。このとき、配光部材２１とベース基板２４の長尺方向の全体にわたって接着剤を塗布し、配光部材２１の両端部を封止部材等で封止する。これにより、照明装置２０の内部に水分が進入することを防止でき、防湿性および防滴性を向上できる。 By aligning and joining the edge of the light distribution member 21 and the edge of the base substrate 24, a cylindrical shape with a triangular cross section is obtained. The LED 22 and the light distribution member 21 can be easily positioned simply by aligning the edges of the light distribution member 21 and the base substrate 24. At this time, an adhesive is applied over the entire length of the light distribution member 21 and the base substrate 24, and both ends of the light distribution member 21 are sealed with a sealing member or the like. Thereby, it can prevent that a water | moisture content penetrates into the inside of the illuminating device 20, and can improve moisture resistance and drip-proof property.
　本実施の形態でも、配光部材２１は光拡散面である２つの平板状部分２１ａが稜線部２１ｂで連続して断面Ｖ字形状の頂角となっており、ＬＥＤ２２からの光は断面Ｖ字形状の内角側に対して照射される。この頂角の角度を決定することで、図７Ａ乃至図７Ｈのように配向分布を調整することができる。また、配光部材２１の材料や厚さを適宜選択することでも配向分布を調整することができる。したがって、レンズによる配向分布の調整のように複雑な光学設計を必要とせず、頂角の角度を変更して押出し成型で配光部材２１を形成するだけで容易に所望の配向分布を実現することができる。 Also in the present embodiment, the light distribution member 21 has two flat plate-like portions 21a, which are light diffusion surfaces, continuously formed by a ridge line portion 21b to have a V-shaped apex angle, and light from the LED 22 has a V-shaped cross section. Irradiated to the inner corner of the shape. By determining the apex angle, the orientation distribution can be adjusted as shown in FIGS. 7A to 7H. In addition, the orientation distribution can be adjusted by appropriately selecting the material and thickness of the light distribution member 21. Therefore, a complicated optical design as in the case of adjusting the orientation distribution by the lens is not required, and the desired orientation distribution can be easily realized only by changing the apex angle and forming the light distribution member 21 by extrusion molding. Can do.
　このように本発明の照明装置は、簡便な構成で組立も容易であり、配光特性の指向性を低減させて側方や後方に対しても光を照射することができ、点灯位置を粒として視認しにくくでき眩しさやグレアを抑制できる。 As described above, the lighting device of the present invention is easy to assemble with a simple configuration, can reduce the directivity of the light distribution characteristics, and can irradiate light to the side and the rear, and the lighting position can be adjusted to the grain size. It is difficult to visually recognize and can suppress glare and glare.
　（第３実施形態）
　次に、本発明の第３実施形態について図面を参照して詳細に説明する。第１実施形態と共通の部分は説明を省略する。図１０は、本発明の第３実施形態の照明装置３０を示す模式断面図である。照明装置３０は、配光部材３１と、複数のＬＥＤ３２と、配列基板３３と、ベース基板３４とを備えている。 (Third embodiment)
Next, a third embodiment of the present invention will be described in detail with reference to the drawings. Descriptions of parts common to the first embodiment are omitted. FIG. 10 is a schematic cross-sectional view showing the illumination device 30 according to the third embodiment of the present invention. The illumination device 30 includes a light distribution member 31, a plurality of LEDs 32, an array substrate 33, and a base substrate 34.
　配光部材３１は、ＬＥＤ３２からの光を拡散するための部材であり、光拡散面である平板状部分３１ａと平板状部分３１ｄが稜線部３１ｂで接続されて断面台形状の筒状をなしている。平板状部分３１ａ、３１ｄおよび稜線部３１ｂは同一材料で一体に形成され、平板状部分３１ｄが幅の狭い底面を形成し、内部に空洞３１ｃが形成されている。空洞３１ｃの内部には、複数のＬＥＤ３２が配列基板３３上に搭載され、配列基板３３はベース基板３４上に搭載され、ベース基板３４は配光部材３１の幅が広い底面に搭載されている。 The light distribution member 31 is a member for diffusing the light from the LED 32. The flat plate portion 31a and the flat plate portion 31d, which are light diffusion surfaces, are connected by a ridge line portion 31b to form a trapezoidal cylindrical shape. Yes. The flat plate portions 31a and 31d and the ridge line portion 31b are integrally formed of the same material, the flat plate portion 31d forms a narrow bottom surface, and a cavity 31c is formed inside. Inside the cavity 31 c, a plurality of LEDs 32 are mounted on the array substrate 33, the array substrate 33 is mounted on the base substrate 34, and the base substrate 34 is mounted on the bottom surface where the light distribution member 31 is wide.
　ＬＥＤ３２からの光は、配光部材３１の内面に向かって照射され、配光部材３１の内面に到達し配光部材３１の内部を伝搬して散乱および分散の作用を受けて様々な方向に進行する配光３６となり外部に照射される。このとき、光拡散面である平板状部分３１ａおよび平板状部分３１ｄに入射した光は、面に対して垂直方向が中心となるような配光となる。 Light from the LED 32 is irradiated toward the inner surface of the light distribution member 31, reaches the inner surface of the light distribution member 31, propagates through the light distribution member 31, travels in various directions under the action of scattering and dispersion. The light distribution 36 is applied to the outside. At this time, the light that has entered the flat plate portion 31a and the flat plate portion 31d, which are light diffusion surfaces, has a light distribution centered in the direction perpendicular to the surface.
　本実施の形態では、配光部材３１が断面台形状の筒状であるため、ＬＥＤ３２から前方に照射された光は平板状部分３１ｄに到達して散乱される。したがって、ＬＥＤ３２からの光は、底面に対して傾斜した平板状部分３１ａによる散乱の作用に加えて、頂面である平板状部分３１ｄによる散乱の作用を受ける。これにより、頂面である平板状部分３１ｄの幅などを選択することで、照明装置３０の前方への光量を変更することができ、第１実施形態よりも前方への光量を増加させることができる。 In the present embodiment, since the light distribution member 31 has a trapezoidal cross section, the light irradiated forward from the LED 32 reaches the flat plate portion 31d and is scattered. Therefore, the light from the LED 32 is subjected to the scattering action by the flat plate portion 31d which is the top surface in addition to the scattering action by the flat plate portion 31a inclined with respect to the bottom surface. Thereby, the light quantity ahead of the illuminating device 30 can be changed by selecting the width | variety etc. of the flat part 31d which is a top surface, and it can increase the light quantity ahead ahead of 1st Embodiment. it can.
　本実施の形態でも、配光部材３１は光拡散面である平板状部分３１ａ、３１ｄが稜線部３１ｂで連続しており、ＬＥＤ３２からの光は頂面の内角側に対して照射される。この頂面と平板状部分３１ａの角度（頂角）を決定することで、図７Ａ乃至図７Ｈのように配向分布を調整することができる。また、配光部材３１の材料や厚さを適宜選択することでも配向分布を調整することができる。したがって、レンズによる配向分布の調整のように複雑な光学設計を必要とせず、頂角の角度および頂面の幅を変更して押出し成型で配光部材３１を形成するだけで容易に所望の配向分布を実現することができる。 Also in the present embodiment, the light distribution member 31 has the plate- like portions 31a and 31d which are light diffusion surfaces continuous at the ridge line portion 31b, and the light from the LED 32 is irradiated to the inner angle side of the top surface. By determining the angle (vertical angle) between the top surface and the flat portion 31a, the orientation distribution can be adjusted as shown in FIGS. 7A to 7H. The orientation distribution can also be adjusted by appropriately selecting the material and thickness of the light distribution member 31. Therefore, a complicated optical design like adjustment of the orientation distribution by the lens is not required, and the desired orientation can be easily achieved by changing the apex angle and the top surface width and forming the light distribution member 31 by extrusion molding. Distribution can be realized.
　このように本発明の照明装置は、簡便な構成で組立も容易であり、配光特性の指向性を低減させて側方や後方に対しても光を照射することができ、点灯位置を粒として視認しにくくでき眩しさやグレアを抑制できる。 As described above, the lighting device of the present invention is easy to assemble with a simple configuration, can reduce the directivity of the light distribution characteristics, and can irradiate light to the side and the rear, and the lighting position can be adjusted to the grain size. It is difficult to visually recognize and can suppress glare and glare.
　（第４実施形態）
　次に、本発明の第４実施形態について図面を参照して詳細に説明する。第１実施形態と共通の部分は説明を省略する。図１１は、本発明の第４実施形態の照明装置４０を示す模式断面図である。照明装置４０は、配光部材４１と、複数のＬＥＤ４２と、配列基板４３と、ベース基板４４と、遮蔽部材４７を備えている。 (Fourth embodiment)
Next, a fourth embodiment of the present invention will be described in detail with reference to the drawings. Descriptions of parts common to the first embodiment are omitted. FIG. 11 is a schematic cross-sectional view showing a lighting device 40 according to a fourth embodiment of the present invention. The illumination device 40 includes a light distribution member 41, a plurality of LEDs 42, an array substrate 43, a base substrate 44, and a shielding member 47.
　配光部材４１は、ＬＥＤ４２からの光を拡散するための部材であり、光拡散面である平板状部分４１ａと平板状部分４１ｄが稜線部４１ｂで接続されて断面台形状の筒状をなしている。平板状部分４１ａ、４１ｄおよび稜線部４１ｂは同一材料で一体に形成され、平板状部分４１ｄが幅の狭い底面を形成し、内部に空洞４１ｃが形成されている。空洞４１ｃの内部には、複数のＬＥＤ４２が配列基板４３上に搭載され、配列基板４３はベース基板４４上に搭載され、ベース基板４４は配光部材４１の幅が広い底面に搭載されている。また、平板状部分４１ｄの内側に沿って、遮蔽部材４７が取り付けられている。 The light distribution member 41 is a member for diffusing light from the LED 42, and the flat plate portion 41a and the flat plate portion 41d, which are light diffusion surfaces, are connected by a ridge line portion 41b to form a cylindrical shape with a trapezoidal cross section. Yes. The flat plate portions 41a and 41d and the ridge line portion 41b are integrally formed of the same material, the flat plate portion 41d forms a narrow bottom surface, and a cavity 41c is formed inside. Inside the cavity 41 c, a plurality of LEDs 42 are mounted on the array substrate 43, the array substrate 43 is mounted on the base substrate 44, and the base substrate 44 is mounted on the bottom surface where the light distribution member 41 is wide. A shielding member 47 is attached along the inner side of the flat plate portion 41d.
　遮蔽部材４７は、ＬＥＤ４２からの光を遮るための部材であり、光を透過しない材料で形成されている。遮蔽部材４７として、金属などの光を反射する材料を用いると、平板状部分４１ｄ方向に進行してきた光を平板状部分４１ａ方向に反射でき、光を有効利用できることから好ましい。 The shielding member 47 is a member for shielding light from the LED 42, and is formed of a material that does not transmit light. It is preferable to use a material that reflects light, such as metal, as the shielding member 47 because light traveling in the direction of the flat plate portion 41d can be reflected in the direction of the flat plate portion 41a and light can be used effectively.
　ＬＥＤ４２からの光は、配光部材４１の内面に向かって照射され、配光部材４１の内面に到達した光が配光部材４１の内部を伝搬して散乱および分散の作用を受けて様々な方向に進行する配光４６となり外部に照射される。このとき、光拡散面である平板状部分４１ａに入射した光は、面に対して垂直方向が中心となるような配光となる。 The light from the LED 42 is irradiated toward the inner surface of the light distribution member 41, and the light that has reached the inner surface of the light distribution member 41 propagates through the light distribution member 41 and is subjected to the effects of scattering and dispersion in various directions. The light distribution 46 proceeds to the outside and is irradiated to the outside. At this time, the light incident on the flat plate portion 41a, which is a light diffusion surface, has a light distribution centered in the direction perpendicular to the surface.
　平板状部分４１ｄ方向に進行した光は、遮蔽部材４７に到達して遮蔽または反射されるため、頂面である平板状部分４１ｄには入射しない。したがって、ＬＥＤ４２からの光は、底面に対して傾斜した平板状部分４１ａによる散乱の作用を受け、頂面である平板状部分４１ｄでは散乱されない。これにより、頂面である平板状部分４１ｄの幅などを選択することで、照明装置４０の前方への光量を変更することができ、第１実施形態よりも前方への光量を減少させることができる。 Since the light traveling in the direction of the flat plate portion 41d reaches the shielding member 47 and is shielded or reflected, it does not enter the flat plate portion 41d that is the top surface. Therefore, the light from the LED 42 is scattered by the flat plate portion 41a inclined with respect to the bottom surface, and is not scattered by the flat plate portion 41d that is the top surface. Thereby, the light quantity ahead of the illuminating device 40 can be changed by selecting the width | variety etc. of the flat part 41d which is a top surface, and the light quantity ahead can be reduced rather than 1st Embodiment. it can.
　本実施の形態でも、配光部材４１は光拡散面である平板状部分４１ａ、４１ｄが稜線部４１ｂで連続しており、ＬＥＤ４２からの光は頂面の内角側に対して照射される。この頂面と平板状部分４１ａの角度（頂角）を決定することで、図７Ａ乃至図７Ｈのように配向分布を調整することができる。また、配光部材４１の材料や厚さを適宜選択することでも配向分布を調整することができる。したがって、レンズによる配向分布の調整のように複雑な光学設計を必要とせず、頂角の角度および頂面の幅を変更して押出し成型で配光部材４１を形成し、遮蔽部材４７を選択するだけで容易に所望の配向分布を実現することができる。 Also in this embodiment, the light distribution member 41 has flat portions 41a and 41d which are light diffusing surfaces continuous at the ridge line portion 41b, and the light from the LED 42 is irradiated to the inner angle side of the top surface. By determining the angle (vertical angle) between the top surface and the flat portion 41a, the orientation distribution can be adjusted as shown in FIGS. 7A to 7H. In addition, the orientation distribution can be adjusted by appropriately selecting the material and thickness of the light distribution member 41. Therefore, a complicated optical design like adjustment of the orientation distribution by the lens is not required, and the light distribution member 41 is formed by extrusion by changing the angle of the apex angle and the width of the apex surface, and the shielding member 47 is selected. A desired orientation distribution can be easily realized only by this.
　このように本発明の照明装置は、簡便な構成で組立も容易であり、配光特性の指向性を低減させて側方や後方に対しても光を照射することができ、点灯位置を粒として視認しにくくでき眩しさやグレアを抑制できる。 As described above, the lighting device of the present invention is easy to assemble with a simple configuration, can reduce the directivity of the light distribution characteristics, and can irradiate light to the side and the rear, and the lighting position can be adjusted to the grain size. It is difficult to visually recognize and can suppress glare and glare.
　（第５実施形態）
　次に、本発明の第５実施形態について図面を参照して詳細に説明する。第１実施形態および第２実施形態と共通の部分は説明を省略する。図２０は、本発明の第５実施形態の照明装置５０を示す模式断面図である。照明装置５０は、配光部材５１と、複数のＬＥＤ５２と、配列基板５３と、ベース基板５４とを備えている。 (Fifth embodiment)
Next, a fifth embodiment of the present invention will be described in detail with reference to the drawings. Descriptions of parts common to the first and second embodiments are omitted. FIG. 20 is a schematic cross-sectional view showing a lighting device 50 according to a fifth embodiment of the present invention. The lighting device 50 includes a light distribution member 51, a plurality of LEDs 52, an array substrate 53, and a base substrate 54.
　配光部材５１は、ＬＥＤ５２からの光を拡散するための部材であり、図２０（ａ）に示す構成では、光拡散面である３つの平板状部分５１ａが接続部５１ｂで接続されて断面三角形状の筒状をなしている。平板状部分５１ａは、同一材料で形成されてはいるが、一体的に形成されたものではない。すなわち、配光部材５１は、個別の平板状部材である平板状部分５１ａを接続部５１ｂで接続することにより、内部に空洞５１ｃが形成された筒状とされている。接続部５１ｂには、接着剤やパテ等の材料を用いても良い。あるいは、平板状部分５１ａの端部同士を融着させて接続部５１ｂを形成しても良い。空洞５１ｃの内部には、複数のＬＥＤ５２と、配列基板５３と、ベース基板５４が配置されている。 The light distribution member 51 is a member for diffusing the light from the LED 52. In the configuration shown in FIG. 20A, the three flat plate-like portions 51a that are light diffusion surfaces are connected by the connecting portion 51b and are triangular in cross section. It has a cylindrical shape. The flat plate-like portion 51a is formed of the same material, but is not integrally formed. That is, the light distribution member 51 has a cylindrical shape in which a cavity 51c is formed by connecting flat plate portions 51a, which are individual flat plate members, with the connecting portions 51b. You may use materials, such as an adhesive agent and putty, for the connection part 51b. Alternatively, the connecting portion 51b may be formed by fusing the end portions of the flat plate portion 51a. A plurality of LEDs 52, an array substrate 53, and a base substrate 54 are arranged inside the cavity 51c.
　配光部材５１は、図２０（ｂ）に示すように、光拡散面である２つの平板状部分５１ａを接続部５１ｂで接続し断面Ｖ字形状の長尺形状をなすように構成してもよい。この構成では、ベース基板５４が照明装置５０の底面をなしており、配光部材５１もベース基板５４上に接着剤等の固定部材によって取り付けられている。これにより、図２０（ｂ）に示す照明装置５０では、ベース基板５４と断面Ｖ字形状の配光部材５１とで内部が空洞の断面三角形状の筒状となっている。 As shown in FIG. 20 (b), the light distribution member 51 may be configured to have a long V-shaped cross section by connecting two flat portions 51a, which are light diffusing surfaces, with connecting portions 51b. Good. In this configuration, the base substrate 54 forms the bottom surface of the lighting device 50, and the light distribution member 51 is also attached to the base substrate 54 by a fixing member such as an adhesive. Accordingly, in the lighting device 50 shown in FIG. 20B, the base substrate 54 and the light distribution member 51 having a V-shaped cross section are formed in a cylindrical shape having a hollow cross-section inside.
　このように本発明の照明装置は、簡便な構成で組立も容易であり、配光特性の指向性を低減させて側方や後方に対しても光を照射することができ、点灯位置を粒として視認しにくくでき眩しさやグレアを抑制できる。 As described above, the lighting device of the present invention is easy to assemble with a simple configuration, can reduce the directivity of the light distribution characteristics, and can irradiate light to the side and the rear, and the lighting position can be adjusted to the grain size. It is difficult to visually recognize and can suppress glare and glare.
　（第６実施形態）
　次に、本発明の第６実施形態について図面を参照して詳細に説明する。第２実施形態と共通の部分は説明を省略する。図２１は、本発明の第６実施形態の照明装置６０を示す模式断面図である。照明装置６０は、配光部材６１と、複数のＬＥＤ６２と、配列基板６３と、ベース基板６４とを備えている。 (Sixth embodiment)
Next, a sixth embodiment of the present invention will be described in detail with reference to the drawings. Descriptions of parts common to the second embodiment are omitted. FIG. 21 is a schematic cross-sectional view showing a lighting device 60 according to a sixth embodiment of the present invention. The illumination device 60 includes a light distribution member 61, a plurality of LEDs 62, an array substrate 63, and a base substrate 64.
　配光部材６１は、ＬＥＤ６２からの光を拡散するための部材であり、光拡散面である平板状部分６１ａおよび６１ｄが稜線部６１ｂで接続されて断面Ｖ字形状の長尺形状をなしている。平板状部分６１ａ、６１ｄおよび稜線部６１ｂは、同一材料で一体に形成され稜線部６１ｂで頂角を形成している。 The light distribution member 61 is a member for diffusing the light from the LED 62, and the plate- like portions 61a and 61d, which are light diffusion surfaces, are connected by a ridge line portion 61b to form a long shape with a V-shaped cross section. . The flat plate- like parts 61a and 61d and the ridge line part 61b are integrally formed of the same material, and the apex angle is formed by the ridge line part 61b.
　複数のＬＥＤ６２が配列基板６３上に搭載されており、配列基板６３はベース基板６４上に搭載されている。また、ベース基板６４は照明装置６０の底面をなしており、配光部材６１もベース基板６４上に接着剤等の固定部材によって取り付けられている。 A plurality of LEDs 62 are mounted on the array substrate 63, and the array substrate 63 is mounted on the base substrate 64. The base substrate 64 forms the bottom surface of the lighting device 60, and the light distribution member 61 is also attached to the base substrate 64 by a fixing member such as an adhesive.
　例えば、第１実施形態における照明装置１０の断面では、配光部材１１は、ベース基板１４の中央を通り、かつ、ベース基板１４に垂直な直線に対して対称となっている。これに対し、第６実施形態における照明装置６０の断面では、配光部材６１における平板状部分６１ａおよび６１ｄの幅寸法が異なっており、ベース基板６４の中央を通り、かつ、ベース基板６４に垂直な直線に対して非対称形状となっている。 For example, in the cross section of the illumination device 10 in the first embodiment, the light distribution member 11 is symmetrical with respect to a straight line that passes through the center of the base substrate 14 and is perpendicular to the base substrate 14. On the other hand, in the cross section of the illuminating device 60 in the sixth embodiment, the width dimensions of the plate- like portions 61 a and 61 d in the light distribution member 61 are different and pass through the center of the base substrate 64 and perpendicular to the base substrate 64. Asymmetrical with respect to a straight line.
　図２２は、照明装置６０全体での断面方向での配光特性を示すグラフである。照明装置６０全体の配光特性は、図２２に示したように頂角方向での光量が減少し、斜め前方の光量が多く、側方にも十分に光量があり、後方にもある程度の光量が照射される分布となっている。さらに、配光部材６１の断面形状が非対称であることにより、側方への光量も左右非対称となっている。照明装置６０では、平板状部分６１ａおよび６１ｄの幅寸法比を決定することで配向分布を調整することができる。 FIG. 22 is a graph showing the light distribution characteristics in the cross-sectional direction of the entire illumination device 60. As shown in FIG. 22, the light distribution characteristic of the entire illumination device 60 is such that the amount of light in the apex direction decreases, the amount of light in the oblique front is large, the amount of light is sufficiently in the side, and the amount of light in the back is also some. Is distributed. Furthermore, since the cross-sectional shape of the light distribution member 61 is asymmetric, the amount of light to the side is also asymmetrical. In the illumination device 60, the orientation distribution can be adjusted by determining the width dimension ratio of the flat plate- like portions 61a and 61d.
　照明装置６０は、例えば、ショーケースなどにおいてケース内の商品（食品等）とケース上部に配置される看板部とを同時に照射する用途などにおいて有効である。 The lighting device 60 is effective in, for example, a use of irradiating a product (food, etc.) in a case and a signboard disposed at the top of the case at the same time in a showcase or the like.
　図２３（ａ）は、上部に看板部７０を有し、かつ内部に商品８０を陳列したショーケースにおいて、第１実施形態における照明装置１０を用いて、看板部７０と商品８０とを同時に照射する場合を示す図である。照明装置１０は、ショーケース内部の上方に配置される。このように、照明装置１０を用いた場合、配光分布が左右対象であるため、看板部７０に対しては照明が多く、商品８０に対しては照明が少ないという事態が生じうる。 FIG. 23A shows a display case having a signboard portion 70 at the top and displaying the product 80 therein, and simultaneously illuminating the signboard portion 70 and the product 80 using the lighting device 10 according to the first embodiment. It is a figure which shows the case where it does. The lighting device 10 is disposed above the inside of the showcase. As described above, when the lighting device 10 is used, the distribution of light distribution is a right and left target, so that there may be a situation in which the signboard unit 70 has a lot of illumination and the product 80 has little illumination.
　これに対し、図２３（ｂ）は、同一のショーケースにおいて、第６実施形態における照明装置６０を用いた場合を示す図である。このように、照明装置６０を用いた場合、配光分布が左右非対象となるように調整可能であるため、看板部７０に対する照明を少なく、商品８０に対する照明を多くするように調整することで、看板部７０および商品８０の両方をバランスよく照らすことができる。 On the other hand, FIG.23 (b) is a figure which shows the case where the illuminating device 60 in 6th Embodiment is used in the same showcase. As described above, when the lighting device 60 is used, the light distribution can be adjusted so as to be left and right non-target. Therefore, the lighting for the signboard unit 70 is reduced and the lighting for the product 80 is increased. Both the sign part 70 and the product 80 can be illuminated with good balance.
　今回開示された実施の形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上記した説明ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
１０、２０、３０、４０、５０、６０…照明装置
１１、２１、３１、４１、５１、６１…配光部材
１１ａ、２１ａ、３１ａ、３１ｄ、４１ａ、４１ｄ、５１ａ、６１ａ、６１ｄ…平板状部分
１１ｂ、２１ｂ、３１ｂ、４１ｂ、６１ｂ…稜線部
５１ｂ…接続部
１１ｃ、３１ｃ、４１ｃ、５１ｃ…空洞
１２、２２、３２、４２、５２、６２…ＬＥＤ
１３、２３、３３、４３、５３、６３…配列基板
１４、２４、３４、４４、５４、６４…ベース基板
１６、３６、４６…配光
１７…保持具
１８…カバー
１８ａ…前面中央領域
１８ｂ…前面端部領域
１８ｃ…側面領域
１８ｄ…背面領域
１９…照射光
４７…遮蔽部材 10, 20, 30, 40, 50, 60 ... Illumination device 11, 21, 31, 41, 51, 61 ... Light distribution member 11a, 21a, 31a, 31d, 41a, 41d, 51a, 61a, 61d ... Flat plate portion 11b, 21b, 31b, 41b, 61b ... ridge line portion 51b ... connection portion 11c, 31c, 41c, 51c ... cavity 12, 22, 32, 42, 52, 62 ... LED
13, 23, 33, 43, 53, 63 ... array substrates 14, 24, 34, 44, 54, 64 ... base substrates 16, 36, 46 ... light distribution 17 ... holder 18 ... cover 18a ... front center region 18b ... Front end region 18c ... side region 18d ... back region 19 ... irradiation light 47 ... shielding member

Claims (5)

  1. 　複数の発光ダイオード素子が直列状に配列され、
    　前記発光ダイオード素子からの光を拡散する平板状の光拡散面を少なくとも２つ有する配光部材を備え、
    　前記配光部材は、長尺方向が前記複数の発光ダイオード素子の配列方向に延び、かつ略平行に配されていることを特徴とする照明装置。     A plurality of light emitting diode elements are arranged in series,
    A light distribution member having at least two flat light diffusion surfaces for diffusing light from the light emitting diode elements;
    The illumination device according to claim 1, wherein the light distribution member has a longitudinal direction extending in an arrangement direction of the plurality of light emitting diode elements and is arranged substantially in parallel.
  2. 　請求項１に記載の照明装置であって、
    　前記配光部材は、前記光拡散面が稜線部を介して連なる断面Ｖ字形状の部分を有し、
    　前記複数の発光ダイオード素子の配列から出射した光が前記断面Ｖ字形状の内角側に対して入射されるように、前記配光部材が配置されていることを特徴とする照明装置。     The lighting device according to claim 1,
    The light distribution member has a V-shaped section in which the light diffusion surface continues through a ridge line portion,
    The illuminating device, wherein the light distribution member is arranged so that light emitted from the array of the plurality of light emitting diode elements is incident on an inner angle side of the V-shaped cross section.
  3. 　請求項１に記載の照明装置であって、
    　前記配光部材は、前記光拡散面が３つの稜線部を介して連なる断面三角形状の筒状であり、
    　前記発光ダイオード素子は、配列基板上に配置され、前記配列基板はさらにベース基板上に載置されており、
    　前記ベース基板は、前記配列基板を載置した面と反対側の面が前記配光部材の内側面に接していることを特徴とする照明装置。     The lighting device according to claim 1,
    The light distribution member has a cylindrical shape with a triangular cross section in which the light diffusing surface continues through three ridge lines,
    The light emitting diode element is disposed on an array substrate, and the array substrate is further placed on a base substrate,
    The lighting device according to claim 1, wherein a surface of the base substrate opposite to a surface on which the array substrate is placed is in contact with an inner surface of the light distribution member.
  4. 　請求項１に記載の照明装置であって、
    　前記配光部材は、３つの平板状部分が稜線部を介して連なる断面台形状の部分を有し、
    　前記複数の発光ダイオード素子の配列から出射した光が前記断面台形状の内角側に対して入射されるように、前記配光部材が配置されていることを特徴とする照明装置。     The lighting device according to claim 1,
    The light distribution member has a trapezoidal section in which three flat portions are connected via a ridge line portion,
    The illuminating device, wherein the light distribution member is arranged so that light emitted from the array of the plurality of light emitting diode elements is incident on an inner angle side of the trapezoidal cross section.
  5. 　請求項１に記載の照明装置であって、
    　前記発光ダイオード素子は、配列基板上に配置され、前記配列基板はさらにベース基板上に載置されており、
    　前記配光部材の断面は、前記複数の光拡散面の幅が異なるものであり、前記ベース基板の中央を通り、かつ、ベース基板に垂直な直線に対して非対称形状となっていることを特徴とする照明装置。     The lighting device according to claim 1,
    The light emitting diode element is disposed on an array substrate, and the array substrate is further placed on a base substrate,
    The cross-section of the light distribution member has different widths of the plurality of light diffusion surfaces, has an asymmetric shape with respect to a straight line that passes through the center of the base substrate and is perpendicular to the base substrate. A lighting device.
PCT/JP2016/050144 2015-02-04 2016-01-05 Illumination device WO2016125511A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016573237A JP6404369B2 (en) 2015-02-04 2016-01-05 Lighting device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015020311 2015-02-04
JP2015-020311 2015-02-04

Publications (1)

Publication Number Publication Date
WO2016125511A1 true WO2016125511A1 (en) 2016-08-11

Family

ID=56563863

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/050144 WO2016125511A1 (en) 2015-02-04 2016-01-05 Illumination device

Country Status (2)

Country Link
JP (1) JP6404369B2 (en)
WO (1) WO2016125511A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018098171A (en) * 2016-12-09 2018-06-21 廈門普為光電科技有限公司Ｘｉａｍｅｎ ＰＶＴＥＣＨ Ｃｏ．， Ｌｔｄ． LED lamp
JP2018107041A (en) * 2016-12-27 2018-07-05 パナソニックＩｐマネジメント株式会社 Lighting device
JP2018174137A (en) * 2017-03-30 2018-11-08 エクセル株式会社 Lighting fixture
JP2018183445A (en) * 2017-04-26 2018-11-22 富士電機株式会社 Show case
WO2019142386A1 (en) * 2018-01-16 2019-07-25 シャープ株式会社 Lighting device, sign board, show case and security lighting
WO2019171636A1 (en) * 2018-03-08 2019-09-12 シャープ株式会社 Linear lighting device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100296281A1 (en) * 2007-10-15 2010-11-25 Osram Gesellschaft Mit Beschraenkter Haftung Led lamp with diffuser
JP2012138240A (en) * 2010-12-27 2012-07-19 Panasonic Corp Illumination source
JP2013033725A (en) * 2011-06-30 2013-02-14 Toshiba Corp Lighting device
JP2013058316A (en) * 2011-09-07 2013-03-28 Idec Corp Led lighting system
CN203202734U (en) * 2013-04-17 2013-09-18 苏州旭耀光电有限公司 Triangle lamp
JP2013251080A (en) * 2012-05-30 2013-12-12 Toshiba Corp Lighting device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100296281A1 (en) * 2007-10-15 2010-11-25 Osram Gesellschaft Mit Beschraenkter Haftung Led lamp with diffuser
JP2012138240A (en) * 2010-12-27 2012-07-19 Panasonic Corp Illumination source
JP2013033725A (en) * 2011-06-30 2013-02-14 Toshiba Corp Lighting device
JP2013058316A (en) * 2011-09-07 2013-03-28 Idec Corp Led lighting system
JP2013251080A (en) * 2012-05-30 2013-12-12 Toshiba Corp Lighting device
CN203202734U (en) * 2013-04-17 2013-09-18 苏州旭耀光电有限公司 Triangle lamp

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018098171A (en) * 2016-12-09 2018-06-21 廈門普為光電科技有限公司Ｘｉａｍｅｎ ＰＶＴＥＣＨ Ｃｏ．， Ｌｔｄ． LED lamp
JP2018107041A (en) * 2016-12-27 2018-07-05 パナソニックＩｐマネジメント株式会社 Lighting device
JP2018174137A (en) * 2017-03-30 2018-11-08 エクセル株式会社 Lighting fixture
JP2018183445A (en) * 2017-04-26 2018-11-22 富士電機株式会社 Show case
WO2019142386A1 (en) * 2018-01-16 2019-07-25 シャープ株式会社 Lighting device, sign board, show case and security lighting
CN111630314A (en) * 2018-01-16 2020-09-04 夏普株式会社 Lighting device, signboard, showcase and anti-theft lamp
JPWO2019142386A1 (en) * 2018-01-16 2021-01-14 シャープ株式会社 Lighting equipment, signboards, showcases and security lights
WO2019171636A1 (en) * 2018-03-08 2019-09-12 シャープ株式会社 Linear lighting device
JP2019160441A (en) * 2018-03-08 2019-09-19 シャープ株式会社 Linear lighting device

Also Published As

Publication number Publication date
JP6404369B2 (en) 2018-10-17
JPWO2016125511A1 (en) 2018-03-01

Similar Documents

Publication Publication Date Title
JP6404369B2 (en) Lighting device
JP6675021B2 (en) Lighting equipment
US8235547B2 (en) LED lamp with diffuser
TWI452548B (en) Led luminaire element for illumination of a light box with homogeneous light distribution
JP5601556B2 (en) Lighting device and lighting fixture
US20110096544A1 (en) Illumination device
US20110141724A1 (en) Led lighting device and system
US9546761B2 (en) LED lighting device which has stable structure and is easily assembled and disassembled
JP2015015494A (en) Light source module and surface light-emitting device
JP2006294618A (en) Light emitting panel
JP2006286639A (en) Light emitting device having a plurality of overlapping panels forming recess for emitting light
JP2009129809A (en) Lighting system
JP2013182730A (en) Lighting module, and lighting device having the same
TWI580902B (en) Light emitting diode light source module
JP6094618B2 (en) lamp
WO2012063758A1 (en) Lighting device and display device
JP2013157326A (en) Light source module and display device
JP4848534B2 (en) Planar light source
WO2011135885A1 (en) Led backlight and liquid crystal display device
CN106164577B (en) Optical lens and LED lamp module for backlight
JP2008234876A (en) Lighting device
KR20130095051A (en) Ligout source package and backlight unit including the same
JP2014229545A (en) Light source device, and lighting apparatus using the same
JP5535688B2 (en) Lighting device
CN107620886B (en) Lighting device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16746342

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2016573237

Country of ref document: JP

Kind code of ref document: A

122 Ep: pct application non-entry in european phase

Ref document number: 16746342

Country of ref document: EP

Kind code of ref document: A1