WO2013145054A1 - 照明用光源及び照明装置 - Google Patents
照明用光源及び照明装置 Download PDFInfo
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- WO2013145054A1 WO2013145054A1 PCT/JP2012/007978 JP2012007978W WO2013145054A1 WO 2013145054 A1 WO2013145054 A1 WO 2013145054A1 JP 2012007978 W JP2012007978 W JP 2012007978W WO 2013145054 A1 WO2013145054 A1 WO 2013145054A1
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- WIPO (PCT)
- Prior art keywords
- light
- light emitting
- light source
- illumination
- emitting module
- Prior art date
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- 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
-
- 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
- F21K9/20—Light sources comprising attachment means
- F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
-
- 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
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
-
- 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
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/61—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/08—Combinations of only two kinds of elements the elements being filters or photoluminescent elements and reflectors
-
- 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
- F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
- F21V3/049—Patterns or structured surfaces for diffusing light, e.g. frosted surfaces
-
- 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
- F21K9/20—Light sources comprising attachment means
- F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
- F21K9/238—Arrangement or mounting of circuit elements integrated in the light source
-
- 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
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
- F21V17/101—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening permanently, e.g. welding, gluing or riveting
-
- 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
- F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
- F21V23/004—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
- F21V23/006—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board the substrate being distinct from the light source holder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
- F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
- F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the present invention relates to an illumination light source including a light emitting element such as a light emitting diode (LED), and an illumination apparatus using the same.
- a light emitting element such as a light emitting diode (LED)
- LEDs are used in lamps and the like as highly efficient and space-saving light sources. Among them, LED lamps using LEDs are being researched and developed as alternative light sources for fluorescent lamps and incandescent lamps conventionally known.
- Patent Document 1 discloses a bulb-type LED lamp using an LED.
- FIG. 14 is a cross-sectional view of a conventional bulb-shaped LED lamp disclosed in Patent Document 1. As shown in FIG.
- the conventional light bulb-shaped LED lamp 1000 includes a hemispherical glove 1030, a base 1070 for power reception, and a metal casing (outer shell member) 1060.
- the housing 1060 has a peripheral portion 1061 exposed to the outside, a disk-like light source mounting portion 1062 integrally formed with the peripheral portion 1061, and a recess 1063 formed inside the peripheral portion 1061.
- a light emitting module 1010 having a plurality of LEDs is mounted on the top surface of the light source mounting portion 1062.
- An insulating member 1040 formed along the inner surface of the recess 1063 of the housing 1060 is provided, and a lighting circuit 1140 for lighting the LED is accommodated in the insulating member 1040. It is done.
- the light traveling toward the base among the emitted light of the light emitting module 1010 is blocked by the housing 1060, so there is a problem that the light distribution angle of the illumination light source is narrow.
- the LED since the LED has a Lambertian light distribution and a relatively narrow radiation angle (about 120 °), it is difficult to realize a wide light distribution angle in the LED lamp using the LED.
- This invention is made in view of the above subjects, and it aims at providing the light source for illumination which has a broad light distribution angle, and an illuminating device.
- one aspect of the illumination light source according to the present invention is an illumination light source that constitutes an envelope with a globe, a housing, and a base, and is disposed in the envelope.
- the light emitting module includes a light emitting module, and the globe has a bulging portion that bulges outward beyond the housing, and the light intensity within an angle range of -170 ° to + 170 ° with respect to the central axis of the illumination light source is And 1 ⁇ 2 or more of the central luminous intensity at the central axis of the illumination light source.
- a low luminous intensity angular range exists within the above-mentioned angular range of -170 ° or more and + 170 ° or less, and in the low luminous intensity angular range, the luminous intensity at one angle is It is characterized in that the absolute value is smaller than the luminous intensity at an angle larger than one angle.
- the low luminous intensity angular range is preferably ⁇ 60 ° to + 60 ° with respect to the central axis of the illumination light source.
- mode of the light source for illumination which concerns on this invention is a light source for illumination which comprises an envelope with a glove
- the globe has a bulging portion that bulges outward with respect to the housing, and in the light distribution curve diagram, for the illumination when the maximum value of the luminous intensity in the light distribution curve of the illumination light source is 1.
- S1 the area of the portion surrounded by the light distribution curve of the light source
- the area of the portion surrounded by the light distribution curve of the incandescent lamp is 1 when the maximum value of the light intensity in the light distribution curve of the incandescent lamp is 1. It is characterized in that S1> 0.9 ⁇ S2.
- an optical member disposed in the envelope is provided, and the optical member changes the traveling direction of the light emitted by the light emitting module. preferable.
- the optical member is configured to change the traveling direction of the light emitted by the light emitting module by refracting the light emitted by the light emitting module. It features.
- the optical member is configured to change the traveling direction of the light emitted by the light emitting module by reflecting the light emitted by the light emitting module. It features.
- the outer surface of the optical member is subjected to mirror surface processing.
- the optical member is disposed between the light emitting module and the globe.
- the optical member is disposed apart from the light emitting module.
- the area on the light emitting module side of the optical member is preferably larger than the area of the light emitting region of the light emitting module.
- the optical member is in contact with the light emitting module.
- the area on the light emitting module side of the optical member is preferably smaller than the area of the light emitting region of the light emitting module.
- the bulging portion is preferably subjected to a diffusion treatment for diffusing light.
- a base on which the light emitting module is mounted is provided, and the area of the light emitting area of the light emitting module is relative to the area of the glove opening inner area on the upper surface of the base. It is preferably at most 8%.
- the globe is made of glass or resin.
- the globe can be a polyhedron.
- the light emitting module includes a mounting substrate and a semiconductor light emitting device mounted on the mounting substrate, and the semiconductor light emitting device is mounted on the mounting substrate. It is characterized in that it is implemented.
- the light emitting module includes a mounting base and a semiconductor light emitting element mounted on the mounting base, and the semiconductor light emitting element is the mounting base Are implemented in at least two planes of
- the light emitting module and the optical member are disposed on a lamp axis.
- one aspect of a lighting device according to the present invention is characterized by including the above-described lighting light source.
- FIG. 1 is a partially cutaway perspective view of the illumination light source according to Embodiment 1 of the present invention.
- FIG. 2 is a cross-sectional view of the illumination light source according to Embodiment 1 of the present invention.
- FIG. 3 is a plan view for explaining the arrangement of the light emitting module and the optical member in the illumination light source according to the first embodiment of the present invention.
- FIG. 4 is a view for explaining how light emitted from the light emitting module propagates through the optical member in the illumination light source according to the first embodiment of the present invention.
- FIG. 5 is a view for explaining how light emitted from the light emitting module is taken out to the outside of the illumination light source in the illumination light source according to the first embodiment of the present invention.
- FIG. 1 is a partially cutaway perspective view of the illumination light source according to Embodiment 1 of the present invention.
- FIG. 2 is a cross-sectional view of the illumination light source according to Embodiment 1 of the present invention.
- FIG. 3 is
- FIG. 6 is a light distribution curve diagram of the illumination light source according to Embodiment 1 of the present invention.
- FIG. 7 is a view showing a light distribution of a light distribution curve in the illumination light source according to Embodiment 1 of the present invention.
- FIG. 8 is a partially cutaway perspective view of the illumination light source according to Embodiment 2 of the present invention.
- FIG. 9 is a cross-sectional view of an illumination light source according to Embodiment 2 of the present invention.
- FIG. 10 is an enlarged sectional view showing a portion surrounded by a two-dot chain line in FIG.
- FIG. 11 is a view showing an arrangement relationship between an optical member and a light emitting module in an illumination light source according to a first modification of the present invention.
- FIG. 12 is a view for explaining the diffusion processing applied to the globe in the illumination light source according to the second modification of the present invention.
- FIG. 13 is a partially cutaway perspective view of the illumination light source according to the third modification of the present invention.
- FIG. 14 is a cross-sectional view of a conventional bulb-shaped LED lamp disclosed in Patent Document 1. As shown in FIG.
- FIG. 1 is a partially cutaway perspective view of the illumination light source according to Embodiment 1 of the present invention.
- FIG. 2 is a cross-sectional view of the illumination light source according to Embodiment 1 of the present invention.
- the upper side of the drawing is the front of the illumination light source, and the lower side of the drawing is the rear of the illumination light source.
- “in front” means the center of the illumination light source, assuming that the middle point between the upper end of the illumination light source (the top of the globe) and the lower end of the illumination light source (the top of the base) is the illumination light source.
- the alternate long and short dash line drawn along the vertical direction of the drawing shows the lamp axis J (central axis) of the light source for illumination, and in the present embodiment, the lamp axis J and the globe axis coincide.
- the lamp axis J is an axis serving as a rotation center when attaching the illumination light source 1 to a socket of the illumination device (not shown), and coincides with the rotation axis of the base 70.
- the illumination light source 1 is a bulb-shaped LED lamp which is a substitute for a bulb-shaped fluorescent lamp or an incandescent lamp, and includes a light emitting module 10 as a light source;
- a housing 60 covering the circuit holder 50, a base 70 electrically connected to the circuit unit 40, and an optical member 80 for changing the traveling direction (direction) of light emitted by the light emitting module 10 are provided.
- an envelope is formed by the globe 30, the housing 60, and the base 70, and the light emitting module 10 and the optical member 80 are accommodated in the envelope.
- the combined lamp axial direction length of the housing 60 and the base 70 is configured to be longer than the lamp axial direction length of the globe 30.
- the glove 30 has a bulging portion 31 that bulges to the outside of the housing 60.
- the illumination light source 1 has a luminous intensity within a predetermined angular range of -170 ° to + 170 ° with respect to the lamp axis J of the illumination light source 1 as 1 for the central luminous intensity at the lamp axis J of the illumination light source 1. It is configured to be / 2 or more.
- the configuration is realized by the bulging portion 31 of the glove 30 and the optical member 80.
- the light emitting module 10 is, for example, an LED module that emits predetermined light, and is disposed inward of the globe 30. As shown in FIG. 2, the light emitting module 10 includes a mounting substrate 11, a semiconductor light emitting element 12 mounted on the mounting substrate 11, and a seal formed on the mounting substrate 11 so as to seal the semiconductor light emitting element 12. The body 13 is provided. In the present embodiment, the light emitting module 10 is disposed so that the lamp axis J and the mounting substrate 11 intersect.
- the mounting substrate 11 is, for example, a substantially square plate-like substrate in plan view, and is mounted on the base 20.
- a ceramic substrate made of alumina or the like can be used as the mounting substrate 11.
- a plurality of semiconductor light emitting elements 12 are mounted on one surface of the mounting substrate 11, and in the present embodiment, the plurality of semiconductor light emitting elements 12 are plane in a matrix so as to be point symmetrical about the lamp axis J It is arranged. In addition, each semiconductor light emitting element 12 is mounted in a posture in which each main light emission direction is directed to the front of the illumination light source.
- the semiconductor light emitting element 12 is, for example, an LED (LED chip). However, the semiconductor light emitting element 12 may be other than the LED, and for example, a semiconductor laser, an organic EL element or an inorganic EL element may be used.
- the number of semiconductor light emitting elements 12 is not limited to a plurality, and may be one. Further, the arrangement of the semiconductor light emitting elements 12 is not limited to a matrix, and may be arranged in an annular shape such as an annular shape. Furthermore, the attitude of the semiconductor light emitting element 12 does not have to be such that all the semiconductor light emitting elements 12 are directed in the direction along the lamp axis J, and a part is directed in a direction obliquely inclined to the lamp axis J It may be implemented in attitude. As a result, the controllability of the light distribution angle of the lamp is improved, so fine adjustment can be made to obtain more preferable light distribution characteristics.
- the light emitting module 10 is provided with a pair of electrodes (not shown) electrically connected to a pair of electric wires (leads) 40 a and 40 b derived from the power output portion of the circuit unit 40,
- the semiconductor light emitting element 12 emits light when DC power is supplied to the light emitting module 10 from the pair of electrodes.
- the sealing body 13 is a sealing member for sealing the semiconductor light emitting element 12, and in the present embodiment, all the semiconductor light emitting elements 12 are collectively sealed.
- the sealing body 13 is substantially square in plan view, and is orthogonal to the lamp axis J.
- the sealing body 13 and the lamp axis J do not necessarily need to be orthogonal to each other, in order to obtain uniform light distribution over the entire circumference around the lamp axis J, the lamp axis J is a sealing body. Crossing at the center of 13 is preferable, and orthogonal is more preferable.
- the sealing body 13 is mainly made of a translucent material, but if it is necessary to convert the wavelength of light emitted from the semiconductor light emitting element 12 into a predetermined wavelength, the wavelength for converting the wavelength of light A conversion material is incorporated into the translucent material.
- resin such as a silicone resin
- fluorescent substance particle can be utilized, for example.
- the sealing body 13 can be comprised as fluorescent substance containing resin.
- a blue light emitting LED that emits blue light is used as the semiconductor light emitting element 12, and as the sealing body 13, phosphor particles that wavelength-convert blue light to yellow light and the phosphor particles And the translucent resin material with which it mixes.
- a part of the blue light emitted from the semiconductor light emitting element 12 is wavelength-converted to yellow light by the sealing body 13, and white light generated by mixing the wavelength-converted yellow light and the blue light not converted.
- the light emitting module 10 may be, for example, a combination of a semiconductor light emitting element emitting ultraviolet light and phosphor particles of each color that emits light in three primary colors (red, green, and blue). Furthermore, as the wavelength conversion material, a material including a semiconductor, a metal complex, an organic dye, a pigment, or the like, which absorbs light of a certain wavelength and emits light of a wavelength different from the absorbed light may be used.
- the base 20 is a light source attaching member for mounting the light emitting module 10, and is, for example, a substantially disc-like substrate having a plane orthogonal to the lamp axis J.
- a recess for planarly arranging the light emitting module 10 is formed on one surface of the base 20.
- the light emitting module 10 disposed in the recess is fixed to the base 20 by, for example, fasteners, screws, adhesion, and the like.
- the base 20 is attached to a first opening which is an opening on one side (glove side) of the cylindrical case 60, and the side wall of the base 20 is above the first opening of the case 60. It is in contact with the inner surface. That is, the base 20 is fixed in a state of being fitted into the first opening side of the housing 60.
- the base 20 is provided with a pair of through holes 20a so as to connect the main surface on the glove side and the main surface on the housing side, and a pair of electrical wiring of the circuit unit 40 through the through holes 20a.
- 40a and 40b are led out to the light emitting module side of the base 20.
- Each of the pair of electrical wirings 40 a and 40 b is connected to the mounting substrate 11 of the light emitting module 10, and thereby the light emitting module 10 and the circuit unit 40 are electrically connected.
- the base 20 in the present embodiment is made of, for example, a metal material.
- a metal material for example, Al, Ag, Au, Ni, Rh, Pd, an alloy of two or more of them, an alloy of Cu and Ag, or the like can be considered.
- Such a metal material has good thermal conductivity, so that the heat generated by the light emitting module 10 can be efficiently conducted to the housing 60.
- the base 20 can be a substantially disc-shaped metal substrate molded by aluminum die casting.
- the base 20 can be functioned as a heat dissipation body for conducting the heat generated from the light emitting module 10 to the housing 60 by forming the base 20 with a metal material.
- the globe 30 is a hemispherical translucent cover for emitting the light emitted from the light emitting module 10 to the outside of the lamp, and in the present embodiment, the opening side (the base side) is narrowed. There is. Also, the light emitting module 10 is covered by the globe 30. Thereby, the light of the light emitting module 10 incident on the inner surface of the globe 30 is transmitted through the globe 30 and taken out of the globe 30.
- the globe 30 has a bulging portion 31 that bulges outward of the illumination light source 1 more than the surface of the housing 60.
- a virtual surface when the main outer surface (a tapered surface in the present embodiment) of the housing 60 is extended to the glove side is a virtual outer surface F of the housing 60 (FIG. 2).
- the bulging portion 31 is configured to be located outside (outside) the imaginary outer surface F. That is, the bulging portion 31 is formed such that the top of the bulging portion 31 exceeds the virtual outer surface F.
- the diameter of the bulging portion 31 (diameter in a plane passing through the bulging portion 31 and orthogonal to the lamp axis J) is the diameter of the glove side end of the housing 60 (opening diameter of the first opening of the housing 60) Is also getting bigger.
- the diameter of the bulging portion 31 is the maximum outer diameter of the glove 30, and the maximum outer diameter W1 of the glove is larger than the outer diameter W2 of the glove side end of the housing 60.
- the globe 30 has the bulging portion 31, the light emitted from the light emitting module 10 is prompted not only to the front and the side but also to the rear (the base side) and is extracted to the outside of the globe 30. That is, the bulging portion 31 makes it easy for the light emitted from the globe 30 to wrap around to the base. As a result, even if an LED with a narrow light emission angle is used, the light distribution angle of the lamp can be easily expanded.
- the bulging portion 31 is preferably formed in a region (bottom portion) near the opening of the glove 30. Further, in the present embodiment, the portion where the bulging portion 31 is formed in the glove 30 is not formed so that only the portion protrudes from a part of the outer surface of the glove 30, but the bulging portion is formed.
- the outer surface of the entire glove 30 including 31 is configured to be a smooth curved surface without unevenness.
- the glove 30 is disposed so that the opening side end thereof is sandwiched between the base 20 and the housing 60.
- the first end of the glove 30 is pressed into the first opening of the housing 60 to cover the light emitting module 10 and the optical member 80. It is attached to the opening.
- the globe 30 be subjected to a diffusion process for diffusing the light emitted from the light emitting module 10.
- a diffusion process for diffusing the light emitted from the light emitting module 10.
- the globe 30 can have a light diffusion function.
- the light diffusion film can be formed by applying a resin containing a light diffusion material such as silica or calcium carbonate, a white pigment, or the like on the entire inner surface or outer surface of the globe 30.
- the light diffusion function can be given to the globe 30 by forming the light diffusion dots on the globe 30.
- the globe 30 can have a light diffusing function by forming a plurality of dots or forming a minute dimple (dimple).
- the light diffusion function can also be provided by embossing the glove 30.
- the globe 30 with the light diffusing function, it is possible to diffuse the light entering the globe 30 from the light emitting module 10, so that the light distribution angle of the illumination light source can be widened.
- the bulging portion 31 of the globe 30 with a light diffusion function, the amount of light emitted from the bulging portion 31 can be further increased to the base side. Thereby, the light distribution angle of the illumination light source can be further expanded.
- the shape of the globe 30 is hemispherical, but is not limited to this.
- the shape of the globe 30 may be a spheroid or a spheroid.
- a glove having a shape conforming to the bulb of the A-type bulb which is a general bulb shape.
- resin materials such as a glass material or a polycarbonate, can be used.
- the circuit unit 40 is a lighting circuit (power supply circuit) that supplies power to the light emitting module 10 in order to light (emit) the semiconductor light emitting element 12, and the circuit board 41 and the electronic components mounted on the circuit board 41. 42 and 43. In FIG. 2, only some electronic components are denoted by reference numerals.
- the circuit unit 40 is accommodated in the circuit holder 50 and fixed to the circuit holder 50 by, for example, screwing, bonding or engagement.
- the circuit board 41 is disposed such that its main surface is parallel to the lamp axis J. In this way, the circuit unit 40 can be stored more compactly in the circuit holder 50. Further, in the circuit unit 40, the heat-sensitive electronic component 42 is disposed at a position far from the light-emitting module 10, while the heat-resistant electronic component 43 is disposed at a position near the light-emitting module 10. . In this way, it is possible to prevent the electronic component 42 which is susceptible to heat from being thermally destroyed by the heat generated in the light emitting module 10.
- the circuit unit 40 and the base 70 are electrically connected by electrical wiring (lead wires) 40c and 40d.
- the electrical wiring 40 c is connected to the shell portion 71 of the base 70 through the through hole 50 a provided in the circuit holder 50.
- the electrical wiring 40 d is connected to the eyelet portion 73 of the base 70 through the opening on the base side of the circuit holder 50.
- the circuit holder 50 is an insulating case for housing the circuit unit 40, and is housed in the housing 60 and the base 70.
- the circuit holder 50 is, for example, a substantially cylindrical case having both sides open, and a cylindrical first holder portion (large diameter portion) 51 substantially similar in shape to the housing 60 and a cylindrical first portion substantially identical in shape to the mouthpiece 70. And a holder (small diameter portion) 52.
- the first holder portion 51 located on the glove side is accommodated in the housing 60, and the first holder portion 51 accommodates most of the circuit unit 40.
- the second holder portion 52 located on the die side is accommodated in the mouthpiece 70, and the mouthpiece 70 is externally fitted to the second holder portion 52.
- the opening at the base of the circuit holder 50 is closed by this.
- the circuit holder 50 is preferably made of, for example, an insulating material such as a resin.
- the base 20 is located on the glove side of the circuit holder 50, the end of the circuit holder 50 on the glove side is not in contact with the base 20, and a gap is provided.
- the outer surface of 50 and the inner peripheral surface of the housing 60 are not in contact with each other, and a gap is provided.
- the heat generated in the light emitting module 10 is transferred to the circuit holder 50 via the base 20 and the housing 60. It is possible to suppress propagation. Thereby, since the temperature rise of the circuit holder 50 can be suppressed, it can prevent that the circuit unit 40 is thermally destroyed.
- the housing 60 is disposed between the glove 30 and the base 70.
- the housing 60 is a case which is open at both ends, and is formed of a substantially conical member having a substantially cylindrical shape whose diameter is reduced from the glove side to the mouthpiece side.
- the base 20 and the opening side end of the glove 30 are accommodated in the opening (first opening) on the glove side of the housing 60, and the housing 60 is fixed to the base 20 by caulking, for example. .
- the housing 60 may be fixed to the base 20 by pouring an adhesive into a space 60 a surrounded by the housing 60, the base 20 and the globe 30.
- the outer peripheral edge of the nozzle-side end of the base 20 has a tapered shape in accordance with the shape of the inner peripheral surface of the housing 60. Since the tapered surface of the base 20 is in surface contact with the inner peripheral surface of the housing 60, the heat transmitted from the light emitting module 10 to the base 20 is more easily conducted to the housing 60. Thereby, the heat generated in the semiconductor light emitting element 12 is conducted to the base 70 mainly through the base 20 and the housing 60 and further through the second holder portion 52 of the circuit holder 50, and the lighting apparatus Heat is dissipated to the side (not shown).
- the housing 60 in the present embodiment is made of a metal material.
- the case 60 functions as a heat sink, and the heat generated from the light emitting module 10 and the circuit unit 40 can be efficiently dissipated to the outside of the illumination light source 1 through the case 60.
- a metal material of the case 60 for example, Al, Ag, Au, Ni, Rh, Pd, an alloy of two or more of them, an alloy of Cu and Ag, or the like can be considered.
- a metal material has good thermal conductivity, so that the heat transmitted to the housing 60 can be efficiently transmitted to the die side. Therefore, the heat generated from the light emitting module 10 and the circuit unit 40 can be dissipated to the lighting apparatus side through the base 70.
- the housing 60 is made of an aluminum alloy material. Further, in order to improve the thermal emissivity of the housing 60, the surface of the housing 60 may be subjected to an alumite treatment.
- the material of the housing 60 is not limited to metal, and may be resin.
- the housing 60 can be made of a resin having a high thermal conductivity.
- the base 70 is a power receiving unit for receiving AC power by two contacts, and is attached to, for example, a socket of a lighting fixture. In this case, when the lighting light source 1 is turned on, the base 70 receives power from the socket of the lighting fixture. Further, the power received by the base 70 is input to the power input unit of the circuit unit 40 through the electrical wirings 40 c and 40 d.
- the base 70 includes a shell portion 71 which has a substantially cylindrical shape and whose outer peripheral surface is an external thread, and an eyelet portion 73 attached to the shell portion 71 via an insulating portion 72.
- An insulating ring 74 is provided between the shell portion 71 and the housing 60 in order to ensure insulation between the housing 60 and the base 70.
- the type of the base 70 is not particularly limited.
- a screw-in type Edison type (E type) base can be used, and examples include an E26 base, an E17 base, or an E16 base.
- the optical member 80 is a member for changing the traveling direction of the light emitted by the light emitting module 10, and is disposed in the envelope of the illumination light source 1.
- the optical member 80 may be disposed closer to the globe than the surface on which the light emitting module 10 is disposed.
- the optical member 80 can be disposed between the light emitting module 10 and the globe 30.
- the optical member 80 is fixed on the light emitting module 10.
- the optical member 80 in the present embodiment emits light from the light emitting module 10 so that the light emitted from the light emitting module 10 reaches the inner surface of the globe 30 with the maximum luminous intensity in the range of the emission angle of 30 ° to 60 °. It is configured to diffuse the emitted light.
- the emission angle is defined as 0 ° at the glove side direction along the lamp axis J and at 180 ° on the die side along the lamp axis J.
- the optical member 80 has, for example, a substantially columnar shape, and is disposed on the lamp axis J.
- the column axis of the optical member 80 and the lamp axis J coincide with each other.
- the column axis of the optical member 80 does not necessarily have to coincide with the lamp axis J.
- the column axis is the lamp axis J It is preferable that the column axis and the lamp axis J coincide with each other.
- the optical member 80 is formed, for example, of an outer portion 81 which is cylindrical and whose cylindrical axis is parallel to the lamp axis J, and a columnar inner portion 82 packed in the cylinder of the outer portion 81. More specifically, the overall shape of the optical member 80 is cylindrical, and the outer side 81 is cylindrical with a cylindrical axis coinciding with the lamp axis J, and the inner side 82 is a gap in the cylinder of the outer side 81 It has become a cylinder packed without.
- the outer side 81 and the inner side 82 are each made of a translucent material.
- the outer side portion 81 and the inner side portion 82 are configured such that the refractive index of the inner side portion 82 is lower than the refractive index of the outer side portion 81.
- the optical member 80 can change the advancing direction of the light which the light emitting module 10 emits by refracting and reflecting the light which the light emitting module 10 emits.
- resin materials such as a silicone and a polycarbonate, glass, or a ceramic etc. are mentioned, respectively.
- the outer portion 81 is made of glass having a refractive index of 1.50
- the inner portion 82 is made of silicone resin having a refractive index of 1.41.
- a light scatterer may be included in one or both of the outer portion 81 and the inner portion 82 to internally scatter the incident light.
- the light scatterer for example, colorless and transparent or colored and transparent particles composed of silica, alumina, zinc oxide, titania or the like can be considered.
- the shape of the particles may be, for example, a substantially spherical shape, and the diameter is preferably in the range of 0.1 ⁇ m to 40 ⁇ m in situ.
- the amount of the light scatterer added is preferably in the range of 10 wt% to 60 wt%.
- the front surface (the surface on the glove side) and the rear surface (the surface on the light emitting module side) of the optical member 80 are each plane and parallel.
- the front surface and the rear surface of the optical member 80 are not limited to flat surfaces.
- the front surface of the optical member 80 may be configured as a concave surface such as an inverted conical surface or a convex surface such as a conical surface so that the degree of diffusion of light emitted from the optical member 80 can be adjusted.
- the outer peripheral surface of the outer side portion 81 of the optical member 80 may be mirror-finished. As described above, the light emitted from the light emitting module 10 may be reflected on the outer surface of the optical member 80 to change the traveling direction of the light emitted from the light emitting module 10. Thus, light can be prevented from re-entering the inside of the optical member 80 from the outer peripheral surface of the outer side portion 81, and light incident to the outer side portion 81 can be reflected.
- a method of performing mirror surface processing for example, it is conceivable to form a reflective film such as a metal thin film or a dielectric multilayer film by a method such as a thermal evaporation method, an electron beam evaporation method, a sputtering method, or plating.
- the inner peripheral surface of the outer side portion 81 is in contact with the entire outer peripheral surface of the inner side portion 82, and there is no gap between the outer side portion 81 and the inner side portion 82. That is, the inner peripheral surface of the outer side portion 81 and the outer peripheral surface of the inner side portion 82 are the same surface and an interface between the outer side portion 81 and the inner side portion 82. There may be a gap between the outer side portion 81 and the inner side portion 82. However, if there is a gap, light loss occurs, so it is preferable that there is no gap.
- the optical member 80 is disposed at a position where the entire optical member 80 overlaps the sealing body 13 in a plan view. In this way, the entire optical member 80 is in contact with the sealing body 13, and thus the light emitted from the light emitting module 10 can be efficiently incident into the optical member 80.
- FIG. 3 is a plan view for explaining the arrangement of the light emitting module and the optical member in the illumination light source according to the first embodiment of the present invention.
- the optical member 80 is configured to be smaller than the sealing body 13 of the light emitting module 10 when viewed from the glove side. That is, the area on the light emitting module side of the optical member 80 is configured to be smaller than the area of the light emitting region of the light emitting module 10. In this manner, the sealing body 13 is not hidden by the optical member 80, and a part of the sealing body 13 can be exposed from the optical member 80.
- the area of the region hidden by the optical member 80 in the sealing body 13 is preferably 40% to 78% of the area of the entire surface of the sealing body 13. That is, the area of the light emitting module of the optical member 80 is preferably 40% to 78% of the area of the light emitting region of the light emitting module 10.
- the outer diameter R1 of the optical member 80 circular in plan view (the outer diameter of the outer portion 81) is 15 mm, and the length W3 of one side of the sealing body 13 square in plan view is 21 mm.
- the area of the region hidden by the optical member 80 in the sealing body 13 is about 40% of the area of the entire surface of the sealing body 13.
- the optical member 80 is simply installed so as not to protrude from the sealing body 13 Since the column axis of 80 can be made to coincide with the lamp axis J, the optical member 80 can be easily positioned.
- the height T of the optical member 80 shown in FIG. 2 is 15 mm
- the outer diameter R2 of the inner portion 82 shown in FIG. 3 is 10 mm
- the outer diameter R2 of the portion 82 is uniform over the entire height direction.
- FIG. 4 is a figure for demonstrating a mode when the light radiate
- FIG. 5 is a view for explaining how light emitted from the light emitting module is taken out to the outside of the illumination light source in the illumination light source according to the first embodiment of the present invention.
- the light emitted from the sealing body 13 of the light emitting module 10 is an optical member 80.
- the light beam passes through the optical member 80 toward the globe 30 or the light member 80 toward the globe 30 without passing through the optical member 80.
- light incident on the optical member 80 is further incident on the outer side portion 81 of the optical member 80 or incident on the inner side portion 82.
- the light entering the outer portion 81 from the rear surface (the surface on the light emitting module side) of the outer portion 81 is the outer peripheral surface and the inner portion of the outer portion 81 as shown by the light path L1 in FIG. 4.
- the reflection is repeated between the circumferential surfaces, and the light is emitted to the outside of the optical member 80 from the front surface (the surface on the glove side) of the outer portion 81.
- the reason why light incident on the outer portion 81 is reflected by the outer peripheral surface of the outer portion 81 is that the material of the outer portion 81 has a refractive index higher than that of air, and the light is incident on the outer portion 81 The light is reflected on the inner circumferential surface because the material of the outer portion 81 has a higher refractive index than the material of the inner portion 82.
- light entering the outer portion 81 of the optical member 80 is less likely to leak out of the outer portion 81 due to the difference in refractive index between the outer portion 81 and the medium adjacent to the outer portion 81.
- the light passes through the inside of the optical system 80 and is emitted from the front surface of the outer side 81 to the outside of the optical member 80.
- the light incident on the inner portion 82 is transmitted through the outer peripheral surface without being reflected by the outer peripheral surface of the inner portion 82.
- the reason is that the refractive index of the inner portion 82 is lower than the refractive index of the outer portion 81.
- the light incident on the outer portion 81 from the inner portion 82 is between the outer circumferential surface and the inner circumferential surface of the outer portion 81. Repeat reflection, and emit light from the front surface of the outer portion 81 to the outside of the optical member 80 as shown by the light path L1.
- the light incident on the optical member 80 is collected at the outer portion 81 formed of a material having a higher refractive index, and is mainly emitted from the outer portion 81.
- the light emitted from the outer portion 81 is not mainly emitted forward along the lamp axis J, but is diffused by the optical member 80 and is mainly in the range of 30 ° to 60 ° with respect to the lamp axis J Emit at an emission angle of
- the reason why the emission angle does not become 0 ° but becomes such an angle is that most of the light incident in the outer part 81 does not travel straight along the lamp axis J in the outer part 81, and the outer part 81 It is because it travels while internally reflecting inside in a zigzag.
- light collected from the inner part 82 to the outer part 81 enters the outer part 81 at an angle not parallel to the lamp axis J, and therefore travels in a zigzag in the outer part 81.
- the light traveling in a zigzag direction does not go straight in the direction along the lamp axis J even after being emitted from the optical member 80, but goes in a diagonally forward direction inclined with respect to the lamp axis J. Since there are a large amount of light emitted toward such an oblique front, the light emitted from the optical member 80 as a whole is mainly emitted at an emission angle in the range of 30 ° to 60 ° with respect to the lamp axis J .
- the light emitted from the light emitting module 10 is diffused by the optical member 80 so as to reach the inner surface of the globe 30 with the maximum luminous intensity in the range of the emission angle of 30 ° to 60 ° with respect to the lamp axis J. As shown in FIG. 5, more light reaches the region of the glove 30 closer to the base side.
- the light which does not enter the optical member 80 is, as shown by the optical path L3 in FIG. 4 and FIG.
- the luminous intensity reaches the maximum directly in the substantially parallel direction and reaches the glove 30 directly.
- the illumination light source 1 when the light emitted from the light emitting module 10 passes through the optical member 80, more light reaches the region closer to the base of the globe 30. It will be. Thereby, the light distribution angle of the illumination light source 1 can be expanded. In the present embodiment, since the inner surface of the glove 30 is subjected to diffusion processing, the light that has reached the glove 30 is further diffused by the glove 30.
- the globe 30 since the globe 30 has the bulging portion 31, the light reaching the bulging portion 31 is urged to the base by the bulging portion 31 and taken out of the glove 30. . Thereby, the light distribution angle of the illumination light source 1 can be expanded.
- the conventional bulb-shaped LED lamp shown in FIG. 14 has a structure in which the bottom portion of the globe 1030 is expanded with respect to the Lambertian light distribution ( ⁇ 120 °) of the narrow emission angle LED. ing. That is, the globe 1030 in the conventional light bulb-shaped LED lamp is configured such that the bottom portion has the maximum opening diameter.
- the bulging portion 31 is provided in the glove 30, the maximum opening diameter of the glove 30 is not the bottom portion of the glove 30 but the bulging portion 31. Thereby, even if it is Lambertian light distribution ( ⁇ 120 °), the light reaching the bulging part 31 is urged to the base by the bulging part 31 and is taken out of the glove 30. A wide light distribution angle of ⁇ 170 ° or more can be realized.
- the case where the light reaches the bulging part 31 means the case where the light emitted from the light emitting module 10 directly reaches the bulging part 31 and the case where the light indirectly reaches the bulging part 31 Is considered.
- the light indirectly reaches the bulging portion 31 when the light passing through the optical member 80 (light passing through the optical member) reaches, the light reflected by the optical member 80, the globe 30, the light emitting module 10 or the like It is conceivable that the reflected light) reaches or the light diffused by the globe 30 (diffuse light) reaches.
- the front surface (surface on the glove side) of the optical member 80 is positioned forward of the glove-side end of the housing 60 in the direction along the lamp axis J. Is preferred. Furthermore, it is more preferable that the front surface (surface on the glove side) of the sealing body 13 be located on the front side in the direction along the lamp axis J than the glove side end of the housing 60.
- the illumination light source 1 As described above, according to the illumination light source 1 according to the present embodiment, even in the case where the light emitting module 10 having a narrow light emission angle is planarly disposed, the light extracted from the globe 30 to the outside is bulged. Since it can be made to turn to the nozzle
- the emission angle of the light emitting module 10 can be expanded by the optical member 80, the light distribution angle of the illumination light source 1 can be further expanded.
- the outer portion 81 of the optical member 80 is cylindrical and exists over the entire outer periphery of the optical member 80, the emission angle can be expanded over the entire periphery around the lamp axis J. Thereby, the light distribution angle of the illumination light source 1 can be further expanded.
- FIG. 6 is a light distribution curve diagram of the illumination light source according to Embodiment 1 of the present invention.
- FIG. 7 is a view showing a light distribution of a light distribution curve in the illumination light source according to Embodiment 1 of the present invention.
- the light distribution curve diagram in FIG. 6 represents the magnitude of the luminous intensity in each direction of 360 ° including the vertical direction of the illumination light source 1, and the forward direction along the lamp axis J of the illumination light source 1 is 0
- a scale is drawn at intervals of 10.degree. Clockwise and counterclockwise with 180.degree. (-180.degree.) As the backward direction along the lamp axis J.degree.
- the scale (0.1 to 1.0) in the radial direction of the light distribution curve represents the light intensity, and the light intensity is a relative magnitude with the maximum value of each light distribution curve as 1.0 (100%). Is represented.
- FIG. 6 shows the light intensity in the range of ⁇ 180 ° to + 180 ° with reference to the lamp axis J of the illumination light source.
- a curve indicated by a two-dot chain line indicates a light distribution curve of the incandescent lamp.
- the curve shown by the broken line is the distribution of the illumination light source (illumination light source according to the comparative example) when the globe 30 (the bulging portion 31) and the optical member 80 are removed from the illumination light source 1 according to the first embodiment.
- the light curve (“comparative example") is shown.
- a curve indicated by a solid line indicates a light distribution curve ("the present invention") of the illumination light source 1 according to the first embodiment of the present invention.
- the light distribution characteristics were evaluated based on the light distribution angle.
- the light distribution angle refers to the size of an angular range in which a light intensity of half or more of the maximum value of the light intensity in the illumination light source is emitted.
- the light distribution angle is the size of the angle range in which the light intensity is 0.5 (50%) or more.
- FIG. 7 shows the light distribution of the light distribution curve shown in FIG. 6, and shows the relationship between the angle and the light intensity when the lamp axis of the light source for illumination is taken as a reference (0 °).
- the light distribution angle of the incandescent lamp is about 310 °. That is, the luminous intensity distribution curve of an incandescent lamp is in the range of about -155 ° to about + 155 ° with respect to the central axis of the incandescent lamp with a light intensity which is 1/2 or more of the central luminous intensity at the central axis of the incandescent lamp. Characteristics are shown.
- the light distribution angle of the light source for illumination which concerns on a comparative example is about 120 degrees. That is, in the light distribution curve of the illumination light source according to the comparative example, the luminous intensity which is 1/2 or more of the central luminous intensity at the central axis of the illumination light source is about -60 ° to about 60 based on the central axis of the illumination light source. The characteristic is shown to be in the range of + 60 °.
- the luminous intensity in the range of -170 ° to + 170 ° or less with respect to the central axis of the illumination light source is the central luminous intensity at the central axis of the illumination light source. It is configured to be 1/2 or more of Thereby, as shown in FIG. 6, the light distribution angle of the light source 1 for illumination which concerns on this Embodiment is about 340 degrees. That is, the luminous intensity distribution curve of the illumination light source according to the present invention has a luminous intensity which is 1/2 or more of the central luminous intensity at the central axis of the illumination light source with respect to the central axis of the illumination light source. The characteristic is shown to be in the range of + 170 °.
- a portion surrounded by the light distribution curve of the illumination light source 1 when the maximum value of the luminous intensity in the light distribution curve of the illumination light source 1 according to the present embodiment is 1.
- S1 is the area of the portion surrounded by the light distribution curve of the incandescent lamp when the maximum value of light intensity in the light distribution curve of the incandescent lamp is 1 ing. That is, the overlap of the light distribution pattern of the illumination light source 1 according to the present embodiment and the normalized light distribution pattern of the incandescent lamp is 90% or more.
- the light source for illumination 1 can realize the light distribution characteristic having a wider light distribution angle than the incandescent lamp and the light source for illumination according to the comparative example. That is, by providing the globe 30 having the bulging portion 31 and the optical member 80, the emitted light from the light emitting module 10 can be made to travel in a wide range, and the light distribution angle of the illumination light source 1 is spread and the light distribution is good. It can be seen that light characteristics can be realized.
- the light distribution distribution indicating the relationship between the angle in the light distribution curve and the light intensity has a recess, and the light intensity at one angle is
- an angle range low light intensity angle range
- the absolute value is lower than the light intensity at an angle whose absolute value is larger than the one angle.
- the light intensity gradually decreases as the absolute value of the angle decreases.
- the light intensity is the smallest at an angle of 0 °.
- the light distribution angle of the light source for illumination can be easily expanded by setting the light distribution curve such that the light distribution has a concave. That is, when the luminous flux from the light source (light emitting module) is made constant, considering that the luminous intensity distribution curve can be determined depending on how the luminous flux is distributed, by providing a recess in the luminous intensity distribution, The light of the recess can be used as light of another angle by the amount of the recess of the light distribution. And in the light source 1 for illumination which concerns on this Embodiment, the light distribution angle is expanded by allocating the light (available light) of this recess to the area
- the degree of light intensity decreases with decreasing absolute value of the angle. It is preferable to construct so that
- the emitted light from the light emitting module 10 reaches the inner surface of the globe 30 with the maximum luminous intensity in the range of the emission angle of 30 ° to 60 ° by the optical member 80. If the exit angle is less than 30 °, the spread of the light distribution angle is not sufficient, and good light distribution characteristics can not be obtained. If the exit angle exceeds 60 °, the light traveling toward the glove side along the lamp axis J is This is because the amount is insufficient and the upper side becomes dim.
- the shape of the optical member 80 is substantially cylindrical, but it is not limited to this.
- an approximately square prism optical member may be used, which is configured of a substantially square tubular outer portion and a substantially prismatic inner portion.
- a column other than the substantially cylindrical shape and the substantially square prism may be used, or a shape other than the column may be used.
- uniform light distribution can be easily realized over the entire circumference centered on the lamp axis J.
- the shape of the front surface of the sealing body 13 which is the light emitting surface on the glove side is substantially square, but it is not limited thereto.
- the shape of the front surface of the sealing body 13 in the light emitting module 10 may be substantially circular, the center of which is located on the lamp axis J. This makes it easy to obtain uniform light distribution over the entire circumference centered on the lamp axis J.
- the optical member 80 in the present embodiment is smaller than the sealing body 13 of the light emitting module 10 when viewed from the glove side, but may be larger than the sealing body 13 of the light emitting module 10. In this way, the light emitted from the light emitting module 10 can be further diffused by the optical member 80. However, since the light emitted from the light emitting module 10 does not reach the inner surface of the glove 30 directly, the amount of light traveling toward the glove side along the lamp axis J is reduced.
- the shape may be a drum shape in which the outer diameter is reduced (the outer diameter of the middle portion is reduced) in the middle portion in the vertical direction, and a substantially truncated cone shape in which the outer diameter R1 increases toward the base It may be a substantially truncated cone shape in which the outer diameter R1 increases toward the glove side.
- the optical member 80 in the present embodiment is configured of the outer portion 81 and the inner portion 82 and has a two-layer structure in the radial direction, it may have three or more layers in the radial direction. Even in that case, if all the layers are formed of the translucent material and the refractive index of the translucent material is higher as the outer layer is, the emission light from the light emitting module 10 has an emission angle in the range of 30 ° to 60 °. The emitted light can be diffused to reach the inner surface of the globe 30 with the maximum luminous intensity.
- one light emitting module 10 and one optical member 80 are provided in the present embodiment, a plurality of light emitting modules 10 and a plurality of optical members 80 may be provided.
- one of the five light emitting modules is disposed on the lamp axis J, and the remaining four light emitting modules are planarly disposed in point symmetry about the lamp axis J, and one optical is placed on each light emitting module A member can be provided.
- the light emitting module and the optical member for example, those in which the sizes of the light emitting module 10 and the optical member 80 described above are reduced can be used.
- one optical member 80 is provided on one light emitting module 10, but a plurality of optical members may be provided on one light emitting module 10.
- one of the five optical members is disposed on the lamp axis J, and the other four optical members are centered on the lamp axis J at a position overlapping the sealing body 13 of the light emitting module 10 when viewed from the glove side.
- the optical member for example, one in which the size of the above-mentioned optical member 80 is reduced can be used as the optical member.
- one optical member 80 is provided on one light emitting module 10 in the present embodiment, one optical member 80 may be provided on a plurality of light emitting modules.
- one of the five light emitting modules is arranged on the lamp axis J, and the remaining four light emitting modules are arranged in a point symmetrical manner about the lamp axis in a plane, and one optical member 80 is It can be provided on the globe side of the five light emitting modules with the lamp axis J aligned.
- an optical member is provided so as to completely cover the sealing body of the light emitting module disposed on the lamp axis J and cover about half of the sealing body of the four light emitting modules disposed in the four directions. 80 can be arranged.
- the light emitting module for example, one in which the size of the light emitting module 10 is reduced can be used.
- the light emitted from each light emitting module is contained in the optical member 80 by filling the space between the sealing bodies of adjacent light emitting modules with a translucent material such as a resin. You may comprise so that it may inject efficiently.
- the optical member 80 is not limited to the above embodiment, and the reflection and transmission of light can be adjusted by changing the material (refractive index etc.) constituting the optical member 80.
- the light distribution angle can be finely adjusted.
- the light distribution angle can be finely adjusted by changing the position and size of the optical member 80.
- FIG. 8 is a partially cutaway perspective view of the illumination light source according to Embodiment 2 of the present invention.
- FIG. 9 is a cross-sectional view of the illumination light source according to the embodiment of the present invention.
- FIG. 10 is an enlarged sectional view showing a portion surrounded by a two-dot chain line in FIG.
- the illumination light source 2 includes a light emitting module 210, a base 220, a globe 30, a circuit unit 40 (not shown in FIG. 8), and a circuit holder 250 (FIG. 8). (Not shown), a housing 60, a base 70, an optical member 280 and a cap member 290. About the same member as Embodiment 1, the same numerals as Embodiment 1 are used.
- the light source 2 for illumination has an envelope constituted by the globe 30, the housing 60, and the base 70, and the light emitting module 210 and the optical member 280 are accommodated in the envelope. There is.
- the illumination light source 2 has the light intensity within a predetermined angle range of -170 ° or more and + 170 ° or less with reference to the lamp axis J of the illumination light source 2. It is configured to be 1/2 or more of the central luminous intensity at the lamp axis J of the illumination light source 2.
- the configuration is realized by the bulging portion 31 of the glove 30 and the optical member 280.
- the configuration can be realized only by the optical member 280 without using the bulging portion 31.
- the light emitting module 210 covers the mounting substrate 211, the plurality of semiconductor light emitting elements 212 as light sources mounted on the mounting substrate 211, and the semiconductor light emitting elements 212. And a sealing body 213 provided on the mounting substrate 211.
- the mounting substrate 211 is a substantially annular substrate having a substantially circular hole 214 at the center, and has a tongue piece 215 extended from one point on the inner peripheral edge of the hole 214 toward the center of the hole 214.
- a connector 216 to which the electrical wiring 40a of the circuit unit 40 is connected is provided on the front surface of the tongue piece 215, and the light emitting module 210 and the circuit unit 40 are electrically connected by connecting the electrical wiring 40a to the connector 216.
- the electrical wiring 40 b of the circuit unit 40 is not shown, the electrical wiring 40 b is similarly connected to the connector of the mounting substrate 211.
- the semiconductor light emitting element 212 is an LED chip, and for example, 32 LED chips are annularly mounted on the front surface of the mounting substrate 211. Specifically, 16 pairs of semiconductor light emitting elements 212 arranged along the radial direction of mounting substrate 211 are annularly arranged at equal intervals along the circumferential direction of mounting substrate 211. ing.
- the ring includes not only a ring but also a polygonal ring such as a triangle, a quadrangle, and a pentagon. Therefore, the semiconductor light emitting device 212 may be mounted in, for example, an elliptical or polygonal ring shape.
- the semiconductor light emitting elements 212 are individually sealed by a substantially rectangular parallelepiped sealing body 213 for each set. Therefore, in the present embodiment, the total number of sealing bodies 213 is sixteen.
- the longitudinal direction of each sealing body 213 coincides with the radial direction of the mounting substrate 211, and when viewed along the lamp axis J from the front side (in plan view), arranged radially about the lamp axis J It is done.
- the base 220 is, for example, a substantially thin cylindrical shape having a through hole 220 a, and the cylinder axis of the base 220 is disposed in a posture in which it coincides with the lamp axis J.
- the light emitting module 210 is mounted on the front surface of the base 220 with the semiconductor light emitting elements 212 facing forward in the main emission direction. Since the through holes 220a are provided in the base 220, the weight of the illumination light source 2 can be reduced. Moreover, since a part of the circuit unit 40 is disposed in the through hole 220a and in the globe 30 via the through hole 220a, the illumination light source 2 can be miniaturized.
- the circuit holder 250 is housed in the housing 60 and the base 70 as in the first embodiment.
- the circuit holder 250 in the present embodiment is a substantially cylindrical case opened on both sides, and the first holder portion (large diameter portion) 251 penetrating the through hole 220 a of the base 220 and the cap 70 are outside. It is comprised with the 2nd holder part (small diameter part) 252 which is fitted.
- a bottomed cylindrical cap member 290 is attached to the glove-side end of the first holder portion 251, and the circuit unit 40 is accommodated inside the first holder portion 251 and the cap member 290.
- the circuit holder 250 and the cap member 290 constitute an insulating case for housing the circuit unit 40.
- the circuit holder 250 and the cap member 290 are preferably made of, for example, an insulating material such as a resin.
- the circuit holder 250 is provided with a through hole 257 at a position corresponding to the tongue piece 215 of the light emitting module 210.
- the tip of the tongue piece 215 is inserted into the circuit holder 250 through the through hole 257, and the connector 216 provided on the tongue piece 215 is located in the circuit holder 250.
- the circuit holder 250 and the base 220 are not in contact with each other, and between the outer surface of the circuit holder 250 (first holder portion 251) and the peripheral surface of the through hole 220a of the base 220. There is a gap in the Therefore, the heat generated in the light emitting module 210 can be suppressed from propagating to the circuit holder 250. Thereby, since the temperature rise of the circuit holder 250 can be suppressed, it can prevent that the circuit unit 40 is thermally destroyed.
- the cap member 290 is a closed-end cylindrical tubular shape in which the glove side is closed and the die side is open, and the first cap portion 291 gradually reduced in diameter toward the glove side and a cylinder whose diameter is uniform in the vertical direction And a second cap portion 292.
- the first cap portion 291 is located in the glove 30, and the second cap portion 292 is located in the through hole 283 of the optical member 280.
- a gap is provided between the second cap portion 292 and the optical member 280. Therefore, the heat generated in the light emitting module 210 can be suppressed from propagating to the circuit holder 250 via the optical member 280. Thereby, since the temperature rise of the circuit holder 250 can be suppressed, it can prevent that the circuit unit 40 is thermally destroyed.
- the optical member 280 is a member for changing the traveling direction of the light emitted by the light emitting module 210 as in the first embodiment. Also in the present embodiment, the optical member 280 is disposed between the light emitting module 210 and the globe 30, and is disposed on the globe side of the light emitting module 210.
- the optical member 280 has the light emitting module 210 so that the light emitted from the light emitting module 210 reaches the inner surface of the globe 30 with the maximum luminous intensity in the range of the emission angle of 30 ° to 60 °. It is comprised so that the emitted light from can be diffused.
- the optical member 280 in the present embodiment is different in shape from the optical member 80 in the first embodiment, and has a substantially truncated cone shape having a substantially cylindrical through hole 283 at the center (the outer diameter becomes larger toward the front side) And the lamp axis J coincides with the central axis of the optical member 280 (which is also the central axis of the outer portion 281 and the inner portion 282 described later).
- the central axis of the optical member 280 need not necessarily coincide with the lamp axis J. However, in order to obtain uniform light distribution over the entire circumference around the lamp axis J, the central axis is the lamp axis J. It is preferable that the central axis and the lamp axis J coincide with each other.
- the optical member 280 has an approximately frusto-conical shape (approximately frusto-conical shape in which the outer diameter increases toward the glove side) having a substantially cylindrical through hole at the center, and as shown in FIG. It is comprised by the outer side part 281 provided so that the plane (rear surface) at the side of the light emitting module in 282 and the outer periphery inclined surface following the said rear surface may be covered.
- the outer side portion 281 and the inner side portion 282 are respectively made of the same translucent material as the outer side portion 81 and the inner side portion 82 in the first embodiment.
- the optical member 280 can change the traveling direction of the light emitted by the light emitting module 210 by refracting and reflecting the light emitted by the light emitting module 210.
- the front surface (upper surface) of the optical member 280 is composed of the front surface (upper surface) of the outer side portion 281 and the front surface (upper surface) of the inner side portion 282.
- the rear surface of the optical member 280 is configured by the rear surface of the outer side portion 281.
- the outer peripheral surface of the optical member 280 is constituted by the outer peripheral inclined surface of the outer side portion 281. There is no gap between the outer side portion 281 and the inner side portion 282.
- the front surface and the rear surface of the optical member 280 are planes orthogonal to the lamp axis J, and the outer peripheral inclined surface of the optical member 280 is an inclined surface inclined with respect to the lamp axis J.
- the front surface and the rear surface of the optical member 280 are not limited to flat surfaces.
- the front surface of the optical member 280 may be a concave surface such as an inverted conical surface or a convex surface such as a conical surface.
- the degree of diffusion of the emitted light may be adjusted.
- the rear surface of the optical member 280 to be in contact with the front surface of the sealing body 213 is preferably a flat surface.
- the light emitted from the sealing body 213 of the light emitting module 210 enters from the rear surface of the outer portion 281 into the outer portion 281 and is further reflected by the outer peripheral inclined surface of the inner portion 282 As shown by an optical path L4 in the figure, internal reflection is repeated in the outer side portion 281, and the light is emitted from the front surface of the outer side portion 281 to the outside of the optical member 280.
- the light emitted from the sealing body 213 of the light emitting module 210 and incident from the rear surface of the outer portion 281 into the outer portion 281 and further incident to the rear surface of the inner portion 282 is, for example, as shown by an optical path L5 in FIG.
- the light is transmitted through the inner portion 282 and emitted from the front surface of the inner portion 282 to the outside of the optical member 280. Further, for example, as shown by an optical path L5 'in FIG.
- the light incident on the outer side portion 281 repeats internal reflection in the outer side portion 281 and is emitted from the front surface of the outer side portion 281 to the outside of the optical member 280.
- the light emitted from the sealing body 213 of the light emitting module 210 and reflected by the outer peripheral inclined surface of the outer side portion 281 travels obliquely backward as shown by, for example, an optical path L6 in the same figure.
- the outer peripheral sloped surface of the outer side portion 281 may be mirror-finished.
- the light emitted from the light emitting module 210 may be reflected on the outer surface of the optical member 280 to change the traveling direction of the light emitted from the light emitting module 210.
- light can be prevented from re-incident from the outer peripheral inclined surface into the outer portion 281, and light incident to the outer portion 281 can be reflected.
- a reflective film such as a metal thin film or a dielectric multilayer film is formed by a method such as a thermal evaporation method, an electron beam evaporation method, a sputtering method, or the like. Is considered.
- the light emitted from the light emitting module 210 is diffused by the optical member 280 so as to reach the inner surface of the globe 30 with the maximum luminous intensity in the range of the emission angle of 30 ° to 60 °.
- the light emitted from the light emitting module 210 can be reflected by the outer surface of the optical member 280.
- more light can reach the region closer to the base on the inner surface of the globe 30, so the light distribution angle of the illumination light source 2 can be expanded.
- the inner surface of the glove 30 is subjected to diffusion processing, the light that has reached the glove 30 is further diffused by the glove 30.
- the light reaching the bulging portion 31 is urged to the base by the bulging portion 31 and the glove is 30 will be taken out. Thereby, the light distribution angle of the illumination light source 2 can be expanded.
- the front surface and the outer peripheral inclined surface of the optical member 280 are positioned closer to the glove in the direction along the lamp axis J than the glove side end of the housing 60 Is preferred. Furthermore, it is more preferable that the front surface (surface on the glove side) of the sealing body 213 be located on the glove side in the direction along the lamp axis J than the glove side end of the housing 60.
- the same effect as that of the first embodiment can be obtained.
- the light extracted to the outside from the globe 30 can be caused to go around to the base by the bulging portion 31.
- the light distribution angle of the light source 2 can be expanded.
- the light emission angle of the light emitting module 210 can be expanded by the optical member 280, the light distribution angle of the illumination light source 1 can be further expanded.
- the outer side portion 281 of the optical member 280 exists over the entire outer periphery of the optical member 280, the light emission angle can be expanded over the entire periphery around the lamp axis J. Thereby, the light distribution angle of the illumination light source 1 can be further expanded.
- the same light distribution curve as that of the first embodiment can be realized. That is, also in the present embodiment, the light intensity which is 1/2 or more of the central light intensity at the central axis of the illumination light source is in the range of about -170 ° to about + 170 ° with respect to the central axis of the illumination light source. Light distribution curve is obtained. In addition, the area of the portion surrounded by the light distribution curve of the illumination light source 2 when the maximum value of the luminous intensity in the light distribution curve of the illumination light source 2 according to the present embodiment is 1 is S1 ′.
- the overlapping ratio with the standardized light distribution pattern of the incandescent lamp is 90% or more.
- the light distribution in the light distribution curve has a recess.
- FIG. 11 is a view showing an arrangement relationship between an optical member and a light emitting module in an illumination light source according to a first modification of the present invention.
- the optical member 80 is disposed in a hollow configuration in the globe 30 (not shown) so that the optical member 80 and the sealing body 13 of the light emitting module 10 do not contact. That is, the optical member 80 and the light emitting module 10 are separated, and the optical member 80 is disposed above the light emitting module 10 such that a gap is formed between the optical member 80 and the light emitting module 10.
- the light distribution angle of the illumination light source can be finely adjusted by adjusting the distance D between the light emitting module 10 and the optical member 80.
- the optical member 80 be larger than the light emitting region of the light emitting module 10 in a plan view. That is, it is preferable that the area on the light emitting module side of the optical member 80 be larger than the area of the light emitting region (the sealing body 13) of the light emitting module 10.
- the length of the optical member 80 (the width of the optical member in the figure) in a plane perpendicular to the lamp axis J is the length of the light emitting region (the sealing body 13) of the light emitting module 10 (the encapsulant 13 in the figure). Should be longer than the width of
- the amount of light that can be reflected by the lower surface (rear surface) of the optical member 80 can be increased, so that the amount of light that reaches the bulging portion 31 of the glove 30 can be further increased. Therefore, the light distribution angle of the illumination light source can be more easily expanded.
- FIG. 12 is a view for explaining the diffusion processing applied to the globe in the illumination light source according to the second modification of the present invention, and is a cross-sectional view cut along a plane including the lamp axis J.
- the light emitting module is formed by forming a region of double depression structure in which smaller depressions (dimples) are uniformly formed in each of the uniformly formed minute depressions (dimples).
- the emitted light of 10 can be diffused by the globe 30A to further extend the light distribution range to the base side.
- the light distribution range can be effectively changed. It can be spread to the side.
- the double depression structure is formed in the bulging portion 31, but the double depression structure is formed in the region other than the bulging portion 31 in order to finely adjust the light distribution angle and the like. It does not matter.
- FIG. 13 is a partially cutaway perspective view of the illumination light source according to the third modification of the present invention.
- the light emitting module 10A in the present modification is a light emitting module of multi-face emission and has a polyhedral structure.
- the light emitting module 10A can be configured, for example, by arranging LED elements in multiple planes on each surface of the base of the cube (excluding the surface on the side of the base 20), as shown in FIG. In FIG. 13, nine surface mount device (SMD) type LED elements are arranged in a matrix on each surface of a cube.
- SMD surface mount device
- the SMD type LED element is a package type light emitting element, and for example, a resin container having a recess (cavity), an LED chip mounted in the recess, and a sealing member enclosed in the recess And (phosphor-containing resin).
- the light emitting module 10A having a three-dimensional structure configured as described above can emit light at a wide light distribution angle, so the light flux incident on the bulging portion 31 can be easily enlarged. Thereby, even if it does not use an optical member, the light source for illumination with a wide light distribution angle can be implement
- the light emitting module 10A has the SMD structure in this modification, the light emitting module may have a chip on board (COB) structure in which an LED chip is directly mounted on a base and sealed with a sealing member.
- COB chip on board
- the entire shape of the globe 30 is substantially spherical (for example, in the case of a shape conforming to the G format defined in JIS C7710)
- the light emitting region of the light emitting module 10 in plan view The area is preferably less than or equal to a predetermined value with respect to the area of the area inside the glove opening on the upper surface of the base 20.
- the emitted light of the highly directional LED is not uniformly projected on the inner surface of the globe, and the light intensity unevenness becomes remarkable.
- the LED lamp conforming to the G format is a highly decorative lamp used for store lighting etc., it is easy for the entire glove to be visible to the user, and the designability when the lightness unevenness becomes remarkable The negative impact on the situation is great. That is, in the case of a ball bulb in which the entire shape of the globe 30 is substantially spherical, uniformity of luminance is required.
- the area of the light emitting area of the light emitting module 10 be 8% or less of the area of the area inside the glove opening on the upper surface of the base 20.
- the light emitting region is a region in which the sealing body 13 is formed, and the region within the glove opening on the upper surface of the base 20 is a cut when the illumination light source is cut with a plane passing through the upper surface of the base 20 It is a face.
- the optical member was set as the 2 layer structure of the outer side part comprised by the material from which a refractive index differs, and an inner side, it does not restrict to this.
- the optical member may be made of only a single material.
- the optical member may be a reflector, a half mirror, a mirror ball or the like. Even with such an optical member, the light distribution range can be extended to the base side, so the light distribution angle of the illumination light source can be expanded.
- the shape of the optical member is a cylindrical shape or a cylindrical truncated cone shape, but it is not limited to this.
- the shape of the optical member may be a cover-like member.
- the optical member may be configured in the shape of a cover similar in shape to the globe 30. Thereby, it can be set as a light source for illumination which has double gloves, the 1st layer glove becomes a member which covers a light emitting module, the 2nd layer glove covers the 1st layer glove, and an envelope is constituted. Become a member to In this case, the material of the optical member can be the same as that of the glove 30.
- the shape of the cover-like optical member may be partially changed in shape in order to reflect and diffuse the light from the light emitting module as desired without making the shape similar to that of the globe 30.
- the semiconductor light emitting element in the light emitting module is formed only on one side of the mounting substrate, but the present invention is not limited to this.
- the mounting base on which the semiconductor light emitting device is mounted may be a rectangular parallelepiped or the like, and the semiconductor light emitting device may be configured to be mounted on at least two surfaces of the mounting base.
- the mounting base can be a cube, and a plurality of semiconductor light emitting elements can be mounted on the upper surface and the four side surfaces of the mounting base.
- the light emitting module in which the semiconductor light emitting elements are three-dimensionally arranged can be configured, and the light of the light emitting module can be easily emitted toward the vicinity (lateral direction) of the bulging portion 31 of the globe 30. Therefore, since the light distribution range can be easily extended to the base, the light distribution angle of the illumination light source can be easily expanded.
- globe 30 were comprised by the smooth curved surface shape without a corner, it does not restrict to this.
- the glove can be constituted by a polyhedron.
- the shape of the inner surface or the outer surface of the glove can be constituted by the surface shape of the polyhedron.
- the light source may be a clear bulb type illumination light source in which the envelope is configured by a globe and a cap that conform to the A-shape (JIS C7710) that is a general incandescent bulb globe.
- the LED module is disposed in a hollow state in the glove. For example, by providing a stem (supporting post) provided so as to extend inward of the glove and directly fixing the LED module to the top of the stem, the LED module is floated in the glove like a filament coil. It can be arranged in the state.
- the envelope may be configured using a resin case in addition to the globe and the mouthpiece.
- a metal holding member can be provided in the resin case, and a metal stem can be disposed on the holding member.
- the light source for the clear bulb type illumination it is possible to reduce the number of light shielding members (housing etc.) present on the base side of the LED module, so it is possible to further expand the light distribution angle. Become.
- a lighting device includes the lighting light source described above and a lighting fixture to which the lighting light source is attached.
- the lighting fixture is for turning off and lighting the illumination light source, and includes, for example, a fixture body attached to a ceiling, and a cover covering the illumination light source.
- the fixture body is equipped with a socket for mounting a base of the illumination light source and supplying power to the illumination light source.
- the structure of the LED in the light emitting module may be any structure such as a COB type or an SMD type.
- the present invention can be widely used for lighting in general as a lamp replacing conventional incandescent lamps and the like, particularly as a bulb-shaped lamp and a lighting apparatus and the like including the same.
- Reference Signs List 1 2 illumination light source 10, 10A, 210 light emitting module 11, 211 mounting substrate 12, 212 semiconductor light emitting element 13, 213 sealing body 20, 220 base 20a, 220a, 257, 283 through hole 30, 30A glove 31, 31A bulging portion 40 circuit unit 40a, 40b, 40c, 40d electrical wiring 41 circuit board 42, 43 electronic component 50, 250 circuit holder 50a through hole 51, 251 first holder portion 52, 252 second holder portion 60 housing 60a Space 70 base 71 shell part 72 insulation part 73 eyelet part 74 insulation ring 80, 280 optical member 81, 281 outer part 82, 282 inner part 214 hole part 215 tongue piece part 216 connector 290 cap member 291 first cap part 292 second Cap part
Abstract
Description
まず、本発明の実施の形態1に係る照明用光源の構成について、図1及び図2を用いて説明する。図1は、本発明の実施の形態1に係る照明用光源の一部切り欠き斜視図である。図2は、本発明の実施の形態1に係る照明用光源の断面図である。なお、図1及び図2において、紙面上方が照明用光源の前方であり、紙面下方が照明用光源の後方である。ここで、本明細書において、「前方」とは、照明用光源の上端(グローブの頂部)と照明用光源の下端(口金の頂部)との中点を照明用光源の中心とすると、当該中心から見てグローブ側の方向のことであり、「後方」とは、照明用光源の中心から見て口金側の方向のことである。また、図2において、紙面上下方向に沿って描かれた一点鎖線は照明用光源のランプ軸J(中心軸)を示しており、本実施の形態において、ランプ軸Jとグローブ軸とは一致している。また、ランプ軸Jとは、照明用光源1を照明装置(不図示)のソケットに取り付ける際の回転中心となる軸であり、口金70の回転軸と一致している。
発光モジュール10は、例えば所定の光を放出するLEDモジュールであって、グローブ30の内方に配置されている。図2に示すように、発光モジュール10は、実装基板11と、実装基板11に実装された半導体発光素子12と、半導体発光素子12を封止するように実装基板11上に形成された封止体13とを備える。なお、本実施の形態において、発光モジュール10は、ランプ軸Jと実装基板11とが交差するように配置されている。
基台20は、発光モジュール10を載置するための光源取り付け部材であり、例えば、ランプ軸Jと直交するような平面を有する略円板状の基板である。基台20の一方の面には、発光モジュール10を平面配置させるための凹部が形成されている。凹部に配置された発光モジュール10は、例えば、止め金具、ねじ、接着などにより基台20に固定されている。
グローブ30は、発光モジュール10から放出される光をランプ外部に放射させるための半球状の透光性カバーであり、本実施の形態では、開口側(口金側)が絞られた形状となっている。また、発光モジュール10は、このグローブ30によって覆われている。これにより、グローブ30の内面に入射した発光モジュール10の光は、グローブ30を透過してグローブ30の外部へと取り出される。
回路ユニット40は、半導体発光素子12を点灯(発光)させるために発光モジュール10に電力を供給する点灯回路(電源回路)であって、回路基板41と、当該回路基板41に実装された電子部品42、43とを有している。なお、図2では一部の電子部品にのみ符号を付している。回路ユニット40は、回路ホルダ50内に収容されており、例えば、ねじ止め、接着又は係合などにより回路ホルダ50に固定されている。
回路ホルダ50は、回路ユニット40を収納するための絶縁ケースであって、筐体60及び口金70内に収容されている。回路ホルダ50は、例えば、両側が開口した略円筒状のケースであり、筐体60と略同形の筒状の第1ホルダ部(大径部)51と口金70と略同形の筒状の第2ホルダ部(小径部)52とで構成されている。グローブ側に位置する第1ホルダ部51は筐体60内に収容されており、第1ホルダ部51には回路ユニット40の大半が収容されている。一方、口金側に位置する第2ホルダ部52は口金70内に収容されており、第2ホルダ部52には口金70が外嵌されている。これによって回路ホルダ50の口金側の開口が塞がれている。回路ホルダ50は、例えば、樹脂などの絶縁性材料で形成されていることが好ましい。
筐体60は、グローブ30と口金70との間に配置されている。筐体60は、両端が開口するケースであって、グローブ側から口金側へ向けて縮径した略円筒形状である略円錐台部材によって構成されている。
口金70は、二接点によって交流電力を受電するための受電部であり、例えば、照明器具のソケットに取り付けられる。この場合、照明用光源1が点灯された際に、口金70は、照明器具のソケットから電力を受ける。また、口金70で受電した電力は、電気配線40c、40dを介して回路ユニット40の電力入力部に入力される。
光学部材80は、発光モジュール10が発する光の進行方向を変更させるための部材であり、照明用光源1の外囲器内に配置されている。光学部材80は、発光モジュール10が設置される面によりもグローブ側に配置されていればよく、例えば、発光モジュール10とグローブ30との間に配置することができる。本実施の形態において、光学部材80は、発光モジュール10の上に固定されている。
次に、本発明の実施の形態1に係る照明用光源1において、発光モジュール10から出射する光が照明用光源1の外部に取り出されるまでの様子について、図4及び図5を用いて説明する。また、図4は、本発明の実施の形態1に係る照明用光源において、発光モジュールから出射する光が光学部材を伝搬するときの様子を説明するための図である。図5は、本発明の実施の形態1に係る照明用光源において、発光モジュールから出射する光が照明用光源の外部に取り出されるときの様子を説明するための図である。
次に、本発明の実施の形態1に係る照明用光源の配光特性について、図6及び図7を用いて説明する。図6は、本発明の実施の形態1に係る照明用光源における配光曲線図である。図7は、本発明の実施の形態1に係る照明用光源における配光曲線の配光分布を示す図である。
次に、本発明の実施の形態2に係る照明用光源について、図8、図9及び図10を用いて説明する。図8は、本発明の実施の形態2に係る照明用光源の一部切り欠き斜視図である。図9は、本発明の実施の形態に係る照明用光源の断面図である。図10は、図9において二点鎖線で囲んだ部分を示す拡大断面図である。
次に、本発明の実施の形態2に係る照明用光源2において、発光モジュール210から出射する光が照明用光源2の外部に取り出されるまでの様子について、図10を用いて説明する。
以上、本発明に係る照明用光源について、実施形態に基づいて説明したが、本発明は、これらの実施形態に限定されるものではない。以下、本発明に係る照明用光源の変形例について説明する。
例えば、上記の実施の形態において、光学部材80(280)は封止体13(213)の上に接触させて発光モジュール10(210)の上に配置したが、これに限らない。図11は、本発明の変形例1に係る照明用光源における光学部材と発光モジュールとの配置関係を示す図である。
また、上記の実施の形態において、グローブにおける光拡散性を高めるために、グローブに以下の拡散処理を施すことが好ましい。図12は、本発明の変形例2に係る照明用光源におけるグローブに施された拡散処理を説明するための図であり、ランプ軸Jを含む平面で切断した断面図である。
また、上記の実施の形態では、平面発光の発光モジュール10を用いたが、これに限らない。図13は、本発明の変形例3に係る照明用光源の一部切り欠き斜視図である。
また、上記の実施の形態において、グローブ30の全体形状を略球形とする場合(例えば、JIS C7710に規定されるG形式に準拠する形状の場合)、平面視において、発光モジュール10の発光領域の面積は、基台20の上面におけるグローブ開口内領域の面積に対して所定の値以下とすることが好ましい。
また、上記の実施の形態において、光学部材は、屈折率の異なる材料によって構成された外側部と内側部との2層構造としたが、これに限らない。単一の材料のみで光学部材を構成しても構わない。また、光学部材としては、反射板、ハーフミラー又はミラーボール等としても構わない。このような光学部材であっても、配光範囲を口金側に広げることができるので、照明用光源の配光角を拡大することができる。
また、上記の実施の形態において、発光モジュールにおける半導体発光素子は、実装基板の一方の面にのみ形成したが、これに限らない。例えば、半導体発光素子を実装する実装基台を直方体等とし、半導体発光素子を実装基台の少なくとも2つの面に実装されるように構成することができる。例えば、実装基台を立方体とし、当該実装基台の上面と4つの側面とのそれぞれに複数の半導体発光素子を実装することができる。
また、上記の実施の形態において、グローブ30の内面及び外面は、角のない滑らか曲面形状によって構成したが、これに限らない。例えば、グローブを多面体によって構成することができる。具体的には、グローブの内面もしくは外面の形状を多面体の表面形状によって構成することができる。
また、上記の実施の形態では、グローブ30と筐体60と口金70とによって外囲器が構成された筐体付き照明用光源としたが、これに限らない。例えば、一般的な白熱電球のグローブであるA形(JIS C7710)に準拠したグローブと口金とによって外囲器が構成されたクリアバルブ形照明用光源としても構わない。この場合、LEDモジュールは、当該グローブ内に中空状態で配置される。例えば、当該グローブの内方に向かって延びるように設けられたステム(支持支柱)を設け、このステム頂部にLEDモジュールを直接固定することで、フィラメントコイルのようにLEDモジュールをグローブ内で浮いた状態で配置することができる。
また、本発明は、上記の照明用光源を備える照明装置として実現することもできる。例えば、本発明に係る照明装置は、上記の照明用光源と、当該照明用光源が取り付けられる点灯器具とを備える。点灯器具は、照明用光源の消灯及び点灯を行うものであり、例えば、天井に取り付けられる器具本体と、照明用光源を覆うカバーとを備える。このうち、器具本体は、照明用光源の口金が装着されるとともに照明用光源に給電を行うソケットを有する。
10、10A、210 発光モジュール
11、211 実装基板
12、212 半導体発光素子
13、213 封止体
20、220 基台
20a、220a、257、283 貫通孔
30、30A グローブ
31、31A 膨出部
40 回路ユニット
40a、40b、40c、40d 電気配線
41 回路基板
42、43 電子部品
50、250 回路ホルダ
50a 貫通孔
51、251 第1ホルダ部
52、252 第2ホルダ部
60 筐体
60a 空間
70 口金
71 シェル部
72 絶縁部
73 アイレット部
74 絶縁リング
80、280 光学部材
81、281 外側部
82、282 内側部
214 孔部
215 舌片部
216 コネクタ
290 キャップ部材
291 第1キャップ部
292 第2キャップ部
Claims (21)
- グローブと筐体と口金とで外囲器を構成する照明用光源であって、
前記外囲器内に配置された発光モジュールを備え、
前記グローブは、前記筐体よりも外側に膨出する膨出部を有し、
当該照明用光源の中心軸を基準として-170°以上+170°以下の角度範囲内における光度は、当該照明用光源の中心軸における中心光度の1/2以上である、
照明用光源。 - -170°以上+170°以下の前記角度範囲内に低光度角度範囲が存在し、
前記低光度角度範囲では、一の角度における光度が、当該一の角度よりも絶対値が大きい角度における光度よりも小さくなっている、
請求項1に記載の照明用光源。 - 前記低光度角度範囲は、当該照明用光源の中心軸を基準として-60°~+60°である、
請求項2に記載の照明用光源。 - グローブと筐体と口金とで外囲器を構成する照明用光源であって、
前記外囲器内に配置された発光モジュールを備え、
前記グローブは、前記筐体よりも外側に膨出する膨出部を有し、
配光曲線図において、当該照明用光源の配光曲線における光度の最大値を1としたときの当該照明用光源の配光曲線で囲まれる部分の面積をS1とし、白熱電球の配光曲線における光度の最大値を1としたときの当該白熱電球の配光曲線で囲まれる部分の面積をS2とすると、
S1>0.9×S2である、
照明用光源。 - 前記外囲器内に配置された光学部材を備え、
前記光学部材は、前記発光モジュールが発する光の進行方向を変更させる、
請求項1~4のいずれか1項に記載の照明用光源。 - 前記光学部材は、前記発光モジュールが発する光を屈折させることで前記発光モジュールが発する光の進行方向を変更させるように構成されている、
請求項5に記載の照明用光源。 - 前記光学部材は、前記発光モジュールが発する光を反射させることで前記発光モジュールが発する光の進行方向を変更させるように構成されている、
請求項5又は6に記載の照明用光源。 - 前記光学部材の外表面には鏡面処理が施されている、
請求項5~7のいずれか1項に記載の照明用光源。 - 前記光学部材は、前記発光モジュールと前記グローブとの間に配置されている、
請求項5~8のいずれか1項に記載の照明用光源。 - 前記光学部材は、前記発光モジュールと離間して配置されている、
請求項9に記載の照明用光源。 - 前記光学部材の発光モジュール側の面積は、前記発光モジュールの発光領域の面積よりも大きい、
請求項10に記載の照明用光源。 - 前記光学部材は、前記発光モジュールと接触している、
請求項9に記載の照明用光源。 - 前記光学部材の発光モジュール側の面積は、前記発光モジュールの発光領域の面積よりも小さい、
請求項12に記載の照明用光源。 - 前記膨出部には、光を拡散させるための拡散処理が施されている、
請求項1~13のいずれか1項に記載の照明用光源。 - 前記発光モジュールを載置する基台を備え、
前記発光モジュールの発光領域の面積は、前記基台の上面におけるグローブ開口内領域の面積に対して8%以下である、
請求項1~14のいずれか1項に記載の照明用光源。 - 前記グローブは、ガラス又は樹脂によって構成されている、
請求項1~15のいずれか1項に記載の照明用光源。 - 前記グローブは、多面体である、
請求項1~16のいずれか1項に記載の照明用光源。 - 前記発光モジュールは、実装基板と、前記実装基板に実装された半導体発光素子とを有し、
前記半導体発光素子は、前記実装基板の上に実装されている、
請求項1~17のいずれか1項に記載の照明用光源。 - 前記発光モジュールは、実装基台と、前記実装基台に実装された半導体発光素子とを有し、
前記半導体発光素子は、前記実装基台の少なくとも2つの面に実装されている、
請求項1~18のいずれか1項に記載の照明用光源。 - 前記発光モジュール及び前記光学部材は、ランプ軸上に配置されている、
請求項1~19のいずれか1項に記載の照明用光源。 - 請求項1~20のいずれか1項に記載の照明用光源を備える、
照明装置。
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JP2018093097A (ja) * | 2016-12-06 | 2018-06-14 | 日亜化学工業株式会社 | 発光装置 |
WO2020083658A1 (en) | 2018-10-26 | 2020-04-30 | Signify Holding B.V. | A lighting device |
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