WO2012042843A1 - ランプ - Google Patents
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- Publication number
- WO2012042843A1 WO2012042843A1 PCT/JP2011/005422 JP2011005422W WO2012042843A1 WO 2012042843 A1 WO2012042843 A1 WO 2012042843A1 JP 2011005422 W JP2011005422 W JP 2011005422W WO 2012042843 A1 WO2012042843 A1 WO 2012042843A1
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- WO
- WIPO (PCT)
- Prior art keywords
- light
- guide member
- light guide
- base
- circuit unit
- Prior art date
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Classifications
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- 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
- F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
-
- 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
- F21K9/232—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 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
-
- 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
- F21K9/233—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 specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
-
- 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
- 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
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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
- 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
-
- 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
- F21V23/001—Arrangement of electric circuit elements in or on lighting devices the elements being electrical wires or cables
- F21V23/002—Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V3/00—Globes; Bowls; Cover glasses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V3/00—Globes; Bowls; Cover glasses
- F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
-
- 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 a lamp using a semiconductor light emitting element such as an LED (light emitting diode) as a light source, and more particularly to a lamp having a base and incorporating a circuit unit.
- a semiconductor light emitting element such as an LED (light emitting diode)
- Patent Document 1 discloses an LED lamp as a substitute for a general incandescent lamp.
- the LED lamp has a configuration in which an LED module having the LED as its component and a circuit unit for lighting the LED module are stored in an envelope including a glove and a base.
- the circuit unit is disposed between the LED module and the base so as not to block the light emitted from the LED module.
- the circuit unit since the circuit unit exists on the heat conduction path from the LED module to the base, the electronic components of the circuit unit may be thermally destroyed and the life of the circuit unit may be shortened. There is.
- This invention is made in view of the above subjects, and it aims at providing the lamp which can control the life fall under the influence of the heat of a circuit unit.
- a lamp according to the present invention comprises a semiconductor light emitting element, a circuit unit for emitting light from the semiconductor light emitting element, an hollow portion inside, and a light incident portion, a light incident portion, in an envelope including a base.
- a light guide member having a continuous light emitting portion, the light incident portion being held in the envelope in a state of being disposed facing the semiconductor light emitting element, and at least a part of the circuit unit It is characterized in that it is housed in the hollow portion of the member.
- the part incorporated in the light guide member in the circuit unit does not exist at least on the heat conduction path from the semiconductor light emitting element to the base.
- the lamp which can control the life fall under the influence of the heat of a circuit unit can be provided.
- FIG. 6 It is sectional drawing which shows schematic structure of the LED lamp which concerns on 1st Embodiment. It is a perspective view which shows a base, a LED module, and a light guide member among the structural members of the LED lamp shown in FIG. It is sectional drawing which shows schematic structure of the LED lamp which concerns on 2nd Embodiment.
- (A) to (d) are cross-sectional views showing a schematic configuration of an LED lamp according to a modification. It is a figure which shows schematic structure of the LED lamp which concerns on a modification. It is a figure which shows schematic structure of the LED lamp which concerns on a modification.
- (A), (b) is a figure which shows the structural member of the light guide member of the LED lamp shown in FIG. 6, (c) shows the circuit board of the same LED lamp.
- FIG. 1 It is a figure which shows schematic structure of the LED lamp which concerns on 3rd Embodiment. It is sectional drawing which shows schematic structure of the LED lamp which concerns on 4th Embodiment. It is a perspective view which shows a base, a LED module, and a light guide member among the structural members of the LED lamp shown in FIG. It is sectional drawing which shows schematic structure of the LED lamp which concerns on 5th Embodiment. It is sectional drawing which shows schematic structure of the LED lamp which concerns on 6th Embodiment. It is sectional drawing which shows schematic structure of the LED lamp which concerns on 7th Embodiment. It is sectional drawing which shows schematic structure of the LED lamp which concerns on 8th Embodiment.
- FIG. 1 is a cross-sectional view showing a schematic configuration of a bulb-shaped LED lamp 10 according to Embodiment 1
- FIG. 2 is a pedestal 30, an LED module 40, and a light guide member 56 included in the LED lamp 10. It is a perspective view of 1 member 70).
- the circuit unit 82 is not disconnected. Further, in all the drawings including FIG. 1 and FIG.
- the semiconductor light emitting element may be, for example, an LD (laser diode) or an organic light emitting element.
- the LED lamp 10 has a holder 12 made of aluminum or other metal material.
- the holder 12 is not limited to a metal material, and may be formed of a heat conductive member having good heat conductivity.
- the cross section of the holder 12 is substantially circular, and has a shape in which the small cylindrical portion 14 and the large cylindrical portion 18 are connected by the tapered cylindrical portion 16.
- the mouthpiece 20 is attached to the small cylindrical portion 14 of the holder 12.
- the base 20 conforms to, for example, the standard of E26 base specified in JIS (Japanese Industrial Standard), and is used by being attached to a socket (not shown) for a general incandescent lamp.
- the base 20 has a shell 22 also called a cylindrical body and an eyelet 24 shaped like a circular plate.
- the shell 22 and the eyelet 24 are integrated via a first insulator 26 made of a glass material.
- the integral body is fitted into the cylindrical second insulator 28.
- the second insulator 28 is formed of an insulating material having thermal conductivity, such as aluminum nitride (AlN).
- AlN aluminum nitride
- the second insulator 28 is extrapolated to the small cylindrical portion 14, and the base 20 is fixed to the small cylindrical portion 14 with a heat-resistant adhesive (not shown).
- a heat-resistant adhesive not shown.
- the pedestal 30 has a large diameter portion 30A and a small diameter portion 30B, and a stepped portion 30C is formed. As shown in FIG. 2, an inner groove 32 and an outer groove 34 are formed concentrically on the surface (surface) of the base 30 opposite to the base 20, and a through hole 36 is opened at the center. ing. (4) LED Module The LED module 40 is mounted on a surface portion (hereinafter referred to as “module mounting surface 38”) sandwiched between the inner groove 32 and the outer groove 34 of the pedestal 30.
- the LED module 40 has a wiring pattern for electrically connecting the LEDs, and a plurality of mounting substrates 42 (in this example, mounted on the mounting substrate 42 formed of an annular printed wiring board) 6) LEDs 44, 46, 48, 50, 52, 54, respectively.
- the LEDs 44,..., 54 are mounted on the mounting substrate 42 at equal angular intervals (60 degrees in this example) around the ring center axis. That is, the LEDs 44,..., 54 are arranged in an annular shape (in this example, in an annular shape).
- Each of the LEDs 44,..., 54 is a white-emitting one (white LED) comprising a blue LED chip and a yellow phosphor covering it.
- the LEDs 44 to 54 are electrically connected in series by the wiring pattern (not shown) of the mounting substrate 42.
- the shape of the mounting substrate 42 is not limited to an annular shape, and may have an arbitrary annular shape such as an oval annular shape.
- the number of LEDs 44,..., 54 is appropriately determined according to the amount of light required for the LED lamp 10.
- the light guide member 56 is provided upright on the surface of the pedestal 30.
- the light guide member 56 is made of, for example, an acrylic resin.
- the light guide member 56 is not limited to the acrylic resin, and may be formed of another light transmissive material.
- the light guide member 56 has a main body 58 and a leg 60.
- the main body portion 58 has a bottomed cylindrical shape.
- the leg portion 60 is extended from the inner periphery and the outer periphery of the annular end portion of the annular body of the main body portion 58, and includes an inner leg portion 64 and an outer leg portion 66 having an L-shaped cross section. There is.
- the inner leg portion 64 has a cutaway portion 64A which is partially cut away.
- a reflective film 68 is formed on the inner surface of the light guide member 56.
- the reflective film 68 is made of, for example, a vapor deposited film of aluminum.
- the light guide member 56 is configured by combining two members (a first member 70 and a second member 72) having a plane symmetrical shape. Shown in FIG. 2 is a first member 70.
- a support portion 74 for supporting the circuit board 84 of the circuit unit 82 is formed on the inner surface of the main body portion 58.
- the support portion 74 includes a first rib 76 and a second rib 78 protruding from the inner peripheral surface of the main body portion 58, and a support groove 80 is formed between the ribs 76 and 78.
- the first member 70 has a mating surface 70 A with the second member 72.
- FIG. 1 is a cross section cut
- the light guide member 56 has the inner leg 64 fitted in the inner groove 32 and the outer leg 66 fitted in the outer groove 34, and is attached to the pedestal 30 by an adhesive (not shown).
- the LEDs 44,..., 54 are disposed in a space 65 sandwiched by the inner leg 64 and the outer leg 66, and the light emitting surface of the LED is a main body sandwiched by the inner leg 64 and the outer leg 66 in the light guide member. It is provided facing the light-incidence part 67 of the light guide member 56 which is an opening end surface of these.
- each of the LEDs 44, ..., 54 has the light emission surface facing the light incident portion 67 of the light guide member 56 which is the opening side end surface of the main body portion 58 of the light guide member 56 It will be arranged in the circumferential direction of the part end face.
- the circuit unit 82 comprises a circuit board 84 and an electronic component 86 mounted on the circuit board 84.
- the electronic components use only the reference numeral 86, but there are electronic components other than 86, and these electronic components 86 constitute a circuit unit.
- the circuit board 84 has, for example, a disk shape, and as shown in FIG. 1, the peripheral edge portion of the circuit board 84 is inserted into and supported by the support groove 80 of the light guide member 56. That is, the entire circuit unit 82 is housed in the hollow portion of the bottomed cylindrical light guide member 56.
- the attachment method of the circuit unit 82 and the light guide member 56 may use an adhesive agent, a screw, a latching structure, etc. besides being supported by fitting.
- Globe The LED lamp 10 has a globe 96 covering the light guide member 56.
- the glove 96 is made of, for example, a translucent material such as a synthetic resin material or a glass material.
- the glove 96 is blasted, coated with silica or other fine particles, or coated with a white pigment in order to obtain a light diffusion function.
- the glove 96 itself may be formed of a milky white material.
- the glove 96 has a substantially oval shape with one end cut away, and the peripheral edge of the opening is fitted in the step portion 30 C in the large cylindrical portion 18 of the holder 12.
- a heat-resistant adhesive 98 is filled in the step portion 30C, whereby the pedestal 30 and the glove 96 are fixed to the holder 12.
- the holder 100, the base 20, and the globe 96 constitute the envelope 100, and the configuration in which the plurality of LEDs 44,..., 54 and the circuit unit 82 are stored in the envelope 100 is provided. doing.
- the LED lamp 10 is not limited to the configuration in which the base 20 is provided on the globe 96 via the holder 12.
- the envelope may be configured of only the base 20 and the glove 96, and in this case, the base 20 may be provided directly at the end of the glove 96. 2.
- Electrical connection (1) Electrical connection between the circuit unit and the cap
- the circuit unit 82 and the eyelet 24 are electrically connected by a wire 88, and the circuit unit 82 and the shell 22 are electrically connected by a wire 90.
- the circuit unit 82 converts AC power (power received from the base 20) supplied via the eyelet 24 and shell 22 and the wires 88 and 90 into power for causing the LEDs 44,..., 54 to emit light. , LEDs 44,..., 54.
- (2) Electrical connection between the circuit unit and the LED module The circuit board 84 and the mounting board 42 are electrically connected via the internal wires 92 and 94 inserted into the notch 64A (FIG. 2). (The connection portion between the internal wires 92 and 94 and the mounting substrate 42 is not shown). 3.
- the heat generated by the LEDs 44,..., 54 during lighting is conducted to the base 20 through the mounting substrate 42, the pedestal 30, and the holder 12
- the socket of the luminaire on which it is mounted the heat is dissipated to the other components of the luminaire and thus to the ceiling or wall on which it is mounted.
- the circuit unit 82 is housed in the globe 96 on the opposite side of the mounting substrate 42 to the base 20, and the circuit unit 82 is provided in the heat conduction path from the LED module 40 to the base 20. Since the configuration is not provided, there is no limitation due to the influence of heat given to the circuit unit 82, and therefore the amount of energization of the LED can be increased. Thereby, the brightness can be further improved. 4. Further, the light emitted from each of the annularly arranged LEDs 44,..., 54 is incident from the light incident portion 67 of the light guide member 56 which is the open side end surface of the light guide member 56 having a bottomed cylindrical shape.
- the inside of the light guide member 56 is repeated while reflection is repeatedly performed by the boundary surface between the light guide member 56 and the air layer (the outer peripheral surface of the light guide member 56) and the reflection film 68 formed on the inner peripheral surface of the light guide member 56. proceed. And when the incident angle with respect to the said outer peripheral surface is below a critical angle, the light according to the said incident angle is radiate
- the emitting side end face is a bottomed cylindrical hemispherical end face and a cylindrical side face.
- the light guiding member 56 If the light guiding member 56 is not provided, the light directed from the LEDs 44,..., 54 in the direction of the circuit unit 82 is blocked by the circuit unit 82. Therefore, the amount of light reaching the central axis of the glove 96 and the inner surface portion in the vicinity thereof is reduced. Although the globe 96 has a scattering function, this causes the light quantity in the direction of the central axis direction to be slightly reduced.
- the light emitted from the light guide member 56 toward the inner wall of the globe is scattered by the globe 96 and emitted from the surface of the globe 96 in various directions. As a result, light can be emitted in the circumferential direction of the LED lamp 10.
- the reflective film 68 is formed on the inner peripheral surface of the light guide member 56.
- the reflective film 68 may not necessarily be provided. Even if not provided, a part of the light traveling in the light guiding member 56 is also reflected on the inner circumferential surface thereof and directed to the light emitting side end, and the light emitted to the hollow portion of the light guiding member 56 However, this is because some of the light is re-incident from the inner circumferential surface to the light guide 56 and travels in the light guide 56.
- FIG. 3 is a cross-sectional view showing a bulb-shaped LED lamp 102 according to the second embodiment.
- the LED lamp 102 basically has the same configuration as the LED lamp 10 according to the first embodiment except that the LED constituting the LED module and the light guide member are different. Therefore, in FIG. 3, the same components as those of the LED lamp 10 are denoted by the same reference numerals, and the description thereof is omitted.
- the LEDs 106 constituting the LED module 104 according to the second embodiment are only blue LEDs, and a yellow phosphor for obtaining white light is formed on the light guide member 108. In this example, all the LEDs constituting the LED module 104 are assigned the same reference numerals. 1. While the light guide member 56 (FIG. 1) in the first embodiment has a cylindrical shape with a bottom, the light guide member 108 constituting the LED lamp 102 of the second embodiment is a cylinder whose both ends are open. It has a shape.
- a reflective film 110 is formed in the region on the base 20 side of the first rib 76 forming the support groove 80 in the inner peripheral surface of the light guide member 108.
- a yellow phosphor layer 112 which is a wavelength conversion layer is formed on the other inner peripheral surface region, outer peripheral surface region, and light emitting side end surface.
- the light is incident from the end face (the end face on the side where the base 20 is present (light incident part 111)), and the boundary surface between the light guide member 108 and the phosphor layer 112 (the outer peripheral surface of the light guide member 108) and the inner periphery of the light guide member 108
- the light travels in the light guide member 108 while repeating reflection with the reflection film 110 formed on the surface.
- blue light corresponding to the incident angle is emitted out of the light guide member 108.
- part of blue light is converted to yellow light, mixed with unconverted blue light, and turned into white light and emitted from the globe 96 to the outside of the LED lamp 102.
- the light traveling in the light guide member 108 is finally emitted from the end surface (light emitting portion) on the opposite side to the side where the base 20 exists.
- the exit side end face is an annular end face.
- a part of the light emitted from the light emitting portion is light that has repeatedly traveled in the light guide member 108, and therefore, it is formed on the central axis of the cylindrical light guide member 108. In contrast, it is emitted at an angle. As a result, light is emitted also in the direction of the central axis of the glove 96 and in the direction of the inner surface in the vicinity thereof.
- the glove 96 is temporarily compared with the case where the light guide member 108 is not provided. It is possible to suppress as much as possible the reduction in the amount of light generated in the center axial direction forward of the
- the phosphor layer 112 is formed on the light guide member 108 as in the present embodiment to cover the LEDs as in the first embodiment. Compared to the case where the phosphor is provided, the influence of heat during LED emission is less likely to occur, and a decrease in wavelength conversion efficiency of the phosphor particle can be suppressed.
- reference numerals are given to constituent members necessary to explain the difference from the respective embodiments.
- the blue LED 114 is used as the LED constituting the LED module. Then, on the outer peripheral surface of the light guide member 56, a yellow phosphor layer 116 which is a wavelength conversion layer for converting the emitted light of the blue LED 114 into yellow light is formed.
- the blue LED 114 is used as the LED constituting the LED module. Then, on the inner circumferential surface of the globe 96, a yellow phosphor layer 118 which is a wavelength conversion layer for converting the emitted light of the blue LED 114 into yellow light is formed.
- the white LED 120 is used as the LED constituting the LED module.
- the light guide member 108 is not provided with a phosphor layer.
- FIG. 5 is a view showing a modification of the support method of the circuit unit in the hollow portion of the light guide member. This example is a modification of the first embodiment (FIG. 1).
- the circuit unit 82 is supported by the light guide member 56, but in the present example, the circuit unit 82 is supported by four wires 124 (only three appear in FIG. 5).
- One end of the wire 124 is fixed to an insulating substrate portion where a wiring pattern on the circuit board 84 may be formed, and the other end is press-fitted and fixed to a mounting hole 126 formed in the pedestal 30.
- FIG. 5 shows a modification of the first embodiment
- FIGS. 6 and 7 show a modification of the installation direction of the circuit board in the hollow portion of the light guide member.
- This example is a modification of the first embodiment (FIGS. 1 and 2).
- This modification is the same as Embodiment 1 described above, except that the circuit unit and the light guide member (first member, second member) are mainly different. Therefore, in FIG. 6 and FIG. 7, the same components as in FIG. 1 and FIG. 2 will be assigned the same reference numerals, and explanations thereof will be omitted.
- the circuit board 84 according to the first embodiment is disposed in a direction crossing (orthogonal to) the central axis of the globe 96 (hereinafter referred to as “lateral arrangement”), but in the example shown in FIG. It was arranged in the following direction (hereinafter referred to as “vertical arrangement”).
- the circuit board In the horizontal arrangement, when the circuit board is relatively far from the LED, the distance from the LED of each electronic component mounted on one mounting surface does not differ greatly, but in the vertical arrangement, the circuit board The distance from the LED of each electronic component is different by an amount corresponding to the length. Therefore, in consideration of the influence of the heat of the LED, it is possible to arrange the electronic parts that are more susceptible to heat to be mounted farther away from the LED (the more heat resistant to be mounted closer to the LED).
- FIG. 7A is a perspective view of a first member 134 constituting the light guide member 132 in the LED lamp 130 according to the modification
- FIG. 7B is a perspective view of the second member 136.
- the first member 134 is provided with three pins 138, 140 and 142 in parallel from the inner circumferential surface thereof.
- bosses 144, 146 and 148, to which the tip portions of the pins 138, 140 and 142 are fitted, respectively, project from the inner peripheral surface of the second member 136.
- FIG. 7C is a plan view of the circuit board 150, in which the electronic components are not mounted.
- the circuit board 150 has through holes 152, 154 and 156 which are opened in accordance with the arrangement intervals of the pins 138, 140 and 142.
- FIG. 8A is a cross-sectional view showing a schematic configuration of the LED lamp 160 according to the third embodiment.
- the basic configuration of the LED lamp 160 is the same as that of the LED lamps 10 and 102 in the first and second embodiments, but the LED lamp 160 approximates the general shape of a HID (high intensity discharge lamp), It aims to replace the HID lamp with a light source.
- HID high intensity discharge lamp
- the LED lamp 160 has a cylindrical pedestal 162.
- the pedestal 162 is formed of a thermally conductive insulating material such as aluminum nitride (AlN).
- AlN aluminum nitride
- the shell 22 of the mouthpiece 164 is fitted in a substantially cylindrical lower cylindrical portion 164 under the pedestal 162.
- the lower cylindrical portion 164 plays the same role as the second insulator 28 (FIG. 1) of the first embodiment.
- the open end side end portion of the bottomed cylindrical globe 170 is extrapolated to the outer step portion 168 formed on the outer periphery of the upper portion of the pedestal 162.
- the globe 170 has a shape (i.e., a straight tubular shape) similar to the outer tube of the HID lamp, and is made of a translucent material such as a synthetic resin material or a glass material.
- the central axis of the globe 170 and the central axis of the base 166 substantially coincide with each other, and this central axis is taken as a lamp axis X.
- An LED module 174 is mounted on the bottom of a circular groove 172 formed at the top of the pedestal 162 as well.
- the configuration of the LED module 174 is basically the same as the LED module 40 (FIGS. 1 and 2) of the first embodiment. That is, it has a mounting substrate made of an annular printed wiring board, a plurality of blue LED chips mounted on this and electrically connected in series, and a yellow phosphor covering the LED chips in an annular shape.
- the LED lamp 160 has a cylindrical (in this example, cylindrical) light guiding member 176 provided so as to close the opening of the circular groove 172 at one end surface thereof.
- the light guide member 176 is composed of a first member 178 and a second member 180 which are semi-cylindrical.
- the first member 178 corresponds to the pins 182 and 184 protruding from the inner circumferential surface thereof
- the second member 180 corresponds to the pins 182 and 184 to the bosses 186 and 188 protruding from the inner circumferential surface.
- the circuit board 192 of the circuit unit 190 is held in the light guide member 176 by the pins 182 and 184.
- An end face 194 opposite to the LED module 174 side of the light guide member 176 is located in the direction of the lamp axis X, approximately half the entire length of the globe 170. This is because the light center in the HID lamp is generally at this position.
- the end surface 194 is formed in a tapered shape as illustrated.
- FIG. 8B is a view of the end face 194 as viewed from the lamp axis X direction.
- Reflecting films 196 are radially formed on the end face 194.
- the reflective film 196 is formed of a deposited film of aluminum or the like. 2.
- Light Path According to the LED lamp 160 configured as described above, the light emitted from the LED module 174 is the end face of the light guide member 176 having a cylindrical shape facing the LED module 174 (the end face on which the base 166 exists (light incidence Part) and travels in the light guide member 176 while repeating reflection at the interface between the light guide member 176 and the air layer.
- the incident angle with respect to the said interface is below a critical angle
- the light according to the said incident angle is radiate
- the light traveling in the light guide member 176 is finally emitted from the end surface (light emitting portion) on the opposite side to the side where the base 166 exists.
- a part of the light emitted from the light emitting portion is light that has repeatedly traveled in the light guide member 176, so the central axis of the cylindrical light guide member 176 (although the light is emitted at a certain angle (with a spread) with respect to the lamp axis X), in the present example, a reflective film 196 is provided in order to further spread the light.
- the reflection film 196 is provided in order to increase the light emitted at an angle larger than the emission angle (the angle with respect to the lamp axis X) obtained by the reflection in the light guide member 176.
- the angle formed between the reflective film 196 and the lamp axis X is appropriately set according to the required light distribution characteristic.
- the formation pattern of the reflective film is not limited to radial.
- it may be formed in a checkered pattern or in a concentric shape centered on the lamp axis X.
- the point is that some of the light traveling through the light guide member 176 has a desired direction in which the remaining part intersects the lamp axis X in the direction according to the reflection angle in the light guide member 176 (the reflective film is the lamp axis X It is acceptable if the light can be emitted from the end face 194 in the direction determined according to the angle formed.
- the fourth embodiment will be described in detail with reference to the drawings.
- the lamp according to the fourth embodiment is, for example, one having a shape and performance matched to a halogen lamp with a mirror.
- halogen lamps with reflectors are brighter than incandescent bulbs. Therefore, conventionally, it is necessary to increase the number of LEDs in order to obtain brightness equivalent to that of a halogen lamp, and this causes an increase in the amount of heat generation in the LED module. Become.
- the halogen lamp emits light from the tungsten filament over a wide range, the light emitted from the LED has high directivity. Therefore, simply providing the LED at the base of the reflecting mirror so as to emit light in the direction of the optical axis of the reflecting mirror can hardly obtain light distribution characteristics using the reflecting mirror.
- the lamp according to the fourth embodiment has a configuration that solves the above problem. 1. Configuration FIG. 9 is a cross-sectional view showing the structure of the LED lamp according to the fourth embodiment, and FIG. 10 is a perspective view showing a pedestal, an LED module, and a light guide member.
- the LED lamp 201 includes an LED module 240 having an LED, a reflecting mirror 5 for storing the LED module 240 therein, a front plate 9 at one end of the reflecting mirror 5, a circuit unit 82 for emitting light from the LED, and a circuit.
- a base 220 electrically connected to the unit 82, a pedestal 7 attached to the base 220, a light guide member 256 for guiding light emitted from the LED, and an LED module 240 are mounted.
- the tip end portion 297 (light emitting portion) of the light guiding member 256 is located at or near the focal point of the reflecting mirror 5 and serves as a light emitting portion for light guided in the light guiding member 256.
- the LED lamp 201 has an envelope constituted by a base 220, a reflecting mirror 5, and a front plate 9, and has a configuration for storing a plurality of LEDs and a circuit unit 82 in the envelope. Furthermore, the base 220 is provided to the direct reflecting mirror 5. The reflecting mirror 5 may or may not have an opening (in other words, it may be a closed system or an open system). In addition, the envelope may be configured by the base 220, the reflecting mirror 5, the front plate 9, and at least one other member. In this case, the base 220 may be provided to the reflecting mirror 5 via another member.
- Base A base 220 is provided on the base side of the reflecting mirror 5. There are various types of the base 220, and although not limited to this configuration, here, the shell 222 is an Edison type, for example, an E11 type.
- the base 220 includes a main body 81 mounted on the reflecting mirror 5 and the pedestal 7, a shell 222 mounted on the main body 81, and an eyelet 224 provided on the end of the main body 81 opposite to the reflecting mirror 5. It consists of The shell 222 is electrically connected to the circuit unit 82 via the wire 90 and the eyelet 224 via the wire 88, respectively.
- the main body portion 81 has a cavity, and the wires 88 and 90 pass through the cavity.
- the end of the hollow shell 222 side is closed with a heat conductive silicone resin or the like.
- the main body portion 81 is made of an insulating material, and includes a large diameter cylindrical portion 81a and a small diameter cylindrical portion 81b whose outer diameter is smaller than that of the large diameter cylindrical portion 81a.
- the large diameter cylindrical portion 81 a has a shape and a size corresponding to the pedestal 7 in the shape and the size of the inner diameter. Specifically, since the large diameter cylindrical portion 81a has a shape corresponding to the disk portion 47 and the cylindrical portion 49 of the pedestal 7, the cross sectional shape of the large diameter cylindrical portion 81a is stepped.
- the small diameter cylindrical portion 81 b is extended from the eyelet 224 side of the large diameter cylindrical portion 81 a.
- the large-diameter cylindrical portion 81a and the small-diameter cylindrical portion 81b have an annular cross-sectional shape, and the shell 222 has an outer peripheral surface in a screw shape and is attached to the small-diameter cylindrical portion 81b.
- the shell 222 is fixed to the small diameter cylindrical portion 81 b by an adhesive.
- the eyelet 224 has a configuration in which a wire 90 passing through the inside of the small diameter cylindrical portion 81 b is soldered.
- the pedestal The pedestal 7 is composed of a plate-like disc portion 47 having a hole for passing the wirings 88 and 90 in the center thereof and a cylindrical portion 49.
- the pedestal 7 is not limited to the above-described shape, and can have any shape.
- a base 220 is attached to the cylindrical portion 49 of the pedestal 7.
- the cylindrical portion 49 is extended from the disc portion 47.
- the center of the disc portion 47 is located on the central axis of the cylindrical portion 49, and the wires 88 and 90 extending from the base 220 are connected to the circuit unit 82 through the holes of the disc portion 47.
- a pedestal member 17 is mounted on the pedestal 7. Specifically, the base member 17 is mounted on the surface of the disc portion 47 on the circuit unit 82 side. The mounting of the base member 17 on the base 7 is performed using, for example, a screw, an adhesive, a locking structure or the like.
- the pedestal member 17 has a shape whose center coincides with the center of the disc portion 47 in design, and specifically, the pedestal 7 is in a state in which the hole of the pedestal member 17 and the hole of the disc portion 47 coincide. Will be mounted.
- the LED module 240 includes, for example, a mounting board 223 made of a printed wiring board in an annular shape, and eight LEDs 227, 229, 231, 233, and 235 mounted thereon.
- the LEDs 227,..., 241 are mounted at intervals of 45 degrees around the center axis of the ring along the center of the ring. That is, the LEDs 227,..., 241 correspond to the shape of the mounting substrate 223 and are annularly arranged.
- the LED module 240 is provided in the reflecting mirror 5 with the light emission direction directed to the side opposite to the base 220.
- Each of the LEDs 227,..., 241 is a white LED.
- the light guide member 256 has a tubular shape, and is erected on the base member 17 so that the tip end portion 297 (light emitting portion) of the light guide member 256 faces the cap 220 in the opposite direction.
- a reflection film 291 is formed on the inner surface of the light guide member 256 in order to reflect the light incident from the LED module 240 on the inner surface of the light guide member 256 and guide the light to the tip end 297.
- the light guide member 256 has a main body portion 258 and a leg portion 260.
- the main body portion 258 has, for example, a cylindrical shape closing an opening of a cylinder, and has a support groove 205 for attaching the circuit unit 82 to the light guide member 256 on the inner surface thereof.
- the shape of the support groove 205 is a groove along the inner surface of the light guide member 256.
- the tip 297 is a focal area (an area including the focal point or an area not including the focal point but located near the focal point) which is the focal point and its periphery so that the focal point of the reflecting mirror 5 exists in the distal end 297.
- the tip 297 is frosted and has a light diffusing effect.
- the shape of the tip end portion 297 is hemispherical, but other shapes such as semi-elliptic sphere may be adopted.
- the leg portion 260 is extended from the inner periphery and the outer periphery at the opposite end of the tip end portion 297, and is composed of an inner leg portion 202 and an outer leg portion 203 each having an “L” -shaped cross section.
- the end face on the opposite side of the tip end portion 297 has an annular shape, and has a shape corresponding to the arrangement of the LEDs 227,..., 241 similarly arranged in an annular shape. That is, the leg portion 260 of the light guide member 256 has a cylindrical shape that matches the arrangement of the LEDs 227,. If the arrangement of the LEDs 227,..., 241 is different, the shape of the leg 260 will change accordingly.
- the circuit unit 82 is composed of the circuit board 84 and various electronic components 86 a and 86 b mounted on the circuit board 84, and is stored in the light guide member 256. Specifically, the peripheral edge portion of the circuit board 84 is fitted into and supported by the support groove 205 of the light guide member 256.
- the circuit unit 82 and the base 220 are electrically connected by the wires 88 and 90, and the circuit unit 82 receives power from the base 220 and causes the LED module 240 to emit light.
- Base member The base member 17 mounts the light guide member 256 and the LED module 240 on the surface on the reflector opening 43 side, and is in contact with the base 7 on the opposite surface. As shown in FIG.
- the base member 17 includes an inner groove 232 and an outer groove 234 in order to fit the legs 260 of the light guide member 256.
- the light guide member 256 has the inner leg 202 fitted in the inner groove 232 and the outer leg 203 fitted in the outer groove 234, and is attached to the base member 17 by an adhesive (not shown).
- a hole for passing the wires 88 and 90 is opened.
- the reflecting mirror 5 is the same as a reflecting mirror used in a halogen lamp.
- the shape and the like of the reflecting mirror 5 is not particularly limited, but here, it has a bowl shape having an opening at one end, a smaller opening at the other end than the one end, and a reflecting surface on the inner surface. The reflecting mirror 5 is used.
- the reflecting mirror 5 is in the form of a bowl having an opening 43 at one end, and has an opening 45 in a portion corresponding to the bottom of the bowl.
- the reflecting mirror 5 is made of, for example, glass, ceramic, metal, or resin.
- the reflective surface is made of, for example, a metal film, a white resin, or a glass or resin having translucency. When the reflective surface is made of light transmitting glass or resin, leaked light can be created.
- the opening 45 side of the reflecting mirror 5 is attached to the main body 81 of the base 220 with an adhesive.
- the shape of the reflecting mirror 5 is not limited to a bowl shape, and may be, for example, a funnel shape.
- the light emitted from the LED module 240 passes through the inside of the light guide member 256 and finally exits from the opening 43 of the reflecting mirror 5.
- the reflecting surface of the reflecting mirror 5 may be a paraboloid or a spheroid.
- the reflecting surface of the reflecting mirror 5 is a paraboloid, light incident on the reflecting surface becomes parallel light.
- the reflecting surface of the reflecting mirror 5 is a spheroidal surface, it is emitted from the first focus of the reflecting mirror 5 (corresponding to the "focus” of the present invention, hereinafter simply referred to as the "focus") and the reflecting surface The light directed to is reflected to be focused to the second focal point at the reflecting surface.
- the front plate 9 is made of a translucent material and closes the opening 43 of the reflecting mirror 5. Therefore, the front plate 9 has a shape corresponding to the opening 43 of the reflecting mirror 5, specifically, a disk shape. Glass, resin, etc. can be used for the front plate.
- the mounting of the front plate 9 to the reflecting mirror 5 is not particularly limited, and for example, the mounting plate 51 is mounted.
- the mounting member 51 has, for example, an annular ring portion 53 and locking portions 55 provided at a plurality of locations of the ring portion 53, and the ring portion 53 contacts the peripheral edge portion 54 of the front plate 9.
- the front plate 9 is mounted on the reflecting mirror 5 by engaging the engaging portion 55 with the flange 59 of the opening 43 of the reflecting mirror 5.
- the provision of the front plate can prevent the fragments from falling when the light guide member 256 or the like is damaged. 2. Electrical Connection As shown in FIG. 9, the circuit unit 82 and the base 220 are connected by wires 88 and 90.
- the other ends of the wires 88 and 90 are connected to the base 220, and one end of the wires 88 and 90 is connected to the circuit unit 82.
- the LED module 240 and the circuit unit 82 are connected by the wires 92 and 94. 3. Since the LED lamp 201 has the above configuration, the heat generated in the LEDs 227,..., 241 transfers heat from the pedestal 7 to the base 20, and from the base 20 via the socket of the lighting apparatus, lighting fixtures and walls And heat is radiated to the ceiling.
- the circuit unit 82 is provided in the light guide member 256, a space for storing the circuit unit 82 between the base 7 and the base 220 is not necessary, and the LED module 240 is close to the base 220. It becomes possible to mount at a position, and the reflecting mirror 5 having a shape and a size close to a halogen bulb can be used. Thereby, the mounting
- the circuit unit 82 is provided inside the light guide member 256 and on the opposite side of the base 220, and a distance is maintained between the circuit unit 82 including electronic components sensitive to heat and the LED module 40 that generates a large amount of heat. It is a structure. With such a configuration, even if the temperature of the LED module 240 rises, the circuit unit 82 is less susceptible to the temperature rise, and the electronic components of the circuit unit 82 are less likely to be damaged by heat. As a result, the life of the LED lamp 201 can be made relatively long.
- FIG. 11 is a cross-sectional view showing a structure of the LED lamp 301 according to the fifth embodiment.
- the LED lamp 301 includes an LED module 340, a reflector 5, a pedestal 307, a front plate 9, a circuit unit 82, a base 220, and a light guide member 256.
- the LED module 340 is composed of a plurality of blue LEDs and a mounting substrate.
- a yellow phosphor layer 315 for obtaining white light from blue light emitted from the LED module 340 is formed on the surface of the tip end portion 297 (light emitting portion) which is the emitting portion of the light guide member 256 .
- the blue light emitted from the LED module 340 travels in the light guide member 256 and is emitted from the tip 297 of the light guide member 256. When emitted from the tip 297, the blue light and the yellow phosphor combine to look white. Thereafter, the light reaches the reflecting mirror 5 and the front plate 9 side.
- the LED module 340 is directly provided on the disk portion 347 which is the surface of the pedestal 307.
- the light guide member 256 is provided to stand directly on the disk portion 347 which is the surface of the pedestal 307. Specifically, a groove is provided on the surface of the pedestal 307, and the leg portion 260 of the light guide member 256 is fitted into the groove, whereby the light guide member 256 is erected on the pedestal 307.
- FIG. 12 is a cross-sectional view showing the structure of the LED lamp 401 according to the sixth embodiment.
- the LED lamp 401 includes an LED module 240, a reflecting mirror 405, a circuit unit 82, a base 420, and a light guide member 456.
- the entire light guide member 456 except for the leg portion 495 is cylindrical, and the tip portion 407 is also cylindrical, and the peripheral surface of the tip portion 407 is frosted to have a light diffusing effect.
- a reflective film 491 is formed on the inner surface of the light guide member 456.
- the light guide member 456 is erected directly on the base 420 and does not use the base 7 and the base member 17. Specifically, a groove is provided on the surface of the base and the light guide member 456 is erected on the base 420 by fitting the leg portion 495 of the light guide member 456 into the groove.
- the LED module 240 is provided directly on the base 420.
- a rod-like or columnar conductive member 470 is provided between the circuit unit 82 and the base 420 to transfer the heat of the circuit unit 82 to the base 420.
- the conductive member 470 is disposed between the circuit unit 82 and the base 420 such that one end thereof is thermally connected to the circuit unit 82 and the other end is thermally connected to the base 20. Also, resin 472 is injected into a part of the space between the inside of the base 420 and the conductive member 470.
- the conductive member is preferably made of a material having high thermal conductivity, but it is a material that conducts heat. If so, the temperature rise of the circuit unit 82 can be suppressed even a little. Therefore, an insulating glass material, a ceramic, etc. can be utilized as a conduction member.
- the conductive member 470 is not limited to a rod-like member, and may be a cylinder having a cavity inside, or may be a metal wire such as a lead wire.
- the other end of the conductive member 470 is connected to the base 420, but may be connected to another member other than the base 420, for example, a reflecting mirror.
- one end of the conductive member may be connected to a member other than the circuit board, and for example, among the electronic components mounted on the circuit board, it may be connected to the electronic component having the highest temperature.
- the front plate 9 is not provided in the opening 443 of the reflecting mirror 405, the opening 443 is in an open state, and the base 420 and the reflecting mirror 405 constitute an envelope.
- the reflecting surface of the reflecting mirror 405 is a spheroidal surface, and light incident on the reflecting surface is reflected as parallel light and emitted to the outside. 2. Since the base member 17, the pedestal 7, and the front plate 9 are not provided, the number of assembling steps can be reduced.
- FIG. 13 is a cross-sectional view showing the structure of the LED lamp 501 according to the seventh embodiment.
- the LED lamp 501 includes an LED module 240, a reflector 5, a front plate 9, a circuit unit 82, a base 520, and a light guide member 556.
- Each of the LEDs comprises a blue LED and a yellow phosphor covering the blue LED, and emits white light (white LED).
- the distal end portion 507 (light emitting portion) of the light guide member 556 has a dome shape whose outer diameter is larger than the outer diameter of the cylindrical portion 503, is frosted, and has a light diffusing effect.
- a reflective film 591 is formed on the inner surface of the light guide member 556.
- the light guide member 556 is erected directly on the base 520 and does not use the base 7 and the base member 17. Specifically, a groove is provided on the surface of the base 520, and the leg portion 595 of the light guide member 556 is fitted into the groove, whereby the light guide member 556 is erected on the base 520.
- the circuit unit 82 has electronic components mounted on the upper and lower sides of each of the two circuit boards 84a and 84b.
- the base 520 and the reflecting mirror 5 constitute an envelope. 2. Effects The light guiding member 556 is directly erected on the base 220, and the base member 17 and the pedestal 7 are not provided, so that the number of assembling steps can be reduced.
- the LED lamp 601 includes an LED module 240, a reflecting mirror 605, a base 7, a front plate 9, a circuit unit 82, a base 220, a light guiding member 256, a base member 17, and an LED module 603. .
- Each of the LEDs comprises a blue LED and a yellow phosphor covering the blue LED, and emits white light (white LED).
- the reflecting mirror 605 has a bowl shape having an opening provided with the front plate 9 at one end, and has an opening 645 at a portion corresponding to the bottom of the bowl.
- the inner circumferential surface thereof is a raised pedestal.
- the LED module 603 is arranged in a ring on a pedestal provided on the reflecting mirror 605. It is preferable that the LED module 603 be located closer to the base 220 than the end 297 which is the light emission part of the light guide member 256. Thereby, it can suppress that the LED module 603 becomes a hindrance of the light radiate
- FIG. 15 is a cross-sectional view showing a structure of an LED lamp 701 according to a ninth embodiment.
- the LED lamp 701 includes an LED module 740, a reflecting mirror 705 for storing the LED module 740 therein, and a columnar light guiding member 756 for guiding light emitted from the LED module 740 to a focal area of the reflecting mirror 705.
- a front plate 9 provided on the opening side of the reflecting mirror 705, a circuit unit 82 for emitting light from the LED, and a base 720 electrically connected to the circuit unit 82.
- the circuit unit 82 is a light guide member. It is accommodated in the hollow part 756a of the inside of 756. Further, the tip end portion 762 (light emitting portion) of the light guide member 756 is located at or near the focal point of the reflecting mirror 5.
- Base A base 720 is attached to one end of the projecting portion 731 of the reflecting mirror 705 and one end of the light guide member 756 so as to close the opening of the projecting portion 731 of the reflecting mirror 705.
- the attachment of the base 720 to the reflecting mirror 705 can be performed by, for example, a screw, an adhesive, a locking structure, or the like, and is fixed by an adhesive here.
- the base 720 includes a base body 783 mounted on the reflecting mirror 705 and the light guide member 756, a shell 722 mounted on the base body 783, and an eyelet 724 provided on one end of the base body 783.
- the mouthpiece main body 783 is composed of a large diameter cylindrical portion 797 and a small diameter cylindrical portion 799 whose outer diameter is smaller than that of the large diameter cylindrical portion 797.
- An inclined portion 701 is provided between the large diameter cylindrical portion 797 and the small diameter cylindrical portion 799.
- the small diameter cylindrical portion 799 extends from the eyelet 724 side of the large diameter cylindrical portion 797.
- the large diameter cylindrical portion 797 and the small diameter cylindrical portion 799 have an annular cross-sectional shape.
- the mouthpiece main body 783 is further recessed from substantially the center of the first recessed portion 704 to one end side from the first recessed portion 704 recessed stepwise from the large diameter cylindrical portion 797 side to the small diameter cylindrical portion 799 side. And a second recessed portion 703.
- the shape (plan view shape) of the first recessed portion 704 matches the external shape (the outer periphery shape in plan view) of the LED module 740.
- the LED module 740 is mounted on the base body 783 with the LED module 740 fitted to the first recessed portion 704.
- the mounting of the LED module 740 to the first recessed portion 703 can be performed by, for example, a screw, an adhesive, a locking structure or the like, and is fixed by an adhesive here.
- the configurations of the shell 722 and the eyelet 724 are the same as the shell and the eyelet in the fourth embodiment and the like.
- the LED module 740 includes a mounting substrate 721, a plurality of LEDs 723 mounted on the surface of the mounting substrate 721, and a sealing body 725 covering the plurality of LEDs 723 on the mounting substrate 721.
- the mounting substrate 721 is an insulating plate, and here, the shape in plan view (the shape in plan view) is circular. Further, through holes 707 and 709 for passing a wire connecting the base 720 and the circuit unit 82, and electrode pads 715 and 717 connecting the base 720 and the LED 723 are formed in the mounting substrate 721.
- the sealing body 725 is mainly made of a translucent material, and when it is necessary to convert the wavelength of light emitted from the LED 723 to a predetermined wavelength, the wavelength conversion material for converting the wavelength of light is translucent Mixed with the sex material.
- silicone resin can be used as the translucent material
- phosphor particles can be used as the wavelength conversion material.
- the LED 723 uses blue light as a light emission color, and phosphor particles that convert blue light to yellow light are used as a wavelength conversion material. As a result, the blue light emitted from the LED 723 and the yellow light wavelength-converted by the phosphor particles are mixed, and white light is emitted from the LED module 740 (LED lamp 701).
- the center of the light emitting portion composed of the plurality of LEDs 723 is located on the optical axis 727 of the reflecting mirror 705.
- Light guiding member The light guiding member 756 has the hollow portion 756a inside as described above, has the main portion 741 and the leg 743, and the main portion 741 extends from the bottom of the reflecting mirror 705 , And is provided in the reflecting mirror 705.
- FIG. 16 is an exploded perspective view of the light guide member 756, the LED module 740, and the base 720.
- the main body portion 741 has a columnar shape (in this example, a cylindrical shape) having a hollow portion 756a, and both ends thereof are closed.
- a leg 743 is extended from one end surface of the main body 741 (an end surface located on the base 720 side).
- the other end (also referred to as a tip) of the main body 741 is hemispherical.
- the leg 743 has a cylindrical shape.
- the hollow portion 756a has a space shape in which a hemisphere and a cone are connected to both ends of a cylinder, and the hemisphere side is located on the other end side.
- the LED module 740 is disposed inside the cylindrical leg portion 743 in a state of facing the one end surface 761 (light incident portion) of the main body portion 741, and the circuit unit 82 is stored in the hollow portion 756a. Further, in the portion of the main body 741 between the hollow portion 756a and the one end face 761 of the main body 741, communication holes 745 and 747 for communicating the hollow 756a with the inside of the leg 743 are formed. ing. Wirings 788 and 789 pass through the connection holes 745 and 747, and the circuit unit 82 and the LED module 740 are electrically connected, and the circuit unit 82 and the cap 720 are electrically connected, respectively.
- the light guide member 756 is configured by combining two members (a first member 749 and a second member 751) in a plane symmetrical shape.
- the second member 751 does not appear to be positioned in front of the cross section in FIG. 15, and in FIG. 16, the first member 749 and the second member 751 are shown so that the inside of the light guide member 756 can be seen. , And only the first member 749 appears in FIG.
- the first member 749 and the second member 751, as described above, have the same configuration because they are plane-symmetrical to each other, and the configuration of reference numerals used to describe the first member 749 is The same applies to the two members 751.
- the first and second members 749 and 751 have a first recessed portion 753 forming a hollow portion 756a at the other end, and a second recessed portion 755 forming a cylindrical leg 743 at one end. It is formed. Continuous grooves 757 and 759 for the wires 788 and 789 are formed between the first recessed portion 753 and the second recessed portion 755 in the first and second members 749 and 751, respectively.
- the light guide member 756 that has a generally columnar shape is obtained.
- one end face of the light guide member 756 (one end face of the main body 741 and having a circular end face) is a light emission of the LED module 740. It faces the part (the sealing body 725 in which the LED is disposed).
- the light emitted from the LED module 740 enters the light guide member 756 from one end surface of the main body 741 of the light guide member 756. Therefore, the end face 761 of the main body 741 serves as a light incident portion into the light guide member 756.
- the tip end portion 762 which is the other end of the light guide member 756 is subjected to diffusion processing, for example, frost processing, and light traveling inside the light guide member 756 is emitted in the diffusion state from the other end. That is, the light becomes a light emitting portion which is emitted from the tip portion 762 in all directions.
- the circuit unit 82 includes a circuit board 84 and various electronic components 86 a and 86 b mounted on the circuit board 84. Storage in the light guide member 756 of the circuit unit 82 is performed, for example, by attaching the circuit board 84 to the end face on one end side of the hollow portion 756 a of the light guide member 756.
- the circuit board 84 is fixed to the light guide member 756 by an adhesive.
- the reflecting mirror 705 has a funnel-like overall shape, and a conical main body 729 forming a part of the funnel, and a cylindrical projecting part 731 forming a part of the funnel. Equipped with That is, it has a funnel shape having an opening at one end (here, the end opposite to the base 720), an opening narrower at the other end than at the other end, and a reflecting surface on the inner surface There is.
- the intersecting portion and its periphery are the main body The bottom of 729 or the base of the reflecting mirror 705.
- the opening 733 of the main body 729 is also the opening 733 of the reflecting mirror 705.
- the protrusion 731 has a cylindrical shape whose cross-sectional shape is, for example, a circular shape, and protrudes outward from the bottom of the main body 729.
- One end of a light guide member 756 is inserted and mounted in the through hole 737 provided in the protrusion 731.
- the leg 743 side of the main body 741 and the leg 743 are inserted into the through hole 737 of the reflecting mirror 705 and attached to the reflecting mirror 705 by an adhesive (not shown) It is done.
- a base 720 is attached to the outer end of the projecting portion 731.
- the front plate 9 has the same configuration as that used in the fourth embodiment and the like. 2.
- connection between Circuit Unit and Base The circuit unit 82 and the base 720 are connected by the wires 790 and 791 as described above.
- the wires 790 and 791 are, as shown in FIG. 15, the inside of the die body 783 (the second recessed portion 705 and the first recessed portion 703), the through holes 707 and 709 of the mounting substrate 721 of the LED module 740 (FIG. 16). Reference), through the interior of the leg 743 of the light guide 756 and through the contact holes 745, 747 of the body 741 of the light guide 756;
- wires 790 and 791 can be derived from the mounting substrate 721 of the LED module 740 to the second recessed portion 704.
- the circuit unit 82 and the LED module 740 are connected by the wires 788, 789.
- the wires 788 and 789 pass through the inside of the leg portion 743 of the light guide member 756 and the communication holes 745 and 747 of the main body portion 741 of the light guide member 756, as shown in FIG.
- connection between the wires 788 and 789 and the circuit unit 82 is made by soldering (not shown).
- the wires 788 and 789 pass through the contact holes 745 and 747 together with the wires 790 and 791, although they do not appear in FIGS.
- the base 720 and the LED 723 are connected via electrode pads 715 and 717.
- the connection between the wires 788 and 789 and the LED module 740 and the connection between the wires 788 and 789 and the circuit unit 82 are made by soldering (not shown). 3.
- the heat generated in the LED 723 at the time of lighting is transferred to the base 720 as in the fourth embodiment and the like, and the main body of the lighting fixture or the like Heat is dissipated to walls and ceilings. 4.
- the LED module 740 is disposed in the space formed by the base body 783 of the base 720, the leg portion 743 of the light guide member 756, and the end surface 761 of the body portion 741 of the light guide member 756.
- the light emitting surface (the surface of the sealing body 725) of the LED 723 of the LED module 740 faces the end surface 761 of the main body 741 of the light guiding member 756. That is, the end face 761 of the main body 741 of the light guide member 756 is a light incident part emitted from the LED module 740.
- the light emitted from the LED module 740 is incident from the end face 761 of the light guide member 756. Thereafter, the light is reflected between the boundary surface between the light guide member 756 and the air layer (the outer peripheral surface of the light guide member 756) or between the outer peripheral surface of the light guide member 756 and the inner peripheral surface constituting the hollow portion 756a. Advance in the light guide member 756. And when the incident angle with respect to the said outer peripheral surface is below a critical angle, the light according to the said incident angle is radiate
- part of the light traveling in the light guide member 756 passes near the circuit unit 82 housed in the hollow portion 756a, and exits from the tip end portion 762 of the other end opposite to the end face 761. Be done.
- the hollow portion 756a in the central axis direction be located closer to the end 762 than the end face 761 as in the example shown in FIG. This is because the circuit unit 82 can be moved away from the LED module 740 and can be less affected by heat at the time of lighting.
- a tip 762 (light emitting portion) at the tip of the light guide member 756 is on the focal position of the reflecting mirror 705. That is, the center of the hemisphere which is the shape of the tip of the light guide member 756 coincides with the design of the focal point of the reflecting mirror 705.
- the light output toward the opening 733 side of the reflecting mirror 705, that is, the front plate 9 is transmitted through the front plate 9 to be an LED lamp It is output from 701 to the outside.
- light output toward the reflecting surface 735 of the reflecting mirror 705 is reflected by the reflecting surface 735 toward the front plate 9, and then transmitted through the front plate 9 and output from the LED lamp 701 to the outside. . 5.
- the hollow portion 756a is located on the opposite side of the base 720 with respect to the LED module 740, there is no need to store the circuit unit 82 between the LED module 740 and the base 720.
- the distance to 720 can be reduced, and the amount of heat conducted from the LED module 740 to the base 720 can be increased.
- the circuit unit 82 by arranging the circuit unit 82 inside the reflecting mirror 705, it is not necessary to secure a space for the circuit unit 82 between the LED module 740 and the base 720, and the other end side of the reflecting mirror 705 or
- the base body 783 of the base 720 can be miniaturized. Under the present circumstances, although there exists a possibility that a temperature rise may arise in the nozzle
- FIG. 17 is a cross-sectional view showing the structure of the LED lamp 801 according to the tenth embodiment.
- the LED lamp 801 includes an LED module 840, a reflecting mirror 705, a light guide member 856, a front plate 9, a circuit unit 82, and a base 720.
- the LED module 840 includes a mounting substrate 721, an LED 823 and a sealing body 809.
- the LED 823 emits blue light
- the sealing body 809 does not contain a wavelength conversion material. That is, the sealing body 809 is made of a translucent material, and the LED module 840 emits blue light.
- the attachment of the LED module 840 to the base 720 is the same as that of the ninth embodiment.
- the light guide member 856 has the same basic configuration as the light guide member 756 according to the ninth embodiment, but a reflective film 813 is formed on the inner surface of the hollow portion 856a inside, and the light guide A reflective film 819 is formed on the peripheral surface 817 excluding the hemispherical portion (815) of the tip of the member 856 which is exposed in the reflecting mirror 705. Saw-tooth shaped unevenness is formed on the surface of the emitting portion 815.
- a phosphor layer 822 is formed on the surface of the light emitting portion 815 of the light guide member 856.
- the phosphor layer 822 is a wavelength conversion member (here, phosphor particles) for converting light (here, blue light) emitted from the LED module 840 into a predetermined light color (here, yellow light). It consists of
- a reflection film 826 for reflecting light emitted from the LED module 840 toward the end surface 824 of the light guide member 856 is formed on the inner peripheral surface (except for the end surface 824) of the leg portion 821 of the light guide member 856 There is.
- the end face 824 of the light guide member 856 is a light incident part. .
- the phosphor layer 822 for converting blue light emitted from the LED module 840 into yellow light is formed in the light emitting portion 815 of the light guiding member 856. It may be formed on the end face 824 or may be formed on the back surface of the front plate 9. Furthermore, the wavelength conversion member may be mixed in the material constituting the front plate, for example, a resin material or a ceramic material. 2.
- the LED lamp 801 when blue light is emitted from the LED module 840 and then enters the light guide member 856 and emitted from the emission unit 815, a part of the blue light is converted to yellow light and the light guide member 856 As a result, the blue light emitted as it is and the yellow light wavelength-converted by the phosphor layer 822 are mixed, and as a result, the LED lamp 801 outputs white light.
- the front plate 9 is attached to the reflecting mirror, but when the light emitted from the light-emitting portion of the light guide member has a desired light color, an open type in which the front plate is not provided The lamp may be used.
- the shape of the light guide member is not limited to the shape of the light guide member described in the ninth and tenth embodiments, and may be another shape.
- FIG. 18 is a cross-sectional view showing a structure of an LED lamp 901 according to an eleventh embodiment.
- the LED lamp 901 includes an LED module 940, a reflecting mirror 905, a light guide member 956, a circuit unit 982, and a cap 920.
- the LED module 940 includes a mounting substrate 913, a plurality of LEDs 915, and a sealing body 917.
- the LED 915 emits blue light as in the ninth embodiment and the like, and phosphor particles for yellow light are mixed in the sealing body 917.
- the reflecting mirror 905 has a concave reflecting surface on the inside, and the entire shape is a funnel-like shape.
- the reflecting mirror 905 has a cylindrical protrusion 921 in addition to the main body 919 as in the ninth embodiment.
- the protrusion 921 has a through hole.
- the diameter of the through holes increases in stages (here, three steps) as moving from the end on the main body 919 side to the end on the base 920 side.
- the cross-sectional shape of the through hole is circular, but may be another shape such as a polygonal shape.
- the first hole 923 located on the side of the main body 919 is provided with the support 925 of the light guide member 956 and the portion of the sealing body 917 of the LED module 940.
- the mounting substrate 913 of the LED module 940 is disposed in the second hole 927 adjacent to and larger than the hole diameter of the first hole 923.
- the large diameter cylindrical portion 931 of the mouthpiece 920 is inserted into the third hole 929 located on the mouthpiece 920 side and adjacent to the second hole 927.
- the length in the central axis direction of the through hole of the second hole 927 corresponds to the thickness of the mounting substrate 913 of the LED module 940, and the mounting substrate 913 fits into the second hole 927.
- the base 920 is attached to the reflecting mirror 905, whereby the positioning and fixing (attachment) of the LED module 940 are performed.
- the base 920 comprises a base body 947, a shell 922 and an eyelet 924.
- the base body 947 has a large diameter cylindrical portion 931 internally fitted in the first hole 929 of the projecting portion 921 of the reflecting mirror 905, a small diameter cylindrical portion 953 provided with the shell 922 and the eyelet 924, a large diameter cylindrical portion 931 and a small diameter And an inclined portion 955 between the cylindrical portion 953 and the cylindrical portion 953.
- the light guide member 956 is, as described above, the support portion 925 partially inserted into the first hole portion 923 of the reflecting mirror 905, and one end of the support portion 925 (the end opposite to the base 920 And a part of the circuit unit 982 is accommodated in the hollow part 956a of the bulging part 937.
- the support portion 925 has a circular sectional shape corresponding to the sectional shape of the first hole 923 of the reflecting mirror 905. In other words, it has a cylindrical shape.
- the supporting portion 925 has such a length that it reaches halfway through the length in the central axis direction of the through hole of the first hole 923, and the remaining portion of the length in the central axis of the through hole of the first hole 923
- the sealing body 917 of the LED module 940 is located and stored. Further, an end face 926 of the support portion 925 is a light incident portion.
- the bulging portion 937 bulges in a substantially spherical shape from a portion corresponding to the bottom of the main body 919 of the reflecting mirror 905 in the direction (opening side) perpendicular to the direction perpendicular to the optical axis of the reflecting mirror 905.
- the center of the substantially spherical bulging portion 937 coincides with the focal point of the reflecting mirror 905 in design.
- the bulging portion 937 diffusion processing is performed.
- diffusion particles are mixed in a region corresponding to the bulging portion 937 of the light guide member 956, and the light traveling in the bulging portion 937 by the diffusion particles The light is emitted from the bulging portion 937 in an irregular direction. Therefore, the bulging portion 937 here is a light emitting portion.
- the light output from the reflecting mirror 905 is parallel light when the reflecting surface is a parabolic curved surface as in the fourth embodiment.
- the reflective surface is an elliptical surface, the light is collected.
- the bulging portion 937 when the column portion 335 is inserted into the first hole 923 of the reflecting mirror 905, the bulging portion 937 abuts on the main body portion 919 of the reflecting mirror 905 to insert the column portion 335. regulate.
- the hollow portion 956a provided in the light guide member 956 has a hemispherical shape corresponding to the external shape of the spherical bulging portion 937, and the circuit board 984 of the circuit unit 982 is attached to a flat portion located on one end side, Some electronic components 986 and the like that constitute the circuit unit 982 are mounted on the circuit board 984.
- the electronic components 986 and the like are components having a heat-resistant temperature lower than the temperature of the LED module 940 at the time of lighting and its surrounding temperature, and are, for example, an electrolytic capacitor and the like.
- the electronic component 986 having low heat resistance is stored in the hollow portion 956a of the light guide member 956, and the electronic component 986b having high heat resistance is a metal cap 920. It is stored in the inside 944 of the large diameter cylindrical portion 931.
- the heat-resistant electronic component 986 b for example, there is a choke coil, and here, the electronic component 986 b is mounted on the back surface (the main surface on the base 920 side) of the mounting substrate 913 of the LED module 940. 3.
- the number of electronic components increases as a light control lighting circuit unit, and the light guide member is miniaturized, and all the electronic components and the like constituting the circuit unit are not contained in the hollow portion. Even in such a case, it is possible to cope by dividing the space for storing the electronic components 986 and 986 b.
- the Twelfth Embodiment In the ninth to eleventh embodiments, no heat countermeasure is taken for the circuit unit 82, 982. However, a heat countermeasure may be taken for the circuit unit as well, and the heat countermeasure for the circuit unit 82, 982 is taken The second embodiment will be described below as a twelfth embodiment.
- FIG. 19 is a cross-sectional view showing a structure of an LED lamp 1001 according to a twelfth embodiment.
- the LED lamp 1001 includes an LED module 1040, a reflecting mirror 705 for housing the LED module 1040 therein, and a light emitted from the LED module 1040 including or near the focal point of the reflecting mirror 705.
- a light guide member 1056 for guiding light to the region, a front plate 9 provided on the opening side of the reflecting mirror 705, a circuit unit 82 for emitting light from the LED, and a base electrically connected to the circuit unit 82 1020 and a conductive member 1070 for transferring the heat of the circuit unit 82 to the base 1020.
- the LED module 1040 includes an annular mounting substrate 1011 having a through hole 1010 at the center, a plurality of LEDs 1013 mounted on the mounting substrate 1011, and a sealing body 1015 for sealing the respective LEDs 1013.
- the plurality of LEDs 1013 are mounted at equal intervals in the circumferential direction of the mounting substrate 1011, for example.
- the light guide member 1056 has a through hole 1017 for communicating the hollow portion 1056a for storing the circuit unit 82 with the entrance surface 1061 (the light incident portion side external side), in the ninth embodiment. It differs from the light guide member 756.
- the through holes 1017 and the through holes 1010 of the mounting substrate 1011 are formed along the optical axis (also the central axis of the LED lamp 1001, the reflecting mirror 705, the light guide member 1056 and the base 1020) 727.
- the conductive member 1070 is disposed in this space.
- the base 1020 includes a base body 1019, a shell 1022 and an eyelet 1024, as in the ninth embodiment.
- the base body 1019 has a large diameter cylindrical portion 1021, a small diameter portion 1023 and an inclined portion 1025, and the LED module 1040 is mounted on the end surface of the large diameter cylindrical portion 1021 opposite to the small diameter portion 1023.
- the small diameter portion 1023 is an end face on the large diameter cylindrical portion 1021 side and has a recess 1027 in a portion through which the optical axis 727 passes, and a through hole 1029 for wiring 1090 and 1091 connecting the base 1020 and the circuit unit 82, It has 1031.
- the conductive member 1070 is a material having high thermal conductivity, such as a metal material, and is constituted by the rod body 1033.
- One end of the rod 1033 is fixed by the adhesive 1037 while being inserted into the recess 1027 of the small diameter portion 1023 of the die 1020, and the other end is fixed by the adhesive 1035 in a state in contact with the circuit board 84 of the circuit unit 82. It is done. 2. Effects With the configuration described above, the heat stored in the circuit unit 82 can be conducted from the rod body 1033 which is the conductive member 1070 to the base 1020, and the temperature rise of the circuit unit 82 can be suppressed.
- the inside of the spinneret is hollow, but for example, an insulating material having a conductivity higher than that of air may be filled.
- an insulating material having a conductivity higher than that of air
- the heat from the LED module at the time of light emission can be transmitted to the lighting apparatus through the base and the socket, and the heat dissipation characteristics of the entire lamp can be improved.
- said material there exist silicone resin etc., for example.
- the mounting substrate may be an existing mounting substrate such as a resin substrate, a ceramic substrate, or a metal base substrate including a resin plate and a metal plate.
- LEDs of other luminescent colors may be used. In that case, it is necessary to use a wavelength conversion material that converts the light color required for the LED lamp.
- white light is output from the LED module (LED lamp) using one type of LED, but for example, three types of LEDs of blue light emission, red light emission, and green light emission are used. These light emitting colors may be mixed to form white light. It may be a combination of a near ultraviolet LED and a mixed-color phosphor formed by mixing a red phosphor, a blue phosphor, and a green phosphor.
- the LED module may be configured using a plurality of SMDs (Surface Mount Devices).
- the number of LEDs is not limited to the number used in the embodiment and the like, and can be appropriately changed according to the required luminance and the like.
- the sealed body covers all the LEDs mounted on the mounting substrate.
- one sealed body is used for one LED.
- a plurality of LEDs may be grouped, and a predetermined number of LEDs may be coated with one sealing body.
- phosphor particles are mixed in the translucent material, but for example, a phosphor layer containing phosphor particles may be formed on the surface of the translucent material.
- a wavelength conversion member such as a fluorescent plate including phosphor particles in the light emission direction of the LED may be provided.
- the LEDs are arranged in an annular shape, but the arrangement form is not limited to this. For example, they may be arranged in an elliptical ring, a square ring, or a polygonal ring. 3.
- phosphor particles for converting the wavelength of light emitted from the LED are included in the sealing body, or a phosphor layer containing the phosphor particles is formed in the light emitting portion of the light guide member.
- a phosphor layer may be formed on the back surface of the front plate in the eighth and ninth embodiments, and light emitted from the LED module is incident on the light guide member.
- a phosphor layer may be formed on the surface.
- a wavelength conversion plate or the like containing a wavelength conversion material may be disposed between the incident surface of the light guide member and the LED module.
- Light guide member (1) whole composition According to arrangement to LED of a mounting board, shape of a light guide member is made into an elliptical cylinder shape, a square cylinder shape, and a cylindrical shape of a polygon. That is, the shape of the light guide member (the shape on the one end face) is matched to the array shape of the LEDs in order to allow the light emitted from the annularly arranged LEDs to be incident from one end surface of the cylindrical light guide member. It shall be.
- the light guide member can be provided upright on the surface of the base member, the base, the base or the like.
- the light guide member whose tip is hemispherical or spherical is used, but it is not limited to this, truncated tetrahedron, truncated hexahedron, truncated octahedron, cut Apical dodecahedron, truncated icosahedron, rhombic octahedron, rhombic twenty or dodecahedron, rhombic truncated cubic octahedron, rhombic truncated twenty or dodecahedron, deformed cube and deformed decahedron It may be a semiregular polyhedron other than an orthorhombic octahedron such as a dihedron.
- a polyhedron such as a regular tetrahedron, a regular hexahedron, a regular octahedron, a regular dodecahedron, and a regular icosahedron.
- a polyhedron is a cuboctahedron, a decahedron, a dodecahedron, a dodecahedron, a decahedron, a didecahedron, a small double triangle, or a dodecahedron, a double triangle, or a twelve triangle.
- It may be a quasi-regular polyhedron such as a face, a large double triangle, or a dodecahedron, a tetrahedron, an octahedron, a cubic hemioctahedron, and a icosahedron.
- the shape of the tip portion of the light guide member is a small cubic cubic octahedron, a large cubic cubic octahedron, a cubic truncated cubic octahedron, a uniform large orthorhombic octahedron, a small orthohexahedron, an important cubic octahedron , Large oblique hexahedron, small twenty or twenty or dodecahedron, small deformation twenty or twenty or dodecahedron, small twelve or twenty or dodecahedron, truncated dodecahedron, oblique ten Dihedral or dodecahedron, truncated icosahedron, small star-shaped truncated dodecahedron, large star-shaped truncated dodecahedron, large star-shaped
- circuit board of the circuit unit is disposed in a posture in which the main surface is orthogonal to the lamp axis, but in the posture in which the main surface is parallel to the lamp axis It may be disposed, or may be disposed in an inclined attitude with respect to the lamp axis.
- the arrangement of the electronic components mounted on the circuit board is not particularly described, but a large (volume, height, etc.) electronic component is provided at the central portion of the circuit board.
- two circuit units may be configured by dividing the plurality of electronic components that constitute the circuit unit into relatively heat-sensitive components and strong components. Then, a circuit unit composed of an electronic component weak to heat is housed in the hollow portion as in the above embodiment, and a circuit unit composed of an electronic component resistant to heat is housed inside a base. By doing this, it is possible to miniaturize the light guide member and hence to miniaturize the entire lamp.
- the circuit unit is housed in the hollow portion as it is, but may be housed in the hollow portion in a state of being housed in a case (circuit case).
- the tall electronic components are placed on the central portion (inner side) of the annular circuit board.
- the circuit unit can be disposed on the more proximal side of the reflecting mirror. As the circuit unit is moved closer to the base side of the reflecting mirror, the amount of light blocked by the circuit unit in the light traveling from the light emitting portion of the light guide member to the reflecting surface of the reflecting mirror can be reduced. It is possible to obtain a light distribution characteristic using a mirror more.
- the conductive member is preferably made of a material having good thermal conductivity. The shape thereof may be an elliptic cylinder, a square cylinder, a polygonal cylinder, or the like. Moreover, it is preferable to secure insulation so that electricity does not flow between the circuit unit and the base via the conductive member.
- the present invention can be used to miniaturize the lamp and to improve the brightness.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
- Led Device Packages (AREA)
- Planar Illumination Modules (AREA)
Abstract
Description
図1は、実施の形態1に係る電球形のLEDランプ10の概略構成を示す断面図であり、図2は、LEDランプ10に含まれる台座30、LEDモジュール40、および導光部材56(第1部材70)の斜視図である。なお、図1において、回路ユニット82は切断していない。また、図1、図2を含む全ての図において各部材間の縮尺は統一していない。
1.構成
(1)ホルダ
図1に示すように、LEDランプ10はアルミニウムその他の金属材料からなるホルダ12を有する。なお、ホルダ12は金属材料に限らず、その他熱伝導性の良好な熱伝導部材で形成しても構わない。ホルダ12の横断面は略円形をしており、小円筒部14と大円筒部18とをテーパ筒部16で連結したような形状をしている。
(2)口金
ホルダ12の小円筒部14には、口金20が取り付けられている。口金20は、JIS(日本工業規格)に規定する、例えば、E26口金の規格に適合するものであり、一般白熱電球用のソケット(不図示)に装着して使用される。
(3)台座
ホルダ12の大円筒部18には、全体的に円板状をした台座30が嵌め込まれている。台座30は、アルミニウムその他の金属材料で形成されている。
(4)LEDモジュール
台座30の内溝32と外溝34とで挟まれた表面部分(以下、「モジュール搭載面38」と言う。)には、LEDモジュール40が搭載されている。
(5)導光部材
台座30の表面には、導光部材56が立設されている。導光部材56は、例えば、アクリル樹脂からなる。なお、導光部材56は、アクリル樹脂に限らず、その他の透光性材料で形成しても構わない。導光部材56は、本体部58と脚部60とを有する。
(7)回路ユニット
回路ユニット82は、回路基板84と回路基板84に実装された電子部品86とからなる。電子部品は、便宜上、86の符号だけを用いているが、電子部品は86以外にもあり、これらの電子部品86により回路ユニットが構成される。
(8)グローブ
LEDランプ10は、導光部材56を覆うグローブ96を有している。グローブ96は、例えば、合成樹脂材料やガラス材料などの透光性材料からなる。なお、グローブ96は、光拡散機能を得るためブラスト処理、シリカその他の微粒子のふきつけ塗装、または白色顔料の塗布塗装がなされている。あるいは、グローブ96自体を乳白色の材料で形成しても構わない。
2.電気的接続
(1)回路ユニットと口金との電気的接続
回路ユニット82とアイレット24とは配線88で、回路ユニット82とシェル22とは配線90でそれぞれ電気的に接続されている。回路ユニット82は、アイレット24およびシェル22並びに配線88および配線90を介して供給される交流電力(口金20から受電される電力)を、LED44,…,54を発光させるための電力に変換して、LED44,…,54に給電する。
(2)回路ユニットとLEDモジュールとの電気的接続
回路基板84と実装基板42とは、切欠き部64A(図2)に挿通された内部配線92,94を介して電気的に接続されている(内部配線92,94と実装基板42との接続部分は不図示)。
3.放熱経路
上記の構成からなるLEDランプ10によれば、点灯中にLED44,…,54で発生する熱は、実装基板42、台座30、ホルダ12を介して口金20へと伝導され、LEDランプ10が装着されている照明器具のソケットを経由して、当該照明器具の他の構成部材、ひいてはこれが取り付けられている例えば天井や壁へと放熱される。
4.光路
また、環状に配されたLED44,…,54の各々から出射された光は、有底筒状をした導光部材56の開放側端面である導光部材56の光入射部67から入射され、導光部材56と空気層との境界面(導光部材56の外周面)と導光部材56の内周面に形成された反射膜68とで反射を繰り返しながら、導光部材56内を進行する。そして、前記外周面に対する入射角が臨界角以下の場合に、当該入射角に応じた分の光が導光部材56外へと出射される。
<第2の実施の形態>
図3は、実施の形態2に係る電球形のLEDランプ102を示す断面図である。
1.構成
実施の形態1における導光部材56(図1)が有底筒状をしていたのに対し、実施の形態2のLEDランプ102を構成する導光部材108は、両端が開放された円筒状をしている。
2.光路
上記の構成からなるLEDランプ102によれば、環状に配された6個のLED106の各々から出射された青色光は、円筒状をした導光部材108のLED106の光の出射部に対向する端面(口金20の存する側の端面(光入射部111))から入射され、導光部材108と蛍光体層112との境界面(導光部材108の外周面)と導光部材108の内周面に形成された反射膜110とで反射を繰り返しながら、導光部材108内を進行する。そして、前記外周面に対する入射角が臨界角以下の場合に、当該入射角に応じた分の青色光が導光部材108外へと出射される。このとき、蛍光体層112を通過する間に青色光の一部は黄色光に変換され、変換されなかった青色光と混色されて白色光となってグローブ96からLEDランプ102外へと出射される。
<第1及び第2の実施の形態に係る変形例>
図4(a)、図4(b)に実施の形態1の変形例を、図4(c)、図4(d)に実施の形態2の変形例をそれぞれ示す。なお、図4においては、専ら各実施の形態との違いを説明するのに必要な構成部材に符号を付すこととする。また、対応する実施の形態と同様の構成部材には、同じ符号を付すこととする。
1.第1の実施の形態に係る導光部材の変形例
図4(a)に示す例では、LEDモジュールを構成するLEDに青色LED114を用いている。そして、導光部材56の外周面に、青色LED114の出射光を黄色光に変換するための波長変換層である黄色蛍光体層116を形成している。
2.第2の実施の形態に係る導光部材の変形例
図4(c)に示す例では、LEDモジュールを構成するLEDに白色LED120を用いている。そして、導光部材108には、蛍光体層を形成していない。
3.第1の実施の形態に係る回路ユニットの支持方法の変形例
図5に示すのは、導光部材の中空部における回路ユニットの支持方法の変形例を示す図である。本例は、実施の形態1(図1)に対する変形例である。
4.第1の実施の形態に係る回路基板の設置向きの変形例
図6、図7に示すのは、導光部材の中空部における回路基板の設置向きの変形例を示す図である。本例は、実施の形態1(図1、図2)に対する変形例である。本変形例は、上記した実施の形態1とは、主として回路ユニットおよび導光部材(第1部材、第2部材)が異なる以外は、実施の形態1と同様である。よって、図6、図7において、図1、図2と同様の構成部分には同じ符号を付してその説明については省略し、以下異なる部分を中心に説明する。
<第3の実施の形態>
1.構成
図8(a)は、実施の形態3に係るLEDランプ160の概略構成を示す断面図である。LEDランプ160は、実施の形態1,2のLEDランプ10,102と基本的な構成は同じであるが、LEDランプ160は、HID(高輝度放電ランプ)の一般的な形状に近似させ、当該HIDランプに代わる光源を志向するものである。なお、図8(a)において、図1に示す実施の形態1に係るLEDランプ10と同様の構成部分には、同じ符号を付して、その詳細な説明については省略する。
2.光路
上記の構成からなるLEDランプ160によれば、LEDモジュール174から出射された光は、円筒状をした導光部材176のLEDモジュール174に対向する端面(口金166の存する側の端面(光入射部))から入射され、導光部材176と空気層との境界面で反射を繰り返しながら、導光部材176内を進行する。そして、前記境界面に対する入射角が臨界角以下の場合に、当該入射角に応じた分の光が導光部材176外へと出射される。そして、導光部材176内を進行する光は、最終的には口金166の存する側とは反対側の端面(光出射部)から出射される。
<第4の実施の形態>
第4の実施の形態を、図面を参照して詳細に説明する。第4の実施の形態に係るランプは、例えば、ミラー付きのハロゲンランプに形状及び性能を合わせたものである。一般に、反射鏡付きハロゲンランプは白熱電球よりも高輝度である。そのため、従来、ハロゲンランプと同等の輝度を得るためにLEDの個数を増やす必要があり、そうするとLEDモジュールにおける発熱量が増大してしまうため、電子部品の熱破壊による寿命低下の問題がより顕著となる。また、ハロゲンランプはタングステンフィラメントから広範囲に光を出射するのに対し、LEDの出射する光は指向性が強い。このため、反射鏡の基部に単に、LEDを反射鏡の光軸方向に光を出射するように設けたのでは、反射鏡を利用した配光特性がほとんど得られない。第4の実施の形態に係るランプは、上記の問題を解決する構成を有する。
1.構成
図9は、第4の実施の形態に係るLEDランプの構造を示す断面図であり、図10は台座、LEDモジュール、および導光部材を示す斜視図である。
(1)口金
口金220は、反射鏡5の基部側に設けられている。口金220には、種々のタイプがあり、この構成に限定されるものではないが、ここでは、シェル222がエジソンタイプ、例えばE11型となっている。
シェル222は、外周面がネジ状をしており、小径筒部81bに被着されている。なお、シェル222は、小径筒部81bに接着剤により固定されている。アイレット224は、小径筒部81bの内部を相通する配線90が半田付けされた構成となっている。
(2)台座
台座7は、その中央に配線88,90を通すための孔の開いた板状の円板部47と、筒状の円筒部49とからなる。台座7は上記の形状に限らず、任意の形状を取ることができる。台座7の円筒部49には、口金220が取着されている。
(3)LEDモジュール
LEDモジュール240は、図10に示すように、例えば円環状をしたプリント配線板からなる実装基板223と、これに実装された8個のLED227,229,231,233,235,237,239,241とを有する。実装基板223には、その円環の中心に沿って、円環中心軸周りに45度間隔で、LED227,…,241が実装されている。すなわち、LED227,…,241は、実装基板223の形状に対応し、環状に配されている。そして、LEDモジュール240は、光の出射方向を口金220と反対側に向けた状態で、反射鏡5内に設けられている。なお、LED227,…,241の各々は白色LEDである。
(4)導光部材
導光部材256は筒状をし、その先端部297(光出射部)が口金220と反対側に向くよう、台部材17に立設されている。導光部材256の内面には、LEDモジュール240から入射した光を、導光部材256の内面で反射させ、先端部297へ導くため、反射膜291が形成されている。
(5)回路ユニット
回路ユニット82は、回路基板84と当該回路基板84に実装された各種の電子部品86a,86bとから構成されており、導光部材256内に格納されている。具体的には、導光部材256の支持溝205に、回路基板84の周縁部が嵌め込まれて支持されている。回路ユニット82と口金220とは配線88,90により電気的に接続され、回路ユニット82は口金220から受電し、LEDモジュール240を発光させる。
(6)台部材
台部材17は、その反射鏡開口部43側の面に導光部材256及びLEDモジュール240を搭載すると共に、反対面で台座7に接している。図10に示すように、台部材17は、導光部材256の脚部260を嵌めこむために、内溝232と外溝234とを備えている。導光部材256は、内脚部202が内溝232に、外脚部203が外溝234に、それぞれ嵌めこまれ、不図示の接着剤によって台部材17に取り付けられている。台部材17の中央には、配線88,90を通すための孔が開いている。
(7)反射鏡
反射鏡5は、ハロゲンランプで用いられている反射鏡と同様なものが利用される。反射鏡5の形状等は特に限定されるものではないが、ここでは一端部に開口を有し、他端部に前記一端部よりも狭い開口を有するとともに、内面に反射面を有する椀状をした反射鏡5を用いている。すなわち、反射鏡5はその一端に開口部43を有する椀状をすると共に、椀状の底に相当する部分に開口45を有している。反射鏡5は例えばガラスやセラミック、金属、樹脂により構成されている。反射面は、例えば金属膜や白色の樹脂、透光性を有するガラスや樹脂により構成されている。反射面が透光性を有するガラスや樹脂により構成されている場合、漏れ光を作り出すことができる。
(8)前面板
前面板9は、透光性材料から構成され、反射鏡5の開口部43を塞ぐ。このため、前面板9は、反射鏡5の開口部43に対応した形状、具体的には、円盤状をしている。前面板は、ガラスや樹脂等を利用することができる。
2.電気的接続
図9に示すように、回路ユニット82と口金220とは、配線88,90により接続される。配線88,90は、その他端が口金220に、その一端が回路ユニット82にそれぞれ接続されている。LEDモジュール240と回路ユニット82とは、配線92,94により接続される。
3.放熱経路
LEDランプ201は、上記構成を有するため、LED227,…,241に発生した熱は、台座7から口金20へと伝熱し、口金20から照明器具のソケットを経由して、照明器具や壁及び天井へと放熱される。
4.光路
LED227,…,241から出射された光は、導光部材256の先端部297の反対面(光入射部267)に入射し、導光部材256内を進行する。そして、導光部材256内を進行する光は、最終的には、導光部材256の先端部297(光出射部)から出射される。先端部297から出射される光の一部は、導光部材256内で反射を繰り返して進行してきた光であるため、先端部297から、前面板9を通って外部へ放射状に出射される。残りの光は反射鏡5に到達し、その後、上述した放物曲面である反射面で反射された光は集光され、前面板9を通って外部へ出射される。
5.効果
本実施の形態では、回路ユニット82を導光部材256内に設けているため、台座7と口金220との間に回路ユニット82を格納するスペースが不要となり、LEDモジュール240を口金220に近い位置に搭載することが可能となり、ハロゲン電球に近い形状、大きさの反射鏡5を利用することができる。これにより、ハロゲン電球を利用していた従来の照明器具へのLEDランプ201の装着適合率を略100[%]にすることができる。
<第5の実施の形態>
第4の実施の形態では、発光体である半導体発光素子として白色LEDを用いたが、半導体発光素子として青色LEDを用いた形態を第5の実施の形態として説明する。また、第5の実施の形態では、台部材17を用いず、導光部材56が台座307の表面である円板部347に立設された形態とする。なお、第1~4の実施の形態で説明した構成と同じものについては、第1~4の実施の形態と同じ符号を用いる。
(1)構成
図11は、第5の実施の形態に係るLEDランプ301の構造を示す断面図である。
(2)効果
この構成では、第4の実施の形態で用いた台部材17を用いないため、組立工数を減らすことができる。
<第6の実施の形態>
第6の実施の形態について図面を用いて説明する。なお、第1~5の実施の形態で説明した構成と同じものについては、第1~5の実施の形態と同じ符号を用いる。
1.構成
図12は、第6の実施の形態に係るLEDランプ401の構造を示す断面図である。
2.効果
台部材17、台座7、及び前面板9を設けていないため、組立工数を抑えることができる。
<第7の実施の形態>
第7の実施の形態について図面を用いて説明する。なお、第1~6の実施の形態で説明した構成と同じものについては、第1~6の実施の形態と同じ符号を用いる。
1.構成
図13は、第7の実施の形態に係るLEDランプ501の構造を示す断面図である。
2.効果
導光部材556が口金220に直接立設され、台部材17や台座7を設けていないため、組立工数を抑えることができる。
<第8の実施の形態>
上記実施の形態では、LEDモジュールは導光部材の脚部に配置したが、このLEDモジュールに加えて反射鏡の反射面部分を台座として、リング状にLEDを配置した形態を、第8の実施の形態として説明する。なお、第1~7の実施の形態で説明した構成と同じものについては、第1~7の実施の形態と同じ符号を用いる。
1.構成
図14は、第8の実施の形態に係るLEDランプ601の構造を示す断面図である。
2.効果
LEDを多く設けられるので、LEDランプ601の光量を上げることができる。
<第9の実施の形態>
本発明を実施するための第9の実施の形態を、図面を参照して詳細に説明する。
1.全体構成
図15は、第9の実施の形態に係るLEDランプ701の構造を示す断面図である。
(1)口金
口金720は、反射鏡705の突出部731の開口を塞ぐように、反射鏡705の突出部731の一端及び導光部材756の一端に装着されている。なお、口金720の反射鏡705への装着は、例えば、ネジ、接着剤、係止構造等により行うことができ、ここでは接着剤により固着されている。
(2)LEDモジュール
LEDモジュール740は、実装基板721と、実装基板721の表面に実装された複数のLED723と、実装基板721上において複数のLED723を被覆する封止体725とを備える。
(3)導光部材
導光部材756は、上述したように内部に中空部756aがあり、本体部741と脚部743とを有し、本体部741が反射鏡705の底から延設する状態で、反射鏡705に設けられている。
(4)回路ユニット
回路ユニット82は、回路基板84と、当該回路基板84に実装された各種の電子部品86a,86bとから構成されている。回路ユニット82の導光部材756内の格納は、例えば、回路基板84が導光部材756の中空部756aにおける一端側の端面に取着されることによりなされている。回路基板84は、接着剤により導光部材756に固着されている。
(5)反射鏡
反射鏡705は、全体形状が漏斗状をし、漏斗状の一部を形成する円錐状をした本体部729と、漏斗状の一部を形成する筒状の突出部731とを備える。つまり、一端(ここでは、口金720と反対側の端である。)部に開口を有し、他端部に一端部よりも狭い開口を有するとともに、内面に反射面を有する漏斗状をしている。
なお、前面板9は実施の形態4等で用いたものと同様の構成を有する。
2.電気的接続
(1)回路ユニットと口金との接続
回路ユニット82と口金720とは、上述したように、配線790,791により接続される。配線790,791は、図15に示すように、口金本体783の内部(第2凹入部分705及び第1凹入部分703)、LEDモジュール740の実装基板721の貫通孔707,709(図16参照)、導光部材756の脚部743の内部及び導光部材756の本体部741の連絡孔745,747を通る。
(2)回路ユニットとLEDモジュールとの接続
回路ユニット82とLEDモジュール740とは、配線788,789により接続される。配線788,789は、図15に示すように、導光部材756の脚部743の内部、導光部材756の本体部741の連絡孔745,747を通る。また、配線788,789と回路ユニット82との接続は半田(図示省略)により行われている。配線788,789は、図15及び図16では表れていないが、さらに、配線790,791と一緒に連絡孔745,747を挿通する。また、口金720とLED723とは電極パッド715,717を介して接続されている。
なお、配線788,789とLEDモジュール740との接続及び配線788,789と回路ユニット82との接続は、半田(図示省略)により行われている。
3.放熱経路
本実施の形態に係るLEDランプ701は、実施の形態4等と同様に、点灯時にLED723に発生した熱は口金720へと伝熱し、口金720からソケットを経由して照明器具の本体や壁や天井へと放熱される。
4.光路
上述の構成により、LEDモジュール740は、口金720の口金本体783と導光部材756の脚部743と導光部材756の本体部741の端面761とで形成される空間内に配されることとなり、LEDモジュール740のLED723の光出射面(封止体725の表面である。)と導光部材756の本体部741の端面761とが対向する。つまり、導光部材756の本体部741の端面761が、LEDモジュール740から出射された光入射部となる。
5.効果
この構成では、中空部756aがLEDモジュール740に対して口金720と反対側に位置するため、LEDモジュール740と口金720との間に回路ユニット82を格納する必要がなく、LEDモジュール740と口金720との距離を小さくでき、LEDモジュール740から口金720へと伝導する熱量を増加させることができる。
<第10の実施の形態>
LEDモジュールから出射される光が青色光の場合を、第10の実施の形態として説明する。なお、第1~9の実施の形態で説明した構成と同じものについては、第1~9の実施の形態と同じ符号を用いる。
1.構成
図17は、第10の実施の形態に係るLEDランプ801の構造を示す断面図である。
2.効果
上記構成により、LEDモジュール840から青色光が出射された後に導光部材856に入射し、出射部815から出射される際に、青色光の一部が黄色光に変換され、導光部材856からそのまま出射された青色光と、蛍光体層822で波長変換された黄色光とが混色され、結果的にLEDランプ801からは白色光が出力される。
<第11の実施の形態>
第9及び第10の実施の形態では、前面板9を反射鏡に装着していたが、導光部材の出射部から出射する光が所望の光色である場合、前面板を設けない開放型のランプであっても良い。
1.全体構成
図18は、第11の実施の形態に係るLEDランプ901の構造を示す断面図である。
2.導光部材
導光部材956は、上述のように、反射鏡905の第1孔部923に一部が挿入される支持部925と、支持部925の一端(口金920と反対側の端である。)から膨出する膨出部937とを有し、膨出部937の中空部956aに回路ユニット982の一部が収納されている。
3.効果
この構成により、例えば、調光点灯用の回路ユニットとして電子部品数が多くなったり、導光部材が小型化したりして、回路ユニットを構成するすべての電子部品等が中空部内に収まらないような場合でも、電子部品986,986bを格納する空間を分けることで、対応することができる。
<第12の実施の形態>
第9~第11の実施の形態では、回路ユニット82,982に対する熱対策を施していなかったが、回路ユニットに対しても熱対策を施しても良く、回路ユニット82,982の熱対策を行った形態を第12の実施の形態として以下説明する。
1.構成
図19は、第12の実施の形態に係るLEDランプ1001の構造を示す断面図である。
2.効果
上述の構成により、回路ユニット82に蓄積した熱を、伝導部材1070である棒体1033から口金1020へと伝導し、回路ユニット82の温度上昇を抑制できる。
<変形例>
以上、本発明の構成を第1から第12の実施の形態に基づいて説明したが、本発明は上記実施の形態等に限られない。例えば、以下のような変形例を挙げることができる。
1.口金
実施の形態等では,エジソンタイプの口金を利用したが、他のタイプ、例えば、ピンタイプ(具体的にはGY、GX等のGタイプである。)を利用しても良い。
2.LEDモジュール
(1)実装基板
実装基板は、樹脂基板、セラミック基板、樹脂板と金属板とから成る金属ベース基板等、既存の実装基板を利用することができる。
(2)LED
実施の形態等では、青色発光のLEDと、青色光を黄色光に変換する変換部材について説明したが、他の発光色のLEDを用いても良い。その場合、LEDランプに要求されている所望の光色に変換する波長変換材料を用いる必要がある。
(3)封止体
実施の形態9~12では、封止体は、実装基板上に実装されたすべてのLEDを被覆していたが、例えば、一つのLEDに対して1つの封止体で被覆しても良いし、複数のLEDをグループ分けして、所定数のLEDに対して1つの封止体で被覆しても良い。
(4)LEDの実装基板への配置
実施の形態等では、LEDを円環状に配置したが、配置の形態はこれに限らない。例えば、楕円形の環状や、方形の環状、あるいは、多角形の環状に配置しても構わない。
3.波長変換について
実施の形態9~12では、LEDから出射された光の波長を変換する蛍光体粒子を封止体に含めたり、蛍光粒子を含む蛍光体層を、導光部材の出射部に形成したりしたが、例えば、第8及び第9の実施の形態における前面板の裏面に蛍光体層を形成しても良いし、また、LEDモジュールから出射された光が導光部材に入射する入射面に蛍光体層を形成しても良い。
4.導光部材
(1)全体構成
LEDの実装基板への配置に合わせて、導光部材の形状は楕円筒状、方形筒状、多角形の筒状とする。すなわち、筒状の導光部材の一端面から、環状に配されたLEDからの出射光を入射させるため、導光部材の形状(前記一端面に形状)を当該LEDの配列形状に合致させたものとするのである。なお、導光部材は、台部材、台座、口金等の表面に立設することができる。
(2)導光部材の先端部
実施の形態等では、先端が半球状あるいは球状の導光部材を用いたが、これに限らず、切頂四面体、切頂六面体、切頂八面体、切頂十二面体、切頂二十面体、斜方立方八面体、斜方二十または十二面体、斜方切頂立方八面体、斜方切頂二十または十二面体、変形立方体および変形十二面体等の斜方立方八面体以外の半正多面体でも良い。
5.回路ユニット
実施の形態9~12では、回路ユニットの回路基板は、その主面がランプ軸と直交する姿勢で配置されていたが、回路基板は、その主面がランプ軸と平行になる姿勢で配置されても良いし、ランプ軸に対して傾斜した姿勢で配置しても良い。
6.伝導部材
伝導部材は、熱伝導性の良い材料で構成されていることが望ましい。その形状は楕円筒状、方形筒状、多角形の筒状等を採っても良い。また、伝導部材を介し回路ユニットと口金との間に電気が流れないように、絶縁性を確保することが好ましい。
20,166 口金
44,46,48,50,52,54,106,114,120 LED
56,108,132,176 導光部材
82,190 回路ユニット
96,170 グローブ
100 外囲器
Claims (18)
- 口金を含む外囲器内に、
半導体発光素子と、
前記半導体発光素子を発光させるための回路ユニットと、
内部に中空部を有するとともに、光入射部と、前記光入射部と連続する光出射部とを有する導光部材と
を備え、
前記光入射部が前記半導体発光素子と対向配置された状態で、前記外囲器内に保持されているとともに、前記回路ユニットの少なくとも一部が、前記導光部材の中空部に収納されている
ことを特徴とするランプ。 - 前記外囲器は、さらにグローブを含み、
前記導光部材は筒状であり、前記グローブ内に前記光入射部を前記口金に向けた状態で設けられており、
前記半導体発光素子は複数個設けられ、当該複数個の半導体発光素子は光の出射部を前記光入射部に対向させた状態で、当該光入射部の周方向に並べられている
ことを特徴とする請求項1に記載のランプ。 - 前記複数の半導体発光素子が周方向に間隔を空けて実装された円環状の実装基板と、
前記実装基板が搭載された台座と、
当該台座と前記口金とを連結する熱伝導部材と、
を有する
ことを特徴とする請求項2に記載のランプ。 - 前記台座は、板状をしており、
前記熱伝導部材は、テーパ筒状をしていて、
前記熱伝導部材の大径側端部に前記台座が、小径側端部に前記口金が取り付けられている
ことを特徴とする請求項3に記載のランプ。 - 前記導光部材の内周面に反射膜が形成されている
ことを特徴とする請求項2に記載のランプ。 - 前記導光部材の外周面に、前記半導体発光素子が発する光をこれとは波長の異なる光に変換する波長変換層が形成されている
ことを特徴とする請求項2に記載のランプ。 - 前記グローブの内周面に、前記半導体発光素子が発する光をこれとは波長の異なる光に変換する波長変換層が形成されている
ことを特徴とする請求項2に記載のランプ。 - 前記外囲器は、さらに一端部に開口を有するとともに、内面に反射面を有する反射鏡を含み、
前記口金が前記反射鏡の他端部に設けられ、
前記導光部材の光出射部が前記反射鏡の焦点又はその付近に位置する
ことを特徴とする請求項1に記載のランプ。 - 前記半導体発光素子は複数個設けられ、出射方向を前記口金と反対側に向けた状態で前記反射鏡の中心軸周りに環状に配され、
前記導光部材は筒状である
ことを特徴とする請求項8に記載のランプ。 - 前記導光部材は有底筒状をし、前記光出射部がドーム状に形成されている
ことを特徴とする請求項9に記載のランプ。 - 前記導光部材の光出射部は、拡散処理されることで内部を進行する光を外部へと出力する
ことを特徴とする請求項9または10に記載のランプ。 - 前記導光部材の内周面に反射膜が形成されている
ことを特徴とする請求項9から11のいずれか1項に記載のランプ。 - 前記回路ユニットは、一部が前記導光部材に内蔵されており、残りの部分が前記口金と前記半導体発光素子との間に配置されている
ことを特徴とする請求項9から12のいずれかに記載のランプ。 - 前記導光部材は柱状であり、内部に中空部が設けられている
ことを特徴とする請求項8に記載のランプ。 - 前記導光部材の中心軸は、前記反射鏡の光軸と一致している
ことを特徴とする請求項14に記載のランプ。 - 前記中空部は、前記導光部材の光入射部よりも光出射部に近い部位にある
ことを特徴とする請求項14または15に記載のランプ。 - 前記導光部材の光出射部は、拡散処理されることで内部を進行する光を外部へと出力する
ことを特徴とする請求項14から16のいずれか1項に記載のランプ。 - 前記導光部材の内周面に反射膜が形成されている
ことを特徴とする請求項14から17のいずれか1項に記載のランプ。
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US20130077285A1 (en) | 2013-03-28 |
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JPWO2012042843A1 (ja) | 2014-02-03 |
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