JP4755276B2 - Light source for illumination - Google Patents

Light source for illumination Download PDF

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Publication number
JP4755276B2
JP4755276B2 JP2009176684A JP2009176684A JP4755276B2 JP 4755276 B2 JP4755276 B2 JP 4755276B2 JP 2009176684 A JP2009176684 A JP 2009176684A JP 2009176684 A JP2009176684 A JP 2009176684A JP 4755276 B2 JP4755276 B2 JP 4755276B2
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Prior art keywords
light emitting
light
light source
illumination
surface
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JP2010086946A (en
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誠 森川
隆在 植本
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パナソニック株式会社
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-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
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20Light sources comprising attachment means
    • F21K9/23Retrofit 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
    • F21K9/232Retrofit 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-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
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20Light sources comprising attachment means
    • F21K9/23Retrofit 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
    • F21K9/233Retrofit 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/22Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-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
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00Globes; Bowls; Cover glasses
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING 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
    • F21Y2107/00Light sources with three-dimensionally disposed light-generating elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING 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
    • F21Y2107/00Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/60Light sources with three-dimensionally disposed light-generating elements on stacked substrates
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING 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
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Description

  The present invention relates to an illumination light source to which a light emitting module such as an LED module is applied, and a lighting fixture with a reflector using the same, and more particularly to a technique for improving light distribution characteristics.

  In recent years, in the field of lighting, technologies for applying light emitting elements such as LEDs (Light Emitting Diodes) to illumination light sources have been researched and developed, and as part of this, they can also be applied to light bulb-type illumination light sources that replace incandescent bulbs. It is being considered. The basic configuration of a light bulb-shaped illumination light source consists of a base, a light emitting module mounted on the base, a lighting circuit for lighting the light emitting module, a case for fixing the base and housing the lighting circuit, and a glove that covers the light emitting module A base attached to the case. The light emitting module is composed of a mounting substrate and a light emitting portion, and the light emitting portion is composed of a resin molded body containing a light emitting element and a phosphor.

JP 2003-124528 A

Incandescent light bulbs can extract light in almost all directions, not only in the front but also to the side and back, except for some areas that are shaded by the base. For this reason, incandescent light bulbs are used in various forms. For example, many lighting fixtures that take out light from the side of the incandescent light bulb are also used.
On the other hand, since the above-described light source for bulb-shaped illumination has a strong directivity of light emitted from the light emitting unit, light can hardly be extracted at an angle exceeding 60 ° from the front front of the light emitting unit. For this reason, the light distribution angle in the above-mentioned light bulb-shaped illumination light source is 120 ° or less, and is significantly narrower than the conventional incandescent light bulb can distribute light in almost all directions. There exists a subject that it cannot substitute for an incandescent lamp in a specific use mode.

In addition, there is an incandescent bulb with a reflector that includes a reflector for condensing light forward, but the above-described light source for bulb-shaped illumination is reflected in a specific use mode even if a reflector is attached. There is a problem that it cannot be replaced with an incandescent lamp with a mirror.
This is because the light distribution in the incandescent lamp and the above-described light source for bulb-shaped illumination is different from each other when the reflecting mirror is not attached. This is because there is a difference.

  Accordingly, an object of the present invention is to provide an illumination light source capable of bringing the light distribution angle closer to that of an incandescent light bulb than in the past, and a reflector-equipped luminaire using the same.

An illumination light source according to the present invention is an illumination light source in which a plurality of light emitting modules are mounted on a base, and the base includes a first base portion and a central portion of an upper surface of the first base portion. A plurality of light emitting modules including at least one first light emitting module disposed on an upper surface of the first base portion, and the second light emitting module. is composed of at least one second light emitting module disposed on the upper surface of the 2 base portion, in a case where the second base plate portion is projected from above the first base plate portions, wherein at least the projection region there is a part of the light-emitting surface in one of the first light emitting module, that there is the rest of the light emitting surface in the projection outside, the side of the second base portion, constitutes a light reflecting surface It is characterized by.

Here, “upward” refers to a direction perpendicular to the upper surface of the second base portion and facing the upper surface.
Moreover, the lighting fixture with a reflecting mirror according to the present invention includes the illumination light source and a reflecting mirror having a concave inner surface, and the first and second light emitting modules exist in the reflecting mirror. The reflecting mirror is attached to the base.

According to the illumination light source having the above-described configuration, the plurality of light emitting modules protrudes in a reverse frustum shape from the first light emitting module disposed on the upper surface of the first base portion and the upper surface of the first base portion. A second light emitting module disposed on the upper surface of the second base part, and in the projection area when the second base part having an inverted frustum shape is projected from above onto the first base part, part of the light-emitting surface is present in at least one first light emitting module. Therefore, the light emitted from a part of the light emitting surface of the at least one first light emitting module is reflected by the light reflecting surface on the side surface of the second base part, and the lateral and rear angles of the first light emitting module. (An angle of 60 ° or more from the front front of the illumination light source). In this way, the light of the first light emitting module can be taken out at an angle of 60 ° or more from the front front of the illumination light source, and the light of the second light emitting module can be taken at 60 ° or less from the front front of the illumination light source. Since it can be taken out at an angle, the light distribution angle can be made closer to that of an incandescent light bulb than a conventional light source for bulb-type illumination.

  In addition, the illuminating device with a reflector having the above-described configuration includes an illumination light source whose light distribution angle is made closer to that of an incandescent light bulb. Therefore, compared with the case where a reflector is attached to a conventional light bulb-shaped illumination light source, The light distribution can be made closer to an incandescent bulb with a reflector.

It is a disassembled perspective view which shows the structure of the light source for illumination which concerns on 1st Embodiment. It is sectional drawing which shows the structure of the light source for illumination which concerns on 1st Embodiment. It is sectional drawing which shows the principal part of the light source for illumination which concerns on 1st Embodiment. It is a top view which shows the principal part of the light source for illumination which concerns on 1st Embodiment. It is a light distribution curve figure which shows the light distribution characteristic of the light source for illumination which concerns on 1st Embodiment. It is an illuminance distribution figure which shows the illuminance distribution of the light source for illumination which concerns on 1st Embodiment. It is a circuit diagram which illustrates the composition of the lighting circuit of the light source for illumination concerning a 1st embodiment. FIG. 8 is a list diagram illustrating a lighting pattern in the lighting circuit of FIG. 7. It is sectional drawing which shows the structure of the lighting fixture with a reflecting mirror which concerns on 2nd Embodiment. It is a side view including the partial cross section which shows the structure of the lighting fixture with a reflecting mirror which concerns on 3rd Embodiment. It is sectional drawing which shows the principal part of the light source for illumination which concerns on a modification. It is sectional drawing which shows the principal part of the light source for illumination which concerns on a modification. It is the light source for illumination which concerns on a modification, Comprising: (a) is a perspective view which shows the principal part, (b) is a top view which shows the principal part. It is the light source for illumination which concerns on a modification, Comprising: (a) is sectional drawing which shows the principal part, (b) is a top view which shows the principal part. It is the light source for illumination which concerns on a modification, Comprising: (a)-(e) is a schematic diagram which shows the principal part. It is sectional drawing which shows the principal part of the lighting fixture with a reflecting mirror which concerns on a modification.

DESCRIPTION OF EMBODIMENTS Embodiments for carrying out the present invention will be described in detail with reference to the drawings.
[First Embodiment]
<Overall configuration>
FIG. 1 is an exploded perspective view showing a configuration of an illumination light source according to the first embodiment of the present invention.
As shown in FIG. 1, the illumination light source 1 is a ring-shaped case 11, an E-shaped base 12 protruding from the bottom of the case 11, and an annular shape disposed on the opening 11 b side of the case 11. The first heat sink member 21 on which the first light emitting module 31 is mounted, the second heat sink member 22 on which the square second light emitting module 32 is mounted, and the globe 14 for covering the light emitting modules 31 and 32 are provided. Yes.

FIG. 2 is a cross-sectional view showing the configuration of the illumination light source according to the first embodiment. As shown in FIG. 2, the illumination light source 1 further includes a lighting circuit 13 that controls lighting of the first and second light emitting modules 31 and 32, and the lighting circuit 13 includes the first heat sink member 21 and the case 11. Are accommodated in an accommodation chamber 17 formed by
The case 11 has an annular fitting portion 11 a that is an end portion on the opening 11 b side and is fitted into the first heat sink member 21.

  The first heat sink member 21 has an inverted truncated cone shape, and the first upper surface 21a on the large diameter side is formed flat, and the first light emitting module 31 is disposed on the first upper surface 21a. On the other hand, on the first lower surface 21b on the small diameter side of the first heat sink member 21, a concave portion 21c recessed inward is formed. The fitting portion 11a of the case 11 is fitted and fixed to the recess 21c. As a result, the opening 11 b of the case 11 is sealed, and the accommodation chamber 17 is formed by the inner space of the recess 21 c and the inner space of the case 11. And the annular base part 21d is formed in the innermost part of the recessed part 21c, and the circuit board 15 of the lighting circuit 13 is attached with the screw (not shown).

  The second heat sink member 22 has an inverted frustoconical shape, and is disposed at the center of the first upper surface 21 a so as to protrude from the first heat sink member 21. The second upper surface 22a of the second heat sink member 22 is parallel to the first upper surface 21a, and the second light emitting module 32 is disposed on the second upper surface 22a. The side surface 22c is linear from the end portion on the second lower surface 22b side toward the end portion on the second upper surface 22a side. On the side surface 22c, a mirror finish or a diffusing surface finish (Ra 0.4 or more) is applied over the entire circumferential direction to form a light reflecting surface 23 that reflects light. In the case of mirror finishing, the reflected light from the light reflecting surface 23 can be effectively emitted in a certain direction. In the case of the diffusing surface finish, the light incident on the light reflecting surface 23 is reflected in various directions due to the unevenness of the surface of the light reflecting surface 23. Therefore, when viewed from the entire reflected light by the light reflecting surface 23, The reflected light is diffused and emitted. Thereby, the reflected light from the light reflecting surface 23 can be emitted uniformly without any brightness unevenness. Whether the light reflecting surface 23 is finished to be a mirror surface or a diffusing surface may be selected according to the usage of the illumination light source 1.

  The first and second heat sink members 21 and 22 are made of a metal material, and can be manufactured using, for example, Al, Ag, Au, Ni, Rh, Pd, or an alloy thereof, or an alloy of Cu and Ag. . Since such a metal material has high thermal conductivity, the first and second heat sink members 21 and 22 can efficiently dissipate the heat generated in the light emitting modules 31 and 32. In addition, the above-mentioned types of metal materials have an advantage that they can be easily surface-treated and the surface thereof can be easily mirror-finished or diffused-surfaced.

The second heat sink member 22 and the first heat sink member 21 can be attached by, for example, brazing or soldering. A method of forming a female screw on one of the first heat sink member 21 and the second heat sink member 22 and forming a male screw that matches the female screw on the other and screwing the female screw and the male screw together. May be used.
The lighting circuit 13 further includes various electronic components 16 mounted on the circuit board 15. The lighting circuit 13 is electrically connected to the E-type base 12 and supplies power supplied through the E-type base 12 to the first and second light emitting modules 31 and 32. A detailed configuration and lighting control function in the lighting circuit 13 will be described later.

  The globe 14 is fixed to the first upper surface 21 a of the first heat sink member 21, and the first and second light emitting modules 31 and 32 and the second heat sink member 22 are disposed in the globe 14. The globe 14 is subjected to a process for performing light diffusion. Accordingly, the appearance of the illumination light source 1 can be adjusted to be similar to the appearance of an incandescent bulb, and the unevenness of the light emitted from the first and second light emitting modules 31 and 32 by the globe 14 can be reduced.

In the present embodiment, the F side of the illumination light source 1 shown in FIG. 2 is referred to as the front side or the front side, and the opposite R side is referred to as the rear side or the rear side. A direction orthogonal to the front-rear direction is referred to as a side.
<Relationship between light emitting module and light reflecting surface>
Next, according to FIGS. 3 and 4, the geometrical arrangement relationship between the light emitting modules 31 and 32 and the light reflecting surface 23 in the illumination light source 1 will be described.

In the second heat sink member 22, when projected from the upper side of the second upper surface 22 a (F side in FIG. 3) onto the first heat sink member in the vertical direction, a projection region 24 is obtained on the first upper surface 21 a of the first heat sink member 21.
The first light emitting module 31 includes a first mounting substrate 33 and a first light emitting unit 34 mounted on the first mounting substrate 33, and an approximately half region on the radially inner side of the first light emitting unit 34 is A region outside the projection region 24 and outside in the radial direction is out of the projection region 24. Therefore, in the present embodiment, the first light emitting module 31 has an annular light emitting surface constituted by the upper surface (F-side surface) of the first light emitting unit 34, and the radially inner side of this light emitting surface. This area (inner edge) is present in the projection area 24.

  As described above, the light reflecting surface 23 is disposed so as to cover the front of the first light emitting unit 34, and therefore, the light emitted mainly from the region in the projection area 24 of the first light emitting unit 34 (FIG. 3). Most of the arrow L1) is reflected by the light reflecting surface 23, and is effectively emitted at a side or rear angle of the illumination light source 1 (an angle of 60 ° or more from the front front of the illumination light source 1). (Arrow L2 in FIG. 3). On the other hand, most of the light emitted from the area outside the projection area 24 in the first light emitting unit 34 (arrow L3 in FIG. 3) is in front of the illumination light source 1 (60 ° or less from the front front of the illumination light source 1). (Angle range). Even in the emitted light from the region outside the projection area 24 in the first light emitting unit 34, a part of the light is incident on the light reflecting surface 23 and reflected by the light reflecting surface 23, and is on the illumination light source 1 side. The light is emitted at both the rear and rear angles.

  Moreover, the reflected light (arrow L2 of FIG. 3) by the light reflection surface 23 is radiate | emitted over the whole circumferential direction of the light source 1 for illumination, as shown in FIG. 3 and 4, the light (arrow L1) emitted from the region within the projection area 24 of the first light emitting unit 34 and the light (arrow indicated by the area outside the projection area 24 of the first light emitting unit 34). L3) and the light emitted from the light reflecting surface 23 (arrow L2) are schematically shown for easy understanding.

The second light emitting module 32 includes a second mounting substrate 35 and a second light emitting unit 36 mounted on the second mounting substrate 35, and the light emitted from the second light emitting unit 36 is a light source for illumination. 1 is emitted forward.
Light emitted from the second light emitting module 32, light emitted from a region within the projection area 24 in the first light emitting unit 34 of the first light emitting module 31 (including light reflected by the light reflecting surface 23), The light emitted from the region outside the projection region 24 in the first light emitting unit 34 of the light emitting module 31 (including the light reflected by the light reflecting surface 23) has a light emitting region different from each other and a light emitting region overlapping each other. Thus, they are configured to complement each other. Thereby, while the light distribution angle of the illumination light source 1 expands, the light distribution can be made uniform, and the brightness unevenness can be further reduced.

Each of the first and second light emitting units 34 and 36 emits light upon receiving power from the lighting circuit 13. Specifically, the first and second light emitting units 34 and 36 are, for example, formed to include a blue LED and the blue LED. And a silicone resin molded body containing a yellow phosphor material. In the present embodiment, the total number of blue LEDs in the second light emitting unit 36 is set to be equal to or greater than the total number of blue LEDs in the first light emitting unit 34. Further, the number of the blue LEDs in the region within the projection area 24 in the first light emitting unit 34 and the number of the blue LEDs in the region outside the projection area 24 in the first light emitting unit 34 are equal to or less than the same number.
<Light distribution characteristics>
Next, the light distribution characteristics of the illumination light source 1 will be described.

  FIG. 5 is a light distribution curve diagram showing the light distribution characteristics in the illumination light source 1, and shows an example of the simulation result. The light distribution curve diagram shown in FIG. 5 represents the magnitude of the luminous intensity in each direction of 360 ° including the front-rear direction of the illumination light source 1, 0 ° for the front front of the illumination light source 1 and 180 ° for the rear rear. As shown, the scales are displayed at intervals of 10 ° clockwise toward the front and counterclockwise. Further, the radial scale of the light distribution curve diagram represents the magnitude of the luminous intensity. In FIG. 5, each light distribution curve normalized with the maximum value of each light intensity in each light distribution curve as 1 is displayed.

In FIG. 5, a light distribution curve 50 when the first and second light emitting modules 31 and 32 are both turned on is indicated by a broken line, and a light distribution curve 51 when the first light emitting module 31 is lit alone is one point. It is indicated by a chain line. In addition, a light distribution curve 52 when the second light emitting module 32 is lit alone is indicated by a solid line.
In the present embodiment, the light distribution angle refers to the size of an angle range in which a luminous intensity that is half or more of the maximum luminous intensity of the illumination light source is emitted. Therefore, in FIG. 5, the size of the angle range in which the luminous intensity is 0.5 or more in each of the light distribution curves 50 to 52 indicates the light distribution angle in each illumination light source 1.

  As understood from FIG. 5, the size of the angle range in which the luminous intensity of the light distribution curve 52 is 0.5 or more is about 110 °, and the magnitude of the angular range in which the luminous intensity of the light distribution curve 51 is 0.5 or more. Is about 130 °. Further, the size of the angle range in which the luminous intensity of the light distribution curve 50 is 0.5 or more is about 165 °. Accordingly, in the illumination light source 1, when both the first and second light emitting modules 31 and 32 are lit, a wider arrangement than when the first light emitting module 31 or the second light emitting module 32 is lit alone. It can be seen that the light angle can be obtained. This is because when one of the first and second light emitting modules 31 and 32 is lit alone, the brightness of the light is increased and the luminous flux is increased. This is considered to be due to an increase in light emitted at the side and rear angles of the illumination light source 1 (an angle of 60 ° or more from the front front of the illumination light source 1).

FIG. 6 is an illuminance distribution diagram showing the illuminance distribution of the illumination light source 1 and shows the brightness (illuminance) of light emitted from the illumination light source 1 on a planar irradiated surface (not shown).
In FIG. 6, the illuminance distribution curve 60 when both the first and second light emitting modules 31 and 32 are lit is shown by a broken line, and the illuminance distribution curve 61 when the first light emitting module 31 is lit alone is shown. It is shown with a dashed-dotted line. In addition, the illuminance distribution curve 62 when the second light emitting module 32 is lit alone is indicated by a solid line. In FIG. 6, the vertical axis indicates the relative value of illuminance within each of the illuminance distribution curves 60 to 62, and the horizontal axis indicates the relative position in the width direction of the irradiated surface. Accordingly, the central portion of the horizontal axis represents the front position of the front side of the illumination light source 1 on the irradiated surface, and from the front side of the illumination light source 1 to the periphery as it goes from the central portion toward both ends of the horizontal axis. It represents the position away from.

As shown in FIG. 6, the illuminance distribution curve 62 is a curve having one high peak in the central portion of the horizontal axis, whereas the illuminance distribution curve 61 is located away from the central portion of the horizontal axis toward both ends. Further, it is a curve having two peaks lower than the peak of the illuminance distribution curve 62. The illuminance distribution curve 60 has a single peak at the central portion of the horizontal axis, but is a gentle curve compared to the illuminance distribution curve 62 and the illuminance distribution curve 61. That is, in the second light emitting module 32, the illuminance in the front front of the illumination light source 1 is the highest, and in the first light emitting module 31, the illuminance in the peripheral portion is higher than the front front of the illumination light source 1, By lighting both the first and second light emitting modules 31 and 32, a predetermined range from the front front to the periphery of the illumination light source 1, specifically, between the two peaks in the illuminance distribution curve 62 is constant. Illuminance can be obtained.
<Lighting circuit>
FIG. 7 is a circuit diagram illustrating the configuration of the lighting circuit 13. As shown in FIG. 7, the lighting circuit 13 includes an AC / DC converter 16a, a capacitor 16b, a resistor 16c, an IC controller 16d, and transistors 16e and 16f. It supplies to 2 light emitting modules 31 and 32. Of these, the IC controller 16d and the transistors 16e and 16f constitute a DC / DC converter 16g. Further, the IC controller 16d is connected to the operation unit 19 provided outside the illumination light source 1 by wire or wirelessly, and the first and the first are controlled according to the lighting, extinction, and dimming instructions from the operation unit 19. The lighting control of the two light emitting modules 31 and 32 is controlled. The first and second light emitting modules 31 and 32 are connected in parallel to each other, and the currents flowing through them are individually controlled by the IC controller 16d and the transistors 16e and 16f. The first lighting means for controlling the lighting of the first light emitting module 31 includes a functional unit that controls the transistor 16e of the IC controller 16d, the transistor 16e, and the like, and the second lighting means for controlling the lighting of the second light emitting module 32 is The IC controller 16d includes a functional unit that controls the transistor 16f, the transistor 16f, and the like. The control of the transistors 16e and 16f is to turn on and off the current flowing through each transistor. The first dimming means for adjusting the dimming level of the first light emitting module 31 includes a functional unit that controls the transistor 16e of the IC controller 16d, the transistor 16e, and the like, and the dimming of the second light emitting module 32 is performed. The second dimming means for adjusting the level is configured by a functional unit that controls the transistor 16f of the IC controller 16d, the transistor 16f, and the like. Control of the transistors 16e and 16f in dimming is changing the current flowing through each transistor.

FIG. 8 is a list illustrating the lighting pattern 40 in the lighting circuit 13.
As shown in FIG. 8, the lighting pattern 40 has patterns 1 to 9 that are combinations of lighting states in the first and second light emitting modules 31 and 32. In FIG. 8, the state where each light emitting module 31, 32 is turned on is indicated by “◯”, and the state where each light emitting module 31, 32 is turned off is indicated by “×”. In addition, the dimming level can be adjusted in two steps in a state where each light emitting module 31 and 32 is turned on. The state where the brightness of light is strong is “light control level 1”, and the weak state is “light control level 2”. ". This two-stage dimming level is adjusted by the IC controller 16d.

As described above, in the present embodiment, the illumination light source 1 can be switched to the 9 patterns of the illumination state by the first and second lighting means and the first and second dimming means. The lighting pattern 40 can be used properly according to the application.
Note that the lighting pattern 40 in FIG. 8 is configured to have two levels of dimming levels, but can also be configured to be able to adjust the dimming levels in multiple stages, such as three stages or four stages. In this case, the number of lighting patterns is 16 patterns if the dimming level is 3 levels, and 25 patterns if the level is 4 levels. By subdividing the dimming level in this way, the number of lighting patterns increases and the lighting state of the illumination light source can be set more finely.

  As described above, the illumination light source 1 according to the present embodiment includes the first and second light emitting modules 31 and 32, and illuminates a part of the light emitted from the first light emitting module 31. The light can be reflected by the light reflecting surface 23 facing obliquely rearward of the light source 1 and effectively emitted to the side and rear angles of the illumination light source 1. Therefore, the light of the second light emitting module is emitted at an angle of 60 ° or less from the front front of the illumination light source 1, and the light of the first light emitting module is emitted at an angle of 60 ° or more from the front front of the illumination light source 1. Can be emitted. Thereby, the light distribution angle in the illumination light source 1 can be expanded to an angle of 120 ° or more centering on the front front of the illumination light source 1, and a conventional LED having a light distribution angle of 120 ° or less is used. It can be made closer to the light distribution angle of the incandescent light bulb than the illumination light source.

  Further, the heat generated in the second light emitting module 32 can be radiated to the outside of the illumination light source 1 via the second heat sink member 21, and the heat generated in the second light emitting module 32 and the first light emitting module 31 can be dissipated. It is possible to suppress the heat generated in step 1 from interfering with each other. For this reason, the heat generated in the second light emitting module 32 and the first light emitting module 31 can be effectively dissipated, and the illumination light source 1 can be easily maintained as designed for heat dissipation.

  In the present embodiment, the height dimension of the second heat sink member 22 is about 5 mm to 20 mm, and the height dimension of the mounting boards 33 and 35 of the first and second light emitting modules 31 and 32 is 0.1 mm to 1. It is set to about 2 mm. The inclination angle of the light reflecting surface 23 of the side surface 22c of the second heat sink member 22 with respect to the first upper surface 21a is preferably 30 ° to 45 °, and the side of the illumination light source 1 and the rear thereof are reflected by the light reflecting surface 23. In order to effectively emit light at an angle of (an angle of 60 ° or more from the front front of the illumination light source 1), 40 ° to 45 ° is more preferable. The inclination angle of the light reflecting surface 23 is preferably set according to the usage application of the illumination light source 1.

  Further, the second mounting substrate 35 of the second light emitting module 32 and the second upper surface 22a of the second heat sink member 22 are joined together, and the first mounting substrate 33 of the first light emitting module 31 and the first heat sink member 21 of the second light emitting module 32 are connected. 1 The upper surface 21a is joined by brazing using, for example, a brazing material, a metal paste (Ag, Au, Cu, solder, etc.) or a metal nano paste (Ag, Au, Cu, etc.), or a heat dissipation grease such as silicone. Or it can carry out by adhere | attaching each other through heat dissipation sheets, such as a graphite.

In the present embodiment, the first and second heat sink members 21 and 22 are divided types each composed of a separate member, but the first and second heat sink members may be integrated. . In the case of the integral type, the number of parts of the heat sink member can be reduced, so that it has an advantage that the parts can be easily managed. However, in the manufacture of the light source for illumination, the second heat sink member replaces the first light emitting module with the first heat sink member. It has the disadvantage of getting in the way of the work to be mounted on. On the other hand, the split type has the disadvantage that the number of components is increased and the management load of the components is increased compared to the integrated type, but the first light emitting module is attached to the first heat sink before the second heat sink member is attached. By mounting on the member, there is an advantage that the operation becomes easy. Therefore, it is preferable to use the split type first heat sink member and second heat sink member from the viewpoint of production.
[Second Embodiment]
Next, the lighting fixture with a reflecting mirror which is the 2nd Embodiment of this invention is demonstrated.
<Outline configuration>
FIG. 9 is a cross-sectional view showing a configuration of the lighting fixture 301 with a reflecting mirror.

As shown in FIG. 9, the reflector-equipped lighting fixture 301 includes an illumination light source 2 and a reflector 310 having a concave light reflection surface 320 that condenses the light from the illumination light source 2 forward. Yes.
The basic configuration of the illumination light source 2 is the same as that of the illumination light source 1 of the first embodiment, and the difference is that the illumination light source 2 does not include a globe for diffusing light. Therefore, the illumination light source 2 includes the first and second heat sink members 21 and 22 and the first and second light emitting modules 31 and 32, and, similarly to the illumination light source 1, an illumination light source using a conventional LED. Rather, it has a light distribution angle closer to that of the incandescent bulb. The same components as those of the illumination light source 1 shown in FIGS. 2 and 3 are denoted by the same reference numerals for the sake of simplicity, and description thereof is omitted.

  The reflector-equipped lighting fixture 301 is used for spot illumination, and can be used, for example, as a substitute for a halogen bulb with a reflector. In conventional halogen light bulbs with a reflecting mirror, light from the light bulb is collected forward by the reflecting mirror, while some light is emitted backward. This backward light is so-called leaked light, and in commercial facilities or the like, the leaked light is actively used to produce a “bright feeling” of the entire space.

In order to approximate the light distribution of such a halogen bulb with a reflector, the light reflector 313 of the lighting fixture with a reflector 301 is provided with a light leakage portion 313 that leaks light to the outside of the reflector.
Below, the structure of the reflective mirror 310 and the light leakage part 313 is demonstrated in detail.
<Configuration of reflector and light leakage part>
As shown in FIG. 9, the reflecting mirror 310 has a bowl shape, the base 311a is fixed to the first heat sink member 21, and the first and second light emitting modules 31, 32 and the second heat sink member 22 are It is arranged in the reflecting mirror 310. A transparent protective cover 318 is attached to the opening 311 d of the reflecting mirror 310.

The reflecting mirror 310 includes a base 311 made of a transparent glass material, a reflecting film X1, and a red filter film X2.
When the surface obtained by extending the second upper surface 22a of the second heat sink member 22 is a virtual plane P, the base 311 includes a rear region 311b between the virtual plane P and the first heat sink member 21, and a virtual plane. A front region 311c between P and the opening 311d. The base 311a is included in the rear region 311b.

  A reflective film X1 is formed in the front region 311c, and a red filter film X2 is formed in the rear region 311b. The reflection film X1 is made of a metal film or a dielectric multilayer film, and reflects light emitted from the first and second light emitting modules 31 and 32. The red filter film X2 is a color filter that is made of a dielectric multilayer film that transmits red light, generates reddish leakage light, and reflects light other than red light. In the reflecting mirror 310, a region where the red filter film X <b> 2 is formed is a light leakage portion 313, and the light leakage portion 313 is arranged in a state of surrounding the first light emitting module 31 and the second heat sink member 22. . The inner peripheral surface of the reflecting mirror 310 formed with the reflecting film X1 and the red filter film X2 constitutes a concave light reflecting surface 320. Such reflection film X1 and red filter film X2 are formed by vacuum deposition, sputtering, ion assist method, or the like.

The light reflecting surface 320 has a curved surface shape that is a part of the spheroid surface C shown in FIG. This spheroidal curved surface C is a spheroidal curved surface obtained by focusing on the two points F1 and F2 on the central axis Y of the lighting fixture 301 with a reflecting mirror and using the central axis Y as the rotational axis. Of the two focal points, the focal point F <b> 1 is the center point O of the light emitting surface 32 a in the second light emitting module 32.
<Relationship between light emitting module and reflector>
In the reflecting mirror 310 configured as described above, a part of the light emitted from the first and second light emitting modules 31 and 32 (arrow L4 in FIG. 9) is reflected by the light reflecting surface 320 and has a reflecting mirror. The light is emitted in front of the lighting fixture 301 (arrow L5). Further, a part of the light emitted from the first light emitting module 31 (arrow L1) is reflected by the light reflecting surface 23 of the second heat sink member 22 and enters the light leakage portion 313 (arrow L2). Of the light incident on the light leaking portion 313, the red light is transmitted through the light leaking portion 313 and emitted at the side and rear angles of the lighting fixture 301 with a reflecting mirror (arrow L6). Red light that passes through the light leakage portion 313 is leakage light. Light other than red light is reflected by the light leakage portion 313 (light reflection surface 320) and emitted to the front of the lighting fixture 301 with a reflecting mirror (arrow L7). In FIG. 9, the incident light on the light reflecting surface 320, the reflected light (arrows L4 and L5), the incident light on the light reflecting surface 23, the reflected light (arrows L1 and L2), and the transmitted light and reflected light on the light leakage portion 313 (arrow L6). , L7) are schematically shown for easy understanding.

  As described above, also in the illumination light source 2 of the present embodiment, a part of the light emitted from the first light emitting module 31 is reflected by the light reflecting surface 23, and the lateral and rear angles of the illumination light source 2 are reflected. Therefore, the light distribution angle of an incandescent bulb such as a halogen bulb can be made closer to that of an illumination light source using a conventional LED. Therefore, in the illuminating device with a reflector 301 provided with the illumination light source 2, the light distribution can be made closer to the halogen light bulb with a reflector as compared with the case where the reflector is attached to the illumination light source using the conventional LED. it can.

  The reflector-equipped lighting fixture 301 having the above-described configuration reflects the light emitted from the first and second light emitting modules 31 and 32 by the light reflecting surface 320 and condenses it forward, and also includes the reflector-equipped lighting fixture 301. It is possible to generate light leaking backward. On the other hand, even if a reflection mirror is attached to an illumination light source using a conventional LED and a light leakage portion is provided in the reflection mirror, light leakage backward is generated because the light distribution angle of the illumination light source is narrow. It is not possible. Moreover, in the lighting fixture 301 with a reflecting mirror, since the light leakage part 313 is distribute | arranged in the state which surrounds the circumference | surroundings of the 1st light emitting module 31 and the 2nd heat sink member 22, it distributes leaked light over the whole circumferential direction. It is possible to increase the substitutability to a halogen bulb with a reflector.

  In addition, in the reflecting mirror 310, the base 311 made of a transparent glass material has translucency, so that a part of the light incident on the light leakage part 313 is guided to the opening 311d side in the base 311. Thus, the opening 311d can emit light. Thereby, a ring-shaped light pattern can be produced on the reflecting mirror 310. Thus, when the base body of a reflective mirror is comprised with a translucent material, the production of the light different from the leak light to the back of a lighting fixture can be performed.

In the present embodiment, similarly to the first embodiment, the lighting state of the lighting fixture 301 with a reflecting mirror is finely set by including the first and second lighting means and the first and second dimming means. be able to. In that case, the lighting of the first light emitting module 31 can be controlled to adjust the brightness of the leaked light to be generated or to be in a state where there is no leaked light.
The light leaking part in the reflecting mirror is not limited to the above configuration, and the configuration of the light leaking part such as shape, size, number and arrangement can be appropriately selected according to the specification or application of the lighting fixture. it can.

Next, a third embodiment having a configuration different from that of the light leakage part 313 of the reflecting mirror 310 will be described.
[Third Embodiment]
<Outline configuration>
FIG. 10 is a side view including a partial cross section showing a configuration of a lighting apparatus 401 with a reflector according to the third embodiment of the present invention.

The lighting fixture 401 with a reflecting mirror of this embodiment is common to the lighting fixture 301 with a reflecting mirror of the second embodiment in that it includes the illumination light source 2 and a reflecting mirror having a light leakage portion. . On the other hand, in the lighting fixture 301 with a reflecting mirror of the second embodiment, the reflecting mirror 310 has a single light leakage portion 313, whereas in the lighting fixture 401 with a reflecting mirror of the present embodiment, the reflecting mirror 410 is provided. Is different in that it has a plurality of light leakage portions 413. In addition, about the same component as the lighting fixture 301 with a reflecting mirror shown in FIG. 9, it shows with the same code | symbol for the sake of simplicity, and the description is abbreviate | omitted.
<Configuration of reflector and light leakage part>
The reflecting mirror 410 includes a bowl-shaped base 411 having a plurality of light leakage portions 413 and a sheet-shaped red filter X3. The base 411 is made of metal, the base 411 a is fixed to the first heat sink member 21, and the first and second light emitting modules 31 and 32 and the second heat sink member 22 are disposed in the reflecting mirror 410. Yes.

The inner peripheral surface of the base 411 is finished in a mirror shape, and a concave light reflecting surface 420 is formed. The base body 411 includes a rear region 411b between the virtual plane P and the first heat sink member 21, and a front region 411c between the virtual plane P and the opening 411d.
A plurality of through holes penetrating the inside and outside of the base body 411 are formed in the rear region 411b, and each through hole constitutes a light leakage portion 413. Further, a red filter X3 is attached to the rear region 411b so as to seal each light leakage portion 413.

The plurality of light leakage portions 413 are configured by three types of light leakage portions 413a, 413b, and 413c having different diameter dimensions, and a predetermined interval is provided in the circumferential direction of the reflecting mirror 410 for each of the light leakage portions 413a, 413b, and 413c. Is arranged.
The red filter X3 is made of, for example, a pigment-based color filter formed by applying a pigment to an organic film, and transmits red light and absorbs light other than red. Light that passes through the red filter X3 and is emitted from the light leakage portion 413 to the outside of the reflecting mirror is leakage light. Also in this embodiment, reddish leakage light can be generated. The red filter X3 also functions to prevent foreign matters such as moisture and dust from entering the reflecting mirror from entering the reflecting mirror.

The light reflecting surface 420 has a curved surface shape that is a part of a spheroidal curved surface, similar to the light reflecting surface 320 of FIG.
<Relationship between light emitting module and reflector>
In the reflecting mirror 410 configured as described above, a part of the light emitted from the first light emitting module 31 (arrow L1 in FIG. 10) is reflected by the light reflecting surface 23 of the second heat sink member 22, and the base body. It enters the rear region 411b of 411 (arrow L2). Of the light incident on each light leakage portion 413 in the rear region 411b, the red light is transmitted through the red filter X3 and each light leakage portion 413, and is emitted to the side and rear angles of the lighting fixture 401 with a reflector. (Arrow L8). The red light that passes through each light leakage portion 413 is leakage light. Light other than red incident on each light leakage portion 413 is absorbed by the red filter X3. The light incident on the region other than each light leakage portion 413 in the rear region 411b is reflected by the light reflecting surface 420 and emitted to the front of the lighting fixture 401 with a reflecting mirror (arrow L9). In FIG. 10 also, incident light on the light reflecting surface 23, reflected light (arrows L1 and L2), transmitted light (arrow L8) in the light leaking portion 413, and reflected light (arrow L9) in the rear region 411b of the base 411, It is schematically shown for easy understanding.

In the lighting fixture 401 with a reflecting mirror having the above-described configuration, the plurality of light leakage portions 413 are arranged at predetermined intervals in the circumferential direction of the reflecting mirror 410 and surround the first light emitting module 31 and the second heat sink member 22. The light distribution of leakage light can be made symmetrical in the circumferential direction, and the substitutability to the halogen bulb with a reflector can be enhanced.
Moreover, in the lighting fixture 401 with a reflecting mirror, since the base body 411 of the reflecting mirror 410 is made of metal and fixed to the first heat sink member 21, the heat generated in the first and second light emitting modules 31 and 32. Can be effectively radiated by the base 411.

  In the present embodiment, the configuration in which the plurality of light leakage portions 413 includes three types of light leakage portions has been described. However, the configuration of the number, shape, size, arrangement, and the like of the light leakage portions depends on the specifications of the lighting fixture or It can select suitably according to a use. Moreover, in the lighting fixture with a reflector 401, the configuration can be selected for each light leakage portion, so that the light distribution of the leakage light can be adjusted more finely compared with the lighting fixture with a reflector 301.

Moreover, although the structure in which the sheet-like red filter X3 is attached to the light leakage portion 413 is shown, the light leakage portion 413 may be left open depending on the specification or application of the lighting fixture. Conversely, a light-transmitting material such as a resin may be embedded in the through-hole that configures the light leakage portion 413. As mentioned above, although the light source for illumination which concerns on this invention, and the lighting fixture with a reflector using the same was demonstrated based on embodiment, this invention is not limited to these embodiment.
[Modification]
Next, a modification of the above embodiment will be described. In addition, the same code | symbol is attached | subjected to the component similar to the light source 1 for illumination in the said embodiment, and those description is abbreviate | omitted for simplicity.
<1> The second heat sink member having an inverted truncated cone shape is not limited to the configuration of the above embodiment. For example, as in the second heat sink member 82 shown in FIG. 11, the side surface 82 c is on the second lower surface 82 b side. It is good also as a structure which consists of the curvilinear shape which gradually protrudes to a radial direction outer side as it goes to the edge part by the side of the 2nd upper surface 82a from an edge part. The side surface 82c has a shape that is recessed inward from a straight line connecting the end portion on the second lower surface 22b side and the end portion on the second upper surface 22a side, and constitutes a light reflecting surface 83 that reflects light. By projecting the second heat sink member 82 from above in the vertical direction, a projection area 84 is obtained on the first upper surface 21 a of the first heat sink member 21, and the radial direction of the first light emitting unit 34 is provided in the projection area 84. There is an inner area. In this way, by tilting the light reflecting surface 83 in the curved shape, the light reflected by the light reflecting surface 83 is emitted in a concentrated manner on the side and rear angles of the illumination light source and in a specific direction. Can be illuminated more brightly. In addition, this modification is not limited to the light source for illumination provided with the globe as shown in FIG. 11, It can apply also to the light source for illumination in the lighting fixture with a reflecting mirror.
<2> The first heat sink member is not limited to the configuration of the above embodiment. For example, as in the first heat sink member 101 shown in FIG. 12, the first upper surface 101a has a flat central portion and a tapered shape. It is good also as a structure which consists of the formed peripheral part. In this case, on the first upper surface 101a, the second heat sink member 102 can be disposed in the central portion, and the first light emitting module 111 formed in a conical shape in the peripheral portion can be disposed. Further, the side surface 102 c of the second heat sink member 102 constitutes the light reflecting surface 103. By projecting the second heat sink member 102 in the vertical direction from above, a projection area 104 is obtained on the first upper surface 101 a of the first heat sink member 101, and the first light emitting module 111 of the first light emitting module 111 is located in the projection area 104. A region on the radially inner side of the light emitting unit 114 exists. That is, a radially inner region (inner edge) of the conical light emitting surface formed by the upper surface of the first light emitting unit 114 exists in the projection area 104.

  In such a first light emitting module 111, a part of the emitted light from the first light emitting unit 114 is reflected by the light reflecting surface 103 and emitted to the side and the rear side of the illumination light source, and the conical surface. The light emitted from the first light emitting unit 114 is emitted to the side and the rear side of the illumination light source by the amount of the first light emitting module 111 having a shape inclined in the front oblique direction. Thereby, the light distribution characteristic in the back in the whole light source for illumination can be improved.

In addition, a plurality of light emitting modules can be used instead of the first light emitting module 111. In this case, each light emitting module is arranged along the circumferential direction of the projection area 104 on the first upper surface 101 a so that at least a partial area of each light emitting surface of the plurality of light emitting modules exists in the projection area 104. It is preferable to arrange them at predetermined intervals.
In addition, this modification is not limited to the light source for illumination provided with the globe as shown in FIG. 12, It can apply also to the light source for illumination in the lighting fixture with a reflecting mirror.
<3> The second heat sink member is not limited to an inverted truncated cone shape, and an inverted polygonal truncated cone shape can be used. For example, as shown in FIG. 13, it is good also as the 2nd heat sink member 122 which consists of an inverted quadrangular frustum shape. In this case, the first light emitting module 131 formed in a quadrangular annular shape can be used in accordance with the shape of the second heat sink member 122. Further, the four side surfaces 122c of the second heat sink member 122 constitute a light reflecting surface 123 that reflects light. By projecting the second heat sink member 122 from above in the vertical direction, a projection area 124 is obtained on the first upper surface 21 a of the first heat sink member 21. As long as at least a part of the first light emitting unit 134 of the first light emitting module 131 exists in the projection area 124, a part of the light emitted from the first light emitting unit 134 is reflected by light. The light can be reflected by the surface 123 and emitted at the side and rear angles of the illumination light source. In the present modification, the first light emitting module 131 has a square annular light emitting surface constituted by the upper surface of the first light emitting unit 134, and the region (inner edge) inside this light emitting surface is within the projection area 124. Existing.

In addition, a plurality of light emitting modules can be used instead of the first light emitting module 131. In this case, each light emitting module is arranged along the outer peripheral shape of the projection area 124 on the first upper surface 21 a so that at least a partial area of each light emitting surface of the plurality of light emitting modules exists in the projection area 124. It is preferable to arrange them at predetermined intervals.
<4> Furthermore, it is good also as a structure which consists of a shape which piled up the inverted truncated cone-shaped member 2 steps | paragraphs like the 2nd heat sink member 142 shown in FIG. The second heat sink member 142 includes an upper step 143 and a lower step 145, a second light emitting module 152 having a square shape is formed on the upper surface 143 a of the upper step 143, and a third annular shape is formed on the upper surface 145 a of the lower step 145. The light emitting modules 153 are respectively arranged. The first light emitting module 31 is disposed on the first upper surface 21 a of the first heat sink member 21. Further, the side surface 143c of the upper step portion 143 forms a light reflection surface 144, and the side surface 145c of the lower step portion 145 forms a light reflection surface 146. By projecting the upper stage 143 from above in the vertical direction, a projection area 147 is obtained on the upper surface 145a of the lower stage 145. Similarly, a projection region 148 is obtained on the first upper surface 21 a of the first heat sink member 21 by projecting the lower step portion 145. A region inside the radial direction of the third light emitting module 153 exists in the projection region 147, and a region inside the radial direction of the first light emitting module 31 exists in the projection region 148.

In this case, each of the light reflecting surfaces 144 and 146 can be formed in a different inclined shape, so that the emission area of each reflected light can be individually adjusted. Therefore, the illumination light source according to the modification has a plurality of light reflection surfaces 144 and 146, so that the emission region can be adjusted more finely than the illumination light source 1 having one light reflection surface 23. it can. Thereby, since the light distribution in the illumination light source can be made more uniform, it is possible to achieve illumination with less brightness unevenness. In addition, this modification is not limited to the light source for illumination provided with the globe as shown in FIG. 14, It can apply also to the light source for illumination in the lighting fixture with a reflecting mirror.
<5> FIG. 15 is a schematic view showing another modification of the second heat sink member. In FIG. 15, a first heat sink member 200 and second heat sink members 201 to 205 are shown, and other components are omitted for simplicity.

  The second heat sink member 201 shown in FIG. 15A has an inverted oblique truncated cone shape in which the inclination angle of the side surface varies depending on the position in the circumferential direction, and the predetermined range in the circumferential direction (part of the circumferential direction) has a particularly large inclination. It has a shape. In addition, the second heat sink member 201 is disposed at a position shifted from the central portion of the upper surface of the first heat sink member 200 so that the side of the upper surface of the first heat sink member 200 having the inclined side surface becomes wider.

  The second heat sink member 202 shown in FIG. 15B is, in order from the first heat sink member 200 side, a first column portion, an inverted truncated cone portion, and a second column having a larger diameter than the first column portion. And have a part. In the second heat sink member 202, a certain range in the height direction of the side surface (a part in the height direction), that is, the side surface in the inverted truncated cone portion is formed to be inclined over the entire circumferential direction.

  The second heat sink member 203 shown in FIG. 15C has a truncated cone portion and an inverted truncated cone portion in order from the first heat sink member 200 side. By providing the truncated cone part in this way, the side surface of the inverted truncated cone part is illuminated as compared with a second heat sink member made of only the inverted truncated cone part having the same height, for example, the second heat sink member 22 shown in FIG. It can be inclined by the rear side of the light source.

  The second heat sink member 204 shown in FIG. 15 (d) is parallel to one side surface inclined with respect to the vertical direction of the quadrangular prism portion and the upper surface of the first heat sink member 200 in order from the first heat sink member 200 side. And an inverted oblique pyramid frustum portion formed of two side surfaces. In addition, the second heat sink member 204 is disposed at a position shifted from the central portion of the upper surface of the first heat sink member 200 so that the side of the upper surface of the first heat sink member 200 with the inclined side surface becomes wider.

  The second heat sink member 205 shown in FIG. 15E is larger than the area of the top surface of the first quadrangular prism portion, the inverted quadrangular frustum portion, and the first quadrangular prism portion in order from the first heat sink member 200 side. A second quadrangular prism portion having an upper surface with an area. In the second heat sink member 205, a certain range in the height direction of the side surface (a part in the height direction), that is, four side surfaces in the inverted square frustum portion are formed to be inclined. In FIGS. 15D and 15E, the second heat sink members 204 and 205 having an inverted quadrangular frustum shape are shown as an example of a modification of the second heat sink member having an inverted polygon frustum shape.

Thus, in the second heat sink member, a part of the side surface in the circumferential direction, a part in the height direction, or a combination of these can be inclined. In this case, in the range of the inclined side surface, the reflected reflected light can be emitted to the side and rear angles of the illumination light source, and the light distribution angle can be expanded. It is preferable to form the shape of the second heat sink member according to the use application of the light source. That is, the “inverted frustum shape” described in the claims is not limited to the shape in which the entire side surface is inclined, but a part of the side surface (circumferential direction, height direction, or a combination thereof) is inclined. It is also included in the shape.
<6> Moreover, in the said embodiment, although the 1st light emitting module 31 consists of one annular light emitting module, it is good also as a structure which consists of a some light emitting module. In this case, the plurality of light emitting modules are arranged at predetermined intervals along the circumferential direction of the projection area 24, and at least a part of the plurality of light emitting modules is arranged in the projection area 24. Thus, the same effect as that of the first light emitting module 31 in the above embodiment can be obtained. Thus, in this modification, since it is not necessary to manufacture an annular light emitting module specially, it is easier to manufacture the light emitting module than the first light emitting module 31 in the above embodiment.

The “state in which at least a part of the plurality of light emitting modules is present in the projection area 24” refers to a state in which some of the light emitting modules are present in the projection area 24, or A state in which a partial area of each light emitting module exists in the projection area 24 is shown. This is because, among the light emitting surfaces of a plurality of light emitting modules, the light emitting surfaces of some of the light emitting modules exist in the projection area 24, or at least some areas of each light emitting surface exist in the projection area 24. It means that
<7> Furthermore, in the said embodiment, although the 2nd light emitting module 32 is square shape, according to the surface shape of the 2nd upper surface 22a of the 2nd light emitting module 32, a 2nd light emitting module is made circular. It may be formed. In this case, the second light emitting module can be disposed on the entire second upper surface 22a of the second heat sink member 22, and the area where the second light emitting module is not disposed on the second upper surface 22a is eliminated. Lighting with less unevenness can be obtained.
<8> In the above embodiment, the second light emitting module 32 includes one light emitting module, but the second light emitting module may include a plurality of light emitting modules. In this case, on the second upper surface 22a of the second heat sink member 22, the light emitting modules are arranged side by side in accordance with the surface shape of the second upper surface 22a, whereby the second light emission on the second upper surface 22a. The area where the module is not arranged can be reduced. For this reason, even if it does not manufacture the 2nd light emitting module especially according to the surface shape of the 2nd upper surface 22a, it can be set as illumination with less brightness nonuniformity.
<9> In the above embodiment, each of the light emitting units 34 and 36 is a combination of a blue LED as a light emitting element and a yellow phosphor material as a wavelength conversion material, but is not limited thereto. For example, a combination of an ultraviolet light emitting diode and phosphors emitting three primary colors (red, green, and blue) can be used. Further, a light emitting transistor or an organic EL (Electro Luminescence) may be used. Furthermore, a material containing a substance that emits light having a wavelength different from the light absorbed and absorbed, such as a semiconductor, a metal complex, an organic dye, or a pigment, may be used as the wavelength conversion material.
<10> In the second and third embodiments, the configuration in which the light leakage portion is provided in the reflecting mirror has been shown. However, when the light leakage is unnecessary in the specification or application of the lighting fixture, the light leakage to the reflecting mirror It can be set as the structure which does not provide a part.
<11> In the second and third embodiments, a configuration in which reddish leakage light is generated using a red filter film or a sheet-like red filter in order to approximate the color of the leakage light in the halogen light bulb with a reflector. However, it does not limit the color of the leaked light. The configuration of the color filter can be appropriately selected according to the specification or application of the lighting fixture.
<12> In the second and third embodiments, a configuration in which the base of the reflecting mirror is made of a transparent glass material or a metal is used. It can select suitably according to a use. For example, in the substrate, a light transmitting member may be used for a portion constituting the light leakage portion, and a reflecting member may be used for a portion other than the light leakage portion. As the translucent member, a translucent material of any one of glass, ceramic and resin, or a combination thereof, and as a reflecting member, a metal, a non-translucent ceramic, or the like can be used.
<13> It is good also as a structure which performed the light-diffusion process in the light leak part in 2nd Embodiment. By performing the light diffusion process, the leaked light can be emitted uniformly without any brightness unevenness.
<14> FIG. 16 shows, as an example of a modification, a reflector-equipped luminaire 501 provided with a sub-reflector 530 in addition to the reflector 510 in order to actively increase the leakage light in the luminaire. ing.

  A sub-reflecting mirror 530 shown in FIG. 16 is a reflecting mirror that reflects the light emitted from the first light emitting module 31 and emits it to the rear of the lighting fixture 501 with a reflecting mirror. The sub-reflecting mirror 530 is made of a metal disk-like member, and a through hole 530a is formed at the center. One surface 531 of the sub-reflecting mirror 530 constitutes a light reflecting surface. The sub-reflecting mirror 530 is attached in the reflecting mirror 510 so that the light reflecting surface 531 is arranged in front of the first light emitting module 31 and the second light emitting module 32 exists in the through hole 530a. .

Thus, by providing the sub-reflecting mirror 530 in the reflecting mirror 510, the light (arrow L3) emitted from the first light emitting module 31 is reflected by the sub-reflecting mirror 530 toward the rear light leakage portion 513 ( Since the arrow L10) can be generated, more leakage light (arrow L11) can be generated. Also in FIG. 16, the incident light on the light reflecting surface 531, the reflected light (arrows L 3 and L 10), and the transmitted light (arrow L 11) in the light leakage part 513 are schematically shown for easy understanding.
<15> Moreover, the lighting fixture with a reflector of this invention can also be set as the structure provided with the light source for illumination provided with the globe like the light source 1 for illumination, and the reflective mirror.

  The present invention can be widely used in general lighting.

DESCRIPTION OF SYMBOLS 1, 2 Illumination light source 11 Case 12 E-type base 13 Lighting circuit 14 Globe 15 Circuit board 16 Electronic component 17 Storage chamber 21, 101 1st heat sink member 21a, 101a 1st upper surface 22, 82, 102, 122, 142 2nd Heat sink member 22a, 82a Second upper surface 22c, 82c, 102c, 122c, 143c, 145c Side surface 23, 83, 103, 123, 144, 146 Light reflecting surface 24, 84, 104, 124, 147, 148 Projection area 31, 111 131 First light emitting module 32, 152 Second light emitting module 33, 113, 133 First mounting substrate 34, 114, 134 First light emitting portion 35 Second mounting substrate 36 Second light emitting portion 143, 145 Inverted truncated cone portion 143a, 145a Upper surface 153 Third light emitting module 301, 401 Lighting fixtures with reflectors 310 and 410 Reflectors 311 and 411 Bases 313 and 413 Light leaking portions 320 and 420 Light reflecting surfaces F1 and F2 Focus X1 Reflective film X2 Red filter film X3 Red filter

Claims (16)

  1. A light source for illumination in which a plurality of light emitting modules are mounted on a base,
    The base is composed of a first base part and a second base part protruding in the shape of an inverted frustum from the central part of the upper surface of the first base part,
    The plurality of light emitting modules include at least one first light emitting module disposed on an upper surface of the first base portion, and at least one second light emitting module disposed on an upper surface of the second base portion. Consisting of
    In the case where the projection of the second base plate part from above into the first base plate portion, there is a part of the light-emitting surface of the at least one first light emitting module to the projection region, the light emitting surface in the projection outside The rest of
    An illumination light source, wherein a side surface of the second base portion constitutes a light reflection surface.
  2. The second base part has a circular shape when viewed from above;
    The first light emitting module is singular and has an annular light emitting surface,
    The illumination light source according to claim 1, wherein an inner edge portion of the light emitting surface exists in the projection area.
  3. The second base part has a circular shape when viewed from above;
    There are a plurality of the first light emitting modules, and each light emitting surface is arranged at predetermined intervals along the circumferential direction of the projection area, and at least a part of each light emitting surface exists in the projection area. The illumination light source according to claim 1.
  4. The second base portion has a polygonal shape as viewed from above,
    The first light emitting module is singular and has a polygonal annular light emitting surface,
    The illumination light source according to claim 1, wherein an inner edge portion of the light emitting surface exists in the projection area.
  5. The second base portion has a polygonal shape as viewed from above,
    There are a plurality of the first light emitting modules, and each light emitting surface is arranged at a predetermined interval along the outer peripheral shape of the projection area, and at least a part of each light emitting surface exists in the projection area. The illumination light source according to claim 1.
  6. The first light emitting module includes a plurality of light emitting elements,
    2. The illumination light source according to claim 1, wherein a part of the plurality of light emitting elements exists in the projection area, and the remaining light emitting elements exist outside the projection area.
  7. 2. The plurality of first light emitting modules, and the plurality of first light emitting modules are arranged side by side in accordance with the shape of the upper surface of the first base portion. Light source for lighting.
  8. The second light emitting module is singular, and the second light emitting module has a mounting surface to be mounted on the second base part,
    2. The illumination light source according to claim 1, wherein the mounting surface is formed in accordance with a shape of an upper surface of the second base portion.
  9. The plurality of second light emitting modules, and the plurality of second light emitting modules are arranged side by side in accordance with the shape of the upper surface of the second base part. Light source for lighting.
  10. Each of the first and second light emitting modules includes a plurality of light emitting elements,
    2. The illumination light source according to claim 1, wherein a total number of the light emitting elements in the second light emitting module is greater than a total number of the light emitting elements in the first light emitting module.
  11. The light source for illumination according to claim 1, wherein the base is made of a metal material.
  12. The light source for illumination according to claim 1, wherein the light reflecting surface of the second base part is finished to be a mirror surface or a diffusing surface.
  13. The illumination light source according to claim 1, wherein the first base part and the second base part are configured separately.
  14. The illumination light source further includes a power supply base that receives external power supply;
    A lighting circuit that is inserted in a power supply path between the power supply base and the first and second light emitting modules, and controls the lighting of the first and second light emitting modules;
    A glove covering the first and second light emitting modules,
    The illumination light source according to claim 1, wherein the base constitutes a heat sink that dissipates heat generated in the first and second light emitting modules.
  15. The lighting circuit includes first lighting means for controlling lighting of only the first light emitting module, and second lighting means for controlling lighting of only the second light emitting module. 14. A light source for illumination according to 14.
  16. The lighting circuit includes first dimming means for adjusting the dimming level of the first light emitting module, and second dimming means for adjusting the dimming level of the second light emitting module. The illumination light source according to claim 14.
JP2009176684A 2008-09-04 2009-07-29 Light source for illumination Active JP4755276B2 (en)

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