JP2016091745A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire which inhibits enlargement and color shading.SOLUTION: A luminaire includes: a reflection part; and a light emitting module 14. The reflection part includes a recessed reflection surface which reflects and emits light. The light emitting module 14 includes: a columnar support medium 31; a light emitting element 32; and a sealing part 33. The support medium 31 is disposed in the reflection part along an optical axis direction. The light emitting element 32 is disposed on a side surface 31a of the support medium 31. The sealing part 33 has light transmissivity and integrally covers the light emitting element 32.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a lighting device including light emitting elements respectively disposed on respective side surfaces of a polygonal columnar support disposed along an optical axis direction.

  Conventionally, for example, there is a halogen bulb with a reflector used for a downlight or a spotlight. In recent years, for the purpose of power saving and long life, it has been replaced with a lighting device using a light emitting element such as a light emitting diode.

  Although such a lighting device has been studied to reduce the mounting area of the light emitting element as it is miniaturized, there is a limit to simply reducing the mounting area, and in recent years, the light emitting element is supported in a polygonal column shape. A light emitting module having a three-dimensional arrangement structure arranged on the side surface of the body is employed.

  However, since the light emitting element has a light distribution, color unevenness occurs in the case of the above three-dimensional arrangement. In this respect, although the color unevenness can be suppressed by increasing the number of corners of the polygon of the support, the light emitting module is increased in size.

  In addition, when the light emitting elements are three-dimensionally arranged, the heat dissipation path is restricted, which is thermally disadvantageous, and the characteristics may be deteriorated.

Registered Utility Model No. 3169011 Japanese Patent No. 4469411

  The problem to be solved by the present invention is to provide an illumination device capable of suppressing color unevenness while suppressing enlargement.

  The illuminating device of embodiment is provided with a reflection part and a light emitting module. The reflecting portion includes a concave reflecting surface that reflects and emits light. The light emitting module includes a columnar support, a light emitting element, and a sealing portion. A support body is arrange | positioned along an optical axis direction inside a reflection part. A light emitting element is arrange | positioned at the side surface of a support body. The sealing portion has translucency and integrally covers the light emitting element.

  According to the present invention, by covering a plurality of light emitting elements integrally with the same sealing portion, the emitted light from the light emitting elements is diffused by the sealing portion while suppressing an increase in size, and color unevenness is suppressed. I can expect that.

It is sectional drawing which shows the light emitting module of the illuminating device of 1st Embodiment. It is a top view which shows the light emitting module of an illuminating device same as the above from an optical axis direction. (a) is sectional drawing of an illuminating device same as the above, (b) is a perspective view which shows a part of illuminating device same as the above. It is sectional drawing which shows the light emitting module of the illuminating device of 2nd Embodiment. It is a top view which shows a light emitting module same as the above from an optical axis direction. It is sectional drawing which shows the light emitting module of the illuminating device of 3rd Embodiment. It is a top view which shows a light emitting module same as the above from an optical axis direction. It is sectional drawing which shows the light emitting module of the illuminating device of 4th Embodiment. It is a top view which shows a light emitting module same as the above from an optical axis direction. It is sectional drawing which shows the light emitting module of the illuminating device of 5th Embodiment. It is explanatory drawing which shows typically the light distribution of the light emitting element of an illuminating device same as the above. It is sectional drawing which shows the light emitting module of the illuminating device of 6th Embodiment. It is sectional drawing which shows the light emitting module of the illuminating device of 7th Embodiment. It is sectional drawing which shows the light emitting module of the illuminating device of 8th Embodiment. It is sectional drawing which shows typically the illuminating device of 9th Embodiment. It is sectional drawing which shows typically the illuminating device of 10th Embodiment.

  The configuration of the first embodiment will be described below with reference to FIGS.

  In FIG. 3 (a), reference numeral 11 denotes an illuminating device, and this illuminating device 11 is used, for example, as an alternative to a conventional halogen bulb.

  As shown in FIGS. 3 (a) and 3 (b), the illuminating device 11 includes a main body portion 12, a reflecting portion 13 attached to the main body portion 12, and light emission located inside the reflecting portion 13. The module 14 includes a cover 15 (shown only in FIG. 3A) attached to the reflecting portion 13, and a base 16 attached to the main body portion 12. Hereinafter, the light emission direction from the illumination device 11 is used as a reference, the light emission side is defined as the front side or the front side in the optical axis direction, and the opposite side is defined as the rear side or the rear side in the optical axis direction.

  The main body portion 12 includes a storage portion 21 and a connection portion 22. The main body 12 is made of, for example, a material having high thermal conductivity and insulating properties. As a material constituting the main body 12, for example, a ceramic such as aluminum nitride (AlN), or a high thermal conductive resin can be used, for example, aluminum (Al), copper (Cu), or an alloy thereof. It is also possible to provide an insulating layer on the surface of the metal.

  The storage unit 21 is formed in a cylindrical shape, for example. A lighting circuit (not shown) that supplies power to the light emitting module 14 is housed inside the housing portion 21. Note that, for example, a dimming circuit for dimming the light emitting module 14 can be further housed in the housing portion 21.

  The connection part 22 is provided at one end of the storage part 21 that is opposite to the side on which the reflection part 13 is provided. The connecting portion 22 is reduced in diameter so that the cross-sectional area becomes smaller toward the base 16.

  The reflecting portion 13 is also called an optical reflector, and is made of, for example, hard glass, heat resistant synthetic resin, metal, or the like. The reflecting portion 13 is formed by expanding the diameter so that the cross-sectional area gradually decreases from the end on the main body 12 (storage portion 21) side, which is the rear side in the optical axis direction, toward the end on the front side in the optical axis direction. In addition, a concave reflecting surface 25 having a focal point, such as a rotating paraboloid or a spheroid, is provided inside. A reflection film (not shown) that reflects light and heat is provided on the surface of the reflection surface 25. This reflective film is made of, for example, chromium (Cr). Further, the rear side of the reflecting portion 13 in the optical axis direction is inserted into the storage portion 21 and is fixed to the storage portion 21 (main body portion 12) by bonding or the like, and the front side in the optical axis direction is opened and the cover 15 is opened. It is blocked by.

  The light-emitting module 14 shown in FIGS. 1 to 3 includes a support 31, a plurality of light-emitting elements 32 mounted on the support 31, and a sealing portion 33 that covers and seals all the light-emitting elements 32 integrally. have.

  The support 31 is formed in a columnar shape having a polygonal cross section in a direction orthogonal to the axial direction, that is, a polygonal column shape. In the present embodiment, the support 31 has a quadrangular prism shape and a straight column shape (FIG. 2). For this reason, the support 31 has four side surfaces 31a having a long and narrow rectangular shape along the axial direction. The support 31 is made of a material having a high thermal conductivity and a certain degree of rigidity. For example, the support 31 can be formed of a ceramic such as aluminum nitride, a high thermal conductive resin, aluminum, copper, or a metal such as an alloy thereof. Therefore, the support 31 is a heat radiating part (heat sink) that radiates heat from the light emitting element 32. Further, the support 31 has an end on the rear side in the optical axis direction held by, for example, the storage portion 21 (main body portion 12), and the front portion in the optical axis direction faces the inside of the reflection portion 13 (the main body portion 12). ). The support 31 is disposed along the optical axis of the illuminating device 11 that serves as the rotation axis of the reflecting surface 25. Further, for example, when the diameter of the front end of the reflecting portion 13 in the optical axis direction, that is, the maximum diameter is about 50 mm, the support 31 has a width (short dimension) of the side surface 31a of about 4 to 5 mm. Is formed.

  As the light emitting element 32, for example, a semiconductor light emitting element such as an LED or an organic EL element is used. In the present embodiment, these light emitting elements 32 emit white light. At least one of these light emitting elements 32 is mounted on each side surface 31a of the support 31, and is thermally connected to the support 31 (side 31a). The number and arrangement of the light emitting elements 32 on each side surface 31a are not particularly limited, and can be arbitrarily set according to the light emission intensity and size of the light emitting elements 32. In the present embodiment, for example, a support is used. 31 along the axial direction (optical axis direction) of the support 31 at the front end side of each side surface 31a, that is, in the vicinity of the end portion on the opposite side of the main body 12 (housing portion 21) in the axial direction of the support 31. It is mounted in a state where a plurality of lines are linearly spaced apart at substantially equal intervals. For example, when the diameter dimension of the front end of the reflecting portion 13 in the optical axis direction, that is, the maximum diameter dimension is about 50 mm, these light emitting elements 32 are, for example, 5 to 6 mm along the axial direction (optical axis direction) of the support 31. Arranged in the area. Therefore, the illumination device 11 has a structure in which the light emitting elements 32 are arranged in three dimensions. In addition, these light emitting elements 32 are electrically connected to the lighting circuit through wirings not shown.

  The sealing portion 33 is formed in a spherical shape with a synthetic resin having translucency. In the present embodiment, the sealing portion 33 is formed of a synthetic resin such as colorless and transparent silicone, and is formed on the support 31 on which the light emitting element 32 is mounted, for example, by a method such as molding. The position of the sealing portion 33 is not limited as long as all the light emitting elements 32 can be integrally sealed, but preferably the end portion of the support 31 opposite to the main body portion 12 (housing portion 21) in the axial direction. And the center axis (optical axis) of the support 31 passes through the center, and the light emitting element 32 is positioned near the center. Therefore, the sealing portion 33 is a rotating body. The larger the diameter of the sealing portion 33 (the larger the relative size with respect to the mounting region of the light emitting element 32), the light extraction efficiency is improved. On the other hand, when the diameter is too large, the reflected light from the reflecting surface 25 is reduced. Since there is a possibility that the emission may be hindered, for example, when the diameter dimension of the front end of the reflecting portion 13 in the optical axis direction, that is, the maximum diameter dimension is about 50 mm, the upper limit is about 10 mm and the size is not in contact with the reflecting surface 25. desirable.

  The cover 15 is formed in a plate shape from a material having translucency, for example, and is fitted to the front end portion of the reflecting portion 13. The cover 15 may have an optical function such as a lens or a prism, or may not have an optical function. The cover 15 is not an essential configuration.

  The base 16 has a shell portion 37 and an eyelet portion 38 formed of a conductive material such as metal, for example, and has a shape similar to, for example, the E11 shape defined in the JIS standard. The base 16 is not limited to this shape, and can have an appropriate shape.

  The shell portion 37 is a cylindrical body having a thread and is provided on the outer peripheral surface of the connection portion 22. The eyelet part 38 is provided at the end of the connection part 22. The shell part 37 and the eyelet part 38 are electrically connected to the lighting circuit via a wiring (not shown).

  Next, the operation of the first embodiment will be described.

  When the base 16 of the lighting device 11 is screwed into a socket (not shown) provided at the installation position such as the ceiling, the base 16 is electrically connected to an external power source, and power is supplied to the lighting circuit from the external power source through the base 16. Is done. The lighting circuit lights the light emitting elements 32 by supplying a constant current to the light emitting elements 32, for example. The emitted light from the light emitting element 32 is emitted from the sealing portion 33 in a state of being diffused and uniformed by the sealing portion 33, most of the light is reflected by the reflecting surface 25 of the reflecting portion 13, and the remaining part is The light is emitted from the sealing portion 33 directly to the outside of the illumination device 11 through the cover 15 along the optical axis direction. As a result, substantially circular projection light in which color unevenness is suppressed is formed.

  In this way, by forming the sealing portion 33 that integrally covers all the light emitting elements 32 into a spherical shape, total reflection at the interface of the sealing portion 33 can be suppressed, and light extraction efficiency can be further improved.

  The heat generated from the light emitting elements 32 is radiated by the support 31 thermally connected to the light emitting elements 32 and the sealing portion 33 covering the light emitting elements 32, and the light emission efficiency of the light emitting elements 32 is reduced due to heat generation. Can be suppressed.

  In the first embodiment, as in the second embodiment shown in FIGS. 4 and 5, the support 31 can be formed in a hexagonal column shape. In this case, dark portions are less likely to be generated in the light emitted from the light emitting elements 32 mounted on the respective side surfaces 31a, color unevenness can be further suppressed, and the shape of the projection light can be easily made circular.

  Next, a third embodiment will be described with reference to FIGS. In addition, about the structure and effect | action similar to the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the third embodiment, the sealing portion 33 is formed in a truncated cone shape. That is, the sealing portion 33 has a rotating body shape having a rotation axis along the optical axis direction, and is formed so as to gradually increase in diameter from the rear side in the optical axis direction toward the front side. The side surface of the sealing portion 33 is an emission surface 41 that faces the reflection surface 25 and is inclined with respect to the optical axis direction. That is, the emission surface 41 is inclined such that the normal direction is directed to the rear side in the optical axis direction.

  The emitted light from each light emitting element 32 lit by the lighting circuit is emitted from the sealing portion 33 while being diffused and uniformed by the sealing portion 33, and most of the light is emitted from the emission surface 41 toward the reflection surface 25. And is reflected by the reflecting surface 25 and is emitted to the outside of the illumination device 11 through the cover 15. As a result, substantially circular projection light in which color unevenness is suppressed is formed.

  In this way, the sealing portion 33 that integrally covers all the light emitting elements 32 is provided with the emission surface 41 that faces the reflection surface 25 and is inclined with respect to the optical axis direction, and has a rotation axis along the optical axis direction. By forming the body shape, the light emitted from the light emitting element 32 through the sealing portion 33 can be efficiently irradiated from the emitting surface 41 to the reflecting surface 25, and the reflecting portion from the light emitting element 32 through the sealing portion 33 can be irradiated. Since the emitted light directly emitted from the front end opening (cover 15) of 13 is suppressed, the external emission can be easily controlled by the reflecting surface 25 of the reflecting portion 13, and the uniformity of the irradiated surface can be improved.

  In the third embodiment, the support 31 can be formed in a hexagonal column shape as in the fourth embodiment shown in FIGS. In this case, dark portions are less likely to be generated in the light emitted from the light emitting elements 32 mounted on the respective side surfaces 31a, color unevenness can be further suppressed, and the shape of the projection light can be easily made circular.

  Next, a fifth embodiment will be described with reference to FIGS. In addition, about the structure and effect | action similar to said each embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the fifth embodiment, each light emitting element 32 emits radiated light whose peak wavelength is a predetermined wavelength, in this embodiment, blue light. At least one type of phosphor 45 excited by the emitted light and a diffusion material 46 that diffuses the emitted light from each light emitting element 32 are mixed.

  Each light emitting element 32 emits light L having a Lambertian light distribution (FIG. 11). Therefore, the light emitting element 32 as a whole has the maximum strength in the direction orthogonal to the side surfaces 31a of the support 31, that is, the direction orthogonal to the optical axis direction (the axial direction of the support 31). On the other hand, the strength in the side surface direction parallel to the optical axis direction (the axial direction of the support 31) is relatively small.

  As the phosphor 45, for example, a YAG phosphor can be used. The phosphor 45 is excited by blue emitted light from the light emitting element 32, and emits a peak wavelength different from the excitation wavelength, that is, yellow fluorescence in this embodiment. That is, the phosphor 45 converts the wavelength of the emitted light from the light emitting element 32.

  The diffusing material 46 diffuses the radiated light from the light emitting element 32, and diffuses to at least a position on the front side in the optical axis direction with respect to the light emitting element 32 in the sealing portion 33, in this embodiment, the entire sealing portion 33. Has been mixed.

  And the blue radiated light from the light emitting element 32 lit by the lighting circuit is mixed with the yellow radiated light from the phosphor 45 excited by this radiated light and diffused by the diffusing material 46, White light with suppressed color unevenness is emitted from the sealing portion 33 (light-emitting module 14).

  In this way, by mixing the diffusing material 46 at least at the light emitting element 32 in the sealing portion 33 in which at least one type of phosphor 45 is mixed, the light diffusing material 46 is mixed at a position on the optical axis direction front side. The light intensity of the light emitting element 32 of the Lambertian light distribution arranged on each side surface 31a of the support 31 is relatively small (weak), and the light toward the front side in the optical axis direction is diffused and compensated by the diffusing material 46. The light distribution can be aligned.

  Further, by mixing the diffusing material 46 into the sealing portion 33, the entire light distribution can be more reliably aligned, and the sealing portion 33 can be made spherical, and the sealing portion 33 can be formed. It becomes easier.

  In the fifth embodiment, as in the sixth embodiment shown in FIG. 12, the shape of the sealing portion 33 is set so that the dimension in the optical axis direction is perpendicular to the optical axis direction. It is also possible to use an elliptical sphere that is flat in the optical axis direction, that is, a rotating body that has an elliptical cross section in the direction along the optical axis direction. In this case, the diffusion material 46 of the fifth embodiment may not be mixed, and the intensity of the emitted light from the light emitting element 32 is relatively small depending on the shape of the sealing portion 33 toward the front side in the optical axis direction. The light intensity can be corrected to be approximately equal to the direction orthogonal to the optical axis direction where the intensity of the emitted light from the light emitting element 32 is relatively large. Accordingly, as in the fifth embodiment, the entire light distribution can be made uniform, and white light with suppressed color unevenness is emitted from the sealing portion 33 (light emitting module 14).

  In addition, since the diffusing material 46 is not necessary, it can be manufactured at a lower cost.

  Next, a seventh embodiment will be described with reference to FIG. In addition, about the structure and effect | action similar to said each embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the seventh embodiment, each light emitting element 32 emits radiated light whose peak wavelength is a predetermined wavelength, in this embodiment, blue light, and a plurality of types, for example, three types, are contained in the sealing portion 33. The 1st thru | or 3rd fluorescent substance 51-53 which is this fluorescent substance is mixed.

  The first phosphor 51 is excited by blue radiation from the light emitting element 32 and emits a peak wavelength different from the excitation wavelength, that is, red fluorescence in this embodiment.

  The second phosphor 52 is excited by blue emitted light from the light emitting element 32, and emits a peak wavelength different from the excitation wavelength, that is, yellow fluorescence in this embodiment.

  The third phosphor 53 is excited by blue radiation from the light emitting element 32, and emits a peak wavelength different from the excitation wavelength, that is, green fluorescence in this embodiment.

  Therefore, the first to third phosphors 51 to 53 are different from each other in the color wavelength of the emitted light. In other words, each of the first to third phosphors 51 to 53 converts the emitted light from the light emitting element 32 into different wavelengths.

  In the present embodiment, inside the sealing portion 33, the light is emitted from the third phosphor 53 to the first phosphor 51 sequentially from the rear side to the front side in the optical axis direction. Yes. That is, the first to third phosphors 51 to 53 are arranged so that layers are sequentially formed from the short wavelength to the long wavelength from the rear side to the front side in the optical axis direction. The first phosphor 51 is positioned on the front side in the optical axis direction with respect to the light emitting element 32, and the front side in the optical axis direction of the sealing portion 33 is configured in layers, and the second phosphor 52 is relatively on the front side. The light emitting element 32 positioned is covered and the vicinity of the central portion in the optical axis direction of the sealing portion 33 is formed in a layered manner, and the third phosphor 53 covers and seals the light emitting element 32 positioned relatively rearward. The rear side in the optical axis direction of the portion 33 is structured in layers.

  The blue radiated light from the light emitting element 32 lit by the lighting circuit is mixed with the red, yellow and green radiated light from the first to third phosphors 51 to 53 excited by the radiated light. . At this time, the first to third phosphors 51 to 53 are arranged in order from the relatively short wavelength to the long wavelength of the radiated light in the light emitting direction. Mutual absorption of light by the third phosphors 51 to 53 is suppressed, and a decrease in light emission efficiency can be suppressed, and radiation light from the light emitting element 32 and radiation light from the first to third phosphors 51 to 53 are generated. White light mixed and suppressed in uneven color is emitted from the sealing portion 33 (light emitting module 14).

  In particular, since the short wavelength light is easily absorbed by the phosphor that generates the long wavelength light, the second and third phosphors 52, which have a relatively short color wavelength of the emitted light at the position covering the light emitting element 32, 53 is disposed, and the first wavelength of the emitted light is relatively long on the front side in the optical axis direction, which is the emission direction side of the light that does not cover the light emitting element 32 and the intensity of the emitted light from the light emitting element 32 is relatively weak. Since the phosphor 51 is arranged, the fluorescence (radiated light) by the second and third phosphors 52 and 53 is not easily absorbed by the fluorescence (radiated light) by the first phosphor 51, thereby further reducing the luminous efficiency. It can be reliably suppressed.

  In the seventh embodiment, as in the eighth embodiment shown in FIG. 14, the first to third phosphors 51 to 53 are moved from the center side of the sealing portion 33 to the outside. The phosphor 51, the second phosphor 52, and the third phosphor 53 may be arranged in this order. That is, the first to third phosphors 51 to 53 may be sequentially arranged from the center side of the sealing portion 33 to the outside and from the long wavelength of the emitted light to the short one. Also in this case, the blue radiated light from the light emitting element 32 lit by the lighting circuit is the red, yellow and green radiated light from the first to third phosphors 51 to 53 excited by the radiated light. When mixed with each other, mutual absorption of light by the first to third phosphors 51 to 53 is suppressed, and a decrease in light emission efficiency can be suppressed.

  The seventh and eighth embodiments may be combined with the second to sixth embodiments.

  In the fifth to eighth embodiments, the types of the phosphor 45 and the first to third phosphors 51 to 53 and the types of the light emitting elements 32 are not limited to these embodiments, and illumination Depending on the application of the device 11, etc., it can be appropriately changed so that a desired emission color can be obtained.

  Further, in each of the above embodiments, the shape of the support 31 is not limited to a straight column, and for example, the cross-sectional area in the direction orthogonal to the optical axis direction is gradually reduced from the rear side to the front side in the optical axis direction. It can also be a pyramid shape or a truncated pyramid shape.

  Then, according to at least one embodiment described above, the plurality of light emitting elements 32 are integrally covered with the same sealing portion 33, for example, compared with a case where the number of side surfaces 31a of the support 31 is increased. While suppressing the increase in size, the emitted light from the light emitting element 32 can be diffused by the sealing portion 33 to suppress uneven color.

  Next, a ninth embodiment will be described with reference to FIG. In addition, about the structure and effect | action similar to said each embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the ninth embodiment, the support 31 has a truncated pyramid shape (a truncated pyramid shape) in which the cross-sectional area in the direction orthogonal to the optical axis direction gradually decreases, that is, narrows from the front side to the rear side in the optical axis direction. Is formed. For this reason, the support 31 is inclined so that the normal direction of each side surface 31a faces the rear side in the optical axis direction, and the side surfaces 31a face the reflecting surface 25.

  Then, by combining the light emitting module 14 having the support 31 configured as described above with the reflecting portion 13, almost all of the emitted light from the light emitting element 32 can be incident on the reflecting surface 25. In general, when the light emitting element 32 is mounted on the side surface 31a of the support 31 and arranged three-dimensionally, the reflected light directly emitted from the front end opening (cover 15) of the reflecting portion 13 out of the emitted light from the light emitting element 32 cannot be controlled. The uniformity of the irradiated surface tends to decrease. On the other hand, in the present embodiment, since the emitted light from the light emitting element 32 that directly emits from the front end opening (cover 15) of the reflecting portion 13 without being reflected by the reflecting surface 25 is suppressed, The external emission of emitted light can be controlled by the reflecting surface 25, and the uniformity of the irradiated surface can be improved.

  Next, a tenth embodiment will be described with reference to FIG. In addition, about the structure and effect | action similar to said each embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the tenth embodiment, the light emitting module 14 (support 31) is detachable from the reflecting portion 13. The rear end portion of the support 31 is detachably held by being inserted and fitted into a recess 55 provided in the central portion (position intersecting the optical axis) of the main body portion 12 (storage portion 21), for example. The For example, in the lighting device 11 in which the light emitting module 14 cannot be attached / detached, the lighting device 11 needs to be replaced every time the lifetime is changed or when the light emission color is changed to a different one. In the present embodiment, the light emitting module Since 14 can be attached and detached, the light emitting module 14 can be easily replaced when changing the lifetime or changing the emission color.

  In the ninth and tenth embodiments, the sealing portions 33 of the first to eighth embodiments can be applied.

  Further, in the fifth to tenth embodiments, the support body 31 may be formed in a hexagonal column shape or the like as in the second embodiment or the fourth embodiment.

  Moreover, in the said 1st thru | or 10th embodiment, if the support body 31 is a polygonal column shape more than a triangular prism, it will not be limited to a square column shape or a hexagonal column shape.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

11 Lighting equipment
13 Reflector
14 Light emitting module
25 Reflective surface
31 Support
31a side view
32 Light emitting element
33 Sealing part
41 Output surface
45 phosphor
46 Diffuser
51 1st fluorescent substance which is fluorescent substance
52 Second phosphor as a phosphor
53 Third phosphor as a phosphor

Claims (7)

A reflecting portion having a concave reflecting surface for reflecting and emitting light;
A columnar support disposed inside the reflecting portion along the optical axis direction, a light emitting element disposed on a side surface of the support, and a light-transmitting resin and integrally covering these light emitting elements. A light emitting module having a sealing portion;
An illumination device comprising: The lighting device according to claim 1, wherein the sealing portion is formed in a spherical shape and integrally covers all the light emitting elements. The light emitting module
At least one type of phosphor mixed in the sealing portion and excited by the emitted light of the light emitting element to emit light having a wavelength different from the excitation wavelength;
The diffusing material that mixes at least the light emitting element in the sealing portion at a position on the light emitting direction side and diffuses the emitted light of the light emitting element is provided. Lighting device. The light emitting module includes a plurality of types of phosphors that are mixed in the sealing portion and excited by the light emitted from the light emitting element to emit light having a wavelength different from the excitation wavelength.
The phosphors are different from each other in the wavelength of emitted light, and are sequentially arranged from a relatively short wavelength to a long wavelength of emitted light in the light emission direction. The lighting device according to claim 2. The light emitting module includes a plurality of types of phosphors that are mixed in the sealing portion and excited by the light emitted from the light emitting element to emit light having a wavelength different from the excitation wavelength.
The phosphors have different wavelengths of emitted light, and are sequentially arranged from a relatively long wavelength to a short wavelength of emitted light from the center side to the outside of the sealing portion. The lighting device according to claim 2. The sealing portion has an emission surface that is inclined with respect to the optical axis direction so as to face the reflection surface, and is formed into a rotating body having a rotation axis along the optical axis direction, and integrally covers all the light emitting elements. The lighting device according to claim 1. The light emitting module includes at least one phosphor that is mixed in the sealing portion and excited by the light emitted from the light emitting element to emit light having a wavelength different from the excitation wavelength.
The lighting device according to claim 1, wherein the sealing portion is formed in a flat shape in which a dimension in an optical axis direction is smaller than a dimension in a direction orthogonal to the optical axis direction.

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