TW201307750A - Lamp and light apparatus - Google Patents

Abstract

The invention provides a lamp and a lighting apparatus. The lamp is used to prevent the light utilization rate from being reduced and simultaneously suppress the light quantity towards the circumferential direction. A LED lamp (1) is structured as follows: a concave mirror (18) and a LED (10) arranged on a bottom opening (18B) of the concave mirror (18) and capable of emitting the light outside are arranged on the top (2A) of a basal body (2) and a reflection surface (44) for controlling the light distribution of the concave mirror (18) has light transmittance.

Description

Lamps and lighting fixtures

The present invention relates to a lamp and a lighting fixture equipped with a light-emitting element such as an LED or an organic EL element in a light source.

In recent years, with the high output of LEDs and the reduction in cost, LED bulbs equipped with LEDs in light sources have become popular. Such an LED lamp has a base that can be attached to a socket of an existing device, and is used as a replacement lamp (for example, refer to Japanese Patent Laid-Open Publication No. Hei.

Further, a halogen bulb is widely used as a light source for a spotlight, and an LED lamp for the purpose of replacing the halogen bulb has also been proposed. In order to obtain a light distribution similar to that of a halogen bulb, such an LED lamp has the following structure.

That is, it is proposed to accommodate an LED in a socket having a base at a rear end, and a cover member for covering an opening formed at a front end of the socket, and a side wall portion extending from a front end of the socket toward a front side is provided in the cover member The side wall portion is configured to transmit the light from the LED to the outside (for example, see Patent Document 3). With the LED lamp of this configuration, the LED light is radiated toward the circumferential direction through the side wall portion of the covering member, and the light distribution is close to the halogen bulb.

Also, an LED lamp is proposed, comprising: a bowl-shaped heat sink having a bottom portion and a side portion; an LED disposed at a bottom portion of the heat sink; and a light control member for controlling light emitted from the LED, the light control member will be LED A part of the emitted light is guided to the side portion of the heat sink, and the side portion is light-transmissive The structure is excessive (for example, refer to Patent Document 4). According to the LED lamp of this structure, a desired light collecting and light distribution is formed on the light control member, and a part of the light of the LED is guided to the side surface portion to be transmitted, and light is radiated from the side surface portion, so that the entire LED lamp is The light distribution is close to the halogen bulb.

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2009-4130

[Patent Document 2] International Publication No. 2009/063655

[Patent Document 3] Japanese Utility Model Registration No. 3164202

[Patent Document 4] Japanese Patent No. 4745467

However, in the LED lamp of Japanese Patent Laid-Open No. 3, if the width of the side wall portion of the covering member in the height direction (the width from the end portion of the socket opening to the front end portion of the lid) is narrow, the light distribution such as a halogen bulb cannot be sufficiently reproduced. No uniform light distribution is obtained. In order to solve this problem, when the width of the side wall portion in the height direction is increased, the light radiated from the LED in the circumferential direction is originally irradiated to the circumferential direction through the side wall portion, and the amount of light in the circumferential direction is excessively increased, and the front side is excessively directed. The problem that the amount of illumination light also decreases.

Therefore, for example, in order to suppress the amount of light to be irradiated in the circumferential direction, when the light transmittance of the side wall portion is lowered, the portion is shielded by the side wall portion, and the amount of light which is unhelpful is increased, and the light use efficiency is lowered.

On the other hand, in the LED lamp of Patent Document 4, the side surface portion of the heat sink in which the LED is housed is light-transmitted, and the light can be irradiated to a wide range in the circumferential direction as compared with the LED lamp of Patent Document 3. However, since the irradiation of the light toward the side surface portion is controlled by the light control member, once the light of the LED is irradiated to the width range of the side surface portion by the light control member, the result is the same as that of the LED lamp of Patent Document 3 above. It will only be illuminated from the limits of the side sections. In addition, in the LED lamp of Patent Document 4, in order to control the light emitted from the LED and distribute a part of the emitted light to the side surface portion, the irradiation in the circumferential direction is also controlled. Therefore, the light control member is required to be produced. It is not easy to design the light control member for the light distribution of the LED lamp while realizing the control of the light distribution and the distribution of the light to the side portion.

The present invention has been made in view of the above-described circumstances, and an object of the invention is to provide a lamp and a lighting fixture capable of suppressing the amount of light in the circumferential direction while preventing a decrease in light use efficiency.

In order to achieve the above object, the present invention provides a lamp characterized in that a concave mirror and a light-emitting element disposed at a bottom of the concave mirror for emitting light are disposed at one end of the base body, so as to control the concave mirror of the front surface. The reflecting surface of the light has light transparency.

According to still another aspect of the invention, in the above-mentioned lamp, a front surface concave mirror is formed on a transparent base material, and a dichroic film is provided on an inner circumferential surface of the base material to form a front reflection surface.

According to the present invention, in the above lamp, the feature is: concave reflection in the front At the bottom of the mirror, a neck portion surrounding the periphery of the light-emitting element and having the non-reflecting surface on which the light of the light-emitting element is incident is placed.

Further, in the above-described lamp, the outer peripheral surface of the base material has light diffusibility.

According to still another aspect of the invention, in the above lamp, the lens includes a lens that closes a front end opening of the concave mirror.

According to still another aspect of the invention, in the above-mentioned lamp, a front light-emitting element and a front surface concave mirror are provided, and a base member made of a heat conductive material is provided at one end portion of the front substrate, and heat is provided in the base member. Mass) department.

According to still another aspect of the invention, in the above-described lamp, the base member includes an edge portion that protrudes in a circumferential direction of the front substrate, and the edge portion of the protrusion is integrally provided with a front portion that extends in a direction slightly orthogonal to the front circumferential direction. a heat absorbing portion; a heat absorbing cover covering an exposed portion of the heat absorbing portion of the front surface, wherein the heat absorbing cover has electrical insulation properties and has a lower thermal conductivity than the heat absorbing portion.

Further, in order to achieve the above object, a lighting fixture is provided, characterized in that a reflecting surface for controlling light distribution is provided, and the reflecting surface has a light-transmitting concave mirror that transmits a part of the incident light, and is disposed on the concave reflecting surface. A light-emitting element that emits light at the bottom of the mirror is provided in a casing having a mounting portion for mounting the device, and a power supply circuit for supplying lighting power to the front light-emitting device is provided in the front casing.

According to still another aspect of the invention, in the lighting device of the present invention, the base member is provided with a heat conductive material to which the light-emitting element is mounted, On the back side of the base member, a heat sink that is thermally coupled to the front housing is provided.

Further, according to the present invention, in the above lighting fixture, the base member is provided with a heat conductive material to which the light-emitting element is mounted, and the base member includes a heat absorbing portion.

According to still another aspect of the invention, in the lighting device of the present invention, the neck portion of the non-reflecting surface that surrounds the light-emitting element and the light of the light-emitting element is incident on the bottom of the front-surface concave mirror.

According to still another aspect of the invention, in the above lighting device, the front housing is formed in a tubular shape, and the opening of the end portion of the front housing is closed by the front base member.

In addition, this detailed list includes the Japanese patent application filed on March 3, 2011, Japanese Patent Application No. 2011-45903, and January 10, 2011, and Japanese Patent Application No. 2011-24160 All content.

According to the present invention, since the reflecting surface of the concave reflecting mirror has light transmittance, light transmitted through the reflecting surface is radiated in the circumferential direction, and light distribution close to the halogen bulb can be realized. In particular, since the reflecting surface for controlling the light distribution has light transmittance, the light of the light emitting element can be incident on the reflecting surface without using other members, and the light can be radiated in a wide range in the circumferential direction. In addition, in the emitted light of the light-emitting element, light that has not passed through the reflecting surface is slightly applied to the direction of the optical axis in the main irradiation direction, so that the deterioration of the illumination efficiency can be suppressed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the following embodiments, an example of the light-emitting element constituting the light source is exemplified by an LED. However, the present invention is not limited thereto, and may be another light-emitting element such as an organic EL.

[First Embodiment]

Fig. 1 is a perspective view of the entire LED lamp 1 according to the present embodiment. Fig. 1(A) is a top perspective view, and Fig. 1(B) is a bottom perspective view. 2 is a plan view showing an external configuration of the LED lamp 1. FIG. 2(A) is a plan view, FIG. 2(B) is a side view, and FIG. 2(C) is a bottom view. Fig. 3 is a cross-sectional view showing the internal structure of the LED lamp 1.

The LED lamp 1 has the same shape and optical characteristics as the existing halogen bulb or incandescent bulb, and can be used as an alternative to the existing bulb.

In other words, the LED lamp 1 has a substantially cylindrical base body 2 as shown in Fig. 1, and the light-emitting portion 4 is provided at the tip end portion 2A (Fig. 3) of one end portion of the base body 2, and is the other end. The base portion 2B of the portion is provided with a base 6. The base 2 is formed of an insulating material such as ceramic or resin. The base 6 includes: a cylindrical sleeve 6A that is cut into a threaded ridge of a socket (not shown); and a contact piece (eyelet) that is disposed at the top of the end of the sleeve 6A with an insulating portion 6B 6C, the sleeve 6A and the contact piece 6C are formed in a shape size that can be mounted on an existing lamp holder. Thereby, the LED lamp 1 can be mounted on the ceiling and the wall surface in the existing lamp holder, and can be used as an alternative Use on behalf of existing halogen or incandescent bulbs.

The light-emitting unit 4 is a circuit board 12 in which a light source is provided with an LED 10, and as shown in FIG. 3, a circuit such as a drive circuit or a power supply circuit required for lighting the LED 10 is housed inside the base 2. The power supply circuit of the circuit board 12 and the sleeve 6A of the base 6 and the contact piece 6C are electrically connected to each other, and the base 6 is mounted on the socket, passes through the sleeve 6A of the base 6, and the contact piece 6C, from which the socket is Power is supplied to the power supply circuit of the circuit substrate 12.

Further, as for the configuration of the light-emitting portion 4, as shown in Fig. 3, the light-emitting portion 4 includes an upper LED 10, a mounting base member 16, a concave mirror 18, and a Fresnel lens 20.

A surface mount type LED package that emits white light is used for the LED 10. In other words, the LED 10 includes an LED chip and a thin package having a rectangular shape in which a housing recess for accommodating the LED chip is formed, and the LED chip is sealed in the package by a transparent resin such as silicone resin. Storage recess. Among the transparent resins, a dispersion (a fluorescent pigment, a fluorescent dye, or the like) of a wavelength conversion material that emits light of a luminescent color different from an LED wafer by excitation of light emitted from an LED wafer is dispersed. The light from the LED chip is mixed with the light of the phosphor to obtain white color.

As shown in Fig. 3, the base member 16 is a member that serves as a support for the concave mirror 18, a base on which the light-emitting surface of the LED 10 is placed, a heat sink of the LED 10, and a heat absorbing function.

That is, the base member 16 is mounted, and has a disk portion 30 having a substantially circular plate shape, a base portion 32 projecting from a substantially central portion of the disk portion 30, and a disk portion 30. The heat absorbing portion 34 provided throughout the circumference It is integrally formed by a metal material such as aluminum material having high thermal conductivity.

In the disc portion 30, the LED 10 and the concave mirror 18 are provided on the main surface side of the front side, and the base 2 is provided on the main surface on the back side. The disc portion 30 is a tip end portion 2A of the occlusion base 2, and has an edge portion having a diameter protruding outward in the circumferential direction to the tip end portion 2A of the base body 2, and at the edge portion of the projection, along the entire circumference, along the base body 2 The heat absorbing portion 34, which will be described later, extends to the upper and lower sides (the direction perpendicular to the circumferential direction) is integrally formed.

The base portion 32 is a convex portion having a substantially circular shape on the upper surface of the main surface of the front side of the disc portion 30, and an insertion hole 32A in which the LED 10 is embedded. The LED 10 is embedded in the insertion hole 32A, and the heat generated by the LED 10 is moved from the bottom surface and the side surface of the LED 10 to the base portion 32, thereby achieving an improvement in heat dissipation efficiency. Further, in the base portion 32, through holes 32B penetrating vertically are provided at two places, and the leads of the positive potential and the negative potential extending from the circuit board 12 of the base 2 are connected to the LEDs 10 through the respective through holes 32B.

The heat absorbing portion 34 is a side wall of the disk portion 30 that extends vertically along the central axis K of the base 2 to form a side wall having a height W, and functions as an endothermic (heat capacity) function for absorbing the heat generated by the LED 10. Further, the lower end portion 34A of the heat absorbing portion 34 is an insertion opening 39 that receives the tip end portion 2A of the receiving body 2. Between the base body 2 and the mounting base member 16, the resin agent 38 for subsequent use is filled without a gap, and then sealed.

The gap between the base body 2 and the heat absorbing portion 34 of the mounting base member 16 is preferably 3 mm or less, whereby the finger can be prevented from coming into contact with the heat absorbing portion 34 from the gap.

Further, the lower end portion 34A of the heat absorbing portion 34 is configured to form the insertion opening 39, and the insertion opening 39 is inserted into the tip end portion 2A of the base body 2, so that the entire length of the LED lamp 1 can be shortened.

Here, since the heat absorption of the heat absorbing portion 34 is increased in proportion to the volume, the height width W or the thickness T can be increased to improve the heat absorbing performance. At this time, if the thickness T is so large as to be in the circumferential direction of the base 2 (the direction orthogonal to the central axis K), the size of the LED lamp 1 is caused to be larger than that of the concave mirror 18 to be described later in a plan view. Since the thickness is large, it is desirable that the thickness T is limited to a thickness in a plane view, and the heat absorbing portion 34 is rounded up in the range of the tip end opening 18A of the concave mirror 18, and it is desirable to increase the height to a width exceeding the limit requiring heat absorption. W. However, when the height width W is increased, the upper end portion 34B is restricted to the lower end 44A of the reflecting surface 44 at a height position similar to the neck portion 42 of the concave reflecting mirror 18 so as not to restrict the shape of the concave reflecting mirror 18 to be described later. It is preferable to extend the same height position and to supplement the lower end portion 34A toward the lower side.

Further, the heat generated by the LED 10 is absorbed by the mounting base member 16 including the heat absorbing portion 34, and is radiated from the heat absorbing portion 34 to the outside. However, a part of the heat is radiated to the base 2, and heat is radiated from the entire base 2 to the outside.

In the LED lamp 1, the heat absorbing portion 34 protrudes more than the base body 2 in the circumferential direction, and is easy for the user to contact. However, the mounting base member 16 including the heat absorbing portion 34 is formed of a metal material having high thermal conductivity, so that it is electrically conductive. It is high in nature and also heats up due to heat mass. Therefore, in order to prevent electric shock and burns due to contact with the heat absorbing portion 34, the heat absorbing portion 34 is provided with high insulating properties and lower thermal conductivity than the heat absorbing portion 34. The adhesive is formed to cover the heat absorbing cover 46 exposed to the entire exposed portion on the outer side of the heat absorbing portion 34.

Thereby, even in the case where the heat absorption of the heat absorbing portion 34 is increased and the cooling performance of the LED 10 is improved, the electric sensation and burns due to contact with the heat absorbing portion 34 can be prevented.

The heat absorbing cover 46 is provided around the mounting base member 16 by, for example, insert molding, whereby the heat absorbing cover 46 can be fixed to the heat absorbing portion 34 with a simple fixing strength that is strong enough that the heat absorbing cover 46 does not fall off.

In the present embodiment, the thickness (the thickness of the circumferential direction) of the heat absorbing cover 46 is a lower limit (for example, 2 mm) which can prevent the electric power of 1.2 kV and the scald at the time of contact, and can be installed at the lower limit. The circumferential dimension (for example, 4 mm) of a socket holder or the like for a halogen bulb is an upper limit.

Fig. 4 is an enlarged view showing the concave mirror 18 in Fig. 3.

The concave reflecting mirror 18 is a reflecting surface 44 having a rotating elliptical surface that reflects the light emitted from the LED 10 in the optical axis direction and controls the light distribution to form a spot light distribution, and the entire reflecting surface 44 has a light transmissive structure. The light is also radiated from the entire surface of the reflecting surface 44 toward the optical axis in the circumferential direction, and the optical axis is provided to be substantially coaxial with the central axis K of the base 2.

Specifically, the concave mirror 18 has a bottom opening 18B at the center of the bottom, and a slightly comprehensive inner surface of the range D from the bottom opening 18B to the front end opening 18A serves as the reflecting surface 14. On the other hand, the bottom opening 18B is integrally provided with a cylindrical neck portion 42 extending toward the rear end side. The neck portion 42 is disposed at a heat absorbing portion provided by the base portion 32 and the outer side of the base member 16 The groove portion 50 formed by 34 is followed by a transparent adhesive 52 filled in a gap with the heat absorbing portion 34. In this manner, since the concave mirror 18 is inserted and fixed in the groove portion 50, the entire length of the LED lamp 10 can be shortened. At this time, the width of the groove portion 50 is preferably a size of 3 mm or less of the gap between the concave mirror 18 and the heat absorbing portion 34, whereby the finger can be prevented from coming into contact with the heat absorbing portion 34 from the gap.

Moreover, the length L of the neck portion 42 is longer than the height from the disc portion 30 of the base portion 32 of the mounting base member 16, whereby the neck portion 42 surrounds the LED 10 disposed above the base portion 32. The reflecting surface 44 is disposed at a position higher than the light emitting surface 10A of the LED 10. More specifically, the light-emitting surface of the LED 10 is a position surrounded by the neck portion 42, and the light emitted from the light-emitting surface is disposed at a height position of both the neck portion 42 and the reflection surface 44.

The concave mirror 18 is electrically insulating, has a high thermal resistance with the mounting base member 16 (lower thermal conductivity than the mounting base member 16), and is provided with a transparent resin or a transparent material which is transparent to the light of the LED 10. The base material 60 formed of glass or the like is formed by forming a reflecting surface 44 on the base material 60 by a reflection film having a light transmissive property on the inner surface of the upper surface of the range D. The concave mirror 18 is configured by the related substrate 60, and the concave mirror 18 exposed to the outside is charged, and high temperature can be prevented.

As shown in FIG. 4, the light M1 emitted from the LED 10 and incident on the reflecting surface 44 is reflected by the reflecting surface 44 and becomes reflected light M2, and is radiated to the outside through the tip end opening 18A (toward the central axis K direction). Some of them are radiated toward the circumferential direction by the transmitted light M3 through the reflecting surface 44.

Thereby, the transmitted light M3 is radiated from the slightly full surface of the reflecting surface 44 in the circumferential direction, so that light distribution close to the halogen bulb and the incandescent bulb can be achieved.

Further, since the reflecting surface 44 has light transparency, the light that has not passed through the reflecting surface 44 becomes the reflected light M2, and is used as the main irradiation light for the center axis K direction, so that the light utilization efficiency is good.

In the neck portion 42 of the concave mirror 18, the upper reflective surface 44 is not formed, and is still a non-scale transparent material. Therefore, the light M4 incident from the LED 10 to the neck portion 42 is a gap between the heat absorbing portions 34 that allows light to pass through the neck portion 42, thereby supplementing the portion of the lower end (bottom opening 18B) of the reflecting surface 44 toward the circumferential direction. brightness. Further, a part of the light M4 incident on the neck portion 42 becomes the propagating light M5 propagating inside the base material 60 of the concave reflecting mirror 18, and causes the entire base material 60 to emit light, contributing to an increase in the amount of emitted light in the circumferential direction. .

A Fresnel lens 20 is provided on the tip end opening 18A of the concave mirror 18. The Fresnel lens 20 is one of the front and back of a resin-made disk-shaped member, and is provided with grooves that are concentric and have different angles. In the present embodiment, the Fresnel lens 20 is provided in the tip end opening 18A of the concave reflecting mirror 18 with the main surface 20A in which the groove is provided facing the inner side (the LED 10 side) and the other main surface 20B facing the outer side.

Specifically, at the tip end portion 18A of the concave reflecting mirror 18, a step portion 19 in which the Fresnel lens 20 is embedded is formed, and the Fresnel lens 20 is embedded in the step portion 19 and the resin agent is used, and the Fresnel lens 20 is occluded. The state of the tip end opening 18A of the concave mirror 18 is fixed.

The associated Fresnel lens 20 is provided to occlude the tip opening 18A, In the light M6 incident on the Fresnel lens 20, a part of the light M6 incident on the grooved surface 20A is reflected toward the reflection surface 44, and the reflected light M7 is radiated toward the circumferential direction through the reflection surface 44. The amount of radiation in the circumferential direction increases, and the utilization efficiency of light increases.

Thereby, as shown in Fig. 5, even if it is the LED lamp 1, the light distribution close to the light distribution of the halogen bulb can be realized.

Here, in the present embodiment, the reflection film forming the reflection surface 44 of the concave mirror 18 is a wavelength selective of the light transmitted through the reflection surface 44 by using a dichroic film made of a dielectric multilayer film. .

Fig. 6 is a view showing an example of the optical characteristics of the reflective film. Fig. 6(A) shows the spectral transmittance of the reflective film, and Fig. 6(B) shows the spectral reflectance of the reflective film.

The reflection film of the reflection surface 44 is light that reflects (slightly transmits) the LED 10 having an emission wavelength of 400 nm to 800 nm, and has optical characteristics of transmitting a part of the light at a wavelength of 400 nm to 800 nm. The light of the indirect light that is suitable for being irradiated by the light that is transmitted through one of the reflection films is radiated in the circumferential direction, and the reflected light from the reflection surface 44 is mainly used as the main illumination light, and is radiated from the tip end opening 18A. As shown in the figure, the same color rendering as the existing LED lamps can be maintained.

The reflective film formed on the reflecting surface 44 can be selected as a light-splitting film made of an interlayer multilayer film, and can have a wavelength of transmitted light. Although it is required to transmit a free wavelength in accordance with an illumination design or the like, the interface multilayer film is subjected to light transmission. Since the wavelength dependence is generated in the direction, when the radiation in the circumferential direction is applied to the wall surface, for example, color unevenness or illuminance unevenness occurs.

Therefore, on the outer peripheral surface 62 of the concave reflecting mirror 18, for example, an embossing process having a light scattering function for scattering transmitted light is performed on the surface, thereby suppressing color unevenness or illuminance unevenness of light radiated in the circumferential direction.

As described above, according to the present embodiment, the concave reflecting mirror 18 and the LED 10 of the light-emitting element for emitting light disposed in the bottom opening 18B of the concave reflecting mirror 18 are provided at the tip end portion 2A of the base 2, so that the concave reflecting mirror 18 is provided. The LED light 1 having the light transmissive property of the reflecting surface 44 is integrated.

Thereby, the transmitted light is radiated from the slightly more comprehensive direction of the reflecting surface 44 toward the circumferential direction of the LED 10, so that light distribution close to the halogen bulb and the incandescent bulb can be achieved. In particular, the reflecting surface 44 has light transmittance, and the light that is not transmitted through the reflecting surface 44 is reflected light and is applied to the optical axis direction of the main irradiation direction. Even if the amount of transmitted light is suppressed, waste is not generated, and the light utilization efficiency is good.

According to the present embodiment, the concave reflecting mirror 18 is formed on the transparent base material 60, and the spectroscopic film is formed on the inner peripheral surface of the base material 60 to form the reflecting surface 44, which meets the requirements from the lighting design, and can be easily and freely selected. The wavelength of the light transmitted in the circumferential direction can also easily produce a barishon of the LED lamp 1 having different illumination colors in the circumferential direction.

According to the present embodiment, the outer peripheral surface 62 of the base material 60 of the concave reflecting mirror 18 has light diffusibility by embossing or the like. Therefore, even if the reflecting surface 44 is formed by the spectral film made of the dielectric multilayer film, the reflecting surface 44 can be formed. It suppresses uneven color or illuminance unevenness of light emitted in the circumferential direction.

According to the present embodiment, the Fresnel lens 20 having the tip end opening 18A of the concave mirror 18 is closed. Therefore, the light reflected on the back surface of the Fresnel lens 20 can be made to be irradiated in the circumferential direction. Good use.

According to the present embodiment, the LED 10 and the concave mirror 18 are provided on the main surface of the front side of the disc portion 30 of the plate-like base member, and the cylindrical base 2 is provided on the back side of the disc portion 30, so that the disc portion 30 is provided. The edge portion protrudes in the circumferential direction of the substrate 2 (the direction orthogonal to the central axis), and the heat absorbing portion 34 extending along the outer circumferential surface of the base 2 is provided on the entire circumference of the protruding edge portion, and the exposure covering the heat absorbing portion 34 is provided. Part of the LED lamp 1 of the heat absorbing cover 46.

With this configuration, heat generation of the LEDs 10 can be conducted to the heat absorbing portion 34 through the disk portion 30, and the processing can be performed efficiently, and the safety when contacting the heat absorbing portion 34 can be ensured.

In particular, the heat absorbing cover 46 has electrical insulation properties and a lower thermal conductivity than the heat absorbing portion 34, and can prevent electric shock and burns during contact.

Furthermore, it is a matter of course that the first embodiment can be arbitrarily modified and applied without departing from the scope of the invention.

[Second Embodiment]

In the LED lamp 1 described in the first embodiment, a circuit board 12 on which a circuit such as a power supply circuit of the LED 10 is mounted is housed in the base 2 of the lamp body in which the base 6 is provided. Therefore, due to the limitation of the space of the substrate 2, the power capacity of the power supply circuit is greatly increased, which is a disadvantage of the high output of the amount of light of the LED lamp 1.

Therefore, in the present embodiment, a lighting fixture that is easy to increase the power energy of the power supply circuit will be described. Furthermore, each of the referenced in this embodiment In the drawings, the same members as those described in the first embodiment are denoted by the same reference numerals, and their description is omitted.

Fig. 8 is a view showing a plane, a bottom surface, a front surface, and a side surface of the LED lighting apparatus 100 according to the embodiment. Fig. 8(A) is a plan view, and Fig. 8(B) is a bottom view and a eighth view (C). ) is a front view, and Fig. 8 (D) is a side view. FIG. 9 is a cross-sectional view showing the internal structure of the LED lighting apparatus 100.

The LED lighting apparatus 100 is the same as the LED light bulb 1 of the first embodiment, and has a configuration similar to that of the existing halogen bulb used for the light source for concentrating, and can be used for concentrating illumination instead of the halogen bulb.

That is, as shown in FIG. 8, the LED lighting apparatus 100 has a substantially cylindrical base body 102, and is provided with light toward the housing 102 at the tip end portion 102A (Fig. 9) of one end portion of the housing 102. The light-emitting portion 104 radiated in the direction of the center axis K is provided with a support member 106 as a mounting portion for the device installation portion at the end portion 102B of the other end portion.

The support member 106 is slidably mounted to support the above-mentioned track along a track (not shown) called a lighting rail or a duct rail provided at an appliance installation of the LED lighting fixture 100. Housing 102. That is, the support member 106 includes: a socket 108 having a locking portion 108A that is engaged with the rail; and a hollow support rod 110 extending from the socket 108. The tip end portion 110A of the support rod 110 is rotatably coupled to the housing. The terminal portion 102B of the body 102. The electric power of the LED lighting apparatus 100 is supplied from the rail via the electrode 108B (Fig. 8(B)) provided in the locking portion 108A of the socket 108, and passes through the support rod 110. The wiring (not shown) is conducted to the housing 102.

The housing 102 is formed of, for example, a metal material having high thermal conductivity, and the end portion 102B is provided with a holding portion 112 that is rotatably inserted into the tip end portion 110A of the support rod 110, and the housing 102 is rotated relative to the support rod 110 to emit light. The direction of illumination of portion 104 is in the desired direction.

The housing 102 is formed in the same size as the socket on which the existing halogen bulb is mounted. The existing socket is formed into a cylindrical shape in which a halogen bulb is inserted from the tip end, and a lamp holder screwed into the base of the halogen bulb is mounted, and the above-mentioned rail guide is slidably mounted to support the halogen bulb. When a halogen bulb with a mirror is attached to the existing holder, the lower side is housed in the holder from the mirror of the halogen bulb, and the upper side is exposed from the mirror toward the outside from the leading end portion. In the LED lighting apparatus 100 of the present embodiment, the concave end mirror 18 including the light-emitting portion 104 can be provided in a protruding state in the tip end portion 12A of the casing 102 having the outer shape and the same size as the existing socket. The appearance is similar to that of a lighting fixture in which a halogen bulb is installed in an existing holder.

The light-emitting unit 104 includes the LED 10 in the same manner as the light-emitting unit 4 of the first embodiment. As shown in FIG. 11, the casing 102 houses a circuit board 115 on which a circuit such as a drive circuit or a power supply circuit required for lighting of the LEDs 10 is housed. The power supply circuit 176 is connected to the wiring introduced into the casing 102 through the support bar 110 of the support 106, and electric power is supplied to the power supply circuit 176 through the wiring. The power supply circuit 176 generates the lighting power of the LED 10 based on the power, and supplies it to the LED 10 under the control of the drive circuit.

Fig. 10 is an enlarged view of the light emitting unit 104.

The light-emitting unit 104 of the present embodiment has the same light distribution as the existing halogen bulb for the concentrating light source, and as shown in FIGS. 9 and 11 , similarly to the light-emitting unit 104 of the first embodiment, the LED 10 is provided; Base member 116; cup-shaped concave mirror 18; and Fresnel lens 20. As shown in FIG. 10, the LED 10 is configured as a light-emitting surface 10A, and a surface mount type LED package in which light is emitted from the light-emitting surface 10A is used.

In the same manner as in the first embodiment, the mounting base member 116 of the present embodiment includes a disk-shaped disk portion 130 having a substantially circular shape on the upper surface, and a base portion having a tip-shaped shape projecting from the upper center of the disk portion 130. 132; and the heat absorbing portion 134 provided over the entire circumference of the disk portion 130 is integrally molded by a metal material such as aluminum material having high thermal conductivity. Further, the base member 116 is attached, and a heat absorbing cover 146 that covers the entire exposed portion exposed to the outside of the heat absorbing portion 134 is provided.

The disk portion 130 is formed to have a size in which the heat absorbing portion 134 is located at the edge portion 103 of the front end portion 102A of the casing 102 such that the heat absorbing cover 146 covering the heat absorbing portion 134 is adhered to the edge portion 103, and the mounting case member 116 is mounted on The housing 102. The opening of the tip end portion 102A of the casing 102 is closed by the mounting base member 116 to prevent entry of dust or the like.

Further, as shown in Fig. 10, the heat absorbing cover 146 also covers the lower end portion 134A of the heat absorbing portion 134, and is interposed between the casing 102A and the heat absorbing portion 134 to electrically insulate therebetween.

Here, the thickness T of the heat absorbing portion 134 is viewed in a plan view, and it is desirable that the heat absorbing portion 134 is restricted to the tip end opening 18A of the concave mirror 118. In the case of the thickness within the range, in the case where the heat absorption is required beyond this limit, it is desirable to increase the height width W. However, when the height width W is increased, the upper end portion 134B of the heat absorbing portion 134 is restricted to the reflecting surface at the same height as the neck portion 42 of the concave reflecting mirror 18 so as not to restrict the shape of the concave reflecting mirror 18 to be described later. The lower end 44A of 44 is extended at the same height position, and the heat absorbing portion is insufficient, and the lower end portion 134A is extended toward the lower side to be supplemented.

The heat generated by the LED 10 is transmitted to the mounting base member 116 including the heat absorbing portion 134, and is accumulated in the heat absorbing portion 134 to dissipate heat to the outside. However, the LED lighting device 100 is configured to generate heat from the mounting base member 116 toward the side of the housing 102. Conduction.

That is, if the internal structure of the casing 102 is described, that is, as shown in the above-mentioned ninth aspect, in the casing 102, the inside is partitioned into a partitioning plate on the side of the leading end portion 102A and the side of the terminal portion 102B. The 115A is an integrated setting. On the side of the end portion 102B partitioned by the partition plate 115A, the above-described grip portion 112 is provided, and the side of the tip end portion 102A is configured as a substrate storage container 172 that houses the circuit board 115. The partition plate 115 constitutes the bottom surface of the substrate storage container 172, and the circuit board 115 is housed in the vertical state in the partition plate 115A, and the filler 171 is filled. The filler 171 has high electrical insulating properties and thermal conductivity, and heat generated by the circuit board 115 is transferred to the casing 102 by the filler 171 to dissipate heat from the surface of the casing 102.

On the other hand, a heat sink 170 is attached to the back surface of the circular plate portion 130 on which the base member 116 is mounted, and the heat sink 170 is pushed into the filler 171 from the tip end portion 102A of the casing 102, and a filler is interposed therebetween. 171 is thermally bonded to the housing 102. The heat sink 170 includes the base portion 132 The surface contact is directly under the base portion 132 of the circular plate portion 130. Thereby, heat generated by the LED 10 is efficiently transferred from the base portion 132 to the heat sink 170 on the casing 102 side, and is transferred to the casing 102 by the filler 171 to dissipate heat from the surface of the casing 102.

As described above, in the LED lighting apparatus 100, the mounting base member 116 has the heat absorbing portion 134 that accumulates heat generated by the LEDs 10, and further includes the heat sink 170 that transfers heat to the side of the casing 102 to dissipate heat, and the LED 10 is efficiently heated. The heat dissipation gives high cooling performance. Thereby, the high output of the LED 10 is facilitated, and the high-output LED lighting apparatus 100 can be easily realized.

Further, the housing 102 having the same size and shape as the socket of the socket in which the base of the halogen bulb is mounted is provided with the concave mirror 18 and the power supply circuit 176 of the LED 10 mounted in the housing 102. The space in which the power supply circuit 176 is housed can be enlarged as compared with the case where the power supply circuit 176 is incorporated in the LED lamp that mimics the halogen bulb. In this way, the LED lighting device 100 which is mounted on the existing socket in the state in which the LED lamp of the halogen bulb is mounted is mounted on the power supply circuit 176 in which the large capacitor is housed.

The concave reflecting mirror 18 of the present embodiment has a configuration in which the optical characteristics are slightly the same, and the optical axis of the reflecting surface 44 is provided coaxially with the central axis K of the casing 102 at the tip end portion 102A of the casing 102.

Further, in the related configuration, the LED lighting apparatus 100 has the same light distribution (Fig. 5) and the same color rendering (Fig. 6) as the LED lamp 1 of the first embodiment.

As described above, according to the present embodiment, the device is provided at the place where the appliance is provided. The casing 102 of the socket 108 of the mounting portion (the track of the present embodiment) is provided with the power supply circuit 176 for supplying the lighting power to the LED 10, so that the space for accommodating the power supply circuit 176 is larger than that of the conventional LED lamp, and the power supply circuit 176 The increase in the power energy becomes easy, and the high power transfer becomes easy.

Moreover, according to the present embodiment, the heat sink 170 thermally coupled to the casing 102 is provided on the back side of the mounting base member 116 made of the heat conductive material on which the LED 10 is mounted, so that heat generation of the LED 10 can be performed from the mounting base member 116. Transfer to the housing 102 to improve heat dissipation performance.

In particular, according to the present embodiment, since the mounting base member 116 is provided with the heat absorbing portion 134, even when the high-output type LED 10 is used, the heat of the LED 10 can be sufficiently processed in both the mounting base member 116 and the heat sink 170. .

Further, according to the present embodiment, the neck portion 42 of the non-reflecting surface that surrounds the periphery of the LED 10 and that causes the light of the LED 10 to enter is provided at the bottom of the concave reflecting mirror 18. With this configuration, the connection portion of the concave mirror 18 and the casing 102 emits light via the light M4 incident on the neck portion 42, and the propagation light M5 which propagates to the inside of the substrate 60 of the concave mirror 18 is generated. Since the entire substrate 60 emits light, it contributes to the increase in the amount of radiation in the circumferential direction and is close to the light distribution of the existing halogen bulb.

According to the present embodiment, since the opening of the tip end portion 102A of the casing 102 is closed by the attachment base member 116, it is not necessary to separately provide a member for closing the opening, and assembly becomes easy.

Further, the electrically insulating concave mirror 18 provided on the upper surface of the mounting base member 116 and the heat absorbing portion 134 provided along the peripheral edge are provided. The finger is prevented from intruding into the upper surface of the mounting base member 116, and the surface of the surface exposed to the outside of the heat absorbing portion 134 is covered by the heat absorbing cover 146. Therefore, even if the mounting base member 116 is disposed outside the housing 102, the finger can be blocked. Direct contact to the mounting base member 116.

According to the present embodiment, the concave reflecting mirror 18 is formed on the transparent base material 60, and the reflecting surface 44 made of the interlayer multilayer film is formed on the inner peripheral surface of the base material 60 to form the reflecting surface 44, so that it meets the requirements from the lighting design. It is possible to easily and freely select the wavelength of the light passing through the circumferential direction, and it is also possible to easily produce a barishon of the LED lighting apparatus 100 having different illumination light colors in the circumferential direction.

According to the present embodiment, the outer peripheral surface 62 of the base material 60 of the concave reflecting mirror 18 has light diffusibility by embossing or the like. Therefore, even if the reflecting surface 44 is formed by the spectral film made of the dielectric multilayer film, the reflecting surface 44 can be formed. It suppresses uneven color or illuminance unevenness of light emitted in the circumferential direction.

According to the present embodiment, the Fresnel lens 20 having the tip end opening 18A of the concave mirror 18 is closed. Therefore, the light reflected on the back surface of the Fresnel lens 20 can be made to be irradiated in the circumferential direction. Good use.

Further, the second embodiment can be arbitrarily modified and applied without departing from the scope of the invention.

For example, in the second embodiment, the heat sink 170 provided on the back surface of the mounting base member 116 is exemplified by a structure in which the filler 171 is interposed and thermally coupled to the casing 102 indirectly. However, the present invention is not limited thereto, and the heat sink 170 may be thermally coupled directly to the casing 120. E.g The LED lighting apparatus 200 shown in FIG. 11 may be configured such that the side wall 270A that directly heats the surface of the casing 102 and is directly heat-conductive is provided on the heat sink 170. Thereby, the thermal resistance from the heat sink 170 to the casing 102 is reduced, so that the heat dissipation performance of the LED 10 can be further improved.

Further, in the configuration of Fig. 11, since the casing 102 is electrically coupled to the mounting base member 160 by the fins 170, the casing 120 is formed of a material having high electrical insulating properties.

Further, the heat sink 170 may be thermally coupled to the back surface of the mounting base member 116, or may be formed integrally with the base member 116. The heat sink 170 is integrally provided on the back surface of the mounting base member 116, and the thermal resistance between the mounting base member 116 and the heat sink 170 is eliminated, so that the heat of the LED 10 can be efficiently transmitted to the side of the casing 102.

Further, for example, in the second embodiment, the LED lighting fixtures 100 and 200 attached to the rail are exemplified, but the present invention is not limited thereto, and the casing 2 may be directly or indirectly fixed to a mounting surface such as a wall or a ceiling. The mounting portion is fixed to the installation surface by the mounting portion.

1‧‧‧LED lights (lights)

2‧‧‧ base

2A, 102A‧‧‧ apex (one end)

3, 103‧‧‧ edge

4, 104‧‧‧Lighting Department

10‧‧‧LED (lighting element)

16, 116‧‧‧Installation of base member (base member)

18‧‧‧ concave mirror

18A‧‧‧ apex opening

18B‧‧‧Bottom opening (bottom)

20‧‧‧ Fresnel lens (lens)

30, 130‧‧‧ round plate (base)

32, 132‧‧‧Deputy Department

34, 134‧‧ ‧ heat absorption department

42‧‧‧ neck

44‧‧‧reflecting surface

46, 146‧‧ ‧ heat cover

60‧‧‧Substrate

62‧‧‧ outer perimeter

100, 200‧‧‧LED lighting equipment (lighting equipment)

102‧‧‧ housing

106‧‧‧Support (installation department)

170‧‧‧ Heat sink

176‧‧‧Power circuit

K‧‧‧ central axis

Fig. 1 is a perspective view showing an entire LED lamp according to a first embodiment of the present invention, wherein (A) is a top perspective view and (B) is a lower perspective view.

Fig. 2 is a view showing the appearance of an LED lamp, wherein (A) is a plan view, (B) is a side view, and (C) is a bottom view.

Fig. 3 is a cross-sectional view taken along line A-A of Fig. 2.

Fig. 4 is a view showing, in an enlarged manner, a concave mirror of Fig. 3.

Fig. 5 is a view showing the light distribution of the LED lamp and the halogen bulb.

Fig. 6 is a view showing an example of optical characteristics of a reflective film, wherein (A) shows the spectral transmittance of the reflective film, and (B) shows the spectral reflectance of the reflective film.

Fig. 7 is a view showing the light emission amplitude characteristics of the LED lamp, the existing LED lamp, and the halogen bulb of the embodiment.

Fig. 8 is a plan view showing a plane, a bottom surface, a front surface, and a side surface of an LED lighting apparatus according to a second embodiment of the present invention, wherein (A) is a plan view, (B) is a bottom view, (C) is a front view, and (D) is a side view.

Fig. 9 is a cross-sectional view showing the internal structure of an LED lighting device.

Fig. 10 is an enlarged view of a light-emitting portion.

Fig. 11 is a cross-sectional view showing the internal structure of an LED lighting device according to a modification of the second embodiment.

1‧‧‧LED lights (lights)

2‧‧‧ base

2B‧‧‧End Department

4‧‧‧Lighting Department

6‧‧‧ lamp holder

6A‧‧‧ casing

18‧‧‧ concave mirror

18A‧‧‧ apex opening

20‧‧‧ Fresnel lens (lens)

46‧‧‧Heat cover

62‧‧‧ outer perimeter

Claims (9)

A lamp characterized in that a concave reflecting mirror and a light emitting element disposed at a bottom of the concave reflecting mirror for emitting light are disposed at one end portion of the base body, so that a reflecting surface for controlling light distribution of the concave mirror is light transmissive. . The lamp according to claim 1, wherein the front surface concave mirror is formed of a transparent base material, and a dichroic film is provided on an inner circumferential surface of the base material to form a front reflective surface. The lamp according to the second aspect of the invention, wherein the outer peripheral surface of the substrate has light diffusibility. A lamp according to claim 1 or 2, further comprising a lens that closes an opening at a front end of the concave mirror. A lamp according to claim 1 or 2, wherein a front light-emitting element and a front surface concave mirror are provided, and a base member made of a heat conductive material is provided at one end portion of the front substrate, The member is provided with a heat mass portion. The lamp according to claim 5, wherein the front base member includes an edge portion that protrudes in a circumferential direction of the front substrate, and the protruding edge portion is integrally provided to extend in a direction slightly orthogonal to the front circumferential direction. A heat absorbing portion is provided; a heat absorbing cover covering an exposed portion of the heat absorbing portion is provided, and the heat absorbing cover has electrical insulation properties and has a lower thermal conductivity than the heat absorbing portion. A lighting fixture characterized in that: a counter for controlling light distribution is provided a light-emitting element having a light-transmitting concave reflecting mirror that transmits the reflecting surface to a portion of the incident light, and a light-emitting element that emits light at a bottom portion of the concave reflecting mirror is provided on the mounting portion provided with the device mounting portion. In the casing, a power supply circuit for supplying lighting power to the front light-emitting element is provided in the front casing. The lighting fixture according to claim 7, comprising a base member made of a heat conductive material to which the front light emitting element is attached, and a heat sink that is thermally coupled to the front housing is provided on the back side of the base member. . The lighting fixture according to claim 7 or 8, wherein the lighting fixture includes a base member made of a heat conductive material to which the light-emitting element is mounted, and the base member has a heat absorbing portion.