WO2013031043A1

WO2013031043A1 - Lamp and lighting apparatus

Info

Publication number: WO2013031043A1
Application number: PCT/JP2012/000536
Authority: WO
Inventors: 龍海瀬戸本; 保安藤; 山本　温
Original assignee: パナソニック株式会社
Priority date: 2011-08-29
Filing date: 2012-01-27
Publication date: 2013-03-07
Also published as: CN203797374U

Abstract

A lamp (1) is provided with: a light emitting module (10) having a module substrate (11) and a plurality of light emitting sections (13), which are mounted on the module substrate (11), and have the main output direction of light in the direction orthogonally intersecting the module substrate (11); a circuit unit (90), which has an antenna (94) formed of a conductive material, said antenna being disposed on a module substrate (11) surface side on which the light emitting sections (13) are mounted, such that the antenna does not overlap the light emitting sections (13) in the main output direction of the light emitted from the light emitting section (13), and which has a circuit that controls power supply to the light emitting sections (13) on the basis of wireless signals received by means of the antenna (94); and a second reflecting member (80), which is formed of a dielectric material, and is provided in contact with a part of the antenna (94).

Description

Lamps and lighting equipment

The present invention relates to a lamp provided with a semiconductor light emitting element, and more particularly to a lamp that can be controlled to be lit in response to an external wireless signal.

In recent years, a bulb-shaped lamp using a semiconductor light emitting element such as a light emitting diode (LED) has been widely used as a substitute for an incandescent lamp.

This type of lamp includes a light emitting module having a module substrate provided with a semiconductor light emitting element, a power supply circuit for supplying power to the light emitting portion, and a signal for outputting a control signal corresponding to a wireless signal received by an antenna. There is one which is provided with a processing circuit and a control circuit which controls the supply power of the power supply circuit based on a control signal output from the signal processing circuit, and is controlled to be lit by an external wireless signal (see Patent Document 1). .

JP, 2011-9717, A

By the way, in the lamp as described above, a wireless signal from the outside is often incident from the side of the module substrate on which the light emitting unit is disposed. Therefore, although it is advantageous to improve the reception sensitivity of the antenna if the antenna is disposed on the side of the module substrate on which the light emitting unit is disposed, on the other hand, the antenna is mainly emitted from the light emitting unit In order to not block the light, it must be placed so as not to overlap with the light emitting part.

However, in general, the light emitted from the light emitting portion includes not only light traveling in the main emission direction but also light traveling in a direction inclined from the main emission direction. Therefore, when the antenna is disposed on the side of the module substrate on which the light emitting unit is disposed, part of the light emitted from the light emitting unit may be blocked by the antenna, which may lead to deterioration of the light distribution characteristics of the lamp. From this, it is required to miniaturize the antenna as much as possible so that the antenna does not block part of the light emitted from the light emitting unit.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a lamp capable of maintaining the light distribution characteristic as well as the improvement of the reception sensitivity of the antenna to the wireless signal.

In order to achieve the above object, the lamp according to the present invention comprises a module substrate and a light emitting module having a plurality of light emitting portions mounted on the module substrate and having a main emission direction of light orthogonal to the module substrate, and a conductive material An antenna is formed and disposed on one side of the module substrate on which the light emitting unit is mounted so as not to overlap with the light emitting unit in the main emission direction of light, and power to the light emitting unit based on a wireless signal received by the antenna A circuit unit having a circuit for controlling supply, a housing disposed on the other surface side opposite to the one surface side of the module substrate and housing the circuit unit therein, at least a part of an antenna formed of a dielectric material And a dielectric member in contact with the

According to this configuration, the antenna is disposed on one side of the module substrate on which the light emitting unit is mounted, whereby the antenna is disposed in a housing disposed on the other side of the module substrate. Thus, the reception sensitivity of the antenna to the radio signal transmitted from the one surface of the module substrate is improved. In addition, since the dielectric member is in contact with at least a part of the antenna, the electrical length of the antenna can be made longer than the physical length of the antenna, so that the electrical length of the antenna is used according to the frequency band of the radio using the electrical length. The physical length of the antenna can be shortened while maintaining the length of the antenna to miniaturize the antenna, and furthermore, the dielectric member can be miniaturized according to the size of the antenna. Therefore, it is possible to reduce the ratio of the light blocked by the antenna and the dielectric member in the light emitted from the light emitting unit.

Therefore, while improving the reception sensitivity of the antenna to the radio signal transmitted from the one surface side of the module substrate, the miniaturization of the antenna makes it possible for the light emitted from the light emitting portion to be blocked by the antenna and the dielectric member. Since the ratio can be reduced, maintenance of the light distribution characteristic of the lamp can be achieved together with the improvement of the reception sensitivity of the antenna.

In the lamp according to the present invention, the module substrate may be annularly formed in a plan view, and the antenna and the dielectric member may be disposed inside the opening of the module substrate in a plan view. Good.

According to this configuration, the module substrate is formed in an annular shape in plan view, and the antenna and the dielectric member are disposed inside the opening of the module substrate in plan view, so that the light emission unit emits light to the outside of the module substrate Since light is not blocked by the antenna and the dielectric member, it is possible to obtain a light distribution characteristic that is line-symmetrical to a line passing through the center of the module substrate and orthogonal to the module substrate.

Further, in the lamp according to the present invention, the dielectric member may have a plate-like portion which is disposed at a predetermined distance from the module substrate and in parallel to the surface of the module substrate. .

In the lamp according to the present invention, the signal processing unit is provided on a circuit board having an electrode pad electrically connected to the antenna, and the antenna is in a rod shape bent in an L shape and A first portion formed by connecting one end portion to an electrode pad formed on a circuit board, and a rod-shaped portion, one end portion is connected to the other end portion of the first portion, and It may consist of a second part arranged along the surface.

According to this configuration, the antenna is in the shape of a rod bent in an L shape, and the first portion formed by connecting one end portion to the electrode pad formed on the circuit board, and the rod portion having the one end portion as the first portion The second part is connected to the other end of the plate and is disposed along the surface of the plate-like portion along the surface of the module substrate, so that the entire antenna can be the one side of the module substrate and the plate-like portion. Within the area that occurs between

Further, in the lamp according to the present invention, the second portion is a rod-like portion extending in a direction perpendicular to the longitudinal direction of the rod-like portion at two end portions of the rod-like portion. It may consist of a connection part which connects parts.

In the lamp according to the present invention, the length in the longitudinal direction of the other bar-like portion is longer than the length in the longitudinal direction of the one bar-like portion connected to the other end of the first portion. It is also good.

In the lamp according to the present invention, the antenna is further formed in a rod shape, and one end is connected to the other end of the second portion connected to the first portion, and the plate-like portion The semiconductor device may have a third portion projecting to the module substrate side in a form orthogonal to the surface on the module substrate side.

In the lamp according to the present invention, the antenna is further formed in a rod shape and one end is connected to the other end of the third portion where one end is connected to the second portion, and It may have a fourth portion which is arranged along a plane parallel to the surface on the module substrate side in the plate-like portion.

In the lamp according to the present invention, the antenna may be disposed inside the dielectric member.

In the lamp according to the present invention, the first portion may be further bent in a plane parallel to a surface of the circuit board on which the electrode pad is formed.

In the lamp according to the present invention, the dielectric member may be formed by embedding at least a part of the antenna.

In the lamp according to the present invention, the circuit unit includes: a power supply circuit for supplying power to the light emitting unit; a signal processing circuit for outputting a control signal corresponding to a radio signal received by the antenna; And a power control circuit that controls the power supply circuit based on a control signal input from the control unit.

Moreover, the present invention may be a luminaire including the above lamp.

1 is a partially broken perspective view showing a structure of a lamp 1 according to Embodiment 1. FIG. FIG. 2 is a cross-sectional view taken along the line A-A ′ shown in FIG. FIG. 5 is a partially broken perspective view of the lamp 1 according to Embodiment 1 in a state in which the first reflecting member and the second reflecting member are removed. FIG. 2 is a plan view showing a structure of a light emitting module according to Embodiment 1. FIG. 1 is a circuit diagram of a lighting circuit according to a first embodiment. The model used for simulation about the lamp which concerns on Embodiment 1 and the lamp which concerns on a comparative example is shown, (a), (b) shows the model of the antenna of the lamp which concerns on a comparative example, (c) shows this embodiment. It is a figure which shows the model of the antenna of the lamp | ramp which concerns. It is a comparison result of the average value of the directivity gain calculated by simulation about the lamp which concerns on Embodiment 1, and the lamp which concerns on a comparative example. It is a comparison result of the average value of the directivity gain obtained by experiment about the lamp | ramp which concerns on Embodiment 1 and the lamp | ramp which concerns on a comparative example. FIG. 7 is a cross-sectional view of a lighting fixture according to Embodiment 2. It is the partially broken perspective view of the lamp | ramp which concerns on a modification. It is a principal part perspective view in the state where the glove was removed about the lamp concerning a modification. It is a figure which shows the model of simulation of the lamp which concerns on a modification. It is a comparison result of the average value of the directivity gain computed by simulation about the lamp which concerns on a modification, and the lamp which concerns on Embodiment 1. FIG. It is a principal part perspective view in the state where the glove was removed about the lamp concerning a modification. It is a figure which shows the model of simulation of the lamp which concerns on a modification. It is a comparison result of the average value of the directivity gain computed by simulation about the lamp which concerns on a modification, and the lamp which concerns on Embodiment 1. FIG. It is sectional drawing of the lamp | ramp which concerns on a modification. It is sectional drawing of the light-scattering member which concerns on a modification, and an antenna. It is sectional drawing of the light-scattering member which concerns on a modification, and an antenna. It is sectional drawing of the light-scattering member which concerns on a modification, and an antenna. It is sectional drawing of the light-scattering member which concerns on a modification, and an antenna. The light-scattering member and antenna which concern on a modification are shown, (a) is sectional drawing, (b) is a perspective view. The light-scattering member and antenna which concern on a modification are shown, (a) is sectional drawing, (b) is a perspective view. It is sectional drawing which shows the light-scattering member and antenna which concern on a modification. The light-scattering member and antenna which concern on a modification are shown, (a) is sectional drawing, (b) is a perspective view. It is sectional drawing which shows the light-scattering member and antenna which concern on a modification.

Embodiment 1
<1> Configuration The overall configuration of the lamp 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a partially broken perspective view of the lamp 1, and FIG. 2 is a cross-sectional view cut along a line AA 'in FIG. In FIG. 2, an alternate long and short dash line drawn along the vertical direction of the drawing shows the lamp axis J of the lamp, the upper part of the drawing being the front of the lamp 1 and the lower part of the drawing being the rear of the lamp 1. In FIG. 2, the circuit unit 90 is not a cross-sectional view.

As shown in FIGS. 1 and 2, the lamp 1 is attached to the light emitting module 10 having the light emitting unit 13, the base 20 to which the light emitting module 10 is attached, and the base 20 so as to cover the light emitting module 10. , A circuit unit 90 including a circuit constituting a power supply unit for supplying power to the light emitting unit 13, a circuit case 40 in which the circuit unit 90 is disposed inside, and a circuit together with the circuit case 40 inside A housing 50 for housing the unit 90, a base 60 for receiving power supplied to the lighting unit 90 from the outside, a first reflecting member 70 for reflecting light emitted from the light emitting portion 13 and a second reflection And a member 80.
<1-1> Light Emitting Module The light emitting module 10 includes a module substrate 11 and a plurality of light emitting units 13 disposed on the module substrate 11.

As shown in FIG. 4, the module substrate 11 is formed in a substantially annular shape having a substantially circular hole 11 a at the center, and a mounting portion 11 c on which a plurality of light emitting portions 13 are mounted; It consists of a tongue piece 11d extending from the location toward the center of the hole 11a. A connector 17 to which

lead wires

91a and 91b (see FIG. 2) derived from the lighting circuit 90 are connected is provided on the rear surface of the tongue piece 11d. Then, by connecting the

lead wires

91 a and 91 b to the connector 17, the light emitting module 10 and the lighting circuit 90 are electrically connected.

The light emitting unit 13 includes two semiconductor light emitting devices 13 a and a sealing body 13 b which is formed in a substantially rectangular parallelepiped shape and seals the two semiconductor light emitting devices 13 a. Then, a plurality of (16 in FIG. 1) light emitting units 13 are annularly arranged at equal intervals along the circumferential direction of the mounting unit 11 a. That is, the plurality of light emitting units 13 are radially disposed about the lamp axis J when the module substrate 11 is viewed in plan. The light emitting unit 13 has a main emission direction of light orthogonal to the module substrate 11 (forward along the lamp axis J).

Although the sealing body 13 b is mainly made of a translucent material, when it is necessary to convert the wavelength of the light emitted from the semiconductor light emitting element 9 into a predetermined wavelength, the wavelength of the light is used as the translucent material. The wavelength conversion material to be converted is mixed. A silicone resin can be used as the translucent material, and phosphor particles can be used as the wavelength conversion material. In the present embodiment, a semiconductor light emitting element 13a for emitting blue light and a sealing body 13b formed of a translucent material mixed with phosphor particles for wavelength converting blue light to yellow light are adopted. A part of the blue light emitted from the semiconductor light emitting element 13a is wavelength-converted to yellow light by the sealing body 13b, and white light generated by mixing of unconverted blue light and converted yellow light is emitted. It is emitted from the part 13.

When the illumination color of the lamp 1 is changed based on the wireless signal, for example, the semiconductor light emitting device 13a emitting ultraviolet light and the phosphor particles emitting light of three primary colors (red, green and blue) are used as the semiconductor light emitting module 2. It can be realized by using a combination of Further, as the wavelength conversion material, a material including a semiconductor, a metal complex, an organic dye, a pigment, or the like, which absorbs light of a certain wavelength and emits light of a wavelength different from the absorbed light may be used.
<1-2> Base The base 20 has a substantially cylindrical shape having a through hole 20a, and the cylinder axis of the base 20 is disposed in a posture in which it coincides with the lamp axis J. In the base 20 shown in FIG. 2, the front surface 20 b and the rear surface 20 c are both substantially annular flat surfaces. The light emitting modules 10 are mounted on the front surface 20a of the base 20, whereby the light emitting units 13 are planarly disposed with their main emission directions directed forward. The light emitting module 10 is fixed to the base 20 using a screw. Further, the base 20 is formed of a material having high thermal conductivity, and for example, Al, Ag, Au, Ni, Rh, Pd, an alloy of two or more of them, an alloy of Cu and Ag, etc. Is formed of a metal material of
<1-3> Globe The globe 30 has a shape that simulates a bulb of A-shaped bulb that is a general bulb shape, and press-fit the opening side end 30 b of the globe 30 into the front side end 50 b of the housing 50 Thus, the light emitting module 10 is fixed to the housing 50 in a state of covering the front of the module substrate 11 of the light emitting module 10.

The inner surface 32 of the globe 30 is subjected to a diffusion process for diffusing the light emitted from the light emitting unit 13, for example, a diffusion process using silica, a white pigment, or the like. The light incident on the inner surface 32 of the globe 30 passes through the globe 30 and is extracted to the outside of the globe 30.
<1-4> Circuit Case The circuit case 40 has a substantially cylindrical shape with both sides open, and includes a large diameter portion 42 and a small diameter portion 43. A circuit unit 90 is accommodated in the large diameter portion 42 located on the light emitting module 10 side. Further, the base 60 is externally fitted to the small diameter portion 43 located on the base 60 side, whereby the opening 43a on the base 60 side of the circuit case 40 is closed. The circuit case 40 is formed of a nonconductive material such as a resin. For example, a synthetic resin (specifically, polybutylene terephthalate (PBT)) can be adopted as the nonconductive material.

The large diameter portion 42 of the circuit case 40 is inserted through the through hole 20 a of the base 20, and a part of the circuit unit 90 is also inserted through the through hole 20 a of the base 20 while being accommodated in the circuit case 40. ing. The circuit case 40 is disposed in the lamp 1 so as not to contact the base 20 and the module substrate 11. This is for the heat generated in the light emitting module 10 to be less likely to be conducted to the circuit case 40, thereby suppressing the temperature rise of the circuit case 40 and reducing the thermal load on the circuit unit 90.

Further, through holes 42 a are provided in the circuit case 40 at positions corresponding to the tongue pieces 11 d of the module substrate 11. The distal end of the tongue piece 11 d is inserted into the circuit case 40 through the through hole 42 a, whereby the connector 17 provided on the tongue piece 11 d is disposed in the circuit holder 7.
<1-5> Housing The housing 50 has a cylindrical shape which is open at both ends and reduced in diameter from the front to the rear. As shown in FIG. 2, the base 20 and the opening end 30 b of the glove 30 are disposed in the front end 50 b of the housing 50, and the housing 50 is fixed to the base 20 by caulking. It is done. Further, the outer peripheral edge of the rear side end of the base 20 is tapered according to the shape of the inner peripheral surface 50 a of the housing 50. Since the tapered surface is in surface contact with the inner circumferential surface 50 a of the housing 50, the heat conducted from the light emitting module 10 to the base 20 is more easily conducted to the housing 50. Then, the heat conducted to the housing 50 is further conducted to the base 60 through the small diameter portion 43 of the circuit case 40, and is dissipated from the base 60 toward the lighting apparatus (not shown). The housing 50 is a cylindrical member made of a material having high heat radiation, and the base 20 is provided on the glove 30 side. As the material having high thermal conductivity, for example, metal materials as listed in the description of the base 20 can be used.
<1-6> Base A base 60 is a member for receiving power from the socket of the lighting apparatus when the lamp 1 is attached to the lighting apparatus. As the type of the base 60, an Edison type E26 base is used. The base 60 includes a shell 61 having a substantially cylindrical shape and having an external thread portion on an outer wall, and an eyelet 63 attached to the shell 61 via the insulating portion 62. An insulating member 64 is interposed between the shell 61 and the housing 50. Here, a lead wire 92 a derived from the circuit unit 90 is connected to the shell 61, and a lead wire 92 b derived from the circuit unit 90 is connected to the eyelet 63.

<1-7> First Reflecting Member As shown in FIGS. 1 and 2, the first reflecting member 70 is cylindrical, and has a substantially cylindrical main body 71 with both sides opened, and a main body 71. And a substantially disc-shaped mounting portion 72 for closing the rear side opening of the housing. The first reflection member 70 is formed of a resin such as polycarbonate. The first reflection member 70 is attached such that the outer peripheral edge of the mounting portion 72 is mounted on the inner peripheral edge of the module substrate 11 of the light emitting module 10.

The main body portion 71 has a substantially cylindrical shape whose outer diameter is larger on the front side than on the rear side, and the cylinder axis thereof coincides with the lamp axis J. The outer peripheral surface of the main body portion 71 is substantially annular when the front side is viewed from the rear side along the lamp axis J, and covers the plurality of light emitting portions 13 arranged in an annular manner on the module substrate 11 .

As shown in FIG. 1, the first reflection member 70 extends along the circumferential direction of the outer peripheral surface 71b of the main body 71 around the cylinder axis of the main body 71 over the main body 71 and the attachment 72. A plurality of openings 71a are provided at intervals. Specifically, the same number of intervals along the circumferential direction of the outer peripheral surface 71b is made so that the 16 openings 71a equal to the number of light emitting units 13 of the light emitting module 10 face the light emitting units 13 in a one-to-one relationship The space is provided in the main body 71. The opening 71a has a substantially square shape in a plan view, and in the opening 71a, a portion on the cylinder axis side which is about half of the light emitting portion 13 is located in the opening 71a, and the opposite side to the other cylinder axis Is covered by the main body 71. That is, about half of the light emitting part 13 is exposed from the opening 71 a and the other half is hidden by the main part 71. Then, a part of the light emitted from the light emitting unit 13 is reflected by the outer peripheral surface 71 b of the main body 71.

<1-8> Second Reflecting Member The second reflecting member 80 is composed of a substantially cylindrical main body 80a and a bottomed cylindrical lid 80b closing the front opening of the main body 80a. On the front side of the outer peripheral surface of the main body portion 80a, a collar portion 80c having a shape gradually expanding in diameter from the rear to the front is formed over the entire circumference. Thus, the main body 80a exhibits a function of reflecting a part of the light emitted from the light emitter 13 in the direction intersecting the lamp axis J on the outer peripheral surface.

The entire second reflective member 80 is formed of a resin material having a relative dielectric constant of about 3.0 to 3.5. As this resin material, polycarbonate resin etc. are mentioned, for example.

Here, the lid 80b of the second reflection member 80 extends in the direction intersecting the plate-like portion 80b1 from the entire periphery of the plate-like portion 80b1 formed in a plate shape having a circular plan view and the plate-like portion 80b1. It comprises the side wall 80b2 which came out. The second reflection member 80 is disposed so as not to overlap the light emitting unit 13 in the main emission direction of the light emitting unit 13 (the direction orthogonal to the module substrate 11).

<1-9> Circuit Unit The circuit unit 90 includes a power supply circuit that supplies power to the light emitting unit 13, a signal processing circuit that outputs a control signal according to a wireless signal received by the antenna 94, and an input from the signal processing circuit. And a power control circuit that controls the power supply circuit based on the control signal.

Specifically, as shown in FIG. 2, the circuit unit 90 includes a circuit board 90a, various circuit elements 93 disposed on the circuit board 90a, an antenna 94, a diode bridge 95, and signal processing. It includes an IC 96, an LED driver IC 97, a power supply IC 98, and an oscillator (not shown) that generates a clock signal for driving the signal processing IC 96, the LED driver 97, and the like. In FIG. 2, only some of the circuit elements are denoted by “93”. The circuit unit 90 is housed in the circuit case 40 and fixed to the circuit case 40 by screwing or the like.

The circuit board 90a is provided with an electrode pad 90b made of metal and a wiring pattern (not shown). The electrode pad 90 b is electrically connected to the antenna 94. A feed path between the signal processing circuit and the antenna 94 is formed by the wiring pattern and the electrode pad 90b. In addition, the circuit board 90 a is disposed such that its main surface is parallel to the lamp axis J.

The antenna 94 is configured of a first portion 94a formed in an L-shape and a second portion 94b formed in a U-shape and connected to the tip of the first portion 94a. Specifically, the first portion 94a is configured of a rod-like protrusion which protrudes in a direction perpendicular to the surface of the circuit board 90a, and a rod-like extension which extends upward in the longitudinal direction from the tip of the protrusion. It is done. The second portion 94b has the same length in the longitudinal direction as the rod-like member extending in the direction along the upper end of the circuit board 90a from the tip of the first portion 94a, and the circuit board 90a Two rod-like members spaced apart in the orthogonal direction and a rod-like connection in which the two rod-like members are connected in the direction orthogonal to the circuit board 90a at the end opposite to the side continuing to the first portion 94a It is comprised from the member. Here, the length in the longitudinal direction of the protruding portion of the first portion 94 a and the length of the connecting member of the second portion 94 b are substantially the same.

FIG. 3 shows a partially broken perspective view of the lamp 1 with the first reflecting member 70 and the second reflecting member 80 removed.

As shown in FIG. 3, in the antenna 94, the antenna 94 protrudes from the opening 11 a inside the module substrate 11. Then, in a state in which the second reflection member 80 is attached, the plate-like portion 80b1 of the second reflection member 80 is in contact with the second portion 94b of the antenna 94, as shown in FIG. The antenna 94 is disposed so as not to overlap the light emitting unit 13 in the main emission direction of the light emitting unit 13 (the direction orthogonal to the module substrate 11).
<2> Circuit Configuration of Circuit Unit A circuit diagram of the circuit unit 90 is shown in FIG.

The circuit unit 90 has the power supply terminals TP1 and TP2 connected to the base 60 through the

lead wires

92a and 92b, and the output terminals TL1 and TL2 connected to the light emitting module 10 through the

lead wires

91a and 91b. Then, AC power is supplied to the power supply terminals TP1 and TP2 from the external AC power supply AC through the base 60 and the

lead wires

92a and 92b. Further, DC power is supplied from the output terminals TL1 and TL2 to the light emitting module 10 through the

lead wires

91a and 91b. Here, as shown in FIG. 5, the light emitting module 10 is formed by connecting in parallel four sets of series circuits in which eight LEDs are connected in series.

As shown in FIG. 5, the circuit unit 90 is connected between a rectifying and smoothing circuit U1 which rectifies and smoothes alternating current input to the power supply terminals TP1 and TP2 and is output, and is connected between the output terminals of the rectifying and smoothing circuit U1. Power supply circuit U2 for stepping down a voltage generated between the output terminals of the power supply terminals between the output terminals TL1 and TL2, a signal processing circuit U3 for outputting a control signal corresponding to a radio signal received by the antenna 94, and a signal processing circuit And a power control circuit U4 that controls the power supply circuit based on the control signal input from
<2-1> Rectification smoothing circuit Rectification smoothing circuit U1 is for preventing that an overcurrent flows into the diode bridge 95 and the diode bridge 95 which rectify the alternating current input through the nozzle | cap | die 60 from external AC power supply, A fuse FUSE and a smoothing capacitor C1 for smoothing a pulsating current output from the diode bridge 95 are provided. Here, as the smoothing capacitor C1, a high withstand voltage electrolytic capacitor or the like is used. The output terminal on the low potential side of the rectifying and smoothing circuit U1 is connected to the ground potential GND.
<2-2> Power Supply Circuit The power supply circuit U2 includes a so-called step-down DC-DC converter for stepping down a DC voltage supplied from the output terminal of the rectifying and smoothing circuit U1, and a field effect transistor (FET: Field Effect Transistor) And the diode D1 whose cathode is connected to the high potential side output terminal of the rectifying and smoothing circuit U1 and whose anode is connected to the drain of the switching element 97a, and one end is the drain of the switching element 97a and the diode D1. An inductor L1 connected to a connection point with the anode, and a capacitor C2 connected between an output end on the high potential side of the rectifying and smoothing circuit U1 and the other end of the inductor L1. Then, a voltage between both ends of the capacitor C2 is supplied to the light emitting module 10 through the output terminals TL1 and TL2.

Here, the switching element 97a is connected to a control circuit 97b which inputs a signal voltage to its gate. The control circuit 97b performs on / off control of the switching element 97a by inputting a signal voltage to the gate of the switching element 97a, and steps down the output voltage of the rectifying and smoothing circuit U1 to a desired voltage. Specifically, a voltage control oscillator (not shown) incorporated in the control circuit 97b is connected to the gate of the switching element 97a, and a pulse train signal voltage from the voltage control oscillator is input.

As shown in FIG. 5, the switching element 97 a and the control circuit 97 b are provided in a package of one LED driver IC 97. The LED driver IC 97 is NXP's SSL 2108. In addition, you may use MIP551 grade | etc., Of Panasonic Corporation as this LED driver IC97.
<2-3> Signal Processing Circuit The signal processing circuit U3 mainly includes an antenna 94, a signal processing IC 96, and a power supply IC 98 for supplying power to the signal processing IC 96.

The antenna 94 adopts a standard corresponding to a radio signal to be used. The wireless signal includes an instruction to control lighting of the lamp 1 and can be used universally used in a communication device conforming to the Institute of Electrical and Electronics Engineers (IEEE) 802.15.4 standard. A radio signal in a frequency band of 2.4 GHz can be used. Note that IEEE 802.15.4 is a name of a short distance wireless network standard called PAN (Personal Area Network) or W (Wireless) PAN.

The signal processing IC 96 generates a control signal for controlling the power supplied from the power supply circuit U2 to the light emitting unit 13 based on the wireless signal received by the antenna 94, and outputs the control signal to the power control circuit U4. As the signal processing IC 96, NXP JN 5142 or JN 5148 is used.

In the signal processing IC 96, when a signal obtained by receiving the antenna 94 is input to the first pin, the signal is converted into a predetermined control signal and output from the fourth pin. The second pin is a ground terminal of the antenna 94. The third pin is a ground terminal of the signal processing IC 96, and is connected to the ground potential via a capacitor C4. The fifth pin is a voltage output terminal and outputs a reference voltage of a predetermined magnitude. The sixth pin is a power supply terminal connected to the power supply IC 98, to which a voltage supplied from the power supply IC 98 is input. The seventh and eighth pins are short-circuited through the inductor L2.

The power supply IC 98 is a booster circuit, which boosts the voltage generated between the output terminals of the rectifying and smoothing circuit U1 and inputs the boosted voltage to the power supply terminal of the signal processing IC 96.
<2-4> Power Control Circuit The power control circuit U4 mainly controls the control signal detection circuit U4a that inverts and outputs the control signal output from the signal processing circuit U3 and a switching element according to the output voltage of the control signal detection circuit U4a. A control circuit 97b changes the frequency of the signal voltage input to the gate of 97a.

The control signal detection circuit U4a includes a switching element TR1 formed of a MOS transistor, a resistor R2 connected between the gate of the switching element TR1 and the third pin of the signal processing IC 96, the fifth pin of the signal processing IC 96 and the switching element And a resistor R1 connected between the drain of TR1. Here, in the control signal detection circuit U4a, when the signal voltage of the control signal input from the fourth pin of the signal processing circuit U3 to the gate of the switching element TR1 via the resistor R2 increases, the drain current of the switching element TR1 decreases. As a result, the voltage input to the third pin of the LED driver IC 97 is increased. On the other hand, when the signal voltage of the control signal input to the gate of the switching element TR1 decreases, the drain current of the switching element TR1 increases and the voltage input to the third pin of the LED driver IC 97 decreases.

The control circuit 97 b is included in the voltage control IC 97 as described above. Here, the first pin of the voltage control IC 97 is a power supply terminal. The second pin is a voltage supply terminal, and supplies a voltage of a predetermined magnitude to the fifth pin, which is a power supply terminal of the signal processing IC 96, and the control signal detection circuit U4a. A voltage corresponding to the signal voltage of the control signal is input to the third pin from the control signal detection unit U4a.

Then, the control circuit 97 b lowers the oscillation frequency of a voltage control oscillator (not shown) built in the voltage control IC 97 as the voltage level input to the third pin decreases. That is, as the voltage level input from the control signal detection circuit U4a to the third pin decreases, the voltage supplied from the power supply circuit U2 to the light emitting module 10 via the output terminals TL1 and TL2 decreases.
About the result of <3> simulation About the result of having compared the average value of the directivity gain computed by simulation about antenna 94 with which lamp 1 concerning this embodiment is equipped, and

antenna

194 and 294 concerning a comparative example, and FIG. This will be described based on FIG. In the following description, the X, X ', Y, Y', Z, and Z 'directions correspond to the X, X', Y, Y ', Z, and Z' directions in the figure.

In the simulation, each

antenna

94, 194, 294 is formed of a circular rod member having a cross section of 1 mm in diameter, and one end is connected to a thin copper plate 190 having a rectangular shape in plan view. Here, the copper plate 190 corresponds to the vicinity of the surface of the circuit board 90a on the surface of which the pattern of the copper wiring is formed. Then, when a high frequency of 2450 MHz was applied to each of the

antennas

94, 194, and 294 from the signal source, the average value of the directional gain was calculated.

Here, the directivity gain indicates the power ratio to the isotropic antenna. That is, when the directivity gain in a predetermined direction is transmitted by an antenna of Ga (Ga is a constant), it is possible to transmit power Ga times that of an isotropic antenna. Then, according to the reciprocity theorem, even when an antenna having a directional gain of Ga in a predetermined direction is used for a receiving antenna, it is possible to receive power Ga times that of an isotropic antenna. Therefore, the larger the directional gain, the better the reception sensitivity.

FIGS. 6 (a) and 6 (b) show the structures of the

antennas

194 and 294 according to Comparative Examples 1 and 2, and FIG. 6 (c) shows the structure of the antenna 94 according to the present embodiment. It is

As shown in FIG. 6A, in the simulation model of the antenna 194 according to the comparative example 1, the X direction from the end in the XX ′ axis direction of the copper plate 190 of 16 mm long × 18 mm wide arranged in the XY plane is X The first portion 194a is connected to a portion separated by 3 mm in the direction and separated by 5 mm in the Y ′ direction from one end in the YY ′ axial direction. The first portion 194a is formed in an L shape including a protruding portion protruding by 3 mm in the Z direction and an extending portion extending 10 mm in the Y direction from the tip of the protruding portion. The second portion 194 b extends 12.5 mm in the X direction from the other end of the first portion 194 a.

Further, as shown in FIG. 6B, the simulation model of the antenna 294 according to the comparative example 2 includes a first portion 294a having the same shape as that of the comparative example 1 and 12 in the X direction from the other end of the first portion 194a. A rod-like first leg extending by 5 mm, and a rod-like second leg which has the same longitudinal length as the first leg and is separated by 3 mm in the Z ′ direction, and 2 A second portion 294b formed in a U-shape having a bar-like connecting portion connecting the two legs in the ZZ ′ axial direction at the end opposite to the side continuing to the first portion 294a There is.

And as shown in FIG.6 (c), although the simulation model of the antenna 94 which concerns on this Embodiment is the same as that of the simulation model of the antenna 294 which concerns on the comparative example 2, it contacts on the Y direction side of 2nd site | part 294b. Comparative Example 2 is different from Comparative Example 2 in that a dielectric member 180 having a plate shape of 1 mm in thickness and a dielectric constant of 3.5 is disposed. The dielectric member 180 corresponds to the plate-like portion 80 b 1 of the second reflecting member 80.

FIG. 7 shows the result of calculating the average value of the directivity gain for the simulation models of the

antennas

94, 194 and 294 having the structures shown in FIGS. 6 (a) to 6 (c). As shown in FIG. 7, in the models shown in FIGS. 6A and 6B, the average value of the directivity gain is -9.3 dB and -6.3 dB in the model shown in FIG. It was found that the average value of the directivity gain was improved to -5.3 dB. In particular, when the structures shown in FIGS. 6B and 6C are compared, an improvement of about 1.0 dB in directivity gain is observed only when a part of the antenna 94 is in contact with the dielectric member 190. . This is because the antenna 94 contacts the dielectric member 190, the high dielectric constant (specific dielectric constant) of the dielectric member 190 shortens the wavelength of the high frequency current flowing through the antenna 94, and the wavelength of the high frequency current flowing through the antenna 94 There is an effect that the length can be shortened and the length for the wavelength of the antenna 94 (here, referred to as the electrical length) can be increased. It is considered that this indicates that the electrical length of the antenna 94 can be made close to 1⁄4 wavelength.
<4> About experimental results The directivity of the lamp 1 having the configuration shown in FIGS. 1 to 3 and the lamp from which the second reflection member 80 of the lamp 1 is removed (hereinafter referred to as the lamp according to Comparative Example 3). The result of measuring the distribution of the gain will be described based on FIG.

In the experiment, the distribution of the directional gain around the antenna 94 was measured when a high frequency of 2450 MHz and a power of 1 mW was supplied to the antenna 94. Here, measurement is made with respect to vertical polarization components (components in which the amplitude direction of the electric field is perpendicular to the ground) and horizontal polarization components (components in which the amplitude direction of the electric field is horizontal to the ground) contained in radio waves radiated around the antenna 94. Did. The experimental data shows the value of relative directivity gain based on the distribution of directivity gain obtained when 1 mW of power is supplied to a standard dipole antenna. The X direction in FIGS. 8A and 8B is a direction parallel to the module substrate 11 and the circuit substrate 90a, and the Y direction in FIGS. 8A and 8B is parallel to the module substrate. And it is a direction orthogonal to the circuit board 90a.

In the lamp 1 according to the present embodiment, the distribution of directivity gain as shown in FIG. 8A is obtained, and the average value of the directivity gain of the vertical polarization component is -6.98 dBd, the horizontal polarization component The average value of the directivity gain of was obtained as -14.14 dBd.

On the other hand, in the lamp according to Comparative Example 3, substantially the same distribution as that of the directivity gain shown in FIG. 8A as shown in FIG. 8B is obtained, and the directivity gain of the vertical polarization component is The average value was -7.34 dBd, and the average value of the directivity gain of the horizontal polarization component was -14.71 dBd.

As the experimental results show, covering the periphery of the antenna 94 with the second reflecting member 80 does not affect the distribution of directivity gain around the antenna 94. Therefore, it is considered that the influence of the reflection of the radio wave entering and exiting the antenna 94 on the peripheral wall of the second reflecting member 80 can be ignored. Also, as the experimental results show, even if the shape of the antenna 94 is the same, the average value of the directivity gain is about 0.35 dBd to about 0.55 dBd simply by bringing the second reflecting member 80 into contact with the antenna 94. It can be improved. This makes it possible to lengthen the electrical length of the antenna 94 while making the physical length of the antenna 94 the same, by bringing the second reflecting member 80 made of a dielectric material into contact with the antenna 94. It is considered that the receiving sensitivity could be improved.

After all, in the lamp 1 according to the present embodiment, the antenna 94 is disposed on the other surface side of the module substrate 11 by projecting the antenna 94 on the one surface side of the module substrate 11 on which the light emitting unit 13 is mounted. Compared with the case where it is disposed in the housing 50, the reception sensitivity of the antenna 94 to the radio signal transmitted from the one surface side of the module substrate 11 is improved. Further, since the second reflecting member 80 is in contact with at least a part of the antenna 94, the electrical length of the antenna 94 can be made longer than the physical length of the antenna 94. While maintaining the length, the physical length of the antenna 94 can be shortened to miniaturize the antenna 94. Furthermore, by arranging the antenna 94 and the second reflecting member 80 so as not to overlap with the light emitting portion 13 in plan view, the antenna 94 and the second reflecting member 80 among the light emitted from the light emitting portion 13 It is possible to reduce the proportion of light blocked by the That is, the light distribution characteristic of the lamp 1 can be maintained as well as the reception sensitivity of the antenna 94 can be improved.

In addition, the wireless communication using the wireless signal in the above-mentioned frequency band has a longer wavelength than conventional infrared communication. Therefore, good communication can be performed even when the line of sight between the transmitter side and the receiver side (that is, the lamp 1 side) of the radio signal is not good.

By the way, in the above-mentioned IEEE 802.15.4 standard, in the case of a group consisting of a plurality of receivers having the same address, if there is one receiver paired with the transmitter of the radio signal, the same as the receiver. The receivers belonging to the group can communicate with each other without using the transmitter. Therefore, if a plurality of lamps are set as a group having the same address, the transmitter transmits a control signal to only one lamp belonging to the group to control all other lamps belonging to the same group. be able to. Such a function is particularly effective when it is desired to control the lighting of a plurality of lamps uniformly, as in the case of controlling the lighting of lighting fixtures such as chandeliers provided with a plurality of lamps and located in bulky places. is there.
Second Embodiment
The structure of a lighting device 501 according to the present embodiment is shown in FIG.

The lighting device 501 includes the lamp 1 according to the first embodiment and a lighting fixture 503. Here, the lighting fixture 503 is a so-called lighting fixture for downlight.

The lighting fixture 503 is connected to a socket 505 which is electrically connected to the lamp 1 and holds the lamp, a bowl-shaped reflection plate 507 which reflects light emitted from the lamp 1 in a predetermined direction, and an external commercial power supply. And a connection unit 509.

The reflecting plate 507 here is attached to the ceiling 511 such that the socket 505 side is located on the back side of the ceiling 511 via the opening 513 of the ceiling 511.

In addition, the structure of the illuminating device shown in FIG. 9 is a mere example, and is not limited to the above-mentioned lighting fixture for downlights. Further, in the illumination device 501, the lamp axis of the lamp 1 is disposed to coincide with the axis of the wedge-shaped reflection plate 507, but the lamp axis of the lamp 1 is obliquely with respect to the axis of the reflection plate 507 It may be arranged to be This has the effect of being able to connect to a diagonal installation-only instrument. Furthermore, part of the circuit unit of the lamp 1 may be provided on the lighting apparatus side instead of in the lamp 1. As a result, there is an effect that the size and weight of the lamp can be reduced.
<Modification>
(1) In the first embodiment, an example in which a part (the second portion 94b) of the antenna 94 is in contact with the plate-like portion 80b1 of the second reflecting member 80 has been described. Absent. For example, as shown in FIG. 10, the lamp 2 may be one in which a part of the antenna 94 is embedded in a dielectric member 82 made of a dielectric material.

According to this modification, since the length of the portion of antenna 94 in contact with dielectric member 82 can be increased, the physical length of antenna 94 can be further shortened, and the overall size of antenna 94 can be further reduced. The effect is that it is possible to

(2) In the first embodiment, the second portion 94b of the antenna 94 extends from the tip end of the first portion 94a in the direction along the upper end of the circuit board 90a, and the length in the longitudinal direction The two rod-like members having the same length and being spaced apart in the direction orthogonal to the circuit board 90a, and the circuit board 90a at the end opposite to the side where the two rod-like members are continuous with the first portion 94a. Although the example comprised from the rod-shaped member connected in the direction orthogonal to was demonstrated, it is not limited to this.

For example, as shown in FIG. 11A, the length of one of two rod-like members which are arranged to be parallel to each other and which constitute the second portion 394b is compared with the length of the other. A long antenna (see the circled portion in FIG. 11A) may be provided with an antenna 394 (hereinafter referred to as an antenna 394 according to the first modification). As a result, the length of the antenna can be increased, and the radiation gain can be improved. The description of the effect is shown in FIG. 13 described later.

Alternatively, as shown in FIG. 11B, of the two rod-like members other than the one connected to the first portion 94a, the other rod-like member from the tip end to the module substrate 11 side in the plate-like portion 80b1 The antenna 1394 (hereinafter, referred to as an antenna 1394 according to the modification example 2) having a rod-like third portion 394c projecting to the module substrate 11 side in a form orthogonal to the surface may be provided. As a result, the length of the antenna can be further increased, and the radiation gain can be improved.

Furthermore, as shown in FIG. 11C, one end is connected to the other end of the third portion 394c which is formed in a rod shape and one end is connected to the second portion 394b, and a plate-like portion An antenna 2394 (hereinafter, referred to as an antenna 2394 according to the third modification) having a fourth portion 394d arranged in a form parallel to a plane parallel to the module substrate 11 side in 80b1 may be provided. . As a result, it is possible to further extend the antenna length and to obtain an effect of improving the radiation gain.

About the antenna 94 with which the lamp 1 which concerns on this Embodiment, and the

antennas

394, 1394, and 2394 which concern on each modification, the result of having compared the average value of the directivity gain computed by simulation is demonstrated using FIG. The X, X ', Y, Y', Z, and Z 'directions in the following description correspond to the X, X', Y, Y ', Z, and Z' directions in FIG.

In the simulation, each of the

antennas

394, 1394, and 2394 is formed of a circular rod member having a cross section of 1 mm in diameter, and one end thereof is connected to a thin copper plate 190 having a rectangular shape in plan view. Then, when a high frequency of 2450 MHz is applied to each of the

antennas

394, 1394, and 2394 from the signal source, the directivity gain in all directions is calculated, and the average value of the calculated directivity gains in all directions is calculated.

As shown in FIG. 12A, the simulation model of the antenna 394 according to the first modification is 12.5 mm in the X direction from the first portion 94a having the same shape as that of the first embodiment and one end of the first portion 94a. And a rod-like second leg extending by 2 mm in the longitudinal direction from the first leg and separated by 3 mm in the ZZ ′ axial direction. A U-shaped second portion 394b is formed of a bar-like connecting portion connecting the two legs at the end opposite to the side continuing to the first portion 94a in the ZZ 'axial direction. Have.

Further, as shown in FIG. 12B, the simulation model of the antenna 1394 according to the second modification includes a first portion 94a and a second portion 394b having the same shape as the antenna 394 according to the first modification, and a dielectric member 180. And a rod-shaped third portion 394 c protruding in the Y ′ direction.

Furthermore, as shown in FIG. 12C, the simulation model of the antenna 2394 according to the third modification includes a first portion 94a, a second portion 394b, and a third portion 394c having the same shape as the antenna 1394 according to the second modification. A fourth portion 394 d is formed in a rod shape, and connected to an end portion of the third portion 394 c on the Y ′ direction side and arranged to extend along the X direction.

About the simulation model which shows the

antennas

394, 1394, and 2394 which concern on each modification shown in FIG. 12 (a) thru | or (c), and the antenna 94 which concerns on Embodiment 1 shown in FIG.6 (c) in FIG. The result of having calculated the average value of directivity gain is shown. As shown in FIG. 12, in the model shown in FIG. 6 (c), the average value of the directivity gain is -5.3 dB, whereas in the models shown in FIGS. 11 (a) to (c), The average directivity gain is improved to -4.8 dB, -4.2 dB, and -4.8 dB.

That is, with the

antennas

394, 1394, and 2394 according to the first to third modifications, the reception sensitivity can be further improved compared to the antenna 94 according to the first embodiment.

(3) In the first embodiment, the first portion 94a of the antenna 94 is a protrusion which protrudes in a direction perpendicular to the surface of the circuit board 90a, and an extension which extends upward in the vertical direction from the tip of the protrusion Although the example which has L shape comprised from and was demonstrated, it is not limited to this.

For example, as shown in FIG. 14A, a first portion 494a bent in a plane parallel to the surface on which the electrode pad 90b is formed in the circuit board 90a, and an electrode at the first portion 494a formed in a rod shape Even if it is provided with an antenna 494 having a second portion 494b connected to the other end opposite to the one end connected to the pad 90b (hereinafter referred to as the antenna 494 according to the fourth modification). Good. Specifically, the antenna 494 may have a first portion 494a bent in a substantially S-shape in a plane parallel to the plane on which the electrode pad 90b is formed in the circuit board 90a. By adopting these structures, there is an effect that the length of the antenna can be further extended and the radiation gain can be improved.

Alternatively, as shown in FIG. 14B, the plate portion 80b1 is orthogonal to the surface on the module substrate 11 side from the other end opposite to the one end connected to the first portion 494a in the second portion 494b. An antenna 1494 (hereinafter, referred to as an antenna 1494 according to the fifth modification) having a rod-like third portion 494c protruding to the module substrate 11 side in the form of an arrow may be provided. By adopting these structures, it is possible to increase the length of the antenna while maintaining the compact shape of the antenna, and to obtain the improvement of the radiation gain.

In the first embodiment, an example is described in which the antenna 94 having a length in the longitudinal direction of the protruding portion of the first portion 94a and a length of the connecting member of the second portion 94b is substantially the same. It is not something to be done. For example, as shown in FIG. 14C, the length of the connecting member of the second portion 94b is longer than the length of the projecting portion of the first portion 94a in the longitudinal direction. The antenna 594 according to the present invention may be provided. By adopting this structure, it is possible to make the length of the antenna further longer while making the most of the external dimensions of the second reflecting member, and to obtain an improvement in the radiation gain.

About the antenna 94 with which the lamp | ramp 1 which concerns on this Embodiment is equipped, and the

antenna

494,1494,594 which concerns on a modification, the result of having compared the average value of the directivity gain computed by simulation is demonstrated. The X, X ', Y, Y', Z, and Z 'directions in the following description correspond to the X, X', Y, Y ', Z, and Z' directions in the figure.

In the simulation, each of the

antennas

494, 1494, and 594 is formed of a circular rod member having a cross section of 1 mm in diameter, and one end thereof is connected to a thin copper plate 190 having a rectangular shape in plan view. Then, when a high frequency of 2450 MHz frequency was applied from the signal source to each of the

antennas

494, 1494 and 594, the average value of the directivity gain was calculated.

As shown in FIG. 15A, the simulation model of the antenna 494 according to the fourth modification is composed of a first portion 494a and a second portion 494b. Here, the first portion 494a is a protrusion extending by 3 mm in the Z direction, and Y of the first extension and the first extension extending 7 mm in the Y direction from the tip of the protrusion in the Z direction. Shape consisting of a second extension that extends 12.5 mm in the X direction from the tip of the direction and a third extension that extends 3 mm in the Y direction from the tip of the second extension in the X direction Have. That is, the portion including the first extending portion, the second extending portion, and the third extending portion in the first portion 494a is bent in a plane (in the XY plane) parallel to the surface of the copper plate 190. . The second portion 494b is formed in a rod shape, and extends from the other end opposite to the one end connected to the electrode pad 90b in the first portion 494a by 14.5 mm in the X 'direction. And a second leg which has the same length as the longitudinal length of the first leg and is spaced apart by 3 mm in the ZZ ′ axial direction, and these two legs are continuous to the first portion 494 a It has a U-shaped configuration including a rod-like connecting part connected in the ZZ ′ axial direction at the end opposite to the side where

Further, as shown in FIG. 15B, the simulation model of the antenna 1494 according to the fifth modification includes a first portion 494a and a second portion 494b having the same shape as the antenna 494 according to the fourth modification, and a dielectric member 180. And a rod-like third portion 494c which protrudes by 3 mm on the copper plate 190 side (Y ′ direction) in a form orthogonal to the surface (XZ plane) on the copper plate 190 side.

Furthermore, as shown in FIG. 15C, the simulation model of the antenna 594 according to the sixth modification is configured of a first portion 94a and a second portion 594b which have the same shape as the antenna 94 according to the first embodiment. . Here, the second portion 594b is formed in a rod-like shape and extends by 12.5 mm in the X direction from the other end opposite to the one end connected to the electrode pad 90b in the first portion 94a. And a second leg formed in a rod shape and having a length of 10.5 mm in the XX ′ axial direction and spaced apart from the first leg by 3 mm in the ZZ ′ axial direction; The leg portion is formed in a U-shape including a rod-like connecting portion connected at the end opposite to the side continuing to the first portion 494a in the ZZ ′ axial direction.

16 is a simulation

model showing antennas

494, 1494, and 594 according to Modifications 4 to 6 shown in FIGS. 15 (a) to 15 (c) and an antenna 94 according to Embodiment 1 shown in FIG. 6 (c). The result of calculating the average value of the directivity gain is shown. As shown in FIG. 16, in the model shown in FIG. 6 (c), although the average value of the directivity gain is -5.3 dB, the fourth to fourth modifications shown in FIGS. 15 (a) to (c) are shown. In the model according to 6, the average value of the directivity gain is improved to -3.8 dB, -3.9 dB, and -3.58 dB.

That is, with the

antennas

494, 1494, and 594 according to the fourth to sixth modifications, the reception sensitivity can be further improved than the antenna 94 according to the first embodiment.

(4) In the first embodiment, an example in which the module substrate 11 is formed in an annular shape in plan view has been described, but the present invention is not limited to this. For example, it may be formed in a polygonal annular shape such as a triangle, a quadrangle, or a pentagon in a plan view. The plurality of light emitting units 13 may also be mounted in, for example, an oval or polygonal ring shape. Further, the posture of the light emitting unit 13 does not have to be the direction in which all the light emitting units 13 have the main emission direction along the lamp axis J, and a part may be a direction intersecting the lamp axis J .

(5) In the first embodiment, an example in which the front surface 20b and the rear surface 20c of the base 20 have a substantially annular shape is described. However, the present invention is not limited to this, and any shape may be used. The entire front surface 20b of the base 20 does not necessarily have to be a flat surface as long as the semiconductor light emitting device can be disposed in a flat surface. Further, the rear surface 20c of the base 20 is not limited to a flat surface. In addition, the light emitting module 10 may be fixed to the base 20 by adhesion or engagement.

(6) In the first embodiment, an example in which the shape of the globe 30 is a shape that simulates a bulb of a A-type light bulb has been described. However, the present invention is not limited thereto, and any other shape may be used. Further, the glove 30 is not limited to the press-in, and may be fixed to the housing 50 by an adhesive or the like.

(7) In the first embodiment, an example in which the case 50 is fixed to the base 20 by caulking has been described, but an adhesive is poured into a space surrounded by the case 50, the base 20, and the globe 30, etc. The housing 50 may be fixed to the base 20. Further, the material of the housing 50 is not limited to metal, and may be, for example, a resin having high thermal conductivity.

(8) In the first embodiment, the example has been described in which the power supply circuit U1 of the circuit unit 90 includes the step-down chopper DC-DC converter, but the present invention is not limited to this. For example, a DC-DC converter such as a single forward system, a flyback system, a push-pull system, a half bridge system, a full bridge system, a mag amp system, a boost chopper system, and a buck-boost chopper system may be included.

(9) As a switching element included in the power supply circuit U 2, in addition to the FET described in the embodiment, an electrostatic induction transistor (Static Induction Transistor, SIT), a gate injection transistor (Gate Injection Transistor) , GIT), Insulated Gate Bipolar Transistor (IGBT), Si based bipolar transistor, and the like. When the switching element is an IGBT, the “source” and the “drain” in the above description may be read as an “emitter” and a “collector”, respectively. When the switching element is a bipolar transistor, the "source", "drain" and "gate" in the above description may be read as "emitter", "collector" and "base", respectively.

(10) In the first embodiment, specific product names are listed as the LED driver IC and the signal processing IC, but the present invention is not limited to this. Other LED driver ICs and signal processing ICs can also be used.

(11) In the first embodiment, when the power is turned on, the light emitting unit 13 is activated in the lighted state, that is, the signal processing circuit U3 is activated via the power supply circuit U2. It is not limited to For example, when the power is turned on, the light emitting unit 13 may be activated from the light-off state, that is, the signal processing circuit U3 may be activated independently without intervention of the power supply circuit U2.

(12) In the first embodiment, an example in which the second reflective member 80 is formed of an epoxy resin has been described. However, the present invention is not limited to this. For example, a specific dielectric such as polyethylene terephthalate or polycarbonate resin It may be formed of a resin material having a rate of about 3.0. Alternatively, the second reflection member 80 may be formed of a resin material such as aniline resin, acrylonitrile resin, silicone resin or the like having a relative dielectric constant of about 3.5 to 5.0.

Furthermore, the second reflecting member 80 may be made of an inorganic material such as quartz glass, a glass-silicon laminated plate, quartz, or the like having a dielectric constant of 3.5 to 5.0.

(13) In the first embodiment, an example in which a wireless signal in the frequency band of 2.4 GHz compliant with the IEEE 802.15.4 standard is used as the wireless signal has been described. However, the present invention is not limited thereto. And radio signals of other frequencies may be used. For example, the frequency of the frequency band separately secured as the use band may be used for each area. Specifically, in Europe, 433.05 to 434.79 [MHz], 863 to 870 [MHz], in Japan, 426 to 429 [MHz], 950 to 956 [MHz], in the United States, 260 to 470 [MHz], It is possible to use frequencies in the use band such as 902 to 928 [MHz].

(14) In the second embodiment, an example of the lighting fixture to which the lamp 1 is attached with the base 60 side facing upward (ceiling side) has been described. Conversely, the globe 30 side is facing upward (ceiling side) It can also be attached.

Moreover, in Embodiment 2, although the example provided with the lamp | ramp 1 which concerns on Embodiment 1 was demonstrated, you may provide the lamp | ramp which concerns on the above-mentioned each modification.

(15) Further, in the first embodiment, although the example in which the second reflecting member 80 is provided has been described, the present invention is not limited to this, and a light scattering member may be provided.

A cross-sectional view of a lamp 3 according to this modification is shown in FIG.

As shown in FIG. 17, the lamp 3 has substantially the same configuration as that of the first embodiment, and extends from the light scattering member 3080 and the circuit board 90 a of the circuit unit 90 and is embedded in the light scattering member 3080. And the second embodiment is different from the first embodiment. The same components as those of the first embodiment are denoted by the same reference numerals, and the description will not be repeated.

The light scattering member 3080 has an external shape like two inverted truncated cones stacked one on another. It consists of a lower part 3081 which constitutes part of the lower frustum and an upper part 3082 which constitutes part of the upper frustum. The light scattering member 3080 is attached to the module substrate 11 of the light emitting module 10. A recess 3087 is provided substantially at the center of the light scattering member 3080. The concave portion 3087 has a substantially conical shape (inverted conical shape) having a top on the base 20 side, and its conical surface is a reflecting surface 3088. The antenna 3194 is embedded in the lower portion 3081 of the light scattering member 3080.

The light scattering member 3080 is made of a translucent material in which translucent light scattering particles having an average particle diameter of 10 μm or less are dispersed and mixed. Specifically, it is composed of a plurality of particle portions made of translucent light scattering particles, and a base portion which contains the particle portions and is made of a translucent material. In the present application, “average particle size” means the particle size at 50% of the integrated value in the particle size distribution determined by the laser diffraction / scattering method.

Here, as a material of the translucent light-scattering particles constituting the particle portion, acrylic resin, styrene resin, styrene acrylic resin, melamine-formalin resin, polyurethane resin, polyester resin, silicone resin, Fluororesins and copolymers of these resins may, for example, be mentioned. Furthermore, inorganic oxides such as silica, titania, alumina, silica alumina, zirconia, zinc oxide, barium oxide, strontium oxide, zirconium oxide and the like can be mentioned. One type of translucent light scattering particle made of these materials may be used, or a plurality of types may be mixed and used. On the other hand, resin and an inorganic material are mentioned as a translucent material which comprises a base part. Examples of the resin include thermoplastic resins such as general purpose plastics, engineer plastics and super engineer plastics, and thermosetting resins. Specifically, polycarbonate resin, acrylic resin, fluorine-based acrylic resin, silicone acrylic resin, epoxy acrylate resin, polystyrene resin, acrylonitrile styrene resin, cycloolefin polymer, methyl styrene resin, fluorene resin, PET (polyethylene terephthalate), Examples thereof include polypropylene, phenol resin, melamine resin, PBT (polybutylene terephthalate), POM (polyoxymethyl), PA (polyamide), PPS (polyphenyl sulfide) and the like. In addition, examples of the inorganic material include glass and ceramic.

In addition, as shown in FIG. 18, a reflective film 3100 may be provided on the reflective surface 3088 of the light scattering member 3080.

Alternatively, as shown in FIG. 19, the shape of the reflecting surface 3111 in the vertical cross section of the light scattering member 3110 may be arc-shaped. For example, the reflecting surface 3111 has a concave surface shape recessed on the lamp axis J side, and the shape of the second reflecting surface in the longitudinal cross section is a substantially arc shape bulging on the lamp axis J side.

Furthermore, as shown in FIG. 20, the shape of the reflective surface 3121 in the vertical cross section of the light scattering member 3120 may be composed of two regions with different inclinations. Here, the reflecting surface 3121 is composed of the lower region 3122 and the upper region 3123, and the inclination of the upper region 3123 to the lamp axis J is more inclined than the inclination of the lower region 3122 to the lamp axis J in the longitudinal cross section. It has a large angle configuration.

Further, as shown in FIG. 21, the recess 3131 of the light scattering member 3130 may have a substantially inverted truncated cone shape. Alternatively, as shown in FIGS. 22A and 22B, the recess 3141 of the light scattering member 3140 may have a substantially V-shaped cross section and a substantially annular groove shape.

The

light scattering members

3080, 3110, 3120, 3130 and 3140 described above with reference to FIGS. 18 to 22 are all embedded in the lower part.

(15) Further, as shown in FIG. 23A, the recess 3151 of the light scattering member 3150 is substantially cylindrical, and the recess 3151 is formed only in the upper portion 3154 and reaches the lower portion 3155. It may not be done. And as shown in FIG.23 (b), the shape in the boundary part of the upper part 3154 and the lower part 3155 may be bent in the substantially S shape at the antenna 4094. As shown to FIG.

(16) Also, as shown in FIG. 24, the light scattering member 3170 is a through hole in which the recess 3161 penetrates the light scattering member 3160 up and down along the lamp axis J, and is reflected on the inner circumferential surface 3162 of the recess 3161. The film 3163 may be formed, and the coiled antenna 5094 may be disposed in the through hole.

(17) Also, as shown in FIGS. 25 (a) and 25 (b), the light scattering member 3170 has an external shape formed of one inverted truncated cone having a recess 3173, and the light scattering member 3170 A loop antenna 6094 having a loop-like portion surrounding the recess 3173 may be embedded.

(18) Also, as shown in FIG. 26, like the light scattering member 3180, it has the appearance of one inverted truncated cone, and the recess 3182 vertically penetrates the light scattering member 3180 along the lamp axis J. It may be a cylindrical through hole, and a coiled antenna 7094 may be disposed inside the recess 3182.

The present invention can be widely used in lighting in general.

Reference Signs List 1 lamp 10 light emitting module 11 module substrate 13 light emitting unit 20 base 30 globe 30 circuit case 50 case 60 base 70 first reflecting member 80 second reflecting member 90 circuit unit 90 a circuit board 90 b electrode pad 93 circuit element 94 antenna 94a first part 94b second part 95 diode bridge 96 signal processing IC
97 LED Driver IC
98 Power Supply IC
U1 Rectification smoothing circuit U2 power supply circuit U3 signal processing circuit U4 power control circuit

Claims

A light emitting module having a module substrate and a plurality of light emitting units mounted on the module substrate and having a main emission direction of light orthogonal to the module substrate;
A wireless signal received by an antenna which has an antenna formed of a conductive material and disposed on one side of the module substrate on which the light emitting unit is mounted so as not to overlap the light emitting unit in the main emission direction of the light A circuit unit having a circuit for controlling power supply to the light emitting unit based on
A housing disposed on the other surface side opposite to the one surface side of the module substrate and housing the circuit unit therein;
And a dielectric member formed of a dielectric material and in contact with at least a part of the antenna.
The module substrate is annularly formed in plan view.
The lamp according to claim 1, wherein the antenna and the dielectric member are disposed inside the opening of the module substrate in a plan view.
The lamp according to claim 2, wherein the dielectric member has a plate-like portion which is disposed apart from the module substrate and in parallel to the surface of the module substrate.
The circuit unit comprises a circuit board having electrode pads,
The antenna is in the shape of a rod bent in an L shape, and has a first portion with one end connected to the electrode pad and a rod with one end connected to the other end of the first portion. The lamp according to claim 3, comprising: a second portion disposed along the surface on the module substrate side of the plate-like portion.
The second portion includes two rod-like portions arranged in parallel to one another, and a connecting portion extending at a direction perpendicular to the longitudinal direction of the rod-like portion at an end of the rod-like portion and connecting the rod-like portions to each other The lamp according to claim 4, characterized in that:
The length in the longitudinal direction of the other rod-shaped portion is longer than the length in the longitudinal direction of one of the rod-shaped portions connected to the other end of the first portion. lamp.
The antenna is further formed in a rod shape, and one end is connected to the other end of the second portion connected to the first portion, and is orthogonal to the surface of the plate-like portion on the module substrate side The lamp according to claim 6, further comprising a third portion protruding toward the module substrate in a shape.
The antenna is further formed in a rod shape, and one end portion is connected to the other end portion of the third portion whose one end portion is connected to the second portion, and at the module substrate side in the plate-like portion The lamp according to claim 7, further comprising a fourth portion arranged in a form parallel to a plane.
The lamp according to claim 7, wherein the antenna is disposed inside the dielectric member.
The lamp according to claim 4, wherein the first portion is further bent in a plane parallel to a surface of the circuit board on which the electrode pad is formed.
The lamp according to claim 1, wherein the dielectric member is formed by embedding at least a part of the antenna.
The circuit unit is
A power supply circuit for supplying power to the light emitting unit;
A signal processing circuit that outputs a control signal corresponding to a wireless signal received by the antenna;
The lamp according to claim 1, further comprising: a power control circuit configured to control the power supply circuit based on a control signal input from the signal processing unit.
A lighting fixture comprising the lamp according to claim 1.