JP2012009360A - Auxiliary light source device, and electrodeless discharge lamp, electrodeless discharge lamp lighting device, and illumination device including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auxiliary light source device capable of increasing light bundle in the lighting of an electrodeless discharge lamp, and provide an electrodeless discharge lamp, an electrodeless discharge lamp lighting device, and an illumination device that include the auxiliary light source device.SOLUTION: An auxiliary light source device 5 comprises a receiving coil 51 fed, by electromagnetic induction, from an induction coil 10 placed close to a bulb 20 of an electrodeless discharge lamp 2; an light-emitting diode 50 serving as auxiliary light source that lights due to electric power source induced by the receiving coil 51 at least during lighting of the electrodeless discharge lamp 2. The light from the light-emitting diode 50 allows an increase of light bundle.

Description

  The present invention relates to an auxiliary light source device, an electrodeless discharge lamp including the auxiliary light source device, an electrodeless discharge lamp lighting device, and a lighting fixture.

  2. Description of the Related Art Conventionally, an electrodeless discharge lamp lighting device for lighting an electrodeless discharge lamp including a bulb made of a light-transmitting material and filled with a discharge gas has been provided. This type of electrodeless discharge lamp lighting device supplies high frequency power to an induction coil arranged close to the electrodeless discharge lamp, and generates plasma due to the high frequency electromagnetic field in the electrodeless discharge lamp. Light up.

  Furthermore, in order to improve startability in a dark place, an electrodeless discharge lamp lighting device including a start auxiliary light source that is turned on at the start in the dark place and irradiates light to the bulb of the electrodeless discharge lamp is also provided. (For example, refer to Patent Document 1).

JP 2009-158184 A

  The start auxiliary light source is intended to improve startability in a dark place, so it is arranged at a position covered by the electrodeless discharge lamp bulb so that a large amount of light is incident on the bulb of the electrodeless discharge lamp. In addition, it was turned off after the electrodeless discharge lamp was turned on. That is, the start auxiliary light source does not increase the luminous flux while the electrodeless discharge lamp is turned on.

  The present invention has been made in view of the above-described reasons, and an object of the present invention is to provide an auxiliary light source device capable of increasing a luminous flux during lighting of an electrodeless discharge lamp, an electrodeless discharge lamp including the same, and an electrodeless discharge lamp. An object is to provide an electric lamp lighting device and a lighting fixture.

  An auxiliary light source device according to the present invention includes a power receiving coil arranged in proximity to a bulb of an electrodeless discharge lamp, and an auxiliary light source that is turned on by power induced in the power receiving coil at least when the electrodeless discharge lamp is turned on. It is characterized by providing.

  The electrodeless discharge lamp of the present invention is connected to the auxiliary light source device, a bulb made of a light-transmitting material, in which a discharge gas is enclosed, and the power receiving coil is disposed in proximity to the bulb. And a holding body for holding the auxiliary light source.

  The bulb may be a closed loop shape, and the auxiliary light source may be surrounded by the bulb.

  Furthermore, the electrodeless discharge lamp lighting device according to the present invention includes the auxiliary light source device, an induction coil disposed close to a bulb of the electrodeless discharge lamp, and high frequency power supplied to the induction coil, thereby And a high-frequency power supply unit that turns on the discharge lamp.

  Further, the lighting fixture of the present invention includes the auxiliary light source device, a bulb made of a light-transmitting material, in which a discharge gas is enclosed, and the power receiving coil is arranged in proximity, and an induction arranged in proximity to the bulb. It is characterized by comprising a coil and a high frequency power supply section for generating a discharge in the bulb by supplying high frequency power to the induction coil.

  According to the present invention, the luminous flux can be increased by the light of the auxiliary light source during the lighting of the electrodeless discharge lamp.

It is a circuit block diagram which shows Embodiment 1 of this invention. It is a perspective view which shows a structure same as the above. It is the partially broken front view which shows a structure same as the above. It is a circuit diagram which shows the example of a change same as the above. It is a front view which shows another example of a change same as the above. It is a top view which shows Embodiment 2 of this invention. It is explanatory drawing which shows the structure of a core same as the above. It is explanatory drawing which shows the relationship between the inductance of an induction coil, and temperature. It is explanatory drawing which shows the principal part of the example of a change same as the above.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, the electrodeless discharge lamp lighting device 1 in which the auxiliary light source device 5 of the present embodiment is integrated includes an induction coil 10 disposed close to the bulb 20 of the electrodeless discharge lamp 2 and a DC power source E. A high frequency power supply unit 11 that turns on the electrodeless discharge lamp 2 by converting the DC power input from the above into high frequency AC power and inputting it to the induction coil 10.

  The direct current power source E is composed of, for example, a known AC-DC converter that converts alternating current power into direct current power having a predetermined voltage.

  The high frequency power supply unit 11 includes a series circuit of two switching elements Q1 and Q2 connected between output terminals of the DC power supply E, an inductor L1 having one end connected to a connection point of the switching elements Q1 and Q2, and The first capacitor C1 having one end connected to the other end of the inductor L1 and the other end connected to the output terminal on the low voltage side of the DC power supply E, and a drive circuit for alternately turning on / off the switching elements Q1 and Q2 A so-called half-bridge inverter provided with DR. One end of the induction coil 10 is connected to the connection point between the inductor L1 and the first capacitor C1 via the second capacitor C2, and the other end is connected to the output terminal on the low voltage side of the DC power source E. Since the drive circuit DR as described above can be realized by a well-known electronic circuit, detailed illustration and description thereof are omitted.

  The structure of the electrodeless discharge lamp lighting device 1 includes a coupler 3 that holds an induction coil 10 and a case 4 that houses and holds a high-frequency power supply unit 11 as shown in FIG. The induction coil 10 and the high frequency power supply unit 11 are electrically connected to each other via the electric wire PC.

  As shown in FIG. 3, the coupler 3 includes a base 31 having a disk-shaped pedestal portion 31a and a cylindrical cylinder portion 31b projecting from the center of one surface of the pedestal portion 31a, and a magnetic body (for example, Mn And a cylindrical core 32 in which the cylinder portion 31b of the base 31 is fitted inside. The induction coil 10 is wound around the core 32. Hereinafter, the vertical direction will be described with reference to FIG. That is, the axial direction of the cylinder portion 31b and the core 32 in the thickness direction of the pedestal portion 31a is referred to as the vertical direction, and the direction in which the cylinder portion 31b protrudes from the pedestal portion 31a is referred to as the upward direction. Note that the vertical direction here is defined for convenience of explanation only, and does not necessarily match the vertical direction in the actual use state.

  The electrodeless discharge lamp 2 includes a bulb 20 made of a light-transmitting material and filled with a discharge gas. The discharge gas is obtained by mixing a metal vapor (eg, mercury, sodium, cadmium, zinc, etc.) at a predetermined ratio in a rare gas (eg, neon, argon, krypton, xenon, etc.). A fluorescent material (not shown) is applied to the inner surface of the bulb 20. When an arc discharge is generated in the bulb 20 due to the electromagnetic field generated by the induction coil 10, the ultraviolet light generated thereby is converted into visible light by the phosphor, thereby causing the bulb 20 to emit light (that is, electrodeless emission). The electric light 2 is turned on). Further, the valve 20 has a connection recess 20a into which the core 32 and the cylinder portion 31b of the coupler 3 are inserted, and the induction coil 10 is inserted into the connection recess 20a by inserting the core 32 and the cylinder portion 31b of the coupler 3. It is disposed close to the bulb 20 of the electrodeless discharge lamp 2. Further, a convex portion 20b that is inserted into the cylinder portion 31b of the coupler 3 protrudes from the bottom surface of the connection concave portion 20a.

  Furthermore, the electrodeless discharge lamp 2 has a cylindrical base 21 mechanically coupled to the bulb 20 so as to surround the opening of the connection recess 20a.

  Hereafter, the characteristic part of this embodiment is demonstrated. On the upper surface of the base portion 31a of the base 31 of the coupler 3, a plurality of light emitting diodes 50 as auxiliary light sources are arranged side by side in a circular shape. The distance between each light emitting diode 50 and the central axis of the cylinder portion 31 b is sufficiently large with respect to the diameter of the base 21. Thereby, even when the electrodeless discharge lamp 2 is attached to the coupler 3, all the light emitting diodes 50 are exposed as viewed from above. Electrically, all the light emitting diodes 50 constitute one series circuit.

  Further, a power receiving coil 51 is wound around the core 32, and a rectifying / smoothing circuit 52 that rectifies and smoothes the power induced in the power receiving coil 51 and inputs it to the series circuit of the light emitting diodes 50 is provided on the upper surface of the pedestal portion 31a. It is fixed to the position covered with the base 21. The rectifying / smoothing circuit 52 includes a diode bridge that performs full-wave rectification on the input power from the power receiving coil 51, and a capacitor that smoothes the DC output (pulsating current output) of the diode bridge and inputs it to the series circuit of the light emitting diodes 50. That is, the auxiliary light source device 5 is configured by the light emitting diode 50, the power receiving coil 51, and the rectifying and smoothing circuit 52. The electrical connection between the light emitting diode 50 and the rectifying / smoothing circuit 52 and the electrical connection between the light emitting diodes 50 may be achieved by providing a conductive pattern (not shown) on the upper surface of the base portion 31a of the coupler 3, for example. Alternatively, this may be achieved by insert molding a conductor (not shown) in the base 31 of the coupler 3.

  Here, the number of windings of the power receiving coil 51 and the number of the light emitting diodes 50 are such that each of the light emitting diodes 50 is at least during a period in which power sufficient to stably light the electrodeless discharge lamp 2 is output from the high frequency power supply unit 11. Is determined to light up. Thereby, at least during the lighting of the electrodeless discharge lamp 2, each light emitting diode 50 is turned on.

  According to the above configuration, the light flux can be increased by the light of the light emitting diode 50 as the auxiliary light source.

  In addition, since the arrangement of the light emitting diodes 50 in this embodiment is also an arrangement in which light is incident on the bulb 20, if each of the light emitting diodes 50 is turned on before the electrodeless discharge lamp 2 is turned on, it is conventional. A start assist effect such as the start start light source of the example is also obtained.

  As shown in FIG. 4, two series circuits of the light emitting diodes 50 may be connected in antiparallel between both ends of the power receiving coil 51, and the rectifying and smoothing circuit 52 may be omitted. That is, the light emitting diodes 50 of the two series circuits are turned on alternately.

  Further, the auxiliary light source device 5 may be integrated with the electrodeless discharge lamp 2 as shown in FIG. 5 instead of being integrated with the electrodeless discharge lamp lighting device 1. In the example of FIG. 5, each light emitting diode 50 is held on the upper surface of the base 21 as a holding body, and the power receiving coil 51 is held inside the base 21 so as to surround the cylinder portion 31 b of the coupler 3. In this case, in order to ensure the heat dissipation of the light emitting diode 50, it is desirable to use a material having a relatively high thermal conductivity such as an aluminum alloy as the material of the base 21. In the example of FIG. 5, the coupler 3 that does not protrude from the electrodeless discharge lamp 2 when viewed from above is used.

  Here, as the auxiliary light source, for example, a small incandescent lamp called a bean bulb can be used in addition to the light emitting diode 50, but the light emitting diode 50 is used as the auxiliary light source from the viewpoint of light emission efficiency and life. desirable.

(Embodiment 2)
The present embodiment is different from the first embodiment only in the structure, and the basic circuit configuration is the same as that of the first embodiment. Therefore, illustration and description of common parts are omitted.

  In the present embodiment, as shown in FIG. 6, the cap 21 of the electrodeless discharge lamp 2 is omitted to make the bulb 20 a closed loop shape, and each of the bulbs 20 is enclosed in a poloidal direction (small circumferential direction). The core 32 is attached to the valve 20. In the example of FIG. 6, the valve 20 is shaped such that the ends of two straight pipes parallel to each other are connected to each other via a U-shaped pipe, and the core 32 is in the longitudinal direction of the valve 20. A total of two are attached to each end (that is, each U-shaped pipe).

  Further, as shown in FIG. 7, each core 32 is configured by combining two halves 32a and 32b each having a semi-annular shape. The induction coil 10 is wound around one half 32a of each core 32, and the receiving coil 51 is wound around the other half 32b. That is, in this embodiment, two power receiving coils 51 are also provided. The induction coils 10 wound around different cores 32 are connected in parallel to each other between output terminals of the high-frequency power supply unit 11, for example. Each induction coil 10 and each receiving coil 51 are wound in the poloidal direction of the core 32. Each core 32 is attached to the valve 20, so that each induction coil 10 and each power receiving coil 51 are arranged close to the valve 20.

  Further, a series circuit of five light emitting diodes 50 as auxiliary light sources is connected to each power receiving coil 51 via a rectifying and smoothing circuit 52.

  Each light emitting diode 50 and the rectifying / smoothing circuit 52 are each mounted on a printed wiring board 53 as a single holding body, and the printed wiring board 53 is fixed like an appropriate metal fitting while being surrounded by the bulb 20. It is fixed to the valve 20 by means (not shown). As a result, each light emitting diode 50 is surrounded by the bulb 2, and as a whole, luminance unevenness that makes the range surrounded by the bulb 20 appear dark can be suppressed.

  As described in the first embodiment, the two series circuits of the light emitting diodes 50 may be connected in antiparallel with each other between both ends of the power receiving coil 51, and the rectifying and smoothing circuit 52 may be omitted.

  Here, in general, the ferromagnetic material used as the material of the core 32 has higher temperature dependency of the magnetic permeability than the non-magnetic material. Therefore, when a nonmagnetic material is interposed between the halves 32a and 32b, the temperature dependency of the inductance of the core 32 is higher than when no nonmagnetic material is interposed between the halves 32a and 32b. Become. For example, when a non-magnetic material is not interposed between the halves 32a and 32b, the inductance of the induction coil 10 decreases as shown by the broken line A in FIG. When a non-magnetic material is interposed between the bodies 32a and 32b, as shown by a solid line B in FIG. From the above results, in the present embodiment, a non-magnetic material (not shown) is interposed between the halves 32a and 32b so that the operation characteristics are stabilized in a place where the temperature change is relatively large such as outdoors. It is disguised. As this non-magnetic material, for example, synthetic resin or paper can be used. Or you may use the holding means (not shown) which each hold | maintains each half-split body 32a, 32b in the form where a fixed clearance gap is ensured in the half-split bodies 32a, 32b. In this case, air is used as the nonmagnetic material.

  Further, instead of winding the power receiving coil 51 around the half body 32b, it is wound around a separate core (hereinafter referred to as "power receiving core") 54 that is magnetically coupled to the core 32 as shown in FIG. You may turn. The example of FIG. 9 will be described in detail. The power receiving core 54 is made of a magnetic material similar to each of the halves 32a and 32b of the core 32. The power receiving core 54 is U-shaped and is in contact with the ends of the halves 32a and 32b whose ends are different from each other, and between the ends of the halves 32a and 32b where the power receiving core 54 contacts. There is a gap. That is, the magnetic flux leaking from the gap passes through the power receiving core 54, and the core 32 and the power receiving core 54 constitute a closed magnetic circuit that surrounds the valve 20 in the poloidal direction as a whole. Each of the halves 32 a and 32 b and the power receiving core 54 are bound by a metal belt 6.

DESCRIPTION OF SYMBOLS 1 Electrodeless discharge lamp lighting device 2 Electrodeless discharge lamp 5 Auxiliary light source device 10 Induction coil 11 High frequency power supply part 21 Base (holding body)
50 Light emitting diode (auxiliary light source)
51 Power receiving coil 53 Printed wiring board (holding body)

Claims (5)

A power receiving coil arranged close to the bulb of the electrodeless discharge lamp;
An auxiliary light source device comprising: an auxiliary light source that is turned on by the power induced in the power receiving coil at least when the electrodeless discharge lamp is turned on. An auxiliary light source device according to claim 1;
A bulb made of a material having translucency, in which a discharge gas is enclosed and the power receiving coil is disposed in proximity,
An electrodeless discharge lamp comprising: a holding body connected to the bulb and holding the auxiliary light source. An auxiliary light source device according to claim 1;
A discharge gas is sealed and made of a light-transmitting material and the receiving coil is disposed close to the bulb.
The valve has a closed loop shape,
The electrodeless discharge lamp, wherein the auxiliary light source is surrounded by the bulb. An auxiliary light source device according to claim 1;
An induction coil disposed close to the bulb of the electrodeless discharge lamp;
An electrodeless discharge lamp lighting device comprising: a high frequency power supply unit that lights the electrodeless discharge lamp by supplying high frequency power to the induction coil. An auxiliary light source device according to claim 1;
A bulb made of a material having translucency, in which a discharge gas is enclosed and the power receiving coil is disposed in proximity,
An induction coil disposed proximate to the valve;
A luminaire comprising: a high frequency power supply unit that generates a discharge in the bulb by supplying high frequency power to the induction coil.

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