JP4710060B2 - LIGHTING DEVICE AND LIGHTING APPARATUS WITH THE LIGHTING DEVICE - Google Patents

Description

  The present invention relates to a lighting device and a lighting fixture with the lighting device. More specifically, the present invention relates to an illumination device that uses a cold cathode fluorescent lamp as an arc tube, and an illumination fixture with the illumination device.

  As a fluorescent lamp provided in the lighting fixture, there are a hot cathode fluorescent lamp and a cold cathode fluorescent lamp.

  A general configuration of a luminaire including a hot cathode fluorescent lamp is interpreted as shown in FIG. A lighting fixture 30 shown in FIG. 5 includes a hot cathode fluorescent lamp 31, a starting circuit 32, and a power supply circuit 33. The electrodes of the hot cathode fluorescent lamp 31, the power supply circuit 33 and the starter circuit 32 are connected to each other. The starter circuit 32 includes a starter 34, and the power supply circuit 33 includes an AC power supply 36 and a ballast 35. ing. In the lighting apparatus 30, the starter 34 is closed, so that power from the AC power supply 36 is supplied to the hot cathode fluorescent lamp 31 by the stabilizer 35, and as a result, a low frequency voltage is applied between the electrodes of the hot cathode fluorescent lamp 31. Is applied, and the hot cathode fluorescent lamp 31 is turned on.

  In general cold cathode fluorescent lamps, electrodes are provided inside a tube, and a general configuration of a lighting fixture having such an internal electrode type cold cathode fluorescent lamp is interpreted as shown in FIG. Is done. A lighting fixture 40 shown in FIG. 6 includes a plurality of cold cathode fluorescent lamps 41 and an inverter 42 provided for each cold cathode fluorescent lamp 41. In this luminaire 40, each inverter 42 converts the voltage from the AC power supply 43 into DC, then converts it into a high-frequency AC, and supplies it to the corresponding cold cathode fluorescent lamps 41, whereby each cold cathode fluorescent lamp 41 is supplied. The lamp 41 is lit.

  As a lighting fixture including such a cold cathode fluorescent lamp, Patent Literature 1 discloses a lighting fixture including a plurality of cold cathode fluorescent lamps and an inverter provided for each cold cathode fluorescent lamp as described above. It is disclosed.

  Patent Document 2 discloses a lighting fixture including a plurality of cold cathode fluorescent lamps and an inverter that applies an AC voltage of high frequency and high voltage to all of these cold cathode fluorescent lamps. In this lighting apparatus, the secondary winding of the step-up transformer is divided into two in the inverter, the middle point thereof is connected to the ground potential, and both ends are connected to the electrodes of the cold-in fluorescent lamps. As a result, voltages having a phase difference of 180 degrees are applied to the electrodes at both ends of the lamp, so that the potential applied to the electrodes of the lamp can be reduced.

  Patent Document 3 discloses a lighting fixture including a plurality of cold cathode fluorescent lamps, a ballast, and an inverter. In this lighting fixture, the inverter converts the alternating current power into direct current and then supplies it to the ballast, and the ballast that receives the direct current power supply controls lighting of each cold cathode fluorescent lamp.

  As a special cold cathode fluorescent lamp, there is an external electrode type cold cathode fluorescent lamp (hereinafter referred to as an external electrode fluorescent lamp) in which an electrode is provided outside a lamp vessel and the lamp vessel is a dielectric. A general configuration of a lighting fixture including such an external electrode fluorescent lamp is interpreted as shown in FIG. The luminaire 50 shown in FIG. 7 includes a plurality of external electrode fluorescent lamps 51 and an inverter 52. In this luminaire 50, the inverter 52 converts the electric power from the AC power source 53 into a direct current, then converts it into a high-frequency alternating current and supplies it to all the external electrode fluorescent lamps 51. Light.

As a lighting fixture including this external electrode fluorescent lamp, Patent Literatures 4 and 5 disclose a lighting fixture including a plurality of external electrode fluorescent lamps and an inverter as described above, and among them, Patent Literature 5 discloses. In the lighting fixture, a group of external electrode fluorescent lamps connected to the same inverter is configured, and the external electrode fluorescent lamps can be turned on / off independently for each group.
JP 2002-132193 A JP 2004-273396 A JP 2004-131264 A Japanese Patent Application Laid-Open No. 2007-066905 JP 2007-329093 A

  Here, the hot cathode fluorescent lamp is consumed by heating the electrodes when a low frequency voltage is applied between the electrodes. As a result, the hot cathode fluorescent lamp has a shorter lifetime than the cold cathode fluorescent lamp. For this reason, the lighting fixture provided with the hot cathode fluorescent lamp requires time and effort to frequently replace the lamp.

  On the other hand, the cold cathode fluorescent lamp has a larger cathode fall voltage that causes thermal loss without contributing to light emission than the hot cathode fluorescent lamp. For this reason, the luminaire provided with the cold cathode fluorescent lamp has lower luminous efficiency than the luminaire provided with the hot cathode fluorescent lamp.

  Since the hot cathode fluorescent lamp and the cold cathode fluorescent lamp have the above-described features, in recent years, as in a cab shown in Patent Document 3, a lighting fixture including a hot cathode fluorescent lamp and a cold cathode fluorescent lamp are provided. The container which can arrange | position any of the provided lighting fixtures is provided in the attachment position of a lighting fixture. In this case, it is possible to change the illumination lamp from one of the cold cathode fluorescent lamp and the hot cathode fluorescent lamp to the other by exchanging the luminaire arranged in the container. However, exchanging the luminaire itself in this way requires a great deal of labor.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an illumination device that can easily replace an illumination lamp of a lighting fixture from a cold cathode fluorescent lamp to a hot cathode fluorescent lamp, and with the illumination device. It is to provide a lighting fixture.

In order to achieve the above object, a lighting device according to the first aspect of the present invention provides:
A lighting device attached to a lighting fixture having a hot cathode fluorescent lamp as an arc tube,
A cold cathode fluorescent lamp;
In a state connected to said lamp connecting terminals of the lighting fixture, enter the power from the lighting circuit of the lighting fixture, the cold cathode fluorescent said AC electric power of the high frequency lamp to light the cold cathode fluorescent lamp to supply the inverter circuit When,
Equipped with a,
A plurality of the cold cathode fluorescent lamps are provided, the plurality of cold cathode fluorescent lamps are arranged on a circumference, and both ends are held by the support members,
The inverter circuit is incorporated in the support member .

Moreover, the lighting fixture with the illuminating device according to the second aspect of the present invention includes:
The lighting device;
A hot-cathode fluorescent lamp as a light-emitting tube, and a lighting fixture provided with a lighting circuit for inputting power to the inverter circuit,
The lighting circuit includes an AC power source and a ballast that supplies power from the AC power source to the hot cathode fluorescent lamp and the inverter circuit.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to replace | exchange the lamp | ramp for illumination of a lighting fixture from a cold cathode fluorescent lamp to a hot cathode fluorescent lamp easily.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated. FIG. 1 shows a configuration of a lighting device 1 according to Embodiment 1 of the present invention, and the lighting device 1 is attached to a lighting fixture 3 including a power supply circuit 2 and a starting circuit 4.

  The lighting circuit 2 of the lighting fixture 3 includes a commercial AC power source 5 and a ballast 6 that supplies power from the AC power source 5 to the lighting device 1. The ballast 6 is configured by a coil. When power is input from an AC power supply, the ballast 6 adjusts the phase difference between the voltage and current of the power and then supplies the power to the lighting device 1.

  The illumination device 1 includes a plurality of cold cathode fluorescent lamps 7 and an inverter circuit 8 in which a pair is formed for each cold cathode fluorescent lamp 7.

  Each of the cold cathode fluorescent lamps 7 is an internal electrode fluorescent lamp, and lights up when a high frequency voltage is applied between the electrodes formed at both ends. Each inverter circuit 8 is connected to the ground terminal 9, the corresponding cold cathode terminal of the cold cathode fluorescent lamp 7, and the lighting circuit 2 through the connection terminal, and the electric power supplied from the ballast 6 is converted to DC. After the conversion, it is converted into a high-frequency alternating current and supplied to the corresponding electrodes at both ends of the cold cathode fluorescent lamp 7.

  The starter circuit 4 of the lighting fixture 3 includes a starter 10. In the state shown in FIG. 1, the starter circuit 4 is disconnected from the lighting device 1 and the lighting circuit 2.

  FIG. 2 shows the shape of the lighting device 1. The illuminating device 1 is accommodated in an accommodating portion (not shown) formed in the luminaire 3, and the illuminating device 1 is replaced with a hot cathode fluorescent lamp 13 (see FIG. 3) described later. A socket for connecting the hot cathode fluorescent lamp 13 (see FIG. 3) to the lighting circuit 2 and the starting circuit 4 is provided in the housing portion. The illumination device 1 is provided with a support member 11, and the support member 11 holds both ends of the cold cathode fluorescent lamp 7 arranged on the circumference. Each inverter circuit 8 shown in FIG. 1 is incorporated in a support member 11 and connected to the corresponding cold cathode fluorescent lamp 7 via a connection terminal. At both ends of the support member 11, a base 12 for connecting the lighting device 1 to the lighting circuit 2 is provided so as to protrude. By attaching the base 12 to the socket of the lighting fixture 3, each inverter circuit 8 is connected to the ground terminal 9 and the lamp connection terminal of the lighting circuit 2 through the connection terminal.

  When the base 12 is attached to the socket and each inverter circuit 8 is connected to the ground terminal 9 and the lamp connection terminal, the ballast 6 supplies power from the AC power source 5 to the lighting device 1, and Each of the supplied inverter circuits 8 can apply a high frequency voltage between both electrodes of the corresponding cold cathode fluorescent lamp 7. As a result, each cold cathode fluorescent lamp 7 is lit.

  FIG. 3 shows the shape of the hot cathode fluorescent lamp 13 that is attached to the housing portion of the lighting fixture 3 in place of the lighting device 1. The hot cathode fluorescent lamp 13 is lit when a low frequency voltage is applied between the electrodes at both ends, and a base 15 attached to the socket of the lighting fixture 3 protrudes from both ends of the lamp vessel 14. Is provided.

  When the base 15 is attached to the socket of the luminaire 3, the luminaire 3 has the same configuration as that of the luminaire 30 shown in FIG. 5 (see the parentheses in FIG. 5 for the reference numerals), and a hot cathode fluorescent lamp. 13 electrodes, the lighting circuit 2 and the starting circuit 4 are connected to each other. In this state, the supply of power from the ballast 6 to the hot cathode fluorescent lamp 13 is controlled by the opening / closing operation of the starter 10, and when the starter 10 is closed, the power of the AC power supply 5 is supplied from the ballast 6 to all the hot cathode fluorescent lamps. Supplied to the lamp 13, a low frequency voltage is applied between the electrodes of each hot cathode fluorescent lamp 13. As a result, each hot cathode fluorescent lamp 13 is turned on.

  According to the present embodiment, the lighting device 1 is detached from the lighting fixture 3 and a hot cathode fluorescent lamp 13 is attached instead, so that the lighting lamp of the lighting fixture 3 is changed from the cold cathode fluorescent lamp 7 to the hot cathode fluorescent lamp 13. Can be replaced. For this reason, when replacing the lamp for illumination from the cold cathode fluorescent lamp to the hot cathode fluorescent lamp, it is not necessary to replace the luminaire 3 itself. This facilitates replacement of the illumination lamp.

  Next, Embodiment 2 of the present invention will be described with reference to FIG. As in the case of the luminaire 3 in the first embodiment, the luminaire 21 in the present embodiment contains the hot cathode fluorescent lamp 13 in the housing portion. In this state, the hot cathode fluorescent lamp 13 is connected to the lighting circuit 2 by the socket and the base 15. And the start circuit 4 can be connected. Moreover, the illuminating device 20 exhibits the same shape as the illuminating device 1 shown in FIG. 2, and is accommodated in the accommodating portion of the luminaire 21 in place of the hot cathode fluorescent lamp 13. Hereinafter, the description will focus on the differences from the first embodiment.

  The lighting device 20 includes a plurality of cold cathode fluorescent lamps 22 and a pair of inverter circuits 23.

  Each cold cathode fluorescent lamp 22 is an external electrode fluorescent lamp (hereinafter, referred to as an external electrode fluorescent lamp 22). Each electrode is provided outside the lamp container, and the lamp container is a dielectric. The external electrode fluorescent lamp 22 is lit when a high frequency voltage is applied between both electrodes, thereby generating a dielectric barrier discharge inside the lamp vessel.

  The pair of inverter circuits 23 is provided to apply a high frequency voltage to all of the external electrode fluorescent lamps 22.

  Next, the shape of the illuminating device 20 will be described again with reference to FIG. In the lighting device 20, both ends of the external electrode fluorescent lamp 22 arranged on the circumference are held by the support member 24. The inverter circuit 23 is incorporated in the support member 24 and connected to the electrodes of all the external electrode fluorescent lamps 22 via connection terminals, and a base 25 is formed at both ends of the support member. Further, the inverter circuit 23 is connected to the ground terminal 9 and the lamp connection terminal of the lighting circuit 2 through the connection terminals by attaching the base 25 to the socket of the lighting fixture 21.

  When the lighting device 20 is housed in the housing portion of the lighting fixture 21 and the base 25 is inserted into the socket of the lighting fixture 21, the ballast 6 supplies power from the AC power source 5 to the lighting device 20. The inverter circuit 23 receiving this power supply can apply a high-frequency voltage between both electrodes of all the external electrode fluorescent lamps 22. As a result, each external electrode fluorescent lamp 22 is turned on.

  Also in this embodiment, the lighting device 20 is removed from the lighting fixture 21, and the hot cathode fluorescent lamp 13 is attached instead, so that the lamp for illumination is replaced with the cold cathode fluorescent lamp (that is, the external electrode lamp 22). It can be replaced with a hot cathode fluorescent lamp.

About the illuminating device according to the first aspect of the present invention, preferably, it further comprises a base attached to a socket for connecting the hot cathode fluorescent lamp of the luminaire.
The inverter circuit is connected to a lamp connection terminal of the lighting fixture by attaching the base to the socket.

In addition, or in addition, the cold cathode fluorescent lamp is composed of a plurality of internal electrode type fluorescent lamps,
The inverter circuit is provided for each fluorescent lamp and supplies high-frequency AC power to the corresponding fluorescent lamp.

In addition, or in addition, the cold cathode fluorescent lamp is composed of a plurality of external electrode fluorescent lamps,
The inverter circuit supplies high-frequency AC power to all of the plurality of fluorescent lamps.

Regarding the lighting fixture according to the second aspect of the present invention, preferably, the lighting fixture is further provided with a hot cathode fluorescent lamp and a starting circuit connected to the lighting circuit,
The starter circuit includes a starter capable of controlling power supply from the ballast to the hot cathode fluorescent lamp by an opening / closing operation.

It is a block diagram which shows the structure of the illuminating device in Embodiment 1 of this invention. It is a perspective view which shows the shape of an illuminating device. It is a perspective view which shows the shape of the hot cathode fluorescent lamp replaced with an illuminating device and attached to a lighting fixture. It is a block diagram which shows the structure of the illuminating device in Embodiment 2 of this invention. It is a block diagram which shows the general structure of the lighting fixture provided with the hot cathode fluorescent lamp. It is a block diagram which shows the general structure of the lighting fixture provided with the cold cathode fluorescent lamp of an internal electrode system. It is a block diagram which shows the general structure of the lighting fixture provided with the cold cathode fluorescent lamp of an external electrode system.

Explanation of symbols

1,20 Lighting device
2 lighting circuit 3, 21 lighting fixture 4 starting circuit 5 AC power source 6 ballast 7, 22 cold cathode fluorescent lamp 8, 23 inverter circuit 10 starter 13 hot cathode fluorescent lamp

Claims (6)

A lighting device attached to a lighting fixture having a hot cathode fluorescent lamp as an arc tube,
A cold cathode fluorescent lamp;
An inverter circuit that inputs power from a lighting circuit of the lighting fixture and supplies high-frequency AC power for lighting the cold cathode fluorescent lamp to the cold cathode fluorescent lamp while being connected to the lamp connection terminal of the lighting fixture. When,
Equipped with a,
A plurality of the cold cathode fluorescent lamps are provided, the plurality of cold cathode fluorescent lamps are arranged on a circumference, and both ends are held by the support members,
The said inverter circuit is integrated in the said supporting member, The illuminating device characterized by the above-mentioned . Further comprising a base attached to a socket for connecting a hot cathode fluorescent lamp of the lighting fixture,
The lighting device is attached to the lighting fixture by fitting the base into the socket,
The lighting device according to claim 1, wherein the inverter circuit inputs power from a lighting circuit of the lighting fixture via the base. The cold cathode fluorescent lamp is composed of a plurality of internal electrode type fluorescent lamps,
The lighting device according to claim 1, wherein the inverter circuit is provided for each fluorescent lamp and supplies high-frequency AC power to the corresponding fluorescent lamp. The cold cathode fluorescent lamp is composed of a plurality of external electrode type fluorescent lamps,
The lighting device according to claim 1, wherein the inverter circuit supplies high-frequency AC power to all of the plurality of fluorescent lamps. The lighting device according to any one of claims 1 to 4,
A hot-cathode fluorescent lamp as a light-emitting tube, and a lighting fixture provided with a lighting circuit for inputting power to the inverter circuit,
The lighting device with a lighting device, wherein the lighting circuit includes an AC power source and a ballast that supplies power from the AC power source to the hot cathode fluorescent lamp and the inverter circuit. The lighting fixture is further provided with a hot cathode fluorescent lamp and a starting circuit connected to the lighting circuit,
The lighting apparatus with a lighting device according to claim 5, wherein the starter circuit includes a starter capable of controlling power supply from the ballast to the hot cathode fluorescent lamp by an opening / closing operation. .

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