JP2000133480A - Lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the remote controllability of a lighting system. SOLUTION: This lighting system has a structure wherein an A.C. power source 1 is connected at least to a discharge lamp 6 through normal mode filters 2, a rectifier 3, a chopper circuit (pre-regulator) 4 performing high-frequency switching operation and an inverter circuit 5 performing high-frequency switching operation, the discharge lamp 6 is controlled through the inverter circuit 5 by a signal from a remote controlling means 7 into a rated lighting, light-modulated lighting or lighting-out condition, and the ground side of stage subsequent to the rectifier 3 and the ground side of the remote controlling means 7 are common (commonly connected). The lighting system is composed by electrically connecting the ground side to a metal device body 11 through a capacitive means 10 of capacitors.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency inverter-type lighting device controlled by a remote controller.

[0002]

2. Description of the Related Art As shown in FIG. 13, an apparatus of this type includes an AC power supply 1 having at least a normal mode filter 2 and a rectifier 3.
Connected to the discharge lamp 6 via the chopper circuit 4 and the inverter circuit 5, and released via the inverter circuit 5 by a signal from the remote control control means 7 which receives a remote control signal R transmitted from a remote control transmitter (not shown). In general, the lamp 6 is controlled, and the ground side downstream of the rectifier 3 and the ground side of the remote control unit 7 are common.
A common mode filter 8 is also provided as appropriate, and a drive controller 9 is provided between the remote controller controller 7 and the inverter circuit 5 as appropriate. Then, the input side of the normal mode filter 2 is electrically connected to the metal instrument body 11 via the capacitor 10.

[0003]

However, since the chopper circuit 4 is used to improve the power factor, the switching action increases noise on the AC power supply 1 side, and the normal mode filter 2 and the capacitor 10 are provided. However, in this way, the capacitor 10 is
When the electrical connection is made, the high-frequency potential difference generated at both ends of the lower normal mode filter 2 causes the ground-side potential of the remote controller 7 to fluctuate, and disturbance noise is added to the remote controller 7 that handles weak signals. It should be noted that there is a problem to be solved that remote control is not effective. The present invention has been made in view of such problems to be solved, and has as its object to improve remote control control performance.

[0004]

Means for solving the problems are as described in the claims.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described. However, this is merely an exemplary embodiment adopted based on the present invention, and the present invention will be described based on matters unique to the embodiment. Therefore, the technical scope of the present invention should be determined based on the matters stated in the claims and matters substantially equivalent to the matters.

In the embodiment shown in FIG. 1, an AC power supply 1 includes at least a normal mode filter 2, a rectifier 3, a chopper circuit (pre-regulator) 4 for high-frequency switching operation, and an inverter circuit 5 for high-frequency switching operation.
And the discharge lamp 6 is controlled to a state such as rated lighting, dimming lighting, and extinguishment via the inverter circuit 5 by a signal from the remote controller control means 7,
In a configuration in which the ground side downstream of the rectifier 3 and the ground side of the remote control unit 7 are common (commonly connected), the ground side is electrically connected to the metal appliance body 11 via the capacitive unit 10 using a capacitor. Lighting device. Further, a common mode filter 8 is appropriately provided, and a drive control means 9 is appropriately provided between the remote control means 7 and the inverter circuit 5. As the remote control means 7, a means for receiving an infrared remote control signal transmitted from a remote control transmitter (not shown) and outputting a control signal is usually used. With this configuration, in the high frequency region, the ground potential of the remote control unit 7 and the potential of the appliance body 11 match, so that the ground potential of the remote control unit 7 is not fluctuated, and the remote control unit that handles weak signals 7 does not add disturbance noise. As a result, the remote control performance can be greatly improved.
FIG. 2 shows that the insertion position of the normal mode filter 2 is changed to a stage after the rectifier 3. As described above, the normal mode filter 2 may be inserted before or after the rectifier 3, and the interpretation of the claims may be made accordingly.

FIG. 3 shows that an AC power supply 1 is connected to a discharge lamp 6 via at least a normal mode filter 2, a rectifier 3 and an inverter circuit 5 which also serves as a chopper circuit. In a configuration in which the discharge lamp 6 is controlled through the rectifier 3 and the ground side of the rectifier 3 and the ground side of the remote control unit 7 are common, the ground side is electrically connected to the metal appliance body 11 through the capacitive unit 10. It is a connected lighting device. Also in this case, similarly, the remote control performance is greatly improved. FIG. 4 shows a modified configuration of the inverter circuit 5 also serving as a chopper circuit. Here, it is called a composite inverter circuit. Further, the hot side (upper line in FIGS. 3 and 4) on the output side of the rectifier 3 may be electrically connected to the metal appliance body 11 via the same capacitive means 10. In this case, the insertion position of the normal mode filter 2 is changed to the subsequent stage of the rectifier 3 as in FIG.
0 may be connected to the instrument body 11. Therefore, Claim 3 stipulates that "..., the hot side of the output side of the rectifier and the normal mode filter is electrically connected to the metal appliance body via capacitive means."

FIG. 5 shows that an AC power supply 1 is connected to a discharge lamp 6 via at least a normal mode filter 2, a rectifier 3, a chopper circuit 4 and an inverter circuit 5. In a configuration in which the discharge lamp 6 is controlled via the rectifier 3 and the ground side of the remote controller 7 is common to the ground side downstream of the rectifier 3, the hot side at the output side of the chopper circuit 4 is made of metal through the capacitive element 10. The lighting device is electrically connected to the fixture body 11. Also in this case, similarly, the remote control performance is greatly improved. FIG. 6 shows an arrangement in which the insertion position of the normal mode filter 2 is changed to a stage subsequent to the rectifier 3.

FIGS. 7 and 8 show that an AC power supply 1 is connected to a discharge lamp 6 via at least a normal mode filter 2, a rectifier 3, a chopper circuit 4 and an inverter circuit 5, and an inverter circuit is provided by a signal from a remote control means 7. In a configuration in which the discharge lamp 6 is controlled via the rectifier 5 and the ground side of the rectifier 3 and the ground side of the remote control unit 7 are common, the output side of the rectifier 3 and the chopper circuit 4 on the output side of the normal mode filter 2 This is a lighting device in which the hot side is electrically connected to a metal fixture body 11 via a capacitive means 10. Also in this case, similarly, the remote control performance is greatly improved. 7 and 8 are different in the position where the normal mode filter 2 is inserted. In FIG. 7, the normal mode filter 2 is inserted before the rectifier 3 and in FIG.

FIG. 9 shows that the AC power supply 1 is connected to the discharge lamp 6 via at least the normal mode filter 2, the rectifier 3, the chopper circuit 4 and the inverter circuit 5, and the inverter circuit 5 is operated by a signal from the remote controller 7. In a configuration in which the discharge lamp 6 is controlled via the rectifier 3 and the ground side of the rectifier 3 and the ground side of the remote control unit 7 are common, the input side of the rectifier 3 is connected to the output side of the normal mode filter 2 through the capacitive unit 10. The lighting device is electrically connected to the metal fixture body 11. Also in this case, similarly, the remote control performance is greatly improved. FIG. 10 shows a configuration in which each capacitive means 10 is individually electrically connected to a metal instrument body 11.

9 and 10 can be applied to FIGS. 3 and 4. In FIGS. 3 and 4, the output of the normal mode filter 2 and the input of the rectifier 3 are connected to the capacitive means 10. Even if it is electrically connected to the metal instrument main body 11 via this, it contributes to improvement of remote control performance.

FIG. 11 shows that an AC power supply 1 is connected to a discharge lamp 6 via at least a normal mode filter 2, a rectifier 3, a chopper circuit 4 and an inverter circuit 5, and
Inverter circuit 5 according to a signal from remote control means 7
In the configuration in which the discharge lamp 6 is controlled via the rectifier 3 and the ground side of the rectifier 3 and the ground side of the remote control unit 7 are common, the metal radiator plate 13 to which the power switching element 12 constituting the inverter circuit 5 is attached is provided. The lighting device is connected to the ground via a capacitor 14 and electrically connected between the metal radiator plate 13 and the metal fixture body 11 by the capacitive means 10. FIG. 12 shows that the metal heat radiating plate 13 is directly connected to the ground side, and the metal heat radiating plate 13 and the metal appliance main body 11 are electrically connected by the stray capacitive capacitive means 10 made of an insulating thin film. Things.

FIGS. 11 and 12 are also applied to FIG. 3, and the above-described metal radiator plate to which the power switching element 12 constituting the inverter circuit 5 is attached is connected to the ground side via a capacitor or directly. With
It is preferable to electrically connect the metal radiator plate and the metal instrument body 11 by capacitive means.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing an embodiment of the present invention.

FIG. 2 is a circuit block diagram showing another embodiment of the present invention.

FIG. 3 is a circuit block diagram showing still another embodiment of the present invention.

FIG. 4 is a circuit block diagram showing still another embodiment of the present invention.

FIG. 5 is a circuit block diagram showing still another embodiment of the present invention.

FIG. 6 is a circuit block diagram showing still another embodiment of the present invention.

FIG. 7 is a circuit block diagram showing still another embodiment of the present invention.

FIG. 8 is a circuit block diagram showing still another embodiment of the present invention.

FIG. 9 is a circuit block diagram showing still another embodiment of the present invention.

FIG. 10 is a circuit block diagram showing still another embodiment of the present invention.

FIG. 11 is a circuit block diagram showing still another embodiment of the present invention.

FIG. 12 is a circuit block diagram showing still another embodiment of the present invention.

FIG. 13 is a circuit block diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 AC power supply 2 Normal mode filter 3 Rectifier 4 Chopper circuit 5 Inverter circuit 6 Discharge lamp 7 Remote control means 10 Capacitive means 11 Appliance body

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3K072 AA01 BA03 BA05 BC01 BC03 CA16 FA05 FA07 FA09 GA03 GB12 GC04

Claims (9)

[Claims] An AC power supply is connected to a discharge lamp via at least a normal mode filter, a rectifier, a chopper circuit, and an inverter circuit, and the discharge lamp is controlled via a inverter circuit by a signal from a remote control unit. A lighting device in which the ground side of the subsequent stage and the ground side of the remote control unit are common, and the ground side is electrically connected to a metal fixture body via a capacitive unit. 2. An AC power supply is connected to the discharge lamp via at least a normal mode filter, a rectifier, and an inverter circuit serving also as a chopper circuit, and the discharge lamp is controlled via the inverter circuit by a signal from a remote control unit. A lighting device in which a ground side downstream of a rectifier and a ground side of a remote control unit are common, and the ground side is electrically connected to a metal fixture body via a capacitive unit. 3. An AC power supply is connected to the discharge lamp via at least a normal mode filter, a rectifier and an inverter circuit serving also as a chopper circuit, and the discharge lamp is controlled via the inverter circuit by a signal from a remote control means. A lighting device in which a hot side of an output side of a rectifier and a normal mode filter is electrically connected to a metal fixture body via a capacitive means in a configuration in which a ground side downstream of a rectifier and a ground side of a remote control unit are common. 4. An AC power supply is connected to a discharge lamp via at least a normal mode filter, a rectifier, a chopper circuit, and an inverter circuit, and the discharge lamp is controlled via the inverter circuit by a signal from a remote control unit. A lighting device in which a hot side of an output side of a chopper circuit is electrically connected to a metal fixture body via a capacitive element in a configuration in which a ground side of a subsequent stage and a ground side of a remote control unit are common. 5. An AC power supply is connected to a discharge lamp via at least a normal mode filter, a rectifier, a chopper circuit and an inverter circuit, and the discharge lamp is controlled via the inverter circuit by a signal from a remote control means. In the configuration in which the ground side of the latter stage and the ground side of the remote control means are common, the hot side between the rectifier and the chopper circuit is electrically connected to the metal appliance body via the capacitive means on the output side rather than the normal mode filter. Lighting equipment. 6. An AC power supply is connected to the discharge lamp via at least a normal mode filter, a rectifier, a chopper circuit and an inverter circuit, and the discharge lamp is controlled via the inverter circuit by a signal from a remote control unit. A lighting device in which a ground side of a subsequent stage and a ground side of a remote control unit are common, and an output side of a normal mode filter and an input side of a rectifier are electrically connected to a metal fixture body via a capacitive unit. 7. An AC power supply is connected to the discharge lamp via at least a normal mode filter, a rectifier, and an inverter circuit serving also as a chopper circuit, and the discharge lamp is controlled via the inverter circuit by a signal from a remote control unit, An illumination device in which a ground side of a stage subsequent to a rectifier and a ground side of a remote control unit are common, and an output side of a normal mode filter and an input side of the rectifier are electrically connected to a metal fixture main body through a capacitive unit. 8. An AC power supply is connected to the discharge lamp via at least a normal mode filter, a rectifier, a chopper circuit, and an inverter circuit, and the discharge lamp is controlled via the inverter circuit by a signal from a remote control unit, and is controlled by the rectifier. In a configuration where the ground side of the subsequent stage and the ground side of the remote control unit are common, a metal radiator plate to which a power switching element forming an inverter circuit is attached is connected to the ground side, and the metal radiator plate and the metal appliance body A lighting device in which electrical connections are made by capacitive means. 9. An AC power supply is connected to the discharge lamp via at least a normal mode filter, a rectifier, and an inverter circuit serving also as a chopper circuit, and the discharge lamp is controlled via the inverter circuit by a signal from a remote control unit. In a configuration in which the ground side downstream of the rectifier and the ground side of the remote control unit are common, a metal radiator plate to which a power switching element constituting an inverter circuit is attached is connected to the ground side, and the metal radiator plate and the metal radiator plate A lighting device in which the fixture bodies are electrically connected by capacitive means.