JP2006114339A - Illumination control device, and illumination fixture and illumination system including this - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remove power supply return noises generated in a light control device and a discharge lamp lighting device, and reduce the noises. <P>SOLUTION: This illumination fixture 1 is provided with the illumination control device 2, the discharge lamp lighting device 3, and a discharge lamp 5. The illumination control device 2 is connected to the power supply E and a common mode filter 4 is provided in an electric power path from the power supply E. An alternate electric power is supplied to the illumination control device 2 as an operating power from the power supply E via the common mode filter 4. Furthermore, the illumination control device 2 outputs electric power supplied via the common mode filter 4 to the discharge lamp lighting device 3, and also outputs a light control signal to change illuminance of the discharge lamp 5. The discharge lamp lighting device 3 carries out lighting control of the discharge lamp 5 based on the light control signal. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to, for example, an illumination control device that controls a discharge lamp lighting device, a lighting fixture including the same, and a lighting system.

  Conventionally, various lighting fixtures of this type have been proposed and marketed. For example, Patent Literature 1 discloses a lighting fixture 1a as shown in FIG. The luminaire 1a includes a discharge lamp lighting device 3, an illumination control device 8, and a discharge lamp (illumination load) 5.

  The discharge lamp lighting device 3 includes, for example, a rectifier 30, a chopper 31, an inverter circuit 32, and an inverter control unit 33. The operation of the discharge lamp lighting device 3 will be described. First, the chopper 31 boosts the output voltage from the rectifier 30. Next, high frequency power (alternating current) is output to the discharge lamp 5 by alternately turning on and off the switching elements Q2 and Q3. Here, since the coil L4 and the capacitor C6 exist in the power supply path to the discharge lamp 5, depending on the relationship between the ON / OFF cycle (operation frequency) of the switching elements Q2 and Q3 and the resonance frequency by the coil L4, the capacitor C6, and the like. The energy supplied to the discharge lamp 5 is adjusted.

  On the other hand, the illumination control device 8 includes a lighting time detection unit 80, a lighting time timer 81, and an initial illuminance correction control unit (illuminance correction device) 22. The lighting time detector 80 smoothes the output voltage of the rectifier 801, a series circuit 800 of resistors R2 and R3 that divides the voltage of the power supply E, a rectifier 801 that is a diode bridge that rectifies the voltage across the resistor R3 in full wave. And a smoothing capacitor C7. That is, the lighting time timer 81 measures the period during which the voltage across the smoothing capacitor C7 is equal to or higher than the specified voltage.

  From the above, when the power source E is turned on and the voltage across the smoothing capacitor C7 reaches the specified voltage, the lighting time timer 81 performs the initial setting process described above, and sets the lighting time of the discharge lamp 5 from the nonvolatile memory 222 to the previous time. After the readout, the lighting time is given to the dimming ratio setting unit 220. The dimming ratio setting unit 220 checks the lighting time against a correction table stored in the nonvolatile memory 222 and reads the dimming ratio corresponding to the lighting time. The dimming ratio read in this way is given to the dimming signal generation unit 221 to control the output of the inverter circuit 32. In addition, the lighting time timer 81 measures the lighting time and stores the time after the clocking in the nonvolatile memory 222. Thereafter, during the period when the power source E is supplied, the operation from reading the lighting time to the nonvolatile memory 222 and writing the new lighting time to the nonvolatile memory 222 is repeated, and the supply to the discharge lamp 5 is performed according to the lighting time. Adjust the power.

  Moreover, the other lighting fixture 1b shown in FIG. 8 has the function and structure similar to the lighting fixture 1a shown in FIG. The other lighting fixtures 1 b individually supply power from the power source E to the lighting control device 2 and the discharge lamp lighting device 3. The normal mode filter 21 includes capacitors C1 and C2 and a coil (inductor) L1. The rectifier 27 is a single-phase half-wave rectifier circuit including a resistor R1, a diode D1, and a smoothing capacitor C3 in this order from the normal mode filter 21 side. The rectification unit 27 outputs DC power to the initial illuminance correction control unit 22. Similarly to Patent Document 1, the initial illuminance correction control unit 22 increases the dimming signal according to the lighting time of the discharge lamp 5 in order to correct the light beam deterioration due to the deterioration of the discharge lamp 5 with time, and thereby the discharge lamp 5 The initial illuminance correction control is performed to suppress the decrease in luminous flux.

In addition, Patent Document 2 discloses a lighting fixture in which power from a power source is individually supplied to a lighting control device and a discharge lamp lighting device, as in FIG. Patent Document 3 discloses a lighting fixture in which power from a power source is supplied to a discharge lamp lighting device via a lighting control device.
JP 2001-15276 A JP 2000-276938 A JP 2002-246817 A

  However, in the above-described conventional lighting fixtures and the like, each of the lighting control device and the discharge lamp lighting device generates noise, and the noises of both the lighting control device and the discharge lamp lighting device are combined and fed back to the power source (current). Feedback noise). As a result, the conventional lighting fixture described above causes a deterioration in the power supply environment mainly due to noise, as compared with a lighting fixture that does not include a lighting control device but includes only a discharge lamp lighting device (see FIG. 9). (See FIG. 10). Specifically, the noise becomes 5 MHz or less, particularly around 0.5 MHz.

  To solve the above problem, there is a method of individually reducing noise for each of the illumination control device and the discharge lamp lighting device. However, in the above method, it is necessary to fully consider the combination of the illumination control device and the discharge lamp lighting device.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an illumination control device capable of removing power supply feedback noise and reducing noise, and a lighting fixture and a lighting system including the same. It is to provide.

  The invention according to claim 1 is an illumination control device that controls a discharge lamp lighting device connected to a power source and connected to a lighting load, comprising a filter in a power path from the power source, and The operation power is supplied from the power source, and the power supplied through the filter is output to the discharge lamp lighting device.

  In this configuration, power supply feedback noise generated in the illumination control device and the discharge lamp lighting device can be removed, and noise can be reduced.

  According to a second aspect of the present invention, in the first aspect of the present invention, the discharge lamp lighting device performs dimming control on the lighting load, and the illuminance of the lighting load in accordance with a decrease in luminous flux due to deterioration over time of the lighting load. An initial illuminance correction means for outputting a dimming signal to the discharge lamp lighting device is provided so that the brightness increases. With this configuration, it is possible to suppress the decrease in luminous flux of the illumination load.

  According to a third aspect of the present invention, in the first aspect of the present invention, a sensor control unit that controls the discharge lamp lighting device based on detection of a predetermined physical quantity is provided. In this configuration, the discharge lamp lighting device can be controlled based on detection of a predetermined physical quantity.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the discharge lamp lighting device performs dimming control on the lighting load, and adjusts the illuminance of the lighting load based on an external control signal. External control means for outputting an optical signal to the discharge lamp lighting device is provided. In this configuration, the illuminance of the illumination load can be changed based on the external control signal.

  The invention according to claim 5 is the invention according to claim 1, wherein the filter is a common mode filter. In this configuration, power supply feedback noise generated in the illumination control device and the discharge lamp lighting device can be removed, and noise can be reduced.

  The invention described in claim 6 is characterized in that a lighting fixture includes the illumination control device according to any one of claims 1 to 5 and a discharge lamp lighting device connected to the illumination control device.

  In this configuration, power supply feedback noise generated in the illumination control device and the discharge lamp lighting device can be removed, and noise can be reduced.

  According to a seventh aspect of the present invention, an illumination system includes the illumination control device according to any one of the first to fifth aspects.

  In this configuration, power supply feedback noise generated in the illumination control device and the discharge lamp lighting device can be removed, and noise can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the power supply feedback noise which generate | occur | produced with the illumination control apparatus and the discharge lamp lighting device can be removed, and noise can be reduced.

(Embodiment 1)
First, the basic configuration of the first embodiment will be described. The lighting fixture of Embodiment 1 controls the discharge lamp lighting device by the lighting control device to light the discharge lamp (lighting load). As shown in FIG. 1, the lighting control device 2 and the discharge lamp lighting device 3 are used. A discharge lamp 5 is provided.

  The discharge lamp 5 is an illumination load that is provided with electrodes at both ends of a glass tube and is lit and discharged by high-frequency power from the discharge lamp lighting device 3.

  The lighting control device 2 includes a common mode filter 4, a normal mode filter 21, a rectifying unit 27, and an initial illuminance correction control unit 22 in order, and is connected to the power source E at the terminal unit 20 and connected to the discharge lamp lighting device 3 at the terminal unit 23. Connect and control the discharge lamp lighting device 3. A fuse F1 is provided between the common mode filter 4 and the normal mode filter 21. The power source E is a commercial power source, for example, and supplies AC power (commercial power) to the lighting control device 2.

  The common mode filter 4 includes a coil (inductor) L2 and is provided on a path of AC power from the power source E. AC power from the power source E is supplied to the lighting control device 2 via the common mode filter 4, and the lighting control device 2 operates with the supplied AC power. Further, the illumination control device 2 outputs AC power supplied via the common mode filter 4 to the discharge lamp lighting device 3. Thereby, the common mode filter 4 can reduce common mode noise among power supply feedback noise generated in the lighting control device 2 and the discharge lamp lighting device 3. The normal mode filter 21 includes capacitors C1 and C2 and a coil (inductor) L1, and reduces normal mode noise.

  The rectifier 27 is a single-phase half-wave rectifier circuit including a resistor R1, a diode D1, and a smoothing capacitor C3 in this order from the normal mode filter 21 side. The diode D1 performs half-wave rectification on the AC power input from the normal mode filter 21. The smoothing capacitor C3 converts the half-wave rectified power into smooth DC power. The rectification unit 27 outputs the DC power to the initial illuminance correction control unit 22. The rectifying unit 27 is not limited to a single-phase half-wave rectifier circuit, and may be a single-phase full-wave rectifier circuit or the like. Further, when the power source E is three-phase, a three-phase half-wave rectifier circuit, a three-phase full-wave rectifier circuit, or the like may be used.

  The initial illuminance correction control unit 22 includes a dimming ratio setting unit 220 and a dimming signal generation unit 221 (both refer to FIG. 7), and receives DC power from the rectification unit 27 to reduce the luminous flux due to deterioration of the discharge lamp 5 over time. Accordingly, it is initial illuminance correction means for outputting a dimming signal to the discharge lamp lighting device 3 so that the illuminance of the discharge lamp 5 increases accordingly. Thereby, the light flux decline of the discharge lamp 5 can be suppressed. The initial illuminance correction control unit 22 is configured by a microcomputer together with a lighting time timer (not shown). The microcomputer is provided with a nonvolatile memory 222 (see FIG. 7) that is an EEPROM that reads and writes the time measured by the lighting time timer and stores a correction table used by the initial illuminance correction control unit 22. The correction table is a table in which the lighting time of the discharge lamp 5 and the correction light control ratio are associated with each other.

  The dimming ratio setting unit 220 (see FIG. 7) reads the dimming ratio from the nonvolatile memory 222 (see FIG. 7) using the lighting time counted by the lighting time timer (not shown), and A dimming ratio for keeping the light output substantially constant is determined. The dimming signal generation unit 221 (see FIG. 7) generates a dimming signal to be given to an inverter control unit (not shown) based on the dimming ratio determined by the dimming ratio setting unit 220.

  The discharge lamp lighting device 3 includes a rectifier 30, a chopper 31, an inverter circuit 32, and an inverter control unit 33 (all refer to FIG. 7). The discharge lamp lighting device 3 is connected to the initial illuminance correction control unit 22 and the terminal unit 23 on the input side. To connect to the discharge lamp 5. The discharge lamp lighting device 3 can perform dimming control on the discharge lamp 5. AC power from the power source E is supplied to the discharge lamp lighting device 3 via the common mode filter 4 and the terminal portion 23.

  As shown in FIG. 7, the rectifying unit 30 includes a diode bridge that performs full-wave rectification of the power source E. The chopper 31 includes a switching element Q1 formed of a MOSFET via a coil (inductor) L3 between DC output terminals of the rectifier 30, and a series circuit of a diode D1 and a smoothing capacitor C4 is connected between both ends of the switching element Q1. The step-up chopper circuit drives the inverter circuit 32 using the smoothing capacitor C4 as a power source.

  The inverter circuit 32 includes a series circuit of a pair of switching elements Q2 and Q3 made of MOSFETs connected between both ends of the smoothing capacitor C4, and between the both ends of one switching element Q3, a DC cut capacitor C5 and a resonance circuit. A series circuit of a coil (inductor) L4 and a discharge lamp 5 is connected. Switching elements Q2 and Q3 are alternately turned on and off. In addition, a capacitor C6 constituting a resonance circuit is connected with the coil L4 between the non-power supply side ends of both electrodes (filaments) of the discharge lamp 5 (see FIG. 1). The inverter control unit 33 turns on and off the switching elements Q1 to Q3 at a high frequency. Further, the inverter controller 33 receives the dimming signal from the initial illuminance correction controller 22 (see FIG. 1), and controls the ON / OFF cycle (that is, the operating frequency) of the switching elements Q2 and Q3, whereby the discharge lamp 5 The high frequency power supplied to is adjusted.

  Next, operation | movement of the lighting fixture 1 of Embodiment 1 is demonstrated. As shown in FIG. 1, in the lighting control device 2, the common mode filter 4 reduces noise of AC power input from the power source E via the terminal unit 20. That is, in-phase noise (for example, common mode noise) generated at both ends of the terminal unit 20 is canceled by the common mode filter 4 and reduced. The normal mode filter 21 reduces the normal mode noise from the AC power with the same phase noise reduced, and outputs the AC power to the rectifier 27. The rectifying unit 27 converts the AC power that has passed through the normal mode filter 21 into DC power, and outputs the converted DC power to the initial illuminance correction control unit 22.

  In the initial illuminance correction control unit 22, as shown in FIG. 7, after reading the lighting time of the discharge lamp 5 (see FIG. 1) from the nonvolatile memory 222 until the previous time, the lighting time is set in the dimming ratio setting unit 220. give. The dimming ratio setting unit 220 checks the lighting time against a correction table stored in the nonvolatile memory 222 and reads the dimming ratio corresponding to the lighting time. The dimming signal generation unit 221 is given the read dimming ratio and controls the output of the inverter circuit 32. Thereafter, in a period in which AC power is supplied from the power source E, the operation from reading the lighting time to the nonvolatile memory 222 and writing a new lighting time to the nonvolatile memory 222 is repeated.

  On the other hand, the operation of the discharge lamp lighting device 3 will be described. First, the AC power in which the noise of the same phase is reduced is input via the terminal unit 23 (see FIG. 1). The chopper 31 boosts DC power from the rectifier 30. Next, the inverter control unit 33 sets the high frequency power by alternately turning on and off the switching elements Q2 and Q3 based on the dimming signal from the initial illuminance correction control unit 22 (see FIG. 1). Here, the supply energy of the high-frequency power to the discharge lamp 5 (see FIG. 1) is adjusted according to the relationship between the ON / OFF cycle (operation frequency) of the switching elements Q2 and Q3 and the resonance frequency by the coil L4 and the capacitor C6. The high frequency power (alternating current) is output to the discharge lamp 5. The discharge lamp 5 is turned on and off based on the high frequency power.

  From the above, as shown in FIG. 1, the power source E and the lighting control device 2 are connected and the AC power from the power source E is supplied to the lighting control device 2 and the discharge lamp lighting device 3 through the common mode filter 4. The power supply feedback noise generated in each of the illumination control device 2 and the discharge lamp lighting device 3 can be reduced.

  Moreover, the lighting fixture 1 of Embodiment 1 reduces the terminal noise of about 10 dB at 5 MHz or less, especially around 20 MHz or below at about 20 dB as compared with the conventional lighting fixture 1 b (see FIGS. 2 and 9). Furthermore, FIG. 10 shows a terminal noise result in the case where the lighting fixture does not include the lighting control device, that is, only the discharge lamp lighting device. The lighting fixture 1 of Embodiment 1 can reduce a terminal noise to the noise level equivalent to or less than the lighting fixture only of a discharge lamp lighting device.

  As described above, according to the first embodiment, the AC power from the power source E is supplied to the discharge lamp lighting device 3 via the illumination control device 2, and the AC power from the power source E is output to the discharge lamp lighting device 3. By providing the common mode filter 4 in the path, the power supply feedback noise generated in the illumination control device 2 and the discharge lamp lighting device 3 can be removed, and the noise can be reduced.

(Embodiment 2)
As shown in FIG. 3, the second embodiment is the same as the first embodiment in that the luminaire 1 includes the discharge lamp lighting device 3 and the discharge lamp 5. There is. In the second embodiment, the lighting system 6 includes a lighting fixture 1 and a lighting control device 2. That is, in the first embodiment, the illumination control device 2 is provided in the lighting fixture 1, but in the second embodiment, the illumination control device 2 is provided outside the lighting fixture 1.

  As described above, according to the second embodiment, similarly to the first embodiment, the power supply feedback noise generated in the illumination control device 2 and the discharge lamp lighting device 3 can be removed, and the noise can be reduced.

(Embodiment 3)
The third embodiment is the same as the first embodiment in that the luminaire 1 includes the illumination control device 2, the discharge lamp lighting device 3, and the discharge lamp 5 (all refer to FIG. 1), but the following is not in the first embodiment. There are features described. The lighting fixture 1 of Embodiment 3 is provided with the brightness sensor 10 unlike the lighting fixture 1 (refer FIG. 1) of Embodiment 1, as shown in FIG. Moreover, the illumination control apparatus 2 of Embodiment 3 is provided with the brightness control part 24 unlike the illumination control apparatus 2 (refer FIG. 1) of Embodiment 1. FIG. 4 is obtained by replacing the output side (the right side in FIG. 1) with respect to A1 and A2 in FIG. 1, and A1 and A2 in FIG. 4 are connected to A1 and A2 in FIG. 1, respectively.

  The brightness sensor 10 is a sensor unit that is connected to the brightness control unit 24, detects ambient brightness, and outputs a detection signal based on the detection to the brightness control unit 24. The brightness control unit 24 is a sensor control unit that inputs a detection signal from the brightness sensor 10, and based on the detection signal, controls the dimming signal so that the illuminance of the discharge lamp 5 (see FIG. 1) changes. Output to the lighting device 3. For example, the discharge lamp 5 is dimmed so that the ambient brightness becomes a predetermined brightness.

  Next, a difference from the first embodiment regarding the operation of the lighting fixture 1 of the third embodiment will be described. First, the brightness sensor 10 detects ambient brightness. Subsequently, when the brightness is brighter or darker than a predetermined brightness, the brightness control unit 24 sets a dimming signal so that the ambient brightness becomes a predetermined brightness, and the discharge lamp The lighting device 3 (see FIG. 1) is controlled.

  As described above, according to the third embodiment, the same effect as that of the first embodiment can be obtained, and the discharge lamp lighting device 3 (see FIG. 1) can be controlled based on the detection of ambient brightness.

  In addition, although Embodiment 3 was the structure which combined the brightness control apparatus provided with a brightness control part, a brightness sensor, and the light control type discharge lamp lighting device, it is limited to the said structure as a modification of Embodiment 3. However, a combined configuration as shown in Table 1 may be used. Even with such a configuration, the discharge lamp lighting device can be controlled based on detection of a predetermined physical quantity.

(Embodiment 4)
The fourth embodiment is the same as the second embodiment in that the lighting system 6 includes the lighting fixture 1 and the lighting control device 2 (see FIG. 3), but there are the following characteristic portions that are not in the second embodiment. . As illustrated in FIG. 5, the illumination control device 2 according to the fourth embodiment includes a dimming control unit 25, unlike the illumination control device 2 according to the second embodiment (see FIG. 3). 5 is obtained by replacing the output side (right side in FIG. 3) with respect to B1 and B2 in FIG. 3, and B1 and B2 in FIG. 5 are connected to B1 and B2 in FIG. 3, respectively.

  The dimming control unit 25 converts, for example, an external control signal based on an operation of a user or the like into a dimming signal, and the discharge lamp 5 changes the illuminance of the discharge lamp 5 (see FIG. 3) based on the dimming signal. External control means for controlling the lighting device 3 (see FIG. 3). The external control signal is, for example, an LON signal, a DARI signal, a digital signal, or the like. In the fourth embodiment, the external control signal is connected by wire.

  As described above, according to the fourth embodiment, the same effect as that of the second embodiment can be obtained, and the illuminance of the discharge lamp 5 (see FIG. 3) can be changed based on the external control signal.

(Embodiment 5)
The fifth embodiment is the same as the first embodiment in that the luminaire 1 includes the illumination control device 2, the discharge lamp lighting device 3, and the discharge lamp 5 (all refer to FIG. 1), but the following is not in the first embodiment. There are features described. The lighting fixture 1 of Embodiment 5 is provided with the remote control light-receiving part 11, unlike the lighting fixture 1 (refer FIG. 1) of Embodiment 1, as shown in FIG. Moreover, the illumination control apparatus 2 of Embodiment 5 is provided with the remote control part 26 unlike the illumination control apparatus 2 (refer FIG. 1) of Embodiment 1. FIG. 6 is obtained by replacing the output side (right side in FIG. 1) from A1 and A2 in FIG. 1, and A1 and A2 in FIG. 6 are connected to A1 and A2 in FIG. 1, respectively.

  The remote control light receiving unit 11 receives a remote control signal that is a wireless external control signal, for example, based on an operation of a user or the like. The remote control control unit 26 is connected to the remote control light receiving unit 11, inputs a remote control signal received by the remote control light receiving unit 11, converts the remote control signal into a dimming signal, and discharges the lamp based on the converted dimming signal. External control means for controlling the discharge lamp lighting device 3 (see FIG. 1) so that the illuminance of 5 (see FIG. 1) changes.

  As described above, according to the fifth embodiment, the same effect as that of the first embodiment can be obtained, and the illuminance of the discharge lamp 5 (see FIG. 1) can be changed based on the remote control signal.

It is a circuit diagram of the lighting fixture of Embodiment 1 by this invention. It is a figure showing the terminal noise of a lighting fixture same as the above. It is a circuit diagram of the illumination system of Embodiment 2 by this invention. It is a circuit diagram of the lighting fixture of Embodiment 3 by this invention. It is a circuit diagram of the illumination system of Embodiment 4 by this invention. It is a circuit diagram of the lighting fixture of Embodiment 5 by this invention. It is a circuit diagram of the conventional lighting fixture. It is a circuit diagram of the other lighting fixture same as the above. It is a figure showing the terminal noise of a lighting fixture provided only with a discharge lamp lighting device same as the above. It is a figure showing the terminal noise of a lighting fixture provided with the illumination control apparatus same as the above, and a discharge lamp lighting device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 Lighting control device 3 Discharge lamp lighting device 4 Common mode filter 5 Discharge lamp 6 Lighting system E Power supply

Claims (7)

A lighting control device for controlling a discharge lamp lighting device connected to a power source and connected to a lighting load,
A filter is provided in the power path from the power source,
While operating power is supplied from the power source through the filter,
The illumination control device, wherein the power supplied through the filter is output to a discharge lamp lighting device. The discharge lamp lighting device performs dimming control on the illumination load,
The initial illuminance correction means for outputting a dimming signal to the discharge lamp lighting device so as to increase the illuminance of the illumination load in accordance with a decrease in luminous flux due to deterioration with time of the illumination load. Lighting control device.   The illumination control device according to claim 1, further comprising sensor control means for controlling the discharge lamp lighting device based on detection of a predetermined physical quantity. The discharge lamp lighting device performs dimming control on the illumination load,
The illumination control device according to claim 1, further comprising an external control unit that outputs a dimming signal to the discharge lamp lighting device so that the illuminance of the illumination load changes based on the external control signal.   The lighting control apparatus according to claim 1, wherein the filter is a common mode filter. The lighting control device according to any one of claims 1 to 5,
A lighting fixture comprising: a discharge lamp lighting device connected to the lighting control device.   An illumination system comprising the illumination control device according to claim 1.

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