JP2014022161A - Illuminating device, and illumination system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illuminating device and an illumination system capable of being applied to both first phase control means correcting a conduction phase on the basis of at least one of a phase control output and an inputted AC voltage value, and second phase control means performing phase control of an AC power supply voltage depending on a light-control signal, and of making an optical output be a required one corresponding to the light-control signal.SOLUTION: Any one of voltage detection means 32 and conduction phase detection means 33 is selected so as to correspond to first phase control means 2 or second phase control means 2'. In the first phase control means 2, even if an actual striking phase is corrected by using a striking phase based on a light-control signal, a phase control output voltage value is detected to control an output of lighting means 31. In a case that an output from the second phase control means 2' is supplied, the conduction phase detection means 32 is validated by means of selection means 35.

Description

  One embodiment of the present invention relates to an illuminating device that performs dimming lighting of a solid state light emitting element using a phase control means.

  Conventionally, for example, a device disclosed in Patent Document 1 has been proposed as a device for dimming and lighting a solid light emitting element such as a light emitting diode.

  Japanese Patent Application Laid-Open No. 2004-260688 uses a phase control unit that conducts at an ignition phase corresponding to a dimming signal to dim and light up a light-emitting diode and rectifies and smoothes the output of the phase control unit. A switching circuit is provided that is supplied with the output of the DC power supply unit and controls the power supplied to the light emitting diode. Then, the lighting phase or output voltage value is detected from the output of the phase control means to obtain the dimming signal (dimming level), and the output of the switching circuit is changed in accordance with the obtained dimming signal. It has become.

  On the other hand, as a conventional phase control means using a light bulb or the like as a load, one that simply controls the phase of an AC power supply voltage according to a dimming signal and outputs it is known. Further, as another phase control means, one that compensates for a power supply voltage variation or the like has been proposed. Such a phase control means detects the input AC power supply voltage value or the output voltage value that is phase-controlled by itself, and corrects the ignition phase so that the phase control output becomes a predetermined value corresponding to the dimming signal. To do. A lighting device that uses a light bulb as a load generally supplies the output of the phase control means to the light bulb as it is. Therefore, even if the AC power supply voltage fluctuates, the dimming level indicated by the dimming signal with respect to the load It is possible to supply electric power according to the level of light, and the load can be dimmed with high accuracy at a required dimming level.

JP 2010-205738 A

  As in Patent Document 1, in the case of extracting the dimming level signal from the phase control output, depending on the combination of the phase control unit that corrects the ignition phase and the phase control unit that does not correct the lighting phase as described above, There is a problem that the light output is not desired.

  For example, when an illuminating device that detects the ignition phase is connected to the phase control means that corrects the ignition phase, the ignition phase detected by the illuminating device is the same as the ignition phase corrected by power supply voltage fluctuation or the like. turn into. If the output of the switching circuit is controlled based on such a corrected ignition phase (shifted from the ignition phase corresponding to the dimming signal), the optical output corresponding to the dimming signal cannot be obtained. Therefore, in this case, it is preferable to use a lighting device of a type that detects the output voltage value of the phase control means.

  In addition, when an illuminating device that detects the voltage value (effective value or average value) of the phase control output is connected to the phase control means that does not correct the ignition phase, the output voltage value fluctuates due to power supply voltage fluctuations, etc. Then, following the voltage fluctuation, the light output becomes different from the dimming signal. Therefore, in this case, it is preferable to use a lighting device that detects the ignition phase.

  As described above, depending on the type of the phase control means, it is necessary to select which type of illumination device should be selected from among the illumination devices that detect the ignition phase or the phase-controlled output voltage value. .

  If it is an environment where only a lighting device such as Patent Document 1 that converts the phase control output into a smoothed DC voltage and obtains a dimming signal from the phase control output and dimming the solid light emitting element is used, For example, it is possible to solve the above problem by using only a phase control unit that does not correct the ignition phase, and a lighting device that detects the ignition phase.

  However, for example, in a television studio, a stage, or the like, there are cases in which a lighting device with a light bulb as a load and a lighting device with a solid light-emitting element as a load are used together. Also, there are cases where the phase control means that corrects the ignition phase and the phase control means that does not correct are properly used on the premise of the light bulb load in places where high-precision light control lighting is required and places where accuracy is not so required. is there. Therefore, it is not possible to specify which type of phase control means is associated with the illumination device having the solid light-emitting element as a load, and the above problem occurs.

  The present invention has been made in view of such circumstances, and can be applied to either a phase control unit that corrects the ignition phase (or extinction phase) or a phase control unit that does not correct the phase. And it aims at providing the illuminating device using the solid light emitting element which can obtain the required light output according to the light control signal.

  An illumination device according to an embodiment of the present invention includes a lighting unit that turns on a solid state light emitting element by converting an output of a phase control unit to DC power, a voltage detection unit that detects an output voltage value of the phase control unit, and a phase control unit. Conduction phase detection means for detecting the conduction phase from the output is provided. Further, any one of the output control means, the voltage detection means, and the conduction phase detection means for changing the output of the lighting means according to the output voltage value detected by the voltage detection means or the conduction phase detected by the conduction phase detection means. It has a selection means to act selectively.

  In the present invention, the solid light emitting element is typically a light emitting diode, but may be another element such as a semiconductor laser or an organic EL element, and the number thereof may be one or more.

  The lighting means converts the output of the phase control means to DC power, and changes the supply amount of the DC power to the solid state light emitting device. Therefore, the lighting means has a DC power supply unit that rectifies and smoothes the phase control output at the input unit. Various means can be appropriately used as a means for changing the amount of power supplied to the solid state light emitting element as long as the object can be achieved. For example, it can be constituted by a DC / DC converter having a switching device, a type in which a direct current from a direct current power supply unit is controlled by a switching device or the like, and a type in which a supply voltage is also subjected to pulse width control (PWM). . In the case of a DC / DC converter, a step-up chopper, a step-down chopper, a step-up / step-down chopper, etc. are allowed. Functionally, the load characteristic may have a constant voltage characteristic, a constant current characteristic, or a constant power characteristic.

  The phase control means is a so-called front-cut phase control that conducts from the middle of every half cycle of AC voltage and becomes non-conductive near the next zero cross, and conducts from near the zero cross of every half cycle of AC voltage. There are known so-called post-cut phase control that becomes non-conductive in the case of the above, or one that conducts only in the middle of every half cycle of the AC voltage, but the present invention can be applied to any phase control means.

  The voltage detecting means can be designed by appropriately adopting a method of detecting the output voltage of each half cycle of the AC voltage from the phase control means by converting it into an effective value or an average value, or other methods.

  The conduction phase detecting means detects a phase in which the phase control means is conducted or a period during which the phase control means is conducted. For example, measure the time from the zero cross point of the rising (front-cut phase control) or falling (rear-cut phase control) phase of the output voltage waveform of each half cycle of the AC voltage that is the output voltage from the phase control means. The method of detecting by detecting, the method of measuring and detecting the period when the voltage of every half cycle is generated, the method of detecting by subtracting the voltage zero period from the half cycle period of AC voltage, or other methods are adopted as appropriate. Can be designed.

  For example, the output control means can be configured to control the on / off time and cycle of a switching device of a DC / DC converter that constitutes the lighting means and a switching device that controls switching of a direct current or a direct voltage. However, the present invention is not limited to these, and the output can be appropriately controlled corresponding to the lighting means.

  At least a part of the output control means and the voltage detection means and the conduction phase detection means can be configured using an integrated circuit such as an IC, a microcomputer, or a digital signal processor or an arithmetic processing unit.

  The selection means may select either voltage detection means or conduction phase detection means by operating a switch or the like, or may be selected by remote operation such as a remote control. In addition, the relationship between the voltage waveform of the half cycle when the AC power supply is normal and the conduction phase is stored in advance, and the power supply voltage is intentionally varied at the time of installation, and how the conduction phase changes at this time. It may be determined and automatically switched and selected. Such a configuration can be easily configured when an arithmetic processing unit such as a microcomputer or a digital signal processor is used as described above.

  In addition, the term “selectively act” means that when the detection operation itself of the voltage detection means or the conduction phase detection means is controlled, or when the input of the detection signal to the output control means is controlled instead of the detection operation itself, The detection signal may be selected in any case.

  An illumination device according to an embodiment of the present invention includes a voltage detection unit that detects an output voltage value of the phase control unit and a conduction phase detection unit that detects a conduction phase from the output of the phase control unit. Therefore, even if combined with a phase control means that corrects the conduction phase or a phase control means that does not correct the conduction phase, the selection means The output of the lighting means can be controlled according to the voltage value or the conduction phase. For this reason, it is possible to obtain a required light output corresponding to the dimming signal regardless of the type of phase control means.

  According to an embodiment of the present invention, it is possible to cope with both a phase control unit that corrects a conduction phase and a phase control unit that does not correct, and a dimming signal can be combined with any type of phase control unit. The required light output according to the can be obtained.

The circuit diagram which shows one Embodiment of this invention. The circuit diagram which shows an example of a 2nd phase control means. It is a wave form diagram for explaining an operation, (a) is an alternating current power supply voltage waveform, and (b) is a phase control output waveform. The figure which shows the relationship between a light control signal and a phase control output voltage value.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a circuit diagram showing an embodiment of the present invention. Reference numeral 1 denotes a commercial AC power source, for example, and the first phase control means 2 is connected to the AC power source 1. The first phase control means 2 includes a phase control circuit 21 composed of a thyristor, a triac, or other switching elements, and an ignition circuit 22 that controls the conduction phase of the phase control circuit 21 according to the dimming signal. doing. That is, this embodiment shows a front-cut phase control means. However, in the case of the post-cut phase control means, an arc extinguishing circuit is used in which the phase control circuit 21 is turned on from the vicinity of the zero cross and the phase control circuit 21 is turned off at a phase corresponding to the dimming signal.

  The dimming signal is, for example, a signal for dimming the light source continuously or stepwise between 0 to 100%. For example, a DMX signal (controlling lighting and stage effects) transmitted from the dimming console of the stage or studio Communication protocol DMX512), a voltage signal that changes according to the operation of a DC level signal, a fader or the like, or a variable resistor incorporated in the ignition circuit 22 changes according to the operation of a volume provided on the wall surface or the like. The signal obtained by

  The ignition circuit 22 provides an ignition phase control signal to the phase control circuit 21 in accordance with a dimming signal that is input or is generated by itself. For example, the ignition circuit 22 has a conversion table related to the relationship between the dimming signal and the output voltage value (for example, effective value). As illustrated in FIG. 4, this relationship associates an output voltage value with a dimming signal indicating a dimming level of 0% to 100%. In the example of FIG. 4, the output voltage is zero between 0% and about 3%, and then the output voltage rises. Further, the output voltage curve of FIG. 4 is selected so as to be a pseudo exponential function curve in which the brightness change of the load rises gently during the low level period.

  The ignition circuit 22 determines the ignition phase according to the conversion table in accordance with the input dimming signal. An inductor 23 is connected to the output side of the phase control circuit 21. The inductor 23 contributes to relaxation of the rise of the phase control voltage, suppression of ringing, and the like.

  The first phase control means 2 has voltage detection means 24 for detecting the output voltage of the phase control circuit 21. The detection signal of the voltage detection means 24 is input to the ignition circuit 22. With this signal, the ignition circuit 22 corrects the ignition phase so that the actual phase control output corresponds to the dimming signal. Therefore, even if there is a power supply voltage fluctuation, a phase control output corresponding to the dimming signal is obtained. The voltage detection means 24 can be configured by a transformer, a resistance voltage dividing circuit, or the like.

  The illuminating device 3 is connected to the first phase control means 2 by two wires, and includes a lighting means 31, a voltage detection means 32, a conduction phase detection means 33, an output control means 34, and a selection means 35. The lighting means 31 has a full-wave rectifier 36 and a DC / DC converter 37 in this embodiment. Although not shown, smoothing means such as a smoothing capacitor and an active filter are provided on the output side of the full-wave rectifier 36. The DC / DC converter 37 can use a step-down chopper or a step-up chopper corresponding to the full load voltage of the solid-state light emitting element 4 to be lit.

  The voltage detection means 32 detects an effective value or an average value of the output voltage of the phase control device 2 through a voltage obtained by rectifying the input voltage of the full-wave rectifier 36 or an output DC voltage via an integration circuit or the like.

  The conduction phase detection means 33 detects the conduction phase of the first phase control device 2, that is, the ignition phase in the present embodiment, from the input waveform of the full-wave rectification device 36 or the output rectification waveform.

  The output control unit 34 controls the output of the DC / DC converter 37 according to the detection signal of the voltage detection unit 32 or the conduction phase detection unit 33. As a specific example, the on-duty (on period / one cycle) of the switching device (not shown) of the DC / DC converter 37 is controlled in accordance with the detection signal. Thereby, the output of the DC / DC converter 37 is controlled, and the light output of the solid state light emitting device 4 is changed.

  The selection means 35 selects either the voltage detection means 32 or the conduction phase detection means 33 to effectively act either one. For example, one of the detection signals of the voltage detection means 32 and the conduction phase detection means 33 is selectively input to the output control means 34.

  FIG. 2 is a circuit diagram showing an example of the second phase control means 2 ′. The second phase control device 2 'in FIG. 2 is obtained by omitting the voltage detection means 24 from that in FIG. Accordingly, the same parts as those in FIG. 1 are denoted by the same reference numerals. The ignition circuit 22 in FIG. 2 does not have to have a function of correcting the ignition phase in accordance with the voltage detection signal, but for simplification, the same reference numerals as those in FIG. It is. The ignition circuit 22 in FIG. 2 has a conversion table that determines the ignition phase corresponding to the dimming signal. The contents of this conversion table are the same as those in FIG. 4, and the output voltage is zero between 0% and about 3% with respect to the dimming signal, and then the output voltage rises. It is possible to establish an ignition phase relationship in which an output voltage is output such that a pseudo exponential curve that rises gently during a period of low brightness.

  FIG. 1 shows the relationship between one first phase control means 2 and one lighting device 3, but a plurality of lighting devices 3 are connected in parallel to one first phase control means 2. The form and the form which connects the illuminating device 3 and the illuminating device of other loads, such as a light bulb, in parallel may be sufficient. A plurality of first phase control means 2 and second phase control means 2 'are connected to the AC power source 1, and one or a plurality of lighting devices 3 and lighting devices of other loads are connected to each of them. The lighting device 3 and the lighting device of another load may be mixed and connected.

  Next, the operation of this embodiment will be described with reference to FIG.

  First, as shown in FIG. 1, the illumination device 3 is connected to a first phase control device 2 that corrects the conduction phase based on at least one of its own phase control output and input power supply voltage value. The case will be described. In this case, the selection means 35 inputs the detection signal of the voltage detection means 32 to the output control means 34 so that the voltage detection signal becomes effective for the following control.

While the first phase control means 2 and the lighting device 3 are in operation, the voltage may decrease as shown by the broken line in FIG. The solid line in FIG. 3A shows the power supply voltage waveform at normal time. As described above, when the power supply voltage is lowered, the phase control output phase-controlled according to the dimming signal is lower than the output when the voltage is normal. The voltage detection means 24 of the first phase control means 2 detects this lowered output voltage and inputs this detection signal to the ignition circuit 22. The ignition circuit 22 corrects the ignition phase so as to reduce the difference between the voltage value corresponding to the dimming signal and the detection signal. As a result, the actual ignition phase is shown in FIG. As shown by the broken line, the phase is before the voltage is normal (solid line).

  As a result, when a lighting device (not shown) having a light bulb as a load is energized by the first phase control means 2, the light bulb load can be lit with power corresponding to the dimming signal, and the required brightness Can be obtained.

  On the illuminating device 3 side, since the voltage detection means 32 is selected by the selection means 35, a detection signal corresponding to the output voltage value of the first phase control means 2 is input to the output control means 34. The output control means 34 can know the dimming signal (dimming level) from the output voltage value, for example, by holding the conversion table having the relationship shown in FIG. Therefore, the output of the lighting means 31 can be controlled in accordance with the effective value or average value of the phase control output voltage even though the ignition phase is corrected. Thereby, the solid light emitting element 4 can be lighted with electric power according to the dimming signal, and a required brightness can be obtained.

  On the other hand, assuming that the conduction phase detection means 33 is selected, the output of the lighting means 31 is controlled by a control signal different from the actual dimming signal by the corrected ignition phase, and the light output Is different from the dimming signal.

  Next, the case of connecting to the second phase control means 2 ′ will be described. In this case, the detection signal of the conduction phase detection means 33 is input to the output control means 34 so that the selection means 35 enables the conduction phase detection signal.

  The ignition circuit 22 of the second phase control means 2 ′ ignites the phase control circuit 21 at a phase corresponding to the dimming signal without correcting the ignition phase even if the power supply voltage fluctuates. Therefore, the conduction phase detection means 33 detects this ignition phase and inputs it to the output control means 34. Thereby, the output control means 34 controls the lighting means 31 to output power corresponding to the dimming signal by having a conversion table between the dimming signal and the ignition phase, for example, like the ignition circuit 22. To do.

  On the other hand, when the voltage detection means 32 is selected, the detected voltage value also changes as the voltage value changes due to the power supply voltage fluctuation even if the ignition phase is the same, and the output control means 34 outputs the output of the lighting means 31. Is different from the dimming signal.

  When a lighting device (not shown) having a light bulb as a load is energized from the second phase control means 2 ′, the supply power fluctuates by the amount of increase or decrease of the voltage due to power fluctuation in the light bulb load. The brightness also varies. That is, the accuracy is inferior to that of the first phase control means 2.

  As mentioned above, although demonstrated centering on preferable embodiment of this invention, this invention is not limited to the above-mentioned embodiment, In the range which does not deviate from the main point of this invention, a various deformation | transformation is accept | permitted.

  DESCRIPTION OF SYMBOLS 1 ... AC power supply, 2 ... 1st phase control means, 2 '... 2nd phase control means, 3 ... Illuminating device, 4 ... Solid light emitting element, 31 ... Lighting means, 32 ... Voltage detection means, 33 ... Conduction phase Detection means, 34 ... output control means, 35 ... selection means.

Claims (2)

A variable output lighting means for lighting the solid state light emitting device by converting the output of the phase control means into direct current power;
Voltage detection means for detecting the output voltage value of the phase control means;
Conduction phase detection means for detecting a conduction phase from the output of the phase control means;
Output control means for changing the output of the lighting means according to the output voltage value detected by the voltage detection means or the conduction phase detected by the conduction phase detection means;
Selection means for selectively operating any one of the voltage detection means and the conduction phase detection means;
An illumination device comprising: The phase of the AC power supply voltage is controlled in accordance with the dimming signal, and the ignition phase in accordance with the dimming signal is corrected based on at least one of its own phase control output and input power supply voltage value. First phase control means;
Second phase control means for phase-controlling the AC power supply voltage according to the dimming signal;
Variable output lighting means for converting the output of the first or second phase control means into DC power to light the solid state light emitting device;
Voltage detection means capable of detecting the output voltage value of the first or second phase control means;
Conduction phase detection means capable of detecting the conduction phase from the output of the first or second phase control means;
Output control means for changing the output of the lighting means according to the output voltage value detected by the voltage detection means or the conduction phase detected by the conduction phase detection means;
Selection means for operating the voltage detection means when supplied with the phase control output from the first phase control means, and the conduction phase detection means when supplied with the phase control output from the second phase control means;
A lighting system comprising:

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