JP2015128034A - LED lighting control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lighting control system which can control, with a simple circuit configuration, a plurality of LED lighting devices, can simultaneously drive a normal lighting device, and can perform control using wiring of a conventional lighting device.SOLUTION: An LED lighting control system 100 is configured by: a control signal 40 for an LED element which is input from the outside; a modulation unit 30 composed of a modulation circuit 30a for modulating AC power by using the control signal 40; and at least one LED lighting device to which modulation AC power from the modulation unit 30 is input. The LED lighting device includes: a demodulation circuit for demodulating the control signal from the modulation AC power; and a lightning circuit to which the modulation AC power is input and which controls the LED element according to the control signal.

Description

  The present invention relates to an LED illumination device using an LED element as a light source, and more particularly to an LED illumination control system capable of controlling light emission of an LED illumination device by a control signal.

In recent years, LED lamps using LED elements excellent in power saving as light sources have been actively used due to increasing environmental awareness. Particularly recently, an LED lighting device has been developed that can use an existing dimmer as it is to control the LED drive circuit and perform dimming.

  For example, in Patent Document 1, a TRIAC dimmer that controls the phase of an AC current of an AC power supply by a triac, a rectifier circuit that rectifies an AC current that is phase-controlled by a triac dimmer, and a rectifier that has been rectified. A low-pass filter that allows a current having a predetermined frequency or less to pass through, a series circuit of a primary winding of a transformer and a switching element connected to both ends of the capacitor, and a switching element to be turned on / off with a constant ON width. LED lighting having a plurality of LED elements connected in series at both ends of a control circuit that converts the current from the low-pass filter into a pulse current and a rectifying and smoothing circuit that rectifies and smoothes the pulse current flowing through the secondary winding A circuit is disclosed.

However, in the LED illumination circuit described in Patent Document 1, light control is performed on a plurality of LED elements in accordance with the output of a rectifier circuit that rectifies an alternating current phase-controlled by a triac dimmer.
Therefore, when dimming a plurality of LED elements and driving a normal lighting device at the same time by the output of a rectifier circuit that rectifies an AC current, the normal lighting device is driven by this AC current because of the phase-controlled AC current. It is a difficult LED lighting circuit to drive directly.

JP 2011-28954 A

In view of the above problems, the problem to be solved by the present invention is to control a plurality of LED lighting devices with a simple circuit configuration and to simultaneously drive a normal lighting device. Provide a system. Furthermore, it is providing the LED illumination control system which can also control using the wiring of the conventional illuminating device.

As a first means for solving the above problems, the present invention provides a control signal for an LED element input from the outside, a modulation unit including a modulation circuit that modulates AC power using the control signal, The LED lighting device includes a demodulating circuit that demodulates a control signal from the modulated AC power, and according to the control signal in a lighting circuit to which the modulated AC power is input. An LED illumination control system characterized by controlling an LED element is provided.

According to the present invention, as a second means for solving the above problem, in the first solution means, the modulation circuit outputs an AC power output in the vicinity of the zero cross point of the AC power in a time set according to the control signal. The LED lighting control system is characterized in that it performs modulation to perform zero output and the demodulation circuit measures the time of zero output near the zero crossing point of the modulated AC power and demodulates it from the time of zero output to a control signal. To do.

The present invention provides a third means for solving the above-mentioned problems. In the first solution means, the modulation circuit has AC power in the vicinity of the zero cross point of AC power with or without zero output set according to the control signal. LED lighting that performs modulation based on the presence or absence of zero output that does not output, and the demodulation circuit determines the presence or absence of zero output near the zero cross point of the modulated AC power and demodulates the presence or absence of zero output to a control signal A control system is provided.

According to the present invention, an LED illumination comprising an LED illumination device that is connected based on a control signal obtained by demodulating a control signal from a modulated AC power, in which a synthesis unit that modulates AC power using a control signal and the LED illumination device are connected by an AC power line. A control system is configured.
Accordingly, it is possible to provide an LED illumination control system capable of controlling a plurality of LED illumination devices with a simple circuit configuration and simultaneously driving a normal illumination device. Furthermore, it is providing the LED illumination control system which can also control using the wiring of the conventional illuminating device.
In addition, since the LED lighting device can be controlled by checking the setting of the control signal for each half wave of the AC power with respect to the control signal, it is possible to perform control in response to the control signal.

It is a feed connection schematic block diagram of the LED illumination control system of this invention. It is a parallel connection schematic block diagram of the LED illumination control system of this invention. It is LED illuminating device A schematic block diagram used for this invention. It is LED illuminating device B schematic block diagram used for this invention. It is a power modulation circuit waveform diagram of Example 1 used for the present invention. It is a control signal distributor waveform diagram of Example 1 used for the present invention. It is a power modulation circuit waveform diagram of Example 2 used for the present invention. It is a control signal divider | distributor waveform figure of Example 2 used for this invention.

Preferred embodiments of the present invention will be described below in detail with reference to the drawings. This embodiment is an example, and the present invention is not limited to this.
As an example of the LED lighting control system 100, AC power is modulated with a control signal, and the LED lighting device is controlled by demodulating the control signal from the modulated AC power in a plurality of LED lighting devices connected to the AC power line. The case will be described.

(1. LED lighting control system)
As shown in FIGS. 1 and 3, the LED lighting control system 100 is operated by inputting AC power from a commercial power source 10 to a modulation unit 30 via a wall switch 20 of a one-side switch that performs ON / OFF operation. The AC power is modulated by the control signal 40 from the panel 30b or the like. The modulated modulated AC power is input to a plurality of LED lighting devices A and 52 and a normal lighting device 56, which are connected to each other through an AC power line. The plurality of LED lighting devices A and 52 demodulate the control signal 60a from the modulated AC power, control the LED elements based on the demodulated control signal 60a, and emit light. Thus, the LED lighting control system 100 can control the plurality of LED lighting devices A and 52 according to the control signal 40.
In addition, the lighting device 56 to which the modulated AC power modulated by the control signal 40 is input does not have a function controlled according to the modulated AC power. I do.

Further, as shown in FIGS. 2 and 4, the LED lighting control system 100 is inputted to the modulation unit 30 via the wall switch 20 of the one-side switch for turning on / off the AC power from the commercial power source 10. The AC power is modulated by the control signal 40 from the operation panel 30b or the like. The modulated modulated AC power is input to a plurality of LED lighting devices B and 55 and a normal lighting device 56 that are connected in parallel through an AC power line. The plurality of LED lighting devices B and 55 demodulate the control signal 60a from the modulated AC power, control the LED elements based on the demodulated control signal 60a, and emit light. Thus, the LED lighting control system 100 can control the plurality of LED lighting devices B and 55 according to the control signal 40.
In addition, the lighting device 56 to which the modulated AC power obtained by modulating the control signal is input does not have a function corresponding to the control signal, and thus performs an operation of emitting light as a normal lighting device 56.

(2. Synthesis unit)
As shown in FIGS. 1 and 2, the modulation unit 30 includes an operation panel 30b that inputs a control signal 40 for controlling the LED elements, and a modulation circuit 30a that modulates AC power using the control signal 40 from the operation panel 30b. Is done.
The modulation circuit 30a modulates alternating current power with the control signal 40, and the modulated modulated alternating current power is transmitted to the LED lighting devices A and 52, the LED lighting devices B and 55, and the lighting device 56 through the alternating current power line. In the modulated AC power, the AC power and the control signal information are modulated and combined.
It should be noted that the present invention can be dealt with by configuring the LED illumination control system 100 by changing the operation panel to an existing dimmer or dimming sensor.

(3. LED lighting device A)
As shown in FIG. 1, the plurality of LED lighting devices A and 52 and the lighting device 56 are connected to an AC power line, and the modulated AC power from the modulation unit 30 is transmitted. As shown in FIG. 3, the LED lighting devices A and 52 include a demodulator circuit 60 that demodulates a control signal 60 a from modulated AC power input from an input terminal 52 a, and an LED element using a control signal 60 a demodulated by the demodulator circuit 60. The lighting circuit 70 that controls 80 and the LED element 80 that is driven by the lighting circuit 70 are configured. Since the modulated AC power can be fed and connected by the plurality of LED lighting devices A and 52 and the feed terminal 52b, it is possible to reduce the man-hour when newly adding or installing the LED lighting devices A and 52. It becomes. In addition, when replacing the lighting device to which the current AC power line is connected, the lighting device can be easily replaced using the current wiring.

The LED circuit 80 is controlled by demodulating the modulated AC power by the demodulating circuit 60 of the LED lighting device, extracting the control signal 60a, and inputting the control signal 60a to the LED driving circuit 70c of the lighting circuit 70.
Accordingly, the modulated AC power obtained by modulating the AC power by the control signal 40 is demodulated and controlled as the control signal 60 a, so that the plurality of LED lighting devices A and 52 can control the LED element 80 according to the control signal 40. .

(4. LED lighting device B)
As shown in FIG. 2, the plurality of LED lighting devices B and 55 and the lighting device 56 are connected in parallel to the AC power line, and the modulated AC power from the modulation unit 30 is transmitted. As shown in FIG. 4, the LED lighting devices B and 55 are provided with a demodulator circuit 60 that demodulates a control signal 60a from modulated AC power input from an input terminal 55a, and an LED element that receives a control signal 60a demodulated by the demodulator circuit 60. The lighting circuit 70 controls 80 and the LED element 80 driven by the lighting circuit 70. Since the plurality of LED lighting devices B and 55 can be connected in parallel to the modulated AC power, it is possible to reduce the man-hours when newly adding or installing the LED lighting devices B and 55. In addition, when replacing a lighting device connected in parallel to the current modulated AC power line, it is possible to easily replace the lighting device using the current wiring.

The LED element 80 can be controlled by demodulating the modulated AC power by the demodulating circuit 60 of the LED lighting device, extracting the control signal 60a, and inputting the control signal 60a to the LED driving circuit 70c of the lighting circuit 70.
Accordingly, the modulated AC power obtained by modulating the AC power using the control signal 40 is demodulated and controlled as the control signal 60 a, so that the plurality of LED lighting devices B and 55 can control the LED element 80 according to the control signal 40. .

(5. Lighting circuit)
The lighting circuit 70 is common to the LED lighting devices A and 52 and the LED lighting devices B and 55, and rectifies the modulated AC power modulated by the control signal 40 into DC power, as shown in FIGS. A rectifier circuit 70a, a power factor correction circuit 70b that suppresses harmonic current components of DC power, and an LED drive circuit 70c that drives the LED element 80 by being controlled by a control signal 60a.
The lighting circuit 70 receives the modulated AC power obtained by modulating the AC power by the control signal 40. The modulated AC power has a portion where the modulated AC power becomes zero output at a predetermined time in the vicinity of the zero cross point by the control signal. However, since only a short time (less than 10% of the period) from the vicinity of the zero cross point is modulated, there are few portions that become zero output, and the lighting circuit 70 converts from alternating current to direct current. Is not affected.

(6. Modulation demodulation method)
In this LED lighting control system 100, two methods of modulation and demodulation in which modulated AC power obtained by modulating AC power with a control signal is transmitted and the control signal is demodulated from the modulated AC power in each LED lighting device will be described in detail with reference to the drawings. explain.

(6-1 Time system)
The first method for modulating and demodulating AC power is to perform modulation that performs zero output that does not output AC power output in the vicinity of the zero cross point for each half-wave of AC power for a time set according to a control signal, and then modulates AC power. In this method, the time of zero output of modulated AC power is measured in the vicinity of the zero cross point for each half wave of power, and the control signal is demodulated from the time of zero output.

(6-2 Example 1)
Specifically, the modulation / demodulation operation of the LED illumination control system 100 when the wall switch 20 is turned ON and the control signal 40 to be dimmed by 50% from the operation panel 30b is input to the modulation circuit 30a. Will be described with reference to FIGS.
FIG. 5A shows an AC power waveform before modulation, which is a SIN waveform at f = 50 Hz (one cycle is 20 ms). 2 shows waveforms input to the modulation circuit 30a shown in FIG.
FIG. 5B shows a modulated AC power waveform after modulation. When dimming at 50%, the AC power is set to zero output for a period of 0.5 ms from the vicinity of the zero cross point for each half wave. Modulate AC power. The waveform after passing through the modulation circuit 30a shown in FIG.
The modulation circuit 30a may be constituted by a circuit, a microcomputer, or a circuit and a microcomputer.

As shown in FIG. 1, the modulated AC power is transmitted to the plurality of LED lighting devices A and 52 and the lighting device 56 through an AC power line feed connection.
FIG. 6A shows a modulated AC power waveform input to the LED lighting devices A and 52, which is modulated based on the control signal 40, and is AC for 0.5 ms from the vicinity of the zero cross point for each half wave. Electric power is zero output.
In the demodulating operation of the modulated modulation AC power, the demodulation circuit 60 shown in FIG. 3 measures the time of zero output of the modulation AC power in the vicinity of the zero cross point for each half wave of the modulation AC power. As shown in FIG. 6B, the modulated AC power is output at zero every 0.05 ms, which is a sampling time sufficiently smaller than the zero output time in the modulated AC power, from the vicinity of the zero cross point for each half wave of the modulated AC power. Determine whether. From the measurement time of 0.5 ms, which is the measured zero output time, it is determined that the control signal 40 that has been modulated by the demodulation circuit 60 is set to 50% dimming. The demodulated control signal 60a instructs the LED driving circuit 70c of the lighting circuit 70 to perform 50% dimming, and the LED driving circuit 70c performs LED dimming according to the 50% dimming control signal 60a of the demodulated control signal 60a. The element 80 is lit by adjusting the brightness to 50%.
The demodulating circuit 60 may be composed of a circuit, a microcomputer, or a circuit and a microcomputer.

In addition, to a normal lighting device 56 that does not have a control function connected by an AC power line, modulated AC power modulated by the control signal 40 is input, but the modulated AC power is modulated every half wave by modulation. There will be a portion where AC power becomes zero output at a predetermined time from the vicinity of the zero cross point. However, since modulation is performed using only a short time in the vicinity of the zero cross point (10% or less of the period), there are few portions that produce zero output, and thus the lighting device 56 is not affected.
Further, in the first embodiment, the initial part near the zero cross point for each half wave is modulated, but the same effect can be obtained by modulating and demodulating the late part near the zero cross point for each half wave. Can do.

By the operation of the LED lighting control system 100, a plurality of LED lighting devices can be controlled with a simple circuit configuration, a conventional wiring can be used, and an ordinary lighting device can be used simultaneously. Can be provided.
In addition, since the modulated AC power modulated by the control signal 40 is checked and controlled every half wave, it is possible to perform control in response to changes in the control signal.

(6-3 Coding method)
The second method for modulating and demodulating AC power is to perform modulation based on the presence or absence of zero output set according to the control signal, and the presence or absence of zero output that is not output in the vicinity of the zero cross point for each half wave of the AC power. In the vicinity of the zero cross point for each half wave, the presence or absence of zero output of the modulated modulation AC power is determined, and the control signal is demodulated from the presence or absence of zero output.

(6.-4 Example 3)
Specifically, the modulation / demodulation operation of the LED illumination control system 100 when the wall switch 20 is turned ON and the control signal 40 for dimming at 70% from the operation panel 30b is input to the modulation circuit 30a. Will be described with reference to FIGS.
FIG. 7A shows an AC power waveform before modulation, which is a SIN waveform at f = 50 Hz (one cycle is 20 ms). 2 shows waveforms input to the modulation circuit 30a shown in FIG.
Fig. 7 (b) shows the modulated AC power waveform. When dimming at 70%, the AC power is modulated according to the presence or absence of zero output for a period of 0.3ms from the vicinity of the zero cross point for each half wave. To do. The control signal 40 is encoded using four half waves of AC power. In the case of a signal with 70% dimming, the dimming signal is modulated to AC power by a 4-bit signal that outputs the zero output with the output three times, and then outputs the non-zero output with no output once. Yes. The waveform after passing through the modulation circuit 30a shown in FIG. In order to identify the dimming signal modulated by the modulated AC power, the dimming signal is encoded at a constant interval so that the zero output is output a set number of times before modulating the dimming signal and then the modulation output is performed. And modulate the AC power.
The modulation circuit 30a may be constituted by a circuit, a microcomputer, or a circuit and a microcomputer.

As shown in FIG. 1, the modulated AC power is transmitted to the plurality of LED lighting devices A and 52 and the lighting device 56 through an AC power line feed connection.
FIG. 8A shows an AC power waveform input to the LED lighting devices A and 52, which is modulated based on the control signal 40. The AC power is 0.3 ms from the vicinity of the zero cross point for each half wave. Is zero output.
As shown in FIG. 3, the demodulating operation of the modulated modulated AC power is performed in the demodulation circuit 60 in the vicinity of the zero cross point for each half wave of the modulated modulated AC power. Measure. As shown in FIG. 8 (b), modulation modulated every 0.05 ms, which is a sampling time sufficiently smaller than the time of modulated zero output, from the vicinity of the zero cross point for every half wave of modulated modulated AC power. Determine whether AC power is zero output. From the measured zero output time of 0.3 ms, it is determined that the control signal 40 that is modulated by the demodulation circuit 60 is set to “1”. As shown in FIG. 7B, the control signal 60a demodulated to 7 from the 4-bit determination signal of “1”, “1”, “1”, “0” is sequentially determined. 70 LED driving circuit 70c is instructed to dimm 70%, and LED driving circuit 70c dims LED element 80 to 70% brightness according to the 70% dimming control signal of demodulated control signal 60a. And turn it on.
The demodulating circuit 60 may be configured by a circuit, a microcomputer, or a circuit and a microcomputer.

In addition, to a normal lighting device 56 that does not have a control function connected by an AC power line, modulated AC power in which AC power is modulated by the control signal 40 is input. In the modulated AC power, there is a portion where the AC power becomes zero output at a predetermined time from the vicinity of the zero cross point every half wave by the dimming signal. However, since modulation is performed using only a short time in the vicinity of the zero cross point (10% or less of the period), there are few portions that produce zero output, and thus the lighting device 56 is not affected.
Further, in the second embodiment, the initial portion near the zero cross point for each half wave is modulated, but the same effect can be obtained by modulating and demodulating the late portion near the zero cross point for each half wave. Can do. In addition, although 1-bit data is modulated in the vicinity of the zero cross point for each half wave, the same effect can be obtained by modulating and demodulating a plurality of bit data by dividing the set time.

By the operation of the LED lighting control system 100, a plurality of LED lighting devices can be controlled with a simple circuit configuration, a conventional wiring can be used, and an ordinary lighting device can be used simultaneously. Can be provided.
Further, since the modulated AC power modulated by the AC power control signal 40 can be confirmed and controlled at regular intervals, it is possible to perform control in response to changes in the control signal.

This time, the case of dimming control has been explained. For example, in the case of LED lighting device such as ON / OFF of LED lighting device, toning control, etc., control for performing dimming control and toning control together, etc. It can be applied and can be widely used to control LED lighting devices.
Further, the present LED illumination control system 100 performs modulation / demodulation in the time from the vicinity of the zero cross point, so that it becomes an LED illumination control system that can be used as it is even when the frequency of the AC power is 50 Hz / 60 Hz, This can be done without having to change the system for each implementation area.

Furthermore, although the LED lighting device of the present embodiment is described as an LED element, the LED element may be an LED lamp composed of a plurality of LED elements, and is not particularly limited thereto. For example, the external appearance may be a ring shape or a U shape, and a plurality of lamps may be connected in parallel. Note that it is possible to cope with the problem by changing the operation panel to an existing dimmer or dimming sensor and configuring an LED illumination control system.

As described above, in the present embodiment, the control unit that modulates AC power based on the control signal and transmits the power, and the LED lighting device are connected by the AC power line or connected in parallel, and are controlled based on the demodulated signal. An LED illumination control system comprising the device is configured.
Thus, an LED illumination control system is proposed in which a plurality of LED illumination devices can be controlled with a simple circuit configuration, conventional wiring can be used, and ordinary illumination devices can be used simultaneously.
In addition, since the modulated AC power modulated by the AC power control signal can be confirmed and controlled at regular intervals, an LED lighting control system capable of promptly responding to changes in the control signal is proposed. Yes.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to these embodiment, Even if there is a design change of the range which does not deviate from the summary of this invention, it is included in this invention. That is, various changes and modifications that can be naturally made by those skilled in the art are also included in the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be widely applied as an LED lighting control system for an LED lighting device that is installed along a ceiling surface of a showroom, a hall, a conference room, an office room, or the like.

10: Commercial power supply 20: Wall switch 30: Modulation unit 30a: Modulation circuit 30b: Operation panel 40: Control signal 52: LED lighting device A
52a: input terminal 52b: feed terminal 55: LED lighting device B
55a: input terminal 56: lighting device 60: demodulation circuit 60a: control signal 70: lighting circuit 70a: rectifier circuit 70b: power factor correction circuit 70c: LED driving circuit 80: LED element 100: LED lighting control system

Claims (3)

LED element control signal input from the outside,
A modulation unit comprising a modulation circuit that modulates AC power using the control signal;
It is composed of at least one LED lighting device to which modulated AC power from the modulation unit is input,
The LED lighting device includes a demodulation circuit that demodulates a control signal from the modulated AC power,
An LED lighting control system, wherein an LED element is controlled according to the control signal by a lighting circuit to which the modulated AC power is input. The LED lighting control system according to claim 1,
The modulation circuit performs modulation to perform zero output that does not output AC power output in the vicinity of the zero cross point of the AC power at a time set according to the control signal,
The LED lighting control system, wherein the demodulation circuit measures a time of zero output near the zero cross point of the modulated AC power and demodulates the control signal from the time of zero output. The LED lighting control system according to claim 1,
The modulation circuit performs modulation according to the presence or absence of zero output that does not output AC power output in the vicinity of the zero cross point of the AC power, with or without zero output set according to the control signal,
The LED lighting control system, wherein the demodulating circuit determines whether or not zero output is present in the vicinity of the zero cross point of the modulated AC power and demodulates the control signal from the presence or absence of zero output.