JP6315764B2 - LIGHTING DEVICE AND POWERLINE COMMUNICATION SYSTEM FOR TRANSMITTING SIGNALS - Google Patents

Description

  The present invention relates to a lighting device and a power line communication system that transmits a signal thereto.

  2. Description of the Related Art In recent years, an illumination device using a high-intensity LED as a light source for illumination is known. In the illumination device, an LED unit in which a plurality of LEDs are connected in series is connected in parallel, and light control and color adjustment are performed to the plurality of LED driving devices using a plurality of signal dedicated lines such as PWM control. For example, as in Patent Document 1.

JP 2007-189004 A

  In such an illuminating device, an alternating current is supplied through a power line, and a control signal for PWM control is transmitted through a signal line. That is, the lighting device described in Patent Document 1 requires a plurality of power lines and a plurality of signal lines to be wired when light adjustment and color adjustment are performed by a wired operation device, and wiring work is complicated.

  In addition, when multiple lighting devices are installed, the means for the case where it is required to set the dimming and toning of the intended lighting device at the same time at the same time include wired communication, infrared communication, wireless communication and high-speed communication. It is also possible to use power line communication. In the case of infrared rays, it is difficult to synchronize a plurality of units due to the harmful effect of the reach distance. In the case of wireless communication, complicated setting work for preventing interference due to signal spreading to a neighbor or an unintended range is required. Therefore, infrared communication and wireless communication are not easily applied to general lighting equipment. In high-speed power line communication, high-frequency signals other than normal power signals are overlapped on the power lines, so that The equipment to prevent leakage is necessary for the switchboard, which is a major factor. Above all, mounting an expensive transmission / reception circuit in each lighting fixture has been very difficult to commercialize due to the price as a product.

  The present invention has been made in view of such problems, and an illumination device capable of performing dimming toning control while suppressing the influence of noise without requiring complicated wiring, and power line communication for transmitting signals thereto The purpose is to provide a system.

An illumination device disclosed in the present application includes a light source, a drive device that drives and drives the light source, and a control device that controls the drive device, and the control device selects one of the voltage waveforms for a half cycle of an alternating current. a parts lighting device that supplies to the drive unit by missing, the drive device acquires the signal based on the missing not the voltage waveform is continuously more than a predetermined number recognized as the header signal, then one When a signal based on the voltage waveform that is missing is acquired, a signal based on the voltage waveform that is partially missing is recognized as a start signal, or the drive device is partially missing When a signal based on the voltage waveform is acquired continuously for a predetermined number or more, it is recognized as a header signal, and when a signal based on the voltage waveform that is not missing is acquired thereafter, the acquired not missing A signal based on a pressure waveform is recognized as a start signal, and the drive device immediately receives a signal based on a combination of a partially missing voltage waveform and a missing voltage waveform immediately after recognizing the start signal. If the number of times is continuously acquired, it is determined that the dimming instruction signal has been acquired .

An illumination device disclosed in the present application includes a light source, a driving device that drives and drives the light source, and a control device that controls the driving device, and the control device converts an alternating current supplied by a power line into a direct current. A lighting device for supplying power to the driving device, wherein the voltage waveform is connected to the power line, and a part of the voltage waveform corresponding to a half cycle of the alternating current is omitted, and the voltage waveform of the alternating current from the power line. Alternatively, a voltage waveform of the direct current obtained by converting the alternating current is acquired, and the voltage waveform of the direct current corresponding to the voltage waveform corresponding to the half cycle of the alternating current or the voltage waveform corresponding to the half period of the alternating current before conversion is obtained. A voltage means for converting a voltage waveform that is partially missing and a voltage waveform that is not missing into different rectangular waves, and a signal based on the voltage waveform that is not partially missing from the conversion means When a predetermined number or more are acquired continuously, the signal is recognized as a header signal, and after that, when a signal based on the voltage waveform that is partially missing is acquired, a signal based on the voltage waveform that is partially missing is a start signal. Or a signal based on the voltage waveform that is recognized as a header signal when a predetermined number or more of the signals based on the voltage waveform missing from the conversion means are continuously acquired. Is recognized as a start signal, and immediately after recognizing the start signal, a partially missing voltage waveform and a missing voltage waveform When a signal based on the combination of the above is continuously acquired a predetermined number of times, it is determined that a dimming instruction signal has been acquired, and a plurality of modes of dimming values based on a single or plural dimming instruction signals Out selectively determine the mode of one light control values are those comprising a control means for generating a current control signal.

In addition, the lighting device disclosed in the present application is configured to obtain a signal based on a combination of a voltage waveform that is partially missing and a voltage waveform that is not missing following the start signal after obtaining the dimming instruction signal. It is preferable to determine that a dimming instruction signal has been newly acquired when the number of times is continuously acquired .

A power line communication system disclosed in the present application is a power line communication system in which a part of a voltage waveform of an alternating current flowing in a power line is lost and a signal is transmitted together with the supply of the alternating current, and a half cycle of the alternating current flowing in the power line The voltage missing means for missing a part of the voltage waveform of the minute, the voltage waveform of the alternating current obtained from the power line, and the voltage missing a part of the voltage waveform for a half cycle of the alternating current A converting unit that converts a waveform and a voltage waveform that is not missing into different rectangular waves, and continuously obtaining a predetermined number or more of signals based on the voltage waveform that is not partially missing from the converting unit. When a signal based on the voltage waveform that is recognized as a header signal and then partially missing is acquired, a signal based on the voltage waveform that is partially missing is recognized as a start signal. Alternatively, when a predetermined number or more of signals based on the voltage waveform that are partially missing from the conversion means are continuously acquired, the signal is recognized as a header signal, and then a signal based on the voltage waveform that is not missing is acquired. Then, the signal based on the acquired voltage waveform that is not missing is recognized as a start signal, and immediately after the start signal is recognized, a combination of a voltage waveform that is partially missing and a voltage waveform that is not missing When a signal based on the above is continuously acquired a predetermined number of times, it is determined that a dimming instruction signal has been acquired, and one dimming value of a plurality of dimming value modes is determined based on the single or plural dimming instruction signals. Control means for selectively determining the mode and generating a current control signal .

  As effects of the present invention, the following effects can be obtained.

  In the present invention, the dimming instruction signal configured using the voltage waveform is acquired by the drive device via the power line. Further, it is appropriately determined whether or not the light control instruction signal is a formal light control instruction signal according to the mode of obtaining the light control instruction signal. Thereby, it is possible to perform light adjustment and tonal control while suppressing the influence of noise without requiring complicated wiring.

  In the present invention, a signal configured using a voltage waveform is transmitted via a power line. Thereby, a signal can be transmitted to the electrical equipment without requiring complicated wiring.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram of the illuminating device which concerns on 1st embodiment of this invention. The block diagram of the light control apparatus in the illuminating device which concerns on 1st embodiment of this invention. The block diagram of the LED drive device in the illuminating device which concerns on 1st embodiment of this invention. (A) Waveform diagram showing AC voltage applied to dimming control device in lighting device according to first embodiment of the present invention (b) Similarly, waveform diagram showing triac control signal output from triac control unit (c) ) Similarly, a waveform diagram showing an alternating voltage applied from the dimming control device to the illumination device (LED drive device). (D) A waveform diagram showing a dimming instruction signal (rectangular wave) output from the rectangular wave converter. The conceptual diagram which shows the structure of the light control instruction | indication signal in the illuminating device which concerns on 1st embodiment of this invention. The figure which shows the flowchart showing the control aspect of the illuminating device which concerns on 1st embodiment of this invention. (A) Schematic configuration diagram of a lighting device according to a second embodiment of the present invention (b) Schematic configuration diagram of a conventional lighting device. 1 is a schematic configuration diagram of a power line communication system according to the present invention.

  First, the illuminating device 1 which is 1st embodiment of the illuminating device 1 which concerns on this invention using FIGS. 1-3 is demonstrated. In the present embodiment, the lighting device 1 includes a plurality of types of LEDs having different color temperatures. Although the illuminating device 1 is the illuminating device 1 capable of dimming and toning control by dimming control of a plurality of types of LEDs, it is not limited to this.

  As shown in FIG. 1, the illuminating device 1 is the illuminating device 1 which uses LED as a light source. The lighting device 1 includes a dimming control device 2, an LED driving device 8, and an LED module 17. In the illumination device 1, the dimming control device 2 and the LED driving device 8 are connected by a power line Pl.

  As shown in FIG. 2, the dimming control device 2 that is a waveform omission unit generates a dimming instruction signal Sad related to dimming and toning based on an external operation. That is, the dimming control device 2 generates a dimming instruction signal Sad for changing the brightness and color tone of the LED module 17 based on the user's operation. The dimming control device 2 includes an operation unit 3, a zero cross detection unit 4, a triac 5, a triac driver 6, and a triac control unit 7. In the present embodiment, the triac 5 is used to delete a part of the voltage waveform of the alternating current, but the present invention is not limited to this.

  The operation unit 3 receives an input of control content for the lighting device 1 from the outside. The operation unit 3 displays the current setting of the lighting device 1. Specifically, the operation unit 3 is provided with at least an operation unit for turning on and off the lighting device 1 and an operation unit for dimming and toning. The operation unit 3 may be configured by a switch or an adjustment knob, or may be configured by displaying buttons or the like on a touch panel or the like. The operation unit 3 can generate an operation signal Sm based on an external operation. The operation unit 3 can display the current dimming and toning state using a liquid crystal display device or the like.

  The zero cross detection unit 4 detects a time point when the AC voltage becomes 0V. The zero cross detection unit 4 is connected to the power line Pl, and can detect the time point when the voltage of the alternating current flowing through the power line Pl becomes 0V.

  The triac 5 is a three-terminal semiconductor switching element and can flow a current in both directions. Specifically, the triac 5 can conduct the alternating current for an arbitrary time by switching the conduction direction of the current in accordance with the phase of the alternating current. That is, the triac 5 can omit a part of the voltage waveform of the alternating current. The triac 5 has a gate terminal G connected to the triac driver 6. The triac 5 has a T1 terminal connected to the AC power source Acc via the power line Pl, and a T2 terminal connected to the LED driving device 8 via the power line Pl. That is, the triac 5 is provided in series with the power line Pl to which an alternating current is supplied.

  The triac driver 6 generates a trigger pulse and outputs it to the triac 5. The triac driver 6 is connected to the gate terminal G of the triac 5. The triac driver 6 can output a trigger pulse to the gate terminal G of the triac 5 at a predetermined timing based on the triac control signal St from the triac control unit 7.

  The triac control unit 7 determines the conduction time of the triac 5 and controls the triac driver 6. The triac control unit 7 can generate a triac control signal St to be output to the triac driver 6 based on the operation signal Sm regarding the light control and color adjustment from the operation unit 3. The triac control unit 7 is configured to output the generated triac control signal St to the triac driver 6 when the detection signal Sz from the zero cross detection unit 4 is acquired. In other words, the triac control unit 7 converts a part of a voltage waveform corresponding to a half cycle of the AC current immediately after the AC voltage of the AC current becomes 0 V (hereinafter simply referred to as “unit waveform”) at a predetermined ratio. It can be controlled so as to be lost (see FIG. 4).

  The triac control unit 7 is connected to the operation unit 3, and can obtain an operation signal Sm for light adjustment and color adjustment from the operation unit 3. Further, the triac control unit 7 can display the current dimming and toning state on the operation unit 3 based on the operation signal Sm.

  The triac control unit 7 is connected to the zero cross detection unit 4 and can acquire a detection signal Sz when the AC voltage detected by the zero cross detection unit 4 is 0V.

  When the triac control unit 7 is connected to the triac driver 6 and acquires the detection signal Sz from the zero cross detection unit 4, the triac control unit 7 outputs the triac control signal St generated based on the operation signal Sm acquired from the operation unit 3 to the triac driver 6. be able to.

  As shown in FIG. 3, the LED driving device 8 supplies a current I to the LED module 17. The LED driving device 8 includes a DC / DC converter 9, resistors Ra and Rb, and a control circuit 11.

  The resistors Ra and Rb set currents Ia and Ib that flow through the LED units 17a and 17b constituting the LED module 17, respectively. One side of resistance Ra * Rb is connected to LED unit 17a * 17b comprised in parallel, respectively. The other side of the resistors Ra and Rb is grounded via a resistor R0 and connected to the DC / DC converter 9. That is, the currents Ia and Ib flowing through the LED units 17a and 17b can be determined by setting the resistance values of the resistors Ra and Rb to arbitrary values. The resistors R1 and R2 are used to convert the currents Ia and Ib into the voltages Va and Vb.

  The DC / DC converter 9 outputs the current I in a predetermined control manner. The DC / DC converter 9 has a power line Pl connected to an input terminal via a bridge circuit 10. In other words, the DC / DC converter 9 receives a direct current converted from an alternating current by the bridge circuit 10. The DC / DC converter 9 converts the direct current supplied from the input terminal into an arbitrary current value, and can output the current I, which is the direct current after conversion, from the output terminal. Further, the DC / DC converter 9 can control the output current I based on the dimming signal Sc from the control circuit 11. An example of the dimming signal Sc is a PWM dimming signal.

  The DC / DC converter 9 is configured to be able to receive, as a feedback signal Sf, a voltage V that is the sum of the voltage Va and the voltage Vb applied to cause the currents Ia and Ib to flow through the resistors Ra and Rb. The DC / DC converter 9 can maintain the current I output based on the feedback signal Sf at a predetermined value. That is, the DC / DC converter 9 can supply the current I to the LED module 17 by constant current control.

  A control circuit 11 serving as a control unit controls the DC / DC converter 9. The control circuit 11 is composed of, for example, a microcomputer. The control circuit 11 includes a rectangular wave conversion unit 12, a dimming table storage unit 13, a current control signal generation unit 14, a voltage detection unit 15, and a calculation unit 16.

  The rectangular wave conversion unit 12 serving as a conversion unit generates a rectangular wave from the voltage waveform of the alternating current constituting the dimming instruction signal Sad or the voltage waveform of the direct current converted from the alternating current. The rectangular wave converter 12 is connected to the power line Pl on the input side or output side of the bridge circuit 10 and can acquire the voltage waveform of the alternating current or direct current flowing through the power line Pl. In the present embodiment, the rectangular wave converter 12 is connected to the power line Pl on the output side of the bridge circuit 10.

  The rectangular wave conversion unit 12 differs from a unit waveform that is partially missing and a unit waveform that is not missing among the DC waveform corresponding to the unit waveform in the alternating current or the unit waveform in the alternating current before the conversion. It can be converted to a square wave. At this time, the rectangular wave conversion unit 12 determines that the unit waveform is partially missing when the missing ratio of the unit waveform partially missing is equal to or greater than a predetermined ratio. Thereby, the rectangular wave conversion unit 12 can reduce the influence of noise by setting a large loss ratio even in an environment where the influence of noise is large. The rectangular wave conversion unit 12 can output a rectangular wave to the calculation unit 16.

  The dimming table storage unit 13 stores dimming rate information Sa. The dimming table storage unit 13 includes a part of a storage area of a memory (for example, a flash memory or an EEPROM) in the control circuit 11 unit. The dimming table storage unit 13 stores in advance dimming rate information Sa, which is information about the dimming rate and the toning rate of the LED module 17 set for each dimming instruction signal Sad. The dimming table storage unit 13 can output the dimming rate information Sa to the calculation unit 16.

  The current control signal generation unit 14 generates the dimming signal Sc based on the current control signal generation information Sp from the calculation unit 16. The current control signal generation unit 14 can output the generated dimming signal Sc to the DC / DC converter 9. Note that PWM signal generation information is an example of the current control signal generation information Sp.

  The voltage detector 15 detects the voltage V applied to the LED module 17. The voltage detection unit 15 is configured in parallel with the LED module 17 connected to the LED driving device 8. Specifically, the voltage detection unit 15 is connected to the anode side and the cathode side of the LED units 17 a and 17 b in the LED module 17. The voltage detector 15 detects the voltage V applied to the LED module 17 at regular intervals. The voltage detection unit 15 can convert the detected voltage V into a digital signal Vd and output it to the calculation unit 16. The voltage detection unit 15 may be configured to output the digital signal Vd of the detected voltage V to the calculation unit 16 as needed, or to output to the calculation unit 16 in response to a request from the calculation unit 16. The voltage detector 15 may be configured to output an analog signal to the arithmetic unit 16 instead of the digital signal Vd.

  The calculation unit 16 calculates the value of the current I supplied to the LED module 17. The calculation unit 16 can acquire the dimming rate information Sa from the dimming table storage unit 13 based on the rectangular wave from the rectangular wave conversion unit 12. The calculating part 16 can calculate the electric current value supplied to the LED module 17 based on the acquired light control rate information Sa, and can produce | generate the electric current control signal generation information Sp about the electric current value. The current control signal generation information Sp is, for example, a digital signal. Moreover, the calculating part 16 determines the state of the LED module 17. The calculation unit 16 can acquire the digital signal Vd of the voltage V from the voltage detection unit 15 at regular time intervals. The computing unit 16 can make an error determination based on the acquired digital signal Vd.

  The calculation unit 16 is connected to the rectangular wave conversion unit 12 and can obtain the dimming instruction signal Sad converted by the rectangular wave conversion unit 12 into a rectangular wave.

  The calculation unit 16 is connected to the dimming table storage unit 13 and can acquire dimming rate information Sa stored in the dimming table storage unit 13.

  The calculation unit 16 is connected to the current control signal generation unit 14 and can output the current control signal generation information Sp to the current control signal generation unit 14.

  The calculation unit 16 is connected to the voltage detection unit 15 and can acquire the digital signal Vd of the voltage applied to the LED module 17 detected by the voltage detection unit 15.

  The current control signal generation unit 14 is connected to the DC / DC converter 9 and can output the dimming signal Sc to the DC / DC converter 9.

  The LED module 17 is a light source configured by connecting a plurality of LEDs. The LED module 17 is configured by connecting in parallel LED units 17a and 17b in which one or more LEDs are connected in series. In the present embodiment, the LED module 17 is configured such that the color temperature of the LED provided in the LED unit 17a is different from the color temperature of the LED provided in the LED unit 17b.

  For example, in the LED module 17, the color temperature of the LED provided in the LED unit 17 a is 5000 Kelvin, and the color temperature of the LED provided in the LED unit 17 b is 2500 Kelvin. Thereby, the LED module 17 can change the color tone of the whole LED module 17 by adjusting the light emission luminance of the LED unit 17a and the light emission luminance of the LED unit 17b independently of each other (toning control). The LED module 17 can be dimmed by adjusting the light emission luminance of the LED units 17a and 17b while keeping the color tone of the entire LED module 17 constant. Note that it is not essential that the toning control is possible, and only the dimming control can be performed by providing the LED units 17a and 17b with LEDs having the same color temperature.

  In the LED module 17, the LED units 17 a and 17 b may be mounted on the same substrate, or may be mounted on different substrates. Moreover, in this embodiment, although the LED module 17 is comprised from LED unit 17a and LED unit 17b, it is not limited to this, What is necessary is just to be comprised from one or more LED units.

  The LED module 17 is connected to the LED driving device 8. Specifically, the anode side terminals of the LED units 17 a and 17 b constituting the LED module 17 are connected to the output terminal of the DC / DC converter 9. Further, the cathode side terminals of the LED units 17a and 17b are connected to the resistors Ra and Rb, respectively. Thus, in the LED module 17, the currents Ia and Ib flowing through the LED units 17a and 17b are determined based on the resistance values of the resistors Ra and Rb.

  Below, the control mode of the light control device 2 of the illuminating device 1 and the LED drive device 8 which concern on 1st embodiment of this invention is demonstrated using FIGS. 1-3.

  In the dimming control device 2 of the lighting device 1, the triac control unit 7 generates the triac control signal St based on the operation signal Sm from the operation unit 3. Based on the triac control signal St, the dimming control device 2 includes a dimming instruction composed of a combination of a unit waveform in which a portion of the unit waveform of the alternating current is missing by the triac 5 and a unit waveform that is not missing. A signal Sad is generated.

  The LED drive device 8 of the illumination device 1 acquires the dimming instruction signal Sad generated by the dimming control device 2 from the power line Pl by the rectangular wave conversion unit 12 of the control circuit 11 and converts it into a rectangular wave. The LED drive device 8 acquires the dimming instruction signal Sad converted into the rectangular wave in the calculation unit 16. The calculation unit 16 acquires the dimming rate information Sa from the dimming table storage unit 13 based on the acquired dimming instruction signal Sad. The calculation unit 16 generates current control signal generation information Sp and transmits it to the current control signal generation unit 14.

  The current control signal generation unit 14 generates the dimming signal Sc based on the acquired current control signal generation information Sp. The current control signal generation unit 14 transmits the generated dimming signal Sc to the DC / DC converter 9. The DC / DC converter 9 supplies the current I to the LED module 17 based on the received dimming signal Sc.

  The LED module 17 is supplied with the current I supplied from the DC / DC converter 9. The current I is shunted to the currents Ia and Ib at a shunt ratio determined by the resistance values of the resistors Ra and Rb. Currents Ia and Ib flow in the LED units 17a and 17b of the LED module 17, respectively. In the LED units 17a and 17b, when the currents Ia and Ib are supplied, the respective LEDs are lit with a luminance corresponding to the current Ia or the current Ib.

  The DC / DC converter 9 acquires, as a feedback signal Sf, a voltage V that is the sum of the voltage Va and the voltage Vb applied to cause the currents Ia and Ib to flow through the resistors Ra and Rb. The DC / DC converter 9 controls the current I output based on the acquired feedback signal Sf to a constant current value.

  Here, the dimming instruction signal Sad generated by the dimming control device 2 will be specifically described with reference to FIG. FIG. 4A shows an AC voltage applied to the dimming control device 2. FIG. 4B shows a triac control signal St output from the triac control unit 7. FIG. 4C shows an AC voltage applied from the dimming control device 2 to the lighting device 1 (LED driving device 8). FIG. 4D is a dimming instruction signal Sad (rectangular wave) output from the rectangular wave converter 12.

  The dimming instruction signal Sad is composed of a plurality of unit waveforms. Specifically, the dimming instruction signal Sad is configured by a combination of a unit waveform in which some of the unit waveforms are missing and a unit waveform that is not missing. That is, the dimming instruction signal Sad is generated using an AC voltage (see FIG. 4A), and is output to the LED driving device 8 of the lighting device 1 together with the AC current via the power line Pl. In the present embodiment, the dimming instruction signal Sad is composed of a set of five unit waveforms. However, the present invention is not limited to this.

  The unit waveform from which a part is missing is a first half of the phase of the waveform by the triac 5 based on the triac control signal St (see FIG. 4B) based on the time when the AC voltage is 0V (zero cross point). Part is missing and generated (see FIG. 4C). As a result, the dimming instruction signal Sad can reduce the influence of noise by setting a reference for starting omission even in an environment where the influence of noise is large. In the present embodiment, the unit waveform in which a part is missing is partly omitted in the first half with respect to the time point when the AC voltage is 0 V (zero cross point), but is not limited thereto. A configuration in which a part of the latter half is omitted with respect to a time point when the AC voltage is 0V may be used.

  For the dimming instruction signal Sad, a unit waveform from which a part is omitted is used. That is, the dimming instruction signal Sad is a predetermined number (for example, “5” in the present embodiment) from the unit waveform, with the unit waveform from which a part is omitted being used as the start signal Ss for starting the dimming instruction signal Sad. “)” Is generated by continuous unit waveforms. In the present embodiment, the dimming instruction signal Sad is composed of a set of five unit waveforms continuous from the start signal Ss, but the present invention is not limited to this.

  The dimming instruction signal Sad is output continuously a predetermined number of times (in this embodiment, for example, “twice”). That is, the dimming instruction signal Sad is continuously output by a predetermined number of combinations of the start signal Ss and the dimming instruction signal Sad. In the present embodiment, the combination of the start signal Ss and the dimming instruction signal Sad is continuously output twice, but the present invention is not limited to this.

  Next, the processing mode of the dimming instruction signal Sad in the LED driving device 8 will be specifically described with reference to FIGS. 3 to 5.

  As shown in FIG. 3, the LED driving device 8 acquires a unit waveform from the power line Pl, and converts the unit waveform partially missing and the unit waveform not missing in the rectangular wave conversion unit 12 into different rectangular waves. To do. Specifically, as shown in FIG. 4D, the LED drive device 8 lacks the excitation time (pulse width) A of the rectangular wave (pulse) with respect to the unit waveform that is partially missing in the rectangular wave converter 12. A rectangular wave is generated so as to be longer than the excitation time B of the rectangular wave for the unit waveform that has not been performed. The LED driving device 8 outputs the rectangular wave generated by the rectangular wave conversion unit 12 to the calculation unit 16.

  The LED driving device 8 acquires the rectangular wave generated by the rectangular wave converting unit 12 in the calculating unit 16. The LED driving device 8 recognizes the acquired rectangular wave as a 1-bit signal that is the minimum unit of information. Specifically, the LED drive device 8 recognizes, in the calculation unit 16, a rectangular wave having a long excitation time as “1” and a rectangular wave having a short excitation time as “0”. That is, the dimming instruction signal Sad is configured as a data code including a predetermined number of combinations of “1” and “0”. In the present embodiment, the dimming instruction signal Sad is configured as a 5-bit data code, but is not limited thereto.

  As shown in FIG. 5, the LED driving device 8 is configured to obtain “1” after the calculation unit 16 continuously acquires “0” equal to or greater than a predetermined number (for example, “5” in the present embodiment). When acquired, it is recognized as the start signal Ss of the dimming instruction signal Sad, and a predetermined number of bits acquired immediately thereafter (for example, “5 bits” in the present embodiment) are used as the dimming instruction signal Sad. Recognize that it is composed.

  Further, in the LED driving device 8, the calculation unit 16 continuously applies the dimming instruction signal Sad composed of the same combination of “1” and “0” a predetermined number of times (in this embodiment, for example, “twice”). Then, it is determined that the dimming instruction signal Sad has been acquired. Specifically, the LED driving device 8 has “1” which is a predetermined number (“5” in the present embodiment, for example) following the “1” which is the start signal Ss by the calculation unit 16. A combination with “0” is acquired. Further, the LED driving device 8 is the same as the one obtained by the arithmetic unit 16 immediately after that, the combination of the predetermined number “1” and “0” acquired immediately after the start signal Ss “1”. If it is, it is determined that the dimming instruction signal Sad has been acquired.

  For example, in the example illustrated in FIG. 5, the LED driving device 8 determines “1” after the arithmetic unit 16 acquires “0” of 5 bits as the start signal Ss. Then, the LED drive device 8 has a 5-bit value (data code) “01110” following the “1” that is the start signal Ss by the arithmetic unit 16, “1” that is the next start signal Ss, and a 5-bit value (data Code) “01110” is continuously arranged, and when the first 5-bit data code and the next 5-bit data code match, it is determined that the dimming instruction signal Sad1 “01110” has been acquired. In the present embodiment, the LED driving device 8 determines that the dimming instruction signal Sad has been acquired when the same combination of 5-bit signals is acquired twice in succession, but is not limited thereto.

  The LED driving device 8 is different from the combination of “1” and “0” constituting the previously obtained dimming instruction signal Sad after the arithmetic unit 16 continuously obtains the dimming instruction signal Sad a predetermined number of times. When the dimming instruction signal Sad composed of the combination of “1” and “0” is acquired, it is determined that the dimming instruction signal Sad is newly acquired. Specifically, the LED drive device 8 is different from the dimming instruction signal Sad1 after the start signal Ss after the arithmetic unit 16 obtains the dimming instruction signal Sad1 twice in succession, “1” and “0”. If the dimming instruction signal Sad2 comprising the combination of is acquired twice consecutively, it is determined that the dimming instruction signal Sad1 and the dimming instruction signal Sad2 have been acquired.

  Next, the control mode of the lighting device 1 will be described in detail with reference to FIG.

  As shown in FIG. 3, in step S <b> 110, the triac control unit 7 of the dimming control device 2 in the lighting device 1 determines whether or not the operation signal Sm has been acquired from the operation unit 3 of the dimming control device 2. As a result, when it is determined that the operation signal Sm is acquired from the operation unit 3, the triac control unit 7 shifts the step to step S120. On the other hand, when determining that the operation signal Sm is not acquired from the operation unit 3, the triac control unit 7 shifts the step to step S140.

  In step S120, the triac control unit 7 of the dimming control device 2 generates a triac control signal St based on the acquired operation signal Sm, and shifts the step to step S130.

  In step S130, the triac control unit 7 of the dimming control device 2 deletes a part of a predetermined unit waveform by the triac 5 via the triac driver 6 based on the generated triac control signal St. Sad is generated, and the process proceeds to step S140.

  In step S140, the rectangular wave conversion unit 12 of the LED driving device 8 in the illumination device 1 acquires a unit waveform including the dimming instruction signal Sad generated by the dimming control device 2 through the power line Pl, and performs the dimming instruction. The unit waveform including the signal Sad is converted into a rectangular wave, and the step proceeds to step S150.

  In step S150, the calculation unit 16 of the LED driving device 8 obtains a rectangular wave including the converted dimming instruction signal Sad, and the rectangular wave (pulse) is converted into a minimum unit of information based on the excitation time (pulse width). A certain 1-bit signal “1” or “0” is converted, and the process proceeds to step S160.

  In step S160, the calculation unit 16 of the LED driving device 8 determines whether or not the number of signals based on the acquired rectangular wave is “0” continuously for a predetermined number (for example, “5” in the present embodiment). judge. As a result, when it is determined that the signal based on the rectangular wave obtained from the rectangular wave conversion unit 12 is “0” continuously for a predetermined number or more, the arithmetic unit 16 converts the signal of “0” continuous for the predetermined number or more to the header signal. And the process proceeds to step S170. On the other hand, when it is determined that a predetermined number or more of the signals based on the rectangular wave obtained from the rectangular wave conversion unit 12 are not “0”, the calculation unit 16 shifts the step to step S110.

  The header signal is “5 bits” in the present embodiment, but is not limited to this, and may be at least the number of bits of the dimming instruction signal Sad. As the number of bits of the header signal increases, the detection error decreases, so the possibility of malfunction of the LED driving device 8 is reduced. However, since the time for the calculation unit 16 of the LED driving device 8 to read the header signal data becomes longer, it is desirable to set the approximate value equal to or more than the number of bits of the dimming instruction signal Sad. Further, the header signal is composed of a predetermined number or more of continuous “0” in the present embodiment, but is not limited thereto, and may be composed of a predetermined number or more of “1”. The header signal can be distinguished from the start signal Ss by making it at least different from the value of the start signal Ss. Therefore, when the header signal is composed of a predetermined number of consecutive “1” s, the start signal Ss is set to “0”.

  In step S170, the calculation unit 16 of the LED drive device 8 determines whether or not the same dimming instruction signal Sad as the acquired dimming instruction signal Sad has been continuously acquired. As a result, when it is determined that the same dimming instruction signal Sad as the dimming instruction signal Sad acquired from the rectangular wave converter 12 has been continuously acquired, the arithmetic unit 16 shifts the step to step S180. On the other hand, when it is determined that the same dimming instruction signal Sad as the dimming instruction signal Sad acquired from the rectangular wave converter 12 is not continuously acquired, the arithmetic unit 16 shifts the step to step S110.

  In step S180, the calculation unit 16 of the LED drive device 8 acquires the dimming rate information Sa from the dimming table storage unit 13 based on the dimming instruction signal Sad, and the process proceeds to step S190.

  In step S190, the calculation unit 16 of the LED drive device 8 calculates a current value to be supplied to the LED module 17 from the acquired dimming rate information Sa, and generates current control signal generation information Sp for the current value. To step S200.

  In step S200, the calculation unit 16 of the LED drive device 8 transmits the generated current control signal generation information Sp to the current control signal generation unit 14, and returns the step to step S110.

  With this configuration, in the lighting device 1 according to the embodiment, the light control instruction signal Sad generated in the light control device 2 is acquired by the calculation unit 16 of the LED drive device 8 via the power line Pl. Can do. Furthermore, the illuminating device 1 can determine appropriately whether the signal based on the unit waveform acquired via the power line Pl is the light control instruction signal Sad.

  Next, the illuminating device 18 which is 2nd embodiment of the illuminating device which concerns on this invention is demonstrated using FIG. In the following embodiments, the same points as those of the above-described embodiments will not be specifically described, and different portions will be mainly described.

  As shown to Fig.7 (a), the illuminating device 18 which is 2nd embodiment of the illuminating device which concerns on this invention is comprised so that several LED drive device may be controlled by the single dimming control apparatus 2. As shown in FIG. Has been. The illumination device 18 includes a dimming control device 2, a first LED driving device 8X, a second LED driving device 8Y, a first LED module 17X, and a second LED module 17Y. In the present embodiment, the lighting device 18 has two LED modules controlled by the dimming control device 2, but is not limited thereto.

  The lighting device 18 has the dimming control device 2 connected to an AC power source Acc. And the illuminating device 18 is connected to the light modulation control apparatus 2 via the power line Pl in order of the 1st LED drive device 8X and the 1st LED module 17X. Furthermore, the illumination device 18 is connected to the first LED driving device 8X via the power line Pl in the order of the second LED driving device 8Y and the second LED module 17Y. That is, in the lighting device 18, the first LED driving device 8 </ b> X and the second LED driving device 8 </ b> Y are connected to the dimming control device 2 in series via the power line Pl.

  In the lighting device 18, an alternating current from the alternating current power source Acc is supplied to the first LED driving device 8 </ b> X next to the dimming control device 2 through the power line Pl. Further, in the lighting device 18, not only the alternating current is supplied from the first LED driving device 8X to the first LED module 17X, but also the second LED module 17Y from the first LED driving device 8X via the second LED driving device 8Y. Has been supplied to. In the lighting device 18, the dimming instruction signal Sad from the dimming control device 2 is output to the first LED driving device 8X and the second LED driving device 8Y via the power line Pl. For this reason, the illuminating device 18 uses the signal line S1, as in the conventional illuminating device 100, to send the dimming instruction signal Sad from the dimming control device 2 to the first LED driving device 8X and the second LED driving device 8Y. (See FIG. 7B). That is, the illuminating device 18 can control a plurality of LED driving devices only by the power line Pl by the single dimming control device 2.

  Next, the power line communication system 19 which is one embodiment of the power line communication system according to the present invention will be described with reference to FIG. In the following embodiments, the same points as those of the above-described embodiments will not be specifically described, and different portions will be mainly described.

  The power line communication system 19 transmits a signal using an alternating current flowing through the power line Pl. The power line communication system 19 is configured by connecting a signal generation device 20 and a rectangular wave conversion device 21 to a power line Pl through a power line Pl.

  The signal generation device 20 which is a waveform omission unit generates a control signal by omission of a part of the voltage waveform of the alternating current based on an external operation. The signal generation device 20 includes a zero-cross detection unit 4, a triac 5, a triac driver 6, and a triac control unit 7 (see FIG. 2). In the present embodiment, the triac 5 is used to delete a part of the voltage waveform of the alternating current, but the present invention is not limited to this. In the signal generation device 20, the triac 5 is provided in series with the power line Pl.

  The rectangular wave conversion device 21 that is a conversion unit generates a rectangular wave from the voltage waveform of the alternating current. The rectangular wave converter 21 can acquire the voltage waveform of the alternating current flowing through the power line Pl. The rectangular wave conversion device 21 has a rectangular waveform in which a unit waveform in which a part of a voltage waveform of a direct current corresponding to a unit waveform in an alternating current or a unit waveform in an alternating current before conversion is missing is omitted. Can be converted into waves.

  In the power line communication system 19 configured as described above, the operation device 23 of the electrical device 22 is connected to the signal generation device 20, and the rectangular wave conversion device 21 is connected to the electrical device 22. The power line communication system 19 generates a control signal by deleting a part of the voltage waveform of the alternating current based on the operation signal Sm from the operation device 23. Then, the power line communication system 19 supplies an alternating current to the electrical equipment 22 via the power line Pl and transmits the alternating current including a control signal. The power line communication system 19 converts a control signal formed from a voltage waveform into a rectangular wave by the rectangular wave conversion device 21 and outputs it to the electrical equipment 22.

  By configuring in this way, the power line communication system 19 according to an embodiment converts the control signal input from the connected controller 23 into a signal configured using a voltage waveform, and sets the power line Pl Sent through. Thereby, a signal can be transmitted to the electrical equipment 22 without requiring complicated wiring.

DESCRIPTION OF SYMBOLS 1 Illuminating device 8 LED drive device 18 Power line communication system Sad Dimming instruction signal Pl Power line

Claims (4)

A light source, a drive device that drives the light source to light, and a control device that controls the drive device,
Wherein the controller of the half period of the voltage waveform of the alternating current, a lighting device that supplies to the drive unit by missing a part,
When the driving device acquires a signal based on the voltage waveform that is not missing continuously when a predetermined number or more is acquired, it recognizes it as a header signal, and then acquires a signal based on the voltage waveform that is partially missing, Recognizing a signal based on the voltage waveform that is partially missing as a start signal,
Alternatively, when the drive device continuously acquires a predetermined number or more of signals based on the voltage waveform that is partially missing as a header signal, and then acquires a signal based on the voltage waveform that is not missing. , Recognizing a signal based on the acquired voltage waveform not missing as a start signal,
Immediately after recognizing the start signal, the drive device continuously obtains a signal based on a combination of a voltage waveform that is partially missing and a voltage waveform that is not missing a predetermined number of times. Judge that it was acquired,
Lighting device. A light source, a drive device that drives the light source to light, and a control device that controls the drive device,
The control device is an illumination device that converts an alternating current supplied by a power line into a direct current and supplies the direct current to the driving device,
Waveform missing means connected to the power line and missing a part of the voltage waveform for a half cycle of the alternating current;
Acquires the voltage waveform of the alternating current from the power line or the voltage waveform of the direct current obtained by converting the alternating current, and corresponds to the voltage waveform corresponding to a half cycle of the alternating current or a voltage waveform corresponding to a half cycle of the alternating current before conversion. A converting means for converting a voltage waveform that is partially missing and a voltage waveform that is not missing out of the voltage waveform of the direct current into different rectangular waves;
When a signal based on the voltage waveform that is not partially missing from the conversion means is acquired continuously as a predetermined number or more, it is recognized as a header signal, and then a signal based on the voltage waveform that is partially missing is acquired. When a signal based on the voltage waveform that is partially missing is recognized as a start signal, or a signal based on the voltage waveform that is partially missing is continuously acquired from the converting means. Recognizing as a header signal and then acquiring a signal based on the voltage waveform that is not missing, immediately after recognizing the acquired signal based on the voltage waveform that is not missing as a start signal, When a signal based on a combination of a voltage waveform that is partially missing and a voltage waveform that is not missing is continuously acquired a predetermined number of times, it is determined that a dimming instruction signal has been acquired, Based on the German or the light control direction signal to selectively determine the mode of one light control values of the aspect of the plurality of dimming values comprises control means for generating a current control signal, and
Lighting device. After acquiring the dimming instruction signal, if a signal based on a combination of a voltage waveform that is partially missing and a voltage waveform that is not missing following the start signal is continuously acquired a predetermined number of times, a new dimming is performed. It is determined that the light instruction signal has been acquired.
The lighting device according to claim 1 or 2. A power line communication system in which a part of the voltage waveform of the alternating current flowing in the power line is deleted and a signal is transmitted together with the supply of the alternating current,
Waveform missing means for missing a part of the voltage waveform for a half cycle of the alternating current flowing through the power line;
A voltage waveform of an alternating current is acquired from the power line, and a voltage waveform that is partially missing and a voltage waveform that is not missing are converted into different rectangular waves from the voltage waveform corresponding to a half cycle of the alternating current. Conversion means,
When a signal based on the voltage waveform that is not partially missing from the conversion means is acquired continuously as a predetermined number or more, it is recognized as a header signal, and then a signal based on the voltage waveform that is partially missing is acquired. When a signal based on the voltage waveform that is partially missing is recognized as a start signal, or a signal based on the voltage waveform that is partially missing is continuously acquired from the converting means. Recognizing as a header signal, and then acquiring a signal based on the voltage waveform that is not missing, immediately after recognizing the acquired signal based on the voltage waveform that is not missing as a start signal, When a signal based on a combination of a voltage waveform that is partially missing and a voltage waveform that is not missing is continuously acquired a predetermined number of times, it is determined that a dimming instruction signal has been acquired, Based on the German or the light control direction signal to selectively determine the mode of one light control values of the aspect of the plurality of dimming values, and a control means for generating a current control signal,
Power line communication system.

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