JP2014063672A - Illuminating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illuminating fixture capable of transmitting a data signal for dimming by PLC and of performing dimming of a light-emitting element, such as an LED, without performing pulse width control.SOLUTION: In an illuminating device 10, a light-emitting current setting part 40 sets a value of a current flowing in a light-emission part 60 on the basis of an extracted data signal, and a drive part 50 controls a constant current from a light-emitting power supply part 22 according to the set value of a current. The light-emission part 60 is dimmed by applying the controlled constant current to the light-emission part 60.

Description

  The present invention relates to a luminaire provided with a light-emitting unit capable of dimming by power line communication (hereinafter referred to as PLC).

  Due to recent improvements in semiconductor technology and control technology, it is common to control the pulse width of electric power. Even in the field of LED lighting that consumes very little power, pulse width control is widely used for dimming LEDs (Patent Document 1).

  In addition, as a method of transmitting a data signal for dimming from a place away from the LED lighting apparatus, a method of outputting infrared rays from a remote controller, or a wireless control based on a wireless standard such as IEEE802.11a or IEEE802.11b There is a method (Patent Document 2).

  However, the method of outputting infrared rays from the remote controller is not suitable for individually controlling a plurality of LED lighting fixtures located in close proximity or controlling a plurality of LED lighting fixtures located away from the remote control. .

  In addition, when a wireless control method based on a wireless standard such as IEEE802.11a or IEEE802.11b is used, radio waves may not reach sufficiently behind a pillar or a metal object.

  From these things, using PLC as a method of transmitting a data signal in order to dim an LED lighting fixture is considered (patent documents 3-5). In this PLC, power and a data signal superimposed on the power line are transmitted. However, when pulse width control is performed for dimming the LED lighting fixture, there is a problem that the noise enters the power line, the noise is included in the data signal, and causes a malfunction. In order to prevent this malfunction, a method of removing noise using a filter can be considered.

Japanese Patent Laying-Open No. 2004-1119078 (FIG. 3) JP 2009-26544 A (FIG. 5) Japanese Patent Laying-Open No. 2004-147063 (FIG. 1, paragraph [0020]) Japanese Patent Laying-Open No. 2008-48205 (FIG. 1) JP2009-141766 (FIG. 1, paragraph [0044])

  However, when such a filter is used, there exists a problem that the lighting fixture using LED becomes large. In particular, in the case where the lighting fixture using LEDs is a type that replaces a conventional straight tube fluorescent lamp, there is a problem that a lighting fixture using LEDs cannot be made large due to its size restriction. Moreover, both 100V and 200V are used as the voltage of commercial power in Japan. As will be described later, it is preferable that the lighting fixture using the LED corresponds to both 100V and 200V.

  The present invention has been made in view of the above problems, and provides a lighting apparatus that transmits a data signal for dimming by a PLC and performs dimming of a light emitting element such as an LED without performing pulse width control. It is another object of the present invention to provide a lighting fixture that can be used at both a first voltage such as 100V and a second voltage such as 200V.

  A lighting device according to the present invention includes a light-emitting unit and is a lighting fixture capable of dimming the light-emitting unit, and includes a power supply unit that receives AC power and a communication unit that extracts a data signal superimposed on the power. And a current setting unit capable of setting a plurality of current values flowing through the light emitting unit based on the extracted data signal, and a drive unit for causing the light emitting unit to emit light according to the set current value. A first DC power source that supplies power for driving the communication unit, the current setting unit, and the driving unit, and power for causing the light emitting unit to emit light through the driving unit. A second DC power supply for supplying the power, and the driving unit controls a constant current from the second DC power supply according to the set current value, and causes the controlled constant current to flow through the light emitting unit. It is possible to dimm the light emitting part A.

  In one embodiment of the present invention, the light emitting unit has a first light emitting element group, a second light emitting element group, and a plurality of switches, and the voltage of the power supplied to the lighting fixture is the first voltage. Detecting the second voltage and outputting a detection signal indicating the result; and when the voltage of the power supplied to the lighting fixture is the first voltage, the detection unit outputs the detection signal according to the detection signal. When the first light emitting element group and the second light emitting element group are connected in parallel by operating a plurality of switches, and the voltage of power supplied to the lighting fixture is the second voltage, the detection The apparatus further includes a switching unit that connects the first light emitting element group and the second light emitting element group in series by operating the plurality of switches according to a signal. In one embodiment of the present invention, the light emitting unit includes a first light emitting element group, a second light emitting element group, and a plurality of switches, and a voltage of power supplied to the lighting fixture is a first voltage. A detection unit that detects whether there is a second voltage and outputs a detection signal indicating the result; and when the voltage of the power supplied to the lighting fixture is the first voltage, the detection unit responds to the detection signal. By operating the plurality of switches, the applied voltage applied to the first light emitting element group and the applied voltage applied to the second light emitting element group are made substantially the same, and the electric power supplied to the lighting fixture When the voltage is the second voltage, by operating the plurality of switches according to the detection signal, the voltage applied to the first light emitting element group is made substantially the same as the applied voltage, and the second The voltage applied to the light emitting element group Further comprising a switching unit for the voltage substantially the same.

In an embodiment of the present invention, a power factor adjustment unit for improving the power factor of the lighting fixture is further provided, and when the first voltage is applied, the power factor becomes θ ₁ and the second voltage is applied. The power factor is θ ₂ , θ ₁ + θ ₂ > θ _n1 + θ _n2 , where θ _n1 is the first voltage when the lighting device does not include the power factor adjuster. There is a power factor when applied, theta _n2, when the luminaire is not provided with the power factor adjustment unit, a power factor when said second voltage is applied.

  In one embodiment of the present invention, the outer shape of the lighting fixture is substantially the same as the straight tube shape of a fluorescent lamp.

  In an embodiment of the present invention, the communication unit is disposed near one base, at least the first DC power source is disposed near the other base, and the communication unit and at least the first DC power source are disposed between the communication unit and the at least first DC power source. A light emitting unit is arranged.

  In an embodiment of the present invention, the light emitting unit is disposed, a semi-cylindrical heat radiating plate extending in a longitudinal direction, and the heat radiating plate are stored, and a cylindrical shape capable of transmitting light through at least a part thereof. And the heat sink has an upper part of the surface on which the light emitting part is disposed and a lower part on the opposite side, a plurality of legs extending from the lower part, and the tips of the legs are inside the cylinder Between the legs, there is a space for the conductive wire electrically connected to the one base to extend toward the other base, and a conductive wire electrically connected to the other base. And a space for extending toward the one base. Further, in an embodiment of the present invention, the light emitting unit is disposed, and a heat radiating plate extending in a longitudinal direction, and at least a part thereof can diffuse and transmit light, and at least a part of the heat radiating plate is disposed. A cover that covers, the heat sink has an upper part of the surface on which the light emitting unit is disposed and a lower part of the opposite surface, and a plurality of legs extend from the lower part, A space for a conductive wire electrically connected to one base to extend toward the other base; a space for a conductive wire electrically connected to the other base to extend toward the one base; have.

  In an embodiment of the present invention, the power supply unit includes a diode bridge circuit for rectifying alternating current and a smoothing circuit for smoothing the diode bridge circuit, and a transformer for converting the alternating voltage. Absent. In an embodiment of the present invention, the second DC power supply does not perform switching control.

  In an embodiment of the present invention, a plurality of LEDs arranged in parallel is defined as one unit, and the light emitting unit includes a plurality of the units arranged in series.

  In another embodiment of the present invention, connecting an electronically controlled device such as a personal computer and a PLC-capable adapter, connecting the adapter to an outlet, and connecting a plurality of lighting fixtures to a power line connected to the outlet; And transmitting a data signal for dimming to the lighting fixture via the electronic control device and the adapter.

  A lighting device according to the present invention includes a light emitting unit, a power supply unit that receives AC power, a communication unit that extracts a data signal superimposed on the power, and a plurality of currents that flow through the light emitting unit based on the extracted data signal. A current setting unit capable of setting a value and a drive unit for causing the light emitting unit to emit light according to the set current value, and the power supply unit is driven by the communication unit, the current setting unit, and the drive unit And a second DC power source for supplying power for the light emitting unit to emit light through the driving unit, and the driving unit supplies a constant current from the second DC power source. The light emitting unit is dimmed by controlling according to the set current value and passing the controlled constant current through the light emitting unit. Since the illuminating device according to the present invention does not perform pulse width control, noise due to switching does not appear on the extracted data signal. For this reason, the lighting device according to the present invention does not require a filter measure for pulse width control.

  In preferable embodiment of this invention, a detection part detects whether the voltage of the electric power supplied to a lighting fixture is a 1st voltage or a 2nd voltage higher than a 1st voltage, and a switching part is a lighting fixture. When the voltage of power supplied to the first voltage is a first voltage, the first light emitting element group and the second light emitting element group are connected in parallel, and the power voltage supplied to the lighting fixture is the second voltage, The first light emitting element group and the second light emitting element group are connected in series. Moreover, in preferable embodiment of this invention, a detection part detects whether the voltage of the electric power supplied to a lighting fixture is a 1st voltage, or a 2nd voltage, and outputs the detection signal which shows the result. When the voltage of the electric power supplied to the lighting fixture is the first voltage, the switching unit operates the plurality of switches according to the detection signal to thereby apply the applied voltage applied to the first light emitting element group and the second voltage. When the applied voltage applied to the light emitting element group is substantially the same and the voltage of the power supplied to the lighting fixture is the second voltage, the first light emitting element is operated by operating a plurality of switches according to the detection signal. The voltage applied to the group is substantially the same as the applied voltage, and the voltage applied to the second light emitting element group is substantially the same as the applied voltage. For this reason, in preferable embodiment of this invention, it is not necessary to make the lighting fixture for 1st voltages, and the lighting fixture for 2nd voltages separately, and can reduce the cost of producing it. In addition, the trader who handles this lighting fixture does not need to have both the first voltage lighting fixture and the second voltage lighting fixture in stock, so the amount of dead stock can be reduced. Further, a manufacturer who installs the lighting fixtures does not make the mistake of attaching the lighting fixture for the first voltage and the lighting fixture for the second voltage by using the lighting fixture of the preferred embodiment of the present invention.

  In preferable embodiment of this invention, a power factor adjustment part improves the power factor of this lighting fixture. For this reason, this lighting fixture can prevent that a power factor worsens even if a 1st voltage is applied or a 2nd voltage is applied.

  In preferable embodiment of this invention, the external shape of this lighting fixture is substantially the same as the straight tube | pipe type external shape of a fluorescent lamp. For this reason, this lighting fixture can be replaced with a conventional fluorescent lamp.

  In a preferred embodiment of the present invention, a communication unit is disposed near one base, at least a first DC power supply unit is disposed near the other base, and a light emitting unit is disposed between the communication unit and the first DC power supply unit. Has been. Since the light emitting unit is disposed between the communication unit and the first DC power supply unit, it is possible to irradiate light efficiently.

  In preferable embodiment of this invention, the heat sink which releases the heat | fever which generate | occur | produces in the light emission part etc. is arrange | positioned. For this reason, heat can be efficiently released. In addition, at the lower part of the heat sink, a space for the conductive wire electrically connected to one base to extend toward the other base and a conductive wire electrically connected to the other base are connected to one base. There is a space to extend toward. For this reason, a conducting wire can be easily arrange | positioned in those spaces. Moreover, when a heat sink is a metal, it can reduce that the noise from the outside enters into those conducting wires. In addition, since the communication unit and the first DC power supply unit are not arranged under the heat radiating plate where the light emitting unit is located, at least a part of the cylindrical tube through which light is diffused and transmitted is sufficiently separated from the light emitting unit. be able to. Thereby, the light from the light emitting part can be efficiently diffused over a wide range. In an embodiment of the present invention, at least a part of the heat radiating plate is covered with a cover. For this reason, the shape of the heat sink of the part which is not covered with a cover can be made arbitrary.

  In a preferred embodiment of the present invention, the second DC power supply does not have a transformer for converting an AC voltage into a low voltage. For this reason, the magnitude | size of this lighting fixture can be made small. In an embodiment of the present invention, the second DC power supply does not perform switching control. Since switching control is not performed, noise due to switching is not included in the extracted data signal.

  In a preferred embodiment of the present invention, one unit includes a plurality of LEDs arranged in parallel. Since each LED has a long lifetime, it rarely opens, but even if one LED of the unit opens, the unit can continue to be lit.

  In another embodiment of the present invention, an electronic control device such as a personal computer transmits a data signal for dimming a plurality of lighting fixtures having individual addresses by means of a PLC. Since this data signal includes address information and dimming information corresponding to the address, and each lighting device has a unique address, another embodiment of the present invention individually separates a plurality of lighting devices. Can be dimmed. In addition, since the plurality of lighting fixtures do not perform dimming by pulse width control, malfunction does not occur due to noise by pulse width control.

It is a block diagram which shows the lighting fixture in one Embodiment of this invention. It is a circuit diagram which shows an example of a light emission current setting part. It is a circuit diagram which shows an example of a light emission current control part. (A) is the figure which looked at the cross section from the top, when the external shape of the lighting fixture in one Embodiment of this invention is substantially the same as the external shape of the straight tube | pipe type of the conventional fluorescent lamp, (b) is the said In this case, the cross section near the middle is viewed from the side. It is a block diagram which shows the lighting fixture in one Embodiment of this invention. It is a circuit diagram which shows an example of a light emission current control part. It is a figure which shows an example of the light emission part of embodiment shown in FIG. It is a figure which shows that multiple lighting fixtures in one Embodiment of this invention are attached to the room.

  Below, the lighting fixture in one Embodiment of this invention is demonstrated, referring drawings.

  FIG. 1 is a block diagram illustrating a lighting fixture 10 according to an embodiment of the present invention. The lighting fixture 10 includes a power supply unit 20, a communication unit 30, a light emission current setting unit 40, a drive unit 50, and a light emitting unit 60.

  The power supply unit 20 receives commercial power and supplies power to the light emitting unit 60, the communication unit 30, the light emission current setting unit 40, and the driving unit 50. For this reason, the power supply unit 20 includes a shared power supply unit 21, a light emission power supply unit 22, and a circuit power supply unit 23. Here, the power supply unit 20 can configure the power supply unit 20 without having a transformer for converting the voltage into a low voltage.

  The shared power supply unit 21 performs full-wave rectification of alternating current using a diode bridge circuit.

  The light-emitting power source unit 22 generates full-wave rectified α-electric power with a constant current circuit or the like, and supplies it to the drive unit 50.

  The circuit power supply unit 23 generates a β voltage having a substantially constant voltage by using a series regulator or a constant current diode, etc., that has been subjected to full-wave rectification, and the communication unit 30, the light emission current setting unit 40, and the drive unit 50. Power is supplied to the communication unit 30, the light emission current setting unit 40, and the drive unit 50. Here, α> β, for example, β may be 5V.

  The communication unit 30 receives the data signal superimposed on the power and extracts it. The communication unit 30 has a unique address. The extracted signal includes an address signal and a data signal for dimming the light emitting unit 60 corresponding to the address signal. When the communication unit 30 determines that the address signal is its own address, the communication unit 30 outputs a data number for dimming the light emitting unit 60 to the light emitting current setting unit 40. In this embodiment, the data signal is a signal having 3 bits of information, but may have information of 4 bits or more. If the number of bits is increased, the light can be adjusted more finely. Further, when the data signal has information of 4 bits or more, the data signal has information for causing a light emitting unit (not shown) different from the light emitting unit 60 to emit light, as will be described later. Also good. The communication unit 30 may have a small transformer for extracting a data signal.

The light emission current setting unit 40 generates a control signal based on the data signal and sends it to the drive unit 50. An example of the relationship between the data signals (CH1, CH2, CH3) and the control signal is shown in Table 1 below. The ratio of the control signal indicates the ratio with respect to the maximum light amount.

  FIG. 2 is a circuit diagram illustrating an example of the light emission current setting unit 40. The data signals (CH1, CH2, CH3) are input to the input terminals (A, B, C) of the decoder U53, decoded, and output from the output terminals (1Y0 to 1Y3, 2Y0 to 2Y3).

  Here, the control signal is not limited to the ratio shown in Table 1. By changing the resistance value of the resistance (R68 to R79) of the light emission current setting unit 40, it can be set to an arbitrary ratio between 0 and 100%.

  Further, when the data signal has information of 4 bits or more, it is possible to set the control signal in detail by using a decoder different from the decoder U53.

  The drive unit 50 includes a light emission current control unit 51 that is a current control circuit. FIG. 3 is a circuit diagram illustrating an example of the light emission current control unit 51.

  The light emission current control unit 51 receives the electric power supplied from the light emission power supply unit 22 from the connection point where the emitter side of the transistor Q54 and the cathode side of the diode D52 are connected via the light emission unit 60. The light emission current control unit 51 receives a signal indicating 0% of the control signal from the light emission current setting unit 40 from the open terminal of the resistor R60, and receives signals indicating other ratios as shown in FIG. The signal is received from the terminal 5 of the operational amplifier U52 through a connection point between R64 and the resistor R65.

  The light emission current control unit 51 controls the amount of current flowing through the light emission unit 60 based on the control signal from the light emission current setting unit 40. Thereby, the light emission current control part 51 can control the light quantity of the light emission part 60 by a constant current. In the present embodiment, since the power supply circuit 20 and the drive unit 50 do not use pulse width control or the like, the communication unit 30 is not easily affected by noise generated from the power supply circuit 20 and the drive unit 50.

  Moreover, the light emission part 60 may have what united several LED in 1 unit, and made what united the said unit in series. The lifetime of the LED is relatively longer than that of the fluorescent lamp, but even if one LED in the unit is opened, the unit can continue to be lit by the above structure. Moreover, the lighting fixture 10 may have a light emitting unit (not shown) different from the light emitting unit 60. For example, the light emitting unit 60 may be configured with a white LED, and another light emitting unit may be configured with a colored LED such as red. In this case, the other light emitting unit can be driven by the same method as driving the light emitting unit 60.

  The outer shape of the lighting fixture 10 may be substantially the same as the straight tube shape of a conventional fluorescent lamp. Since this luminaire has substantially the same dimensions as a straight tube of a conventional fluorescent lamp, it can be replaced with a straight tube of a conventional fluorescent lamp.

  In addition, the straight tube type of a conventional fluorescent lamp is rarely used as one, and usually two or more are used as a set in many cases. Furthermore, there are many cases in which a plurality of the sets gather to illuminate one area. In such a case, when each LED lighting fixture performs light control by pulse width control, the noise becomes a level that cannot be ignored. However, when the luminaire 10 that is substantially the same as the straight tube shape of a conventional fluorescent lamp is used, light control is not performed by the pulse width control, so that it is not affected by noise due to the pulse width control.

  FIG. 4A is a diagram showing a cross-sectional view of the luminaire 10 when the outer shape of the luminaire 10 is substantially the same as the straight tube shape of a conventional fluorescent lamp, and FIG. It is the figure which looked at the cross section of the middle vicinity from the side.

  The lighting fixture 10 shown in FIG. 4 has a light emitting portion 60 disposed therein, a semi-cylindrical heat radiating plate 70 extending in the longitudinal direction, and a heat radiating plate 60, and at least a part of which can transmit light. The cylinder 80 is further provided.

  The heat radiating plate 70 has an upper portion 71 on the surface where the light emitting unit 60 is disposed and a lower portion 72 on the opposite surface. A plurality of legs 73 and 74 extend from the lower portion 72. The tips 75 and 76 of the legs 73 and 74 are extended along the inside of the cylinder 80 so that a portion in contact with the inside of the cylinder 80 becomes large. For this reason, the heat generated in the light emitting unit 60 and the like can be efficiently released to the outside of the tube 80.

  Moreover, when the heat sink 70 is made of a metal such as aluminum, the heat sink 70 may serve as a reflector that reflects light emitted from the light emitting unit 60.

  Between the legs 73 and 74 of the heat radiating plate 70, a space 77 for a lead wire (not shown) electrically connected to one base 91 to extend toward the other base 92, and the other base 92 An electrically connected lead wire (not shown) has a space 78 for extending toward one base 91. The ends 75 and 76 of the legs 73 and 74 extend along the inside of the cylinder 80, but since there is an opening between the ends 75 and 76 of the legs 73 and 74, it is easy from the outside of the heat sink 70. It is possible to arrange the conducting wire in For this reason, compared with the heat sink without an opening part, the working time which arrange | positions the said conducting wire can be shortened. Furthermore, when the heat sink 70 is a metal, it becomes a shield, and it is possible to reduce the entry of noise from the outside into the conducting wire.

  In addition, the communication unit 30 is disposed in the vicinity of one base 91, and at least one of the shared power supply unit 21, the light emitting power supply unit 22, and the circuit power supply unit 23 is disposed in the vicinity of the other base 92. The light emitting unit 60 is positioned between at least one of the shared power source unit 21, the light emitting power source unit 22, and the circuit power source unit 23. In this case, the communication unit 30 receives the data signal superimposed on the electric power from the metal port 91 and from the lead wire connected to the metal port 92, and the shared power supply unit 21 is connected to the metal port 91 from the metal port 92. Receive power from the conductor. Since the light emission part 60 is located not in the end of a straight pipe but in the center part, the lighting fixture 10 shown in FIG. 4 can irradiate light efficiently. In addition, since the communication unit 30 and at least one of the shared power supply unit 21, the light emission power supply unit 22, and the circuit power supply unit 23 are not arranged below the heat sink where the light emission unit 60 is located, at least one A sufficient distance between the light emitting unit 60 and the cylindrical tube 80 through which the part diffuses and transmits light can be obtained. Thereby, the light from the light emitting unit 60 can be efficiently diffused over a wide range.

  In addition, instead of the cylinder 80 described above, at least a part of the heat radiating plate may be covered with a cover (not shown). The heat sink covered with the cover has an upper portion on the surface where the light emitting unit 60 is disposed and a lower portion on the opposite surface. A plurality of legs extend from the lower part, and there is a space between the legs for the lead wire electrically connected to one base 91 to extend toward the other base 92. Furthermore, there is a space for the lead wire electrically connected to the other base 92 to extend toward the one base 91 at the lower part of the heat radiating plate. When the upper part of the heat sink is covered with a cover, the lower part of the heat sink can take any shape.

  FIG. 5 is a block diagram showing the lighting apparatus 100 according to one embodiment of the present invention. The luminaire 100 includes a power supply unit 120, a communication unit 130, a light emission current setting unit 140, a drive unit 150, and a light emitting unit 160. In the present embodiment, the first voltage or the second voltage is allowed to be applied to the lighting fixture 100. Therefore, as will be described later, the light emitting unit 160 includes a first light emitting element unit 161 and a second light emitting element unit 162 shown in FIG.

  The power supply unit 120 receives commercial power and supplies power to the light emitting unit 160, the communication unit 130, the light emission current setting unit 140, and the driving unit 150. For this reason, the power supply unit 120 includes a shared power supply unit 121, a light emission power supply unit 122, and a circuit power supply unit 123. Here, the power supply unit 120 can configure the power supply unit 120 without having a transformer for converting a voltage into a low voltage.

  The shared power supply unit 121 performs full-wave rectification of alternating current using a diode bridge circuit.

When the alternating current is the first voltage, the light-emitting power source unit 122 generates full-wave rectified α ₁ voltage power that is a direct current and supplies it to the drive unit 150 when the alternating current is the first voltage. . Also, when the AC is the second voltage, the light emitting source 122, those which are full-wave rectified, since such a constant current circuit to generate a power of alpha ₂ voltage of substantially constant voltage direct current, the drive unit 150 Supply. Here, the first voltage may be, for example, 100V, 115V, or 120V, and the corresponding second voltage may be 200V, 230V, or 240V. The ratio between the first voltage and the second voltage is not limited to 1: 2, and the first voltage may be 100V and the second voltage may be 150V.

The light-emitting power source unit 122 adjusts the impedance when the first voltage is applied and when the second voltage is applied, thereby improving the power factor of the lighting apparatus 100 by adjusting the impedance. You may have. In this case, when the first voltage is applied, the power factor adjustment unit sets the power factor to θ ₁ according to a signal from the switching unit 153 described later, and when the second voltage is applied, the power factor adjustment unit changes the power factor according to the signal from the switching unit 153. Let the power factor be θ ₂ . When the lighting apparatus 100 does not have the power factor adjustment unit, when the first voltage is applied, the power factor becomes θ _n1 , and when the second voltage is applied, the power factor becomes θ _n2. To do. Here, the relationship between these power factors is θ ₁ > θ _n1 and θ ₂ > θ _n2 .

The circuit power supply unit 123 generates full-wave rectified β-voltage electric power using a series regulator or a constant current diode, and the communication unit 130, the light emission current setting unit 140, and the driving unit 150. Power is supplied to the communication unit 130, the light emission current setting unit 140, and the drive unit 150. Here, when the first voltage <the second voltage and β <α ₁ <α ₂ , for example, when the first voltage is 100V and the second voltage is 200V, α ₁ is approximately 140V and Alternatively, α ₂ may be approximately 280V and β may be 5V.

  The communication unit 130 receives the data signal superimposed on the power and extracts it. In addition, the communication unit 130 has a unique address. The extracted signal includes an address signal and a data signal for dimming the light emitting unit 160 corresponding to the address signal. When the communication unit 130 determines that the address signal is its own address, the communication unit 130 outputs a data number for dimming the light emitting unit 160 to the light emitting current setting unit 140. In this embodiment, the data signal is a signal having 3 bits of information, but may have information of 4 bits or more. If the number of bits is increased, the light can be adjusted more finely. When the data signal has information of 4 bits or more, the data signal is a light emitting element portion (not shown) different from the first light emitting element portion 161 and the second light emitting element portion 162 as will be described later. May have information for causing the light to be emitted. The communication unit 130 may have a small transformer for extracting a data signal.

  The light emission current setting unit 140 generates a control signal based on the data signal and sends it to the drive unit 150. An example of the relationship between the data signals (CH1, CH2, CH3) and the control signal may be as shown in Table 1 above. The light emission current setting unit 140 may have the same configuration as that shown in FIG. Further, the control signal is not limited to the ratio shown in Table 1 above. By changing the resistance value of the resistance (R68 to R79) of the light emission current setting unit 40, it can be set to an arbitrary ratio between 0 and 100%. Further, when the data signal has information of 4 bits or more, it is possible to set the control signal in detail by using a decoder different from the decoder U53.

  The drive unit 150 includes a light emission current control unit 151 that is a current control circuit, a voltage detection unit 152, and a switching unit 153. FIG. 6 is a circuit diagram illustrating an example of the light emission current control unit 151.

  The light emission current control unit 151 supplies the power supplied from the light emission power supply unit 122 via the light emitting unit 160 to the connection point T1 where the emitter side of the transistor Q51 and the cathode side of the diode D51 are connected and the emitter side of the transistor Q54. And the connection point T2 to which the cathode side of the diode D52 is connected, or the connection point T1. The light emission current control unit 151 receives a signal indicating a rate of 0% of the control signal from the light emission current setting unit 140 from an open terminal of the resistor R60, and a signal indicating the other rate is the resistance shown in FIG. The signal is received from the terminal 5 of the operational amplifier U51 and the terminal 5 of the operational amplifier U52 through a connection point between R64 and the resistor R65.

  The light emission current control unit 151 controls the amount of current flowing through the light emission unit 160 based on the control signal from the light emission current setting unit 140. Thereby, the light emission current control part 151 can control the light quantity of the light emission part 160 by a constant current. In this embodiment, since the power supply circuit 120 and the drive unit 150 do not use pulse width control or the like, the communication unit 130 is not easily affected by noise generated from the power supply circuit 120 and the drive unit 150.

The voltage detector 152 detects whether the voltage applied to the lighting fixture 100 is the first voltage or the second voltage. As a detection method, the first voltage and the second voltage may be directly detected. Instead, whether the power voltage supplied from the light emitting power supply unit 122 to the driving unit 150 is the α ₁ voltage or α ₂ may be detected whether the voltage of the, if alpha ₁ voltage is applied to the drive unit 150 judges that the voltage detection unit 152 is a first voltage, alpha ₂ voltage is applied to the drive unit 150 In this case, the voltage detection unit 152 may determine that the voltage is the second voltage.

Further, as a detection method, the second voltage is applied if the voltage of the power supplied from the light emitting power supply unit 122 to the driving unit 150 is higher than V _C2 , and the first voltage is applied if it is lower than V _C1. It may be determined that Here, α ₂ > V _C2 ≧ V _C1 > α ₁ . If V _C2 = V _C1 , the circuit configuration can be simplified as compared with the case where two threshold values are provided, that is, V _C2 and V _C1 .

  The switching unit 153 switches a plurality of switches included in the light emitting unit 160 based on a detection signal from the voltage detection unit 152 indicating whether the first voltage is applied or the second voltage is applied.

  FIG. 7 is a diagram illustrating an example of the light emitting unit 160 of the present embodiment. The light emitting unit 160 includes a first light emitting element unit 161, a second light emitting element unit 162, a first switch 163, a second switch 164, and a third switch 165. The light emitting unit 160 receives power from the light emitting power supply unit 122 via the end L1. In addition, the end L2 is connected to the end T1 of the light emission current control unit 151, and the end L3 is connected to the end T2 of the light emission current control unit 151.

  When the switching unit 153 receives the detection signal indicating that the first voltage is applied to the lighting apparatus 100, the switching unit 153 closes the first switch 163 and the third switch 165 and opens the second switch 164. At this time, the first light emitting element unit 161 and the second light emitting element unit 162 are connected in parallel.

  In addition, when the switching unit 153 receives a detection signal indicating that the second voltage is applied to the lighting apparatus 100, the switching unit 153 opens the first switch 163 and the third switch 165 and closes the second switch 164. At this time, the second light emitting element portion 162 and the first light emitting element portion 161 are connected in series.

When the voltage of the power supplied to the luminaire 100 is the first voltage, the switching unit 153 operates the first to third switches according to the detection signal, and γ ₁ applied to the first light emitting element unit 161. the voltage and gamma ₂ voltage applied to the second light-emitting element portion to be the same. Moreover, when the voltage of the electric power supplied to the lighting fixture 100 is the second voltage, the switching unit 153 operates the first to third switches according to the detection signal, and the first light emitting element unit 161 and the second light emission. the voltage applied across the element to gamma ₃ voltage. In this case, the voltage across the first light emitting element 161 becomes substantially gamma ₁ voltage, the voltage across the second light emitting element 162 is a substantially gamma ₁ voltage.

  In this embodiment, since it is not necessary to make separate lighting fixtures for the first voltage and lighting fixtures for the second voltage, the cost of producing them can be reduced by mass production. In addition, since the vendor handling the lighting fixture of the present embodiment does not need to have both the first voltage lighting fixture and the second voltage lighting fixture in stock, the amount of dead stock can be reduced. it can. Further, a manufacturer who installs the lighting fixtures does not make a mistake of attaching the lighting fixture for the first voltage and the lighting fixture for the second voltage by using the lighting fixture of the present embodiment.

  Moreover, the 1st light emitting element part 161 and the 2nd light emitting element part 162 may respectively have what united several LED in 1 unit, and made the said unit several in series. The lifetime of the LED is relatively longer than that of the fluorescent lamp, but even if one LED of the unit is opened, the unit can be kept lit by the above structure. Moreover, the lighting fixture 100 may have a light emitting element part (not shown) different from the first light emitting element part 161 and the second light emitting element part 162. For example, the 1st light emitting element part 161 and the 2nd light emitting element part 162 may be comprised by white LED, and another light emitting element part may be comprised by colored LED, such as red. In this case, the other light emitting element unit can be driven by the same method as driving the light emitting unit 60 described above.

  The outer shape of the lighting fixture 100 may be substantially the same as the straight tube shape of a conventional fluorescent lamp. For this reason, since this luminaire is substantially the same size as a straight tube of a conventional fluorescent lamp, it can be replaced with a straight tube of a conventional fluorescent lamp.

  When the external shape of the luminaire 100 is substantially the same as the external shape of a straight tube of a conventional fluorescent lamp, the luminaire 100 may have the same configuration as the luminaire 10 shown in FIG. In that case, the lighting fixture 100 has the effect mentioned above.

  Below, an example of the usage method of the lighting fixture in embodiment mentioned above is demonstrated using FIG. FIG. 8 is a diagram illustrating that a plurality of lighting fixtures 201 to 206 in the above-described embodiment are attached to the room 200. The room 200 has a window 210 on one side. The vicinity of the window is sufficiently bright due to sunlight, and it is darker than that in a place far from the window 210. For this reason, for example, by reducing the light amount of the lighting fixture 201 and increasing the light amount of the lighting fixture 206, it is possible to obtain a uniform light amount as a whole of the room 200.

  In step 1, the user connects a personal computer and a PLC-capable adapter, and connects the adapter to an outlet. Here, the power line connected to the outlet is electrically connected to the lighting fixtures 201 to 206. Thereby, the user can send the data signal for adjusting light via the personal computer and the adapter to the lighting fixtures 201-206.

  In step 2, the user determines the initial light amount (output) of the lighting fixtures 201-206. For example, the initial light amount may be set to 55% of the maximum light amount.

  In step 3, the user determines the weights of the lighting fixtures 201-206. Specifically, the weight of the place where the brightness is to be secured is increased. For example, the weight of the lighting fixture 206 may be set to 100%, the weight of the lighting fixture 205 may be set to 85%, and the weight of the lighting fixture 204 may be set to 70%.

  Also, the weighting of places where power can be saved, for example, places where windows or people do not work is reduced. For example, the weight of the lighting fixture 202 may be set to 25%, and the weight of the lighting fixture 201 may be set to 10%.

  In step 4, the user re-adjusts the weighting so that the total power amount does not increase in consideration of the initial light amount and the weighting.

  In this embodiment, since the light quantity of the lighting fixtures 201 to 206 can be adjusted from a personal computer, it is not necessary for the user to perform an operation of turning off the fluorescent lamp switch at the window like a fluorescent lamp. Moreover, it is rare that one switch is connected to one fluorescent lamp, and conventionally, the fluorescent lamp can be controlled only for each fluorescent lamp group connected to the switch. However, in this embodiment, since a unique address is given to each lighting fixture, the light quantity of each lighting fixture can be controlled.

  Further, the personal computer may automatically change the weighting based on the time and date. For example, although the window is bright due to sunlight during daytime, the brightness at the window and at a distance from the window at night is not much different without illumination. For this reason, you may make the weighting of the lighting fixtures 201-206 the same at night. For example, the personal computer may change the weighting of the lighting fixtures 201 to 206 based on information from the optical sensor, or the personal computer has a table of the date and time and the brightness of the window in advance, and illuminates based on the date and time. You may change the weight of the instruments 201-206.

DESCRIPTION OF SYMBOLS 10,100 Lighting fixture 20,120 Power supply part 21,121 Common power supply part 22,122 Light emission power supply part 23,123 Circuit power supply part 30,130 Communication part 40,140 Light emission current setting part 50,150 Drive part 51,151 Light emission current Control unit 152 Voltage detection unit 153 Switching unit 60, 160 Light emitting unit

Claims (11)

A lighting device that includes a light-emitting unit and is capable of dimming the light-emitting unit,
A power supply unit for receiving AC power;
A communication unit for extracting a data signal superimposed on the power;
Based on the extracted data signal, a current setting unit capable of setting a plurality of current values flowing through the light emitting unit,
A drive unit for causing the light emitting unit to emit light according to the set current value,
The power supply unit supplies a first DC power source that supplies power for driving the communication unit, the current setting unit, and the driving unit, and power for the light emitting unit to emit light via the driving unit. A second DC power source
The drive unit can control the constant current from the second DC power source according to the set current value, and can control the light emitting unit by causing the controlled constant current to flow through the light emitting unit. Lighting device. The light emitting unit includes a first light emitting element group, a second light emitting element group, and a plurality of switches,
A detector that detects whether the voltage of the power supplied to the lighting fixture is the first voltage or the second voltage, and outputs a detection signal indicating the result;
When the voltage of the electric power supplied to the lighting fixture is the first voltage, the first light emitting element group and the second light emitting element group are operated by operating the plurality of switches according to the detection signal. When the voltage of power supplied in parallel and supplied to the lighting fixture is the second voltage, the first light emitting element group and the second are operated by operating the plurality of switches according to the detection signal. The lighting fixture according to claim 1, further comprising a switching unit that connects the light emitting element group in series. The light emitting unit includes a first light emitting element group, a second light emitting element group, and a plurality of switches,
A detector that detects whether the voltage of the power supplied to the lighting fixture is the first voltage or the second voltage, and outputs a detection signal indicating the result;
When the voltage of the power supplied to the lighting fixture is the first voltage, the applied voltage applied to the first light emitting element group and the first voltage by operating the plurality of switches according to the detection signal. When the voltage applied to the two light emitting element groups is substantially the same, and the voltage of the power supplied to the lighting fixture is the second voltage, by operating the plurality of switches according to the detection signal And a switching unit that makes the voltage applied to the first light emitting element group substantially the same as the applied voltage and makes the voltage applied to the second light emitting element group substantially the same as the applied voltage. The lighting fixture according to 1. A power factor adjustment unit for improving the power factor of the lighting fixture;
When the first voltage is applied, the power factor is θ ₁ , and when the second voltage is applied, the power factor is θ ₂ ,
θ ₁ > θ _n1 and θ ₂ > θ _n2 ,
Here, θ _n1 is a power factor when the first voltage is applied when the lighting fixture does not include the power factor adjustment unit,
4. The lighting apparatus according to claim ₂ , wherein θ _n2 is a power factor when the second voltage is applied when the lighting apparatus does not include the power factor adjusting unit.   The luminaire according to claim 1, wherein an outer shape of the luminaire is substantially the same as a straight tube shape of a fluorescent lamp.   The communication unit is disposed near one base, at least the first DC power source is disposed near the other base, and the light emitting unit is disposed between the communication unit and the first DC power unit. Item 6. A lighting apparatus according to Item 5. A semi-cylindrical heat sink extending in the longitudinal direction in which the light emitting unit is disposed;
The heat sink is housed, and at least a part thereof includes a cylindrical tube capable of diffusing and transmitting light,
The heat radiating plate has an upper portion of a surface on which the light emitting unit is disposed and a lower portion on the opposite side thereof, a plurality of legs extending from the lower portion, and the tips of the legs are in contact with the inside of the cylinder, Between the legs, a space for the conductive wire electrically connected to the one base to extend toward the other base, and a conductive wire electrically connected to the other base to the one base The lighting fixture according to claim 6, wherein the lighting fixture has a space for extending toward the front.   The power supply unit has a diode bridge circuit for rectifying alternating current, and the second direct current power supply has a constant current circuit, but does not have a transformer for converting the alternating voltage. Item 4. The lighting device according to one of Items 1 to 3.   The lighting device according to claim 1, wherein a plurality of LEDs arranged in parallel is defined as one unit, and the light emitting unit includes a plurality of the units arranged in series.   The lighting device according to claim 1, wherein the second DC power source does not perform switching control. The light emitting unit is disposed, and a heat sink extending in the longitudinal direction;
At least a part of which is capable of diffusing and transmitting light, and a cover that covers at least a part of the heat radiating plate,
The heat radiating plate has an upper portion of a surface on which the light emitting unit is disposed and a lower portion opposite to the surface, and a plurality of legs extend from the lower portion, and the one base and the electric are between the legs. And a space for the lead wire connected to the other base to extend toward the other base, and a space for the lead wire electrically connected to the other base to extend toward the one base. The lighting fixture according to claim 6.