JP2019114555A - Lighting apparatus - Google Patents

Abstract

To provide a lighting apparatus improved to enhance noise resistance.SOLUTION: A lighting apparatus includes a light-emitting device, a lighting device for lighting the light-emitting device, where the lighting device includes a circuit board provided with a lighting circuit, a control terminal array consisting of multiple control terminals provided, in one row, at the rim of the circuit board, and output terminals provided on the circuit board and imparting a power, outputted from the lighting circuit, to the light-emitting device. The control terminal array includes a reference potential terminal, a control power supply terminal and a signal terminal. A control power supply voltage of a magnitude different from that of the output voltage from the output terminal is supplied to the control power supply terminal, a control signal of the lighting circuit is inputted to the signal terminal, and a first terminal located at the end on one side of the control terminal array is the reference potential terminal or the control power supply terminal.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a luminaire.

  Heretofore, as disclosed in, for example, Japanese Patent Application Laid-Open No. 8-330044, a lighting is incorporated in a fluorescent lamp lighting fixture, and has a rectangular outer shape and a terminal block for connection with the outside at its end. The device is known.

JP-A-8-330044

  In recent years, a luminaire equipped with a light emitting diode element (LED element) that is more energy-saving than a fluorescent lamp or the like as a light emitting element has become widespread. Also in the luminaire including the LED element, products having a long outer shape similar to a conventional long so-called straight tube luminaire using a fluorescent lamp are lined up. The inventor of the present application has a need to connect an additional connection unit from the viewpoint of the function expansion of the LED control circuit provided inside the lighting device, and obtains a new idea of providing a control terminal block therefor. The When a control terminal block is added to the end of the circuit board to accept connection with the connection unit, it is preferable to improve the noise resistance of the control terminal block that is responsible for signal transmission and the like.

  The present invention has been made to solve the problems as described above, and it is an object of the present invention to provide a luminaire improved to improve noise resistance.

The lighting apparatus according to the present invention is
A light emitting element,
A lighting device for lighting the light emitting element;
Equipped with
The lighting device is
A circuit board provided with a lighting circuit,
A control terminal row comprising a plurality of control terminals provided in a line around the periphery of the circuit board;
An output terminal provided on the circuit board for supplying the light emitting element with the power output from the lighting circuit;
Equipped with
The control terminal array includes a reference potential terminal, a control power supply terminal, and a signal terminal.
The control power supply terminal is supplied with a control power supply voltage having a magnitude different from that of the output voltage output from the output terminal.
A signal for controlling the lighting circuit is input to the signal terminal,
A first terminal located at one end of the control terminal row is the reference potential terminal or the control power terminal.

  According to the present invention, by arranging the reference potential terminal or the control power supply terminal at one end of the control terminal block, the signal terminal can be protected from noise at the one end, so noise resistance is improved. It has the advantage of being able to

It is a side view showing a lighting device concerning an embodiment of the invention. It is a top view showing a lighting installation concerning an embodiment of the invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a circuit diagram which shows the lighting device concerning embodiment of this invention, and a lighting fixture provided with the same.

  FIG. 1 is a side view showing a lighting device 10 according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. The lighting device 10 is a component having a rectangular outer shape extending in the depth direction in FIG. FIG. 3 is a circuit diagram showing a lighting device 10 according to the embodiment of the present invention and a lighting fixture 1 provided with the lighting device. The luminaire 1 is a straight tube type (note that illustration of the mechanical structure of the LED module 80 and the luminaire 1 is omitted), and the rectangular LED module 80 having an elongated outer shape as in the conventional straight tube fluorescent lamp In the same manner, a rectangular lighting device 10 having an elongated outer shape is provided. A plurality of light emitting diode elements (LED elements) are arranged in one direction in the LED module 80, and the plurality of LED elements are electrically connected in series, in parallel or in series-parallel. As shown in FIG. 1, the lighting device 10 includes a circuit board 20 and an upper cover 11 and a lower cover 14 which sandwich the circuit board 20. As shown in the plan view of FIG. 2, the luminaire 1 includes a circuit board 20 having a rectangular outer shape. The upper cover 11 covers the surface of the circuit board 20 as shown in FIG. 2 and does not cover the end of the circuit board 20. On the other hand, the lower cover 14 has the same length as the circuit board 20.

  The circuit board 20 is provided with various circuits including the step-up chopper circuit 41 and the buck converter circuit 42 described in FIG. 3, that is, these circuits are lighting circuits for lighting the LED module 80. An input terminal block 12 is provided at an end of the surface of the circuit board 20 on the side of one short side 20 c. An output terminal block 22 and a control terminal block 30 are provided side by side at an end on the other short side 20 d side of the surface of the circuit board 20. As shown in the side view of FIG. 1, the output terminal block 22 is provided with a positive output terminal 24 and a negative output terminal 26 aligned in the plane direction of the circuit board 20, and these terminals are connected to the output side of the buck converter circuit 42. doing. The positive electrode output terminal 24 and the negative electrode output terminal 26 are terminals to be connected to the LED module 80. The control terminal block 30 includes a plurality of terminals 31 to 36 arranged in the planar direction of the circuit board 20. The positive electrode output terminal 24, the negative electrode output terminal 26, and the plurality of terminals 31 to 36 are arranged in this order in the plane direction of the circuit board 20.

  The plurality of terminals 31 to 36 have a reference potential terminal 31 connected to the ground, an output terminal 32 for outputting the signal from the LED control circuit 70 to the outside, and a signal from the outside to the LED control circuit 70. Input terminal 33 for input, write terminal 34 for accessing and writing to flash memory in LED control circuit 70, reset terminal 35 connected to LED control circuit 70, and output control power supply voltage VCC And a control power supply terminal 36. As shown in FIG. 1, the reference potential terminal 31 is located at the end of the output terminal block 22 side so as to be adjacent to the negative electrode output terminal 26, and is closest to the negative electrode output terminal 26 among the plurality of terminals 31 to 36. It is arranged. Of the positive electrode output terminal 22 and the negative electrode output terminal 26, the negative electrode output terminal 26 is located on the control terminal block 30 side. The reference potential terminal 31 is disposed at an end of the control terminal block 30 on the side of the output terminal block 22 so as to be adjacent to the negative electrode output terminal 26. Even if the upper cover 11 is not removed, the memory (typically, flash memory) in the LED control circuit 70 can be accessed via the write terminal 34 for writing.

  According to the lighting device 10, safety can be maintained even if the output terminal block 22 and the control terminal block 30 are brought close to achieve miniaturization. That is, different from the present embodiment, the positive electrode output terminal 24 is disposed on the control terminal block 30 side, and a terminal other than the reference potential terminal 31 among the plurality of terminals 31 to 36 is disposed on the output terminal block 22 side. I suppose. In this case, since the high voltage positive electrode output terminal 24 and the terminal such as the output terminal 32 responsible for signal transmission are close to each other, it may be considered that the terminal blocks are separated to some extent to ensure safety and noise resistance. . However, in that case, it is necessary to increase the area of the circuit board 20, which makes it difficult to miniaturize the lighting device. In this point, according to the lighting device 10 according to the present embodiment, the output terminal block 22 and the control terminal block 30 are disposed such that the negative electrode output terminal 26 and the reference potential terminal 31 are adjacent to each other. Even if the terminal blocks 22 and 30 are brought close to each other in a limited space on the substrate 20 to achieve miniaturization, safety and noise resistance can be maintained.

  As shown in the circuit diagram of FIG. 3, the lighting device 10 is connected to the rectifier circuit 52 which is a diode bridge connected to the positive electrode input terminal 12 a and the negative electrode input terminal 12 b via the switch 51, and to the output end of the rectifier circuit 52. A rush current prevention circuit 53, a boost chopper circuit 41, and a buck converter circuit 42 are provided. Lighting device 10 is further formed of a power device and generates switching power supply voltage VCC, step-down circuit 59, MOSFET driver 60 connected to the gates of switching elements 56 and 57, diode D2, capacitor C3, and LED current And a resistor R4 for detecting the The positive electrode input terminal 12a and the negative electrode input terminal 12b are connected to an AC power supply Vac, and a power supply of the LED module 80 is generated from the AC power supply Vac using these circuits.

  The step-up chopper circuit 41 includes an inductor 54 whose one end is connected to the high potential side of the rectifier circuit 52 via the rush current prevention circuit 53, a switching element 56 which is a MOSFET connected to the other end of the inductor 54, and an anode. A diode D1 whose terminal is connected to the connection point between the switching element 56 and the inductor 54; a smoothing capacitor C1 whose positive electrode is connected to the cathode terminal of the diode D1 and whose negative electrode is connected to the low potential side of the rectifier circuit 52; A series circuit of resistors R1 and R3 connected in parallel to the smoothing capacitor C1 and a resistor R2 connected in series to the switching element 56 are provided. The voltage across the smoothing capacitor C1 is divided using the resistors R1 and R3 and input to the LED control circuit 70. The voltage value of the resistor R2 proportional to the current of the switching element 56 is also input to the LED control circuit 70. The LED control circuit 70 inputs a signal for turning on and off the switching element 56 to the MOSFET driver 60 based on these input values. According to the control signal from LED control circuit 70, MOSFET driver 60 applies a drive signal to the gate of switching element 56.

  The buck converter circuit 42 includes a series circuit of a switching element 57 formed of a MOSFET and a diode D3, and this series circuit is connected in parallel to the smoothing capacitor C1 of the step-up chopper circuit 41. The buck converter circuit 42 includes a series circuit of a choke coil L1, a smoothing capacitor C2, and a resistor R4, and this series circuit is connected in parallel to the diode D3. The resistor R4 is for detecting the LED current flowing to the LED module 80. The buck converter circuit 42 is a so-called non-isolated step-down converter. The detection voltage from the resistor R4 for detecting the LED current is input to the LED control circuit 70, and the LED control circuit 70 switches the buck converter circuit 42 so that the current flowing to the LED element becomes a constant current based on the detection voltage. The element 57 is turned on and off.

  The negative output terminal 26 is connected to the ground via the wiring 62 and the current detection resistor R4. The reference potential terminal 31 is connected by being connected to the wiring 62 through the wiring 64. In the present embodiment, the negative electrode output terminal 26 and the reference potential terminal 31 are brought close to each other so that the wires 62 and 64 are as close as possible. The plurality of terminals 31 to 36 included in the control terminal block 30 are electrically connected to the circuits of the lighting device 10 by connecting to the wiring patterns provided on the circuit board 20. That is, the signal transmission with the outside of the lighting device 10 is not performed using an expensive insulating component such as a photo coupler.

  The connection unit 100 is also illustrated in FIG. The connection unit 100 is configured to be connectable to the plurality of terminals 31 to 36 via the control terminal block 30, and can extend the functions of the lighting device 10 and the lighting apparatus 1 including the lighting device 10. As one example, the connection unit 100 can be a human sensor that detects the presence of a human. The internal circuit of the connection unit 100 as a human sensor is connected to the ground through the reference potential terminal 31, receives power supply from the control power supply terminal 36, and the sensor signal is controlled by the LED control circuit 70 through the input terminal 33. Enter in The LED control circuit 70 performs lighting control based on the detection result by the connection unit 100 as a human sensor. However, the present invention is not limited to this, and the connection unit 100 having various functions may be prepared in order to realize various extended functions other than human detection. In such a situation, the functions of the lighting device 10 and the lighting apparatus 1 can be easily expanded.

DESCRIPTION OF SYMBOLS 1 luminaire, 10 lighting devices, 11 upper cover, 12 input terminal block, 12a positive electrode input terminal, 12b negative electrode input terminal, 14 lower cover, 20 circuit boards, 20a, 20b long side, 20c, 20d short side, 22 output terminal Base, 24 positive output terminals, 26 negative output terminals, 30 control terminal blocks, 31 reference potential terminals, 32 output terminals, 33 input terminals, 34 write terminals, 35 reset terminals, 36 control power terminals, 41 boost chopper circuits, 42 Buck converter circuit, 51 switches, 52 rectification circuits, 53 inrush current prevention circuits, 54 inductors, 56, 57 switching elements, 58 switching power supplies, 59 step-down circuits, 60 MOSFET drivers, 62, 64 wires, 70 LED control circuits, 80 LEDs Module, 100 connection unit

Claims (8)

A light emitting element,
A lighting device for lighting the light emitting element;
Equipped with
The lighting device is
A circuit board provided with a lighting circuit,
A control terminal row comprising a plurality of control terminals provided in a line around the periphery of the circuit board;
An output terminal provided on the circuit board for supplying the light emitting element with the power output from the lighting circuit;
Equipped with
The control terminal array includes a reference potential terminal, a control power supply terminal, and a signal terminal.
The control power supply terminal is supplied with a control power supply voltage having a magnitude different from that of the output voltage output from the output terminal.
A signal for controlling the lighting circuit is input to the signal terminal,
The lighting fixture whose first terminal located at one end of the control terminal row is the reference potential terminal or the control power terminal.   The lighting fixture according to claim 1, wherein the first terminal is the control power terminal.   The lighting fixture according to claim 2, wherein a second terminal located at an end of the control terminal row opposite to the first terminal is the reference potential terminal.   The luminaire according to claim 3, wherein the signal terminal is disposed between the first terminal and the second terminal in the control terminal row.   The lighting fixture according to claim 1, wherein the first terminal is the reference potential terminal. The lighting circuit includes a converter circuit that converts an input DC voltage into the output voltage,
The lighting apparatus according to any one of claims 1 to 5, wherein the lighting device includes control power generation means for generating the control power supply voltage from the input DC voltage and applying the control power supply voltage to the control power supply terminal. . The control power generation means
A switching power supply for converting the input DC voltage into the control power supply voltage having a magnitude different from that of the input DC voltage;
A wiring unit that connects the output terminal of the switching power supply to the control power supply terminal;
The lighting fixture according to claim 6, comprising: The circuit board has a long side having a first length and a short side shorter than the first length,
The lighting fixture according to any one of claims 1 to 7, wherein the control terminal row is provided at a portion on the short side of the peripheral edge of the circuit board.

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