JP6221791B2 - Lighting device and lighting apparatus - Google Patents

Description

  The present invention relates to a lighting device and a lighting fixture.

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

JP-A-8-330044

  In recent years, lighting fixtures in which light-emitting diode elements (LED elements) that are more energy-saving than fluorescent lamps are mounted as light-emitting elements have become widespread. Also in the lighting fixture provided with an LED element, the product which has the same long external shape as the conventional long so-called straight tube type lighting fixture using a fluorescent lamp is lined up. The inventor of the present application has a need to connect an additional connection unit from the viewpoint of expanding the function of the LED control circuit provided in the lighting device, and has obtained a new idea of providing a control terminal block therefor. It was. It is conceivable that the control terminal block is provided for a lighting device having a rectangular outer shape and a lighting device having the rectangular outer shape. However, a conventional general lighting device for straight tube illumination usually has a terminal block at the end as described in the background art. When a control terminal block is added to a lighting device having a rectangular outer shape, a wiring pattern must be added to the circuit board accordingly. Since there is only a limited space on the circuit board, especially the circuit board with a rectangular outer shape has restrictions on the space near the end where the terminal block is placed, when you try to add a control terminal block, the pattern on the circuit board There has been a problem that layout design becomes difficult.

  The present invention has been made to solve the above-described problems, and can suppress the difficulty in designing a pattern layout on a circuit board in a limited space on a circuit board having a rectangular outer shape. It aims at providing a lighting device and a lighting fixture.

  A lighting device according to the present invention includes a circuit board having a rectangular outer shape provided with a lighting circuit, an output terminal block provided at an end on a short side of the surface of the circuit board, and the surface of the circuit board. A control terminal block provided next to the output terminal block, and the output terminal block includes a positive electrode output terminal and a negative electrode output terminal connected to the output side of the lighting circuit and arranged in a plane direction of the circuit board. The control terminal block includes a plurality of terminals arranged in a planar direction of the circuit board, and the plurality of terminals include a reference potential terminal located at an end opposite to the output terminal block.

  A lighting fixture according to the present invention includes a light emitting module and a lighting device, and the lighting device has a rectangular circuit board provided with a lighting circuit, and an end on the short side of the surface of the circuit board. And an output terminal block provided next to the output terminal block on the surface of the circuit board, and the output terminal block is connected to an output side of the lighting circuit, and A positive output terminal and a negative output terminal arranged in the plane direction of the circuit board, the control terminal block includes a plurality of terminals arranged in the plane direction of the circuit board, and the plurality of terminals are the output terminal block A reference potential terminal located at the opposite end is included.

  According to the present invention, in a limited space on a long circuit board suitable for a straight tube type lighting fixture, the output terminal block and the control are arranged so that the negative output terminal and the reference potential terminal are located at opposite ends. A terminal block can be arranged. This makes it easy to design the wiring pattern by differentially biasing the low voltage side and the high voltage side of the lighting circuit on the circuit board, thereby facilitating the pattern layout design on the circuit board.

It is a side view which shows the lighting device concerning embodiment of this invention. It is a top view which shows the lighting device concerning embodiment of this invention. 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 of FIG. FIG. 3 is a circuit diagram showing the lighting device 10 according to the embodiment of the present invention and the lighting fixture 1 having the same. The lighting fixture 1 is a straight tube type (note that the mechanical structure of the LED module 80 and the lighting fixture 1 is not shown), and a rectangular LED module 80 having an elongated outer shape as in the case of a conventional straight tube fluorescent lamp, Similarly to this, it has a rectangular lighting device 10 having an elongated outer shape. 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, parallel connection, or series-parallel connection. As shown in FIG. 1, the lighting device 10 includes a circuit board 20 and an upper cover 11 and a lower cover 14 that sandwich the circuit board 20. As shown in the plan view of FIG. 2, the lighting fixture 1 includes a circuit board 20 having a rectangular outer shape. The upper cover 11 does not cover the end of the circuit board 20 while covering the surface of the circuit board 20 as shown in FIG. On the other hand, the lower cover 14 has the same length as the circuit board 20.

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

  The plurality of terminals 31 to 36 include a reference potential terminal 31 connected to the ground, an output terminal 32 for outputting a signal from the LED control circuit 70 to the outside, and a signal from the outside to the LED control circuit 70. An input terminal 33 for inputting, a write terminal 34 for accessing and writing to the flash memory in the LED control circuit 70, a reset terminal 35 connected to the LED control circuit 70, and a control power supply voltage VCC are output. And a control power supply terminal 36. As shown in FIG. 1, the reference potential terminal 31 is located at the end opposite to the output terminal block 22 and is arranged farthest from the output terminal block 22 among the plurality of terminals 31 to 36. Even if the upper cover 11 is not removed, writing can be performed by accessing the memory (typically flash memory) inside the LED control circuit 70 via the write terminal 34.

  In the limited space on the long circuit board 20 suitable for the straight tube type lighting fixture 1, the output terminal block 22 and the control are controlled so that the negative electrode output terminal 26 and the reference potential terminal 31 are located at opposite ends. A terminal block 30 can be arranged. Thereby, the reference potential terminal 31 on the low voltage side and the output terminal on the high voltage side can be separated as much as possible. Since the low voltage side circuit and the high voltage side circuit are differently biased on the circuit board 20 to facilitate the design of the wiring pattern, the pattern layout design on the circuit board 20 is facilitated. Note that the positions of the negative output terminal 26 and the positive output terminal 24 in the output terminal block 22 may be interchanged.

  FIG. 2 schematically shows a wiring pattern layout on the surface of the circuit board 20. The circuit board 20 includes two long sides 20a and 20b extending in parallel. A reference potential zone 44 for reference potential is provided along the long side 20b on the side close to the reference potential terminal 31, and a conductive layer for reference potential is provided in this zone. Thereby, the conductive layers for the reference potential can be collected, and the pattern layout on the circuit board 20 is further facilitated. A rectified high voltage zone 40 and a lighting circuit side high voltage zone 43 are provided along the long side 20a on the side close to the output terminal block 22. The rectified high-voltage zone 40 is an area where a rectifier circuit 52 is provided and a DC voltage rectified by the rectifier circuit 52 is handled. The lighting circuit side high voltage zone 43 is a lighting circuit side high voltage zone including the buck converter 42, and a wiring layer connected to the positive electrode output terminal 24 is provided. As a result, the high voltage zones can be grouped, and the high voltage zone and the low voltage reference voltage zone can be arranged away from each other, particularly on the long sides 20a and 20b. Optimized. The buck converter circuit 42 includes an LED current detection resistor R4 that detects the current of the LED element of the LED module 80. One end of the current detection resistor R4 is connected to the negative output terminal 26, and the other end of the current detection resistor R4 is connected to the conductive layer of the reference potential zone 44. This facilitates the arrangement on the circuit board 20 particularly when a lead resistor is used as the current detection resistor R4.

  As shown in the circuit diagram of FIG. 3, the lighting device 10 is connected to a rectifier circuit 52 that is a diode bridge connected to the positive input terminal 12 a and the negative input terminal 12 b via the switch 51, and to the output terminal of the rectifier circuit 52. An inrush current prevention circuit 53, a boost chopper circuit 41, and a buck converter circuit 42 are provided. The lighting device 10 further includes a switching power supply 58 configured by a power device to generate a control power supply voltage VCC, a step-down circuit 59, a MOSFET driver 60 connected to the gates of the switching elements 56, 57, a diode D2, a capacitor C3, and an LED current. Is provided. The positive input terminal 12a and the negative input terminal 12b are connected to an AC power source Vac, and the power source of the LED module 80 is generated from the AC power source Vac using these circuits.

  The step-up chopper circuit 41 includes an inductor 54 having one end connected to the high potential side of the rectifier circuit 52 via the inrush current prevention circuit 53, a switching element 56 that is a MOSFET connected to the other end of the inductor 54, an anode A diode D1 having a terminal connected to a connection point between the switching element 56 and the inductor 54, a smoothing capacitor C1 having a positive electrode connected to the cathode terminal of the diode D1 and a negative electrode 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 by resistors R1 and R3 and input to the LED control circuit 70. The voltage value of the resistor R <b> 2 that is 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. In accordance with a control signal from the LED control circuit 70, the MOSFET driver 60 supplies a drive signal to the gate of the switching element 56.

  The buck converter circuit 42 includes a series circuit of a switching element 57 made of a MOSFET and a diode D3, and this series circuit is connected in parallel with 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 through the LED module 80. The buck converter circuit 42 is a so-called non-insulated step-down converter. The detection voltage from the resistor R4 that detects the LED current is input to the LED control circuit 70, and the LED control circuit 70 switches the buck converter circuit 42 based on this detection voltage so that the current flowing through the LED element becomes a constant current. The element 57 is turned on / 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 to the ground by connecting to the wiring 62 through the wiring 64. In the present embodiment, the negative output terminal 26 and the reference potential terminal 31 are separated from each other so that the wirings 62 and 64 are as far away as possible. In addition, the some terminals 31-36 with which the control terminal block 30 is provided are each electrically connected to each circuit of the lighting device 10 by connecting with the wiring pattern provided in the circuit board 20. That is, signal transmission to the outside of the lighting device 10 is not performed using expensive insulating parts such as a photocoupler.

  FIG. 3 also shows the connection unit 100. The connection unit 100 is configured to be connectable to a plurality of terminals 31 to 36 via the control terminal block 30 and can expand the functions of the lighting device 10 and the lighting fixture 1 including the same. As an example, the connection unit 100 can be a human sensor that detects the presence of a person. The connection unit 100 as a human sensor has its internal circuit connected to the ground via the reference potential terminal 31, receives power supply from the control power supply terminal 36, and sends the sensor signal to the LED control circuit 70 via the input terminal 33. To enter. The LED control circuit 70 performs lighting control based on a detection result by the connection unit 100 as a human sensor. However, the present invention is not limited to this, and it is only necessary to prepare the connection unit 100 having various functions in order to realize various extended functions other than human detection. In a typical scene, the function expansion of the lighting device 10 and the lighting fixture 1 is facilitated.

DESCRIPTION OF SYMBOLS 1 Lighting fixture, 10 Lighting device, 11 Upper cover, 12 Input terminal block, 12a Positive input terminal, 12b Negative input terminal, 14 Lower cover, 20 Circuit board, 20a, 20b Long side, 20c, 20d Short side, 22 Output terminal 24, positive output terminal, 26 negative output terminal, 30 control terminal block, 31 reference potential terminal, 32 output terminal, 33 input terminal, 34 write terminal, 35 reset terminal, 36 control power supply terminal, 40 high voltage zone after rectification , 41 step-up chopper circuit, 42 buck converter circuit, 43 lighting circuit side high voltage zone, 44 reference potential zone, 51 switch, 52 rectifier circuit, 53 inrush current prevention circuit, 54 inductor, 56, 57 switching element, 58 switching power supply, 59 step-down circuit, 60 MOSFET driver, 62, 64 wiring, 0 LED control circuit, 80 LED modules, 100 connection unit

Claims (10)

A circuit board having a rectangular outer shape provided with a lighting circuit;
An output terminal block provided at an end of the short side of the surface of the circuit board;
A control terminal block provided next to the output terminal block on the surface of the circuit board;
With
The output terminal block includes a positive output terminal and a negative output terminal connected to the output side of the lighting circuit and arranged in a plane direction of the circuit board,
The control terminal block includes a plurality of terminals arranged in a plane direction of the circuit board,
The lighting device includes a plurality of terminals including a reference potential terminal located at an end opposite to the output terminal block. Two along the side of the long side closer to the reference potential terminal of the long side of the circuit board, the lighting device according to claim 1 in which the conductive layer for criteria potential is provided. The lighting circuit includes a current detection resistor for detecting a current of the light emitting element,
The lighting device according to claim 2 , wherein one end of the current detection resistor is connected to the negative output terminal, and the other end of the current detection resistor is connected to the conductive layer.   4. The lighting device according to claim 2, wherein a wiring layer connected to the positive output terminal is provided along a long side closer to the output terminal block among two long sides of the circuit board.   The lighting device according to claim 1, wherein the plurality of terminals, the negative output terminal, and the positive output terminal are arranged in this order in the planar direction. The lighting circuit includes a control power supply circuit for supplying control power,
The lighting device according to any one of claims 1 to 5, wherein the plurality of terminals included in the control terminal block include a control power supply terminal that outputs the control power supply. The lighting circuit includes a control circuit,
The plurality of terminals include at least one of an input terminal for inputting a signal to the control circuit and an output terminal for outputting a signal from the control circuit. The lighting device described in 1. The lighting circuit includes a control circuit,
A cover that covers the surface of the circuit board and does not cover the end of the circuit board;
The lighting device according to claim 1, wherein the plurality of terminals include a write terminal for accessing the control circuit to perform writing. A light emitting module;
A lighting device;
With
The lighting device is
A circuit board having a rectangular outer shape provided with a lighting circuit;
An output terminal block provided at an end of the short side of the surface of the circuit board;
A control terminal block provided next to the output terminal block on the surface of the circuit board;
With
The output terminal block includes a positive output terminal and a negative output terminal connected to the output side of the lighting circuit and arranged in a plane direction of the circuit board,
The control terminal block includes a plurality of terminals arranged in a plane direction of the circuit board,
The plurality of terminals are straight tube luminaires including a reference potential terminal located at an end opposite to the output terminal block.   The lighting fixture of Claim 9 provided with the connection unit connected with these terminals which the said control terminal block has.

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