JP2000150176A - Inverter lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a printed circuit board in common for the same or lower wattage, and manufacture several types of inverter lighting circuits using the same printed circuit board. SOLUTION: This lighting device has a power circuit part 1 with input terminals N and H, and output terminals T1 to T4 on the same side of an approximately square printed circuit board 5 for outputting filtered voltage upon receipt of AC power from the input terminals N and H, and an inverter circuit part 2 for feeding high frequency power to a lamp from the output terminals T1 to T4 upon receipt of DC voltage from the power circuit part 1. In addition, the power circuit part 1 and the inverter circuit part 2 are mounted on the printed circuit board 5, and a means 6 is provided for dividing the printed circuit board 5 into two sections with the power circuit p art 1 and the inverter circuit part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter lighting device for lighting a discharge lamp at a high frequency.

[0002]

2. Description of the Related Art As a device for lighting a fluorescent lamp, an AC power source is converted into high-frequency power and supplied to the fluorescent lamp.
In recent years, inverter lighting devices for lighting at a high frequency have been widely used from the viewpoint of energy saving. There are many types of fluorescent lamps, and lighting fixtures have been developed and commercialized for residential use, facilities and stores, respectively.
In particular, lighting fixtures using compact fluorescent lamps, which are formed by folding a fluorescent tube several times into a shape similar to a conventional light bulb, are highly efficient.
It has been commercialized to complain of high output. Utilizing its shape, appliances using compact fluorescent lamps have been developed as downlight appliances as auxiliary lighting.

FIG. 8 is a schematic circuit diagram of an inverter lighting device which has taken measures against input current harmonics which have recently been subject to regulation. This lighting device uses an AC power supply AC as an input and a terminal X
The power supply circuit 1 includes a power supply circuit 1 that outputs a DC voltage between Y1 and Y1, and an inverter circuit 2 that converts the DC voltage between the terminals X2 and Y2 into high-frequency power and supplies the high-frequency power to the discharge lamp La. The DC output terminals X1 and Y1 of the power supply circuit unit 1 are connected to the DC input terminals X2 and Y2 of the inverter circuit unit 2, respectively.

First, the power supply circuit section 1 has a diode bridge DB for full-wave rectification, and its AC input terminal has a low-pass filter circuit composed of an inductor L1, a transformer FL and a capacitor C1, and a surge absorber element ZN.
It is connected to an AC power supply AC via an R and a fuse F. The DC voltage rectified by the diode bridge DB is converted to a choke L2, a switching element Q1, and a diode D.
The switching element Q1 is turned on and off at a high frequency by the chopper control circuit 3 at a high frequency, whereby the electrolytic capacitor C3 is charged with the DC voltage boosted from the power supply voltage. At the same time, the input current is made substantially the same waveform as the power supply voltage by turning on / off the high frequency of the switching element Q1 to take measures against the input current harmonic. In the chopper control circuit 3, the output voltage of the diode bridge DB, the source current of the switching element Q1, the output voltage obtained from the capacitor C3, the choke L
2, the chopper control circuit 3 controls the switching element Q1 according to the detected values.
On duty and switching frequency are controlled.

[0005] Next, the inverter circuit section 2 connects the series circuit of the switching elements Q2 and Q3 to the DC input terminals X2 and Y2.
And a series circuit of a driving transformer CT, a resonance choke L3, a coupling capacitor C5, and a discharge lamp La is connected in parallel with one switching element Q2.
The resonance capacitor (preheating capacitor) C6 is connected in parallel between the non-power-supply-side terminals of both filaments a. The secondary winding of the drive transformer CT is connected to the control input terminals of the switching elements Q2 and Q3 via the resistors R5 and R6. Resistance R3, R4, capacitor C4, diode D
2. The switching element Q3 is activated by a known activation circuit including the resistor R7 and the voltage response element Q4. After the startup, in addition to the basic operation of performing the self-excited oscillation operation by the drive transformer CT, the inverter control circuit 4 determines the OFF timing of the switching element Q3 and controls the duty of the switching element Q3 to thereby control the output of the inverter. , For example, pre-heating control. Further, the inverter control circuit 4 detects the load voltage,
It has a function to stop oscillation when an abnormality occurs.

[0006] The inverter lighting device is mounted on a printed circuit board 5.
FIG. 9 shows a conventional example mounted above. FIG. 9 shows a mounting block for a downlight fixture using the compact fluorescent lamp described above, and the fixture form is mainly φ150, φ17 of the ceiling.
In order to assemble into the holes such as 5 and the like, the mounting form on the printed circuit board 5 also has a shape close to a square so as to enter the holes such as φ150 and φ175 as shown in FIG.

[0007]

The compact fluorescent lamp is currently of twin type 3 and has a lamp power of 42 W, 32 W and 24 W.
There are W and 16 W lamps, and a Hf straight tube fluorescent lamp that has been commercialized in recent years also includes a 32 W type lamp. Even with the same 32 W fluorescent lamp, the lamp characteristics are different between the twin 3 type and the Hf straight tube type, and the circuit constant does not become the same specification. Since the lamp power is the same even if the circuit constants are different, it can be composed of parts of almost the same shape. Therefore, it is possible to design for the twin 3 type and Hf straight tube type fluorescent lamps on the same printed circuit board. It is.

However, since the twin 3 type fluorescent lamp is built in the downlight fixture as described above, the outer shape of the printed circuit board is almost square as shown in FIG. Since the straight tube type fluorescent lamp has a slender form since the lamp is a straight tube, a slender inverter lighting device is required to be built in the slender form.

[0009] Therefore, a dedicated printed circuit board is required, and a die investment for each printed circuit board is required. In addition, as a production line, an assembly line and solder bath corresponding to each are required,
In consideration of amortization, manufacturing cost, and the like, costs such as processing costs and depreciation costs that are different from the component material costs added per unit occur, resulting in an inverter lighting device having a high unit price.

The present invention has been made in view of such a point, and an object of the present invention is to make it possible to use a common printed circuit board with the same or lower wattage,
It is an object of the present invention to propose a means capable of manufacturing several types of inverter lighting devices on the same printed circuit board.

[0011]

According to the inverter lighting device of the present invention, in order to solve the above-mentioned problem, as shown in FIG. Parts N and H and output terminal parts T1 to T4,
A power supply circuit section 1 for inputting an AC power supply from the input terminal sections N and H and outputting a smoothed DC voltage; and receiving the DC voltage output from the power supply circuit section 1 to receive the output terminal section T1.
And a means 6 for mounting the inverter circuit unit 2 for supplying high frequency power to the lamp from T4 to the lamp on the printed circuit board 5, and dividing the printed circuit board 5 into two parts by the power supply circuit unit 1 and the inverter circuit unit 2. It is characterized by the following.

[0012]

FIG. 1 shows a printed circuit board mounting diagram embodying the present invention. The circuit mounted on the printed circuit board 5 is the circuit shown in the circuit diagram of FIG. 8, and the upper half of the printed circuit board dividing unit 6 is the power supply circuit unit 1 on the left side of the circuit diagram of FIG. The lower half of the dividing section 6 is the inverter circuit section 2 on the right side of the circuit diagram of FIG. 8, and the high frequency power is supplied to the lamps La by connecting the lamps La serving as loads to the output terminals T1 to T4.

FIG. 2 shows a second embodiment of the present invention. The circuit mounted on the printed circuit board 5 is the circuit shown in the circuit diagram of FIG. 4, but differs from the circuit diagram of the first embodiment shown in FIG. The high frequency cut choke LX is connected to the terminals X1 and X2 so as not to flow as a regenerative current to the electrolytic capacitor C3 of the circuit section 1.
A capacitor C7 is inserted between the input terminals X2 and Y2 of the inverter circuit unit 2 for bypassing the high-frequency current on the inverter circuit unit 2 side. In the embodiment of FIG. 2, the choke LX is arranged across the printed circuit board dividing section 6, and the capacitor C7 is arranged on the inverter circuit section 2 side as shown in the figure.

In addition, in the mounting example of FIG. 3, by providing an inductance component in a connection line (connector line) connecting the power supply circuit unit 1 and the inverter circuit unit 2, parts of the choke LX can be reduced. .

The printed circuit board 5 shown in FIG. 1, FIG. 2, or FIG. 3 is housed in a printed circuit board housing resin body 7 as shown in FIG. It is mounted on the appliance as an appliance inverter.

Next, in the case where the component constants of the example of mounting the printed circuit board of FIG. 3 are changed and mounting is performed for an Hf straight tube type 32 W fluorescent lamp, the mounting of FIG. In the final step, when the case is assembled, the printed circuit board is divided into two parts by the printed circuit board dividing part 6 and stored in the printed circuit board storage main body part 9 as shown in FIG. A structure that can be mounted on an elongated straight tube inverter device can be provided. 11 and 12 are instrument mounting holes.

Here, as means for dividing the printed circuit board 5, means for providing perforations 6a as shown in the plan view of FIG.
(B) Means for providing a V-cut 6b as shown in the cross-sectional view and (3) Push-back type means for once cutting obliquely with a mold and returning the substrate again in order to improve the accuracy of the divided portion There is. Generally, a combination of a perforation and a V-cut method is often used. In the present invention, the means for dividing the printed circuit board is not particularly limited, and any of the above means may be used.

[0018]

According to the present invention, an input terminal portion and an output terminal portion are provided on the same side of a printed circuit board which is almost square.
A power supply circuit for inputting an AC power supply from the input terminal and outputting a smoothed DC voltage, and an inverter for receiving the DC voltage output from the power supply circuit and supplying high-frequency power to the lamp from the output terminal And a circuit section mounted on the printed circuit board, and a means for dividing the printed circuit board into two parts by the power supply circuit section and the inverter circuit section. To provide high-frequency power to the lamp from the output terminal on the same side as the power flow enters from the input terminal and goes around the printed circuit board almost completely by providing the connection between the power supply and the inverter circuit. When the printed circuit board is not divided, it can be arranged on the lighting equipment as a circuit block that is almost a square. Also, the printed circuit board is divided into two and the input / output terminals are opposite to each other. By expanding, it can be mounted to the elongate luminaires straight fluorescent lamps. The specifications of the component constants are changed according to the circuit constants, but basically, if the lighting device is a lamp with the same rated power consumption or a lower rated power consumption, the component form should be designed with almost the same size. it can. As described above, according to the present invention, it is possible to provide an inverter block having a high degree of freedom that allows one printed circuit board to be used without being divided, or to be divided and mounted on a completely different device form for a straight pipe.

[Brief description of the drawings]

FIG. 1 is a plan view showing a mounting mode of a printed circuit board according to a first embodiment of the present invention.

FIG. 2 is a plan view illustrating a mounting form of a printed circuit board according to a second embodiment of the present invention.

FIG. 3 is a plan view showing a mounting form of a printed circuit board according to a third embodiment of the present invention.

FIG. 4 is a circuit diagram of a second or third embodiment of the present invention.

FIG. 5 is a plan view showing an embodiment in which the printed circuit board of the present invention is used without being divided.

FIG. 6 is a plan view showing an embodiment in which the printed circuit board of the present invention is divided and used for a straight pipe.

FIG. 7 is an explanatory view showing a means for dividing a printed circuit board according to the present invention.

FIG. 8 is a circuit diagram of a conventional example.

FIG. 9 is a plan view showing a mounting form of a conventional printed circuit board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power supply circuit part 2 Inverter circuit part 3 Chopper control circuit 4 Inverter control circuit 5 Printed circuit board 6 Printed circuit board division part N, H input terminal part T1-T4 output terminal part

Claims (6)

[Claims] 1. A power supply circuit section having an input terminal section and an output terminal section on the same side of a printed circuit board that is substantially square, and receiving an AC power supply from the input terminal section and outputting a smoothed DC voltage. Mounting an inverter circuit unit that receives a DC voltage output from the power supply circuit unit and supplies high-frequency power to the lamp from the output terminal unit on the printed circuit board, and that the power supply circuit unit and the inverter circuit unit An inverter lighting device comprising means for dividing the printed board into two. 2. The inverter lighting device according to claim 1, wherein the means for dividing the printed board into two is a perforation provided between a power supply circuit section and an inverter circuit section of the printed board. . 3. The inverter lighting device according to claim 1, wherein the means for dividing the printed board into two is a V-shaped groove provided between a power supply circuit section and an inverter circuit section of the printed board. apparatus. 4. The method according to claim 1, wherein the means for dividing the printed circuit board into two parts is a push-back method in which a space between a power supply circuit part and an inverter circuit part of the printed circuit board is cut obliquely in advance using a mold. 2. The inverter lighting device according to 1. 5. The inverter lighting device according to claim 1, wherein a connector line connecting the power supply circuit portion and the inverter circuit portion has an inductance component for cutting off a high-frequency current. 6. The inverter lighting device according to claim 1, wherein the power supply circuit is a chopper circuit.