JP2002140926A - Electric-discharge lamp lighting device and illuminating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric-discharge lamp lighting device and a lighting system capable of miniaturizing a circuit board easily by arranging a high voltage generation part on the circuit board properly. SOLUTION: A lighting circuit having the high voltage generation part 5 and connected electrically with power supply 8 and an electric-discharge lamp 9 which becomes a light source to control lighting of the electric-discharge lamp 9 is formed on the circuit board 10 and the circuit board 10 is stored in a case to constitute the electric-discharge lamp lighting device 1. The high voltage generation part 5 is provided along a fringe part of the circuit board 10 toward the direction connecting connection end parts 11, 12 on a power supply 8 side and an electric-discharge lamp 9 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp lighting device and a lighting device using a discharge lamp such as an HID lamp as a light source.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a high voltage generating section (not shown) is provided, and a power supply and a lighting control of the discharge lamp 101 are electrically connected to a discharge lamp 101 as a light source. Is formed on a circuit board, and the circuit board is accommodated in a case. This discharge lamp lighting device 100 is, for example, an automotive headlamp,
A reflector 102 having an opening on one side for controlling the light distribution around the discharge lamp 101 and controlling the lighting of the discharge lamp 101 is called an electronic ballast.
In this case, a lighting circuit electrically connected to the power supply and the light source mounting socket 103 is provided in a case below the housing 104 having the front opening.

This lighting circuit has, for example, the configuration shown in the circuit example of FIG. 4 and serves as a circuit board block, which includes an input filter 106, a power converter 107 having a DC-DC converter and a low-frequency inverter, an output filter 108, It is formed by a voltage generator 109, a control circuit 110, and an igniter 111.

The DC voltage from the power supply E1 is applied to the circuit board 10
5, the signal passes through a noise absorption input filter 106, and is input to a DC-DC converter that is a stage preceding the power conversion unit 107. This power conversion unit 107 is provided for the discharge lamp 1
01 for stably lighting, and once boosts the DC voltage from the power supply E1, converts the power into low-frequency AC of the load power supply, and controls the power supply to the load. That is, the low-frequency inverter at the subsequent stage of the power conversion unit 107 is
By alternating the polarity of the output voltage to the discharge lamp 101 at a low frequency, rectangular wave lighting is enabled.

The igniter 111 causes a breakdown between the electrodes of the discharge lamp 101 when the power is turned on, thereby causing the discharge lamp 101 to be turned on. The igniter 111 normally generates a pulse voltage of several kV to several tens kV. Therefore, the igniter 111 is provided near the discharge lamp 101. In this device, since the above-described pulse voltage is generated by the igniter 111, the power conversion unit 107
Of the DC-DC converter is increased to several kV, and the igniter 111
Is entered. That is, a voltage is applied to the igniter 111 via the output terminal of the circuit board 105 from the path from the power conversion unit 107 through the output filter 108 for noise absorption and the two paths from the high voltage generation unit 109. . The control circuit 110 performs feedback control from the power conversion unit 107 and the high-voltage generation unit 109 to the power conversion unit 107, and is formed by an IC.

The lighting circuit is a circuit board 1 shown in FIG.
In FIG. 05, each circuit component is arranged and formed so that the circuit pattern does not overlap between the input terminal 112 and the output terminal 113, and is housed in the case below the housing 104. When a power supply voltage is applied to the circuit board 105, the discharge lamp 101 is turned on to emit light, and the light generated from the discharge lamp 101 is distributed by the reflecting mirror 102 on the front side of the discharge lamp lighting device 100. Light can be controlled and illuminated.

[0007]

However, in the case of the above-mentioned conventional technology, the high-voltage generating section 109 is provided with the circuit board 105.
, And an input filter 106, a power conversion unit 107, an output filter 108, and a control circuit 110 are arranged around the high voltage generation unit 109. Therefore, it is necessary to secure an appropriate insulation distance between the high voltage generator 109 and the circuits around them. As a result, there is a problem that a large area (shaded area A) where components cannot be arranged is generated around the high voltage generating unit 109, and the circuit board becomes large.

The high voltage generator 109 operates at a relatively high frequency. Therefore, there is a concern that the control circuit 110 may malfunction when an IC component serving as the control circuit 110 is provided close to the IC component.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to enable a high-voltage generating section to be appropriately disposed on a circuit board so that the circuit board can be easily miniaturized. It is an object of the present invention to provide a discharge lamp lighting device and a lighting device.

[0010]

In order to achieve the above object, a discharge lamp lighting device according to the present invention has a high voltage generator, and is electrically connected to a power supply and a discharge lamp serving as a light source. A lighting circuit that performs lighting control of the discharge lamp is formed on a circuit board, and in the discharge lamp lighting device including the circuit board in a case, the high-voltage generating unit includes the power supply side and the discharge lamp side. Are provided along the edge of the circuit board in the direction connecting the connection ends.

In this configuration, the high voltage generating section of the lighting circuit is formed in a vertically elongated shape along the edge of the circuit board in the direction connecting the connection ends with the power supply side and the discharge lamp side. Therefore, it is possible to reduce an area on the circuit board, around which the high voltage generating section cannot be arranged.

It is preferable that the connection end on the discharge lamp side is disposed at a position deviated toward the corner of the circuit board.
In this case, the vertically formed high voltage generating portion of the lighting circuit is formed so as to communicate with the discharge lamp side connection end portion that is biased toward the corner of the circuit board. Therefore, the area around the high voltage generating section of the circuit board where no components can be arranged can be further reduced.

[0013] It is also preferable that the high voltage generating section is disposed at a position deviated toward the connection end of the discharge lamp. In this case, the high voltage generating portion of the lighting circuit is formed concentratedly near the connection end of the circuit board on the discharge lamp side. Therefore, the area around the high voltage generating section of the circuit board where no components can be arranged can be further reduced.

The high-voltage generating section is configured such that an alternating voltage output of a pulse transformer provided in a boosting power conversion section constituting the lighting circuit is input to the high-voltage generation section. It is preferable that only the high voltage generating section is provided between the discharge lamp and the connection end. In this case, the high-voltage generating unit that constitutes the lighting circuit for lighting control of the discharge lamp includes:
The alternating voltage output of the pulse transformer provided in the power converter for boosting is configured to be the input, and only the high voltage generator is provided between the power converter and the connection end on the discharge lamp side. Thus, a circuit board is formed.

Further, the lighting device of the present invention is characterized in that the discharge lamp lighting device according to any one of the above structures is electrically connected to the discharge lamp via a discharge lamp lighting igniter. I have.

[0016]

1 and 2 show an embodiment corresponding to all of the first to fifth aspects of the present invention. FIG. 1 is a circuit diagram of a discharge lamp lighting device according to an embodiment of the present invention. FIG. 2 is an explanatory diagram showing a schematic configuration of a circuit board of another embodiment of the discharge lamp lighting device.

The discharge lamp lighting device 1 of this embodiment has a high voltage generator 5, a power supply 8 and a discharge lamp 9 serving as a light source.
In the discharge lamp lighting device 1 in which a lighting circuit electrically connected to and controlling the lighting of the discharge lamp 9 is formed on the circuit board 10 and the circuit board 10 is housed in a case, the high-voltage generating section 5 In the direction connecting the connection ends (11, 12) with the power supply 8 side and the discharge lamp 9 side.
It is provided along the edge.

Further, in the discharge lamp lighting device 1 of the embodiment, the connection end (12) on the discharge lamp 9 side is disposed at a position deviated toward the corner of the circuit board 10. In the discharge lamp lighting device 1 of the embodiment, the high voltage generator 5 receives an alternating voltage output of a pulse transformer T1 provided in a boosting power converter 3 constituting the lighting circuit. And only the high-voltage generating unit 5 is provided between the power conversion unit 3 and the connection end 12 on the discharge lamp side.

More specifically, the discharge lamp lighting device 1 includes, for example, a main body of a vehicle headlight described in the section of the prior art with reference to FIG. 3, a downlight embedded in a ceiling of a building, and the like. It can be suitably used as a lighting device. That is, the discharge lamp 9 is turned on by being mounted on a reflecting mirror in which the discharge lamp 9 serving as a light source lamp is mounted inside and a lighting device having a housing with an open end surface for protecting the reflecting mirror. In addition, as shown in FIG. 3, the discharge lamp lighting device 1 includes an igniter 7 provided inside the above-described socket provided on the back surface of the reflecting mirror with the discharge lamp 9 via an external electric wire with the power supply 8. Connected via an internal electric wire.

A circuit board 10 serving as a lighting circuit of the discharge lamp lighting device 1 is formed of a single-sided circuit board made of, for example, a glass epoxy resin base material. As shown in FIG. , An output filter 4, a high voltage generator 5, and a control circuit 6. And an input end 11 which is a connection end on the power supply 8 side, provided with a connector for wiring connection, respectively;
It is formed between the discharge terminal 9 and the output terminal 12 which is the connection end of the discharge lamp 9. The above circuit configurations are the same as those described in the section of the prior art shown in FIG. 4, and the input filter 2, the power conversion unit 3, the output filter 4 and the control circuit 6 are composed of a low voltage unit, a high voltage The generating unit 5 becomes a high-pressure unit.

In this case, the output terminal 12 is disposed so as to be biased toward one of the four corners of the circuit board 10, and the high-voltage generating section 5 of the high voltage section is disposed so as to be in contact with the output terminal 12. The input filter 2, the power converter 3, the output filter 4, and the control circuit 6 of the low-voltage section are connected to the output terminal 12 so as to surround them. Further, in this case, the high voltage generating unit 5 constituting the lighting circuit is configured such that the alternating voltage output of the step-up pulse transformer T1 provided in the power conversion unit 3 is input as shown in FIG. Further, only the high voltage generator 5 is connected between the power converter 3 and the output terminal 12 serving as the connection end on the discharge lamp side, between the power supply 8 side and the discharge lamp 9 side of the circuit board 10. Is formed vertically along the edge of the direction connecting the input end 11 and the output end 12 of
The smaller border between the high and low pressure sections is effectively isolated between them.

In the discharge lamp lighting device 1 described above, the high voltage generator 5 of the lighting circuit is arranged along the edge of the circuit board 10 in the direction connecting the connection ends of the circuit board 10 with the power supply 8 and the discharge lamp 9. The circuit board 10 is formed in a vertically long shape, and the circuit board 10 is housed in a case below the housing 104 shown in FIG. Then, a power supply voltage is applied to the circuit board 10, and the discharge lamp 9 of the light source lamp is turned on to emit light. The light generated from the discharge lamp 9 is illuminated by light distribution control by the reflector.

Therefore, according to the discharge lamp lighting device 1 described above, the high voltage generating section 5 of the lighting circuit includes the circuit board 1
0 is formed in a vertically elongated shape along the edge thereof in the direction connecting the connection ends with the power supply 8 side and the discharge lamp 9 side. (Shaded area) can be reduced, so that the high voltage generator 5
Is appropriately arranged on the circuit board 10, and the circuit board 10 can be easily reduced in size.

Then, the high voltage generating portion 5 of the vertically elongated lighting circuit is formed so as to communicate with the connection end of the discharge lamp 9 at a position deviated toward the corner of the circuit board 10, so that the circuit board 10
The area around the high voltage generating section 5 where no components can be arranged can be further reduced. Further, the high voltage generating unit 5 constituting the lighting circuit for controlling the lighting of the discharge lamp is configured such that an alternating voltage output of a pulse transformer provided in the boosting power conversion unit 3 is input to the high voltage generating unit 5. Since only the voltage generator 5 is provided between the power converter 3 and the output terminal 12 to form the circuit board 10, the high voltage generator 5 of the circuit board 10 is formed.
The surrounding area where parts cannot be placed can be further reduced,
The entire lighting device can be made compact.

According to the present invention, in addition to the above, for example, as shown in FIG. 2A, the connection end on the discharge lamp 9 side is arranged at an intermediate position of one edge of the circuit board 10. As shown in FIG. 2B, the high voltage generator 5 is connected to a power supply 8.
2 is arranged in a more elongated shape toward the connection end on the discharge lamp 9 side along the edge of the circuit board 10 in the direction connecting the connection end with the discharge lamp 9 side, or FIG. As shown in c), of course, in the various embodiments such as those in which the connection ends of the high voltage generation unit 5 and the discharge lamp 9 are arranged at the intermediate position between two edges where the circuit board 10 intersects, The boundary between the high-pressure section and the low-pressure section can be made smaller than in the conventional configuration.

[0026]

The present invention is embodied as in the above-described embodiment, and it is possible to reduce the area of the circuit board where components cannot be arranged around the high-voltage generating section, so that the high-voltage generating section can be appropriately mounted on the circuit board. The circuit board can be easily miniaturized by being arranged on the board, and the entire lighting device can be miniaturized.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a circuit board of a discharge lamp lighting device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a schematic configuration of a circuit board of another embodiment of the discharge lamp lighting device.

FIG. 3 is a schematic configuration diagram illustrating an example of a discharge lamp lighting device and an illumination device.

FIG. 4 is a circuit diagram illustrating an example of a lighting circuit of the discharge lamp lighting device.

FIG. 5 is a schematic configuration diagram showing a circuit board of a discharge lamp lighting device as a conventional example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Discharge lamp lighting device 3 Power conversion part 5 High voltage generation part 8 Power supply 9 Discharge lamp 10 Circuit board

Claims (5)

[Claims] A lighting circuit having a high-voltage generating section, electrically connected to a power supply and a discharge lamp serving as a light source, for controlling lighting of the discharge lamp is formed on a circuit board, and the circuit board is mounted in a case. Wherein the high-voltage generating section is provided along the edge of the circuit board in a direction connecting the connection ends of the power supply side and the discharge lamp side. Discharge lamp lighting device. 2. The discharge lamp lighting device according to claim 1, wherein the connection end on the discharge lamp side is disposed at a position deviated toward a corner of the circuit board. 3. The discharge lamp lighting device according to claim 1, wherein the high voltage generator is disposed at a position deviated toward the connection end of the discharge lamp. 4. The high-voltage generating section is configured such that an alternating voltage output of a pulse transformer provided in a boosting power conversion section constituting the lighting circuit is input thereto, and
4. The discharge lamp lighting device according to claim 2, wherein only the high-voltage generation unit is provided between the power conversion unit and the connection end on the discharge lamp side. 5. A lighting device, wherein the lighting device is electrically connected to the discharge lamp via the discharge lamp lighting igniter from the discharge lamp lighting device according to any one of claims 1 to 4. .