JPH04107968U - light source device - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a new light source device incorporating an outer wall electrode type rare gas discharge lamp 4. [Configuration] Circuit board 12 incorporating lighting circuit components 13
Arc-shaped electrode terminals 14A, 14B are disposed above, and the rare gas discharge lamp 4 is held between the outer wall electrodes 3A, 3B. The connection portion between the circuit board 12 and the rare gas discharge lamp 4 is covered with a resin compound 15, leaving the light emitting portion. [Effects] The rare gas discharge lamp 4 can be easily connected to the circuit, and the circuit board 12 and the electrode connection portion of the discharge lamp 4 can be insulated and covered.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a new light source device incorporating an outer wall electrode type rare gas discharge lamp.

0002

[Conventional technology]

In general, rare gas discharge lamps have a narrow outer diameter and use rare gas discharge, so the brightness and discharge voltage It has features such as pressure being almost unaffected by ambient temperature and long life. It is used as a light source for reading documents in OA equipment such as OCR, and as a backlight for LCD devices. It's coming.

0003 However, conventional rare gas discharge lamps were developed in, for example, Japanese Patent Application Laid-Open No. 62-281256. As shown, a pair of electrodes are sealed at both ends of the elongated glass bulb, and An auxiliary electrode is attached closely to the outer wall of the glass bulb between both electrodes, and the positive column is connected to the auxiliary electrode. Since the excitation efficiency of the phosphor film is poor, a bright one is advantageous. There were some drawbacks, and the discharge was also unstable.

0004 Therefore, as shown in FIG. A rare gas whose main component is xenon gas is charged into the last valve 2 at a predetermined pressure and sealed. A structure in which a pair of band-shaped electrodes 3A and 3B are arranged opposite to the outer wall of the glass bulb 2. We have developed an external wall electrode type rare gas discharge lamp 4.

[0005] The outer wall electrode type rare gas discharge lamp 4 having such a structure has high-frequency waves between the strip electrodes 3A and 3B. When a voltage, for example 30KHZ or 2KV is applied, the glass between both strip electrodes 3A and 3B is applied. A discharge of xenon gas is generated in the discharge space of the bulb 2, which excites the phosphor film 1 and generates a It emits visual light. This outer wall electrode type rare gas discharge lamp 4 has both strip electrodes 3A, 3. If the area of B is formed to have a certain width, a stable discharge will occur, and its illumination will be The brightness was also much brighter.

[0006]

[Problem that the idea aims to solve]

Tororo's outer wall electrode type rare gas discharge lamp 4, which has these excellent features, is a light source. When incorporating the device into a lighting circuit, insulation between the electrodes must be taken as the voltage is high. It is difficult to connect to the circuit, for example, in the past, lead wires were soldered onto the electrodes. Because the circuit was connected, it was necessary to further insulate the connection, and It took a lot of man-hours to assemble the light source device, such as covering the edges.

[0007] Therefore, the present invention was developed in view of the above, and is an improvement to the outer wall electrode type rare gas discharge lamp. The aim is to obtain an assembly structure that makes it easy to assemble the light source device and has good insulation. are doing.

[0008]

[Means to solve the problem]

In order to achieve the above object, the present invention provides a circuit board incorporating a lighting circuit. A pair of electrode terminals are arranged to elastically support the outer wall electrodes of the gas discharge lamp from both sides. The outer walls of both strip electrodes of the rare gas discharge lamp are held between the electrode terminals. . Furthermore, the circuit board and discharge lamp assembled in this way are attached to the light emitting part of the discharge lamp. The remaining parts are covered with a resin compound.

[0009]

[Effect]

A light source device with such a structure has both strip-shaped electrodes of a rare gas discharge lamp between the electrode terminals of the circuit board. By sandwiching the outer wall of the electrode, circuit connection and assembly of the electrode are made extremely easy. The connection portion is also coated with a resin compound, providing good insulation. Also, The light source device should be designed so that the circuit board and discharge lamp electrodes are not exposed, leaving the light-emitting part of the discharge lamp intact. This prevents electric shock during use and ensures safety.

0010

【Example】

An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows the assembled state of the outer wall electrode type rare gas discharge lamp 4 of the light source device 11 according to the present invention. FIG. In the figure, 12 is a small circuit board, which is used for semiconductor devices, etc. A pair of electrode terminals 1 for connecting a lighting circuit component 13 consisting of electronic components and a rare gas discharge lamp 4 4A and 14B are installed. Electrode terminals 14A and 14B are nickel and phosphor blue. It is made of an arc-shaped biconductive elastic metal plate such as copper, and as shown in Figure 3, it is The sections are arranged oppositely so as to sandwich the glass bulb of the discharge lamp 4 from both sides. There is.

[0011] The light source device 11 having such a structure has a Attach both strip electrodes 3A and 3B to the outer wall of the glass bulb of the rare gas discharge lamp 4. The electrodes of the discharge lamp 4 are connected and the discharge lamp is assembled at the same time. This discharge lamp When assembling 4 to the electrode terminals 14A and 14B, both strip electrodes 3A and 3B are assembled with glass bars. Since it is formed in a band shape along the outer wall of the glass bulb 2, the axial position of the glass bulb is The electrode terminals 14A and 14B can be set freely, so the electrode terminals 14A and 14B can be set as shown in the pair or as required. This allows multiple pairs to be provided at appropriate positions and easily mounted.

0012 FIG. 4 shows the mounting part of the rare gas discharge lamp 4 of the circuit board 12 of the light source device 11 made of resin. 1 shows a perspective view of a light source device 16 coated with a synthetic compound 15. This light source In the case 16, the entire circuit board 12 including the mounting part at one end of the rare gas discharge lamp 4 is made of resin compound. 15, which provides insulation for the electrode connection part, and is suitable for copying machines and document reading. Suitable for light sources. In addition, although not shown, the top of the uncoated rare gas discharge lamp 4 is coated with a transparent resin. If it is covered with a cap made of aluminum, the entire rare gas discharge lamp 4, including the strip electrodes 3 and 3, will be insulated. For example, it can be used as a light source for instruction.

[0013] In FIG. 5, the light emitting part of the rare gas discharge lamp 4 of the light source device 11 is left, and the circuit board 12 is and a light source device 17 in which the entire rare gas discharge lamp 4 is coated with a resin compound 15. A perspective view is shown. This light source device 17 includes the rare gas discharge lamp 4 of the light source device 17. The entire device is insulated like a normal light source device, making it safe to handle. Therefore, it can be mounted on a lighting fixture, for example, as an illumination light source. In this case, if the length of the rare gas discharge lamp 4 is shortened to make it more compact, it will be possible to It can be used as

[0014]

[Effect of the idea]

As described above, the present invention provides an external circuit for rare gas discharge lamps on a circuit board incorporating a lighting circuit. Electrode terminals are arranged to elastically support the wall electrode from both sides, making it possible to use both strip-shaped electrodes for rare gas discharge lamps. Since it is configured to be clamped from above, it is extremely easy to connect electrodes and incorporate rare gas discharge lamps. It's easy to do. In addition, the built-in circuit board and discharge lamp can be used to The structure is such that all parts are covered with a resin compound, so the insulation of the equipment is ensured. It can be safely handled like a normal light source device.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway sectional view of an outer wall electrode type rare gas discharge lamp used in the light source device of the present invention.

FIG. 2 is a perspective view showing an assembled state of a light source device according to an embodiment of the present invention.

3 is a side view showing a state in which the electrode terminal of FIG. 2 is attached to the rare gas discharge lamp; FIG.

FIG. 4 is a perspective view of a light source device according to another embodiment of the present invention.

FIG. 5 is a perspective view of a light source device according to still another embodiment of the present invention.

[Explanation of symbols]

3A, 3B Outer wall electrode 4 Rare gas discharge lamp 11, 16, 17 Light source device 12 Circuit board 13 Circuit parts 14A, 14B electrode terminal 15 Resin compound

Claims (2)

[Scope of utility model registration request] 1. A light source device characterized in that arc-shaped electrode terminals are disposed on a circuit board incorporating a lighting circuit so as to elastically support an outer wall electrode of a rare gas discharge lamp from both sides. . 2. The light source device according to claim 1, wherein the circuit board and the connecting portion of the discharge lamp are coated with a resin compound, leaving at least the light emitting portion of the rare gas discharge lamp.