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Electrode fixuture and cold cathode fluorescent lamp

A technology for fixing parts and electrodes, applied in the field of cold cathode fluorescent lamps, can solve the problems of difficulty in emitting electrodes, damage to performance, and reduction, and achieve the effect of inhibiting damage or performance degradation

Inactive Publication Date: 2008-10-01
HARISON TOSHIBA LIGHTING CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] But this existing electrode fixing part, there is the middle part between the electrode and the closed pin, so it is difficult to dissipate the heat generated by the electrode when the lamp is lit, and it is often caused by the temperature rise during use. damaged or degraded

Method used

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  • Electrode fixuture and cold cathode fluorescent lamp
  • Electrode fixuture and cold cathode fluorescent lamp
  • Electrode fixuture and cold cathode fluorescent lamp

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other Embodiment approach

[0068] The above-described embodiment is described with the electrode holder 4 in which the electrode 6 and the closed pin 9 are coplanarly joined, but in addition, it can also be used as Figure 8 As shown, the bonding is performed by the low melting point bonding material 8 so that the distance L between the electrode 6 and the sealing pin 9 is within 0.05 mm even if the sealing pin 9 and the electrode 6 are not in contact. Even in this mode, the heat generated by the electrodes 6 can be effectively dissipated when the lamp 1 is turned on to emit light similarly to the above-mentioned embodiment, and damage or performance degradation caused by temperature rise during use can be suppressed.

[0069] Examples of the present invention and their evaluation results will be described below.

Embodiment 1～2、 comparative example 1～7

[0071] Make electrode 6 and seal pin 9 coplanar bonding figure 2 The electrode holder 4 with the configuration shown is taken as the first embodiment.

[0072] for figure 2The electrode fixing part 4 is made, and the electrode fixing part is made so that the distance between the electrode 6 and the closed pin 9 is 0.05 mm, which is the second embodiment.

[0073] for figure 2 The electrode holder 4 is made separately so that the distance between the electrode 6 and the closed pin 9 is 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 1.0mm, and they are used as comparative examples 1~ 6.

[0074] for figure 2 The electrode holder 4 was prepared, and an electrode holder having a welded portion formed by alloying both the molten core wire 10a and the cover layer 10b was produced, which was used as Comparative Example 7.

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Abstract

The electrode fixed element of the invention is closed at two ends of a glass tube through a glass bead, comprising an electrode, a closing pin and an external lead. The closing pin joints the jointing surface of the closing pin and the electrode as the same surface through low-melting jointing materials made of metal materials with a melting point of below 1800 degrees centigrade. The closing pin can be formed by metal materials identical to the electrode, with a melting point of above 2000 degrees centigrade. Heat produced by electrode when lightened can be emitted efficiently by adopting the electrode fixed element.

Description

technical field [0001] The invention relates to an electrode fixing part sealed at both ends of a glass tube, and a cold cathode fluorescent lamp using the electrode fixing part and used as a backlight source of a liquid crystal display device such as a liquid crystal television. Background technique [0002] As the structure of the cold cathode fluorescent lamp, it can be known that a discharge medium composed of mercury and inert gas is sealed in a glass tube sealed by electrode holders at both ends through glass beads (bead glass), and a phosphor is adhered to the inner surface of the glass tube. A film (attached in such a way as to cover the inner surface of the glass tube) is such a structure. [0003] The electrode holder includes an electrode, a closed pin joined to the electrode, and an external lead joined to the closed pin. The electrode holder is sealed by installing glass beads on the sealing pins, inserting them respectively through both ends of the glass tube ...

Claims

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Application Information

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IPC IPC(8): H01J61/36H01J61/09H01J61/00
CPCG02F1/133604H01J61/0672H01J61/0675H01J61/36H01J61/526
Inventor 石山政之
Owner HARISON TOSHIBA LIGHTING CORP