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Cold cathode fluorescence lamp and manufacturing method thereof

A cold-cathode fluorescent lamp and fluorescent layer technology, which is applied in cold-cathode manufacturing, electrode system manufacturing, and discharge tube/lamp manufacturing. It can solve existing problems and achieve the effects of easy manufacturing, low burden, and low cost.

Inactive Publication Date: 2010-02-10
NEC LIGHTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these discharge lamps are actually problematic due to the molybdenum, niobium and other substances used in the surface of each electrode

Method used

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  • Cold cathode fluorescence lamp and manufacturing method thereof
  • Cold cathode fluorescence lamp and manufacturing method thereof

Examples

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example 1

[0052]A raw material obtained by mixing iron with graphite and other elements in the ratio shown in Table 1 was melted at a temperature of 1400°C. The melt is injected into a mold including the cavity, and the injected material at a temperature between 800°C and 900°C is immersed in water at room temperature and quenched. Thereafter, a metal wire having a diameter of approximately 0.2 mm was produced by repeating hot forging treatment at 500° C. and hot rolling treatment, stretching, and other treatments to deform the coil in multiple directions. The wire was head processed to produce a cup-shaped electrode with an outer diameter of 1.7 mm and a length of 5 mm. A Kovar metal wire having a diameter of 0.8 mm was welded to the bottom of the formed electrode and bonded thereto.

[0053] The average diameter of the iron crystal grains in the electrode was measured using a comparative method. The average diameter of the iron crystal grains was 2 μm.

[0054] A fluorescent substa...

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PUM

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Abstract

The invention provides a cold cathode fluorescence lamp and a manufacturing method thereof. The cold cathode fluorescence lamp of the invention comprises electrodes, each of which has excellent sputtering resistance with strong exerted current, almost forms no amalgam with small damage to environment, can be easily manufactured and can provide an actual level work with long service life. The coldcathode fluorescence lamp of the invention further comprises a transparent tube which is provided with a fluorescence layer disposed on the inner wall surface, contains inert gas and mercury and the two ends of the transparent tube are sealed by a sealing element. Furthermore, the invention comprises an electrode which is disposed nearby two ends in the transparent tube and a lead which is connected to the electrode and passes through the sealing element. Each electrode is made of ferrous material or ferroalloy material. The ferrous material or ferroalloy material has an average diameter of 4.9 microns or a micro-structure formed by smaller ferrous or ferroalloy grain crystal.

Description

[0001] The present invention was made based on the priority claimed in Japanese Patent Application No. 2008-204565, and the entire contents described in the parent application are incorporated herein. technical field [0002] The present invention relates to a cold-cathode fluorescent lamp and a method for manufacturing the same, and more particularly, to a method for improving the sputtering resistance of the electrode so that its life is improved even when a large tube current is applied. A cold-cathode fluorescent lamp that is also extended, and a method for manufacturing the cold-cathode fluorescent lamp. Background technique [0003] Cold-cathode fluorescent lamps are characterized by high brightness, excellent color rendering, long life, low energy consumption and other properties. Therefore, they are usually used as backlights for televisions, computers and other liquid crystal display devices, fax machines and other Image reading light sources in similar devices, era...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/067H01J61/16H01J61/36H01J9/02
CPCH01J61/04H01J61/0672H01J61/0675H01J61/09H01J61/366H01J61/44H01J61/78
Inventor 杉村俊和藤冈诚一郎
Owner NEC LIGHTING