High photosynthetic efficiency external electrode porcelain tube cathode fluorescent lamp and its making method

A technology for fluorescent lamps and external electrodes, which is applied in the manufacture of discharge tubes/lamps, cold cathodes, and electrode systems. It can solve the problem of high voltage required for gas discharge, prolong the life of the lamp, lower the working voltage, and increase the brightness. Effect

Inactive Publication Date: 2006-07-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Existing external electrode fluorescent lamps (EEFL) such as figure 1 , it has a larger diameter, and the voltage required for gas discharge is also relatively high. It is now being used in LCD TVs as a

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  • High photosynthetic efficiency external electrode porcelain tube cathode fluorescent lamp and its making method
  • High photosynthetic efficiency external electrode porcelain tube cathode fluorescent lamp and its making method
  • High photosynthetic efficiency external electrode porcelain tube cathode fluorescent lamp and its making method

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Embodiment Construction

[0025] The fluorescent lamp of the present invention uses a slender fluorescent lamp glass tube 2 with two openings as the main body. The inner surface of the fluorescent lamp glass tube 2 is coated with fluorescent powder 1. The two ends of the fluorescent lamp glass tube 2 are placed with ceramic tubes 5, The tube 2 is filled with a discharge gas 3, and a pair of metal discharge electrode films 4 are provided on the outer surfaces of the two ends of the fluorescent lamp glass tube 2.

[0026] The ceramic tubes 5 placed at both ends of the fluorescent lamp glass tube 2 are made of alumina or magnesium aluminate with high secondary electron emission coefficient. The discharge gas 3 charged into the fluorescent tube 2 is an inert gas helium, or neon, or argon, or xenon, or a mixed gas thereof, and a discharge gas composed of mercury metal. A pair of metal discharge electrode films 4 prepared on the outer surfaces of the two ends of the fluorescent lamp glass tube 2 are metal thin f...

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Abstract

The high-efficiency low-voltage external electrode fluorescent lamp (EEFL) for LCD backlight source and illumination comprises: using a slim two-end-opening fluorescent glass tube (2) as main body with fluorescent powder (1) on inner surface and a ceramic tube (5) on inner surface of ends; filling discharge gas (3) in tube (2), setting a couple of metal discharge electrode membranes (4) on outer surface of tube (2) end. Wherein, when manufacturing the lamp, clearing and drying the EEFL, costing fluorescent powder 1 on inner surface, arranging ceramic tube such as alumina ceramic tube 5 on two ends of tube 2; then, sintering and sealing one opening of the tube.

Description

Technical field [0001] The invention relates to an external electrode fluorescent lamp (EEFL) used in occasions such as liquid crystal display backlight, electrical lighting and daily lighting, in particular to an external electrode fluorescent lamp with low working voltage and high luminous efficiency. Background technique [0002] The cold cathode fluorescent lamp is a new type of light source that does not require the heating of the cathode filament, and the tube diameter can be made very thin (usually below 10mm, such as 1.8mm). There are two types of cold cathode fluorescent lamps, namely internal electrode fluorescent lamps (CCFL) and external electrodes Fluorescent lamp (EEFL). The electrons and ions required for gas discharge in a cold cathode fluorescent lamp are composed of a gas ionization process and the secondary emission of electrodes, which are different from the gas discharge formed by the thermionic emission of a hot cathode fluorescent lamp (HCFL). The internal ...

Claims

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Application Information

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IPC IPC(8): H01J65/00H01J61/36H01J61/16H01J9/00H01J9/40
Inventor 张晓兵英达正
Owner SOUTHEAST UNIV
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