Superfine pipe diameter cold-cathode fluorescence lamp tube

Abstract

The invention relates to a cold cathode fluorescent lamp tube having ultra-fine diameter (the outer diameter of the glass pipe for manufacturing the lamp tube is less than 6 mm). The cold cathode design, air discharging method and the application of getter all adopts a new method, which comprises a process for adopting a new cold cathode having a lead filament always exposing out of the glass pipe in the lamp manufacture process, externally connecting an air discharging pipe with the glass pipe directly, and keeping a getter in the air discharging pipe remaining on the lamp tube. The execution process of the invention comprises externally connecting one air discharging pipe on the glass pipe (bent) having fluorescent powder applied thereon directly, melting the lead filaments of two cold cathodes and respectively sealing and connecting the lead filaments with the glass pipe, positioning a non-volatile (mercury-dispensing) getter in the air discharging pipe, discharging air, dispensing mercury, activating the getter, remaining a portion of air discharging pipe having getter therein on the glass pipe, and carrying out normal production step such as aging until completing the entire lamp manufacture process.

Description

Technical field: [0001] The invention relates to the field of cold cathode design, exhaust method and getter application in the process of making ultra-fine diameter cold cathode fluorescent lamps (hereinafter referred to as CCFL), in particular to a glass for manufacturing fluorescent lamps with multiple improvements A method of manufacturing CCFLs with a tube outer diameter of less than 6 mm. Background technique: [0002] In the prior art, the working principle and appearance structure of energy-saving fluorescent lamps (CFL) and CCFL are basically the same. The working principle is that the electrons generated by the cathode, under the action of the electric field, produce high-speed motion to excite the mercury atoms inside the lamp tube, making it generate ultraviolet rays to excite the phosphor on the tube wall to emit light; the shape and structure are basically spiral and U-shaped. , Straight tube, etc. The difference is that the glass tube of CCFL is relatively t...

AI Technical Summary

Problems solved by technology

The main disadvantage of the zirconium-aluminum getter is the high activation temperature (900°C), which can easily cause the glass near the cold cathode to be overheated and burst; the main disadvantage of the zirconium-vanadium-iron getter is the low activation temperature (390°C), which It is easy to be activated in advance during the exhaust process, resulting in a reduction in its suction capacity or even premature failure

In addition, the exhaust pipe of the current CCFL is an extension of its own glass tube (see Figure 3). Due to the obstruction of the cold cathode, the exhaust rate is greatly reduced and the exhaust quality is affected; at the same time, because a cold cathode of the lamp is enclosed In the exhaust pipe, the cathode high-voltage discharge degassing and activation methods commonly used in the exhaust production process cannot be adopted

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