Processing and manufacturing method of trace-free large-diameter cold cathode discharge lamp tube

Abstract

A processing and manufacturing method of a trace-free large-diameter cold cathode discharge lamp tube comprises the following steps: fixing an electrode; providing a glass tube, putting a discharge cup of the electrode into the glass tube from an unsealed end of the glass tube and fixing the glass tube; completely heating the outer surface of the entire glass tube by using a torch so as to soften the end to a melting state; clamping the end with a clamp so that the end is converged into a whole; continuously heating the clamped and convergent end and tempering; sealing the other end to obtain a trace-free large-diameter cold cathode discharge lamp tube; placing the trace-free large-diameter cold cathode discharge lamp tube in a tempering furnace and heating the trace-free large-diameter cold cathode discharge lamp tube to a tempering point temperature and tempering the trace-free large-diameter cold cathode discharge lamp tube.

Description

technical field [0001] The invention relates to a manufacturing method of a cold-cathode discharge lamp, in particular to a processing method for a large-diameter cold-cathode discharge lamp without contact marks. Background technique [0002] In a typical cold-cathode discharge lamp, a glass bead is usually attached to the wire of the electrode for welding with the glass tube, so that the electrode is fixed at both ends of the glass tube to form a cold-cathode tube. However, the size of the glass beads is limited, so the diameter of the corresponding glass tube is also limited. Therefore, the size of the cold cathode discharge lamp is relatively small, and the diameter of the glass tube usually cannot exceed 3mm. Such cold cathode discharge lamps have relatively low illuminance, are only suitable for backlighting light sources of liquid crystal displays, and cannot be used for lighting appliances requiring high illuminance. If it is barely used in high-illuminance lightin...

AI Technical Summary

Problems solved by technology

First, the above-mentioned procedure of fusing the short glass tubes to the long glass tubes can only be performed manually and cannot be replaced by machinery, which makes the production efficiency of neon tubes poor and cannot be mass-produced

Second, the short glass tube is fused to the two ends of the long glass tube, which will form obvious joint marks. Such joint marks will affect the appearance and may also cause the problem of insufficient stress intensity.

Third, the process of fusing the short glass tube to the two ends of the long glass tube is performed manually, so the long glass tube will be limited, otherwise the craftsman who performs the manual fusion operation may not be able to carry out the manual fusion operation smoothly

Therefore, even if the above-mentioned neon tube changes the filling gas composition to make its spectrum meet the general lighting requirements, it cannot be mass-produced and cannot meet the needs of lighting appliances.

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