Fluorescent lamp fluorescent liquid coating device

Abstract

The invention relates to a fluorescent liquid coat device of fluorescent lamp which comprises a storage device used for storing and coating the fluorescent liquid in the wall of the glass tube, a saturated vapour supply device used for supplying vapor to the storage device, to apply pressure on the fluorescent liquid fluid level of the storage device, thereby preventing the evaporation of the fluorescent liquid and the flow of outer water or air. The fluorescent liquid coat device of fluorescent lamp applies pressure on the stored fluorescent liquid level through filling saturated vapour in the storage groove, thereby preventing the evaporation of the fluorescent liquid, keeping stability of the viscocity of fluorescent liquid and improving the coating quality of the fluorescent lamp.

Description

technical field [0001] The invention relates to a fluorescent lamp coating device, in particular to a fluorescent liquid coating device for a fluorescent lamp which utilizes steam pressure to prevent the fluorescent liquid from evaporating, thereby stably maintaining the viscosity and physical properties of the fluorescent liquid for coating. Background technique [0002] In general, fluorescent lamps are broadly classified into cold cathode fluorescent lamps (CCFL: Cold Cathode Fluorescent Lamp) and external electrode fluorescent lamps (EEFL: External Electrode Fluorescent Lamp). Low and other advantages, and can be made into small fluorescent lamps, so it has been widely used as LCD backlight recently. [0003] The manufacturing process of this kind of external electrode fluorescent lamp includes: the process of coating the fluorescent liquid on the inner wall of the glass tube used to manufacture the fluorescent lamp; the process of roasting the coated fluorescent liquid;...

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Problems solved by technology

[0008] However, when the above-mentioned method is used to coat the lamp tube, if the storage tank storing the fluorescent liquid is exposed to the atmosphere, it will cause the evaporation of the fluorescent liquid or the moisture in the atmosphere will enter the fluorescent liquid, so the viscosity of the fluorescent liquid is difficult to keep stable.

[0009] Moreover, when manufacturing a fluorescent lamp, the operator needs to observe the reduction of the fluorescent liquid in the storage tank with the naked eye, and after confirming the reduced state of the fluorescent liquid, it is necessary to manually replenish the reduced fluorescent liquid, so the manufacturing process is relatively complicated.

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