Fluorescent material coating apparatus and method of coating fluorescent substance using the same

Abstract

There is provided a fluorescent material coating apparatus for a fluorescent lamp. The fluorescent material coating apparatus includes a cassette on which a plurality of glass tubes are detachably mounted, a delivery member having a delivery chamber communicating with first ends of the glass tubes, a negative pressure generating unit for allowing fluorescent solution to be drawn into the glass tubes by generating a negative pressure in the glass tubes communicating with the delivery chamber by lowering the pressure of the delivery chamber, a dry air supplying unit for supplying dry air to the delivery chamber to dry the fluorescent solution applied on inner surfaces of the glass tubes, a solution tank containing the fluorescent solution and disposed below the glass tubes mounted on the cassette, and a moving unit for allowing lower end portions of the glass tubes mounted in the delivery chamber to be dipped into the fluorescent solution contained in the solution tank.

Description

technical field [0001] The present invention relates to a fluorescent substance coating device for manufacturing fluorescent lamps and a coating method using the device, in particular to a method for simultaneously coating fluorescent liquid on the inner surfaces of at least two glass tubes for fluorescent lamps in a simple and quick manner, and can A fluorescent material coating device and a coating method thereof for drying coated fluorescent liquid at a uniform drying temperature. 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). Compared with the cold cathode fluorescent lamp, the external electrode fluorescent lamp has the characteristics of good luminous quality, long lamp life and low cost of use, and can be made into a pocket-sized structure, so it is often used as the backligh...

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Problems solved by technology

[0010] However, the above-mentioned rotary coating method can only install a small amount of glass tubes on a disk-shaped stage with limited size, that is, 3-5 glass tubes, and complete the coating through processes such as coating fluorescent liquid and drying. process

Therefore, not only is it difficult to mass-produce fluorescent lamps, but it is also necessary for the operator to load the glass tubes into the stage one by one and remove the glass tubes one by one after the coating is completed.

Therefore, not only the operation process is complicated, but also there are problems such as the time required for inserting and taking out the glass tube is too long.

[0011] In particular, since after the inner surface of the glass tube is coated with fluorescent liquid, only hot air is supplied to the inside of the glass tube when drying the coating, which results in a large temperature difference between the inner and outer surfaces of each glass tube.

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