KR20070050123A - Sealing method of fluorescent lamp of cold cathode fluorescent lamp manufacturing apparatus - Google Patents

Abstract

The present invention relates to a fluorescent lamp sealing method of a fluorescent lamp manufacturing apparatus for CCFL, and more particularly, to the CCFL for injecting reducing gas into the glass tube to prevent oxidation of the electrode during the sealing process in the process of manufacturing the fluorescent lamp for CCFL A fluorescent lamp sealing method of a fluorescent lamp manufacturing apparatus.

That is, the present invention provides a sealing method of a fluorescent lamp, comprising the steps of: 1) inserting an electrode into an inner end of a glass tube, injecting a reducing gas and then sealing; 2) inverting the glass tube; 3) inserting an electrode into the other end of the inner glass tube and injecting a reducing gas; 4) It relates to a fluorescent lamp sealing method of the fluorescent lamp manufacturing apparatus for CCFL, characterized in that the step of sealing the other end of the glass tube.

CCFL Fluorescent Lamp Manufacturing Equipment, Sealing, Fluorescent Lamp, Reducing Gas, Electrode, Oxidation

Description

SEALING METHOD OF FLUORESCENT LAMP OF COLD CATHODE FLUORESCENT LAMP MANUFACTURING APPARATUS}

1 is a schematic cross-sectional view showing the structure of a cold cathode fluorescent lamp.

2A to 2C are process diagrams illustrating a sealing and sealing process of a cold cathode fluorescent lamp.

Figure 3 is a flow chart illustrating a fluorescent lamp sealing method of the fluorescent lamp manufacturing apparatus for CCFL according to an embodiment of the present invention.

Figure 4 is a schematic diagram showing the movement path of the glass tube during the fluorescent lamp sealing of the fluorescent lamp manufacturing apparatus for CCFL.

<Description of Symbols for Main Parts of Drawings>

111: glass tube 112: electrode

117: bead

The present invention relates to a fluorescent lamp sealing method of a fluorescent lamp manufacturing apparatus for CCFL, and more particularly, to the CCFL for injecting reducing gas into the glass tube to prevent oxidation of the electrode during the sealing process in the process of manufacturing the fluorescent lamp for CCFL A fluorescent lamp sealing method of a fluorescent lamp manufacturing apparatus.

In general, liquid crystal display (LCD) devices that are spotlighted in flat panel display devices include a backlight device that provides a separate light source because they are non-light emitting devices that do not emit light by themselves.

The general requirements of such a backlight are high brightness, high efficiency, uniformity of brightness, long life, thinness, low weight, and low cost. In the case of notebook PCs, high efficiency long life lamps are required to reduce power consumption, and backlights for monitors and TVs require high brightness.

As the backlight, a cold cathode fluorescent lamp (CCFL) is disposed and a phosphor has been conventionally used. CCFLs are classified into an edge light using a light guide plate and a direct light arranged in a plane according to the arrangement of the light source on the display surface.

Here, the general structure of the cold cathode fluorescent lamp 10, as shown in Figure 1, is provided with two electrodes, the long glass tube 11 and the anode 12 and the cathode 13 attached to both ends thereof, Two electrodes are connected to each other by a lead 16 formed at both ends of the glass tube 11. In addition, a fluorescent substance 14 is coated on the inner wall of the glass tube 11, and a mixed gas such as mercury, argon, and neon is filled in the inner space 15 of the glass tube.

First, the CCFL fluorescent lamp manufacturing apparatus is composed of a bead (Bead) process, a sealing (Sealing) process, a seal-cutting (Seal-cutting) process, and manufactures a fluorescent lamp by such a various process.

Meanwhile, in the manufacturing process of the cold cathode fluorescent lamp 10, as shown in FIG. 3A, a bead process is performed to form beads 17 in the lead 16 of the electrode 12 inserted into the lamp. do.

Next, as shown in FIG. 3B, a sealing process of removing air in the glass tube 11, filling the gas, and sealing the gas is performed. In this process, the beads 17 are first inserted into one side of the glass tube 11, and a portion of the glass tube 11, that is, the outer circumferential surface of the glass tube 11 on which the beads 17 are positioned, is photographed to make the beads 17. Fix it. In addition, a portion of the outside of the end of the bead 17 is taken to form a space into which a mercury getter (H) is introduced.

Next, after the glass tube 11 is inverted, the beads 17 are inserted into the opposite sides and heated to completely seal the glass tube 11.

Thereafter, after completing another process such as filling the gas into the glass tube 11, the fluorescent lamp is inverted and a seal cutting process is performed as shown in FIG. 3C. In this process, the cutting part is heated with a torch (T: torch) and then the cutting part is cut using a cutting wheel (W). Then, the glazing process is performed to reheat the cut portion to form a smooth curved surface.

Here, the CCFL fluorescent lamp 10 performs the process of forming the internal electrodes 12 and 13 on the electrodeless glass tube 11, and then arranges the CCFL fluorescent lamp 10 so as to overlap each other. It is connected and driven by the connection method.

However, in the conventional CCFL fluorescent lamp manufacturing apparatus, the method for sealing the fluorescent lamp is first placed the electrode 12 in one end inside the glass tube 11, and then the glass tube 11 through a reducing gas supply device (not shown) Injecting a reducing gas into the inside prevents the electrode 12 from being oxidized, and photographs the outer circumferential surface of the glass tube 11 in which the beads 17 formed in the lead 16 of the electrode 12 are positioned, thereby beading the beads 17. Was fixed.

Then, one end of the glass tube 11 is heated to be completely sealed, the glass tube 11 is inverted, and the other end of the glass tube 11 opposite side of the glass tube 11 is provided with beads 17 provided with electrodes 12 in the same manner. Fixed to (11) and sealed.

However, when one end of the glass tube 11 is sealed, a reducing gas is injected into the glass tube 11 to prevent oxidation of the electrode 12. However, when the other end of the glass tube 11 is sealed, the reducing gas is sealed. Since the electrode 12, which is located at the other end of the glass tube 11, is not sufficiently exposed to the reducing gas, the lifetime of the fluorescent lamp is reduced.

The present invention has been made to solve the above-mentioned problems, the object of the fluorescent lamp for CCFL to extend the life of the fluorescent lamp by sequentially supplying the reducing gas to both sides of the glass tube during the sealing process at both ends of the glass tube It is to provide a fluorescent lamp sealing method of the manufacturing apparatus.

In order to achieve the above object, the present invention provides a sealing method of a fluorescent lamp,

1) inserting an electrode into an inner end of the glass tube, injecting a reducing gas and then sealing; 2) inverting the glass tube; 3) inserting an electrode into the other end of the inner glass tube and injecting a reducing gas; 4) sealing the other end of the glass tube, by placing a bead provided in the lead of the electrode on one end of the glass tube and then sealing, and placing the bead with the lead of the electrode on the other end inside the glass tube and then sealing In the process of treatment, it is preferable to supply the reducing gas to one end and the other end of the glass tube to prevent oxidation of the electrode.

Hereinafter, a fluorescent lamp sealing method of a fluorescent lamp manufacturing apparatus for CCFL of the present invention will be described with reference to the accompanying drawings, an embodiment as follows.

In the fluorescent lamp sealing method of the CCFL fluorescent lamp manufacturing apparatus according to an embodiment of the present invention, inserting an electrode into one end of the glass tube as shown in Figure 3 and 4 (S200) and injecting a reducing gas (S210), sealing the one end of the glass tube (S220), inverting the glass tube (S230), inserting an electrode to the other end of the glass tube (S240), and injecting a reducing gas (S250) And sealing the other end of the glass tube (S260).

Inserting an electrode into one end of the glass tube (S200) is performed after a bead process for forming a bead 117 in a lead (not shown) portion of the electrode 112, the electrode 112 of the The bead 117 formed in the lead portion is a step of positioning the proper position in the glass tube 111 once.

Injecting the reducing gas (S210) from the upper end of the glass tube 111 to the reducing gas supply device (not shown) to prevent oxidation of the electrode 112 located at one end of the glass tube 111 Injecting the reducing gas into the glass tube 111.

Sealing the one end of the glass tube (S220) allows the bead 117 fixed to the lead of the electrode 112 to be fixed to the glass tube 111 by taking the outer peripheral surface of the glass tube 111 and the bead 117 It is a step of sealing one end of the glass tube 111 by forming and heating a space where a mercury getter (Hg Getter: not shown in the drawing) is introduced by taking a portion of the outside of the glass tube 111, which is the end of the glass tube.

Inverting the glass tube (S230) is a step in which one end of the glass tube 111 is rotated by 180 ° to seal the other end of the glass tube 111 on the opposite side.

Inserting the electrode to the other end of the glass tube (S240) is performed after the bead process to form a bead 117 in the lead portion of the electrode to be the same as the step of inserting the electrode into one end of the glass tube (S200), The bead 117 formed on the lead portion of the electrode 112 is positioned at the other end of the glass tube 111 at an appropriate position.

Injecting the reducing gas (S250) is the same as the step of injecting the reducing gas (S210) of the glass tube 111 to prevent oxidation of the electrode 112 located at the other end of the glass tube 111 Injecting the reducing gas into the glass tube 111 into the reducing gas supply device at the top.

At this time, since the reducing gas supply device is located at the top of the glass tube 111, when the glass tube 111 is inverted, the other end of the glass tube 111 to be sealed is moved to the reducing gas supply device.

Sealing the other end of the glass tube (S260) is partially the same as the step of sealing the one end of the glass tube (S220) and the bead 117 fixed to the lead portion of the electrode 112 is the glass tube 111 of It is a step of sealing the other end of the glass tube 111 by dipping the outer circumferential surface to be fixed to the glass tube 111 and filling the gas into the glass tube 111 and then heating the other end of the glass tube 111.

Furthermore, as shown in FIG. 4, the CCFL fluorescent lamp manufacturing apparatus includes a sealing process machine that performs sealing of the glass tube 111, and is divided into three parts, and a glass tube end sealing process machine that seals one end of the glass tube 111. A) and the glass tube sealing process of the other end of the glass tube 111 inverted in the inverted process machine (B) and the inverted process machine (B) to reverse the glass tube 111 carried out from the glass tube one end sealing process machine (A) The other end sealing process machine (C) is comprised.

Here, the glass tube one end sealing process (A) and the other end of the glass tube sealing process (C) for each position of the electrode 112 supply, glass tube 111 supply, electrode 112 insertion, reducing gas supply and sealing treatment, Glass tube 111 is discharged through the process.

Furthermore, the glass tube one end sealing process machine (A) is carried into the glass tube 111 cut to a suitable length into the process machine and supplies the beads 117 formed in the lead of the electrode 112 to one end inside the glass tube 111 is carried. .

The bead 117 formed on the lead of the electrode 112 is supplied to the other end of the glass tube 111 inverted in the glass tube other end sealing process (C), and the sealing is completed, the glass tube 111 is discharged to the outside of the process.

And a loading portion (not shown in the drawing) and the unloading portion for loading and unloading the glass tube 111 at one end of each of the glass tube end sealing process (A) and the other end of the glass tube other end sealing process (C) Unloading: not shown in the drawing.

The fluorescent lamp sealing method of the CCFL fluorescent lamp manufacturing apparatus of the present invention is a reducing gas for preventing the oxidation of the electrode in the process of sealing by placing the electrode is subjected to the lead process in one end and the other end of the glass tube in the sequential sealing process. As it is injected into one end and the other end of the glass tube, it is possible to increase the oxidation rate of the electrode to extend the life of the fluorescent lamp.

Claims (2)

In the sealing method of a fluorescent lamp, 1) inserting an electrode into an inner end of the glass tube, injecting a reducing gas and then sealing; 2) inverting the glass tube; 3) inserting an electrode into the other end of the inner glass tube and injecting a reducing gas; 4) The fluorescent lamp sealing method of the fluorescent lamp manufacturing apparatus for CCFL, characterized in that the step of sealing the other end of the glass tube. The method of claim 1, The injection of reducing gas into the other end of the glass tube carried out in step 3) is performed in the same manner as the injection of reducing gas into one end of the glass tube carried out in step 1). Way.

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