KR100865913B1 - Cold cathode fluorescent lamp and manufacturing method of it by precision plating process - Google Patents

Abstract

A cold cathode fluorescent lamp and a manufacturing method thereof are provided to enhance the cohesive power of the plating layer by forming the plating layer with the water gilding manner. A method for manufacturing a cold cathode fluorescent lamp includes the step of tube fixing stage fixing a fluorescent tube on a jig(S100); the step of surface modification stage forming the concavo-convex on the surface of the fluorescent tube(S200); the step of first washing step washing the fluorescent tube(S300); the step of removing the distilled water(S400); the step of coherent layer coating stage coating the concavo-convex exterior with the titanium dioxide(S500); the step of coherent layer thermal processing step heating up the coherent layer and enhancing the adhesive force(S600); the step of catalyst layer coating stage coating the upper side of the coherent layer with the catalyst layer(S700); the step of catalyst layer exposure step irradiating the ultra violet(UV) and exposing the catalyst layer(S800); the step of coating layer formation step forming the plating layer on the catalyst layer upper side through the water gilding(S900); the step of second washing step washing the plating liquid(S1000); the step of plating layer thermal processing step heating up the plating layer(S1100); and the step of lamp isolation step separating the cold cathode fluorescent lamp from the jig(S1200).

Description

Cold cathode fluorescent lamp and manufacturing method of it by precision plating process

1 is an internal configuration diagram showing a configuration of a cold cathode fluorescent lamp according to the prior art.

2 is an internal configuration showing an internal configuration of a cold cathode fluorescent lamp according to the present invention.

Figure 3 is a longitudinal sectional view showing a change in appearance of the cold cathode fluorescent lamp produced according to the method of manufacturing a cold cathode fluorescent lamp according to the present invention.

Figure 4 is a schematic view showing a method of manufacturing a cold cathode fluorescent lamp according to the present invention.

Figure 5 is a perspective view showing the appearance of the jig used when manufacturing a cold cathode fluorescent lamp according to the present invention.

Explanation of symbols on the main parts of the drawings

100. Fluorescent tube 110. Fluorescent

200. Plating layer 210. Unevenness

220. Adhesion layer 230. Catalyst layer

300. Jig 320. Receiving groove

 C. Conveyor Belt R. roller

S100. Tube fixing step S200. Surface modification stage

S300. First washing step S400. Drying stage

S500. Adhesive layer spreading step S600. Intimate layer heat treatment step

S700. Catalyst layer application step S800. Catalyst layer exposure step

S900. Plating layer forming step S1000. 2nd washing stage

S1100. Plating layer heat treatment step S1200. Ramp Separation Step

The present invention relates to a cold cathode fluorescent lamp in which a base is formed by a precision plating process and a method of manufacturing the same.

In LCD monitors, which are rapidly spreading in recent years, since LCDs are not self emitting devices, a light source called a backlight is required. As this light source, a cold cathode fluorescent lamp is used.

The cold cathode fluorescent lamp is configured to emit light by stimulating a fluorescent material applied inside the lamp by a light emission method of gas discharge.

Conventional cold cathode fluorescent lamps have long lifespan from 6mA to 50,000 hours, high efficiency and high brightness performance, and can be manufactured in a compact size. The diameter and length of the lamp can be freely adjusted and the shape can be easily changed. Due to the advantages of showing a warm color tone as well as high color rendering, it is widely used as a backlight installed in liquid crystal digital devices such as LCD, liquid crystal TV.

Referring to the configuration of a cold cathode fluorescent lamp according to the prior art with reference to Figure 1, the cold cathode fluorescent lamp 1 is a fluorescent tube 10 coated with a fluorescent material therein, and the fluorescent tube 10 A discharge gas (not shown) enclosed therein, an electron-emitting member 20 installed at the left / right side of the fluorescent tube 10 to discharge when the power is supplied, and protruded to an outer end of the fluorescent tube 10. And a lead 30 for supplying power to the fluorescent lamp 1 and provided between the lead 30 and the electron emitting member 20 to transfer the power delivered to the lead 30 to the electron emitting member 20. And a base 50 coupled to the left and right ends of the outer circumferential surface of the fluorescent tube 10.

The discharge gas is composed of mercury (Hg) and inert gas vapor, and the fluorescent material is composed of a phosphor, an adhesive, and aluminum oxide (Al ₂ O ₃ ) to the paste (Paste) fluorescent tube 10 It is applied to the inner surface.

The electron-emitting member 20 is fixed to the electrode 40 by a fixing member such as soldering or riveting, the electrode 40 is made of copper.

In addition, the base 50 is coupled to the electrode 40 by soldering in a separately molded state so that the base 50 is not separated from the end of the fluorescent tube 10.

However, the prior art of the above configuration has the following problems.

That is, the base 50 is molded into a separate component and coupled to the electrode 40 by soldering. Therefore, there is a problem that the productivity is lowered because the number of steps in the manufacture of the cold cathode fluorescent lamp (1).

In addition, the base 50 has a problem in that the defective rate increases because the bonding force with the electrode 40 is weak and easily separated.

In addition, since the soldering work is performed by a worker by hand, there is a problem that a huge loss occurs due to breakage of the fluorescent tube 10 due to careless handling.

Accordingly, an object of the present invention for solving the above problems is to provide a cold cathode fluorescent lamp by a precision plating process to improve the quality by the plating layer formed by the wet plating method to play a role corresponding to the base. .

It is another object of the present invention to provide a method for manufacturing a cold cathode fluorescent lamp which improves productivity and quality by continuously automating every step of manufacturing the cold cathode fluorescent lamp.

Method for producing a cold cathode fluorescent lamp by the precision plating process of the present invention for achieving the above object, the tube fixing step of seating and fixing the fluorescent tube of the semi-finished state in the jig; A surface modification step of forming irregularities by modifying the surface of the fluorescent tube; A first washing step of washing the fluorescent tube having the irregularities formed therein with distilled water; A drying step of removing distilled water remaining on the outer surface of the fluorescent tube; An adhesion layer coating step of applying liquid titanium dioxide to the uneven surface; An adhesive layer heat treatment step of increasing adhesion by heating the liquid adhesion layer; A catalyst layer coating step of applying a catalyst layer on an upper surface of the adhesion layer; A catalyst layer exposure step of exposing the catalyst layer by irradiating UV; A plating layer forming step of forming a plating layer on the upper surface of the catalyst layer by a wet plating method; A second washing step of washing the plating liquid buried in the plating layer; A plating layer heat treatment step of heating the plating layer to increase adhesion of the plating layer; And a lamp separation step of separating the cold cathode fluorescent lamp manufactured by completing the plating layer heat treatment step from the jig.

The surface modification step may be a process of forming irregularities only on the outer surface of the fluorescent tube exposed to the outside of the jig.

The adhesion layer applying step is characterized in that the process of diffusion of titanium dioxide on the surface of the fluorescent tube.

In the catalyst layer coating step, the catalyst layer is characterized in that the palladium salt is applied.

The plating layer forming step includes an electroless plating process for forming an electroless plating layer on the upper surface of the catalyst layer, and an electroplating process for forming an electroplating layer on the upper surface of the electroless plating layer.

The electroless plating process and the electroplating process, it characterized in that the plating of any one of nickel or copper.

The method for manufacturing a cold cathode fluorescent lamp according to the present invention is characterized in that the adhesion layer, the catalyst layer and the plating layer are sequentially laminated on a part of the outer surface of the fluorescent tube, and the plating layer is formed by a wet plating method.

The plating layer is characterized in that it is formed by sequentially performing electroless plating and electroplating.

The outer surface of the fluorescent tube is characterized in that the irregularities for increasing the adhesion of the fluorescent tube and the adhesion layer is formed.

The unevenness is characterized in that the hydrofluoric acid (HF) is formed in contact with the outer surface of the fluorescent tube.

The present invention is a cold cathode fluorescent lamp by a precision plating process that discharges and emits light with a power source supplied from the outside, on one side of the outer surface of the cold cathode fluorescent lamp, a plating layer formed by a wet plating method, so that the plating layer can be formed And a catalyst layer serving as a catalyst, an adhesion layer for bringing the catalyst layer and the outer surface of the fluorescent lamp into close contact, and an unevenness to increase adhesion between the adhesion layer and the outer surface of the cold cathode fluorescent lamp.

The unevenness is formed by polishing or etching.

According to the present invention having such a configuration, since the mass production of the cold cathode fluorescent lamp is possible, the productivity is improved and the defect rate is lowered.

Hereinafter, a configuration of a cold cathode fluorescent lamp according to the present invention will be described with reference to FIG. 2.

2 shows an internal configuration of a cold cathode fluorescent lamp according to the present invention. As shown in the figure, the cold cathode fluorescent lamp is a fluorescent tube 100 filled with a mixed gas such as mercury, argon and neon as a discharge medium, and a plating layer formed by being plated on the outer surface of both ends of the fluorescent tube 100 ( 200) the appearance is formed.

Both ends of the fluorescent tube 100 are hermetically bonded to each other, and a fluorescent agent 110 is coated on an inner wall of the fluorescent tube 100. An electrode (not shown) is provided in the fluorescent tube 100 to allow power supplied from the outside to be applied into the fluorescent tube 100, and detailed description of the interior of the fluorescent tube 100 will be omitted.

The plating layer 200 is formed by plating nickel (Ni) on the outer circumferential surface of the fluorescent tube 100 by wet plating. The plating layer 200 is formed at a predetermined length in the center direction at both ends of the plating layer 200, and the base (Fig. The same as the reference numeral 50 of 1).

The plating layer 200 serves to allow the power supplied from the outside to be delivered to the fluorescent tube 100.

Accordingly, the plating layer 200 may be electrically connected to an electrode (not shown) to transfer power applied from the outside into the fluorescent tube 100.

The unevenness 210, the adhesion layer 220, and the catalyst layer 230 are formed inside the plating layer 200, and the roles of the unevenness 210, the adhesion layer 220, and the catalyst layer 230 will be described in detail below. Shall be.

Hereinafter, a method of manufacturing the cold cathode fluorescent lamp will be described with reference to FIGS. 3 to 5.

Figure 3 is a longitudinal cross-sectional view showing a change in appearance of the cold cathode fluorescent lamp produced according to the method of manufacturing a cold cathode fluorescent lamp according to the present invention, Figure 4 shows a method of manufacturing a cold cathode fluorescent lamp according to the present invention. A schematic diagram is shown, and FIG. 5 is a perspective view showing the appearance of a jig used when manufacturing a cold cathode fluorescent lamp according to the present invention.

As shown in these figures, the cold cathode fluorescent lamp is forced to flow by the rotation of the plurality of rollers (R) to complete the manufacture through a number of steps, the plurality of rollers (R) are spaced apart in pairs close to each other And rotate in opposite directions.

In addition, a conveyor belt (C) is provided between the rollers (R), and the jig 300 shown in FIG. 5 is seated on the upper surface of the conveyor belt (C).

Looking at the configuration of the jig 300 first, the jig 300 has a substantially rectangular parallelepiped shape, and is configured to be separated up and down based on a central portion. In the center of the jig 300, a semicircular accommodating groove 320 is recessed in the front / rear direction.

The receiving groove 320 has a size corresponding to the diameter of the fluorescent tube 100, the receiving groove 320 is configured to open when the upper and lower portions of the jig 300 is separated.

Therefore, when the upper and lower portions of the jig 300 are coupled in a state in which the plurality of fluorescent tubes 100 are seated in the receiving groove 320, the flow of the fluorescent tubes 100 is limited.

And although not shown, the jig 300 is provided with a coupling part to be coupled to the conveyor belt (C) because the movement should be limited in the state seated on the conveyor belt (C), the jig (300) receiving groove ( The inner peripheral surface of the 320 and the outer peripheral surface of the fluorescent tube 100 are preferably in contact with the surface so that the locking device can be blocked from the outside.

Therefore, the jig 300 is seated in the receiving groove 320 in the state in which the jig 300 is fixed to the conveyor belt C by the coupling part, and then the locking device of the jig 300 is used. When the upper and lower parts are combined, the jig 300 may move together with the conveyor belt C when the roller R rotates.

In addition, the jig 300 is formed of a flexible material having heat resistance and chemical resistance. For example, it is preferably formed of Tefron. Teflon is also an insulator.

Therefore, while the fluorescent tube 100 is accommodated inside the jig 300, the jig 300 may be prevented from being damaged and deformed during a plurality of steps to be described below.

In addition, the jig 300 is formed of an insulator because the plating is blocked on the outer surface of the fluorescent tube 100 located inside the receiving groove 320 in the wet plating step of the cold cathode manufacturing method. This is to be plated only on the outer surface of the fluorescent tube 100 exposed to the outside.

To this end, it is apparent that the length of the jig 300 before and after corresponds to the length of the fluorescent tube 100 minus the length of the plating layer 200 to be formed.

Next, a method of manufacturing the cold cathode fluorescent lamp will be described sequentially.

First, the inner space of the fluorescent tube 100 is sealed, that is, the fluorescent lamp of the semi-finished state is seated in the receiving groove 320 and then to combine the upper and lower parts of the jig 300 by using the locking device. (Tube fixing step: S100)

At this time, the jig 300 is fixed so as not to be separated from the upper surface of the conveyor belt (C) by the coupling portion.

After the roller (R) is rotated to move the conveyor belt (C) to the right direction, the jig 300 and the fluorescent tube 100 is also moved to the right, jig 300 from the receiving groove 320 Surface modification step (S200) for modifying the outer surface of the fluorescent tube 100 exposed to the outside is carried out.

The surface modification step is a process of modifying the conveyor belt (C) in contact with the hydrofluoric acid (HF) to form the irregularities (210, see the second view from above in FIG. 3) on the outer surface of the fluorescent tube 100, Concave-convex 210 formed on the outer surface of the fluorescent tube 100 is a configuration for increasing the adhesion of the adhesive layer 220 mentioned above.

In addition, the unevenness 210 may be formed in various ways. That is, since the concave-convex 210 plays only a role of forming the adhesion layer 220, the concave-convex 210 may be formed by polishing within a range that does not reduce the durability of the fluorescent tube 100.

The fluorescent tube 100 whose outer surface is modified through the surface modification step S200 is subjected to a first washing step S300 for removing hydrofluoric acid (HF) from the outer surface. In the first washing step, distilled water is preferably used.

The fluorescent tube 100 in which the hydrofluoric acid is removed by distilled water in the first washing step is distilled water is evaporated and dried while passing through the drying chamber in a state accommodated in the jig 300 (drying step: S400).

Since the conveyor belt (C) is moved to the right to form an adhesive layer 220 on the outer side of the unevenness (210) (adhesive layer coating step: S500). The adhesion layer 220 is formed by reacting titanium dioxide with the outer surface of the fluorescent tube 100 on which the unevenness 210 is formed.

That is, the adhesion layer 220 is a titanium diffusion is attached to the surface of the modified fluorescent tube 100, a configuration for helping the adhesion of the aforementioned catalyst layer 230.

In addition, in the adhesion layer applying step (S500), the adhesion layer 220 is applied in a liquid state, and the adhesion layer 220 of such a liquid state is more firmly attached to the outside of the unevenness 210 of the fluorescent tube 100. The adhesive layer heat treatment step (S600) is performed to maintain the maintained state.

The adhesion layer heat treatment step (S600) is carried out for 5 to 60 minutes at a temperature of 200 ~ 350 ℃, the fluorescent tube 100 is completed, the formation of the adhesion layer 220 as shown in Figure 3 It becomes a state.

Thereafter, the catalyst layer coating step (S700) of applying the catalyst layer 230 to the upper surface of the adhesion layer 220 is performed. In the catalyst layer coating step (S700), the catalyst layer 230 is titanium dioxide and palladium salt (Pd) is applied, and the palladium salt is a catalyst so that the plating layer 200 can be formed in the plating layer forming step (S900) to be described below. Play a role.

In addition, the catalyst layer coating step (S700) is carried out under the atmosphere, wherein the atmospheric humidity is preferably 50% or less, and the state of the fluorescent tube 100 in which the formation of the catalyst layer 230 is completed is shown in FIG. Corresponds to

When the catalyst layer application step (S700) is completed, the catalyst layer exposure step (S800) is performed so that the catalyst layer 230 is more firmly attached to the adhesion layer 220. The catalyst layer exposure step (S800) is a process of activating the entire surface of the catalyst layer 230, thereby activating the catalyst layer 230 by irradiating UV to the catalyst layer 230.

On the other hand, the plating layer forming step (S900) of forming a plating layer 200 by plating a metal (preferably nickel (Ni)) by the wet plating method on the surface of the semi-finished product formed through the above steps are performed. Therefore, when the plating layer forming step (S900) is completed, the interior of the fluorescent tube 100 is configured as shown in the bottom of FIG.

In addition, the plating layer forming step S900 may be configured to include a plurality of plating processes. That is, the plating layer forming step (S900) is an electroless plating process for forming an electroless plating layer (not shown) outside the catalyst layer 230, and an electroplating process for forming an electroplating layer (not shown) outside the electroless plating layer. The process may be performed sequentially.

Looking at the plating layer forming step (S900) in more detail, it is impossible to form the plating layer 200 through the electroplating because the catalyst layer 230 does not pass through electricity.

Therefore, after the electroless plating is formed on the upper surface of the catalyst layer 230 to form an electroless plating layer (not shown), the electroplating layer can be formed by applying electricity to the electroless plating layer to perform electroplating. .

At this time, the electroplating layer and the electroless plating layer may be formed of any one of nickel (Ni) or copper (Cu), and nickel (Ni) was applied in the embodiment of the present invention.

After the plating layer forming step (S900), the second washing step (S1000) for removing the plating solution on the outer surface of the fluorescent tube 100 is in progress, the fluorescent tube 100 washed by the second washing step (S1000). ) Is subjected to the plating layer heat treatment step (S1100).

The plating layer heat treatment step (S1100) is a step for providing a close adhesion between the plating layer 200, the catalyst layer 230, and the adhesion layer 220.

When the plating layer heat treatment step (S110) is completed, the manufacture of the cold cathode fluorescent lamp is completed, as shown in Figure 3 has an internal structure as shown in the bottom view.

Thereafter, the cold cathode fluorescent lamp accommodated in the receiving groove 320 of the jig 300 is separated from the upper / lower part of the jig 300 by releasing the locking device to separate the fluorescent lamp from the jig 300 (S1200. ) Is carried out, and the outer circumferential surface of the fluorescent lamp located inside the accommodating groove 320 can be seen that the original state in which the unevenness 210 or the plating layer 200 is not formed at all is maintained.

The scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention may be made by those skilled in the art within the above technical scope.

For example, in the embodiment of the present invention, the jig is configured to flow in a state seated on the upper surface of the conveyor belt, but the jig is formed as long as the length of the conveyor belt and the upper and lower surfaces of the jig to contact the roller by the conveyor belt Of course, it is possible to manufacture a cold cathode fluorescent lamp without configuring a.

As described in detail above, in the cold cathode fluorescent lamp of the present invention, there is an advantage in that the adhesion of the plating layer is increased by forming the plating layer by the wet plating method.

In addition, when the adhesion of the plating layer is increased, since the peeling of the base, which has frequently occurred in the past, is prevented in advance, durability is increased and quality is improved.

In addition, in the present invention, all steps of manufacturing the cold cathode fluorescent lamp are configured to proceed continuously.

Therefore, the productivity of the cold cathode fluorescent lamp is improved, and the production rate is reduced due to a low defect rate, thereby increasing the price competitiveness.

Claims (12)

Tube fixing step of fixing the semi-finished fluorescent tube to the jig by fixing: A surface modification step of forming irregularities by modifying the surface of the fluorescent tube; A first washing step of washing the fluorescent tube having the irregularities formed therein with distilled water; A drying step of removing distilled water remaining on the outer surface of the fluorescent tube; An adhesion layer coating step of applying liquid titanium dioxide to the uneven surface; An adhesive layer heat treatment step of increasing adhesion by heating the liquid adhesion layer; A catalyst layer coating step of applying a catalyst layer on an upper surface of the adhesion layer; A catalyst layer exposure step of exposing the catalyst layer by irradiating UV; A plating layer forming step of forming a plating layer on the upper surface of the catalyst layer by a wet plating method; A second washing step of washing the plating liquid buried in the plating layer; A plating layer heat treatment step of heating the plating layer to increase adhesion of the plating layer; And a lamp separation step of separating the cold cathode fluorescent lamp prepared by the completion of the plating layer heat treatment step from the jig. The method of claim 1, wherein the surface modification step, A method of manufacturing a cold cathode fluorescent lamp by a precision plating process, characterized in that the irregularities formed on the outer surface of the fluorescent tube exposed to the outside of the jig. The method of claim 2, wherein the adhesion layer applying step, Method of manufacturing a cold cathode fluorescent lamp by a precision plating process, characterized in that the diffusion of titanium dioxide on the surface of the fluorescent tube. The method of claim 1, wherein in the catalyst layer application step, The catalyst layer is a method of manufacturing a cold cathode fluorescent lamp by a precision plating process characterized in that the palladium salt is applied. The method of claim 1, wherein the plating layer forming step, An electroless plating process of forming an electroless plating layer on an upper surface of the catalyst layer, A method of manufacturing a cold cathode fluorescent lamp by a precision plating process comprising an electroplating process for forming an electroplating layer on the top surface of the electroless plating layer. The method of claim 5, wherein the electroless plating process and the electroplating process, Method for producing a cold cathode fluorescent lamp by a precision plating process characterized in that the plating of any one of nickel or copper. A method of manufacturing a cold cathode fluorescent lamp by a precision plating process, characterized in that the adhesion layer, the catalyst layer and the plating layer are sequentially formed on a portion of the outer surface of the fluorescent tube and the plating layer is formed by a wet plating method. The method of claim 7, wherein the plating layer, A method of manufacturing a cold cathode fluorescent lamp by a precision plating process, characterized in that formed by sequentially performing electroless plating and electroplating. The method of claim 7, wherein an uneven surface is formed on an outer surface of the fluorescent tube to increase adhesion between the fluorescent tube and the adhesion layer. 10. The method of claim 9, wherein the irregularities are formed by contacting hydrofluoric acid (HF) on the outer surface of the fluorescent tube. In the cold-cathode fluorescent lamp which discharges light by the electric power supplied from the outside, On one side of the outer surface of the cold cathode fluorescent lamp, A plating layer formed by a wet plating method, A catalyst layer serving as a catalyst to form the plating layer, An adhesion layer for bringing the catalyst layer into close contact with the outer surface of the fluorescent lamp; Cold cathode fluorescent lamp according to the precision plating process characterized in that the irregularities are provided to increase the adhesion of the adhesive layer and the outer surface of the cold cathode fluorescent lamp. The method of claim 11, wherein the unevenness, Cold cathode fluorescent lamp by precision plating process, characterized in that formed by polishing or etching.

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