KR100917298B1 - Frame and manufacturing method for fixing light emitting device of back light - Google Patents

Abstract

The present invention relates to a frame for fixing a backlight of a liquid crystal display (LCD), comprising: a frame on which one side of a power terminal unit receives power from the outside; At least one connection part formed in the frame and connected to and supported by one or more backlight electrodes; And a wiring pattern part plated on the frame such that the at least one connection part and the power supply terminal part are electrically connected to each other.

On the other hand, the manufacturing method of the frame for fixing the backlight of the liquid crystal display according to the present invention, the frame forming step of injection molding the frame formed with the power supply terminal portion and one or more connection portion using the first mold; A plating preventing member forming step of injection-forming a plating preventing member in a non-plating treatment portion of the wiring pattern portion which electrically connects at least one connection part and a power terminal part in the frame by using a second mold frame; A plating process in which the plating preventing member plate the injection molded frame; And a plating preventing member removing process of removing the plating preventing member by immersing the plated frame in a removing liquid that reacts with the plating preventing member.

Accordingly, the wiring pattern part formed on the frame replaces the role of the electric wiring for applying power to the backlight without using a separate electrode plate and electric wiring and fixing means for fixing the electric wiring to the frame. This can simplify the process and reduce the manufacturing cost.

LCD, LCD, Panel, Plating, Pattern

Description

Manufacturing method of frame for fixing backlight of liquid crystal display device {FRAME AND MANUFACTURING METHOD FOR FIXING LIGHT EMITTING DEVICE OF BACK LIGHT}

The present invention relates to a frame for fixing a light source of an LCD backlight and a manufacturing method thereof, and more particularly, to supply power through a wiring pattern portion without providing a separate backlight driving electrical wiring and fixing means, thereby simplifying the manufacturing process. The present invention relates to a frame for fixing a light source of an LCD backlight, and a method of manufacturing the same.

In general, a liquid crystal device (LCD) refers to a device that displays an image using a property of changing a molecule's arrangement when voltage is applied among various properties of a liquid crystal.

In this case, the liquid crystal display device contains liquid crystal in a narrow gap between two thin glass substrates and applies a voltage through a transparent electrode to change the arrangement direction of molecules to pass or reflect light, thereby making it thinner than other display devices. It is characterized by low power consumption.

However, since the liquid crystal display device is a non-emissive type display device that does not emit light by itself, a separate light source is required.

Of course, there is also a reflective liquid crystal display device using a light source of the surrounding, but generally has its own light source because it is subject to a lot of restrictions on the use of the surrounding environment.

Such independent light sources are called backlights, and the backlights include EL, LED, CCFL, HCFL, etc. Among them, CCFL (Cold Cathode Fluorescent Lamp) has a long life, low power consumption, and a liquid crystal display device. It can be formed thinly and is widely used.

On the other hand, the liquid crystal display using the backlight as described above are largely classified into two types, namely the edge light method and the direct method.

Among these, the edge method is a method in which a light source is disposed on one side or both sides of an LCD panel to reflect and diffuse light rays on a light guide plate and a reflecting plate.

On the other hand, in the direct method, a light source is placed at the bottom of the liquid crystal display panel to directly illuminate the front of the panel. The light source mainly uses electroluminescence (EL), and it is easy to obtain high brightness from the surface (light emitting surface). It is suitable for application to large liquid crystal display devices such as LCD TVs.

The liquid crystal display device using the backlight of the direct type as described above includes a frame having a predetermined shape, a connection terminal provided on the frame to connect and support a backlight, and a connection portion of the connection terminal to an external backlight controller. An electrode plate or the like interconnected with the power supply.

However, in the related art, in order to electrically connect the connection portion of the connection terminal to which the backlight is connected and supported with an external backlight controller, an electrical wiring such as an electrode plate must be additionally provided, and the electrode plate or the like is fixed to the frame. It is necessary to install a separate fixing means or fixing means for.

Therefore, the related art has a problem in that the manufacturing process is complicated, such as mounting an electric wiring, an electrode plate, and the like to fix and connect a backlight to the frame one by one, and have many components.

The present invention has been proposed to solve the above problems, and an object of the present invention, without the provision of a separate backlight connection electrode plate, fastening means, etc., the wiring pattern portion is formed integrally plated on the frame all the components The present invention provides a frame for fixing a backlight of a liquid crystal display device and a method of manufacturing the same, which simplifies the manufacturing process, reduces the manufacturing cost, and freely changes the shape.

Another object of the present invention is to enable the automation of the process of forming the wiring pattern portion in the frame, it is possible to reduce the manufacturing time and manufacturing cost.

Still another object of the present invention is to reduce the manufacturing process by injection molding the connecting portion during the injection molding of the frame without separately providing the connecting portion in the frame.

The backlight fixing frame of the liquid crystal display (LCD) according to the present invention for the above object, the frame is provided with a power terminal unit for receiving power from the outside on one side; At least one connection part formed in the frame and connected to and supported by one or more backlight electrodes; And a wiring pattern part plated on the frame such that the at least one connection part and the power supply terminal part are electrically connected to each other.

Here, the connecting portion is formed integrally with the frame.

On the other hand, the manufacturing method of the frame for fixing the backlight of the liquid crystal display according to the present invention, the frame forming step of injection molding the frame formed with the power supply terminal portion and one or more connection portion using the first mold; A plating preventing member forming step of injection-forming a plating preventing member in a non-plating treatment portion of the wiring pattern portion which electrically connects at least one connection part and a power terminal part in the frame by using a second mold frame; A plating process in which the plating preventing member plate the injection molded frame; And a plating preventing member removing process of removing the plating preventing member by immersing the plated frame in a removing liquid that reacts with the plating preventing member.

The plating preventing member is made of a water-soluble polymer material, the removal liquid is made of water.

Wherein the water-soluble polymer material is made of polyvinyl alcohol (PVA).

Meanwhile, the plating preventing member is made of a hydrolyzable polymer material, and the removing solution is made of either an alkaline solution or an acid solution.

Wherein the hydrolyzable polymer material is made of polylactic acid resin.

On the other hand, the alkaline solution consists of at least one of sodium hydroxide solution or potassium hydroxide solution.

Meanwhile, the plating process uses any one or more of electroplating or metalizing.

According to the present invention having the above-described configuration, since the wiring pattern portion for driving the backlight is formed on the frame, the wiring pattern portion formed on the frame does not need to have a separate electrode plate and fixing means, and thus serves as an electrical wiring. By replacing the simplification and manufacturing costs can be reduced.

In addition, the present invention can achieve the effect of reducing the manufacturing time and manufacturing cost by enabling the automation of the process of forming the wiring pattern portion in the frame.

In addition, after the plating prevention member is plated the injection molded frame, the plating prevention member is removed by immersing in the removal liquid reacting with the plating prevention member, so that the plating process can be automated, and the manufacturing process of the product The effect can be simplified.

In addition, when the plating prevention member is formed on the non-plating treatment part of the frame, injection molding is performed in a pre-fabricated mold frame, and the boundary between the plated part of the wiring pattern part and the non-plating treatment part is clearly distinguished, thereby preventing short circuit. have.

In addition, by integrally injection-molding the connecting portion in the frame, it is possible to omit the step of separately providing a connecting portion provided with a metal terminal for coupling, thereby reducing the manufacturing process.

Hereinafter, the configuration of the present invention will be described with reference to the accompanying drawings.

Prior to this, terms used in the present specification and claims should not be construed in a dictionary sense, and the inventors may properly define the concept of terms in order to explain their invention in the best way. It should be construed as meaning and concept consistent with the technical spirit of the present invention.

Therefore, the configuration shown in the embodiments and drawings described herein are only preferred embodiments of the present invention, and do not represent all of the technical spirit of the present invention, various equivalents that may be substituted for them at the time of the present application It is to be understood that variations may exist.

1 is an exploded perspective view illustrating a state in which a backlight fixing frame of a liquid crystal display according to the present invention is coupled to a liquid crystal display, and FIG. 2 is a plan view illustrating a backlight fixing frame of the liquid crystal display according to the present invention.

3 is a partial plan view illustrating a state in which a connecting portion is coupled to a backlight fixing frame of the liquid crystal display according to the present invention, and FIG. 4 is a backlight portion of the holding part of the backlight fixing frame of the liquid crystal display according to the present invention. Partial bottom perspective view showing a fixed appearance.

1 to 4, the backlight fixing frame 100 of the liquid crystal display device 300 according to the present invention is a backlight fixing frame of the liquid crystal display device (LCD), one side of the power supply from the outside A frame 100 on which an applied power terminal unit 60 is formed; At least one connection part 30 formed in the frame 100 and connected to and supported by the + electrode 202 or the-electrode 204 of at least one backlight 200; And a wiring pattern part 10 formed on the frame 100 so as to electrically connect the at least one connection part 30 and the power supply terminal part 60 to each other.

Here, the one or more connection parts 30 are integrally formed with the frame 100.

Meanwhile, in the method of manufacturing the backlight fixing frame 100 of the liquid crystal display according to the present invention, the injection molding of the frame 100 on which the power supply terminal 60 and the at least one connection part 30 are formed using the first mold frame is performed. Frame forming step (S10); An injection molding member is formed on the non-plating treatment part 20 of the wiring pattern part 10 which electrically connects one or more connection parts 30 and the power supply terminal part 60 to each other in the frame 100 by using the second mold frame. Plating prevention member forming process (S20); Plating process (S30) for plating the frame 100, the plating prevention member is injection molded; And a plating preventing member removing process (S40) of removing the plating preventing member by immersing the plated frame 100 in the removal liquid reacting with the plating preventing member.

Hereinafter, each component of the present invention will be described.

Prior to the description of the components of the present invention, the backlight 200 coupled to the backlight fixing frame 100 of the LCD will be described.

The backlight 200 is a fluorescent lamp that is turned on at a low temperature without heating the filament, and the positive electrode 202 and the negative electrode 204 are formed at both ends of the closed glass tube, and have a “U” shape or a “one” shape. ) ”Shape may be used, but in the embodiment of the present invention,“ U ”shape is used.

In addition, the inside of the glass tube of the backlight 200 is filled with a certain amount of a mixed gas of mercury, argon, neon, etc., the inner surface of the glass tube has the same structure and principle as a general fluorescent lamp coated with a phosphor.

Here, EL, LED, CCFL, HCFL and the like can be used as the light source of the backlight 200, but preferably a CCFL, that is, a cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp) that can be formed thin and long life ).

In this case, the + electrode 202 and the-electrode 204 are connected to the wiring pattern portion 10 of the frame 100 through the connection portion 30 to be supplied later.

The frame 100 for fixing the backlight 200 of the liquid crystal display according to the present invention includes a frame 100, a power supply terminal unit 60, a connection unit 30, a wiring pattern unit 10, and the like.

The frame 100 is installed on one side of the liquid crystal display to fix and support the components, and one side of the frame 100 + power supply terminal 62 for receiving power from an external backlight controller (not shown). And a power supply terminal portion 60 including a power supply terminal portion 64.

Here, the material of the frame 100 may be an inorganic material such as ceramics, glass, etc., in addition to synthetic resins such as thermoplastic resins, thermosetting resins, and the like. Preferably, the heat resistance and thermal swelling coefficient are close to metals over a wide temperature range. , A polyester-based liquid crystal polymer having almost the same elasticity as the metal film is used.

As described above, the frame 100 connects and supports the plurality of backlights 200 so that light generated from the backlights 200 is effectively irradiated to the liquid crystal display, and is preferably shown in FIG. 1. It is mounted on one end of the panel of the liquid crystal display device provided in a square shape, is formed of a “one” shape, and is formed by injection molding by the first mold frame.

Of course, the shape of the frame 100 is not necessarily limited to a “one” shape, and may be variously modified according to the shape of one end of the panel of the liquid crystal display device.

That is, when the LCD is circular, the frame 100 may be provided in the shape of an arc.

On the other hand, the connection part 30 is provided in one or more frames 100, and connects and supports the + electrode 202 or the-electrode 204 of the one or more backlights 200, one backlight 200 for this purpose A pair of connecting portions 30 are provided to correspond to the + electrode 202 or the-electrode 204 of FIG.

That is, the pair of connection parts 30 supply power to the backlight 200 by connecting and supporting the + electrode 202 or the-electrode 204 of one backlight 200, respectively.

Here, the connection part 30 is integrally injection molded with the frame 10 by a frame forming step (S10) described later.

The frame 100 is inserted into the body of the backlight 200 to prevent the flow of the guide portion is integrally formed, the connection portion 30 supports the body of the backlight 200 is inserted and guided by the guide portion The holding part 32 for preventing a flow is provided.

Herein, the connection part 30 is provided with a connection hole 34 for connecting and supporting the electrodes 202 and 204 of the backlight 200.

In addition, the gripping portion 32 and the connection port 34 is preferably fitted to support the electrode of the backlight 200 and the backlight 200 formed in the shape of a rod.

In addition, the connecting portion 30 is plated by the plating process of the present invention, except for the grip portion 32, all parts are electrically connected to the wiring pattern portion 10 of the frame to be described later.

Meanwhile, a wiring pattern for driving the backlight 200 in the frame 100 by interconnecting the connection part 30 with the + power terminal 62 and the-power terminal 64 provided on one side of the frame 100. The part 10 is plated.

Accordingly, when power is applied to the + power terminal 62 and the −power terminal 64 of the frame 100 on which the wiring pattern unit 10 is plated from an external backlight 200 lighting controller (not shown), Power is supplied to the backlight 200 through the connection part 30 formed in the frame 100.

Here, the wiring pattern part 10 is a patterned circuit for electrically connecting one or more connection parts 30 fixed to the frame 100 with the + power supply terminal 62 and the-power supply terminal 64, respectively. .

As a result, the + electrode 202 and the-electrode 204 of each backlight 200 are respectively connected to the pair of connecting portions 30 with corresponding polarities, and the pair of connecting portions 30 are connected to the wiring pattern portion ( 10) is connected to the + power supply terminal 62 and the-power supply terminal 64 having a corresponding polarity, respectively, to receive power from the lighting controller of the external backlight 200 controller.

On the other hand, the manufacturing process of the frame 100 for fixing the backlight 200 of the liquid crystal display according to the present invention configured as described above is as follows.

First, the frame injection process (S10) refers to a process of injection molding the frame 100 in the first mold, wherein the connection part 30 is also integrally formed with the frame 100 by injection molding in the first mold.

In addition, the plating preventing member forming process (S20) is a process of forming a plating preventing member (not shown) in the non-plating processing unit 20 and the holding portion 32 of the connecting portion 30 of the frame 100.

Accordingly, all parts of the frame 100 except for the wiring pattern part 10 are plated, all parts of the connection part 30 except for the gripping part 32 are plated, and the plating preventing member of the frame 100 is plated. The non-plating treatment unit 20 combined with the plated portion is not plated, and the holding portion 32 is not plated in the connection portion 30.

Accordingly, the + electrode and the-electrode of the wiring pattern part 10 of the frame 100 are separated by the non-plating processing part 20.

When the plating prevention member is described in more detail the process of coupling to the frame 100, the connection portion 30 is formed as follows.

First, a molding groove having a shape corresponding to the plating preventing member is additionally formed in a molding groove having the same shape as the frame 100 in a second mold frame (not shown) in which the plating preventing member is formed.

Accordingly, when the frame 100 is seated in the molding groove of the second mold frame, a space in which the raw material of the plating preventing member is introduced is provided at a portion to which the plating preventing member is additionally formed.

Here, the space (not shown) in which the plating preventing member formed in the second mold is formed is connected to an injection hole (not shown) formed in the second mold, and raw materials of the plating preventing member are injected into the molten state through the injection hole. Injection molding is coupled to the frame 100 at the same time.

Here, a piston (not shown) may be used to inject the plating preventing member into the plating preventing member forming space through the injection hole.

The piston is formed with an inlet through which a raw material of the plating preventing member is introduced in powder form on one side thereof, and a heating chamber for heating the piston by electrothermal high pressure steam or the like is provided at the upper and lower parts thereof.

Accordingly, when the raw material of the plating prevention member in the form of powder is introduced into the piston inlet, the plating prevention member introduced into the piston by the heating chamber is heated to become molten, and the screw inside the piston is rotated to plate the molten plating. The raw material of the prevention member is injected into the inlet of the second mold.

Subsequently, the raw material of the plating preventing member in the molten state injected into the injection hole of the second mold by the piston is injection-molded into the space for forming the plating preventing member of the second mold through the injection tube.

Accordingly, when a predetermined time elapses after the raw material of the plating prevention member flows into the plating prevention member forming space of the second mold frame, the plating prevention member is hardened on the surface of the non-plating treatment part 20 of the frame 100. do.

Subsequently, the upper mold frame and the lower mold frame of the second mold frame are separated, and the plating preventing member is integrally injection molded in the mold to draw out the rigid frame 100.

Wherein the anti-plating member is made of a water-soluble or hydrolyzable polymer material, which will be described in detail in the anti-plating member removal process (S40) to be described later.

The plating step (S30) is a step of plating the injection molded frame 100 in the plating prevention member forming step (S20).

Electroplating or metallizing may be used as the plating method of the present invention. In addition, various known plating methods may be used.

Here, electroplating refers to a method of covering the surface of an object with a thin film of another metal using the principle of electrolysis.

In addition, metalizing is also referred to as metal spraying and refers to a method of plating metal by spraying metal on the surface of an object.

The metal used for the plating may include silver, gold, copper, nickel, and the like, and various metals may be used.

In addition, the plating process (S30) can be performed by dividing a plurality of circuits, it can also be carried out at once.

Meanwhile, the plating preventing member removing process S40 is performed by immersing and dissolving the plated frame 100 and the connecting portion 30 in the removing liquid chemically reacted with the plating preventing member in the plating process S30 to melt the plating preventing member. It is a process of removal.

Here, when the plating prevention member is made of a water-soluble polymer material such as polyvinyl alcohol (PVA), it is preferable to immerse and remove for 2 to 35 hours in hot water of about 25 ~ 95 ℃.

On the other hand, when the plating preventing member is a hydrolyzable polymer, such as polylactic acid resin, it is preferable to immerse and remove for 1 to 120 minutes in an alkali (NaOH, KOH, etc.) aqueous solution of about 25 ~ 70 ℃ temperature.

An embodiment of the plating method of the frame 100 for fixing the backlight 200 of the liquid crystal display device according to the present invention configured as described above will be described with reference to FIG. 5.

First, the integrated frame 100 injection-molded in the first mold is provided, and then the integrated frame 100 is connected to the molding groove of the second mold. Raw material of the molten plating preventing member is injected into the injection hole by using a piston.

Accordingly, the raw material of the plating preventing member is injected into the plating preventing member forming space (not shown) of the second mold frame so that the wiring pattern part 10 and the plating preventing member of the frame 100 are integrally formed by injection molding. Portion except the gripping portion 32 of 30 and the plating preventing member is integrally formed injection.

Subsequently, the integrated frame 100 injection-molded in the second mold frame 100 is drawn out from the second mold frame, and the extracted frame 100 is plated by an electroplating or metallizing method.

In addition, when the plating is completed, the plating prevention member is removed by immersing and melting the plating prevention member of the connection part 30 integrated frame 100 in the removal solution reacting with the plating prevention member.

As a result, after the wiring pattern part 10 is plated on the frame 100, the plating preventing member is decomposed by the removal liquid, so that the unplated non-plating part 20 is exposed to the surface, thereby partially plating.

In addition, the one or more connection parts 30 in the frame 100 are electrically connected to the + power supply terminal 62 and the + power supply terminal 64 by the wiring pattern part 10, respectively.

Similarly, after the connection part 30 is plated, the anti-plating member is decomposed by the removal liquid, whereby the unplated gripping part 32 is exposed to the surface to complete the partial plating.

As described above, when the connection part 30 integrated frame 100 is partially plated, the manufacturing process of the frame is completed.

As mentioned above, although the present invention has been described by way of limited embodiments and drawings, the technical idea of the present invention is not limited thereto, and a person having ordinary skill in the art to which the present invention pertains, Various modifications and variations may be made without departing from the scope of the appended claims.

Since the accompanying drawings are for understanding the technical spirit of the present invention together with the detailed description of the following invention, the present invention should not be construed as limited to the matters shown in the following drawings.

1 is an exploded perspective view showing a state in which a backlight fixing frame of a liquid crystal display according to the present invention is coupled to a liquid crystal display.

2 is a plan view showing a backlight fixing frame of the liquid crystal display according to the present invention.

Figure 3 is a partial plan view showing a state in which the connection portion is coupled to the backlight fixing frame of the liquid crystal display according to the present invention.

Figure 4 is a partial bottom perspective view showing a state in which the backlight is fixed to the gripping portion of the backlight fixing frame of the liquid crystal display according to the present invention.

* Description of the symbols for the main parts of the drawings *

100: frame 102: entrance hole

10: wiring pattern portion 20: non-plating processing portion

30: connection part 32: gripping part

34: connection port 60: power supply terminal

62: + power supply terminal 64:-power supply terminal

200: backlight 202: + electrode

204: electrode 300: liquid crystal display device

Claims (9)

delete delete As a method of manufacturing a frame for fixing a backlight of a liquid crystal display device, A frame forming step of injection molding a frame on which a power terminal portion and at least one connection portion are formed by using a first mold frame; A plating preventing member forming step of injection-forming a plating preventing member in a non-plating treatment portion of the wiring pattern portion which electrically connects at least one connection part and a power terminal part in the frame by using a second mold frame; A plating process in which the plating preventing member plate the injection molded frame; And And a plating preventing member removing step of removing the plating preventing member by immersing the plated frame in a removing solution reacting with the plating preventing member. The method of claim 3, The plating preventing member is made of a water-soluble polymer material, the removal liquid is a manufacturing method of the backlight fixing frame of the liquid crystal display device, characterized in that made of water. The method of claim 4, wherein The water-soluble polymer material is a polyvinyl alcohol (PVA) manufacturing method of the frame for fixing the backlight of the liquid crystal display device. The method of claim 4, wherein The plating preventing member is made of a hydrolyzable polymer material, and the removing solution is made of any one of an alkaline solution or an acid solution. The method of claim 6, The hydrolyzable polymer material is a manufacturing method of the frame for fixing the backlight of the liquid crystal display device, characterized in that made of polylactic acid resin. The method of claim 6, The alkaline solution is a method of manufacturing a frame for fixing a backlight of the liquid crystal display device, characterized in that consisting of at least one of sodium hydroxide solution or potassium hydroxide solution. The method of claim 3, The plating process is a method of manufacturing a frame for fixing a backlight of the liquid crystal display device, characterized in that using any one or more of electroplating or metalizing (Metallizing).

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