KR20080078226A - Liquide crystal display device - Google Patents

Abstract

An LCD(Liquid Crystal Display) is provided to drive EEFLs(External Electrode Fluorescent Lamps) at a low voltage by installing auxiliary voltage supply units in addition to external electrodes which are installed at both ends of each EEFL. An LCD comprises a liquid crystal panel, lamps(102), external electrodes(102a), lamp guides(103), auxiliary voltage supply units, and an inverter(105). The lamps supply light to the liquid crystal panel. Two external electrodes respectively are installed at both ends of each lamp. Each lamp guide has a plurality of lamp holders(103a) to clamp lamps, and supports the lamps. Each auxiliary voltage supply unit, formed at the inner side of each lamp holder, supplies auxiliary voltage to each lamp. The inverter supplies voltage to the external electrodes and the auxiliary voltage supply units.

Description

Liquid crystal display {LIQUIDE CRYSTAL DISPLAY DEVICE}

1 is a cross-sectional view showing a general liquid crystal display device.

FIG. 2 is an enlarged view of a part of the lamp illustrated in FIG. 1, illustrating a perspective view of an external electrode fluorescent lamp and a common electrode connected thereto; FIG.

3 is an exploded perspective view showing a liquid crystal display device according to a first embodiment of the present invention.

4 is an enlarged perspective view of an external electrode fluorescent lamp, a common electrode, an auxiliary voltage supply means, and an inverter shown in FIG. 3;

FIG. 5 is a cross-sectional view illustrating a surface of a portion of the lamp guide illustrated in FIGS. 3 and 4 taken from the top to the bottom thereof.

FIG. 6 is a side view illustrating the external electrode fluorescent lamp, the common electrode and the auxiliary voltage supply unit shown in FIGS. 3 and 4;

7 is a cross-sectional view showing a part of a lamp guide provided in the liquid crystal display according to the second embodiment of the present invention.

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

102: external electrode fluorescent lamp

103: lamp guide 103a, 203a: lamp holder

104: auxiliary voltage supply means 204: magnetic material

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of driving a lamp at a low voltage.

BACKGROUND ART In general, liquid crystal display devices have tended to be gradually widened due to their light weight, thinness, and low power consumption. Accordingly, the liquid crystal display device is widely used as a portable computer such as a notebook PC, office automation equipment, audio / video equipment, and the like.

In general, the liquid crystal display device displays a desired image on a screen by adjusting the amount of light transmitted according to image signals applied to a plurality of control switching elements arranged in a matrix.

The liquid crystal display includes a liquid crystal panel in which a color filter substrate as an upper substrate and a thin film transistor array substrate as a lower substrate are opposed to each other, and a liquid crystal layer is filled therebetween; And a driving unit for supplying scan signals and image information to the liquid crystal panel to operate the liquid crystal panel.

In the liquid crystal panel, a plurality of gate lines and data lines are vertically and horizontally defined to define a plurality of pixels, and each pixel is provided with a switching element to be electrically connected to the gate line and the data line. In addition, the thin film transistor array substrate and the color filter substrate are each provided with a pixel electrode and a common electrode. As the image signal is applied, the liquid crystal is driven by an electric field formed between the pixel electrode and the common electrode to display an image.

Since the liquid crystal display is a non-light emitting device that does not emit light by itself compared to a CRT or an LED, a backlight assembly for supplying light to the liquid crystal panel is required to implement an image.

Light sources for generating light in the backlight assembly include a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL) and a light emitting diode (LED).

Generally, a cold cathode fluorescent lamp is used as a light source of a liquid crystal display device. However, in the case of using a cold cathode fluorescent lamp, an inverter must be connected one to one for each cold cathode fluorescent lamp. In addition, there is a problem that increases, and that the brightness of each lamp is changed according to the output voltage and frequency of the transformer built in the output terminal of each inverter, there is a possibility that the brightness of the displayed screen may be uneven. There is an increasing trend of increasing the number of liquid crystal displays using fluorescent lamps, and research on external electrode fluorescent lamps is also being actively conducted.

This external electrode fluorescent lamp is a structure that discharges the gas inside the lamp by forming an electric field in the glass tube through the external electrodes formed on the outer wall of the both ends of the lamp, it is easier to manufacture than the cold cathode fluorescent lamp and the lamp life is longer Rather, it can be driven by connecting a plurality of external electrode fluorescent lamps in parallel through a single drive has the advantage that a uniform brightness can be obtained.

Hereinafter, the structure of a general liquid crystal display device will be briefly described with reference to FIGS. 1 and 2. 1 and 2 are external electrode fluorescent lamps.

1 is a cross-sectional view showing a general liquid crystal display device.

FIG. 2 is an enlarged view of a part of the lamp illustrated in FIG. 1, and is a perspective view illustrating an external electrode fluorescent lamp and a common electrode connected thereto.

As shown in FIG. 1, a general liquid crystal display device includes a liquid crystal panel 1, a backlight assembly for supplying light to the liquid crystal panel 1, and a lower cover 7 for accommodating the backlight assembly.

The backlight assembly includes a lamp 2 for generating light and an optical sheet 9 positioned above the lamp 2 to increase the efficiency of the light emitted from the lamp 2.

In addition, although not shown in the drawings, a plurality of lamp guides may be provided to support the lamp 2 from below to prevent deformation of the lamp 2.

The lamp 2 shown in FIG. 2 is an external electrode fluorescent lamp 2, which is a glass tube 2b for generating light by applying a phosphor to an inner wall and an amount of the glass tube 2b. It is configured to include an external electrode (2a) provided at the end.

The liquid crystal display device having the external electrode fluorescent lamp 2 includes a common electrode 10 for supplying a voltage to the external electrode 2a and is formed at both ends of each external electrode fluorescent lamp 2. The voltage is supplied to the external electrode 2a.

The voltage supplied to the common electrode 10 forms an electric field in the external electrode fluorescent lamp 2 through the external electrode 2a, thereby causing the external electrode fluorescent lamp 2 to emit light.

In recent years, as the size of liquid crystal displays increases, the length of the external electrode fluorescent lamps employed in the liquid crystal display device is increasing. Accordingly, a higher voltage is required to drive the external electrode fluorescent lamps. However, when a high voltage is applied to an external electrode provided in the external electrode fluorescent lamp, ozone is generated to not only cause environmental pollution, but also to generate pin-holes, resulting in lamp failure.

Therefore, in order to solve such a problem, a method of applying a minimum voltage to the external electrode capable of stably driving the external electrode fluorescent lamp has been devised. However, when the lamp is driven at a low temperature, a lamp that does not turn on among a plurality of lamps is generated, resulting in a screen defect of the liquid crystal display device.

Accordingly, an object of the present invention for solving the above problems is, by providing an auxiliary voltage supply means in addition to the external electrodes provided at both ends of the external electrode fluorescent lamp, the liquid crystal display device capable of driving the external electrode fluorescent lamp at a low voltage In providing.

The present invention for achieving the above object is a liquid crystal panel; One or more lamps supplying light to the liquid crystal panel; External electrodes provided at both ends of the lamp; At least one lamp guide having a lamp holder for fastening the lamp and supporting the lamp; Auxiliary voltage supply means formed on an inner surface of a lamp holder to which the lamp is fastened to supply an auxiliary voltage to the lamp; It characterized in that it comprises an inverter for supplying a voltage to the external electrode and the auxiliary voltage supply means.

Hereinafter, a liquid crystal display according to the present invention will be described in detail with reference to the accompanying drawings.

First, a liquid crystal display according to a first exemplary embodiment of the present invention will be described with reference to FIGS. 3 to 6.

3 is an exploded perspective view illustrating a liquid crystal display according to a first embodiment of the present invention.

4 is an enlarged perspective view illustrating the external electrode fluorescent lamp, the common electrode, the auxiliary voltage supplying means, and the inverter shown in FIG. 3.

FIG. 5 is a cross-sectional view illustrating a surface of a portion of the lamp guide illustrated in FIGS. 3 and 4 cut from the top to the bottom.

6 is a side view illustrating the external electrode fluorescent lamp, the common electrode, and the auxiliary voltage supply unit shown in FIGS. 3 and 4.

3 and 4, the liquid crystal display device according to the present invention includes a liquid crystal panel 101; One or more lamps 102 supplying light to the liquid crystal panel 101; External electrodes 102a provided at both ends of the lamp 102; At least one lamp guide (103) having a lamp holder (103) for fastening the lamp (102) and supporting the lamp (102); Auxiliary voltage supply means 104 formed on an inner surface of a lamp holder 103a to which the lamp 102 is fastened to supply an auxiliary voltage to the lamp 102; It includes a inverter 105 for supplying a voltage to the external electrode (102a) and the auxiliary voltage supply means 104. In addition, the main support 106 for receiving the liquid crystal panel 101; A lower cover 107 for accommodating the lamp 102 therein; The upper cover 108 is further provided to wrap the edge of the upper surface of the liquid crystal panel 101 and surround the sides of the main support 106 and the lower cover 107. An optical sheet 109 may be provided to increase the efficiency of the light emitted from the 102.

The liquid crystal display according to the first embodiment of the present invention having the above configuration will be described in detail as follows.

The liquid crystal panel 101 includes a color filter substrate as an upper substrate and a thin film transistor array substrate as a lower substrate, and a liquid crystal layer (not shown) is formed between the two substrates.

In describing the first preferred embodiment of the present invention, it is assumed that the lamp 102 is an external electrode fluorescent lamp. However, the lamp 102 provided in the liquid crystal display device according to the first embodiment of the present invention is not limited to the external electrode fluorescent lamp and other types of cold cathode fluorescent lamps, such as cold cathode fluorescent lamps, are not limited within the scope of the present invention. It is sufficiently possible to employ a lamp.

Hereinafter, in describing the first embodiment of the present invention, the lamp 102 will be called an external electrode fluorescent lamp.

As shown in FIG. 3 or 4, the external electrode fluorescent lamp 102 includes a glass tube 102b and external electrodes 102a provided at both ends of the glass tube 102b.

The glass tube 102b, which is a component of the external electrode fluorescent lamp 102, has a tube shape in which both ends are sealed, and discharge gas such as neon (Ne), argon (Ar), and mercury (Hg) inside. Is injected, and a phosphor is applied to the inner wall.

As shown in FIG. 3 or 4, the external electrodes 102a formed at both ends of the glass tube 102b are preferably made of a conductive material, and have a shape surrounding both ends of the glass tube 102b.

The external electrode 102a receives an electric voltage supplied from the common electrode 110 to form an electric field in the glass tube 102b. As a result, neon (Ne) and argon (Ar) inside the glass tube 102b are excited to form an electric field. Occurs. When these electrons collide with mercury (Hg) inside the glass tube, the mercury (Hg) is excited and briefly comes down to a stable state, and ultraviolet rays are generated, and the ultraviolet rays react with the phosphor applied inside the glass tube 102b. Thus, visible light is generated. As a result, the glass tube 102b, that is, the external electrode fluorescent lamp 102 emits light.

The external electrodes 102a at both ends of the glass tube 102b are supplied with voltages having the same size but opposite polarity, or a high voltage at one of the external electrodes 102a at both ends of the glass tube 102b. Is applied and the ground voltage GND is applied to the other external electrode 102a.

As shown in FIG. 3 or FIG. 4, the common electrode 110 has a rod shape, and a portion of the common electrode 110 surrounds the external electrode 102a of the external electrode fluorescent lamp 102. 110 receives a voltage from the inverter 105 and applies the voltage to the external electrode 102a so that the external electrode fluorescent lamp 102 emits light.

As shown in Figure 3 or 4, the lamp guide 103, the rod-shaped support portion 103b coupled to the lower cover 107; At least one lamp holder 103a formed on an upper surface of the support part 103b to fix and support the external electrode fluorescent lamp 102; It comprises a sheet support portion 103c protruding in a conical shape from the upper surface of the support portion 103b to support the optical sheet 109 provided on the external electrode fluorescent lamp 102. Here, the auxiliary voltage supply means 103a which is formed on the inner surface of the lamp holder 103 to which the external electrode fluorescent lamp 102 is fastened to supply the auxiliary voltage to the external electrode fluorescent lamp 102 is also provided. The following will be described below.

In describing the first embodiment of the present invention, the number of lamp guides 103 formed inside the lower cover 107 is six, but the lamp guide 103 is provided within the scope not departing from the gist of the present invention. It is sufficiently possible to change the number.

The support part 103b has a rod shape, and a lamp holder 103a and a sheet support part 103c are formed on an upper surface thereof.

The lamp holder 103a is formed of a pair of protrusions facing each other by protruding to an upper portion of the base 103b, and the surfaces of the lamp holders 103 cover the outer surface of the external electrode fluorescent lamp 102. It has the shape of a curved surface curvature.

In the description of the first embodiment of the present invention, the number of lamp holders 103a formed on the upper surface of each support portion 103b has been exemplified as four, but the range of the lamp holders 103a without departing from the gist of the present invention. It is sufficiently possible to change the number.

The sheet support part 103c has a conical shape and protrudes upward from the support part 103b, and the sheet support part 103c has an upper end supported by touching the surface of the optical sheet 109. Preventing 109 from sagging in the direction of the external electrode fluorescent lamp 102.

As shown in FIG. 4, the auxiliary voltage supply means 104 is formed on the inner surface of the lamp holder 103a to which the external electrode fluorescent lamp 102 is fastened, and directly contacts the outer surface of the external electrode fluorescent lamp 102. An auxiliary voltage is supplied to the external electrode fluorescent lamp 102.

The auxiliary voltage supply means 104 is preferably formed of a material of a conductor.

Referring to FIG. 5, the auxiliary voltage supply means 104 is connected to the inverter 105 through a wiring 103d formed inside or outside the lamp guide 103, and thus, the inverter 105 through the wiring 103d. It is characterized in that the voltage is supplied from).

Two auxiliary voltage supply means 104 connected to each of the external electrode fluorescent lamps 102 are supplied with voltages having the same size but opposite polarity, or one of the two auxiliary voltage supply means 104. The high voltage is applied to the 104 and the ground voltage GND is applied to the remaining auxiliary voltage supply means 104. Here, in the former case, a voltage having a polarity opposite to that supplied to the adjacent external electrode 102a is applied to the auxiliary voltage supply means 104, and in the latter case, the auxiliary voltage supply means 104 is applied to the auxiliary voltage supply means 104. When a high voltage is applied to the nearest external electrode 102a, a base voltage GND is applied, and when a base voltage GND is applied to the nearest external electrode 102a, a high voltage is applied.

Therefore, as shown in FIG. 6, when the entire section of the external electrode fluorescent lamp 102 is defined as L, and between each external electrode 102a and the auxiliary voltage supply means 104 is defined as L1, L2, L3, When voltage is supplied from the external electrode 102a and the auxiliary voltage supply means 104, discharge occurs in three sections L1, L2, and L3, respectively. That is, by providing the auxiliary voltage supply means 104 in the external electrode fluorescent lamp 102, an effect similar to driving three sections L1, L2, and L3 separately can be obtained.

Accordingly, when the external electrode fluorescent lamp 102 is turned on under low external temperature, all of the plurality of external electrode fluorescent lamps 102 provided in the liquid crystal display are stably and simultaneously turned on.

In addition, as described above, the external electrode fluorescent lamp 102 includes an external electrode 102a and an auxiliary voltage supply means 104, thereby driving the external electrode fluorescent lamp 102 to drive the external electrode 102a. Through this there is an effect that can minimize the voltage applied to the external electrode fluorescent lamp 102.

Accordingly, the pin-hole mainly generated in the external electrode fluorescent lamp 102 is not generated due to a high voltage, thereby increasing the reliability of the external electrode fluorescent lamp 102. In addition, since a high amount of ozone, which is particularly generated when a high voltage is applied to the external electrode 102a, is minimized, the problem of polluting the environment is reduced.

In the description of the first embodiment according to the present invention, the auxiliary voltage supply means 104 is provided with two for each external electrode fluorescent lamp 102 as an example, but the present invention is not limited thereto, and It is possible to be provided with two or more within the scope without departing from the gist.

Here, among the plurality of auxiliary voltage supply means 104 for supplying the auxiliary voltage to the same external electrode fluorescent lamp 102, voltages having opposite polarities are applied to the auxiliary voltage supply means 104 adjacent to each other. A voltage having a polarity opposite to that of the adjacent external electrode 102a is applied to the auxiliary voltage supply means 104 closest to the electrode 102a. Alternatively, a high voltage is applied to some of the auxiliary voltage supplying means 104 among the plurality of auxiliary voltage supplying means 104 supplying the auxiliary voltage to the same external electrode fluorescent lamp 102 and the electromotive force is applied to the remaining auxiliary voltage supplying means 104. A voltage GND is applied to the auxiliary voltage supply means 104 adjacent to each other, and a different voltage is applied among the high voltage and the base voltage GND. In this case, the auxiliary voltage supply means closest to the external electrode 102a to which the high voltage is applied is applied. The base voltage GND is applied to the 104, and a high voltage is applied to the auxiliary voltage supply means 104 that is closest to the external electrode 102a to which the base voltage GND is applied.

3 and 4, the inverter 105 converts the power supplied from the outside to supply to the external electrode fluorescent lamp 102. That is, the inverter 105 converts the power supplied from the outside and supplies a voltage to the external electrode 102a formed on the external electrode fluorescent lamp 102 and the auxiliary voltage supply means 104 formed on the lamp guide 103. The external electrode fluorescent lamp 102 is driven accordingly.

Hereinafter, a second preferred embodiment of the present invention will be described with reference to FIG.

7 is a cross-sectional view illustrating a part of a lamp guide provided in the liquid crystal display according to the second embodiment of the present invention.

In the description of the second embodiment of the present invention, components not shown in FIG. 7 will be referred to FIGS. 3 to 6 which are views showing the first embodiment of the present invention.

As shown in FIG. 7, the liquid crystal display according to the second embodiment of the present invention includes a liquid crystal panel (see 101 in FIG. 3); One or more lamps supplying light to the liquid crystal panel (see 102 of FIG. 3 or 4); At least one lamp guide (203) having a lamp holder (203a) for fastening the lamp and supporting the lamp; It is configured to include, the inner surface of the lamp holder is fastened to the lamp is characterized in that made of a magnetic material (204).

In the description of the liquid crystal display according to the second embodiment of the present invention, the same parts as those of the first embodiment of the present invention will be omitted.

In the description of the second preferred embodiment of the present invention, the lamp is an external electrode fluorescent lamp. However, the lamp provided in the liquid crystal display according to the second embodiment of the present invention is not limited to the external electrode fluorescent lamp, and it is possible to employ other kinds of lamps such as cold cathode fluorescent lamps.

Hereinafter, in describing the second embodiment of the present invention, the lamp is called an external electrode fluorescent lamp.

FIG. 7, which is a view for explaining a second embodiment of the present invention, shows only one lamp holder 203a among the plurality of lamp holders 203a formed in the lamp guide 203 for convenience of description.

Here, the inner surface of the lamp holder 203a to which the external electrode fluorescent lamp is fastened is made of a magnetic material 204.

As such, when the inner surface of the lamp holder 203a to which the external electrode fluorescent lamp directly touches is formed of the magnetic material 204, the magnetic material forms a magnetic field inside the external electrode fluorescent lamp, and the external electrode fluorescence together with the external electrode. The lamp is emitted.

That is, the magnetic material 204 inside the lamp holder 203a serves to further activate the electrons generated by the voltage supplied from the external electrode, thereby helping to turn on the external electrode fluorescent lamp.

Therefore, when the external electrode fluorescent lamp is turned on under low external temperature, all of the plurality of external electrode fluorescent lamps are stably lit at the same time.

In addition, since the magnetic material 204 inside the lamp holder 203a serves to help the external electrode fluorescent lamp to be turned on, the voltage applied to the external electrode of the external electrode fluorescent lamp can be minimized.

Therefore, the pin-hole which is mainly generated in the lamp is not generated due to the high voltage, thereby increasing the reliability of the external electrode fluorescent lamp. In addition, since the amount of ozone that is generated especially when a high voltage is applied to the external electrode is minimized, the problem of polluting the environment is reduced.

As described above in detail, the present invention has the effect that the gas discharge inside the external electrode fluorescent lamp is sufficiently performed in the entire region of the external electrode fluorescent lamp by forming the auxiliary voltage supply means.

Accordingly, when the external electrode fluorescent lamp is turned on under a low external temperature, all of the plurality of external electrode fluorescent lamps provided in the liquid crystal display are stably lit at the same time.

In addition, the external electrode fluorescent lamp includes an external electrode and an auxiliary voltage supply means to minimize the voltage applied to the external electrode to drive the external electrode fluorescent lamp. Accordingly, pin-holes, which are mainly generated in the external electrode fluorescent lamp due to the high voltage, do not occur, thereby increasing the reliability of the external electrode fluorescent lamp. In addition, since the amount of ozone that is generated especially when a high voltage is applied to the external electrode is minimized, there is an advantage that the problem of polluting the environment is reduced.

As described above, in another embodiment of the present invention, the inner surface of the lamp holder, which is a component of the lamp guide, is formed of a magnetic material, so that the gas discharge inside the external electrode fluorescent lamp is sufficiently performed in the entire region of the external electrode fluorescent lamp. There is.

Therefore, when the external electrode fluorescent lamp is turned on under low external temperature, all of the plurality of external electrode fluorescent lamps are stably lit at the same time.

In addition, since the magnetic material inside the lamp holder serves to help the external electrode fluorescent lamp to be turned on, the voltage applied to the external electrode of the external electrode fluorescent lamp can be minimized. Accordingly, pin-holes, which are mainly generated in the lamp due to the high voltage, do not occur, thereby increasing the reliability of the external electrode fluorescent lamp. In addition, since the amount of ozone that is generated especially when a high voltage is applied to the external electrode is minimized, the problem of polluting the environment is reduced.

Claims (26)

A liquid crystal panel; One or more lamps supplying light to the liquid crystal panel; External electrodes provided at both ends of the lamp; At least one lamp guide having a lamp holder for fastening the lamp and supporting the lamp; Auxiliary voltage supply means formed on an inner surface of a lamp holder to which the lamp is fastened to supply an auxiliary voltage to the lamp; An inverter for supplying a voltage to the external electrode and the auxiliary voltage supply means; Liquid crystal display device comprising a. The liquid crystal display of claim 1, wherein voltages having opposite polarities are applied to external electrodes provided at both ends of the lamp. According to claim 1, Among the external electrodes provided on both ends of the lamp, A high voltage is applied to one external electrode and a ground voltage (GND) is applied to the other external electrode. The method of claim 2, wherein a plurality of auxiliary voltage supply stages for supplying an auxiliary voltage to the same lamp, Liquid crystal display device characterized in that the voltage of opposite polarity is applied to the auxiliary voltage supply means adjacent to each other. The method of claim 3, wherein among the plurality of auxiliary voltage supply means for supplying an auxiliary voltage to the same lamp, And a different voltage is applied to the auxiliary voltage supply means adjacent to each other. The method of claim 4, wherein the auxiliary voltage supply means closest to the external electrode, And a voltage having a polarity opposite to that of an adjacent external electrode. The method of claim 5, wherein a ground voltage GND is applied to the auxiliary voltage supply means closest to the external electrode to which a high voltage is applied. And a high voltage is applied to the auxiliary voltage supply means closest to the external electrode to which the ground voltage (GND) is applied. The liquid crystal display device according to claim 1, further comprising a lower cover for accommodating the lamp therein. The liquid crystal display of claim 1, wherein the lamp holder has a shape surrounding a part of the lamp. The liquid crystal display device according to claim 1, wherein the auxiliary voltage supply means is made of a conductor. A liquid crystal panel; One or more lamps supplying light to the liquid crystal panel; Electrodes formed at both ends of the lamp; At least one lamp guide having a lamp holder for fastening the lamp and supporting the lamp; Auxiliary voltage supply means formed on an inner surface of a lamp holder to which the lamp is fastened to supply an auxiliary voltage to the lamp; An inverter for supplying a voltage to the internal electrode and the auxiliary voltage supply means; Liquid crystal display device comprising a. 12. The liquid crystal display device according to claim 11, wherein voltages having opposite polarities are applied to electrodes provided at both ends of the lamp. The liquid crystal display of claim 11, wherein a high voltage is applied to one of the electrodes provided at both ends of the lamp, and a ground voltage (GND) is applied to the other electrode. The method of claim 12, wherein a plurality of auxiliary voltage supply means for supplying an auxiliary voltage to the same lamp, Liquid crystal display device characterized in that the voltage of opposite polarity is applied to the auxiliary voltage supply means adjacent to each other. The method of claim 13, wherein a plurality of auxiliary voltage supply means for supplying an auxiliary voltage to the same lamp, And a different voltage is applied to the auxiliary voltage supply means adjacent to each other. The method of claim 14, wherein the auxiliary voltage supply means closest to the electrode, And a voltage having a polarity opposite to that of the adjacent electrode. The method of claim 15, wherein the ground voltage (GND) is applied to the auxiliary voltage supply means closest to the electrode to which a high voltage is applied, And a high voltage is applied to the auxiliary voltage supply means closest to the electrode to which the ground voltage (GND) is applied. 12. The liquid crystal display device according to claim 11, wherein the electrodes are formed at both ends of the lamp. 12. The liquid crystal display device according to claim 11, wherein the electrodes are formed at both ends of the outside of the lamp. 12. The liquid crystal display device according to claim 11, further comprising a lower cover for accommodating the lamp. 12. The liquid crystal display device according to claim 11, wherein the lamp holder surrounds a part of the lamp. 12. The liquid crystal display device according to claim 11, wherein the auxiliary voltage supply means is made of a conductor. A liquid crystal panel; One or more lamps supplying light to the liquid crystal panel; At least one lamp guide having a lamp holder for fastening the lamp and supporting the lamp; It is configured to include, The inner surface of the lamp holder to which the lamp is fastened, characterized in that made of a magnetic material. 24. The liquid crystal display device according to claim 23, wherein electrodes are formed at both ends of the lamp. The liquid crystal display device according to claim 23, further comprising a lower cover for accommodating the lamp. 24. The liquid crystal display device according to claim 23, wherein the lamp holder has a shape surrounding a part of the lamp.

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