KR20070077674A - Backligth assembly and liquid crystal display having the same - Google Patents

Abstract

A back light assembly and an LCD(Liquid Crystal Display) including the same are provided to reduce the lighting time of a lamp by means of the leakage capacitance of the lamp and to also reduce the lighting time deviation between plural lamps. Plural lamps are driven in parallel. A conductive member(500) is arranged at a peripheral area of an edge of plural lamps. A receiving member receives the plural lamps and the conductive member. The conductive member is arranged at the peripheral area of an edge adjacent to a power input terminal of the lamp. The conductive member also includes a metal thin layer or a metal plate partially overlapped with the edge of each lamp. The metal plate includes an adjacent portion or a concave adjacent portion with a ring shape overlapped with the edge of the lamp. Lamp holders are arranged at both ends of the lamp and lamp fixing members are arranged at both edges of the lamp.

Description

BACKLIGTH ASSEMBLY AND LIQUID CRYSTAL DISPLAY HAVING THE SAME}

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

Fig. 2 is a cross sectional view after the liquid crystal display of the first embodiment is coupled;

3 is a conceptual diagram for explaining driving of a lamp.

4 is a conceptual view illustrating the operation of the backlight assembly according to the first embodiment;

5 to 7 are perspective views of the conductive member according to the first embodiment.

8 and 9 are graphs of the test results of the lighting time of the lamp unit of the backlight assembly.

10 is an exploded perspective view of a liquid crystal display according to a second exemplary embodiment of the present invention.

Fig. 11 is a sectional view after the liquid crystal display of the second embodiment is combined.

12 is a perspective view showing a part of the lamp fixing means according to the present embodiment;

13 is an exploded perspective view of a liquid crystal display according to a third exemplary embodiment of the present invention.

Fig. 14 is a sectional view after the liquid crystal display of the third embodiment is combined.

<Explanation of symbols for the main parts of the drawings>

100: liquid crystal display panel 400: lamp unit

500: conductive member 600: lamp fixing means

The present invention relates to a backlight assembly and a liquid crystal display including the same, and a backlight assembly capable of improving a lighting time of a lamp in the backlight assembly and a liquid crystal display having the same.

Liquid crystal displays (LCDs) are light-receiving elements that do not emit light by themselves, and thus have a backlight for providing light to the liquid crystal display panel under the liquid crystal display panel. Typical requirements for backlights include high brightness, high efficiency, uniformity of brightness, long life, thinness, low weight and low cost. For example, a backlight and a high-efficiency lamp are required for a backlight used in a notebook computer or a small electronic device, and a lamp having high uniformity of high brightness and brightness is required for a monitor or a TV LCD.

Such a backlight is classified into an edge type and a direct type according to the position of the light source. The dual direct backlight has been developed as the size of the liquid crystal display becomes larger, and a plurality of lamps are arranged in a row at the lower portion of the liquid crystal display panel to irradiate light onto the entire liquid crystal display panel. In the case of such a direct type backlight, high luminance can be obtained by using a plurality of lamps.

Lamps used for direct backlights have near-infinite impedances before they are lit, but once they are driven, they are smaller than 500 kW.

Since the characteristics of each lamp are not all uniform, some lamps have a good lighting characteristic and are turned on first, and some lamps turn on later. In this case, the impedance difference between the lamp that is lit and the lamp that is not lit is large. Due to this impedance difference, the output current of the transformer is all directed to the lit lamp, which causes partial lighting, and in the worst case, the lamp is turned off by the protection circuit.

Accordingly, an object of the present invention is to solve the above problems, and to provide a backlight assembly capable of uniformly lighting a plurality of lamps by improving lighting efficiency of a lamp and a liquid crystal display device including the same. It is done.

In order to achieve the above object, the present invention provides a backlight assembly including a plurality of lamps driven in parallel, a conductive member provided around an edge region of the plurality of lamps, and a housing member accommodating the plurality of lamps and the conductive member. to provide.

Here, the conductive member is preferably provided around the edge region adjacent to the power input terminal of the lamp.

In this case, it is preferable that the conductive member includes a metallic thin film or metallic plate in which an edge region of each of the plurality of lamps and a portion thereof overlap. Of course, the metallic thin film or the metallic plate is effective to include a ring-shaped adjoining portion or a concave-shaped adjoining portion overlapping the edge region of the lamp.

Preferably, the lamp holder further includes lamp holders provided at both ends of the plurality of lamps described above, and lamp fixing means provided at both edges of the lamp to fix the lamp holder. And it is effective that the conductive member is provided between the lamp holder and the lamp fixing means. Of course, it is effective that the conductive member is provided in the lamp fixing means overlapping the plurality of lamps.

Further comprising a diffusion plate provided on the plurality of lamps described above, it is preferable that the conductive member is provided on at least one edge of the diffusion plate.

In addition, a backlight assembly including a plurality of lamps for generating light through parallel driving according to the present invention, a conductive member provided around an edge region of the plurality of lamps, and a housing member accommodating the plurality of lamps and the conductive members. And a liquid crystal display panel displaying an image using light supplied from the backlight assembly.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you.

1 is an exploded perspective view of a liquid crystal display according to a first exemplary embodiment of the present invention. 2 is a cross-sectional view after the liquid crystal display of the first embodiment is coupled.

3 is a conceptual diagram illustrating the driving of a lamp, and FIG. 4 is a conceptual diagram illustrating the operation of the backlight assembly according to the first embodiment. 5 to 7 are perspective views of the conductive member according to the first embodiment.

1 and 2, the liquid crystal display according to the present exemplary embodiment includes a display assembly 1000 disposed above and a backlight assembly 2000 disposed below.

The display assembly 1000 includes a liquid crystal display panel 100 and driving circuits 200 (200a and 200b).

The liquid crystal display panel 100 includes a common electrode substrate 110 and a thin firm transistor (TFT) substrate 130. The common electrode substrate 110 has R, G, and B color filters, which are color pixels in which a predetermined color is expressed as light passes, and have an indium tin oxide (ITO) or an indium zinc oxide (ITO) on the front surface thereof. A common electrode made of a transparent conductor such as indium zinc oxide (IZO) is coated.

The TFT substrate 130 is a transparent glass substrate on which a matrix TFT and a pixel electrode are formed. The data line is connected to the source terminal of the TFTs, and the gate line is connected to the gate terminal. In addition, a pixel electrode made of a transparent electrode made of a transparent conductive material is formed in the drain terminal. When an electrical signal is input to the data line and the gate line, each TFT is turned on or turned off to apply an electrical signal necessary for pixel formation of the drain terminal. When the TFT is turned on by applying power to the gate terminal and the source terminal of the TFT substrate 130, an electric field is formed between the pixel electrode and the common electrode of the common electrode substrate 110, thereby forming a common electric field with the TFT substrate 130. The arrangement of the liquid crystals injected between the electrode substrates 110 is changed, and the light transmittance is changed according to the changed arrangement to obtain a desired image.

The driving circuit unit 200 connected to the liquid crystal display panel 100 includes a data side printed circuit board 210a for mounting a control IC and applying a predetermined data signal to a data line of the TFT substrate 130. And a gate side printed circuit board 210b for mounting a control IC and applying a predetermined gate signal to a gate line of the TFT substrate 130, and an exposed ground pattern, the TFT substrate 130 and the data side printed circuit board. A data side flexible printed circuit board 230a for connecting between 210a and a gate side flexible printed circuit board for connecting between the TFT substrate 130 and the gate side printed circuit board 210b with an exposed ground pattern. 230b.

When the gate control IC is provided on the thin film transistor 130, the gate side printed circuit board 210b and the gate side flexible circuit board 230b may be omitted.

An upper accommodating member 300 may be provided at an upper side of the display assembly 1000, and a liquid crystal panel supporting means 350 may be provided at a lower side thereof.

Here, the upper accommodating member 300 may be at a right angle to protect the liquid crystal display panel 100 or the backlight assembly 2000 that are easily broken by an impact applied from the outside while preventing the components of the display assembly 1000 from being separated. It is manufactured in the form of a square frame having a curved flat portion and a side wall portion. The liquid crystal panel support means 350 is provided between the backlight assembly 2000 and the upper accommodating member 300 to prevent the display assembly 1000 from being separated. Here, the upper housing member 300 and the liquid crystal panel support means 350 are preferably manufactured by using plastic having excellent strength, light weight, and low deformation.

Next, the backlight assembly 2000 includes a lamp unit 400 for generating light, a conductive member 500 provided at at least one end of the lamp unit 400, and a lamp unit 400 provided with the conductive member 500. The lamp fixing means 600 for fixing the lamp, the diffusion plate 700 and the optical plate 800 disposed on the lamp fixing means 600, the lamp unit 400, the conductive member 500, and the lamp fixing. A lower accommodating member 900 for accommodating the means 600, the diffusion plate 700, and the optical plate 800, and a power supply provided under the lower accommodating member 900 to apply power to the lamp unit 400. The applicator 910 is included.

The lamp unit 400 includes a plurality of lamps 410 and a lamp holder 420 surrounding electrode portions at both ends of the lamp 410.

The plurality of lamps 410 generates light by a driving voltage applied from the outside. Lamp 410 mainly uses a cold cathode fluorescent lamp, each of the lamps 410 is composed of a glass tube, inert gas contained in the glass tube, and the negative electrode and the positive electrode is provided at both ends of the glass tube. At this time, the phosphor is coated on the inner wall of the glass tube. The plurality of lamps 410 are preferably arranged at equal intervals for luminance uniformity. The lamp holder 420 may be provided at both ends of the lamp 410 to be fixed to the lamp fixing means 600 to fix the lamp 410, and to prevent the lamp 410 from being damaged from an external shock.

The conductive member 500 of the present embodiment is provided on the outside of the glass tube adjacent to the power input terminal of the plurality of lamps 410, and manufactured using a conductive material. The conductive member 500 may form a leakage capacitor with the lamp 410 to improve lighting efficiency of the lamp 410, thereby solving a partial lighting problem of the plurality of lamps 410. Detailed description thereof will be described later.

The lamp fixing means 600 is manufactured in a frame shape provided at both edges of the lamp, and a fixing part 650 for supporting and fixing the lamp holder 420 of the lamp unit 400 is provided therein.

The diffusion plate 700 directs the light incident from the plurality of lamps 410 toward the front of the liquid crystal display panel 100 and diffuses the light to have a uniform distribution in a wide range to irradiate the liquid crystal display panel 100. Let's do it. As the diffusion plate 700, it is preferable to use a film made of a transparent resin coated with a predetermined light diffusion member on both surfaces.

The optical plate 800 may include a polarizer and a brightness enhancement plate. The polarizer serves to change the light incident at an oblique angle among the light incident thereto to be emitted vertically. This is because the light efficiency increases when the light incident on the liquid crystal display panel 100 is perpendicular to the liquid crystal display panel 100. Therefore, at least one polarizer may be disposed under the liquid crystal display panel 100. The brightness enhancing plate transmits light parallel to its transmission axis and reflects light perpendicular to the transmission axis. It is preferable that the transmission axis of such a brightness improving plate has the same direction as the polarization axis of the polarizing plate in order to increase the transmission efficiency.

The lower accommodating member 900 is formed in a box shape of a rectangular parallelepiped with an upper surface open to form an accommodating space having a predetermined depth therein. The lower accommodating member 900 includes a bottom surface and sidewalls extending vertically from each edge from the bottom surface. A reflecting plate (not shown) may be provided on the bottom surface of the lower accommodating member 900.

In the present exemplary embodiment, the conductive member 500 may be formed to surround the edges of the plurality of lamps 410. The conductive member 500 may increase the leakage capacitor around the lamp to improve the lighting capability of the lamp 410. .

As shown in FIG. 3A, the lamp 410 starts to emit light when electrons generated at an input terminal to which power is applied reach the ground terminal. However, as shown in FIG. 3B, when the leakage capacitors C1 and C2 are provided around the lamp 410, some of the electrons generated at the power input terminal are discharged to the leakage capacitors C1 and C2 to emit light. The lighting efficiency of the lamp 410 can be improved. That is, as shown in (b) of FIG. 3, the first leakage capacitor C1 is provided in an area adjacent to the lamp power input terminal and the second leakage capacitor C2 is provided in the center of the lamp 410. same. Some of the electrons generated at the lamp power input terminal are discharged to the adjacent first leakage capacitor C1 to light the input terminal and the first leakage capacitor C1 region. Thereafter, the electrons continue to travel inside the lamp 410 to discharge to the second leakage capacitor C2, thereby lighting an area between the first leakage capacitor C1 and the second leakage capacitor C2, and again the electron The interior of the lamp 410 reaches the ground terminal of the lamp 410 to light the region between the second leakage capacitor C2 and the ground terminal. As the lamp 410 is divided into three regions and sequentially turned on, the lamp 410 is turned on faster, and lighting uniformity between the plurality of lamps 410 having different internal characteristics can be maintained.

In more detail, the lighting time of the lamp 410 is greatly increased by the power applied to the lamp 410 and the brightness around the lamp 410, that is, the amount of photons (light) inside the lamp 410. Is changed. Here, photons inside the lamp 410 serve to promote lighting of the lamp 410. That is, even when the same power source is applied, when there is no photon amount inside the lamp 410, a difference in lighting time of several tens or more occurs.

Accordingly, the backlight assembly 2000 according to the present exemplary embodiment may provide a conductive member 500 that may increase leakage capacitors in an area adjacent to the power input terminals of each of the plurality of lamps 410, and may be applied to the input terminal while the lamp power is applied. Light emission between the leakage capacitor regions may be increased first to increase the photon weight inside the lamp 410, thereby reducing the lighting time of the lamp 410. Since a part of the lamp 410 emits light, impedance of each of the plurality of lamps 410 may be reduced. It can be lowered to achieve uniform lighting.

At this time, the conductive member 500 may be in contact with the lamp, it may be spaced apart a predetermined interval. However, since the capacitance value of the leakage capacitor may be increased when contacted, in this embodiment, it is preferable that the conductive member 500 be disposed at a predetermined distance from the lamp.

Here, the plurality of lamps 410 of the backlight assembly 2000 of the present exemplary embodiment are driven in parallel, and the brightness of the lamps 410 is increased by equalizing the amount of current applied to each lamp 410 using the balance transformer. You can keep it constant.

As shown in FIG. 4, the first and second main transformer parts T1 and T2 connected to the inverter unit 920, respectively, and the first and second windings connected to the secondary winding of the first main transformer part T1. Third lamps 410a and 410c, second and fourth lamps 410b and 410d connected to secondary windings of the second main transformer part T2, and the first and second lamps 410a and 410b. A first balance transformer section BT1 having primary windings connected to each other, and a second balance transformer section BT2 having primary windings connected to each of the third and fourth lamps 410c and 410d, The secondary winding of the first balance transformer BT1 is connected to the secondary winding of the second balance transformer BT2.

In this case, the power transformed through the first and second main transformers T1 and T2 is applied to the first to fourth lamps 410a, 410b, 410c, and 410d, respectively, and the first to fourth lamps ( The edge region of the lamps 410a, 410b, 410c, and 410d is first emitted by the conductive member 500 provided in an area adjacent to the power input terminal of the 410a, 410b, 410c, and 410d to form a leakage capacitor. All of the lamps 410a, 410b, 410c, and 410d emit light uniformly in a short time. Then, the first and second lamps 410a, 410b, 410c, and 410d are connected to the first to fourth lamps 410a, 410b, 410c, and 410d through the first and second balance transformers BT1 and BT2 connected to the other ends. The brightness of the lamps 410a, 410b, 410c, and 410d may be constant by uniformly adjusting the current.

As described above, the conductive member 500 capable of shortening the lighting time of the lamp 410 by increasing the leakage capacitor on one side of the lamp 410 and improving the lighting uniformity among the plurality of lamps 410 is electrically conductive. It is preferable to produce using this excellent metallic material.

Examples of the metallic materials include Ag, Cu, In, Mg, Zn, Sb, Sn, Li, Be, B, Al, Ca, Sr, Ba, W, Au, Pd, Pt, Rh, Ru, Ir, and their Preference is given to using at least one conductive material of the alloy. Of course, the present embodiment is not limited to the conductive material, any material having excellent electrical conductivity may be used.

The conductive material may be manufactured and used in the form of a thin metallic thin film, or may be processed and used in the form of a metal plate. That is, as shown in FIG. 5, the conductive member 500 includes a body 510 having a thin metal thin film shape, and a plurality of lamp adjacent parts surrounding a portion of an edge portion of the lamp 410 on a portion of the body 510. 520. At this time, although not shown, the body 510 may be separated into two upper and lower portions, and the two may be combined to form the conductive member 500. As such, since the thin film is used as the conductive member 500 to cover a portion of the edge of the lamp 410, the lighting efficiency may be improved without increasing the weight of the backlight assembly. In addition, as illustrated in FIG. 6, the conductive member 500 includes a body 510 including a rod-shaped metallic plate, and a plurality of lamp adjacent portions 520 surrounding a portion of an edge of the lamp 410. do. In this case, as shown in the drawing, a recess is provided in the body 510 and a recess corresponding to the recess 520 is preferably formed. In addition, as illustrated in FIG. 7, the conductive member 500 includes a body 510 including a rod-shaped metallic plate, and a plurality of concave lamp adjacent parts 520 provided in the body 510. The plurality of lamp adjacent portions 520 of the concave shape are adjacent to the edge region of the lamp 410 to form a leakage capacitor. In addition, the present invention is not limited thereto, and it is preferable to form a rod-shaped metallic plate with the conductive member 500 to overlap the edge of the lamp and a part thereof. In this case, when the conductive member 500 uses a rod-shaped metallic plate, the conductive member 500 may be fixed to the bottom surface of the lower housing member 900 to prevent the conductive member 500 from moving.

Here, the capacitance of the leakage capacitor is changed according to the width of the overlapped area of the lamp 410 and the conductive member 500 and the separation interval therebetween. Therefore, in the present embodiment, it is preferable that the width of the overlapping area is 0.1 mm to 30 mm, and the separation interval is 0.01 mm to 30 mm.

The conductive member 500 is not limited to the above description, and may be provided to surround the ends of the plurality of lamps 410 or may be provided to be adjacent to at least one end of the plurality of lamps 410. As shown in FIG. 2, the conductive member 500 of the present exemplary embodiment may be provided in an edge region of the lamp 410 covered by the lamp fixing means 600. Of course, the conductive member 500 may be provided in the area around the lamp 410.

8 and 9 are graphs of the test results of the lighting time of the lamp unit of the backlight assembly.

8 is a graph illustrating a test result of a lighting time of the lamp unit 400 when the conductive member is not provided, and FIG. 9 is a lamp unit in which the conductive member 500 is provided around the lamp unit 400. It is a result of testing the lighting time of (400). In FIG. 9, 5 mm silver foil was connected to all the lamps 410 to prepare the conductive member 500, and the experiment was performed.

In the case of FIG. 8, when the maximum lamp lighting time is 280 ms, the average lighting time is 245.7 ms and the standard deviation is 11.7. And there were 1419 defects per million defects. However, in the case of FIG. 9, when the maximum lamp lighting time was 280 ms, the average lighting time was 240 ms and the standard deviation was 7.97. In addition, 0.21 defects occurred per million. If the minimum delay time for the lamps to turn on together in parallel operation was 280 ㎲, 1419 defects per 1 million defects of the backlight assembly would be generated if there was no conductive member, but if 1 million units were provided if the conductive members were provided. 0.21 defects can be generated to reduce the defective rate.

The present invention is not limited to the above description, and the conductive member may be provided on one side of the lamp fixing means in contact with the lamp. Hereinafter, a liquid crystal display according to a second exemplary embodiment of the present invention in which a conductive member is provided in the lamp fixing means will be described. The description overlapping with the above description will be omitted.

10 is an exploded perspective view of a liquid crystal display according to a second exemplary embodiment of the present invention. 11 is a cross-sectional view after the liquid crystal display of the second embodiment is coupled.

12 is a perspective view showing a part of the lamp fixing means according to the present embodiment.

10 and 11, the liquid crystal display according to the present exemplary embodiment includes a liquid crystal display panel 100, a display assembly 1000 including a driving circuit unit 200, and a display assembly 1000 that irradiates light to the display assembly 1000. And a backlight assembly 2000, an upper accommodating member 300, and a liquid crystal panel support means 350.

The backlight assembly 2000 supports and fixes the lamp unit 400 for generating light and the lamp unit 400, and fixes the lamp in which the conductive member 500 is provided on at least one side surface adjacent to the lamp unit 400. Means 600, a diffuser plate 700 and an optical plate 800 disposed on the lamp fixing means 600, a lamp unit 400, a lamp fixing means 600, a diffuser plate 700, and an optical And a lower accommodating member 900 for accommodating the plate 800.

The lamp unit 400 includes a plurality of lamps 410 disposed at equal intervals, and lamp holders 420 provided at both ends of the lamp 410. In this embodiment, the lamp 410 is disposed such that the longitudinal direction of the lamp 410 is perpendicular to the long axis direction of the lower housing member 900. This allows for a larger number of lamps than the previous embodiment. As a result, the luminance of the liquid crystal display may be improved. Here, since the lamp holder 430 is directly connected to the lower housing member 900, it is preferable to manufacture the lamp holder 430 using a shock absorbing material.

The lamp fixing means 600 is manufactured in a rectangular frame shape with an open lower portion as shown in FIG. 10, and a fixing part 640 and a recess for supporting and fixing the lamp holder 420 of the lamp unit 400. The unit 650 may be provided, and the conductive member 500 may be disposed in an area of the lamp fixing means 600 that contacts the lamp 410 of the lamp unit 400. Through this, the leakage capacitor may be provided on one side of the lamp 410 through the conductive member 500 provided in the lamp fixing means 600.

The lamp fixing means 600 includes an upper wall 610, an outer wall 620, and an inner wall 630, as shown in FIG. 12, and a fixing part between the outer wall 620 and the inner wall 630. 640 is provided. In addition, a recess 650 in which a portion of the inner wall 630 is cut is provided, and a lamp 410 is drawn into the recess 650. In the present embodiment, it is preferable that the conductive member 550 is provided along the lower surface of the inner wall 630. As a result, the conductive member 500 overlaps the lamp 410 in the recess 650 through which the lamp 410 passes to provide a leakage capacitor.

In addition, a plurality of fixing means 950 may be provided in the lower accommodating member 900 to support the lamp unit 400 to prevent damage due to drooping and external impact of the lamp unit 400. In addition, a leakage capacitor may be formed by providing a conductive member connected to one side of the plurality of fixing means 950. The fixing means 950 may be supported by a plurality of single lamp unit 400 in the above.

The conductive member 500 preferably uses a thin film-like metallic material. The conductive member 500 may be formed by attaching a metallic thin film with a predetermined adhesive material along the bottom step of the inner wall of the lamp fixing means 600. In addition, a metallic material may be formed on the bottom surface of the inner wall of the lamp fixing means 600 through local coating or plating.

In addition, the present invention is not limited to the above description, and the conductive member may be provided at one edge of the diffusion plate and the optical plate provided on the lamp. Hereinafter, a liquid crystal display according to a third exemplary embodiment of the present invention in which a conductive member is provided on one side of the diffusion plate will be described. Descriptions overlapping with the above-described embodiments will be omitted.

13 is an exploded perspective view of a liquid crystal display according to a third exemplary embodiment of the present invention. 14 is a cross-sectional view after the liquid crystal display of the third embodiment is coupled.

13 and 14, the liquid crystal display according to the present exemplary embodiment may emit light onto the display assembly 1000 including the liquid crystal display panel 100, the driving circuit unit 200, and the display assembly 1000. And a backlight assembly 2000, an upper accommodating member 300, and a liquid crystal panel support means 350.

The backlight assembly 2000 includes a lamp unit 400 for generating light, lamp fixing means 600 for supporting and fixing the lamp unit 400, and a lamp unit 400 disposed on the lamp unit. The diffusion plate 700 provided with the conductive member 500, the optical plate 800 provided on the diffusion plate, the lamp unit 400, the lamp fixing means 600, the diffusion plate 700, and the optical plate 800. ), A lower accommodating member 900 for accommodating the same.

It is effective to provide the conductive member 500 by attaching a thin metal film to at least one side of the edge of the diffusion plate 700 using an adhesive. In this case, it is preferable that the conductive member 500 is provided in the power input end region of the lamp 410 of the lamp unit 400. If the power input ends are respectively provided at both sides, as shown in the drawing, the diffusion plate ( It is preferable that the conductive member 500 is provided at both edges of the 700. Through this, by providing a conductive member 500 under the diffusion plate 700 provided above the lamp 410 to form a leakage capacitor in the upper region of the lamp 410 to improve the lighting efficiency of the lamp 410, a plurality of lamps The uniformity of lighting between 410 can be improved.

Of course, the present invention is not limited to the above description, and the conductive member may be provided above the diffusion plate or may be provided on the optical plate.

As described above, the present invention can arrange the conductive member in the edge region of the plurality of lamps to shorten the lighting time of the lamp, and reduce the variation in the lighting time between the plurality of lamps.

In addition, the conductive member may be used to increase the efficiency of the lamp without increasing the weight of the backlight assembly by using a thin film metal film.

Although the invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the invention is not limited thereto, but is defined by the claims that follow. Accordingly, one of ordinary skill in the art may variously modify and modify the present invention without departing from the spirit of the following claims.

Claims (9)

A plurality of lamps for driving in parallel; A conductive member provided around an edge region of the plurality of lamps; And an accommodation member accommodating the plurality of lamps and the conductive member. The method according to claim 1, The conductive member is provided around the edge region adjacent to the power input terminal of the lamp. The method according to claim 1 or 2, The conductive member may include a metallic thin film or metallic plate overlapping edge portions of each of the plurality of lamps with a portion thereof. The method according to claim 3, The metallic thin film or the metallic plate includes a ring-shaped adjacent portion or a concave-shaped adjacent portion overlapping the edge region of the lamp. The method according to claim 1 or 2, And a lamp holder provided at both ends of the plurality of lamps, and lamp fixing means provided at both edges of the lamp to fix the lamp holder. The method according to claim 5, And the conductive member is provided between the lamp holder and the lamp fixing means. The method according to claim 5, And the conductive member is provided in the lamp fixing means overlapping the plurality of lamps. The method according to claim 1 or 2, And a diffuser plate provided on the plurality of lamps, wherein the conductive member is provided at at least one edge of the diffuser plate. A backlight assembly including a plurality of lamps generating light through parallel driving, a conductive member provided around an edge region of the plurality of lamps, and a housing member accommodating the plurality of lamps and the conductive members; And a liquid crystal display panel configured to display an image using light supplied from the backlight assembly.

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