KR20070056495A - Back light assembly and liquid crystal display apparatus having the same - Google Patents

Abstract

A backlight assembly and an LCD(Liquid Crystal Display) having the same are provided to prevent the increase of working time due to an increase in the number of connectors, thereby improving the assembling efficiency of the LCD, by connecting lamp wires to a connector in a single body. An inverter(400) is disposed on a rear surface of a container(200) to generate a driving power. Lamps(310) are contained at both side portions within the container to generate lights in response to the driving power. A light guiding plate(500) guides lights emitted from the lamps. Lamp wires(320) have first ends respectively connected to the lamps and second ends extracted to the outside of the container. A first connector(340) is connected to the second ends of the lamp wires in a single body. A second connector(410) is formed on the inverter, and joined to the first connector.

Description

BACK LIGHT ASSEMBLY AND LIQUID CRYSTAL DISPLAY APPARATUS HAVING THE SAME}

1 is an exploded perspective view showing a backlight assembly according to an embodiment of the present invention.

FIG. 2 is a rear perspective view illustrating a rear surface of the backlight assembly shown in FIG. 1.

3 is a side view showing the side of FIG.

4 is a cross-sectional view taken along the line II ′ of FIG. 1.

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

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

100: backlight assembly 200: storage container

230: groove forming side 234: groove

310: lamp 320: lamp wire

340: first connector 400: inverter

410: second connector 500: light guide plate

600: liquid crystal display device 700: display unit

710: liquid crystal display panel 720: driving circuit portion

800: top chassis

The present invention relates to a backlight assembly and a liquid crystal display device having the same. More particularly, the present invention relates to a backlight assembly and a liquid crystal display device having the same.

In general, a liquid crystal display (Liquid Crystal Display) is a flat panel display device that displays an image using a liquid crystal (Liquid Crystal), is thinner and lighter than other image display devices, has a low driving voltage and low power consumption It has advantages and is widely used throughout the industry.

Such a liquid crystal display device requires a backlight assembly for supplying light to the liquid crystal display panel because the liquid crystal display panel which displays an image does not emit light by itself.

The backlight assembly is classified into a direct type and an edge type according to the position of the light source. The direct type is a structure in which a plurality of lamps are arranged under the liquid crystal display panel, which is advantageous for high luminance of the product. On the other hand, the edge type is a structure in which a light source such as a lamp or a light emitting diode (LED) is disposed on the side of the light guide plate, and is advantageous in thinning a product.

At least one elongated cylindrical lamp is used in an edge type backlight assembly. The lamp is connected to the inverter by lamp wires, and receives lamp driving power from the inverter to generate light. At this time, the lamp wires and the inverter are connected via a connector.

However, since the connector is arranged in correspondence with the number of lamps, when the number of lamps increases, the time required for fastening and dismantling the connectors increases. Since the backlight assembly is carried out by dismantling the connector during the driving test, the final test and the reassembly, the increase in the quantity of the connector causes the increase of the working time. In addition, since the lamp wires are drawn out, the lamp wires are cut or broken during the assembly process.

Accordingly, the present invention has been made in view of the above problems, and the present invention provides a backlight assembly that can improve assembly performance by using a connector that integrally couples lamp wires.

In addition, the present invention provides a liquid crystal display device having the above-described backlight assembly.

The backlight assembly according to the above-described aspect of the present invention includes an accommodating container, an inverter disposed on a rear surface of the accommodating container to generate driving power, and accommodated at both sides of the accommodating container and generating light in response to the driving power. Lamps, one end is connected to the lamp, the other end is formed on the lamp wires that are drawn out of the outer container, the first connector is connected to the other end of the lamp wires integrally, and the inverter, the first And a second connector coupled with the connector.

A groove on which the lamp wires are mounted is formed on the outer surface of the storage container.

According to an aspect of the present invention, a liquid crystal display (LCD) includes a backlight assembly for supplying light, a liquid crystal display panel for displaying an image using light supplied from the backlight assembly, and a top chassis for fixing the liquid crystal display panel to the backlight assembly. It includes.

The backlight assembly may include an accommodating container, an inverter disposed on a rear surface of the accommodating container to generate driving power, and lamps stored in both sides of the accommodating container and generating light in response to the driving power, one end of which is connected to the lamp. A second connector connected to the other end, the lamp wires drawn out of the storage container, a first connector to which the other ends of the lamp wires are integrally connected, and a second connector formed on the inverter and coupled to the first connector. do.

A groove on which the lamp wires are mounted is formed on the outer surface of the storage container.

According to the backlight assembly and the liquid crystal display having the same, since the lamp wires are integrally connected to the connector, it is possible to prevent the increase of the work time due to the increase in the number of connectors. In addition, since the lamp wires are mounted in the grooves, defects of the lamp wires are prevented, and the assemblability of the liquid crystal display device is improved.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view showing a backlight assembly according to an embodiment of the present invention, Figure 2 is a rear perspective view showing the back of the backlight assembly shown in FIG.

1 and 2, the backlight assembly 100 includes a storage container 200, a lamp unit 300, an inverter 400, and a light guide plate 500.

The storage container 200 includes a bottom surface 210 and side portions 220 extending from an edge of the bottom surface 210 to provide a storage space. The lamp unit 300 and the optical member, etc. are accommodated in the accommodation space.

The groove forming side portion 230 of the side portions 220 has a drawing hole 232 for drawing lamp wires 320 to the outside at both edges. In addition, the outer surface of the groove forming side 230 is formed with a groove 234 in which the lamp wires 320 drawn out from the drawing hole 232 are mounted. The groove 234 starts from the withdrawal hole 232, and the lamp wires 320 mounted in the groove 234 are led out to the rear surface 240 of the storage container 200 at the center of the outer surface of the groove forming side 230. It is formed to be.

The depth of the groove 234 is formed to be larger than the diameter of the lamp wire 320 to accommodate and protect the lamp wires 320.

The lamp unit 300 includes lamps 310, lamp wires 320, lamp covers 330, and a first connector 340.

The lamps 310 are accommodated in both side portions 220 perpendicular to the groove-forming side portion 230 of the storage container 200 and generate light in response to a driving power source from the inverter 400. Two lamps 310 are disposed at each of the two side parts 220 of the storage container 200. Alternatively, one or three lamps 310 may be disposed on both side portions 220 of the storage container 200. The lamps 310 are made of, for example, a cold cathode fluorescent lamp (CCFL) having an elongated cylindrical shape.

Meanwhile, in order to apply driving power to the lamp 310, the first lamp wire 322 is connected to one end of the lamp 310, and the second lamp wire 324 is connected to the other end of the lamp 310. The second lamp wire 324 is drawn out to one end of the lamp 310 to which the first lamp wire 322 is connected to the outside of the lamp cover 330.

The lamp covers 330 are disposed one by one on both sides 220 of the storage container 200 corresponding to the storage positions of the lamps 310. The lamp cover 330 covers the three surfaces of the lamps 310 to protect the lamps 310. The lamp cover 330 is made of a metal having a high reflectance or has a structure in which a reflective material having a high reflectance is coated on an inner surface of the metal. The lamp cover 330 reflects the light generated by the lamps 310 toward the light guide plate 500 to improve light utilization efficiency.

The other ends of the first and second lamp wires 322 and 324 are connected to the first connector 340. The first connector 340 is integrally connected with the lamp wires 320. Therefore, the time for coupling and disassembly is saved compared to using a plurality of connectors connected one by one for each of the first and second lamp wires 322 and 324.

The inverter 400 is disposed on the rear surface 240 of the storage container 200 to generate driving power to the lamps 310. Specifically, the inverter 400 changes the low-potential AC power applied from the outside into a high-potential AC power suitable for driving the lamps 310 to output the driving power. The inverter 400 includes a second connector 410 for delivering driving power to the lamps 310.

The second connector 410 is fastened to the first connector 340 to apply driving power to the lamps 310. The second connector 410 is fixed on the inverter 400. Therefore, the second connector 410 is engaged or disassembled with the first connector 340 according to the handling of the first connector 340.

The light guide plate 500 guides light from the lamps 310 disposed on the side portion 220 in an upward direction. The light guide plate 500 is made of a transparent material for guiding light. For example, the light guide plate 500 is made of polymethyl methacrylate (PMMA) material.

A predetermined diffusion pattern (not shown) for scattering reflection of light is formed on the bottom surface of the light guide plate 500. For example, the diffusion pattern consists of a printing pattern or an uneven pattern. Light incident from the lamps 310 into the light guide plate 500 is scattered and reflected by the diffusion pattern, and light exceeding a specific critical angle is emitted through the top surface of the light guide plate 500.

Meanwhile, the backlight assembly 100 further includes a reflective sheet 510 disposed under the light guide plate 500 and at least one optical sheet 520 disposed over the light guide plate 500.

The reflective sheet 510 reflects light leaking into the lower portion of the light guide plate 500 to improve light utilization efficiency. The reflective sheet 510 is made of a material having high light reflectance. On the other hand, when the bottom surface 210 itself of the storage container 200 is made of a material having a high light reflectance, the reflective sheet 510 may be removed.

The optical sheet 520 improves luminance characteristics of light emitted upward from the light guide plate 500. The optical sheet 520 may include a diffusion sheet 522 to diffuse light emitted from the light guide plate 500 to improve luminance uniformity.

In addition, the optical sheet 520 may include a prism sheet 524 that condenses the light emitted from the light guide plate 500 in the front direction to improve the front brightness of the light.

On the other hand, the backlight assembly 100 may further include an optical sheet 520 of various functions according to the characteristics of the light required.

3 is a side view showing the side of FIG.

Referring to FIG. 3, the groove forming side 230 has a drawing hole 232 for drawing out the lamp wires 320 at both ends. The groove 234 for mounting the lamp wires 320 is formed on the outer surface of the groove forming side 230 from the withdrawal hole 232, and is formed horizontally toward the center of the groove forming side 230. The groove 234 is formed such that the lamp wires 320 are led out to the rear surface 240 at the center portion of the groove forming side 230. At this time, the grooves 234 formed from both withdrawal holes 232 meet at the central portion of the groove forming side 230 and are combined, and the width of the combined grooves 234 is the lamp wire 320 received through both grooves 234. Sufficient space is provided for them to be combined and mounted. Since the lamp wires 320 are mounted in the grooves 234, the lamp wires 320 may be prevented from being cut or damaged by the lamp wires 320 generated during the assembly process.

Two lamps 310 are disposed on each side 220. Therefore, each of the grooves 234 is provided with two first lamp wires 322 and two second lamp wires 324.

The lamp wires 320 are led to the rear surface 240 at the center of the groove forming side 230. The drawn lamp wires 320 are all connected to and integrated with the first connector 340. Therefore, the time for coupling and disassembly is saved compared to using a plurality of connectors connected one by one for each of the first and second lamp wires 322 and 324.

The second connector 410 is located at the center of the groove forming side 230 and is fixed to the inverter 400. Since the first connector 340 is not fixed in position, the first and second connectors 340 and 410 are engaged or disassembled according to the handling of the first connector 340.

4 is a cross-sectional view taken along the line II ′ of FIG. 1.

Referring to FIG. 4, the groove 234 is formed to accommodate all of the lamp wires 320. At this time, the depth of the groove 234 is formed larger than the diameter of the lamp wire 320 for the protection of the lamp wires (320). The groove 234 in which the lamp wires 320 are mounted is then covered and fixed by the top chassis 800 (FIG. 5).

The lamp wires 320 are mounted in the grooves such that the second lamp wires 324 are disposed between the first lamp wires 322 for ease of assembly.

The groove 234 is formed to have a trapezoidal shape in cross section. Alternatively, the groove 234 may be formed to have a rectangular cross section.

Meanwhile, the groove 234 may be formed to correspond to the quantity of the lamp wire 320. Specifically, the grooves 234 are formed in accordance with the number of the lamp wires 320 so that the lamp wires 320 are mounted one by one in the grooves 234.

5 is an exploded perspective view illustrating a liquid crystal display according to an exemplary embodiment of the present invention. In the present embodiment, since the backlight assembly is the same as that shown in FIG. 1, the same reference numerals are used, and detailed description thereof will be omitted.

Referring to FIG. 5, the liquid crystal display 600 according to the exemplary embodiment includes a backlight assembly 100, a display unit 700, and a top chassis 800.

The display unit 700 includes a liquid crystal display panel 710 for receiving light from the backlight assembly 100 and displaying an image, and a driving circuit unit 720 for driving the liquid crystal display panel 710.

The liquid crystal display panel 710 is disposed above the optical sheet 520. The liquid crystal display panel 710 includes a first substrate 712, a second substrate 714 coupled to the first substrate 712, and a liquid crystal disposed between the first substrate 712 and the second substrate 714. Layer (not shown).

The first substrate 712 is a transparent glass substrate in which thin film transistors (hereinafter referred to as TFTs) to which pixel electrodes are connected are formed in a matrix form. The second substrate 714 is a glass substrate in which RGB pixels for color are formed by a thin film process, and a common electrode made of a transparent conductive material is formed.

Accordingly, when power is applied to the TFT, the liquid crystal display panel 710 has an electric field formed between the pixel electrode and the common electrode, and is interposed between the first substrate 712 and the second substrate 714 by the electric field. The arrangement of the liquid crystal molecules of the liquid crystal layer (not shown) is changed, and the transmittance of light is changed according to the arrangement change of the liquid crystal molecules to display a desired image.

The driving circuit unit 720 is a data driving circuit connecting the source printed circuit board 722 to output various control signals for driving the liquid crystal display panel 710, and the source printed circuit board 722 and the liquid crystal display panel 710. And a gate driving circuit film 726 connected to the low film 724 and the liquid crystal display panel 710.

The data driving circuit film 724 and the gate driving circuit film 726 may output driving signals for driving the liquid crystal display panel 710 in response to a control signal supplied from the source printed circuit board 722. ). The data driving circuit film 724 and the gate driving circuit film 726 are made of, for example, a tape carrier package (TCP) or a chip on film (COF).

The driving circuit 720 may further include a gate printed circuit board (not shown) connected to the gate driving circuit film 726.

The top chassis 800 is coupled to the storage container 200 while surrounding the edge of the liquid crystal display panel 710 to fix the liquid crystal display panel 710 to the upper portion of the backlight assembly 100. The top chassis 800 is made of a metal with little deformation and excellent strength.

The top chassis 800 is coupled to the storage container 200 and covers the groove-forming side 230 of the storage container 200 in which the lamp wires 320 are mounted. Accordingly, the top chassis 800 prevents the flow of the lamp wires 320 mounted in the groove 234 of the storage container 200 and protects the lamp wires 320.

According to such a backlight assembly and a liquid crystal display device having the same, since lamp wires are integrally connected to the connector, it is possible to prevent an increase in work time due to an increase in the number of connectors. In addition, since the lamp wires are mounted in the grooves, stamping or breakage of the lamp wires is prevented during the assembly process. Therefore, the assemblability of the liquid crystal display device is improved.

In the detailed description of the present invention described above with reference to the preferred embodiments of the present invention, those skilled in the art or those skilled in the art having ordinary skill in the art will be described in the claims to be described later It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

Claims (7)

Storage container; An inverter disposed on a rear surface of the storage container to generate driving power; Lamps stored at both sides of the storage container and configured to generate light in response to the driving power; A light guide plate for guiding light from the lamps; Lamp wires having one end connected to the lamp and the other end drawn out of the storage container; A first connector to which the other ends of the lamp wires are integrally connected; And And a second connector formed on the inverter and coupled to the first connector. The backlight assembly of claim 1, wherein the outer surface of the storage container has a groove in which the lamp wires are mounted. The backlight assembly of claim 2, wherein the groove is formed such that the lamp wires are led out from the center portion of the outer surface of the storage container to the rear surface of the storage container. The backlight assembly of claim 1, wherein two lamps are disposed at both sides of the storage container. A backlight assembly for supplying light; A liquid crystal display panel displaying an image using light supplied from the backlight assembly; And A top chassis fixing the liquid crystal display panel to the backlight assembly; The backlight assembly, Storage container; An inverter disposed on a rear surface of the storage container to generate driving power; Lamps stored at both sides of the storage container and configured to generate light in response to the driving power; A light guide plate for guiding light from the lamps; Lamp wires having one end connected to the lamp and the other end drawn out of the storage container; A first connector to which the other ends of the lamp wires are integrally connected; And And a second connector formed on the inverter and coupled to the first connector. The liquid crystal display of claim 5, wherein a groove in which the lamp wires are mounted is formed on an outer surface of the storage container. The liquid crystal display of claim 6, wherein the top chassis covers the outer surface on which the lamp wires are mounted.

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