KR20040103257A - Receiving container for liquid crystal display apparatus, backlight assembly having the same and liquid crystal display apparatus using the same - Google Patents

Abstract

A storage container, a backlight assembly having the same, and a liquid crystal display device are disclosed. The side wall of the storage container is bent twice from the bottom surface to receive the lamp, and reflects the light incident from the lamp stored on the side wall of the storage container back to the light guide plate side. Heat generated from the lamp is directly conducted to the storage container and released to the outside of the liquid crystal display. Accordingly, the liquid crystal display device can reduce the internal temperature to improve display quality, and reduce the number of assembly parts and the number of assembly processes to reduce production costs.

Description

Storage container for liquid crystal display device, backlight assembly and liquid crystal display device having the same TECHNICAL TECHNICAL FIELD

The present invention relates to a storage container for a liquid crystal display device, a backlight assembly and a liquid crystal display device having the same, and more particularly to a storage container for a liquid crystal display device for reducing the number of assembly parts and to reduce the internal temperature. It relates to a display device.

In general, the liquid crystal has both an electrical characteristic in which the arrangement is changed in accordance with the direction and intensity of the electric field and an optical characteristic in which the transmittance of light is changed in response to the arrangement.

The liquid crystal display displays an image using a liquid crystal having electrical characteristics.

1 is a cross-sectional view showing the structure of a conventional liquid crystal display device.

Referring to FIG. 1, a conventional liquid crystal display device 95 includes a liquid crystal display panel 100 for displaying an image, a backlight assembly 90 for providing light to the liquid crystal display panel 100, and a first mold frame. 70 and a second mold frame 75 and a top chassis. More specifically, the liquid crystal display panel 10 has a TFT substrate having a pixel electrode and a common electrode facing the pixel electrode for controlling the liquid crystal. It includes a color filter substrate.

The backlight assembly 90 includes lamps 20 that generate light, a lamp reflector 25, a light guide plate 30, optical sheets 40, a reflector plate 50, and a storage container 60. The lamps 20, the lamp reflector 25, the light guide plate 30, the optical sheets 40, and the reflector plate 50 are accommodated in the storage container 60, and the storage container 60 is the first mold frame 70. The first mold frame 70 is coupled to the second mold frames 70 and 75.

Specifically, the lamps 20 are located on the side of the light guide plate 30, the lamp reflector 25 houses the lamps 20 and reflects light incident from the lamps 20 toward the light guide plate 30 side. Thereby improving light utilization efficiency.

The light guide plate 30 changes the path of the light incident from the lamps 20 and the lamp reflector 25 and emits light toward the liquid crystal display panel 10 with a more uniform distribution of light. The optical sheets 40 are interposed between the liquid crystal display panel 10 and the light guide plate 40 to more uniformly distribute the distribution of light emitted from the light guide plate 30 to provide the liquid crystal display panel 10.

The reflective plate 50 is interposed between the light guide plate 30 and the storage container 60 to reflect the light leaked from the light guide plate 30 to increase the utilization efficiency of the light. The storage container 60 accommodates the first and lamps 20, the lamp reflector 25, the reflecting plate 50, the light guide plate 30, and the optical sheets 40.

The liquid crystal display panel 10 is accommodated in the second mold frame 75, and the top chassis 80 is coupled to the second mold frame 75 while covering the display surface of the liquid crystal display panel 10 to be opened.

The lamps 20 additionally release heat when they generate light. The heat raises the internal temperature of the liquid crystal display device 90. In the liquid crystal display panel 10, when the internal temperature of the liquid crystal display device 90 changes, the liquidity of the liquid crystal and the refractive index of the liquid crystal are changed to change the luminance. Therefore, the liquid crystal display 90 must quickly discharge heat generated from the lamps 20 to the outside in order to keep the internal temperature uniform.

However, since heat emitted from the lamps 20 is conducted to the lamp reflector 25, the container 60, the first and second mold frames 70 and 75 and the top chassis 80, the heat is emitted to the outside. As a result, the time taken for heat dissipation is delayed by the number of parts passing. In addition, there is a problem in that a large number of parts constituting the liquid crystal display device takes a long time to assemble and the production cost increases.

A first object of the present invention is to provide a storage container for a liquid crystal display device for efficiently dissipating heat generated from a lamp by reducing the number of assembly parts.

A second object of the present invention is to provide a backlight assembly having a storage container for the liquid crystal display device.

A third object of the present invention is to provide a liquid crystal display device having the backlight assembly.

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

2 is a perspective view illustrating a storage container for a liquid crystal display according to an exemplary embodiment of the present invention.

3 is a cross-sectional view illustrating a backlight assembly according to an exemplary embodiment of the present invention.

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

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

FIG. 6 is a perspective view of the LCD shown in FIG. 5 upside down.

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

100: storage container 200: backlight assembly

300: liquid crystal display panel assembly 400: mold frame

500: top chassis 600: liquid crystal display device

In order to realize the first object of the present invention, the present invention provides a bottom surface, which extends from an edge of the bottom surface and includes at least one first sidewall portion for forming an accommodation space and at least one first sidewall portion among the first sidewall portions. Provided is a storage container for a liquid crystal display device comprising a second side wall portion extending to face the bottom surface to form a lamp storage space.

In order to implement the second object of the present invention, the present invention provides a backlight assembly including a storage container, a lamp for generating light, and a light guide plate. At this time, the storage container extends to face the bottom surface from the first sidewall portions for extending the bottom surface, the edge of the bottom surface to form a storage space, and at least one of the first sidewall portions. It has a second side wall portion for forming a lamp receiving space. The lamp is disposed in the lamp receiving space. The light guide plate has a light incidence surface facing the lamp, a light reflection surface in contact with the bottom surface, and a light emission surface facing the light reflection surface. In order to realize the third object of the present invention, the present invention uses a liquid crystal. A liquid crystal display panel comprising a liquid crystal display panel for displaying an image, a first accommodating container, a lamp for generating light, and a light guide plate is provided. In this case, the first storage container faces the bottom surface from at least one first sidewall portion among the first sidewall portions and the first sidewall portions extending from an edge of the bottom surface to form a storage space. It has a second side wall portion for extending to form a lamp receiving space. The lamp is disposed in the lamp receiving space. The light guide plate has a light incidence surface facing the lamp, a light reflection surface in contact with the bottom surface, and a light emission surface for facing the light reflection surface and emitting the light to the liquid crystal display panel.

According to the present invention, since the number of assembly parts required to complete the liquid crystal display device can be reduced, the heat generated from the lamp can be effectively discharged to the outside of the liquid crystal display device, so that a constant luminance can be maintained and the display quality can be improved. .

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

Embodiment of storage container for liquid crystal display device

2 is a perspective view illustrating a storage container for a liquid crystal display according to an exemplary embodiment of the present invention.

2, the storage container 100 according to the present exemplary embodiment includes a bottom surface 110, first sidewall portions 120, and a second sidewall portion 130. Preferably, the storage container 100 is formed of a hard and light metal material, such as aluminum or aluminum alloy, in order to discharge the heat generated incidentally as the lamp is driven to the outside.

In the present embodiment, the bottom surface 110 preferably has a rectangular plate shape.

The first side wall portions 120 extend at a predetermined height in the same direction from each edge of the bottom surface 110.

The second sidewall portion 130 extends from the at least one first sidewall portion of the first sidewall portions 120 to face the bottom surface 110 to form a lamp receiving space 140. In FIG. 1, the second sidewall portion 130 is formed on one first sidewall portion, but the second sidewall portion 130 includes all the first sidewall portions 130 on which the lamp is disposed among the first sidewall portions 130. ) May be formed. Therefore, the second sidewall portion 130 may be formed on two first sidewall portions facing each other for higher brightness.

A lamp (not shown) is disposed in the lamp accommodation space 140, and the first sidewall portion on which the second sidewall portion 130 is formed reflects light incident from the lamp to the outside of the lamp accommodation space 140.

In this embodiment, the storage container 100 performs the lamp storage function and the function of the lamp reflector at the same time, thereby reducing the number of assembly parts required to improve the storage and light efficiency of the lamp, and the heat generated from the lamp Can be released efficiently.

Embodiment of the backlight assembly

3 is a cross-sectional view illustrating a backlight assembly according to an exemplary embodiment of the present invention. Since the storage container according to the present embodiment is the same as the storage container 100 according to the embodiment of the storage container for the liquid crystal display device, the same reference numerals will be used and the description thereof will be omitted.

Referring to FIG. 3, the backlight assembly 200 includes a storage container 100, a plurality of lamps 210, a light guide plate 220, optical films 230, and a reflective sheet 240. In the lamps 210, the lamps 210 may include a first lamp 211 and a second lamp 212, and may be disposed in the lamp accommodation space 140. The first lamp 211 and the second lamps 211 and 212 have a lamp tubing portion and an electrode portion. The lamp tube is coated with a fluorescent material on the inner wall, and the discharge gas is injected into the lamp tube. Electrode portions are formed at both ends of the lamp tube to apply driving power to the lamp tube.

The light guide plate 220 is disposed on the bottom surface 110 of the storage container 100. The light guide plate 220 may include a light incident surface 221 to which light emitted from the lamps 210 is incident, a light reflecting surface 212 and a light reflecting surface 212 that contact the bottom surface 110, and may face each other. 213).

The optical films 230 are disposed on the light exit surface 213 to diffuse and exit the light emitted from the light guide plate 220.

The reflective sheet 240 is interposed between the light reflection surface 212 and the bottom surface 110 to reflect the light leaked from the light reflection surface 212 back to the light reflection surface 212. An adhesive member is interposed between the reflective sheet 240 and the bottom surface 110 to attach the reflective sheet 240 to the storage container 100.

According to the present embodiment, the backlight assembly 200 is a storage container 100, a plurality of lamps 210, the light guide plate 220, the optical film 230, the sheet number is excellent, the assembly directionality and heat dissipation efficiency is excellent And a reflective sheet 240. The heat generated from the lamps 210 is directly conducted to the storage container 100 without passing through a plurality of assembly parts and is discharged to the outside of the backlight assembly 200. Accordingly, the backlight assembly 200 can reduce the temperature and improve the display quality.

Embodiment of liquid crystal display device

4 is an exploded perspective view of a liquid crystal display according to an exemplary embodiment of the present invention. 5 is a cross-sectional view taken along the line II of FIG. 4. This embodiment is the same as the above-described embodiment of the backlight assembly except for the liquid crystal display panel assembly 300, the mold frame 400, and the top chassis 600. Therefore, the same members will be denoted by the same reference numerals as in the embodiment of the backlight assembly, and redundant description thereof will be omitted. Referring to FIGS. 4 and 5, the liquid crystal display 600 according to the present embodiment is a liquid crystal device. The display panel assembly 300 includes a backlight assembly 200, a mold frame 400, and a top chassis 500.

The liquid crystal display panel assembly 300 includes a liquid crystal display panel 310, a data side and gate side tape carrier packages (TCP) 320 and 330, and a printed circuit board 340. Numeral 310 displays an image using the electrical characteristics of the liquid crystal. The liquid crystal display panel 310 includes first and second substrates 311 and 312 and a liquid crystal layer (not shown). The first substrate 210 includes a transparent pixel electrode and a voltage applying device for applying a pixel voltage to the pixel electrode. The second substrate 312 is coupled to the first substrate 311 so as to face each other, and a transparent common electrode is formed on a surface facing the first substrate 311. The liquid crystal layer is interposed between the first and second substrates 311 and 312.

On the source side of the first substrate 311, the data side TCP 320 for determining when to apply the data driving signal is attached. The gate side TCP 330 is attached to the gate side of the first substrate 311 to determine an application timing of the gate driving signal. The data side TCP 320 and the gate side TCP 330 are connected to the printed circuit board 340 and the first substrate 311 to electrically connect the printed circuit board 340 and the first substrate 311. The backlight assembly 200 includes a storage container 100, a plurality of lamps 210, a light guide plate 220, optical films 230, and a reflective sheet 240, and displays an image on the liquid crystal display panel 310. Provides the light needed to

The mold frame 400 is disposed between the liquid crystal display panel assembly 300 and the backlight assembly 200. The mold frame 400 has an open bottom plate and sidewalls extending from an edge of the bottom plate to form a panel storage space. In this case, the liquid crystal display panel 310 is seated in the panel storage space.

As shown in FIG. 5, the sidewalls of the mold frame 400 are in contact with the second sidewall portion 130 of the storage container 100. Guide grooves 410 are formed on sidewalls of the mold frame 400 to accommodate the first lines 11 and 12 among the lamp wires. The lamp wire is connected to the lamps 210 to supply power to the lamps 210. The lamp wire is composed of first lines 11 and 12 to which a low voltage is applied and a second line (not shown) to which a high voltage is applied. In the present exemplary embodiment, the first lines 11 and 12 are accommodated in the guide grooves 410 of the mold frame 400, but the first lines 11 and 12 are bottomed as shown in FIG. 6, which will be described later. It can also be stored in the back of 110.

The top chassis 500 covers the display surface of the liquid crystal display panel 310 so as to be opened, and is coupled to the storage container 100 to fix the liquid crystal display panel 310 to the mold frame 400.

Looking at the heat dissipation process of the liquid crystal display device 600 according to the present embodiment, first, heat generated from the plurality of lamps 210 is conducted to the storage container 100. Part of the heat conducted to the storage container 100 is immediately discharged to the outside of the liquid crystal display device 600, and the rest is conducted to the mold frame 400 and the top chassis 500 to the outside of the liquid crystal display device 600. Is released.

As such, the liquid crystal display 600 may efficiently discharge heat generated from the lamps 210 by the storage container 100 performing a function of a lamp reflector. Therefore, the liquid crystal display device 600 according to the present exemplary embodiment may reduce the increase in the internal temperature and prevent the luminance change of the liquid crystal display panel 210 to improve display quality.

FIG. 6 is a perspective view of the LCD shown in FIG. 5 upside down.

Referring to FIG. 6, the lamp wires 13a, 13b, 14a, and 14b are formed of the first lamp wires 13a and 13b and the second lamp wires 14a and 14b and the first sidewall of the storage container 100. It is bent along the outer surface of the portion 120 is seated on the rear surface of the bottom surface (110).

The first and second lamp wires 13a, 13b, 14a, 14b have first lines 13a, 14a and second lines 13b, 14b, respectively. Low voltage is applied to the first electrode lines 13a and 14a, and high voltage is applied to the second lines 13b and 14b.

The first lamp wires 13a and 13b are connected to both electrode portions of the first lamp 211 and the first connector 213. The second lamp wires 14a and 14b are connected to the positive electrode portion and the second connector 214 of the third lamp 212. The first and second connectors 213 and 214 are provided with a power supply (not shown). In combination with the power supply to the first and second lamp wires (13a, 13b, 14a, 14b). The first and second lamp wires 13a, 13b, 14a, and 14b apply power to the first and second lamps 211 and 212, and the first and second lamp wires 211 and 212 are applied to the applied power. Generates light in response.

As described above, according to the present invention, by storing the storage container as a function of the lamp reflector, the number of components required to configure the liquid crystal display device can be reduced. Accordingly, the liquid crystal display according to the present invention can reduce the number of components conducted until the heat generated from the lamp is discharged to the outside, it is possible to efficiently discharge heat. In addition, since the liquid crystal display device can maintain the internal temperature uniformly, the brightness of the liquid crystal display panel can be kept constant, and the display quality can be improved.

In addition, the liquid crystal display device can reduce the number of assembly parts, thereby reducing the production cost of the product, it is possible to improve the assembly.

Although described above with reference to the embodiments, those skilled in the art can be variously modified and changed within the scope of the present invention without departing from the spirit and scope of the invention described in the claims below. I can understand.

Claims (9)

A bottom side, first side wall portions extending from an edge of the bottom surface to form a storage space, and extending from the first side wall portion among at least one of the first side wall portions to face the bottom surface to form a lamp storage space; Storage container for a liquid crystal display device comprising a second side wall portion for. The container of claim 1, wherein the second sidewall portion is formed of two first sidewall portions facing each other among the first sidewall portions. A bottom surface, first sidewall portions extending from an edge of the bottom surface to form a storage space, and extending from the first sidewall portion of the first sidewall portions to face the bottom surface to form a lamp storage space; Receiving vessel having a second side wall portion for; A lamp disposed in the lamp receiving space; And And a light guide plate having a light incident surface facing the lamp, a light reflection surface in contact with the bottom surface, and a light exit surface facing the light reflection surface. 4. The apparatus of claim 3, further comprising a reflecting member disposed on the bottom surface to reflect light leaked from the light guide plate, and an adhesive for attaching the reflecting member to the bottom surface between the reflecting member and the bottom surface. Backlight assembly, characterized in that the member is interposed. 4. The backlight assembly of claim 3, further comprising an optical film disposed on the light exit surface. A liquid crystal display panel which displays an image using liquid crystals; A bottom surface, first sidewall portions extending from an edge of the bottom surface to form a storage space, and extending from the first sidewall portion of the first sidewall portions to face the bottom surface to form a lamp storage space; A first accommodating container having a second side wall portion for the same; A lamp disposed in the lamp accommodation space to generate light; And And a light guide plate having a light incidence surface facing the lamp, a light reflection surface in contact with the bottom surface, and a light emission surface facing the light reflection surface and emitting light to the liquid crystal display panel. 7. The liquid crystal display device according to claim 6, further comprising a second storage container interposed between the liquid crystal display panel and the first storage container to accommodate the liquid crystal display panel. The liquid crystal display of claim 7, wherein the second housing is connected to both ends of the lamp to form a groove for guiding a position of a lamp wire for applying power to the lamp. 7. The liquid crystal display of claim 6, wherein a lamp wire is connected to both ends of the lamp and is connected to the bottom of the bottom plate to apply power to the lamp.