KR20050092245A - Back light assembly and display device having the same - Google Patents

Abstract

A backlight assembly and a display device having the same for improving display quality are disclosed. The plurality of lamps generate light, and the light diffusing member is disposed above the lamps to uniform the luminance distribution of the light to the display panel. The receiving member sequentially stores the display panel, the light diffusing member and the plurality of lamps. The support member is integrally formed with the housing member and supports the light diffusing member to closely adhere the light diffusing member to the display panel. Therefore, since the light diffusing member is in close contact with the display panel by the support member, the flow of the light diffusing member can be prevented, so that the display quality can be improved.

Description

BACK LIGHT ASSEMBLY AND DISPLAY DEVICE HAVING THE SAME}

The present invention relates to a backlight assembly and a display device having the same, and more particularly, to a backlight assembly and a display device having the same for improving display quality.

In general, a liquid crystal display device is a display device that displays information by liquid crystal.

The liquid crystal display is one of the most widely used flat panel display devices, and includes a liquid crystal display panel including two substrates on which electrodes are formed and a liquid crystal layer injected therebetween. Accordingly, the liquid crystal display displays an image by controlling the amount of light transmitted by applying a voltage to the electrodes of the liquid crystal display panel to rearrange the liquid crystal molecules of the liquid crystal layer.

Since the liquid crystal display does not emit light by itself and displays an image by using an LCD panel, which is a light receiving element that controls the amount of light coming from the outside, the LCD panel requires a predetermined image to be formed. A separate light source, that is, a backlight assembly, for irradiating the furnace light is required.

The backlight assembly may include a reflection sheet, a diffusion plate, and an optical sheet, which are sequentially stacked in a storage container, and transmit light to an LCD panel, and a lamp assembly configured under the diffusion plate to generate the light.

Here, a gap (Gap) is formed between the diffusion plate and the optical sheet and the LCD panel due to assembly tolerances.

Therefore, the flow of the diffusion plate and the optical sheet occurs, the light is not properly provided to the LCD panel in accordance with the flow of the diffusion plate and the optical sheet, there is a problem that the display quality is deteriorated accordingly.

Accordingly, an object of the present invention is to provide a backlight assembly for bringing a light diffusing member into close contact with a display panel.

Another object of the present invention is to provide a display device having the above-described backlight assembly.

A plurality of lamps of the present invention for achieving the above object generates light, the light diffusing member is arranged on the lamps to uniform the luminance distribution of the light emitted to the display panel, the receiving member is a display panel, light diffusion The member and the plurality of lamps are sequentially received, the support member is integrally formed in the accommodation member, and the light diffusion member is supported to closely adhere the light diffusion member to the display panel.

A plurality of lamps for achieving another object of the present invention generates a first light, the light diffusing member is arranged on the lamps to uniform the luminance distribution of the first light to emit the second light, the display panel is 2 is provided with light to display an image, and the receiving member sequentially stores the display panel, the light diffusing member and the plurality of lamps, and the supporting member is integrally formed with the receiving member, and supports the light diffusing member to provide light to the display panel. Close the diffusion member.

According to the backlight assembly and the display device having the same, the light diffusing member is in close contact with the display panel so that the light diffusing member can be prevented from flowing, thereby improving display quality.

Hereinafter, a display device according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view illustrating a structure of a liquid crystal display according to an exemplary embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA ′ of FIG. 1.

1 and 2, a liquid crystal display according to an exemplary embodiment of the present invention is configured to provide light to the display unit 100 and the display unit 100 for displaying an image by applying an image signal. It consists of a backlight assembly 200.

The display unit 100 includes a liquid crystal display panel 110, a data printed circuit board 120, a gate printed circuit board 130, a data side TCP 140, and a gate side TCP 150.

Here, the liquid crystal display panel 110 implements a screen, and consists of a TFT substrate 112, a color filter substrate 114, and liquid crystal (not shown) injected between the two substrates.

The TFT substrate 112 is a transparent glass substrate on which a switching element TFT (not shown) is formed in a matrix form. A data line and a gate line are respectively connected to the source and gate terminals of the TFTs, and a pixel electrode made of indium tin oxide (hereinafter referred to as ITO), which is a transparent conductive material, is formed at the drain terminal. Meanwhile, the color filter substrate 114 is a substrate in which R, G, and B color pixels expressed in a predetermined color by light passing through are formed by a thin film process. In this case, a common electrode made of ITO is formed on the front surface of the color filter substrate 114.

The data line formed on the liquid crystal display panel 110 is electrically connected to the data printed circuit board 120 through the data side TCP 140, and the gate line connects the gate side TCP 150. It is electrically connected to the gate printed circuit board 130 through. Therefore, the data printed circuit board 120 and the gate printed circuit board 130 which receive the electric signal from the outside transmit the data driving signal and the gate driving signal to the display unit 110, respectively, the data side TCP 140 and the gate side. And transmit to the data line and the gate line through TCP 150, respectively.

Meanwhile, the backlight assembly 200 may include a lamp unit 210 generating a first light, a light diffusing member 220 for emitting a second light having a uniform luminance distribution by diffusing the first light, and a lamp unit ( The lamp reflector 230 reflecting the first light leaking from the light toward the light diffusing member 220 and the first accommodating member accommodating the lamp unit 210, the light diffusing member 220, and the lamp reflector 230. 240 (hereinafter referred to as bottom chassis).

Here, the lamp unit 210 includes a plurality of lamps 212 having a hot electrode (not shown) and a cold electrode (not shown) at one end thereof, and a plurality of lamps surrounding the hot and cold electrodes of the lamps 212. Lamp holder 214. In this case, the case in which eight straight lamps are formed is described as an example, but the number of the lamps may be variously applied.

The light diffusing member 220 is configured above the lamp unit 210 and diffuses the first light generated by the plurality of lamps 212 to display the second light whose luminance is uniformly adjusted. Exit At this time, the light diffusion member 220 is composed of a diffusion plate 222 and a plurality of optical sheets 224.

The bottom chassis 240 is formed of a bottom surface and sidewall surfaces extending from the bottom surface, the top surface is formed in an open box shape, and a storage space having a predetermined depth is formed therein. The lamp reflector 250 is installed in the accommodation space, and the lamps 212 are disposed on the lamp reflector 250. The bottom chassis 240 is formed of a metal material or a non-metal material.

In this case, a part of the first light generated from the lamps 212 is directly incident to the diffuser plate 222, and a part of the first light is reflected toward the diffuser plate 222 through the lamp reflector 230. In addition, the first light is diffused by the diffusion plate 222 and is emitted as the second light having a wide range of angles.

On the other hand, the side wall surface 242 of the bottom chassis 240 parallel to the longitudinal direction of the lamps 212 is inclined at a predetermined angle. A first step 244 on which the liquid crystal display panel 110 is seated and a second step 246 on which the light diffusion member 220 is seated are sequentially formed on an upper end of the sidewall surface 242.

In addition, the second step 242 is provided with a support member 250 for supporting the light diffusion member 220 to be in close contact with the liquid crystal display panel 110.

3 is a perspective view showing a detailed configuration of the support member shown in FIG.

As shown in FIG. 3, the support member 250 includes a first surface 252 in which a portion of the second step 246 extends in a direction perpendicular to the bottom surface of the bottom chassis 240 shown in FIG. 1. And a second surface 254 formed by extending an end portion of the first surface 252 in a direction perpendicular to the first surface 252 and in contact with the diffusion plate 222. That is, the support member 250 has a '-' shape. At this time, the support member 250 may be configured in various shapes such as a 'T' shape in addition to the 'b' shape.

The support member 250 is formed of the same material as the bottom chassis 240. That is, when the bottom chassis 240 is formed of a metal material, the support member 250 is also formed of a metal material. On the other hand, when the bottom chassis 240 is formed of a nonmetallic material such as PET or PMMA, the support member 250 is also formed of a nonmetallic material.

The support member 250 having the above-described configuration is formed in plural on the second step 246 of the bottom chassis 240 in which four sides of the diffusion plate 222 contact each other. For example, a plurality of supporting members 250 are formed at the second stepped portions 246 of the regions corresponding to the edges of the diffusion plate 222 or the center of the four sides.

In this case, the support member 250 has elasticity capable of uniformly pressing the diffusion plate 222 and the optical sheet 224 on the lower surface of the diffusion plate 222 to the extent that the diffusion plate 222 and the optical sheet 224 may be in close contact with the liquid crystal display panel 110. . In addition, the support member 250 has an elasticity capable of maintaining a state in which the optical sheet 224 and the diffusion plate 222 are pressed toward the liquid crystal display panel 110.

Therefore, the supporting member 250 having the above-described configuration uniformly adheres the diffusion plate 222 and the optical sheet 224 to the liquid crystal display panel 110. That is, the supporting member 250 is a plate spring principle, the diffusion plate 222 and the optical sheet 224 is the liquid crystal display as the second surface 254 presses the diffusion plate 222 toward the liquid crystal display panel 110 by the plate spring principle In close contact with the panel 110. Therefore, since there is no gap between the liquid crystal display panel 110 and the light diffusion member 220, that is, the diffusion plate 222 and the optical sheet 224, the diffusion plate 222 and the optical sheet 224 may flow. Is prevented.

Referring back to FIGS. 1 and 2, a second accommodating member 300 (hereinafter, referred to as a top chassis) having an upper and lower openings having an open angle is provided on the upper portion of the liquid crystal display panel 110. The top chassis 300 is coupled to the bottom chassis 240 to fix the liquid crystal display panel 110 to the bottom chassis 240.

Here, the top chassis 300 and the bottom chassis 240 may be coupled by a hook or a screw. This structure is a coupling structure used in the related art, and a detailed description of the coupling structure of the top chassis 300 and the bottom chassis 240 will be omitted.

4 is a view showing another example of the support member shown in FIG.

As shown in FIG. 4, the support member 260 has a coil shape in which a portion of the second step 246 shown in FIG. 2 extends toward the upper diffusion plate 222 and is spirally wound. Accordingly, since the coil-shaped support member 260 presses the diffusion plate 222 toward the liquid crystal display panel 110 by the property of restoring the original shape, the optical sheet 224 and the diffusion on the liquid crystal display panel 110. The plate 222 is in close contact.

Although the present invention has been described with reference to the plate-shaped support member and the coil-shaped support member as an example, the support member may be configured in various shapes formed of the same material as the bottom chassis.

As described above, the present invention includes a support member formed of the same material as the bottom chassis to support the light diffusing member.

Therefore, according to the present invention, since the light diffusion member is pressed toward the liquid crystal display panel by the support member, and the light diffusion member is in close contact with the liquid crystal display panel, the flow of the light diffusion member is prevented, thereby improving the display quality of the display device. .

While the invention has been described with reference to the examples, those skilled in the art may variously modify and change the invention without departing from the spirit and scope of the invention as set forth in the claims below. You will understand.

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

FIG. 2 is a cross-sectional view taken along line AA ′ of FIG. 1.

3 is a perspective view showing a detailed configuration of the support member shown in FIG.

4 is a view showing another example of the support member shown in FIG.

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

110: liquid crystal display panel 220: light diffusion member

212 diffuser plate 214 optical sheet

240: bottom chassis 250: support member

252: first page 254: second page

Claims (13)

In the backlight assembly for providing light to the display panel, A plurality of lamps for generating light; A light diffusion member disposed above the lamps and configured to uniformly distribute the brightness of the light to the display panel; An accommodation member accommodating the display panel, the light diffusion member, and the plurality of lamps sequentially; And And a support member integrally formed with the accommodating member and supporting the light diffusing member to closely contact the light diffusing member to the display panel. The light diffusing member of claim 1, wherein the receiving member is formed on an upper surface of a bottom surface, four sidewall surfaces extending from the bottom surface, and a sidewall surface parallel to a longitudinal direction of the lamps among the sidewall surfaces. A backlight assembly comprising a stepped seat. The method of claim 2, wherein the support member A first surface formed by protruding a portion of the step in a direction perpendicular to the bottom surface; And And a second surface extending in a direction perpendicular to the first surface and in contact with the light diffusing member. The backlight assembly of claim 3, wherein the support member has a '-' shape. The backlight assembly of claim 1, wherein the support member is formed of the same material as the housing member. The backlight assembly of claim 1, wherein the support member has elasticity. The backlight assembly of claim 1, wherein the light diffusion member comprises a diffusion plate and a plurality of optical sheets. The backlight assembly of claim 1, wherein the support member has a coil shape. A plurality of lamps for generating a first light; A light diffusion member disposed on the lamps to emit a second light by making the luminance distribution of the first light uniform; A display panel configured to receive the second light to display an image; An accommodation member accommodating the display panel, the light diffusion member, and the plurality of lamps sequentially; And And a support member integrally formed with the accommodating member and supporting the light diffusing member to closely adhere the light diffusing member to the display panel. The light diffusion member of claim 9, wherein the accommodating member is formed on an upper surface of a bottom surface, four sidewall surfaces extending from the bottom surface, and a sidewall surface parallel to a length direction of the lamps among the sidewall surfaces. A display device comprising a stepped seat. The method of claim 10, wherein the support member A first surface formed by protruding a portion of the step in a direction perpendicular to the bottom surface; And And a second surface extending in a direction perpendicular to the first surface and in contact with the light diffusing member. The display device of claim 9, wherein the support member is formed of the same material as the housing member. The display device of claim 9, wherein the support member has elasticity.