KR20050008278A - Liquid crystal display device - Google Patents

Abstract

PURPOSE: A liquid crystal display device is provided to reduce a whole outline size by reducing width of a bezel area by moving a lamp unit and an incidence surface of a light guide panel at a certain distance in an active area direction. CONSTITUTION: A liquid crystal display panel has a light blocking film(215) for dividing an active area(A) where an image is actually displayed. A light guide panel(320) has an incidence surface for containing light supplied from the lamp unit, and an exit surface for making the incidence light exit in a liquid crystal display panel direction, wherein the incidence surface is arranged to be corresponded to a position of the light blocking film. A first container(330) is formed of a bottom surface and side walls for receiving the lamp unit and the light guide panel. A second container(340) is combined with the side walls of the first container for fixing the lamp unit and the light guide panel. A top chassis(400) is combined with the side walls of the first container to fix the liquid crystal panel at the second container.

Description

Liquid crystal display {LIQUID CRYSTAL DISPLAY DEVICE}

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device for minimizing the overall outline size.

In general, a liquid crystal display (LCD) is one of flat display devices for displaying an image using a liquid crystal (LC). The liquid crystal display includes a display unit for displaying an image and a backlight assembly disposed on a rear surface of the display unit to supply light.

Recently, in order to secure the competitiveness of the product, a slimmer and lighter liquid crystal display device has been developed. In particular, the width of the liquid crystal display device to the outer line and the active area where the screen is actually displayed is reduced. Development is underway to reduce the overall outline size.

1 is a partial cross-sectional view for explaining a conventional liquid crystal display device.

Referring to FIG. 1, the conventional LCD 100 includes a display unit 110 for displaying an image, a backlight assembly 130 for supplying light to the display unit 130, and the display unit 130. Top chassis 150 for securing to backlight assembly 130.

The backlight assembly 130 includes a lamp unit 132 for generating light and a light guide plate 134 for changing a path of the light. The light guide plate 134 has an entrance surface for receiving the light generated from the lamp unit 132 and an exit surface for emitting the light incident through the entrance surface in the direction of the display unit 110.

The liquid crystal display device 100 includes an effective display area A defined by the light blocking film 112 formed in the display unit 110, a bezel area B defined by the top chassis 150, and It may be divided into the bezel opening area (C).

In this case, the size of the effective display area A and the bezel opening area C is fixed according to the size of the display unit 110. Therefore, depending on the size of the bezel area B, the overall outline size of the product is determined.

However, in the liquid crystal display 100 according to the related art, the incident surface of the light guide plate 134 is positioned at the position of the light blocking layer 112 of the display unit 110 in consideration of problems such as light leakage from the light incident part. Since it is arranged to extend further, there was a limit in reducing the bezel area B.

Accordingly, the present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a liquid crystal display device for reducing the overall outer size of a product by reducing the bezel width.

1 is a partial cross-sectional view for explaining a conventional liquid crystal display device.

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

3 is a cross-sectional view taken along the line D-D 'of FIG. 2.

4 is a cross-sectional view illustrating in detail the display unit illustrated in FIG. 3.

FIG. 5 is a perspective view illustrating in detail the second storage container illustrated in FIG. 2.

FIG. 6 is a cross-sectional view taken along the line FF ′ of FIG. 5.

7 is a view for explaining another embodiment of the lamp reflector shown in FIG. 2.

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

A: Effective display area B: Bezel area

C: bezel opening area 210: LCD panel

215: light blocking film 218: first polarizing film

310: lamp unit 313: lamp reflector

320: light guide plate 330: first storage container

340: second storage container

A liquid crystal display device for achieving the above object of the present invention includes a liquid crystal display panel for displaying an image, a lamp unit for supplying light, and a light guide plate for changing the path of the light.

The liquid crystal display panel has a light blocking film for distinguishing an effective display area in which an image is actually displayed.

The light guide plate has an entrance surface for receiving the light supplied from the lamp unit and an exit surface for emitting the light incident to the incident surface in the direction of the liquid crystal display panel, wherein the incident surface is the light of the liquid crystal display panel. It is arranged to correspond to the position of the blocking film.

The liquid crystal display may further include a first storage container having a bottom surface and sidewalls for accommodating the lamp unit and the light guide plate, and a sidewall of the first storage container for fixing the lamp unit and the light guide plate. And a top chassis coupled with a side wall of the first storage container to secure the liquid crystal display panel to the second storage container.

According to the liquid crystal display device, the light guide plate may be disposed such that the position of the incident surface corresponds to the position of the light blocking layer, thereby reducing the overall outline size.

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

2 is an exploded perspective view of a liquid crystal display according to an exemplary embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along line D-D 'of FIG. 2.

2 and 3, the liquid crystal display 2000 according to an exemplary embodiment of the present invention may include a display unit 200 for displaying an image and a backlight assembly for supplying light to the display unit 200. 300 and a top chassis 400 for fixing the display unit 200 to the backlight assembly 300.

The display unit 200 includes a liquid crystal display panel 210 for implementing a screen of the liquid crystal display device 2000, a gate printed circuit board 220 for driving the liquid crystal display panel 210, and a source printed circuit board. 230.

The source printed circuit board 230 is electrically connected to the liquid crystal display panel 210 by a data carrier tape carrier package 250 (TCP), and the gate printed circuit board 220 may be The gate side TCP 240 is electrically connected to the liquid crystal display panel 210.

The liquid crystal display panel 210 includes a TFT substrate 211 having a thin film transistor (hereinafter, referred to as TFT) and a pixel electrode (not shown), a color filter substrate 213 having RGB pixels, and a common electrode formed thereon. ) And a liquid crystal layer (not shown) positioned between the TFT substrate 211 and the color filter substrate 213.

A light blocking layer 215 is formed on the color filter substrate 213 to distinguish an effective display area in which the liquid crystal display panel 210 actually displays an image. The light blocking film 215 is formed in an edge shape surrounding an inclined surface of the color filter substrate 213 to display an image only inside the edge.

The backlight assembly 300 includes a lamp unit 310 for supplying light and a light guide plate 320 for guiding the light to the liquid crystal display panel 210. In addition, the lamp unit 310 includes at least one lamp 311 for generating the light and a lamp reflector 313 for reflecting the light to the light guide plate 320.

The lamp 311 is composed of a cold cathode fluorescent lamp (CCFL) having a rod shape, and the lamp reflector 313 is made of a material having a high reflectance, or a reflecting member is formed on a cover surface covering the lamp 311. By having a coated structure, the light is reflected toward the light guide plate 320 to improve the efficiency of the light.

The light guide plate 320 has an incident surface for receiving the light supplied from the lamp unit 310 and an emitting surface for emitting the light incident through the incident surface toward the liquid crystal display panel 210. In this case, the light guide plate 320 is disposed such that the position of the incident surface is within a range in which the light blocking film 215 is formed, and preferably, a region where the light blocking film 215 and the top chassis 400 overlap each other. It is arranged to correspond with (E).

The backlight assembly 300 includes a first accommodating container 330 having a bottom surface and sidewalls for accommodating the lamp unit 310 and the light guide plate 320, the lamp unit 310 and the light guide plate 320. The second storage container 340 is coupled to the side wall of the first storage container 330 to fix the.

In addition, the backlight assembly 300 may be mounted on the light guide plate 320 to improve the viewing angle and luminance uniformity of the light emitted from the light guide plate 320 and the light guide plate 320. A reflective plate 360 is further provided to reflect the light leaked from the light guide plate 320. In addition, the backlight assembly 300 may further include a bottom chassis 370 mounted to the first accommodating container 330 to accommodate the lamp unit 310 and the light guide plate 320.

Meanwhile, the liquid crystal display 2000 according to an exemplary embodiment of the present invention moves the incident surface of the light guide plate 320 in the direction of the effective display area A to minimize the bezel area B. do. In this case, since the second storage container 340 for fixing the optical sheet 350 and guiding the mounting of the display unit 200 extends inward from the incident surface of the light guide plate 320, In consideration of this, the position of the incident surface of the light guide plate 320 is determined within the range in which the second storage container 340 does not exceed the effective display area A. FIG. Therefore, in consideration of a certain design margin, the position of the incident surface of the light guide plate 320 may be disposed to be moved to the bezel opening area C. FIG.

4 is a cross-sectional view illustrating in detail the display unit illustrated in FIG. 3.

Referring to FIG. 4, the liquid crystal display panel 210 includes the TFT substrate 211, the color filter substrate 213, and the liquid crystal layer 217.

The liquid crystal display panel 210 is formed inside the color filter substrate 213 to separate the effective display area A, the light blocking film 215, the TFT substrate 211 and the color filter substrate ( It is formed between the 213 and the seal line (212) for sealing the liquid crystal layer (217).

In addition, the liquid crystal display panel 210 includes a first polarizing film 218 attached to an outer surface of the TFT substrate 211 and a second polarizing film 219 attached to an outer surface of the color filter substrate 213. It includes more.

The first polarizing film 218 and the second polarizing film 219 transmit only light that vibrates in a specific direction among the light supplied from the backlight assembly 300 so that the liquid crystal display panel 210 Display the image.

The liquid crystal display panel 210 having such a configuration is mounted on the second storage container 340.

FIG. 5 is a detailed perspective view illustrating the second storage container illustrated in FIG. 2, and FIG. 6 is a cross-sectional view taken along the line F-F ′ of FIG. 5.

5 and 6, the second storage container 340 has an upper surface extending to an edge portion of the light guide plate 320 to fix the lamp unit 310 and the light guide plate 320. 1 consists of a hook portion 342 for fastening with the storage container 330.

Steps for guiding the mounting of the liquid crystal display panel 210 are formed on an upper surface of the second storage container 340.

Specifically, when the liquid crystal display panel 210 is mounted on the upper surface of the second storage container 340, when the bezel area B is reduced as in the present embodiment, the second storage container 340 is reduced. An area where an upper surface of the first polarizing film 218 overlaps with each other is generated. In order to prevent the interference between the first polarizing film 218 and the second storage container 340, the first stepped surface on which the TFT substrate 211 is seated is disposed on an upper surface of the second storage container 340. 344 and a second step 346 extending from the first step 344 to which the first polarizing film 218 is seated.

In addition, a seat fixing protrusion 348 for preventing the flow of the optical sheet 350 may be further formed below the second step 346.

Meanwhile, the liquid crystal display 2000 according to the exemplary embodiment of the present invention moves the incident surface of the light guide plate 320 toward the effective display area A to reduce the bezel area B. There is a possibility that light leakage occurs in the light incident part.

In order to remove the light incident phenomenon, it is necessary to prevent the light supplied from the lamp unit 310 from leaking to the lower portion of the light guide plate 320.

7 is a view for explaining another embodiment of the lamp reflector shown in FIG. 2.

Referring to FIG. 7, the lamp reflector 700 reflects light generated from the lamp 311 toward the light guide plate 320 to improve light utilization efficiency. The lamp reflector 700 has a first surface 710 positioned above the lamp 311, a second surface 720 facing the incident surface of the light guide plate 320, and a lower portion of the lamp 311. Consisting of a third face 730 located.

Here, the third surface 730 extends so as to overlap a part of the light guide plate 320 through the incident surface of the light guide plate 320.

In addition, a protrusion 732 is formed on the third surface 730 at a position corresponding to the incident surface of the light guide plate 320 to prevent leakage of light. The protrusion 732 is formed by recessing a predetermined distance from the third surface 730 toward the lamp 311. The protrusion 732 may prevent the light emitted from the lamp 311 from leaking to the lower portion of the light guide plate 320 to remove the light incident portion.

According to such a liquid crystal display device, the width of the bezel area is reduced by moving the incident surfaces of the lamp unit and the light guide plate by a predetermined distance in the direction of the effective display area, thereby reducing the overall outer size of the product.

Although described with reference to the embodiments above, those skilled in the art or those skilled in the art without departing from the spirit and scope of the invention described in the claims to be described later It will be understood that various modifications and changes can be made.

Claims (9)

A liquid crystal display panel having a light blocking film for distinguishing an effective display area; A lamp unit for supplying light; An entrance surface for receiving the light supplied from the lamp unit and an exit surface for exiting the light incident on the incident surface toward the liquid crystal display panel, wherein the incident surface is disposed to correspond to the position of the light blocking layer; Light guide plate; A first accommodating container having a bottom surface and sidewalls for accommodating the lamp unit and the light guide plate; A second storage container coupled with a side wall of the first storage container to fix the lamp unit and the light guide plate; And And a top chassis coupled to a side wall of the first storage container to fix the liquid crystal display panel to the second storage container. The liquid crystal display of claim 1, wherein the top chassis comprises a side surface for coupling with the first storage container and an upper surface extending from the side surface to cover an upper portion of the liquid crystal display panel, wherein the upper surface partially overlaps the light blocking layer. Liquid crystal display device characterized in that. The liquid crystal display of claim 2, wherein the incident surface is disposed to correspond to an area where the light blocking film and the top chassis overlap. 3. The liquid crystal display device according to claim 2, wherein the position of the incident surface coincides with an end position of the upper surface of the top chassis. The liquid crystal display panel of claim 1, wherein the liquid crystal display panel An upper substrate; A lower substrate coupled to the upper substrate; A liquid crystal layer interposed between the upper substrate and the lower substrate; A first polarizing film attached to an outer side of the upper substrate; And It includes a second polarizing film attached to the outside of the lower substrate, And the light blocking layer is formed inside the upper substrate. 6. The display device of claim 5, wherein the second storage container includes a side portion for coupling with the first storage container, and an upper surface portion extending from the side portion to a partial region of the lamp unit and the light guide plate, wherein the lower substrate includes the lower substrate. And a second step on which the first step is seated and the second step on which the second polarizing film is seated. The lamp unit of claim 1, wherein the lamp unit includes a lamp for generating light and a lamp reflector surrounding three surfaces of the lamp to reflect light generated from the lamp toward an incident surface of the light guide plate. And a liquid crystal display device mounted on the surface thereof. 8. The lamp of claim 7, wherein the lamp reflector comprises a first surface positioned above the lamp, a second surface corresponding to the incident surface of the light guide plate, and a third surface positioned below the lamp. And a surface thereof extended to overlap a portion of the light guide plate. The liquid crystal display of claim 8, wherein the lamp reflector further includes a protrusion formed on the third surface and formed at a position corresponding to the incident surface of the light guide plate to prevent leakage of light.