KR101289068B1 - Liquide crystal display device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, A main support housing the backlight assembly; A liquid crystal panel disposed on the main support and including an upper substrate and a lower substrate; And a lower cover which surrounds the main support, the backlight assembly, and the liquid crystal panel, and has a panel guide part.

Description

[0001] LIQUIDE CRYSTAL DISPLAY DEVICE [0002]

1 is a perspective view showing a general liquid crystal display device.

Fig. 2 is a cross-sectional view taken along the line II-II in Fig. 1, showing an enlarged cross-sectional view of a panel guide portion provided in a main support. Fig.

3 is a perspective view illustrating a liquid crystal display device according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 3, showing an enlarged cross-sectional view of a panel guide formed on the lower cover;

DESCRIPTION OF THE REFERENCE SYMBOLS

205: liquid crystal panel (213: upper substrate, 214: lower substrate)

202: Main support

202a: Top surface of the main support

202b:

206: bottom cover

206a:

201: Backlight assembly

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of minimizing the size of a liquid crystal display device by changing the shape of a lower cover and a main support.

Generally, the liquid crystal display device has a tendency of widening its application range due to features such as light weight, thinness, and low power consumption driving.

Accordingly, the liquid crystal display device is widely used as a portable computer such as a notebook PC, an office automation device, an audio / video device, and an indoor / outdoor advertisement display device.

A liquid crystal display device displays a desired image on a screen by adjusting a light transmission amount according to an image signal applied to a plurality of switching elements for control arranged in a matrix form. Such a liquid crystal display device is rapidly evolving into a large-sized and high-resolution image due to recent achievements of mass production technology and research and development.

2. Description of the Related Art Liquid crystal displays (LCDs) generally include a liquid crystal panel including a color filter substrate as an upper substrate, a thin film transistor array substrate as a lower substrate, and a liquid crystal layer filled between the substrates, And a driving unit for supplying a scanning signal to the liquid crystal panel and supplying image information to perform an operation of the liquid crystal panel.

Here, the liquid crystal panel may include gate lines arranged to be spaced apart from one another by a predetermined distance, data lines spaced apart from one another by a predetermined distance and intersecting with each other, pixels in the region where gate lines and data lines cross each other, .

The pixels are individually provided with switching elements, and are electrically connected to the gate lines and the data lines.

The thin film transistor array substrate and the color filter substrate are provided with a pixel electrode and a common electrode, and the liquid crystal is driven by a voltage difference between the pixel electrode and the common electrode to display an image.

Since the liquid crystal panel itself can not emit light, the liquid crystal display device requires a light source such as a lamp in order to visually recognize the display contents.

Therefore, a backlight assembly is provided as a light source on the rear surface of the liquid crystal display device.

Such a liquid crystal panel and a backlight assembly must be integrally formed to prevent light loss, and must be protected so as not to be damaged by an external impact.

To this end, a case is provided which is configured to surround the backlight assembly including the edge of the liquid crystal panel.

A liquid crystal display device including such a case will be described in detail with reference to FIGS. 1 and 2. FIG.

FIG. 1 is a perspective view of a general liquid crystal display device, showing a state in which a lower cover is fastened to a main support in which a backlight assembly and a liquid crystal panel are housed.

Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1, and is an enlarged sectional view showing a panel guide portion provided in a main support. Fig.

1 and 2, a typical liquid crystal display device includes a backlight assembly 101; A main support 102 in which the backlight assembly 101 is housed; A liquid crystal panel 105 disposed on the main support 102; A backlight assembly 101 accommodated in the main support 102 and the main support 102 and a lower cover 106 for covering and protecting the liquid crystal panel 105. Polarizing plates 115 and 116 are attached to the upper part of the liquid crystal panel 105, respectively.

In addition, a double-sided tape 103 attached between the liquid crystal panel 105 and the main support 102 and a pad 104 provided on the double-sided tape 103 are provided.

As shown in FIG. 2, the backlight assembly 101 includes a lamp (not shown); A lamp housing (not shown) which surrounds the lamp (not shown) and has an opening (not shown) inside; A light guide plate 107 that is coupled to the opening and converts light incident from a lamp (not shown) into a surface light source and guides the light to the liquid crystal panel 105 side; A reflective sheet 108 positioned below the light guide plate 107; And a plurality of optical sheets 109 for improving the efficiency of light emitted from the light guide plate 107 and irradiating the light to the liquid crystal panel 105.

The optical sheets 109 include a diffusion sheet 110, a prism sheet 111, and a protective sheet 112.

The light emitted from the lamp (not shown) travels toward the liquid crystal panel 105 by the reflective sheet 108 and the light guide plate 107 and passes through the optical sheets 109 as light having a uniform brightness And is incident on the liquid crystal panel 105.

So that the liquid crystal panel 105 displays an image of high luminance to the outside.

The main support 102 is made of metal or synthetic resin and has a plurality of panel guide portions 102a along the inner side surface of the main support 102. [ The plurality of panel guide parts 102a protrude toward the liquid crystal panel to guide the side surface of the liquid crystal panel.

The portion of the main support 102 where the panel guide 102a is formed has a thickness of W1 as shown in FIG. 2, which preferably has a length of 1.1 mm or more.

The portion of the main support 102 where the panel guide 102a is not formed has a thickness of W2 as shown in Fig. 2, and it is preferable that the main guide 102 has a length of 0.6 mm or more.

As shown in FIG. 2, the main support 102 has at least one latching jaw. One of the latching jaws is an optical sheet 109 as a first latching jaw 102b. And the liquid crystal panel 105 is stacked as the second latching jaw 102c.

The liquid crystal panel 105 includes an upper substrate 113 and a lower substrate 114. An upper polarizer 115 is formed on an upper surface of the upper substrate 113 and a lower polarizer 116 is formed on a lower surface of the lower substrate 114. [ .

In the case of the liquid crystal display device having the above-described configuration, as the tendency of weight reduction and thinning becomes stronger, expectations for development of a lighter, thinner and smaller model are increasing.

Lightweight and thinned models are demanded in small models such as mobile phones, digital cameras, and personal digital assistants (PDAs).

Recently, a method of reducing the thickness (W1, W2) of the main support having the panel guide portion to reduce the outer size of the liquid crystal display device has been proposed. However, since the applicable minimum thicknesses W1, W2 are limited, There was a limit to minimization.

In particular, since the panel guide structure formed in the conventional main support guides the panel by applying the rib shape, it is more difficult to reduce the thickness of the main support in order to reduce the outer size of the liquid crystal display device.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a liquid crystal display device in which the outer size of a liquid crystal display device is minimized by changing the shape of a lower cover and a main support.

According to an aspect of the present invention, there is provided a liquid crystal display comprising: a backlight assembly; A main support housing the backlight assembly; A liquid crystal panel disposed on the main support and including an upper substrate and a lower substrate; And a lower cover which surrounds the main support, the backlight assembly, and the liquid crystal panel, and has a panel guide part.

Hereinafter, preferred embodiments according to the present invention will be described in detail.

FIG. 3 is a perspective view illustrating a liquid crystal display device according to an embodiment of the present invention, in which a main support and a liquid crystal panel in which a backlight assembly is housed are stacked in a lower cover.

Fig. 4 is a cross-sectional view of the panel taken along line IV-IV in Fig. 3, showing a liquid crystal display including a lower cover having a panel guide portion.

3 and 4, the liquid crystal display according to the embodiment of the present invention includes a backlight assembly 201; A main support 202 in which the backlight assembly 201 is housed; A liquid crystal panel 205 disposed on the main support 202 and including an upper substrate 213 and a lower substrate 214; And a lower cover 206 surrounding the main support 202, the backlight assembly 201 and the liquid crystal panel 205 and having a panel guide part 206a.

A double-sided tape 203 and a pad 204 are provided between the liquid crystal panel 205 and the main support 202. An upper polarizer 215 and a lower polarizer 216 are attached to upper and lower portions of the liquid crystal panel 205, respectively.

The backlight assembly includes a lamp (not shown); A lamp housing (not shown) which surrounds the lamp (not shown) and has an opening toward the inside thereof; A light guide plate 207 coupled to the opening and guiding light incident from a lamp (not shown) to a surface light source and guiding the light to the liquid crystal panel 205 side; A reflective sheet 208 positioned below the light guide plate 207; And a plurality of optical sheets 209 for improving efficiency of light emitted from the light guide plate 207 and irradiating the liquid crystal panel 205 with the light.

The optical sheet 209 includes a diffusion sheet 210, a prism sheet 211, and a protective sheet 212.

The light emitted from the lamp (not shown) travels toward the liquid crystal panel 205 by the reflective sheet 208 and the light guide plate 207, and passes through the optical sheets 209 as light having a uniform brightness And is incident on the liquid crystal panel 205. Thus, the liquid crystal panel 205 can display an image of high luminance externally.

The main support 202 is made of metal or synthetic resin. The backlight assembly 201 is housed in the main support 202 and the liquid crystal panel 205 is stacked on the top. A locking step 202b is formed in the main support 202 and the optical sheets 209 are stacked on the locking step 202b.

A liquid crystal panel 205 is stacked on the upper surface 202a of the main support 202. [

The optical sheets 209 include a diffusion sheet 210, a prism sheet 211, and a protective sheet 212.

The pad 204 and the liquid crystal panel are positioned on the upper side of the double-sided tape 203 and the lower side of the double-sided tape 203 is provided with a latching jaw 202b of the main support 202, Optical sheets 209 are located.

The pad 204 is formed of a soft material and is attached to an upper portion of the double-sided tape 203, and a liquid crystal panel 205 is disposed on the pad 204.

The liquid crystal panel 205 includes an upper substrate 213 and a lower substrate 214. An upper polarizer 215 is disposed on an upper surface of the upper substrate 213 and a lower polarizer 216 is disposed on a lower surface of the lower substrate 214. [ .

The lower cover 206 is made of press material made of a metal material and is formed so as to surround the side surface and back surface of the main support 202 accommodated in the backlight assembly 201 and the side surface of the liquid crystal panel 205.

As shown in FIG. 3, the lower cover 206 has a plurality of panel guide portions 206a formed at regular intervals.

 The panel guide part 206a has a convexly protruding shape curved in the inner direction of the lower cover 206, that is, the side surface of the liquid crystal panel 205, and is formed to guide the side surface of the liquid crystal panel 205 . Guideing the side surface of the liquid crystal panel 205 means fixing the side surface of the liquid crystal panel 205 in order to prevent the liquid crystal panel 205 from flowing due to an external impact or the like.

The panel guide part 206a may be formed at the same height as the side surface of the upper substrate 213 of the liquid crystal panel 205. [ This prevents the common electrode and the pixel electrode from being broken due to the contact of the panel guide 206a with the common electrode formed between the upper substrate 213 and the lower substrate 214 of the liquid crystal panel 205 and the pixel electrode, . That is, it is for protecting the common electrode and the pixel electrode against an external impact.

The shape of the panel guide portion 206a can be sufficiently modified and applied within a range not deviating from the gist of the present invention.

As described above, the liquid crystal display according to the present invention has the following effects.

According to the present invention, by forming the panel guide portion by deforming the shape of the lower cover, the panel guide portion formed in the conventional main support can be removed, and the size of the main support can be minimized. That is, not only the height of the main support but also the width of the main support is greatly reduced, so that not only the size of the liquid crystal display but also the weight can be minimized.

Therefore, it is possible to meet the expectation for development of a thinner and smaller model in accordance with the recent trend of weight reduction and thinning in a liquid crystal display device. Especially, it is more effective when applied to small models such as mobile phones, digital cameras, and personal digital assistants (PDA), which are expected to be lighter and thinner.

Claims (9)

A liquid crystal panel; A backlight assembly disposed on a rear surface of the liquid crystal panel to provide light; A support main body in which the liquid crystal panel is disposed on an upper portion, and which surrounds the backlight assembly; A pad of soft material on which the liquid crystal panel is disposed; A double-sided tape disposed between the pad and the support main; And A lower cover which surrounds the side surfaces of the liquid crystal panel and the support main body and has at least one panel guide portion protruding at a predetermined interval toward the lateral direction of the liquid crystal panel and guiding the side surface of the upper substrate of the liquid crystal panel, And the liquid crystal display device. delete delete delete delete delete The liquid crystal display of claim 1, wherein the panel guide part is formed integrally with the lower cover. delete The method according to claim 1, The support main body includes: And the optical sheets of the backlight assembly are stacked.

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