KR20080063968A - Liquid crystal display - Google Patents

Abstract

A liquid crystal display unit is provided to reduce a material cost and reduce a manufacturing time by forming a connector on a lower chassis and bending an upper chassis as a straight shape. A liquid crystal display unit includes a lower chassis(100), an upper chassis(700), a connector(100c), a liquid crystal display panel, and a backlight unit. The upper chassis is coupled to the lower chassis to form an accommodation space. One side wall of the upper chassis is opened. The connector is coupled to an opened region of the upper chassis. The connector forms a side wall of the upper chassis. The liquid crystal display panel and the back light unit are received in the accommodation space. The connector is extends from one side of the lower chassis and is bent.

Description

Liquid crystal display {LIQUID CRYSTAL DISPLAY}

1 is a schematic exploded perspective view of a liquid crystal display device according to the present invention;

FIG. 2 is a schematic cross sectional view taken on line A-A in FIG. 1; FIG.

3 is a schematic side view of an upper chassis and a lower chassis in accordance with the present invention;

Figure 4 is a schematic perspective view for explaining the coupling of the upper chassis and the lower chassis in accordance with the present invention.

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

100: lower chassis 100c: connection portion

102: lower fastening portion 300: lamp unit

400: light guide plate 500: optical sheet

700: upper chassis 702: upper fastening portion

2000: liquid crystal display panel

The present invention relates to a liquid crystal display, and more particularly, to a liquid crystal display including an upper chassis having one sidewall open and a lower chassis having one sidewall extended.

In general, the liquid crystal display (LCD) is expanding its application range due to features such as lightweight, thin, low-power drive, full-color, high-resolution implementation. Currently, liquid crystal displays are used in computers, notebooks, PDAs, telephones, TVs, and audio / video devices. Such a liquid crystal display displays a desired image on a liquid crystal display panel in which light transmittance is adjusted according to image signals applied to a plurality of control switches arranged in a matrix form.

The liquid crystal display includes a liquid crystal display panel for displaying an image and a backlight unit provided under the liquid crystal display panel to supply light to the liquid crystal display panel. In this case, an upper chassis is provided at an upper portion of the liquid crystal display panel and a lower chassis is provided at a lower portion of the backlight unit to protect and receive the liquid crystal display panel and the backlight unit.

In this case, in the liquid crystal display according to the related art, an opening (“ㅁ” shape) is formed in the upper chassis area corresponding to the area in which the image of the liquid crystal display panel is displayed. However, after the upper chassis is formed, the portion that blocks the opening is discarded, which leads to raw material loss.

In order to reduce such losses, a method of combining the upper chassis by using four straight chassis is also used, but this is inevitably fastened using screws, and since the fastening area is larger than before, the material cost can be reduced, but the manufacturing time increases and the overall There is a problem that the manufacturing cost is increased.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a liquid crystal display device having a chassis capable of minimizing raw material loss and reducing fastening time.

In order to achieve the above object, the present invention provides a lower chassis, an upper chassis coupled to the lower chassis to form a storage space, and one side wall of which is open, and a connection portion coupled to an open area of the upper chassis to form a side wall. And a liquid crystal display panel and a backlight unit accommodated in the accommodation space.

In this case, the connecting portion may be bent extending from one side of the lower chassis. However, the present invention is not limited thereto, and the connection part may be integrally formed on one sidewall of the lower chassis. Of course, the connection portion may be coupled to one side wall of the lower chassis.

The connection portion is preferably a cross-section perpendicular to the longitudinal direction of the connection portion "C" shape.

The upper chassis may include a first upper chassis part, a second upper chassis part bent to extend from the first upper chassis part, and a third upper chassis part bent from the second upper chassis part.

In this case, the first upper chassis portion and the third upper chassis portion may be bent from one side and the other side of the second upper chassis portion, and may be symmetrical with each other with the second upper chassis portion therebetween.

In addition, the upper chassis preferably has a cross-section perpendicular to the longitudinal direction of the liquid crystal display panel and the lower chassis to have a "c" shape.

In addition, the upper chassis and the lower chassis may be fastened by hook coupling or screw coupling.

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

However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you. Like reference numerals in the drawings refer to like elements.

1 is a schematic exploded perspective view of a liquid crystal display according to the present invention, FIG. 2 is a schematic cross-sectional view taken at the line AA of FIG. 1, FIG. 3 is a schematic side view of an upper chassis and a lower chassis according to the present invention, and FIG. 4 is Schematic perspective view for explaining the coupling of the upper and lower chassis according to the present invention.

1 and 2, the liquid crystal display according to the present invention includes a backlight unit 1000, a liquid crystal display panel 2000 that receives light from the backlight unit 1000 to display an image, and the backlight. And a chassis 800 for accommodating the unit 1000 and the liquid crystal display panel 2000.

The backlight unit 1000 is for supplying light to the liquid crystal display panel 2000. The backlight unit 1000 generates light, a light guide plate 400 provided on a side surface of the lamp unit 300, and It includes an optical sheet 500 provided on the upper and lower portions of the light guide plate 400. In this case, a driving unit (not shown) for driving the lamp unit 300 may be included.

The lamp unit 300 is a light source of the backlight unit 1000 according to the present exemplary embodiment, and may include a lamp 310 and a lamp cover 320 provided on the light incident surface of the light guide plate 400. In this embodiment, the light incident surface will be described with an example of the edge type backlight unit 1000 positioned on the side of the light guide plate 400, and the light emitted from the lamp unit 300 is the entrance of the light guide plate 400. The light incident on the light surface is emitted through the light guide plate 400. In FIG. 1, the light incident surface of the light guide plate 400 is illustrated as one side, but is not limited thereto. The light incident surface of the light guide plate 400 may be one side and the other side facing the light guide plate 400. Of course, the light incident surface of the light guide plate 400 may be a lower surface of the light guide plate 400.

The lamp 310 mainly uses a cold cathode fluorescent lamp, each of the lamps 310 are installed in the glass tube, the inert gas contained in the glass tube, the phosphor applied to the inner wall of the glass tube, both ends of the glass tube It consists of a negative electrode and a positive electrode.

The lamp cover 320 reflects the light that is not incident on the light incident surface of the light guide plate 400 among the light emitted from the lamp 310 to re-inject into the light guide plate 400, and surrounds the lamp 310. The light emitted from the lamp 310 may be formed in a 'c' shape so that the light emitted from the lamp 310 may be incident on the light incident surface of the light guide plate 400.

The light guide plate 400 is for converting the line light source emitted from the lamp unit 300 into a surface light source, and is made of a transparent material having a constant refractive index, such as polyolefin or polycarbonate, which is usually PMMA (Poly Methy Methacrylate), which is an acrylic resin. Are manufactured. The light guide plate 400 as described above may include at least one of a molded light guide plate 400, a light scattering light guide plate 400, and a hollow light guide plate 400.

The optical sheet 500 is to increase the output of light emitted through the light guide plate 400 in a direction perpendicular to the liquid crystal display panel 2000 and to improve the light quality of the liquid crystal display panel 2000. In this embodiment, the prism sheet 510, the diffusion sheet 520, and the reflective sheet 530 may be included.

The prism sheet 510 is for injecting the light emitted from the diffusion sheet 520 into the liquid crystal display panel 2000 by increasing the luminance by refracting and condensing the light. For this purpose, the upper surface of the light guide plate 400, that is, the light guide plate ( It is preferably located between the 400 and the liquid crystal display panel 2000. As the prism sheet 510, a strip-shaped micro-prism is formed on a base material such as polyester, and two horizontal and vertical sheets may be used as one set.

The diffusion sheet 520 is disposed on the upper surface of the light guide plate 400 to uniformly diffuse the light emitted from the light guide plate 400, and transmits the light toward the front of the prism sheet 510 and the liquid crystal display panel 2000 to widen the viewing angle. In order to reduce diffusion of bright spots, bright lines, unevenness, etc. of the 400, it is preferably located between the light guide plate 400 and the prism sheet 510. The diffusion sheet 520 may be manufactured using polycarbonate (PC) resin or polyester (PET) resin.

The reflective sheet 530 is for reflecting the light exiting to the lower surface of the light guide plate 400 again and incident the light into the light guide plate 400. For this purpose, the reflective sheet 530 is disposed on the lower surface of the light guide plate 400. Preferably located. The reflective sheet 530 has a high reflectance such as silver or titanium on a base material such as stainless steel, brass, aluminum, polyester, or the like. It can be produced by coating the material. However, the present invention is not limited thereto, and the reflective sheet 530 may be omitted by forming a material having excellent reflection efficiency on the bottom surface of the lower chassis 100. In addition, the reflective sheet 530 may be integrally formed with the lower chassis 100.

The liquid crystal display panel 2000 includes a thin film transistor substrate 600b, a data side and gate side tape carrier package (TCP) 610a and 620a connected to the thin film transistor substrate 600b, a data side, Data side and gate side printed circuit boards 610b and 620b connected to the gate side tape carrier packages 610a and 620a, the color filter substrate 600a corresponding to the thin film transistor substrate 600b, and the thin film transistor substrate ( And a liquid crystal layer (not shown) injected between the 600b and the color filter substrate 600a. The display device may further include a polarizer (not shown) formed to correspond to the upper portion of the color filter substrate 600a and the lower portion of the thin film transistor substrate 600b.

Here, the color filter substrate 600a is a substrate in which red (R), green (G), and blue (B) pixels, which are color pixels in which a predetermined color is expressed while light passes, are formed by a thin film process. A common electrode (not shown) made of a transparent conductor such as indium tin oxide (ITO) or indium zinc oxide (IZO), which is a transparent conductive thin film, is formed on the front surface of the color filter substrate 600a. have.

The thin film transistor substrate 600b is a transparent glass substrate in which thin film transistors (TFTs) and pixel electrodes are formed in a matrix form. The data line is connected to the source terminal of the thin film transistors, and the gate line is connected to the gate terminal. In addition, a pixel electrode (not shown) made of a transparent electrode made of a transparent conductive material is connected to the drain terminal. When an electrical signal is input to the data line and the gate line, each thin film transistor is turned on or turned off to apply an electrical signal necessary for pixel formation to a drain terminal.

The chassis accommodates and protects the liquid crystal display panel 2000 and the backlight unit 1000, and is disposed on the upper chassis 700 and the lower portion of the backlight unit 1000, which are in contact with the upper portion of the liquid crystal display panel 2000. It may include a lower chassis 100 in contact.

The upper chassis 700 is for accommodating and fixing the liquid crystal display panel 2000, the backlight unit 1000, and the lower chassis 100, and includes a first upper chassis 700a and a first upper chassis. It may be divided into a second upper chassis portion 700b extending from one end of the 700a and a third upper chassis portion 700c extending from one end of the second upper chassis 700b. In this case, the upper chassis 700 may bend the straight chassis having a cross section perpendicular to the longitudinal direction to "c" to form first to third upper chassis portions 700a to 700c.

The upper chassis 700 may include the first upper chassis 700a and the third upper chassis 700c such that the first upper chassis 700a and the third upper chassis 700c are symmetrical with respect to one end and the other end of the second upper chassis 700b. It is bent at one end and the other end. In addition, the upper chassis 700 is preferably manufactured in a "c" shape with one sidewall open to its entire shape based on a plan view. In addition, the cross section perpendicular to the longitudinal direction may also be manufactured in a shape of “c” so that the upper chassis 700 fixes the backlight unit 1000, the liquid crystal display panel 2000, and the lower chassis 100.

In addition, an upper fastening part 702 is formed in the first upper chassis part 700a and the third upper chassis part 700c to be coupled to the lower chassis 100, and the upper fastening part 702 is formed as a first fastening part 702. And second upper fastening portions 702a and 702b. In this embodiment, the upper fastening part 702 may include a through hole.

That is, in the upper chassis 700 according to the present embodiment, first and second upper fastening parts 702a and 702b, which are through holes, are formed at the ends of the first and third upper chassis parts 700c. The second upper fastening parts 702a and 702b are preferably shaped to be coupled to the hooks formed on the lower chassis 100.

The lower chassis 100 is for accommodating the backlight unit 1000, and includes a flat base plate 100a, a sidewall 100b vertically extending from an edge of the base plate 100a, and one sidewall of the sidewalls. The connection portion extends from (100c).

The connection part 100c is for fastening the lower chassis 100 to the upper chassis 700. The connector 100c extends from one sidewall of the lower chassis to be bent to extend and cover a portion of the upper portion of the liquid crystal display panel 2000. do. The connecting portion 100c has a cross section having a “a” shape, and the lower chassis 100 of the region where the connecting portion 100c is formed has the same vertical cross section as the upper chassis 700 in the longitudinal direction of the connecting portion 100c. It is preferable that it is a "c" shape.

That is, in the present embodiment, the chassis forms a connection portion 100c in the lower chassis 100 to fill the open sidewall of the upper chassis 700 with the lower chassis 100 so that the backlight unit 1000 and the liquid crystal display panel ( To cover one side of the 2000, and to one side and the other side of the lower connection portion 100c corresponding to the upper fastening portion 702 of the upper chassis 700 to fasten the lower chassis 100 to the upper chassis 700. The lower fastening part 102 is formed. In the present embodiment, the lower fastener 102 includes first and second lower fasteners 102a and 102b, and the first and second lower fasteners 102a and 102b are respectively the first upper fasteners. 702a, 702b. In addition, in the present embodiment, the lower fastening portion 102 uses a hook.

As shown in FIG. 3, the upper fastening part 702, which is a through hole formed in the upper chassis 700, is defined by the first upper fastening part length TD ₁ and the second upper fastening part length TD ₂ . The lower fastening part 102, which is a hook formed on the lower chassis 100, may define its width by the first lower fastening part length BT ₁ and the second lower fastening part length BT ₂ . .

The upper fastening part 702 and the lower fastening part 102 have the first upper fastening part length TD ₁ so that the lower fastening part 102 can be fastened to the upper fastening part 702. It is preferable that it is larger than or equal to the length BT ₁ , and the second upper fastening part length TD ₂ is also preferably larger than or equal to the second lower fastening part length BT ₂ . In addition, the width TL ₁ of the upper chassis 700 is preferably the same as the width BL ₁ of the lower chassis 100.

In this case, the hook protrudes outward from the lower fastening part 102 such that the lower fastening part 102 is fastened to the inner side of the upper fastening part 702. However, the present invention is not limited thereto, and the hook may protrude inward to allow the upper fastening part 702 to be fastened in the lower fastening part 102.

However, the present invention is not limited thereto, and the upper chassis 700 and the lower chassis 100 may be fastened by screwing. That is, the upper and lower fastening portions 102 may be formed with through holes, and the upper chassis 700 and the lower chassis 100 may be fastened by coupling screws corresponding to the through holes to the through holes.

As shown in FIG. 4, the liquid crystal display according to the exemplary embodiment having the above structure has an upper chassis 700 at the side of the lower chassis 100 for accommodating the backlight unit 1000 and the liquid crystal display panel 2000. ) Is fastened.

That is, the lower chassis 100 contacts the lower surface and the side surface of the backlight unit 1000 and a portion of the upper edge of the liquid crystal display panel 2000 to temporarily fix the backlight unit 1000 and the liquid crystal display, and the upper chassis ( The 700 is fitted at the side of the lower chassis 100 to be in contact with the other edge of the liquid crystal display panel 2000 and some edges of the lower portion of the lower chassis 100 and fastened to the lower chassis 100.

Meanwhile, in the present embodiment, the connection part 100c has been described as an example of being integrally formed on one side of the lower chassis 100, but the present invention is not limited thereto. The connection part 100c may be manufactured separately and thus one side of the lower chassis 100. It may also be attached to. In addition, the connection part 100c may be manufactured separately and combined with the first upper chassis part 700a and the third upper chassis part 700c of the upper chassis 700.

As described above, the liquid crystal display according to the present invention may reduce the material cost by bending the straight chassis to manufacture the upper chassis 700 having one sidewall open.

In addition, the liquid crystal display according to the related art has a connection portion 100c formed in the lower chassis 100 so as to fill one open sidewall of the upper chassis 700. Compared with the device, the upper chassis 700 and the lower chassis 100 are coupled by two fastening sites, thereby reducing the manufacturing process time.

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

As described above, the present invention can reduce the material cost and reduce the manufacturing process time by forming a connection to the lower chassis so that the upper chassis having one side wall is open to bend the straight chassis and fill the open one side wall of the upper chassis. It is possible to provide a liquid crystal display device.

Claims (10)

With the lower chassis, An upper chassis coupled to the lower chassis to form a storage space and having one side wall open; A connecting portion engaged with an open area of the upper chassis to form a side wall; And a liquid crystal display panel and a backlight unit accommodated in the storage space. The method according to claim 1, And the connection part extends and bent from one side of the lower chassis. The method according to claim 1, And the connection part is integrally formed on one sidewall of the lower chassis. The method according to claim 1, And the connection part is coupled to one sidewall of the lower chassis. The method according to any one of claims 1 to 4, And the connecting portion has a cross section perpendicular to a length direction of the connecting portion. The method according to claim 1, The upper chassis and the first upper chassis, A second upper chassis bent extending from the first upper chassis; And a third upper chassis bent from the second upper chassis. The method according to claim 6, The first upper chassis portion and the third upper chassis portion are bent extending from one side and the other side of the second upper chassis portion, And the second upper chassis are symmetrical with each other. The method according to claim 6 or 7, And the upper chassis surrounds edges of the liquid crystal display panel and the lower chassis. The method according to claim 8, And wherein the upper chassis has a cross-section perpendicular to the longitudinal direction of a "-C" shape. The method according to claim 5, The upper chassis and the lower chassis are fastened by hook coupling or screw coupling.

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