KR20080024700A - Liquid crystal display - Google Patents

Abstract

A liquid crystal display is provided to make components to be commonly used and integrate the components by simplifying the structure of a liquid crystal display. A bottom chassis(150) includes a plurality of bottom chassis side walls(151-154) combined with a plate(140) and receives a plurality of lamps(133), a diffusion plate(132) and optical sheets(131). A middle chassis(160) includes middle chassis side walls(161-164) combined with the bottom chassis side walls and receives a liquid crystal panel(110) mounted thereon. A top chassis(170) is combined with a front surface of the liquid crystal panel such that the top chassis covers the plurality of middle chassis side walls and the bottom chassis side walls. Each bottom chassis side wall is combined with each side of the plate and includes a support in a step form and a slope face downwardly sloped from the support.

Description

Liquid crystal display

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

FIG. 2 is a cross-sectional view taken along lines II to II 'after the liquid crystal display of FIG. 1 is assembled.

3 is a cross-sectional view taken along line III-III ′ after the liquid crystal display of FIG. 1 is assembled.

4 is a perspective view of the bottom chassis of FIG. 1.

FIG. 5 is a cross-sectional view taken along a line II to II 'after assembling a part of the liquid crystal display of FIG. 1. FIG.

FIG. 6 is a cross-sectional view taken along line III-III ′ after assembling a part of the liquid crystal display of FIG. 1. FIG.

7 is a perspective view of the middle chassis of FIG. 1.

FIG. 8 is a cross-sectional view taken along a line II to II 'after assembling a part of the liquid crystal display of FIG. 1. FIG.

FIG. 9 is a cross-sectional view taken along line III-III ′ after assembling a part of the liquid crystal display of FIG. 1. FIG.

10 is a perspective view of the top chassis of FIG. 1.

(Explanation of symbols for the main parts of the drawing)

100: liquid crystal display device 140: plate

150: bottom chassis 160: middle chassis

170: top chassis 180: fixed part

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device which can reduce manufacturing costs with a simplified structure.

Liquid crystal display (LCD) is one of the most widely used flat panel display (FPD), and consists of two substrates on which electrodes are formed and a liquid crystal layer interposed therebetween. A display device adjusts the amount of light transmitted by rearranging liquid crystal molecules of a liquid crystal layer by applying a voltage to an electrode.

A liquid crystal display device requires a plurality of elements such as a liquid crystal panel, a diffusion plate, and a reflective sheet, and the plurality of elements are stored in a storage container such as a top chassis, a bottom chassis, and a mold frame to provide a liquid crystal display device. Can be configured. The storage containers may be manufactured by, for example, press / injection processing.

Recently, as the demand for liquid crystal displays has soared and mass production of liquid crystal displays is required, the liquid crystal display has been faced with demands for simplification, thinning, and cost reduction. However, the conventional press / injection machining has an aspect that is inadequate for the above-described needs because many molds are used.

Accordingly, it is necessary to apply a simple structure and improve the manufacturing cost.

It is an object of the present invention to provide a liquid crystal display device which can reduce manufacturing costs.

The technical problem of the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, a liquid crystal display device includes a plate and a plurality of bottom chassis sidewalls coupled to the plate, and a plurality of lamps, diffusion plates, and optical sheets are provided. A bottom chassis to be seated / received, a plurality of middle chassis sidewalls respectively coupled to a plurality of bottom chassis sidewalls, a middle chassis to which a liquid crystal panel is seated / received on an upper surface thereof, and a plurality of middles from the front of the liquid crystal panel A top chassis coupled surrounding the chassis side walls and the plurality of bottom chassis side walls.

Specific details of other embodiments are included in the detailed description and the drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

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

1 is an exploded perspective view of a liquid crystal display according to an exemplary embodiment of the present invention, and FIGS. 2 and 3 are cut along lines II to II 'and III to III', respectively, after the liquid crystal display of FIG. 1 is assembled. One cross section.

First, referring to FIG. 1, the liquid crystal display device 100 may include a liquid crystal panel assembly 120, a backlight assembly 131, 132, 133, and 134 and a storage container 150, 160, 170. have. The storage containers 140, 150, 160, and 170 may include, for example, a plate 140, a top chassis 170, a middle chassis 160, and a bottom chassis 150.

The liquid crystal panel assembly 120 includes a liquid crystal panel 110 and a liquid crystal panel including a first display panel 111, a second display panel 112, and a liquid crystal layer (not shown) interposed between the two display panels 111 and 112. First and second polarizers 113 and 114 attached to both sides of the 110, TPCs 116 and 117, which provide driving and control signals to the liquid crystal panel 110, and a printed circuit board 118. Can be.

Here, the first display panel 111 of the liquid crystal panel 110 includes a plurality of gate lines, data lines, switching elements, and pixel electrodes, and the second display panel 112 includes a black matrix, a color filter, a common electrode, and the like. can do. In this case, the first and second display panels 111 and 112 may be opposed to each other and may be bonded to each other, and a liquid crystal layer including a plurality of liquid crystal molecules having optical anisotropy may be interposed between the two display panels 111 and 112. In addition, the first and second polarizers 113 and 114 may be attached to both surfaces of the two display panels 111 and 112, for example, the lower surface of the first display panel 111 and the upper surface of the second display panel 112, respectively. have.

The liquid crystal panel 110 may be attached with TPCs 116 and 117 that provide driving and control signals. For example, the TPCs 116 and 117 may include, for example, the gate TPC 116 connected to the gate line of the first display panel 111 and the data TPC 117 connected to the data line of the first display panel 111. It may include. On the other hand, the printed circuit board 118 may be provided with a plurality of electronic components mounted on the gate TPC 116 and the data TPC 117 so as to be able to input a gate driving signal and a data driving signal, respectively.

The liquid crystal panel assembly 120 described above may be seated and accommodated in the middle chassis 160 to be described later.

The backlight assemblies 131, 132, 133, and 134 for supplying light to the liquid crystal panel 110 may be disposed below the liquid crystal panel 110. The backlight assembly 131, 132, 133, and 134 may include a plurality of lamps 133, a reflective sheet 134, a diffusion plate 132, and optical sheets 131.

The lamps 133 generate and emit light, and may be arranged in a plurality of phases connected in parallel at a uniform distance. In this case, the lamp 133 may be configured as a direct type, for example. In addition, the lamp 133 may be a light emitting diode (LED), a cold cathode fluorescent lamp (CCFL), an external electrofluorescent lamp (EEFL), or the like, but is not limited thereto.

1 and 2, the lamp 133 may be inserted into and fixed to the socket 137, for example, and the lamp 133 fixed to the socket 137 may be a bottom chassis 150 to be described later. The light may be exposed to the outside through the through holes 157 formed on the sidewalls of the light.

The lower portion of the lamp 133 may be a reflective sheet 134 reflecting the light emitted from the lamp 133 to the top. The reflective sheet 134 may be manufactured by dispersing a white pigment such as titanium oxide in a sheet made of synthetic resin, and bubbles for scattering light may be dispersed in the sheet made of synthetic resin. The reflective sheet 134 may be attached to a plate 140, and a predetermined adhesive may be positioned between the reflective sheet 134 and the plate 140.

The diffusion plate 132 is disposed above the lamp 133 to diffuse light emitted from the lamp 133 to improve uniformity of luminance. 1 to 3, the diffusion plate 132 may be formed in a flat plate shape and may be accommodated in the bottom chassis 150. In detail, the diffusion plate 132 may be mounted on the support end 155 of the stepped structure formed on the sidewall of the bottom chassis 150. In addition, the diffusion plate 132 may be supported by a support 135 attached to and / or coupled to the support 135, for example, the plate 140, in order to prevent sagging from occurring in the center portion.

Optical sheets 131 may be disposed on the diffuser plate 132. The optical sheets 131 serve to diffuse / converge the light transmitted from the lamp 133 and passed through the diffuser plate 132. The optical sheets 131 may include, for example, a diffusion sheet, a prism sheet, a protective sheet, or the like, and may be formed by stacking a plurality of sheets.

The bottom chassis 150 may receive the above-described backlight assembly 131, 132, 133, and 134. The bottom chassis 150 may be composed of at least four sidewalls coupled to the plate 140 to define an edge. Specifically, the bottom chassis 150 may be configured to include bottom chassis sidewalls coupled to respective sides of the plate 140 to define an edge, and the bottom chassis sidewalls and the plate 140 may be described above. The components of the backlight assembly 131, 132, 133, and 134 may be received.

Hereinafter, the bottom chassis described above will be described in detail with reference to FIGS. 4 to 6.

4 is a perspective view of the bottom chassis of FIG. 1, and FIGS. 5 and 6 are cross-sectional views cut along lines II to II 'and III to III', respectively, after assembling a part of the liquid crystal display of FIG. 1.

1 and 4 to 6, the bottom chassis 150 may include four sidewalls coupled to each side of the plate 140, for example, first to fourth sidewalls 151 and 152 for the bottom chassis. 153, 154. Here, inside the first to fourth sidewalls 151, 152, 153, and 154 for the bottom chassis, components of the backlight assembly 131, 132, 133, and 134, for example, a plurality of lamps 133 and reflections The sheet 134, the diffusion plate 132, and the optical sheets 131 may be stored.

Specifically, the first to fourth sidewalls 151, 152, 153, and 154 for the bottom chassis may be vertically coupled to each side of the plate 140, and each sidewall may include a diffusion plate 132 and optical sheets. A support end 155 having a predetermined width may be provided to allow the 131 to be seated / received. The first to fourth sidewalls 151, 152, 153, and 154 for the bottom chassis may include an outer surface, an upper surface, and an inner surface, and may have a hollow shape in which the inner surface is open. In detail, the first to fourth sidewalls 151, 152, 153, and 154 for the bottom chassis may include a stepped support end 155 and an inclined surface 156 inclined downward from the support end 155.

The outer surfaces of the first to fourth sidewalls 151, 152, 153, and 154 for the bottom chassis may be vertically formed at the outermost side, and may be positioned to be substantially aligned with the edges of the sides of the plate 140. A predetermined groove, for example, a screw coupling groove (not shown), may be formed in the outer surface to be coupled to the top chassis 170. Accordingly, the first to fourth sidewalls 151 and 152 for the bottom chassis may be formed. 153 and 154 may be screwed to the top chassis 170, respectively.

Upper surfaces of the first to fourth sidewalls 151, 152, 153, and 154 for the bottom chassis may be formed to be perpendicular to the outer surface along the upper edge of the outer surface. In addition, the upper surface may be provided with a predetermined coupling groove 158 formed extending in the longitudinal direction, for example, the longitudinal direction, of the first to fourth sidewalls 151, 152, 153, and 154 for the bottom chassis. The middle chassis 160, which will be described later, may be coupled to and fixed to 158.

The inner surfaces of the first to fourth sidewalls 151, 152, 153, and 154 for the bottom chassis may include a support end 155 and an inclined surface 156 stepwise formed from an upper surface. The support end 155 may be disposed below the upper surface to have a predetermined height difference from the upper surface, and may be provided in a rectangular band shape protruding inward to define a predetermined storage space. As described above, the diffusion end 132 and the optical sheets 131 may be seated / received in the support end 155.

The inclined surface 156 may extend from an edge of the support end 155 to be inclined downward from the support end 155. The inclined surface 156 may serve to reflect the light emitted from the lamp 133 so as not to leak downward. That is, the inclined surface 156 may be coated with a light reflecting resin, for example, white polycarbonate, to perform a reflection function, but is not limited thereto.

Further, among the inclined surfaces 156, a pair of inclined surfaces 156 facing each other, for example, first and fourth bottom chassis first and fourth sidewalls 151, 152, 153, and 154 are positioned to face each other. Through holes 157 may be formed in the inclined surfaces 156 of the side walls 151 and 153. The through groove 157 is a passage through which a plurality of lamps 133 penetrate and engage with the socket 137. Specifically, the plurality of through grooves 157 may be disposed at the lower end portions of the inclined surface 156 of the first side wall 151 for the bottom chassis and the third side wall 153 for the bottom chassis, and may face each other. The groove 157 may be formed at a constant separation distance. In this case, both ends of the lamp 133 may be inserted into and positioned in the opposing through grooves 157.

In addition, a bottom of the first to fourth sidewalls 151, 152, 153 and 154 for the bottom chassis may have a predetermined space, for example, a socket coupling groove 159, and the socket 137 may be a socket coupling groove ( 159) is not exposed to the outside. Therefore, the wrap 133 inserted into the socket 137 penetrates the through groove 157 and is coupled to the socket 137 so that a female part that may occur at both ends of the lamp 133 is blocked by the inclined surface 156. It is not admitted. The socket coupling groove 159 may be formed on a pair of sidewalls facing each other in which the through grooves 157 are formed, for example, the first and third sidewalls 151 and 153 for the bottom chassis. 150 may be formed on all sidewalls, that is, the first to fourth sidewalls 151, 152, 153, and 154 for the bottom chassis, respectively.

The first to fourth sidewalls 151, 152, 153, and 154 for the bottom chassis may be made of a metal material, for example, SUS material, and may be manufactured by extrusion, for example, screwed to the plate 140. Can be fixed. In addition, the present embodiment has been described with reference to the bottom chassis is divided into four sidewalls for example, the present invention is not limited to this, the bottom chassis may be divided into at least two parts assembled.

Referring back to FIGS. 1 to 3, the middle chassis 160 may be coupled to the first to fourth sidewalls 151, 152, 153, and 154 of the bottom chassis described above, respectively. The middle chassis 160 may include, for example, a plurality of middle chassis sidewalls, and the liquid crystal panel 110 may be seated and accommodated in the middle chassis sidewalls.

Hereinafter, the above-described middle chassis will be described in detail with reference to FIGS. 7 to 9.

FIG. 7 is a perspective view of the middle chassis of FIG. 1, and FIGS. 8 and 9 are cross-sectional views cut along lines II to II 'and III to III', respectively, after assembling a part of the liquid crystal display of FIG.

Referring to FIGS. 1 and 7 to 9, the middle chassis 160 may be configured to be coupled to the bottom chassis first to fourth sidewalls (reference numerals 151, 152, 153, and 154 of FIG. 4, respectively). The first to fourth sidewalls 161, 162, 163, and 164 may be provided. In addition, the liquid crystal panel 110 may be seated / received on one surface of the first to fourth sidewalls 161, 162, 163, and 164 for the middle chassis.

Specifically, the middle chassis 160 includes first to fourth sidewalls 161, 162, 163 and 164 for the middle chassis having a 'b' shape, and the first to fourth sidewalls 161 and 162 for the middle chassis. The liquid crystal panel 110 may be seated / received on one surface, that is, the upper surface of the first, second, second, third, third, fourth, third, third, fourth, third, fourth, fourth, fourth, fourth, fourth, fourth, fourth, third, ousmost, and other half thereofs 163 and 164 are disposed. In addition, the first to fourth sidewalls 161, 162, 163, and 164 for the middle chassis may include coupling grooves of the first to fourth sidewalls for bottom chassis (reference numerals 151, 152, 153, and 154 of FIG. 4). The back side may further include a predetermined coupling protrusion 165 formed in the longitudinal direction of the side wall, for example, in the vertical direction, so as to correspond to the reference numeral 158. The coupling protrusion 165 may correspond to the coupling grooves 158 of FIG. 4 formed in the first to fourth sidewalls 151, 152, 153, and 154 of the bottom chassis. Coupling protrusion 165 may be a sliding coupling with the coupling groove (reference numeral 158 of FIG. 4).

The first to fourth sidewalls 161, 162, 163, and 164 for the middle chassis described above are made of a metal material, for example, the first to fourth sidewalls for bottom chassis (reference numerals 151, 152, 153, and 154 of FIG. 4). For example, it may be made of SUS material and manufactured by extrusion, and may be fixed by, for example, screwing to the top chassis 170. In addition, the present embodiment has been described with reference to the middle chassis that is divided into four sidewalls for example, the present invention is not limited to this, the middle chassis may be divided into at least two parts assembled.

Referring back to FIGS. 1 to 3, fixing parts 180 for coupling / fixing the bottom chassis 150 and the middle chassis 160 may be located at the junctions of the bottom chassis 150. In detail, the fixing unit 180 is positioned at both ends of the junctions of the bottom chassis 150, that is, the first to fourth sidewalls of the bottom chassis (reference numerals 151, 152, 153, and 154 of FIG. 4). Middle chassis 160 coupled to and fixed to the bottom chassis first to fourth sidewalls (reference numerals 151, 152, 153, and 154 of FIG. 4) and secondly coupled to the bottom chassis 150, eg, For example, the first to fourth sidewalls (reference numerals 161, 162, 163, and 164 of FIG. 7) for the middle chassis are coupled to each other.

In addition, a predetermined groove (not shown) may be formed on the inner side of the fixing unit 180, and the first to fourth sidewalls for bottom chassis (not shown in FIGS. 4 to 151, 152, 153, and 154) are formed in the groove. And both ends of the first to fourth sidewalls (reference numerals 161, 162, 163, and 164 of FIG. 7) for the middle chassis may be inserted and fixed.

The fixing unit 180 may protect the components of the backlight assembly 131, 132, 133, and 134 that are received inside while completing the frame of the bottom chassis 150 and the middle chassis 160. Here, the fixing part 180 may be made of resin, for example, but is not limited thereto.

The top chassis 170 may be coupled to surround the middle chassis 160 and the bottom chassis 150 from the front surface of the liquid crystal panel 110. This top chassis 170 may have a plurality of top chassis sidewalls, for example, and the top chassis sidewalls may include first to fourth sidewalls for the middle chassis (reference numerals 161, 162, 163, and 164 of FIG. 7). ) And / or the outer side surfaces of the first to fourth sidewalls of the bottom chassis (reference numerals 151, 152, 153, and 154 of FIG. 4) may be used to complete the frame of the liquid crystal display.

Hereinafter, the top chassis described above will be described in detail with reference to FIG. 10. 10 is a perspective view of the top chassis of FIG. 1.

1 to 3 and 10, the top chassis 170 surrounds the outside of the middle chassis 160 and / or the bottom chassis 150 from the front surface of the liquid crystal panel 110 and is coupled to the top chassis. One to fourth sidewalls 171, 172, 173, and 174 may be provided. Specifically, the top chassis 170 may include first to fourth sidewalls 171, 172, 173, and 174 for the top chassis bent in a '-' shape, and the first to fourth sidewalls for the top chassis may be provided. Reference numerals 171, 172, 173, and 174 denote outer surfaces of the first to fourth sidewalls for the middle chassis (reference numerals 161, 162, 163, and 164 of FIG. 7) and / or the first to fourth sidewalls for the bottom chassis (FIG. Coupling with the outer surface of the reference numerals 151, 152, 153, 154 of 4, the liquid crystal panel 110 and the backlight assembly (131, 132, 133, 134) can be accommodated therein.

Here, the first to fourth sidewalls 171, 172, 173, and 174 for the top chassis are made of a metal material, for example, an SUS material, similarly to the middle chassis 160 and the bottom chassis 150, which are manufactured by extrusion. First to fourth sidewalls for the middle chassis (reference numerals 161, 162, 163 and 164 of FIG. 7) and / or first to fourth sidewalls for the bottom chassis (reference numerals 151, 152 and 153 of FIG. 4). 154, for example, can be fixed by screwing. In addition, in the present embodiment, for example, a top chassis divided into four sidewalls is described as an example, but the present invention is not limited thereto, and the top chassis may be manufactured in a single body or in a structure that is divided into two parts. .

Thus, the liquid crystal display according to the exemplary embodiment of the present invention has been described. The above-described liquid crystal display device can simplify the structure of the liquid crystal display device by separately fabricating a storage container, for example, a top chassis, a middle chassis, and a bottom chassis by sidewall units, and then assembling them. It can be manufactured easily, which can reduce expensive mold cost.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

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

First, by manufacturing the bottom chassis, the middle chassis, and the top chassis by extrusion processing, it is possible to reduce expensive mold costs, thereby reducing the manufacturing cost of the liquid crystal display device.

Second, there is an advantage in that the component common use and integration can be achieved by simplifying the structure of the liquid crystal display.

Claims (12)

Plates; A bottom chassis having a plurality of bottom chassis sidewalls coupled to the plate, the bottom chassis having a plurality of lamps, diffusion plates, and optical sheets seated / received therein; A middle chassis having a plurality of middle chassis sidewalls respectively coupled to the plurality of bottom chassis sidewalls, and having a liquid crystal panel seated / received on an upper surface thereof; And And a top chassis coupled to surround the plurality of middle chassis sidewalls and the plurality of bottom chassis sidewalls from a front surface of the liquid crystal panel. According to claim 1, And each of the bottom chassis sidewalls is coupled to each side of the plate and includes a stepped support end and an inclined surface inclined downward from the support end. The method of claim 2, The liquid crystal display device in which the diffusion plate and the optical sheet is mounted / received at the support end. The method of claim 2, The pair of side walls facing each other among the plurality of bottom chassis side walls further includes a plurality of through grooves formed to face each other at a lower end of the inclined surface, And a plurality of lamps inserted into the through grooves. According to claim 1, Coupling grooves are formed in the longitudinal direction on upper surfaces of the plurality of bottom chassis side walls, respectively. The plurality of middle chassis sidewalls may include coupling protrusions respectively coupled to the coupling grooves. The method of claim 5, The liquid crystal display device of which the coupling groove and the coupling protrusion are slidingly coupled. The method of claim 5, The liquid crystal display may further include fixing parts disposed at junctions of the plurality of bottom chassis sidewalls, respectively, and fixing ends of the plurality of bottom chassis sidewalls and / or both ends of the plurality of middle chassis sidewalls. . According to claim 1, The plurality of bottom chassis sidewalls are screw-coupled with the plate. According to claim 1, And the top chassis includes a plurality of top chassis sidewalls and / or a plurality of top chassis sidewalls coupled to the plurality of middle chassis sidewalls. The method of claim 9, And the plurality of top chassis sidewalls are screw-coupled with the plurality of bottom chassis sidewalls and / or the plurality of middle chassis sidewalls. According to claim 1, And the bottom chassis, the middle chassis and the top chassis are formed by extrusion processing. According to claim 1, The bottom chassis, the middle chassis and the top chassis are made of SUS.

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