KR20070065110A - Liquid crystal display - Google Patents

Abstract

An LCD(Liquid Crystal Display) is provided to facilitate coupling between a lower receiving container and a protective case by forming a protrusion at the lower receiving container and forming a coupling guide portion coupled to the protrusion at the protective case. A lower receiving container(300) receives a liquid crystal panel(100), and includes a protrusion at a back surface. A printed circuit board(120) is connected to the liquid crystal panel, supplies a driving and control signal to the liquid crystal panel, is bent along a sidewall of the lower receiving container, and is placed at a back surface of the lower receiving container. A protective case(400) is coupled to the lower receiving container to cover the printed circuit board, and includes a coupling guide portion correspondingly coupled to the protrusions at a sidewall thereof. The coupling guide portion includes a first coupling guide part formed at one sidewall of the protective case, and a second coupling guide part formed at the other sidewall facing the one sidewall. The first and second coupling guide parts are formed integrally with the protective case.

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 rear perspective view of FIG. 1.

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

4 is a rear perspective view of FIG. 3.

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

100: liquid crystal panel 111: first display panel

112: second display panel 120: printed circuit board

130: tape carrier package 200: backlight assembly

210: optical sheets 220: light source unit

230: Light guide plate 240: Reflective sheet

250: mold frame 300: lower storage container

350a: first projection 350b: second projection

400: protective case 400a: first coupling guide portion

400b: second coupling guide portions 123 and 460: coupling holes

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device for easily coupling the lower housing and the protective case.

As the information society develops, the demand for display devices is changing in various forms, and in recent years, liquid crystal displays, organic luminescent displays, and plasma display panels have been developed. Various flat panel displays have been developed and used in various fields.

Among the flat panel display devices which are most widely used, a liquid crystal display device having excellent image quality, light weight, and low power consumption may be used.

The liquid crystal display device includes a liquid crystal panel including two display panels on which electrodes are formed and a liquid crystal layer interposed therebetween, and applies a voltage to the electrodes to control the amount of light transmitted by rearranging the liquid crystal molecules of the liquid crystal layer. It is a display device. Since the liquid crystal display is a non-light emitting device, it cannot be used where there is no light. In order to compensate for these disadvantages and to enable use even in the dark, a backlight assembly for irradiating uniform light to the liquid crystal panel is mounted.

Also, a printed circuit board is provided outside the liquid crystal panel to generate various control signals, data signals, and the like for controlling the image displayed on the liquid crystal panel by electrical signals. The printed circuit board is electrically connected to the liquid crystal panel by, for example, a tape carrier package.

In this case, the printed circuit board is bent to the bottom of the lower housing to be combined with the lower housing to reduce the area of the liquid crystal display. At this time, the printed circuit board is covered and protected by a protective case.

Such a protective case is made of a metal material, and is coupled through a lower housing and a screw.

However, when assembling the lower storage container and the protective case there is no coupling guide portion, there is a problem that not only fastening performance but also increase the working time.

An object of the present invention is to provide a liquid crystal display device in which the lower housing and the protective case can be easily coupled.

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, there is provided a liquid crystal display, a liquid crystal panel, a lower storage container accommodating a liquid crystal panel and having protrusions formed on a rear surface thereof, and connected to the liquid crystal panel to drive and control the liquid crystal panel. A signal is supplied and is bent along the side wall of the lower housing container and is coupled to the lower housing container to cover the printed circuit board and the printed circuit board positioned on the rear side of the lower housing container, and a coupling guide portion is formed on the side wall to correspond to the protrusions. Include a protective case.

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, and FIG. 2 is a rear perspective view of FIG. 1.

Referring to FIG. 1, the liquid crystal display device 600 includes a liquid crystal panel 100, a backlight assembly 200, a mold frame 250, a lower storage container 300, an upper storage container 500, and a protective case 400. ).

The liquid crystal panel 110 serves to display an image, and a liquid crystal layer (not shown) formed between the first display panel 111, the second display panel 112, and the first display panel 111 and the second display panel 112. It includes.

The first display panel 111 includes a plurality of gate lines having a predetermined interval and extending in a first direction, and a plurality of data lines, gate lines, and data lines extending in a second direction so as to intersect the gate line and arranged at regular intervals. A thin film transistor is formed in the pixel area defined by the pixel switch to switch the signal of the pixel electrode and the gate line in a matrix to transfer the signal of the data line to each pixel electrode.

The second display panel 112 includes a light blocking pattern for blocking light in portions other than the pixel area, an RGB color filter pattern for expressing color colors, and a common electrode for implementing an image.

The first display panel 111 and the second display panel 112 are bonded to each other by a sealant, frit glass, or the like in a state where a constant interval is maintained by a spacer. A liquid crystal layer having optical anisotropy is formed between the first and second display panels 111 and 112.

A printed circuit board 120 is electrically connected to one side of the liquid crystal panel 100 by a tape carrier package (TCP) 130. On the printed circuit board 120, a plurality of electronic components 125 generating driving and control signals of the liquid crystal panel 100 are mounted in a surface mount technology method. In addition, the tape carrier package 130 includes a driving IC for driving the liquid crystal panel 110 in the center portion. The printed circuit board 120 and the tape carrier package 130 apply a driving signal and a timing signal to the gate line and the data line of the first display panel 111 to control the arrangement angle of the liquid crystal and the timing of the liquid crystal.

The backlight assembly 200 that provides light to the liquid crystal panel 110 is positioned below the liquid crystal panel 110. The backlight assembly 200 includes a light source unit 220, a light guide plate 230, a reflective sheet 240, and optical sheets 210.

The light source unit 220 is disposed on at least one side of the light guide plate 230 and includes a light source 211 and a light source cover 212 covering the light source 211. As the light source 211, a line light source such as a Cold Cathode Fluorescent Lamp (CCFL) or a Hot Fluorescent Lamp (HCFL) may be used, and a point light source such as a light emitting diode (LED) may be used. Can also be used. In this embodiment, an example using a cold cathode light source will be described.

On the other hand, the light source unit 220 may be disposed on the long side or short side of the rectangular light guide plate 230, two may be disposed on the neighboring side or the opposite side. In FIG. 1, as an example, two light source units 220 are disposed at opposite long sides of the light guide plate.

The light guide plate 230 has a rectangular shape and guides the light emitted from the light source unit 220 toward the upper side of the backlight assembly 200, that is, the liquid crystal panel 110. The light guide plate 230 is made of a material having good refractive index and transmittance, for example, polymethyl methacrylate (PMMA), polycarbonate (PC), polyethylene (PE), or the like.

In addition, a scattering pattern for scattering light is formed on the bottom of the light guide plate 230 to guide light incident from the side surface of the light guide plate 230 to an upper side. The scattering pattern may be formed by applying a scattering material to the bottom surface of the light guide plate 230 and patterning the scattering material, and by applying a predetermined curvature to the bottom surface of the light guide plate 230.

The reflective sheet 240 is disposed under the light guide plate 230. The reflective sheet 240 reflects the light emitted from the lower portion of the light guide plate 230 through the bottom of the light guide plate 230 to the upper side of the light guide plate 230 to increase the luminance of the backlight assembly, and the upper side of the light guide plate 230. The light is emitted evenly.

As the reflective sheet 240, a material having good elasticity, excellent light reflection, and thinness may be used. For example, polyethylene terephthalate (PET) having a thickness of 0.01 mm to 5 mm may be used, but is not limited thereto. In addition, if necessary, a thin film having good elasticity may be used by coating a reflective film to increase light reflection.

The optical sheets 210 are disposed on the light guide plate 230. The optical sheets 210 allow the light guided by the light guide plate 230 to be uniformly irradiated onto the upper side of the backlight assembly 200, for example, one or more diffusion sheets 210c and prism sheets 210a and 210b. Or optical sheets, such as a protective sheet, are selectively laminated | stacked. At this time, only one optical sheet may be disposed, and a plurality of identical optical sheets may be disposed. In addition, the stacking order of the optical sheet may be variously modified in a range of increasing the uniformity of light.

The optical sheets 210 may be formed of a transparent resin such as an acrylic resin, a polyurethane resin, or a silicone resin.

The mold frame 250 has a predetermined storage space therein to accommodate the backlight assembly 200 as described above, and has a rectangular frame structure in which the mold frame 250 is opened. As the mold frame 250, a synthetic resin having an insulating property may be used.

Below the backlight assembly 200, a lower storage container 300 for receiving and supporting the liquid crystal panel 100, the backlight assembly 200, and the mold frame 250 is disposed.

The lower housing 300 is made of a metal material such as aluminum or aluminum alloy.

Projections 350a and 350b protruding from the bottom surface of the lower storage container 300 to a predetermined height are formed on the rear surface of the lower storage container 300.

In more detail, the projections 350a and 350b are formed from the one side of the bottom surface of the lower storage container 300 to the outside of the lower storage container 300, that is, the rear surface of the first protrusion 350a and the lower storage container. It includes a second projection (350b) protruding from the other side of the bottom of the bottom of the lower receiving container 300, wherein the first and second projections (350a, 350b) is formed in a rectangular parallelepiped shape.

Here, the first and second protrusions 350a and 350b are correspondingly coupled to the coupling guide portions 450a and 450b formed in the protective case 400.

In addition, the first and second protrusions 350a and 350b are integrally formed with the lower storage container 300. For example, a method of pressing and forming a bottom surface of the lower storage container 300 may be used.

A protective case 400 is attached to a rear side of the lower storage container 300 to protect the printed circuit board 120 that is bent and positioned to the rear side of the lower storage container 300.

The protective case 400 prevents the printed circuit board 120 from being exposed to the outside and is damaged, and is formed of the same material as the lower storage container 400.

In the protective case 400, the coupling guides 450a and 450b corresponding to the protrusions 350a and 350b of the lower storage container 300 are integrally formed with the protective case 400.

The coupling guides 450a and 450b protrude from both sidewalls of the protective case 400, and are bent to surround the protrusions 350a and 350b of the lower storage container 300. In addition, the coupling guide parts 350a and 350b may be formed in a hole shape.

In more detail, the coupling guides 450a and 450b protrude from one side wall of the protective case 400 to be bent around the outer circumferential surface of the first protrusion 350a of the lower storage container 300 to be bent. The second coupling guide portion 450b protruding from the other side wall facing the one side wall of the protection case 400 and surrounding the outer circumferential surface of the second protrusion 350b of the lower storage container 300 is bent. Include.

Here, the first and second coupling guides 450a and 450b correspond to the first and second protrusions 350a and 350b, and the heights of the first and second protrusions 350a and 350b are the first and the second protrusions. 2 is substantially equal to or greater than the height of the coupling guide portions 450a and 450b.

In other words, the first and second protrusions 350a and 350b of the lower receiving container 300 are formed by the first and second coupling guides 450a and 450b of the protective case 400 that are coupled to the lower receiving container 300. It is preferable that the height is formed to be equal to or greater than the height from the rear surface of the lower storage container 300 to the first and second coupling guides 450a and 450b.

In addition, the first and second coupling guides 450a and 450b are bent twice along the outer circumferential surfaces of the first and second protrusions 350a and 350b so as to surround the first and second protrusions 350a and 350b having a rectangular parallelepiped shape. It is desirable to be.

The lower receiving container 300 and the protective case 400 of the above-described structure may further include coupling holes 123 and 460 for screw coupling.

The upper accommodating container 500 is coupled to the lower accommodating container 300 to accommodate the liquid crystal panel 100 and the backlight assembly 200 therein and define an effective display area of the liquid crystal panel 100.

In addition, the upper storage container 500 may be coupled to the lower storage container 300 through a hook coupling, for example, a hook (not shown) is formed along the outer surface of the side wall of the upper storage container 500, A hook insertion hole (not shown) corresponding to the hook may be formed at the side of the lower storage container 300. Therefore, the lower storage container 300 is coupled to the lower storage container 300 from the bottom of the upper storage container 500, the hook formed in the upper storage container 500 enters the hook insertion hole of the lower storage container 300, the upper storage container 500 and the lower The storage container 300 may be fastened.

Not only this. The combination of the upper receiving container 500 and the lower receiving container 300 may be modified in various forms using all known methods.

3 is an exploded perspective view of a liquid crystal display according to another exemplary embodiment of the present invention, and FIG. 4 is a rear perspective view of FIG. 3.

For convenience of description, members having the same functions as the members shown in the drawings of FIGS. 1 and 2 are denoted by the same reference numerals, and therefore description thereof is omitted.

As shown in Figs. 3 and 4, the liquid crystal display of this embodiment has a basically identical structure except for the following.

That is, as illustrated in FIGS. 3 and 4, in the liquid crystal display 700 of the present exemplary embodiment, the first and second protrusions 350a ′ and 350b ′ are semicircle from the bottom surface of the lower housing 300. It protrudes in the form of a pillar.

In addition, the coupling guide portions 450a 'and 450b of the protective case 400 corresponding to the first and second protrusions 350a' and 350b 'may have outer peripheral surfaces of the first and second protrusions 350a' and 350b '. Wrapped and bent. The coupling guides 450a 'and 450b' may be formed in a hole shape.

In more detail, the first protrusion 350a ′ is formed by protruding from one side of the bottom surface of the lower storage container 300 to the rear surface of the lower storage container 300, and the bottom surface of the lower storage container 300. A second protrusion 350b 'is formed by protruding from the other side of the lower housing container 300 to the rear surface. The first and second protrusions 350a 'and 350b' formed as described above are correspondingly coupled to the coupling guide portions 450a 'and 450b' of the protective case 400.

As described above with reference to FIGS. 1 and 2, the coupling guides 450a 'and 450b' may include the first and second coupling guides 450a 'and 450b' respectively formed on both sidewalls of the protective case 400. Wherein the first and second coupling guides 450a 'and 450b' are bent to surround the first and second protrusions 350a 'and 350b'.

In addition, the heights of the first and second protrusions 350a 'and 350b' of the lower storage container 300 may correspond to the first and second coupling guides 450a 'of the protective case 400 coupled to the lower storage container 300. , 450b '), that is, the height of the first and second coupling guides 450a' and 450b 'from the rear surface of the lower housing 300 is preferably formed to be substantially the same or larger.

The lower receiving container 300 and the protective case 400 may be formed of the same material, and may further include coupling holes 123 and 460 for screw coupling.

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, according to the liquid crystal display device according to the present invention, the fastening property can be increased and the process time can be shortened when the lower storage container and the protective case are fastened.

Claims (7)

Liquid crystal panels; A lower housing container accommodating the liquid crystal panel and having protrusions formed on a rear surface thereof; A printed circuit board connected to the liquid crystal panel to supply driving and control signals to the liquid crystal panel, bent along sidewalls of the lower container, and positioned on a rear surface of the lower container; And And a protective case coupled to the lower housing so as to cover the printed circuit board, and having a coupling guide formed on a sidewall thereof to correspond to the protrusion. According to claim 1, The coupling guide portion, the first coupling guide portion formed on one side wall of the protective case; And a second coupling guide part formed on the other side wall facing the one side wall, And the first and second coupling guide parts are integrally formed with the protective case. According to claim 1, The projection is a liquid crystal display device having a rectangular parallelepiped or semi-circular pillar shape. According to claim 1, The height of the protrusion is substantially the same as or greater than the height of the coupling guide portion. According to claim 1, The protrusion is formed by pressing the bottom surface of the lower housing. According to claim 1, The lower container and the protective case are formed of a metal material. According to claim 1, The lower container and the protective case is a screw coupling liquid crystal display device.

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