KR200452311Y1 - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display device, comprising a liquid crystal display panel, a light source unit positioned on the rear surface of the liquid crystal display panel, an optical film positioned between the light source unit and the liquid crystal display panel and including a fixing unit, and the light source unit. It accommodates, the receiving container is provided with a fixed coupling portion for coupling with the fixed portion, and a cover member for fixing the combination of the fixed portion and the fixed coupling portion. This provides a liquid crystal display device in which an optical film is stably fixed.

Description

[0001] LIQUID CRYSTAL DISPLAY DEVICE [0002]

 The present invention relates to a liquid crystal display device. More particularly, the present invention relates to a liquid crystal display device in which a combination of an optical film and a storage container is stably fixed using a cover member.

Recently, a flat panel display such as a liquid crystal display (LCD), a plasma display panel (PDP), or an organic light emitting diode (OLED) has been developed in place of the conventional CRT.

The liquid crystal display device includes a thin film transistor substrate, a color filter substrate, and a liquid crystal display panel in which liquid crystal is injected between both substrates. Since the liquid crystal display is a non-light emitting device, a backlight unit for supplying light is disposed on the rear surface of the thin film transistor substrate. Light transmitted from the backlight unit is adjusted according to the arrangement of liquid crystals. The apparatus further includes a chassis accommodating the liquid crystal display panel and the backlight unit.

The backlight unit includes an optical film and a light source unit including an LED, a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), and the like. The optical sheet is disposed between the light source unit and the liquid crystal display panel, and serves to uniformly supply the light generated from the light source unit to the liquid crystal display panel.

However, when the optical film is not stably fixed, the optical film also moves by the liquid crystal display.

Accordingly, an object of the present invention is to provide a liquid crystal display device in which an optical film is stably fixed.

The object of the present invention is to accommodate a liquid crystal display panel, a light source unit positioned on a rear surface of the liquid crystal display panel, an optical film positioned between the light source unit and the liquid crystal display panel, and having a fixing unit, and accommodating the light source unit. It can be achieved by a liquid crystal display including a storage container having a fixed coupling portion for coupling, and a cover member for fixing the coupling of the fixed portion and the fixed coupling portion.

Preferably, the fixing part protrudes from the optical film and a fixing hole is formed.

The fixed coupling portion preferably includes a fixing pin into which the fixing hole is inserted.

The cover member has a 'c' shape, it is preferable that the upper plate portion surrounding the fixing portion, the side portion surrounding the side of the storage container and the lower plate portion surrounding the storage container opposite the fixing portion.

Preferably, the fixed coupling part includes a guide groove in which the fixing part of the optical film is accommodated, and a fixing groove connected to the guide groove.

The guide groove is formed parallel to the plate surface direction of the optical film, the fixing groove is preferably formed perpendicular to the plate surface direction of the optical film.

The cover member preferably includes a support, and a coupling pin coupled to the fixing hole through the fixing groove and the guide groove.

An auxiliary groove is formed in the fixed coupling portion, and the cover member is preferably formed with an auxiliary coupling pin for coupling with the auxiliary groove.

The reflector further comprises a reflector plate formed in the lower portion of the light source and having a fixing hole, the receiving vessel is formed with a reflector plate guide groove for receiving the fixing portion of the reflector plate, the fixing groove is the reflector plate guide groove It is preferable to extend to.

The coupling pin is preferably coupled to the reflector plate fixing hole.

The height of the cover member is preferably included in the height of the storage container.

As described above, according to the present invention, a liquid crystal display device in which an optical film is stably fixed is provided.

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

In the following examples, the same reference numerals refer to the same components. The same components are representatively described in the first embodiment and may be omitted in other embodiments.

1 is an exploded perspective view of a liquid crystal display device according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view of the liquid crystal display device according to the first embodiment of the present invention.

The liquid crystal display device 1 includes a liquid crystal display panel 20, a plurality of optical films 30 disposed on the rear surface of the liquid crystal display panel 20, and a pair of light source units disposed along both sides of the liquid crystal display panel 20. 40), a light guide plate 44 disposed between the pair of light source units 40, and a reflecting plate 45 positioned below the light source unit 40. These are accommodated between the upper storage container 10 and the lower storage container (50). In addition, the coupling between the optical film 30 and the lower housing 50 is fixed by the cover member (60).

The liquid crystal display panel 20 bonds the thin film transistor substrate 21 on which the thin film transistor is formed, the color filter substrate 22 facing the thin film transistor substrate 21, and the two substrates 21 and 22 to each other, thereby bonding a cell gap. a sealant 23 forming a gap), and a liquid crystal layer 24 positioned between both substrates 21 and 22 and the sealant 23. The liquid crystal display panel 20 adjusts the arrangement of the liquid crystal layer 24 to form a screen, but because it is a non-light emitting device, light must be supplied from the light source unit 40 located on the rear surface. One side of the thin film transistor substrate 21 is provided with a driver 25 for applying a drive signal. The driver 25 includes a flexible printed circuit board (FPC. 26), a driving chip (27) mounted on the flexible printed circuit board (26), and a circuit board (PCB) connected to the other side of the flexible printed circuit board (26). 28). The driver 25 illustrated represents a chip on film (COF) method, and other known methods such as a tape carrier package (TCP) and a chip on glass (COG) may be used. In addition, the driver 25 may be mounted on the thin film transistor substrate 21.

The optical film 30 disposed on the rear surface of the liquid crystal display panel 20 includes a diffusion film 31, a prism film 32, and a protective film 33.

The diffusion film 31 consists of a base plate and a bead-shaped coating layer formed on the base plate. The diffusion film 31 diffuses the light from the light source unit 40 and supplies the light to the liquid crystal display panel 20. The diffusion film 31 may be used by overlapping two or three sheets. Since the diffusion film 31 is not supported by the light guide plate, the diffusion film 31 may be somewhat thicker for strength.

The prism film 32 is formed with a triangular prism-shaped prism on the upper surface. The prism film 32 collects light diffused from the diffusion film 31 in a direction perpendicular to the plane of the upper liquid crystal display panel 20. Two prism films 32 are usually used, and the micro prisms formed on the prism films 32 are at an angle. The light passing through the prism film 32 is almost vertically progressed to provide a uniform luminance distribution.

The protection film 33 positioned at the top protects the prism film 32 that is weak to scratches.

Four fixing parts 34 are provided around the optical film 30. The fixing part 34 protrudes from the optical film 30 in a rectangular shape and is integrally formed with the optical film 30. A fixing hole 35 is formed in the fixing part 34, and the fixing hole 35 is inserted into the fixing pin 52 of the lower storage container 50 to be described later.

The light source units 40 are provided in pairs and are positioned along opposite sides of the liquid crystal display panel 20. The light source unit 40 includes a lamp 41 and electrode portions 42 provided at both ends of the lamp 41. The light source unit 40 may be a cold cathode fluorescent lamp (CCFL) or an external electrode fluorescent lamp (EEFL), or an LED may be used.

The light source unit 40 is accommodated in the reflective cover 43. The reflecting cover 43 has a 'c' shape and reflects light generated from the light source 40 toward the light guide plate 44 to increase the light efficiency.

The light guide plate 44 is usually made of an acrylic resin and serves to uniformly supply the light generated from the light source 40 to the diffusion film 31.

The reflector 45 is positioned below the light guide plate 44 and serves to supply the light to the light guide plate 44 by reflecting light toward the bottom again. The reflector 45 may be made of polyethylene terephthalate (PET) or PC (polycarbonate).

The liquid crystal display panel 20, the optical film 30, the light source unit 40, and the like described above are accommodated between the upper storage container 10 and the lower storage container 50.

The lower receiving container 50 is fastened to the upper receiving container 10 and fixed coupling parts 51 and 52 are provided. The lower receiving container 50 and the upper receiving container 10 are fastened using screws (not shown). Specifically, the upper container 10 may be a chassis made of metal, the lower container 50 may be a plastic mold.

Unlike the embodiment, it may be configured as a separate lower chassis coupled with the upper storage container 10, and a mold supporting the optical film 30. In this case, the fixed coupling parts 51 and 52 are provided in a mold supporting the optical film 30. The mold may have a rectangular shape or may be rod-shaped.

The fixed coupling parts 51 and 52 are formed on the side surface of the lower storage container 50 and extend in the depression 51 and the depression 51 and are fixed to the liquid crystal display panel 20 toward the liquid crystal display panel 20. ). The depression 51 is formed along the upper, lower, and side surfaces of the lower storage container 50 to cover the cover member 60 to be described later in the height of the lower storage container 50.

The cover member 60 is provided as a clip type and is provided with an upper plate portion 61 and a lower plate portion 63 facing each other in a 'c' shape and a side portion 62 connecting them. The cover member 60 may be made of metal and may use a press molding method.

Hereinafter, the coupling between the optical film 30 and the lower housing container 50 in the liquid crystal display according to the first embodiment of the present invention will be described with reference to FIG. 3.

The fixing part 34 of the optical film 30 is located in the recessed part 51 of the lower storage container 50. Among the depressions 51, the portion where the fixing portion 34 is located is further recessed downward, whereby the heights of the fixing portion 34 and the peripheral depression 51 are substantially the same. Here, the fixing hole 35 provided in the fixing part 34 is inserted into the fixing pin 52 of the lower storage container 50. The combination of the fixing hole 35 and the fixing pin 52 prevents the optical film 30 from moving in the horizontal direction. However, the optical film 30 may move in the vertical direction, and the fixing hole 35 may be separated from the fixing pin 52, which is prevented by the cover member 60.

The upper plate 61 of the cover member 60 surrounds the fixing portion 34 and the upper recess 51 of the optical film 30, and the lower plate 63 surrounds the recess 51 of the opposite side and the upper plate portion The side part 62 which connects 61 and the lower board part 63 has enclosed the recessed part 51 of the side surface. Here, in order to prevent the separation of the fixing hole 35 and the fixing pin 52, the height of the fixing pin 52 is preferably somewhat larger than the height of the upper plate portion 61 of the cover member 60. As described above, since the heights of the fixing part 34 and the peripheral recess 51 are substantially the same, the upper plate part 61 reliably surrounds the fixing part 34 and the upper recess 51.

The height of the cover member 60 is preferably included in the lower receiving container (50). That is, it is preferable that the upper plate portion 61, the side portion 62, and the lower plate portion 63 of the lid member 60 do not protrude from the lower storage container 50. This is to prevent the size of the liquid crystal display device 1 due to the cover member 60 or to prevent the cover member 60 from coming into contact with other components.

Hereinafter, the assembly process of the liquid crystal display according to the first embodiment of the present invention will be described with reference to FIGS. 4A and 4B.

First, as shown in FIG. 4A, the fixing part 34 of the optical film 30 is positioned in the recess 51 of the lower storage container 50. In this process, the fixing hole 35 formed in the fixing part 34 is inserted into the fixing pin 52 protruding from the recess 51.

In the state in which the fixing hole 35 is inserted into the fixing pin 52, the cover member 60 is advanced in the lateral direction of the lower storage container 50 and coupled as shown in FIG. 4B. Accordingly, the upper plate portion 61 of the cover member 60 wraps around the fixing portion 34 and the upper recessed portion 51 of the optical film 30, and the lower plate portion 63 surrounds the recessed portion 51 on the opposite side. The side portion 62 connecting the upper plate portion 61 and the lower plate portion 63 surrounds the recess 51 of the side surface. As a result, the coupling between the fixed part 34 and the fixed coupling parts 51 and 52 is completed, and the movement of the optical film 30 in the horizontal direction can be prevented as well as the vertical movement.

Hereinafter, the coupling and the coupling method of the optical film 30 and the lower storage container 50 in the liquid crystal display according to the second embodiment of the present disclosure will be described with reference to FIGS. 5 to 6B.

In the second embodiment, the fixed coupling parts 51, 53, 54, and 55 formed in the lower storage container 50 have depressions 51 and depressions 51 formed on an upper portion of the lower storage container 50. It includes a fixing groove 53 and the auxiliary groove 55 and the guide groove 54 formed in the middle portion of the lower housing 50. Unlike the first embodiment, the recess 51 is formed only on the upper portion of the lower housing container 50 because the cover member 70 is coupled to only the upper portion of the lower storage container 50. The fixing grooves 53 are formed in the vertical direction with the liquid crystal display panel 20, and the guide grooves 54 are formed in the horizontal direction with the liquid crystal display panel 20 so that the extending directions thereof are perpendicular to each other. The fixing groove 53 and the guide groove 54 are connected to each other. The fixing portion 34 of the optical film 30 is inserted into the guide groove 54 and extends from the inside of the lower storage container 50. Therefore, the height of the guide groove 54 should be able to accommodate the thickness of the optical film 30, the width of the guide groove 54 should be equal to or slightly larger than the width of the fixing portion (34). The auxiliary groove 55 serves to fix the cover member 70, and unlike the fixing groove 53, the auxiliary groove 55 is not connected to the guide groove 54.

In the second embodiment, the shape of the fixing part 34 of the optical film 30 is similar to that of the first embodiment. However, since the recess 51 is formed only on the upper portion of the lower storage container 50, unlike the first embodiment, the length of the fixing part 34 may be somewhat longer. That is, since the side of the lower container 50 is not recessed, the length of the fixing part 34 may be extended by the length not recessed. This makes it easy to secure the design margin of the fixing part 34.

The cover member 70 has a support 71 located in the recess 51 of the lower storage container 50, a coupling pin 72 extending from the support 71, and an auxiliary coupling pin 73. The support 71 is formed in a substantially rectangular shape, the height of which is equal to or smaller than the depth of depression of the depression 51, so that the height of the support 71 is included in the lower storage container 50 when coupled. The length of the coupling pin 72 is longer than the auxiliary coupling pin 73 and the auxiliary coupling pin 73 is provided in a pair. The cover member 70 may be made of metal or plastic and may use a mold molding method in manufacturing.

In the combined state, the fixing part 34 of the optical film 30 is accommodated in the guide groove 54 formed from the inside of the lower housing 50. The cover member 70 is located in the depression 51 of the lower storage container 50. Coupling pin 72 of the cover member 70 is inserted into the fixing groove 53, extending to the guide groove 54, the fixing hole 35 of the fixing portion 34 is inserted into the guide groove 54 Combined with. The auxiliary coupling pin 73 of the cover member 70 is coupled to the auxiliary groove 55 provided in the depression 51 to fix the cover member 70 to the lower storage container (50). To this end, the diameter of the auxiliary groove 55 should be the same or somewhat smaller than the diameter of the auxiliary coupling pin (73).

Looking at the assembly process of the liquid crystal display device according to the second embodiment of the present disclosure, as shown in FIG. 5A, the fixing part 34 of the optical film 30 is positioned in the guide groove 54 of the lower storage container 50. In this process, the fixing hole 35 of the fixing part 34 is also located in the guide groove 54, and the fixing hole 35 is positioned to be connected to the fixing groove 53.

In the state where the fixing part 34 is located in the guide groove 54, the cover member 70 is advanced from the upper direction of the lower storage container 50 to the lower direction as shown in FIG. 5B so that the cover member 70 is moved to the lower storage container ( 50). By this, the coupling pin 72 of the cover member 70 is coupled to the fixing hole 35 of the optical film 30 through the fixing groove 53 and the guide groove 54, and the secondary coupling of the cover member 70 The pin 73 is coupled to the auxiliary groove 55 formed in the depression 51, the support portion 71 of the cover member 70 is to be seated in the depression 51.

Hereinafter, the coupling between the optical film 30 and the lower housing 50 in the liquid crystal display according to the third embodiment of the present invention will be described with reference to FIG. 7.

In the third embodiment, the fixed coupling parts 51, 53, 54, 55, and 56 provided in the lower storage container 50 are reflecting plate guide grooves 56 positioned below the guide grooves 54, unlike the second embodiment. It includes more. The reflector guide groove 56 is parallel to the guide groove 54 and is connected to the fixing groove 53 extending from the top. That is, the fixing groove 53 connects both the guide groove 54 and the reflector guide groove 54.

The structure of the optical film 30 according to the third embodiment is similar to that of the second embodiment. Meanwhile, the reflector 45 positioned under the light source 40 has a reflector fixing part 46. The reflecting plate fixing part 46 protrudes from the reflecting plate 45, like the fixing part 34 of the optical film 30, and has a reflecting plate fixing hole (not shown). The fixing part 34 of the optical film 30 and the reflecting plate fixing part 46 of the reflecting plate 45 are provided at positions corresponding to each other.

The cover member 70 is also similar to the second embodiment, but the coupling pin 72 has to be extended to the reflector guide groove 56 so that the length is somewhat longer than that of the second embodiment.

In the combined state, the optical film 30 is coupled as in the second embodiment, and the reflecting plate fixing part 46 of the reflecting plate 45 is the coupling pin 72 of the cover member 70 extending to the reflecting plate guide groove 56. It is fixed by). As a result, the movement of the reflector 45 as well as the optical film 30 is limited, thereby further improving the quality of the liquid crystal display.

The above embodiments may be variously modified. In the embodiment illustrated that the light source is provided in the edge type, but the present invention can be applied to the direct type. In addition, the position, number, shape, and the like of the fixing part 34 provided in the optical film 30 may be variously modified, and accordingly, the shape of the lower storage container 50 may be changed.

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

2 is a cross-sectional view of a liquid crystal display device according to a first embodiment of the present invention;

3 is a view for explaining the combination of the optical film and the lower housing in the liquid crystal display according to the first embodiment of the present invention,

4A and 4B are views for explaining an assembly process of a liquid crystal display device according to a first embodiment of the present invention;

5 is a view for explaining the combination of the optical film and the lower housing in the liquid crystal display according to the second embodiment of the present invention,

6A and 6B are views for explaining an assembly process of a liquid crystal display device according to a second embodiment of the present invention;

7 is a view for explaining the combination of the optical film and the lower housing in the liquid crystal display according to the third embodiment of the present invention.

Explanation of Signs of Major Parts of Drawings

10: upper storage container 20: liquid crystal display panel

30 optical film 34 fixed part

35: fixing hole 40: light source

45: reflector 46: reflector fixing portion

50: lower storage container 51: depression

52: fixing pin 53: fixing groove

54: guide groove 55: auxiliary groove

56: reflector guide groove 60, 70: cover member

Claims (10)

A liquid crystal display panel; A light source unit disposed on a rear surface of the liquid crystal display panel; An optical film disposed between the light source unit and the liquid crystal display panel and having a fixing unit; A storage container accommodating the light source part and having a fixed coupling part coupled to the fixed part; And a cover member which fixes the combination of the fixing portion and the fixing coupling portion. The method of claim 1, And the fixing part protrudes from the optical film and has a fixing hole formed therein. The method of claim 2, The fixed coupling portion of the liquid crystal display device comprising a fixing pin into which the fixing hole is inserted. The method of claim 2, The cover member has a '-' shape, the liquid crystal display device comprising an upper plate portion surrounding the fixing portion, a side portion surrounding the side of the storage container and a lower plate portion surrounding the storage container opposite the fixing portion. The method of claim 2, The fixed coupling portion, A guide groove in which the fixing portion of the optical film is accommodated; And a fixing groove connected to the guide groove. The method of claim 5, The guide groove is formed parallel to the plate surface direction of the optical film, And the fixing groove is formed perpendicular to the plate surface direction of the optical film. The method of claim 5, The cover member, A support; And a coupling pin coupled to the fixing hole through the fixing groove and the guide groove. The method of claim 5, An auxiliary groove is formed in the fixed coupling portion, And an auxiliary coupling pin formed in the cover member to couple with the auxiliary groove. The method of claim 5, It further comprises a reflector plate is formed in the lower portion of the light source and having a fixing hole having a fixing hole, The storage container is formed with a reflecting plate guide groove for receiving the fixing portion of the reflecting plate, the fixing groove is extended to the reflecting plate guide groove, And the coupling pin is coupled to the reflective plate fixing hole. The method of claim 1, The height of the cover member is included in the height of the storage container.

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