KR20210057997A - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display device and, more specifically, to a liquid crystal display device for a multi-panel display device having a narrow bezel. According to the present invention, as to an LCD display device, in a state in which a liquid crystal panel and an optical unit are attached and fixed integrally by a film fixer and a metal bar, the metal bar is assembled and coupled with a side of a cover bottom storing an LED assembly and a reflector. Therethrough, a lightweight, thin and narrow bezel can be materialized without a guide panel made of aluminum (Al), and also, the film fixer is located on the rear side of the optical unit to prevent the optical unit from sagging or the like without a separate glass diffusion plate. Therethrough, the guide panel made of aluminum (Al) and the glass diffusion plate can be obviated to reduce material costs, and also, separate equipment and processes for aligning and fixing the glass diffusion plate can be obviated, which can lead to an improvement in process efficiency.

Description

Liquid crystal display device

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device for a multi-panel display device having a narrow bezel.

In recent years, as society enters the era of full-scale information, the field of display processing and displaying a large amount of information has rapidly developed, and in response to this, various display devices have been developed and are in the spotlight.

Specific examples of such a display device include a liquid crystal display device (LCD), a plasma display panel device (PDP), a field emission display device (FED), and an electroluminescent display device ( Electroluminescence Display device: ELD), organic light emitting diodes (OLED), etc. These display devices exhibit excellent performance of thinner, lighter, and low power consumption, so that the existing cathode ray tube (CRT) can be used. It is rapidly replacing.

Such a display device has advantages in high-definition, ultra-thin, lightweight, and large-area, space utilization, interior and design advantages, and can have various application fields.

In particular, recently, in order to implement a single image as a large screen (approximately 100 inches) like a video wall, a so-called "Tiled" type multi-panel display device combining a plurality of display devices. ) Is being actively researched.

Such a multi-panel display device is formed by fixing a plurality of display devices to a wall one by one, and each display device may be formed of a liquid crystal display device (hereinafter referred to as an LCD).

Meanwhile, in order to implement a multi-panel display device as a plurality of liquid crystal display devices, the liquid crystal display device must be designed to have a narrow bezel. To this end, the guide panel made of aluminum (Al) and the diffusion plate are prevented from sagging. The glass diffuser plate is used as an essential component.

Such a multi-panel display device has a problem that the processing cost increases due to the increase in material cost, and also requires a separate equipment and process for aligning and fixing the glass diffusion plate, so the efficiency of the process It also has a problem of lowering.

The present invention is to solve the above problems, and it is a first object of the present invention to provide a multi-panel display device including an LCD having a light weight and a thin shape and a narrow bezel.

In addition, the second object is to reduce process cost and improve process efficiency.

In order to achieve the object as described above, the present invention provides a liquid crystal panel, an optical unit attached to the lower portion of the liquid crystal panel, a fixer attached to the lower portion of the optical unit, and exposure along the edge of the optical unit. And a connecting member attached to the edge of the fixer, an LED assembly including a plurality of LEDs, a horizontal surface on which a reflector positioned under the plurality of LEDs is seated, and a side surface bent along an edge of the horizontal surface. A liquid crystal display device comprising a cover butt, wherein the side surface and the connecting member are assembled and fastened to each other.

Here, the connecting member has a bar shape corresponding to one edge of the cover butt, overlaps with a double layer or consists of a single layer, and is located along the four edges of the cover butt, and the connecting member is the edge A vertical portion attached to the portion, and a bent portion bent at a predetermined angle from the vertical portion toward the side, and the side surface includes a bent side portion that is bent at a predetermined angle from the side to the outside, corresponding to the bent portion, The bent portion and the bent side portion are in close contact with each other to be assembled and fastened.

In addition, the bent portion and the bent side portion are assembled and fastened through a screw or attached to each other through an adhesive pad, and a buffer pad is interposed between the bent portion and the bent side portion.

Further, a reflective pad is positioned inside the vertical portion, the reflective plate includes a bottom surface corresponding to the horizontal surface and a side surface corresponding to the side surface, and the side surface extends to cover the bent side surface portion.

In addition, a light pattern is located on the side surface, and the light pattern is located within a beam angle of the LED.

In addition, the optical unit includes first and second diffusion units and a luminance enhancing unit, wherein the first diffusion unit includes a first base layer, and a plurality of structures protruding and arranged to be spaced apart from each other at a predetermined interval above the first base layer, And a lenticular lens positioned in spaced apart regions of the plurality of structures, wherein the second diffusion part includes a second base layer and a light diffusion layer formed of a binder containing beads on the second base layer, the The luminance enhancing part is a DBEF (Dual Brightness Enhancement Film), a first air gap is provided between the lenticular lens and the second diffusion part, and a second air gap is provided between the light diffusion layer and the luminance enhancing part.

As described above, in a display device comprising an LCD according to the present invention, in a state in which a liquid crystal panel and an optical unit are integrally attached and fixed by a film fixer and a metal bar, By assembling and fastening, there is an effect of implementing a lightweight, thin, and narrow bezel, even though a guide panel made of aluminum (Al) is not provided.

In addition, by placing the film fixer on the back side of the optical unit, it is possible to prevent sagging of the optical unit from being issued even if a separate glass diffusion plate is not provided. Through this, a guide panel and glass made of aluminum (Al) Since the diffusion plate can be omitted, material cost can be reduced, and additional equipment and processes for aligning and fixing the glass diffusion plate can be omitted, thereby improving the efficiency of the process.

1 is a schematic perspective view of a multi-panel display device according to an exemplary embodiment of the present invention.
2 is an exploded perspective view schematically showing an LCD for a multi-panel display device according to an embodiment of the present invention.
Figure 3 is a schematic cross-sectional view of a portion of Figure 2 modularized.
4 is a cross-sectional view schematically showing the configuration of an optical unit and a film fixer according to an embodiment of the present invention.
5A to 5B are cross-sectional views showing an enlarged area A of FIG. 3.
6A to 6C are cross-sectional views schematically illustrating a process of modularizing the LCD for a multi-panel display device according to the embodiment of the present invention of FIG.
7A to 7B are simulation results obtained by comparing and measuring a luminance distribution amount of a general LCD and a display device according to an embodiment of the present invention.
8A to 8B are simulation results obtained by comparing and measuring a viewing angle distribution of a general LCD and a display device according to an embodiment of the present invention.
9A to 9B are perspective views schematically showing corners of cover buttocks of a display device made of an LCD according to an embodiment of the present invention.

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

1 is a schematic perspective view of a multi-panel display device according to an exemplary embodiment of the present invention.

As shown, the multi-panel display device 100 has a structure in which a plurality of display devices 110 are connected, and each display device 110 outputs an image signal supplied from the outside to a screen. The display device 110 of is modularized by the display device 110 and a housing 113 for accommodating the components of the display device 110.

Here, each of the display devices 110 may be made of a liquid crystal display device (LCD) that is in the spotlight as a display device with low power consumption, good portability, and high added value.

The display device 110 made of such an LCD includes a lower substrate 112 (see FIG. 3), an upper substrate 114 (see FIG. 3), and a liquid crystal layer formed between the two substrates 112 and 114 (see FIG. 3). (Not shown) and a liquid crystal panel 111 (see FIG. 3) and a backlight unit 120 (see FIG. 2) supplying light to the liquid crystal panel 111 (see FIG. 3).

That is, in the display device 110 made of an LCD, light flows from the backlight unit 120 (see FIG. 2) to the liquid crystal panel 111 (see FIG. 2), and the liquid crystal layer (not shown) of the liquid crystal panel 111 (see FIG. 2). The image is displayed by adjusting the transmittance of light according to the arrangement of (city).

The backlight unit 120 (see FIG. 2) includes a plurality of light sources 128a (see FIG. 2), and includes a reflector 125 (see FIG. 2) positioned under the light source 128a (see FIG. 2) and a light source 128a, FIG. 2) The light emitted from the light source 128a (see FIG. 2) including the upper optical unit 121 (see FIG. 2) has a uniform high quality in the process of passing through the optical unit 121 (see FIG. 2). It is processed into a surface light source of and is incident on the liquid crystal panel 111 (see FIG. 2), and the liquid crystal panel 111 (see FIG. 2) displays a high-brightness image to the outside.

The display device 110 is accommodated in the housing 113, and the housing 113 includes an accommodation space for accommodating the display device 110 to protect the display device 110 seated on the housing 113. At the same time, the entire display apparatus 110 is supported.

In this way, the housing 113 is configured to divide the exterior and the interior while accommodating the display device 110 and protect the components mounted therein, and may be divided into a single body or a plurality of bodies according to design conditions. I can.

Inside the housing 113, a power supply unit that provides power required for driving the display device 110, and a driving board for converting an external electric signal into an image and sound may be provided.

The plurality of display devices 110 are fixed to the wall W, one by one, and are arranged in a "Tiled" form to form a multi-panel display device 100. The multi-panel display device 100 includes a video wall and a video wall. Likewise, one image may be implemented on a large screen of approximately 100 inches or larger, or each of the display apparatuses 110 may implement separate and different images.

At this time, in the multi-panel display device 100 according to the embodiment of the present invention, each display device 110 is made of an LCD having a light weight, thin shape, and a narrow bezel, while reducing process cost and improving process efficiency. It is characterized.

2 is an exploded perspective view schematically showing an LCD for a multi-panel display device according to an embodiment of the present invention.

As shown, the LCD, which is a display device 110 for a multi-panel display device according to an embodiment of the present invention, includes a liquid crystal panel 111 and a backlight unit 120, and a liquid crystal panel 111 and a backlight unit 120. It consists of a cover bottom 150 and a metal bar 160 for modularization.

At this time, if the direction on the drawing is defined for convenience of description, the backlight unit 120 is disposed behind the liquid crystal panel 111 on the premise that the display surface of the liquid crystal panel 111 faces forward, and the backlight unit 120 ), the cover buttoum 150 is positioned on the back of the module to be modularized.

Let's take a closer look at each of these.

First, the liquid crystal panel 111 is a part that plays a key role in image expression, and includes first and second substrates 112 and 114 bonded to each other with a liquid crystal layer (not shown) therebetween.

At this time, although it is not clearly shown in the drawing under the premise of the active matrix method, a plurality of gate lines and data lines cross the inner surface of the first substrate 112, which is usually called a lower substrate or an array substrate. It is defined, and is provided with a thin film transistor (TFT) at each intersection point, and is connected to a transparent pixel electrode formed in each pixel in a one-to-one correspondence.

And the inner surface of the second substrate 114 called the upper substrate or the color filter substrate, as an example corresponding to each pixel, is a color filter of red (R), green (G), and blue (B) colors, and these A black matrix is provided surrounding each of the gate lines, data lines, and non-display elements such as thin film transistors. In addition, a transparent common electrode covering them is provided.

In addition, although not clearly shown in the drawing, the boundary between the two substrates 112 and 114 of the liquid crystal panel 111 and the liquid crystal layer (not shown) has upper and lower alignment layers (not shown) that determine the initial molecular arrangement direction of the liquid crystal. ) Is interposed therebetween, and a seal pattern is formed along the edges of both substrates 112 and 114 to prevent leakage of the liquid crystal layer (not shown) filled therebetween.

At this time, upper and lower polarizing plates 119b and 119a (refer to FIG. 3) are attached to outer surfaces of the first and second substrates 112 and 114, respectively.

In addition, a printed circuit board 117 is connected to one side of the liquid crystal panel 111 through a connecting member 116 such as a flexible printed circuit board, wherein the connecting member 116 is a liquid crystal It is attached to and connected to the side of the panel 111.

A backlight unit 120 that supplies light is provided on the rear surface of the liquid crystal panel 111 so that the difference in transmittance indicated by the liquid crystal panel 111 is expressed to the outside.

The backlight unit 120 is fixed through the LED assembly 128 located on the rear surface of the liquid crystal panel 111, the reflector 125, and the LED assembly 128 and the guide support 127 to the top of the LED assembly 128. It includes an optical unit (121) that are spaced apart from each other.

The LED assembly 128 is a light source of the backlight unit 120, and is spaced apart on the PCB 128b and the PCB 128b in the shape of a plate that is seated in the horizontal plane 151 of the cover bottom 150. It includes a plurality of LEDs (128a) to be mounted.

In this case, the PCB 128b may be divided into a plurality of bar shapes.

In order to improve luminous efficiency and luminance, a plurality of LEDs 128a use a blue LED 128a including a blue LED chip having excellent luminous efficiency and luminance, and as a phosphor,'ceium-doped yttrium aluminum garnet (YAG:Ce). )', that is, a blue LED 128a made of a yellow phosphor is used.

The blue light emitted from the LED 128a passes through the phosphor and is mixed with the yellow light emitted by the phosphor to emit white light toward the optical unit 121.

At this time, a light diffusion lens 129 is provided above each of the LEDs 128a, and the light diffusion lenses 129 positioned above the plurality of LEDs 128a respectively direct light emitted from the plurality of LEDs 128a. It serves to improve the angle.

Here, the reflector 125 is configured with a plurality of through holes 125c through which the light diffusion lens 129 positioned above the plurality of LEDs 128a can pass, and the PCB 128b excluding the light diffusion lens 129 is configured. By covering both the horizontal surface 151 and the side surface 153 of the and cover bottom 150, the luminance of the light is improved by reflecting the light directed to the rear surface of the plurality of LEDs 128a toward the optical unit 121.

That is, the reflective plate 125 is formed of a white or silver plate, and includes a plurality of through holes 125c and covers the horizontal surface 151 of the cover bottom 150, and the bottom surface 125a It includes a side surface 125b that is bent upward along the edge of 125a and covers the inside of the side surface 153 of the cover buttum 150.

An optical pattern 125d is formed on the side surface 125b.

An optical unit 121 for uniformity of luminance is positioned on the plurality of light diffusion lenses 129 exposed through the through hole 125c of the reflector 125, and the optical unit 121 includes first and second light diffusion lenses. A composite optical sheet including diffusion units 131a and 131b (refer to FIG. 4) and brightness enhancing units 131a and 131c (refer to FIG. 4), and processing the light emitted from the LED assembly 128 into high-quality liquid crystal panel 111 ).

Here, the optical unit 121 is supported through the guide support 127 to prevent sagging.

At this time, a portion of the rear edge of the liquid crystal panel 111 is attached and fixed to the upper portion of the optical unit 121 through an adhesive pad 118 (refer to FIG. 3) having adhesiveness.

The liquid crystal panel 111 and the backlight unit 120 are integrally modularized through the cover bottom 150 and the metal bar 160.

Here, the liquid crystal panel 111 and the backlight unit 120 are mounted so that the cover bottom 150, which is the basis for assembling the entire apparatus of the display device 110 formed of an LCD, includes a plate-shaped horizontal surface 151 and a horizontal surface. The edge of 151 is made of a side surface 153 that is vertically bent.

In addition, the metal bar 160 is formed in a bar shape corresponding to each of the four edges of the cover buttom 150, and the metal bar 160 is a film fixer positioned on the rear surface of the optical unit 121. ) (170 (see FIG. 3)) and the cover buttoum 150 in a state attached and fixed, the liquid crystal panel 111 and the backlight unit 120 according to the exemplary embodiment of the present invention are integrally modularized. .

Through this, the present invention can provide a display device 110 made of an LCD having a light weight and thin shape and a narrow bezel, while the guide panel and glass diffusion plate made of aluminum (Al) can be omitted, thereby reducing material cost. , In addition, separate equipment and processes for aligning and fixing the glass diffusion plate can be omitted, so that the efficiency of the process is also improved.

This will be described in more detail with reference to the drawings below.

3 is a cross-sectional view schematically showing a part of FIG. 2, which is modularized, and FIG. 4 is a cross-sectional view schematically showing the configuration of an optical unit and a film fixer according to an embodiment of the present invention.

5A to 5B are cross-sectional views showing an enlarged area A of FIG. 3, and FIGS. 6A to 6C are cross-sectional views schematically illustrating a modularization process of the LCD for a multi-panel display device according to the embodiment of the present invention of FIG. 2.

As shown in Fig. 3, the LED assembly 128 in which a plurality of LEDs 128a are mounted on the plate-shaped PCB 128b and the PCB 128b, and each LED on the top of the LED 128a The optical unit 121 is provided on the LED assembly 128 and the light diffusion lens 129 positioned corresponding to 128a, the reflector 125 exposing only the light diffusion lens 129 through the through hole 125c. It is stacked to form the backlight unit 120.

In addition, a liquid crystal panel 111 with a liquid crystal layer (not shown) interposed therebetween is located on the first and second substrates 112 and 114 on the backlight unit 120, and the first and second substrate 112 Polarizing plates 119a and 119b for selectively transmitting only specific light are attached to each outer surface of the, 114).

Here, in the liquid crystal panel 111, the first substrate 112 and the second substrate 114 are configured in the same shape, so that one end of the first substrate 112 and the second substrate 114 coincide with each other, Pads (not shown) provided at the ends of a plurality of wirings (not shown) provided on the first substrate 112 are exposed to the side surfaces between the first substrate 112 and the second substrate 114 .

One side of the liquid crystal panel 111 is connected to a printed circuit board (117 in FIG. 2) via a connecting member (116 in FIG. 2), wherein the connecting member (116 in FIG. 2) is connected to the side of the liquid crystal panel 111 It is attached and connected.

The backlight unit 120 and the liquid crystal panel 111 are integrally modularized through the cover bottom 150 and the metal bar 160.

Looking at this in more detail, the LED assembly 128 is mounted on the horizontal surface 151 of the cover bottom 150, and the light diffusion lens 129 is located above each LED 128a of the LED assembly 128. , The reflector 125 is positioned to expose only the light diffusion lens 129 through the through hole 125c above the LED assembly 128.

Here, the reflective plate 125 includes a plurality of through holes 125c and is bent upward along the edge of the bottom surface 125a and the bottom surface 125a covering the horizontal surface 151 of the cover bottom 150 It includes a side surface (125b) covering the inner side of the side (153) of (150).

At this time, the side surface 125b forms an obtuse angle from the bottom surface 125a and is formed to be uniformly inclined, so that the light emitted from the plurality of LEDs 128a can be refracted in a direction toward the optical unit 121.

In addition, the light pattern 125d is formed on the side surface 125b, and the light pattern 125d is a pattern for increasing the luminance of light refracted from the side surface 125b where the LED 128a, which is a light source, is not located. , It may be made of a perforated pattern formed through an injection method, or may be made of an embossed pattern formed by applying a printing method or tape using bright ink such as white and silver.

The light pattern 125d may be formed on the entire inner surface of the side surface 125b, but it is preferable to form it so as to be positioned within the directivity angle of light emitted from the LED 128a as a light source as shown.

In addition, the optical pattern 125d may be formed so that the density of the pattern decreases as the distance from the bottom surface 125a decreases. For example, the distance between the patterns becomes uniform as the distance from the bottom surface 125a increases, but the size of the pattern is small. Alternatively, the pattern size may be uniform as it moves away from the bottom surface 125a, but the pattern may be formed so that the distance between the patterns increases.

Alternatively, a low-reflective pattern having a low reflectance may be formed adjacent to the bottom surface 125a, and a high-reflective pattern having a high reflectance higher than the low reflectance may be formed at a location far from the bottom surface 125a.

In addition, the optical unit 121 is positioned at a predetermined distance apart from the top of the LED assembly 128, and the optical unit 121 is supported through the guide support 127.

In this case, a liquid crystal panel 111 is positioned above the optical unit 121, and the liquid crystal panel 111 is attached and fixed to and from the optical unit 121 through an adhesive pad 118 provided along the rear edge.

In addition, a film fixer 170 is attached to the rear surface of the optical unit 121. That is, as shown in FIG. 4, the optical unit 121 has the first and second diffusion parts 130a and 130b and the brightness improvement. A portion 130c is included, wherein the first and second diffusion portions 130a and 130b and the luminance enhancing portion 130c are sequentially stacked and formed integrally through the adhesive layers 133a, 133b, 133c, and 133d.

Here, the first and second diffusers 130a and 130b diffuse light incident from the LED 128a, which is a light source of the backlight unit 120, to prevent the light from being partially concentrated.

The first diffusion part 130a includes a first base layer 131a, a plurality of structures 135 protruding and arranged protruding at predetermined intervals on the first base layer 131a, and a spaced apart of the plurality of structures 135. It includes a plurality of lenticular lenses 137 arranged to protrude on the first base layer 131a in the inter-region.

A plurality of lenticular lenses 137 are arranged adjacent to each other in a strip shape along the longitudinal direction of the optical unit 121 to form a shape in which mountains and valleys are repeated. Such a lenticular lens 137 is a light diffusion component such as a bead. Included, or may be configured by forming a fine pattern on the lenticular lens 137 without including a bead.

Through this, the light passing through the lenticular lens 137 is refracted and scattered to be diffused, and thus the non-uniform light emitted from the LED 128a is emitted as uniform light.

In addition, the structure 135 is preferably formed to be higher than the lenticular lens 137, therefore, a first air layer G1 is formed on the lenticular lens 137, so that the lenticular lens 137 The surface diffusion function of is improved.

A second diffusion unit 130b adhered to the first diffusion unit 130a through the first adhesive layer 133a is positioned above the first diffusion unit 130a, and the second diffusion unit 130b is a second diffusion unit 130b. A base layer 131b and a light diffusion layer 134 positioned above the second base layer 131b are provided.

The light diffusion layer 134 contains spherical beads 134b in a transparent resin binder 134a, and a light diffusion function is achieved by the spherical beads 134b.

The binder 134a is an acrylic resin, polyurethane, polyester, fluorine-based resin, silicon-based resin, polyamide, and epoxy resin. ) Can be made of one selected.

The bead 134b may be made of one selected from acrylic resin, polyurethane, polyvinyl chloride, polystyrene, polyacrylonitrile, and polyamide. .

Since the binder 134a and the bead 134b must pass light, it is preferable that the binder 134a and the bead 134b be colorless and transparent.

Here, the average particle diameter of the beads 134b is preferably 1 µm or more and 50 µm or less, and more preferably 2 µm or more and 20 µm or less. If the average particle diameter is smaller than the above range, a satisfactory light diffusion function cannot be exhibited, and if the average particle diameter is larger than the above range, it is difficult to apply the resin composition constituting the light diffusion layer 134.

The amount of the beads 134b mixed in the light diffusion layer 134 is preferably 10 parts by weight or more and 500 parts by weight or less, and more preferably 10 parts by weight or more and 300 parts by weight or less based on 100 parts by weight of the binder 134a. If the amount of the mixed beads 134b is less than the above range, the light diffusion effect will not be satisfactory. On the other hand, if the amount of the mixed beads 134b is greater than the above range, the resin composition constituting the light diffusion layer 134 Becomes difficult to apply.

The bead 134b may vary the light efficiency of the light diffusion layer 134 according to its shape, and the ball-shaped bead 134b refracts light incident from the outside twice from the inside and has a single reflection effect. have.

In addition, the snowman shape or the closed curve shape bead 134b connected to the two balls may have an effect of transmitting light incident from the outside and diffusing the other, and the random shape bead 134b is external The incident light from the inside can be refracted and reflected at multiple angles, resulting in a reflection effect.

In addition, the bead 134b may include another small bead of a small size, and the bead 134b may also have a reflective effect by causing refraction and reflection of light incident from the outside at multiple angles from the inside. have.

The light diffusion layer 134 may be designed so that the bead 134b overlaps in some areas so that the light diffusion layer 134 has a non-uniform height, through which the second diffusion unit 130b and the luminance enhancing unit The second air layer G2 is formed between 130c, so that the surface diffusion function of the light diffusion layer 134 may be further improved.

In addition, in order to further improve the fixing power of the first and second light diffusion units 130a and 130b, the second diffusion unit 130b is formed on the light diffusion layer 134 through the second adhesive layer 133b through the third base layer ( 131c) may be further located, and the third base layer 131c serves to increase the fixing power by increasing the area in which the first and second diffusion parts 130a and 130b and the luminance enhancing part 130c are adhered to each other. do.

Above the third base layer 131c, a luminance enhancing part 130c is positioned through a third adhesive layer 133c, and the luminance enhancing part 130c is a high-brightness diffusion film called a so-called DBEF (Dual Brightness Enhancement Film). As 138), in the high-brightness diffusion film (DBEF) 138, a high-refractive-index layer and a low-refractive-index layer are stacked to re-reflect light lost by reflection back to the upper surface, thereby regenerating light to improve luminance.

The fixer 170 is attached to the lower portion of the optical unit 121, more precisely, to the rear surface of the first base layer 131a of the first diffusion unit 130a through the fourth adhesive layer 133d. ) May be made of a film fixer made of a synthetic resin such as polymethylmethacrylate (PMMA) and polyethylene terephthalate (PET), a thermoplastic resin.

The film fixer 170 is preferably colorless and transparent because light must be transmitted, and has a refractive index similar to that of the optical unit 121 so that light is not refracted between the film fixer 170 and the optical unit 121. It is desirable to do it.

Here, the first to fourth adhesive layers 133a, 133b, 133c, and 133d may be formed of an optical clear adhesive (OCA).

Such a film fixer 170 has a larger area than the optical unit 121, so that the edge portion 170a of the film fixer 170 is exposed along the edge of the optical unit 121, and the exposed film fixer 170 A metal bar 160, which is a connection member, is attached and fixed to the edge portion 170a of ).

The metal bar 160 has a bar shape and is positioned along the four edges of the cover bottom 150, and each metal bar 160 has a length corresponding to the length of each edge of the cover bottom 150 Has.

The metal bar 160 includes a vertical portion 161 and a bent portion 163 bent along one edge of the vertical portion 161 in a direction perpendicular to the length direction.

Here, although it is shown as an example that the metal bar 160 is formed by overlapping with a double layer in the drawing, the metal bar 160 may be formed of a single layer, and the shape and thickness of the metal bar 160 can be applied to the desired stiffness. It can be adjusted variously according to the

The edge portion 170a of the film fixer 170 attached to the rear surface of the optical unit 121 is attached and fixed to the outside of the vertical portion 161 of the metal bar 160. At this time, the edge portion 170a of the film fixer 170 is attached to the vertical portion 161 of the metal bar 160 through an optical clear adhesive (OCA) (not shown).

In this way, the metal bar 160 attached to the edge portion 170a of the film fixer 170 attached to the rear surface of the optical unit 121 has the bent portion 163 and the side surface 153 of the cover buttum 150 By assembling and fastening, the liquid crystal panel 111 and the backlight unit 120 are integrated.

That is, in the display device 110 comprising the LCD according to the embodiment of the present invention, the liquid crystal panel 111 and the optical unit 121 are integrally attached and fixed by the film fixer 170 and the metal bar 160 In, by assembling and fastening the metal bar 160 with the side surface 153 of the cover bottom 150 in which the LED assembly 128 and the reflector 125 are accommodated, the liquid crystal panel 111 and the backlight unit 120 are It is integrally modularized through the 150 and the metal bar 160.

Here, the side surface 153 of the cover buttom 150 further includes a bent side portion 155 whose end is bent outward, and the bent portion of the metal bar 160 toward the outside of the bent side portion 155 as shown in FIG. 5A ( In a state in which 163 is in close contact, the bent portion 163 of the metal bar 160 and the bent side portion 155 of the cover bottom 150 may be screw-fastened through a screw 181.

Here, the bent portion 163 of the metal bar 160 is bent at a predetermined angle from the vertical portion 161 toward the side surface 153 of the cover bottom 150, thus, the bent portion ( 163, and further provided with a bent side portion 155 on the side surface 153 of the cover butt 150, so that the metal bar 160 and the cover bottom 150 have the bent portion 163 and the bent side portion 155. By assembling and fastening to each other through the assembly, the fastening portion of the metal bar 160 and the cover bottom 150 can be prevented from protruding to the outside of the liquid crystal panel 111.

Through this, the display device 110 made of an LCD according to an embodiment of the present invention can implement a narrower bezel, and a multi-panel display device ( In the process of implementing 100 of FIG. 1, a non-display area of a multi-panel display device 100 of FIG. 1, which is a bezel area between neighboring display devices 110, may be further minimized.

Through this, it is possible to minimize the occurrence of image disconnection.

Here, the reflective plate 125, which is located covering both the horizontal surface 151 and the side surface 153 of the cover butt 150, extends from the side surface 125b, and covers all the bent side surfaces 155 of the cover butt 150 as well. It is desirable to cover it.

In addition, a separate reflective pad 183 is further provided on the inner side of the vertical portion 161 of the metal bar 160, so that light leaks within the optical gap G between the LED assembly 128 and the optical unit 121. It is desirable to prevent this from occurring.

On the other hand, the buffer pad 185 is further interposed between the bent portion 163 of the metal bar 160 and the bent side portion 155 of the cover bottom 150, so that the metal bar 160 and the cover bottom 150 are more stable. As a result, it can be screwed through the screw 181.

The buffer pad 185 includes a base layer and a cushion foam layer, and the base layer is a polyethylene series containing terephthalic acid having good dimensional stability such as PET (polyethyleneterephthalate). It can be made of.

This base layer has a strong hardness and is not well elongated by force, and thus serves to buffer the deformation of the buffer pad 185.

In addition, the cushion foam layer is made of a poron or urethane material, and serves to absorb shock. This cushion foam layer absorbs a predetermined pressure applied when a predetermined pressure is applied to the buffer pad 185. do. Accordingly, the cushioning pad 185 has a high modulus of elasticity by the cushion foam layer.

Therefore, when such a buffer pad 185 is interposed between the bent portion 163 of the metal bar 160 and the bent side portion 155 of the cover buttum 150, the screw 181 is formed by the buffer pad 185. The fastening force is further improved, and the metal bar 160 and the cover bottom 150 may be screwed more stably through the elastic force of the buffer pad 185.

In addition, as shown in FIG. 5B, the bent portion 163 of the metal bar 160 and the bent side portion 155 of the cover buttum 150 may be assembled and fastened to each other through an adhesive pad 187. The pad 187 may be formed of a foam pad having elasticity, an optical clear adhesive (OCA), or a double side tape.

Through this, the display device 110 made of an LCD according to an embodiment of the present invention can implement a light weight, thin, and narrow bezel even though it does not have a guide panel made of aluminum (Al).

In addition, by placing the film fixer 170 on the rear surface of the optical unit 121, it is possible to prevent the occurrence of sagging of the optical unit 121 even if a separate glass diffusion plate is not provided.

Through this, it is possible to omit the guide panel made of aluminum (Al) and the glass diffusion plate, so that material cost can be reduced, and additional equipment and processes for aligning and fixing the glass diffusion plate can also be omitted. Therefore, the efficiency of the process is also improved.

In addition, the display device 110 made of an LCD according to an embodiment of the present invention can maintain an optical gap or an air gap G between the LED assembly 128 and the optical unit 121. have.

That is, the backlight unit 120 should be formed to have an optical gap or an air gap (hereinafter referred to as an optical gap) G having a predetermined distance between the LED assembly 128 and the optical unit 121. G) is a color mixing space of light emitted from the plurality of LEDs 128a of the LED assembly 128, so that the light emitted from the plurality of LEDs 128a is uniformly mixed in color and incident on the optical unit 121, Or it serves to prevent the occurrence of thermal expansion of the optical unit 121 by the high temperature heat generated from the plurality of LEDs (128a).

Here, in the display device 110 made of an LCD according to an embodiment of the present invention, in a state in which the liquid crystal panel 111 and the optical unit 121 are integrally modularized by the film fixer 170 and the metal bar 160, By allowing the metal bar 160 to be assembled and fastened with the side surface of the cover buttoum 150, an optical gap G may also be formed between the LED assembly 128 and the optical unit 121.

Accordingly, the uniformly colored light passes through the optical unit 121 and is processed into a high-quality surface light source, so that the light is incident on the liquid crystal panel 111.

Here, referring to FIGS. 6A to 6C, a process of modularizing the liquid crystal panel 111 and the backlight unit 120 according to an exemplary embodiment of the present invention will be described in more detail. The liquid crystal panel 111 is positioned above the cover bottom 150 in which the LED assembly 128, the light diffusion lens 129, and the reflector 125 are located, including the LED assembly 128 and the LED 128a.

The liquid crystal panel 111 is attached and fixed to the optical unit 121 through an adhesive pad 118 provided along the rear edge, and a film fixer 170 is attached and fixed to the rear of the optical unit 121 , The liquid crystal panel 111 and the optical unit 121 are integrated with the film fixer 170.

At this time, the vertical portion 161 of the metal bar 160 is attached and fixed to the edge portion 170a of the film fixer 170 exposed along the edge of the optical unit 121.

Next, as shown in FIG. 6B, the integrated liquid crystal panel 111 and the optical unit 120 are positioned adjacent to the top of the cover bottom 150, and then the edge of the film fixer 170 as shown in FIG. 6C. The metal bar 160 attached and fixed to the part 170a is vertically bent downward so that the bent part 163 of the metal bar 160 is in close contact with the outside of the bent side part 155 of the cover buttoum 150 .

Here, by bending the metal bar 160 vertically downward, the optical unit 121 including the film fixer 170 and the liquid crystal panel 110 are supported on the metal bar 160 on the rear edge thereof.

Thereafter, as mentioned above, the bent side portion 155 of the cover butt 150 and the bent portion 163 of the metal portion 160 are screwed through the screw 181 or attached through the adhesive pad 187 And by being fixed, the bent side portion 155 of the cover buttom 150 and the bent portion 163 of the metal portion 160 are assembled and fastened.

Through this, in the display device 110 made of an LCD according to an embodiment of the present invention, the liquid crystal panel 111 and the backlight unit 120 are integrally modularized through the cover bottom 150 and the metal bar 160.

Here, the height h1 formed by the side 153 of the cover butt 150 and the metal bar 160 assembled and fastened with the side 153 of the cover butt 150 is the height h2 of the guide support 127 ) To prevent sagging by supporting the rear surface of the optical unit 121 together with the guide support 127, so that the optical gap G between the LED assembly 128 and the optical unit 121 can be maintained. do.

As described above, in the display device 110 made of an LCD according to an embodiment of the present invention, the liquid crystal panel 111 and the optical unit 121 are integrally attached by the film fixer 170 and the metal bar 160 and In a fixed state, the metal bar 160 is assembled and fastened with the side surface 153 of the cover bottom 150 in which the LED assembly 128 and the reflector 125 are accommodated, so that a guide panel made of aluminum (Al) is not provided. Even though it is not, it is possible to implement a light weight, thin and narrow bezel.

That is, in order to implement a narrow bezel and to stably support the liquid crystal panel even when the case top is removed, a guide panel made of a metal material, that is, aluminum (Al), is used as an essential component. In the display device 110 made of, in a state in which the liquid crystal panel 111 and the optical unit 121 are integrally attached and fixed by the film fixer 170 and the metal bar 160, the metal bar 160 is attached to the LED assembly ( 128) and the reflective plate 125 are assembled and fastened to the side surface 153 of the cover bottom 150 accommodated, so that the liquid crystal panel and the liquid crystal panel have a light weight, thin shape, and a narrow bezel, even though a guide panel made of aluminum (Al) is not provided. The backlight unit can be stably modularized.

In addition, by placing the film fixer 170 on the rear surface of the optical unit 121, it is possible to prevent the occurrence of sagging of the optical unit 121 even if a separate glass diffusion plate is not provided.

Through this, it is possible to omit the guide panel made of aluminum (Al) and the glass diffusion plate, so that material cost can be reduced, and additional equipment and processes for aligning and fixing the glass diffusion plate can also be omitted. Therefore, the efficiency of the process is also improved.

7A to 7B are simulation results obtained by comparing and measuring the luminance distribution of a general LCD and a display device according to an embodiment of the present invention, and FIGS. 8A to 8B are a comparison of a viewing angle distribution between a general LCD and a display device according to an embodiment of the present invention. This is the measured simulation result.

Prior to the description, FIG. 7A is a simulation result of measuring luminance at a specific point of a general LCD, and FIG. 7B illustrates an optical unit (121 in FIG. 6C) and a film fixer (170 in FIG. 6C) according to an embodiment of the present invention. This is a simulation result of measuring the luminance at a specific point of the included display device (110 in FIG. 6C).

7A shows that the luminance of the center point is 706 nits, and there is no significant difference from 708 nits of the center point of FIG. 7B. In addition to the center point, FIGS. 7A and 7B show that there is no significant difference in the amount of luminance distribution.

Through this, although the configuration of the film fixer (170 in FIG. 6C) is further attached and positioned under the optical unit (121 in FIG. 6C), the display device (110 in FIG. 6C) according to the embodiment of the present invention It can be seen that the configuration of 170 of FIG. 6C has no effect on the luminance of the display device 110 of FIG. 6C.

In addition, looking at the viewing angle distribution with reference to FIGS. 8A and 8B, FIG. 8A shows a horizontal half-value angle of 62.5° and a vertical half-value angle of 61.5°, and FIG. 8B shows a horizontal half-value angle of 63.5° and a vertical half-value angle of 60.5°. Also, in the viewing angle, it was confirmed that the general LCD and the display device (110 in FIG. 6c) including the optical unit (121 in FIG. 6c) and the film fixer (170 in FIG. 6c) according to the embodiment of the present invention do not have a significant difference. I can.

That is, even though the structure of the film fixer (170 in Fig. 6c) is further attached and positioned under the optical unit (121 in Fig. 6c) in the display device (110 in Fig. 6c) according to the embodiment of the present invention, the film fixer (Fig. The configuration of 170 in 6c has no effect on the luminance and viewing angle of the display device 110 in FIG. 6C.

Accordingly, although the display device (110 in FIG. 6C) according to an embodiment of the present invention further attaches and positions the configuration of the film fixer (170 in FIG. 6C) under the optical unit (121 in FIG. 6C), the film fixer ( Since 170 in FIG. 6C has no effect on the light efficiency of the display device (110 in FIG. 6C), the metal bar (160 in FIG. 6C) and the cover thickness (150 in FIG. 6C) through the film fixer (170 in FIG. 6C). ) Can be assembled and fastened to each other, so that lightweight, thin, and narrow bezels can be implemented, and the efficiency of the process can also be improved through material cost reduction.

9A to 9B are perspective views schematically showing corners of a cover butt of a display device including an LCD according to an exemplary embodiment of the present invention.

As shown, the cover bottom 150 of the display device (110 in FIG. 6C) made of the LCD according to the embodiment of the present invention is vertically bent along the four edges of the plate-shaped horizontal surface 151 and the horizontal surface 151 It consists of a side surface 153, which is a bar-shaped metal bar 160 is assembled and fastened to the side surfaces 153 of the four edges of the cover buttum 150, respectively.

In this case, as shown in FIG. 9A, in order to improve the efficiency of the formation process, the cover buttoum 150 and the reflective plate 125 have a side surface 153 perpendicular to the horizontal plane 151 and a reflective plate ( The side surface 125b perpendicular from the bottom surface 125a of 125) is further provided with a corner hole 157 at the corner formed by the side surface 151 and the side surface 125b located adjacent to each other. As shown, a curtain tape 190 may be attached to the outside of the side surface 153 of the cover bottom 150 including the corner hole 157 thereof.

Through this, it is possible to prevent light leakage due to the corner hole 157 in the optical gap (G of FIG. 3) between the LED assembly 128 and the optical unit 121.

As described above, in the display device (110 in FIG. 6C) made of an LCD according to an embodiment of the present invention, the liquid crystal panel 111 and the optical unit (121 in FIG. 6C) are provided with a film fixer (170 in FIG. 6C) and a metal bar. In the state of being integrally attached and fixed by 160, the metal bar 160 is assembled with the side 153 of the cover bottom 150 in which the LED assembly (128 in Fig. 6c) and the reflector (125 in Fig. 6c) are accommodated. By being fastened, the liquid crystal panel (111 in FIG. 6C) and the backlight unit (120 in FIG. 6C) can be stably modularized, and light weight, thin, and narrow bezels can be implemented even without having a guide panel made of aluminum (Al). You will be able to.

In addition, since the film fixer (170 in Fig. 6c) that does not affect the light efficiency is located on the rear surface of the optical unit (121 in Fig. 6c), the optical unit (121 in Fig. 6c) is It can prevent sagging, etc. from occurring.

Therefore, it is possible to omit the guide panel made of aluminum (Al) and the glass diffusion plate, so that material cost can be reduced, and additional equipment and processes for aligning and fixing the glass diffusion plate can also be omitted. In addition, the efficiency of the process is also improved.

In this case, the cover bottom 150 may also be referred to as a bottom cover or a bottom cover.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention.

110: display device
111: liquid crystal panels 112, 114: first and second substrates, 119b, 119a: upper and lower polarizing plates)
118: adhesive pad, 120: backlight unit, 121: optical unit
125: reflector (125a: bottom surface, 125b: side surface, 125c: through hole, 125d: light pattern)
127: guide support, 128: LED assembly (128a: LED, 128b: PCB)
129: light diffusion lens
150: cover buttom (151: horizontal plane, 153: side)
160: metal bar (161: vertical portion, 163: bent portion)
170: film fixer (170a: edge)

Claims (11)

A liquid crystal panel, an optical unit attached to a lower portion of the liquid crystal panel, and a fixer attached to a lower portion of the optical unit;
A connecting member attached to an edge of the fixer exposed along an edge of the optical unit;
An LED assembly including a plurality of LEDs, a horizontal surface on which a reflector positioned under the plurality of LEDs is mounted, and a cover bottom including a side surface bent along an edge of the horizontal surface
And the side surface and the connecting member are assembled and fastened to each other.
The method of claim 1,
The connecting member has a bar shape corresponding to one edge of the cover buttum and is overlapped with a double layer or is made of a single layer,
A liquid crystal display device positioned along the four edges of the cover buttum.
The method of claim 1,
The connecting member includes a vertical portion attached to the edge portion, and a bent portion bent at a predetermined angle toward the side from the vertical portion,
The side surface includes a bent side surface portion corresponding to the bent portion, which is bent at a predetermined angle outward from the side surface,
The bent portion and the bent side portion are in close contact with each other to assemble and fasten the liquid crystal display.
The method of claim 3,
The bent portion and the bent side portion are assembled and fastened through a screw or attached to each other through an adhesive pad.
The method of claim 4,
A liquid crystal display device in which a buffer pad is interposed between the bent portion and the bent side portion.
The method of claim 3,
A liquid crystal display device in which a reflective pad is located inside the vertical portion.
The method of claim 3,
The reflector includes a bottom surface corresponding to the horizontal surface and a side surface corresponding to the side surface,
The side surface is extended to cover the bent side surface portion of the liquid crystal display.
The method of claim 7,
A liquid crystal display device having an optical pattern on the side surface.
The method of claim 8,
The light pattern is a liquid crystal display located within the directivity angle of the LED.
The method of claim 1,
The optical unit includes first and second diffusion units and luminance enhancing units,
The first diffusion unit includes a first base layer, a plurality of structures protruding and arranged to protrude from the first base layer at regular intervals, and a lenticular lens positioned in a spaced area between the plurality of structures,
The second diffusion unit includes a second base layer and a light diffusion layer formed of a binder containing beads on an upper portion of the second base layer,
The luminance enhancing part is a dual brightness enhancement film (DBEF).
The method of claim 10,
A first air gap is provided between the lenticular lens and the second diffusion part,
A liquid crystal display device having a second air gap between the light diffusion layer and the luminance enhancing unit.

Images