KR20200058879A - Display device - Google Patents

Abstract

The present invention relates to a display device which improves rigidity and heat dissipation performance while implementing light weight and thinness. A rigid assembly is positioned in an inner surface of a horizontal portion of a back cover to allow a constant force to be applied to four corners of the back cover through the rigid assembly. Accordingly, the rigidity of the back cover can be improved in three rounds to more improve the rigidity of the display device. Therefore, even if an inner plate which is separately provided to improve the rigidity is deleted, the high rigidity can be maintained to implement the light weight and the thinness while the rigidity is excellent, and also improve efficiency of a process through the deletion of the inner plate.

Description

Display device

The present invention relates to a display device having improved rigidity and heat dissipation performance while implementing light weight and thinness.

An organic light emitting diode (OLED) is composed of a hole injection electrode, an organic light emitting layer, and an electron injection electrode, and excitons generated by combining electrons and holes inside the organic light emitting layer fall from the excited state to the ground state. Light emission is made by the energy generated at the time.

With this principle, OLED has a self-luminous property, and unlike a liquid crystal display device, a separate light source is not required, so that thickness and weight can be reduced. In addition, OLEDs are regarded as the next generation display devices for portable electronic devices because they exhibit high quality characteristics such as low power consumption, high luminance, and high reaction speed.

In general, the OLED includes an OLED panel including organic light emitting layers therein, and a back cover coupled to the OLED panel to support the OLED panel.

On the other hand, since these OLEDs have self-luminous properties, when they are driven for a long time, the organic light-emitting layer is deteriorated by heat generated from the organic light-emitting layer itself of the OLED panel, resulting in degeneration and decomposition. Therefore, a variation in luminance between pixels occurs, resulting in deterioration of image quality such as afterimages and deterioration of life. Particularly, as the OLED is enlarged, this deterioration problem becomes more prominent.

In addition, the OLED has fewer components compared to a liquid crystal display device, so that it can be lightweight and thin, but has a problem of low rigidity compared to a liquid crystal display device, which in turn decreases product reliability.

Therefore, in order to solve this problem, the rigidity of the OLED is reinforced between the OLED panel and the back cover, and an inner plate serving as a heat dissipation function is placed. In order to secure sufficient rigidity and heat dissipation of the OLED, the inner plate is thick. It is preferably formed to have.

As such, an OLED including an inner plate made of a thick metal material becomes difficult to realize light weight and thinness that have been recently required.

In addition, the inner plate is an expensive material, and when such an inner plate is used, the process cost is high, so the efficiency of the process is lowered.

The present invention is to solve the above problems, and a first object is to provide a display device with improved rigidity and heat dissipation characteristics.

In addition, a second object is to provide a lightweight and thin display device through the deletion of the inner plate, and a third object is to prevent the efficiency of the process from being reduced by the inner plate.

In order to achieve the object as described above, the present invention is a display panel, a back cover positioned on the rear surface of the display panel, and positioned between the display panel and the back cover, extending to each edge of the back cover And a rigid assembly including a main arm assembly including a main arm, and a sub arm assembly including a plurality of sub arms assembled and fastened with the plurality of main arms, respectively, to a force applied to the sub arm assembly. It provides a display device for applying a constant force to each corner through the reaction force of the main arm assembly.

At this time, the main arm assembly includes a main arm fixing holder including a first plate provided with a protruding protrusion, and the plurality of main arms extending from the main arm fixing holder to each corner, and the sub arm assembly A sub-arm fixing holder including a second plate having a protruding protrusion hole into which the protruding protrusion is inserted, and one end assembled and fastened with the sub-arm fixing hole and the other end respectively assembled and fastened with the plurality of main arms It includes a plurality of sub-arms, the plurality of main arms are located at an angle inclined toward the sub-arm assembly with respect to the first plate, the front toward the sub-arm assembly and the opposite side of the front It is possible to move up and down to the rear, and the plurality of sub-arms can be moved up and down to the rear and the front, with the one end and the other end facing the main arm assembly, respectively.

In addition, the main arms are assembled and fastened through the first plate and the main arm holder, and the main arms can be moved up and down by rotation to the front and the rear of the main arm fixing holder, and the sub One end of the arms is assembled and fastened through the second plate and the first sub-arm holder, the other end of the sub-arms is assembled and fastened through the main arm and the second sub-arm holder, and the sub arms are the first The lifting and lowering is possible by rotation of the front and rear of the first and second sub-arm holders, and the force is applied to the sub-arm assembly so that the main arm assembly and the sub-arm assembly are in close contact with each other. Reaction occurs, and the reaction force corresponds to the constant angle, and the constant angle is defined by the elastic force of the main arm.

In addition, a rigid groove in which the rigid assembly is located is provided on an inner surface of the horizontal portion of the back cover, and the rigid groove is located in the center of the horizontal portion of the back cover, where the main arm fixing holder and the sub arm fixing holder are located. It includes a central portion, and an extension portion extending from the central portion toward each corner, and the main arm and the sub arm positioned respectively.

At this time, stoppers in contact with the ends of the plurality of main arms are provided at the ends of the extensions corresponding to the corners of the back cover, and the depth of the rigid groove corresponds to the thickness of the rigid assembly.

In addition, the back cover is made of aluminum (Al), the display panel and the back cover are attached and fixed to each other through an adhesive pad, and the adhesive pad is made of a thermal interface material (TIM).

In addition, the present invention includes a display panel, a back cover positioned on the rear surface of the display panel, and a rigid assembly positioned between the display panel and the back cover, wherein the rigid assembly extends once to each edge of the back cover. The other end includes a main arm assembly including a plurality of main arms rotatably mounted toward the back cover on a first plate, and the plurality of main arms one end being vertically movable toward the plurality of main arms, respectively And each assembly is assembled and fastened, the other end comprises a sub-arm assembly including a plurality of sub-arms, each of which is vertically movable toward the first plate on the second plate assembled and fastened with the first plate, wherein the The main arm assembly and the sub arm assembly provide a display device in close contact with each other.

Here, the first plate is provided with a protruding protrusion, the second plate is provided with a protruding protrusion groove into which the protruding protrusion is inserted, and the main arm assembly and the sub arm assembly are located on the inner surface of the back cover. A rigid groove is provided, and a stopper in contact with the one end of the plurality of main arms is positioned at the ends of the rigid groove.

As described above, by positioning the rigid assembly on the inner surface of the horizontal portion of the back cover according to the present invention, by applying a constant force to the four corners of the back cover through the rigid assembly, it is possible to further improve the rigidity of the back cover. Therefore, the rigidity of the display device can also be improved.

 Therefore, it is possible to maintain the high rigidity even if the inner plate, which was separately provided for improving the rigidity, is removed, and thus has an effect of realizing light weight and thinness while having excellent rigidity, and also improving the efficiency of the process through the deletion of the inner plate. There is.

1A is an exploded perspective view schematically showing a display device according to an exemplary embodiment of the present invention.
1B is a cross-sectional view schematically showing a part of the modular display of FIG. 1A.
1C is an enlarged view showing an area A of FIG. 1B enlarged.
Figure 2a is a perspective view schematically showing the inner surface of the horizontal portion of the back cover according to an embodiment of the present invention.
2B is an enlarged cross-sectional view of region B of FIG. 2A.
Figure 3a is a perspective view schematically showing a rigid assembly according to an embodiment of the present invention.
Figure 3b is a perspective view schematically showing the appearance of the fully assembled rigid assembly.
4A to 4B are enlarged views showing an area C of FIG. 3A.
5A to 5B are enlarged views showing a region D of FIG. 3A.
6A to 6B are enlarged views showing an area F of FIG. 3A.
Figure 7 is a front view schematically showing the inner surface of the horizontal portion of the back cover provided with a rigid assembly.
8A to 8B are cross-sectional views schematically showing a state in which a force is applied by the main arm.

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

1A is an exploded perspective view schematically showing a display device according to an exemplary embodiment of the present invention, FIG. 1B is a cross-sectional view schematically showing a part of the modular display device of FIG. 1A, and FIG. 1C is an area A of FIG. 1B. It is an enlarged view showing an enlarged view.

As illustrated, the display device 100 includes a display panel 110 for largely implementing an image and a back cover 140 for supporting the display panel 110.

Here, if the direction on the drawing is defined for convenience of description, the back cover 140 is positioned behind the display panel 110 on the premise that the display surface of the display panel 110 faces forward.

At this time, although not shown, a cover window (not shown) for protecting the display panel 110 may be further positioned on the front surface of the display panel 110.

Here, the display panel 110 for realizing an image includes a liquid crystal display device (LCD), a plasma display panel device (PDP), a field emission display device (FED), and electricity. The display device 100 according to an exemplary embodiment of the present invention may be displayed as the next generation display on the display panel 110. The OLED panel, which has been spotlighted as a device, will be described as an example.

Since the OLED panel is a self-luminous device, it does not require a backlight used for a liquid crystal display device, which is a non-luminous device, so it can be made thinner and lighter. It has a better viewing angle and contrast ratio than a liquid crystal display device, and is advantageous in terms of power consumption. It is possible to drive low voltage, has a fast response speed, and is resistant to external shocks because its internal components are solid, and has a wide range of operating temperatures.

In particular, because the manufacturing process is simple, there is an advantage that can reduce the production cost more than the existing liquid crystal display device.

In such an OLED panel, a substrate on which a driving thin film transistor and a light emitting diode are formed is encapsulated by an encapsulation substrate.

Prior to a closer look, the OLED panel, which is the display panel 110 according to the embodiment of the present invention, is divided into an upper emission type (top emission type) and a lower emission type (bottom emission type) according to the transmission direction of the emitted light. Hereinafter, in the present invention, the lower emission method will be described as an example.

In addition, for convenience of description, each pixel area P is provided with a light emitting diode E and is located along the edge of the light emitting area EA in which an image is substantially realized and the light emitting area EA, and the driving thin film transistor DTr It is defined as a non-emission area (NEA) including a switching area (TrA) is formed.

The semiconductor layer 113 is positioned on the switching region TrA positioned in the non-emission region NEA of each pixel region P on the substrate 101 of the OLED panel. The semiconductor layer 113 is made of silicon. The central portion is composed of active regions 113a constituting a channel and source and drain regions 113b and 113c doped with impurities at a high concentration on both sides of the active region 113a.

The gate insulating layer 115 is positioned on the semiconductor layer 113, and the gate electrode 117 and the drawing are not shown in the drawing in correspondence with the active region 113a of the semiconductor layer 113 on the gate insulating layer 115. The gate wiring (not shown) is provided.

In addition, the first interlayer insulating layer 116a is positioned on the upper portion including the gate electrode 117 and the gate wiring (not shown), wherein the first interlayer insulating layer 116a and the lower gate insulating layer 115 are active regions. (113a) First and second semiconductor layer contact holes 119 are provided to expose the source and drain regions 113b and 113c located on both sides, respectively.

Next, the source and drain regions 113b spaced apart from each other and exposed through the first and second semiconductor layer contact holes 119 above the first interlayer insulating layer 116a including the first and second semiconductor layer contact holes 119 , 113c) and source and drain electrodes 118a and 118b, respectively.

In addition, the second interlayer insulating film 116b is positioned on the first interlayer insulating film 116a exposed between the source and drain electrodes 118a, 118b and the two electrodes 118a, 118b.

At this time, the semiconductor layer 113 including the source and drain electrodes 118a and 118b and the source and drain regions 113b and 113c contacting these electrodes 118a and 118b and a gate located on the semiconductor layer 113 The insulating layer 115 and the gate electrode 117 form a driving thin film transistor DTr.

On the other hand, although not shown in the drawing, a data line (not shown) defining each pixel area P crossing a gate line (not shown) is located, and a switching thin film transistor (not shown) is a driving thin film transistor DTr. With the same structure as, it is connected to the driving thin film transistor (DTr).

Here, the switching thin film transistor (not shown) and the driving thin film transistor (DTr) are amorphous silicon thin film transistors (a-Si TFT), polycrystalline silicon thin film transistors (p-Si TFT), and single crystal silicon according to the type of the semiconductor layer 113. It can be divided into a thin film transistor (c-Si TFT) and an oxide thin film transistor (oxide TFT), and in the drawing, the semiconductor layer 113 shows a top gate type as an example. It may also be provided in a bottom gate type made of amorphous silicon of impurities.

In addition, the wavelength conversion layer 121 is positioned on the second interlayer insulating layer 116b corresponding to the light emitting region EA of each pixel region P.

The wavelength conversion layer 121 includes a color filter that transmits only the wavelength of the color set in the pixel region P among the white light emitted from the light emitting diode E toward the substrate 111.

Here, the wavelength conversion layer 121 may transmit only red, green, or blue wavelengths. For example, in the display panel 110 of the OLED panel according to an embodiment of the present invention, one unit pixel may be formed of adjacent red, green, and blue pixel areas P, in this case provided in the red pixel area The wavelength conversion layer 121 may include a red color filter, the wavelength conversion layer 121 provided in the green pixel area may include a green color filter, and the wavelength conversion layer 121 provided in the blue pixel area may include a blue color filter, respectively.

Additionally, in the OLED panel according to an embodiment of the present invention, one unit pixel may further include a white pixel region in which the wavelength conversion layer 121 is not formed.

In addition, the wavelength conversion layer 121 according to another example may include quantum dots having a size to emit light of a color set in each pixel area P by re-emitting according to white light emitted from the light emitting diode E. Here, the quantum dots are CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZn, CdZn, CdZn, CdZn CdHgTe, HgZnS, HgZnSe, HgZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, InP, GaA, Al, GaN, GaP It may include at least one selected from the group consisting of AlNP, AlNAs, AlPAs, InNP, InNAs, InPAs, GaAlNP, GaAlNAs, GaAlPAs, GaInNP, GaInNAs, GaInPAs, InAlNP, InAlNAs, InAlPAs, and SbTe, but is not limited thereto. .

For example, the wavelength conversion layer 121 of the red pixel region is CdSe or InP quantum dots, the wavelength conversion layer 121 of the green pixel region is CdZnSeS, and the wavelength conversion layer 121 of the blue pixel region is ZnSe. Each may include a quantum dot. As described above, the OLED panel in which the wavelength conversion layer 121 includes quantum dots may have a high color gamut.

The wavelength conversion layer 121 according to another example may be formed of a color filter containing quantum dots.

In another example, the wavelength conversion layer 121 may be omitted, and red light, green light, and blue light may be directly emitted for each pixel area P from the light emitting diode E.

The overcoat layer 116c having the drain contact hole PH exposing the drain electrode 118b together with the second interlayer insulating layer 116b is positioned on the wavelength shifting layer 121, and the overcoat layer 116c is placed on the upper side. Is connected to the drain electrode 118b of the driving thin film transistor DTr, and for example, a first electrode 123 forming an anode of the light emitting diode E is positioned with a material having a relatively high work function value.

The first electrode 123 is a metal oxide such as indium tin oxide (ITO) or indium zinc oxide (IZO), a metal oxide such as ZnO: Al or SnO ₂ : Sb , Poly (3-methylthiophene), poly [3,4- (ethylene-1,2-dioxy) thiophene] (PEDT), polypyrrole and conductive polymers such as polyaniline. In addition, it may be made of carbon nanotubes (CNT), graphene, silver nanowires, and the like.

The first electrode 123 is positioned for each pixel area P, and a bank 126 is positioned between the first electrodes 123 positioned for each pixel area P. That is, the first electrode 123 has a structure that is separated for each pixel region P by using the bank 126 as a boundary for each pixel region P.

In addition, the organic light emitting layer 125 is positioned on the first electrode 123, and the organic light emitting layer 125 may be formed of a single layer made of a light emitting material, and a hole injection layer is used to increase light emission efficiency. , A hole transport layer, an emitting material layer, an electron transport layer, and an electron injection layer.

A second electrode 127 forming a cathode is positioned on the front side of the organic emission layer 125.

Here, the organic emission layer 125 may be formed of a common layer commonly formed in the pixel regions P, and may be a white emission layer emitting white light.

Alternatively, the organic emission layer 125 may be separated for each pixel region P and may be made of different materials. In this case, when the organic light emitting layer 125 is formed separately for each pixel area P, each organic light emitting layer 125 may be formed to have a different thickness for each pixel area P.

In addition, the second electrode 127 may be made of a material having a relatively small work function value. At this time, the second electrode 127 has a double-layer structure, and a single layer of an alloy composed of a first metal made of Ag, a metal material having a low work function, and a second metal made of Mg or the like in a certain ratio, or multiple layers thereof. Can be configured.

The second electrode 127 may be formed of a common layer commonly formed in the pixel areas P.

At this time, the first electrode 123, the organic light emitting layer 125, and the second electrode 127 form a light emitting diode E.

When the predetermined voltages are applied to the first electrode 123 and the second electrode 127 according to the selected signal, the display panel 110 is supplied from the holes injected from the first electrode 123 and the second electrode 127. The provided electrons are transported to the organic light emitting layer 125 to form excitons, and when these excitons transition from an excited state to a ground state, light is generated and emitted in the form of visible light.

In this case, since the emitted light passes through the transparent first electrode 123 and goes out, the display panel 110 implements an arbitrary image.

And, after placing the thin film layer-shaped encap substrate 112 on top of the driving thin film transistor DTr and the light emitting diode E, it is transparent between the light emitting diode E and the encap substrate 112 and has adhesive properties. By bonding the encapsulation substrate 112 and the substrate 111 via a face seal 114 made of an organic or inorganic insulating material, the display panel 110 is encapsulated.

In addition, the display device 100 according to an exemplary embodiment of the present invention is a polarizing plate 130 for preventing a decrease in contrast due to external light to the outer surface of the substrate 111 through which the light of the display panel 110 made of an OLED panel is transmitted. ), That is, when the OLED panel is in the driving mode for realizing an image, by placing the polarizing plate 130 that blocks external light incident from the outside in the transmission direction of the light emitted through the organic light emitting layer 125, contrast is achieved. To improve.

As described above, the back cover 140 is positioned on the rear surface of the display panel 110 to which the polarizing plate 130 is attached, and more precisely, on the outer surface of the encap substrate 112, so that the display panel 110 is attached to the back cover 140. Is supported by. The back cover 140 includes a plate-shaped horizontal portion 141 and an inner hemmed hemming portion 143 facing the inner surface of the horizontal portion 141 from the edge of the horizontal portion 141. Includes.

Here, the hemming portion 143 of the back cover 140 improves the rigidity of the back cover 140.

That is, the back cover 140 of the display device 100 according to an exemplary embodiment of the present invention is made of a metal material having a thin thickness of about 0.3 to 0.5 T. Even if the back cover 140 is thinly formed, the edge By the hemming portion 143 formed accordingly, the rigidity, in particular the bending rigidity, can be improved. Accordingly, the intensity of the entire display device 100 may be increased, or the thickness of the back cover 140 may be reduced under the same intensity condition.

The display panel 110 is attached and fixed to the inner surface of the horizontal portion 141 of the back cover 140 through the adhesive pad 150.

At this time, the back cover 140 is made of a metal material of at least one of copper (Cu), silver (Ag), aluminum (Al), iron (Fe), nickel (Ni), and tungsten (W), or at least It may be composed of an alloy material containing one or more, or the outer surface of nickel (Ni), silver (Ag), gold (Au) at least any one of the metal material, or an alloy material containing at least one of them is plated It might be.

At this time, when the back cover 140 is made of aluminum (Al) having excellent thermal conductivity, the back cover 140 is preferably formed of aluminum (Al) having a purity of 99.5%, and also anodizing treatment. Through, it is preferable that a black oxide film is formed on the surface. The anodized back cover 140 has a black color, and thus the heat absorption rate increases, and accordingly, the back cover 140 has a higher thermal conductivity characteristic.

Therefore, the back cover 140 serves to effectively discharge high temperature heat generated from the display panel 110 to the outside.

At this time, the adhesive pad 150 for attaching the display panel 110 to the horizontal portion 141 of the back cover 140 may be made of a flexible material, for example, a TIM (thermal interface material). As a material with excellent properties, a silicon-based material may be included.

By attaching the display panel 110 made of the OLED panel to the horizontal portion 141 of the back cover 140 using the adhesive pad 150 made of TIM, the high temperature heat generated from the display panel 110 is externally applied. It can be made to radiate heat more effectively.

Here, the adhesive pad 150 may be positioned to completely cover the rear surface of the display panel 110 and may be positioned only along the rear edge of the display panel 110.

Here, even though the back cover 140 is made of a thin metal material, the display device 100 according to an embodiment of the present invention is more rigid even if a separate inner plate is not provided between the display panel 110 and the back cover 140. This will be improved, because a separate rigid assembly 200 (see FIG. 3A) is further positioned on the back cover 140.

Through this, the display device 100 according to an exemplary embodiment of the present invention has excellent heat dissipation characteristics, and can realize light weight and thinness, and also improves rigidity.

In addition, the efficiency of the process is also improved by eliminating the inner plate.

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

Figure 2a is a perspective view schematically showing the inner surface of the horizontal portion of the back cover according to an embodiment of the present invention, Figure 2b is a cross-sectional view showing an enlarged area B of Figure 2a.

As shown, the back cover 140 has a plate shape, an inner hemming portion (inner hemming) so as to face the inner surface of the horizontal portion 141 from the edge of the horizontal portion 141 and the horizontal portion 141 143).

At this time, the inner surface of the horizontal portion 141 is provided with a rigid groove 210 in which the rigid assembly (200, see Fig. 3a) is located, the rigid groove 210 is formed in the center of the back cover 140, rigid Four corners of the back cover 140 with respect to the central portion 210a where the main arm fixing holder 225 (see FIG. 3A) and the sub arm fixing holder 245 (see FIG. 3A) are located in the assembly 200 (see FIG. 3A). It includes an extension portion (210b) that extends toward each.

The main arms 231 and 3A of the rigid assembly 200 (refer to FIG. 3A) and the sub-arms 251 and 3A are positioned at each of the extension parts 210b.

At this time, as shown in FIG. 2B, a stopper 213 is provided at an end of each extension portion 210b. The stopper 213 is a stopper portion 213b inserted into the end of the extension portion 210b, and a stopper Includes a stopper guide (213a) covering the upper portion of the portion (213b).

Although the back cover 140 is made of a thin thickness of about 0.3 to 0.5T, the rigidity is partially improved by the inner hemming portion 143 formed along the edge, and also the inner surface of the horizontal portion 141 of the back cover 140 Since the rigid assembly 200 (see FIG. 3A) is further positioned in the rigid groove 210 formed in the stiffness of the back cover 140, the rigidity of the back cover 140 is further improved.

The display device including the back cover 140 (100 in FIG. 1C) may maintain excellent rigidity without a separate inner plate, and may also implement light weight and thinness by removing the inner plate.

In addition, the efficiency of the process is also improved by eliminating the inner plate.

Here, the rigid assembly (200, see FIG. 3A) located in the rigid groove 210 formed on the inner surface of the horizontal portion 141 of the back cover 140 will be described in more detail with reference to the drawings below.

Figure 3a is a perspective view schematically showing a rigid assembly according to an embodiment of the present invention, Figure 3b is a perspective view schematically showing the appearance of the rigid assembly unfolded.

And, Figures 4a ~ 4b is a perspective view schematically showing the main arm holder and the main arm holder of the rigid assembly, an enlarged view showing an enlarged area C of Figure 3a, Figure 5a ~ 5b is a sub-arm holder of the rigid assembly 3A is an enlarged view illustrating an area D of FIG. 3A, and FIGS. 6A to 6B are perspective views schematically showing a connection portion between the main arm and the sub arm of the rigid assembly, and the area F of FIG. 3A It is an enlarged view showing enlarged.

And Figure 7 is a front view schematically showing the inner surface of the horizontal portion of the back cover provided with a rigid assembly, Figure 8a ~ 8b is a cross-sectional view schematically showing a state in which the force is applied by the main arm.

As shown in FIG. 3A, the rigid assembly 200 largely includes a main arm assembly 230 and a sub-arm assembly 240. The main arm assembly 230 includes a main arm fixing holder 225 and a main arm. It consists of four main arms 231 fixed to the fixed holder 225 through the main arm holder 233.

Looking at the configuration in more detail with reference to Figures 4a to 4b, the main arm fixing holder 225 includes a first plate 221 and a protrusion 223 protruding upward from the first plate 221, the first The plate 221 is provided with a pair of first fixing holders 227a and 227b, respectively, in all directions.

A pair of first fixing holes 227a and 227b is provided with a first fixing hole 229, respectively, and a pair of first fixing to the main arm holder 233 provided at one end of the four main arms 231, respectively. The first fixing protrusions 235 which are inserted into the first fixing holes 229 of the holders 227a and 227b, respectively, are protruded, and the main arm 231 has first ends of the first fixing protrusions of the main arm holder 233 ( 235) is inserted into and fixed to the first fixing holes 229 of the first fixing holders 227a and 227b, respectively.

At this time, the four main arms 231 are inclined at a certain angle (Θ) in all directions from the bottom surface of the rigid groove (210 in FIG. 2B) of the back cover (140 in FIG. 2B) in which the first plate 221 is located. It is provided, both the first fixing hole 229 and the first fixing protrusion 235 are circular, so that the first fixing protrusion 235 can be rotated up and down while being inserted into the first fixing hole 229. It is mounted.

Accordingly, the main arms 231 respectively mounted in all directions of the main arm fixing holder 225 may move up and down in the + Z axis and -Z axis directions defined in the drawing through the main arm holder 233.

The main arm assembly 230 is such that the main arm fixing holder 225 is located in the center of the inner surface of the horizontal portion 141 of the back cover 140, and the main arms mounted in four directions in the main arm fixing holder 225, respectively 231) is made of a length extending from the main arm fixing holder 225 to the four corners of the back cover 140, respectively.

5A to 5B, the sub-arm assembly 240 has one end fixed to the sub-arm fixing holder 245 and the sub-arm fixing holder 245 through the first sub-arm holder 253, and the other end It is composed of four sub-arms 251 fixed to the main arm 231 of the main arm assembly 230 through the second sub-arm holder 257.

Here, the sub-arm fixing holder 245 includes a pair of second fixing holders 247a and 247b respectively provided in all directions of the second plate 241 and the second plate 241, and the sub-arm fixing holder 245 ), The second plate 241 is provided with a protruding protrusion 243 into which the protruding protrusion 223 provided in the first plate 221 of the main arm fixing holder 230 is inserted.

In addition, a pair of second fixing holes 247a and 247b is provided with a second fixing hole 249, respectively, and a pair of first sub-arm holders 253 provided at one end of the four sub-arms 251, respectively. The second fixing protrusions 255 are inserted into the second fixing holes 249 of the second fixing holders 247a and 247b, respectively.

Accordingly, the four sub-arms 251 have one end fitted with the second fixing protrusions 255 of the first sub-arm holder 253, respectively, into the second fixing holes 249 of the second fixing holders 247a, 247b. It is inserted and fixed.

Since the second fixing hole 249 and the second fixing protrusion 255 are both circular, the second fixing protrusion 255 is rotatably mounted up and down while being inserted into the second fixing hole 249, The sub-arms 251 respectively mounted in all directions of the sub-arm fixing holders 245 may also move up and down in the + Z axis and -Z axis directions defined in the drawing through the first sub-arm holder 253.

The sub-arm 251 of the sub-arm assembly 240 and the main arm 231 of the main arm assembly 230 are fixed and mounted to each other, for this purpose, as shown in FIGS. 6A to 6B, The second sub-arm holder 257 provided at the other end is provided with a pair of third fixed holders 259a and 259b, and the pair of third fixed holders 259a and 259b has a third fixed hole 258, respectively. It is.

In addition, a protruding holder 237 is provided in each main arm 231 of the main arm assembly 230, and each of the third fixing holes 258 of the pair of third fixing holders 259a and 259b is provided in the protruding holder 237. ) Is provided with a third fixing protrusion 239 is inserted into the protrusion, the four sub-arms 251, each other end is the main arm (359a, 259b) in the third fixing hole (259a, 259b) of the second sub-arm holder 257 The third fixing protrusion 239 provided in the protruding holder 237 of the 231 is inserted and fixed.

At this time, the protruding holder 237 has a circular cross section parallel to the longitudinal direction of the main arm 231, and the third fixing protrusion 239 provided protruding in the protruding holder 237 is also formed in a circular shape, the second sub The arm holder 257 is assembled with and fastened to each other as the third fixing protrusions 239 are fitted into the protruding holder 237 and the third fixing holes 259a and 259b, and the + Z axis defined in the drawing is -It can be moved up and down in the Z-axis direction.

The rigid assembly 200 is applied to the first plate 221 of the main arm assembly 230 by applying a force from the front of the sub-arm assembly 240 toward the main arm assembly 230, as shown in Figure 2b. The protruding protrusions 243 provided in the second plate 241 of the sub-arm assembly 240 are inserted into the protruding protrusions 223 to be in close contact with each other.

Here, in the process where the sub-arm assembly 240 and the main arm assembly 230 are in close contact with each other, the sub-arms 251 of the sub-arm assembly 240 by the force applied to the sub-arm assembly 240 are sub-arm assemblies The first sub-arm holder 253 of 240 rotates toward the + Z axis defined in the drawing, and the second sub-arm holder 257 rotates toward the -Z axis defined in the drawing, so that each sub arm (251) is to apply a force to each of the main arm (231).

Therefore, the main arm 231 of the main arm assembly 230 is the bottom of the rigid groove (210b in FIG. 2B) of the back cover 140 by rotation of the first fixing protrusion 235 and the first fixing hole 229. The surface, that is, descending toward the -Z axis defined in the drawing, is completely unfolded to be in close contact with the bottom surface of the rigid groove (210b in FIG. 2B) of the back cover 140.

At the same time, the sub-arm assembly 240 and the main arm assembly 230 are in close contact with each other.

Here, in a state where the main arms 231 are unfolded in a predetermined angle (Θ) with the bottom surface of the rigid groove (210b in FIG. 2B) of the back cover 140 in all directions, force is applied through the sub-arm assembly 240. As it is fully unfolded to be in close contact with the bottom surface of the rigid groove of the back cover 140 (210b of FIG. 2B), the main arms 231 are provided in the main arms 231 of the rigid groove of the back cover 140 (FIG. 2B) A reaction force corresponding to a certain angle Θ formed with the bottom surface of 210b) is generated.

This reaction force is generated between the sub-arm assembly 240 and the main arm assembly 230, and applies a constant force (F) to the other end of each main arm 231, that is, the end through the elastic force of the main arm 231 do.

At this time, the main arm 231 of the main arm assembly 230 is connected to the sub arm 251 and the main arm 231 in a process in close contact with the bottom surface of the rigid groove (210b in FIG. 2B) of the back cover 140 The force applied to the region (F region) can also be distributed by an elastic force, so that even if the main arm assembly 230 and the sub arm assembly 240 are in close contact with each other, the second sub arm holder 257 and the protruding holder 237 The connecting portions (F region) of the main arm 231 and the sub arm 251 fixed by being assembled and fastened to each other are not damaged, and a constant force is applied to the ends of the main arms 231.

Therefore, as shown in FIG. 7, when the rigid assembly 200 is positioned in the rigid groove 210 formed on the inner surface of the horizontal portion 141 of the back cover 140, the main arm assembly 230 and the sub arm As the assembly 240 is in close contact with each other, a constant force F applied to the ends of the main arms 231 of the main arm assembly 230 is transmitted to each corner of the display device (100 in FIG. 1C).

8A and 8B, the main arm 251 located in the extension portion 210b of the rigid groove 210 is shown by the sub arms 231, as shown in FIG. 8A. In the process of spreading to be in close contact with the bottom surface of the rigid groove (140b in FIG. 2b) of the back cover (140 in FIG. 2b) by the applied force, the main arms 231 are shown in FIG. 8b by the elastic force of the main arms 231. As shown, the stopper portion 213b of the stopper 213 is pushed.

Accordingly, a length difference L overlapping the main arm 231 and the stopper portion 213b is caused, and the length difference L between the main arm 231 and the stopper portion 213b thus generated is generated. Force (F) is to be transmitted to each corner of the back cover 140.

The force transmitted to each corner of the back cover 140 tensions the back cover 140 tightly, thereby improving the rigidity of the back cover 140.

Accordingly, the stiffness of the display device (100 of FIG. 1C) including the back cover 140 is improved.

That is, the display device according to an embodiment of the present invention (100 in FIG. 1C) is positioned on the inner surface of the horizontal portion 141 of the back cover 140, thereby corresponding to the rigidity of the rigid assembly 200. The stiffness is improved as much as possible, and the stiffness as much as corresponding to the elastic force of the main arm 231 of the stiffness assembly 200 can be further improved to further improve the stiffness of the display device (100 in FIG. 1C). It is possible.

Accordingly, damage to the display panel (100 of FIG. 1C) of the display device (100 of FIG. 1C) can be prevented from occurring, for example, the display device (100 of FIG. 1C) is a display panel (110 of FIG. 1C). As the and the back cover 140 are attached to each other through the adhesive pad (150 in FIG. 1C), the thermal expansion coefficient is concave based on the front where the small display panel (110 in FIG. 1C) is located compared to the back cover 140. When bending deformation of the display device (100 in FIG. 1C) occurs, a peeling phenomenon of the display panel (110 in FIG. 1C) and the back cover 140 occurs, and thus the display panel (FIG. 1c of 110) may be damaged.

At this time, since the display device (100 in FIG. 1C) according to an embodiment of the present invention applies a constant force F to four corners of the back cover 140 through the rigid assembly 200, the rigidity of the back cover 140 Can improve the overall rigidity of the display device (100 in FIG. 1C).

Therefore, it is possible to prevent the warping deformation of the display device (100 of FIG. 1C), so that the display panel (110 of FIG. 1C) is damaged by the warping deformation of the display device (100 of FIG. 1C). It can be prevented.

Here, the rigidity of the rigid assembly 200 including each of the main arm 231 and the sub-arms 251 is preferably formed to be similar to the rigidity of the display device (100 of FIG. 1C), the rigid assembly 200 When the stiffness of the stiffness assembly 200 is smaller than that of the display device (100 in FIG. 1C), the stiffness together with the display device (100 in FIG. 1C) The assembly 200 may be deformed.

In addition, the main arms 231 are metals, polymers having a certain stiffness and a certain elasticity, while having a certain stiffness so as to have an elastic force corresponding to a certain angle formed with the bottom surface of the rigid groove 210b of the back cover 140, It may be made of a polymer composite material, but is not limited thereto.

On the other hand, the sub-arm assembly 240, in addition to the role of improving the overall rigidity of the rigid assembly 200 while applying a constant force to the main arm assembly 230, the main arm assembly 230 is defined in the opposite direction, that is, in the drawing -A constant force is applied so that the main arm assembly 230 is in close contact with the horizontal portion 141 of the back cover 140 so as not to be inclined at a certain angle along the Z axis.

In addition, the rigid assembly 200 is formed to have a thickness that does not protrude out of the rigid groove 210 provided in the back cover 140, so that the adhesive pad (Fig. 1) inside the horizontal portion 141 of the back cover 140 It is preferable that separate interference does not occur between the display panel (110 in FIG. 1C) and the rigid assembly 200 attached and fixed through 150 of 1c).

Accordingly, in consideration of this, it is possible to design the length and elastic force of the main arm 231 and the position of the connecting portion (F region) of the main arm 231 and the sub arm 251.

As described above, the display device according to an embodiment of the present invention (100 in FIG. 1C) forms a hemming portion (143 in FIG. 2A) along the edge of the back cover 140 having a thin thickness, and is made of TIM. By attaching the display panel (110 in FIG. 1C) to the horizontal portion 141 of the back cover 140 using a pad (150 in FIG. 1C), the rigidity of the back cover 140 can be primarily improved while displaying. The high-temperature heat generated from the panel (110 in FIG. 1C) can also be made to radiate more effectively to the outside.

In particular, the display device according to an embodiment of the present invention (100 in FIG. 1C) corresponds to the rigidity of the rigid assembly 200 by placing the rigid assembly 200 on the inner surface of the horizontal portion 141 of the back cover 140 While being able to secondaryly improve the stiffness of the back cover 140 as much as possible, it is also possible to apply a constant force to the four corners of the back cover 140 by the rigid assembly 200, so the back cover 140 The stiffness of can be improved over the third order.

As described above, as the stiffness of the back cover 140 is improved, the stiffness of the display device (100 of FIG. 1C) can also be improved.

 Therefore, the display device according to an embodiment of the present invention (100 in FIG. 1C) can maintain high rigidity even if the inner plate was separately provided to improve rigidity, and thus can provide excellent rigidity and light weight and thinness. The efficiency of the process through plate removal can also be improved.

The present invention is not limited to the above-described embodiments, and can be implemented by variously changing within the limits without departing from the spirit of the present invention.

140: back cover (141: horizontal part)
200: rigid assembly
210: Rigid groove (210a: central part, 210 ㅠ: extended part)
213: stopper
230: main arm assembly (231: main arm)
240: sub-arm assembly (251: sub-arm)

Claims (14)

A display panel;
A back cover located on the rear surface of the display panel;
It is located between the display panel and the back cover, and includes a main arm assembly including a plurality of main arms extending to each edge of the back cover, and a plurality of sub arms each assembled and fastened with the plurality of main arms. Rigid assembly including the sub-arm assembly
And a display device that applies a constant force to each corner through a reaction force of the main arm assembly by a force applied to the sub-arm assembly.
According to claim 1,
The main arm assembly includes a main arm fixing holder including a first plate provided with a protrusion, and the plurality of main arms extending from the main arm fixing holder to each corner,
The sub-arm assembly is assembled with a sub-arm fixing holder including a second plate provided with a protruding protrusion hole into which the protruding protrusion is inserted, one end assembled with the sub-arm fixing hole and the plurality of main arms, and A display device comprising the plurality of sub-arms including the other end to be fastened.
According to claim 2,
One end of the plurality of main arms is positioned at an inclined angle toward the sub-arm assembly with respect to the first plate, and can be moved up and down to the front toward the sub-arm assembly and to the rear opposite to the front,
The plurality of sub-arms, one end and the other end of the display device capable of moving up and down to the rear and the front, respectively toward the main arm assembly.
The method of claim 3,
The main arms are assembled and fastened through the first plate and the main arm holder, and the main arms are movable up and down by rotation of the main arm fixing holder to the front and the rear,
One end of the sub arms is assembled and fastened through the second plate and the first sub arm holder, and the other end of the sub arms is assembled and fastened through the main arms and the second sub arm holder,
The sub-arms are display devices capable of moving up and down by rotating the first and second sub-arm holders to the front and the rear.
The method of claim 3,
The reaction force is generated by the force applied to the sub-arm assembly so that the main arm assembly and the sub-arm assembly are in close contact with each other,
The reaction force corresponds to the constant angle, the constant angle is a display device defined by the elastic force of the main arm.
According to claim 1,
A display device having a rigid groove in which the rigid assembly is located on an inner surface of the horizontal portion of the back cover.
The method of claim 6,
The rigid groove is located in the center of the horizontal portion of the back cover and extends toward each corner from the central portion where the main arm fixing holder and the sub arm fixing holder are located, and the main arm and the sub arm A display device including extension portions respectively positioned.
The method of claim 7,
A display device having stoppers in contact with the ends of the plurality of main arms at ends of the extensions corresponding to the corners of the back cover.
The method of claim 6,
The depth of the rigid groove is a display device corresponding to the thickness of the rigid assembly.
According to claim 1,
The back cover is a display device made of aluminum (Al).
According to claim 1,
The display panel and the back cover are attached and fixed to each other through an adhesive pad,
The adhesive pad is a display device made of a thermal interface material (TIM).
A display panel;
A back cover located on the rear surface of the display panel;
Rigid assembly located between the display panel and the back cover
It includes,
The rigid assembly has a main arm assembly, one end of which extends to each corner of the back cover, and the other end of the main plate includes a plurality of main arms which are mounted on the first plate so as to be raised and lowered toward the back cover;
One end is assembled and fastened with the plurality of main arms, respectively, so that the plurality of main arms can be raised and lowered respectively, and the other end is respectively raised and lowered toward the first plate on a second plate assembled and fastened with the first plate. A display device including a sub-arm assembly including a plurality of sub-arms that are mounted as possible, wherein the main arm assembly and the sub-arm assembly are positioned in close contact with each other.
The method of claim 12,
The first plate is provided with a protrusion, and the second plate is a display device having a protrusion protrusion groove into which the protrusion is inserted.
The method of claim 11,
A display device on the inner surface of the back cover is provided with a rigid groove in which the main arm assembly and the sub arm assembly are located, and a stopper in contact with the one end of the plurality of main arms is located at an end of the rigid groove.

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