KR20200040492A - Display device - Google Patents

Abstract

The present invention relates to a display device having improved rigidity and heat dissipation performance while being made lighter and thinner. According to the present invention, a back cover having excellent thermal conductivity is attached to a rear surface of the display panel with an adhesive pad having excellent heat transfer characteristics, thereby providing excellent heat dissipation, and positioning a rigid assembly including a pair of elastic bars on the back of the back cover to more improve the rigidity of the display device. Accordingly, even if the inner plate, which is additionally provided to improve rigidity, is removed, certain rigidity is maintained. Therefore, the display device has improved rigidity while being made lighter and thinner, and process efficiency is improved by removing the inner plate.

Description

Display device

The present invention relates to a display device having improved stiffness 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, an 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 due to heat generated from the organic light-emitting layer itself of the OLED panel, thereby degeneration and decomposition. Therefore, a variation in luminance between pixels occurs, resulting in deterioration of image quality and lifespan such as afterimages. Particularly, as the OLED becomes larger, this deterioration problem becomes more prominent.

In addition, the OLED has fewer components compared to a liquid crystal display device, so that it is 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, and located on the back of the display panel, located at both ends in the longitudinal direction of the display panel, each having a curvature convexly curved in a direction facing each other. A display device including a rigid assembly including first and second elastic bars is provided.

At this time, the curvature radius of the first and second elastic bars and the rigidity of the display panel are inversely proportional to each other.

Here, the first and second elastic bars are connected to each other through a center bar fixed to the center, respectively, and the center bar is provided with a length adjusting unit for changing the radius of curvature of the first and second elastic bars, wherein The first elastic bar is located at the first edge of the display panel, and both ends of the first elastic bar are fixed adjacent to the third and fourth edges perpendicular to the first edge, and the second elastic bar is Located at the second edge of the display panel, both ends of the second elastic bar are fixed adjacent to the third and fourth edges perpendicular to the second edge, and convexly curved of the first elastic bar The first center bar of the center bar is connected to the center, and the second center bar of the center bar is connected to the convexly curved center of the second elastic bar. It is located between the first and second center bars.

In addition, the length adjusting part is provided with a length adjusting hole provided in the first center bar, a length adjusting shaft provided in the second center bar, screwed to the length adjusting hole, and an adjustment nut screwed to the length adjusting shaft. Included, the length adjustment shaft is inserted into the length adjustment hole or withdrawn from the length adjustment hole according to the rotation of the adjustment nut, and the length adjustment unit is provided with a cover shield.

At this time, shafts are protruded at both ends of the first and second elastic bars, and the shaft is assembled and fastened with a fixed holder provided with a screw hole, and the fixed holder includes a plate portion fixed to the display panel. It is assembled and fastened, and the plate part includes a plate fixed to the display panel, and a protruding tab protruding upward from the plate, and the fixing holder includes a bolt hole inserted into the protruding tab.

In addition, a protruding tab to which each end of the first and second elastic bars located at the third edge is fixed, and a protruding tab to which the other ends of the first and second elastic bars located at the fourth edge are fixed. Is provided with threads in opposite directions, and in the process of changing the radius of curvature of the first and second elastic bars, the fixed holder rotates partially along the threads of the protruding tab.

At this time, the diameter of the bolt hole increases as it moves away from the plate, and the bolt hole and the protruding tab are screwed by 0.8 to 1.2 mm height from the plate.

And, the center bar is made of a hexagonal bar (bar), a back cover is located on the back of the display panel, the display panel and the back cover are attached and fixed to each other through an adhesive pad, the rigidity The assembly is positioned on the back side of the back cover, and the plate portion is fixed to the back side of the back cover.

In addition, the back cover is made of aluminum (Al), and the adhesive pad is made of TIM (thermal interface material).

In addition, the adhesive pad covers the entire surface of the display panel or covers the edge of the display panel.

As described above, according to the present invention, by attaching a back cover having excellent thermal conductivity to the back of the display panel with an adhesive pad having excellent heat transfer characteristics, while having excellent heat dissipation characteristics, including a pair of elastic bars as the back of the back cover By positioning the rigid assembly, there is an effect that the rigidity of the display device can be further improved.

Through this, it is possible to maintain a certain stiffness even if the inner plate, which was separately provided for improving the rigidity, is eliminated, and thus has an effect of realizing light weight and thinness while having excellent stiffness. It works.

In addition, even if the warpage deformation of the display device has already occurred, the warpage deformation of the display device can be corrected through the rigid assembly located on the rear surface of the display device, thereby causing damage to the display panel through the warpage deformation of the display device. It also has an effect that can be prevented.

1A is an exploded perspective view schematically showing a display device according to an exemplary embodiment of the present invention.
1B is a schematic cross-sectional view of a portion of the modular display of FIG. 1A.
1C is an enlarged view showing an area A of FIG. 1B enlarged.
2 is an exploded perspective view schematically showing a rear surface of a display device according to an exemplary embodiment of the present invention.
Figure 3a ~ 3b is a perspective view schematically showing the fixing portion of the rigid assembly according to an embodiment of the present invention.
4A to 4B are perspective views schematically showing a center bar and a length adjusting part of a rigid assembly according to an embodiment of the present invention.
5A to 5B are rear views for explaining the driving principle of the rigid assembly according to the embodiment of the present invention.
Figure 6 is a partial cross-sectional view of Figure 3b.

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 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 a region 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 realizing an image and a back cover 120 for supporting the display panel 110.

Here, if the direction on the drawing is defined for convenience of description, the back cover 120 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 a display panel 110 for the next generation display. 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-light emitting device, so it can be thin and light. 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, since 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 implemented and the light emitting area EA, and a 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 the active region 113a constituting the channel and the 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. A 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 and 118b and the two electrodes 118a and 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 the electrodes 118a and 118b, and a gate positioned 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 the gate line (not shown) is located, and the 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 be provided in a bottom gate type made of amorphous silicon of impurities.

In addition, a 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 quantum dots, 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 from each of the pixel areas P from the light emitting diode E.

The overcoat layer 116c having a 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, carbon nanotubes (CNT), graphene (graphene), may be made of silver nanowires (silver nano wire) 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 in which the banks 126 are separated for each pixel area P, using the bank 126 as a boundary for each pixel area 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, a light emitting layer (emitting material layer), an electron transport layer (electron transport layer) and may be composed of multiple layers of an electron injection layer (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 formed 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, which is 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.

Then, 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 encap 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 a 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 light emitted through the organic light emitting layer 125, contrast is achieved. To improve.

As described above, the back cover 120 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 120. Is supported by.

The back cover 120 includes a plate-shaped horizontal portion 121 and an inner hemming hemming portion 123 facing the inner surface of the horizontal portion 121 from the edge of the horizontal portion 121. Includes.

Here, the hemming portion 123 of the back cover 120 improves the rigidity of the back cover 120.

That is, the back cover 120 of the display device 100 according to an embodiment of the present invention can be improved in rigidity, particularly bending rigidity, by the hemming portion 123, through which the overall strength of the display device 100 can be improved. It is possible to increase or decrease the thickness of the back cover 120 under the same strength condition.

The display panel 110 is attached and fixed to the inner surface of the horizontal portion 121 of the back cover 120 through the adhesive pad 140.

At this time, the back cover 120 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 at least one of them made of an alloy material comprising at least plating It might be.

At this time, when the back cover 120 is made of aluminum (Al) having excellent thermal conductivity, the back cover 120 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. As such, the anodized back cover 120 has a black color, so the heat absorption rate increases, and accordingly, the back cover 120 has a higher thermal conductivity characteristic.

Accordingly, the back cover 120 serves to effectively discharge high temperature heat generated from the display panel 110 to the outside.

At this time, the adhesive pad 140 for attaching the display panel 110 to the horizontal portion 121 of the back cover 120 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 an OLED panel to the horizontal portion 121 of the back cover 120 using the adhesive pad 140 made of TIM, the high temperature heat generated from the display panel 110 is externally applied. It is possible to make the heat dissipation more effective.

Here, the adhesive pad 140 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 if a separate inner plate is not provided between the display panel 110 and the back cover 120, the display device 100 according to an embodiment of the present invention is more rigid, which is the back surface of the back cover 120 This is because the rigid assembly 200 is further positioned.

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

In particular, when the warpage deformation of the display device 100 occurs, it is possible to easily correct the warpage deformation of the display device 100, resulting in problems such as damage to the display panel 110 due to the warpage deformation of the display device 100. Can be prevented.

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.

2 is an exploded perspective view schematically showing a rear surface of a display device according to an embodiment of the present invention, and FIGS. 3A to 3B are perspective views schematically showing a fixing part of a rigid assembly according to an embodiment of the present invention.

And, Figures 4a ~ 4b is a perspective view schematically showing the center bar and the length adjusting portion of the rigid assembly according to an embodiment of the present invention, Figures 5a ~ 5b is for explaining the driving principle of the rigid assembly according to an embodiment of the present invention It is a rear view.

And, Figure 6 is a partial cross-sectional view of Figure 3b.

2, the rigid assembly 200 is located on the rear surface of the back cover 120 positioned on the rear surface of the display panel 110 made of an OLED panel. The rigid assembly 200 is largely a pair of elastic bars. (210a, 210b), the center bar 220 connecting the pair of elastic bars 210a, 210b, and the length adjusting unit 230 for adjusting the length of the center bar 220, and a pair of elastic bars 210a , 210b) includes four fixing parts 240 for fixing the back cover 120 to the rear surface.

Here, the pair of elastic bars 210a and 210b are provided at both ends of the longitudinal direction of the back cover 120 (hereinafter, referred to as the X-axis direction in the drawing), respectively, in the X-axis direction of the back cover 120. If one edge is defined as the first edge 121a and the other edge is defined as the second edge 121b, the first elastic bar 210a is positioned on the first edge 121a of the back cover 120 and the second The second elastic bar 210b is positioned at the edge 121b.

In addition, the first and second elastic bars 210a and 210b are respectively fixed to both ends of the Y-axis direction perpendicular to the X-axis direction of the back cover 120, respectively, in the Y-axis direction of the back cover 120. If one edge is defined as the third edge 121c and the other edge is defined as the fourth edge 121d, the first elastic bar 210a located at the first edge 121a of the back cover 120 has one end. It is fixed to the third edge (121c) and the other end is fixed to the fourth edge (121d).

And the second elastic bar 210b located on the second edge 121b of the back cover 120 has one end fixed to the third edge 121c and the other end fixed to the fourth edge 121d.

Accordingly, one end of the first elastic bar 210a is positioned to correspond to the first edge 122a formed by the first edge 121a and the third edge 121c of the back cover 120, and the other end of the back cover 120 The first edge 121a and the fourth edge 121d of 120 are positioned corresponding to the second edge 122b.

In addition, one end of the second elastic bar 210b is positioned to correspond to the third edge 122c formed by the second edge 121b and the third edge 121c of the back cover 120, and the other end of the back cover 120 The second edge 121b of the 120 and the fourth edge 121d are positioned to correspond to the fourth edge 122d.

Here, each end of the first and second elastic bars 210a and 210b positioned in correspondence with the first to fourth corners 122a, 122b, 122c, and 122d of the back cover 120 has respective fixing portions 240 ) Is fixed to the back cover 120, as shown in FIGS. 3A to 3B, each fixing part 240 includes a plate part 241 fixed to the back surface of the back cover 120, and a plate part 241. ), And a fixed holder 243 that is assembled and fastened with the first and second elastic bars 210a and 210b.

Here, when both ends of the first and second elastic bars 210a and 210b are directly fixed to the plate portion 241 fixed to the back surface of the back cover 120, assembly and repair are not easy. Rigid assembly 200 according to an embodiment of the present invention, the plate portion 241, the fixed holder 243, respectively, to be assembled and fastened, the first and second elastic bars 210a, 210b at both ends The end can be solved by assembling and fastening to the fixed holder 243, respectively.

The plate portion 241 includes a plate 241a fixed directly to the back surface of the back cover 120, and a protruding tab 241b protruding upward from the plate 241a, along the outer peripheral surface of the protruding tab 241b A female thread is formed.

Further, the fixing holder 243 is provided with a bolt hole 243a that is fixed to be fitted to the protruding tab 241b, and a male thread engaged with the female thread formed on the outer circumferential surface of the protruding tab 241b along the inner circumferential surface of the bolt hole 243a. Is formed.

At this time, the protruding tabs 241b located at the first and third corners 122a and 122c of the back cover 120 are provided with a female thread rotatable in the clockwise direction, and the second and fourth of the back cover 120 The protruding tabs 241b located at the corners 122b and 122d are provided with female threads rotatable in a counterclockwise direction.

The fixed holder 243 is provided with a screw hole 243b provided with a female thread, and at each end of the first and second elastic bars 210a and 210b, a screw hole 243b of the fixed holder 243 is provided on the outer circumferential surface. A shaft 211 provided with a male thread engaged with a female thread provided in the projection is provided.

Therefore, when the bolt hole 243a of the fixing holder 243 is inserted into the protruding tab 241b protruding upward from the plate 241a of the plate portion 241 and screwed, the first and second elastic bars 210a , 210b), the first and second shafts 211 are screwed to the screw holes 243b of the fixed holder 243 to the screw holes 243b of the first and second elastic bars 210a and 210b. 2 Each end of the elastic bars 210a and 210b is fixed adjacent to the first to fourth corners 122a, 122b, 122c, and 122d of the back cover 120, respectively.

At this time, the bolt hole 243a provided in the fixed holder 243 is assembled to the protruding tab 241b of the plate 241a, and as shown in FIG. 3C, the diameter increases as it moves away from the plate 241a. It is formed to be gradually larger, so that the protrusion tab 241b and the bolt hole 243a are only about 0.8 to 1.2 mm high from the plate 241a.

Through this, the fixed holder 243 and the plate portion 241 can be stably assembled and fastened to each other, while reducing the area where the fixed holder 243 and the plate portion 241 contact each other.

By reducing the contact area between the fixed holder 243 and the plate portion 241 in this way, at the corners 122a, 122b, 122c, 122d of the back cover 120, the display device 100 by the rigid plate 200 It is possible to prevent the bending deformation of the. We will look at this in more detail later.

As described above, when the first and second elastic bars 210a and 210b are located on the first and second edges 121a and 121b of the back cover 120, respectively, the first and second elastic bars 210a and 210b ) Are connected to each other through the center bar 220.

Here, referring to the attached Figure 4a to look more closely at the configuration of the center bar 220, the first and second elastic bars (210a, 210b) are convexly curved toward each other to form a rod shape, the center bar ( 220) extends from the center of the convexly convex shape to the bow shape of the first and second elastic bars 210a and 210b, the first center bar 220a and the second elastic bar extending from the first elastic bar 210a ( It is defined by being divided into a second center bar 220b extending from 210b).

The first and second center bars 220a and 220b are made of a hexagonal bar, and the first center bar 220a is provided with a length adjustment hole 233 in which female threads are formed on the inner circumferential surface. 2 The center bar 220b is provided with a protruding length adjusting shaft 235 provided with a male thread engaging with a female thread provided in the length adjusting hole 233 on the outer circumferential surface, and an adjusting nut 231 in the length adjusting shaft 235 Is assembled.

Here, the length adjustment hole 233 and the length adjustment shaft 235 inserted into the length adjustment hole 233 and the adjustment nut 231 assembled and assembled on the outer circumferential surface of the length adjustment shaft 235 are the length adjustment unit 230 Is achieved.

The adjustment nut 231 is assembled and fastened to the length adjustment shaft 235 and is positioned between the first and second center bars 220a and 220b, thereby adjusting the length adjustment shaft 235 through rotation of the adjustment nut 231. ) May be inserted into the length adjustment hole 233 or may be withdrawn from the length adjustment hole 233.

That is, the first and second center bars 220a and 220b allow the length exposed to the outside of the length adjustment shaft 235 fitted to the length adjustment hole 233 to be adjusted through rotation of the adjustment nut 231. By doing so, the overall length of the center bar 220 is adjusted from the back side of the back cover 120.

That is, by rotating the adjustment nut 231 as shown in FIG. 4B, the length adjustment shaft 235 and the second center bar 220b are also rotated together with the adjustment nut 231, so that the first center bar ( The length adjustment shaft 235 of the second center bar 220b inserted into the length adjustment hole 233 of 220a) is exposed to the outside.

Therefore, the first center bar 220a moves in the -X axis direction defined in the drawing, and the second center bar 220b moves in the + X axis direction defined in the drawing. Through this, the rigid assembly 200 according to an embodiment of the present invention improves the rigidity of the display device 100.

At this time, it is located between the first and second center bar (220a, 220b), substantially the length adjustment shaft 230 consisting of a length adjustment shaft 235 and the adjustment nut 231, the first and second center bar ( Since the stiffness may be weak compared to 220a, 220b), it is preferable to provide a separate cover shield 237 in the length adjusting part 230 so that the stiffness is improved.

The cover shield 237 may be made of a metal, polymer, or polymer composite material having high rigidity, but is not limited thereto.

Here, with reference to FIGS. 5A to 5B, a driving principle in which the rigidity of the display device 100 by the rigid assembly 200 according to an embodiment of the present invention is improved will be described in more detail.

As shown in FIG. 5A, the first elastic bar 210a is located at the first edge 121a and the second elastic bar 210b is located at the second edge 121b as the rear surface of the back cover 120. , The first and second elastic bars 210a and 210b have their ends fixed to the first to fourth corners 122a, 122b, 122c, and 122d, respectively.

The first and second elastic bars 210a and 210b are respectively formed in a bow shape, and the first and second elastic bars 210a and 210b are connected to each other by a center bar 220.

Here, the rod shape of the first and second elastic bars 210a and 210b has a shape extending in the Y-axis direction, but the extension direction gradually changes to form a bar having a curved or curved shape as a whole. Each of the first and second elastic bars 210a and 210b is formed in a curved shape having a curvature by applying tension to a straight bar, and the first and second elastic bars 210a and 210b are It is made of a convexly curved shape toward.

While the first and second elastic bars 210a and 210b are easy to manufacture a curved shape, a material having a stiffness sufficient to cause deformation by applying a tensile force to the display device 100 using the curved shape. It is preferable to be made of.

The stiffness of the first and second elastic bars 210a and 210b is preferably formed at least as large as the stiffness of the display device 100, and the display device 100 is provided through the first and second elastic bars 210a and 210b. ), If the rigidity of the first and second elastic bars 210a and 210b is smaller than that of the display device 100, the first and second elastic bars 210a, instead of the display device 100, 210b) can be deformed.

Therefore, the first and second elastic bars 210a and 210b may be made of a metal, polymer, or polymer composite material having high rigidity, but is not limited thereto.

In addition, as the first and second elastic bars 210a and 210b are in close contact with the back surface of the back cover 120 of the display device 200, friction so that sliding motion with the back cover 120 can be smoothly achieved It is desirable that the material is made of a material having low wear resistance.

In addition, the center bar 220 extends in the X-axis direction to connect the first and second center bars 220a and 220b, and the outer surface may be formed in a hexagonal column shape.

Here, when the outer surface of the center bar 220 is formed in a non-circular hexagonal column shape, the length adjustment shaft 235 formed on the second center bar 220b is rotated as the adjustment nut 231 is rotated. As the second center bar 220b is also rotated like the adjustment nut 231 while coming out of the length adjustment hole 233 formed in the bar 220a, the rotation amount of the second center bar 220b can be more effectively controlled. It becomes possible.

At this time, the first center bar 220a does not rotate separately, but in consideration of the connection with the second center bar 220b, the first center bar 220a also has a hexagonal column shape with an outer surface similar to the second center bar 220b. It is desirable to be made.

The center bar 220 is also preferably formed larger than the stiffness of the display device 100. In particular, the center bar 220 has greater stiffness than the first and second elastic bars 210a and 210b. Preferably, the first and second elastic bars 210a and 210b are tensioned through the center bar 220 so that the shapes of the first and second elastic bars 210a and 210b can be changed. It is for sake.

Therefore, the center bar 220 may also be made of a metal, polymer, polymer composite material, etc. having high rigidity, but is not limited thereto.

In addition, as the center bar 220 is also in close contact with the back surface of the back cover 120 of the display device 100, it is made of a material having low friction and good abrasion resistance so that sliding motion with the back cover 120 can be smoothly performed. It is desirable to be made.

Each end of the first and second elastic bars 210a and 210b has a back cover of the display device 100 so that the first and second elastic bars 210a and 210b have a convexly curved shape toward each other ( If the first to fourth corners (122a, 122b, 122c, 122d) of the rear of the 120) are fixed through the fixing part 240, the first and second elastic bars 210a, 210b are displayed on the display device 100 as described above. ), The display device 100 is improved in stiffness as much as it corresponds to the stiffness of the first and second elastic bars 210a and 210b.

In particular, as shown in FIG. 5B, as the adjustment nuts 230 positioned between the first and second center bars 220a and 220b of the center bar 220 are rotated, the length is adjusted together with the adjustment nut 230. The shaft 235 and the second center bar 220b are also rotated together. Therefore, while the length adjustment shaft 235 of the second center bar 220b inserted into the length adjustment hole 233 of the first center bar 220a is exposed to the outside, the first center bar 220a is shown in the drawing. It moves in the defined -X axis direction, and the second center bar 220b moves in the + X axis direction defined in the drawing.

In this way, as the first and second center bars 220a and 220b move in the -X axis and the + X axis respectively defined in the drawing, the convexly curved curvatures of the first and second elastic bars 210a and 210b. Will change the radius of.

That is, the first center bar 220a exerts a force on the convexly curved central portion of the first elastic bar 210a, and the convexly curved central portion of the first elastic bar 210a is the first center bar 220a. As it moves toward one edge 121a, the radius of curvature of the first elastic bar 210a becomes small.

Accordingly, the tensile force corresponding to the decreasing radius of curvature of the first elastic bar 210a is converted into a compressive force and transmitted to both ends of the first elastic bar 210a, respectively, to both ends of the first elastic bar 210a. The transmitted compressive force is transmitted to the first and second corners 122a and 122b of the back cover 120 and more specifically, the display device 100.

At this time, the compressive force transmitted to the first edge 122a is the first compressive force F1 and the first elastic bar 210a transmitted in the -X axis direction defined as a drawing in which the tensile force of the first elastic bar 210a is reduced. ) Is divided by the second compression force (F2) transmitted in the + Y axis direction defined in the drawing applied in the longitudinal direction.

Then, the first compression force F1 and the third compression force F3 are applied to the second edge 122b in the + X axis direction and the -Y axis direction, respectively, as defined in the drawing.

At this time, the tensile force corresponding to the radius of curvature of the first elastic bar 210a is converted into a compressive force to each end of the first elastic bar 210a and then transferred to each other, and fixed to both ends of the first elastic bar 210a. The fixed holder 243 is rotated partly clockwise along the thread of the protruding tab 241b of the plate portion 241, so that the tensile force corresponding to the radius of curvature of the first elastic bar 210a is more easily the first elastic It can be converted into a compression force transmitted to both ends of the bar (210a).

In addition, the second center bar 220b also applies a force to the convexly curved central portion of the second elastic bar 210b, so that the convexly curved central portion of the second elastic bar 210b is the second of the display device 100. As it moves toward the edge 121b, the radius of curvature of the second elastic bar 210b becomes small, and compressive force is transmitted to both ends of the second elastic bar 210b in response to the reduced radius of curvature.

Therefore, the compressive force transmitted to both ends of the second elastic bar 210b is transmitted to the third and fourth corners 122c and 122d of the display device 100, and the third corner 122c is defined as a drawing. The second compressive force (F2) and the fourth compressive force (F4) are applied in the + Y-axis direction and the + X-axis direction, respectively, and in the -Y-axis direction and + X-axis direction defined in the drawing at the fourth edge 122d. The third compressive force F3 and the fourth compressive force F4 are applied, respectively.

At this time, the fixed holder 243 fixed to both ends of the second elastic bar 210b is also rotated partially counterclockwise along the threads of the protruding tabs 241b of the plate portion 241, thereby allowing the second elastic bar ( The tensile force corresponding to the radius of curvature of 210b) can be more easily converted into a compressive force transmitted to both ends of the second elastic bar 210b.

Through this, a compressive force is applied to the first to fourth corners 122a, 122b, 122c, and 122d of the display device 100 in two directions at right angles, that is, the first corner 122a has a first force. And the second compression force (F1, F2) is applied, the first and third compression force (F1, F3) is applied to the second edge (122b), the second and fourth compression force to the third edge (122c) (F2, F4) is applied, and the third and fourth compression forces F3 and F4 are applied to the fourth edge 122d.

As described above, as the compressive force is applied to the first to fourth corners 122a, 122b, 122c, and 122d in two directions perpendicular to each other, the first to fourth corners 122a, 122b, 122c, and 122d are vectored. By adding (vector), a substantial force F is applied in the diagonal direction between the ± X axis direction and the ± Y axis direction defined in the drawing.

The force F applied in the diagonal direction between the ± X axis direction and the ± Y axis direction defined in the drawing is radial toward the first to fourth corners 122a, 122b, 122c, and 122d of the display device 100 Because it is acting as, the display device 100 according to an embodiment of the present invention is further improved in rigidity by the force (F) applied to each corner (122a, 122b, 122c, 122d).

That is, the display device 100 according to an embodiment of the present invention is positioned on the back side by placing the rigid assembly 200 including a pair of elastic bars 210a and 210b, thereby increasing the rigidity of the pair of elastic bars 210a and 210b. While being able to improve the stiffness as much as possible, it is also possible to apply a constant force F in the radial direction of the display device 100 by changing the curvature radius of the pair of elastic bars 210a and 210b, The stiffness of the display device 100 can be further improved.

In particular, the rigid assembly 200 according to the embodiment of the present invention is positioned on the both sides of the longitudinal direction of the display device 100, each of a pair of elastic bars (210a, 210b) and using a center bar 220, a pair of By connecting the elastic bars 210a and 210b, while avoiding the addition of separate structures, the rigidity of the display device 100 can be seen only by the simple structure and shape of the pair of elastic bars 210a and 210b and the center bar 220. Can be improved.

That is, the display device 100 according to an embodiment of the present invention can maintain a certain stiffness even if the inner plate was separately provided to improve the stiffness, so it is excellent in stiffness and can realize lightweight and thin, and eliminates the inner plate. The efficiency of the process can also be improved.

In addition, even when bending deformation of the display device 100 has already occurred, each edge 122a, 122b, 122c, 122d of the display device 100 is provided through the rigid assembly 200 located on the rear surface of the display device 100. By applying the force F, it is possible to correct the warpage deformation of the display device 100. Accordingly, damage to the display panel 110 through bending deformation of the display device 100 may also be prevented.

As an example, as the display panel 110 and the back cover 120 are attached to each other through the adhesive pad 140, the display device 100 has a smaller display panel 110 than the back cover 120. The bending deformation may occur concavely based on the located front, but when the bending deformation of the display device 100 occurs, peeling of the display panel 110 and the back cover 120 occurs, and thus the display panel Damage of 110 may be caused.

At this time, the display device 100 according to an embodiment of the present invention is the first and the first by adjusting the length of the center bar 220 through the length adjusting unit 230 of the rigid assembly 200 even if bending deformation has already occurred. 2 By changing the radius of curvature of the elastic bars 210a and 210b, a bending force can be corrected by applying a constant force F to the four corners 122a, 122b, 122c, and 122d of the display device 100.

Meanwhile, referring to FIG. 6 attached here, the structure of the fixing part 240 will be described in more detail. The bolt hole 243a provided in the fixing holder 243 of the fixing part 240 protrudes from the plate part 241. In the state fitted to the tab 241b, the diameter is gradually increased as it moves away from the plate 241a.

Therefore, the protrusion tab 241b and the bolt hole 243a are screwed only about 0.8 to 1.2 mm in height (h) from the plate 241a, so that the fixed holder 243 and the plate portion 241 are stably assembled with each other. And while being able to be fastened, it is possible to reduce the area where the fixed holder 243 and the plate portion 241 contact each other.

As described above, by reducing the contact area between the fixed holder 243 and the plate portion 241, the bolt hole 243a fixed to the protrusion tab 241b is fixed fluidity as it moves away from the plate 241a. Through this, it is possible to prevent the bending deformation at the edges 122a, 122b, 122c, and 122d of the display device 120 by the rigid plate 200.

That is, as the length of the center bar 220 is adjusted through the length adjusting part 230 of the rigid assembly 200, the curvature radii of the first and second elastic bars 210a and 210b are changed to compress pressure at both ends. In the process of transmitting, if too large a compressive force is transmitted, it is possible to cause bending deformation of the edges 122a, 122b, 122c, and 122d of the display device 100.

At this time, the contact area between the fixed holder 243 and the plate portion 241 is reduced, so that the bolt hole 243a fixed to the protrusion tab 241b has constant fluidity, thereby greatly increasing the fluidity of the bolt hole 243a. This is to offset some of the compression force transmitted. Through this, it is possible to prevent bending deformation at the edges 122a, 122b, 122c, and 122d of the display device 100 by the rigid plate 200.

As described above, the display device 100 according to an embodiment of the present invention is positioned by placing the rigid assembly 200 including a pair of elastic bars 210a and 210b on the rear surface, thereby providing a pair of elastic bars 210a and 210b. While being able to further improve the stiffness as much as corresponding to the stiffness, it is also possible to apply a constant force F radially to the display device 100 by changing the radius of curvature of the pair of elastic bars 210a and 210b. , It is possible to further improve the rigidity of the display device 100.

In particular, the display device 100 according to an embodiment of the present invention can maintain a certain stiffness even if the inner plate was separately provided to improve the stiffness. The efficiency of the process can also be improved.

In addition, even when bending deformation of the display device 100 has already occurred, each edge 122a, 122b, 122c, 122d of the display device 100 is provided through the rigid assembly 200 located on the rear surface of the display device 100. By applying the force F, it is possible to correct the warpage deformation of the display device 100. Accordingly, damage to the display panel 110 through bending deformation of the display device 100 may also be prevented.

On the other hand, in the above description, although the rigid assembly 200 according to the embodiment of the present invention has been described and illustrated as an example of the position of the rear surface of the back cover 120, the rigid assembly 200 of the display panel 110 It is fixed to the rear surface, and may be positioned between the display panel 110 and the back cover 120.

At this time, the back cover 120 may be provided with a stepped intaglio shape to correspond to the shape of the rigid assembly 200, and the display panel 110 and the back cover 120 along the rear edge of the display panel 110. It can be attached and fixed to each other through the provided adhesive pad 140, it is preferable that the adhesive pad 140 and the rigid assembly 200 positioned on the rear surface of the display panel 110 do not interfere with each other.

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 gist of the present invention.

100: display device
120: back cover (121a, 121b: first and second edges, 122a, 122b, 122c, 122d: first to fourth corners)
210a, 210b: first and second elastic bars
220: center bar (220a, 220b: first and second center bar)
230: length adjustment unit (231: adjustment nut, 233: length adjustment hole, 235: length adjustment shaft)
240: fixing part

Claims (17)

A display panel;
A rigid assembly including first and second elastic bars positioned on the rear surface of the display panel and positioned at both ends in the longitudinal direction of the display panel and having convexly curved curvature in directions facing each other.
Display device comprising a.
According to claim 1,
A display device in which the curvature radius of the first and second elastic bars and the rigidity of the display panel are inversely proportional to each other.
According to claim 1,
The first and second elastic bars are connected to each other through a center bar fixed to the center, respectively, and the center bar is provided with a length adjusting unit for changing the radius of curvature of the first and second elastic bars.
The method of claim 3,
The first elastic bar is located at the first edge of the display panel, and both ends of the first elastic bar are fixed adjacent to the third and fourth edges perpendicular to the first edge,
The second elastic bar is located at the second edge of the display panel, and both ends of the second elastic bar are fixed adjacent to the third and fourth edges perpendicular to the second edge,
The first center bar of the center bar is connected to the convexly curved center of the first elastic bar, and the second center bar of the center bar is connected to the convexly curved center of the second elastic bar, and the length adjusting part A display device positioned between the first and second center bars.
The method of claim 4,
The length adjustment portion includes a length adjustment hole provided in the first center bar, a length adjustment shaft provided in the second center bar, screwed to the length adjustment hole, and an adjustment nut screwed to the length adjustment shaft, ,
The length adjustment shaft is a display device that is inserted into the length adjustment hole or withdrawn from the length adjustment hole according to the rotation of the adjustment nut.
The method of claim 5,
A display device provided with a cover shield in the length adjusting part.
The method of claim 4,
Shafts are provided at both ends of the first and second elastic bars, respectively, and the shaft is assembled and fastened with a fixed holder provided with a screw hole, and the fixed holder is assembled with a plate portion fixed to the display panel and Display device to be fastened.
The method of claim 7,
The plate portion includes a plate fixed to the display panel, and a protruding tab protruding upward from the plate,
The fixed holder is a display device including a bolt hole is inserted into the protrusion tab.
The method of claim 8,
Each of the first and second elastic bars located at the third edge is fixed to the protruding tabs, and the first and second elastic bars located at the fourth edge are fixed to the other ends of the protruding tabs. Display device provided with threads in the opposite direction.
The method of claim 9,
In the process of changing the radius of curvature of the first and second elastic bars, the fixing holder rotates partially along the thread of the protruding tab.
The method of claim 8,
The bolt hole is a display device having a larger diameter as it moves away from the plate.
The method of claim 11,
The bolt hole and the protruding tab is a display device that is screwed to the height of 0.8 ~ 1.2mm from the plate.
The method of claim 4,
The center bar is a display device made of a hexagonal bar.
The method of claim 7,
A back cover is located on the rear surface of the display panel, and the display panel and the back cover are attached and fixed to each other through an adhesive pad.
The rigid assembly is located on the back cover,
The plate portion is a display device that is fixed to the back of the back cover.
The method of claim 14,
The back cover is a display device made of aluminum (Al).
The method of claim 14,
The adhesive pad is a display device made of a thermal interface material (TIM).
The method of claim 14,
The adhesive pad is a display device that covers the front of the display panel or covers the edge of the display panel.

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