KR102622077B1 - Display device - Google Patents

Abstract

The present invention relates to a display device that is lightweight and thin while having improved rigidity and heat dissipation performance.
A feature of the present invention is to place a rigid assembly on the inner surface of the horizontal portion of the back cover, so that a certain force is applied to the four corners of the back cover through the rigid assembly.
Through this, the present invention can improve the rigidity of the back cover three times, thereby further improving the rigidity of the display device.
Therefore, high rigidity can be maintained even if the inner plate that was separately provided to improve rigidity is deleted, so it is possible to achieve light weight and thinness while maintaining excellent rigidity, and the efficiency of the process can also be improved by removing the inner plate.

Description

Display device

The present invention relates to a display device that is lightweight and thin while having improved rigidity and heat dissipation performance.

An organic light emitting diode (OLED) consists 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 is emitted by the energy generated when

Based on this principle, OLED has self-luminous properties and, unlike liquid crystal displays, does not require a separate light source, so thickness and weight can be reduced. In addition, OLED is considered a next-generation display device for portable electronic devices because it exhibits high-quality characteristics such as low power consumption, high brightness, and high response speed.

In general, OLED includes an OLED panel including organic light-emitting layers inside, and a back cover that is coupled to the OLED panel and supports the OLED panel.

On the other hand, since these OLEDs have self-luminous properties, when operated for a long time, the organic light-emitting layer deteriorates due to heat generated from the organic light-emitting layer itself of the OLED panel, resulting in denaturation and decomposition. Therefore, differences in luminance between pixels occur, resulting in deterioration of image quality and lifespan, such as afterimages. In particular, as OLEDs become larger, this deterioration problem becomes more noticeable.

In addition, since these OLEDs have fewer components than liquid crystal displays, they can be lightweight and thin, but have the problem of lower rigidity compared to liquid crystal displays, which ultimately reduces the reliability of the product.

Therefore, in order to solve this problem, an inner plate that reinforces the rigidity of the OLED and functions as a heat dissipator is placed between the OLED panel and the back cover. In order to secure sufficient rigidity and heat dissipation function of the OLED, the inner plate must be thick. It is desirable to form it to have.

In this way, it becomes difficult for OLEDs containing an inner plate made of a thick metal material to be lightweight and thin, which are recently required.

In addition, the inner plate is an expensive material, so when using this inner plate, the process cost increases, thereby lowering the efficiency of the process.

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

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

In order to achieve the purpose as described above, the present invention includes a display panel, a back cover located on the back of the display panel, and a plurality of devices located between the display panel and the back cover and extending to each corner of the back cover. A main arm assembly including a main arm, and a rigid assembly including a sub-arm assembly including a plurality of sub-arms each assembled and fastened to the plurality of main arms, and the force applied to the sub-arm assembly A display device is provided that applies a certain force to each corner through a 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 includes A sub-arm fixing holder including a second plate having a protruding protrusion hole into which the protruding protrusion is inserted, one end assembled and fastened with the sub-arm fixing hole, and the other end each assembled and fastened with the plurality of main arms. It includes a plurality of sub-arms, wherein one end of the plurality of main arms is inclined at a certain angle toward the sub-arm assembly with respect to the first plate, and has a front side facing the sub-arm assembly and a side opposite to the front side. It can be raised and lowered rearward, and the plurality of sub-arms can be raised and lowered rearward and forward, with 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, the main arms can be raised and lowered by rotation of the main arm fixing holder toward the front and rear, and the sub One end of the 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, and the sub-arms are connected to the first sub-arm holder. The raising and lowering is possible by the forward and backward rotation of the first and second sub-arm holders, and the force applied to the sub-arm assembly allows the main arm assembly and the sub-arm assembly to come into close contact with each other. A reaction force is generated, 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 the inner surface of the horizontal part of the back cover, and the rigid groove is located in the center of the horizontal part 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, where the main arm and the sub arm are respectively located.

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

Additionally, 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 TIM (thermal interface material).

In addition, the present invention includes a display panel, a back cover located on the back of the display panel, and a rigid assembly located between the display panel and the back cover, wherein one end of the rigid assembly extends to each corner of the back cover. The other end is a main arm assembly including a plurality of main arms each rotatably mounted on a first plate toward the back cover, and one end of the plurality of main arms is each vertically movable toward the plurality of main arms. and are respectively assembled and fastened to each other, and the other end includes a sub-arm assembly including a plurality of sub-arms each mounted on a second plate to be assembled and fastened to the first plate so as to be vertically movable toward the first plate, The main arm assembly and the sub arm assembly provide a display device positioned in close contact with each other.

Here, the first plate is provided with a protruding protrusion, the second plate is provided with a protruding 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 that contacts the ends of the plurality of main arms is located at the end 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, the rigidity of the back cover can be further improved by applying a certain force to the four corners of the back cover through the rigid assembly. This has the effect of further improving the rigidity of the display device.

Therefore, even if the inner plate that was provided separately to improve rigidity is deleted, high rigidity can be maintained, which has the effect of realizing light weight and thinness while maintaining excellent rigidity, and also improving process efficiency by removing the inner plate. There is.

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 portion of the modular display device of FIG. 1A.
FIG. 1C is an enlarged view of area A of FIG. 1B.
Figure 2a is a perspective view schematically showing the inner surface of a horizontal portion of a back cover according to an embodiment of the present invention.
FIG. 2B is an enlarged cross-sectional view of area 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 rigid assembly fully unfolded.
FIGS. 4A to 4B are enlarged views showing area C of FIG. 3A.
FIGS. 5A to 5B are enlarged views of area D in FIG. 3A.
FIGS. 6A to 6B are enlarged views showing 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.
Figures 8a to 8b are cross-sectional views schematically showing the force applied by the main arm.

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

FIG. 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 section A of FIG. 1B. This is an enlarged view.

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

Here, if the direction in the drawing is defined for convenience of explanation, the back cover 140 is located behind the display panel 110 under the premise that the display surface of the display panel 110 faces forward.

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

Here, the display panel 110 that implements an image is a liquid crystal display device (LCD), a plasma display device (PDP), a field emission display device (FED), or an electric display device. It can be made of either an electroluminescence display device (ELD) or an organic light emitting diode (OLED). The display device 100 according to an embodiment of the present invention is a display panel 110, which is a recent next-generation display device. I will explain the OLED panel, which is in the spotlight as a device, as an example.

OLED panels are self-emitting devices and do not require the backlight used in liquid crystal displays, which are non-light emitting devices, so they can be lightweight and thin, have superior viewing angles and contrast ratios compared to liquid crystal displays, and are also advantageous in terms of power consumption. It has the advantages of being capable of low-voltage operation, fast response speed, resistance to external shocks because the internal components are solid, and a wide operating temperature range.

In particular, because the manufacturing process is simple, it has the advantage of significantly reducing production costs compared to existing liquid crystal display devices.

In this OLED panel, the substrate on which the driving thin film transistor and light emitting diode are formed is encapsulated by an encapsulating substrate.

Before taking a closer look, the OLED panel, which is the display panel 110 according to an embodiment of the present invention, is divided into a top emission type and a bottom emission type depending on the transmission direction of the emitted light. Hereinafter, the present invention will describe the bottom light emitting method as an example.

For convenience of explanation, each pixel area (P) is equipped with a light emitting diode (E) and is located along the edge of the light emitting area (EA) where an image is actually implemented, and a driving thin film transistor (DTr). ) is defined as the non-emissive area (NEA) including the switching area (TrA) in which ) is formed.

A semiconductor layer 113 is located on the switching area (TrA) located within the non-emissive area (NEA) of each pixel area (P) on the substrate 101 of this OLED panel. The semiconductor layer 113 is made of silicon. The central portion is composed of an active region 113a forming a channel, and source and drain regions 113b and 113c doped with a high concentration of impurities on both sides of the active region 113a.

A gate insulating film 115 is located on the top of the semiconductor layer 113, and a gate electrode 117, which is not shown in the drawing, extends in one direction corresponding to the active area 113a of the semiconductor layer 113. Gate wiring (not shown) is provided.

In addition, a first interlayer insulating film 116a is located on the upper part including the gate electrode 117 and the gate wiring (not shown), and at this time, the first interlayer insulating film 116a and the gate insulating film 115 below it are in the active area. (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, on the top of the first interlayer insulating film 116a including the first and second semiconductor layer contact holes 119, source and drain regions 113b are spaced apart from each other and exposed through the first and second semiconductor layer contact holes 119. , 113c) and are provided with source and drain electrodes 118a and 118b, respectively.

In addition, the second interlayer insulating film 116b is located on the source and drain electrodes 118a and 118b and the first interlayer insulating film 116a exposed between 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 in contact with the electrodes 118a and 118b, and the gate located on top of the semiconductor layer 113. The insulating film 115 and the gate electrode 117 form a driving thin film transistor (DTr).

Meanwhile, although not shown in the drawing, there is a data wire (not shown) that intersects the gate wire (not shown) to define each pixel area (P), and the switching thin film transistor (not shown) is the driving thin film transistor (DTr). It has the same structure as and 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 an amorphous silicon thin film transistor (a-Si TFT), a polycrystalline silicon thin film transistor (p-Si TFT), or a single crystal silicon thin film transistor (DTr) depending on the type of the semiconductor layer 113. It can be divided into a thin film transistor (c-Si TFT), an oxide thin film transistor (oxide TFT), etc. In the drawing, the semiconductor layer 113 is shown as an example of the top gate type, but as a variation of this, pure and It may also be provided as a bottom gate type made of impurity amorphous silicon.

And the wavelength conversion layer 121 is located on the second interlayer insulating layer 116b corresponding to the emission area EA of each pixel area P.

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

Here, the wavelength conversion layer 121 can 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 composed of adjacent red, green, and blue pixel areas (P), and in this case, the red pixel area 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.

Additionally, in the OLED panel according to an embodiment of the present invention, one unit pixel may further include a white pixel area 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 that re-emits according to the white light emitted from the light emitting diode (E) and emits light of a color set in each pixel region (P). Here, the quantum dots are CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, GaN, GaP, GaAs, AlN, AlP, AlAs, InN, InP, InAs, GaNP, GaNAs, GaPAs , 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 necessarily limited thereto. .

For example, the wavelength conversion layer 121 in the red pixel area is a quantum dot of CdSe or InP, the wavelength conversion layer 121 in the green pixel area is a quantum dot of CdZnSeS, and the wavelength conversion layer 121 in the blue pixel area is a quantum dot of ZnSe. Each may include quantum dots. In this way, an OLED panel in which the wavelength conversion layer 121 includes quantum dots can have a high color gamut.

The wavelength conversion layer 121 according to another example may be made 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 the light emitting diode (E) for each pixel area (P).

An overcoat layer 116c having a drain contact hole (PH) exposing the drain electrode 118b along with the second interlayer insulating film 116b is located on top of the wavelength shift layer 121, and is located on top of the overcoat layer 116c. is connected to the drain electrode 118b of the driving thin film transistor DTr, and for example, the first electrode 123, which is made of a material with a relatively high work function value and forms the anode of the light emitting diode E, is located.

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

This first electrode 123 is located for each pixel area (P), and a bank (bank: 126) is located between the first electrodes 123 located for each pixel area (P). That is, the first electrode 123 has a structure separated for each pixel area (P) with the bank 126 as a boundary for each pixel area (P).

And the organic light-emitting layer 125 is located on top of the first electrode 123. The organic light-emitting layer 125 may be composed of a single layer of a light-emitting material, and a hole injection layer to increase light emission efficiency. , it may be composed of multiple layers of 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 located on the entire surface of the organic light emitting layer 125.

Here, the organic light-emitting layer 125 may be made of a common layer commonly formed in the pixel areas P, and may be a white light-emitting layer that emits white light.

Alternatively, the organic light emitting layer 125 may be separated for each pixel region (P) and made of different materials. At this time, 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).

And the second electrode 127 may be made of a material with a relatively small work function value. At this time, the second electrode 127 has a double-layer structure, and is composed of a single layer or multiple layers of an alloy composed of a first metal made of Ag, a metal material with a low work function, etc., and a second metal made of Mg, etc., in a certain ratio. It can be configured.

This second electrode 127 may be made 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 a predetermined voltage is applied to the first electrode 123 and the second electrode 127 according to a selected signal, the display panel 110 emits 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 the excited state to the ground state, light is generated and emitted in the form of visible light.

At this time, the emitted light passes through the transparent first electrode 123 and goes out, so the display panel 110 implements an arbitrary image.

Then, an encap substrate 112 in the form of a thin film is placed on the driving thin film transistor (DTr) and the light emitting diode (E), and then a transparent and adhesive material is placed between the light emitting diode (E) and the encap substrate 112. The display panel 110 is encapsulated by bonding the encap substrate 112 and the substrate 111 through the face seal 114 made of an organic or inorganic insulating material.

In addition, the display device 100 according to an embodiment of the present invention includes a polarizer 130 on the outer surface of the substrate 111 through which the light of the display panel 110 made of an OLED panel passes, to prevent the contrast from being lowered by external light. ) is located, that is, when the OLED panel is in a driving mode that produces an image, the polarizer 130, which blocks external light incident from the outside, is positioned in the transmission direction of the light emitted through the organic light emitting layer 125, thereby maintaining contrast. will improve.

In this way, the back cover 140 is located on the back of the display panel 110 to which the polarizer 130 is attached, more precisely, on the outer surface of the encapsulator 112, so that the display panel 110 is attached to the back cover 140. supported by The back cover 140 includes a plate-shaped horizontal portion 141 and a hemming portion 143 that is inner hemmed from the edge of the horizontal portion 141 to face the inner surface 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 embodiment of the present invention is made of a metal material with a thin thickness of about 0.3 to 0.5 T. Even if the back cover 140 is formed thin in this way, the edges are Rigidity, especially bending rigidity, can be improved by the hemming portion 143 formed along the hemming portion. Through this, the overall strength of the display device 100 can be increased, or the thickness of the back cover 140 can be reduced under the same strength conditions.

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

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

At this time, when the back cover 140 is made of aluminum (Al) with excellent thermal conductivity, it is preferable that the back cover 140 is made of aluminum (Al) with a purity of 99.5%, and further, anodizing treatment is performed. It is preferable that a black oxide film is formed on the surface. The back cover 140 that has been anodized in this way becomes black, so the heat absorption rate increases, and thus the back cover 140 has higher heat conduction characteristics.

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

At this time, the adhesive pad 150 that attaches the display panel 110 to the horizontal portion 141 of the back cover 140 may be made of a soft material, for example, TIM (thermal interface material). TIM has interface properties and heat transfer properties. Materials with excellent properties may include silicon-based materials.

By attaching the display panel 110 made of an OLED panel to the horizontal part 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 discharged to the outside. Heat can be dissipated more effectively.

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

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

Through this, the display device 100 according to an embodiment of the present invention can be lightweight and thin while having excellent heat dissipation characteristics, and its rigidity is also improved.

Additionally, the efficiency of the process is also improved by removing the inner plate.

Let us take a closer look at this by referring 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, and Figure 2b is an enlarged cross-sectional view of area B of Figure 2a.

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

At this time, the inner surface of the horizontal portion 141 is provided with a rigid groove 210 where the rigid assembly 200 (see FIG. 3A) is located. The rigid groove 210 is formed at the center of the back cover 140, providing rigidity. Four corners of the back cover 140 based on the central portion 210a where the main arm fixing holder 225 (see Fig. 3a) and the sub-arm fixing holder 245 (see Fig. 3a) of the assembly 200 (see Fig. 3a) are located. It includes extension portions 210b extending respectively toward.

The main arm 231 (see FIG. 3A) and the sub-arm 251 (see FIG. 3A) of the rigid assembly 200 (see FIG. 3A) are located in each extension portion 210b.

At this time, as shown in Figure 2b, a stopper 213 is provided at the end of each extension part 210b. The stopper 213 includes a stopper part 213b inserted into the end of the extension part 210b, and a stopper 213b. It includes a stopper guide (213a) that covers and covers the upper part of the portion (213b).

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

The display device (100 in FIG. 1C) including the back cover 140 can maintain excellent rigidity without a separate inner plate, and can also be made lightweight and thin by removing the inner plate.

Additionally, the efficiency of the process is also improved by removing the inner plate.

Here, we will look at 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 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, and Figure 3b is a perspective view schematically showing the rigid assembly unfolded.

In addition, Figures 4a to 4b are perspective views schematically showing the main arm fixing holder and the main arm holder of the rigid assembly, and are enlarged views of area C in Figure 3a, and Figures 5a to 5b are the sub-arm holders of the rigid assembly. is a perspective view schematically showing, and is an enlarged view of area D in Figure 3a, and Figures 6a to 6b are perspective views schematically showing the connection between the main arm and sub-arm of the rigid assembly, area F in Figure 3a. This is an enlarged view of .

Figure 7 is a front view schematically showing the inner surface of the horizontal portion of the back cover equipped with a rigid assembly, and Figures 8a to 8b are cross-sectional views schematically showing the force 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 assembly 240. It consists of four main arms (231) fixed to the fixed holder (225) through the main arm holder (233).

Looking at its configuration in more detail with FIGS. 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, and the first The plate 221 is provided with a pair of first fixing holders 227a and 227b in each direction.

The pair of first fixing holders 227a and 227b are each provided with a first fixing hole 229, and the main arm holders 233 provided at each end of the four main arms 231 are provided with a pair of first fixing holes 229. The first fixing protrusions 235 that are respectively inserted into the first fixing holes 229 of the holders 227a and 227b protrude, so that each end of the main arm 231 has a first fixing protrusion (235) of the main arm holder 233. 235) is inserted and fixed into the first fixing holes 229 of the first fixing holders 227a and 227b, respectively.

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

Accordingly, the main arms 231 mounted in all four directions of the main arm fixing holder 225 can be raised and lowered in the +Z-axis and -Z-axis directions defined in the drawing through the main arm holder 233.

This main arm assembly 230 allows the main arm fixing holder 225 to be located at the center of the inner surface of the horizontal part 141 of the back cover 140, and the main arms (each mounted in all directions on the main arm fixing holder 225) 231) has a length extending from the main arm fixing holder 225 to each of the four corners of the back cover 140.

And referring to FIGS. 5A to 5B, one end of the sub-arm assembly 240 is fixed to the sub-arm fixing holder 245 and the first sub-arm holder 253, and the other end is fixed to the sub-arm fixing holder 245. It consists of four sub-arms 251 that are respectively 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 second plate 241 and a pair of second fixing holders 247a and 247b provided in all directions of the second plate 241, respectively. The sub-arm fixing holder 245 ) of the second plate 241 is provided with a protrusion hole 243 into which the protrusion 223 provided on the first plate 221 of the main arm fixing holder 230 is inserted.

And each of the pair of second fixing holders 247a and 247b is provided with a second fixing hole 249, and the first sub-arm holder 253 provided at each end of the four sub-arms 251 has a pair of fixing holes 249. Second fixing protrusions 255 that are respectively inserted into the second fixing holes 249 of the second fixing holders 247a and 247b protrude.

Accordingly, each end of the four sub-arms 251 is inserted into the second fixing protrusion 255 of the first sub-arm holder 253 into the second fixing hole 249 of the second fixing holders 247a and 247b, respectively. It is inserted and fixed.

The second fixing hole 249 and the second fixing protrusion 255 are both circular, and the second fixing protrusion 255 is mounted to rotate up and down while being inserted into the second fixing hole 249. The sub-arms 251 mounted in all four directions of the sub-arm fixing holder 245 can also be raised and lowered 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 sub arm 251 is The second sub-arm holder 257 provided at the other end is provided with a pair of third fixing holders (259a, 259b), and each of the pair of third fixing holders (259a, 259b) is provided with a third fixing hole 258. It is done.

In addition, each main arm 231 of the main arm assembly 230 is provided with a protruding holder 237, and each third fixing hole 258 of the pair of third fixing holders 259a and 259b is provided in the protruding holder 237. ) is provided to protrude, and the other end of each of the four sub-arms 251 is inserted into the main arm (259a, 259b) of the second sub-arm holder 257. The third fixing protrusion 239 provided on the protruding holder 237 of 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 on the protruding holder 237 is also circular, so that the second sub The arm holder 257 is assembled and fastened to each other by inserting the third fixing protrusion 239 into the protruding holder 237 and the third fixing holes 259a and 259b, and the +Z axis and the +Z axis defined in the drawing. -Can go up and down in the Z-axis direction.

This rigid assembly 200 applies force from the front of the sub-arm assembly 240 toward the main arm assembly 230, thereby attaching force to the first plate 221 of the main arm assembly 230 as shown in FIG. 2B. The protruding protrusion hole 243 provided in the second plate 241 of the sub-arm assembly 240 is inserted into the protruding protrusion 223 and comes into close contact with each other.

Here, in the process of the sub-arm assembly 240 and the main arm assembly 230 being brought into close contact with each other, the sub-arms 251 of the sub-arm assembly 240 are moved by the force applied to the sub-arm assembly 240. 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) applies force to each main arm (231).

Accordingly, the main arms 231 of the main arm assembly 230 are positioned at 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. It descends toward the surface, that is, the -Z axis defined in the drawing, and is completely unfolded to come into 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, with the main arms 231 spread out in all directions forming a certain angle Θ with the bottom surface of the rigid groove (210b in Figure 2b) of the back cover 140, force is applied through the sub-arm assembly 240. As the back cover 140 is fully unfolded to come into close contact with the bottom surface of the rigid groove (210b in Figure 2b), each main arm 231 has the main arms 231 in the rigid groove of the back cover 140 (Figure 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 a certain force (F) is applied to the other end, that is, the end, of each main arm 231 through the elastic force of the main arm 231. do.

At this time, in the process of the main arms 231 of the main arm assembly 230 coming into close contact with the bottom surface of the rigid groove (210b in Figure 2b) of the back cover 140, the sub-arm 251 and the main arm 231 are connected. The force applied to the area (F area) can also be distributed by elastic force, so 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 connection portion (area F) of the main arm 231 and the sub-arm 251, which are assembled and fastened to each other, is not damaged, and a constant force is applied to the ends of each main arm 231.

Therefore, as shown in FIG. 7, when this rigid assembly 200 is placed 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 assemblies 240 come into close contact with each other, a certain force F applied to the ends of each main arm 231 of the main arm assembly 230 is transmitted to each corner of the display device (100 in FIG. 1C).

Here, if we look at this in more detail with reference to FIGS. 8A and 8B, as shown in FIG. 8A, the main arm 251 located in the extension portion 210b of the rigid groove 210 is formed by the sub arms 231. In the process of unfolding to come into close contact with the bottom surface of the rigid groove (210b in FIG. 2B) of the back cover (140 in FIG. 2B) by the applied force, the main arms 231 are shown in FIG. 8B due to 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 with each other occurs between the main arm 231 and the stopper part 213b, and the length difference (L) between the main arm 231 and the stopper part 213b thus generated causes Force (F) is 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, thereby improving the rigidity of the back cover 140.

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

That is, the display device (100 in FIG. 1C) according to an embodiment of the present invention has a rigidity corresponding to the rigidity of the rigid assembly 200 by positioning the rigid assembly 200 on the inner surface of the horizontal portion 141 of the back cover 140. In addition, the rigidity can be improved by an amount corresponding to the elastic force of the main arm 231 of the rigid assembly 200, and the rigidity of the display device (100 in FIG. 1C) can be further improved. It becomes possible.

Therefore, it is possible to prevent damage to the display panel (110 in FIG. 1C) of the display device (100 in FIG. 1C). For example, the display device (100 in FIG. 1C) is damaged by the display panel (110 in FIG. 1C). As the and back cover 140 are attached to each other through an adhesive pad (150 in FIG. 1C), the display panel (110 in FIG. 1C), which has a smaller thermal expansion coefficient than that of the back cover 140, is located concavely relative to the front. Bending deformation may occur, and when bending deformation of the display device (100 in FIG. 1C) occurs, peeling of the display panel (110 in FIG. 1C) and the back cover 140 occurs, causing the display panel (FIG. 110) of 1c may cause damage.

At this time, the display device (100 in FIG. 1C) according to an embodiment of the present invention applies a certain force (F) to the four corners of the back cover 140 through the rigid assembly 200, so the rigidity of the back cover 140 can be improved, thereby improving the overall rigidity of the display device (100 in FIG. 1C).

Therefore, it is possible to prevent bending deformation of the display device (100 in FIG. 1c) from occurring, thereby preventing damage to the display panel (110 in FIG. 1c) due to bending deformation of the display device (100 in FIG. 1c). It can be prevented.

Here, the rigidity of the rigid assembly 200 including each main arm 231 and the sub-arms 251 is preferably formed to be similar to the rigidity of the display device (100 in FIG. 1C). When it is desired to improve the rigidity of the display device (100 in FIG. 1C) through The assembly 200 may undergo bending deformation.

In addition, the main arms 231 are made of metal, polymer, It may be made of polymer composite material, etc., but is not limited thereto.

Meanwhile, the sub-arm assembly 240 not only plays a role in improving the overall rigidity of the rigidity assembly 200 by applying a certain force to the main arm assembly 230, but also moves the main arm assembly 230 in the opposite direction, that is, as defined in the drawing. -A certain force is applied so that the main arm assembly 230 is in close contact with the horizontal portion 141 of the back cover 140 to prevent it from being tilted at a certain angle along the Z axis.

In addition, this rigid assembly 200 is formed to have a thickness that does not protrude outside the rigid groove 210 provided in the back cover 140, so that the adhesive pad (Figure It is desirable to ensure that no separate interference occurs between the display panel (110 in FIG. 1C), which is attached and fixed through 150 in FIG. 1C, and the rigid assembly 200.

Therefore, taking this into consideration, the length and elasticity of the main arm 231 and the location of the connection portion (F area) between the main arm 231 and the sub-arm 251 can be designed.

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

In particular, the display device (100 in FIG. 1C) according to an embodiment of the present invention responds to the rigidity of the rigid assembly 200 by positioning the rigid assembly 200 on the inner surface of the horizontal portion 141 of the back cover 140. Since the rigidity of the back cover 140 can be secondarily improved as much as possible, and a certain force can be applied to the four corners of the back cover 140 by the rigid assembly 200, the back cover 140 The rigidity can be improved three times.

In this way, as the rigidity of the back cover 140 improves, the rigidity of the display device (100 in FIG. 1C) can also be further improved.

Therefore, the display device (100 in FIG. 1C) according to an embodiment of the present invention can maintain high rigidity even if the inner plate that was separately provided to improve rigidity is deleted, and thus can achieve lightweight and thin design while maintaining excellent rigidity, and the inner Process efficiency can also be improved through plate deletion.

The present invention is not limited to the above embodiments, and can be implemented with various changes without departing from the spirit of the present invention.

140: back cover (141: horizontal part)
200: Rigid assembly
210: Rigid groove (210a: central part, 210ㅠ: extension 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 back of the display panel;
A main arm assembly located between the display panel and the back cover and including a plurality of main arms extending to each corner of the back cover, and a plurality of sub-arms each assembled and fastened to the plurality of main arms. A rigid assembly including a sub-arm assembly that
A display device that applies a certain force to each corner through a reaction force of the main arm assembly caused 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 protruding 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 with a protruding hole into which the protruding protrusion is inserted, one end assembled and fastened to the sub-arm fixing holder, and the plurality of main arms. and a plurality of sub-arms including the other end to be fastened.
According to claim 2,
One end of the plurality of main arms is tilted at a certain angle relative to the first plate and can be raised and lowered forward toward the sub-arm assembly and toward the rear opposite the front,
A display device in which the plurality of sub-arms are capable of being raised and lowered in the rear and front directions, respectively, with the one end and the other end facing the main arm assembly.
According to claim 3,
The main arms are assembled and fastened through the first plate and the main arm holder, and the main arms can be raised and lowered by rotating the main arm fixing holder forward and backward,
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 display device is capable of raising and lowering the sub-arms by rotating the first and second sub-arm holders forward and backward.
According to claim 3,
The reaction force is generated by a 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, and the constant angle is defined by the elastic force of the main arm.
According to claim 2,
A display device wherein a rigid groove in which the rigid assembly is located is provided on the inner surface of the horizontal portion of the back cover.
According to claim 6,
The rigid groove is located at the center of the horizontal portion of the back cover and extends from the central portion toward the corners where the main arm fixing holder and the sub arm fixing holder are located, and where the main arm and the sub arm are located. A display device including extension parts located respectively.
According to claim 7,
A display device wherein a stopper is provided at an end of the extension portion corresponding to each corner of the back cover and is in contact with the ends of the plurality of main arms.
According to claim 6,
The depth of the rigid groove corresponds to the thickness of the rigid assembly.
According to claim 1,
A display device in which the back cover is 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 TIM (thermal interface material).
a display panel;
a back cover located on the back of the display panel;
Rigid assembly located between the display panel and the back cover
Includes,
The rigid assembly includes a main arm assembly, one end of which extends to each corner of the back cover, and the other end including a plurality of main arms each mounted on a first plate to be capable of being raised and lowered toward the back cover;
One end is assembled and fastened to the plurality of main arms so as to be able to be raised and lowered respectively toward the plurality of main arms, and the other end is attached to a second plate that is assembled and fastened to the first plate and is respectively raised and lowered toward the first plate. A display device comprising a sub-arm assembly including a plurality of sub-arms that can be mounted, wherein the main arm assembly and the sub-arm assembly are positioned in close contact with each other.
According to claim 12,
A display device wherein the first plate is provided with a protruding protrusion, and the second plate is provided with a protruding groove into which the protruding protrusion is inserted.
According to claim 12,
A display device in which a rigid groove in which the main arm assembly and the sub-arm assembly are located is provided on the inner surface of the back cover, and a stopper that contacts one end of the plurality of main arms is located at an end of the rigid groove.

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