Patent Publication Number: US-11380224-B2

Title: Display apparatus and disassembling method thereof

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is based on and claims priority under 35 U.S.C. § 119 to U.S. Patent Application No. 62/721,785, filed on Aug. 23, 2018 in the U.S. Patent and Trademark Office, and Korean Patent Application No. 10-2018-0134505, filed on Nov. 5, 2018 in the Korean Intellectual Property Office, the disclosures of which are incorporated by reference herein in its entirety. 
    
    
     BACKGROUND 
     1. Field 
     The present disclosure relates to a display apparatus and a disassembling method thereof, and more particularly, to a display apparatus having an improved structure that can be easily disassembled upon repair or inspection, and a method of disassembling the display apparatus. 
     2. Description of the Related Art 
     A display apparatus is a kind of output apparatus that visually displays images and data information, such as characters, figures, etc. Recently, needs for high brightness, high resolution, a large-screen, high efficiency, and low power of display apparatuses are increasing more and more. Accordingly, as a new display apparatus which will replace the Light Crystal Display (LCD) panel, an Organic Light Emitting Diode (OLED) panel is spotlighted. However, the OLED panel still has many problems that have to be solved, such as high price due to low yield, securing reliability according to enlargement, and securing durability against external environmental conditions such as water. 
     As a new product that can replace or complement the LCD and OLED panels, a panel manufactured by mounting inorganic light emitting devices of emitting light of Red (R), Green (G), and Blue (B) colors directly on a board is being studied. 
     When a display apparatus installed on an installation surface needs to be disassembled by reason of inspection or repair, a work of separating the display apparatus from the installation surface should be first performed. However, when the display apparatus is separated from the installation surface or when the display apparatus is disassembled for inspection or repair, the display apparatus may be damaged. 
     SUMMARY 
     Therefore, it is an aspect of the present disclosure to provide a display apparatus having an improved structure that can be disassembled for inspection or repair in the state of not being separated from an installation surface, and a method of disassembling the display apparatus. 
     It is another aspect of the present disclosure to provide a display apparatus having an improved structure that can be prevented from being damaged upon disassembly, and a method of disassembling the display apparatus. 
     Additional aspects of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure. 
     In accordance with an aspect of the present disclosure, there is provided a display apparatus including: a main frame; a magnet movably positioned on the main frame; and a light emitting diode (LED) module assembly detachably positioned on the main frame, wherein the LED module assembly includes: a plurality of LED modules; and a support frame on which the plurality of LED modules are installed, the support frame including a magnetic material interacting with the magnet. The display apparatus may further include: a power cable configured to supply power to the plurality of LED modules; and a cover installed in the main frame to facilitate a connection of the power cable. 
     When the magnet moves towards the magnetic material to be coupled with the magnetic material, the LED module assembly may be coupled with the main frame, and when the magnet moves away from the magnetic material to be separated from the magnetic material, the LED module assembly may be separated from the main frame. 
     The main frame may be provided with a magnet accommodating boss which extends toward the LED module assembly and in which the magnet is movably accommodated. 
     The LED module assembly may further include a coupling member configured to couple the plurality of LED modules with the support frame. 
     The plurality of LED modules may include a protrusion formed on one surfaces of the plurality of LED modules facing the support frame. 
     The support frame may include an insertion hole in which the protrusion is inserted. 
     A thread may be formed in an inner circumferential surface of the insertion hole. 
     In accordance with another aspect of the present disclosure, there is provided a method of disassembling a display apparatus, the display apparatus including a main frame and a LED module assembly positioned on the main frame, the method including: bringing a magnet member having ferromagnetism close to the LED module assembly fixed on the main frame by coupling between a magnet positioned on the main frame and a magnetic material positioned on the LED module assembly to move the magnet positioned on the main frame away from the magnetic material positioned on the LED module assembly; separating the LED module assembly from the main frame when the magnetic material positioned on the LED module assembly moves away from the magnet positioned on the main frame; and separating the separated LED module assembly to a plurality of LED modules and a support frame. 
     The separating of the LED module assembly may include separating the plurality of LED modules coupled with a front surface of the support frame by a coupling member from the support frame. 
     The separating of the LED module assembly may include: locating the LED module assembly separated from the main frame such that a rear surface of the support frame is shown; and pressing a protrusion of the plurality of LED modules, the protrusion inserted in an insertion hole of the support frame, from the rear surface of the support frame, by using a pressing device. 
     The pressing of the protrusion of the plurality of LED modules by using the pressing device may include rotating the pressing device in the state in which a first thread of the pressing device is engaged with a second thread formed in an inner circumferential surface of the insertion hole to thereby press the protrusion of the plurality of LED modules. 
     The method may further include separating a cover from the main frame to access a power cable positioned behind the main frame to supply power to the LED module assembly. 
     The separating of the cover from the main frame may include pressing an operating portion formed in one side of the cover in an inward direction of the cover to separate the cover from a locking portion formed in the main frame. 
     The separating of the cover from the main frame may further include separating the other side of the cover from a holding portion formed in the main frame to completely separate the cover from the main frame. 
     In accordance with another aspect of the present disclosure, there is provided a method of disassembling a display apparatus, the display apparatus including a first unit including a first main frame and a plurality of first LED module assemblies positioned on the first main frame and a plurality of second units including a second main frame and a plurality of second LED module assemblies positioned on the second main frame, wherein the plurality of second units neighbor the first unit, the method including: securing a gap between each of a first LED module assembly that is to be separated among the plurality of first LED module assemblies, another first LED module assembly neighboring the first LED module assembly that is to be separated among the plurality of first LED module assemblies, and the plurality of second LED module assemblies; locating a protection cover in the gap to surround at least one part of the first LED module assembly that is to be separated; and separating the first LED module assembly that is to be separated, from the first main frame. 
     The locating of the protection cover in the gap may include detachably coupling the protection cover with the plurality of second LED module assemblies and the other first LED module assembly neighboring at least one part of the first LED module assembly that is to be separated. 
     The locating of the protection cover in the gap may include coupling the protection cover with the plurality of second LED module assemblies and the other first LED module assembly neighboring at least one part of the first LED module assembly that is to be separated, by using a magnetic force. 
     Each of the plurality of first LED module assemblies and the plurality of second LED module assemblies may include a protrusion, wherein the coupling of the protection cover with the plurality of second LED module assemblies and the other first LED module assembly neighboring the at least one part of the first LED module assembly that is to be separated may include coupling a magnet of the protection cover with the protrusion of the other first LED module assembly and coupling the magnet of the protection cover with the protrusion of the plurality of second LED module assemblies to couple the protection cover with the other first LED module assembly and the plurality of second LED module assemblies, thereby covering at least one part of the other first LED module assembly and at least one part of the plurality of second LED module assemblies with the protection cover. 
     A magnet may be positioned on the first main frame, a magnetic material may be positioned on the plurality of first LED module assemblies, and the method may further include bringing a magnet member having ferromagnetism close to the first LED module assembly that is to be separated to move the magnet positioned on the first main frame away from the magnetic material positioned on the first LED module assembly that is to be separated. 
     In an embodiment of the present disclosure, a display apparatus comprises a main frame, a magnet movably positioned on the main frame, and a light emitting diode (LED) module assembly detachably positioned on the main frame. The LED module assembly comprises a plurality of LED modules, and a support frame on which the plurality of LED modules are installed, the support frame comprising a magnetic material interacting with the magnet. The display apparatus further comprises a power cable configured to supply power to the plurality of LED modules, and a cover installed in the main frame to facilitate a connection of the power cable. 
     In an embodiment of the present disclosure, a method is provided for disassembling a display apparatus, the display apparatus including a main frame and a LED module assembly positioned on the main frame by a magnet positioned on the main frame being magnetically coupled with a magnetic material positioned on the LED module assembly. The method comprises bringing a magnet member, having ferromagnetism, close to the LED module assembly fixed on the main frame such that the magnet positioned on the main frame moves away from the magnetic material positioned on the LED module assembly; separating the LED module assembly from the main frame while the magnetic material positioned on the LED module assembly is moved away from the magnet positioned on the main frame; and separating, after the LED module assembly is separated from the main frame, a plurality of LED modules of the LED module assembly from a support frame of the LED module assembly. In an embodiment of the present disclosure, a method is provided for disassembling a display apparatus, the display apparatus including a first unit including a first main frame and a plurality of first LED module assemblies positioned on the first main frame, and the display apparatus further including a plurality of second units, each second unit in the plurality of second units including a second main frame and a plurality of second LED module assemblies positioned on the second main frame, wherein the plurality of second units neighbor the first unit. The method comprises securing a gap between each of a first LED module assembly of the plurality of first LED module assemblies that is to be separated, another first LED module assembly of the plurality of first LED module assemblies neighboring the first LED module assembly that is to be separated, and at least one of the plurality of second LED module assemblies of at least one second unit of the plurality of second units; providing a protection cover in the gap such that the protection cover surrounds at least one part of the first LED module assembly that is to be separated; and separating the first LED module assembly that is to be separated, from the first main frame. 
     In an embodiment of the present disclosure, a display apparatus comprises a main frame, a magnet movably positioned on the main frame, and a light emitting diode (LED) module assembly detachably positioned on the main frame. The LED module assembly comprises a LED module, and a support frame on which the LED module is installed, the support frame including a magnetic material interacting with the magnet. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       These and/or other aspects of the disclosure will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which: 
         FIG. 1  is a perspective view of a display apparatus according to an embodiment of the present disclosure; 
         FIG. 2  is a perspective view of a display apparatus according to an embodiment of the present disclosure, when a Light Emitting Diode (LED) module assembly is separated from a main frame; 
         FIG. 3  is an exploded perspective view of a LED module assembly of a display apparatus according to an embodiment of the present disclosure; 
         FIG. 4  is a rear view of a LED module assembly of a display apparatus according to an embodiment of the present disclosure; 
         FIG. 5A  is a front perspective view of a support frame of a LED module assembly in a display apparatus according to an embodiment of the present disclosure; 
         FIG. 5B  is a rear perspective view of a support frame of a LED module assembly in a display apparatus according to an embodiment of the present disclosure; 
         FIG. 6  is a block diagram for describing a process of disassembling a display apparatus according to an embodiment of the present disclosure to connect or disconnect a power cable of the display apparatus; 
         FIGS. 7A to 7E  show a process of disassembling a display apparatus according to an embodiment of the present disclosure to connect or disconnect a power cable of the display apparatus; 
         FIG. 8  is a block diagram for describing a process of disassembling a display apparatus according to an embodiment of the present disclosure to separate a plurality of LED modules of the display apparatus from a support frame; 
         FIG. 9A  shows a process of disassembling a display apparatus according to an embodiment of the present disclosure to separate a plurality of LED modules of the display apparatus from a support frame; 
         FIG. 9B  is an enlarged view of an area of  FIG. 9A ; 
         FIG. 10  is a block diagram for describing a process of disassembling a display apparatus according to another embodiment of the present disclosure to separate any one of a plurality of LED module assemblies from a main frame; 
         FIG. 11  schematically shows a process of disassembling the display apparatus of  FIG. 10 ; 
         FIG. 12  shows a protection cover used in a process of disassembling the display apparatus of  FIG. 10 ; 
         FIG. 13  shows a coupling structure between the protection cover of  FIG. 12  and a plurality of LED module assemblies neighboring a LED module assembly that is to be separated; 
         FIG. 14  schematically shows a process of separating any one of a plurality of LED module assemblies of a display apparatus according to another embodiment of the present disclosure from a main frame by using a protection cover that is different from the protection cover shown in  FIG. 12 ; and 
         FIG. 15  is an enlarged view of the protection cover shown in  FIG. 14 . 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description, the terms “front end”, “rear end”, “upper portion”, “lower portion”, “upper end”, and “lower end”, when used in this specification, are defined based on the drawings, and the shapes and locations of the corresponding components are not limited by the terms. 
       FIG. 1  is a perspective view of a display apparatus according to an embodiment of the present disclosure. In  FIG. 1 , “X” represents a front-rear direction of the display apparatus, “Y” represents a left-right direction of the display apparatus, and “Z” represents a up-down direction of the display apparatus. 
     As shown in  FIG. 1 , a display apparatus  1 , which is an apparatus for displaying information and data as characters, figures, graphs, images, etc., may be a television (TV), a personal computer (PC), a mobile device, a digital signage, etc. The display apparatus  1  may be installed on a ground by a stand (not shown) or on a wall. 
     The display apparatus  1  may include a main frame  10  (e.g. a cabinet), and a plurality of Light Emitting Diode (LED) module assemblies  20  and  30  installed on the main frame  10 . Each of the plurality of LED module assemblies  20  and  30  may include a support frame  50  positioned on the main frame  10 , and a plurality of LED modules  40 A to  40 L installed on the support frame  50 . More specifically, any one LED module assembly of the plurality of LED module assemblies  20  and  30  may include a plurality of LED modules  40 A to  40 F, and the other LED module assembly of the plurality of LED module assemblies  20  and  30  may include a plurality of LED modules  40 G to  40 L. For example, in an embodiment of the present disclosure, the LED module assembly  20  may include the plurality of LED modules  40 A to  40 F, and the LED module assembly  30  may include the plurality of LED modules  40 G to  40 L. 
     The main frame  10  may form a part of an outer appearance of the display apparatus  1 . The main frame  10  may include a main frame body  11  (see  FIG. 2 ) forming a rear outer appearance of the display apparatus  1 , and an edge portion  12  (see  FIG. 2 ) extending from the main frame body  11  in a front direction of the display apparatus  1 . The plurality of LED modules  40 A to  40 L installed on the support frame  50  may implement a screen of the display apparatus  1 . 
     The plurality of LED modules  40 A to  40 L may be arranged in the form of a M*N matrix in up, down, left, and right directions to be adjacent to each other. In the current embodiment, 12 LED modules  40 A to  40 L may be installed in the form of a 3*4 matrix on the support frame  50 . However, the number and arrangement of the LED modules  40 A to  40 L are not limited to this example, and may change variously. In the current embodiment, the plurality of LED modules  40 A to  40 L may be installed on two support frames  50 . More specifically, a part  40 A to  40 F of the plurality of LED modules  40 A to  40 L may be installed on the support frame  50  of any one LED module assembly of the plurality of LED module assemblies  20  and  30 , and the other part  40 G to  40 L may be installed on the support frame  50  of the other LED module assembly of the plurality of LED module assemblies  20  and  30 . For example, in an embodiment of the present disclosure, the part  40 A to  40 F of the plurality of LED modules  40 A to  40 L may be installed on the support frame  50  of the LED module assembly  20 , and the other part  40 G to  40 L may be installed on the support frame  50  of the LED module assembly  30 . However, the number of the support frames  50  is not limited to this example, and may change variously. 
     An edge portion  52  (see  FIG. 2 ) of each support frame  50  may be positioned on the main frame  10  and exposed to the outside. The edge portion  52  of the support frame  50  may form upper, lower, and side appearances of the display apparatus  1 , together with the edge portion  12  of the main frame  10 . In the current embodiment, the support frame  50  may be positioned on the main frame  10  and exposed to the outside of the display apparatus  1 . However, the support frame  50  may be positioned on the main frame  10  without being exposed to the outside of the display apparatus  1 . 
     The plurality of LED modules  40 A to  40 L may have a flat shape or a curved shape. Also, the curvature of the plurality of LED modules  40 A to  40 L may change. 
       FIG. 2  is a perspective view of a display apparatus according to an embodiment of the present disclosure, when a LED module assembly is separated from a main frame. 
     As shown in  FIG. 2 , the plurality of LED module assemblies  20  and  30  may be separated from the main frame  10 . In other words, the plurality of LED module assemblies  20  and  30  may be detachably coupled with the main frame  10 . 
     The display apparatus  1  may further include a magnet  60  (see  FIG. 7C ) movably positioned on the main frame  10 . The plurality of LED module assemblies  20  and  30  may be detachably coupled with the main frame  10  by a magnetic force (e.g. a magnetically attractive force). More specifically, the plurality of LED module assemblies  20  and  30  may be detachably coupled with the main frame  10  by an interaction between a magnetic material  55  positioned on the plurality of LED module assemblies  20  and  30  and the magnet  60  positioned on the main frame  10 . The magnet  60  positioned on the main frame  10  may be movably accommodated in a magnet accommodating boss  15  of the main frame  10 . More specifically, the magnet  60  may be accommodated in the magnet accommodating boss  15  of the main frame  10  in such a way to be movable in the front-rear direction X of the display apparatus  1 . 
     When the magnet  60  moves towards the magnetic material  55  positioned on the plurality of LED module assemblies  20  and  30  to be coupled with the magnetic material  55 , the plurality of LED module assemblies  20  and  30  may be coupled with the main frame  10 . Meanwhile, when the magnet  60  moves away from the magnetic material  55  positioned on the plurality of LED module assemblies  20  and  30  to be separated from the magnetic material  55 , the plurality of LED module assemblies  20  and  30  may be separated from the main frame  10 . 
     As described from another aspect, when the magnet  60  moves in the front direction of the display apparatus  1  to move close to the magnetic material  55  positioned on the plurality of LED module assemblies  20  and  30 , the plurality of LED module assemblies  20  and  30  may be coupled with the main frame  10 . Meanwhile, when the magnet  60  moves in a rear direction of the display apparatus  1  to move away from the magnetic material  55  positioned on the plurality of LED module assemblies  20  and  30 , the plurality of LED module assemblies  20  and  30  may be separated from the main frame  10 . 
     In the main frame  10 , the magnet accommodating boss  15  may be provided. In an embodiment, in the main frame  10 , a plurality of magnetic accommodating bosses  15  may be provided. The magnet accommodating bosses  15  may be positioned on the edge portion  12  of the main frame  10  towards the front direction of the display apparatus  1 . Each magnet accommodating boss  15  may extend in the front-rear direction X of the display apparatus  1  such that the magnet  60  can move in the front-rear direction of the display apparatus  1  in the inside of the magnetic accommodating boss  15 . In other words, the magnet accommodating boss  15  may extend towards the LED module assemblies  20  and  30  with a predetermined length in the front-rear direction X of the display apparatus  1 . The magnet accommodating boss  15  may be installed on the edge portion  12  of the main frame  10 , as a component that is separated from the main frame  10 . However, the magnet accommodating boss  15  may be integrated into the main frame  10 . When the magnet accommodating boss  15  is integrated into the main frame  10 , the magnet accommodating boss  15  may extend towards the LED module assemblies  20  and  30  from the edge portion  12  of the main frame  10 . 
     A cover  70  may be detachably coupled with the main frame  10  to facilitate access to a power cable  80 . The cover  70  may be detachably coupled with the main frame body  11  to facilitate an access to the power cable  80  located behind the main frame  10 . The cover  70  will be described in more detail, later. 
     The display apparatus  1  may further include an accommodating space  18  defined by the main frame  10  and the plurality of LED module assemblies  20  and  30  detachably coupled with the main frame  10 . The accommodating space  18  may be formed between the main frame  10  and the plurality of LED module assemblies  20  and  30  detachably coupled with the main frame  10 . 
     The display apparatus  1  may further include a control board  90  for driving the plurality of LED modules  40 A to  40 L. The control board  90  may be positioned in the accommodating space  18 . When the control board  90  needs to be repaired or inspected, a repairer or inspector may easily access the control board  90  by separating the plurality of LED module assemblies  20  and  30  from the main frame  10  without having to disassemble the entire of the display apparatus  1 . 
       FIG. 3  is an exploded perspective view of a LED module assembly of a display apparatus according to an embodiment of the present disclosure,  FIG. 4  is a rear view of a LED module assembly of a display apparatus according to an embodiment of the present disclosure,  FIG. 5A  is a front perspective view of a support frame of a LED module assembly in a display apparatus according to an embodiment of the present disclosure, and  FIG. 5B  is a rear perspective view of a support frame of a LED module assembly in a display apparatus according to an embodiment of the present disclosure. 
     As shown in  FIGS. 3 to 5B , the plurality of LED modules  40 A to  40 F may be installed on the LED module assembly  20 , and the plurality of LED module assembly  20  may include the support frame  50  including the magnetic material  55  that interacts with the magnet  60  accommodated in the inside of the magnet accommodating boss  15 . It is understood, based on  FIGS. 3 to 5B , that the plurality of LED modules  40 A to  40 L may be installed on the plurality of LED module assemblies  20  and  30 , and each of the plurality of LED module assemblies  20  and  30  may include the support frame  50  including the magnetic material  55  that interacts with the magnet  60  accommodated in the inside of the magnet accommodating boss  15 . 
     Each of the plurality of LED module assemblies  20  and  30  may further include a coupling member  100  for coupling the plurality of LED modules  40 A to  40 L with the support frame  50 . According to an example, the coupling member  100  may be a double-sided tape. However, the coupling member  100  is not limited to a double-sided tape. The coupling member  100  may be positioned between the plurality of LED modules  40 A to  40 L and the support frame  50  to couple the plurality of LED modules  40 A to  40 L with the support frame  50 . 
     Each of the plurality of LED modules  40 A to  40 L may include a first surface  41  (see  FIG. 2 ) forming a screen of the display apparatus  1 , and a second surface  42  that is opposite to the first surface  41  and faces the support frame  50 . 
     The plurality of LED modules  40 A to  40 L may further include a protrusion  45  formed on one surface of the plurality of LED modules  40 A to  40 L facing the support frame  50 . In other words, the plurality of LED modules  40 A to  40 L may include the protrusion  45  formed on the second surface  42  of the plurality of LED modules  40 A to  40 L. The protrusion  45  may be formed on the second surface  42  of at least one of the plurality of LED modules  40 A to  40 L. The protrusion  45  of the plurality of LED modules  40 A to  40 L may be inserted in an insertion hole  56  of the support frame  50 . For example, the protrusion  45  may be made of metal. For example, six protrusions  45  may be formed on one surface of each LED module  40 A to  40 L. However, the number of the protrusions  45  is not limited to the example, and may change variously. 
     The plurality of LED modules  40 A to  40 L may be electrically connected to the control board  90 . The plurality of LED modules  40 A to  40 L may further include a connector  47  formed on the second surfaces  42  to be electrically connected to the control board  90 . 
     The support frame  50  may include a support frame body  51 , and the edge portion  52  extending from the support frame body  51  towards the rear direction of the display apparatus  1 . The support frame  50  may include a first surface  53  facing the plurality of LED modules  40 A to  40 L, and a second surface  54  that is opposite to the first surface  53  and faces the main frame body  11 . The plurality of LED modules  40 A to  40 L may be bonded or coupled on the first surface  53  of the support frame  50  by the coupling member  100 . The first surface  53  of the support frame  50  may be a front surface of the support frame  50 . 
     The support frame  50  may further include a magnetic material coupling portion  58  with which the magnetic material  55  is coupled. The magnetic material  55  may be coupled with the magnetic material coupling portion  58  of the support frame  50 . In an embodiment of the present disclosure, the magnetic material coupling portion  58  may be formed at a corner of the support frame  50 . The magnetic material  55  may be coupled with the magnetic material coupling portion  58  such that one end of the magnetic material  55  faces the plurality of LED modules  40 A to  40 L and the other end of the magnetic material  55  interacts with the magnet  60  positioned on the main frame  10 . 
     The support frame  50  may further include the insertion hole  56  in which the protrusion  45  of the plurality of LED modules  40 A to  40 L is inserted. The insertion hole  56  may be formed in the support frame body  51 . In an inner circumferential surface of the insertion hole  56 , a thread  56   a  (see  FIG. 9B ) may be formed. The number and location of the insertion hole  56  may correspond to the number and location of the protrusion  45 . 
     The display apparatus  1  may further include a power cable  80  (see  FIG. 7C ) for supplying power to the plurality of LED modules  40 A to  40 L. The power cable  80  may be connected to a power supply (not shown) to supply power to the plurality of LED modules  40 A to  40 L. The power cable  80  may be located behind the display apparatus  1 . In other words, the power cable  80  may be located behind the main frame  10 . 
     The display apparatus  1  may further include the cover  70  (see  FIG. 2 ) installed in the main frame  10  to facilitate a connection of the power cable  10 . The cover  70  may be detachably installed in the main frame  10 . In the main frame body  11 , an opening  11   a  (see  FIG. 7D ) may be formed to correspond to the power cable  80 , and the cover  70  may be installed in the main frame body  11  to open or close the opening  11   a . The cover  70  may include an operating portion  71  (see  FIG. 7E ) and a coupling groove  72  (see  FIG. 7E ). More specifically, the operating portion  71  may be formed on one side of the cover  70  in such a way to be elastically deformable, and the coupling groove  72  may be formed on the other side of the cover  70 . In the main frame body  11  in which the cover  70  is installed, a locking portion  11   b  (see  FIG. 7E ) interacting with the operating portion  71  of the cover  70 , and a holding portion  11   c  (see  FIG. 7E ) coupled with the coupling groove  72  of the cover  70  to hold the cover  70  may be formed. The cover  70  may be completely separated from the main frame body  11 . When the operating portion  71  of the cover  70  is engaged with the locking portion  11   b  of the main frame body  11 , and the holding portion  11   c  of the main frame body  11  is coupled with the coupling groove  72  of the cover  70  to hold the cover  70 , the opening  11   a  of the main frame body  11  may be maintained in a closed state by the cover  70 . When the operating portion  71  of the cover  70  is pressed in an inward direction of the cover  70  to be spaced from the locking portion  11   b  of the main frame body  11 , and the holding portion  11   c  of the main frame body  11  is separated from the coupling groove  72  of the cover  70 , the cover  70  may be separated from the main frame body  11  so that the opening  11   a  of the main frame body  11  may be maintained in an open state. 
     In an embodiment, when an access to a power cable is needed, it may be necessary to separate a display apparatus from an installation surface and then dissemble the display apparatus. However, according to the current embodiment in which the opening  11   a  is formed in the main frame body  11  and the cover  70  for opening or closing the opening  11   a  is provided, access to the power cable  80  is possible without having to separate the display apparatus  1  from the installation surface to disassemble the display apparatus  1 . Also, by forming a slit in the cover  70 , foreign materials may be prevented from entering the accommodating space  18 , and also heat generated from the control board  90 , etc. may be discharged to the outside of the display apparatus  1  through the slit formed in the cover  70 . 
     In the current embodiment, a case in which the cover  70  is completely separated from the main frame body  11  is described. However, the cover  70  may have another structure as long as it can open or close the opening  11   a  to allow an access to the power cable  80 . For example, the cover  70  may be rotatably installed in the main frame body  11  to open or close the opening  11   a.    
       FIG. 6  is a block diagram for describing a process of disassembling a display apparatus according to an embodiment of the present disclosure to connect or disconnect a power cable of the display apparatus, and  FIGS. 7A to 7E  show a process of disassembling a display apparatus according to an embodiment of the present disclosure to connect or disconnect a power cable of the display apparatus. 
     As shown in  FIG. 6 , a method of disassembling a display apparatus may include operation S 1  of bringing a magnet member having ferromagnetism close to LED module assemblies attached to a main frame to move a magnet positioned on the main frame away from a magnetic material positioned on the LED module assemblies. 
     The method of disassembling the display apparatus may further include operation S 2  of separating, when the magnetic material positioned on the LED module assemblies is separated from the magnet positioned on the main frame, the LED module assemblies from the main frame. 
     The method of disassembling the display apparatus may further include operation S 3  of separating a cover from the main frame to access a power cable. Operation S 3  of separating the cover from the main frame may include operation of pressing an operating portion formed in one side of the cover in an inward direction of the cover to separate the cover from a locking portion formed in the main frame. Operation S 3  of separating the cover from the main frame may further include operation of separating the other side of the cover from a holding portion formed in the main frame to completely separate the cover from the main frame. 
     Hereinafter, a process of disassembling the display apparatus  1  will be described with reference to  FIGS. 7A to 7E . 
     As shown in  FIG. 7A , when any one LED module assembly of the plurality of LED module assemblies  20  and  30 , coupled with the main frame  10  by coupling between the magnet  60  positioned on the main frame  10  and the magnetic material  55  positioned on the plurality of LED module assemblies  20  and  30 , is to be separated from the main frame  10 , a magnet member  200  having ferromagnetism may be brought close to the LED module assembly  20 . The magnet member  200  may have stronger magnetism than the magnet  60  positioned on the main frame  10 . When the magnet member  200  is brought close to a location corresponding to the magnetic material  55  positioned on the LED module assembly  20  that is to be separated, a repulsive force may act between the magnet member  200  and the magnet  60  positioned on the main frame  10  so that the magnet  60  may be separated from the magnetic material  55 . That is, the magnet  60  may move towards the rear direction of the display apparatus  1  by the repulsive force acting between the magnet member  200  and the magnet  60 , and accordingly, coupling between the magnetic material  55  and the magnet  60  may be released. 
     Because the coupling between the magnet  60  positioned on the main frame  10  and the magnetic material  55  positioned on the LED module assembly  20  is released, the LED module assembly  20  may be separated from the main frame  10 , as shown in  FIG. 7B . When the LED module assembly  20  is separated from the main frame  10 , as shown in  FIG. 7B , access to the accommodating space  18  is possible so that the control board  90 , etc. located in the accommodating space  18  may be easily repaired or inspected. 
     As shown in  FIG. 7C , the cover  70  may be installed in the main frame body  11  to close the opening  11   a  formed in the main frame body  11 . To access the power cable  80  behind the main frame  10 , the cover  70  may need to be separated from the main frame body  11 . 
     As shown in  FIG. 7D , when the operating portion  71  of the cover  70  is pressed toward the inward direction of the cover  70 , the operating portion  71  of the cover  70  may be separated from the locking portion  11   b  provided in the main frame body  11  so that one side of the cover  70  is separated from the main frame body  11 . When the coupling groove  72  of the cover  70  is decoupled from the holding portion  11   c  provided in the main frame body  11  in the state in which one side of the cover  70  is separated from the main frame body  11 , the cover  70  may be completely separated from the main frame body  11 , as shown in  FIG. 7E . 
     As shown in  FIGS. 7A to 7E , by separating the plurality of LED module assemblies  20  and  30  from the main frame  10  without having to separate the display apparatus  1  from the installation surface to easily access the control board  90  located in the accommodating space  18  and separating the cover  70  from the main frame  10  to easily access the power cable  80 , it may be possible to facilitate a process of inspecting or repairing the display apparatus  1 . In other words, because the display apparatus  1  can be serviced from the front portion in the state in which it is installed on the installation surface, it may be unnecessary to separate the display apparatus  1  from the installation surface to completely disassemble the display apparatus  1  upon servicing of the display apparatus  1 . 
       FIG. 8  is a block diagram for describing a process of disassembling a display apparatus according to an embodiment of the present disclosure to separate a plurality of LED modules of the display apparatus from a support frame, and FIG.  9 A shows a process of disassembling a display apparatus according to an embodiment of the present disclosure to separate a plurality of LED modules of the display apparatus from a support frame.  FIG. 9B  is an enlarged view of an area of  FIG. 9A . 
     As shown in  FIG. 8 , a method of disassembling a display apparatus may include operation T 1  of preparing a LED module assembly separated from a main frame. 
     The method of disassembling the display apparatus may further include operation T 2  of locating the LED module assembly separated from the main frame such that a second surface of a support frame is shown, wherein the second surface of the support frame may be a rear surface of the support frame. 
     The method of disassembling the display apparatus may further include operation T 3  of pressing a protrusion of a plurality of LED modules, which is inserted in an insertion hole of the support frame, at the second surface of the support frame, by using a pressing device. Operation T 3  of pressing the protrusion of the plurality of LED modules by using the pressing device may include operation of rotating the pressing device in the state in which a first thread of the pressing device is engaged with a second thread formed in an inner circumferential surface of the insertion hole to thereby press the protrusion of the plurality of LED modules. Because the plurality of LED modules are coupled with the support frame by a coupling member, the plurality of LED modules may be separated from the support frame by pressing the protrusion of the plurality of LED modules with a greater force than a coupling force of the coupling member by using the pressing device. 
     The method of disassembling the display apparatus may include operation T 4  of separating the plurality of LED modules from the support frame. 
     As shown in  FIGS. 9A and 9B , the LED module assembly  20  separated from the main frame  10  may be located such that the second surface  54  of the support frame  50  is shown. In other words, the LED module assembly  20  separated from the main frame  10  may be turned over such that the second surface  54  of the support frame  50  is shown. A user may press the protrusion  45  of the plurality of LED modules  40 A to  40 L, inserted in the insertion hole  56  of the support frame  50 , by using a pressing device  300 . The pressing device  300  may be a jig. However, the kind of the pressing device  300  is not limited to a jig as long as it can press the protrusion  45  of the plurality of LED modules  40 A to  40 L. The pressing device  300  may include a first thread  310 . In the inner circumferential surface of the insertion hole  56  of the support frame  50 , the second thread  56   a  may be formed to correspond to the first thread  310  of the pressing device  300 . The user may couple the pressing device  300  with the insertion hole  56  of the support frame  50 , and then rotate the pressing device  300  in the state in which the first thread  310  of the pressing device  300  is engaged with the second thread  56   a  of the insertion hole  56 , thereby pressing the protrusion  45  of the plurality of LED modules  40 A to  40 F. The plurality of LED modules  40 A to  40 F may be separated from the support frame  50  by a pressing force of the pressing device  300 . 
       FIG. 10  is a block diagram for describing a process of disassembling a display apparatus according to another embodiment of the present disclosure to separate any one of a plurality of LED module assemblies from a main frame. Hereinafter, the same components as those described above with reference to  FIGS. 1 to 9B  will be assigned the same reference numerals as those assigned to the corresponding components of  FIGS. 1 to 9B . Hereinafter, descriptions overlapping with the above descriptions given with reference to  FIGS. 1 to 9B  will be omitted. 
     As shown in  FIG. 10 , a method of disassembling a display apparatus may include operation P 1  of securing a gap between each of a first LED module assembly that is to be separated among a plurality of first LED module assemblies, another first LED module assembly neighboring the first LED module assembly that is to be separated, among the plurality of first LED module assemblies, and a plurality of second LED module assemblies. 
     The method of disassembling the display apparatus may further include operation P 2  of locating a protection cover in the gap to surround at least one part of the first LED module assembly that is to be separated. Operation P 2  of locating the protection cover in the gap may include operation of detachably coupling the protection cover with the other first LED module assembly neighboring the at least one part of the first LED module assembly that is to be separated, and the plurality of second LED module assemblies. Operation P 2  of locating the protection cover in the gap may include operation of coupling the protection cover with the other first LED module assembly, neighboring the at least one part of the first LED module assembly that is to be separated, and the plurality of second LED module assemblies by using a magnetic force. Operation of coupling the protection cover with the other first LED module assembly, neighboring the at least one part of the first LED module assembly that is to be separated, and the plurality of second LED module assemblies may include operation of coupling a magnet of the protection cover with the protrusion of the other first LED module assembly and coupling the magnet of the protection cover with the protrusion of the plurality of second LED module assemblies to couple the protection cover with the other first LED module assembly and the plurality of second LED module assemblies such that the protection cover covers at least one part of the other first LED module assembly and at least one part of the plurality of second LED module assemblies. 
     The method of dissembling the display apparatus may further include operation of separating the first LED module assembly that is to be separated, from a first main frame. For example, the method of disassembling the display apparatus may include operation P 3  of bringing a magnet member having ferromagnetism close to the first LED module assembly that is to be separated, to move a magnet positioned on the first main frame away from a magnetic material positioned on the first LED module assembly that is to be separated. Also, the method of disassembling the display apparatus may further include operation P 4  of separating, when the magnetic material positioned on the first LED module assembly that is to be separated is separated from the magnet positioned on the first main frame, the first LED module assembly that is to be separated from the first main frame. 
     The method of disassembling the display apparatus may further include operation P 5  of removing the protection cover. The protection cover may be removed from the gap after the first LED module assembly that is to be separated is separated from the first main frame or after the first LED module assembly is separated and then replaced with a new first LED module assembly. 
       FIG. 11  schematically shows a process of disassembling the display apparatus of  FIG. 10 ,  FIG. 12  shows a protection cover used in a process of disassembling the display apparatus of  FIG. 10 , and  FIG. 13  shows a coupling structure between the protection cover of  FIG. 12  and a plurality of LED module assemblies neighboring a LED module assembly that is to be separated. 
     As shown in  FIGS. 11 to 13 , a display apparatus  1   a  may include a plurality of units. The plurality of units may be arranged in the form of a M*N matrix to be adjacent to each other. In the current embodiment, 6 units may be arranged in the form of a 3*2 matrix. However, an arrangement of the plurality of units is not limited the example, and may change variously. 
     Each unit may include a main frame and a plurality of LED module assemblies positioned on the main frame. In the current embodiment, each unit may include a main frame and two LED module assemblies positioned on the main frame. 
     Hereinafter, for convenience of description, the display apparatus  1   a  is assumed to include a first unit  500  and a plurality of second units  600  neighboring the first unit  500 . 
     The first unit  500  may include a first main frame  530  and a plurality of first LED module assemblies  510  and  520  positioned on the first main frame  530 . 
     The second unit  600  may include a second main frame and a plurality of second LED module assemblies  610  and  620  positioned on the second main frame. 
     When the first LED module assembly  520  of the plurality of first LED module assemblies  510  and  520  of the first unit  500  is separated from the first main frame  530 , a protection cover  1000  may be used to prevent the first LED module assembly  520  and LED module assemblies located around the first LED module assembly  520  from being damaged. 
     As shown in  FIGS. 12 and 13 , the protection cover  1000  may include a cavity  1010  and a plurality of edge portions  1020  defining the cavity  1010 . The plurality of edge portions  1020  may be connected to each other. In other words, the plurality of edge portions  1020  may be connected to each other to form a closed loop. The protection cover  1000  may have a shape corresponding to the first LED module assembly  520  that is to be separated. For example, the protection cover  1000  may include the cavity  1010  and four edge portions  1020  defining the cavity  1010 . That is, the protection cover  1000  may be in the shape of a rectangle having the cavity  1010 . The first LED module assembly  520  that is to be separated may be coupled with the cavity  1010  of the protection cover  1000 . More specifically, the first LED module assembly  520  that is to be separated may be coupled with the cavity  1010  of the protection cover  1000  to be positioned in the inside of the cavity  1010  of the protection cover  1000 . The plurality of edge portions  1020  of the protection cover  1000  may cover the plurality of LED module assemblies  510 ,  610 , and  620  neighboring the first LED module assembly  520  that is to be separated. More specifically, the plurality of edge portions  1020  of the protection cover  1000  may cover at least one part of the plurality of LED module assemblies  510 ,  610 , and  620  surrounding the first LED module assembly  520  that is to be separated. 
     The protection cover  1000  may be made of a plastic material. However, a material forming the protection cover  1000  is not limited to plastic, and the protection cover  1000  may be made of another material. 
     The protection cover  1000  may further include a magnet  1030 . The magnet  1030  of the protection cover  1000  may be positioned on a surface of the protection cover  1000 , the surface facing the plurality of LED module assemblies  510 ,  610 , and  620  neighboring the first LED module assembly  520  that is to be separated. Specifically, the magnet  1030  of the protection cover  1000  may be positioned on one surface of the plurality of edge portions  1020 , the surface facing the plurality of LED module assemblies  510 ,  610 , and  620  neighboring the first LED module assembly  520  that is to be separated. More specifically, the protection cover  1000  may further include a plurality of magnet accommodating portions  1040  formed in the plurality of edge portions  1020  such that the magnet  1030  is rested in each magnet accommodating portion  1040 . The magnet  1030  of the protection cover  1000  may be accommodated in each magnet accommodating portion  1040  such that one surface of the magnet  1030  is exposed. The magnet  1030  of the protection cover  1000  may interact with the protrusion  45  provided in the plurality of LED module assemblies  510 ,  610 , and  620  neighboring the first LED module assembly  520  that is to be separated, by a magnetic force. For example, the protrusion  45  may include metal reacting to the magnet  1030 . The magnet  1030  of the protection cover  1000  may be detachably coupled with the protrusion  45  of the plurality of LED module assemblies  510 ,  610 , and  620  neighboring the first LED module assembly  520  that is to be separated, with the plurality of LED modules  40 A to  40 L of the plurality of LED module assemblies  510 ,  610 , and  620  in between. 
     To separate the first LED module assembly  520  among the plurality of first LED module assemblies  510  and  520  of the first unit  500  from the first main frame  530 , a gap between each of the first LED module assembly  520 , the other first LED module assembly  510  neighboring the first LED module assembly  520 , and the plurality of second LED module assemblies  610  and  620  of the second unit  600  may need to be secured. For example, the gap may be about 0.5 mm. To secure the gap, the LED module assemblies  510 ,  610 , and  620  located around the first LED module assembly  520  that is to be separated may be moved to be spaced about 2 mm from the first LED module assembly  520 . 
     After the gap is secured, the protection cover  1000  may be positioned in the gap such that the first LED module assembly  520  that is to be separated is inserted in the cavity  1010  of the protection cover  1000 . At this time, the plurality of edge portions  1020  of the protection cover  1000  may be coupled with the LED module assemblies  510 ,  610 , and  620  located around the first LED module assembly  520  that is to be separated, to cover the LED module assemblies  510 ,  610 , and  620  that may contact the first LED module assembly  520  when the first LED module assembly  520  is separated from the first main frame  530 . As described from another aspect, a part of the protection cover  1000  may be positioned between the first LED module assembly  520  that is to be separated and the LED module assemblies  510 ,  610 , and  620  located around the first LED module assembly  520 , and the other part of the protection cover  1000  may be coupled with the LED module assemblies  510 ,  610 , and  620  located around the first LED module assembly  520  by a magnetic force. 
     The first LED module assembly  520  among the plurality of first LED module assemblies  510  and  520  of the first unit  500  may be separated from the first main frame  530  of the first unit  500  without damaging the neighboring LED module assemblies  510 ,  610 , and  620 , by the protection cover  1000 . 
     The protection cover  1000  may be removed from the neighboring LED module assemblies  510 ,  610 , and  620 , after the separated first LED module assembly  520  is inspected or repaired and then located at its original position or after the first LED module assembly  520  is replaced with a new LED module assembly. 
     After the protection cover  1000  is removed, the plurality of first LED module assemblies  510  and  520  of the first unit  500  and the plurality of second LED module assemblies  610  and  620  of the second unit  600  may be assembled to their original states without making any gap in between. 
       FIG. 14  schematically shows a process of separating any one of a plurality of LED module assemblies of a display apparatus according to another embodiment of the present disclosure from a main frame by using a protection cover that is different from the protection cover shown in  FIG. 12 , and  FIG. 15  is an enlarged view of the protection cover shown in  FIG. 14 . Hereinafter, descriptions overlapping with the above descriptions given with reference to  FIGS. 11 to 13  will be omitted. 
     As shown in  FIGS. 14 and 15 , a protection cover  1000   a  may include two edge portions  1020 . The two edge portions  1020  may be connected to each other. 
     The protection cover  1000   a  according to the current embodiment may be used when the first LED module assembly  520  that is to be separated is located at a corner of the display apparatus  1   a , in other words, when the first LED module assembly  520  that is to be separated neighbors two LED module assemblies  510  and  620 . 
     To separate the first LED module assembly  520  of the plurality of first LED module assemblies  510  and  520  of the first unit  500  from the first main frame  530 , a gap between each of the first LED module assembly  520 , the other first LED module assembly  510  neighboring the first LED module assembly  520 , and the plurality of second LED module assemblies  610  and  620  of the second unit  600  may need to be secured. 
     The protection cover  1000   a  may be put in the gap. At this time, any one of the plurality of edge portions  1020  of the protection cover  1000   a  may be coupled with the other first LED module assembly  510  of the plurality of first LED module assemblies  510  and  520  of the first unit  500  to cover at least one part of the other first LED module assembly  510 , and the other one of the plurality of edge portions  1020  of the protection cover  1000   a  may be coupled with any one LED module assembly of the plurality of LED modules  610  and  620  of the second unit  600  to cover at least one part of the LED module assembly. For example, the protection cover  1000   a  may be coupled with the LED module assembly  620  to cover at least one part of the LED module assembly  620 . The protection cover  1000   a  may be detachably coupled with the plurality of LED module assemblies  510  and  620  located around the first LED module assembly  520  that is to be separated, by a magnetic force. 
     The first LED module assembly  520  among the plurality of first LED module assemblies  510  and  520  of the first unit  500  may be separated from the first main frame  530  of the first unit  500  without damaging the neighboring LED module assemblies  510  and  620 , by the protection cover  1000   a.    
     The protection cover  1000   a  may be removed from the neighboring LED module assemblies  510  and  620 , after the separated first LED module assembly  520  is inspected or repaired and then located at its original position or after the first LED module assembly  520  is replaced with a new LED module assembly. 
     After the protection cover  1000   a  is removed, the plurality of first LED module assemblies  510  and  520  of the first unit  500  and the plurality of second LED module assemblies  610  and  620  of the second unit  600  may be assembled to their original states without making any gap in between. 
     So far, two types of protection covers have been described above, however, the protection cover may change variously. 
     Because coupling between the magnet positioned in the main frame and the magnetic material positioned in the LED module assembly can be released by using the magnet member having ferromagnetism, there is no need to separate the display apparatus from the installation surface and completely disassemble the display apparatus when the control board, etc. positioned in the accommodating space are inspected or repaired. 
     By installing the detachable cover in the main frame, it may be possible to facilitate access to the power cable. 
     By using the removable protection cover when the LED module assembly is separated, it may be possible to prevent the LED module assembly and LED module assemblies located around the LED module assembly from being damaged. 
     Although a few embodiments of the present disclosure have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the claims and their equivalents.