Patent Publication Number: US-2022214577-A1

Title: Display device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This Application is a Continuation of U.S. patent application Ser. No. 16/989,152 filed on Aug. 10, 2020, which is a Continuation of U.S. patent application Ser. No. 16/204,086 filed on Nov. 29, 2018 (now U.S. Pat. No. 10,768,458 issued on Sep. 8, 2020), which claims the priority benefit under 35 U.S.C. § 119(a) to Korean Patent Application No. 10-2018-0034470 filed in the Republic of Korea on Mar. 26, 2018, all of which are hereby expressly incorporated by reference into the present application. 
    
    
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present disclosure relates to a display device. 
     Discussion of the Related Art 
     With the development of the information society, various demands for display devices are increasing. Various display devices, such as liquid crystal displays (LCDs), plasma display panels (PDPs), electroluminescent displays (ELDs), and vacuum fluorescent displays (VFDs), have been recently studied and used in response to the various demands for the display devices. 
     A display device using an organic light emitting diode (OLED) is advantageous in that it has better luminance characteristic and viewing angle characteristic than a liquid crystal display, and has a ultra-thin profile because it does not require a backlight unit unlike the liquid crystal display. 
     Recently, studies have been actively conducted to improve an assembling structure of a display device while securing rigidity of the display device. 
     SUMMARY OF THE INVENTION 
     An object of the present disclosure is to address the above-described and other problems. Another object of the present disclosure is to provide a display device capable of improving constraints of a structural design. 
     Another object of the present disclosure is to provide a display device in which a display panel is coupled to a front cover. 
     Another object of the present disclosure is to provide a display device in which an optical sheet is coupled to a front cover. 
     Another object of the present disclosure is to provide a display device in which a frame is coupled to a front cover. 
     Another object of the present disclosure is to provide a display device in which a back cover is coupled to a front cover. 
     Another object of the present disclosure is to provide a display device in which a number of components is reduced. 
     Another object of the present disclosure is to provide a display device with a reduced thickness. 
     Another object of the present disclosure is to provide a display device having a structure capable of increasing efficiency of an assembly process. 
     In one aspect of the present disclosure, there is provided a display device comprising: a display panel; a front cover including a front part covering an edge of a front surface of the display panel, a side part extended from the front part and covering a side surface of the display panel, and a guide protruding from the side part and contacting the side surface of the display panel; a frame including a rear part positioned in a rear of the display panel and a supporting part extended from the rear part and supporting a rear surface of the display panel; and a back cover positioned in the rear of the frame and coupled to the side part of the front cover, wherein the side part of the front cover is coupled to the frame. 
     According to another aspect of the present disclosure, the display device may further comprise a pad positioned between the front part and the front surface of the display panel and fixed to the front part. 
     According to another aspect of the present disclosure, the front cover may include a groove formed on the front part and facing the display panel, and the pad may be accommodated in the groove. 
     According to another aspect of the present disclosure, the front part may include a first part including the groove and a second part bent rearward from the first part, and the side part may be extended from the second part. 
     According to another aspect of the present disclosure, the frame may include a first hole facing the front part. The front cover may include a hook portion positioned between the side surface of the display panel and the side part, protruding rearward from the front part, and passing through the first hole. 
     According to another aspect of the present disclosure, the display device may further comprise an optical sheet including a second hole facing the first hole, the optical sheet being positioned between the display panel and the frame. The hook portion may pass through the second hole. 
     According to another aspect of the present disclosure, the display device may further comprise a reflective sheet including a third hole facing the first hole, the reflective sheet being positioned between the display panel and the frame. The hook portion may pass through the third hole. 
     According to another aspect of the present disclosure, the front cover may include a fourth hole formed in the side part. The frame may include a second side part extended rearward from the supporting part, facing the side part of the front cover that is a first side part, and adjacent to the side part and a protrusion protruding from the second side part toward the first side part of the front cover and inserted into the fourth hole. 
     According to another aspect of the present disclosure, the frame may include a fifth hole formed in the supporting part. The front cover may include a rib protruding rearward from the first front part and inserted into the fifth hole. 
     According to another aspect of the present disclosure, the front cover may include a latching jaw protruding from the side part to an outside. The back cover may include a third part facing the frame, a fourth part extended forward from the third part, and a hook protruding from the fourth part to an inside of the fourth part and catching on the latching jaw. 
     According to another aspect of the present disclosure, the front cover may include a second latching jaw protruding from the side part to an inside. The back cover may include a third part facing the frame, a fourth part extended forward from the third part, and a second hook protruding from the fourth part to an inside of the fourth part and catching on the second latching jaw. 
     According to another aspect of the present disclosure, the frame may include an opening formed in the side vertical part. The second latching jaw may be positioned in the opening. 
     According to another aspect of the present disclosure, the second hook may include a fifth part and a sixth part adjacent to the fifth part. The second latching jaw may be caught between the fifth part and the sixth part. 
     According to another aspect of the present disclosure, the fourth part may include a first subpart extended forward from the third part, the first subpart including the second hook, and a second subpart extended forward from the first subpart and covering the side part. 
     According to another aspect of the present disclosure, the display device may further comprise a backlight unit positioned between the display panel and the frame and providing light to the display panel. 
     Effects of a display device according to the present disclosure are described as follows. 
     According to at least one aspect of the present disclosure, a display panel can be coupled to a front cover. 
     According to at least one aspect of the present disclosure, an optical sheet can be coupled to a front cover. 
     According to at least one aspect of the present disclosure, a frame can be coupled to a front cover. 
     According to at least one aspect of the present disclosure, a back cover can be coupled to a front cover. 
     According to at least one aspect of the present disclosure, the number of components can be reduced. 
     According to at least one aspect of the present disclosure, a thickness of a display device can be reduced. 
     According to at least one aspect of the present disclosure, efficiency of an assembly process of a display device can be increased. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, that may be included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain various principles of the disclosure. 
         FIGS. 1 to 30  illustrate examples of configuration of a display device according to an embodiment of the disclosure. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Reference will now be made in detail embodiments of the disclosure examples of which are illustrated in the accompanying drawings. Since the present disclosure may be modified in various ways and may have various forms, specific embodiments are illustrated in the drawings and are described in detail in the present specification. However, it should be understood that the present disclosure is not limited to specific disclosed embodiments, but include all modifications, equivalents and substitutes included within the spirit and technical scope of the present disclosure. 
     The terms ‘first’, ‘second’, etc. may be used to describe various components, but the components are not limited by such terms. The terms are used only for the purpose of distinguishing one component from other components. For example, a first component may be designated as a second component without departing from the scope of the present disclosure. In the same manner, the second component may be designated as the first component. 
     The term “and/or” encompasses both combinations of the plurality of related items disclosed and any item from among the plurality of related items disclosed. 
     When an arbitrary component is described as “being connected to” or “being linked to” another component, this should be understood to mean that still another component(s) may exist between them, although the arbitrary component may be directly connected to, or linked to, the second component. In contrast, when an arbitrary component is described as “being directly connected to” or “being directly linked to” another component, this should be understood to mean that no component exists between them. 
     The terms used in the present application are used to describe only specific embodiments or examples, and are not intended to limit the present disclosure. A singular expression can include a plural expression as long as it does not have an apparently different meaning in context. 
     In the present application, the terms “include” and “have” should be understood to be intended to designate that illustrated features, numbers, steps, operations, components, parts or combinations thereof exist and not to preclude the existence of one or more different features, numbers, steps, operations, components, parts or combinations thereof, or the possibility of the addition thereof. 
     Unless otherwise specified, all of the terms which are used herein, including the technical or scientific terms, have the same meanings as those that are generally understood by a person having ordinary knowledge in the art to which the present disclosure pertains. The terms defined in a generally used dictionary must be understood to have meanings identical to those used in the context of a related art, and are not to be construed to have ideal or excessively formal meanings unless they are obviously specified in the present application. 
     The following exemplary embodiments of the present disclosure are provided to those skilled in the art in order to describe the present disclosure more completely. Accordingly, shapes and sizes of elements shown in the drawings may be exaggerated for clarity. 
     In the following description, wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts, and duplicated description thereof will be omitted. 
     In the following description, if an embodiment is described with reference to a specific figure, reference numbers not shown in the specific figure may be mentioned, if necessary or desired. However, the reference numbers not shown in the specific figure may be mentioned only when the reference numbers are shown in other figures. 
     In general, a suffix such as “module” and “unit” may be used to refer to elements or components. Use of such a suffix herein is merely intended to facilitate description of the specification, and the suffix itself is not intended to give any special meaning or function. 
     It will be noted that a detailed description of known arts will be omitted if it is determined that the detailed description of the known arts can obscure embodiments of the disclosure. 
     Further, terms such as height, length, and width used in embodiments of the disclosure may be interchangeable for convenience of explanation. The terms do not have their meanings or roles that are distinguished from each other. 
     Hereinafter, embodiments of the disclosure will be described using a liquid crystal display panel as an example of a display panel. However, embodiments are not limited thereto. 
     Referring to  FIG. 1 , a display device  100  may include a first long side LS 1 , a second long side LS 2  opposite the first long side LS 1 , a first short side SS 1  adjacent to the first long side LS 1  and the second long side LS 2 , and a second short side SS 2  opposite the first short side SS 1 . 
     The first short side SS 1  may be referred to as a first side area; the second short side SS 2  may be referred to as a second side area opposite the first side area; the first long side LS 1  may be referred to as a third side area which is adjacent to the first side area and the second side area and is positioned between the first side area and the second side area; and the second long side LS 2  may be referred to as a fourth side area which is adjacent to the first side area and the second side area, is positioned between the first side area and the second side area, and is opposite to the third side area. 
     Embodiments of the disclosure describe that lengths of the first and second long sides LS 1  and LS 2  are longer than lengths of the first and second short sides SS 1  and SS 2  for convenience of explanation. However, the lengths of the first and second long sides LS 1  and LS 2  may be equal to or almost equal to the lengths of the first and second short sides SS 1  and SS 2 . 
     A first direction DR 1  may be a direction parallel to the long sides LS 1  and LS 2  of a display panel  110 . A second direction DR 2  may be a direction parallel to the short sides SS 1  and SS 2  of the display panel  110 . A third direction DR 3  may be a direction vertical to the first direction DR 1  and/or the second direction DR 2 . 
     The first direction DR 1  and the second direction DR 2  may be commonly referred to as a horizontal direction. The third direction DR 3  may be referred to as a vertical direction. 
     A side, on which a display device displays an image, may be referred to as a forward direction, a front side, or a front surface. When the display device displays an image, a side at which the image cannot be viewed may be referred to as a rearward direction, a rear side, or a rear surface. When the display device is observed at the forward direction, the front side, or the front surface, the first long side LS 1  may be referred to as an upper side or an upper surface. The second long side LS 2  may be referred to as a lower side or a lower surface. Further, the first short side SS 1  may be referred to as a right side or a right surface, and the second short side SS 2  may be referred to as a left side or a left surface. 
     The first long side LS 1 , the second long side LS 2 , the first short side SS 1 , and the second short side SS 2  may be referred to as edges of the display device  100 . Further, positions where the first long side LS 1 , the second long side LS 2 , the first short side SS 1 , and the second short side SS 2  meet each other may be referred to as corners. For example, a position where the first long side LS 1  and the first short side SS 1  meet each other may be referred to as a first corner Cl, a position where the first long side LS 1  and the second short side SS 2  meet each other may be referred to as a second corner C 2 , a position where the second short side SS 2  and the second long side LS 2  meet each other may be referred to as a third corner C 3 , and a position where the second long side LS 2  and the first short side SS 1  meet each other may be referred to as a fourth corner C 4 . 
     A direction from the first short side SS 1  to the second short side SS 2  or a direction from the second short side SS 2  to the first short side SS 1  may be referred to as a left-right direction LR. A direction from the first long side LS 1  to the second long side LS 2  or a direction from the second long side LS 2  to the first long side LS 1  may be referred to as an up-down direction UD. 
     The X-axis may be parallel to the first direction. The Y-axis may be parallel to the second direction. The Z-axis may be parallel to the third direction. The +X-axis may face the right side, and the −X-axis may face the left side. The +Y-axis may face the upper side, and the −Y-axis may face the lower side. The +Z-axis may face the front side, and the −Z-axis may face the rear side. 
     The display panel  110  may display an image in the forward direction. A front cover  140  may be fastened to a back cover  150 . The display panel  110  may be positioned between the front cover  140  and the back cover  150 . 
     Referring to  FIG. 2 , the front cover  140  may have a quadrilateral shape. The front cover  140  may be referred to as a front case  140 . The front cover  140  may include an opening  140   a.  The opening  140   a  may have a quadrilateral shape. The front cover  140  may include a horizontal part  140 H and a vertical part  140 V. The horizontal part  140 H may include a first horizontal part  140 H 1  and a second horizontal part  140 H 2 . The first horizontal part  140 H 1  and the second horizontal part  140 H 2  may be connected obliquely. 
     Referring to  FIGS. 3 and 4 , a pad  140   b  may be positioned on a rear surface of the first horizontal part  140 H 1 . The pad  140   b  may be formed along the perimeter of the front cover  140 . The pad  140   b  may be adjacent to or in contact with a front surface of the display panel  110 . The first horizontal part  140 H 1  may include a groove  140   c,  and the pad  140   b  may be positioned in the groove  140   c.  A protrusion  141  may protrude from the vertical part  140 V. The protrusion  141  may be referred to as a guide  141  or a panel guide  141 . The plurality of protrusions  141  may be formed along the perimeter of the front cover  140 . The protrusion  141  may be formed in a corner area of the front cover  140 . The protrusion  141  may be adjacent to or in contact with the side of the display panel  110 . A hole  143  may be formed in the vertical part  140 V. The hole  143  may be referred to as a coupling hole  143 , a coupling portion  143 , or a fastening portion  143 . The plurality of holes  143  may be formed along the perimeter of the front cover  140 . The hole  143  may be formed in the corner area of the front cover  140 . 
     Referring to  FIGS. 3 and 5 , a protrusion  142  may protrude from the first horizontal part  140 H 1 . The protrusion  142  may be referred to as a hook portion  142 , a latching portion  142 , a hook  142 , or a coupling portion  142 . The plurality of protrusions  142  may be formed along the perimeter of the front cover  140 . 
     Referring to  FIGS. 3 and 6 , a protrusion  144  may protrude from the first horizontal part  140 H 1  or the vertical part  140 V. The protrusion  144  may be referred to as a guide  144  or a rib  144 . A protrusion  145  may protrude from a corner area formed by the first horizontal part  140 H 1  and the vertical part  140 V. The plurality of protrusions  145  may be formed along the perimeter of the front cover  140 . The protrusion  145  may protrude from the vertical part  140 V. The protrusion  145  may be referred to as a coupling portion  145 , a fastening portion  145 , or a coupling protrusion  145 . The plurality of protrusions  145  may be formed along the perimeter of the front cover  140 . 
     Referring to  FIGS. 3 and 7 , a groove  146   a  may be formed on an outer surface of the vertical part  140 V. The groove  146   a  may be referred to as a stepped portion  146   a.  A protrusion  146   b  may protrude from the groove  146   a.  The groove  146   a  and the protrusion  146   b  may be collectively referred to as a latching portion  146 , a protrusion  146 , a coupling portion  146 , a hook  146 , a latching jaw  146 , or a fastening portion  146 . The plurality of latching portions  146  may be formed along the perimeter of the front cover  140 . 
     Referring to  FIG. 8 , the display panel  110  may be coupled to the front cover  140 . The display panel  110  may be positioned in the rear of the front cover  140 . The display panel  110  may be provided on the front surface of the display device  100  and can display an image. The display panel  110  can display an image by outputting red, green, and blue light from each of a plurality of pixels at proper timing. The display panel  110  may be divided into an active area on which an image is displayed, and a de-active area on which the image is not displayed. The display panel  110  may include a front substrate and a rear substrate that are positioned opposite each other with a liquid crystal layer interposed therebetween. 
     The front substrate may include the plurality of pixels each including red, green, and blue subpixels. The front substrate may output light corresponding to red, green, or blue color in response to a control signal. 
     The rear substrate may include switching elements. The rear substrate may switch on and off pixel electrodes. For example, the pixel electrodes may change a molecule arrangement of the liquid crystal layer in response to a control signal received from the outside. The liquid crystal layer may include liquid crystal molecules. The arrangement of the liquid crystal molecules may be changed corresponding to a voltage difference between the pixel electrode and a common electrode. The liquid crystal layer may transfer light provided by a light source  124  (see  FIG. 17 ) to the front substrate, or may shield the light. 
     Referring to  FIG. 9 , a front surface of the display panel  110  may face the first horizontal part  140 H 1 . The guide  141  may be adjacent to or in contact with the side surface of the display panel  110 . The guide  141  may be adjacent to or in contact with a corner area of the display panel  110 . The guide  141  may align or guide a location of the display panel  110 . 
     Referring to  FIG. 10 , an optical sheet  125  may be coupled to the front cover  140 . The optical sheet  125  may be referred to as a composite sheet  125 . The optical sheet  125  may include a flat portion  125   a  having a quadrilateral shape and an ear  125   b  coupled to the flat portion  125   a.  The plurality of ears  125   b  may be formed along the perimeter of the flat portion  125   a.  The ear  125   b  may include a hole  125   c.  The optical sheet  125  can diffuse light emitted from the light source  124  (see  FIG. 17 ). The optical sheet  125  can refract or concentrate light emitted from the light source  124 . The optical sheet  125  can simultaneously perform a function of a diffusion sheet and a function of a prism sheet. 
     Referring to  FIG. 11 , the hook portion  142  may pass through the hole  125   c.  The ear  125   b  may be formed at a location corresponding to the hook portion  142 . The optical sheet  125  can be coupled to the front cover  140  by catching on the hook portion  142 . The optical sheet  125  may face the rear surface of the display panel  110 . 
     Referring to  FIGS. 12 and 13 , a frame  130  may include a flat portion  130 P, an inclined portion  130 I, a horizontal portion  130 H, or a vertical portion  130 V. The flat portion  130 P may have a quadrilateral shape. The inclined portion  130 I may be extended forward at the perimeter of the flat portion  130 P. The inclined portion  130 I may be obliquely coupled to the flat portion  130 P. The horizontal portion  130 H may be extended from the inclined portion  130 I. The horizontal portion  130 H may be parallel to the flat portion  130 P. The vertical portion  130 V may be extended rearward from the horizontal portion  130 H. The vertical portion  130 V and the horizontal portion  130 H may be perpendicular to each other. The horizontal portion  130 H may include an ear  131   a.  The plurality of ears  131   a  may be formed along a lower side of the frame  130 . The ear  131   a  may include a hole  132 . The hole  132  may be formed in the horizontal portion  130 H. The plurality of holes  132  may be formed along the perimeter of the frame  130 . The flat portion  130 P may include a protrusion  136  protruding forward. The protrusion  136  may be referred to as a projection  136  or a guide  136 . The plurality of protrusions  136  may be formed. An electronic substrate for driving the display device  100  may be fastened to a rear surface of the frame  130 . 
     Referring to  FIGS. 12 and 14 , the frame  130  may include a hole  134 . The hole  134  may be formed in the horizontal portion  130 H or the vertical portion  130 V. The hole  134  may be formed in a corner area formed by the horizontal portion  130 H and the vertical portion  130 V. The hole  134  may be formed over the horizontal portion  130 H and the vertical portion  130 V. The plurality of holes  134  may be formed along the perimeter of the frame  130 . 
     Referring to  FIGS. 12 and 15 , the frame  130  may include a hole  135 . The hole  135  may be referred to as an opening  135 , an indentation  135  or a depression  135 . The hole  135  may partition the vertical portion  130 V. The hole  135  may be opened rearward. The hole  135  may be formed in the horizontal portion  130 H or the vertical portion  130 V. The hole  135  may be formed in a corner area formed by the horizontal portion  130 H and the vertical portion  130 V. The hole  135  may be formed over the horizontal portion  130 H and the vertical portion  130 V. The plurality of holes  135  may be formed along the perimeter of the frame  130 . 
     Referring to  FIGS. 12 and 16 , a protrusion  133  may be formed in the vertical portion  130 V. The protrusion  133  may be referred to as a coupling portion  133 , a hook  133 , a latching jaw  133 , or a fastening portion  133 . The protrusion  133  may protrude to the outside of the frame  130 . The protrusion  133  may be formed by pressing the vertical portion  130 V. The plurality of protrusions  133  may be formed along the perimeter of the frame  130 . 
     Referring to  FIG. 17 , the substrate  122  may be fastened to the flat portion  130 P. The substrate  122  may be extended along the long side of the frame  130 . The light source  124  may be mounted on the substrate  122 . The plurality of light sources  124  may be formed along the substrate  122 . The light source  124  may provide light forward. A reflective sheet  126  may include holes  126   c,    126   d,  and  126   e.  The hole  126   c  may be formed at a location corresponding to the light source  124 . The hole  126   e  may be formed at a location corresponding to the protrusion  136 . The hole  126   d  may be formed at a location corresponding to a pin  127  (see  FIG. 18 ). The reflective sheet  126  can reflect forward the light emitted from the light source  124 . The reflective sheet  126  may include at least one of metal and metal oxide which are a reflective material. The reflective sheet  126  may include metal and/or metal oxide having a high reflectance, for example, at least one of aluminum (Al), silver (Ag), gold (Au), and titanium dioxide (TiO 2 ). 
     The reflective sheet  126  may be formed by depositing and/or coating the metal or the metal oxide. An ink including a metal material may be printed on the reflective sheet  126 . A deposition layer may be formed on the reflective sheet  126  using a thermal deposition method, an evaporation method, or a vacuum deposition method such as a sputtering method. A coating layer and/or a printing layer may be formed on the reflective sheet  126  using a printing method, a gravure coating method, or a silk screen method. 
     Referring to  FIG. 18 , the reflective sheet  126  may be coupled to the frame  130 . The reflective sheet  126  may include a flat portion  126 P, an inclined portion  126 I, a horizontal portion  126 H, or a vertical portion  126 V. The flat portion  126 P may have a quadrilateral shape. The inclined portion  126 I may be extended forward at the perimeter of the flat portion  126 P. The inclined portion  126 I may be obliquely coupled to the flat portion  126 P. The horizontal portion  126 H may be extended from the inclined portion  126 I. The horizontal portion  126 H may be parallel to the flat portion  126 P. The vertical portion  126 V may be extended rearward from the horizontal portion  126 H. The vertical portion  126 V and the horizontal portion  126 H may be perpendicular to each other. The horizontal portion  126 H may include an ear  126   a.  The plurality of ears  126   a  may be formed along a lower side of the reflective sheet  126 . The ear  126   a  may include a hole  126   b.  The protrusion  136  may pass through the reflective sheet  126 . The protrusion  136  can guide a location of the reflective sheet  126 . The pin  127  may be fastened to the frame  130 . The pin  127  may fix the reflective sheet  126  to the frame  130 . The holes  126   b  and  132  may face each other. The reflective sheet  126  can reflect forward light emitted from the light source  124 . 
     Referring to  FIG. 19 , the frame  130  may be fastened to the front cover  140 . The frame  130  may be fastened to the front cover  140  in a state where the frame  130  is fastened to the substrate  122 , the light source  124 , or the reflective sheet  126 . The frame  130  may be positioned in the rear of the front cover  140 . 
     Referring to  FIGS. 20 and 21 , the vertical portions  140 V and  130 V may be adjacent to or in contact with each other. The protrusion  145  may be located in the hole  135 . 
     Referring to  FIGS. 20 and 22 , the rib  144  may be inserted into the hole  134 . A position of the frame  130  can be guided by inserting the rib  144  into the hole  134 . 
     Referring to  FIGS. 20 and 23 , the protrusion  133  may be inserted into the hole  143 . The frame  130  can be fastened to the front cover  140  by inserting the protrusion  133  into the hole  143 . 
     Referring to  FIGS. 24 and 25 , the hook portion  142  may face the side surface of the display panel  110 . The hook portion  142  may pass through the optical sheet  125 , the reflective sheet  126 , or the frame  130 . The hook portion  142  may pass through the holes  125 a,  126   b,  and  132 . The display panel  110  may be positioned between the pad  140   b  and the optical sheet  125 . The frame  130  may be fastened to the front cover  140 . The protrusion  133  may be inserted into the hole  143 . The pad  140   b,  the display panel  110 , the optical sheet  125 , and the reflective sheet  126  can be pressurized by fastening the frame  130  to the front cover  140 . The pad  140   b,  the display panel  110 , the optical sheet  125 , and the reflective sheet  126  may be fixed between the frame  130  and the front cover  140 . 
     Referring to  FIG. 26 , the back cover  150  may include a flat portion  150 P, an inclined portion  150 I, or a vertical portion  150 V. The flat portion  150 P may have a quadrilateral shape. The inclined portion  150 I may be extended forward from an upper side or a side of the flat portion  150 P. The inclined portion  150 I may be obliquely coupled to the flat portion  150 P. The vertical portion  150 V may be extended forward from the inclined portion  150 I. The vertical portion  150 V may be extended forward at a lower side of the flat portion  150 P. A coupling portion  155  may be formed on the inclined portion  150 I. The coupling portion  155  may be referred to as a fastening portion  155 . The coupling portion  155  may include a first part  155   a  and a second part  155   b.  The first part  155   a  and the second part  155   b  may be adjacent to each other. The first part  155   a  and the second part  155   b  may have a hook shape. The plurality of coupling portions  155  may be formed along the inclined portion  155 I. A protrusion  156  may protrude inward from the vertical portion  155 V. The protrusion  156  may be referred to as a coupling portion  156 , a fastening portion  156 , a latching jaw  156 , a latching portion  156 , or a hook  156 . The plurality of protrusions  156  may be formed along the vertical portion  150 V. 
     Referring to  FIG. 27 , the back cover  150  may be fastened to the front cover  140 . The back cover  150  may be positioned in the rear of the front cover  140 . The display panel  110 , the optical sheet  125 , the reflective sheet  126 , and the frame  130  may be positioned between the back cover  150  and the front cover  140 . 
     Referring to  FIG. 28 , the back cover  150  may be fastened to the front cover  140 . The back cover  150  may include a port, a power input port, etc. for being connected to an external device on its back surface. 
     Referring to  FIG. 29 , the protrusions  146   b  and  156  may be engaged with each other. The second horizontal part  140 H 2  and the protrusion  146   b  can fix the vertical part  150 V. The back cover  150  can be fastened to the front cover  140  by engaging the protrusions  146   b  and  156  with each other. 
     Referring to  FIG. 30 , the coupling portion  155  may be engaged with the protrusion  145 . The protrusion  145  may be positioned between the first part  155   a  and the second part  155   b.  The back cover  150  can be fastened to the front cover  140  by engaging the coupling portion  155  with the protrusion  145 . 
     The optical sheet  125 , the substrate  122 , and the light source  124  may be collectively referred to as a backlight unit. The backlight unit may include at least one of an optical sheet, a substrate, a light source, and a light guide plate. The light source may be a direct type light source or an edge type light source. The backlight unit can provide light to the display panel  110 . The backlight unit may be driven in an entire driving method or a partial driving method, such as a local dimming method and an impulsive driving method. 
     The number of components of the display device  100  can be reduced by coupling the display panel  110 , the optical sheet  125 , the frame  130 , the back cover  150 , etc. to the front cover  140 . For example, the front cover  140  may replace a function of a guide panel. In addition, a thickness of the display device  100  can be reduced by reducing the number of components of the display device  100 . 
     The assembly process efficiency of the display device  100  can be increased by coupling the display panel  110 , the optical sheet  125 , the frame  130 , the back cover  150 , etc. to the front cover  140 . For example, the assembly process can be simplified and the assembly process speed can be increased by disposing the front cover  140  at the bottom and stacking the other components on the front cover  140 . 
     The foregoing embodiments are merely examples and are not to be considered as limiting the present disclosure. The present teachings can be readily applied to other types of methods and apparatuses. The features, structures, methods, and other characteristics of the embodiments described herein may be combined in various ways to obtain additional and/or alternative embodiments. 
     Certain embodiments or other embodiments of the disclosure described above are not mutually exclusive or distinct from each other. Any or all elements of embodiments of the disclosure described above may be combined or combined with each other in configuration or function. 
     For example, a configuration “A” described in one embodiment of the disclosure and the drawings and a configuration “B” described in another embodiment of the disclosure and the drawings may be combined with each other. Namely, although the combination between the configurations is not directly described, the combination is possible except in the case where it is described that the combination is impossible. 
     Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.