Patent Publication Number: US-2021183837-A1

Title: Display apparatus having display module and method of manufacturing the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is based on and claims priority under 35 U.S.C. § 119 to Korean Patent Applications No. 10-2019-0167071, filed on Dec. 13, 2019 and No. 10-2020-0038840, filed on Mar. 31, 2020 in the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference in their entireties. 
     BACKGROUND 
     1. Field 
     The disclosure relates to a display apparatus for displaying an image by coupling modules each having self-emissive inorganic light emitting diodes mounted on a substrate thereof. 
     2. Description of the Related Art 
     A display apparatus is a type of an output device that visually displays data information, such as characters and figures, images, and the like. 
     In general, for a display apparatus, a liquid crystal panel requiring a backlight, or an Organic Light-Emitting Diode (OLED) panel formed of an organic compound film that emits light by itself in response to an electric current have been mainly used. However, the liquid crystal panel has a slow response time and large power consumption, and requires a backlight due to limitation on emitting light by itself, having a difficulty in providing the display apparatus in a compact size. In contrast, the OLED panel does not require a backlight due to emitting light by itself, and thus achieves slim thickness, but the OLED panel is susceptible to a burn-in phenomenon in which when the same screen is displayed for a long time, a part of the screen remains even when the screen is switched due to the life of sub-pixels being ended. 
     Accordingly, in order to find a replacement for the LCD panel and the OED panel, research has been conducted on a micro light emitting diode (micro LED or μLED) panel that mounts an inorganic light emitting diode on a substrate and uses the inorganic light emitting diode itself as a pixel. 
     Micro light-emitting diode display panel (hereinafter, referred to as a micro LED panel) is one of flat panel display panels and includes a plurality of inorganic light-emitting diodes (inorganic LEDs) each having a size of  100  micrometers or less. 
     Such an LED panel is a self-emissive device but is not susceptible to OLED burn-in as an inorganic light-emitting device, and has excellent brightness, resolution, power consumption, and durability. 
     Compared to the LCD panels that require backlighting, micro LED display panels provide better contrast, response time, and energy efficiency. OLEDs and micro-LEDs (i.e., inorganic LEDs) are both energy efficient, but micro LEDs have excellent brightness, luminous efficiency, and lifespan compared to OLEDs. 
     In addition, the micro LEDs may achieve a substrate-level display modulation by arranging LEDs on a circuit board in units of pixels, and provide various resolutions and screen sizes of display according to the customer&#39;s order. 
     SUMMARY 
     Example embodiments address at least the above problems and/or disadvantages and other disadvantages not described above. Also, the example embodiments are not required to overcome the disadvantages described above, and may not overcome any of the problems described above. 
     One or more example embodiments of the present disclosure provide a display apparatus and a method of manufacturing the same, and specifically, a display module suitable for a large sized display, a display apparatus having the same, and a method of manufacturing the same. 
     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. 
     According to an aspect of the disclosure, there is provided a display module including: (1) a substrate including a mounting surface on which a thin film transistor (TFT) layer is formed, a side surface, and a chamfer portion formed between the mounting surface and the side surface; (2) a plurality of inorganic light emitting diodes (LEDs) disposed on the TFT layer, each of the plurality of inorganic LEDs including: a pair of electrodes electrically connected to the TFT layer and disposed to face the mounting surface, and a light emitting surface configured to emit light in a first direction opposite to a second direction that extends from the plurality of inorganic LEDs to the mounting surface of the substrate; and a molding provided to cover the plurality of inorganic LEDs, the chamfer portion of the substrate, and the side surface of the substrate. 
     The mounting surface may include four edges, and one of the four edges may correspond to the side surface, and the molding may cover the four edges of the mounting surface. 
     The display module may further include a printed circuit board (PCB) configured to electrically control the plurality of inorganic LEDs, wherein the PCB may be arranged on a rear surface of the substrate that is disposed to be opposite to the mounting surface, and the molding may surround the mounting surface, the chamfer portion, and the side surface. 
     The display module may further include a cover arranged on an upper surface of the molding, wherein the molding may have a first surface area larger than a second surface area of the mounting surface of the substrate, and the cover may have a third surface area equal to or larger than the first surface area of the molding. 
     The display module may further include a cover arranged on an upper surface of the molding, wherein the cover may include a cover glass; and a circular polarization layer arranged in front of the cover glass and configured to circularly polarize light that is transmitted through the circular polarization layer. 
     The display module may further include a light absorbing pattern arranged between the molding and the cover glass, and a black matrix formed between the plurality of inorganic LEDs on the mounting surface, wherein the light absorbing pattern may be located at a position corresponding to a position of the black matrix in a third direction in which the mounting surface faces. 
     The display module of claim  6 , wherein the light absorbing pattern may extend outside the side surface in a fourth direction perpendicular to the third direction in which the mounting surface faces. 
     The display module may further include a cover arranged on an upper surface of the molding, wherein the cover may include a first layer, and a second layer stacked on the first layer and located at a rear side of the first layer in the first direction. 
     The first layer may include at least one of an anti-glare layer provided to diffusely reflect an incident light or an anti-reflect layer provided to change a reflection direction of the incident light. 
     The second layer may include a material that lowers transmission of an incident light that is incident on the second layer and then is transmitted through the second layer. 
     The second layer may include a circular polarization layer. 
     The display module may further include a black matrix arranged between the plurality of inorganic LEDs. 
     Each of the plurality of inorganic LEDs may further include a bottom surface formed at a side opposite to the light emitting surface, wherein the pair of electrodes may be arranged on the bottom surface. 
     According to another aspect of the disclosure, there is provided a display apparatus including a display module array in which a plurality of display modules are arranged in a M×N matrix, wherein M and N may be natural numbers, and wherein each of the plurality of display modules may include: (1) a substrate including a mounting surface on which a thin film transistor (TFT) layer is formed, a side surface, and a chamfer portion formed between the mounting surface and the side surface; (2) a plurality of inorganic light emitting diodes (LEDs) disposed on the TFT layer, each of the plurality of inorganic LEDs including a pair of electrodes electrically connected to the TFT layer and disposed to face the mounting surface, and a light emitting surface configured to emit light in a first direction opposite to a second direction that extends from the plurality of inorganic LEDs to the mounting surface of the substrate the pair of electrodes are disposed; and a molding provided to cover the plurality of inorganic LEDs, the chamfer portion of the substrate, and the side surface of the substrate. 
     Each of the plurality of display modules may further include a printed circuit board (PCB) provided to drive the plurality of inorganic LEDs and disposed at a side opposite to the mounting surface, and a wiring connecting the plurality of inorganic LEDs to the PCB and extending along the side surface, wherein the molding is provided to cover the wiring extending on the side surface. 
     The mounting surface may include four edges, and one of the four edges may correspond to the side surface, and the molding may cover the four edges of the mounting surface. 
     The molding may include a first region located outside the mounting surface in a third direction perpendicular to the first direction and a second region located on the mounting surface, and the cover may include a first region located to correspond to the first region of the molding in the first direction and a second region located to correspond to the second region of the molding in the first direction. 
     The plurality of display modules may include a first display module and a second display module arranged adjacent to the first display module in the third direction. The plurality of inorganic LEDs of the first display module may include a first inorganic LED adjacent to the second display module and a second inorganic LED adjacent to the first inorganic LED in the third direction. The plurality of inorganic LEDs of the second display module may include a third inorganic LED adjacent to the first display module and a fourth inorganic LED adjacent to the third inorganic LED in the third direction. An interval between the first inorganic LED and the second inorganic LED may correspond to an interval between the first inorganic LED and the third inorganic LED. 
     A sum of a length between an end portion of the substrate of the first display module and the first LED in a fourth direction toward the second display module and a length of the first region of the molding in the fourth direction toward the second display module may correspond to half of the interval between the first inorganic LED and the second inorganic LED. 
     The cover may include a cover glass and a circular polarization layer arranged at an upper side of the cover glass in the first direction. 
     According to another aspect of the disclosure, there is provided a display apparatus including: (1) a front cover configured to protect the display apparatus from external force; (2) a substrate disposed to be opposite to the front cover; (3) a thin film transistor (TFT) layer disposed on the substrate, and between the substrate and the front cover; (4) a plurality of micro inorganic light emitting diodes (LEDs) disposed on the TFT layer, each of the plurality of micro inorganic LEDs including: at least one electrode that is connected to the TFT layer; and a light emitting surface configured to emit light in a direction toward the front cover; and (5) a molding disposed between the substrate and the front cover, to cover the micro inorganic LEDs and the substrate. 
    
    
     
       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 view illustrating a display apparatus according to an embodiment of the disclosure; 
         FIG. 2  is an exploded view illustrating main components of the display apparatus shown in  FIG. 1 ; 
         FIG. 3  is an enlarged cross-sectional view illustrating some components shown in  FIG. 1 ; 
         FIG. 4  is a perspective view illustrating a display module of the display apparatus shown in  FIG. 1 ; 
         FIG. 5  is a cross-sectional view illustrating some components of the display apparatus shown in  FIG. 1 ; 
         FIG. 6  is an enlarged cross-sectional view illustrating other components shown in  FIG. 5 ; 
         FIG. 7  is a cross-sectional view illustrating some components of the display apparatus shown in  FIG. 1 ; 
         FIG. 8  is a flowchart showing a method of manufacturing a display apparatus according to an embodiment of the disclosure; and 
         FIG. 9  is an enlarged cross-sectional view illustrating some components of a display apparatus according to another embodiment of the disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Example embodiments are described in greater detail below with reference to the accompanying drawings. 
     In the following description, like drawing reference numerals are used for like elements, even in different drawings. The matters defined in the description, such as detailed construction and elements, are provided to assist in a comprehensive understanding of the example embodiments. However, it is apparent that the example embodiments can be practiced without those specifically defined matters. Also, well-known functions or constructions are not described in detail since they would obscure the description with unnecessary detail. 
     In the following description, it is to be understood that the singular forms “a,” “an,” and “the” include plural references unless the context clearly dictates otherwise. In order to make the description of the disclosure clear, unrelated parts are not shown and, the sizes of components are exaggerated for clarity. 
     It will be further understood that the terms “include”, “comprise” and/or “have” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. 
     In addition, the meaning of “identical” in the specification may include having similar properties or similarity within a certain range. In addition, the “identical” refers to “substantially identical”. It should be understood that the meaning of “substantially identical” refers to a value that falls within an error range in manufacturing or a value having a difference within a range that does not have a significance with respect to a reference value. 
     Expressions such as “at least one of,” when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list. For example, the expression, “at least one of a, b, and c,” should be understood as including only a, only b, only c, both a and b, both a and c, both b and c, all of a, b, and c, or any variations of the aforementioned examples. 
     Hereinafter, embodiments according to the disclosure will be described in detail with reference to the accompanying drawings. 
       FIG. 1  is a view illustrating a display apparatus according to an embodiment of the disclosure,  FIG. 2  is an exploded view illustrating main components of the display apparatus shown in  FIG. 1 ,  FIG. 3  is an enlarged cross-sectional view illustrating some components shown in  FIG. 1 ,  FIG. 4  is a perspective view illustrating a display module of the display apparatus shown in  FIG. 1 ,  FIG. 5  is a cross-sectional view illustrating some components of the display apparatus shown in  FIG. 1 , and  FIG. 6  is an enlarged cross-sectional view illustrating other components shown in  FIG. 5 . 
     In the following description, components of a display apparatus  1  including a plurality of inorganic light emitting diodes  50  shown in the drawings are components in micro-units having a size of several pm to several hundreds of pm, and the sizes of some components (a plurality of inorganic light emitting diodes  50 , a black matrix  80 , etc.) shown in the drawings may be exaggerated for the sake of convenience of description. 
     The display apparatus  1  is a device that displays information, material, data, etc. as characters, figures, graphs, images, etc., and may be implemented as a television (TV), a personal computer (PC), a mobile, a digital signage, etc. 
     According to the embodiment of the disclosure, referring to  FIGS. 1 and 2 , the display apparatus  1  includes a display panel  20  displaying an image, a power supply device configured to supply power to the display panel  20 , a main board  25  controlling the overall operation of the display panel  20 , a frame  21  supporting the display panel  20 , and a rear cover  10  covering a rear surface of the frame  21 . 
     The display panel  20  may include a plurality of display modules  30 A to  30 P, a driving board for driving each of the display modules  30 A to  30 P, and a Timing Controller (TCON) board generating a timing signal required for controlling each of the display modules  30 A to  30 P. 
     The rear cover  10  may support the display panel  20 . The rear cover  10  may be installed on the floor through a stand, or may be installed on a wall through a hanger. 
     The plurality of display modules  30 A to  30 P may be arranged in upper and lower side directions and left and right side directions so as to be adjacent to each other. The plurality of display modules  30 A to  30 P may be arranged in an M*N matrix form, wherein M and N are natural numbers. In the embodiment, the display modules  30 A to  30 P are provided as sixteen display modules  30 A to  30 P and are arranged in a 4*4 matrix form, but there is no limitation on the number and arrangement method of the plurality of display modules  30 A to  30 P. 
     The plurality of display modules  30 A to  30 P may be installed on the frame  21 . The plurality of display modules  30 A to  30 P may be installed on the frame  21  through various methods, such as magnetic force using a magnet or a mechanical fitting structure. The rear cover  10  is coupled to the rear of the frame  21 , and the rear cover  10  may form the rear appearance of the display apparatus  1 . 
     As described above, the display apparatus  1  according to the embodiment of the disclosure may implement a large screen by tiling the plurality of display modules  30 A to  30 P. 
     According to another embodiment, in the plurality of display modules  30 A to  30 P, each single display module may be applied to a display apparatus. That is, the display modules  30 A to  30 P may be individually installed on an electronic product or a machine part, such as a wearable device, a portable device, a handheld device, and other various displays that require various displays, or may be assembled in a matrix form as in the embodiment and used for a display apparatus, such as a monitor for a PC, a high-definition TV and signage, and an electronic display. 
     The plurality of display modules  30 A to  30 P may have the same configuration. Therefore, the description of any one display module described below may be equally applied to all other display modules. 
     One of the plurality of display modules  30 A to  30 P, for example, the first display module  30 A may be formed in a quadrangle type. Alternatively, the first display module  30 A may be provided in a rectangular type or a square type. 
     Accordingly, the first display module  30 A may include edges  31 ,  32 ,  33 , and  34  formed in the upper and lower side direction and the left and right side directions with respect to a first direction X, which is the forward direction. The first direction X may be normal or perpendicular to a surface of the first display module  30 A, and may be opposite to a direction that extends from the plurality of inorganic light emitting diodes  50  to the mounting surface  41 . 
     Referring to  FIG. 3 , each of the plurality of display modules  30 A to  30 P may include a substrate  40  and a plurality of inorganic light emitting diodes  50  mounted on the substrate  40 . The plurality of inorganic light emitting diodes  50  may be mounted on a mounting surface  41  of the substrate  40  facing in the first direction X. 
     The substrate  40  may be formed in a quadrangle type. As described above, the plurality of display modules  30 A to  30 P may be formed in a quadrangle shape, and the substrate  40  may be formed in a quadrangle shape to correspond to each display module. 
     The substrate  40  may be provided in a rectangular shape or a square shape. 
     Therefore, taking the first display module  30 A as an example, the substrate  40  may include four edges E corresponding to the edges  31 ,  32 ,  33 , and  34  of the first display module  30 A formed in the upper and lower side directions and in the left and right side directions with respect to the first direction X, which is the forward direction (see  FIG. 4 ). 
     The substrate  40  may include a base substrate  42  and a thin film transistor (TFT) layer  43  formed on the base substrate  42  to drive the inorganic light emitting diodes  50 . The base substrate  42  may include a glass substrate. That is, the substrate  40  may include a chip on glass (COG) type substrate. The substrate  40  may include first and second pad electrodes  44   a  and  44   b  provided to electrically connect the inorganic light emitting diodes  50  to the TFT layer  43 . 
     A TFT constituting the TFT layer  43  is not limited to a specific structure or type, and may be configured in various embodiments. That is, the TFT of the TFT layer  43  according to an embodiment of the disclosure may be implemented as a Low Temperature Poly Silicon (LTPS) TFT, an oxide TFT, a Si (poly silicon, or a-silicon) TFT, an organic TFT, a graphene TFT, or the like. The TFT layer  43  may entirely or partially cover the mounting surface  41  of the substrate  40 . 
     In addition, when the base substrate  42  of the substrate  40  is formed of a silicon wafer, the TFT layer  43  may be replaced by a Complementary Metal-Oxide Semiconductor (CMOS) type transistor or an n-type or p-type MOSFET transistor. 
     The plurality of inorganic light emitting diodes  50  may include inorganic light emitting diodes formed of an inorganic material and having a width, a length, and a height, each of several μm to several tens of μm. The micro-inorganic light emitting diode may have a short side of 100 μm or less among the width, the length, and the height. That is, the inorganic light emitting diode  50  may be picked up from a sapphire or silicon wafer and transferred directly onto the substrate  40 . The plurality of inorganic light emitting diodes  50  may be picked up and transported through an electrostatic method using an electrostatic head or a stamp method using an elastic polymer material, such as polydimethylsiloxane (PDMS) or silicon, as a head. 
     The plurality of inorganic light emitting diodes  50  is a light emitting structure including an n-type semiconductor  58   a,  an active layer  58   c,  a p-type semiconductor  58   b,  a first contact electrode  57   a,  and a second contact electrode  57   b.    
     One of the first contact electrode  57   a  and the second contact electrode  57   b  is electrically connected to the n-type semiconductor  58   a,  and the other is provided to be electrically connected to the p-type semiconductor  58   b.    
     The first contact electrode  57   a  and the second contact electrode  57   b  may be in the form of a flip chip so as to be disposed parallel with each other while facing in the same direction (a direction opposite to the light emission direction). 
     The inorganic light emitting diode  50  includes a light emitting surface  54  disposed to face in the first direction X when mounted on the mounting surface  41 , a side surface  55 , and a bottom surface  56  disposed at a side opposite to the light emitting surface  54 , and the first contact electrode  57   a  and the second contact electrode  57   b  may be formed on the bottom surface  56 . 
     That is, the contact electrodes  57   a  and  57   b  of the inorganic light emitting diode  50  may be disposed on a side opposite to the light emitting surface  54  so as to be disposed at a side opposite and facing away the light emission direction. 
     The contact electrodes  57   a  and  57   b  may be disposed to face the mounting surface  41 , may be electrically connected to the TFT layer  43 , and the light emitting surface  54  may be arranged to emit light in a direction opposite and facing away from the contact electrodes  57   a  and  57   b  are oriented. 
     Therefore, when light generated from the active layer  58   c  is emitted in the first direction X through the light emitting surface  54 , the light may be emitted in the first direction X without interfering with the first contact electrode  57   a  or the second contact electrode  57   b.    
     That is, the first direction X may be defined as a direction in which light is emitted from the light emitting surface  54 . 
     The first contact electrode  57   a  and the second contact electrode  57   b  may be electrically connected to the first pad electrode  44   a  and the second pad electrode  44   b  formed at a side of the mounting surface  41  of the substrate  40 , respectively. 
     As will be described below, the inorganic light emitting diode  50  may be directly connected to the pad electrodes  44   a  and  44   b  through a bonding configuration, such as an anisotropic conductive layer  70  or solder. 
     The anisotropic conductive layer  70  may be formed on the substrate  40  to mediate electrical bonding between the contact electrodes  57   a  and  57   b  and the pad electrodes  44   a  and  44   b.  The anisotropic conductive layer  70  may represent an anisotropic conductive adhesive attached on a protective film, and have a structure in which conductive balls  71  are scattered in an adhesive resin. The conductive balls  71  may be conductive spheres surrounded by a thin insulating film, and when the insulating film is broken by a pressure, electrical connection occurs between conductors. 
     The anisotropic conductive layer  70  may include an anisotropic conductive film (ACF) in the form of a film and an anisotropic conductive paste (ACP) in the form of a paste. 
     Therefore, when the plurality of inorganic light emitting diodes  50  are mounted on the substrate  40 , a pressure applied to the anisotropic conductive layer  70  causes the insulating film of the conductive balls  71  to be broken, so that the contact electrode  57   a  and  57   b  of the inorganic light emitting diode  50  may be electrically connected to the pad electrodes  44   a  and  44   b  of the substrate  40 . 
     In another example, the plurality of inorganic light emitting diodes  50  may be mounted on the substrate  40  through a solder instead of the anisotropic conductive layer  70 . The inorganic light emitting diode  50  may be aligned on the substrate  40  first, and then the inorganic light emitting diode  50  may be subject to a reflow process to be bonded to the substrate  40 . 
     The plurality of inorganic light emitting diodes  50  may include a red light emitting device  51 , a green light emitting device  52 , and a blue light emitting device  53 , and the light emitting devices  50  may be mounted on the mounting surface  41  of the substrate  40  in a series of the red light emitting devices  51 , the green light emitting devices  52 , and the blue light emitting devices  53  as one unit. A series of the red light emitting devices  51 , the green light emitting devices  52 , and the blue light emitting devices  53  may form one pixel. In this case, the red light emitting device  51 , the green light emitting device  52 , and the blue light emitting device  53  may each form a sub-pixel. 
     The red light emitting device  51 , the green light emitting device  52 , and the blue light emitting device  53  may be arranged in a line at predetermined intervals as in the embodiment of the disclosure, or may be arranged in a different shape, such as a triangular shape. 
     The substrate  40  may include a light absorbing layer  60  to improve the contrast by absorbing external light. The light absorbing layer  60  may be formed at a side of the mounting surface  41  of the substrate  40  as a whole. The light absorbing layer  60  may be formed between the TFT layer  43  and the anisotropic conductive layer  70 . 
     The plurality of display modules  30 A to  30 P may further include a black matrix  80  formed between the plurality of inorganic light emitting diodes  50 . 
     The black matrix  80  may perform a function of supplementing the light absorbing layer  60  entirely formed at a side of the mounting surface  41  of the substrate  40 . That is, the black matrix  80  absorbs external light and allows the substrate  40  to appear black, thereby improving the contrast of the screen. 
     The black matrix  80  may have a black color. 
     In the embodiment, the black matrix  80  is formed to be disposed between pixels each formed by a series of the red light emitting devices  51 , the green light emitting devices  52 , and the blue light emitting devices  53 . In another embodiment, the black matrix  80  may be formed at a higher precision and partition each of the light emitting devices  51 ,  52 , and  53 , which are sub-pixels. 
     The black matrix  80  may be formed in a grid shape having a horizontal pattern and a vertical pattern so as to be disposed between pixels. 
     The black matrix  80  may be formed by applying a light-absorbing ink on the anisotropic conductive layer  70  through an ink-jet process and curing the light-absorbing ink, or by coating a light-absorbing film on the anisotropic conductive layer  70 . 
     That is, on the anisotropic conductive layer  70  formed entirely on the mounting surface  41 , the black matrices  80  may be formed gaps between the plurality of inorganic light emitting diodes  50  in which the plurality of inorganic light emitting diodes  50  are not mounted. 
     The plurality of display modules  30 A to  30 P may include moldings  100  disposed on upper sides of the mounting surfaces  41  in the first direction X to cover the plurality of display modules  30 A to  30 P, and/or the mounting surfaces  41  of the plurality of display modules  30 A to  30 P, respectively. 
     Referring to  FIGS. 4 and 5 , the plurality of moldings  100  may be provided so as to be respectively formed on the upper sides of the plurality of display modules  30 A to  30 P in the first direction X. 
     Each of the plurality of display modules  30 A to  30 P may be assembled after a separate molding  100  is formed. That is, when taking the first display module  30 A and the second display module  30 E as an example among the plurality of display modules  30 A to  30 P, a first molding  100 A may be formed on the mounting surface  41  of the first display module  30 A, and a second molding  100 E may be formed on the mounting surface  41  of the second display module  30 E. 
     The molding  100  may cover the substrate  40  to protect the substrate  40  from external force or external moisture. 
     Each molding  100  may be formed of an optically transparent resin (e.g., Optical Clear Resin (OCR)). The OCR may be highly transparent with a transmittance of 90% or more. 
     The OCRs may improve visibility and image quality by increasing transmittance through low-reflection properties. That is, in a structure having an air gap, light loss occurs due to a difference in refractive index between a film layer and an air layer, but in a structure using an OCR, the difference in refractive index decreases, thereby reducing light loss and consequently improving visibility and image quality. 
     That is, the OCR may improve image quality as well as protecting the substrate  40 . 
     The molding  100  may have a predetermined height or larger in the first direction X in which the mounting surface  41  or the light emitting surface  54  faces. 
     This is to sufficiently fill a gap that may be formed between the molding  100  and the plurality of inorganic light emitting diodes  50  when the molding  100  is formed on the substrate  40 . 
     In detail, the plurality of inorganic light emitting diodes  50  mounted on the mounting surface  41  are disposed to protrude than the mounting surface  41  in the first direction X, and thus an uneven portion may be formed on the mounting surface  41  due to the plurality of inorganic light emitting diodes  50 . 
     When the molding  100  is formed on the mounting surface  41 , a void region may be formed between the mounting surface  41  and the molding  100  due to the uneven portion formed on the mounting surface  41 . In order to fill the uneven portion on the mounting surface  41  formed by the plurality of inorganic light emitting diodes  50 , the molding  100  needs to have a height at least several ten fold or several hundred fold greater than the height of the plurality of protruding inorganic light emitting diodes  50 . That is, the molding  100  is formed on the mounting surface  41  by being compression-hardened on the mounting surface  41 , and in a process of the molding being cured, a void region may be formed between the mounting surface  41  and the molding  100  due to the uneven portion, which may cause air bubbles to be formed. 
     However, when the molding  100  is formed to a certain height, the molding  100  may be formed inside the uneven portion formed on the mounting surface  41  during the compression hardening, so that the molding  100  may be completely formed on the mounting surface  41  without an empty space between the mounting surface  41  and the molding  100 . 
     The plurality of display modules  30 A to  30 P may include front covers  200  disposed at the foremost sides of the plurality of display modules  30 A to  30 P in the first direction X, respectively. 
     The front cover  200  may be provided in plural so as to be disposed on each of the plurality of display modules  30 A to  30 P. Each of the front covers  200  may be bonded to an upper side of a corresponding one of the moldings  100  of the plurality of display modules  30 A to  30 P in the first direction. 
     The front cover  200  may protect the substrate  40  from external force. As will be described below, the front cover  200  may reduce the revelation of a seam formed by a gap G formed between the plurality of display modules  30 A to  30 P, and improve color deviation between the plurality of display modules  30 A to  30 P. 
     The plurality of display modules  30 A to  30 P may be assembled after separate front covers  200  are bonded to respective moldings  100 . That is, when taking the first display module  30 A and the second display module  30 E among the plurality of display modules  30 A to  30 P as an example, a first front cover  200 A may be formed on the first molding  100 A of the first display module  30 A and a second front cover  200 E may be formed on the second molding  100 E of the second display module  30 E. 
     Hereinafter, the molding  100  and the front cover  200  will be described in detail. 
     Since the plurality of display modules  30 A to  30 P are formed identical to each other, the plurality of display modules  30 A to  30 P will be described in relation to the first display module  30 A. 
     That is, in order to avoid redundant descriptions, the configuration of the plurality of display modules  30 A to  30 P will be described in relation to the display module  30 , the substrate  40 , the molding  100 , and the front cover  200  as an example. 
     In addition, the first display module  30 A and a second display module  30 E disposed adjacent to the first display module  30 A in a second direction Y among the plurality of display modules  30 A to  30 P will be described as needed. 
     In addition, since the plurality of display modules  30 A to  30 P is formed identical to each other, the moldings  100  and the front covers  200  formed on the plurality of display modules  30 A to  30 P will be described in relation to the first molding  100 A and the first front cover  200 A of the first display module  30 A and the second molding  100 E and the second front cover  200 E of the second display module  30 E as an example. 
     One of a plurality of display manufacturing processes that implement a display panel using a display module is configured in a way to arrange a plurality of display modules adjacent to each other, form a single molding on the entire area of mounting surfaces of the plurality of display modules and gaps between the plurality of display modules, and form a light absorbing pattern on the molding, and collectively form a single front cover on the light absorbing pattern. 
     Alternatively, another processing method is configured in a way to form a light absorbing pattern on a single front cover, and tile a plurality of display modules to match with the light absorbing pattern to arrange the light absorbing pattern between gaps between the plurality of display modules. 
     Alternatively, another processing method is configured in a way to form a light absorbing pattern configuration in advance when forming a light absorbing pattern on a molding or a front cover before tiling a plurality of display modules. Unlike the above described processing methods, the display apparatus  1  according to the embodiment of the disclosure is manufactured by forming the molding  100  and the front cover  200  on each of the plurality of display modules  30 A to  30 P before tiling the plurality of display modules  30 A to  30 P. In addition, in order to absorb light reflected from the gaps G between the plurality of display modules  30 A to  30 P, the molding  1000  and the front cover  200  of each of the plurality of display modules  30 A to  30 P may be formed to extend outside the substrate  40  of each of the plurality of display modules  30 A to  30 P. 
     The gap G formed between the plurality of display modules  30 A to  30 P represents a gap between one of the side surfaces of the display modules  30 A to  30 P and another one of the side surface of the display modules  30 A to  30 P adjacent to the one side surface in the second direction Y or the third direction Z. 
     However, the side surfaces of the display modules  30 A to  30 P do not refer to side surfaces  45  of the substrates  40 , but refer to edges  41   e  of the mounting surfaces  41  of the display modules  30 A to  30 P. 
     Substantially, a gap between the display modules  30 A to  30 P may be formed between the side surfaces  45  of the substrates  40  of the display modules  30 A to  30 P, but since the gap G according to the embodiment of the disclosure refers to a non-display area that may be formed between the display modules  30 A to  30 P, the gap G formed between the plurality of display modules  30 A to  30 P should be understood as a gap from one of the edges  41   e  of the mounting surfaces  41  of the substrates  40  of the display modules  30 A to  30 P to another one of the edges  41   e  of the mounting surfaces  41  of the substrates  40  of the display modules  30 A to  30 P adjacent to the one edge  41   e.    
     Therefore, the gap G formed between the plurality of display modules  30 A to  30 P refers to a gap formed between one of the edges  41   e  of the mounting surfaces  41  of the display modules  30 A to  30 P and another one of the edges  41   e  of the mounting surfaces  41  of the display modules  30 A to  30 P adjacent to the one edge  41   e  in the second direction Y or the third direction Z. 
     Accordingly, as will be described below, in the gaps G formed between the plurality of display modules  30 A to  30 P, chamfer portions  49  and the side surfaces  45  of the substrates  40  of the display modules  30 A to  30 P may be disposed. 
     Accordingly, when the plurality of display modules  30 A to  30 P are tiled, the molding  100  and the front cover  200  extending from each of the display modules  30 A to  30 P are arranged in the gap G between the plurality of display modules  30 A to  30 P to absorb light transmitted to the gap G or light reflected from the gap G, thereby minimizing the perception of a seam. 
     Referring to  FIG. 6 , the molding  100  and the front cover  200  extend to the outside of the substrate  40  in the second direction Y. 
     The substrate  40  may include the mounting surface  41 , a rear surface  48  formed parallel to the mounting surface  41 , and the side surfaces  45  disposed between the mounting surface  41  and the rear surface  48 . 
     The substrate  40  may include the chamfer portion  49  formed between the mounting surface  41  and the side surface  45  and between the rear surface  48  and the side surface  45 . 
     The chamfer portion  49  may prevent each of the substrates from colliding and being damaged when the plurality of display modules  30 A to  30 P are arranged. 
     The molding  100  may surround and cover the substrate  40 . For example, the molding may cover the mounting surface  41  of the substrate  40  in the first direction X. 
     In addition, the molding  100  may cover not only the mounting surface  41  of the substrate  40  but also the side surface  45  facing in the second direction Y perpendicular to the first direction X and the chamfer portion  49 . 
     The embodiment of the disclosure is described in relation to one edge E of the substrate  40  corresponding to the right edge  31  of the first display module  30 A, but as shown in  FIG. 4 , the chamfer portions  49  and the side surfaces  45  may be formed on the other edges E of the substrate  40  corresponding to the other edges  32 ,  33 , and  34 . 
     That is, the chamfer portion  49  and the side surface  45  may be arranged on each of the four edges E of the substrate  40 . In addition, the molding  100  may cover the side surfaces  45  and the chamfer portions  49  formed on both side edges E of the substrate  40  in the second direction Y, and cover the side surfaces  45  and the chamfer portions  49  formed on both side edges E of the substrate  40  in the third direction Z (see  FIG. 4 ). 
     Accordingly, the molding  100  may protect the plurality of inorganic light emitting diodes  50  mounted on the mounting surface  41  from external force while protecting the side surfaces  45  of the substrate  40  from external force. 
     Additionally, the molding  100  may protect the substrate  40  from external moisture. 
     The first display module  30 A may include a printed circuit board (PCB)  47   a  provided to electrically control the plurality of inorganic light emitting diodes  50  mounted on the mounting surface  41  (see  FIG. 5 ) 
     The PCB  47   a  may supply power to the plurality of inorganic light emitting diodes  50  or transmit electrical signals to the plurality of inorganic light emitting diodes  50  to control respective driving of the plurality of inorganic light emitting diodes  50 . 
     The PCB  47   a  may be disposed on the rear surface  48  of the substrate  40  in the first direction X. 
     The substrate  40  may include a wiring  46  that electrically connects the PCB  47   a  to the plurality of inorganic light emitting diodes  50 . The wiring  46  may be provided in the form of a thin film. 
     The wiring  46  may connect the TFT layer  43  formed on the mounting surface  41  to the PCB  47   a.  In addition, a flexible circuit board  47   b  may be disposed between the wiring  46  and the PCB  47   a  to electrically connect the wiring  46  to the PCB  47   a.    
     The flexible circuit board  47   b  may be disposed on the rear surface  48  of the substrate  40  together with the PCB  47   a.    
     The TFT layer  43 , the wiring  46 , the flexible circuit board  47   b,  and the PCB  47   a  may be electrically connected in the order. 
     The wiring  46  has one end connected to a contact pad of the TFT layer  43  disposed on the side of the edge  41   e  of the mounting surface  41   e,  so that the TFT layer  43  is electrically connected to the wiring  46 . 
     In addition, the wiring  46  has the other end connected to the flexible circuit board  47   b  so that the wiring  46  is electrically connected to the flexible circuit board  57   b.    
     That is, the contact pad of the TFT layer  43  and a part of the wiring  46  may be disposed on the mounting surface  41  of the substrate  40 , and the wiring  46  may be disposed on the side surface  45  of the substrate  40 , and the PCB  47   a,  the flexible circuit board  47   b,  and at least a part of the wiring  46  may be disposed on the rear surface  480  of the substrate  40 . 
     As described above, since the TFT layer  43  is formed on the mounting surface  41  of the substrate  40 , and the PCB  47   a  is disposed on the rear surface  48  of the substrate  40  opposite to the mounting surface  41 , the wiring  46  may formed to extend along the chamfer portion  49  and the side surface  45  of the substrate  40  to connect the TFT layer  43  and the PCB  47   a  to each other. 
     The molding  100  may cover the mounting surface  41 , the chamfer portion  49 , and the side surface  45  of the substrate  40 . Additionally, the molding  100  may cover the wiring  46  extending along the chamfer portion  49  and the side surface  45  while covering the chamfer portion  49  and the side surface  45 . 
     That is, the molding  100  may be provided such that a portion of the molding  100  extends outside the mounting surface  41  in the second direction Y covers the chamfer portion  49 , the side surface  45 , and the wiring  46 . 
     Accordingly, the molding  100  may cover at least a portion of the wiring  46  in addition to the substrate  40  to thereby protect the substrate  40  and the wiring  46  from external force. 
     According to the embodiment of the disclosure, the wiring  46  may extend along the side surface  45  of the substrate  40  in the second direction Y to reach the rear surface  48  of the substrate  40 . Accordingly, the wiring  46  of the first display module  30 A may be disposed adjacent to the second display module  30 E that is adjacent to the first display module  30 A in the second direction Y. 
     However, the disclosure is not limited thereto, and the wiring  46  may extend along the side surface  45  of the substrate  40  in the third direction Z perpendicular to the first and second directions X and Y to reach the rear surface  48  of the substrate  40 . In this case, the wiring  46  of the first display module  30 A may be disposed adjacent to a third display module  30 B that is adjacent to the first display module  30 A in the third direction Z. 
     That is, according to the embodiment of the disclosure, the wiring  46  may extend along a side of one edge E of the substrate  40  corresponding to the right edge  31  of the first display module  30 A. However, the disclosure is not limited thereto, and the wiring  46  may extend along edges E of the substrate  40  corresponding to at least two of the four edges  31 ,  32 ,  33 , and  34  of the first display module  30 A. 
     According to the embodiment of the disclosure, the wiring  46  may extend along the side surfaces  45  formed on a pair of edges E of the substrate  40  corresponding to the right edge  31  and the left edge  33  to reach the rear surface  48  of the substrate  40 . 
     However, the disclosure is not limited thereto, and the wiring  46  may not extend along the edge E of the substrate  40  corresponding to the right edge  31  but may extend along the edge E of the substrate  40  corresponding to the upper edge  32  or the lower edge  34 . 
     At a side of an edge E of the substrate  40  on which the wiring  46  is disposed, such as the edge E of the substrate  40  corresponding to the right edge  31  among the four edges  31 ,  32 ,  33 , and  34 , the molding  100  may cover all the chamfer portion  49 , the side surface  45 , and the wiring  46 , but at a side of an edge E of the substrate  40  on which the wiring  46  is not disposed, the molding  100  may cover only the chamfer portion  49  and the side surface  45 . 
     The front cover  200  may include a first layer  210  disposed at the outermost side of the display module  30  in the first direction X and a second layer  220  disposed behind the first layer  220 . The first and second layers  210  and  220  may be stacked one on top of the other in the first direction X. 
     The front cover  200  may include an adhesive layer  230  provided so that the first layer  210  and the second layer  220  are attached to an upper surface of the molding  100  in the first direction X. The adhesive layer  230  may be disposed at the rearmost side of the front cover  200  in the first direction X. 
     However, the disclosure is not limited thereto, and the adhesive layer  230  may be provided as a component of the molding  100  that is arranged on an upper surface of the molding  100  in the first direction X such that the front cover  200  is attached to the molding  100 . 
     The adhesive layer  230  may be formed of a transparent material so that light may be easily transmitted therethrough. In an embodiment, the adhesive layer  230  may be in a highly transparent state having a transmittance of  90 % or more, such as an optically transparent resin (OCR). 
     Accordingly, external light may sequentially pass through the first layer  210 , the second layer  220 , and the adhesive layer  230  and then transmit through the molding  100  to reach the substrate  40  and the gap G. 
     On the contrary, light reflected from the substrate  40  and the gap G may transmit through the molding  100  and then sequentially pass through the adhesive layer  230 , the second layer  220 , and the first layer  210  to the outside of the display panel  20 . 
     The first layer  210  may be provided as an anti-glare layer  210 . That is, the first layer  210  may be formed of a material that diffusely reflects light incident from the outside, or may include particles that diffusely reflects light incident from the outside. 
     However, the disclosure is not limited thereto, and the first layer  210  may be formed as a layer having a different property or material, or having a different function, which will be described below. In the following description, the first layer  210  will be illustrated as an anti-glare layer  210  for the sake of convenience in description. 
     The anti-glare layer  210  may diffusely reflects the light incident from the outside so as to prevent the externally incident light from being regularly reflected and dazzling the user. 
     As light incident from the outside is diffusely reflected, a glare phenomenon may be reduced and the contrast of a screen displayed on the display panel  20  may be improved. 
     The second layer  220  may be provided as a light transmittance control layer  220 . That is, the second layer  220  may be formed of a material that passes only a part of light incident from the outside or may include particles having a low light transmittance. 
     However, the disclosure is not limited thereto, and the second layer  220  may be formed as a layer having a different property or material, or having a different function, which will be described below. In the following description, the second layer  210  will be illustrated as a light transmittance control layer  210  for the sake of convenience in description. 
     The light transmittance control layer  220  may reduce the transmittance of incident external light or the transmittance of external light reflected from the substrate  40  and the gap G. 
     The light transmittance control layer  220  according to the embodiment of the disclosure includes a material of a component that lowers the transmittance of light so as to allow at least a part of light to be transmitted to the substrate  40  therethrough or absorb at least a part of light reflected from the substrate  40  and proceeding in the first direction X. 
     The light transmittance control layer  220  may have a transparency lower than that of the molding  100  in order to lower the transmittance of light. When a plurality of substrates are produced, some substrates may have different colors due to process errors during the production. Accordingly, substrates having different unique colors may be tiled to form a single display panel. 
     As described above, the light transmittance control layer  220  according to the embodiment of the disclosure absorbs at least a part of light reflected from the substrate  40  and transmitted to the outside, thereby increasing the sense of unity of the screen of the display panel  20 . 
     That is, the light transmittance control layer  220  may reduce the color deviation of each display module  30 A to  30 P occurring due to process errors of the display module  30 A to  30 P by lowering the external light transmittance. 
     The anti-glare layer  210  may prevent external light incident onto the display panel  20  from being transmitted to the substrate  40 , and the light transmittance control layer  220  may absorb a part of light incident onto the display panel  20  from the outside or absorb a part of external light reflected from the substrate  40  and transmitted to the outside of the display panel  20  to improve the contrast of a screen displayed on the display panel. 
     That is, the front cover  200  may be disposed in front of the substrate  40  in the first direction X to improve the contrast that may be degraded by external light on the screen displayed on the display panel  20 . 
     As described above, in the case of the display module  30  according to the embodiment of the disclosure, the front cover  200  may extend outside of the substrate  40  in the second direction Y. 
     Accordingly, a part of the light introduced into the gap G formed between the plurality of display modules  30 A to  30 P may be blocked by at least a part of the anti-glare layer  210  disposed in the gap G, and at least a part of external light introduced into the gap G or reflected in the gap G may be absorbed by the light transmittance control layer  220  disposed in the gap G and prevented from being transmitted to the outside. Accordingly, the revelation of a seam formed in the gap G may be reduced, and the sense of unity of the screen displayed on the display panel  20  may be improved as the revelation of the seam decreases. 
     In detail, the molding  100  includes a first region  101  disposed outside the mounting surface  41  in the second direction Y or disposed in the gap G and a second region  102  disposed on the mounting surface  41 . 
     The first region  101  of the molding  100  is a region of the molding  100  formed to cover the side surface  45  of the substrate  40 . 
     The first region  101  and the second region  102  of the molding  100  may be divided by an edge  41   e  of the mounting surface  41 . That is, the region disposed outside the mounting surface  41  with respect to the edge  41   e  of the mounting surface  41  is the first region  101  and the region disposed on the mounting surface  41  is the second region  102 . 
     The molding  100  may surround the mounting surface  41  of the substrate  40  and the four side surfaces  45  of the substrate  40  corresponding to the four edges of the display module  30 (see  FIG. 4 ). 
     That is, the molding  100  may surround all the side surfaces  45  of the substrate  40 . Accordingly, the molding  100  may include two first regions  101  in the second direction Y and two first regions  101  in the third direction Z. 
     Accordingly, all four side surfaces  45  of the substrate  40  may be protected from external force by the molding  100 , and the wiring  46  extending along at least one of the four side surfaces  45  may be protected from external force. 
     In addition, the revelation of the seam that may occur between the four side surfaces  45  and the display modules  30 B and  30 E adjacent to the side surfaces  45  may be reduced. Reducing of the revelation of the deliberation will be described in detail below. 
     Hereinafter, only the first region  101  covering the side surface  45  of the substrate  40  corresponding to the right edge  31  of the first display module  30 A will be described in order to avoid redundant descriptions. 
     The front cover  200  may include a first region  201  disposed outside the mounting surface  41  in the second direction Y or in the gap G to correspond to the first region  101  of the molding  100  in the first direction X and a second region  202  disposed on the mounting surface  41  to correspond to the second region  102  of the molding  100  in the first direction X. 
     The first regions  101  and  201  of the molding  100  and the front cover  200  and the second regions  102  and  202  of the molding  100  and the front cover  200  may be divided by a gap G in the second direction Y. 
     The first region  201  of the front cover  200  is disposed in the gap G, and the first region  101  of the molding  100  supporting the first region  201  of the front cover  200  is disposed in the gap G. Accordingly, external light directed to the gap G may be blocked by the first region  201  of the front cover  200 , or light reflected from the gap G and then directed to the outside is blocked by the first region  201  of the front cover  200  so that the revelation of a seam, which may be formed by the gap G as a boundary between the plurality of display modules  30 A to  30 P, is reduced and the sense of unity of the display panel  20  is improved. 
     As the first region  101  of the molding  100  is disposed in the gap G, the first region  201  of the front cover  200  may be stably supported. In addition, the first region  101  of the molding  100  covers the chamfer portion  49 , the side surface  45 , and the wiring  46  of the substrate  40  as described above, thereby protecting the mounting surface  41 , the chamfer portion  49 , the side surface  45 , and the wiring  46  of the substrate  40  from the external force. 
     That is, when the molding  100  only includes the second region  102  without the first region  101 , the side surface  45  and the wiring  46  of the substrate  40  may not be protected, and the first region  201  of the front cover  200  is not easily supported, so that the reliability of the display module  30  may be deteriorated. 
     As described above, the molding  100  and the front cover  200  may extend outside the mounting surface  41  not only in the second direction Y but also in a direction opposite to the second direction Y. 
     In addition, the molding  100  and the front cover  200  may extend outside the mounting surface  41  also in the third direction Z perpendicular to each of the first direction X and the second direction Y. That is, in an embodiment, the molding  100  and the front cover  200  may extend outside the four edges  41   e  of the mounting surface  41  (see  FIG. 4 ). 
     Taking the first display module  30 A and the second display module  30 E as an example, the first region  101 A of the first molding  100 A and the first region  201 A of the first front cover  200 A extending from the first display module  30 A may be disposed in the gap G formed between the first display module  30 A and the second display module  30 E. 
     The gap G may be defined as an interval between the edge  41   e  of the mounting surface  41  of the first display module  30 A and the edge  41   e  of the mounting surface  41  of the second display module  30 E in the second direction Y. 
     Accordingly, the side surfaces  45 , the chamfer portions  49 , and the wirings  46  of the first and second display modules  30 A and  30 E may be disposed in the gap G. 
     The second region  102 A of the first molding  100 A and the second region  202 A of the first front cover  200 A may be disposed on the mounting surface  41  of the first display module  30 A. 
     The first region  101 E of the second molding  100 E and the first region  201 E of the second front cover  200 E extending from the second display module  30 E may be disposed in the gap G formed between the first display module  30 A and the second display module  30 E, and the second region  102 E of the second molding  100 E and the second region  202 E of the second front cover  200 E may be disposed on the mounting surface  41  of the second display module  30 E. 
     That is, in the gap G formed between the first display module  30 A and the second display module  30 E, the first regions  101 A and  201 A of the first molding  100 A and the first front cover  200 A are arranged parallel with the first regions  101 E and  201 E of the second molding  100 E and the second front cover  200 E in the second direction Y. 
     The first regions  101 A,  201 A,  101 E, and  201 E of the first and second moldings  100 A and  100 E and the first and second front covers  200 A and  200 E may each extend in the second direction Y or in a direction opposite to the second direction Y by a length less than half of the gap G. 
     Accordingly, when the first regions  101 A and  201 A of the first molding  100 A and the first front cover  200 A are arranged parallel with the first regions  101 E and  201 E of the second molding  100 E and the second front cover  200 E in the second direction Y, the size of the first regions  101 A and  201 A and the size of the first region  101 E or  201 E are set such that a value obtained by adding the length of the first region  101 A or  201 A of the first molding  100 A or the first front cover  200 A to the length of the first region  101 E or  201 E of the second molding  100 E or the second front cover  200 E in the second direction Y may be provided equal to or smaller than the length of the gap G in the second direction Y. 
     According to the embodiment of the disclosure, when the first regions  101 A and  201 A of the first molding  100 A and the first front cover  200 A are arranged parallel with the first regions  101 E and  201 E of the second molding  100 E and the second front cover  200 E in the second direction Y, a predetermined distance d may exist between the first regions  101 A and  201 A of the first molding  100 A and the first front cover  200 A and the first regions  101 E and  201 E of the second molding  100 E and the second front cover  200 E in the second direction Y. 
     However, the disclosure is not limited thereto, and the first display module  30 A and the second display module  30 E may be tiled without having the first regions  101 A and  201 A of the first molding  100 A and the first front cover  200 A spaced apart the first regions  101 E and  201 E of the second molding  100 E and the second front cover  200 E in the second direction Y. However, a predetermined distance d may exist between the first regions  101 A and  201 A of the first molding  100 A and the first front cover  200 A and the first regions  101 E and  201 E of the second molding  100 E and the second front cover  200 E in the second direction Y. However, for the assembly performance, in an embodiment, the first regions  101 A and  201 A of the first molding  100 A and the first front cover  200 A may be spaced apart from the first regions  101 E and  201 E of the second molding  100 E and the second front cover  200 E in the second direction Y by a predetermined distance d. 
     As described above, in the gap G between the first display module  30 A and the second display module  30 E, the first regions  101 A and  201 A of the first molding  100 A and the first front cover  200 A and the first regions  101 E and  201 E of the second molding  100 E and the second front cover  200 E may be arranged. 
     External light is sequentially transmitted through the first regions  201 A and  201 E of the first and second front covers  200 A and  200 E and then through the first regions  101 A and  101 E of the first and second moldings  100 A and  100 E, by which the external light is diffusely reflected to the outside or is partially absorbed by the first regions  201 A,  201 E of the first and second front covers  200 A and  200 E so that the amount of the external light reaching the gap G is reduced and the revelation of the boundary between the first display module  30 A and the second display module  30 E due to the gap G may be reduced. 
     In addition, light reflected from the gap G and directed to the outside of the display panel  20  is sequentially transmitted through the first regions  101 A and  101 E of the first and second moldings  100 A and  100 E and then through the first regions  201 A and  201 E of the first and second front covers  200 A and  200 E, by which the light is diffusely reflected outside of the display panel  20  or partially absorbed by the first regions  201 A and  201 E of the first and second front covers  200 A and  200 E and the amount of the light transmitted to the outside of the display panel  20  is reduced and the revelation of the boundary between the first display module  30 A and the second display module  30 E due to the gap G may be reduced. 
     That is, the first region  101  of the molding  100  and the first region  201  of the front cover  200  may allow the amount of external light introduced into the gap G formed between the plurality of display modules  30 A to  30 P while absorbing at least part of external light reflected from the gap G, so that the sense of unity of the screen of the display panel  20  may be improved. 
     Additionally, even when the substrate  40 A of the first display module  30 A and the substrate  40 E of the second display module  30 E have different colors, when each of the substrates  40 A and  40 E is displayed to the outside by reflection of external light, at least a part of the reflected light is absorbed by a corresponding one of the first and second front covers  200 A and  200 E, so that the unique color of each of the substrates  40 A and  40 E is not perceived to the outside, so that the sense of unity of the screen may be improved. 
     That is, the molding  100  and the front cover  200  reduce the revelation of the seam that may occur in the gap G between the plurality of display modules  30 A to  30 P while reducing the color deviation of the plurality of display modules  30 A to  30 P as described above, thereby improving the sense of unity of the screen of the display panel  20 . 
     In an embodiment, end portions of the molding  100  and the front cover  200  in the second direction Y may be provided parallel to a direction corresponding to the first direction X. With such a configuration, when the plurality of display modules  30 A to  30 P are tiled, a gap between each of the display modules  30 A to  30 P may be minimized. 
     In addition, when the end portions of the molding  100  and the front cover  200  in the second direction Y are provided at an angle with respect to the first direction X, and the plurality of display modules  30 A to  30 P are tiled, the molding  100  or the front cover  200  may fail to be arranged in the gap G formed between the plurality of display modules  30 A to  30 P. 
     As light emitted from the plurality of display modules  30 A to  30 P passes through the molding  100  and the front cover  200 , part of the light is reflected inside the molding  100  and the front cover  200  to move in a substantially second direction Y, which may cause a light leakage phenomenon in which light is transmitted through the end portions of the molding  100  and the front cover  200  in the second direction Y. 
     In this case, since the end portions of the molding  100  and the front cover  200  in the second direction Y are arranged in the gap G formed between the plurality of display modules  30 A to  30 P, when part of the light is transmitted to the outside of the display panel  20  at the gap G, the revelation of the seam perceived from the gap G may be increased. 
     However, when the end portions of the molding  100  and the front cover  200  of each of the display modules  30 A to  30 P in the second direction Y are formed to be parallel in the direction corresponding to the first direction X, the gap between the molding  100  and the front cover  200  of one of the display modules  30 A to  30 P and the molding  100  and the front cover  200  of another one of the display modules  30 A to  30 P adjacent to the one display module may be minimized. 
     Accordingly, light moving inside the molding  100  and the front cover  200  of each of the display modules  30 A to  30 P in the second direction Y is not transmitted to the outside of the end portions of the molding  100  and the front cover  200  thereof in the second direction Y (or outside of the gap G), but is introduced into the molding  100  and the front covers  200  of an adjacent one display modules  30 A to  30 P, thereby reducing the revelation of the seam that may be perceived in the gap G. Hereinafter, a positional technical feature between the first display module  30 A and the second display module  30 E of the display apparatus  1  according to the embodiment of the disclosure will be additionally described with reference to  FIG. 7 . As described above, the first display module  30 A and the second display module  30 E are taken as an example of the plurality of display modules  30 A to  30 P, and thus the positional technical feature may be applied to all of the plurality of display modules  30 A to  30 P. 
       FIG. 7  is a cross-sectional view illustrating some components of the display apparatus shown in  FIG. 1 . 
     The plurality of inorganic light emitting diodes  50  mounted on the plurality of display modules  30 A to  30 P may be disposed at regular intervals. When some of the plurality of inorganic light emitting diodes  50  are arranged at different intervals, a part of the entire display image of the display panel  20  may be distorted. 
     When the interval between the plurality of inorganic light emitting diodes  50  mounted on each of the display module  30 A to  30 P is referred to as a pitch p, the plurality of inorganic light emitting diodes  50  mounted on each of the display module  30 A to  30 P may have the same pitch p. 
     In addition, with regard to one display module (the first display module  30 A) and another display module (the second display module  30 E) adjacent to the one display module  30 A among the plurality of display modules  30 A to  30 P, the interval between an inorganic light emitting diode  50  on the one display module  30 A adjacent to the other display module  30 E and an inorganic light emitting diode  50  on the other display module  30 E adjacent to the one display module  30 A may be provided with the same pitch p. 
     This is to prevent the screen of the display panel  20  from being distorted even at the boundaries between the display modules  30 A to  30 P. 
     The above configuration may be applied not only to the first and second display modules  30 A and  30 E, which will be described below, but also to other display modules adjacent to each other in the second direction Y or the third direction Z among the plurality of display modules  30 A- 30 P. 
     The plurality of inorganic light emitting diodes  50  mounted on the first display module  30 A and the second display module  30 E may be disposed at the same pitch p. 
     The interval between a first inorganic light emitting diode  50   a  and a second inorganic light emitting diode  50   b  mounted on the first display module  30 A and the interval between a third inorganic light emitting diode  50   c  and a fourth inorganic light emitting diode  50   d  mounted on the second display module  30 E may have the same pitch p. 
     In addition, the interval between the inorganic light emitting diode  50   a  among the plurality of inorganic light emitting diodes  50  mounted on the first display module  30 A that is closest to the side surface  45   a  of the substrate  40  of the first display module  30 A adjacent to the second display module  30 E in the second direction Y and the inorganic light emitting diode  50   b  among the plurality of inorganic light emitting diodes  50  mounted on the second display module  30 E that is closest to the side surface  45   a  of the substrate  40  of the second display module  30 E adjacent to the first display module  30 A in the second direction Y may be equal to the pitch p. 
     That is, the interval between the first inorganic light emitting diode  50   a  on the first display module  30 A adjacent to the second display module  30 E in the second direction Y and the third inorganic light emitting diode  50   c  on the second display module  30 E adjacent to the first display module  30 A in the second direction Y may also be provided as the pitch p. 
     In this way, in order to provide the interval between the first inorganic light emitting diode  50   a  and the third inorganic light emitting diode  50   c  as the pitch p, the sum of a length L 1  between the first inorganic light emitting diode  50   a  and the edge  41   e  of the mounting surface  41  of the substrate  40  in the second direction Y and a length L 2  of the first region  101 A or  201 A of the molding  100 A or the front cover  200 A in the second direction Y may be provided to as half of the pitch p. 
     In addition, the sum of a length L 1  between the third inorganic light emitting diode  50   c  and the edge  41   e  of the mounting surface  41  of the substrate  40  in the second direction Y and a length L 2  of the first region  101 E or  201 E of the molding  100 E or the front cover  200 E in the second direction Y may be provided to as half of the pitch p. 
     When the first display module  30 A and the second display module  30 E are disposed adjacent to each other in the second direction Y, first regions  101 A and  201 A of the molding  100 A and the front cover  200 A of the first display module  30 A may be arranged to come in contact with the first regions  101 E and  201 E of the molding  100 E and the front cover  200 E of the second display module  30 E. 
     A separation d (see  FIG. 5 ) may exist between the first regions  101 A and  201 A of the molding  100 A and the front cover  200 A of the first display module  30 A and the first regions  101 E and  201 E of the molding  100 E and the front cover  200 E of the second display module  30 E, but the separation d is measured in micrometers, which is small enough to be ignored. 
     In this case, in an area between the first inorganic light emitting diode  50   a  and the third inorganic light emitting diode  50   c,  the edge  41   e  of the mounting surface  41  of the substrate  40  of the first display module  30 A outside of the first inorganic light emitting diode  50   a  in the second direction Y, and the first region  101 A and  201 A of the molding  100 A and the front cover  200 A of the first display module  30 A extending in the second direction Y, the edge  41   e  of the mounting surface  41  of the substrate  40  of the second display module  30 E outside of the third inorganic light emitting diode  50   c  in the second direction Y, and the first region  101 E and  201 E of the molding  100 E and the front cover  200 E of the second display module  30 E extending in the second direction Y may be disposed. 
     Accordingly, the distance between the first inorganic light emitting diode  50   a  and the third inorganic light emitting diode  50   c  may be obtained by the sum of a length L 1  from the first inorganic light emitting diode  50   a  to the edge  41   e  in the second direction Y, a length L 2  of the first region  101 A or  201 A of the molding  100 A or the front cover  200 A extending in the second direction Y, a length L 1  from the third inorganic light emitting diode  50   c  to the edge  41   e  of the mounting surface  41  in the second direction Y, and a length L 2  of the first region  101 E or  201 E of the molding  100 E or the front cover  200 E extending in the second direction Y. 
     Since the sum of L 1  and L 2  is formed at half the pitch p as described above, the distance between the first inorganic light emitting diode  50   a  and the third inorganic light emitting diode  50   c  may be formed as a pitch p. 
     The second layer  220  may be formed as a light transmittance control layer as described above, but the disclosure is not limited thereto, and the second layer  220  may be provided as a circular polarization layer. That is, the second layer  220  may include a polarizing member provided to polarize light incident from the outside. In addition, the second layer  220  may be formed of a material provided to pass only light in a specific polarization range and absorb light outside the specific polarization range. 
     Hereinafter, for the sake of convenience in description, the second layer  220  will be illustrated as a circular polarization layer  220 . That is, the first layer  210  may be provided as an anti-glare layer  210  and the second layer  220  may be provided as a circular polarization layer  220 . 
     The circular polarization layer  220  may pass only light having a specific phase in the transmitted light and absorb light having the other phase, thereby reducing the transmittance of light passing through the circular polarization layer  220 . 
     The circular polarization layer  220  may include a linearly polarizing member and a circularly polarizing member. For example, the circular polarization layer  220  may be provided by overlapping a linear polarization film and a circular polarization film. The linear polarization film and the circular polarization film may be sequentially disposed in the first direction X. 
     In detail, the linearly polarizing film and the circular polarizing film of the circular polarization layer  220  may change the phase of external light incident from the outside of the display module  20 . The circular polarization layer  220  prevents external light having a phase changed due to passing therethrough that is reflected from the substrate  40  or the gap G and then is redirected to the circular polarization layer  220  from passing through the circular polarization layer  220  based on the changed phase. 
     Accordingly, at least a part of external light incident on the display module  20  may be absorbed by the circular polarization layer  220  without being reflected to the outside. That is, the circular polarization layer  220  may pass only light having a specific phase in the transmitted light and absorb light having a phase out of the specific phase. 
     Accordingly, the circular polarization layer  220  absorbs part of light transmitted through the circular polarization layer  220  and reflected from the substrate  40  or the gap G, in particular, the light reflected from the gap G, to thereby lower the revelation of a seam perceived in the gap G. 
     As described above, when the second layer  220  is provided as the light transmittance control layer  220 , the degree of transmission of light may be adjusted by adjusting the transparency of the material of the second layer  220 . In contrast, when the second layer  220  is provided as the circular polarization layer  220 , the degree to which light reflected from the substrate  40  or the gap G is transmitted back to the outside again may be adjusted through the phase difference of light. 
     As described above, the molding  100  and the front cover  200  may be arranged in the gap G in the first direction X. 
     Accordingly, external light incident onto the display module  20  may pass through the anti-glare layer  210 ,the circular polarization layer  220 , and the molding  100  to enter the gap G. In this case, the incident light may be diffusely reflected by the anti-glare layer  210  without entering the gap G, and only part of light having a specific phase is allowed to enter the gap G and the remaining is absorbed by the circular polarization layer  220 . 
     In addition, the light reflected from the gap G may be directed to the outside by sequentially passing through the molding  100 , the circular polarization layer  220 , and the anti-glare layer  210 , in which case light passing through the circular polarization layer  220  and having a phase out of a specific phase is absorbed by the circular polarization layer  220  without being transmitted to the outside. 
     As described above, the first layer  210  may be formed as an anti-glare layer, but is not limited thereto and may be formed as an anti-reflect layer. That is, the first layer  210  may include a material that reflects externally incident light to the outside of the display panel  20  that is not the direction of the substrate  40  or the gap G, or a configuration that reflects externally incident light to the outside of the display panel  20  that is not the direction of the substrate  40  or the gap G. 
     Hereinafter, for the sake of convenience in description, the first layer  210  will be illustrated as an anti-reflect layer  210 . That is, the first layer  210  may be provided as an anti-reflect layer  210  and the second layer  220  may be provided as a light transmittance control layer  220 . 
     As described above, the anti-reflect layer  210  may reflect external light incident onto the display panel  20  to the outside of the display panel  20  that is not the direction of the substrate  40  or the gap G. Accordingly, the amount of light passing through the anti-reflect layer  210  that is incident onto the gap G may be reduced. 
     Accordingly, the reflectance of external light incident onto the display panel  20  that is incident to the gap G is lowered, thereby improving the sense of unity of the screen of the display module  20 . 
     The anti-reflect layer  210  may include a plurality of layers having different refractive indices. When external light is incident onto the anti-reflect layer  210 , the external light may be subject to internal reflection due to the difference in refractive indices of the plurality of layers and thus travel to the outside of the display panel  20  rather than to the substrate  40  or the gap G. 
     Accordingly, the anti-reflect layer  210  allows only part of light transmitted therethrough to be transmitted to the substrate  40  or the gap G and absorbs the remaining light, in particular, part of the light directed to the gap G to thereby reduce the revelation of the seam perceived in the gap G and reduce the revelation of the boundary between the plurality of display modules  30 A to  30 P. 
     Conversely, the anti-reflect layer  210  may be provided such that light reflected from the gap G or the substrate  40  and incident onto the anti-reflect layer  210  is subject to internal reflection and thus prevented from being transmitted in the first direction X. For example, light from the gap G in the first direction X is transmitted in a direction corresponding to the second direction Y or the third direction Z by the anti-reflect layer  210 , so that the reflectance of external light on the display panel  20  is reduced, and revelation of the boundary between the plurality of display modules  30 A to  30 P is reduced. 
     Accordingly, only a part of the light reflected from the substrate  40  or the gap G is transmitted through the anti-reflect layer  210 , so that the revelation of the seam perceived in the gap G is reduced, and the sense of unity of the screen of the display panel  20  is improved. 
     As described above, when the first layer  210  is provided as the anti-glare layer  210 , the reflectance of external light may be adjusted by allowing the external light to be diffusely reflected on the surface of the anti-glare layer  210 , and when the first layer  210  is provided as the anti-reflect layer  210 , the degree of transmission of light may be adjusted by adjusting the reflection direction of light through the anti-reflect layer  210 . 
     Accordingly, external light incident onto the display module  20  may sequentially pass through the anti-reflect layer  210 , the light transmittance control layer  220 , and the molding  100  to enter the gap G. In this case, at least a part of the incident light may be prevented from entering the gap G due to the anti-reflect layer  210  and the light transmittance control layer  220 . 
     In addition, light reflected from the gap G may be transmitted to the outside by sequentially passing through the molding  100 , the light transmittance control layer  220 , and the anti-reflect layer  210 , in which a part of light passing through the light transmittance control layer  220  and the anti-reflect layer  210  may be prevented from being directed to the front of the display panel  20 . 
     Hereinafter, a case where the first layer  210  is provided as the anti-reflect layer  210  and the second layer  220  is provided as the circular polarization layer  220  will be described. 
     For the sake of convenience in description, the first layer  210  will be illustrated an anti-reflect layer  210  and the second layer  220  will be illustrated as a circular polarization layer  220 . That is, the first layer  210  may be provided as an anti-reflect layer  210  and the second layer  220  may be provided as a light transmittance control layer  220 . 
     The anti-reflect layer  210  reflects external light incident onto the display panel  20  to the outside of the display panel  20  that is not the direction of the substrate  40  or the gap G to thereby reduce the amount of external light passing through the anti-reflect layer  210 . Accordingly, the reflectance of external light introduced into the display panel  20  that is incident onto the gap G may be reduced, so that the sense of unity of the screen of the display module  20  may be improved. 
     The circular polarization layer  220  may pass only light having a specific phase in the transmitted light and absorb light having a phase out of the specific phase. 
     Accordingly, only a part of the light passing through the anti-reflect layer  210  is transmitted to the substrate  40  or the gap G, and the amount of light directed to the gap G is reduced due to internal reflection of the anti-reflect layer  210 . Only a part of light transmitted through the anti-reflect layer  210  that has a specific phase may pass through the circular polarization layer  220  and move to the substrate  40  or the gap G, and the remaining light may be absorbed by the circular polarization layer  220 . 
     Conversely, light reflected from the gap G or the substrate  40  and transmitted through the circular polarization layer  220  and the anti-reflect layer  210  is partially absorbed by the circular polarization layer  220  or is subject to internal reflection of the anti-reflect layer  210  without being transmitted in the first direction X, so that the reflectance of light reflected from the gap G in the display panel  20  is reduced, and thus the sense of unity of the screen of the display module  20  may be improved. 
     Accordingly, in particular, the amount of light directed to the gap G is reduced, so that the reflectance itself is reduced, and the amount of light reaching the gap G that is reflected to the outside of the display  20  is reduced, so that the revelation of the seam perceived in the gap G is reduced, and the sense of unity of the screen of the display module  20  may be improved. 
     Further, the disclosure is not limited to the above, and the first layer  210  may include both the anti-reflect layer and the anti-glare layer described above. That is, the first layer  210  may be configured in a stacked form such that an anti-reflect layer and an anti-glare layer are layered. 
     The anti-glare layer may diffusely reflect light incident onto the first layer  210  from the outside, and the anti-reflect layer may induce a reflection direction of light such that light incident onto the first layer  210  is reflected outside with respect to the first direction X of the display panel  20 . 
     In this way, the first layer  210  may reduce the reflectance of external light incident onto the display panel  20  through the anti-glare layer and the anti-reflect layer. 
     The anti-glare layer and the anti-reflect reflective layer may be sequentially arranged in the first direction X. 
     When the first layer  210  is formed in a stacked structure of an anti-glare layer and an anti-reflect layer, the second layer  220  may be provided as a light transmittance control layer  220  as described above. 
     The second layer  220  provided as a light transmittance control layer may reduce the transmittance of incident external light or external light reflected from the substrate  40  and the gap G, as described above. 
     The first layer  210  and the second layer  220  are provided to allow only a part of light passing therethrough to be transmitted to the substrate  40  or the gap G. 
     The incident light may be diffusely reflected or direction-changed through internal reflection by the first layer  210 , and may be absorbed by the second layer  220  so that the amount of light, in particular, light directed to the gap G may be reduced. 
     Conversely, when light reflected from the gap G or the substrate  40  sequentially passes through the second layer  220  and the first layer  210 , the light may be absorbed by the second layer  220  or may be prevented from passing through the display panel  20  in the first direction X by the first layer  210 . 
     Accordingly, as the amount of light, in particular, light directed to the gap G is reduced, the reflectance itself is reduced, and the amount of light reaching the gap G that is reflected from the gap G to the outside of the display module  20  is reduced, so that the revelation of a seam perceived in the gap G may be reduced, and the sense of unity of the screen of the display module  20  may be improved. 
     In addition, when the first layer  210  is formed in a stacked structure of an anti-reflect layer and an anti-glare layer, the second layer  220  may be provided as a circular polarization layer. As described above, the first layer  210  may reduce the reflectance of external light incident onto the display panel  20  through the anti-reflect layer and the anti-glare layer. 
     In addition, the second layer  220  may polarize external light passing therethrough, absorb external light having a phase out of a specific phase, and absorb external light reflected from the substrate  40  and the gap G that has a phase out of the specific phase to prevent the reflected external light from passing through the second layer  220 . The front cover  200  is configured such that incident light is diffusely reflected or direction-changed through internal reflection by the first layer  210 , and light passing through the first layer  210  and reaching the second layer  220  is polarized by the second layer  220  so that a part of light having a specific phase passes through the second layer  220  and the remaining light having a phase out of the specific phase is absorbed by the second layer  220 . The front cover  200  may reduce the amount of light, in particular, light directed to the gap G so that the revelation of a seam perceived in the gap G may be reduced. 
     Conversely, as for at least a part of light reflected from the substrate G and the gap G that is transmitted through the circular polarization layer  220 , light having a phase out of a specific phase is absorbed by the second layer  220  and is prevented from passing through the first layer  210  and exiting the display panel  20  in the first direction X. 
     Accordingly, as the amount of light, in particular, light directed to the gap G is reduced, the reflectance itself is reduced, and the amount of light reaching the gap G that is reflected from the gap G and directed to the display module  20  is reduced, so that the revelation of a seam perceived in the gap G may be reduced, and the sense of unity of the screen of the display module  20  may be improved. 
     Unlike the adhesive layer  230  described as being formed of a transparent material in the above, the adhesive layer  230  may be formed of a different component. 
     In detail, the adhesive layer  230  may be formed of a material capable of absorbing at least a portion of light transmitting through the adhesive layer  230 . For example, the adhesive layer  230  may be partially opaque. 
     That is, the adhesive layer  230  may reduce the transmittance of light incident onto the adhesive layer  230  similar to the light transmittance control layer described above, to serve as a light transmittance control layer. 
     In this case, the second layer  220  may be provided as a transparent layer formed of a transparent material. Hereinafter, for the sake of convenience in description, the second layer  220  is illustrated as a transparent layer  220 . 
     The transparent layer  220  may be disposed between the first layer  210  and the adhesive layer  230 . 
     The transparent layer  220  may be in a highly transparent state having a transmittance of 90% or more, such as an optical clean resin (OCR). 
     This is because the adhesive layer  230  lowers the transmittance of light passing through the display panel  20 , further lowering of the transmittance of light may lower the brightness of the screen of the display panel  20  itself. 
     Accordingly, the transparent layer  220  may be formed of a transparent material so that light incident onto the transparent layer  220  is easily transmitted therethrough. 
     The disclosure is not limited thereto, and the transparent layer  280  may be omitted from the front cover  200 . 
     In this case, the first layer  210  may be provided in any one structure including an anti-glare layer, an anti-reflect layer, or an anti-glare layer and anti-reflect layer stacked on each other. 
     The front cover  200  may allow only a part of light transmitted through the first layer  210 , the transparent layer  220 , and the adhesive layer  230  to be transmitted to the substrate  40  or the gap G. 
     With the front cover  200 , incident light is diffusely reflected or is deflected by the first layer  210  and then is absorbed by the adhesive layer  230  so that the amount of light directed to the gap G may be reduced. Conversely, with the front cover  200 , at least a part of light reflected from the gap G or the substrate  40  is absorbed by the adhesive layer  230  and so as not to pass through the first layer  210  and the display panel  20  in the first direction X. 
     Accordingly, as the amount of light, in particular, light directed to the gap G is reduced, the reflectance itself is lowered, and the amount of light reaching the gap G that is reflected from the gap G to the outside of the display module  20  is reduced, the revelation of a seam in the gap G may be reduced and the sense of unity of the screen of the display module  20  may be improved. Hereinafter, a method of manufacturing a display apparatus according to an embodiment of the disclosure will be briefly described with reference to  FIGS. 1 to 7 . 
       FIG. 8  is a flowchart showing a method of manufacturing a display apparatus according to an embodiment of the disclosure. 
     First, a display module  30  including a plurality of inorganic light emitting diodes  50  is prepared (operation  501 ). The plurality of inorganic light emitting diodes  50  are mounted on a mounting surface  41  of a substrate  40  of the display module  30 . In order to improve contrast between colors generated by red, green, and blue inorganic light emitting diodes  50 , the substrate  40  may include a light absorbing layer  60 . The substrate  40  may also include an anisotropic conductive layer  70  so that the plurality of inorganic light emitting diodes  50  are electrically connected to the substrate  40 . 
     In addition, the black matrix  80  may be formed on the anisotropic conductive layers  70  of the plurality of display modules  30 A to  30 P. 
     Next, the molding  100  is formed on the mounting surface  41  of the display module  30  (operation  502 ). The molding  100  may cover the entire area of the substrate  40 , including the mounting surface  41 . The molding  100  may be formed through a compression hardening process on the mounting surface  41 . 
     The molding  100  may cover not only the mounting surface  41 , but also the chamfer portion  49  and the side surface  45  of the substrate  40 . 
     Next, the front cover  200  is bonded to the molding  100  (operation  503 ). The front cover  200  includes the bonding layer  230  provided to be bonded to the molding  100 , and the front cover  200  may be bonded to the outer surface of the molding  100  by the bonding layer  230 . 
     Next, the molding  100  and the front cover  200  are cut such that at least portions of the molding  100  and the front cover  200  extend outside of the substrate  40  in the second direction Y perpendicular to the first direction X facing the mounting surface  41  (operation  504 ). 
     In detail, the molding  100  and the front cover  200  may be cut to form the first regions  101  and  201  of the molding  100  and the front cover  200  outside the mounting surface  41  in the second direction Y. 
     The cutting process may be performed by laser cutting or the like. 
     The cutting process may also be performed to form the first regions  101  and  201  of the molding  100  and the front cover  200  outside the mounting surface  41  in the third direction Z perpendicular to the first direction X and the second direction Y, in addition to the second direction Y. 
     That is, the molding  100  and the front cover  200  may be cut to have the first regions  101  and  201  extending outward of the four sides of the mounting surface  41 . 
     In an embodiment, the molding  100  and the front cover  200  may be cut in the first direction X. In this manner, when the plurality of display modules  30 A to  30 P are tiled, a gap between the display modules  30 A to  30 P may be minimized as described above. 
     In addition, when the molding  100  and the front cover  200  are cut obliquely with respect to the first direction X and the plurality of display modules  30 A to  30 P are tiled, the molding  100  or the front cover  200  may fail to be disposed in the gap G formed between the plurality of display modules  30 A to  30 P. 
     In the cutting process, the first regions  101  and  201  extending outside the mounting surface  41  may be processed to have a length smaller than or equal to approximately half of a length of a gap formed between the display modules  30  that may be provided a plurality of display modules  30 A to  30 P. 
     Next, the display module  30  processed as the above may be prepared as a plurality of the display modules  30 A to  30 P, and the plurality of display modules  30 A to  30 P may be disposed adjacent to each other (operation  505 ). In this case, the plurality of display modules  30 A to  30 P may be fixed through a jig. The plurality of display modules  30 A to  30 P may be arranged in an M*N matrix form. 
     Accordingly, when the plurality of display modules  30 A to  30 P are arranged adjacent to each other, the first regions  101  and  201  of the molding  100  and the front cover  200  extending from each of the display modules  30 A to  30 P may be disposed in the gap G formed between the plurality of display modules  30 A to  30 P. 
     Hereinafter, a display apparatus according to another embodiment of the disclosure will be described. Components other than a molding  100  and a front cover  300  to be described below are the same as those of the display apparatus  1  according to the above-described embodiments, and thus descriptions thereof will be omitted. 
       FIG. 9  is an enlarged cross-sectional view illustrating some components of a display apparatus according to another embodiment of the disclosure. 
     The molding  100  may include a light absorption pattern  110  formed on an upper surface of the molding  100  in the first direction X and configured to absorb light directed to the substrate  40  or the gap G. 
     The light absorption pattern  110  may be formed of a material similar to the black matrix  80 . 
     The light absorption pattern  110  may be formed in a lattice shape having a horizontal pattern and a vertical pattern to be disposed between pixels in the first direction X. 
     The light absorption pattern  110  may be formed by applying a light-absorbing ink on the molding  100  through an ink-jet process and then curing the light-absorbing ink, or may be formed by coating a light-absorbing film on the molding  100 . 
     That is, the light-absorbing pattern  110  may be located in a space corresponding, in the first direction X, to a space between the plurality of inorganic light emitting diodes  50  in which the plurality of inorganic light emitting diodes  50  are not mounted. 
     The light absorption pattern  110  may be formed of a black-based material that absorbs light effectively in order to maximize the light absorption effect. In an embodiment, the light absorption pattern  110  may have a color corresponding to the black matrix  80 . 
     In order to emphasize that the light absorption pattern  110  is a component formed on the upper surface of the molding  100  that is discriminated from the black matrix  80  formed on the mounting surface  41 , the light absorption pattern  110  is named as such, but the light absorption pattern  110  may have the same component as the black matrix  80 . 
     The light absorption pattern  110  may be disposed at a position corresponding to the black matrix  80  in the first direction X. 
     The light absorption pattern  110  may not be disposed at a position, in which the plurality of inorganic light emitting diodes  50  are disposed, in the first direction X. This is to prevent light emitted from the plurality of inorganic light emitting diodes  50  from being absorbed by the light absorption pattern  110 . Accordingly, the light efficiency of the display panel  20  may be increased. 
     Additionally, the light absorption pattern  110  may extend to the outside of the substrate  40  in the second direction Y. 
     That is, the light absorption pattern  110  may include a first region  101  corresponding to the first region  101  of the molding  100  in the first direction X and a second region  112  corresponding to the second region  102  of the molding  100  in the first direction X. 
     Light incident onto the display panel  20  that is directed to the gap G may be absorbed by the first region  111  of the light absorption pattern  110 . 
     In addition, light reflected from the gap G may be absorbed by the first region  111  of the light absorption pattern  110 . Accordingly, as the first region  111  of the light absorption pattern  110  capable of absorbing light is disposed in the gap G in the first direction X, the revelation of a seam perceived in the gap G may be reduced and the sense of unity of the screen of the display panel  20  may be increased. 
     The front cover  300  may be disposed on the plurality of display modules  30 A to  30 P in the first direction X. 
     Unlike the front cover  200  disclosed in the one embodiment and the another embodiment of the disclosure described above, the front cover  300  according to the embodiment of the disclosure may be formed as a single unit. 
     That is, in the case of the front cover  200  disclosed in the one embodiment and the another embodiment of the disclosure, the front covers  200  are formed on the plurality of display modules  30 A to  30 P so that when the display modules  30 A to  30 P are tiled, the front covers  220  are also provided to be tiled 
     However, the front cover  300  according to the disclosure is formed as a single unit, and may be disposed on the plurality of display modules  30 A to  30 P after the plurality of display modules  30 A to  30 P are tiled. 
     The front cover  300  may include a cover glass  310  provided to protect the substrate  40  from external force and a front layer  320  disposed on an upper side of the cover glass  310  in the first direction X and configured to absorb at least part of light incident onto the front cover  300  or adjust the reflection direction of the light to reduce light transmittance. 
     The front layer  320  may include at least one of the anti-glare layer, the anti-reflect layer, the circular polarization layer, or the light transmittance control layer described in the above embodiments of the disclosure. 
     As is apparent from the above, the display apparatus according to the embodiment absorbs light incident onto or reflected from a gap between display modules adjacent to each other, thereby providing a seamless effect that a seam is prevented from being visually perceived. 
     The display apparatus according to the embodiment of the disclosure includes a plurality of display modules that individually include components configured to absorb light incident onto or reflected from a gap between adjacent display modules, thereby easily and efficiently implementing the seamless effect even when assembled. 
     The foregoing exemplary embodiments are merely exemplary and are not to be construed as limiting. The present teaching can be readily applied to other types of apparatuses. Also, the description of the exemplary embodiments is intended to be illustrative, and not to limit the scope of the claims, and many alternatives, modifications, and variations will be apparent to those skilled in the art.