Display module and display device having the same

Abstract

A display module and a display apparatus having the same are provided. A display module includes a substrate including a mounting surface, a side surface, and a chamfered portion formed between the mounting surface and the side surface; a plurality of inorganic light emitting diodes mounted on the mounting surface and each including a pair of electrodes electrically connected to the substrate; a black matrix arranged between the plurality of inorganic light emitting diodes; and a cover bonded to the mounting surface and configured to cover the mounting surface, wherein the pair of electrodes is oriented in a direction opposite to a direction in which the plurality of inorganic light emitting diodes emit light, and the cover is provided to extend beyond the side surface in an extension direction of the mounting surface.

Description

Technical Field

[0001] This disclosure relates to a display device for displaying images via interconnected modules, each module having a self-emitting inorganic light-emitting diode mounted on its substrate. Background Technology

[0002] A display device is an output device that visually displays data information (such as characters and numbers, images, etc.). Display devices have been developed using backlit liquid crystal panels or organic light-emitting diode (OLED) panels formed from organic compound films that emit light in response to electric current. Summary of the Invention

[0003] One object of this disclosure is to provide a display device and a method for manufacturing the display device, specifically, to provide a display module suitable for a large-size display, a display device having the display module, and a method for manufacturing the display device.

[0004] Further aspects of this disclosure will be set forth in part in the description which follows, and may be learned by practice of this disclosure.

[0005] According to one aspect of this disclosure, a display module is provided, the display module comprising: a substrate including a mounting surface, a side surface, and a chamfered portion formed between the mounting surface and the side surface; a plurality of inorganic light-emitting diodes mounted on the mounting surface and each including a pair of electrodes electrically connected to the substrate; a black matrix disposed between the plurality of inorganic light-emitting diodes; and a cover engaged to the mounting surface and configured to cover the mounting surface, wherein the pair of electrodes are oriented in a direction opposite to the direction of light emission of the plurality of inorganic light-emitting diodes, and the cover is provided to extend beyond the side surface in a direction extending from the mounting surface.

[0006] The cover may include a first region disposed outside the mounting surface in the extension direction of the mounting surface and a second region disposed on the mounting surface.

[0007] The cover may include a first layer on the outermost side of the display module in the direction facing the mounting surface, a second layer disposed behind the first layer, and an adhesive layer disposed behind the second layer to attach the cover to the mounting surface.

[0008] The first layer may include at least one of an anti-glare layer and an anti-reflective layer.

[0009] The second layer may include a light transmittance control layer configured to reduce light transmittance.

[0010] The second layer may include a circular polarization layer.

[0011] The second layer can be formed to be transparent, and the adhesive layer can include opaque materials to reduce light transmittance.

[0012] The outermost end of the cover in the extension direction of the mounting surface may include an inclined surface that is inclined relative to the side surface, and the length of the upper section of the cover in the extension direction of the mounting surface is greater than the length of the lower section of the cover in the extension direction of the mounting surface.

[0013] The cover may also include a light-absorbing layer configured to cover the inclined surface of the outermost end of the cover in the direction of extension of the mounting surface and to include a light-absorbing material.

[0014] The substrate may have four side surfaces corresponding to the four edges of the mounting surface, and the cover may be provided to extend in the extending direction of the mounting surface beyond the four side surfaces corresponding to the four edges of the mounting surface.

[0015] Each inorganic light-emitting diode can be supplied as a flip-chip LED.

[0016] Each inorganic light-emitting diode may include a light-emitting surface formed in the direction facing the mounting surface and a bottom surface formed on the side opposite to the light-emitting surface, and the pair of electrodes may be arranged on the bottom surface.

[0017] According to another aspect of this disclosure, a display device is provided, the display device including a display module array in which a plurality of display modules are arranged in an M×N matrix, wherein each display module includes: a substrate including a mounting surface, a side surface, and a chamfered portion formed between the mounting surface and the side surface; a plurality of inorganic light-emitting diodes mounted on the mounting surface and each including a pair of electrodes electrically connected to the substrate; a black matrix disposed between the plurality of inorganic light-emitting diodes; and a cover engaged to the mounting surface and configured to cover the mounting surface, wherein the pair of electrodes are oriented in a direction opposite to the direction of light emission of the plurality of inorganic light-emitting diodes, and the cover is provided to extend beyond the side surface in an extending direction of the mounting surface such that at least a portion of the cover is disposed in a gap formed between the plurality of display modules.

[0018] The plurality of display modules may include a first display module and a second display module arranged adjacent to the first display module, and the length of the gap in the extension direction of the mounting surface may be provided to be greater than the length of the interval between the cover of the first display module and the cover of the second display module.

[0019] The outermost ends of the covers of the first and second display modules in the direction adjacent to each other can be formed as inclined surfaces that are inclined relative to the side surfaces of the first and second display modules. The separation distance between the upper side of the cover of the first display module in the direction facing the mounting surface and the upper side of the cover of the second display module in the direction facing the mounting surface in the extension direction of the mounting surface is shorter than the separation distance between the lower side of the cover of the first display module in the direction facing the mounting surface and the lower side of the cover of the second display module in the direction facing the mounting surface in the extension direction of the mounting surface.

[0020] The distance between the lower side of the cover of the first display module facing the mounting surface and the lower side of the cover of the second display module facing the mounting surface in the direction of extension of the mounting surface is shorter than the distance between the gap between the first display module and the second display module in the direction of extension of the mounting surface.

[0021] The inclined surfaces of the covers of the first and second display modules may have an inclined angle smaller than the inclined angle of the chamfered portions of the first and second display modules.

[0022] The cover may include: a first layer disposed on the outermost side of the display module in the direction facing the mounting surface, and including at least one of an anti-glare layer and an anti-reflective layer; a second layer disposed behind the first layer; and an adhesive layer disposed behind the second layer to bond the cover to the mounting surface.

[0023] The substrate may have four side surfaces corresponding to the four edges of the mounting surface, and the cover may be provided to extend in the extending direction of the mounting surface beyond the four side surfaces corresponding to the four edges of the mounting surface.

[0024] Each inorganic light-emitting diode may include a light-emitting surface formed in the direction facing the mounting surface and a bottom surface formed on the side opposite to the light-emitting surface, and the pair of electrodes may be arranged on the bottom surface. Attached Figure Description

[0025] These and / or other aspects of this disclosure will become apparent and more readily understood from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0026] Figure 1 This is a view showing a display device according to an embodiment of the present disclosure;

[0027] Figure 2 It is shown Figure 1 An exploded view of the main components of the display device shown;

[0028] Figure 3 It is shown Figure 1An enlarged sectional view of one or more components shown;

[0029] Figure 4 It is shown Figure 1 A cross-sectional view of one or more components of the display device shown;

[0030] Figure 5 It is shown Figure 4 Enlarged view of one or more other components shown;

[0031] Figure 6 This is a flowchart illustrating a method for manufacturing a display device according to an embodiment of the present disclosure;

[0032] Figure 7 This is an enlarged cross-sectional view showing one or more components of a display device according to another embodiment of the present disclosure;

[0033] Figure 8 This is an enlarged cross-sectional view showing one or more components of a display device according to another embodiment of the present disclosure;

[0034] Figure 9 This is an enlarged cross-sectional view showing one or more components of a display device according to another embodiment of the present disclosure;

[0035] Figure 10 This is an enlarged cross-sectional view showing one or more components of a display device according to another embodiment of the present disclosure;

[0036] Figure 11 This is an enlarged cross-sectional view showing one or more components of a display device according to another embodiment of the present disclosure;

[0037] Figure 12 This is an enlarged cross-sectional view showing one or more components of a display device according to another embodiment of the present disclosure;

[0038] Figure 13 This is an enlarged cross-sectional view showing one or more components of a display device according to another embodiment of the present disclosure; and

[0039] Figure 14 This is an enlarged cross-sectional view showing one or more components of a display device according to another embodiment of the present disclosure. Detailed Implementation

[0040] Detailed embodiments of the claimed structures and methods are disclosed herein; however, it is to be understood that the disclosed embodiments are merely illustrative of the claimed structures and methods, which may be embodied in various forms. Such structures and methods may be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope to those skilled in the art.

[0041] In the following description, it will be understood that the singular forms “a,” “an,” and “the” include plural indicators unless the context clearly indicates otherwise. For the sake of clarity in this disclosure, irrelevant parts have not been shown, and for clarity, the dimensions of parts have been exaggerated.

[0042] It will also be understood that, when used in this specification, the terms “comprising,” “including,” and / or “having” indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof.

[0043] Furthermore, the meaning of "identical" in the specification can include having similar properties or similarities within a specific range. Additionally, "identical" means "substantially identical." It should be understood that "substantially identical" means values ​​falling within the tolerance range of manufacturing or values ​​having differences within a range that are not significant relative to a reference value.

[0044] Embodiments of this disclosure relate to a display device for displaying images via interconnected modules, each module having a self-emitting inorganic light-emitting diode mounted on its substrate.

[0045] As mentioned earlier, liquid crystal panels (LCDs) requiring backlighting or organic light-emitting diode (OLED) panels formed from organic compound films that emit light in response to current have been primarily used. However, LCDs have slow response times and high power consumption, and require backlighting due to their limited self-illumination, making it difficult to provide compact display devices. In contrast, OLEDs do not require backlighting because they emit light themselves, allowing for thinner designs. However, due to the use of the same organic materials, OLEDs have a shorter lifespan than LCDs and are prone to burn-in, a phenomenon where, when the same image is displayed for an extended period, certain parts of the image remain visible even when the image is switched due to the expiration of the subpixel's lifespan.

[0046] Therefore, it may be advantageous to replace LCD and OLED panels with micro-light-emitting diode (micro-LED or μLED) panels, which mount inorganic light-emitting devices on a substrate and use the inorganic light-emitting devices themselves as pixels.

[0047] A micro light-emitting diode display panel (hereinafter referred to as a micro LED panel) is a type of flat panel display panel that includes multiple inorganic light-emitting diodes (inorganic LEDs), each having a size of 100 micrometers or less.

[0048] Such LED panels are self-emitting devices, but as inorganic light-emitting devices, they are less prone to OLED burn-in and have excellent brightness, resolution, power consumption and durability.

[0049] Compared to LCD panels that require backlighting, micro-LED display panels offer better contrast, response time, and energy efficiency. Both OLED and micro-LED (i.e., inorganic LED) are energy-efficient, but micro-LEDs offer superior brightness, luminous efficiency, and lifespan compared to OLEDs.

[0050] Furthermore, micro LEDs can achieve substrate-level display modulation by arranging LEDs on a circuit board in units of pixels, and can provide various resolutions and screen sizes of displays according to customer instructions.

[0051] The embodiments according to this disclosure will be described in detail below with reference to the accompanying drawings.

[0052] Now refer to Figures 1-4 , Figure 1 This is a view illustrating a display device according to one or more embodiments of the present disclosure. Figure 2 It is shown Figure 1 The diagram shown is an exploded view of the main components of the display device. Figure 3 It is shown Figure 1 Enlarged sectional view of one or more components shown. Figure 4 It is shown Figure 1 A cross-sectional view of one or more components of the display device shown.

[0053] In the following description, the components of the display device 1 shown in the figures (including a plurality of inorganic light-emitting diodes 50) are components in a miniature unit with a size of a few μm to a few hundred μm. For ease of description, the size of some components shown in the figures (a plurality of inorganic light-emitting diodes 50, a black matrix 80 (e.g., a black matrix) etc.) may be exaggerated.

[0054] Display device 1 is a device that displays information, materials, data, etc. as characters, numbers, charts, images, etc., and can be implemented as a television set (TV), personal computer (PC), mobile device, digital signage, etc.

[0055] According to one or more embodiments of the present disclosure, the display device 1 includes a display panel 20 for displaying images, a power supply device for supplying power to the display panel 20, a main board 25 for controlling the overall operation of the display panel 20, a frame 21 for supporting the display panel 20, and a rear cover 10 covering the rear surface of the frame 21.

[0056] The display panel 20 may include: a plurality of display modules 30A to 30P; a driver board for driving each of the display modules 30A to 30P; and a timing controller (TCON) board for generating the timing signals required to control each of the display modules 30A to 30P.

[0057] The back cover 10 can support the display panel 20. The back cover 10 can be mounted on the ground by a bracket or on a wall by a hanging bracket.

[0058] Multiple display modules 30A to 30P can be arranged adjacent to each other in the vertical and horizontal directions. Multiple display modules 30A to 30P can be arranged in an M×N matrix. In one or more embodiments, 16 display modules 30A to 30P are provided and arranged in a 4×4 matrix, but there are no limitations on the number and arrangement of the multiple display modules 30A to 30P.

[0059] Multiple display modules 30A to 30P can be mounted on the frame 21. The multiple display modules 30A to 30P can be mounted on the frame 21 using various known methods (such as using the magnetic force of magnets or mechanical assembly structures). A rear cover 10 is attached to the rear of the frame 21, and the rear cover 10 forms the rear appearance of the display device 1.

[0060] As described above, the display device 1 according to one or more embodiments of the present disclosure can realize a large screen by tiling multiple display modules 30A to 30P.

[0061] According to one or more embodiments of this disclosure, each individual display module among the plurality of display modules 30A to 30P can be applied to a display device. The display modules 30A to 30P can be individually mounted on electronic products or machine parts, such as wearable devices, portable devices, handheld devices, and other various displays requiring various displays, or they can be assembled in a matrix form as in one or more embodiments and used in display devices, such as monitors for PCs, high-definition TVs and signage, and electronic displays.

[0062] Multiple display modules 30A to 30P can have the same configuration. Therefore, the description of any one of the display modules described below can be applied equivalently to all the other display modules.

[0063] One of the multiple display modules 30A to 30P (e.g., the first display module 30A) can be formed as a quadrilateral. Alternatively, the first display module 30A can be provided as a rectangle or a square.

[0064] Therefore, the first display module 30A may include edges 31, 32, 33 and 34 formed in the vertical and horizontal directions relative to the first direction X which is the forward direction.

[0065] Reference Figure 3 Each of the plurality of display modules 30A to 30P 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 a first direction X.

[0066] The substrate 40 can be formed in a quadrilateral shape. As described above, multiple display modules 30A to 30P can be formed in a quadrilateral shape, and the substrate 40 can be formed in a quadrilateral shape to correspond to each display module.

[0067] The substrate 40 can be provided in a rectangular or square shape.

[0068] Therefore, taking the first display module 30A as an example, the substrate 40 may include four edges corresponding to the edges 31, 32, 33 and 34 formed by the first display module 30A in the vertical direction and in the horizontal direction relative to the first direction X which is the forward direction.

[0069] 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 diode 50. The base substrate 42 may include a glass substrate. The substrate 40 may include a chip-on-glass (COG) type substrate. The substrate 40 may include a first pad electrode 44a and a second pad electrode 44b, which are provided to electrically connect the inorganic light-emitting diode 50 to the TFT layer 43.

[0070] The TFTs constituting the TFT layer 43 are not limited to a specific structure or type and can be configured in various embodiments. According to one embodiment of the present disclosure, the TFTs of the TFT layer 43 can be implemented not only as low-temperature polycrystalline silicon (LTPS) TFTs, oxide TFTs, or polycrystalline silicon or amorphous silicon (Si) TFTs, but also as organic TFTs, graphene TFTs, etc.

[0071] Furthermore, when the substrate 42 of the substrate 40 is formed from a silicon wafer, the TFT layer 43 can be replaced by a complementary metal-oxide-semiconductor (CMOS) transistor or an n-type or p-type metal-oxide-semiconductor field-effect transistor (MOSFET).

[0072] Multiple inorganic light-emitting diodes 50 may comprise inorganic light-emitting diodes formed of inorganic materials and having a width, length, and height, each of which is from a few micrometers (μm) to several hundred μm. Miniature inorganic light-emitting diodes may have a short side of 100 μm or less in their width, length, and height. The inorganic light-emitting diodes 50 can be picked up from sapphire or silicon wafers and directly transferred onto substrate 40. Multiple inorganic light-emitting diodes 50 may be picked up and transported by an electrostatic method using an electrostatic head or by an imprinting method using a flexible polymer material (such as polydimethylsiloxane (PDMS) or silicone resin) as the head.

[0073] Multiple inorganic light-emitting diodes 50 are light-emitting structures including an n-type semiconductor 58a, an active layer 58c, a p-type semiconductor 58b, a first contact electrode 57a, and a second contact electrode 57b.

[0074] One of the first contact electrode 57a and the second contact electrode 57b can be electrically connected to the n-type semiconductor 58a, and the other is provided to be electrically connected to the p-type semiconductor 58b.

[0075] The first contact electrode 57a and the second contact electrode 57b can be connected in the form of a controlled collapse chip connection or a "flip chip" to be arranged parallel to each other while facing the same direction (opposite to the direction of light emission).

[0076] The inorganic light-emitting diode 50 includes a light-emitting surface 54, a side surface 55, and a bottom surface 56. The light-emitting surface 54 is configured to face a first direction X when the inorganic light-emitting diode 50 is mounted on the mounting surface 41. The bottom surface 56 is disposed on the side opposite to the light-emitting surface 54. A first contact electrode 57a and a second contact electrode 57b may be formed on the bottom surface 56.

[0077] The contact electrodes 57a and 57b of the inorganic light-emitting diode 50 can be disposed on the side opposite to the light-emitting surface 54, so as to be disposed on the side opposite to and away from the light emission direction.

[0078] Therefore, when light generated from the active layer 58c is emitted through the light-emitting surface 54 in the first direction X, the light can be emitted in the first direction X without interfering with the first contact electrode 57a or the second contact electrode 57b.

[0079] The first contact electrode 57a and the second contact electrode 57b can be electrically connected to the first pad electrode 44a and the second pad electrode 44b formed on the mounting surface 41 side of the substrate 40, respectively.

[0080] As will be described below, the inorganic light-emitting diode 50 can be directly connected to the pad electrodes 44a and 44b through a bonding structure such as an anisotropic conductive layer 70 or solder, rather than through other structures.

[0081] An anisotropic conductive layer 70 may be formed on the substrate 40 to serve as a medium for inducing electrical bonding between contact electrodes 57a and 57b and pad electrodes 44a and 44b. The anisotropic conductive layer 70 may represent anisotropic conductive adhesive adhered to a protective film and have a structure in which conductive spheres 71 are dispersed in the adhesive resin. The conductive spheres 71 may be conductive spheres surrounded by a thin insulating film, and electrical connections occur between conductors when the insulating film ruptures due to pressure.

[0082] 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.

[0083] Therefore, when multiple inorganic light-emitting diodes 50 are mounted on the substrate 40, the pressure applied to the anisotropic conductive layer 70 causes the insulating film of the conductive ball 71 to break, so that the contact electrodes 57a and 57b of the inorganic light-emitting diodes 50 can be electrically connected to the pad electrodes 44a and 44b of the substrate 40.

[0084] However, multiple inorganic light-emitting diodes 50 can be mounted on the substrate 40 using solder instead of the anisotropic conductive layer 70. The inorganic light-emitting diodes 50 can be first positioned on the substrate 40, and then the inorganic light-emitting diodes 50 can undergo a reflow process to bond to the substrate 40.

[0085] Multiple inorganic light-emitting diodes 50 may include red light-emitting devices 51, green light-emitting devices 52, and blue light-emitting devices 53, and the inorganic light-emitting diodes 50 may be mounted on the mounting surface 41 of the substrate 40 as a unit, consisting of a series of red light-emitting devices 51, green light-emitting devices 52, and blue light-emitting devices 53. A series of red light-emitting devices 51, green light-emitting devices 52, and blue light-emitting devices 53 may form a pixel. In this case, each of the red light-emitting devices 51, green light-emitting devices 52, and blue light-emitting devices 53 may form a sub-pixel.

[0086] The red light-emitting device 51, the green light-emitting device 52, and the blue light-emitting device 53 can be arranged in rows at predetermined intervals as in one or more embodiments of this disclosure, or they can be arranged in different shapes such as triangles.

[0087] The substrate 40 may include a light-absorbing layer 60 that improves contrast by absorbing external light. The light-absorbing layer 60 may be formed integrally on the mounting surface 41 side of the substrate 40. The light-absorbing layer 60 may be formed between the TFT layer 43 and the anisotropic conductive layer 70.

[0088] The multiple display modules 30A to 30P may also include a black matrix 80 formed between multiple inorganic light-emitting diodes 50.

[0089] The black matrix 80 can perform a function that complements the light-absorbing layer 60, which is entirely formed on the mounting surface 41 side of the substrate 40. The black matrix 80 absorbs external light and causes the substrate 40 to exhibit one or more colors (such as black) to improve the screen's contrast. It can be understood that the black matrix 80 can be any color that improves the screen's contrast.

[0090] In one or more embodiments, the black matrix 80 is formed between pixels, each pixel being formed by a series of red light-emitting devices 51, green light-emitting devices 52, and blue light-emitting devices 53. In one or more embodiments, the black matrix 80 may be formed with higher precision and separate each of the light-emitting devices 51, 52, and 53 that serve as sub-pixels.

[0091] The black matrix 80 can be formed into a grid shape with horizontal and vertical patterns set between pixels.

[0092] A black matrix 80 can be formed by applying light-absorbing ink to the anisotropic conductive layer 70 via an inkjet process and curing the light-absorbing ink, or by coating the anisotropic conductive layer 70 with a light-absorbing film.

[0093] On the anisotropic conductive layer 70 that is completely formed on the mounting surface 41, the black matrix 80 can form gaps between a plurality of inorganic light-emitting diodes 50, in which no plurality of inorganic light-emitting diodes 50 are mounted.

[0094] The plurality of display modules 30A to 30P may include a front cover 100 disposed on the upper side of the mounting surface 41 in a first direction X to cover the mounting surface 41 of the plurality of display modules 30A to 30P respectively.

[0095] Reference Figure 4 Multiple front covers 100 can be provided to be formed on the upper side of multiple display modules 30A to 30P respectively in the first direction X.

[0096] Each of the plurality of display modules 30A to 30P can be assembled after forming a respective front cover 100. Taking the first display module 30A and the second display module 30E as examples among the plurality of display modules 30A to 30P, the first front cover 100A can be bonded to the mounting surface 41 of the first display module 30A, and the second front cover 100E can be formed on the mounting surface 41 of the second display module 30E. The first front cover 100A may include an anti-glare layer 110A, a light transmittance control layer 120A, and an adhesive layer 130A, and the second front cover 100E may include an anti-glare layer 110E, a light transmittance control layer 120E, and an adhesive layer 130E.

[0097] The front cover 100 can be provided to cover the front side of the mounting surface 41 and the substrate 40 to protect the substrate 40 from external forces. As will be described below, the front cover 100 can reduce the exposure of the seams formed by the gaps G formed between the plurality of display modules 30A to 30P and improve the color deviation between the plurality of display modules 30A to 30P.

[0098] The front cover 100 will be described in detail below.

[0099] Figure 5 It is shown Figure 4 Enlarged sectional views of the other components shown.

[0100] Since multiple display modules 30A to 30P are formed identically to each other, the multiple display modules 30A to 30P will be described with respect to the first display module 30A.

[0101] It can be understood that the configuration of multiple display modules 30A to 30P can be described with reference to display module 30, substrate 40 and front cover 100 as examples.

[0102] In addition, the first display module 30A and the second display module 30E, which are disposed adjacent to the first display module 30A in the second direction Y, will be described as needed.

[0103] Furthermore, since multiple display modules 30A to 30P are formed identically to each other, the front cover 100 formed on the multiple display modules 30A to 30P will be described as an example with respect to the first front cover 100A of the first display module 30A and the second front cover 100E of the second display module 30E.

[0104] One of the display manufacturing processes that uses display modules to realize a display panel is configured in such a way that: multiple display modules are arranged adjacent to each other; a single molded part is formed on the entire area of ​​the mounting surfaces of the multiple display modules and the gaps between the multiple display modules; a light-absorbing pattern is formed on the molded part; and a single front cover is formed together on the light-absorbing pattern.

[0105] Alternatively, another processing method is configured as follows: forming a light-absorbing pattern on a single front cover; and splicing multiple display modules to match the light-absorbing pattern, so that the light-absorbing pattern is arranged between the gaps between the multiple display modules.

[0106] Alternatively, another processing method is configured such that a light-absorbing pattern structure is pre-formed when a light-absorbing pattern is formed on a molded part or front cover before splicing multiple display modules. According to one or more embodiments, the display device 1 can be manufactured by attaching the front cover 100 to each of the multiple display modules 30A to 30P before splicing them. Furthermore, in order to absorb light reflected from the gap G between the multiple display modules 30A to 30P, the front cover 100 of each of the multiple display modules 30A to 30P can be formed to extend beyond the substrate 40 of each of the multiple display modules 30A to 30P.

[0107] Therefore, when multiple display modules 30A to 30P are spliced ​​together, the front cover 100 extending from each of the display modules 30A to 30P is arranged in the gap G between the multiple display modules 30A to 30P to absorb light transmitted to the gap G or light reflected from the gap G, thereby minimizing the perception of the seam.

[0108] Reference Figure 5 The front cover 100 can be provided to extend beyond the substrate 40 in the second direction Y.

[0109] The substrate 40 may include a mounting surface 41, a rear surface 48 formed parallel to the mounting surface 41, and a side surface 45 disposed between the mounting surface 41 and the rear surface 48.

[0110] The substrate 40 may include a chamfered portion 49 formed between the mounting surface 41 and the side surface 45 and between the rear surface 48 and the side surface 45.

[0111] When multiple display modules 30A to 30P are arranged, the chamfered portion 49 can prevent each substrate 40 from being bumped and damaged.

[0112] The front cover 100 may be provided to extend beyond the side surface 45 and the chamfered portion 49 in a second direction Y perpendicular to the first direction X.

[0113] One or more embodiments of this disclosure may be described with respect to one edge of the substrate 40 corresponding to the right edge 31 of the first display module 30A, but the chamfered portion 49 and the side surface 45 may be formed on other edges of the substrate 40 corresponding to the other edges 32, 33 and 34.

[0114] On the four edges 31, 32, 33, 34 of the first display module 30A or the four edges of the substrate 40, the opposite chamfered portions 49 can be configured symmetrically and the opposite side surfaces 45 can be configured symmetrically (see...). Figure 5 ).

[0115] Therefore, the front cover 100 can be provided to extend beyond the four edges of the substrate 40 in the second direction Y or in a third direction Z perpendicular to the first direction X and the second direction Y.

[0116] The front cover 100 includes an anti-glare layer 110 disposed on the outermost side of the display module 30 in the first direction X, and a light transmittance control layer 120 disposed behind the anti-glare layer 110.

[0117] Alternatively, as configuration names, the anti-glare layer 110 and the light transmittance control layer 120 can be referred to as the first layer 110 and the second layer 120 when viewed sequentially from the front.

[0118] Furthermore, the layer disposed on the foremost surface of the front cover 100 (such as the anti-reflective layer 150 or front layer 160 disclosed in other embodiments of this disclosure as described below) can be collectively referred to as the first layer together with the anti-glare layer 110, while the layer disposed behind the first layer (such as the circular polarization layer 140) can be collectively referred to as the second layer together with the light transmittance control layer 120.

[0119] The front cover 100 may include an adhesive layer 130 provided such that the front cover 100, including the anti-glare layer 110 and the light transmittance control layer 120, is directly bonded to the mounting surface 41. The adhesive layer 130 may be disposed on the rearmost side of the front cover 100 in a first direction X.

[0120] However, this disclosure is not limited thereto. The adhesive layer 130 may not be provided as a component of the front cover 100, but may be provided as a component of the substrate 40, which is arranged on the upper surface of the mounting surface 41 in the first direction X such that the front cover 100 is engaged with the mounting surface 41.

[0121] The adhesive layer 130 can be formed of a transparent material through which light can easily pass. In one implementation, the adhesive layer 130 can be in a highly transparent state with a transmittance of 90% or higher, such as an optically clear or transparent resin (OCR).

[0122] OCR can improve visibility and image quality by increasing transmittance through low reflectivity. In structures with air gaps, light loss occurs due to the refractive index difference between the film and the air layer. However, in structures using OCR, the refractive index difference is reduced, thereby reducing light loss and thus improving visibility and image quality.

[0123] OCR can improve image quality and protect the substrate 40.

[0124] The adhesive layer 130 may be provided to have a predetermined height or a greater height in the first direction X facing the mounting surface 41.

[0125] This is to fully fill the gaps that may form between the adhesive layer 130 and the plurality of inorganic light-emitting diodes 50 when the adhesive layer 130 is bonded to the substrate 40.

[0126] Specifically, a plurality of inorganic light-emitting diodes 50 mounted on the mounting surface 41 are configured to protrude from the mounting surface 41 in the first direction X, so that the uneven portion can be arranged on the mounting surface 41 in the second direction Y perpendicular to the first direction X.

[0127] When the adhesive layer 130 is bonded to the substrate 40, gaps may form between the mounting surface 41 and the adhesive layer 130 due to uneven portions. In order to fill the uneven portions on the mounting surface 41 formed by the plurality of inorganic light-emitting diodes 50, the adhesive layer 130 needs to have a predetermined height or a greater height.

[0128] The adhesive layer 130 is bonded to the mounting surface 41 by being compressed and hardened on the mounting surface 41. During the curing process of the adhesive layer 130, void areas may form between the mounting surface 41 and the adhesive layer 130 due to uneven portions, which may lead to the formation of bubbles.

[0129] However, when the adhesive layer 130 is formed at a certain height, the adhesive layer 130 can be formed even inside the uneven portion formed on the mounting surface 41 during compression hardening, so that the adhesive layer 130 can be completely formed on the mounting surface 41 without leaving a void between the mounting surface 41 and the adhesive layer 130.

[0130] As described above, the adhesive layer 130 tightly bonds to the mounting surface 41 while protecting the components on the mounting surface 41, so that the display module 30 can have a front cover 100 that is directly bonded to the substrate 40 without using additional molding structures formed between the front cover 100 and the substrate 40.

[0131] External light incident on the display module 30 can pass through the anti-glare layer 110, the light transmittance control layer 120 and the adhesive layer 130 in sequence to reach the substrate 40 and the gap G.

[0132] Conversely, light reflected from the substrate 40 and the gap G can pass sequentially through the adhesive layer 130, the light transmittance control layer 120, and the anti-glare layer 110 to exit the display panel 20.

[0133] The anti-glare layer 110 can be provided to diffuse externally incident light to prevent externally incident light from being regularly reflected and causing glare to the user.

[0134] Because light incident from the outside is diffused, glare can be reduced and the contrast of the image displayed on the display panel 20 can be improved.

[0135] A light transmittance control layer 120 can be provided to reduce the transmittance of light incident from the outside or the transmittance of external light reflected from the substrate 40 and the gap G.

[0136] According to one or more embodiments of the present disclosure, the light transmittance control layer 220 includes a material that reduces the light transmittance to allow at least a portion of the light to be transmitted to the substrate 40 or to absorb at least a portion of the light reflected from the substrate 40 and traveling in a first direction X.

[0137] The light transmittance control layer 220 can be provided to have a lower transparency than the adhesive layer 130 in order to reduce light transmittance. When multiple substrates are manufactured, some substrates may have different colors due to process errors during manufacturing. Therefore, substrates with different unique colors may be spliced ​​together to form a single display panel.

[0138] As described above, the light transmittance control layer 120 according to one or more embodiments of the present disclosure absorbs at least a portion of the light reflected from the substrate 40 and transmitted to the outside, thereby improving the overall image quality of the display panel 20.

[0139] The anti-glare layer 110 and the light transmittance control layer 120 can prevent external light incident on the display panel 20 from being transmitted to the substrate 40, or prevent external light reflected from the substrate 40 from being transmitted to the outside of the display panel 20, thereby improving the contrast of the image displayed on the display panel 20.

[0140] The front cover 100 can be disposed in front of the substrate 40 in the first direction X to improve the contrast that may be deteriorated due to external light on the image displayed on the display panel 20.

[0141] As described above, in the case of the display module 30 according to one or more embodiments of the present disclosure, the front cover 100 may be provided to extend beyond the substrate 40 in the second direction Y.

[0142] Therefore, a portion of the light introduced into the gap G formed between the multiple display modules 30A to 30P can be blocked by at least a portion of the anti-glare layer 110 disposed in the gap G, and external light introduced into the gap G and then reflected in the gap G can be absorbed by at least a portion of the light transmittance control layer 120 disposed in the gap G and not transmitted to the outside, thereby improving the overall quality of the image displayed on the display panel 20.

[0143] Specifically, the front cover 100 includes a first region 101 disposed on the outside of the mounting surface 41 or disposed in the gap G in the second direction Y, and a second region 102 disposed on the mounting surface 41.

[0144] The first region 101 and the second region 102 of the front cover 100 can be divided by the gap G.

[0145] Since the first region 101 of the front cover 100 is located in the gap G, external light directed to the gap G can be blocked by the first region 101 of the front cover 100, or light reflected from the gap G and then directed to the outside can be blocked by the first region 101 of the front cover 100, thereby reducing the exposure of the seam that may be formed by the gap G, which serves as the boundary between the multiple display modules 30A to 30P, and improving the overall look of the image displayed on the display panel 20.

[0146] As described above, the front cover 100 can be provided to extend beyond the mounting surface 41 not only in the second direction Y but also in the direction opposite to the second direction Y.

[0147] The front cover 100 can be provided to extend beyond the four edges of the mounting surface 41.

[0148] Taking the first display module 30A and the second display module 30E as examples, the first region 101A of the first front cover 100A extending from the first display module 30A can be disposed in the gap G formed between the first display module 30A and the second display module 30E.

[0149] The gap G can be defined as the distance between the mounting surface 41 of the first display module 30A and the mounting surface 41 of the second display module 30E in the second direction Y.

[0150] Therefore, the side surfaces 45 and chamfered portions 49 of the first display module 30A and the second display module 30E can be disposed in the gap G.

[0151] The second area 102A of the first front cover 100A can be disposed on the mounting surface 41 of the first display module 30A.

[0152] The first region 101E of the second front cover 100E extending from the second display module 30E can be disposed in the gap G formed between the first display module 30A and the second display module 30E, and the second region 102E of the second front cover 100E can be disposed on the mounting surface 41 of the second display module 30E.

[0153] In the gap G formed between the first display module 30A and the second display module 30E, the first regions 101A and 101E of the first front cover 100A and the second front cover 100E can be arranged parallel to each other in the second direction Y.

[0154] The first regions 101A and 101E of the first front cover 100A and the second front cover 100E may each extend less than half the length of the gap G in the second direction Y or in the direction opposite to the second direction Y.

[0155] Therefore, when the first regions 101A and 101E of the first front cover 100A and the second front cover 100E are arranged parallel to each other in the second direction Y, the sum of the lengths of the first regions 101A and 101E of the first front cover 100A and the second front cover 100E can be provided to be equal to or less than the length of the gap G in the second direction Y.

[0156] According to one or more embodiments of the present disclosure, when the first regions 101A and 101E of the first front cover 100A and the second front cover 100E are arranged parallel to each other in the second direction Y, a predetermined interval d may exist between the first region 101A of the first front cover 100A and the first region 101E of the second front cover 100E.

[0157] However, this disclosure is not limited thereto, and the first display module 30A and the second display module 30E can be spliced ​​together without any gap between the first region 101A of the first front cover 100A and the first region 101E of the second front cover 100E.

[0158] However, in one implementation, a predetermined interval d may exist between the first region 101A of the first front cover 100A and the first region 101E of the second front cover 100E.

[0159] As described above, the first regions 101A and 101E of the first front cover 100A and the second front cover 100E can be arranged in the gap G between the first display module 30A and the second display module 30E.

[0160] External light incident on the display panel passes through the first regions 101A and 101E of the first front cover 100A and the second front cover 100E. The external light is diffusely reflected to the outside or partially absorbed by the first regions 101A and 101E, thereby reducing the amount of external light reaching the gap G and reducing the exposure of the boundary between the first display module 30A and the second display module 30E caused by the gap G.

[0161] Furthermore, when light reflected from the gap G and directed to the outside of the display panel 20 passes through the first regions 101A and 101E of the first front cover 100A and the second front cover 100E, the light is diffusely reflected outside the display panel 20 or partially absorbed by the first regions 101A and 101E, thus reducing the amount of light transmitted to the outside of the display panel 20 and reducing the exposure of the boundary between the first display module 30A and the second display module 30E due to the gap G.

[0162] This configuration can reduce the amount of external light introduced into the gap G formed between the multiple display modules 30A to 30P, while absorbing at least a portion of the external light reflected from the gap G, thereby improving the overall image quality of the display panel 20.

[0163] Furthermore, even when the substrate 40A of the first display module 30A and the substrate 40E of the second display module 30E are provided with different colors and each of the substrates 40A and 40E is displayed to the outside through the reflection of external light, at least a portion of the reflected light is absorbed by a corresponding one of the first front cover 100A and the second front cover 100E, so that the unique color of each of the substrates 40A and 40E is not perceived by the outside, and the overall sense of the picture can be improved.

[0164] In the following text, we will combine Figures 1 to 5 A method for manufacturing a display device according to an embodiment of the present disclosure is briefly described.

[0165] Figure 6 This is a flowchart illustrating a method for manufacturing a display device according to an embodiment of the present disclosure.

[0166] First, a display module 30 (501) is fabricated. A plurality of inorganic light-emitting diodes 50 are mounted on the mounting surface 41 of the substrate 40 of the display module 30. To improve contrast, the substrate 40 may include a light-absorbing layer 60. The substrate 40 may include an anisotropic conductive layer 70 to facilitate the connection of the plurality of inorganic light-emitting diodes 50 to the substrate 40.

[0167] Furthermore, the black matrix 80 can be formed on the anisotropic conductive layer 70 of multiple display modules 30A to 30P.

[0168] Next, the front cover 100 is attached to the mounting surface 41 (502) of the display module 30. The front cover 100 can be provided to cover the entire area of ​​the mounting surface 41. The front cover 100 can be formed by a compression hardening process on the mounting surface 41.

[0169] Next, the front cover 100 is cut such that at least a portion of the front cover 100 extends beyond the substrate 40 in a second direction Y perpendicular to the first direction X facing the mounting surface 41 (503).

[0170] Specifically, the front cover 100 can be cut to form a first region 101 of the front cover 100 outside the mounting surface 41 in the second direction Y.

[0171] Cutting processes can be performed using methods such as laser cutting.

[0172] The cutting process can also be performed such that, in addition to the second direction Y, the front cover 100 also includes a first region 101 outside the mounting surface 41 in a third direction Z perpendicular to the first direction X and the second direction Y.

[0173] The front cover 100 can be cut to have a first region 101 extending beyond the four sides of the mounting surface 41.

[0174] In the cutting process, the first region 101 extending beyond the mounting surface 41 can be processed to have a length less than or equal to about half the length of the gap formed between the display modules 30, which can be provided as a plurality of display modules 30A to 30P.

[0175] Next, the display module 30 processed as described above can be fabricated into multiple display modules 30A to 30P, and the multiple display modules 30A to 30P can be arranged adjacent to each other (504). In this case, the multiple display modules 30A to 30P can be fixed by a fixture. The multiple display modules 30A to 30P can be arranged in an M×N matrix form.

[0176] Therefore, when multiple display modules 30A to 30P are arranged adjacent to each other, the first region 101 of the front cover 100 extending from each of the display modules 30A to 30P can be provided in the gap G formed between the multiple display modules 30A to 30P.

[0177] Below, another embodiment of the display device according to this disclosure will be described. The components, except for the front cover 100 which will be described below, are the same as, substantially the same as, or similar to those components of the display device 1 according to the above embodiment.

[0178] Figure 7This is an enlarged cross-sectional view showing one or more components of a display device according to another embodiment of the present disclosure.

[0179] Reference Figure 7 The front cover 100 may include a circular polarization layer 140.

[0180] The circular polarization layer 140 is provided to allow only light with a specific phase in the transmitted light to pass through, and to absorb light with other phases, thereby reducing the transmittance of light passing through the circular polarization layer 140.

[0181] The circular polarization layer 140 may include a linear polarization layer and a circular polarization layer. The linear polarization layer and the circular polarization layer may be arranged sequentially in the first direction X.

[0182] Specifically, the linear polarization layer and circular polarization layer included in the circular polarization layer 140 can change the phase of external light incident from outside the display panel 20. External light reflected from the substrate 40 or the gap G and then redirected to the circular polarization layer 140 has a changed phase as it passes through the circular polarization layer 140. Due to this changed phase, the circular polarization layer 140 prevents the external light from passing through the circular polarization layer 140.

[0183] Therefore, at least a portion of the external light incident on the display panel 20 can be absorbed by the circular polarization layer 140 without being reflected to the outside. The circular polarization layer 140 can be provided to allow only light with a specific phase in the transmitted light to pass through, and absorb light with a phase other than that specific phase.

[0184] Therefore, the circular polarization layer 140 absorbs a portion of the light that passes through the circular polarization layer 140 and is then reflected from the substrate 40 or the gap G (especially the light reflected from the gap G), thereby reducing the visibility of the seam that is perceived in the gap G.

[0185] In the above embodiments, the degree to which light passes through the light transmittance control layer 120 can be adjusted by regulating the transparency of the material of the light transmittance control layer 120. In contrast, according to one or more embodiments, the degree to which light reflected from the substrate 40 or the gap G is retransmitted back to the outside can be adjusted by the phase difference of the light.

[0186] As described above, the front cover 100 can be arranged in the first direction X on the gap G.

[0187] Therefore, external light incident on the display panel 20 can pass through the anti-glare layer 110, the circular polarization layer 140, and the adhesive layer 130 to enter the gap G. In this case, the anti-glare layer 110 can prevent incident light from entering the gap G.

[0188] Furthermore, light reflected from gap G can be directed to the outside by passing through adhesive layer 130, circular polarization layer 140 and anti-glare layer 110 in sequence. In this case, light with a phase other than a specific phase that passes through circular polarization layer 140 can be absorbed by circular polarization layer 140 and not transmitted to the outside.

[0189] Below, another embodiment of the display device according to this disclosure will be described. The components, except for the front cover 100 which will be described below, are the same as, substantially the same as, or similar to those components of the display device 1 according to the above embodiment.

[0190] Figure 8 This is an enlarged cross-sectional view showing one or more components of a display device according to another embodiment of the present disclosure.

[0191] Reference Figure 8 The front cover 100 may include an anti-reflective layer 150.

[0192] The anti-reflective layer 150 can reflect external light incident on the display panel 20 to the outside of the display panel 20, rather than towards the substrate 40 or the gap G. Therefore, the amount of light incident on the gap G and passing through the anti-reflective layer 150 can be reduced.

[0193] Therefore, the reflectivity of external light incident on the display panel 20 and guided to the gap G is reduced, thereby improving the overall image quality of the display panel 20.

[0194] The anti-reflective layer 150 may include multiple layers with different refractive indices. When external light is incident on the anti-reflective layer 150, the external light may be internally reflected due to the differences in the refractive indices of the multiple layers, and thus travel to the outside of the display panel 20 instead of traveling to the substrate 40 or the gap G.

[0195] Therefore, the anti-reflective layer 150 only allows a portion of the transmitted light to be directed to the substrate 40 or the gap G and absorbs the rest of the light (especially a portion of the light directed to the gap G), thereby reducing the exposure of the seam perceived in the gap G and reducing the exposure of the boundary between the multiple display modules 30A to 30P.

[0196] Conversely, the anti-reflective layer 150 can be provided such that light reflected from the gap G or the substrate 40 and incident on the anti-reflective layer 150 is internally reflected to prevent transmission in the first direction X. For example, through the anti-reflective layer 150, light directed from the gap G in the first direction X is allowed to be transmitted in a direction corresponding to the second direction Y or the third direction Z, thereby reducing the reflectivity of external light on the display panel 20 and reducing the exposure of the boundaries between the plurality of display modules 30A to 30P.

[0197] Therefore, only a portion of the light reflected from the substrate 40 or the gap G and transmitted to the anti-reflective layer 150 passes through the anti-reflective layer 150, thereby reducing the visibility of the seam in the gap G and improving the overall look of the display panel 20.

[0198] In the above embodiments, the reflectivity of external light can be adjusted by allowing external light to be diffusely reflected on the surface of the anti-glare layer 110 of the front cover 100, while in one or more embodiments, the degree of light transmission can be adjusted by adjusting the direction of light reflection via the anti-reflection layer 150.

[0199] As described above, the front cover 100 can be disposed in the gap G in the first direction X.

[0200] Therefore, external light incident on the display panel 20 can pass through the anti-reflective layer 150, the light transmittance control layer 120 for adjusting light transmittance, and the adhesive layer 130 to enter the gap G. In this case, due to the anti-reflective layer 150 and the light transmittance control layer 120, at least a portion of the incident light can be prevented from entering the gap G.

[0201] Furthermore, light reflected from gap G can be transmitted to the outside by passing through adhesive layer 130, light transmittance control layer 120 and anti-reflection layer 150 in sequence. In this case, a portion of the light is prevented from being directed to the front of display panel 20 due to passing through light transmittance control layer 120 and anti-reflection layer 150.

[0202] Below, a display device according to another embodiment of the present disclosure will be described. It will be understood that the components other than the front cover 100 described below are the same as, substantially the same as, or similar to those components of the display device 1 according to the above embodiment.

[0203] Figure 9 This is an enlarged cross-sectional view showing one or more components of a display device according to another embodiment of the present disclosure.

[0204] Reference Figure 9 The front cover 100 may include an anti-reflective layer 150 and a circular polarizing layer 140.

[0205] The anti-reflective layer 150 reflects external light incident on the display panel 20 to the outside of the display panel 20 rather than towards the substrate 40 or the gap G, thereby reducing the amount of external light passing through the anti-reflective layer 150. Therefore, the reflectivity of external light introduced into the display panel 20 and directed to the gap G can be reduced, thereby improving the overall image quality of the display panel 20.

[0206] The circular polarizing layer 140 can be provided to allow only light with a specific phase in the transmitted light to pass through, and to absorb light with a phase other than that specific phase.

[0207] Therefore, only a portion of the light passing through the anti-reflective layer 150 is transmitted to the substrate 40 or the gap G, and the amount of light (especially the amount of light directed to the gap G) is reduced by the internal reflection of the anti-reflective layer 150, thereby reducing the visibility of the seam in the gap G.

[0208] Conversely, light reflected from gap G or substrate 40 and transmitted to circular polarization layer 140 and antireflection layer 150 is absorbed by circular polarization layer 140 or internally reflected by antireflection layer 150 and is not transmitted in the first direction X, thereby reducing the reflectivity of light reflected from gap G in display panel 20 and improving the overall image quality of display panel 20.

[0209] As described above, the front cover 100 can be disposed in the gap G in the first direction X.

[0210] Therefore, external light incident on the display panel 20 can pass through the anti-reflective layer 150, the circular polarizing layer 140, and the adhesive layer 130 to enter the gap G. A front cover 100 can be provided so that the anti-reflective layer 150 prevents at least a portion of the incident light from entering the gap G.

[0211] Furthermore, light reflected from gap G can be directed to the outside by passing sequentially through adhesive layer 130, circular polarization layer 140 and anti-reflection layer 150. In this case, front cover 100 can be provided to prevent a portion of the light from being directed to the front of display panel 20 due to passing through circular polarization layer 140 and anti-reflection layer 150.

[0212] Below, another embodiment of the display device according to this disclosure will be described. The components, except for the front cover 100 which will be described below, are the same as, substantially the same as, or similar to those components of the display device 1 according to the above embodiment.

[0213] Figure 10 This is an enlarged cross-sectional view showing one or more components of a display device according to another embodiment of the present disclosure.

[0214] Reference Figure 10 The front cover 100 may include a front layer 160 disposed on the foremost side of the front cover 100.

[0215] The front layer 160 may include both the anti-reflective layer and the anti-glare layer described above. The front layer 160 may be configured in a stacked manner, such that the anti-reflective layer and the anti-glare layer are layered.

[0216] An anti-glare layer is provided to diffusely reflect light incident on the front layer 160 from the outside, and an anti-reflection layer is provided to induce the reflection direction of light so that light incident on the front layer 160 is not reflected to the outside in the first direction X of the display panel 20.

[0217] In this way, the front layer 160 can reduce the reflectivity of external light incident on the display panel 20 through the anti-glare layer and the anti-reflection layer.

[0218] In one implementation, the anti-glare layer and the anti-reflective layer can be arranged sequentially in the first direction X.

[0219] The front cover 100 may include a light transmittance control layer 120 disposed behind the front layer 160.

[0220] Similar to the light transmittance control layer 120 according to the above embodiments, the light transmittance control layer 120 of the front cover 100 can be provided as a light transmittance control layer configured to reduce the transmittance of light incident from the outside or the transmittance of external light reflected from the substrate 40 and the gap G.

[0221] The front cover 100 is provided such that only a portion of the light passing through the front layer 160 and the light transmittance control layer 120 is transmitted to the substrate 40 or the gap G.

[0222] The front cover 100 is provided such that incident light passing through the front layer 160 is diffusely reflected or undergoes internal reflection to change the direction of reflection and is absorbed by the light transmittance control layer 120, thereby reducing the amount of light (especially the amount of light directed to the gap G) to reduce the visibility of the seam perceived in the gap G.

[0223] Conversely, the front cover 100 is provided such that at least a portion of the light reflected from the substrate G and the gap G is prevented from leaving the display panel 20 in the first direction X by passing through the light transmittance control layer 120 and the front layer 160, thereby reducing the reflectivity of external light (especially the reflectivity of external light reflected from the gap G) and improving the overall image quality of the display panel 20.

[0224] As described above, the front cover 100 can be disposed in the gap G in the first direction X.

[0225] Therefore, external light incident on the display panel 20 can pass through the front layer 160, which includes an anti-glare layer and an anti-reflection layer, the light transmittance control layer 120 for adjusting light transmittance, and the adhesive layer 130, to enter the gap G. In this case, due to the front layer 160 and the light transmittance control layer 120, at least a portion of the incident light can be prevented from entering the gap G.

[0226] Furthermore, light reflected from gap G can be transmitted to the outside by passing through adhesive layer 130, light transmittance control layer 120 and front layer 160 in sequence. In this case, a portion of the light reflected from gap G is prevented from being directed to the front of display panel 20 because it passes through light transmittance control layer 120 and front layer 160.

[0227] Below, another embodiment of the display device according to this disclosure will be described. The components, except for the front cover 100 which will be described below, are the same as, substantially the same as, or similar to those components of the display device 1 according to the above embodiment.

[0228] Figure 11 This is an enlarged cross-sectional view showing one or more components of a display device according to another embodiment of the present disclosure.

[0229] The front cover 100 may include a front layer 160 and a circularly polarized layer 140 disposed behind the front layer 160.

[0230] Reference Figure 11 Similar to the above embodiments, the front layer 160 may include both the anti-reflective layer and the anti-glare layer.

[0231] The front layer 160 can reduce the reflectivity of external light incident on the display panel 20 through the anti-glare layer and the anti-reflection layer.

[0232] For light incident on the circular polarization layer 140 and reflected from the substrate 40 and the gap G, light with a phase other than a specific phase is prevented from passing through the circular polarization layer 140.

[0233] The front cover 100 is provided such that only a portion of the light passing through the front layer 160 is transmitted to the substrate 40 or the gap G.

[0234] The front cover 100 is provided such that incident light passing through the front layer 160 is diffusely reflected or undergoes internal reflection to change the direction of reflection, and the amount of light (in particular the amount of light directed to the gap G) is reduced to decrease the visibility of the seam in the gap G.

[0235] Conversely, the front cover 100 is provided such that at least a portion of the light reflected from the substrate 40 and the gap G is prevented from passing through the display panel 20 in the first direction X by passing through the circular polarization layer 140 and the front layer 160, thereby reducing the reflectivity of external light (especially the reflectivity of external light reflected from the gap G) and improving the overall image quality of the display panel 20.

[0236] As described above, the front cover 100 can be disposed on the gap G in the first direction X.

[0237] Therefore, external light incident on the display panel 20 can pass through the front layer 160, which includes an anti-glare layer and an anti-reflection layer, the circular polarization layer 140, and the adhesive layer 130, to enter the gap G. In this case, due to the front layer 160, at least a portion of the incident light can be prevented from entering the gap G.

[0238] Furthermore, light reflected from gap G can be transmitted to the outside of display device 1 by passing through adhesive layer 130, circular polarization layer 140 and front layer 160 in sequence. In this case, a portion of the light is prevented from being directed to the front of display panel 20 due to passing through circular polarization layer 140 and front layer 160.

[0239] Below, another embodiment of the display device according to this disclosure will be described. The components, except for the front cover 100 which will be described below, are the same as, substantially the same as, or similar to those components of the display device 1.

[0240] Figure 12 This is an enlarged cross-sectional view showing one or more components of a display device according to another embodiment of the present disclosure.

[0241] Reference Figure 12 The adhesive layer 180 may be formed of a different composition than that of the adhesive layer 130 according to the above embodiments of the present disclosure.

[0242] Specifically, the adhesive layer 180 may be formed of a material capable of absorbing at least a portion of the light transmitted through the adhesive layer 180.

[0243] The adhesive layer 130 according to the above embodiments of the present disclosure is formed of a substantially transparent material through which incident light can easily pass, while the adhesive layer 180 according to one or more embodiments of the present disclosure may be partially opaque, such that at least a portion of the light transmitted to the adhesive layer 180 does not pass through the adhesive layer 180.

[0244] Similar to the light transmittance control layer 120 described above, the adhesive layer 180 is provided to reduce the transmittance of light incident on the adhesive layer 180, and the adhesive layer 180 serves as a light transmittance control layer.

[0245] The front cover 100 may include a transparent layer 170 formed of a transparent material. The transparent layer 170 may be disposed between the anti-glare layer 110 and the adhesive layer 180.

[0246] The transparent layer 170 can be in a highly transparent state with a transmittance of 90% or higher, such as optically transparent resin (OCR).

[0247] This is because the adhesive layer 180 reduces the transmittance of light passing through the display panel 20, and the further reduction in light transmittance may reduce the brightness of the display panel 20 itself.

[0248] Therefore, the transparent layer 170 can be formed of a transparent material, and light incident on the transparent layer 170 can easily pass through the transparent material.

[0249] This disclosure is not limited thereto; the transparent layer 170 can be omitted from the front cover 100.

[0250] The front cover 100 is provided such that only a portion of the light passing through the anti-glare layer 110, the transparent layer 170 and the adhesive layer 180 is transmitted to the substrate 40 or the gap G.

[0251] Through the front cover 100, incident light is diffusely reflected by the anti-glare layer 110 or absorbed by the adhesive layer 180, thereby reducing the amount of light directed to the gap G and thus reducing the exposure of the seam formed in the gap G.

[0252] Conversely, through the front cover 100, at least a portion of the light reflected from the gap G or the substrate 40 is prevented from passing through the display panel 20 in the first direction X by passing through the adhesive layer 180 and the anti-glare layer 120, thereby reducing the reflectivity of external light (especially the reflectivity of external light reflected from the gap G in the display panel 20) and improving the overall image quality of the display panel 20.

[0253] As described above, the front cover 100 can be disposed on the gap G in the first direction X.

[0254] Therefore, external light incident on the display panel 20 can pass through the anti-glare layer 110, the transparent layer 170, and the adhesive layer 180 for adjusting light transmittance to enter the gap G. In this case, the anti-glare layer 110 and the adhesive layer 180 prevent at least a portion of the incident light from entering the gap G.

[0255] Furthermore, light reflected from the gap G can be transmitted to the outside by passing through the adhesive layer 180, the transparent layer 170 and the anti-glare layer 110 in sequence. In this case, the light is prevented from being directed to the front of the display panel 20 by passing through the adhesive layer 180 and the anti-glare layer 110.

[0256] Below, another embodiment of the display device according to this disclosure will be described. The components, except for the front cover 100 which will be described below, are the same as, substantially the same as, or similar to those components of the display device 1 according to the above embodiment.

[0257] Figure 13 This is an enlarged cross-sectional view showing one or more components of a display device according to another embodiment of the present disclosure.

[0258] Reference Figure 13 The front cover 100 includes an upper surface 103 disposed on the upper side in a first direction X, a lower surface 104 disposed on the opposite side of the upper surface 103, and a side surface 105 connecting the upper surface 103 to the lower surface 104.

[0259] The side surface 105 of the front cover 100 can be formed as an inclined surface that is inclined relative to the first direction X.

[0260] The side surface 105 can be provided as inclined such that the upper surface 103 is formed longer than the lower surface 104 in the second direction Y. The side surface 105 of the front cover 100 can be provided such that the length of the cross section of the front cover 100 increases with respect to the first direction X.

[0261] In the front cover 100, light reflected inside the front cover 100 along the extension direction of the front cover 100 can be guided from the side surface 105 of the front cover 100, and the light guided from the side surface 105 can be guided in a first direction X by reflection via the inclined surface of the side surface 105, but not in a second direction Y or a third direction Z, the second direction Y or the third direction Z being the direction in which the light is guided.

[0262] Of the light passing through the interior of the front cover 100, light moving along the extension direction of the front cover 100 can be allowed to be reflected in the first direction X by the inclined surface of the side surface 105.

[0263] The side surface 105 of the front cover 100 is disposed in the gap G and configured to reflect light within the front cover 100, such that light that may leak in the gap G in the second direction Y or the third direction Z is transmitted in the first direction X.

[0264] Therefore, light leakage that may occur in the lateral direction of the display module 30 is reduced, and the exposure of seams that may be caused by light leakage at the boundaries of multiple display modules 30A-30P is reduced, thereby improving the overall picture quality of the display panel 20.

[0265] Relative to the second direction Y, one end of the upper surface 103 and one end of the lower surface 104 can be disposed in the gap G. Specifically, said one end of the upper surface 103 and said one end of the lower surface 104 can be provided to be disposed outside the mounting surface 41 in the second direction Y.

[0266] Furthermore, one end of the upper surface 103 and one end of the lower surface 104 may be provided to be disposed outside the side surface 45 of the substrate 40 in the second direction Y.

[0267] Therefore, even when the side surface 105 of the front cover 100 is formed to be inclined, the anti-glare layer 110 and the light transmittance control layer 120 can be provided in the first region 101 of the front cover 100.

[0268] Therefore, the anti-glare layer 110 and the light transmittance control layer 120 are disposed in the gap G between the multiple display modules 30A-30P, and reduce the exposure of the seams that may be formed by the gap G between the boundaries of the multiple display modules 30A to 30P, and improve the overall look of the display panel 20.

[0269] Specifically, the distance L2 in the second direction Y between one end 104bA of the lower surface 104A of the first front cover 100A of the first display module 30A and one end 104bE of the lower surface 104E of the second front cover 100E of the second display module 30E is shorter than the distance L1 between the side surface 45A of the substrate 40A of the first display module 30A and the side surface 45E of the substrate 40E of the second display module 30E. There is a distance d1 in the second direction Y between one end 104bA of the lower surface 104A of the first front cover 100A of the first display module 30A and the side surface 45A of the substrate 40A of the first display module 30A.

[0270] Furthermore, the distance L2 between one end 104bA of the lower surface 104A of the first front cover 100A of the first display module 30A and one end 104bE of the lower surface 104E of the second front cover 100E of the second display module 30E in the second direction Y is shorter than the length of the gap G formed between the first display module 30A and the second display module 30E in the second direction Y.

[0271] Furthermore, the distance d between one end 103tA of the upper surface 103A of the first front cover 100A of the first display module 30A and one end 103tE of the upper surface 103E of the second front cover 100E of the second display module 30E in the second direction Y is shorter than the distance L2 between one end 104bA of the lower surface 104A of the first front cover 100A of the first display module 30A and one end 104bE of the lower surface 104E of the second front cover 100E of the second display module 30E in the second direction Y.

[0272] The distance between the side surface 105A of the first front cover 100A of the first display module 30A and the side surface 105E of the second front cover 100E of the second display module 30E is provided to decrease in the first direction X.

[0273] With this configuration, the side surface 105A of the first front cover 100A and the side surface 105E of the second front cover 100E are disposed in the gap G between the first display module 30A and the second display module 30E, so that the first area 101 of the front cover 100 capable of absorbing external light can be fully disposed in the gap G.

[0274] When one end of the upper surface 103 and one end of the lower surface 104 of the front cover 100 are provided to be disposed outside the mounting surface 41 in the second direction Y, one end of the upper surface 103 and one end of the lower surface 104 of the front cover 100 are disposed outside the side surface 45 of the substrate 40 in the second direction Y, such that the side surface 105 of the front cover 100 can be provided to be inclined at a predetermined angle θ1.

[0275] When one end of the lower surface 104 of the front cover 100 is disposed on the mounting surface 41 instead of in the gap G in the second direction Y, the tilt angle θ1 of the side surface 105 can be large. In this case, the first region 101 of the front cover 100 may not be adequately disposed in the gap G, and the rigidity of the side surface 105 of the front cover 100 may be reduced.

[0276] Therefore, the tilt angle θ1 of the side surface 105 can be set to an angle at which one end of the lower surface 104 of the front cover 100 is positioned outside the mounting surface 41 in the second direction Y.

[0277] The tilt angle θ1 of the side surface 105 can be formed to be smaller than the tilt angle θ2 of the chamfered portion 49. The tilt angle θ2 of the chamfered portion 49 can preferably be set to about 45°, and the tilt angle θ1 of the side surface 105 can be formed to be smaller than about 45°.

[0278] Below, another embodiment of the display device according to this disclosure will be described. The components, except for the front cover 100 which will be described below, are the same as, substantially the same as, or similar to those components of the display device 1 according to the above embodiment.

[0279] Figure 14 This is an enlarged cross-sectional view showing one or more components of a display device according to another embodiment of the present disclosure.

[0280] The front cover 100 may include a light-absorbing portion 106 disposed on a side surface 105 formed as an inclination. Specifically, the light-absorbing portion 106 may engage the side surface 105 from the outside in a second direction Y.

[0281] The light-absorbing portion 106 may be disposed on the gap G in the second direction Y, and may be provided to absorb at least a portion of the light transmitted to the outside through the side surface 105 of the front cover 100. The light-absorbing portion 106 may reduce light leakage that may occur from the side surface 105 of the front cover 100.

[0282] As described above, the side surface 105 is arranged at an angle to allow at least a portion of the light guided from the side surface 105 to be reflected in the first direction X. Light not reflected by the angled surface of the side surface 105 can pass through the side surface 105 and exit to the outside.

[0283] The light-absorbing portion 106 absorbs a portion of the light passing through the side surface 105 in this way, thereby reducing light leakage generated in the gap G, reducing the exposure of seams that may be formed by the gap G between the boundaries of the multiple display modules 30A to 30P, and improving the overall picture quality of the display panel 20.

[0284] As is evident from the above, the display device according to one or more embodiments absorbs light incident on or reflected from the gap between adjacent display modules, thereby providing a seamless effect that prevents the seam from being visually perceived.

[0285] A display device according to one or more embodiments of the present disclosure includes a plurality of display modules, each of the plurality of display modules including a component configured to absorb light incident on or reflected from a gap between adjacent display modules, thereby easily and effectively achieving a seamless effect even during assembly.

[0286] A description of various aspects and implementations has been given for illustrative purposes, but this description is not intended to be exhaustive or limited to the disclosed implementations. Although combinations of features are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of possible implementations. In fact, many of these features can be combined in ways not expressly recited in the claims and / or not expressly disclosed in the specification. Although each dependent claim listed below may directly refer to only one claim, the disclosure of possible implementations includes every dependent claim in combination with every other claim in the group of claims. Many modifications and variations will be apparent to those skilled in the art without departing from the scope of the described implementations. The terminology used herein has been chosen to best explain the principles of the implementations, practical applications of technology found in the market, or improvements to the technology, or to enable others skilled in the art to understand the implementations disclosed herein.

[0287] This application claims priority to Korean Patent Application No. 10-2019-0176603, filed with the Korean Intellectual Property Office on December 27, 2019, the disclosure of which is incorporated herein by reference in its entirety.

Claims

1. A display module, comprising: A substrate includes a mounting surface, a side surface, and a chamfered portion formed between the mounting surface and the side surface; Multiple inorganic light-emitting diodes are mounted on the mounting surface, and the multiple inorganic light-emitting diodes include multiple pairs of electrodes electrically connected to the substrate; A black matrix is ​​arranged among the plurality of inorganic light-emitting diodes; as well as The cover is engaged with and configured to cover the mounting surface. The plurality of electrode pairs are arranged in a direction opposite to the direction of light emission from the plurality of inorganic light-emitting diodes. The cover is provided to extend beyond the side surface in the extending direction of the mounting surface, and includes: a first region disposed outside the mounting surface in the extending direction of the mounting surface; and a second region, arranged on the mounting surface, and The gap is formed between the first region and the chamfered portion.

2. The display module according to claim 1, wherein the cover comprises: The first layer is located on the outermost side of the display module in the direction facing the mounting surface. The second layer is located behind the first layer, and An adhesive layer is disposed behind the second layer to bond the cover to the mounting surface.

3. The display module according to claim 2, wherein the first layer comprises at least one of an anti-glare layer and an anti-reflection layer.

4. The display module of claim 2, wherein the second layer includes a light transmittance control layer configured to reduce light transmittance.

5. The display module according to claim 2, wherein the second layer includes a circular polarization layer.

6. The display module of claim 2, wherein the second layer is formed to be transparent, and wherein the adhesive layer comprises an opaque material to reduce light transmittance.

7. The display module of claim 1, wherein the outermost end of the cover in the extending direction of the mounting surface comprises: An inclined surface, inclined relative to the side surface, and The length of the upper section of the cover in the extending direction of the mounting surface is greater than the length of the lower section of the cover in the extending direction of the mounting surface.

8. The display module of claim 7, wherein the cover further comprises a light-absorbing layer configured to cover the inclined surface of the outermost end of the cover in the extending direction of the mounting surface and comprising a light-absorbing material.

9. The display module of claim 1, wherein the substrate has four side surfaces corresponding to the four edges of the mounting surface, and The cover is provided to extend in the extending direction of the mounting surface beyond the four side surfaces corresponding to the four edges of the mounting surface.

10. The display module of claim 1, wherein each of the inorganic light-emitting diodes is provided as a flip-chip light-emitting diode.

11. The display module according to claim 1, wherein each of the inorganic light-emitting diodes comprises: A light-emitting surface formed in the direction facing the mounting surface and a bottom surface formed on the side opposite to the light-emitting surface, and One corresponding pair of electrodes from the plurality of pairs of electrodes is arranged on the bottom surface.

12. A display device comprising a display module array, wherein a plurality of display modules are arranged in an M×N matrix, wherein each of the plurality of display modules comprises: A substrate includes a mounting surface, a side surface, and a chamfered portion formed between the mounting surface and the side surface; Multiple inorganic light-emitting diodes are mounted on the mounting surface, and the multiple inorganic light-emitting diodes include multiple pairs of electrodes electrically connected to the substrate; A black matrix is ​​arranged among the plurality of inorganic light-emitting diodes; as well as The cover is engaged with and configured to cover the mounting surface. The plurality of electrode pairs are arranged in a direction opposite to the direction of light emission from the plurality of inorganic light-emitting diodes. The cover is provided to extend beyond the side surface in the extending direction of the mounting surface, such that at least a portion of the cover is disposed in the gap formed between the mounting surfaces of the plurality of display modules. The cover includes: a first region disposed outside the mounting surface in the extending direction of the mounting surface; and a second region, arranged on the mounting surface, and The gap is formed between the first region and the chamfered portion.

13. The display device according to claim 12, wherein the plurality of display modules includes a first display module and a second display module arranged adjacent to the first display module, and The length of the gap in the extending direction of the mounting surface is provided to be greater than the length of the interval between the cover of the first display module and the cover of the second display module.

14. The display device of claim 13, wherein the outermost ends of the cover of the first display module and the cover of the second display module in the direction in which the first display module and the second display module are adjacent to each other are formed as inclined surfaces relative to the side surfaces of the first display module and the second display module, and The distance between the upper side of the cover of the first display module in the direction facing the mounting surface and the upper side of the cover of the second display module in the direction facing the mounting surface in the extension direction of the mounting surface is shorter than the distance between the lower side of the cover of the first display module in the direction facing the mounting surface and the lower side of the cover of the second display module in the direction facing the mounting surface in the extension direction of the mounting surface.

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