Display device

Abstract

This display device may comprise a display module, a frame for supporting the display module, and an adhesive provided so as to harden between the display module and the frame. The frame comprises a panel disposed on the rear surface of the display module, and a support bar provided on the rear side of the panel, wherein the support bar may be provided to prevent and / or reduce the warping of the display module and / or the panel that occurs due to temperature changes after the adhesive hardens.

Description

Display device

[0001] The present disclosure relates to a display device having an improved structure.

[0002] A display device is a type of output device that visually displays data information, such as characters and shapes, as well as images.

[0003] Generally, liquid crystal panels requiring a backlight or OLED (Organic Light-Emitting Diode) panels, composed of films of organic compounds that emit light in response to an electric current, have been primarily used as display devices. However, liquid crystal panels have issues such as slow response times, high power consumption, and difficulty in miniaturization because they cannot emit light themselves and require a backlight. Additionally, while OLED panels do not require a backlight because they emit light themselves and can be made thin, they are susceptible to burn-in—a phenomenon where specific parts of the previous image remain visible even after a screen change—as the lifespan of subpixels expires when the same image is displayed for a long time.

[0004] Accordingly, micro light-emitting diode (micro LED or μ LED) display panels are being researched as new panels to replace them, in which inorganic light-emitting elements are mounted on a substrate and the inorganic light-emitting elements themselves are used as pixels.

[0005] A micro light-emitting diode display panel (hereinafter referred to as a micro LED panel) is one of flat panel display panels and is composed of a plurality of inorganic light-emitting diodes (inorganic LEDs) each having a size of 100 micrometers or less.

[0006] Although these LED panels are also self-emissive devices, they are inorganic light-emitting devices, so the burn-in phenomenon of OLEDs does not occur, and they offer excellent brightness, resolution, power consumption, and durability.

[0007] Compared to liquid crystal display (LCD) panels that require backlighting, micro LED display panels offer better contrast, response time, and energy efficiency. While both organic light-emitting diodes (OLEDs) and inorganic light-emitting devices like micro LEDs are energy-efficient, micro LEDs offer higher brightness, luminous efficiency, and a longer lifespan than OLEDs.

[0008] In addition, by arranging LEDs on a circuit board in pixel units, it is possible to manufacture display modules at the board level, and it is easy to produce them in various resolutions and screen sizes to meet customer orders.

[0009] At least one embodiment of the present disclosure can provide a display device capable of reducing and / or preventing warping, deformation, etc. caused by temperature changes.

[0010] Embodiments of the present disclosure provide a display device capable of reducing and / or preventing interference between a plurality of display modules.

[0011] Embodiments of the present disclosure provide a display device including a frame having an improved structure.

[0012] The scope of the present disclosure is not limited to the technical problems mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art to which the present invention belongs from the description below.

[0013] A display device according to an exemplary embodiment of the present disclosure may include: a display module comprising a substrate and a plurality of inorganic light-emitting elements on the substrate; a frame configured to support the display module; and an adhesive provided to cure between the display module and the frame. The frame may include: a panel disposed on the rear surface of the display module, having an adhesive interposed between it and the display module, and having a first coefficient of thermal expansion; and a support bar having a second coefficient of thermal expansion lower than the first coefficient of thermal expansion.

[0014] A display device according to an exemplary embodiment of the present disclosure may include: a display module comprising a substrate and a plurality of inorganic light-emitting elements on the substrate; and a frame configured to support the display module. The frame includes a panel comprising aluminum disposed on the rear side of the display module; and a support bar disposed on the rear side of the panel. The support bar may include steel to prevent deformation of the display module and the panel due to temperature changes.

[0015] FIG. 1 is a perspective view of a display device according to one embodiment of the present disclosure.

[0016] FIG. 2 is an exploded view of the main components of a display device according to one embodiment of the present disclosure.

[0017] FIG. 3 is an enlarged cross-sectional view of a part of a display module according to one embodiment of the present disclosure.

[0018] FIG. 4 is a perspective view showing the rear side of a display module according to one embodiment of the present disclosure.

[0019] FIG. 5 is a perspective view of an assembly of a display module and a frame according to one embodiment of the present disclosure.

[0020] FIG. 6 is an exploded perspective view of an assembly of a display module and a frame according to one embodiment of the present disclosure.

[0021] FIG. 7 is a perspective view of a frame according to one embodiment of the present disclosure.

[0022] FIG. 8 is a rear perspective view of a frame according to one embodiment of the present disclosure.

[0023] Figure 9 is a cross-sectional view along the line I-I' shown in Figure 5.

[0024] Figure 10 is an enlarged view of part A shown in Figure 9.

[0025] Figure 11 is an enlarged view of part B shown in Figure 9.

[0026] FIG. 12 is a cross-sectional view of an assembly of a display module and a frame according to one embodiment of the present disclosure.

[0027] FIG. 13 is a cross-sectional view of an assembly of a display module and a frame according to one embodiment of the present disclosure.

[0028] FIG. 14 is a cross-sectional view of an assembly of a display module and a frame according to one embodiment of the present disclosure.

[0029] FIG. 15 is a cross-sectional view of a part of a display device according to one embodiment of the present disclosure.

[0030] Figure 16 is a table showing bending (deformation) due to temperature change for each case.

[0031] The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments.

[0032] In relation to the description of the drawings, similar reference numerals may be used for similar or related components.

[0033] The singular form of the noun corresponding to the item may include one or multiple items, unless the relevant context clearly indicates otherwise.

[0034] In this document, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof.

[0035] The term "and / or" includes a combination of multiple related described components or any of the multiple related described components.

[0036] The terms "part," "module," and "component" may be implemented in hardware or software. Depending on the embodiments, a plurality of "parts," "modules," and "components" may be implemented as a single component, or a single "part," "module," or "component" may include a plurality of components.

[0037] Terms such as "first," "second," "third," or "first," "second," "third," etc., may be used simply to distinguish a component from other corresponding components and do not limit the components in other aspects (e.g., importance or order).

[0038] Where any (e.g., 1st) component is referred to as "coupled" or "connected" to another (e.g., 2nd) component, with or without the terms "functionally" or "communicationly," it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0039] Terms such as "include" or "have" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this document, and do not preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0040] When it is said that a component is "connected," "combined," "supported," or "in contact" with another component, this includes not only cases where the components are directly connected, combined, supported, or in contact, but also cases where they are indirectly connected, combined, supported, or in contact through a third component.

[0041] When it is said that a component is located "on" another component, this includes not only cases where one component is in contact with the other, but also cases where another component exists between the two components.

[0042] The meaning of "identical" includes items that are similar in attributes or similar within a certain range. Furthermore, "identical" implies "substantially identical." In the sense of being substantially identical, numerical values ​​that fall within the margin of error in manufacturing or differences that do not hold significance relative to a reference value should be understood as being included within the scope of being "identical."

[0043] Meanwhile, terms such as "front," "back," "left," "right," "up," and "down" used in the following description are defined based on the drawings, and the shape and position of each component are not limited by these terms. For example, "front" and "back" may each be defined based on the X-axis shown in the drawings. For example, "left" and "right" may each be defined based on the Y-axis shown in the drawings. For example, "up" and "down" may each be defined based on the Z-axis shown in the drawings. For example, based on the display device (1) shown in FIG. 1, the direction for displaying an image may be defined as the front (+X direction), and the side opposite to the front may be defined as the rear (-X direction). For example, the front (+X direction) may be substantially the same as the light emission direction of the plurality of inorganic light-emitting elements (50).

[0044] In the drawing, some components of the display device (1), including a plurality of inorganic light-emitting elements (50), may be micro-sized components with a size of several μm to several hundred μm, so for convenience of explanation, the scale of some components (e.g., a plurality of inorganic light-emitting elements (50), a substrate (40), a frame (100), etc.) may be exaggerated.

[0045] FIG. 1 is a perspective view of a display device according to one embodiment of the present disclosure. FIG. 2 is an exploded view of the main components of a display device according to one embodiment of the present disclosure. FIG. 3 is an enlarged cross-sectional view of a part of a display module according to one embodiment of the present disclosure. FIG. 4 is a perspective view showing the rear side of a display module according to one embodiment of the present disclosure.

[0046] The display device (1) may be a device that displays information, data, etc., as characters, shapes, graphs, images, etc. For example, a TV, PC, mobile device, digital signage, etc., may be implemented as the display device (1).

[0047] The display device (1) may include a display panel (20). The display panel (20) may be configured to display an image.

[0048] The display panel (20) may include a plurality of display modules (30A-30w). The display panel (20) may include a driving board that drives each of the display modules (30A-30w) and a TOCN board (Timing controller board) that generates timing signals required for controlling each of the display modules (30A-30w).

[0049] In the following, one (a / an) display module may be referred to as a display module (30), and the description of the display module (30) may be applied to each of the plurality of display modules (30A-30w).

[0050] The display device (1) may include a board (25). The board (25) may be configured to drive and / or control the display panel (20). The board (25) may include a circuit board for driving and / or controlling the display device (1). For example, the board (25) may include at least one of a power board for supplying power to the display panel (20), a control board for controlling the overall operation of the display panel (20), and a communication board for communicating with an external device.

[0051] The display device (1) may include a frame (100). The display device (1) may include a plurality of frames (100A-100w) configured to support a plurality of display modules (30A-30w). Each of the plurality of frames (100A-100w) may correspond to each of the plurality of display modules (30A-30w). Each of the plurality of frames (100A-100w) may support each of the plurality of display modules (30A-30w).

[0052] In the following, one (a / an) frame may be referred to as a frame (100), and a description of the frame (100) may be applied to each of the plurality of display modules (30A-30w).

[0053] The display device (1) may include a chassis (10). The chassis (10) may be configured to cover the rear of the display panel (20). The chassis (10) may be provided to cover the rear of a plurality of display modules (30A-30w) and / or the rear of a plurality of frames (100A-100w). The chassis (10) may form the rear exterior of the display device (1).

[0054] The chassis (10) can be installed on the floor via a stand or on a wall via a hanger, etc. The chassis (10) may be referred to as a case (10), a housing (10), a rear cover (10), etc.

[0055] Referring to FIGS. 1 and 2, a plurality of display modules (30A-30w) can be arranged vertically and horizontally so as to be adjacent to each other. The plurality of display modules (30A-30w) can be arranged in an M * N matrix form. In this embodiment, 49 plurality of display modules (30A-30w) are provided and arranged in a 7 * 7 matrix form, but there are no limitations on the number or arrangement method of the plurality of display modules (30A-30w).

[0056] Each of the plurality of display modules (30A-30w) can be mounted on a plurality of frames (100A-100w). Each of the plurality of display modules (30A-30w) can be coupled to a plurality of frames (100A-100w). The plurality of display modules (30A-30w) and the plurality of frames (100A-100w) can correspond one-to-one. For example, a display module (30A) can correspond to a first frame (100A).

[0057] As shown in the drawing, the display modules (30A-30w) can be applied to display devices such as PC (personal computer) monitors, high-resolution TVs and signage, electronic displays, etc. through a plurality of assembly arrangements in a matrix type.

[0058] Unlike what is shown in the drawing, the display modules (30A-30w) can each be installed and applied as a single unit in electronic products or battlefields requiring at least one wearable device, portable device, handheld device, and various displays. That is, the display device (1) may include a single display module (30).

[0059] Multiple display modules (30A-30w) may have the same configuration as each other. Therefore, the description of any one display module (30) described below may be equally applied to at least one of the other multiple display modules (30A-30w).

[0060] The display module (30) may be formed in a quadrangle type. The display module (30) may have a rectangular shape, a square shape, or other polygonal or geometric shapes, and its shape is not particularly limited. The display module (30) may include four edges (31, 32, 33, 34). For example, a pair of edges (31, 33) may be provided as short sides, and a pair of edges (32, 24) may be provided as long sides.

[0061] Multiple frames (100A-100w) may have the same configuration as each other. Therefore, the description of any one frame (100) described below may be equally applied to at least one of the other multiple frames (100A-100w).

[0062] The frame (100) may be formed in a quadrangle type. The frame (100) may have a rectangular shape, a square shape, or other polygonal or geometric shapes, and its shape is not particularly limited. The frame (100) may include four edges (101, 102, 103, 104). For example, a pair of edges (101, 103) may be provided as short sides, and a pair of edges (102, 104) may be provided as long sides.

[0063] Referring to FIG. 3, the display module (30) may include a substrate (40) and a plurality of inorganic light-emitting elements (50) mounted on the substrate (40). The plurality of inorganic light-emitting elements (50) may be mounted on a mounting surface (41) of the substrate (40). In FIG. 3, the thickness of some components, such as the substrate (40), may be exaggerated for convenience of explanation.

[0064] The substrate (40) may be formed in a quadrangle shape. As described above, the display module (30) may be provided in a square shape, and the substrate (40) may be formed in a square shape to correspond to the display module (30). The substrate (40) may be provided in a rectangular shape or a square shape, but the shape is not limited thereto, and any suitable shape may be implemented.

[0065] The substrate (40) may include a base substrate (42), a mounting surface (41) forming one side of the base substrate (42), a rear surface (43) forming the other side of the base substrate (42) and positioned opposite to the mounting surface (41), and a side surface (45, see FIG. 4) positioned between the mounting surface (41) and the rear surface (43).

[0066] The mounting surface (41) may be arranged to face a plurality of weapon light-emitting elements (50). The mounting surface (41) may be arranged to face a cover (70) to be described later. The rear surface (43) may be arranged to face the chassis (10).

[0067] The substrate (40) may include a TFT layer (Thin Film Transistor, 44) provided to drive inorganic light-emitting elements (50). The TFT layer (44) may be formed on a base substrate (42). The substrate (40) (specifically, the base substrate (42)) may include a glass material, and the substrate (40) may be referred to as a glass substrate (40). That is, the substrate (40) may include a COG (Chip on Glass) type substrate. Additionally, any suitable glass material may be used, such as silicon oxide (e.g., silica, silicon dioxide, SiO2, SiOx) or silicon oxynitride (SiO2). X N Y It may include one or more of the following: borosilicate glass (BSG), phosphoric acid glass (PSG), borosilicate glass (BPSG), etc.

[0068] The Thin Film Transistor (TFT) constituting the TFT layer (44) is not limited to a specific structure or type and can be composed of various embodiments. That is, the TFT of the TFT layer (44) according to one embodiment can be implemented as an LTPS (Low Temperature Poly Silicon) TFT, oxide TFT, Si (poly silicon, or a-silicon) TFT, as well as an organic TFT, graphene TFT, etc.

[0069] The TFT layer (44) can be replaced with a CMOS (Complementary Metal-Oxide Semiconductor) type or n-type MOS field-effect transistors (MOSFETs) or p-type MOSFETs transistor when the base substrate (42) of the substrate (40) is provided as a silicon wafer.

[0070] The substrate (40) may include a first pad electrode (44a) and a second pad electrode (44b). The first pad electrode (44a) and the second pad electrode (44b) may be provided to electrically connect a plurality of inorganic light-emitting elements (50) and a TFT layer (44). For example, the first pad electrode (44a) and the second pad electrode (44b) may be provided as a pair.

[0071] A plurality of inorganic light-emitting elements (50) may include inorganic light-emitting elements (50) formed from an inorganic material, with a width, length, and height each having a size of several μm to several tens of μm. For example, the inorganic light-emitting element (50) may have a short side length of 100 μm or less among the width, length, and / or height. For example, the inorganic light-emitting element (50) may be picked up from a sapphire or silicon wafer and transferred to a substrate (40). The wafer material may include, but is not limited to, a suitable material among silicon-on-insulator (SOI), germanium (Ge), and / or silicon-germanium (SiGe). For example, the inorganic light-emitting element (50) may be picked up and transferred through various methods, such as an electrostatic method using an electrostatic head or a stamp method using an elastic polymer material such as PDMS or silicon as a head. However, the present disclosure is not limited to the examples described above, and the inorganic light-emitting element (50) can be mounted on the substrate (40) in various ways.

[0072] A plurality of inorganic light-emitting elements (50) may be referred to as a plurality of micro LEDs (50). A plurality of display modules (30A-30w) may be referred to as a plurality of micro LED modules (30A-30w).

[0073] For example, each of the plurality of inorganic light-emitting elements (50) may be a light-emitting structure comprising a first semiconductor (58a), an active layer (58c), a second semiconductor (58b), a first contact electrode (57a) and a second contact electrode (57b).

[0074] Each of the plurality of inorganic light-emitting elements (50) may include a first semiconductor (58a) and a second semiconductor (58b). The second semiconductor (58b) may be closer to the substrate (40) than the first semiconductor (58a). The first semiconductor (58a) and the second semiconductor (58b) may be arranged with an active layer (58c) in between. Either of the first semiconductor (58a) and the second semiconductor (58b) may be an n-type semiconductor, and the other of the first semiconductor (58a) and the second semiconductor (58b) may be a p-type semiconductor. Electrons may exist in either of the first semiconductor (58a) and the second semiconductor (58b), and holes may exist in the other of the first semiconductor (58a) and the second semiconductor (58b). Light may be generated while electrons and holes recombine in the active layer (58c).

[0075] Each of the plurality of inorganic light-emitting elements (50) may include an active layer (58c). The active layer (58c) may include a material that emits light through the recombination of electrons and holes. The active layer (58c) may be disposed between the first semiconductor (58a) and the second semiconductor (58b). The active layer (58c) may be formed between the first semiconductor (58a) and the second semiconductor (58b). The active layer (58c) may be provided to generate light.

[0076] Each of the plurality of inorganic light-emitting elements (50) may include a light-emitting surface (54). The inorganic light-emitting element (50) may include a bottom surface (56) positioned opposite the light-emitting surface (54). The inorganic light-emitting element (50) may include a side surface (55) connecting the light-emitting surface (54) and the bottom surface (56). The light-emitting surface (54) may be positioned to face forward. The light-emitting surface (54) may emit light toward the cover (70).

[0077] Each of the plurality of inorganic light-emitting elements (50) may include a first contact electrode (57a) and a second contact electrode (57b). Although not clearly illustrated in the drawing, either the first contact electrode (57a) and the second contact electrode (57b) may be electrically connected to the first semiconductor (58a), and the other of the first contact electrode (57a) and the second contact electrode (57b) may be electrically connected to the second semiconductor (58b). The first contact electrode (57a) may be configured to correspond to the first pad electrode (44a), and the second contact electrode (57b) may be configured to correspond to the second pad electrode (44b). For example, the first contact electrode (57a) and the second contact electrode (57b) may be provided as a pair.

[0078] For example, the first contact electrode (57a) and the second contact electrode (57b) may be in the form of a flip chip arranged horizontally and facing the same direction (opposite direction of light emission).

[0079] The first contact electrode (57a) and the second contact electrode (57b) may be formed on the bottom surface (56). That is, the first contact electrode (57a) and the second contact electrode (57b) may be positioned on the opposite side of the light-emitting surface (54) and thus on the opposite side of the direction in which light is irradiated. The first contact electrode (57a) and the second contact electrode (57b) may be positioned to face the mounting surface (41) and may be arranged to be electrically connected to the TFT layer (44). A light-emitting surface (54) that irradiates light in the opposite direction to the direction in which the first contact electrode (57a) and the second contact electrode (57b) are positioned may be positioned.

[0080] Accordingly, light generated in the active layer (58c) can be irradiated through the light-emitting surface (54) without interference with the first contact electrode (57a) and / or the second contact electrode (57b).

[0081] 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), respectively, formed on the mounting surface (41) side of the substrate (40).

[0082] The display module (30) may include a conductive adhesive layer (47) configured to electrically connect an inorganic light-emitting element (50) and a substrate (40). The conductive adhesive layer (47) may be configured to mediate the electrical bonding of contact electrodes (57a, 57b) and pad electrodes (44a, 44b). The conductive adhesive layer (47) may electrically bond the first contact electrode (57a) and the first pad electrode (44a), and electrically bond the second contact electrode (57b) and the second pad electrode (44b). The conductive adhesive layer (47) may be disposed on the substrate (40). At least a portion of the conductive adhesive layer (47) may be disposed between the first contact electrode (57a) and the first pad electrode (44a) and between the second contact electrode (57b) and the second pad electrode (44b).

[0083] For example, the conductive adhesive layer (47) may be an anisotropic conductive layer. The anisotropic conductive layer may have a structure in which an anisotropic conductive adhesive is attached to a protective film and conductive balls (47a) are dispersed in the adhesive resin. The conductive balls (47a) are conductive particles (e.g., spheres or other shapes) surrounded by a thin insulating film, and can electrically connect conductors to each other as the insulating film breaks under pressure.

[0084] When multiple inorganic light-emitting elements (50) are mounted on a substrate (40), if pressure is applied to an anisotropic conductive layer, the insulating film of the conductive ball (47a) is broken so that the contact electrodes (57a, 57b) of the inorganic light-emitting elements (50) and the pad electrodes (44a, 44b) of the substrate (40) can be electrically connected.

[0085] The anisotropic conductive layer (47) may include an anisotropic conductive film (ACF) in the form of a film and / or anisotropic conductive paste (ACP) in the form of a paste.

[0086] However, the present disclosure is not limited to the examples described above, and the conductive adhesive layer (47) may include solder or other suitable conductive material. After a plurality of inorganic light-emitting elements (50) are aligned on a substrate (40), the plurality of inorganic light-emitting elements (50) may be bonded to the substrate (40) through a reflow process.

[0087] A plurality of inorganic light-emitting elements (50) may include a red light-emitting element (51), a green light-emitting element (52), and a blue light-emitting element (53). The light-emitting elements (50) may be mounted on the mounting surface (41) of a substrate (40) by forming a series of red light-emitting elements (51), green light-emitting elements (52), and blue light-emitting elements (53) as a single unit. A series of red light-emitting elements (51), green light-emitting elements (52), and blue light-emitting elements (53) may form a single pixel. At this time, the red light-emitting element (51), green light-emitting element (52), and blue light-emitting element (53) may each form a sub-pixel.

[0088] For example, the red light-emitting element (51), the green light-emitting element (52), and the blue light-emitting element (53) may be arranged in a line at predetermined intervals, or may be arranged in a different shape such as a triangle, but any suitable arrangement of shapes that can be substituted or used together may be used.

[0089] The substrate (40) may include a light-absorbing layer (44c) to absorb external light and improve contrast. The light-absorbing layer (44c) may be formed on the entire mounting surface (41) of the substrate (40). The light-absorbing layer (44c) may be formed between the TFT layer (44) and the conductive layer (47).

[0090] The display module (30) may further include a black matrix (48) formed between a plurality of inorganic light-emitting elements (50).

[0091] The black matrix (48) can perform the function of complementing the light absorption layer (44c) formed entirely on the mounting surface (41) side of the substrate (40). That is, the black matrix (48) can improve the contrast of the screen by absorbing external light and making the substrate (40) appear black. Preferably, the black matrix (48) can have a black color.

[0092] According to one embodiment of the present disclosure, a black matrix (48) is formed to be placed between pixels formed by a series of red light-emitting elements (51), green light-emitting elements (52), and blue light-emitting elements (53). However, the black matrix (48) may be formed more finely to partition each of the light-emitting elements (51, 52, 53) which are subpixels.

[0093] The black matrix (48) can be formed in a grid shape having horizontal and vertical patterns to be placed between pixels and / or subpixels.

[0094] The black matrix (48) can be formed by applying a light-absorbing ink onto a conductive adhesive layer (47) and then curing it through an ink-jet process, or by coating a light-absorbing film onto the conductive adhesive layer (47).

[0095] That is, in the conductive adhesive layer (47) formed entirely on the mounting surface (41), a black matrix (48) can be formed between a plurality of inorganic light-emitting elements (50) that are not mounted.

[0096] The display module (30) may include a cover (70) provided to cover a substrate (40) and a plurality of inorganic light-emitting elements (50). The cover (70) may include a functional film having optical performance. The cover (70) can protect the substrate (40) and the plurality of inorganic light-emitting elements (50) from external forces. The cover (70) can prevent foreign substances, etc. from entering the substrate (40) and the plurality of inorganic light-emitting elements (50). As an example, the cover (70) can form the front surface (301) of the display module (30).

[0097] The display module (30) may include a cover adhesive layer (75). The cover adhesive layer (75) may be configured to attach the cover (70) to the substrate (40) and the plurality of inorganic light-emitting elements (50). The cover adhesive layer (75) may minimize light loss or reflection. For example, the cover adhesive layer (75) may be an Optically Clear Adhesive (OCA) in the form of a film such as double-sided tape or an Optically Clear Resin (OCR) in the form of an amorphous liquid.

[0098] The display module (30) may include a heat dissipation member (60) provided to dissipate heat generated from the substrate (40). The heat dissipation member (60) may be attached to the rear surface (43) of the substrate (40). For example, the heat dissipation member (60) may form a part of the rear surface (302) of the display module.

[0099] The display module (30) may include an adhesive tape (70) placed between the rear surface (43) and the heat dissipation member (60) to bond the rear surface (43) of the substrate (40) and the heat dissipation member (60).

[0100] A plurality of inorganic light-emitting elements (50) can be electrically connected sequentially to an upper wiring layer, a side wiring layer, and a rear wiring layer (43b). The upper wiring layer can be formed on the rear side of a conductive layer (47). The side wiring can be formed on the side (45) of the substrate (40). The rear wiring layer (43b) can be formed on the rear side (43). An insulating layer (43c) covering the rear wiring layer (43b) can be provided on the rear side of the rear wiring layer (43b).

[0101] Referring to FIG. 4, the display module (30) may include a driving circuit board (80) provided to electrically control a plurality of inorganic light-emitting elements (50) mounted on a mounting surface (41) of a substrate (40). The driving circuit board (80) may be formed as a printed circuit board.

[0102] The display module (30) may include a flexible film (81) connecting the driving circuit board (80) and the rear wiring layer (43b) so that the driving circuit board (80) is electrically connected to a plurality of inorganic light-emitting elements (50).

[0103] One end of the flexible film (81) can be connected to a rear connection pad (43d) that is placed on the rear surface (43) of the substrate (40) and electrically connected to a plurality of inorganic light-emitting elements (50).

[0104] The rear connection pad (43d) can be electrically connected to the rear wiring layer (43b). Accordingly, the rear connection pad (43d) can electrically connect the rear wiring layer (43b) and the flexible film (81).

[0105] As the flexible film (81) is electrically connected to the rear connection pad (43d), it can transmit power and electrical signals from the driving circuit board (80) to a plurality of inorganic light-emitting elements (50) (e.g., move, transmit, supply, or conduct).

[0106] For example, the flexible film (81) can be formed from an FFC (Flexible Flat cable) or a COF (Chip On Film), etc.

[0107] The flexible film (81) may include a first flexible film (81a) and a second flexible film (81b). The first flexible film (81a) can transmit data signals from the driving circuit board (80) to the substrate (40). For example, the first flexible film (81a) may be provided as a COF. The second flexible film (81b) can transmit power from the driving circuit board (80) to the substrate (40). For example, the second flexible film (81b) may be provided as an FFC.

[0108] In the drawings, the first flexible film (81a) is depicted as being provided as a single unit, but the present disclosure is not limited to what is depicted in the drawings, and the first flexible film (81a) may be provided as a plurality of first flexible films (81a). In the drawings, the second flexible film (81b) appears to be provided as a plurality of units, but the present disclosure is not limited to what is depicted in the drawings, and the second flexible film (81b) may be provided as a single unit.

[0109] The driving circuit board (80) can be electrically connected to the board (25, see FIG. 2). The board (25) can be placed on the rear side of the frame (100), and the board (25) can be connected to the driving circuit board (80) via a cable.

[0110] The heat dissipation member (60) may be configured to be in contact with the substrate (40). The heat dissipation member (60) and the substrate (40) may be bonded by an adhesive tape (65, see FIG. 3) placed between the rear surface (43) of the substrate (40) and the heat dissipation member (60).

[0111] The heat dissipation member (60) may be formed of a material with high thermal conductivity or implemented with a configuration with high thermal conductivity. For example, the heat dissipation member (60) may be made of aluminum.

[0112] Heat generated from a plurality of inorganic light-emitting elements (50) mounted on a substrate (40) and a TFT layer (44) of the substrate (40) can be transferred to a heat dissipation member (60). Heat generated from the substrate (40) is easily transferred to the heat dissipation member (60), and the substrate (40) can be prevented from rising above a certain temperature.

[0113] FIG. 5 is a perspective view of an assembly of a display module and a frame according to one embodiment of the present disclosure. FIG. 6 is an exploded perspective view of an assembly of a display module and a frame according to one embodiment of the present disclosure.

[0114] Referring to FIGS. 5 and 6, the frame (100) may be configured to support the display module (30). The display module (30) and the frame (100) may be combined. When the display module (30) and the frame (100) are combined, the center of the display module (30) and the center of the frame (100) may coincide.

[0115] The frame (100) can be attached to the rear side of the display module (30). The frame (100) can be attached to the rear side (302, see FIG. 3) of the display module (30). The rear side (302) of the display module (30) can be attached to the frame (100). An adhesive (90, see FIG. 9) can be used to bond the display module (30) and the frame (100).

[0116] The size of the display module (30) may be smaller than the size of the frame (100). The area of ​​the display module (30) may be smaller than the area of ​​the frame (100). For example, while the display module (30) and the frame (100) are combined, each of the edges (31, 32, 33, 34) of the display module (30) may protrude outwardly beyond the edges (101, 102, 103, 104) of the frame (100). The edge (31) of the display module (30) may protrude outwardly beyond the edge (101) of the frame (100). The edge (32) of the display module (30) may protrude outwardly beyond the edge (102) of the frame (100). The edge (33) of the display module (30) may protrude outwardly beyond the edge (103) of the frame (100). The edge (34) of the display module (30) may protrude outwardly beyond the edge (104) of the frame (100). By doing so, a gap (g, see FIG. 15) may be formed between the plurality of display modules (30A-30w), and interference between the plurality of display modules (30A-30w) may be reduced and / or prevented. A detailed explanation thereof will be provided later.

[0117] FIG. 7 is a perspective view of a frame according to one embodiment of the present disclosure. FIG. 8 is a rear perspective view of a frame according to one embodiment of the present disclosure. FIG. 9 is a plan cross-sectional view along the line I-I' shown in FIG. 5.

[0118] Referring to FIGS. 7 through 9, the frame (100) may include a panel (110) and a support bar (120).

[0119] The panel (110) can be attached to the display module (30). The panel (110) can be attached to the rear (302) of the display module (30). The panel (110) can be attached to the rear (302) of the display module (30) by an adhesive (90). The front (110a) of the panel (110) can be positioned to face the rear (302) of the display module (30). The rear (110b) of the panel (110) can be positioned to face the chassis (10, see FIG. 2).

[0120] The panel (110) may have a predetermined thickness along the front-rear direction (X direction). For example, the thickness of the panel (110) along the front-rear direction may be thicker than the thickness of the display module (30) along the front-rear direction.

[0121] For example, the panel (110) may include a roughly rectangular plate shape. The border of the panel (110) may be the border (101, 102, 103, 104) of the frame (100).

[0122] The panel (110) may have a first coefficient of thermal expansion. For example, the panel (110) may comprise aluminum or other suitable material having a relatively high coefficient of thermal expansion.

[0123] A support bar (120) may be provided at the rear of the panel (110). The support bar (120) may be positioned closer to the chassis (10) than the panel (110). The support bar (120) may be spaced rearward from the panel (110) (see spacing distance (S) in FIG. 9).

[0124] The support bar (120) may have a second coefficient of thermal expansion. The second coefficient of thermal expansion may be lower than the first coefficient of thermal expansion. That is, the coefficient of thermal expansion of the support bar (120) may be lower than the coefficient of thermal expansion of the panel (110). For example, the support bar (120) may comprise steel or other suitable material having a relatively low coefficient of thermal expansion. The support bar (120) may be provided to prevent and / or reduce bending or deformation of the display module (30) and the panel (110). A detailed description thereof will be provided later.

[0125] The support bar (120) may include a first end portion (121) and a second end portion (122) (see FIGS. 9 to 11). The first end portion (121) of the support bar (120) may refer to a specific portion including one end (121a) of the support bar (120). The second end portion (122) of the support bar (120) may refer to a specific portion including the other end (122a) of the support bar (120).

[0126] In the drawings, the support bar (120) is shown extending along the long side direction (e.g., Y direction) of the panel (110), but the present disclosure is not limited to what is shown in the drawings. For example, the support bar (120) may extend along the short side direction (e.g., Z direction) of the panel (110). Additionally, if the frame (100) has a square shape, the support bar (120) may extend along one direction without distinction between the long side direction and the short side direction of the panel (110).

[0127] The frame (100) may include a plurality of support bars (120). For example, referring to FIG. 8, the frame (100) may include a first support bar (120A) and a second support bar (120B). The first support bar (120A) and the second support bar (120B) may have substantially the same configuration. The first support bar (120A) and the second support bar (120B) may extend along the long side direction of the panel (110). The first support bar (120A) and the second support bar (120B) may be spaced apart along the short side direction of the panel (110).

[0128] However, the present disclosure is not limited to the examples described above. There are no restrictions on the number, shape, position, etc. of the support bars (120). For example, the frame (100) may include a single support bar (120) positioned to pass through the center of the frame (100). For example, the frame (100) may include a plurality of support bars (120), each extending along the short side direction of the panel (110) and spaced apart along the long side direction of the panel (110). The support bars (120) may include various shapes to suppress deformation (bending) of the display module (30) and the panel (110).

[0129] The support bar (120) may be referred to as a support pin (120), a support member (120), etc.

[0130] The frame (100) may include a first connecting portion (130). The first connecting portion (130) may be formed on the rear side of the panel (110). The first connecting portion (130) may be formed on the rear side (110b) of the panel (110). The first connecting portion (130) may protrude from the rear side (110b) of the panel (110).

[0131] The first connecting portion (130) may be configured to hold the first end (121) of the support bar (120). The first end (121) of the support bar (120) may be configured to be connectable to the first connecting portion (130) (i.e., attached, fixed, or otherwise fastened). The first end (121) of the support bar (120) may be configured to be fixed to the first connecting portion (130). Additionally, as used herein, the term “connectable” may include any suitable connecting configuration or method that is permanent, temporary, and / or detachable.

[0132] The number of first connecting parts (130) may correspond to the number of support bars (120). For example, the frame (100) may include a plurality of first connecting parts (130A, 130B). The first connecting part (130A) may be connected to the first end (121) of the first support bar (120A). The first connecting part (130B) may be connected to the first end (121) of the second support bar (120B).

[0133] The frame (100) may include a second connecting portion (140). The second connecting portion (140) may be formed on the rear side of the panel (110). The second connecting portion (140) may be formed on the rear side (110b) of the panel (110). The second connecting portion (140) may protrude from the rear side (110b) of the panel (110).

[0134] The second connecting part (140) may be configured to hold the second end (122) of the support bar (120). The second end (122) of the support bar (120) may be configured to be connectable to the second connecting part (140). The support bar (120) may be configured so that the second end (122) is fixed to the second connecting part (140). The second connecting part (140) may be spaced apart from the first connecting part (130). The second connecting part (140) may be spaced apart from the first connecting part (130) along the extension direction of the support bar (120).

[0135] The number of second connecting parts (140) may correspond to the number of support bars (120). For example, the frame (100) may include a plurality of second connecting parts (140A, 140B). The second connecting part (140A) may be connected to the second end (122) of the first support bar (120A). The second connecting part (140B) may be connected to the second end (122) of the second support bar (120B).

[0136] The frame (100) may include a reinforcing member (150). The reinforcing member (150) may be configured to reinforce the strength of the panel (110). The reinforcing member (150) may be formed on the rear side of the panel (110). The reinforcing member (150) may be formed on the rear side (110b) of the panel (110). A second connecting member (140) may protrude from the rear side (110b) of the panel (110). Although the drawing shows two reinforcing members (150), there is no limit to the number of reinforcing members (150).

[0137] The frame (100) may include a support member (160). The support member (160) may be provided to support between the first end (121) and the second end (122) of the support bar (120). The support member (160) may reduce and / or prevent sagging of the support bar (120). The support member (160) may include a through hole (161) into which the support bar (120) is inserted. Although the drawing shows two support members (160) supporting one support bar (120), there is no limitation on the number of support members (160).

[0138] Referring to FIG. 9, an adhesive (90) may be provided to join the display module (30) and the frame (100). The adhesive (90) may be provided to bond the display module (30) and the frame (100). The adhesive (90) may be placed between the display module (30) and the frame (100). The adhesive (90) may be placed between the rear (302) of the display module (30) and the front (110a) of the panel (110).

[0139] An adhesive (90) may be provided to cure between the display module (30) and the frame (100). The adhesive (90) may be provided to harden or cure in a high-temperature environment. Here, the high temperature may be a temperature relatively higher than room temperature. For example, the adhesive (90) may include an epoxy resin. For example, the adhesive (90) may cure in a range of approximately 75 to 100 degrees. As the adhesive (90) cures, the display module (30) and the frame (100) may be bonded. As the adhesive (90) cures, the display module (30) and the frame (100) may be joined. The display module (30) and the frame (100) may be bonded together by the adhesive (90) to form an assembly.

[0140] Generally, when components of different materials are bonded together by an adhesive, the assembly of the different material components may deform due to at least one temperature change. A display module and a frame bonded by an adhesive have different physical properties and may bend due to at least one temperature change. For example, when the adhesive between the display module and the frame is cured at a high temperature and then exposed to a room temperature environment, the display module and the frame may bend due to differences in physical properties. As the amount of thermal shrinkage (or thermal expansion) of the display module differs from that of the frame, the display module and the frame may bend. If the display module and the frame bend, the screen integrity of the display panel may be degraded, and the display device may fail to provide a flat screen. Additionally, at least one irregular gap may be formed between the display modules.

[0141] In contrast, according to the present disclosure, the frame (100) may include a support bar (120). The support bar (120) may have a coefficient of thermal expansion lower than the coefficient of thermal expansion of the panel (110). For example, the panel (110) may be made of aluminum, and the support bar (120) may be made of steel. The support bar (120) may prevent the display module (30) and the panel (110) from deforming due to at least one temperature change. For example, an adhesive (90) may be placed between the display module (30) and the frame (100) and cured at a high temperature to bond the display module (30) and the frame (100). When the display module (30) and the frame (100) are exposed from a high-temperature environment to a room-temperature environment after the adhesive (90) has cured, the support bar (120) may prevent the display module (30) and the panel (110) from shrinking. A support bar (120) having a relatively low coefficient of thermal expansion compared to the display module (30) and panel (110) can prevent and / or reduce bending of the display module (30) and / or panel (110) due to at least one temperature change after the adhesive (90) has cured. As a result, the screen integrity of the display panel (20) may not be degraded, and the display device (1) can provide a flat screen with improved stability and reliability. The gap between the display modules (30A-30w) can be maintained at a constant level.

[0142] FIG. 10 is an enlarged view of part A shown in FIG. 9. FIG. 11 is an enlarged view of part B shown in FIG. 9. FIG. 12 is a plan cross-sectional view of an assembly of a display module and a frame according to one embodiment of the present disclosure. FIG. 13 is a plan cross-sectional view of an assembly of a display module and a frame according to one embodiment of the present disclosure.

[0143] With reference to FIGS. 10 to 13, various examples of the joining method of the support bar (120) will be described.

[0144] At least one of the first end (121) and the second end (122) of the support bar (120) may be inserted and coupled to a coupling formed on the rear side of the panel (110). At least one of the first end (121) and the second end (122) of the support bar (120) may be hook-coupled to a coupling formed on the rear side of the panel (110). At least one of the first end (121) and the second end (122) of the support bar (120) may be rotatably coupled to a coupling formed on the rear side of the panel (110) (e.g., screw coupling, threaded fastening, or other suitable mechanism).

[0145] Referring to FIGS. 10 and 11, the first end (121) of the support bar (120) can be inserted and coupled to the first coupling part (130), and the second end (122) of the support bar (120) can be rotated and coupled to the second coupling part (140).

[0146] Referring to FIG. 10, the first coupling portion (130) may include a coupling groove (130g), and the first end portion (121) of the support bar (120) may be inserted into the coupling groove (130g). The coupling groove (130g) of the first coupling portion (130) may accommodate the first end portion (121) of the support bar (120).

[0147] Referring to FIG. 11, the second coupling portion (140) may include a thread (140t), and the second end portion (122) of the support bar (120) may include a thread (122t). As the second end portion (122) rotates relative to the second coupling portion (140), the thread (122t) of the second end portion (122) and the thread (140t) of the second coupling portion (140) may be configured to engage.

[0148] Referring to FIG. 12, the first end (121) of the support bar (120) may be inserted and coupled to the first coupling part (130), and the second end (122) of the support bar (120) may be inserted and coupled to the second coupling part (140). The first coupling part (130) may include a first coupling groove (130g). The second coupling part (140) may include a second coupling groove (140g). The first end (121) of the support bar (120) may be inserted into the first coupling groove (130g). The second end (122) of the support bar (120) may be inserted into the second coupling groove (140g).

[0149] Referring to FIG. 13, a first end (121) of a support bar (120) may be rotatably coupled to a first coupling part (130), and a second end (122) of a support bar (120) may be rotatably coupled to a second coupling part (140). The first end (121) of the support bar (120) may include a first screw thread (121t). The second end (122) of the support bar (120) may include a second screw thread (122t). The first coupling part (130) may include a third screw thread (130t) provided to engage with the first screw thread (121t). The second coupling part (140) may include a fourth screw thread (140t) provided to engage with the second screw thread (122t).

[0150] However, the present disclosure is not limited to the examples illustrated in FIGS. 10 to 13. A first end (121) of the support bar (120) may be coupled to a first coupling part (130) by various known coupling methods, and a second end (122) of the support bar (120) may be coupled to a second coupling part (140) by various known coupling methods.

[0151] FIG. 14 is a cross-sectional view of an assembly of a display module and a frame according to one embodiment of the present disclosure.

[0152] The panel (110) of the frame (100) may be made of a single layer or multiple layers.

[0153] For example, the panel (110) may include a single layer (111) (see FIGS. 9 to 11). The single layer (111) may form the front (110a) and rear (110b) of the panel (110). The single layer (111) may include aluminum.

[0154] For example, referring to FIG. 14, the panel (110) may include a core layer (112), a first skin layer (114), and a second skin layer (113). The first skin layer (114) is provided on a first surface of the core layer (112) and may be attached to the rear surface (302) of the display module (30). The first skin layer (114) may be attached to the rear surface (302) of the display module (30) by an adhesive (90). The first skin layer (114) may form the front surface (110a) of the panel (110). The second skin layer (113) may be provided on a second surface opposite to the first surface of the core layer (112). The second skin layer (113) may be positioned to face the support bar (120). The second skin layer (113) can form the rear surface (110b) of the panel (110).

[0155] For example, the core layer (112) may include plastic. The core layer (112) may include polyethylene (PE), and the core layer (112) may be referred to as a PE layer. For example, the first skin layer (114) and the second skin layer (113) may include aluminum, and the first skin layer (114) may be referred to as a first aluminum layer, and the second skin layer (113) may be referred to as a second aluminum layer.

[0156] FIG. 15 is a cross-sectional view of a part of a display device according to one embodiment of the present disclosure.

[0157] FIG. 15 illustrates two display modules (30A, 30H) among a plurality of display modules (30A-30w) as an example. The two display modules (30A, 30H) may represent the plurality of display modules (30A-30w). For convenience of explanation, the display module (30A) may be referred to as the first display module (30A), and the display module (30H) may be referred to as the second display module (30H).

[0158] FIG. 15 illustrates two frames (100A, 100H) among a plurality of frames (100A-100w) as an example. The two frames (100A, 100H) may represent the plurality of frames (100A-100w). For convenience of explanation, frame (100A) may be referred to as the first frame (100A), and frame (100H) may be referred to as the second frame (100H).

[0159] The first frame (100A) may correspond to the first display module (30A). The first display module (30A) may be supported by the first frame (100A). The first display module (30A) and the first frame (100A) may be joined together by an adhesive (90). The first display module (30A) and the first frame (100A) may be bonded together.

[0160] The second frame (100H) may correspond to the second display module (30H). The second display module (30H) may be supported by the second frame (100H). The second display module (30H) and the second frame (100H) may be joined together by an adhesive (90). The second display module (30H) and the second frame (100H) may be bonded together.

[0161] As described above, the size of the display module (30) may be smaller than the size of the frame (100). The edge (101A) of the first frame (100A) may protrude outwardly beyond the edge (31A) of the first display module (30A). The edge (103H) of the second frame (100H) may protrude outwardly beyond the edge (33H) of the second display module (30H). The edge (103H) of the second frame (100H) may be positioned to be in contact with the edge (101A) of the first frame (100A). Thus, the edge (31A) of the first display module (30A) and the edge (33H) of the second display module (30H) may be configured to be spaced apart. That is, a gap (g) may be formed between the first display module (30A) and the second display module (30H).

[0162] Generally, when multiple display modules are arranged in an M * N matrix, collisions between the display modules may occur. In this case, at least one edge of a display module may be damaged by impact. Additionally, when tiling or assembling the display modules, a significant amount of time may be required to minimize collisions between adjacent display modules.

[0163] In contrast, according to the present disclosure, when a plurality of display modules (30A-30w) are arranged in an M * N matrix form, the display modules (30A-30w) may not interfere with each other. Since the size of the frame (100) is larger than the size of the display module (30), the edge of one display module (30) may be spaced apart from the edge of an adjacent display module (30). A gap (g) may be formed between one display module (30) and another display module (30). That is, the plurality of display modules (30A-30w) may be configured to be spaced apart from each other. This prevents collisions between the display modules (30A-30w) and damage caused therefrom. Additionally, the process of tiling the plurality of display modules (30A-30w) to create a screen may proceed more easily. The manufacturing efficiency of the display device (1) may be improved.

[0164] FIG. 16 is a table showing bending (deformation) due to temperature change by case. The table shown in FIG. 16 is merely an experimental example, and the present disclosure may include various embodiments.

[0165] Referring to FIG. 16, Case 1, Case 2, and Case 3 all include a display module (30) with a thickness of 0.5 mm and a panel (110) with a thickness of 4.0 mm. In Case 1, Case 2, and Case 3, the substrate (40) of the display module (30) includes borosilicate glass. Case 1, Case 2, and Case 3 may be substantially identical except for the support bars (120). Case 1 does not include support bars (120). Case 2 includes two support bars (120), each with a diameter of 2 mm. Case 3 includes two support bars (120), each with a diameter of 5 mm. In the case of Case 2 and Case 3, the two support bars (120) may be spaced apart along the vertical direction (Z direction).

[0166] Cases 1, 2, and 3 can be exposed to a room temperature environment of approximately 20 degrees after the adhesive (90) has been cured in a high temperature environment of approximately 80 degrees. At this time, the maximum displacement amount according to the temperature change of each case is as follows.

[0167] In the case of Case 1, the maximum displacement of the assembly of the display module (30) and the frame (100) is 1.113 mm. In the case of Case 2, the maximum displacement of the assembly of the display module (30) and the frame (100) is 0.583 mm. In the case of Case 3, the maximum displacement of the assembly of the display module (30) and the frame (100) is 0.437 mm.

[0168] The maximum displacement of Case 2 and Case 3 is smaller than the maximum displacement of Case 1. When the frame (100) includes a support bar (120), the deformation (bending) of the joint of the display module (30) and the frame (100) can be more effectively reduced / suppressed compared to the case where the frame (100) does not include a support bar (120).

[0169] The maximum displacement of Case 3 is smaller than the maximum displacement of Case 2. As the diameter of the support bar (120) increases, the support bar (120) can more effectively reduce / suppress the deformation (bending) of the assembly of the display module (30) and the frame (100). However, although not shown in FIG. 16, the maximum displacement of the case in which the diameter of each support bar (120) exceeds approximately 5 mm does not differ significantly from the maximum displacement of Case 3. That is, when the diameter of the support bar (120) increases beyond a certain value, the effect of reducing the deformation (bending) of the assembly of the display module (30) and the frame (100) may not increase significantly.

[0170] Of course, the numerical value described in FIG. 16 may vary depending on the shape, size, arrangement, number, material, etc. of each component (display module (30), panel (110), support bar (120)) of the display device (1).

[0171] According to various exemplary embodiments of the present disclosure, a display device (1) may include: a display module (30) comprising a substrate (40) and a plurality of inorganic light-emitting elements (50) mounted on the substrate; a frame (100) configured to support the display module; and an adhesive (90) provided to cure between the display module and the frame to join the display module and the frame. The frame (100) may include a panel (110) having a first coefficient of thermal expansion, which is attached to the rear surface (302) of the display module (30) by the adhesive (90). The frame (100) may include a support bar (120) provided on the rear side of the panel (110). The support bar (120) may have a second thermal expansion coefficient lower than the first thermal expansion coefficient to prevent and / or reduce bending of the display module (30) and the panel (110) due to temperature changes after the adhesive (90) is cured.

[0172] The panel (110) may include aluminum. The support bar (120) may include steel.

[0173] The above panel (110) may include a core layer (112); a first skin layer (114) provided on a first surface of the core layer and attached to the rear surface of the display module; and a second skin layer (113) provided on a second surface opposite to the first surface of the core layer.

[0174] The core layer (112) may include plastic, resin, polymer and / or other suitable materials. The first skin layer (114) and the second skin layer (113) may include aluminum.

[0175] The size of the display module (30) may be smaller than the size of the frame (100).

[0176] While the display module (30) and the frame (100) are combined, the edge of the display module (30) may protrude outward beyond the edge of the frame (100).

[0177] The display module (30) may be a first display module (30A), and the frame (100) may be a first frame (100A) corresponding to the first display module. The display device (1) may further include a second display module (30H); and a second frame corresponding to the second display module, wherein the edge of the second frame is arranged to be in contact with the edge of the first frame (100H).

[0178] A gap (g) may be formed between the first display module (30A) and the second display module (30H).

[0179] The above frame may include a first coupling portion (130) formed on the rear surface of the panel; and a second coupling portion (140) formed on the rear surface of the panel and spaced apart from the first coupling portion.

[0180] The first end (121) of the support bar (120) may be configured to be connectable to the first connecting part (130). The second end (122) of the support bar (120) may be configured to be connectable to the second connecting part (140).

[0181] The first end (121) of the support bar (120) can be inserted and coupled to the first coupling part. The second end (122) of the support bar (120) can be rotatably coupled to the second coupling part.

[0182] The first coupling portion (130) may include a first coupling groove (130g). The second coupling portion (140) may include a second coupling groove (140g). The first end portion (121) of the support bar (120) may be inserted into the first coupling groove. The second end portion (122) of the support bar (120) may be inserted into the second coupling groove.

[0183] The first end (121) of the support bar (120) may include a first screw thread (121t). The second end (122) of the support bar (120) may include a second screw thread (122t). The first coupling part (130) may include a third screw thread (130t) provided to engage with the first screw thread. The second coupling part (140) may include a fourth screw thread (140t) provided to engage with the second screw thread.

[0184] The above substrate (40) may include glass.

[0185] The adhesive (90) may include epoxy resin.

[0186] According to various exemplary embodiments of the present disclosure, a display device (1) may include: a display module (30) comprising a substrate (40) and a plurality of inorganic light-emitting elements (50) mounted on the substrate; and a frame (100) configured to support the display module (30). The frame (100) may include a panel (110) attached to the rear surface (302) of the display module (30). The panel (110) may include aluminum. The frame (100) may include a support bar (120) positioned at the rear side of the panel (110) to prevent the display module (30) and the panel (110) from deforming due to temperature changes. The support bar (120) may include steel.

[0187] The display device (1) may include an adhesive (90) that is provided to cure between the display module (30) and the frame (100) so as to bond the display module (30) and the frame (100).

[0188] The adhesive (90) may be provided to cure in a range of 75 to 100 degrees.

[0189] The size of the display module (30) may be smaller than the size of the frame (100).

[0190] The above display module (30) may be provided in multiple numbers, and the multiple display modules may be configured to be spaced apart from each other.

[0191] According to various exemplary embodiments of the present disclosure, the support bar (120) can reduce and / or prevent deformation (bending) caused by at least one temperature change of the display module (30) and / or frame (100) assembly. Thus, the display device (1) can implement and maintain a flat screen. Additionally, since a gap (g) is formed between adjacent display modules, the edges of the display module (30) can be prevented from being damaged by collision.

[0192] The effects, improvements, and / or advantages obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure pertains from the above description.

[0193] Specific embodiments have been illustrated and described above. However, the invention is not limited to the embodiments described above, and those skilled in the art may make various modifications without departing from the essence of the technical concept of the invention as described in the following claims.

Claims

1. A display module comprising a substrate and a plurality of inorganic light-emitting elements on the substrate; A frame configured to support the above-mentioned display module; and Includes an adhesive provided to cure between the display module and the frame; The above frame is, A panel disposed on the rear surface of the display module, having an adhesive interposed between it and the display module, and having a first coefficient of thermal expansion; and A display device comprising a support bar having a second thermal expansion coefficient lower than the first thermal expansion coefficient.

2. In Paragraph 1, The above panel includes aluminum, and The above support bar is a display device comprising steel.

3. In Paragraph 1, The above panel is, Core layer; A first skin layer provided on a first surface of the core layer and disposed on the rear surface of the display module; and A display device comprising: a second skin layer provided on a second surface opposite to the first surface of the core layer.

4. In Paragraph 3, The above core layer includes plastic, and A display device comprising the first skin layer and / or the second skin layer, wherein the first skin layer and / or the second skin layer comprises aluminum.

5. In Paragraph 1, A display device in which the size of the above display module is smaller than the size of the above frame.

6. In Paragraph 5, A display device in which the border of the above display module protrudes outward beyond the border of the above frame.

7. In Paragraph 6, The above display module is a first display module, and The above frame is a first frame corresponding to the first display module, and Second display module; and A display device further comprising: a second frame corresponding to the second display module, wherein the border of the second frame contacts the border of the first frame.

8. In Paragraph 7, A display device further comprising a gap between the first display module and the second display module.

9. In Paragraph 1, The above frame is, A first coupling portion disposed on the rear surface of the above panel; and A display device comprising: a second coupling portion disposed on the rear surface of the panel and spaced apart from the first coupling portion.

10. In Paragraph 9, The first end of the support bar is configured to be connectable to the first coupling part, and A display device configured such that the second end of the support bar can be coupled to the second coupling part.

11. In Paragraph 10, The first end of the support bar is inserted and coupled to the first coupling part, and A display device in which the second end of the support bar is rotatably coupled to the second coupling part.

12. In Paragraph 10, The above first coupling part includes a first coupling groove, and The above second coupling part includes a second coupling groove, and The first end of the support bar is disposed within the first coupling groove, and The second end of the support bar is a display device disposed within the second coupling groove.

13. In Paragraph 10, The first end of the support bar includes a first screw thread, The second end of the support bar includes a second screw thread, The first coupling portion includes a third screw thread provided to engage with the first screw thread, and A display device comprising a fourth screw thread that is provided to engage with the second screw thread, wherein the second coupling portion is provided to engage with the second screw thread.

14. In Paragraph 1, The above substrate is a display device comprising glass.

15. In Paragraph 1, The above adhesive is a display device containing epoxy resin.

16. In Paragraph 1, The above support bar is provided to prevent and / or reduce bending of the display and / or panel due to temperature changes after the adhesive is cured.

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