Patent Description:
Embodiments of the disclosure relate to a display module, a display panel, and a display apparatus, and more particularly, to a display apparatus including a display panel including a plurality of display modules formed by mounting a plurality of inorganic light emitting diodes.

A display apparatus is a type of output device that visually displays data information, such as text or graphics, and images.

A liquid crystal panel or an organic light emitting diode (OLED) panel that is formed by depositing an OLED on a substrate has been used for a display apparatus. However, the liquid crystal panel has difficulties such as a slow reaction time, and large power consumption. Further, the liquid crystal panel has difficulties in the compact design because it does not emit light itself and thus requires a backlight. In addition, OLED panels have a short service life and poor production yield rates. Accordingly, as a new panel to replace the panels, a micro light emitting diode (micro LED or µLED) display panel that mounts an inorganic light emitting diode on a substrate and uses the inorganic light emitting diode itself as a pixel has been studied.

The micro LED display panel is one of the flat panel display panels and composed of a plurality of inorganic light emitting diodes (inorganic LEDs) of <NUM> micrometers or less. In comparison with liquid crystal display (LCD) panels that require a backlight, the micro LED display panel provides better contrast, response time, and energy efficiency. Both organic light emitting diodes (OLEDs) and micro LEDs corresponding to inorganic light emitting diodes have good energy efficiency, but the micro LEDs have better brightness and luminous efficiency and a longer service life than the OLEDs.

Because the micro LED display panel does not need a backlight and may have a minimized bezel, it is possible to implement compact and thin designs; and to have excellent brightness, resolution, power consumption, and durability.

In addition, because there is no complicated process, other than the process of picking up inorganic light emitting diodes from a wafer and transferring it to a substrate, the micro LED display panel may be manufactured in various resolutions and sizes according to the customer's order and it is easy to implement a big screen by assembling unit panel modules.

<CIT> discloses sub-displays with alignment structures and tiled displays fabricated from the sub-displays.

<CIT> discloses a magnetically actuated fastener.

<CIT> discloses a display apparatus with display modules.

Therefore, it is an aspect of the disclosure to provide a bezel-less display apparatus.

It is another aspect of the disclosure to provide a display panel and a display apparatus capable of minimizing a step and/or gap among a plurality of display modules.

It is another aspect of the disclosure to provide a display panel and a display apparatus capable of easily replacing one display module among a plurality of display modules.

Additional aspects of the disclosure will be set forth in part in the description which follows and, in part, will be understood from the description, or may be learned by practice of the disclosure.

These and/or other aspects of the disclosure will become apparent and more readily appreciated from the following description of embodiments, taken in conjunction with the accompanying drawings of which:.

Embodiments described in the disclosure and configurations shown in the drawings are merely examples of embodiments of the disclosure, and may be modified in various different ways at the time of filing of the present application to replace the described embodiments and drawings of the disclosure.

The singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. For a clear description, the shape and size of the elements may be emphasized in the drawings.

In this disclosure, the terms "including", "having", and the like are used to specify features, numbers, steps, operations, elements, components, or combinations thereof, but do not preclude the presence or addition of one or more of the features, elements, steps, operations, elements, components, or combinations thereof.

In addition, a plate in the disclosure includes a thin film or sheet, comprehensively.

Embodiments of the disclosure will be described more fully hereinafter with reference to the accompanying drawings.

<FIG> is a view illustrating an exterior of a display apparatus according to an embodiment of the disclosure. <FIG> is an exploded view of main components of the display apparatus illustrated in <FIG>. <FIG> is a view illustrating a rear surface of one display module among the plurality of display modules illustrated in <FIG>. <FIG> is a view illustrating a state in which a panel board is mounted on the display panel illustrated in <FIG>. <FIG> is a view illustrating a state in which the panel board and a frame are mounted on the display panel illustrated in <FIG>. <FIG> is a view illustrating a part of a cross section along line A-A' of <FIG>. <FIG> is an enlarged view illustrating a part B of <FIG>.

Referring to <FIG> and <FIG>, a display apparatus <NUM> is a device configured to display information, materials, data and the like with characters, figures, graphs, images, etc., and TV, personal computer (PC), mobile, and digital signage may be implemented with the display apparatus <NUM>. The display apparatus <NUM> may be installed on the ground by a stand (not shown) or may be installed on the wall.

According to an embodiment of the disclosure, the display apparatus <NUM> includes a display panel <NUM> on which an image is displayed, a frame <NUM> configured to support the display panel <NUM>, and a rear cover <NUM> configured to accommodate the display panel <NUM> and the frame <NUM>. The display panel <NUM> installed on the frame <NUM> may implement a screen of the display apparatus <NUM>.

The rear cover <NUM> forms a part of the exterior of the display apparatus <NUM>. The rear cover <NUM> may form a rear exterior of the display apparatus <NUM>. The rear cover <NUM> may be arranged to cover the rear of the frame <NUM>.

The rear cover <NUM> and the frame <NUM> may be formed of a metal or resin material to have rigidity, or a heat conductive material to rapidly diffuse and cool heat generated from the display panel <NUM>.

The frame <NUM> may have an approximately rectangular shape. The frame <NUM> may include a frame body <NUM> configured to cover the rear of the display panel <NUM> and an edge cover <NUM> arranged on an edge portion of the frame body <NUM>. The edge cover <NUM> may extend toward the front of the display apparatus <NUM>. The edge cover <NUM> may form an exterior of an upper surface, an exterior of a lower surface, and an exterior of a side surface of the display apparatus <NUM>.

The display panel <NUM> may be accommodated and supported by the frame <NUM>. Details of coupling between the frame <NUM> and the display panel <NUM> will be described later.

The display apparatus <NUM> may include a device board <NUM> arranged between the frame <NUM> and the rear cover <NUM>. The device board <NUM> may include a switching mode power supply configured to supply power required for driving the display apparatus <NUM>. The device board <NUM> may include a printed circuit board (PCB) configured to control an image displayed on the display panel <NUM>. The device board <NUM> may include a timing controller configured to adjust the amount of data transmitted to one or more panel boards <NUM> and configured to improve image quality. The device board <NUM> may include a signal processing board for data processing.

The display apparatus <NUM> may include the panel boards <NUM> arranged between the frame <NUM> and the display panel <NUM>. The panel boards <NUM> may be configured to control a plurality of display modules <NUM>. The panel boards <NUM> may be electrically connected to each of the plurality of display modules <NUM>. It is illustrated that eight panel boards <NUM> are provided, and each of the panel boards <NUM> is electrically connected to eight of the display modules <NUM>, respectively, in this embodiment, but the electrical connection between the panel boards <NUM> and the plurality of display modules <NUM> is not limited thereto. The panel boards <NUM> may be electrically connected to the device board <NUM>. The panel boards <NUM> may receive power or data from the device board <NUM>.

The frame <NUM> may include a board receiving portion <NUM> for accommodating the panel boards <NUM>. The board receiving portion <NUM> may be provided in a size and / or shape corresponding to the panel boards <NUM>. The board receiving portion <NUM> may be recessed from the front surface of the frame body <NUM>. Because the panel boards <NUM> are accommodated in the board receiving portion <NUM>, it is possible to reduce the thickness of the display apparatus <NUM>.

The display panel <NUM> includes the plurality of display modules <NUM> and a panel cover <NUM> arranged in front of the plurality of display modules <NUM>. The display panel <NUM> may be implemented as a large screen by tiling the plurality of display modules <NUM> on the panel cover <NUM>.

The plurality of display modules <NUM> may be arranged in an M * N matrix to be vertically and horizontally adjacent to each other. In the embodiment, <NUM> display modules <NUM> are installed in the frame <NUM> in an <NUM> * <NUM> matrix, but the number or arrangement of the plurality of display modules <NUM> is not limited thereto. Therefore, the number or arrangement of the plurality of display modules <NUM> may vary. The plurality of display modules <NUM> may have a flat shape or a curved shape and a curvature thereof may be variable.

The plurality of display modules <NUM> may have the same configuration. Therefore, the description of any one of the display modules <NUM> described below may be applied to all other display modules <NUM> in the same way.

Each of the display modules <NUM> includes a substrate <NUM> and a plurality of inorganic light emitting elements mounted on a front surface of the substrate <NUM>. The surface, on which the plurality of inorganic light emitting elements is mounted, may be referred to as a mounting surface 111a.

The substrate <NUM> may be formed by including materials such as polyimide (PI), FR4, and glass. A driver layer (not shown) including a pixel electrode (not shown) and a Thin Film Transistor (TFT) may be formed on the mounting surface 111a of the substrate <NUM> on which the plurality of inorganic light emitting elements is mounted. The substrate <NUM> may include a glass substrate. The substrate <NUM> may include a Chip on Glass (COG) type substrate.

The inorganic light emitting element may include an inorganic Light Emitting Diodes (LEDs) 119a, 119b, and 119c. The inorganic LEDs 119a, 119b, and 119c may be formed of inorganic material such as silicon (Si), sapphire, or gallium nitride (GaN). In comparison with an organic light emitting diode (OLED) formed of an organic material, the inorganic LEDs 119a, 119b, and 119c may be strong in oxygen and moisture and have a long service life and excellent power efficiency.

The inorganic LEDs 119a, 119b, and 119c may be picked up from the source wafer and directly mounted on the substrate <NUM>. The inorganic LEDs 119a, 119b, and 119c may be picked up and transferred through an electrostatic method using an electrostatic head or an adhesive method using elastic polymer materials such as polydimethylsiloxane (PDMS) or silicone as a head. A horizontal length, vertical length, and height of the inorganic LEDs 119a, 119b, and 119c may be several micrometers (µm) to several hundred micrometers (µm), respectively.

The inorganic LEDs 119a, 119b, and 119c may include a p-n diode, a first contact electrode, and a second contact electrode. The inorganic LEDs 119a, 119b, and 119c may be a flip chip type in which the first contact electrode and the second contact electrode are arranged in the same direction. The first contact electrode and the second contact electrode of the inorganic LEDs 119a, 119b, and 119c may be connected to an electrode of the substrate <NUM> through soldering. Alternatively, the inorganic LEDs 119a, 119b, and 119c may be connected to an electrode of the substrate <NUM> through an anisotropic conductive film including fine conductive particles. In addition, the inorganic LEDs 119a, 119b, and 119c may be a lateral or vertical type, or may be connected to an electrode of the substrate through a wire.

The inorganic LED 119a may be a red inorganic LED configured to generate red light, the inorganic LED 119b may be a green inorganic LED configured to generate green light, and the inorganic LED 119c may be a blue inorganic LED configured to generate blue light.

The inorganic LED 119a, the inorganic LED 119b, and the inorganic LED 119c may form a single LED group from among LED groups <NUM>. The single LED group from among the LED groups <NUM> may form a single pixel. That is, the inorganic LED 119a, the inorganic LED 119b, and the inorganic LED 119c form a red sub-pixel, a green sub-pixel, and a blue sub-pixel, respectively, and the red sub-pixel, the green sub-pixel, and the blue sub-pixel may form a single pixel.

In <FIG>, it is illustrated that the inorganic LED 119a, the inorganic LED 119b, and the inorganic LED 119c are arranged in a line, but an arrangement of the inorganic LEDs 119a, 119b, and 119c is not limited thereto. Therefore, the inorganic LED 119a, the inorganic LED 119b, and the inorganic LED 119c may be arranged in a triangular shape, or other various shapes.

A distance between the LED groups <NUM> may be constant. The distance between the LED groups <NUM> may be variously selected according to the resolution and size of the display apparatus <NUM>.

A black layer (not shown) may be formed on the substrate <NUM> to absorb light between the inorganic LEDs 119a, 119b, and 119c. An encapsulation layer (not shown) may be formed on the substrate <NUM> to protect the inorganic LEDs 119a, 119b, and 119c. The encapsulation layer may be formed on the substrate <NUM> to cover the inorganic LEDs 119a, 119b, and 119c. The encapsulation layer may be formed of a resin such as epoxy or silicone, or Optically Clear Adhesive (OCA), or Optically Clear Resin (OCR). In order to physically protect the inorganic LEDs 119a, 119b, and 119c sufficiently, and at the same time, to improve image quality, the encapsulation layer may include a viscoelastic material in which viscoelasticity and curing degree change according to changes in temperature or pressure. The viscoelastic material may include at least one of ethylene-based, acetate-based, ethylene-vinyl acetate-based, olefin-based, and acrylic-based compounds.

The panel cover <NUM> configured to protect and support the plurality of display modules <NUM> may be attached to the front surface of the plurality of display modules <NUM>. The panel cover <NUM> may be formed by including glass. The plurality of display modules <NUM> are removably attached to the panel cover <NUM>. An adhesive layer <NUM> formed of a transparent material (refer to <FIG>) is arranged between the plurality of display modules <NUM> and the panel cover <NUM>. The adhesive layer <NUM> may be provided to easily separate the plurality of display modules <NUM> from the panel cover <NUM>.

The panel cover <NUM> may include an optical film <NUM> (refer to <FIG>) configured to improve optical performance. A circularly polarized film, a linearly polarized film, a phase difference film, an AG / LR / AR / HC film, a Neutral Density (ND) film, which are used to improve image quality, are used alone as the optical film <NUM> or alternatively, two or more films thereof may be laminated and then used as the optical film <NUM>.

Referring to <FIG>, one of the display modules <NUM> includes a module plate <NUM> arranged on a surface opposite to the mounting surface 111a of the substrate <NUM>. The module plate <NUM> may be manufactured in a thin film or sheet form, and then attached to the substrate <NUM> through an adhesive or heat dissipation tape. Between the substrate <NUM> and a module printed circuit board (PCB) <NUM> (hereinafter referred to as module PCB), the module plate <NUM> is arranged in a direction opposite to a direction in which the inorganic LEDs emit light.

The module plate <NUM> is formed by including a material having thermal conductivity for heat dissipation of a corresponding one of the display modules <NUM>. Further, the module plate <NUM> may be formed by including a material having a predetermined stiffness or more to reinforce the strength of a respective one of the display modules <NUM> so as to prevent damage. The module plate <NUM> may be provided to prevent light leakage caused by the substrate <NUM> formed of a semi-transparent material. The visibility of the display apparatus <NUM> may be improved by the module plate <NUM>. The module plate <NUM> may be formed by including aluminum (Al).

The module plate <NUM> forms a boss mounting portion <NUM> on the substrate <NUM> when the module plate <NUM> is attached to the substrate <NUM>.

The module plate <NUM> may be formed to be thinner than the substrate <NUM>. In order to form the boss mounting portion <NUM>, the module plate <NUM> may include an edge portion <NUM> formed on the upper left and right sides of the module plate <NUM>. The edge portion <NUM> may be formed at a corner portion of the module plate <NUM>. When the module plate <NUM> is mounted on the substrate <NUM>, the boss mounting portion <NUM> may be exposed to face the frame <NUM> by the edge portion <NUM>.

A boss <NUM> (refer to <FIG>) may be removably mounted to the boss mounting portion <NUM>. The boss mounting portion <NUM> is positioned on the rear surface of the substrate <NUM>. The boss mounting portion <NUM> may be positioned on at least one corner of the substrate <NUM>. The boss mounting portion <NUM> may be formed to correspond to the shape and/or size of a fixer <NUM> (see <FIG>) of the boss <NUM>.

The boss <NUM> may be attached to one of the plurality of display modules <NUM> by the boss mounting portion <NUM>. When the display panel <NUM> is fixed to the frame <NUM> or when one display module is separated from other display modules of the plurality of display modules <NUM>, the boss <NUM> may be attached to the one display module of the plurality of display modules <NUM> corresponding to a separation target.

Each of the display modules <NUM> includes a respective module PCB <NUM>. One end 112a of the module PCB <NUM> is electrically connected to a surface opposite to the mounting surface 111a of the substrate <NUM>. An other end 112b of the module PCB <NUM> may be electrically connected to one of the panel boards <NUM>. The module PCB <NUM> may be provided as a flexible printed circuit board (FPCB). Through each module PCB <NUM>, each of the display modules <NUM> may respectively receive power and data for driving. The module PCB <NUM> may be provided in plural.

Referring to <FIG> and <FIG>, each of the panel boards <NUM> may include one or more of the connector 31a. It is illustrated that eight of the panel boards <NUM> are provided and each of the panel boards <NUM> include eight of the connector 31a in this embodiment, but the number of the panel boards <NUM> and the number of the connector 31a of the panel boards <NUM> are not limited thereto.

Each connector 31a may be electrically connected to a respective one of the display modules <NUM>. For example, eight of the display modules <NUM> may be electrically connected to one of the panel boards <NUM> via the eight of the connector 31a of the one of the panel boards <NUM>, respectively. Each connector 31a may be electrically connected to the module PCB <NUM> of a respective one of the display modules <NUM>.

A connection terminal 31aa may be provided in each connector 31a. The connection terminal 31aa may be electrically connected to the other end 112b of the module PCB <NUM>. Due to this configuration, the panel boards <NUM> may supply power or transmit data to the display modules <NUM>.

The panel boards <NUM> each may include a board connector 31b. A wire (not shown) or a PCB (not shown) extending from the device board <NUM> may be electrically connected to the board connector 31b. Each of the panel boards <NUM> may be electrically connected to the device board <NUM> by the respective board connector 31b. The panel boards <NUM> may receive power or data from the device board <NUM> by the respective board connector 31b.

The boss <NUM> is mounted on at least one of the plurality of display modules <NUM>. The boss <NUM> may be configured to be screwed to a fastening member <NUM> (see <FIG>). The boss <NUM> may include the fixer <NUM> fixed to one of the display modules <NUM> and a coupler <NUM> protruding from the fixer <NUM> and then coupled to the fastening member <NUM>. The coupler <NUM> may include a thread formed to be screwed to the fastening member <NUM>. In this embodiment, six of the boss <NUM> are provided, but the number of the boss <NUM> is not limited thereto. The fastening member <NUM> (e.g. a fastener) may include screws and bolts.

Referring to <FIG> and <FIG>, the boss <NUM> may be coupled to the fastening member <NUM> when the display panel <NUM> is mounted to the frame <NUM>. Particularly, for coupling the display panel <NUM> to the frame <NUM>, the boss <NUM> may be mounted on the display panel <NUM>, and a frame hole <NUM> may be formed on the frame <NUM>. When the display panel <NUM> is coupled to the frame <NUM>, the frame hole <NUM> of the frame <NUM> may be positioned to correspond to the boss <NUM> of the display panel <NUM>, and at this time, the fastening member <NUM> may be coupled to the frame hole <NUM> of the frame <NUM> and the boss <NUM>.

The display panel <NUM> may be fixed to the frame <NUM> by an adhesive member <NUM> and the fastening member <NUM>. The adhesive member <NUM> may fix the edge portion of the display panel <NUM> to the frame <NUM>, and the fastening member <NUM> may fix a part of an inside of the display panel <NUM> to the frame <NUM>.

Particularly, the boss <NUM> is positioned in the inside of the rear surface of the display panel <NUM>. The boss <NUM> may be mounted at any position inside the rear surface of the display panel <NUM>. A coupling force between the boss <NUM> and the fastening member <NUM> may be applied to a part of the inside of the display panel <NUM> and the frame <NUM>.

The adhesive member <NUM> may be provided to fix the edge portion of the display panel <NUM> and the frame <NUM> to each other. Together with the boss <NUM> and the fastening member <NUM>, the adhesive member <NUM> may provide a fixing force for fixing the display panel <NUM> to the frame <NUM>. The adhesive member <NUM> may extend along a rear edge of the display panel <NUM>. The adhesive member <NUM> may be arranged along an edge between the display panel <NUM> and the frame <NUM>. The adhesive member <NUM> may fix the edge portion of the display panel <NUM> to the edge portion of the frame <NUM>.

An insulating double-sided tape is used as the adhesive member <NUM>. Alternatively, an ultraviolet curing resin that is cured by ultraviolet rays may be used as the adhesive member <NUM>. However, the adhesive member <NUM> is not limited thereto and thus any material having appropriate adhesive strength such as a thermosetting resin cured by heat may be used as the adhesive member <NUM>.

The display panel <NUM> may be mounted and fixed to the frame <NUM> by the adhesive member <NUM> and the fastening member <NUM>. Therefore, when the display panel <NUM> is mounted to the frame <NUM>, the frame body <NUM> may cover the rear of the display panel <NUM> and the edge cover <NUM> may cover the edge of the display panel <NUM>. Because the display apparatus <NUM> includes the display panel <NUM> in which the plurality of display modules <NUM> is mounted on the panel cover <NUM>, a front chassis configured to support the plurality of display modules <NUM> may be omitted, which is different from the conventional method. That is, because the frame <NUM> supports the panel cover <NUM> configured to support the plurality of display modules <NUM>, the bezel may be minimized in the display apparatus <NUM> according to an embodiment of the disclosure. That is, the display apparatus <NUM> according to an embodiment of the disclosure may be implemented as a bezel-less display apparatus.

In addition, the boss mounting portion <NUM>, on which the boss <NUM> is mounted, is formed on one or more of the display modules <NUM> and a thickness of a part of the one or more of the display modules <NUM>, in which the boss mounting portion <NUM> is formed, may be less than a thickness of other parts. Therefore, although the boss <NUM> configured to mount the display panel <NUM> to the frame <NUM> is mounted on the one or more of the display modules <NUM>, the thickness of the display apparatus <NUM> may become relatively small.

<FIG> are views sequentially illustrating a process for replacing one display module among the plurality of display modules <NUM> of <FIG>.

A process of separating a display module 110a from the plurality of display modules <NUM> will be described with reference to <FIG>. The display apparatus <NUM> according to an embodiment of the disclosure is configured to easily replace a display module 110a among the plurality of display modules <NUM> when the display module 110a needs to be replaced.

Particularly, referring to <FIG>, when a defect occurs in the display module 110a among the plurality of display modules <NUM> and replacement is needed, an operator may first separate the rear cover <NUM> and the device board <NUM> of the display apparatus <NUM>.

After separating the rear cover <NUM> from the frame <NUM> and separating the device board <NUM> connected to the panel boards <NUM>, the operator may separate the fastening member <NUM> from the boss <NUM> to separate the frame <NUM> from the display panel <NUM>. After separating the frame <NUM> from the display panel <NUM>, the operator may separate the panel board (e.g. one of the panel boards <NUM>) connected to the display module 110a that needs to be replaced. The operator may separate the module PCB <NUM> of the display modules <NUM> and the connection terminal 31aa of each connector 31a connected to the panel board.

Referring to <FIG>, the operator may mount a boss 120a, for separation of the display module 110a, to a boss mounting portion 115a of the display module 110a that needs to be replaced. Not only when the operator intends to mount the display panel <NUM> to the frame <NUM>, but also when the operator intends to separate the display module 110a from the plurality of display modules <NUM>, the boss <NUM> and/or the boss 120a of the display apparatus <NUM> according to an embodiment of the disclosure may be mounted to the display module (e.g. display module 110a) that needs to be replaced. According to an embodiment, the boss 120a may have a same or similar configuration as the boss <NUM>.

Particularly, when the display module 110a that needs to be replaced is a display module to which the boss <NUM> for coupling the display panel <NUM> to the frame <NUM> is not mounted, the operator may mount the boss 120a, for separation of the display module 110a, to the display module 110a that needs to be replaced. That is, the boss 120a may be mounted as an additional boss of the display panel <NUM>.

On the other hand, when a display module 110b that needs to be replaced is a display module to which the boss <NUM> for coupling the display panel <NUM> to the frame <NUM> is already mounted, the operator may not need to couple the boss 120a, for separation of the display module 110b, to the display module 110b that needs to be replaced. That is, an additional boss may not be needed to be coupled to the display module 110b.

Referring to <FIG>, the operator may couple a fastening member 136a, for separation, to the boss 120a mounted on the display module 110a that needs to be replaced. By applying a force to the fastening member 136a for separation, the operator can separate the display module 110a, which needs to be replaced, from the panel cover <NUM>. The fastening member 136a for separation may be provided in the same manner as the fastening member <NUM> used for fixing the display panel <NUM> to the frame <NUM>. In an embodiment, the fastening member 136a may have a same or similar structure as the fastening member <NUM>. In an embodiment, the force applied to the fastening member 136a for separation may be a force applied in a rearward direction towards a rear of the display module 110a. For example, the force may cause the fastening member 136a to pull the display module 110a away from other display modules of the plurality of display modules <NUM> in the rearward direction. In an embodiment, the force may be applied to the fastening member 136a by a hand or a tool that pulls the fastening member 136a in the rearward direction.

In at least one of the display modules <NUM> (e.g. display module 110a) according to an embodiment of the disclosure, the boss mounting portion <NUM>, to which the boss <NUM> or boss 120a is mounted, is formed at a corner portion, and accordingly, a force, which is to separate the display module 110a from the panel cover <NUM>, is applied to the corner portion of the display module 110a that needs to be replaced. Therefore, by using a relative small amount of force, it is possible to separate the display module 110a that needs to be replaced. That is, the display module 110a that needs to be replaced may start to be separated from the corner portion thereof.

Although not shown, when the display module that needs to be replaced is the display module 110b to which the boss <NUM> is already mounted, the operator may re-couple the fastening member <NUM> to the boss <NUM> in a state in which the panel board (e.g. one of the panel boards <NUM>) is separated from the display module 110b, and then the operator may separate the display module 110b, which needs to be replaced, from the panel cover <NUM> by applying the force to the fastening member <NUM> for separation. In an embodiment, the force applied to the fastening member <NUM> for separation may be a force applied in a rearward direction towards a rear of the display module 110b. For example, the force may cause the fastening member <NUM> to pull the display module 110b away from other display modules of the plurality of display modules <NUM> in the rearward direction. In an embodiment, the force may be applied to the fastening member <NUM> by a hand or a tool that pulls the fastening member <NUM> in the rearward direction.

As is apparent from the above description, because the plurality of display modules is attached to a single panel cover with the adhesive, a separate bezel for assembling and/or mounting the plurality of display modules may be omitted.

Because the plurality of display modules is attached to a single panel cover, thereby implementing the integration of the display panel, it is possible to minimize a step and/or a gap among the plurality of display modules.

Because the boss mounting portion is provided in the display module, it is possible to easily replace a single display module among the plurality of display modules.

As a single unit, the display module may be installed and applied to wearable devices, portable devices, handheld devices, and electronic products or electronic devices that need a display. Further, the plurality of display modules may be assembled in a matrix type and then applied to a display apparatus such as a PC monitor, a high definition TV, a digital signage, and an electronic display.

Claim 1:
A display module (<NUM>) comprising:
a substrate (<NUM>);
a plurality of inorganic light emitting diodes (119a, 119b, 119c) mounted on a mounting surface of the substrate;
a module plate (<NUM>) attached to a surface opposite to the mounting surface of the substrate;
a boss mounting portion (<NUM>) formed by the module plate (<NUM>) mounted on the substrate of the display module and positioned on the surface opposite to the mounting surface of the substrate (<NUM>); and
a module Printed Circuit Board, PCB, (<NUM>) electrically connected to the surface opposite to the mounting surface of the substrate (<NUM>),
characterized in that
the module plate (<NUM>) comprises an edge that exposes the boss mounting portion (<NUM>),
a thickness of a first part of the display module (<NUM>), in which the boss mounting portion (<NUM>) is formed, is less than a thickness of a second part of the display module (<NUM>), in which the module plate (<NUM>) is arranged.
the module plate (<NUM>) is arranged between the substrate (<NUM>) and the module PCB (<NUM>), and
the module plate (<NUM>) comprises a thermal conductive material having a thermal conductivity for heat dissipation corresponding to the display module.