Patent ID: 12249596

DETAILED DESCRIPTION

Various embodiments will be described in greater detail below with reference to the accompanied drawings. The embodiments described herein may be variously modified. Specific embodiments may be illustrated in the drawings and described in detail in the description. However, the specific embodiments described in the accompanied drawings are merely to assist in the understanding of the various embodiments. Accordingly, the various embodiments disclosed in the accompanied drawings are not for limiting the scope of the disclosure to a specific embodiment, and should be interpreted to include all modifications or alternatives included in the technical spirit and scope of the embodiments.

Terms including ordinal numbers such as first, second, and the like may be used to describe various elements, but these elements are not limited by the above-described terms. The above-described terms may be used only to distinguish one element from another element.

In the disclosure, it is to be understood that the terms such as “comprise,” “include,” or the like are used herein to designate a presence of a characteristic, number, step, operation, element, component, or a combination thereof, and not to preclude a presence or a possibility of adding one or more of other characteristics, numbers, steps, operations, elements, components or a combination thereof. When a certain element is indicated as being “coupled with/to” or “connected to” another element, it is to be understood that the certain element may be directly coupled to or connected to the another element, but that another element may be present therebetween. On the other hand, when a certain element is indicated as being “directly coupled with/to” or “directly connected to” another element, it is to be understood that another element is not present therebetween.

In the disclosure, the expression ‘same’ may not only mean fully matching, but also include a difference to a degree of taking into consideration a processing error range.

In addition thereto, in describing the disclosure, in case it is determined that the detailed description of related known technologies may unnecessarily obscure the gist of the disclosure, the detailed description thereof will be abridged or omitted.

A display module may be a display panel provided with a micro light-emitting diode (micro LED or μLED) for displaying an image. The display module may be one from among a flat panel display panel, each of which are configured with a plurality of inorganic LEDs of less than or equal to 100 micrometers and may provide better contrast, response time and energy efficiency than a liquid crystal display (LCD) panel which requires a backlight.

Both an OLED and a micro LED, which is an inorganic LED, have good energy efficiency, but the micro LED has a greater brightness, light-emitting efficiency, and life span than the OLED. The micro LED may be a semiconductor chip capable of emitting light on its own when power is supplied. The micro LED may have a fast response rate, low power, and a high brightness. For example, the micro LED may have higher efficiency in converting electricity to photons compared to the LCD or the OLED. That is, a “brightness per watt” compared to the LCD or the OLED display of the related art is higher. Accordingly, the micro LED may be configured to have a same brightness with an energy of about half compared to the LED (e.g., width, length and height respectively exceeding 100 mm) or the OLED. In addition to the above, the micro LED may provide a high resolution, a superior color, shading and brightness, express color of a wide range accurately, and provide a screen that is clear even in the outdoors where sunlight is bright. Further, the micro LED may be guaranteed a long life span because it is strong against a burn in phenomenon and there is no deformation due to little heat being generated. The micro LED may have a flip chip structure in which an anode electrode and a cathode electrode are formed at a same first surface and a light-emitting surface is formed at a second surface positioned at an opposite side of the first surface at which the electrodes are formed.

In the disclosure, a substrate may be disposed with a thin film transistor (TFT) layer on which a TFT circuit is formed at a front surface, and disposed with a timing controller configured to control a power supply circuit and a data driving driver configured to supply power to the TFT circuit at a rear surface, a gate driving driver and respective driving drivers at the rear surface. Multiple pixels arranged on the TFT layer may be driven by the TFT circuit.

In the disclosure, a glass substrate, a synthetic resin-based (e.g., polyimide (PI), polyethylene terephthalate (PET), polyethersulfone (PES), polyethylene naphthalate (PEN), polycarbonate (PC), etc.) substrate having a flexible material, or a ceramic substrate may be used for the substrate.

The TFT layer on which the TFT circuit is formed may be disposed at the front surface of the substrate, and circuits may not be disposed at the rear surface of the substrate. The TFT layer may be formed integrally on the substrate or adhered to one surface of the glass substrate manufactured in a separate film form.

The front surface of the substrate may be divided into an active area and a dummy area. The active area may correspond to an area occupied by the TFT layer at the front surface of the substrate, and the dummy area may be an area excluding the area occupied by the TFT layer at the front surface of the substrate.

An edge area of the substrate may be an outermost side area of the glass substrate. In addition, the edge area of the substrate may be a remaining area excluding an area at which a circuit of the substrate is formed. In addition, the edge area of the substrate may include a part of the front surface of the substrate which is adjacent to a side surface of the substrate and a part of the rear surface of the substrate which is adjacent to the side surface of the substrate. The substrate may be formed as a quadrangle type. Specifically, the substrate may be formed as a rectangle type or a square type. The edge area of the substrate may include at least one side from among the four sides of the glass substrate.

The TFT comprising the TFT layer (or backplane) is not limited to a specific structure or type. For example, the TFT referred in the disclosure may be realized with an oxide TFT and an Si TFT (poly silicon, a-silicon), an organic TFT, a graphene TFT, and the like in addition to a low-temperature polycrystalline silicon TFT (LTPS TFT), and may be applied by making only a P type (or N type) metal-oxide-semiconductor field-effect transistor (MOSFET) in a Si wafer complementary metal-oxide-semiconductor (CMOS) process.

A pixel driving method of the display module may be an active matrix (AM) driving method or a passive matrix (PM) driving method. The display module may be configured to form a wiring pattern to which the respective micro LEDs are electrically connected according to the AM driving method or the PM driving method.

A one pixel area may be disposed with a plurality of pulse amplitude modulation (PAM) control circuits. In this case, respective sub pixels disposed at the one pixel area may be controlled by the corresponding PAM control circuits. In addition, the one pixel area may be disposed with a plurality of pulse width modulation (PWM) control circuits. In this case, the respective sub pixels disposed at the one pixel area may be controlled by the corresponding PWM control circuits.

The one pixel area may be disposed with both the plurality of PAM control circuits and the plurality of PWM control circuits. In this case, some from among the sub pixels disposed at the one pixel area may be controlled by the PAM control circuit and the remaining may be controlled through the PWM control circuit. In addition, the respective sub pixels may be controlled by the PAM control circuit and the PWM control circuit.

The display module may include multiple side surface wirings of a thin film thickness disposed at a certain distance along the side surface of the TFT substrate.

The display module may include multiple through wiring members formed so as to not be exposed toward the side surface of the TFT substrate in place of the side surface wiring exposed toward the side surface of the TFT substrate. Accordingly, by minimizing the dummy area and maximizing the active area at the front surface of the TFT substrate, the bezel may be made bezel-less, and a mounting density of the micro LEDs with respect to the display module may be increased.

Based on coupling multiple display modules providing a bezel-less form, a large size multi display device capable of maximizing the active area may be provided when coupling the multiple display apparatus. In this case, the respective display modules may be formed to maintain a pitch between the respective pixels of the display module adjacent to one another to be the same as a pitch between the respective pixels in a signal display module based on to minimizing the dummy area. Accordingly, this may be one method for a seam to be not visible at a coupling part between the respective display modules.

A display part having a large screen size may be formed by connecting the multiple display modules, and a polarizing member may be disposed at a front of the display part to reduce boundary visibility, wherein the seam is made visible at a boundary of the respective display modules, and to reduce external light reflectivity. The polarizing member may include, for example, a transparent glass and a circular polarizing layer stacked at the front surface of the transparent glass. In this case, the polarizing member may be formed with an air layer of a predetermined thickness between the display part and the polarizing member according to being disposed spaced apart at the front of the display part.

A driving circuit may be realized by a micro integrated circuit (IC) configured to control the driving of at least 2n pixels disposed at the pixel area. Based on applying the micro IC to the display module, rather than the TFT, only a channel layer connecting the micro IC with the respective micro LEDs may be formed at the TFT layer (or backplane).

The display module may be installed, as a single unit, in a wearable device, a portable device, a handheld device, and an electronic product requiring various displays or applied in an electric field, and may be applied to a display device such as, for example, and without limitation, a monitor for a personal computer, a high resolution television (TV) and signage (or, digital signage), an electronic display, or the like through a plurality of assemblies as a matrix type.

The display module according to an embodiment will be described below with reference to the accompanied drawing.

FIG.1is a diagram illustrating a display device according to an embodiment.FIG.2is a diagram illustrating an example of disposing a display part in which multiple display modules are connected and an external light reflection preventing member at a front thereof according to an embodiment.FIG.3is a diagram illustrating part III shown inFIG.1according to an embodiment.

Referring toFIG.1andFIG.2, the display device1may include a display part100configured to couple the multiple display modules10to provide a large size screen, and a polarizing member90disposed spaced apart by a predetermined distance at the front of the display part100.

The display part100may be formed by using multiple display modules10having a certain size and continuously coupling in a row direction and a column direction. In this case, the display modules adjacent to one another may be physically and electrically coupled.

The display part100may form a square type having a same width and length ratio or a rectangle type having a different width and length ratio according to the form of arranging the multiple display modules10. The width and length size of the polarizing member90may correspond to the width and length size of the corresponding display part100.

The polarizing member90may be disposed at the front of the display part to reduce boundary visibility, where the seam is made visible at a boundary of the respective display modules, and to reduce external light reflectivity.

Referring toFIG.3, the polarizing member90may be formed roughly in a plate form, and may include a transparent glass substrate91and a circular polarizing layer93stacked at one surface of the glass substrate91.

The circular polarizing layer93may reduce, based on having a black based color, boundary visibility, where the seam is made visible at a boundary of the respective display modules, and to reduce reflectivity by absorbing external light.

The polarizing member90may be disposed to be spaced apart at a predetermined distance at the front of the display part100. Accordingly, an air layer80of a predetermined thickness may be formed between the polarizing member90and the display part100.

The polarizing member90may be supported by a bezel member7surrounding an outer part of the display part100. Accordingly, the polarizing member90may be disposed to be spaced apart at a predetermined distance from the display part100.

Although not illustrated in the drawings, the bezel member7may be omitted from the display device1. In this case, the polarizing member90may be disposed to be spaced apart from the display part100through various support structures. For example, in order to dispose the polarizing member90to be spaced apart from the display part100, multiple spacers may be disposed between the polarizing member90and the display part100. In this case, it may be preferable for the spacer to have transparency to a degree the emission amount of the micro LED is not reduced and be disposed at a point where it does not have an effect on or has a minimal effect on emission.

As described above, by forming the air layer80between the polarizing member90and the display part100, issues that may occur with respect to the reflectivity and thickness of the display module10may be resolved.

For example, based on stacking a layer (i.e., uneven layer) on which multiple uneven areas are formed at the front surface of the display module10to resolve moire from being visible from the side surface of the display device1, reduction in visibility may be apparent due to an increase in reflectivity by the uneven areas. In addition, based on stacking so as to contact a polarizing layer to the front surface of the display module10, the thickness of the display module10may be increased, and thereby the amount of light lost at an end part of the display module10may be increased and a color seam of a color displayed at the end part of the display module10not being represented to a desired color may appear.

Based on spacing apart the polarizing member90from the front surface of the display part100by the thickness of the air layer80, the thickness of the display module10may be prevented from increasing by the polarizing member90and the above-described relevant problems may be fundamentally resolved.

FIG.4is a diagram illustrating one display module according to an embodiment.

Referring toFIG.4, the display module10may include a TFT substrate20and multiple micro LEDs51,52and53arranged on the TFT substrate20.

The TFT substrate20may include a glass substrate and a TFT layer included with a TFT circuit at the front surface of the glass substrate. In addition, the TFT substrate20may be disposed at a rear surface of the glass substrate and include multiple side surface wirings15electrically coupling a circuit configured to supply power to the TFT circuit and electrically coupled with a separate control substrate, and the TFT circuit.

The TFT substrate20may include an active area20arepresenting an image and a dummy area20bincapable of representing an image at the front surface.

The active area20amay be divided into multiple pixel areas at which multiple pixels are respectively arranged. The multiple pixel areas may be divided into various forms, and as an example, may be divided into a matrix form as inFIG.4. The respective pixel areas may include a sub pixel area in which multiple sub pixels are mounted, and a pixel circuit area in which a pixel circuit for driving the respective sub pixels is disposed.

The multiple micro LEDs51,52and53may be light-emitting devices for displaying an image. The multiple micro LEDs51,52and53may be transferred to the pixel circuit area of the TFT layer, and electrode pads of the respective micro LEDs may be electrically coupled to substrate electrode pads21,22and23(FIG.3) formed at the sub pixel area of the TFT layer, respectively. A common electrode pad may be formed in a straight-line form considering the arrangement of at least three micro LEDs51,52and53positioned at the respective pixels areas. The multiple micro LEDs may be a sub pixels forming a single pixel. In the disclosure, one micro LED may refer to one sub pixel, and the relevant terms may be used interchangeably.

Three red, green and blue micro LEDs51,52and53have been described as forming one pixel, but the embodiment is not limited thereto, and any number of micro LEDs may form one pixel.

The pixel driving method of the display module10according to an embodiment may be the AM driving method or the PM driving method. The display module10may be configured to form a wiring pattern to which respective micro LEDs are electrically coupled according to the AM driving method or the PM driving method.

The dummy area20bmay be included in the edge area of the glass substrate. For example, the edge area of the disclosure may be an area in which multiple side surface wirings15are formed, and may include a part of the front surface of the TFT substrate20adjacent to the side surface20cof the TFT substrate20and a part of the rear surface of the TFT substrate20adjacent to the side surface20cof the TFT substrate20.

Referring toFIG.3, the display module10may be formed with multiple substrate electrode pads21,22and23at the front surface of the TFT substrate20. The multiple substrate electrode pads21,22and23may be electrically connected with multiple micro LEDs51,52and53. Accordingly, the multiple micro LEDs51,52and53may be coupled with the TFT circuit of the TFT layer through the multiple substrate electrode pads21,22and23.

The display module10has been described as including the TFT substrate20, but is not limited thereto, and may apply a substrate with no TFT layer that includes the TFT circuit. In this case, the driving circuit disposed to the rear surface of the TFT substrate20may be realized by a micro integrated circuit (IC) which controls the driving of at least 2n pixels disposed at the pixel area. Based on applying the micro IC to the display module10as described above, only the channel layer connecting the micro IC with the respective micro LEDs may be formed in place of the TFT on the TFT layer.

The display module10may be configured such that an insulating layer30, an adhesive layer40, a filling layer60, and a molding layer70is sequentially stacked at the front surface of the TFT substrate20. The respective layers stacked at the front surface of the TFT substrate20will be described below with reference toFIG.3.

The insulating layer30may be stacked at the front surface of the TFT substrate20to protect the TFT circuit of the TFT substrate20and prevent short circuiting between adjacent wirings. In this case, the substrate electrode pads21,22and23which require an electrical connection with the micro LEDs51,52and53may not be covered by the insulating layer30. The insulating layer30may be formed by applying, for example, a photo-imageable solder resist (PSR) ink.

The adhesive layer40may be formed stacked at the front surface of the TFT substrate20to fix the multiple micro LEDs51,52and53to the TFT substrate20. In this case, the adhesive layer40may be stacked at the front surface of the TFT substrate20to cover the whole front surface of the TFT substrate20for convenience of process.

The adhesive layer40may be an anisotropic conductive film (ACF) or a non-conductive film (NCF).

When using the ACF as the adhesive layer40, to prevent the manufacturing cost of the whole display device from rising due to the high material cost of the ACF, a conductive ink including multiple nano-conductive particles may be used to form the adhesive layer40. In this case, the adhesive layer40may be stacked selectively only at the substrate electrode pads21,22and23and a surrounding area of the substrate electrode pads21,22and23from the whole front surface area of the TFT substrate20.

The respective micro LEDs may have a flip chip structure in which an anode electrode and a cathode electrode are formed at the same first surface S1and the light-emitting surface is formed at the second surface S2positioned at the opposite side of the first surface S1at which the electrodes are formed.

The multiple micro LEDs51,52and53may be electrically coupled to the corresponding substrate electrode pads21,22and23through a thermal compression process after being transferred to the TFT substrate20, and may be stably fixed to the TFT substrate20by the adhesive layer40.

The filling layer60may be stacked at the front surface of the TFT substrate20, and may cover the whole front surface of the TFT substrate20excluding a light-emitting surface S2of the multiple micro LEDs51,52and53.

The filling layer60may be formed of an insulating material, and may absorb light diverged from the side surface and back surface S1of the multiple micro LEDs51,52and53based on having a black-based color and prevent a cross talk phenomenon between the adjacent micro LEDs. Accordingly, there may be no need for the display module10to form a separate black matrix because the filling layer60is able to perform the black matrix role.

The molding layer70may cover the filling layer60and the light-emitting surface S2of the multiple micro LEDs51,52and53. The molding layer70may be a transparent resin and may be formed by an ultraviolet (UV) curable molding method.

The molding layer70may be formed with an uneven portion71at the whole surface. The uneven portion71may prevent moire from becoming visible when viewing the screen of the display device1obliquely from the side surface.

The uneven portion71may include multiple unevenness disposed irregularly by processing imprinting of the surface of the molding layer70. Accordingly, based on the uneven portion71being formed integrally with the molding layer70without being stacked as a separate layer to the molding layer70, the thickness of the display module10may be prevented from increasing. Accordingly, the color seam may be prevented from becoming visible at the end part of the display module10due to the thickness of the display module10increasing.

Because the polarizing member90is disposed to be spaced apart by a predetermined distance at the front of the display part100, the thickness of the display module10is not increased by the polarizing member90. Accordingly, in the disclosure, when an anti-glare (AG) film of a thin film is stacked at the molding layer70in place of the uneven portion71, the thickness increase of the display module10may be minimized and moire may be prevented from becoming visible. In addition, an optical film formed with fine unevenness may be formed laminating the molding layer70through a pressure sensitive adhesive (PSA) in place of the uneven portion71.

A manufacturing process of the display device1according to an embodiment of the disclosure will be described below with reference toFIG.5toFIG.13.

FIG.5is a flowchart of a method of manufacturing a display device according to an embodiment.FIG.6is a cross-sectional view illustrating an example of a thin film transistor (TFT) substrate on which an insulating layer is formed at a front surface according to an embodiment.

Referring toFIG.6, the insulating layer30may be formed on the glass substrate and the TFT substrate20on which the TFT layer is formed on the glass substrate.

The multiple substrate electrode pads21,22and23to which micro LEDs51,52and53transferred to the TFT substrate are respectively connected may be arranged at the front surface of the TFT substrate20.

The insulating layer30may cover the remaining area excluding the area in which the multiple substrate electrode pads21,22and23are disposed from among the whole front surface area of the TFT substrate20.

The insulating layer30may be formed at the front surface of the TFT substrate20by sequentially proceeding with an exposure and curing process after applying the insulating material, for example, the PSR ink.

FIG.7is a diagram illustrating an example of laminating an adhesive layer to a TFT substrate according to an embodiment.

Referring toFIG.7, the adhesive layer40may be attached to the front surface of the TFT substrate20through a laminating method. The ACF or the NCF may be used as the adhesive layer40.

The adhesive layer40may be selectively stacked only to a desired area and not attached to the whole front surface area of the TFT substrate20. In this case, the adhesive layer40may be formed by using the conductive ink including the multiple nano-conductive particles.

As described above, when forming the adhesive layer40with the conductive ink, the adhesive layer40may be stacked by spraying the conductive ink selectively only at the substrate electrode pads21,22and23and the surrounding areas of the substrate electrode pads21,22and23from the whole front surface area of the TFT substrate20.

FIG.8is a diagram illustrating an example of transferring multiple micro LEDs to a TFT substrate according to an embodiment.

Referring toFIG.8, in operation S11(FIG.5), the multiple micro LEDs51,52and53may be transferred to the TFT substrate20.

The multiple micro LEDs grown from an epi-substrate may be separated from the epi-substrate through a laser lift-off (LLO) method and arranged on a relay substrate. The micro LEDs adjacent to one another which are arranged on the relay substrate may maintain a first chip pitch in an X-axis direction (or, row direction) and maintain a second chip pitch in a Y-axis direction (or, column direction)

The multiple micro LEDs51,52and53transported to the relay substrate may be transferred to the TFT substrate20through a transfer process such as, for example, a laser transfer method, a rollable transfer method, and a pick and place transfer method.

When transferring to the TFT substrate20, the multiple micro LEDs51,52and53may be transferred to the TFT substrate20in a chip pitch different from the respective first and second chip pitches on the relay substrate.

The multiple micro LEDs51,52and53transferred to the TFT substrate20may be disposed at the corresponding substrate electrode pads21,22and23, respectively. In this state, the multiple micro LEDs51,52and53may be thermally compressed toward the TFT substrate20side by using a pressing member. In this case, a die supporting the TFT substrate20and the pressing member may be respectively installed with a heater (e.g., sheath heater, etc.).

Based on a part of the adhesive layer40(e.g., part positioned between the multiple micro LEDs and the substrate electrode pads) being melted by heat generated when performing the thermal compression, the multiple micro LEDs51,52and53may be stably fixed physically to the respective substrate electrode pads21,22and23of the TFT substrate20. In this case, the multiple micro LEDs51,52and53may contact the electrode pads21,22and23by a pressing force by the pressing member and be electrically coupled.

FIG.9is a diagram illustrating an example of a filling layer being stacked at a front surface of a TFT substrate which excludes a light-emitting surface of multiple micro LEDs according to an embodiment.

Referring toFIG.9, in operation S12(FIG.5), a filling layer may be formed by applying an insulating material capable of absorbing light at the front surface of the TFT substrate20to which multiple micro LEDs51,52and53are transferred.

The filling layer60may be formed in a black-based color so that light absorption is possible. The filling layer60may be applied to cover the whole front surface of the TFT substrate20excluding the light-emitting surface S2of the multiple micro LEDs51,52and53.

The thickness of the filling layer60may have a thickness roughly corresponding to the thickness from the surface (e.g., the boundary of the adhesive layer40and the filling layer60) of the adhesive layer40to the light-emitting surface S2of the multiple micro LEDs51,52and53.

In this case, the filling layer60may, based on being formed to surround the side surfaces of the multiple micro LEDs51,52and53in all directions, absorb light being diverged from the back surface S1of the multiple micro LEDs51,52and53and prevent the cross talk phenomenon from occurring between the adjacent micro LEDs. As described above, the filling layer60may perform the black matrix role.

FIG.10is a diagram illustrating an example of stacking a molding layer to cover a filling layer and a light-emitting surface of multiple micro LEDs according to an embodiment.FIG.11is a diagram illustrating an example of forming an uneven portion at a surface of a molding layer according to an embodiment.

Referring toFIG.10, in operation S13(FIG.5), a molding layer70may be stacked at the whole front surface area of the TFT substrate20.

The molding layer70may be formed through the UV curing molding in which a resin having a transparency to a degree the light diverged from the light-emitting surface of the multiple micro LEDs51,52and53satisfies the amount of light required covers the filling layer60and the light-emitting surface of the multiple micro LEDs51,52and53.

Referring toFIG.11, in operation S14(FIG.5), the surface of the molding layer70may be imprinting processed and an uneven portion71including the multiple unevenness arranged irregularly at the whole surface of the molding layer70may be formed.

Based on the uneven portion71being formed by processing the surface of the molding layer70, the thickness of the display module10may not be increased. The uneven portion71may be formed with respect to the whole surface area of the molding layer70.

Based on forming the uneven portion71at the surface of the molding layer70as described above, moire may be prevented from becoming visible when a viewer views the screen of the display device1obliquely from the side surface of the display device1from an oblique direction.

Based on stacking the AG film of the thin film at the molding layer70in place of the uneven portion71, the thickness increase of the display module10may be minimized and moire may be prevented from becoming visible. In addition, the optical film formed with fine unevenness may be formed laminating the molding layer70through the PSA in place of the uneven portion71.

FIG.12is a diagram illustrating a display part that couples multiple display modules to form a large screen size according to an embodiment.FIG.13is a diagram illustrating an example of an air layer being formed between a display part and an external light reducing member by disposing a polarizing member at a front surface of a display part at a predetermined distance according to an embodiment.

Referring toFIG.12, the display module10formed through the sequential process described above may form the display part100by continuously coupling multiple in a row direction and a column direction.

Referring toFIG.13, in operation S15(FIG.5), the front of the display part100may be disposed with the polarizing member90spaced apart at a pre-set distance.

The polarizing member90may prevent the boundary between the display modules10coupled with one another by the circular polarizing layer93having a black-based color from becoming visible, and reduce external light reflectivity.

The polarizing member90may maintain a spacing distance by the bezel member7(FIG.1) disposed at the outer part of the display part100. In this case, the air layer80may be formed between the polarizing member90and the display part100. Accordingly, the molding layer70and the polarizing member90of the respective display modules10may not be optically adhered to one another.

The light diverged from the multiple micro LEDs arranged at the respective display modules10of the display part100may not refracted as it passes the air layer80and may be wholly irradiated to the outside of the display device1through the polarizing member90.

As described above, based on the polarizing member90being disposed to be spaced apart so as to place an air gap with respect to the respective display parts100, the thickness of the display module10may not be increased. Accordingly, the problems described above according to the thickness increase of the display module10may be fundamentally blocked.

The display device1may be configured such that the bezel member7is omitted, and in this case, it may be possible to dispose the polarizing member90to be spaced apart from the display part100through various support structures not illustrated in the drawings.

For example, a transparent spacer may be disposed between the polarizing member90and the display part100. In this case, it may be preferable for the spacer to be formed of a material having a transparency which does not reduce the emission amount of the micro LED, and minimize loss or reflection of light. In addition, it may be preferable for the spacer to be disposed at a point it does not have an effect on or minimize the emission amount of the micro LEDs.

FIG.14is a flowchart of a method of manufacturing a display device according to an embodiment.FIG.15is a diagram illustrating a part of a display module of a display device according to an embodiment.

A display device1aaccording to an embodiment of the disclosure may be mostly similar with the structure of the display device1described above and may apply the same reference numerals with respect to the same elements. The display device1amay be described below, but descriptions on the same elements as with the display device1described above may be omitted.

Referring toFIG.14, the display device1amay omit the adhesive layer40(FIG.3) of the display device1described above. In this case, the display device1amay include a soldering member41which may substitute the adhesive layer40. The soldering member41may be a solder ball or a micro bump.

The soldering member41may be patterned on the substrate electrode pads21,22and23through a reflow process. The multiple micro LEDs51,52and53may be electrically and physically coupled to the substrate electrode pads21,22and23by the soldering member41going through the thermal compression process after the transferring process.

The display device1amay omit, differently from the display device1described above, the filling layer60(FIG.3). In this case, the molding layer70may fill between the multiple micro LEDs51,52and53.

Referring toFIG.15, the display device1aaccording to an embodiment may be manufactured with a slightly different process from the display device1described above.

First, the insulating layer30may be formed at the remaining area excluding the area in which the multiple substrate electrode pads21,22and23are disposed from among the whole front surface area of the TFT substrate20.

The soldering member41may be applied on the respective substrate electrode pads21,22and23through the reflow process.

Then, in operation S21, the multiple micro LEDs51,52and53may be transferred to the TFT substrate20. The multiple micro LEDs51,52and53may be thermally compressed in this state toward the TFT substrate20side by using the pressing member. Accordingly, the multiple micro LEDs51,52and53may be stably fixed physically and electrically coupled to the respective substrate electrode pads21,22and23of the TFT substrate20as the soldering member41is melted by the heat generated when performing the thermal compression.

Then, in operation S23, the molding layer70may be stacked using the UV curing molding method at the whole front surface area of the TFT substrate20(S22), and form the uneven portion71including multiple unevenness arranged irregularly at the whole surface of the molding layer.

In this case it may be possible to perform the laminating process of the AG film of the thin film at the molding layer70in place of the uneven portion71.

In operation S24, after forming the display part100by continuously coupling the multiple display modules10formed through the process as described above in multiples in the row direction and the column direction, the polarizing member90may be disposed to be spaced apart at a pre-set distance at the front of the display part100.

The display device1aaccording to an embodiment described above may, like the display device1described above, not only reduce the boundary visibility of the display modules10adjacent to one another and the external light reflectivity, but also prevent moire from becoming visible from the side surface of the display device1a.

In the above, various embodiments of the disclosure have been described respectively and individually, but the respective embodiments may not necessarily be implemented on its own, and the configuration and operation of the respective embodiment may be implemented in combination with at least one other embodiment.

While the disclosure has been illustrated and described with reference to various example embodiments thereof, it will be understood that the various example embodiments are intended to be illustrative, not limiting. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the true spirit and full scope of the disclosure, including the appended claims and their equivalents.