Patent ID: 12232392

BEST MODE FOR DISCLOSURE

Reference will now be made in detail to embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts, and a redundant description thereof will be omitted. As used herein, the suffixes “module” and “unit” are added or used interchangeably to facilitate preparation of this specification, and are not intended to suggest distinct meanings or functions. In describing embodiments disclosed in this specification, relevant well-known technologies may not be described in detail in order to avoid obscuring the subject matter of the embodiments disclosed in this specification. In addition, it should be noted that the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and should not be construed as limiting the technical spirit disclosed in the present specification.

Furthermore, although the drawings are separately described for simplicity, embodiments implemented by combining two or more drawings are also within the scope of the present disclosure.

In addition, when an element such as a layer, a region, or a substrate is described as being “on” another element, it is to be understood that the element may be directly on the other element, or there may be an intermediate element between them.

The display device described herein conceptually includes all display devices that display information with a unit pixel or a set of unit pixels. Therefore, the term “display device” may be applied not only to finished products but also to parts. For example, a panel corresponding to a part of a digital TV also independently corresponds to the display device in the present specification. Such finished products include a mobile phone, a smartphone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation system, a slate PC, a tablet PC, an Ultrabook, a digital TV, a desktop computer, and the like.

However, it will be readily apparent to those skilled in the art that the configuration according to the embodiments described herein is also applicable to new products to be developed later as display devices.

In addition, the term “semiconductor light-emitting element” mentioned in this specification conceptually includes an LED, a micro LED, and the like, and may be used interchangeably therewith.

FIG.1is a conceptual view illustrating an embodiment of a display device using a semiconductor light emitting element according to the present disclosure.

As shown inFIG.1, information processed by a controller (not shown) of a display device100may be displayed using a flexible display.

The flexible display may include, for example, a display that can be warped, bent, twisted, folded, or rolled by external force.

Furthermore, the flexible display may be, for example, a display manufactured on a thin and flexible substrate that can be warped, bent, folded, or rolled like paper while maintaining the display characteristics of a conventional flat panel display.

When the flexible display remains in an unbent state (e.g., a state having an infinite radius of curvature) (hereinafter referred to as a first state), the display area of the flexible display forms a flat surface. When the display in the first sate is changed to a bent state (e.g., a state having a finite radius of curvature) (hereinafter referred to as a second state) by external force, the display area may be a curved surface. As shown inFIG.1, the information displayed in the second state may be visual information output on a curved surface. Such visual information may be implemented by independently controlling the light emission of subpixels arranged in a matrix form. The unit pixel may mean, for example, a minimum unit for implementing one color.

The unit pixel of the flexible display may be implemented by a semiconductor light emitting element. In the present disclosure, a light emitting diode (LED) is exemplified as a type of the semiconductor light emitting element configured to convert electric current into light. The LED may be formed in a small size, and may thus serve as a unit pixel even in the second state.

Hereinafter, a flexible display implemented using the LED will be described in more detail with reference to the drawings.

FIG.2is a partially enlarged view showing part A ofFIG.1.

FIGS.3A and3Bare cross-sectional views taken along lines B-B and C-C inFIG.2.

As shown inFIGS.2,3A and3B, the display device100using a passive matrix (PM) type semiconductor light emitting element is exemplified as the display device100using a semiconductor light emitting element. However, the examples described below are also applicable to an active matrix (AM) type semiconductor light emitting element.

The display device100may include a substrate110, a first electrode120, a conductive adhesive layer130, a second electrode140, and at least one semiconductor light emitting element150, as shown inFIG.2.

The substrate110may be a flexible substrate. For example, to implement a flexible display device, the substrate110may include glass or polyimide (PI). Any insulative and flexible material such as polyethylene naphthalate (PEN) or polyethylene terephthalate (PET) may be employed. In addition, the substrate110may be formed of either a transparent material or an opaque material.

The substrate110may be a wiring substrate on which the first electrode120is disposed. Thus, the first electrode120may be positioned on the substrate110.

As shown inFIG.3A, an insulating layer160may be disposed on the substrate110on which the first electrode120is positioned, and an auxiliary electrode170may be positioned on the insulating layer160. In this case, a stack in which the insulating layer160is laminated on the substrate110may be a single wiring substrate. More specifically, the insulating layer160may be formed of an insulative and flexible material such as PI, PET, or PEN, and may be integrated with the substrate110to form a single substrate.

The auxiliary electrode170, which is an electrode that electrically connects the first electrode120and the semiconductor light emitting element150, is positioned on the insulating layer160, and is disposed to correspond to the position of the first electrode120. For example, the auxiliary electrode170may have a dot shape and may be electrically connected to the first electrode120by an electrode hole171formed through the insulating layer160. The electrode hole171may be formed by filling a via hole with a conductive material.

As shown inFIG.2or3A, a conductive adhesive layer130may be formed on one surface of the insulating layer160, but embodiments of the present disclosure are not limited thereto. For example, a layer performing a specific function may be formed between the insulating layer160and the conductive adhesive layer130, or the conductive adhesive layer130may be disposed on the substrate110without the insulating layer160. In a structure in which the conductive adhesive layer130is disposed on the substrate110, the conductive adhesive layer130may serve as an insulating layer.

The conductive adhesive layer130may be a layer having adhesiveness and conductivity. For this purpose, a material having conductivity and a material having adhesiveness may be mixed in the conductive adhesive layer130. In addition, the conductive adhesive layer130may have ductility, thereby providing making the display device flexible.

As an example, the conductive adhesive layer130may be an anisotropic conductive film (ACF), an anisotropic conductive paste, a solution containing conductive particles, or the like. The conductive adhesive layer130may be configured as a layer that allows electrical interconnection in the direction of the Z-axis extending through the thickness, but is electrically insulative in the horizontal X-Y direction. Accordingly, the conductive adhesive layer130may be referred to as a Z-axis conductive layer (hereinafter, referred to simply as a “conductive adhesive layer”).

The ACF is a film in which an anisotropic conductive medium is mixed with an insulating base member. When the ACF is subjected to heat and pressure, only a specific portion thereof becomes conductive by the anisotropic conductive medium. Hereinafter, it will be described that heat and pressure are applied to the ACF. However, another method may be used to make the ACF partially conductive. The other method may be, for example, application of only one of the heat and pressure or UV curing.

In addition, the anisotropic conductive medium may be, for example, conductive balls or conductive particles. For example, the ACF may be a film in which conductive balls are mixed with an insulating base member. Thus, when heat and pressure are applied to the ACF, only a specific portion of the ACF is allowed to be conductive by the conductive balls. The ACF may contain a plurality of particles formed by coating the core of a conductive material with an insulating film made of a polymer material. In this case, as the insulating film is destroyed in a portion to which heat and pressure are applied, the portion is made to be conductive by the core. At this time, the cores may be deformed to form layers that contact each other in the thickness direction of the film. As a more specific example, heat and pressure are applied to the whole ACF, and an electrical connection in the Z-axis direction is partially formed by the height difference of a counterpart adhered by the ACF.

As another example, the ACF may contain a plurality of particles formed by coating an insulating core with a conductive material. In this case, as the conductive material is deformed (pressed) in a portion to which heat and pressure are applied, the portion is made to be conductive in the thickness direction of the film. As another example, the conductive material may be disposed through the insulating base member in the Z-axis direction to provide conductivity in the thickness direction of the film. In this case, the conductive material may have a pointed end.

The ACF may be a fixed array ACF in which conductive balls are inserted into one surface of the insulating base member. More specifically, the insulating base member may be formed of an adhesive material, and the conductive balls may be intensively disposed on the bottom portion of the insulating base member. Thus, when the base member is subjected to heat and pressure, it may be deformed together with the conductive balls, exhibiting conductivity in the vertical direction.

However, the present disclosure is not necessarily limited thereto, and the ACF may be formed by randomly mixing conductive balls in the insulating base member, or may be composed of a plurality of layers with conductive balls arranged on one of the layers (as a double-ACF).

The anisotropic conductive paste may be a combination of a paste and conductive balls, and may be a paste in which conductive balls are mixed with an insulating and adhesive base material. Also, the solution containing conductive particles may be a solution containing any conductive particles or nanoparticles.

Referring back toFIG.3A, the second electrode140is positioned on the insulating layer160and spaced apart from the auxiliary electrode170. That is, the conductive adhesive layer130is disposed on the insulating layer160having the auxiliary electrode170and the second electrode140positioned thereon.

After the conductive adhesive layer130is formed with the auxiliary electrode170and the second electrode140positioned on the insulating layer160, the semiconductor light emitting element150is connected thereto in a flip-chip form by applying heat and pressure. Thereby, the semiconductor light emitting element150is electrically connected to the first electrode120and the second electrode140.

FIG.4is a conceptual view illustrating the flip-chip type semiconductor light emitting element ofFIG.3.

Referring toFIG.4, the semiconductor light emitting element may be a flip chip-type light emitting device.

For example, the semiconductor light emitting element may include a p-type electrode156, a p-type semiconductor layer155on which the p-type electrode156is formed, an active layer154formed on the p-type semiconductor layer155, an n-type semiconductor layer153formed on the active layer154, and an n-type electrode152disposed on the n-type semiconductor layer153and horizontally spaced apart from the p-type electrode156. In this case, the p-type electrode156may be electrically connected to the auxiliary electrode170, which is shown inFIG.3, by the conductive adhesive layer130, and the n-type electrode152may be electrically connected to the second electrode140.

Referring back toFIGS.2,3A and3B, the auxiliary electrode170may be elongated in one direction. Thus, one auxiliary electrode may be electrically connected to the plurality of semiconductor light emitting elements150. For example, p-type electrodes of semiconductor light emitting elements on left and right sides of an auxiliary electrode may be electrically connected to one auxiliary electrode.

More specifically, the semiconductor light emitting element150may be press-fitted into the conductive adhesive layer130by heat and pressure. Thereby, only the portions of the semiconductor light emitting element150between the p-type electrode156and the auxiliary electrode170and between the n-type electrode152and the second electrode140may exhibit conductivity, and the other portions of the semiconductor light emitting element150do not exhibit conductivity as they are not press-fitted. In this way, the conductive adhesive layer130interconnects and electrically connects the semiconductor light emitting element150and the auxiliary electrode170and interconnects and electrically connects the semiconductor light emitting element150and the second electrode140.

The plurality of semiconductor light emitting elements150may constitute a light emitting device array, and a phosphor conversion layer180may be formed on the light emitting device array.

The light emitting device array may include a plurality of semiconductor light emitting elements having different luminance values. Each semiconductor light emitting element150may constitute a unit pixel and may be electrically connected to the first electrode120. For example, a plurality of first electrodes120may be provided, and the semiconductor light emitting elements may be arranged in, for example, several columns. The semiconductor light emitting elements in each column may be electrically connected to any one of the plurality of first electrodes.

In addition, since the semiconductor light emitting elements are connected in a flip-chip form, semiconductor light emitting elements grown on a transparent dielectric substrate may be used. The semiconductor light emitting elements may be, for example, nitride semiconductor light emitting elements. Since the semiconductor light emitting element150has excellent luminance, it may constitute an individual unit pixel even when it has a small size.

As shown inFIGS.3A and3B, a partition wall190may be formed between the semiconductor light emitting elements150. In this case, the partition wall190may serve to separate individual unit pixels from each other, and may be integrated with the conductive adhesive layer130. For example, by inserting the semiconductor light emitting element150into the ACF, the base member of the ACF may form the partition wall.

In addition, when the base member of the ACF is black, the partition wall190may have reflectance and increase contrast even without a separate black insulator.

As another example, a reflective partition wall may be separately provided as the partition wall190. In this case, the partition wall190may include a black or white insulator depending on the purpose of the display device. When a partition wall including a white insulator is used, reflectivity may be increased. When a partition wall including a black insulator is used, it may have reflectance and increase contrast.

The phosphor conversion layer180may be positioned on the outer surface of the semiconductor light emitting element150. For example, the semiconductor light emitting element150may be a blue semiconductor light emitting element that emits blue (B) light, and the phosphor conversion layer180may function to convert the blue (B) light into a color of a unit pixel. The phosphor conversion layer180may be a red phosphor181or a green phosphor182constituting an individual pixel.

That is, the red phosphor181capable of converting blue light into red (R) light may be laminated on a blue semiconductor light emitting element at a position of a unit pixel of red color, and the green phosphor182capable of converting blue light into green (G) light may be laminated on the blue semiconductor light emitting element at a position of a unit pixel of green color. Only the blue semiconductor light emitting element may be used alone in the portion constituting the unit pixel of blue color. In this case, unit pixels of red (R), green (G), and blue (B) may constitute one pixel. More specifically, a phosphor of one color may be laminated along each line of the first electrode120. Accordingly, one line on the first electrode120may be an electrode for controlling one color. That is, red (R), green (G), and blue (B) may be sequentially disposed along the second electrode140, thereby implementing a unit pixel.

However, embodiments of the present disclosure are not limited thereto. Unit pixels of red (R), green (G), and blue (B) may be implemented by combining the semiconductor light emitting element150and the quantum dot (QD) rather than using the phosphor.

Also, a black matrix191may be disposed between the phosphor conversion layers to improve contrast. That is, the black matrix191may improve contrast of light and darkness.

However, embodiments of the present disclosure are not limited thereto, and anther structure may be applied to implement blue, red, and green colors.

FIGS.5A to5Care conceptual views illustrating various examples of implementation of colors in relation to a flip-chip type semiconductor light emitting element.

Referring toFIG.5A, each semiconductor light emitting element may be implemented as a high-power light emitting device emitting light of various colors including blue by using gallium nitride (GaN) as a main material and adding indium (In) and/or aluminum (Al).

In this case, each semiconductor light emitting element may be a red, green, or blue semiconductor light emitting element to form a unit pixel (subpixel). For example, red, green, and blue semiconductor light emitting elements R, G, and B may be alternately disposed, and unit pixels of red, green, and blue may constitute one pixel by the red, green and blue semiconductor light emitting elements. Thereby, a full-color display may be implemented.

Referring toFIG.5B, the semiconductor light emitting element150amay include a white light emitting device W having a yellow phosphor conversion layer, which is provided for each device. In this case, in order to form a unit pixel, a red phosphor conversion layer181, a green phosphor conversion layer182, and a blue phosphor conversion layer183may be disposed on the white light emitting device W. In addition, a unit pixel may be formed using a color filter repeating red, green, and blue on the white light emitting device W.

Referring toFIG.5C, a red phosphor conversion layer181, a green phosphor conversion layer185, and a blue phosphor conversion layer183may be provided on an ultraviolet light emitting device. Not only visible light but also ultraviolet (UV) light may be used in the entire region of the semiconductor light emitting element. In an embodiment, UV may be used as an excitation source of the upper phosphor in the semiconductor light emitting element.

Referring back to this example, the semiconductor light emitting element is positioned on the conductive adhesive layer to constitute a unit pixel in the display device. Since the semiconductor light emitting element has excellent luminance, individual unit pixels may be configured despite even when the semiconductor light emitting element has a small size.

Regarding the size of such an individual semiconductor light emitting element, the length of each side of the device may be, for example, 80 μm or less, and the device may have a rectangular or square shape. When the semiconductor light emitting element has a rectangular shape, the size thereof may be less than or equal to 20 μm×80 μm.

In addition, even when a square semiconductor light emitting element having a side length of 10 μm is used as a unit pixel, sufficient brightness to form a display device may be obtained.

Therefore, for example, in case of a rectangular pixel having a unit pixel size of 600 μm×300 μm (i.e., one side by the other side), a distance of a semiconductor light emitting element becomes sufficiently long relatively.

Thus, in this case, it is able to implement a flexible display device having high image quality over HD image quality.

The above-described display device using the semiconductor light emitting element may be prepared by a new fabricating method. Such a fabricating method will be described with reference toFIG.6as follows.

FIG.6shows cross-sectional views of a method of fabricating a display device using a semiconductor light emitting element according to the present disclosure.

Referring toFIG.6, first of all, a conductive adhesive layer130is formed on an insulating layer160located between an auxiliary electrode170and a second electrode140. The insulating layer160is tacked on a wiring substrate110. On the wiring substrate110, a first electrode120, the auxiliary electrode170and the second electrode140are disposed. In this case, the first electrode120and the second electrode140may be disposed in mutually orthogonal directions, respectively. In order to implement a flexible display device, the wiring substrate110and the insulating layer160may include glass or polyimide (PI) each.

For example, the conductive adhesive layer130may be implemented by an anisotropic conductive film. To this end, an anisotropic conductive film may be coated on the substrate on which the insulating layer160is located.

Subsequently, a temporary substrate112, on which a plurality of semiconductor light emitting elements150configuring individual pixels are located to correspond to locations of the auxiliary electrode170and the second electrodes140, is disposed in a manner that the semiconductor light emitting element150confronts the auxiliary electrode170and the second electrode140.

In this regard, the temporary substrate112is a growing substrate for growing the semiconductor light emitting element150and may include a sapphire or silicon substrate.

The semiconductor light emitting element is configured to have a space and size for configuring a display device when formed in unit of wafer, thereby being effectively used for the display device.

Subsequently, the wiring substrate110and the temporary substrate112are thermally compressed together. By the thermocompression, the wiring substrate110and the temporary substrate112are bonded together. Owing to the property of an anisotropic conductive film having conductivity by thermocompression, only a portion among the semiconductor light emitting element150, the auxiliary electrode170and the second electrode140has conductivity, via which the electrodes and the semiconductor light emitting element150may be connected electrically. In this case, the semiconductor light emitting element150is inserted into the anisotropic conductive film, by which a partition may be formed between the semiconductor light emitting elements150.

Then the temporary substrate112is removed. For example, the temporary substrate112may be removed using Laser Lift-Off (LLO) or Chemical Lift-Off (CLO).

Finally, by removing the temporary substrate112, the semiconductor light emitting elements150exposed externally. If necessary, the wiring substrate110to which the semiconductor light emitting elements150are coupled may be coated with silicon oxide (SiOx) or the like to form a transparent insulating layer (not shown).

In addition, a step of forming a phosphor layer on one side of the semiconductor light emitting element150may be further included. For example, the semiconductor light emitting element150may include a blue semiconductor light emitting element emitting Blue (B) light, and a red or green phosphor for converting the blue (B) light into a color of a unit pixel may form a layer on one side of the blue semiconductor light emitting element.

The above-described fabricating method or structure of the display device using the semiconductor light emitting element may be modified into various forms. For example, the above-described display device may employ a vertical semiconductor light emitting element.

Furthermore, a modification or embodiment described in the following may use the same or similar reference numbers for the same or similar configurations of the former example and the former description may apply thereto.

FIG.7is a perspective diagram of a display device using a semiconductor light emitting element according to another embodiment of the present disclosure,FIG.8is a cross-sectional diagram taken along a cutting line D-D shown inFIG.8, andFIG.9is a conceptual diagram showing a vertical type semiconductor light emitting element shown inFIG.8.

Referring to the present drawings, a display device may employ a vertical semiconductor light emitting device of a Passive Matrix (PM) type.

The display device includes a substrate210, a first electrode220, a conductive adhesive layer230, a second electrode240and at least one semiconductor light emitting element250.

The substrate210is a wiring substrate on which the first electrode220is disposed and may contain polyimide (PI) to implement a flexible display device. Besides, the substrate210may use any substance that is insulating and flexible.

The first electrode210is located on the substrate210and may be formed as a bar type electrode that is long in one direction. The first electrode220may be configured to play a role as a data electrode.

The conductive adhesive layer230is formed on the substrate210where the first electrode220is located. Like a display device to which a light emitting device of a flip chip type is applied, the conductive adhesive layer230may include one of an Anisotropic Conductive Film (ACF), an anisotropic conductive paste, a conductive particle contained solution and the like. Yet, in the present embodiment, a case of implementing the conductive adhesive layer230with the anisotropic conductive film is exemplified.

After the conductive adhesive layer has been placed in the state that the first electrode220is located on the substrate210, if the semiconductor light emitting element250is connected by applying heat and pressure thereto, the semiconductor light emitting element250is electrically connected to the first electrode220. In doing so, the semiconductor light emitting element250is preferably disposed to be located on the first electrode220.

If heat and pressure is applied to an anisotropic conductive film, as described above, since the anisotropic conductive film has conductivity partially in a thickness direction, the electrical connection is established. Therefore, the anisotropic conductive film is partitioned into a conductive portion and a non-conductive portion.

Furthermore, since the anisotropic conductive film contains an adhesive component, the conductive adhesive layer230implements mechanical coupling between the semiconductor light emitting element250and the first electrode220as well as mechanical connection.

Thus, the semiconductor light emitting element250is located on the conductive adhesive layer230, via which an individual pixel is configured in the display device. As the semiconductor light emitting element250has excellent luminance, an individual unit pixel may be configured in small size as well. Regarding a size of the individual semiconductor light emitting element250, a length of one side may be equal to or smaller than 80 μm for example and the individual semiconductor light emitting element250may include a rectangular or square element. For example, the rectangular element may have a size equal to or smaller than 20 μm×80 μm.

The semiconductor light emitting element250may have a vertical structure.

Among the vertical type semiconductor light emitting elements, a plurality of second electrodes240respectively and electrically connected to the vertical type semiconductor light emitting elements250are located in a manner of being disposed in a direction crossing with a length direction of the first electrode220.

Referring toFIG.9, the vertical type semiconductor light emitting element250includes a p-type electrode256, a p-type semiconductor layer255formed on the p-type electrode256, an active layer254formed on the p-type semiconductor layer255, an n-type semiconductor layer253formed on the active layer254, and an n-type electrode252formed on then-type semiconductor layer253. In this case, the p-type electrode256located on a bottom side may be electrically connected to the first electrode220by the conductive adhesive layer230, and the n-type electrode252located on a top side may be electrically connected to a second electrode240described later. Since such a vertical type semiconductor light emitting element250can dispose the electrodes at top and bottom, it is considerably advantageous in reducing a chip size.

Referring toFIG.8again, a phosphor layer280may formed on one side of the semiconductor light emitting element250. For example, the semiconductor light emitting element250may include a blue semiconductor light emitting element251emitting blue (B) light, and a phosphor layer280for converting the blue (B) light into a color of a unit pixel may be provided. In this regard, the phosphor layer280may include a red phosphor281and a green phosphor282configuring an individual pixel.

Namely, at a location of configuring a red unit pixel, the red phosphor281capable of converting blue light into red (R) light may be stacked on a blue semiconductor light emitting element. At a location of configuring a green unit pixel, the green phosphor282capable of converting blue light into green (G) light may be stacked on the blue semiconductor light emitting element. Moreover, the blue semiconductor light emitting element may be singly usable for a portion that configures a blue unit pixel. In this case, the unit pixels of red (R), green (G) and blue (B) may configure a single pixel.

Yet, the present disclosure is non-limited by the above description. In a display device to which a light emitting element of a flip chip type is applied, as described above, a different structure for implementing blue, red and green may be applicable.

Regarding the present embodiment again, the second electrode240is located between the semiconductor light emitting elements250and connected to the semiconductor light emitting elements electrically. For example, the semiconductor light emitting elements250are disposed in a plurality of columns, and the second electrode240may be located between the columns of the semiconductor light emitting elements250.

Since a distance between the semiconductor light emitting elements250configuring the individual pixel is sufficiently long, the second electrode240may be located between the semiconductor light emitting elements250.

The second electrode240may be formed as an electrode of a bar type that is long in one direction and disposed in a direction vertical to the first electrode.

In addition, the second electrode240and the semiconductor light emitting element250may be electrically connected to each other by a connecting electrode protruding from the second electrode240. Particularly, the connecting electrode may include an n-type electrode of the semiconductor light emitting element250. For example, the n-type electrode is formed as an ohmic electrode for ohmic contact, and the second electrode covers at least one portion of the ohmic electrode by printing or deposition. Thus, the second electrode240and the n-type electrode of the semiconductor light emitting element250may be electrically connected to each other.

Referring toFIG.8again, the second electrode240may be located on the conductive adhesive layer230. In some cases, a transparent insulating layer (not shown) containing silicon oxide (SiOx) and the like may be formed on the substrate210having the semiconductor light emitting element250formed thereon. If the second electrode240is placed after the transparent insulating layer has been formed, the second electrode240is located on the transparent insulating layer. Alternatively, the second electrode240may be formed in a manner of being spaced apart from the conductive adhesive layer230or the transparent insulating layer.

If a transparent electrode of Indium Tin Oxide (ITO) or the like is sued to place the second electrode240on the semiconductor light emitting element250, there is a problem that ITO substance has poor adhesiveness to an n-type semiconductor layer. Therefore, according to the present disclosure, as the second electrode240is placed between the semiconductor light emitting elements250, it is advantageous in that a transparent electrode of ITO is not used. Thus, light extraction efficiency can be improved using a conductive substance having good adhesiveness to an n-type semiconductor layer as a horizontal electrode without restriction on transparent substance selection.

Referring toFIG.8again, a partition290may be located between the semiconductor light emitting elements250. Namely, in order to isolate the semiconductor light emitting element250configuring the individual pixel, the partition290may be disposed between the vertical type semiconductor light emitting elements250. In this case, the partition290may play a role in separating the individual unit pixels from each other and be formed with the conductive adhesive layer230as an integral part. For example, by inserting the semiconductor light emitting element250in an anisotropic conductive film, a base member of the anisotropic conductive film may form the partition.

In addition, if the base member of the anisotropic conductive film is black, the partition290may have reflective property as well as a contrast ratio may be increased, without a separate block insulator.

For another example, a reflective partition may be separately provided as the partition290. The partition290may include a black or white insulator depending on the purpose of the display device.

In case that the second electrode240is located right onto the conductive adhesive layer230between the semiconductor light emitting elements250, the partition290may be located between the vertical type semiconductor light emitting element250and the second electrode240each. Therefore, an individual unit pixel may be configured using the semiconductor light emitting element250. Since a distance between the semiconductor light emitting elements250is sufficiently long, the second electrode240can be placed between the semiconductor light emitting elements250. And, it may bring an effect of implementing a flexible display device having HD image quality.

In addition, as shown inFIG.8, a black matrix291may be disposed between the respective phosphors for the contrast ratio improvement. Namely, the black matrix291may improve the contrast between light and shade.

In the display device using the semiconductor light-emitting element of the present disclosure described above, the semiconductor light-emitting element grown on a wafer is placed on a wiring substrate in the flip-chip form and used as an individual pixel.

FIG.10Ais a schematic diagram showing the pixel structure of a display device using an organic light-emitting device.

Referring toFIG.10A, an example of the pixel structure of a display device using an organic light-emitting device is illustrated.

Here, as an example of the organic light-emitting device, there is an organic light-emitting diode (OLED). The following description will be made on the assumption that the organic light-emitting device is an organic light-emitting diode.

The OLED may include at least one organic layer disposed between and electrically connected to an anode and a cathode. When current is applied thereto, the anode injects holes and the cathode injects electrons into the organic layer.

The injected holes and electrons each migrate toward the oppositely charged electrode. When an electron and a hole localize on the same molecule, an “exciton,” which is a localized electron-hole pair having an excited energy state, is formed. Light is emitted when the exciton relaxes via a photoemissive mechanism.

That is, the organic light-emitting diode (OLED) may include at least one of a hole injection layer, a hole transport layer, an electron blocking layer, an emission layer, a hole blocking layer, an electron transport layer, or an electron injection layer. Hereinafter, a detailed description of the structure of the OLED will be omitted.

Referring back toFIG.10A, a unit pixel of the OLED may include red (R), green (G), and blue (B) subpixels, and may further include a white (W) subpixel. That is, inFIG.10A, the unit pixel may be composed of four subpixels including red (R), green (G), blue (B), and white (W) subpixels. InFIG.10A, the unit pixel may include four subpixels disposed in a horizontal direction, or may include four subpixels disposed in two rows.

Meanwhile, as is generally known in the art, OLED displays are very vulnerable to light, heat, or moisture due to the characteristics of the organic constituents contained in the material thereof, and thus have a problem in that an OLED emission layer is easily degraded. However, it is difficult to substantially alleviate this degradation phenomenon at present. Therefore, as described above, attempts are being made to improve brightness through structural improvement, for example, addition of white (W) subpixels.

FIG.10Bis a graph showing the degradation characteristics of the pixel of the display device using an organic light-emitting device.

Referring toFIG.10B, as described above, the OLED display is very vulnerable to light, heat, or moisture due to the characteristics of the organic constituents contained in the material thereof, which may lead to degradation in the luminance thereof.

In addition, the shorter the wavelength of the light emitted from the OLED, the greater the degradation in luminance. That is, a blue element (a blue organic emission layer) is degraded more over time.

Degradation of the blue element may entail a problem of occurrence of yellowing of the screen of the display. That is, the entire area of the screen of the display appears yellowish. This may be caused by a red-shift phenomenon, which results from reduction in the luminance of blue light due to degradation of the blue element.

FIG.11is a schematic diagram showing the pixel structure of a display device using a light-emitting element according to a first embodiment of the present disclosure.

Referring toFIG.11, a unit pixel of a display device according to a first embodiment of the present disclosure may include a first subpixel R, which emits light of a first color and includes an organic light-emitting diode (OLED), a second subpixel G, which emits light of a second color and includes an organic light-emitting diode (OLED), a third subpixel Bi, which emits light of a third color and includes an inorganic light-emitting diode (LED), and a fourth subpixel, which includes an organic light-emitting diode (OLED) emitting light in which light of the first color to light of the third color are mixed.

Each of these subpixels may be disposed between and may be electrically connected to a respective one of a plurality of segmented first electrodes340(refer toFIG.12) and a second electrode370(refer toFIG.12), which is a common electrode located above the first electrodes. This will be described in detail later.

As a specific example, the unit pixel of the display device according to the first embodiment of the present disclosure may include red (R), green (G), blue (Bi), and white (W) subpixels. InFIG.11, the unit pixel may include four subpixels disposed in a horizontal direction, or may include four subpixels disposed in two rows.

In this case, each of the red (R), green (G), and white (W) subpixels may be implemented as an organic light-emitting diode (OLED), and the blue (Bi) subpixel may be implemented as an inorganic light-emitting device (an inorganic light-emitting diode (LED)) using, for example, a nitride-based semiconductor (e.g. GaN).

As described above, because a blue OLED (a blue organic emission layer) is degraded more over time, the unit pixel may be constituted such that a blue OLED is substituted with the inorganic light-emitting diode (LED).

FIG.12is a cross-sectional view taken along line A-A inFIG.11, which shows an example of the display device using a light-emitting element according to the first embodiment of the present disclosure.

Referring toFIG.12, a display device300having an active matrix (AM) structure is illustrated. However, the present disclosure is not limited to the AM structure, and may also be applied to a display device having a passive matrix (PM) structure.

As described above with reference toFIG.11, the display device300using a light-emitting element according to the first embodiment of the present disclosure may include a plurality of segmented first electrodes340, a second electrode370, which is a common electrode located above the first electrodes340, and a plurality of subpixels351,352,353, and354, each of which is disposed between and is electrically connected to a respective one of the first electrodes340and the second electrode370to constitute an individual pixel.

These subpixels may include a first subpixel351, which emits light of a first color and includes an organic light-emitting diode (OLED), a second subpixel352, which emits light of a second color and includes an organic light-emitting diode (OLED), a third subpixel354, which emits light of a third color and includes an inorganic light-emitting diode (LED), and a fourth subpixel353, which includes an organic light-emitting diode (OLED) emitting light in which light of the first color to light of the third color are mixed. Here, each subpixel and the corresponding organic light-emitting diode (OLED) or inorganic light-emitting diode (LED) may be conceptually the same. Accordingly, these components will be denoted by the same reference numerals in the following description.

Here, each of the first electrodes340may be an anode. Each of the first electrodes340may be connected to a drain electrode Drain of a thin-film transistor311, which serves as a switching transistor, via a via electrode341.

A thin-film transistor substrate310may include an individual thin-film transistor311. The thin-film transistor311may include a gate electrode Gate located on a substrate313, a gate insulator GI located on the gate electrode Gate, and a drain electrode Drain and a source electrode Source located on the gate insulator GI. Hereinafter, a detailed description of the thin-film transistor substrate310will be omitted.

An insulating layer312may be located on the thin-film transistor substrate310, and a first planarization layer320may be located on the insulating layer.

The anode340may be disposed on the first planarization layer320so as to be connected to the individual thin-film transistor311. As mentioned above, the individual thin-film transistor311and the anode340may be connected to each other via the via electrode341, which penetrates the insulating layer312and the first planarization layer320.

FIG.12shows four subpixels constituting one individual pixel described above. That is, each of the first subpixel351emitting light of a first color, the second subpixel352emitting light of a second color, the third subpixel354emitting light of a third color, and the fourth subpixel353emitting light in which light of the first color to light of the third color are mixed may be located on a respective one of the anodes340.

Here, the first color may be red (R), the second color may be green (G), the third color may be blue (Bi), and the fourth color may be white (W).

Meanwhile, a conductive adhesive layer355may be located on at least one side surface of the inorganic light-emitting diode (LED)354. That is, the LED354may be attached to the anode340via the conductive adhesive layer355so as to be electrically connected thereto. Here, the conductive adhesive layer355is as described above. That is, the conductive adhesive layer may be a resin layer including a conductive ball, and this resin layer may be a resin layer cured by application of heat or light.

In this case, the conductive adhesive layer355may have a specific color. In one example, the conductive adhesive layer355may be white or black. In an alternative example, the conductive adhesive layer355may include a dye of any one of the first color to the third color.

Meanwhile, a color correction layer130may be located on the planarization layer320corresponding to each of the subpixels351,352,353, and354. The color correction layer130may correct the color of each subpixel.

As shown inFIG.12, the inorganic light-emitting diode (LED) constituting the third subpixel354may be thicker than the organic light-emitting diodes (OLEDs) constituting the remaining subpixels351,352, and353. Accordingly, a height compensation layer360for compensating for a height difference between the inorganic light-emitting diode (LED) and the organic light-emitting diodes (OLEDs) may be provided on the first planarization layer320.

In one example, when the height difference between the inorganic light-emitting diode (LED) and the organic light-emitting diodes (OLEDs) is large, the height compensation layer360may be composed of two or more layers.FIG.12shows an example in which the height compensation layer360includes a first height compensation layer361and a second height compensation layer362located on the first height compensation layer361.

The height of the inorganic light-emitting diode (LED) may be about four times to ten times greater than the height of the organic light-emitting diodes (OLEDs). In this case, it may be preferable to form the height compensation layer360multiple times.

The second electrode370may be located on the height compensation layer360. In addition, the second electrode370may be connected to all of the subpixels351,352,353, and354. That is, the second electrode370may be a common electrode. In this case, the LED354constituting the third subpixel may be a vertical LED. That is, the LED354may be a vertical LED in which electrodes are respectively located on the lower side and the upper side, which are opposite each other.

The height of the height compensation layer360may be at least equal to the height of the inorganic light-emitting diode (LED)354.

A second planarization layer380may be located on the second electrode370. As described above, since there is a height difference between the inorganic light-emitting diode (LED) and the organic light-emitting diodes (OLEDs), the second electrode370, which continuously interconnects the inorganic light-emitting diode (LED) and the organic light-emitting diodes (OLEDs), may be uneven due to the height difference. Therefore, the second planarization layer380may be provided in order to planarize the uneven surface of the second electrode attributable to the height difference.

A light-polarizing layer390may be located on the second planarization layer380.

FIG.13is a cross-sectional view showing a display device using a light-emitting element according to a second embodiment of the present disclosure.

Referring toFIG.13, a display device300having an active matrix (AM) structure is illustrated. However, the present disclosure is not limited to the AM structure, and may also be applied to a display device having a passive matrix (PM) structure.

The display device300using a light-emitting element according to a second embodiment of the present disclosure may include a plurality of segmented first electrodes340, a second electrode370, which is a common electrode located above the first electrodes340, and a plurality of subpixels351,352,353, and354, each of which is disposed between and is electrically connected to a respective one of the first electrodes340and the second electrode370to constitute an individual pixel.

FIG.13shows four subpixels constituting one individual pixel described above. That is, each of the first subpixel351emitting light of a first color, the second subpixel352emitting light of a second color, the third subpixel354emitting light of a third color, and the fourth subpixel353emitting light in which light of the first color to light of the third color are mixed may be located on a respective one of the anodes340.

Here, the first color may be red (R), the second color may be green (G), the third color may be blue (Bi), and the fourth color may be white (W).

In this case, a quantum dot356may be located on the third subpixel354emitting blue light, i.e. the blue LED. The quantum dot356may be provided for uniformity of the wavelength of light. In addition, the blue LED354and the blue quantum dot356may be used together for color correction.

The quantum dot356emitting blue light may be located on the second electrode370at a position corresponding to the blue LED354. The quantum dot356may correct the color of light from the blue LED so that the color of light from the blue LED becomes the same as that from the OLED when the LED354is used in the organic light-emitting diode display.

Other parts not described herein may be the same as those described above with reference toFIG.12. Therefore, duplicate descriptions thereof will be omitted.

FIG.14is a cross-sectional view showing a display device using a light-emitting element according to a third embodiment of the present disclosure.

Referring toFIG.14, a display device300having an active matrix (AM) structure is illustrated. However, the present disclosure is not limited to the AM structure, and may also be applied to a display device having a passive matrix (PM) structure.

The display device300using a light-emitting element according to a third embodiment of the present disclosure may include a plurality of segmented first electrodes340, a second electrode370, which is a common electrode located above the first electrodes340, and a plurality of subpixels351,352,353, and357, each of which is disposed between and is electrically connected to a respective one of the first electrodes340and the second electrode370to constitute an individual pixel.

FIG.14shows four subpixels constituting one individual pixel described above. That is, each of the first subpixel351emitting light of a first color, the second subpixel352emitting light of a second color, the third subpixel357emitting light of a third color, and the fourth subpixel353emitting light in which light of the first color to light of the third color are mixed may be located on a respective one of the anodes340.

Here, the first color may be red (R), the second color may be green (G), the third color may be blue (Bi), and the fourth color may be white (W).

In this case, the third subpixel357emitting blue light may be formed in a manner such that a blue horizontal LED is provided in a flip-chip bonding scheme.

That is, the orientation of the horizontal LED may be reversed such that the two electrodes thereof are located at the lower side thereof. The LED may be connected to the second electrode370through a different path in a manner such that one electrode thereof is connected to an anode343and the remaining electrode thereof is connected to a separate cathode342.

In this case, as shown inFIG.14, the inorganic light-emitting diode (LED) constituting the third subpixel357may be340than the organic light-emitting diodes (OLEDs) constituting the remaining subpixels351,352, and353. Accordingly, a height compensation layer360for compensating for the height difference between the inorganic light-emitting diode (LED) and the organic light-emitting diodes (OLEDs) may be provided on a first planarization layer320.

However, the thickness of the horizontal LED357may be less than that of the vertical LED354. Accordingly, it may be preferable to compensate for the height difference between the inorganic light-emitting diode (LED) and the organic light-emitting diodes (OLEDs) using a single height compensation layer360.

Meanwhile, because the upper side of the horizontal LED357does not need to be connected to the second electrode370, an open portion371may be formed in the second electrode370so as to be open at a position at which the horizontal LED357is located.

Accordingly, in this case, it is not necessary to form the height compensation layer360to the same thickness as the horizontal LED357, and thus the height of the height compensation layer360may be reduced.

Other parts not described herein may be the same as those described above with reference toFIG.12. Therefore, duplicate descriptions thereof will be omitted.

FIG.15is a cross-sectional view showing a display device using a light-emitting element according to a fourth embodiment of the present disclosure.

Referring toFIG.15, a display device300having an active matrix (AM) structure is illustrated. However, the present disclosure is not limited to the AM structure, and may also be applied to a display device having a passive matrix (PM) structure.

The display device300using a light-emitting element according to a fourth embodiment of the present disclosure may include a plurality of segmented first electrodes340, a second electrode370, which is a common electrode located above the first electrodes340, and a plurality of subpixels351,352,353, and358, each of which is disposed between and is electrically connected to a respective one of the first electrodes340and the second electrode370to constitute an individual pixel.

FIG.15shows four subpixels constituting one individual pixel described above. That is, each of the first subpixel351emitting light of a first color, the second subpixel352emitting light of a second color, the third subpixel358emitting light of a third color, and the fourth subpixel353emitting light in which light of the first color to light of the third color are mixed may be located on a respective one of the anodes340.

Here, the first color may be red (R), the second color may be green (G), the third color may be blue (Bi), and the fourth color may be white (W).

In this case, the third subpixel358emitting blue light may be formed in a manner such that a blue horizontal LED is provided in a normal bonding scheme.

That is, the orientation of the horizontal LED is maintained in a normal state such that the horizontal LED is located at one side of the anode340. The LED may be connected to the second electrode370through a different path in a manner such that one electrode358athereof is connected to an anode343and the remaining electrode358bthereof is connected to a separate cathode342.

In this way, in the case in which the horizontal LED358is provided in a normal bonding scheme, insulating structures363,364, and365for electrically isolating the two electrodes358aand358bof the LED358may be further provided.

In this case, as shown inFIG.15, the inorganic light-emitting diode (LED) constituting the third subpixel358may be thicker than the organic light-emitting diodes (OLEDs) constituting the remaining subpixels351,352, and353. Accordingly, a height compensation layer360for compensating for the height difference between the inorganic light-emitting diode (LED) and the organic light-emitting diodes (OLEDs) may be provided on a first planarization layer320.

Other parts not described herein may be the same as those described above with reference toFIG.12. Therefore, duplicate descriptions thereof will be omitted.

FIG.16is a schematic diagram showing the pixel structure of a display device using a light-emitting element according to a fifth embodiment of the present disclosure.

A unit pixel of a display device according to a fifth embodiment of the present disclosure may include a first subpixel R, which emits light of a first color and includes an organic light-emitting diode (OLED), a second subpixel G, which emits light of a second color and includes an organic light-emitting diode (OLED), a third subpixel Bi, which emits light of a third color and includes an inorganic light-emitting diode (LED), and a fourth subpixel, which includes an organic light-emitting diode (OLED) emitting light in which light of the first color to light of the third color are mixed.

In addition, a fifth subpixel Bo, which emits light of the third color and includes an organic light-emitting diode, may be further included. That is, light of the third color may be emitted from two subpixels, and the two subpixels may complement each other in order to stably emit light of the third color.

Each of these subpixels may be disposed between and may be electrically connected to a respective one of a plurality of segmented first electrodes340(refer to FIG.17) and a second electrode370(refer toFIG.17), which is a common electrode located above the first electrodes. This will be described in detail later.

As a specific example, the unit pixel of the display device according to the fifth embodiment of the present disclosure may include red (R), green (G), blue (Bi and Bo), and white (W) subpixels. InFIG.16, the unit pixel may include five subpixels disposed in a horizontal direction, or may include five subpixels disposed in two rows.

In this case, each of the red (R), green (G), blue (Bo), and white (W) subpixels may be implemented as an organic light-emitting diode (OLED), and the other blue (Bi) subpixel may be implemented as an inorganic light-emitting device (an inorganic light-emitting diode (LED)) using, for example, a nitride-based semiconductor (e.g. GaN).

As described above, because the blue OLED (the blue organic emission layer) is degraded more over time, the unit pixel may be constituted such that the blue OLED is supplemented using the inorganic light-emitting diode (LED).

In this case, as illustrated, the size of each of the third subpixel Bi and the fourth subpixel W may be smaller than the size of the first subpixel R or the second subpixel G. In this case, for example, the size of each of the third subpixel Bi and the fourth subpixel W may be half the size of the first subpixel R or the second subpixel G.

The reason for this is that the size of an LED may be smaller than that of an OLED. Accordingly, the fourth subpixel W may be located at one side of the third subpixel Bi, which is implemented as an LED.

FIG.17is a cross-sectional view taken along line C-C inFIG.16, which shows the display device using a light-emitting element according to the fifth embodiment of the present disclosure.

Referring toFIG.17, a unit pixel of the display device according to the fifth embodiment of the present disclosure may include a first subpixel351, which emits light of a first color and includes an organic light-emitting diode (OLED), a second subpixel352, which emits light of a second color and includes an organic light-emitting diode (OLED), a third subpixel354, which emits light of a third color and includes an inorganic light-emitting diode (LED), and a fifth subpixel356, which emits light of the third color and includes an organic light-emitting diode.

As described above with reference toFIG.16, the fifth subpixel356may be located between the second subpixel352and the third subpixel354.

In this case, the position of the fourth subpixel is not shown inFIG.16. In the cross-sectional view, the fourth subpixel is not visible because the third subpixel354overlaps the same.

As described above, the third subpixel354, which includes an inorganic light-emitting diode (LED), and the fifth subpixel356, which emits light of the third color and includes an organic light-emitting diode, may complement each other in order to stably emit light of the third color (blue light).

Each of these subpixels may be disposed between and may be electrically connected to a respective one of a plurality of segmented first electrodes340and a second electrode370, which is a common electrode located above the first electrodes.

Other parts not described herein may be the same as those described above with reference toFIG.12. Therefore, duplicate descriptions thereof will be omitted.

FIGS.18to20are diagrams showing examples of embodying the color characteristics of the display by implementing a color using a conductive adhesive layer.

As described above, the conductive adhesive layer355may be located on at least one side surface of the inorganic light-emitting diode (LED)354. That is, the LED354may be attached to the anode340via the conductive adhesive layer355so as to be electrically connected thereto.

In this case, the conductive adhesive layer355may have a specific color.

Referring toFIG.18, the conductive adhesive layer355may include a dye of any one of the first to third colors. That is, a dye having any one of red, green, and blue colors may be included.

The conductive adhesive layer355including the dye may embody specific characteristics of the display. For example, when a specific color component is required in order to implement the display, the conductive adhesive layer355may be implemented to include a dye of the corresponding color.

Alternatively, as shown inFIG.19, the conductive adhesive layer355may be white, or may include a white dye. The white conductive adhesive layer355may block optical interference. In addition, the white conductive adhesive layer355may serve to improve the luminance of the display.

Meanwhile, as shown inFIG.20, the conductive adhesive layer355may be black, or may include a black dye. The black conductive adhesive layer355may block optical interference. In addition, the black conductive adhesive layer355may serve to improve a contrast ratio.

FIGS.21to28are cross-sectional views showing a method of manufacturing the display device using a light-emitting element according to the first embodiment of the present disclosure.

Hereinafter, a method of manufacturing the display device using a light-emitting element according to the first embodiment of the present disclosure will be described stepwise with reference toFIGS.21to28.

First, referring toFIG.21, a plurality of LEDs354may be manufactured on a substrate400. In this case, the substrate400may be a sapphire substrate, and the LEDs354may be gallium nitride (GaN)-based blue LEDs. A detailed description of the process of forming the LEDs354will be omitted.

Thereafter, the conductive adhesive layer355described above is formed on a target LED354, which is to be attached (transferred) to the display device, among the plurality of LEDs354.

Subsequently, referring toFIG.22, the LEDs354manufactured on the substrate400formed as described above are placed above a prepared thin-film transistor substrate310. In this case, the LED354having the conductive adhesive layer355formed thereon is placed above an anode340, at which a blue subpixel is to be located.

Thereafter, the substrate400is pressed onto the thin-film transistor substrate310, and accordingly, a conductive ball in the conductive adhesive layer355electrically interconnects the LED354and the anode340.

In addition, heat or light is applied to the conductive adhesive layer355so that the conductive adhesive layer355is cured, and accordingly, the LED354may be firmly attached to the anode340.

Thereafter, a laser410is applied to the corresponding LED354to remove the substrate400therefrom, thereby realizing the state shown inFIG.23.

Referring toFIG.24, OLED subpixels are formed on the remaining anodes340. That is, a red OLED layer351, a green OLED layer352, and a white OLED layer353are formed.

Thereafter, referring toFIG.25, a first height compensation layer361is primarily formed to a height that makes it possible to cover the OLED subpixels351,352, and353. That is, the height of the first height compensation layer361may be at least as high as the height that makes it possible to cover the OLED subpixels351,352, and353.

Subsequently, referring toFIG.26, a second height compensation layer362is formed to a height that makes it possible to cover the LED354. That is, the height of the second height compensation layer362may be at least as high as the height that makes it possible to cover the LED subpixel354.

Thereafter, referring toFIG.27, a second electrode370, which is a common electrode that electrically interconnects the OLED subpixels351,352, and353and the LED subpixel354, is formed.

As described above, in the case in which the first height compensation layer361and the second height compensation layer362are sequentially formed to constitute the height compensation layer360, the second electrode370may be stably formed without damage thereto, such as breakage.

Subsequently, referring toFIG.28, a second planarization layer380is formed on the second electrode370, which is formed to be stable.

Thereafter, a light-polarizing layer390may be formed on a second planarization layer380. As a result, a display device having the structure shown inFIG.12described above may be manufactured.

As described above, a hybrid light-emitting array structure in which an organic light-emitting diode and an inorganic light-emitting diode are arranged in combination may be provided.

A display device having such a hybrid light-emitting array structure is capable of exhibiting dramatically improved reliability while maintaining the advantages of organic light-emitting diodes.

Consequently, it is possible to overcome one of the major problems with a display device using an OLED, thereby greatly improving the productivity and quality thereof.

The above description is merely illustrative of the technical idea of the present disclosure. Those of ordinary skill in the art to which the present disclosure pertains will be able to make various modifications and variations without departing from the essential characteristics of the present disclosure.

Therefore, embodiments disclosed in the present disclosure are not intended to limit the technical idea of the present disclosure, but to describe the same, and the scope of the technical idea of the present disclosure is not limited by such embodiments.

The scope of protection of the present disclosure should be interpreted by the claims below, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present disclosure.

INDUSTRIAL APPLICABILITY

The present disclosure may provide a light-emitting device using a semiconductor light-emitting element having a size in micrometers (μm) and a method of manufacturing the same.