Miniature LED module and display device provided with same

Abstract

The utility model relates to a miniature LED module, comprising a unit substrate; the plurality of micro LED chips are mounted on the top surface of the unit substrate; the protective film covers the top surface of the unit substrate and the plurality of micro LED chips; the black film is arranged on the top surface of the protective film; and an optical substance provided on the top surface of the black film, the optical substance including a polymer substance of a transparent material, the polymer substance having a high refractive index or being formed to a predetermined thickness or more, so that a bright line can be improved even if a gap is generated at a boundary portion between a plurality of micro LED modules.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of micro-LED module and display device with the micro-LED module, the micro-LED module is used to solve the gap caused by the boundary part between the plurality of micro-LED modules constituting display device possibly generated The light leakage of LED caused, so that only the boundary part between micro-LED module looks relatively bright bright line problem. BACKGROUND

[0002] With the development of information society, the requirements for display devices are also increasing in various forms. In recent years, display devices including liquid crystal displays (LCD), field emission displays (FED), plasma display panels (PDP), and electroluminescence devices have been developed to address this issue.

[0003] Currently, the main commercial display devices are represented by LCD and OLED (Organic Light Emitting Diodes). In the case of LCD, since it cannot emit light by itself, it requires a backlight unit (Back Light Unit) to emit light. There is a problem that it is difficult to achieve flexibility (flexible). Although OLED can emit light by itself, it has the problems of short lifespan and poor yield in mass production.

[0004] Therefore, in recent years, display devices composed of micro-LEDs with a size of 100 microns or less are being developed, which are composed of a single pixel. Since micro-LED is a self-emitting display, it does not require an additional backlight or color filter, and can be used according to various materials, thus being advantageous for flexibility. In addition, since it can use a thin structure to pass the same amount of light with low power consumption, it has the advantage of high efficiency of power consumption based on structural advantages compared to LCD and OLED.

[0005] In the case of micro-LED, it is widely used in spacious places such as marketing, exhibition places or event sites of enterprises to achieve the purpose of large screen. In particular, since a plurality of micro-LED modules can be arranged to achieve a large screen, it has the advantages of being able to save manufacturing costs and being easily disassembled and assembled as needed.

[0006] However, since a large screen is implemented by arranging a plurality of micro LED modules, a gap can occur at a boundary portion between the modules. Also, there is a problem in that LED light leaks through the gap, thereby causing a phenomenon in which only the boundary portion between the modules appears brighter and the entire screen appears non-uniform.

[0007] Such a problem is called a bright line, and further, in order to implement a large screen, several to several hundreds of micro LED modules are arranged, and thus such a problem becomes greater, and thus a scheme for improving the bright line is required. Utility Model Content

[0008] Problem to be Solved by the Utility Model

[0009] The utility model discloses a micro LED module and display device provided with the micro LED module, and more specifically, the micro LED module is provided with an optical substance containing a high molecular substance of transparent material on the top surface of the black film, and the high molecular substance has a high refractive index or is formed to be above a specified thickness, so that even if a gap occurs at the boundary portion between a plurality of micro LED modules, the bright line can be improved.

[0010] In addition, the utility model aims to provide a micro LED module and display device provided with the micro LED module, which prevents the black film from being peeled off or damaged by the optical substance provided on the top surface of the black film, thereby preventing the picture quality from being lowered due to the difference in luminance on the screen.

[0011] The problem to be solved by the utility model is not limited to the above-mentioned problems, and those skilled in the art can clearly understand other problems not mentioned by the following description.

[0012] Technical scheme for solving the problem

[0013] The utility model provides a micro LED module, which comprises a unit substrate, a plurality of micro LED chips installed on the top surface of the unit substrate, a protective film covering the top surface of the unit substrate and the plurality of micro LED chips, a black film provided on the top surface of the protective film, and an optical substance provided on the top surface of the black film, wherein the optical substance comprises a high molecular substance of transparent material.

[0014] The high molecular substance can have a refractive index of at least 1.3 or more.

[0015] The high molecular substance can have a thickness of at least 5 micrometers (μm) or more.

[0016] The high molecular substance can include at least one of polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE), ethylene vinyl acetate copolymer (EVA), polyimide (PI), epoxy, acrylic, and silicon.

[0017] The utility model provides a kind of display device, comprising: setting support;And multiple micro-LED modules, on the setting support with grid shape is spliced (tiling), the micro-LED module includes: unit substrate;Multiple micro-LED chips, install in the top surface of the unit substrate;Protective film, covers the top surface of the unit substrate and the multiple micro-LED chips;Black film, is set to the top surface of the protective film;And optical substance, is set to the top surface of the black film, the optical substance includes the high molecular substance of transparent material.

[0018] The high molecular substance can have a refractive index of at least 1.3 or more.

[0019] The high molecular substance can have a thickness of at least 5 micrometers (μm) or more.

[0020] The high molecular substance can include at least one of polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE), ethylene vinyl acetate copolymer (EVA), polyimide (PI), epoxy, acrylic, and silicon.

[0021] Utility model effect

[0022] The micro-LED module and the display device provided with the same according to the utility model have the optical substance on the top surface of the black film, the optical substance contains the high molecular substance of transparent material, the high molecular substance has a high refractive index or is formed to be a predetermined thickness or more, so that even if a gap is generated at the boundary portion between the multiple micro-LED modules, the bright line can be improved.

[0023] In addition, the optical substance provided on the top surface of the black film can prevent the black film from being peeled off or damaged, and prevent the difference in luminance from being generated on the screen, thereby preventing the image quality from being degraded.

[0024] The application possibilities and the addition range of the utility model will be further clear through the following detailed description. However, since the person skilled in the art can clearly understand various changes and modifications within the idea and scope of the utility model, it should be understood that the specific embodiments of the detailed description and the preferred embodiments of the utility model are only examples. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a block diagram for explaining each configuration of the display device.

[0026] Figure 2 is an exploded view of the display device of an embodiment of the present application.

[0027] Figure 3 is an exploded view of the micro LED module of an embodiment of the present application.

[0028] Figure 4 is a side view of the micro LED module of an embodiment of the present application.

[0029] Figures 5 to 8 is a cross-sectional view along Figure 2 A-A' of FIG. 1, for explaining various embodiments of improving a bright line by the micro LED module according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] Hereinafter, embodiments disclosed in the present application will be described in detail with reference to the accompanying drawings, regardless of reference numerals, and for the same or similar constituent elements, the same reference numerals are assigned and repeated explanation thereof will be omitted. The suffixes "module" and "part" of the constituent elements used in the following description are assigned or mixed only in consideration of writing convenience and do not have meanings or roles of mutually distinguishing by themselves. Also, in describing the present specification, if it is judged that a detailed description of related known technologies can unnecessarily obscure the gist of the present application, detailed description thereof will be omitted. Also, the drawings are merely for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed in the present specification is not limited by the drawings, and should be interpreted to include all modifications, equivalents, and even alternatives included in the idea and technical scope of the present application.

[0031] The terms "first", "second", and the like can be used to describe various constituent elements, but the constituent elements should not be limited by the above terms. The above terms are used only to distinguish one constituent element from another.

[0032] It should be understood that if one constituent element is described as "connected" or "coupled" to another constituent element, the other constituent element can be directly connected or coupled, or other constituent elements can be present therebetween. In contrast, it should be understood that if one constituent element is described as "directly connected" or "directly coupled" to another constituent element, no other constituent element is present therebetween.

[0033] The singular expression used includes the plural expression unless the context clearly indicates otherwise.

[0034] It should be understood that the terms "comprise" or "have" or the like used in the present specification are only intended to describe the presence of a characteristic, number, step, work, constituent element, component or a combination thereof described in the specification, and are not intended to preclude the possibility of the presence or addition of one or more other characteristics, numbers, steps, works, constituent elements, components or combinations thereof.

[0035] On the other hand, the display apparatus described in the present specification, for example, is a smart display apparatus which adds a computer function to a broadcast receiving function, that is, is faithful to the broadcast receiving function and adds an Internet function or the like, thereby can have an interface which is convenient to use such as a handwriting type input apparatus, a touch screen, or a space remote controller or the like. Also, with the support of a wired or wireless Internet function, it is connected to the Internet and a computer, thereby can perform a function such as an e-mail, a web browsing, an online banking, or a game or the like. For such various functions, a standardized general OS (Operation System) can be used.

[0036] Therefore, the display apparatus described in the present application, for example, since various application programs can be freely added or deleted in a general OS kernel, various functions which are friendly to a user can be performed. More specifically, for example, the display apparatus can be a network TV, an HBBTV (Hybrid Broadcast / Broad band TV), a smart TV, or the like, and according to circumstances, can also be applied to a smart phone.

[0037] Figure 1 is a block diagram for explaining each constituent of the display apparatus 100. The display apparatus 100 can include a broadcast receiving part 110, an external device interface part 171, a network interface part 172, a storage part 140, a user input interface part 173, an input part 130, a control part 180, a display module 150, an audio output part 160, and / or a power supply part 190.

[0038] The broadcast receiving part 110 can include a tuner part 111 and a demodulation part 112.

[0039] On the other hand, the display apparatus 100 is different from the drawing, and in the broadcast receiving part 110, the external device interface part 171, and the network interface part 172, only the external device interface part 171 and the network interface part 172 can be included. That is, the display apparatus 100 can not include the broadcast receiving part 110.

[0040] The tuner part 111 can select a broadcast signal corresponding to a channel selected by a user or all channels set in a broadcast signal received through an antenna (not shown) or a cable (not shown). The tuner part 111 can convert the selected broadcast signal into an intermediate frequency signal or a baseband video or voice signal.

[0041] For example, the tuner part 111 can convert into a digital IF signal (DIF) if the selected broadcast signal is a digital broadcast signal, and can convert into an analog baseband video or voice signal (CVBS / SIF) if it is an analog broadcast signal. That is, the tuner part 111 can process a digital broadcast signal or an analog broadcast signal. The analog baseband video or voice signal (CVBS / SIF) output from the tuner part 111 can be directly input to the control part 180.

[0042] On the other hand, the tuner part 111 can sequentially select broadcast signals of all broadcast channels stored by a channel memory function among the received broadcast signals and convert them into an intermediate frequency signal or a baseband video or voice signal.

[0043] On the other hand, the tuner part 111 can be provided with a plurality of tuners in order to receive broadcast signals of a plurality of channels. Or, it can be a single tuner that simultaneously receives broadcast signals of a plurality of channels.

[0044] The demodulation part 112 can perform a demodulation action by receiving a digital IF signal (DIF) converted by the tuner part 111. The demodulation part 112 can output a stream signal (TS) after performing demodulation and channel decoding. At this time, the stream signal can be a signal in which an image signal, a voice signal, or a data signal is multiplexed.

[0045] The stream signal output from the demodulation part 112 can be input to the control part 180. The control part 180 can output an image through the display module 150 and output a voice through the audio output part 160 after performing demultiplexing, image / voice signal processing, etc.

[0046] The sensing part 120 refers to a device that detects a change within the display apparatus 100 or detects a change outside. For example, it can include at least one of a proximity sensor, an illumination sensor, a touch sensor, an infrared sensor (IR sensor), an ultrasonic sensor, an optical sensor (e.g., a camera), a voice sensor (e.g., a microphone), a battery gauge, and an environmental sensor (e.g., a hygrometer, a thermometer, etc.).

[0047] The control part 180 can control to check a state of the display apparatus 100 according to information collected in the sensing part 120 and, when a problem occurs, inform the user or adjust itself to maintain an optimal state.

[0048] In addition, the content, quality, and size of the image provided to the display module 150 can be controlled differently according to the viewer detected by the sensing part 120 or the illuminance of the surroundings, etc., to provide the optimal viewing environment. As the smart TV advances, the functions mounted on the display device 100 are increasing, and the sensing part 120 is also increasing along with the functions.

[0049] The input part 130 can be provided at one side of the main body of the display device 100. For example, the input part 130 can include a touch pad and a physical button, etc. The input part 130 can receive various user instructions related to the operation of the display device 100, and can transmit a control signal corresponding to the input instruction to the control part 180.

[0050] Recently, as the size of the bezel of the display device 100 becomes smaller, and more and more display devices 100 are minimizing the physical form of the button form of the input part 130 exposed to the outside. Instead, the smallest physical button is provided at the back or side, and the user input can be received through the touch pad or the user input interface part 173 described later, via the remote control device 200.

[0051] The storage part 140 can store programs for controlling each signal processing and control within the control part 180, and can also store the image, voice, or data signal processed by the signal. For example, the storage part 140 stores an application program designed to perform various jobs that can be processed via the control part 180, and can selectively provide a part of the stored application program when requested by the control part 180.

[0052] There is no particular limitation on the program stored in the storage part 140 as long as it is a program executed via the control part 180. The storage part 140 can perform a function of temporarily storing the image, voice, or data signal received from the external device through the external device interface part 171. The storage part 140 can store information related to a predetermined broadcast channel through a channel memory function such as channel mapping.

[0053] Figure 1 The storage part 140 and the control part 180 are shown as being separately provided, but the scope of the present application is not limited thereto, and the storage part 140 can also be included in the control part 180.

[0054] The storage part 140 can be at least one of a volatile memory (e.g., DRAM, SRAM, SDRAM, etc.) or a non-volatile memory (e.g., a flash memory, a hard disk drive (HDD), a solid-state drive (SSD), etc.).

[0055] The display module 150 can convert image signals, data signals, OSD signals, and control signals processed by the control part 180 or image signals, data signals, and control signals received from the interface part 171, etc. to generate a driving signal.

[0056] Also, the display module 150 can include a micro LED module of an embodiment of the present application described below.

[0057] The display module 150 can be a flexible display or the like, and also can be a three-dimensional display (3D display). The three-dimensional display module 150 can be classified into a non-glasses type and a glasses type.

[0058] The display apparatus 100 can include the display module 150 occupying most of the area of the front surface, and a case covering the back surface and the side surface of the display module 150 and wrapping the display module 150.

[0059] The LCD mainly used in the past cannot emit light by itself, and thus light is supplied through a backlight unit. The backlight unit is a device that uniformly supplies a light source and light supplied from the light source to liquid crystals located on the front surface. Although a thin LCD can be implemented as the backlight unit is gradually thinned, it is difficult to implement the backlight unit with a curved material, and in the case where the backlight unit is curved, it is difficult to supply uniform light to the liquid crystals, and thus there is a problem in that the brightness of a screen varies.

[0060] On the other hand, in the case of an LED (Light Emitting Diode), since elements constituting a pixel can each emit light by itself, there is no need to use a backlight unit, and thus a curved display module 150 can be implemented. Also, since each element emits light by itself, even if the positional relationship with an adjacent element changes, it does not affect the brightness of itself, and thus a curved display module 150 can be implemented.

[0061] An LED panel, which is a technology using a single LED element as a single pixel, can implement a curved display module 150 since the size of the LED element can be reduced compared to the past. In particular, in the case of a micro LED of the present application described below, the size of a chip constituting a single pixel can be formed to be 100 micrometers (μm) or less.

[0062] The display module 150 can include a first power supply part, a first signal module, and a magnet.

[0063] One side of the display module 150 displaying an image can be referred to as a front or a front side. When the display module 150 displays an image, one side on which the image cannot be observed can be referred to as a rear or a back side. On the other hand, the display module 150 can be constituted by a touch screen, and can be used as an input device as well as an output device.

[0064] The audio output part 160 receives a signal processed by the control part 180 for voice and outputs it as voice.

[0065] The interface part 170 performs a passage function of various external devices connected to the display device 100. The interface part can include not only a wired method of transmitting / receiving data through a cable, but also a wireless method using an antenna.

[0066] The interface part 170 can include at least one of a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port connected to a device provided with an identification module, an audio I / O (Input / Output) port, a video I / O (Input / Output) port, and a headphone port.

[0067] As an example of the wireless method, the aforementioned broadcast receiving part 110 can be included, and not only a broadcast signal, but also a mobile communication signal, a short distance communication signal, a wireless Internet signal, and the like can be included.

[0068] The external device interface part 171 can transmit or receive data with a connected external device. To this end, the external device interface part 171 can include an A / V input / output part (not shown).

[0069] The external device interface part 171 can be connected to an external device such as a DVD (Digital Versatile Disk), a Bluray, a game device, a camera, a camcorder, a computer (a notebook computer), and a set-top box, and can perform an input / output action with the external device.

[0070] In addition, the external device interface part 171 establishes a communication network with various remote control devices 200, and thus can receive a control signal related to an action of the display device 100 from the remote control device 200 or transmit data related to an action of the display device 100 to the remote control device 200.

[0071] The external device interface 171 can include a wireless communication part (not shown) for near field wireless communication with other electronic devices. Through such a wireless communication part (not shown), the external device interface 171 can exchange data with adjacent mobile terminals. In particular, the external device interface 171 can receive device information, executed application information, and application images, etc. from a mobile terminal in a mirroring mode.

[0072] The network interface 172 can provide an interface for connecting to a wired / wireless network including the Internet, to the display device 100. For example, the network interface 172 can receive content or data provided by the Internet or a content provider or a network reception operator through a network. On the other hand, the network interface 172 can include a communication module (not shown) for connecting to a wired / wireless network.

[0073] The external device interface 171 and / or the network interface 172 can include a communication module for near field communication such as Wi-Fi (Wireless Fidelity), Bluetooth, Bluetooth Low Energy (BLE), Zigbee, and Near Field Communication (NFC), and a communication module for cellular communication such as LTE (long-term evolution), LTE-A (LTE Advance), CDMA (code division multiple access), WCDMA (wide band CDMA), UMTS (universal mobile telecommunications system), and WiBro (Wireless Broad band), etc.

[0074] The user input interface 173 can deliver a signal input by a user to the control part 180, or can deliver a signal from the control part 180 to the user. For example, it can receive / transmit a user input signal such as a power on / off, a channel selection, and a screen setting, etc. from / to the remote control device 200, or deliver a user input signal input from local keys (not shown) such as a power key, a channel key, a volume key, and a setting value, etc. to the control part 180, or deliver a user input signal input from a sensor part (not shown) that senses a user's gesture to the control part 180, or transmit a signal from the control part 180 to the sensor part.

[0075] The control unit 180 can include at least one processor and can control the overall operation of the display apparatus 100 using the processor included therein. The processor can be a general-purpose processor such as a central processing unit (CPU). Of course, the processor can be a dedicated device such as an ASIC or other hardware-based processor.

[0076] The control unit 180 demultiplexes a stream input through the tuner unit 111, the demodulation unit 112, the external device interface unit 171, or the network interface unit 172 or processes the demultiplexed signal, thereby being able to generate and output a signal for image or voice output.

[0077] An image signal processed by the control unit 180 is input to the display module 150, thereby being able to be displayed as an image corresponding to the image signal. In addition, an image signal processed by the control unit 180 can be input to an external output device through the external device interface unit 171.

[0078] A voice signal processed by the control unit 180 can be output in the form of sound through the audio output unit 160. In addition, a voice signal processed by the control unit 180 can be input to an external output device through the external device interface unit 171. Figure 2 Although not shown, the control unit 180 can include a demultiplexing unit and an image processing unit, etc. In this regard, reference will be made to Figure 3 which will be described later.

[0079] In addition to this, the control unit 180 can control the overall operation within the display apparatus 100. For example, the control unit 180 can control the tuner unit 111 to select a broadcast corresponding to a channel selected by a user or a stored channel.

[0080] In addition, the control unit 180 can control the display apparatus 100 by a user instruction input through the user input interface unit 173 or by an internal program. On the other hand, the control unit 180 can control the display module 150 to display an image. At this time, the image displayed by the display module 150 can be a still image or a video, and can be a 2D image or a 3D image.

[0081] On the other hand, the control unit 180 can cause a predetermined 2D object to be displayed within an image displayed by the display module 150. For example, the object can be at least one of a connected web page screen (newspaper, magazine, etc.), an electronic program guide (EPG), various directories, a widget, an icon, a still image, a video, and text.

[0082] On the other hand, the control unit 180 can modulate and / or demodulate the signal by using an amplitude shift keying (ASK) method. The amplitude shift keying (ASK) method can refer to a method of modulating a signal by changing an amplitude of a carrier according to a data value, or a method of restoring an analog signal to a digital data value according to the amplitude of the carrier.

[0083] For example, the control unit 180 can modulate an image signal using the amplitude shift keying (ASK) method, and transmit the modulated image signal through the wireless communication module.

[0084] For example, the control unit 180 can demodulate an image signal received through the wireless communication module using the amplitude shift keying (ASK) method, and process the demodulated image signal.

[0085] Accordingly, the display apparatus 100 can easily transmit and receive a signal with another image display apparatus disposed adjacent thereto, without using a unique identifier such as a MAC (Media Access Control Address) or a complex communication protocol such as TCP / IP (Transmission Control Protocol / Internet Protocol).

[0086] On the other hand, the display apparatus 100 can further include a photographing unit (not shown). The photographing unit can photograph a user. The photographing unit can be implemented as one camera, and is not limited thereto, but can be implemented as a plurality of cameras. On the other hand, the photographing unit can be embedded in the display apparatus 100 on an upper portion of the display module 150, or can be separately disposed. Image information photographed by the photographing unit can be input to the control unit 180.

[0087] The control unit 180 can identify a position of a user from an image photographed by the photographing unit. For example, the control unit 180 can grasp a distance (z-axis coordinate) between the user and the display apparatus 100. In addition thereto, the control unit 180 can grasp an x-axis coordinate and a y-axis coordinate within the display module 150 corresponding to the position of the user.

[0088] The control unit 180 can detect a gesture of a user based on any one or a combination of an image photographed by the photographing unit or a signal detected from the sensor unit.

[0089] The power supply unit 190 can supply a corresponding power to the entire display apparatus 100. In particular, the power supply unit 190 can supply the power to the control unit 180 which can be implemented as an SOC (System On Chip), the display module 150 for image display, the audio output unit 160 for audio output, and the like.

[0090] Specifically, the power supply unit 190 can be provided with a converter (not shown) that converts an alternating current power supply into a direct current power supply, and a Dc / Dc converter (not shown) that converts the level of the direct current power supply.

[0091] On the other hand, the power supply unit 190 functions to receive a power supply from the outside and distribute the power supply to each component. The power supply unit 190 can be used in a manner in which it is directly connected to an external power supply to supply an alternating current power supply, and can include a power supply unit 190 that is used in a manner in which it includes a battery and is charged.

[0092] In the former case, it is used by connecting a cable, and it is difficult to move or the range of movement is limited. In the latter case, although it is free to move, the weight corresponding to the battery is increased, and the volume is large, and in order to charge, it is necessary to be directly connected to a power cable or to be combined with a charging placement unit (not shown) that supplies a power supply for a predetermined time.

[0093] The charging placement unit can be connected to the display device through a terminal exposed to the outside, or can charge the built-in battery when using a wireless method.

[0094] The remote control device 200 can transmit a user input to the user input interface unit 173. To this end, the remote control device 200 can use a Bluetooth, RF (Radio Frequency), infrared communication, UWB (Ultra-wideband), ZigBee, or the like. In addition, the remote control device 200 can receive an image, a voice, or a data signal, or the like, output from the user input interface unit 173, and display it on the remote control device 200 or output it in the form of sound.

[0095] On the other hand, the display device 100 described above can be a stationary type or a mobile type digital broadcast receiver capable of receiving a digital broadcast.

[0096] On the other hand, Figure 1 The block diagram of the display device 100 shown is only a block diagram of one embodiment of the present application, and each constituent element in the block diagram can be integrated, added, or omitted according to the specifications of the display device 100 actually implemented.

[0097] That is, two or more constituent elements can be integrated into one constituent element, or one constituent element can be divided into two or more constituent elements, as necessary. In addition, the functions performed in each block are for explaining the embodiments of the present application, and the specific operations or devices thereof do not limit the scope of the claims of the present application.

[0098] Figure 2 is an exploded view of the display device 100 of an embodiment of the present application. Figure 3 is an exploded view of the micro LED module 300 of an embodiment of the present application, Figure 4 is a side view of the micro LED module 300 of an embodiment of the present application.

[0099] First, referring to Figure 3 and Figure 4 , the micro LED module 300 of an embodiment of the present application can include a unit substrate 310, a plurality of micro LED chips 320, a protective film 330, a black film 340, and an optical substance 350.

[0100] The unit substrate 310 can be a flexible substrate. For example, in order to realize a flexible display device 100, the unit substrate 310 can contain glass or polyimide (PI). In addition thereto, a material having insulating properties and having flexibility, for example, any one of polyethylene naphthalate (PEN) and polyethylene terephthalate (PET), etc., can be used. In addition, the unit substrate 310 can be formed of any one of a transparent material or an opaque material.

[0101] The plurality of micro LED chips 320 can be mounted on the top surface of the unit substrate 310. The micro LED chip 320 can include a plurality of pixels arranged in the lateral direction (x-axis direction) or the longitudinal direction (y-axis direction) of the unit substrate 310. For example, the plurality of pixels can include red (hereinafter, "R") pixels (320R), green (hereinafter, "G") pixels (320G), and blue (hereinafter, "B") pixels (320B). Also, the R pixels (320R), the G pixels (320G), and the B pixels (320B) can constitute one micro LED chip 320. In addition, the micro LED chip 320 of the present application can further include white (hereinafter, "W") pixels.

[0102] The micro LED module 300 of an embodiment of the present application can be provided with a protective film 330 that covers the unit substrate 310 and the plurality of micro LED chips 320 mounted on the top surface of the unit substrate 310. The protective film 330 can be coated to cover the plurality of micro LED chips 320 that emit light.

[0103] And, a black film 340 can be provided on the top surface of the protective film 330. The black film 340 can play a role of enhancing the black color characteristic in the light emitted by the micro LED chip 320 of the micro LED module 300 according to an embodiment of the present application. In addition, when the power of the display device 100 according to the present application is turned off, a visual dark field effect can be obtained. Furthermore, a role of improving the straightness of the light emitted by the micro LED chip 320 can be played to improve the bright line that can occur at the boundary portion between the micro LED modules 300 to be described below.

[0104] And, the micro LED module 300 according to the present application can include an optical substance 350 provided on the top surface of the black film 340. The optical substance 350 can include a high molecular substance of a transparent material. The high molecular substance can have a refractive index of at least 1.3 or more, and the thickness t of the high molecular substance can be at least 5 micrometers (μm) or more. Thus, the bright line that can occur at the boundary portion between the plurality of micro LED modules 300 to be described below can be improved.

[0105] And, the optical substance 350 provided on the top surface of the black film 340 can provide a structural stability of the micro LED module 300 and an effect of improving the image quality. The optical substance 350 provided on the top surface of the black film 340 formed in a micrometer (μm) unit thickness can prevent the black film 340 from being peeled off or damaged, thereby providing the above-mentioned effects.

[0106] That is, as described above, since the black film 340 can play a role of improving the black color characteristic in the light emitted by the micro LED chip 320 and a visual dark field effect, in the case where the black film 340 is peeled off or damaged, the above-mentioned roles cannot be played. If so, a difference in luminance can be partially generated, and a spot can occur on the screen, which results in a decrease in image quality.

[0107] Therefore, the optical substance 350 provided on the top surface of the black film 340 forms a layer for protecting the black film 340, thereby solving the problem of the decrease in image quality due to the damage of the black film 340.

[0108] And, in the micro LED module 300 according to an embodiment of the present application, the high molecular substance of a transparent material can include at least one of polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE), ethylene-vinyl acetate copolymer (EVA), polyimide (PI), epoxy, acrylic, and silicon.

[0109] Moreover, the high molecular substance of the present application can include other high molecular substances, resin substances, or copolymers thereof, which have similar properties to the high molecular substance. That is, the high molecular substance of the present application can include all high molecular substances having the properties of being transparent, permeable to light, and having a refractive index greater than that of air.

[0110] Figure 2 As an exploded view of the display device 100 according to an embodiment of the present application, the display device 100 according to an embodiment of the present application can include a setting bracket 360, and a plurality of micro LED modules 300 tiled in a grid shape on the setting bracket 360.

[0111] The number of the plurality of micro LED modules 300 is not limited to Figure 2 the number shown in the drawing, and can be arranged from several to several hundred to constitute the display device 100 according to the present application.

[0112] Also, the setting bracket 360 can function to support the plurality of micro LED modules 300 tiled in a grid shape. In addition, the setting bracket 360 according to an embodiment of the present application can be implemented as a frame assembly. That is, in order to support the plurality of micro LED modules 300 which can be arranged in various numbers, it can also be formed by assembling a plurality of frames.

[0113] Also, the micro LED module 300 can include a unit substrate 310, a plurality of micro LED chips 320 mounted on a top surface of the unit substrate 310, a protective film 330 covering the top surface of the unit substrate 310 and the plurality of micro LED chips 320, a black film 340 disposed on a top surface of the protective film 330, and an optical film 350 disposed on a top surface of the black film 340.

[0114] Figures 5 to 8 is a view for explaining that a bright line is improved by the micro LED module 300 according to an embodiment of the present application in Figure 2 A-A' of FIG. 1.

[0115] Figure 5 is a view showing an embodiment in which a gap is not formed in a boundary portion between the micro LED modules 300. Referring to Figure 2 In the case where the display device 100 according to an embodiment of the present application arranges the plurality of micro LED modules 300, it is preferable that a gap is not formed in a boundary portion between the micro LED modules 300.

[0116] However, during the manufacturing process, gaps may occur at the boundary portions between the micro-LED modules 300. In this case, as described above, light emitted from the micro-LED chip 320 leaks through the gaps, resulting in a bright line problem where only the boundary portions between the micro-LED modules 300 appear bright. Therefore, the following describes a solution for improving the bright line problem using the micro-LED module 300 of this invention.

[0117] first, Figure 6 This is a diagram illustrating an embodiment of improving the bright line when a spacing d1 is generated at the boundary portion between micro LED modules 300. Figure 6 (a) is used to illustrate the problem of bright lines without the optical material 350 of this invention. Figure 6 (b) is used to illustrate the improvement of the bright line of the micro-LED module 300 provided with the optical material 350 of this invention.

[0118] like Figure 6 As shown in (a), without the optical material 350 of this invention, light emitted from the micro LED chip 320 leaks through the gap d1, thereby producing a bright line corresponding to the L1 region.

[0119] At this time, since the refractive index of air in the air layer on the top surface of the black film 340 is 1, the light emitted from the micro LED chip 320 travels straight without refraction, thus producing a bright line equivalent to the L1 region.

[0120] On the contrary, such as Figure 6 As shown in (b), when a micro-LED module 300 with optical material 350 is provided on the top surface of the black film 340, even if the light emitted by the micro-LED chip 320 leaks through the gap d1, only a bright line equivalent to the L2 and L3 regions is generated that is shorter than the L1 region.

[0121] In particular, since the optical material 350 of this invention includes a polymeric material with a refractive index of at least 1.3, which is greater than that of air, light incident on the optical material 350 is refracted by the polymeric material with the high refractive index of this invention, thereby propagating into the L3 region.

[0122] At this time, because the intensity of light weakens as it passes through the optical material 350, the light intensity in region L3 formed by the light passing through the optical material 350 is weaker than that in region L2. As a result, it is possible to achieve a lower intensity light than when the optical material 350 is not present. Figure 6 (a) significantly improves bright lines.

[0123] In the above, although the greater the refractive index, the shorter the L3 region is formed, thereby being able to improve the effect of bright line improvement. However, if the refractive index is too large, the phenomenon of light distortion through the optical substance 350 can occur. Therefore, the refractive index of the polymer substance of the present application can have a refractive index of at least 1.3 or more, and preferably, the refractive index can be 1.3 or more and 1.6 or less.

[0124] In addition, referring to Figure 4 , the thickness t of the optical substance 350 can be set to a thickness of at least 5 micrometers (μm) or more. If the thickness t of the optical substance 350 is formed too thin, damage to the optical substance 350 can occur, and thus the thickness t of the optical substance 350 is preferably set to a thickness of at least 5 micrometers (μm) or more.

[0125] Further, the thicker the thickness t of the optical substance 350, in Figure 6 (b), the shorter the L2 and L3 regions are formed, and the intensity of light passing through the optical substance 350 can be further weakened, thereby being able to improve the effect of bright line improvement. However, if the thickness t of the optical substance 350 is formed too thick, the light transmittance is low, thereby possibly causing a decrease in clarity. Therefore, considering bright line improvement and clarity, the thickness t of the optical substance 350 is preferably set to an appropriate thickness on the top surface of the black film 340.

[0126] Figure 7 is a diagram for explaining an embodiment of improving a bright line in a case where a height difference h1 occurs at a boundary portion between the micro LED modules 300. Figure 7 (a) of FIG. 1 is for explaining a bright line problem in a case where the optical substance 350 of the present application is not provided, Figure 7 (b) of FIG. 1 is for explaining bright line improvement of the micro LED module 300 provided with the optical substance 350 of the present application.

[0127] As shown in Figure 7 (a), in a case where the optical substance 350 of the present application is not provided, light emitted by the micro LED chip 320 is leaked due to the height difference h1, and thus a bright line corresponding to an L4 region can occur.

[0128] On the contrary, as shown in Figure 7 (b), in a case where the optical substance 350 is provided on the top surface of the black film 340 of the micro LED module 300, light emitted by the micro LED chip 32 is refracted by being incident into the optical substance 350, and a bright line corresponding to an L5 region shorter than the L4 region can occur.

[0129] Furthermore, as described above, if the light passes through the optical substance 350, the intensity of the light is weakened, and thus the effect of bright line improvement can be greater thanFigure 7 Further, if the thickness t of the optical substance 350 is set to an appropriate thickness of at least 5 micrometers (μm) or more on the top surface of the black film 340, the effect of improving the bright line can be further improved.

[0130] Figure 8 is a drawing for explaining an embodiment of improving the bright line in a case where the boundary portion between the micro LED modules 300 entirely has the pitch d2 and the height difference h2. Figure 8 (a) of FIG. 1 is for explaining the bright line problem in a case where the optical substance 350 of the present application is not provided, Figure 8 (b) of FIG. 1 is for explaining the bright line improvement of the micro LED module 300 provided with the optical substance 350 of the present application.

[0131] As shown in (a) of FIG. 1, in a case where the optical substance 350 of the present application is not provided, the light emitted through the micro LED chip 320 is leaked due to the pitch d2 and the height difference h2, and a bright line corresponding to the L6 region is generated. Figure 8

[0132] On the contrary, as shown in (b) of FIG. 1, in a case of the micro LED module 300 provided with the optical substance 350 on the top surface of the black film 340, even if the light emitted through the micro LED chip 320 is leaked due to the pitch d2 and the height difference h2, a bright line is generated only in the L7 and L8 regions corresponding to the L6 region. Figure 8

[0133] Further, as described above, the light passing through the optical substance 350 is weak in intensity, and thus the light of the L8 region generated by the light passing through the optical substance 350 is weak in intensity, and as a result, the bright line improvement effect of (a) of FIG. 1 can be significantly improved. In addition, if the thickness t of the optical substance 350 is set to an appropriate thickness of at least 5 micrometers (μm) or more on the top surface of the black film 340, the effect of improving the bright line can be further improved. Figure 8

[0134] That is, the micro LED module 300 of the present application and the display device 100 provided with the same can prevent the phenomenon that only the boundary portion between the micro LED modules 300 appears bright by improving the bright line problem that can occur in the process of arranging a plurality of micro LED modules 300, thereby improving the bright line.

[0135] The above detailed description should not be construed as limiting in all respects, but should be understood as exemplary. The scope of the present application should be determined by a reasonable interpretation of the appended claims, and all modifications within the scope of equivalents of the present application fall within the scope of the present application.​​​

Claims

1. A micro-LED module, characterized by, The micro LED module comprises: a unit substrate; a plurality of micro LED chips mounted on a top surface of the unit substrate; a protective film covering the top surface of the unit substrate and the plurality of micro LED chips; a black film disposed on a top surface of the protective film; and an optical substance disposed on a top surface of the black film, the optical substance comprising a high molecular substance of a transparent material.

2. The micro LED module according to claim 1, wherein the high molecular substance has a refractive index of at least 1.3 or more.

3. The micro LED module according to claim 1, wherein the high molecular substance has a thickness of at least 5 micrometers or more.

4. The micro LED module according to claim 1, wherein the high molecular substance comprises at least one of polyethylene terephthalate, polypropylene, polyethylene, ethylene-vinyl acetate copolymer, polyimide, epoxy resin, acrylic resin, and silicone resin. The display device comprises:

5. A display device, characterized by comprising: a setting bracket; and a plurality of micro LED modules tiled in a grid shape on the setting bracket, the micro LED module comprising: a unit substrate; a plurality of micro LED chips mounted on a top surface of the unit substrate; a protective film covering the top surface of the unit substrate and the plurality of micro LED chips; a black film disposed on a top surface of the protective film; and an optical substance disposed on a top surface of the black film, the optical substance comprising a high molecular substance of a transparent material.

6. The display device according to claim 5, wherein the high molecular substance has a refractive index of at least 1.3 or more.

7. The display device according to claim 5, wherein the high molecular substance has a thickness of at least 5 micrometers or more.

8. The display device according to claim 5, wherein the high molecular substance comprises at least one of polyethylene terephthalate, polypropylene, polyethylene, ethylene-vinyl acetate copolymer, polyimide, epoxy resin, acrylic resin, and silicone resin. ​ ​

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