WO2021141407A1 - 표시 장치 - Google Patents
표시 장치 Download PDFInfo
- Publication number
- WO2021141407A1 WO2021141407A1 PCT/KR2021/000192 KR2021000192W WO2021141407A1 WO 2021141407 A1 WO2021141407 A1 WO 2021141407A1 KR 2021000192 W KR2021000192 W KR 2021000192W WO 2021141407 A1 WO2021141407 A1 WO 2021141407A1
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- WIPO (PCT)
- Prior art keywords
- module
- module substrate
- light emitting
- substrate
- depression
- Prior art date
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Classifications
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- G—PHYSICS
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- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- G09F9/3026—Video wall, i.e. stackable semiconductor matrix display modules
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- H01L27/153—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars
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Definitions
- the present invention relates to a display device, and more particularly, to a large-area multi-module display device.
- a display device using a light emitting diode is obtained by forming structures of red (Red, R), green (Green, G), and blue (Blue, B) light emitting diodes (LEDs) individually grown on a final substrate.
- the present invention provides a high-quality large-area multi-module display device and a manufacturing method thereof.
- a display device includes a module substrate, a plurality of display modules each including a plurality of light emitting devices mounted on the module substrate, and a support substrate on which the plurality of display modules are disposed. . At least one end of each of the module substrates is provided with a depression recessed from the end of the module substrate and connection electrodes provided in the depression, and the light emitting devices are electrically connected to wires on the support substrate through the connection electrodes. Connected.
- first and second module substrates when two module substrates adjacent to each other among the module substrates are referred to as first and second module substrates, at least one of the first and second module substrates has a plurality of at least one end portion. It may have depressions, and at least one of the first and second module substrates may have protrusions protruding in the direction of the depressions at positions corresponding to the plurality of depressions at at least one end thereof.
- the recessed portion may have a shape of a triangle, a semicircle, or a semiellipse when viewed in a plan view.
- each of the first and second module substrates may have the depressions and the protrusions at at least one end.
- each of the connection electrodes may fill the depression.
- the display device further includes a protective material protecting the depressions at one end of the first and second module substrates, and the connection electrode may be provided between the surfaces of the depressions and the protective material. have.
- connection wiring provided on the upper surface of the module substrate and connected to the connection electrode
- rear connection wiring provided on the lower surface of the module substrate and connected to the connection electrode
- the wiring may be connected to the support substrate using a ball grid array (BGA) method or a conductive adhesive member.
- BGA ball grid array
- the support substrate may have a conductive electrode portion provided on a surface facing the module substrate, and the connection electrode may contact the conductive electrode portion through the rear connection wiring.
- connection electrodes may be provided in a number corresponding to the light emitting devices to drive the light emitting devices.
- the module substrate includes a pixel region in which the light emitting elements are provided to display an image and a non-pixel region surrounding the pixel region, and some or all of the connection wires are in the pixel region.
- the depression may be provided in the non-pixel area. In one embodiment of the present invention, the depressions may be disposed along the edge of the module substrate.
- a display device may include manufacturing a plurality of display modules and providing the plurality of display modules on a support substrate.
- the manufacturing of each of the plurality of display modules may include forming a depression in at least one end of a module substrate, forming connection electrodes in the depression, forming light emitting devices on the module substrate, and the The method may include forming a driving circuit part on a lower surface of the module substrate and electrically connecting the light emitting devices and the driving circuit part through the connection electrodes.
- the depression may be formed by using a laser or by cutting using a mechanism such as a saw tooth.
- the forming of the connection electrodes comprises: forming a conductive film on at least one end side surface of the module substrate on which the recessed part is formed; and polishing at least one end side of the module substrate to form the recessed part It may include removing the conductive film formed on the side of one end except for the step.
- the step of forming a depression in at least one end of the module substrate and forming the connection electrodes in the depression includes disposing a plurality of module substrates adjacent to each other and then a plurality of module substrates can be performed at the same time.
- the method of manufacturing a display device may further include forming connection wires and rear connection wires, respectively, on an upper surface and a lower surface of the module substrate.
- the method of manufacturing a display device may further include forming a protrusion on at least one end of the module substrate.
- the protrusion when the plurality of display modules are provided on the support substrate, the protrusion may be disposed to correspond to a position corresponding to the depression.
- a large-area display device in which problems such as image separation or dark lines appearing on the image are minimized.
- FIG. 1 is a perspective view schematically illustrating a display device according to an exemplary embodiment.
- FIG. 2 is a plan view illustrating a portion corresponding to P1 of FIG. 1 .
- FIG. 3 is a perspective view conceptually illustrating an edge of a display module of a display device according to an exemplary embodiment.
- 4A and 4B are cross-sectional views taken along line A-A' of FIG. 3 , respectively, illustrating embodiments according to an embodiment of the present invention.
- FIG. 5 is a cross-sectional view schematically illustrating a light emitting device according to an embodiment of the present invention.
- FIG. 6 schematically illustrates a connection relationship on the rear surface of a display device according to an exemplary embodiment when a driving circuit unit is provided separately on a lower surface of a module substrate.
- FIG. 7A to 7D are plan views sequentially illustrating a method of manufacturing a display device according to an exemplary embodiment.
- FIG. 8 is a perspective view conceptually illustrating assembling a display module to a support substrate.
- FIG. 9 is a perspective view conceptually illustrating the simultaneous formation of depressions in a plurality of module substrates.
- FIG. 10 is a plan view each showing the shape of the depression according to an embodiment of the present invention.
- connection electrode 11 is a plan view illustrating a shape of a connection electrode according to an embodiment of the present invention.
- 12A to 12C are plan views illustrating a relationship between two display modules adjacent to each other according to an embodiment of the present invention.
- FIG. 13 is a structural diagram illustrating a display device according to an exemplary embodiment.
- FIG. 14 is a plan view illustrating that light emitting devices are arranged in a form different from that of the above-described embodiment, according to an embodiment of the present invention, and shows a portion corresponding to P1 of FIG. 1 .
- FIG. 15A is a plan view illustrating that the light emitting devices are arranged in another form from the above-described embodiment, in an embodiment of the present invention, and shows a portion corresponding to P1 of FIG. 1 , and FIG. 15B is shown in FIG. 15A. It is a conceptual diagram simply illustrating the illustrated light emitting device.
- FIG. 16A is a plan view illustrating a part of a display module according to an embodiment of the present invention, in which a fixing member is provided between module substrates adjacent to each other, and FIGS. 16B and 16C are B-B' of FIG. 16A. Cross-sectional views taken along lines illustrate embodiments of the present invention.
- the present invention relates to a display device including a pixel.
- a display device including a pixel.
- the display device of the present invention when light emitting elements are used as pixels for displaying an image, they may be used as the display device.
- the display device includes a television, tablet, e-book display device, computer monitor, kiosk, digital camera, game console, mobile phone, PDA, vehicle display, large outdoor/indoor electric signboard, and the like.
- a display device includes a micro light emitting device.
- a micro light emitting device may be a device having a width or length on a scale of from about 1 micrometer to about 800 micrometers, or from about 1 micrometer to about 500 micrometers, or from about 10 micrometers to about 300 micrometers.
- the micro light emitting devices according to an embodiment of the present invention do not necessarily have a width or a length within the above range, and may have a smaller or larger size as needed.
- all micro light emitting devices are referred to as "light emitting devices”.
- FIG. 1 is a perspective view schematically illustrating a display device according to an exemplary embodiment.
- FIG. 2 is a plan view illustrating a portion corresponding to P1 of FIG. 1 .
- FIG. 3 is a perspective view conceptually illustrating an edge of a display module of a display device according to an exemplary embodiment.
- 4A and 4B are cross-sectional views taken along line A-A' of FIG. 3 , respectively, illustrating embodiments according to an embodiment of the present invention.
- a display device 100 includes a support substrate 160 and a plurality of display modules disposed on the support substrate 160 . (110).
- Each display module 110 has a pixel area 111 on which an image is displayed, and may be disposed along rows and columns on the support substrate 160 . At least one pixel, preferably a plurality of pixels, may be formed in the pixel region 111 of the display module 110 .
- the support substrate 160 is formed with the wiring unit and the light emitting devices 130 , and may be provided as rigid or flexible.
- the support substrate 160 may have a larger area than the individual display modules 110 , and thus a plurality of display modules 110 may be mounted on the support substrate 160 .
- the display device 100 having a large display screen can be implemented by combining a plurality of display modules 110 .
- the support substrate 160 may be, for example, glass, quartz, ceramic, Si, SiC, metal, fiber, polymer, or the like, and may be a transparent or opaque substrate.
- the support substrate 160 may be a rigid or flexible printed circuit board (PCB).
- the support substrate 160 may be a transparent substrate such as glass, quartz, transparent ceramic, or transparent PCB.
- the wiring portion on the support substrate 160 may also be formed of a transparent film such as a transparent conductive oxide film.
- the support substrate 160 is a transparent substrate, the background may be observed through the support substrate 160 before the display device is turned on.
- the display screen may be hardly observed while the display device is turned off and the wall surface may be observed. Since the light emitting devices 130 have a very small size, a background may be observed through the area between the light emitting devices 130 . Accordingly, a transparent display device such as, for example, a head-up display can be provided.
- the support substrate 160 is formed of flexible plastic, a flexible display may be implemented.
- Each of the display modules 110 includes a module substrate 120 and a plurality of light emitting devices 130 mounted on an upper surface of the module substrate 120 .
- the module substrate 120 of each of the display modules 110 may be made of various materials.
- the module substrate 120 may be formed of a light-transmitting insulating material.
- the meaning that the module substrate 120 has “light transmittance” includes not only a transparent case that transmits all light, but also a translucent or partially transparent case such as transmitting only light of a predetermined wavelength or only a portion of light of a small wavelength.
- the material of the module substrate 120 may include glass, quartz, an organic polymer, an organic-inorganic composite material, and the like.
- the material of the module substrate 120 is not limited thereto, and is not particularly limited as long as it has light transmittance and insulating properties.
- the module substrate 120 includes at least one pixel region 111 and a non-pixel region surrounding the pixel region 111 .
- the pixel area 111 is an area in which pixels are provided, and corresponds to an area in which light emitted from the light emitting device 130 to be described later proceeds and is visually recognized by a user.
- the non-pixel area is an area except for the pixel area 111 .
- the non-pixel area is provided on at least one side of the pixel area 111 , and in an embodiment of the present invention is provided to surround the pixel area 111 .
- At least one light emitting device 130 is provided in the pixel area 111 .
- a plurality of light emitting devices 130 are provided in the pixel area 111 as an example.
- the pixel unit 113 is a minimum unit for displaying an image.
- Each pixel unit 113 may emit white light and/or color light.
- Each pixel 113 unit may include one pixel emitting one color, but may include a plurality of different pixels so that different colors can be combined to emit white light and/or colored light.
- each display module 110 may include first to third pixels.
- each pixel unit 113 may include first to third pixels.
- the first to third pixels may be implemented as first to third light emitting devices 130a, 130b, and 130c. That is, if the light emitted from the first to third pixels is referred to as first to third light, respectively, the first to third light may have different wavelength bands.
- the first to third lights may correspond to blue, red, and green wavelength bands.
- the wavelength band of the light emitted by the pixels included in each display module 110 is not limited thereto, and may correspond to cyan, magenta, and yellow wavelength bands.
- the light emitting devices 130 may be provided for each pixel to provide light of various wavelengths.
- the light emitting devices 130 include first to third light emitting devices 130a, 130b, and 130c that emit green, red, and blue wavelength bands as first to third light, respectively. may include.
- the first to third light emitting devices 130a, 130b, and 130c may be implemented as blue light emitting diodes, red light emitting diodes, and green light emitting diodes.
- the first to third lights do not need to have wavelength bands of blue, red, and green, respectively.
- the light conversion layer may include a material such as a phosphor or quantum dot that converts light of a predetermined wavelength into light of another wavelength.
- a material such as a phosphor or quantum dot that converts light of a predetermined wavelength into light of another wavelength.
- red, and/or blue, green, red, and blue light emitting diodes are not necessarily used, and light emitting diodes other than the above colors may be used.
- red a red light emitting diode may be used, but a blue or ultraviolet light emitting diode may be used, and a light conversion layer emitting red after absorbing blue light or ultraviolet light may be used.
- the light emitting devices 130 are formed in a fine size, they may be mounted on a flexible module substrate such as plastic by a method such as transfer.
- the light emitting device 130 according to an embodiment of the present invention may be an inorganic light emitting device, and unlike an organic light emitting device, it may be formed by growing an inorganic material as a thin film. Accordingly, the manufacturing process may be simple and the yield may be improved.
- the individually separated light emitting devices 130 can be simultaneously transferred onto a large-area substrate, a large-area display device can be manufactured.
- the light emitting device made of an inorganic material has advantages of high luminance, long lifespan, and low cost due to the organic light emitting device.
- a recessed portion 127 is formed on a side surface of the module substrate 120 , and a connection electrode 123 is provided in the recessed portion 127 .
- the recessed portion 127 is recessed inward from the side surface of the module substrate 120 and may have a groove shape extending from the upper surface to the lower surface of the module substrate 120 by removing a portion of the module substrate 120 .
- a connection electrode 123 is provided on the side surface of the module substrate 120 forming the inside of the recessed portion 127 .
- An upper pad 123a connected to the side electrode 123b is provided on an upper surface of the module substrate 120
- a lower pad 123c connected to the side electrode 123b is provided on a lower surface of the module substrate 120 .
- the upper pad 123a is connected to contact with the connection wiring 129 or is formed integrally with the connection wiring 129
- the connection wiring 129 is electrically connected to the light emitting device 130 .
- the lower pad 123c is connected to contact the lower connection line 159 or is integrally formed with the lower connection line 159 and is electrically connected to the driving circuit unit or the support substrate.
- the connection wiring 129 and the lower connection wiring 159 may include a data line and/or a scan line.
- Wires formed on the lower surface of the module substrate 120 may be connected to a separate driving circuit unit 150 .
- the driving circuit unit 150 may be manufactured as a separate printed circuit board and disposed on the lower surface of the module board 120 , and then connected to wires formed on the lower surface of the module board 120 . have.
- Each wiring formed on the upper surface of the module substrate 120 may be connected to the wirings formed on the lower surface of the module substrate 120 through a connection electrode 123 formed in the depression 127 to be described later.
- only the driving circuit unit 150 is manufactured as a separate printed circuit board and disposed on the lower surface of the module substrate 120, but the present invention is not limited thereto, and a separate additional driving circuit unit is provided. More may be provided. An additional driving circuit unit may be provided on the support substrate 160 together with a separate wiring. For example, referring to FIG. 4B , wirings formed on the lower surface of the module substrate 120 may be connected to the support substrate 160 .
- a driving element for driving the light emitting elements 130 as well as a plurality of wires may be formed on the module substrate 120 .
- the driving element may be a thin film transistor, and each thin film transistor may be connected to each light emitting element 130 according to a driving signal from the outside, thereby turning each light emitting element 130 on or off.
- first to third light emitting devices 130a, 130b, and 130c may be employed as the first to third light emitting devices 130a, 130b, and 130c.
- FIG. 5 is a cross-sectional view schematically illustrating a light emitting device 130 according to an embodiment of the present invention.
- the light emitting device 130 illustrated in FIG. 3 may be any one of the first to third light emitting devices 130a, 130b, and 130c.
- the light emitting device includes a device substrate 131 , a first semiconductor layer 132 , an active layer 133 , a second semiconductor layer 134 , a first contact electrode 135a , and a second contact electrode 135b . ), an insulating layer 136 , a first contact pad 137a , and a second contact pad 137b .
- the first semiconductor layer 132 , the active layer 133 , and the second semiconductor layer 134 may include indium gallium nitride (InGaN), gallium nitride (GaN), aluminum indium gallium nitride (AlInGaN), gallium phosphide (GaP), aluminum gallium indium phosphide (AlGaInP), and aluminum gallium phosphide (AlGaP).
- InGaN indium gallium nitride
- GaN gallium nitride
- AlInGaN aluminum indium gallium nitride
- GaP gallium phosphide
- AlGaInP aluminum gallium indium phosphide
- AlGaP aluminum gallium phosphide
- the first semiconductor layer 132 , the active layer 133 , and the second semiconductor layer 134 may include gallium arsenide (AlGaAs), gallium arsenide phosphide. (gallium arsenide phosphide, GaAsP), aluminum gallium indium phosphide (AlGaInP), and gallium phosphide (GaP).
- AlGaAs gallium arsenide
- GaAsP gallium arsenide phosphide
- AlGaInP aluminum gallium indium phosphide
- GaP gallium phosphide
- the first semiconductor layer 132 , the active layer 133 , and the second semiconductor layer 134 may include gallium nitride (GaN), indium gallium nitride (InGaN), It may include aluminum indium gallium nitride (AlInGaN), and zinc selenide (ZnSe).
- GaN gallium nitride
- InGaN indium gallium nitride
- AlInGaN aluminum indium gallium nitride
- ZnSe zinc selenide
- the first and second semiconductor layers 132 and 134 may be doped with impurities of opposite types, respectively, and may be n-type or p-type semiconductor layers depending on the type of impurities.
- the first semiconductor layer 132 may be an n-type semiconductor layer and the second semiconductor layer 134 may be a p-type semiconductor layer.
- the first semiconductor layer 132 may be a p-type semiconductor layer and the second semiconductor layer 134 may be an n-type semiconductor layer.
- first semiconductor layer 132 and the second semiconductor layer 134 are each a single layer, these layers may be multi-layered and may also include a superlattice layer.
- the active layer 133 may include a single quantum well structure or a multi-quantum well structure, and the composition ratio of the nitride-based semiconductor is adjusted to emit a desired wavelength.
- the first contact electrode 135a is disposed on the first semiconductor layer 132 in which the active layer 133 and the second semiconductor layer 134 are not provided, and the second contact electrode 135b is disposed on the second semiconductor layer 134 . This is placed
- the first and/or second contact electrodes 135a and 135b may be formed of a single layer or a multi-layered metal.
- a material of the first and/or second contact electrodes 135a and 135b may include various metals, such as Al, Ti, Cr, Ni, Au, Ag, Cu, and alloys thereof.
- An insulating layer 136 is provided on the first and second contact electrodes 135a and 135b, and a first contact pad 137a and a second contact connected to the first contact electrode 135a through a contact hole on the insulating layer 136.
- a pad 137b is provided.
- the first contact pad 137a is connected to the first contact electrode 135a and the second contact pad 137b is connected to the second contact electrode 135b, but this is for convenience of description. for, but not limited thereto.
- the second contact pad 137b may be connected to the first contact electrode 135a and the first contact pad 137a may be connected to the second contact electrode 135b.
- the first contact pad 137a and/or the second contact pad 137b may be formed of a single layer or a multi-layered metal.
- metals such as Al, Ti, Cr, Ni, Au, and alloys thereof may be used.
- the light emitting device 130 may further include a layer having an additional function in addition to the above-described layer.
- various layers may be further included, such as a reflective layer that reflects light, an additional insulating layer for insulating a specific component, a solder prevention layer for preventing the diffusion of solder, and the like.
- the light emitting device is shown with the first and second contact pads facing upward, but is reversed when mounted on the module substrate so that the first and second contact pads face the upper surface of the module substrate. can be mounted.
- the first and second contact pads may be electrically connected to a wiring unit provided on the module substrate directly or by using a conductive adhesive member.
- the display device 100 emits light by being turned on by applying a common voltage and a data signal to the light emitting device 130 . and the emitted light travels toward the lower surface of the module substrate 120 through the lower module substrate 120 .
- the display modules 110 have a structure connected to a wiring portion formed on the support substrate 160 , in particular, the conductive electrode portion 163 .
- Various types of wiring units and circuits eg, various circuits for driving each pixel including an additional driver
- the conductive electrode unit 163 may be provided on the support substrate 160 .
- a driving signal is provided to the light emitting devices 130 disposed on the display modules 110 .
- the module substrate 120 of the display module 110 is provided with a structure for connecting the conductive electrode part 163 of the support substrate 160 and the connection wiring 129 on the upper surface of the module substrate 120 .
- the display modules 110 include the light emitting devices 130 provided on the upper surface of the module substrate 120 , the driving unit 150 or the supporting substrate 160 positioned below the module substrate 120 . It has a connection structure for connecting to
- each of the module substrates 120 is provided with depressions 127 recessed from the end of the module substrate 120 .
- the recessed portion 127 may be provided in the non-pixel area instead of the pixel area 111 , and thus is disposed along the edge of the module substrate 120 .
- the recessed portion 127 may be provided in a number capable of connecting the number of light emitting elements 130 and the connection wiring 129 connected to the light emitting elements 130, and in the drawings, any number for convenience of description was shown as
- Each of the depressions 127 is formed in a shape cut from the upper surface to the lower surface of the module substrate 120 at both ends of the module substrate 120 .
- Connection electrodes 123 are formed in each of the depressions 127 .
- Each connection electrode 123 corresponds to the upper pad 123a formed on the upper surface of the module substrate 120 , the lower pad 123c formed on the lower surface of the module substrate 120 , and the interior of the recessed portion 127 , and is an upper pad. It consists of a side electrode 123b connecting the 123a and the lower pad 123c.
- the upper pad 123a is connected to the connection wiring 129 formed on the upper surface of the module substrate 120
- the lower pad 123c is connected to or supported by the lower connection wiring 159 formed on the lower surface of the module substrate 120 . It may be connected to the conductive electrode part 163 of the substrate 160 .
- the lower pad 123c is the lower surface of the module substrate 120 . It is connected to the driving circuit unit 150 by the connection wiring 129 provided in the .
- FIG. 6 schematically illustrates a connection relationship on the rear surface of the display device 100 according to an exemplary embodiment when the driving circuit unit 150 is separately provided on the lower surface of the module substrate 120 .
- the driving circuit unit 150 may be provided in a single number, but may be provided in two or more as illustrated.
- the driving circuit unit 150 may include a first driving circuit unit 151 and a second driving circuit unit 153 .
- the first and second driving circuit units 151 and 153 are electrically connected to the lower pad 123c of the connecting electrode 123 through the lower connecting wire 159 formed on the lower surface of the module substrate 120 .
- the first driving circuit unit 151 and the second driving circuit unit 153 may be, for example, a scan driving unit and a data driving unit.
- the first driving circuit unit 151 and the second driving circuit unit 153 may be provided in the pixel region 111 and/or the region corresponding to the non-pixel region.
- the lower pad 123c is connected to the conductive electrode unit 163 on the support substrate 160 .
- a conductive adhesive member 140 such as solder paste is provided between the lower pad 123c and the conductive electrode part 163 .
- solder paste is provided between the lower pad 123c and the conductive electrode part 163 .
- it may be connected in a ball grid array manner. In this case, a solder ball may be provided between the lower pad 123c and the conductive electrode part 163 of the support substrate 160 .
- the support substrate 160 includes various devices, for example, a timing controller, a memory such as an EEPROM, a circuit such as a voltage source for driving the light emitting device 130 , and various wirings electrically connected to the conductive electrode unit 163 .
- a wiring unit including the may be formed.
- a gate driver and a data driver for applying a scan signal and an image signal to a scan line and a data line, respectively, may be formed on the support substrate 160 .
- driving signals output from various devices on the driving circuit unit 150 or the support substrate 160 are transmitted to the light emitting device 130 through the connection electrodes 123 , and accordingly, the light emitting device 130 is turned on or turned on. It is turned off and the image is displayed.
- the display device 100 corresponds to a multi-module display device including a plurality of display modules 110 as described above.
- 4x5 display modules 110 constitute one display device 100 .
- each or at least some of the plurality of display modules 110 may be driven independently, or at least some of the display modules 110 are dependent on the other display modules 110 in conjunction with the other display modules 110 .
- the plurality of display modules 110 are all provided in the same size, but the present invention is not limited thereto, and at least one display module may be provided in a size different from that of the other display modules. Of course it could be. Also, at least one display module may have a different number of pixels from the other display modules, and thus resolution may also have different values. In addition, when the resolution of all regions does not need to be the same, the display device 100 may be manufactured by arranging display modules having different resolutions.
- each display module 110 may be provided in a shape other than a rectangular shape, and in particular, may be provided in a shape other than a rectangular shape depending on the overall shape of the display device 100 .
- the support substrate 160 or the number of display modules 110 disposed on the support substrate 160 may vary depending on the size of the display device 100 to be manufactured.
- connection electrode may be formed on the side of the module substrate on which the light emitting devices are mounted, particularly in the non-pixel region immediately adjacent to the pixel region.
- the portion where the connection electrode is formed corresponds to a portion recessed inwardly from one end of the module substrate, and thus there is no need to have an additional wiring structure on the outside of the module substrate.
- a separate device for connecting the display module and the support substrate does not need to be provided on the side surface of the module substrate, and thus a space for mounting the separate device on the side surface of the module substrate is omitted, so that adjacent devices are adjacent to each other. A gap between the two display modules may be minimized.
- FIG. 7A to 7D are plan views sequentially illustrating a method of manufacturing a display device according to an exemplary embodiment.
- a plurality of display modules 110 are first manufactured, and then the plurality of display modules 110 are formed on a support substrate 160 . It can be prepared by placing it on
- the module substrate may be formed of a light-transmissive insulating material.
- At least one end of the module substrate 120 has a side portion of the module substrate 120 removed to form a recessed portion 127 .
- the depression 127 may be formed by using a laser or by cutting using a tool such as a saw tooth.
- the method of forming the recessed portion 127 is not limited thereto, and may be formed by various methods.
- a conductive film CDT is formed on the side surface of the module substrate 120 .
- the conductive layer CDT may be formed on the entire side surface of the module substrate 120 on which the depression 127 is formed.
- the conductive layer CDT may be easily formed through plating.
- the method of forming the conductive film CDT is not limited thereto, and as a conductive film may be formed on the side surface of the module substrate 120 , other methods may be used as a matter of course.
- At least one end side surface of the module substrate 120 may be polished.
- the conductive film formed on the side surface of one end excluding the depression 127 is removed by the polishing, and only the conductive film formed in the depression 127 remains, and functions as a connection electrode (particularly, a side connection electrode 123).
- a protective material BM may be formed in the depression 127 in which the connection electrode 123 is formed. Forming the protective material BM in the recessed portion 127 is optional. If necessary, the assembly step of the display module may be performed without protection of the protective material BM.
- the protective material BM may be formed of an insulating material having a black color to absorb light.
- connection wirings and rear connection wirings may be first formed on the upper and lower surfaces of the module substrate before forming the light emitting devices.
- a driving circuit unit is prepared and disposed on a lower surface of the module substrate, and the light emitting devices and the driving circuit unit are electrically connected to each other through the connection electrodes, thereby completing a display module.
- FIG. 8 is a perspective view conceptually illustrating assembling a display module to a support substrate.
- the display modules 110 completed through the above-described steps are disposed on the support substrate 160 and then electrically connected.
- a plurality of display modules 110 may be disposed along rows and columns on the support substrate 160 .
- a conductive adhesive such as solder paste or a solder ball used in a ball grid array is disposed between the display module 110 and the support substrate 160 to electrically connect the display module 110 and the support substrate 160 . have.
- a display module can be manufactured by simply forming a depression in the module substrate and a connection electrode in the depression, and the display module can be attached to the support substrate by simple soldering or a ball grid array method. It is possible to manufacture a multi-module display device in a simple and inexpensive manner.
- the display device according to an embodiment of the present invention may be manufactured by various methods without departing from the concept of the present invention, and may be variously modified in shape and the like.
- each of the depressions when forming the depression in the module substrate, may be individually formed in a single module substrate, but the present invention is not limited thereto, and the depressions may be formed in a plurality of module substrates at the same time. .
- FIG. 9 is a perspective view conceptually illustrating the simultaneous formation of depressions in a plurality of module substrates. In this figure, it is shown that two module substrates are used for convenience of description.
- ends for forming the recessed portion 127 are disposed so as to be positioned on the same side.
- the adhesive sheet 170 may be disposed between the two module substrates 120a and 120b adjacent to each other so that the module substrates 120a and 120b do not move with each other.
- the ends of the plurality of module substrates 120a and 120b are simultaneously cut using a laser or a tool such as a sawtooth to cut the plurality of module substrates 120a , 120b) may be formed with a recessed portion 127 at the end.
- the module substrates 120a and 120b on which the recessed portion 127 is formed may be individually separated from each other by removing the adhesive sheet 170 .
- the depressions can be easily formed in the plurality of module substrates.
- the depression may be formed in various shapes.
- FIG. 10 is a plan view each showing the shape of the depression according to an embodiment of the present invention.
- the shape of the depression 127 may be a triangular shape in plan view, but may be a semicircle or a semiellipse.
- the shape of the recessed portion 127 is not limited thereto, and may be formed in a shape other than this if it is recessed inward from one end of the module substrate 120 .
- the concave portions 127 may all have the same shape, for example, a triangular shape, but are not limited thereto, and various shapes may be used in one module substrate 120 . It can be provided and arranged in various ways.
- the interval between the depressions 127 may be equal, but is not limited thereto, and may be variously adjusted.
- connection electrode may be formed in various shapes.
- connection electrode 11 is a plan view illustrating a shape of a connection electrode according to an embodiment of the present invention.
- connection electrode 123 may be provided to completely fill the depression 127 .
- the connection electrode 123 is shown as a film formed to a predetermined thickness along the side surface of the module substrate 120 constituting the recessed portion 127, but is not limited thereto. Similarly, it may be formed to fill the entire region depressed by the depression 127 and to cover the side surface of the module substrate 120 at the same time. In this case, the connection electrode 123 may be provided to have the same shape as the depression 127 when viewed in a plan view.
- the shape of one end of the display module may be changed into various shapes to facilitate formation of connection electrodes, connection of wires, and assembly to a support substrate.
- 12A to 12C are plan views illustrating a relationship between two display modules adjacent to each other according to an embodiment of the present invention.
- first and second module substrates 120a and 120b When two module groups adjacent to each other among the module substrates on the support substrate are referred to as first and second module substrates 120a and 120b, at least one of the first and second module substrates 120a and 120b is at least one It has a plurality of depressions at the ends, and at least one of the first and second module substrates 120a and 120b may have protrusions protruding in the direction of the depressions at positions corresponding to the plurality of depressions at at least one end. have.
- the second module substrate 120b on the right is depressed inwardly. It may have a portion 127 , and a connection electrode 123 is formed in the depression portion 127 .
- the first module substrate 120a on the left may have a protrusion 127p protruding toward the second module substrate 120b.
- the protrusion 127p of the first module substrate 120a may be provided at a position corresponding to the depression 127 of the second module substrate 120b and have a size corresponding to the size of the depression 127, and thus Accordingly, when assembling the first module substrate 120a and the second module substrate 120b, the first module substrate 120a and the second module substrate 120b may be assembled in a form in which edge shapes are engaged with each other.
- the depression and the protrusion may be variously disposed on the first and second module substrates.
- the first module substrate 120a may have both a protrusion part 127pa and a depression part 127a at an end thereof.
- the recessed portion 127a may be recessed in the inner direction of the first module substrate 120a, and the connection electrode 123a may be disposed in the recessed portion 127a.
- the protrusion 127pa may protrude toward the second module substrate 120b.
- a protrusion 127pb may be formed in a region corresponding to the depression 127a of the first module substrate 120a, and a protrusion 120pa of the first module substrate 120a.
- a depression 127b may be formed in a region corresponding to .
- connection electrode 123b may be disposed in the recessed portion 127b of the second module substrate 120b.
- each of the first and second module substrates 120a and 120b may have the depressions 127a and 127b and the protrusions 127pa and 127pb at at least one end thereof.
- the recessed part 127a of the first module substrate 120a and the recessed part 127b of the second module substrate 120b may be disposed not at positions corresponding to each other but at positions crossing each other.
- the display device having the above-described structure may be driven in various ways.
- the pixels may be driven in a passive type or an active type.
- FIG. 13 is a structural diagram illustrating a display device according to an exemplary embodiment.
- a display device includes a timing controller 155 , a first driver 151 , a second driver 153 , a wiring unit, and first to third light emitting devices ( 130a, 130b, and 130c).
- the first driver 151 and the second driver 153 may be a scan driver and a data driver, respectively. Hereinafter, they will be referred to as a scan driver and a data driver.
- Each pixel is individually connected to the scan driver 151 , the data driver 153 , and the like through wiring units.
- the timing controller 155 receives various control signals and image data necessary for driving the display device from the outside (eg, a system for transmitting image data). The timing controller 155 rearranges the received image data and transmits it to the data driver 153 . In addition, the timing controller 155 generates scan control signals and data control signals necessary for driving the scan driver 151 and the data driver 153 , and applies the generated scan control signals and data control signals to the scan driver ( 151) and the data driver 153 .
- the scan driver 151 receives a scan control signal from the timing controller 155 and generates a scan signal in response thereto.
- the data driver 153 receives a data control signal and image data from the timing controller 155 and generates a data signal corresponding thereto.
- the wiring unit includes a plurality of signal wirings. Specifically, the wiring unit includes first wirings 103 connecting the scan driver 151 and pixels and second wirings 102 connecting the data driver 153 and pixels. In an embodiment of the present invention, the first wirings 103 may be scan lines, and the second wirings 102 may be data lines. In addition, the wiring unit further includes wirings connecting the timing control unit 155 and the scan driving unit 151 , the timing control unit 155 and the data driving unit 153 , or other components and transmitting corresponding signals.
- the scan lines 103 provide the scan signal generated by the scan driver 151 to the pixels.
- the data signal generated by the data driver 153 is output to the data lines 102 .
- the data signal output to the data lines 102 is input to the pixels of the horizontal display module 110 line selected by the scan signal.
- the pixels are connected to scan lines 103 and data lines 102 .
- the pixels selectively emit light in response to a data signal input from the data lines 102 .
- each pixel emits light with a luminance corresponding to an input data signal.
- the pixels receiving the data signal corresponding to the black luminance display black by not emitting light during the corresponding frame period.
- the light emitting devices may be arranged in various shapes in the pixel area to form a pixel unit.
- FIG. 14 is a plan view illustrating that light emitting devices are arranged in a form different from that of the above-described embodiment, according to an embodiment of the present invention, and shows a portion corresponding to P1 of FIG. 1 .
- a plurality of light emitting devices 130 may be provided in the pixel region 111 of the module substrate 120 .
- the plurality of light emitting devices 130 may be arranged in various shapes to form a pixel unit.
- one pixel unit is configured as the first to third light emitting devices 130a, 130b, and 130c. It is shown that the first to third light emitting devices 130a, 130b, and 130c are arranged in a triangular shape.
- a plurality of light emitting devices 130 may be arranged in a matrix shape.
- the first, second, and third light-emitting devices 130a, 130b, and 130c are alternately arranged along rows or columns. may be arranged in this way, or may be alternately arranged along both rows and columns.
- the pixel unit is composed of first to third light emitting elements
- the first to third light emitting elements when the first to third light emitting elements are arranged, the first light emitting elements, the second light emitting elements, and the third light emitting elements are arranged in a row Alternatively, they may be arranged in a form that is sequentially repeated along a column, or may be arranged in a form that is repeated both along a row and a column.
- 15A is a plan view illustrating that light emitting devices are arranged in another form from the above-described embodiment, according to an embodiment of the present invention, and shows a portion corresponding to P1 of FIG. 1 .
- 15B is a conceptual diagram briefly illustrating the light emitting device shown in FIG. 15A.
- a plurality of light emitting devices 230 are provided in the pixel area 111 of the module substrate 120 and each light emitting device constitutes one pixel unit.
- Each of the light emitting devices 230 may include a plurality of epitaxial stacks emitting light of different colors.
- each of the light emitting devices 230 may include first to third epitaxial stacks 231 , 233 , and 235 in which three layers are sequentially stacked, as shown in FIG. 15B .
- Each epitaxial stack may emit color light of a visible light band among light of several wavelength bands.
- the first epitaxial stack 231 emits a first color light
- the second epitaxial stack 233 emits a second color light
- the third epitaxial stack 235 emits a third color light.
- the first to third color lights may correspond to different color lights
- the first to third color lights may be color lights of different wavelength bands sequentially having shorter wavelengths. That is, the first to third color lights may have different wavelength bands, and may be color lights of a short wavelength band having higher energy as the first color light goes from the third color light to the third color light.
- the first color light may be red light
- the second color light may be green light
- the third color light may be blue light.
- the order of the first to third color lights is not limited thereto, and may be provided in a different order according to the stacking order of the first to third epitaxial stacks 231 , 233 , and 235 .
- additional components for improving the assembling properties of the module substrates adjacent to each other may be further provided.
- FIGS. 16A and 16C are FIGS. As cross-sectional views taken along line B-B' of 16a, one embodiment of the present invention is shown.
- At least some of the corners of the module substrates 120 may be chamfered in various shapes.
- at least one of the corners of the four module substrates 120 adjacent to each other may be chamfered in a triangular shape, a quadrant shape, or other various shapes when viewed in a plan view.
- four opposite corners of the module substrates 120 are all chamfered in the form of a right triangle when viewed in a plan view as an example.
- a fixing member 180 for securely fastening the module substrates 120 adjacent to each other may be provided in the space.
- the fixing member 180 may have various shapes to easily fix the module substrates 120 , and may be made of black to prevent reflection or interference of light from each light emitting device.
- the fixing member 180 may have the shape of a screw.
- the fixing member 180 may have a screw thread 181 that is inserted into the space and can be screwed to the module boards 120 .
- a thread corresponding to the thread 181 of the fixing member 180 may be formed in the chamfered portion of the module substrates 120, and the module substrates ( 120 ) and the fixing member 180 may be fastened to each other.
- the fixing member 180 ′ may have a shape of a hook pin having an elastic force.
- the hook pin after being inserted into the space, it may have a stopping protrusion 183 that makes it difficult to separate again.
- the shape of the fixing member is that of a screw and a hook pin, it is not limited thereto, and may have a different shape as long as it is inserted into the chamfered portion to fix the module substrates. of course there is
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Description
Claims (20)
- 각각이 모듈 기판과, 상기 모듈 기판 상에 실장된 복수 개의 발광 소자들을 포함하는 복수 개의 표시 모듈들; 및상기 복수 개의 표시 모듈들이 배치되는 지지 기판을 포함하며,상기 모듈 기판들의 각각의 적어도 일 단부에는 상기 모듈 기판의 단부로부터 함몰된 함몰부 및 상기 함몰부에 제공된 연결 전극들이 제공되고, 상기 발광 소자들은 상기 연결 전극들을 통해 상기 지지 기판 상의 배선들과 전기적으로 연결되는 표시 장치.
- 제1 항에 있어서,상기 모듈 기판들 중 서로 인접한 두 모듈 기들을 제1 및 제2 모듈 기판이라고 할 때, 상기 제1 및 제2 모듈 기판들 중 적어도 하나는 적어도 일 단부에 복수 개의 함몰부들을 가지며, 상기 제1 및 제2 모듈 기판들 중 적어도 하나는 적어도 일 단부에 상기 복수 개의 함몰부들에 대응하는 위치에 상기 함몰부들 방향으로 돌출된 돌출부들을 가지는 표시 장치.
- 제2 항에 있어서,상기 함몰부는 평면상에서 볼 때 함몰된 부분의 형상이 삼각형, 반원, 또는 반타원 형상인 표시 장치.
- 제2 항에 있어서,상기 제1 및 제2 모듈 기판들 각각은 적어도 일 단부에 상기 함몰부들과 상기 돌출부들을 가지는 표시 장치.
- 제1 항에 있어서,상기 연결 전극들 각각은 상기 함몰부를 충진하는 표시 장치.
- 제1 항에 있어서,상기 제1 및 제2 모듈 기판의 일 단부의 함몰부를 보호하는 보호재를 더 포함하며, 상기 연결 전극은 상기 함몰부 면과 상기 보호재 사이에 제공되는 표시 장치.
- 제1 항에 있어서,상기 모듈 기판의 상면에 제공되며 상기 연결 전극에 연결된 연결 배선, 및 상기 모듈 기판의 하면에 제공되며 상기 연결 전극에 연결된 배면 연결 배선을 더 포함하며, 상기 배면 연결 배선은 상기 지지 기판과 BGA(ball grid array) 방식 또는 도전성 접착 부재로 연결되는 표시 장치.
- 제7 항에 있어서,상기 지지 기판은 상기 모듈 기판과 마주보는 면에 제공된 도전성 전극부를 가지며, 상기 연결 전극은 상기 배면 연결 배선을 통해 상기 도전성 전극부에 접촉하는 표시 장치.
- 제1 항에 있어서,상기 연결 전극들은 상기 발광 소자들을 구동할 수 있도록 상기 발광소자들에 대응하는 개수로 제공되는 표시 장치.
- 제1 항에 있어서,상기 모듈 기판은 상기 발광 소자들이 제공되어 영상이 표시되는 화소 영역과 상기 화소 영역을 둘러싸는 비화소 영역을 포함하며, 상기 연결 배선들의 일부 또는 전부는 상기 화소 영역에 제공되는 표시 장치.
- 제10 항에 있어서,상기 함몰부는 상기 비화소 영역에 제공되는 표시 장치.
- 제1 항에 있어서,상기 함몰부들은 상기 모듈 기판의 가장자리를 따라 배치되는 표시 장치.
- 복수 개의 표시 모듈을 제조 하는 단계; 및상기 복수 개의 표시 모듈들을 지지 기판 상에 제공하는 단계를 포함하며,상기 복수 개의 표시 모듈들 각각을 제조하는 단계는모듈 기판의 적어도 일 단부에 함몰부를 형성하는 단계;상기 함몰부에 연결 전극들을 형성하는 단계;상기 모듈 기판 상에 발광 소자들을 형성하는 단계; 및상기 모듈 기판의 하면에 구동 회로부를 형성하고 상기 연결 전극들을 통해 상기 발광 소자들과 상기 구동 회로부를 전기적으로 연결하는 단계를 포함하는 표시 장치 제조 방법.
- 제13 항에 있어서,상기 함몰부는 레이저를 이용하여 형성하는 표시 장치 제조 방법.
- 제13 항에 있어서,상기 연결 전극들을 형성하는 단계는,상기 함몰부가 형성된 모듈 기판의 적어도 일 단부 측면에 도전막을 형성하는 단계; 및상기 모듈 기판의 적어도 일 단부 측면을 연마하여 상기 함몰부를 제외한 일 단부 측면에 형성된 상기 도전막을 제거하는 단계를 포함하는 표시 장치 제조 방법.
- 제13 항에 있어서,상기 모듈 기판의 적어도 일 단부에 함몰부를 형성하는 단계와 상기 함몰부에 연결 전극들을 형성하는 단계는, 복수 개의 모듈 기판들을 서로 인접하게 배치시킨 후 복수 개의 모듈 기판들에서 동시에 수행되는 표시 장치 제조 방법.
- 제13 항에 있어서,상기 모듈 기판의 상면 및 하면에 각각 연결 배선들 및 배면 연결 배선들을 형성하는 단계를 더 포함하는 표시 장치 제조 방법.
- 제13 항에 있어서,상기 모듈 기판의 적어도 일 단부에 돌출부를 형성하는 단계를 더 포함하는 표시 장치 제조 방법.
- 제18 항에 있어서,상기 복수 개의 표시 모듈들을 상기 지지 기판 상에 제공할 때 상기 함몰부에 해당하는 위치에 상기 돌출부가 대응하도록 배치하는 표시 장치 제조 방법.
- 제13 항에 있어서,상기 복수 개의 표시 모듈들은 BGA 방식으로 상기 지지 기판 상에 제공되는 표시 장치 제조 방법.
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CN202180008684.8A CN115053283A (zh) | 2020-01-09 | 2021-01-07 | 显示装置 |
JP2022542433A JP2023510810A (ja) | 2020-01-09 | 2021-01-07 | 表示装置 |
KR1020227024361A KR20220123660A (ko) | 2020-01-09 | 2021-01-07 | 표시 장치 |
EP21738896.6A EP4086886A4 (en) | 2020-01-09 | 2021-01-07 | DISPLAY DEVICE |
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US202062958879P | 2020-01-09 | 2020-01-09 | |
US62/958,879 | 2020-01-09 | ||
US17/143,089 US11881473B2 (en) | 2020-01-09 | 2021-01-06 | Display apparatus |
US17/143,089 | 2021-01-06 |
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EP (1) | EP4086886A4 (ko) |
JP (1) | JP2023510810A (ko) |
KR (1) | KR20220123660A (ko) |
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US11664355B2 (en) * | 2019-12-02 | 2023-05-30 | Seoul Semiconductor Co., Ltd. | Display apparatus |
US11296269B2 (en) * | 2020-07-30 | 2022-04-05 | Lextar Electronics Corporation | Light emitting diode packaging structure and method for manufacturing the same |
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- 2021-01-06 US US17/143,089 patent/US11881473B2/en active Active
- 2021-01-07 CN CN202180008684.8A patent/CN115053283A/zh active Pending
- 2021-01-07 CN CN202120037892.8U patent/CN214671553U/zh active Active
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- 2021-01-07 WO PCT/KR2021/000192 patent/WO2021141407A1/ko unknown
- 2021-01-07 KR KR1020227024361A patent/KR20220123660A/ko unknown
- 2021-01-07 EP EP21738896.6A patent/EP4086886A4/en active Pending
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US20240194656A1 (en) | 2024-06-13 |
CN214671553U (zh) | 2021-11-09 |
CN115053283A (zh) | 2022-09-13 |
EP4086886A1 (en) | 2022-11-09 |
EP4086886A4 (en) | 2024-01-03 |
US20210217740A1 (en) | 2021-07-15 |
KR20220123660A (ko) | 2022-09-08 |
JP2023510810A (ja) | 2023-03-15 |
US11881473B2 (en) | 2024-01-23 |
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