WO2023033212A1 - 디스플레이 장치 - Google Patents
디스플레이 장치 Download PDFInfo
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- WO2023033212A1 WO2023033212A1 PCT/KR2021/012005 KR2021012005W WO2023033212A1 WO 2023033212 A1 WO2023033212 A1 WO 2023033212A1 KR 2021012005 W KR2021012005 W KR 2021012005W WO 2023033212 A1 WO2023033212 A1 WO 2023033212A1
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- Prior art keywords
- assembly
- barrier rib
- light emitting
- thickness
- display device
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/15—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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
Definitions
- the embodiment relates to a display device.
- a display device uses a self-light emitting element such as a light emitting diode as a light source of a pixel to display a high-quality image.
- a self-light emitting element such as a light emitting diode
- Light emitting diodes exhibit excellent durability even under harsh environmental conditions, and are in the limelight as a light source for next-generation display devices because of their long lifespan and high luminance.
- Such display devices are expanding into various forms such as flexible displays, foldable displays, stretchable displays, and rollable displays beyond flat panel displays.
- a typical display device includes more than tens of millions of pixels. Therefore, since it is very difficult to align at least one or more light emitting elements in each of tens of millions of small-sized pixels, various researches on arranging light emitting elements in a display panel have recently been actively conducted.
- Transfer technologies that have recently been developed include a pick and place process, a laser lift-off method, or a self-assembly method.
- a self-assembly method in which a light emitting device is transferred onto a substrate using a magnetic material (or magnet) has recently been in the spotlight.
- the self-assembly method In the self-assembly method, a number of light emitting elements are dropped into the tank containing the fluid, and the light emitting elements dropped into the fluid are moved to the pixels of the substrate according to the movement of the magnetic material, and the light emitting elements are arranged in each pixel. Therefore, the self-assembly method can quickly and accurately transfer a number of light emitting devices onto a substrate, and thus is attracting attention as a next-generation transfer method.
- FIG. 1 is a plan view illustrating a display device according to an applicant's undisclosed technology
- FIG. 2 is a cross-sectional view illustrating a display device according to an applicant's undisclosed technology.
- assembling wires 2a and 2b are disposed on a substrate 1 .
- the dielectrophoretic force F formed between the first assembling wire 2a and the second assembling wire 2b assembles the LEDs 5a and 5b into the assembling holes 3a and 3b. That is, the red LED 5a is assembled into the red assembly hole 3a, and the green LED 5b is assembled into the green assembly hole 5b.
- the dielectrophoretic force F is formed not only on the assembly holes 3a and 3b but also on the barrier rib 3 between the assembly holes 3a and 3b, the dielectrophoretic force F is applied to the upper surface of the barrier rib 3.
- a red LED 5a may be attached. Although red LEDs 5a are shown attached to the upper surface of the barrier 3 in the drawings, green LEDs 5b or blue LEDs may be attached.
- the red LED 5a When the red LED 5a is attached to the upper surface of the partition wall 3, the flow of other LEDs, that is, the green LED 5b or the blue LED, is hindered by the red LED 5a on the partition wall 3, so that the other LEDs are assembled. There is a problem in that the assembling rate is reduced due to the frequent occurrence of failure to assemble into the hole 3b.
- connection defects such as disconnection of electrode wires occur during the electrode wiring connection process due to the red LED 5a attached on the barrier rib 3.
- Embodiments are aimed at solving the foregoing and other problems.
- Another object of the embodiments is to provide a display device capable of improving assembly rate.
- Another object of the embodiments is to provide a display device capable of lowering material costs.
- Another object of the embodiments is to provide a display device capable of preventing assembly errors.
- Another object of the embodiments is to provide a display device capable of preventing electrical connection failure.
- Another object of the embodiments is to provide a display device capable of increasing productivity.
- a display device includes a substrate having a plurality of assembly areas and non-assembly areas; a first barrier rib disposed on the plurality of assembly regions and having an assembly hole; a second barrier rib disposed on the non-assembly area; and a semiconductor light emitting device in the assembly hole, wherein a thickness of the second barrier rib is greater than a thickness of the first barrier rib.
- Protrusions disposed in the plurality of assembly areas may be included.
- a difference value between a thickness of the second barrier rib and a thickness of the first barrier rib may be greater than or equal to a thickness of the protrusion.
- the protrusion may be an insulating member.
- the protrusion may be a part of the substrate.
- the second barrier rib may include a 2-1 barrier on the first assembled wire and the second assembled wire; and a 2-2 barrier rib disposed on the substrate.
- the thickness of the 2-1 barrier rib may be greater than that of the first barrier rib, and the thickness of the 2-2 barrier rib may be greater than the thickness of the 2-1 barrier rib.
- the protrusion may be the first assembly pattern and the second assembly pattern.
- the first assembly pattern has a thickness greater than the thickness of the first assembly wiring
- the second assembly pattern may have a thickness greater than the thickness of the second assembly line.
- each of the first partition wall, the 2-1 partition wall, and the 2-2 partition wall is positioned on the same plane, and the lower surface of each of the first partition wall, the 2-1 partition wall, and the 2-2 partition wall may not be located on the same plane.
- protrusions 330, 340, and 350 are disposed in the assembly area 310a to form the first partition wall 321 corresponding to the assembly area 310a.
- the thickness of the second barrier rib 322 corresponding to the non-assembled region 310b may be greater than the thickness. Accordingly, only the semiconductor light emitting devices 150_R, 150_G, and 150_B are assembled in the assembly holes 325_R, 325_G, and 325_B formed in the first barrier rib 321, and the semiconductor light emitting devices 150_R, 150_G, 150_B) may not be attached.
- This structure has the following technical effects.
- the semiconductor light emitting device Since the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322, the flow of other semiconductor light emitting devices is not hindered by the semiconductor light emitting device on the second barrier rib 322, so that other semiconductor light emitting devices can be assembled in the corresponding assembly hole. As a result, the assembly rate can be improved.
- the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322 and the semiconductor light emitting device is not disposed on the second barrier rib 322, material costs can be reduced.
- the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322, during the assembly process of other semiconductor light emitting devices, the semiconductor light emitting device attached to the upper surface of the second barrier rib 322 is located in an assembly hole where another semiconductor light emitting device is to be assembled. Assembling errors can be prevented.
- connection defects such as disconnection of electrode wires during the electrode wiring connection process can be prevented.
- the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322, an additional process of removing the semiconductor light emitting device attached to the upper surface of the second barrier rib 322 is not required, thereby simplifying the manufacturing process and reducing the manufacturing process time. It can be shortened and productivity can be improved.
- a separate protrusion may be provided. There is no need, the structure is simple and the cost can be reduced.
- FIG. 1 is a plan view illustrating a display device according to the applicant's undisclosed technology.
- FIG. 2 is a cross-sectional view showing a display device according to the applicant's undisclosed technology.
- FIG 3 illustrates a living room of a house in which a display device according to an exemplary embodiment is disposed.
- FIG. 4 is a schematic block diagram of a display device according to an exemplary embodiment.
- FIG. 5 is a circuit diagram illustrating an example of a pixel of FIG. 4 .
- FIG. 6 is an enlarged view of a first panel area in the display device of FIG. 3 .
- FIG. 7 is an enlarged view of area A2 of FIG. 6 .
- FIG. 8 is a view showing an example in which a light emitting device according to an embodiment is assembled to a substrate by a self-assembly method.
- FIG 9 is a plan view illustrating the display device according to the first embodiment.
- FIG. 10 is a cross-sectional view of the display device according to the first embodiment.
- Fig. 11 shows the distribution of dielectrophoretic force in the display device according to the first embodiment.
- FIG. 12 is a graph showing electric field strengths for each edge of a chip and a cup edge when a chip having a height (or thickness) of 4.1 ⁇ m is assembled in an assembly hole.
- FIG. 13 is a cross-sectional view of a display device according to a second embodiment.
- Fig. 14 shows the distribution of dielectrophoretic force in the display device according to the second embodiment.
- FIG. 15 is a cross-sectional view of a display device according to a third embodiment.
- Fig. 16 shows the distribution of dielectrophoretic force in the display device according to the third embodiment.
- the display device described in this specification includes a TV, a Shinage, a mobile phone, a smart phone, a head-up display (HUD) for a car, a backlight unit for a laptop computer, a display for VR or AR, and the like.
- a TV a Shinage
- a mobile phone a smart phone
- a head-up display HUD
- a backlight unit for a laptop computer
- a display for VR or AR and the like.
- the configuration according to the embodiment described in this specification can be applied to a device capable of displaying even a new product type to be developed in the future.
- FIG 3 illustrates a living room of a house in which a display device according to an exemplary embodiment is disposed.
- the display device 100 of the embodiment can display the status of various electronic products such as a washing machine 101, a robot cleaner 102, and an air purifier 103, and the electronic products and IOT-based and can control each electronic product based on the user's setting data.
- various electronic products such as a washing machine 101, a robot cleaner 102, and an air purifier 103
- the electronic products and IOT-based can control each electronic product based on the user's setting data.
- the display device 100 may include a flexible display fabricated on a thin and flexible substrate.
- a flexible display can be bent or rolled like paper while maintaining characteristics of a conventional flat panel display.
- a unit pixel means a minimum unit for implementing one color.
- a unit pixel of the flexible display may be implemented by a light emitting device.
- the light emitting device may be a Micro-LED or a Nano-LED, but is not limited thereto.
- FIG. 4 is a block diagram schematically illustrating a display device according to an exemplary embodiment
- FIG. 5 is a circuit diagram illustrating an example of a pixel of FIG. 4 .
- a display device may include a display panel 10 , a driving circuit 20 , a scan driving unit 30 and a power supply circuit 50 .
- the display device 100 may drive a light emitting element in an active matrix (AM) method or a passive matrix (PM) method.
- AM active matrix
- PM passive matrix
- the driving circuit 20 may include a data driver 21 and a timing controller 22 .
- the display panel 10 may be formed in a rectangular shape, but is not limited thereto. That is, the display panel 10 may be formed in a circular or elliptical shape. At least one side of the display panel 10 may be formed to be bent with a predetermined curvature.
- the display panel 10 may be divided into a display area DA and a non-display area NDA disposed around the display area DA.
- the display area DA is an area where the pixels PX are formed to display an image.
- the display panel 10 includes data lines (D1 to Dm, where m is an integer greater than or equal to 2), scan lines (S1 to Sn, where n is an integer greater than or equal to 2) crossing the data lines (D1 to Dm), and a high potential voltage.
- pixels PXs connected to the high potential voltage line VDDL supplied, the low potential voltage line VSSL supplied with the low potential voltage, and the data lines D1 to Dm and the scan lines S1 to Sn can include
- Each of the pixels PX may include a first sub-pixel PX1 , a second sub-pixel PX2 , and a third sub-pixel PX3 .
- the first sub-pixel PX1 emits light of a first color of a first main wavelength
- the second sub-pixel PX2 emits light of a second color of a second main wavelength
- the third sub-pixel PX3 emits light of a second color.
- a third color light having a third main wavelength may be emitted.
- the first color light may be red light
- the second color light may be green light
- the third color light may be blue light, but are not limited thereto.
- FIG. 4 it is illustrated that each of the pixels PX includes three sub-pixels, but is not limited thereto. That is, each of the pixels PX may include four or more sub-pixels.
- Each of the first sub-pixel PX1 , the second sub-pixel PX2 , and the third sub-pixel PX3 includes at least one of the data lines D1 to Dm, at least one of the scan lines S1 to Sn, and a high voltage signal. It can be connected to the upper voltage line (VDDL).
- the first sub-pixel PX1 may include light emitting elements LD, a plurality of transistors for supplying current to the light emitting elements LD, and at least one capacitor Cst.
- each of the first sub-pixel PX1 , the second sub-pixel PX2 , and the third sub-pixel PX3 may include only one light emitting element LD and at least one capacitor Cst. may be
- Each of the light emitting elements LD may be a semiconductor light emitting diode including a first electrode, a plurality of conductive semiconductor layers, and a second electrode.
- the first electrode may be an anode electrode and the second electrode may be a cathode electrode, but is not limited thereto.
- the light emitting device LD may be one of a horizontal light emitting device, a flip chip type light emitting device, and a vertical light emitting device.
- the plurality of transistors may include a driving transistor DT supplying current to the light emitting elements LD and a scan transistor ST supplying a data voltage to a gate electrode of the driving transistor DT.
- the driving transistor DT has a gate electrode connected to the source electrode of the scan transistor ST, a source electrode connected to the high potential voltage line VDDL to which a high potential voltage is applied, and first electrodes of the light emitting elements LD.
- a connected drain electrode may be included.
- the scan transistor ST has a gate electrode connected to the scan line (Sk, k is an integer satisfying 1 ⁇ k ⁇ n), a source electrode connected to the gate electrode of the driving transistor DT, and data lines Dj, j an integer that satisfies 1 ⁇ j ⁇ m).
- the capacitor Cst is formed between the gate electrode and the source electrode of the driving transistor DT.
- the storage capacitor Cst charges a difference between the gate voltage and the source voltage of the driving transistor DT.
- the driving transistor DT and the scan transistor ST may be formed of thin film transistors.
- the driving transistor DT and the scan transistor ST are formed of P-type MOSFETs (Metal Oxide Semiconductor Field Effect Transistors), but the present invention is not limited thereto.
- the driving transistor DT and the scan transistor ST may be formed of N-type MOSFETs. In this case, positions of the source and drain electrodes of the driving transistor DT and the scan transistor ST may be changed.
- each of the first sub-pixel PX1 , the second sub-pixel PX2 , and the third sub-pixel PX3 includes one driving transistor DT, one scan transistor ST, and one capacitor ( 2T1C (2 Transistor - 1 capacitor) having Cst) is illustrated, but the present invention is not limited thereto.
- Each of the first sub-pixel PX1 , the second sub-pixel PX2 , and the third sub-pixel PX3 may include a plurality of scan transistors ST and a plurality of capacitors Cst.
- the second sub-pixel PX2 and the third sub-pixel PX3 may be expressed with substantially the same circuit diagram as the first sub-pixel PX1 , a detailed description thereof will be omitted.
- the driving circuit 20 outputs signals and voltages for driving the display panel 10 .
- the driving circuit 20 may include a data driver 21 and a timing controller 22 .
- the data driver 21 receives digital video data DATA and a source control signal DCS from the timing controller 22 .
- the data driver 21 converts the digital video data DATA into analog data voltages according to the source control signal DCS and supplies them to the data lines D1 to Dm of the display panel 10 .
- the timing controller 22 receives digital video data DATA and timing signals from the host system.
- the timing signals may include a vertical sync signal, a horizontal sync signal, a data enable signal, and a dot clock.
- the host system may be an application processor of a smart phone or tablet PC, a monitor, a system on chip of a TV, and the like.
- the timing controller 22 generates control signals for controlling operation timings of the data driver 21 and the scan driver 30 .
- the control signals may include a source control signal DCS for controlling the operation timing of the data driver 21 and a scan control signal SCS for controlling the operation timing of the scan driver 30 .
- the driving circuit 20 may be disposed in the non-display area NDA provided on one side of the display panel 10 .
- the driving circuit 20 may be formed of an integrated circuit (IC) and mounted on the display panel 10 using a chip on glass (COG) method, a chip on plastic (COP) method, or an ultrasonic bonding method.
- COG chip on glass
- COP chip on plastic
- ultrasonic bonding method The present invention is not limited to this.
- the driving circuit 20 may be mounted on a circuit board (not shown) instead of the display panel 10 .
- the data driver 21 may be mounted on the display panel 10 using a chip on glass (COG) method, a chip on plastic (COP) method, or an ultrasonic bonding method, and the timing controller 22 may be mounted on a circuit board. there is.
- COG chip on glass
- COP chip on plastic
- the scan driver 30 receives the scan control signal SCS from the timing controller 22 .
- the scan driver 30 generates scan signals according to the scan control signal SCS and supplies them to the scan lines S1 to Sn of the display panel 10 .
- the scan driver 30 may include a plurality of transistors and be formed in the non-display area NDA of the display panel 10 .
- the scan driver 30 may be formed as an integrated circuit, and in this case, it may be mounted on a gate flexible film attached to the other side of the display panel 10 .
- the circuit board may be attached to pads provided on one edge of the display panel 10 using an anisotropic conductive film. Due to this, the lead lines of the circuit board may be electrically connected to the pads.
- the circuit board may be a flexible printed circuit board, a printed circuit board, or a flexible film such as a chip on film. The circuit board may be bent under the display panel 10 . Accordingly, one side of the circuit board may be attached to one edge of the display panel 10 and the other side may be disposed under the display panel 10 and connected to a system board on which a host system is mounted.
- the power supply circuit 50 may generate voltages necessary for driving the display panel 10 from the main power supplied from the system board and supply the voltages to the display panel 10 .
- the power supply circuit 50 generates a high potential voltage (VDD) and a low potential voltage (VSS) for driving the light emitting elements (LD) of the display panel 10 from the main power supply to generate the display panel 10. can be supplied to the high potential voltage line (VDDL) and the low potential voltage line (VSSL).
- the power supply circuit 50 may generate and supply driving voltages for driving the driving circuit 20 and the scan driving unit 30 from the main power.
- FIG. 6 is an enlarged view of a first panel area in the display device of FIG. 3;
- the display device 100 of the embodiment may be manufactured by mechanically and electrically connecting a plurality of panel areas such as the first panel area A1 by tiling.
- the first panel area A1 may include a plurality of light emitting elements 150 arranged for each unit pixel (PX in FIG. 4 ).
- the unit pixel PX may include a first sub-pixel PX1 , a second sub-pixel PX2 , and a third sub-pixel PX3 .
- a plurality of red light emitting elements 150R are disposed in the first sub-pixel PX1
- a plurality of green light emitting elements 150G are disposed in the second sub-pixel PX2
- a plurality of blue light emitting elements 150B may be disposed in the third sub-pixel PX3.
- the unit pixel PX may further include a fourth sub-pixel in which no light emitting element is disposed, but is not limited thereto.
- FIG. 7 is an enlarged view of area A2 of FIG. 6 .
- a display device 100 may include a substrate 200 , assembled wires 201 and 202 , an insulating layer 206 , and a plurality of light emitting elements 150 . More components than this may be included.
- the assembly wiring may include a first assembly wiring 201 and a second assembly wiring 202 spaced apart from each other.
- the first assembling wire 201 and the second assembling wire 202 may be provided to generate dielectrophoretic force for assembling the light emitting device 150 .
- the light emitting device 150 may be one of a horizontal light emitting device, a flip chip type light emitting device, and a vertical light emitting device.
- the light emitting element 150 may include, but is not limited to, a red light emitting element 150, a green light emitting element 150G, and a blue light emitting element 150B0 to form a sub-pixel, respectively. It is also possible to implement red and green colors by providing a green phosphor or the like.
- the substrate 200 may be a support member for supporting components disposed on the substrate 200 or a protection member for protecting components.
- the substrate 200 may be a rigid substrate or a flexible substrate.
- the substrate 200 may be formed of sapphire, glass, silicon or polyimide.
- the substrate 200 may include a flexible material such as polyethylene naphthalate (PEN) or polyethylene terephthalate (PET).
- PEN polyethylene naphthalate
- PET polyethylene terephthalate
- the substrate 200 may be a transparent material, but is not limited thereto.
- the substrate 200 may be a backplane provided with circuits in the sub-pixels PX1, PX2, and PX3 shown in FIGS. 4 and 5, for example, transistors ST and DT, capacitors Cst, and signal wires. However, it is not limited thereto.
- the insulating layer 206 may include an insulating and flexible organic material such as polyimide, PAC, PEN, PET, polymer, etc., or an inorganic material such as silicon oxide (SiO2) or silicon nitride series (SiNx), and may include a substrate. 200 and may form a single substrate.
- an insulating and flexible organic material such as polyimide, PAC, PEN, PET, polymer, etc.
- an inorganic material such as silicon oxide (SiO2) or silicon nitride series (SiNx)
- the insulating layer 206 may be a conductive adhesive layer having adhesiveness and conductivity, and the conductive adhesive layer may have flexibility and thus enable a flexible function of the display device.
- the insulating layer 206 may be an anisotropy conductive film (ACF) or a conductive adhesive layer such as an anisotropic conductive medium or a solution containing conductive particles.
- the conductive adhesive layer may be a layer that is electrically conductive in a direction perpendicular to the thickness but electrically insulating in a direction horizontal to the thickness.
- the insulating layer 206 may include an assembly hole 203 into which the light emitting device 150 is inserted. Therefore, during self-assembly, the light emitting element 150 can be easily inserted into the assembly hole 203 of the insulating layer 206 .
- the assembly hole 203 may be called an insertion hole, a fixing hole, an alignment hole, or the like.
- the assembly hole 203 may be different according to the shape of the light emitting device 150 .
- each of the red light emitting device, the green light emitting device, and the blue light emitting device may have a different shape, and may have an assembly hole 203 having a shape corresponding to the shape of each of these light emitting devices.
- the assembly hole 30 may include a first assembly hole for assembling a red light emitting device, a second assembly hole for assembling a green light emitting device, and a third assembly hole for assembling a blue light emitting device.
- a red light emitting device may have a circular shape
- a green light emitting device may have a first elliptical shape having a first minor axis and a second long axis
- a blue light emitting device may have a second elliptical shape having a second short axis and a second long axis. It is not limited to this.
- the second major axis of the elliptical shape of the blue light emitting device may be larger than the second major axis of the elliptical shape of the green light emitting device
- the second minor axis of the elliptical shape of the blue light emitting device may be smaller than the first minor axis of the elliptical shape of the green light emitting device.
- a method of mounting the light emitting device 150 on the substrate 200 may include, for example, a self-assembly method (FIG. 8) and a transfer method.
- FIG. 8 is a view showing an example in which a light emitting device according to an embodiment is assembled to a substrate by a self-assembly method.
- the substrate 200 may be a panel substrate of a display device.
- the substrate 200 will be described as a panel substrate of a display device, but the embodiment is not limited thereto.
- the substrate 200 may be formed of glass or polyimide.
- the substrate 200 may include a flexible material such as polyethylene naphthalate (PEN) or polyethylene terephthalate (PET).
- PEN polyethylene naphthalate
- PET polyethylene terephthalate
- the substrate 200 may be a transparent material, but is not limited thereto.
- a light emitting device 150 may be put into a chamber 1300 filled with a fluid 1200 .
- the fluid 1200 may be water such as ultrapure water, but is not limited thereto.
- a chamber may also be called a water bath, container, vessel, or the like.
- the substrate 200 may be disposed on the chamber 1300 .
- the substrate 200 may be introduced into the chamber 1300 .
- a pair of assembly wires 201 and 202 corresponding to each of the light emitting devices 150 to be assembled may be disposed on the substrate 200 .
- the assembled wires 201 and 202 may be formed of transparent electrodes (ITO) or may include a metal material having excellent electrical conductivity.
- the assembled wires 201 and 202 may be titanium (Ti), chromium (Cr), nickel (Ni), aluminum (Al), platinum (Pt), gold (Au), tungsten (W), molybdenum (Mo) ) It may be formed of at least one or an alloy thereof.
- An electric field is formed between the assembled wirings 201 and 202 by an externally supplied voltage, and a dielectrophoretic force may be formed between the assembled wirings 201 and 202 by the electric field.
- the light emitting element 150 can be fixed to the assembly hole 203 on the substrate 200 by this dielectrophoretic force.
- the distance between the assembly wires 201 and 202 is smaller than the width of the light emitting element 150 and the width of the assembly hole 203, so that the assembly position of the light emitting element 150 using an electric field can be more accurately fixed.
- An insulating layer 206 is formed on the assembled wires 201 and 202 to protect the assembled wires 201 and 202 from the fluid 1200 and prevent current flowing through the assembled wires 201 and 202 from leaking.
- the insulating layer 206 may be formed of a single layer or multiple layers of an inorganic insulator such as silica or alumina or an organic insulator.
- the insulating layer 206 may include an insulating and flexible material such as polyimide, PEN, PET, or the like, and may be integrally formed with the substrate 200 to form a single substrate.
- the insulating layer 206 may be an adhesive insulating layer or a conductive adhesive layer having conductivity. Since the insulating layer 206 is flexible, it can enable a flexible function of the display device.
- the insulating layer 206 has a barrier rib, and an assembly hole 203 may be formed by the barrier rib. For example, when the substrate 200 is formed, a portion of the insulating layer 206 is removed, so that each of the light emitting devices 150 may be assembled into the assembly hole 203 of the insulating layer 206 .
- An assembly hole 203 to which the light emitting devices 150 are coupled is formed in the substrate 200 , and a surface on which the assembly hole 203 is formed may contact the fluid 1200 .
- the assembly hole 203 may guide an accurate assembly position of the light emitting device 150 .
- the assembly hole 203 may have a shape and size corresponding to the shape of the light emitting element 150 to be assembled at the corresponding position. Accordingly, it is possible to prevent assembling another light emitting device or assembling a plurality of light emitting devices into the assembly hole 203 .
- the assembly device 1100 including a magnetic material may move along the substrate 200 .
- a magnetic material for example, a magnet or an electromagnet may be used.
- the assembly device 1100 may move while in contact with the substrate 200 in order to maximize the area of the magnetic field into the fluid 1200 .
- the assembly device 1100 may include a plurality of magnetic bodies or may include a magnetic body having a size corresponding to that of the substrate 200 . In this case, the moving distance of the assembling device 1100 may be limited within a predetermined range.
- the light emitting device 150 in the chamber 1300 may move toward the assembly device 1100 .
- the light emitting element 150 may enter the assembly hole 203 and come into contact with the substrate 200 .
- the electric field applied by the assembly lines 201 and 202 formed on the board 200 prevents the light emitting element 150 contacting the board 200 from being separated by the movement of the assembly device 1100.
- a predetermined solder layer (not shown) may be further formed between the light emitting element 150 assembled on the assembly hole 203 of the substrate 200 and the substrate 200 to improve the bonding strength of the light emitting element 150. .
- electrode wires may be connected to the light emitting element 150 to apply power.
- At least one insulating layer may be formed by a post process.
- At least one insulating layer may be a transparent resin or a resin containing a reflective material or a scattering material.
- the thickness of the second barrier rib in the non-assembled area is greater than the thickness of the first barrier rib around the assembly hole in the assembly area where the first electrode pattern and the second electrode pattern are disposed, so that the dielectric layer on the second barrier rib
- a display device preventing a semiconductor light emitting device from being attached to the upper surface of the second barrier rib by preventing migration force from being applied.
- FIG. 9 is a plan view of the display device according to the first embodiment
- FIG. 10 is a cross-sectional view of the display device according to the first embodiment.
- the display device 300 may include a plurality of pixels PX.
- a plurality of pixels PX may be arranged in a matrix.
- the plurality of pixels PX may have pixel rows arranged along a first direction (x direction) and pixel columns arranged along a second direction (y direction).
- Each of the plurality of pixels PX may include a plurality of sub-pixels PX1 , PX2 , and PX3 .
- Each of the plurality of pixels PX may display a unit image. That is, each of the plurality of pixels PX can implement full color.
- the plurality of sub-pixels may include a first sub-pixel PX1 , a second sub-pixel PX2 , and a third sub-pixel PX3 .
- first sub-pixel PX1 , the second sub-pixel PX2 , and the third sub-pixel PX3 are illustrated as having the same size in the figure, they may be different from each other.
- the first semiconductor light emitting device 150_R is disposed on the first sub-pixel PX1
- the second semiconductor light emitting device 150_G is disposed on the second sub-pixel PX2
- the third sub-pixel PX3 A third semiconductor light emitting device may be disposed.
- the first semiconductor light emitting device 150_R includes a red semiconductor light emitting device
- the second semiconductor light emitting device 150_G includes a green semiconductor light emitting device
- the third semiconductor light emitting device 150_B includes a blue semiconductor light emitting device.
- each of the first semiconductor light emitting device 150_R, the second semiconductor light emitting device 150_G, and the third semiconductor light emitting device 150_B may have a micrometer size or a nanometer size.
- a super-resolution display may be possible.
- the same sub-pixels may be repeatedly arranged along the first direction.
- the first sub-pixel PX1 is repeatedly arranged along the first direction
- the second sub-pixel PX2 is repeatedly arranged along the first direction
- the third sub-pixel PX3 is repeatedly arranged along the first direction.
- Repetitive arrangement of the same sub-pixels along the first direction may be referred to as a stripe column arrangement.
- the first stripe column includes first sub-pixels PX1 repeatedly arranged along the first direction
- the second stripe column includes second sub-pixels PX2 repeatedly arranged along the first direction.
- the third stripe column may include third sub-pixels PX3 repeatedly arranged along the first direction.
- the first sub-pixel PX1 , the second sub-pixel PX2 , and the third sub-pixel PX3 may be repeatedly arranged along the second direction.
- the first sub-pixel PX1 , the second sub-pixel PX2 , and the third sub-pixel PX3 are arranged in the order along the second direction, and are adjacent to the third sub-pixel PX3 to return to the first sub-pixel PX3 .
- the pixel PX1 , the second sub-pixel PX2 , and the third sub-pixel PX3 may be arranged in this order.
- the display device 300 according to the first embodiment may include a substrate 310 , barrier ribs 321 and 322 , and semiconductor light emitting elements 150_R, 150_G, and 150_B.
- the display device 300 according to the first embodiment may include more components than these, but is not limited thereto.
- the substrate 310 may be a support member for supporting components disposed on the substrate 310 or a protection member for protecting the components.
- the substrate 310 may have a plurality of assembled regions 310a and non-assembled regions 310b.
- the assembled region 310a may be a region where the semiconductor light emitting devices 150_R, 150_G, and 150_B are assembled
- the non-assembled region 310b may be a region where the semiconductor light emitting devices 150_R, 150_G, and 150_B are not assembled.
- the assembly region 310a may be a light emitting region in which light is generated by the semiconductor light emitting devices 150_R, 150_G, and 150_B.
- the semiconductor light emitting devices 150_R, 150_G, and 150_B are not disposed in the non-assembled region 310b, it may be a non-light emitting region in which light is not emitted.
- the barrier ribs 321 and 322 may be disposed on the substrate 310 .
- the barrier ribs 321 and 322 may have assembly holes 325_R, 325_G and 325_B through which the semiconductor light emitting devices 150_R, 150_G and 150_B are assembled.
- the insulating layer 315 may be exposed in the assembly holes 325_R, 325_G, and 325_B.
- bottom surfaces of the assembly holes 325_R, 325_G, and 325_B may be top surfaces of the insulating layer 315 .
- the assembly holes 325_R, 325_G, and 325_B may be disposed in each of the sub-pixels PX1 , PX2 , and PX3 .
- Thicknesses t1, t2, and t3 of the barrier ribs 321 and 322 may be determined in consideration of the thickness t11 of the semiconductor light emitting devices 150_R, 150_G, and 150_B.
- the thickness t1 of the barrier ribs 321 and 322 may be smaller than the thickness t11 of the semiconductor light emitting devices 150_R, 150_G, and 150_B, but is not limited thereto.
- the upper sides of the semiconductor light emitting devices 150_R, 150_G, and 150_B may be positioned higher than the upper surfaces of the barrier ribs 321 and 322 . That is, upper sides of the semiconductor light emitting devices 150_R, 150_G, and 150_B may protrude upward from the upper surfaces of the barrier ribs 321 and 322 .
- the assembly holes 325_R, 325_G, and 325_B may be determined.
- the size of the assembly holes 325_R, 325_G, and 325_B may be larger than the size of the semiconductor light emitting devices 150_R, 150_G, and 150_B.
- the semiconductor light emitting devices 150_R, 150_G, and 150_B are assembled at the center of the assembly holes 325_R, 325_G, and 325_B, the outer sides of the semiconductor light emitting devices 150_R, 150_G, and 150_B are formed by the assembly holes 325_R, 325_G, 325_B).
- Each of the semiconductor light emitting devices 150_R, 150_G, and 150_B may be assembled into assembly holes 325_R, 325_G, and 325_B to generate predetermined light.
- the semiconductor light emitting device may include a plurality of red semiconductor light emitting devices 150_R, green semiconductor light emitting devices 150_G, and blue semiconductor light emitting devices 150_B.
- the red semiconductor light emitting device 150_R is disposed in the first assembly hole 325_R of the first sub-pixel PX1
- the green semiconductor light emitting device 150_G is disposed in the second assembly hole 325_R of the second sub-pixel PX2. 325_G
- the blue semiconductor light emitting device 150_B may be disposed in the third assembly hole 325_B of the third sub-pixel PX3 .
- the display device 300 includes a first assembly pattern 311, second assembly patterns 312 and 312, first assembly wires 313, and second assembly wires 324. can do.
- the first assembly pattern 311 , the second assembly pattern 312 , the first assembly line 313 , and the second assembly line 324 may generate an electric field to form a dielectrophoretic force.
- the first assembly pattern 311 , the second assembly pattern 312 , the first assembly line 313 , and the second assembly line 324 may be disposed between the substrate 310 and the barrier rib.
- the first assembly wire 313 and the second assembly wire 324 may be disposed along the first direction.
- the first assembly pattern 311 and the second assembly pattern 312 may be disposed along the second direction.
- the first assembly pattern 311 may be connected to the first assembly line 313
- the second assembly pattern 312 may be connected to the second assembly line 324 .
- the first assembly pattern 311 extends from the first assembly wire 313 along the second direction
- the second assembly pattern 312 extends the first assembly pattern 311 from the second assembly wire 324.
- the first assembling pattern 311 and the second assembling pattern 312 may be arranged to face each other, but is not limited thereto.
- the first voltage and the second voltage may be alternately supplied to the first assembly pattern 311 and the second assembly pattern 312 .
- a first voltage is supplied to the first assembly pattern 311 via the first assembly line 313, and a second voltage is supplied to the second assembly pattern 311 via the second assembly line 324 ( 312) can be supplied.
- the second voltage is supplied to the first assembly pattern 311 via the first assembly line 313, and the first voltage is supplied to the second assembly pattern 311 via the second assembly line 324 ( 312) can be supplied.
- the first voltage may be a (+) voltage and the second voltage may be a (-) voltage.
- the first voltage may be a (+) voltage or a (-) voltage
- the second voltage may be grounded.
- An electric field may be generated between the first and second assembled patterns 311 and 312 by the first and second voltages.
- the dielectrophoretic force may be determined by an electric field, a radius of the semiconductor light emitting device, a permittivity of the insulating layer 315, and the like. Accordingly, a dielectrophoretic force may be formed between the first assembly pattern 311 and the second assembly pattern 312 .
- the thicknesses t1, t2, and t3 of the barrier rib are determined so that dielectrophoretic force is formed from the assembly region 310a to the upper surface of the barrier rib or even thereon.
- the red semiconductor light emitting device 5a when the thickness of the barrier rib 3 is the same in the assembled region and the non-assembled region, a dielectrophoretic force is formed on the barrier rib 3 in the assembled region as well as the non-assembled region. do. Accordingly, during the assembly process of the red semiconductor light emitting device 5a, the red semiconductor light emitting device 5a is not only assembled into the red assembly hole 3a but also attached to the upper surface of the barrier rib 3 in the non-assembled area.
- the red LED 5a When the red LED 5a is attached to the upper surface of the partition wall 3, the flow of other LEDs, that is, the green LED 5b or the blue LED, is hindered by the red LED 5a on the partition wall 3, so that the other LEDs are assembled. There is a problem in that the assembling rate is reduced due to the frequent occurrence of failure to assemble into the hole 3b.
- connection defects such as disconnection of electrode wires occur during the electrode wiring connection process due to the red LED 5a attached on the barrier rib 3.
- the thicknesses t2 and t3 of the barrier ribs (hereinafter, referred to as second barrier ribs 322) on the non-assembled region 310b are equal to or less than
- the aforementioned problem can be solved by making the semiconductor light emitting device not be attached to the upper surface of the second barrier rib 322 by making it larger than the thickness t1 of (referred to as ). That is, the semiconductor light emitting device may be disposed only in the assembly holes 325_R, 325_G, and 325_B formed in the barrier rib of the assembly region 310a and not located in other regions, that is, the non-assembly region 310b.
- the dielectrophoretic force does not reach the second barrier rib 322, and the semiconductor light emitting device fixed by the dielectrophoretic force is second. It may not be attached to the upper surface of the partition wall 322 .
- the barrier rib may include a first barrier rib 321 disposed on the assembly area 310a and having assembly holes 325_R, 325_G, and 325_B, and a second barrier rib 322 disposed on the non-assembled area 310b. there is.
- the thicknesses t2 and t3 of the second barrier rib 322 may be greater than the thickness t1 of the first barrier rib 321 .
- the first assembling pattern 311, the first assembling wire 313, the second assembling pattern 312, and the second assembling wire 324 may be disposed under the first barrier rib 321 and the second barrier rib 322.
- the first assembly pattern 311 and the second assembly pattern 312 are disposed under the first barrier rib 321 corresponding to the assembly area 310a
- the first assembly wiring 313 and the second assembly wiring ( 324 may be disposed below the second barrier rib 322 corresponding to the non-assembled area 310b, but is not limited thereto.
- each of the first partition 321 and the second partition 322 are positioned on the same plane, and the thicknesses t2 and t3 of the second partition 322 are equal to the thickness t1 of the first partition 321 ), the lower surfaces of the first barrier rib 321 and the second barrier rib 322 may be positioned differently from each other.
- first barrier rib 321 and the second barrier rib 322 may not be positioned on the same plane. That is, the lower surface of the second barrier rib 322 may protrude downward from the lower surface of the first barrier rib 321 . Since the first assembly pattern 311, the first assembly wiring 313, the second assembly pattern 312, and the second assembly wiring 324 are disposed under the first partition 321 and the second partition 322, The first assembled wiring 313 and the second assembled wiring 324 disposed under the second partition 322 corresponding to the non-assembled area 310b are disposed under the first partition 321 corresponding to the assembled area 310a. It may be positioned further below the first assembling pattern 311 and the second assembling pattern 312 disposed on.
- the dielectrophoretic force formed by the first and second assembly patterns 311 and 312 exposed by the assembly holes 325_R, 325_G, and 325_B is applied to the first barrier rib 321 ), the semiconductor light emitting device positioned on the first barrier rib 321 corresponding to the assembly region 310a is pulled into the corresponding assembly holes 325_R, 325_G, and 325_B, and the corresponding assembly holes 325_R, 325_G, and 325_B can be assembled to In contrast, since the second assembly line 324 and the dielectrophoretic force formed by the second assembly line 324 do not affect the second partition 322 due to the thickness of the second partition 322, the second partition 322 The semiconductor light emitting device positioned on 322 is not attached to the upper surface of the second barrier rib 322 and is freely movable.
- FIG. 12 is a graph showing electric field strengths for each edge of a chip and a cup edge when a chip having a height (or thickness) of 4.1 ⁇ m is assembled in an assembly hole.
- the cup may represent a barrier rib
- the chip may represent a semiconductor light emitting device.
- the cup edge shows an electric field strength of 2 or less when the cup height is 2 ⁇ m or more
- the chip edge shows an electric field intensity of 2 or less when the cup height is 3 ⁇ m to 4.5 ⁇ m. Therefore, from FIG. 12 , the height (or thickness) of the first barrier rib 321 corresponding to the assembly region 310a may be determined within ⁇ 20% of the chip height. At the height of the first barrier rib 321 determined as described above, the electric field strength of the cup edge and the electric field strength of the chip edge are low to 2 or less, so that other chips (semiconductor light emitting devices) may not be duplicately attached to a chip assembled in the assembly hole. there is.
- the second barrier rib 322 may include a 2-1 barrier rib 322_1 and a 2-2 barrier rib 322_2.
- the 2-1 barrier rib 322_1 may be referred to as a second barrier rib 322, and the 2-2 barrier rib 322_2 may also be referred to as a third barrier rib.
- the 2-1 barrier rib 322_1 may be disposed on the first assembly line 313 and the second assembly line 324 .
- the 2-2 barrier rib 322_2 may be disposed on the substrate 310 . That is, the 2-2 barrier rib 322_2 may not vertically overlap each of the first and second assembly wires 313 and 324 .
- each of the first partition 321, the 2-1 partition 322_1 and the 2-2 partition 322_2 are positioned on the same plane, and the first partition 321 and the 2-1 partition 322_1 And the lower surface of each of the 2-2 partition walls 322_2 may not be located on the same plane. That is, the lower surfaces of the first barrier rib 321 , the 2-1 barrier rib 322_1 , and the 2-2 barrier rib 322_2 may be positioned differently from each other.
- the thickness t2 of the 2-1 barrier rib 322_1 may be greater than the thickness t1 of the first barrier rib 321 .
- the 2-1 partition 322_1 is the first partition 321 ) may protrude downward from the lower surface of the Accordingly, the first assembling wires 313 and the second assembling wires 324 disposed under the 2-1 barrier rib 322_1 are formed by the first assembling pattern 311 and the second assembled wire 311 disposed under the first barrier rib 321 . It may be positioned further below the assembly pattern 312 .
- the dielectrophoretic force is It may affect the first barrier rib 321 corresponding to the assembly area 310a.
- the first assembly wire 313 and the second assembly wire 324 Since it is located lower than the assembly pattern 311 and the second assembly pattern 312, it does not affect the 2-1 barrier rib 322_1. Accordingly, the semiconductor light emitting device may be assembled into the assembly holes 325_R, 325_G, and 325_B formed in the first barrier rib 321, but the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322.
- the thickness t3 of the 2-2nd partition 322_2 may be greater than the thickness t2 of the 2-1st partition 322_1.
- the 2-2 partition wall 322_2 is the 2-1 partition wall It may protrude downward from the lower surface of (322_1).
- the semiconductor light emitting device is not attached to the upper surface of the 2-2 barrier rib 322_2.
- the thickness t2 of the 2-1 barrier rib 322_1 may be greater than the thickness t11 of the semiconductor light emitting device.
- the thickness t2 of the 2-1st barrier rib 322_1 may be 1.2 times or more than the thickness t11 of the semiconductor light emitting device.
- the thickness t2 of the 2-1 barrier rib 322_1 may be 1.5 times or more than the thickness t11 of the semiconductor light emitting device.
- the thickness t2 of the 2-1 barrier rib 322_1 may be 1.2 times greater than the thickness t1 of the first barrier rib 321 .
- the thickness t2 of the 2-1 barrier rib 322_1 may be 1.5 times greater than the thickness t1 of the first barrier rib 321 .
- the second partition wall 322, particularly the 2-1 partition wall 322_1 is formed to have thicker thicknesses t2 and t3 than the thickness t1 of the first partition wall 321
- the dielectrophoretic force formed by the first and second assembly patterns 311 and 312 disposed under the first barrier rib 321 affects the first barrier rib 321, so that the first barrier rib ( 321 ) can be easily assembled into the assembly holes 325_R, 325_G, and 325_B formed in the first barrier rib 321 .
- the dielectrophoretic force formed by the first assembly line 313 and the second assembly line 324 disposed under the 2-1 barrier rib 322_1 is reduced due to the thickness of the second barrier rib 322 .
- the semiconductor light emitting device may not be attached to the upper surface of the second barrier rib 322 without affecting the top of the 322 . Accordingly, since the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322, the following technical advantages may be obtained.
- the semiconductor light emitting device Since the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322, the flow of other semiconductor light emitting devices is not hindered by the semiconductor light emitting device on the second barrier rib 322, so that other semiconductor light emitting devices can be assembled in the corresponding assembly hole. As a result, the assembly rate can be improved.
- the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322 and the semiconductor light emitting device is not disposed on the second barrier rib 322, material costs can be reduced.
- the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322, during the assembly process of other semiconductor light emitting devices, the semiconductor light emitting device attached to the upper surface of the second barrier rib 322 is located in an assembly hole where another semiconductor light emitting device is to be assembled. Assembling errors can be prevented.
- connection defects such as disconnection of electrode wires during the electrode wiring connection process can be prevented.
- the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322, an additional process of removing the semiconductor light emitting device attached to the upper surface of the second barrier rib 322 is not required, thereby simplifying the manufacturing process and reducing the manufacturing process time. It can be shortened and productivity can be improved.
- the display device 300 may include the protruding portion 330 .
- the protrusion 330 may be disposed in the assembly area 310a.
- the protrusion 330 may be disposed under the first partition wall 321 corresponding to the assembly area 310a.
- the protrusion 330 may be disposed under the assembly holes 325_R, 325_G, and 325_B formed in the first barrier rib 321.
- the protrusion 330 may be disposed under the first assembly pattern ( 311) and the second assembly pattern 312.
- the protrusion 330 may be disposed between the substrate 310 and the first and second assembly patterns 311 and 312 in the assembly area 310a.
- the protrusion 330 may be disposed between the substrate 310 and the first assembly pattern 311 and between the substrate 310 and the second assembly pattern 312 in the assembly area 310a.
- the protrusion 330 may vertically overlap the first assembly pattern 311 and the second assembly pattern 312 in the assembly area 310a.
- the protrusion 330 may have an island pattern. That is, the protrusion 330 may be located in the assembly area 310a of each of the plurality of sub-pixels PX1 , PX2 , and PX3 . Thus, the protrusions 330 may be patterns spaced apart from each other. For example, the first protrusion is located in the first assembly area of the first sub-pixel PX1 , the second protrusion is located in the second assembly area of the second sub-pixel PX2 , and the A third protrusion may be located in the third assembly area.
- a difference value between the thicknesses t2 and t3 of the second barrier rib 322 and the thickness t1 of the first barrier rib 321 may be greater than or equal to the thickness t21 of the protrusion 330 .
- a difference value between the thicknesses t2 and t3 of the second barrier rib 322 and the thickness t1 of the first barrier rib 321 may be equal to the thickness t21 of the protrusion 330 .
- a difference value between the thicknesses t2 and t3 and the thickness t1 of the first barrier rib 321 may be greater than the thickness t21 of the protrusion 330 .
- the protrusion 330 is disposed under the first partition 321 corresponding to the assembly area 310a, but the protrusion 330 is not disposed under the second partition 322 corresponding to the non-assembly area 310b.
- the thickness t1 of the first barrier rib 321 and the thicknesses t2 and t3 of the second barrier rib 322 may be different. That is, when the upper surfaces of each of the first partition wall 321 and the second partition wall 322 are positioned on the same plane, the protruding portion 330 is disposed under the second partition wall 322 corresponding to the non-assembled region 310b. Since the lower surfaces of each of the first partition 321 and the second partition 322 are not located on the same plane, the thickness t1 of the first partition 321 and the thickness t2 of the second partition 322 , t3) may vary.
- the protrusion 330 may be an insulating member 330 . That is, the protrusion 330 may be made of an inorganic material or an organic material.
- the insulating member 330 may be disposed between the substrate 310 and the first barrier rib 321 .
- the insulating member 330 may be formed of a material having a permittivity, but is not limited thereto.
- the protrusion 330 may have a rectangular shape when viewed from above, but may have various shapes such as a circular shape and an elliptical shape. For example, as long as the size (or area) of the protrusion 330 is greater than the size (or area) of the assembling holes 325_R, 325_G, and 325_B, any shape of the protrusion 330 may be used.
- each of the first assembling pattern 311 and the second assembling pattern 312 are shown as being in contact with the upper surface of the insulating member 330, but the first assembling pattern 311 and the second assembling pattern 312 At least one layer may be disposed between the insulating member and the insulating member.
- the width w2 of the protrusion 330 may be greater than or equal to the width w1 of the assembly holes 325_R, 325_G, and 325_B.
- the width w2 of the protrusion 330 may be the same as the width w1 of the assembly holes 325_R, 325_G, and 325_B.
- the width w2 of the protrusion 330 may be greater than the width w1 of the assembly holes 325_R, 325_G, and 325_B.
- the thicknesses t2 and t3 of the second partition wall 322 are equal to the thickness of the first partition wall 321 ( t1) can be greater than.
- the semiconductor light emitting device includes a plurality of light emitting devices disposed in the plurality of assembly holes 325_R, 325_G, and 325_B between the first assembly line 313 and the second assembly line 324 along the first direction to generate light of the same color.
- a semiconductor light emitting device may be included.
- the protruding portion 330 may be disposed below each of a plurality of semiconductor light emitting devices generating light of the same color.
- the protrusion 330 may be disposed below each of the plurality of red semiconductor light emitting devices.
- each of the first partition 321 and the second partition 322 are located on the same plane, and the lower surfaces of each of the first partition 321 and the second partition 322 are not located on the same plane. but it could also be the other way around. That is, the upper surfaces of each of the first partition 321 and the second partition 322 may not be located on the same plane, but the lower surfaces of each of the first partition 321 and the second partition 322 may be located on the same plane. .
- FIG. 13 is a cross-sectional view of a display device according to a second embodiment.
- the second embodiment is the same as the first embodiment except that a part of the substrate 310 is used as the protrusion 340 .
- the same reference numerals are given to components having the same shape, structure and/or function as those in the first embodiment, and detailed descriptions are omitted.
- the display device 300A according to the second embodiment includes a substrate 310, a protrusion 340, a first assembling pattern 311, a second assembling pattern 312, and barrier ribs 321 and 322. and semiconductor light emitting devices 150_R, 150_G, and 150_B.
- the display device 300A according to the second embodiment may include more components than these, but is not limited thereto.
- the substrate 310 may have a plurality of assembled regions 310a and non-assembled regions 310b.
- the protrusion 340 may be disposed in each of the plurality of assembly areas 310a.
- the protrusion 340 may be disposed between the substrate 310 and the first and second assembly patterns 311 and 312 .
- the protrusion 340 may be disposed between the substrate 310 and the first assembly pattern 311 .
- the protrusion 340 may be disposed between the substrate 310 and the second assembly pattern 312 .
- the protrusion 340 may be part of the substrate 310 .
- the protrusion 340 may protrude upward from the upper surface of the substrate 310 .
- the protruding portion 340 may protrude from the upper surface of the substrate 310 toward the assembly holes 325_R, 325_G, and 325_B or the semiconductor light emitting device. In this case, there is no need to provide a separate protrusion, so the structure is simple and cost can be reduced.
- the first assembly pattern 311 may be positioned higher than the first assembly line 313
- the second assembly pattern 312 may be positioned higher than the second assembly line 324 .
- the barrier rib may be disposed on the first assembling pattern 311 , the second assembling pattern 312 , the first assembling wire 313 , the second assembling wire 324 , and the substrate 310 .
- the barrier rib may have a first barrier rib 321 and a second barrier rib 322 .
- the second barrier rib 322 may include a 2-1 barrier rib 322_1 and a 2-2 barrier rib 322_2.
- the 2-1 barrier rib 322_1 may be referred to as a second barrier rib 322, and the 2-2 barrier rib 322_2 may also be referred to as a third barrier rib.
- Assembly holes 325_R, 325_G, and 325_B may be formed in the first barrier rib 321 disposed in the assembly region 310a, and semiconductor light emitting devices may be disposed in the assembly holes 325_R, 325_G, and 325_B.
- first barrier rib 321 may be disposed in the assembly area 310a and the second barrier rib 322 may be disposed in the non-assembled area 310b.
- first assembly pattern 311 and the second assembly pattern 312 may be disposed under the first barrier rib 321 .
- first assembling wire 313 and the second assembling wire 324 may be disposed below the second barrier rib 322 , particularly the 2-1 barrier rib 322_1 .
- a difference value between the thicknesses t2 and t3 of the second barrier rib 322 and the thickness t1 of the first barrier rib 321 may be greater than or equal to the thickness t21 of the protrusion 340 .
- the difference between the thickness t2 of the 2-1 barrier rib 322_1 and the thickness t1 of the first barrier rib 321 may be greater than or equal to the thickness t21 of the protrusion 340 .
- the difference value between the thickness t2 of the 2-1st barrier rib 322_1 and the thickness t1 of the first barrier rib 321 may be equal to the thickness t21 of the protrusion 340 .
- a difference between the thickness t2 of the 2-1 barrier rib 322_1 and the thickness t1 of the first barrier rib 321 may be greater than the thickness t21 of the protrusion 340 .
- the first partition 321 depends on whether the protruding portion 340 is disposed. ), the thicknesses t1, t2, and t3 of the 2-1 barrier rib 322_1 and the 2-2 barrier rib 322_2 may be different.
- the thickness t1 of the first barrier rib 321 is 2-1 It may be smaller than the thickness t2 of the barrier rib 322_1 or the thickness t3 of the 2-2 barrier rib 322_2.
- the thickness t2 of the 2-1 barrier rib 322_1 is the first barrier 321 ) and may be smaller than the thickness t3 of the 2-2 partition wall 322_2.
- the first assembling pattern 311, the second assembling pattern 312, the first assembling wire 313, the second assembling wire 324, and/or the protrusion 340 are formed under the 2-2 partition wall 322_2. is not disposed, the thickness t3 of the 2-2 barrier rib 322_2 may be greater than the thickness t1 of the first barrier rib 321 or the thickness t2 of the 2-1 barrier rib 322_1.
- the dielectrophoretic force formed by the first assembling pattern 311 and the second assembling pattern 312 in the assembling area 310a affects the first barrier rib 321 .
- the semiconductor light emitting device on the first barrier rib 321 can be pulled into the assembly holes 325_R, 325_G, and 325_B by dielectrophoretic force and assembled into the assembly holes 325_R, 325_G, and 325_B.
- the thickness t2 of the 2-1 barrier rib 322_1 is greater than the thickness t1 of the first barrier rib 321, the first assembled wiring 313 and the second assembled wire 313 disposed in the non-assembled region 310b
- the dielectrophoretic force formed by the assembled wiring 324 does not reach the second barrier rib 322 . Therefore, since the semiconductor light emitting device positioned on the second barrier rib 322 is not fixed by dielectrophoretic force, it is not attached to the upper surface of the second barrier rib 322 .
- the thickness t3 of the 2-2 partition wall 322_2 is greater than the thickness t1 of the first partition wall 321, and the first assembling pattern 311, the second assembly pattern 312, and the first assembling pattern 311 are formed. Since the wiring 313 and the second assembly wiring 324 are not disposed, dielectrophoretic force is not formed, so that the semiconductor light emitting device is not attached to the 2-2 barrier rib 322_2.
- the thicknesses t2 and t3 of the second barrier rib 322 are greater than the thickness t1 of the first barrier rib 321, so that the following technical can have advantages.
- the semiconductor light emitting device Since the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322, the flow of other semiconductor light emitting devices is not hindered by the semiconductor light emitting device on the second barrier rib 322, so that other semiconductor light emitting devices can be assembled in the corresponding assembly hole. As a result, the assembly rate can be improved.
- the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322 and the semiconductor light emitting device is not disposed on the second barrier rib 322, material costs can be reduced.
- the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322, during the assembly process of other semiconductor light emitting devices, the semiconductor light emitting device attached to the upper surface of the second barrier rib 322 is located in an assembly hole where another semiconductor light emitting device is to be assembled. Assembling errors can be prevented.
- connection defects such as disconnection of electrode wires during the electrode wiring connection process can be prevented.
- the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322, an additional process of removing the semiconductor light emitting device attached to the upper surface of the second barrier rib 322 is not required, thereby simplifying the manufacturing process and reducing the manufacturing process time. It can be shortened and productivity can be improved.
- the protruding portion 340 is also disposed under the spaced apart space between the first assembling pattern 311 and the second assembling pattern 312, the protruding portion 340 is formed between the first assembling pattern 311 and the second assembling pattern 311. It may not be disposed below the separation space between the second assembly patterns 312 . That is, the protrusion 340 may include a first protrusion disposed under the first assembly pattern 311 and a second protrusion disposed under the second assembly pattern 312 . In this case, the first protrusion and the second protrusion may be spaced apart from each other horizontally.
- FIG. 15 is a cross-sectional view of a display device according to a third embodiment.
- the third embodiment is the same as the first embodiment except that the first assembly pattern 311 and the second assembly pattern 312 are used as the protruding portion 350 .
- the same reference numerals are given to components having the same shape, structure and/or function as those in the first or second embodiment, and detailed descriptions are omitted.
- the display device 300B according to the third embodiment includes a substrate 310, a protrusion 350, a first assembling pattern 311, a second assembling pattern 312, and barrier ribs 321 and 322. ) and semiconductor light emitting devices 150_R, 150_G, and 150_B.
- the display device 300B according to the third embodiment may include more components than these, but is not limited thereto.
- the substrate 310 may have a plurality of assembled regions 310a and non-assembled regions 310b.
- the protrusion 350 may be disposed in each of the plurality of assembly areas 310a.
- the protrusion 350 may be the substrate 310 , the first assembly pattern 311 , and the second assembly pattern 312 .
- the first assembly pattern 311 may have a thickness t32 greater than the thickness t31 of the first assembly line 313 .
- the second assembly pattern 312 may have a thickness t42 greater than the thickness t41 of the second assembly line 324 .
- the first assembling pattern 311 and the second assembling pattern 312 may be used as a member forming dielectrophoretic force to assemble the semiconductor light emitting device into the assembling holes 325_R, 325_G, and 325_B.
- the first assembling pattern 311 and the second assembling pattern 312 are protruding portions 350 differentiating the thickness t1 of the first barrier rib 321 and the thicknesses t2 and t3 of the second barrier rib 322 can be used as In this case, there is no need to provide a separate protrusion, so the structure is simple and cost can be reduced.
- the first assembly pattern 311 may be positioned higher than the first assembly line 313
- the second assembly pattern 312 may be positioned higher than the second assembly line 324 .
- the barrier rib may be disposed on the first assembling pattern 311 , the second assembling pattern 312 , the first assembling wire 313 , the second assembling wire 324 , and the substrate 310 .
- the barrier rib may have a first barrier rib 321 and a second barrier rib 322 .
- the second barrier rib 322 may include a 2-1 barrier rib 322_1 and a 2-2 barrier rib 322_2.
- the 2-1 barrier rib 322_1 may be referred to as a second barrier rib 322, and the 2-2 barrier rib 322_2 may also be referred to as a third barrier rib.
- Assembly holes 325_R, 325_G, and 325_B may be formed in the first barrier rib 321 disposed in the assembly region 310a, and semiconductor light emitting devices may be disposed in the assembly holes 325_R, 325_G, and 325_B.
- first barrier rib 321 may be disposed in the assembly area 310a and the second barrier rib 322 may be disposed in the non-assembled area 310b.
- first assembly pattern 311 and the second assembly pattern 312 may be disposed under the first barrier rib 321 .
- first assembling wire 313 and the second assembling wire 324 may be disposed below the second barrier rib 322 , particularly the 2-1 barrier rib 322_1 .
- the difference between the thicknesses t2 and t3 of the second barrier rib 322 and the thickness t1 of the first barrier rib 321 is the thickness t31 of the first assembly pattern 311 and the first assembly wire 313 It may be greater than or equal to the difference between the thicknesses t32 of or greater than the difference between the thickness t41 of the second assembly pattern 312 and the thickness t42 of the second assembly line 324 .
- the first partition 321 depends on whether the protruding portion 350 is disposed. ), the thicknesses t1, t2, and t3 of the 2-1 barrier rib 322_1 and the 2-2 barrier rib 322_2 may be different.
- the thickness t1 of the first barrier rib 321 is the second It may be smaller than the thickness t2 of the -1 barrier rib 322_1 or the thickness t3 of the 2-2 barrier rib 322_2.
- the thickness t2 of the 2-1 barrier rib 322_1 is the first barrier 321 ) and may be smaller than the thickness t3 of the 2-2 partition wall 322_2.
- the first assembling pattern 311, the second assembling pattern 312, the first assembling wire 313, the second assembling wire 324, and/or the protruding portion 350 are formed under the 2-2 partition wall 322_2. is not disposed, the thickness t3 of the 2-2 barrier rib 322_2 may be greater than the thickness t1 of the first barrier rib 321 or the thickness t2 of the 2-1 barrier rib 322_1.
- the dielectrophoretic force formed by the first assembling pattern 311 and the second assembling pattern 312 in the assembling area 310a affects the first barrier rib 321 .
- the semiconductor light emitting device on the first barrier rib 321 can be pulled into the assembly holes 325_R, 325_G, and 325_B by dielectrophoretic force and assembled into the assembly holes 325_R, 325_G, and 325_B.
- the thickness t2 of the 2-1 barrier rib 322_1 is greater than the thickness t1 of the first barrier rib 321, the first assembled wiring 313 and the second assembled wire 313 disposed in the non-assembled region 310b
- the dielectrophoretic force formed by the assembled wiring 324 does not reach the second barrier rib 322 . Therefore, since the semiconductor light emitting device positioned on the second barrier rib 322 is not fixed by dielectrophoretic force, it is not attached to the upper surface of the second barrier rib 322 .
- the thickness t3 of the 2-2 partition wall 322_2 is greater than the thickness t1 of the first partition wall 321, and the first assembling pattern 311, the second assembly pattern 312, and the first assembling pattern 311 are formed. Since the wiring 313 and the second assembly wiring 324 are not disposed, dielectrophoretic force is not formed, so that the semiconductor light emitting device is not attached to the 2-2 barrier rib 322_2.
- the thickness (t2, t3) of the second barrier rib 322 is greater than the thickness (t1) of the first barrier rib 321.
- the semiconductor light emitting device Since the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322, the flow of other semiconductor light emitting devices is not hindered by the semiconductor light emitting device on the second barrier rib 322, so that other semiconductor light emitting devices can be assembled in the corresponding assembly hole. As a result, the assembly rate can be improved.
- the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322 and the semiconductor light emitting device is not disposed on the second barrier rib 322, material costs can be reduced.
- the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322, during the assembly process of other semiconductor light emitting devices, the semiconductor light emitting device attached to the upper surface of the second barrier rib 322 is located in an assembly hole where another semiconductor light emitting device is to be assembled. Assembling errors can be prevented.
- connection defects such as disconnection of electrode wires during the electrode wiring connection process can be prevented.
- the semiconductor light emitting device is not attached to the upper surface of the second barrier rib 322, an additional process of removing the semiconductor light emitting device attached to the upper surface of the second barrier rib 322 is not required, thereby simplifying the manufacturing process and reducing the manufacturing process time. It can be shortened and productivity can be improved.
- the embodiment may be adopted in the display field for displaying images or information.
- the embodiment can be adopted in the field of display displaying images or information using a semiconductor light emitting device.
- the semiconductor light-emitting device may be a micro-level semiconductor light-emitting device or a nano-level semiconductor light-emitting device.
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- Microelectronics & Electronic Packaging (AREA)
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
Claims (19)
- 복수의 조립 영역과 비 조립 영역을 갖는 기판;상기 복수의 조립 영역 상에 배치되고, 조립 홀을 갖는 제1 격벽;상기 비 조립 영역 상에 배치되는 제2 격벽; 및상기 조립 홀에 반도체 발광 소자를 포함하고,상기 제2 격벽의 두께가 상기 제1 격벽의 두께보다 큰디스플레이 장치.
- 제1항에 있어서,상기 복수의 조립 영역에 배치되는 돌출부를 포함하는디스플레이 장치.
- 제2항에 있어서,상기 돌출부는 서로 이격된 패턴인디스플레이 장치.
- 제2항에 있어서,상기 제2 격벽이 두께와 상기 제1 격벽의 두께 사이의 차이 값은 상기 돌출부의 두께 이상인디스플레이 장치.
- 제2항에 있어서,상기 돌출는 절연 부재인디스플레이 장치.
- 제5항에 있어서,상기 절연 부재는 상기 기판과 상기 제1 격벽 사이에 배치되는디스플레이 장치.
- 제2항에 있어서,상기 돌출부는 상기 기판의 일부인디스플레이 장치.
- 제2항에 있어서,상기 기판 상에 제1 조립 패턴;상기 제1 조립 패턴에 연결되고 제1 방향을 따라 배치된 제1 조립 배선;상기 기판 상에 제2 방향을 따라 제1 조립 패턴과 마주보는 제2 조립 패턴; 및상기 제2 조립 패턴에 연결되고 상기 제1 방향을 따라 배치된 제2 조립 배선을 포함하는디스플레이 장치.
- 제8항에 있어서,상기 반도체 발광 소자는 상기 제1 방향을 따라 상기 제1 조립 배선과 상기 제2 조립 배선 사이의 복수의 조립 홀에 배치된 복수의 반도체 발광 소자를 포함하고,상기 돌출부는 상기 복수의 반도체 발광 소자 각각의 아래에 배치되는디스플레이 장치.
- 제8항에 있어서,상기 복수의 반도체 발광 소자는 동일한 컬러 광을 발광하는디스플레이 장치.
- 제8항에 있어서,상기 제2 격벽은,상기 제1 조립 배선 및 상기 제2 조립 배선 상에 제2-1 격벽; 및상기 기판 상에 배치된 제2-2 격벽을 포함하는디스플레이 장치.
- 제11항에 있어서,상기 제2-1 격벽의 두께는 상기 제1 격벽의 두께보다 큰디스플레이 장치.
- 제11항에 있어서,상기 제2-2 격벽의 두께는 제2-1 격벽의 두께보다 큰디스플레이 장치.
- 제11항에 있어서,상기 돌출부는상기 제1 조립 패턴 및 상기 제2 조립 패턴인디스플레이 장치.
- 제14항에 있어서,상기 제1 조립 패턴은,상기 제1 조립 배선의 두께보다 큰 두께를 갖고,상기 제2 조립 패턴은,상기 제2 조립 배선의 두께보다 큰 두께를 갖는 디스플레이 장치.
- 제11항에 있어서,상기 제1 격벽, 상기 제2-1 격벽 및 상기 제2-2 격벽 각각의 상면은 동일한 평면 상에 위치되고,상기 제1 격벽, 상기 제2-1 격벽 및 상기 제2-2 격벽 각각의 하면은 동일한 평면 상에 위치되지 않는디스플레이 장치.
- 제16항에 있어서,상기 제2-1 격벽의 하면은 상기 제1 격벽의 하면으로부터 아래로 돌출되는디스플레이 장치.
- 제17항에 있어서,상기 제2-2 격벽의 하면은 상기 제2-1 격벽의 하면으로부터 아래로 돌출되는디스플레이 장치.
- 제2항에 있어서,상기 돌출부의 폭은 상기 상기 조립 홀의 폭보다 큰디스플레이 장치.
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KR1020247011226A KR20240058909A (ko) | 2021-09-06 | 2021-09-06 | 디스플레이 장치 |
PCT/KR2021/012005 WO2023033212A1 (ko) | 2021-09-06 | 2021-09-06 | 디스플레이 장치 |
CN202180102105.6A CN117916887A (zh) | 2021-09-06 | 2021-09-06 | 显示装置 |
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US20160315218A1 (en) * | 2015-01-06 | 2016-10-27 | Apple Inc. | Led structures for reduced non-radiative sidewall recombination |
KR20190126260A (ko) * | 2019-10-22 | 2019-11-11 | 엘지전자 주식회사 | 마이크로 led를 이용한 디스플레이 장치 및 이의 제조 방법 |
KR20200021966A (ko) * | 2020-02-11 | 2020-03-02 | 엘지전자 주식회사 | 반도체 발광 소자를 이용한 디스플레이 장치 |
KR20200026681A (ko) * | 2019-06-28 | 2020-03-11 | 엘지전자 주식회사 | 디스플레이 장치 제조를 위한 기판 및 디스플레이 장치의 제조방법 |
KR20210027097A (ko) * | 2019-08-29 | 2021-03-10 | 가부시키가이샤 재팬 디스프레이 | 표시 장치 |
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2021
- 2021-09-06 CN CN202180102105.6A patent/CN117916887A/zh active Pending
- 2021-09-06 WO PCT/KR2021/012005 patent/WO2023033212A1/ko active Application Filing
- 2021-09-06 KR KR1020247011226A patent/KR20240058909A/ko unknown
Patent Citations (5)
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US20160315218A1 (en) * | 2015-01-06 | 2016-10-27 | Apple Inc. | Led structures for reduced non-radiative sidewall recombination |
KR20200026681A (ko) * | 2019-06-28 | 2020-03-11 | 엘지전자 주식회사 | 디스플레이 장치 제조를 위한 기판 및 디스플레이 장치의 제조방법 |
KR20210027097A (ko) * | 2019-08-29 | 2021-03-10 | 가부시키가이샤 재팬 디스프레이 | 표시 장치 |
KR20190126260A (ko) * | 2019-10-22 | 2019-11-11 | 엘지전자 주식회사 | 마이크로 led를 이용한 디스플레이 장치 및 이의 제조 방법 |
KR20200021966A (ko) * | 2020-02-11 | 2020-03-02 | 엘지전자 주식회사 | 반도체 발광 소자를 이용한 디스플레이 장치 |
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CN117916887A (zh) | 2024-04-19 |
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