Display device

Abstract

A display device includes a circuit substrate and a plurality of light emitting units. The light emitting units are located on the circuit substrate and electrically connected to the circuit substrate. Each of the light emitting units includes a main isolation structure and a plurality of light emitting elements, and the main isolation structure surrounds the plurality of light emitting elements.

Description

Technical Field

[0001] This invention relates to a display device, and more particularly to a flexible display device. Background Technology

[0002] Micro-LED displays offer advantages such as power saving, high efficiency, high brightness, and fast response time. Due to the extremely small spacing (<100μm) and point light source characteristics of micro-LEDs, current methods involve placing isolation structures (banks) between them to address crosstalk and viewcone issues between sub-pixels. However, the rigid, mesh-like isolation structure lacks flexibility, hindering the application of micro-LED displays in flexible displays. Summary of the Invention

[0003] The purpose of this invention is to provide a flexible display device.

[0004] An embodiment of the present invention provides a display device, comprising: a circuit board; and a plurality of light-emitting units located on the circuit board and electrically connected to the circuit board, wherein each light-emitting unit includes a main isolation structure and a plurality of light-emitting elements, and the main isolation structure surrounds the plurality of light-emitting elements.

[0005] In one embodiment of the present invention, the circuit board includes a flexible substrate and a driving circuit layer, the driving circuit layer being located between the flexible substrate and the light-emitting unit, and the light-emitting unit being electrically connected to the driving circuit layer.

[0006] In one embodiment of the present invention, the main isolation structures of the plurality of light-emitting units are separated from each other.

[0007] In one embodiment of the present invention, each of the above-mentioned light-emitting units further has a plurality of spare areas, and the number of spare areas of each light-emitting unit is greater than or equal to the number of light-emitting elements.

[0008] In one embodiment of the present invention, the aforementioned spare areas are all located within the main isolation structure.

[0009] In one embodiment of the present invention, the shortest spacing between the main isolation structures is greater than the shortest distance between the main isolation structure and the light-emitting element.

[0010] In one embodiment of the present invention, each of the above-mentioned light-emitting units further includes a plurality of sub-isolation structures, which divide the main isolation structure into a plurality of compartments.

[0011] In one embodiment of the present invention, the first compartment of the plurality of compartments houses a light-emitting element and a first spare area of ​​the plurality of spare areas.

[0012] In one embodiment of the present invention, the second spare area among the plurality of spare areas is located outside the main isolation structure.

[0013] In one embodiment of the present invention, the display device further includes a color conversion layer located within the first compartment and covering the light-emitting element.

[0014] In one embodiment of the present invention, the second compartment of the plurality of compartments contains a light-emitting element but does not contain a spare area.

[0015] In one embodiment of the present invention, the display device further includes a first cover layer located between the main isolation structures.

[0016] In one embodiment of the present invention, the display device further includes a second cover layer located within the main isolation structure and covering the light-emitting element.

[0017] In one embodiment of the present invention, the stretching ratio of the first covering layer is greater than that of the second covering layer.

[0018] In one embodiment of the present invention, the plurality of light-emitting elements of each of the above-mentioned light-emitting units have different light colors, and the light colors of the plurality of light-emitting elements of adjacent light-emitting units are symmetrically arranged.

[0019] In one embodiment of the present invention, the above-mentioned display device further includes a light-shielding layer located on a plurality of light-emitting units. The light-shielding layer has a plurality of first openings, and the first openings overlap the orthographic projection of the light-emitting elements on the orthographic projection of the circuit board with the orthographic projection of the circuit board.

[0020] In one embodiment of the present invention, the light-shielding layer further has a plurality of second openings, the projection of the second openings onto the circuit board being located outside the projection of the light-emitting unit onto the circuit board.

[0021] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0022] Figure 1A This is a partial top view of a display device according to an embodiment of the present invention.

[0023] Figure 1B It is along Figure 1A A schematic diagram of the cross section line A-A'.

[0024] Figure 2 This is a partial top view of a display device according to an embodiment of the present invention.

[0025] Figure 3 This is a partial top view of a display device according to an embodiment of the present invention.

[0026] Figure 4 This is a partial top view of a display device according to an embodiment of the present invention.

[0027] Figure 5A This is a partial top view of a display device according to an embodiment of the present invention.

[0028] Figure 5B It is along Figure 5A A schematic diagram of the cross section drawn by section line B-B'.

[0029] Figure 6A This is a partial top view of a display device according to an embodiment of the present invention.

[0030] Figure 6B It is along Figure 6A A schematic diagram of the cross section line C-C'.

[0031] Figure 7 This is a cross-sectional schematic diagram of the light-emitting unit of a display device according to an embodiment of the present invention.

[0032] Figure 8 This is a partial top view of a display device according to an embodiment of the present invention.

[0033] Figure 9 This is a partial top view of a display device according to an embodiment of the present invention.

[0034] Figure 10 This is a partial top view of a display device according to an embodiment of the present invention.

[0035] Figure 11A This is a partial top view of a display device according to an embodiment of the present invention.

[0036] Figure 11B It is along Figure 11A A schematic diagram of the cross section line D-D'.

[0037] The attached figures are labeled as follows:

[0038] 10A, 10B, 10C, 10D, 10E, 10F: Display devices

[0039] 10G, 10H, 10I, 10J, 10K: Display devices

[0040] A-A', B-B', C-C', D-D': Profile lines

[0041] BM, BM2: Light-shielding layers

[0042] C1, C2, C3, C4, C5, C6, C7, C8: Centerline

[0043] CT: Color conversion layer

[0044] D1: Spacing

[0045] D2: Distance

[0046] DL: Driver Circuit Layer

[0047] FS: Flexible substrate

[0048] LB, LD, LG, LR: Light-emitting elements

[0049] LU, LU1, LU2, LU3, UB1, UB2, UC1, UC2: Light-emitting units

[0050] MI1, MI2, MI3: Main isolation structure

[0051] O11, O12, O21, O22, O23: Opening

[0052] P1, P2, P3, P31, P4: Overlay layer

[0053] PD1, PD2, PD3, PD4, PD5, PD6, PD7: Pads

[0054] R11, R12, R13: Compartments

[0055] RA, RA1, RA2, RA3, RA4: Spare areas

[0056] RA5, RA6, RA7, RA8: Spare areas

[0057] SB: Circuit board

[0058] SI: Sub-isolation structure

[0059] SL1, SL2, SL3: Signal lines

[0060] UD1, UD2, UG1, UG2, UH1, UH2, UI1, UI2: Light-emitting units Detailed Implementation

[0061] Figure 1A This is a partial top view of a display device 10A according to an embodiment of the present invention. Figure 1B It is along Figure 1A A schematic diagram of the cross-section along section line A-A'. Please refer to... Figures 1A to 1B The display device 10A includes: a circuit board SB; and a plurality of light-emitting units LU, located on the circuit board SB and electrically connected to the circuit board SB, wherein each light-emitting unit LU includes a main isolation structure MI1 and a plurality of light-emitting elements LD, and the main isolation structure MI1 surrounds the plurality of light-emitting elements LD.

[0062] In a display device 10A according to an embodiment of the present invention, a main isolation structure MI1 of the light-emitting unit LU surrounds its light-emitting element LD, so that the light-emitting unit LU has a complete island-shaped structure, and the island-shaped structures of each light-emitting unit LU are independent of each other. In this way, when the display device 10A is bent, only the circuit board SB between the light-emitting units LU bends, while each light-emitting unit LU can still maintain its complete structure, thereby improving the flexibility of the display device 10A.

[0063] The following, in conjunction with Figures 1A to 1B The embodiments of the various components and film layers of the display device 10A will be further described, but the present invention is not limited thereto.

[0064] In this embodiment, the circuit board SB of the display device 10A may include a flexible substrate FS and a driving circuit layer DL, wherein the driving circuit layer DL may be located between the flexible substrate FS and the light-emitting unit LU, and the light-emitting unit LU may be electrically connected to the driving circuit layer DL.

[0065] In detail, the flexible substrate FS can be a transparent substrate or an opaque substrate, and its material can be polyimide (PI), polycarbonate (PC), polyester (PET), cyclic olefin copolymer (COC), metallocene-based cyclic olefin copolymer (mCOC) or other suitable materials, and the present invention is not limited thereto.

[0066] The driving circuit layer DL may include components or lines required by the display device 10A, such as driving elements, switching elements, storage capacitors, power lines, driving signal lines, timing signal lines, current compensation lines, detection signal lines, etc. For example, in this embodiment, the driving circuit layer DL may include signal lines SL1, SL2, SL3 and pads PD1, PD2, PD3, PD4, PD5, PD6, PD7, wherein pads PD1 and PD4 can be electrically connected to signal line SL1, pads PD2 and PD5 can be electrically connected to signal line SL2, pads PD3 and PD6 can be electrically connected to signal line SL3, and pad PD7 can be electrically connected to other signal lines, such as power lines.

[0067] In this embodiment, the light-emitting element LD of the light-emitting unit LU may include three light-emitting elements LR, LG, and LB, but is not limited thereto. The light-emitting element LR is, for example, a red light-emitting diode, the light-emitting element LG is, for example, a green light-emitting diode, and the light-emitting element LB is, for example, a blue light-emitting diode. In this way, the light-emitting elements LR, LG, and LB can each constitute a sub-pixel of the display device 10A, and the light-emitting unit LU can constitute a pixel of the display device 10A.

[0068] Light-emitting elements LR, LG, and LB are fabricated on a growth substrate and then transferred to a circuit board SB via a mass transfer process, and are electrically connected to signal lines SL1, SL2, and SL3, respectively. For example, signal line SL1 can be electrically connected to pad PD1 or pad PD4, signal line SL2 can be electrically connected to pad PD2 or pad PD5, and signal line SL3 can be electrically connected to pad PD3 or pad PD6. The anode of light-emitting element LR can be electrically connected to pad PD1 or pad PD4, the anode of light-emitting element LG can be electrically connected to pad PD2 or pad PD5, the anode of light-emitting element LB can be electrically connected to pad PD3 or pad PD6, and the cathodes of light-emitting elements LR, LG, and LB can all be electrically connected to pad PD7. In this embodiment, the anode of light-emitting element LR is electrically connected to pad PD1, the anode of light-emitting element LG is electrically connected to pad PD5, the anode of light-emitting element LB is electrically connected to pad PD3, and the cathodes of light-emitting elements LR, LG, and LB are all electrically connected to pad PD7. Other conductive materials, such as solder or conductive adhesive, may also be included between the light-emitting elements LR, LG, LB and the pads PD1, PD2, PD3, PD4, PD5, PD6, PD7.

[0069] The light-emitting unit LU may also have multiple spare areas RA, and the number of spare areas RA in each light-emitting unit LU may be greater than or equal to the number of light-emitting elements LD. For example, in this embodiment, the light-emitting unit LU includes three light-emitting elements LR, LG, and LB, and the light-emitting unit LU has three spare areas RA. When misalignment, tilting, or omission occurs during the transfer of light-emitting elements LR, LG, and LB, a repair process can be used to reposition the light-emitting elements LR, LG, or LB in the spare areas RA to repair the sub-pixels that cannot function properly.

[0070] In this embodiment, the main isolation structure MI1 of the light-emitting unit LU surrounds all its light-emitting elements LD and spare areas RA, and the main isolation structures MI1 of the light-emitting units LU are separated from each other, so that each light-emitting unit LU has a complete and independent island structure. When the display device 10A is bent, the bending mainly occurs on the circuit board SB between the light-emitting units LU, and the light-emitting unit LU can still maintain its complete structure. In addition, the related circuits of the light-emitting elements LD can be concentrated under the island structure of the light-emitting unit LU to avoid stress damage caused by bending. Furthermore, since the light-emitting elements LD and spare areas RA of each light-emitting unit LU are all located within the main isolation structure MI1, it can also ensure that the optical efficiency of the light-emitting elements LD is relatively consistent after the repair process.

[0071] In this embodiment, the main isolation structure MI1 has a square ring shape. However, the shape of the main isolation structure MI1 is not particularly limited and can be determined according to the actual configuration requirements of the light-emitting unit LU. In some embodiments, the main isolation structures MI1 may have a minimum spacing D1 between them, and the main isolation structure MI1 and the light-emitting element LD may have a minimum distance D2, and the spacing D1 may be greater than the distance D2 to allow the display device 10A to provide sufficient flexibility. In addition, the material of the main isolation structure MI1 may include inorganic materials, organic materials, or combinations or stacks of different materials. For example, inorganic materials may include oxides or nitrides, such as silicon oxide (SiOx) or silicon nitride (SiNx), but are not limited thereto. Organic materials may include photoresist materials, curable resin materials, or other suitable materials.

[0072] In some embodiments, the display device 10A may further include a cover layer P1, which may be located between the main isolation structures MI1. The material of the cover layer P1 may include a material with high tensile strength, such as an adhesive, photoresist, or ink. In some embodiments, the cover layer P1 may have a tensile strength between 70 MPa and 100 MPa, an elongation between 20% and 100%, or a Young's modulus between 2 GPa and 3 GPa.

[0073] In some embodiments, the display device 10A may further include a cover layer P2, which may be located within the main isolation structure MI1 and cover the light-emitting element LD and the substrate SB to adjust the light extraction efficiency of the light-emitting element LD. The material of the cover layer P2 may include optical materials, such as photoresist, and the stretching coefficient of the cover layer P1 is preferably greater than that of the cover layer P2. In some embodiments, the cover layer P2 may also have a tensile strength between 30 MPa and 60 MPa, a stretching coefficient of less than 10%, or a Young's modulus between 2 GPa and 3 GPa.

[0074] The following uses Figures 2 to 11B Further embodiments of the present invention will be described, and the following will be used... Figures 1A to 1B The component designations and related content of the embodiments are as follows: the same designations are used to represent the same or similar components, and descriptions of identical technical content are omitted. For explanations of the omitted parts, please refer to... Figures 1A to 1B The embodiments described below will not be repeated.

[0075] Figure 2 This is a partial top view schematic diagram of a display device 10B according to an embodiment of the present invention. Figures 1A to 1B Compared to the display device 10A shown, Figure 2 The difference of the display device 10B shown is that the display device 10B includes light-emitting units UB1 and UB2, wherein the configuration of the light-emitting elements LR, LG, and LB of the light-emitting unit UB1 is different from that of the light-emitting unit LU, and the configuration of the light-emitting elements LR, LG, and LB of the light-emitting unit UB2 is the same as that of the light-emitting unit LU.

[0076] In this embodiment, the light-emitting elements LR, LG, and LB of adjacent light-emitting units UB1 and UB2 are configured differently, and the light-emitting elements LR, LG, and LB of light-emitting units UB1 and UB2 are arranged in a mirror-symmetrical configuration with respect to the center line C1 between light-emitting units UB1 and UB2. In this way, the main isolation structure MI1 can adjust the light emission pattern and viewing angle of the light-emitting elements LR, LG, and LB. Furthermore, the aforementioned symmetrical configuration can effectively compensate for the differences in monochromatic light field patterns caused by the annular main isolation structure MI1 on the individual light-emitting elements LR, LG, and LB.

[0077] Figure 3 This is a partial top view schematic diagram of a display device 10C according to an embodiment of the present invention. Figures 1A to 1B Compared to the display device 10A shown, Figure 3 The difference of the display device 10C shown is that the display device 10C includes light-emitting units UC1 and UC2, wherein the configuration of the light-emitting elements LR, LG, and LB of the light-emitting unit UC1 is different from that of the light-emitting unit LU, and the configuration of the light-emitting elements LR, LG, and LB of the light-emitting unit UC2 is the same as that of the light-emitting unit LU.

[0078] In this embodiment, the light-emitting elements LR, LG, and LB of light-emitting unit UC1 and light-emitting unit UC2 are configured differently, and the light-emitting elements LR, LG, and LB of light-emitting unit UC1 and light-emitting unit UC2 are arranged in a mirror-symmetrical configuration with respect to the center line C2 between light-emitting units UB1 and UB2 and a center line C3 perpendicular to the center line C2. In this way, the main isolation structure MI1 can adjust the light emission pattern and viewing angle of the light-emitting elements LR, LG, and LB. Furthermore, the aforementioned symmetrical configuration can effectively compensate for the differences in monochromatic light field patterns caused by the annular main isolation structure MI1 on the individual light-emitting elements LR, LG, and LB.

[0079] Figure 4 This is a partial top view schematic diagram of a display device 10D according to an embodiment of the present invention. Figures 1A to 1B Compared to the display device 10A shown, Figure 4 The difference of the display device 10D shown is that the display device 10D includes light-emitting units UD1 and UD2, wherein the configuration of the light-emitting elements LR, LG, and LB of the light-emitting units UD1 and UD2 is different from that of the light-emitting unit LU.

[0080] In this embodiment, the light-emitting elements LR, LG, and LB of light-emitting unit UD1 and light-emitting unit UD2 are configured differently, and the light-emitting elements LR, LG, and LB of light-emitting unit UD1 and light-emitting unit UD2 are arranged in a mirror-symmetrical configuration with respect to the center line C4 between light-emitting units UB1 and UB2 and a center line C5 perpendicular to the center line C4. In this way, the main isolation structure MI1 can adjust the light emission pattern and viewing angle of the light-emitting elements LR, LG, and LB. Furthermore, the aforementioned symmetrical configuration can effectively compensate for the differences in monochromatic light field patterns caused by the annular main isolation structure MI1 on the individual light-emitting elements LR, LG, and LB.

[0081] Figure 5A This is a partial top view of a display device 10J according to an embodiment of the present invention. Figure 5B It is along Figure 5A A schematic diagram of the cross-section along section line B-B'. (Similar to...) Figures 1A to 1B Compared to the display device 10A shown, Figures 5A to 5B The difference of the display device 10J shown is that the display device 10J also includes a light-shielding layer BM.

[0082] In this embodiment, the light-shielding layer BM is located on the light-emitting unit LU. The light-shielding layer BM can shield the reflection of ambient light by the metal traces and the main isolation structure MI1, thereby reducing dark-state brightness and improving contrast. In addition, the light-shielding layer BM can have multiple openings O11, and the orthogonal projection of the openings O11 onto the circuit board SB can overlap with the orthogonal projection of the light-emitting elements LR, LG, and LB onto the circuit board SB, so as not to affect the light emission of the light-emitting elements LR, LG, and LB, and at the same time, it can also reduce stress damage when the display device 10J is bent.

[0083] In some embodiments, the light-shielding layer BM may also have multiple openings O12, and the orthographic projection of the openings O12 onto the circuit substrate SB may be located outside the orthographic projection of the light-emitting unit LU onto the circuit substrate SB. In this way, the stress change when the display device 10J is bent can be further reduced.

[0084] Figure 6A This is a partial top view of a display device 10E according to an embodiment of the present invention. Figure 6B It is along Figure 6A A schematic diagram of the cross-section along section line C-C'. Please refer to... Figures 6A to 6B The display device 10E includes a circuit board SB and multiple light-emitting units LU1 and LU2. The circuit board SB includes a flexible substrate FS and a driving circuit layer DL. The light-emitting units LU1 and LU2 are located on the circuit board SB and are electrically connected to the driving circuit layer DL of the circuit board SB. Each light-emitting unit LU1 and LU2 includes a main isolation structure MI2, multiple light-emitting elements LD, and multiple spare areas RA, and the main isolation structure MI2 surrounds the multiple light-emitting elements LD.

[0085] With Figures 1A to 1B Compared to the display device 10A shown, Figures 6A to 6B The difference between the display device 10E and the main isolation structure MI2 of the light-emitting units LU1 and LU2 of the display device 10E and the main isolation structure MI1 of the display device 10A is different in shape. The light-emitting units LU1 and LU2 also include two sub-isolation structures SI, and a portion of the spare area RA is located outside the main isolation structure MI2.

[0086] For example, in this embodiment, the secondary isolation structure SI can divide the main isolation structure MI2 into compartments R11, R12, and R13, where compartments R12 and R13 are located on opposite sides of compartment R11, giving the main isolation structure MI2 a shape with one half narrow and the other half wide. Compartment R11 can accommodate one light-emitting element LB and one spare area RA1, while compartments R12 and R13 accommodate one light-emitting element LB and LG respectively, without a spare area RA. Furthermore, the spare area RA2 can be located outside the main isolation structure MI2, that is, between the main isolation structures MI2 of light-emitting units LU1 and LU2. Additionally, the compartments R12 and R13 of light-emitting unit LU1 and light-emitting unit LU2 can be staggered to increase the flexible space between light-emitting units LU1 and LU2.

[0087] There is no particular limitation on the number of sub-isolation structures SI, which can be determined based on the actual configuration requirements of the light-emitting units LU1 and LU2. For example, when each of the light-emitting units LU1 and LU2 includes more light-emitting elements LD, more sub-isolation structures SI can be set to divide the main isolation structure MI2 into more compartments to accommodate one or more light-emitting elements LD and / or the spare area RA1. In addition, the material of the sub-isolation structures SI can be the same as or different from that of the main isolation structure MI2.

[0088] In this embodiment, the display device 10E may further include a color conversion layer CT, which is located within the compartment R11 and covers the light-emitting element LB. The color conversion layer CT may include phosphor or a similar wavelength conversion material to convert the blue light emitted by the light-emitting element LB into, for example, red light, enabling the display device 10E to achieve a full-color display effect.

[0089] In some embodiments, the display device 10E may further include cover layers P3 and P4, wherein cover layer P3 may be located within compartments R12 and R13 and cover light-emitting elements LB and LG, and cover layer P4 may be located between the main isolation structures MI2. The stretching coefficient of cover layer P4 is preferably greater than that of cover layer P3, and the refractive index difference between cover layer P3 and cover layer P4 may be less than 0.2, to ensure that the light-emitting elements disposed in the spare area RA2 have similar optical efficiencies to the light-emitting elements disposed within the main isolation structures MI2.

[0090] Figure 7 This is a cross-sectional schematic diagram of the light-emitting unit LU3 of a display device 10F according to an embodiment of the present invention. (The last sentence appears to be incomplete and possibly refers to a different document.) Figure 6B Compared to the light-emitting unit LU1 of the display device 10E shown, Figure 7The difference in the light-emitting unit LU3 of the display device 10F shown is that the cover layer P31 of the light-emitting unit LU3 is located within compartments R12 and R13 and covers the light-emitting element LB in compartment R12, the light-emitting element LG in compartment R13, and the color conversion layer CT in compartment R11. In this way, the cover layer P31 can reduce the refractive index difference between the color conversion layer CT and air, and helps to improve the light extraction efficiency and adjust the light field pattern.

[0091] Figure 8 This is a partial top view schematic diagram of a display device 10G according to an embodiment of the present invention. Figures 6A to 6B Compared to the display device 10E shown, Figure 8 The difference of the display device 10G shown is that the display device 10G includes light-emitting units UG1 and UG2, wherein the arrangement position of the light-emitting element LB in the compartment R11 of the light-emitting units UG1 and UG2 is different from that of the light-emitting units LU1 and LU2, and the number of spare areas RA of the light-emitting units UG1 and UG2 is greater than the number of light-emitting elements LD.

[0092] In this embodiment, the light-emitting elements LB in the compartment R11 of light-emitting units UG1 and UG2 are arranged in a mirror-symmetrical configuration with respect to the center line C6. Therefore, the main isolation structure MI2 can adjust the light field pattern and viewing angle of the light-emitting elements LB in the compartment R11 of light-emitting units UG1 and UG2 after conversion by the color conversion layer CT, and can effectively compensate for the differences in light field pattern between the compartments R11 of light-emitting units UG1 and UG2.

[0093] In this embodiment, when there is sufficient space, the light-emitting units UG1 and UG2 can each have two spare areas RA3 and RA4 located in the compartment R11 and four spare areas RA5, RA6, RA7 and RA8 located outside the main isolation structure MI2, so as to facilitate the transfer and repair of the light-emitting element LD.

[0094] Figure 9 This is a partial top view schematic diagram of a display device 10H according to an embodiment of the present invention. Figures 6A to 6B Compared to the display device 10E shown, Figure 9 The difference of the display device 10H shown is that the display device 10H includes light-emitting units UH1 and UH2. The shape of the main isolation structure MI3 of the light-emitting units UH1 and UH2 is different from the shape of the main isolation structure MI2 of the light-emitting units LU1 and LU2. Furthermore, the position of the secondary isolation structure SI of the light-emitting units UH1 and UH2 is different from that of the light-emitting units LU1 and LU2.

[0095] In this embodiment, the compartments R12 and R13 of the light-emitting units UH1 and UH2 are arranged in an alternating manner to increase the flexible space between the light-emitting units UH1 and UH2. Since the main isolation structure MI3 and the main isolation structure MI2 have different shapes and the secondary isolation structure SI is positioned differently, the light-emitting elements LG of light-emitting unit UH1 and LB of light-emitting unit UH2 are mirror-symmetrically arranged with respect to the light-emitting elements LG of light-emitting unit LU1 and LB of light-emitting unit LU2 about the center line C7. This allows for adjustment of the light emission pattern of the light-emitting elements LB and LG in compartments R12 and R13, and the light-emitting element LB in compartment R11, while compensating for the monochromatic light field pattern differences caused by the main isolation structure MI3 on ​​the individual light-emitting elements LB and LG in compartments R12 and R13, and the light-emitting element LB in compartment R11.

[0096] Figure 10 This is a partial top view schematic diagram of a display device 10I according to an embodiment of the present invention. Figure 9 Compared to the display device 10H shown, Figure 10 The difference of the display device 10I shown is that the display device 10I includes light-emitting units UI1 and UI2, wherein the configuration of the light-emitting elements LG and LB of the light-emitting unit UI1 is the same as that of the light-emitting unit UH1, and the configuration of the light-emitting elements LG and LB of the light-emitting unit UI2 is different from that of the light-emitting unit UH2.

[0097] In this embodiment, the light-emitting element LB in the compartment R11 of the light-emitting unit UI2 and the light-emitting element LB in the compartment R11 of the light-emitting unit UH2 are arranged in a mirror symmetrical configuration with respect to the center line C8. This allows for fine adjustment of the light emission field pattern of the light-emitting element LB in the compartment R11 and compensates for the difference in monochromatic light field pattern caused by the main isolation structure MI3 to the light-emitting element LB in the compartment R11.

[0098] Figure 11A This is a partial top view of a display device 10K according to an embodiment of the present invention. Figure 11B It is along Figure 11A A schematic diagram of the cross-section drawn along section line D-D'. (Similar to...) Figures 6A to 6B Compared to the display device 10E shown, Figures 11A to 11B The difference in the display device 10K shown is that the display device 10K also includes a light-shielding layer BM2.

[0099] In this embodiment, the light-shielding layer BM2 is located on the light-emitting units LU1 and LU2. The light-shielding layer BM2 can block the reflection of ambient light from the metal traces and the main isolation structure MI2, thereby reducing the brightness in dark states and improving the contrast. In addition, the light-shielding layer BM2 can have multiple openings O21, O22, and O23. Opening O21 can overlap the light-emitting element LB in the compartment R11 and the spare area RA1, opening O22 can overlap the light-emitting element LB in the compartment R12, and opening O23 can overlap the spare area RA2 between the main isolation structures MI2 of the light-emitting units LU1 and LU2, so as to avoid affecting the light emission of the light-emitting units LU1 and LU2, and at the same time improve the stress adjustment capability of the display device 10K when bent.

[0100] In summary, the display device of the present invention uses a main isolation structure surrounding the light-emitting element of the light-emitting unit, so that the light-emitting unit has a complete island-like structure, and the island-like structures of each light-emitting unit are independent of each other. In this way, when the display device is bent, the bending mainly occurs on the circuit board between the light-emitting units, while the light-emitting units can still maintain their complete structure, giving the display device good flexibility.

[0101] Although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the present invention. Those skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A display device, comprising: Circuit board; as well as Multiple light-emitting units are located on the circuit board and electrically connected to the circuit board. Each of the light-emitting units includes a main isolation structure and multiple light-emitting elements, and the main isolation structure surrounds the multiple light-emitting elements; Each of the light-emitting units further includes multiple sub-isolation structures, which divide the main isolation structure into multiple compartments. Each of the light-emitting units also has multiple spare areas, and the first compartment of the multiple compartments houses one of the light-emitting elements and the first spare area of ​​the multiple spare areas.

2. The display device of claim 1, wherein the circuit board comprises a flexible substrate and a driving circuit layer, the driving circuit layer being located between the flexible substrate and the light-emitting unit, and the light-emitting unit being electrically connected to the driving circuit layer.

3. The display device of claim 1, wherein the main isolation structure of the plurality of light-emitting units is separated from each other.

4. The display device of claim 1, wherein each of the light-emitting units further has a plurality of spare areas, and the number of spare areas of each of the light-emitting units is greater than or equal to the number of light-emitting elements.

5. The display device as claimed in claim 4, wherein the spare areas are all located within the main isolation structure.

6. The display device of claim 5, wherein the shortest spacing between the main isolation structures is greater than the shortest distance between the main isolation structure and the light-emitting element.

7. The display device of claim 1, wherein the second spare area of ​​the plurality of spare areas is located outside the main isolation structure.

8. The display device of claim 1, further comprising a color conversion layer located within the first compartment and covering the light-emitting element.

9. The display device of claim 1, wherein the second of the plurality of compartments houses one of the light-emitting elements and does not house the spare area.

10. The display device of claim 1, further comprising a first cover layer located between the main isolation structures.

11. The display device of claim 10, further comprising a second cover layer located within the main isolation structure and covering the light-emitting element.

12. The display device of claim 11, wherein the stretching ratio of the first cover layer is greater than the stretching ratio of the second cover layer.

13. The display device of claim 1, wherein the plurality of light-emitting elements of each of the light-emitting units have different light colors, and the light colors of the plurality of light-emitting elements of adjacent light-emitting units are symmetrically arranged.

14. The display device of claim 1, further comprising a light-shielding layer located on the plurality of light-emitting units, the light-shielding layer having a plurality of first openings, and the orthographic projection of the first openings onto the circuit substrate overlaps the orthographic projection of the light-emitting elements onto the circuit substrate.

15. The display device of claim 14, wherein the light-shielding layer further has a plurality of second openings, the orthographic projection of the second openings onto the circuit substrate being located outside the orthographic projection of the light-emitting unit onto the circuit substrate.

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