WO2023015626A1 - 曲面显示模组 - Google Patents
曲面显示模组 Download PDFInfo
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- WO2023015626A1 WO2023015626A1 PCT/CN2021/116205 CN2021116205W WO2023015626A1 WO 2023015626 A1 WO2023015626 A1 WO 2023015626A1 CN 2021116205 W CN2021116205 W CN 2021116205W WO 2023015626 A1 WO2023015626 A1 WO 2023015626A1
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- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
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- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- 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
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- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1218—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition or structure of the substrate
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- H—ELECTRICITY
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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- H10K59/131—Interconnections, e.g. wiring lines or terminals
Definitions
- the invention relates to the field of display technology, in particular to a curved surface display module.
- Embodiments of the present invention provide a curved display module to solve the technical problem of breakage or distortion of the display panel in the existing curved display module while achieving large stretching ratios in different directions.
- An embodiment of the present invention provides a curved display module, including a display area, wherein the curved display module includes:
- a stretchable display panel including a plurality of pixel islands for carrying light-emitting units, and a connecting bridge connecting two adjacent pixel islands;
- the first supporting layer is disposed on the first side of the stretchable display panel;
- the display area includes a first stretch area and a second stretch area, and when the curved surface display module is not subjected to external force, the stretch degree of the connecting bridge in the first stretch area is smaller than that of the the degree of stretching of the connecting bridges in the second stretching zone;
- the distance between two adjacent pixel islands in the first stretching area is smaller than the distance between two adjacent pixel islands in the second stretching area the distance between;
- the part of the first support layer located in the first stretch zone is less stretched than the part of the first support layer located in the second stretch zone degree of stretching.
- the length of the connecting bridge between two adjacent pixel islands in the first stretching zone is equal to the length of two adjacent pixel islands in the second stretching zone. The length of the connecting bridge between the islands.
- a plurality of connecting wires are provided on the connecting bridge, and the connecting wires are respectively electrically connected to the pixel driving circuits in the two adjacent pixel islands, and are displayed on the curved surface.
- the stretching degree of the connecting wires in the first stretching area is smaller than the stretching degree of the connecting wires in the second stretching area.
- the length of the connection wiring between two adjacent pixel islands in the first stretching area is equal to the length of two adjacent pixel islands in the second stretching area.
- the curved surface display module also includes:
- a second support layer disposed on a second side of the stretchable display panel opposite to the first side
- the part of the second support layer located in the first stretch zone is less stretched than the part of the second support layer located in the second stretch zone degree of stretching.
- both the first support layer and the second support layer are thermoplastic substrates.
- the stretchable display panel includes a substrate disposed on one side of the first support layer, the substrate includes a substrate island located on the pixel island, a substrate island located on the connection a substrate bridge of the bridge, and a hollowed-out area between said substrate island and said substrate bridge,
- the pixel island includes: the substrate island, and the pixel driving circuit and the light emitting unit stacked on the substrate island in sequence;
- the connecting bridge includes: the substrate bridge, and a plurality of connecting wires arranged on the substrate bridge, and the connecting wires are respectively connected to the pixel driving circuits on two adjacent substrate islands. electrical connection.
- the curved display module further includes a first cured adhesive layer for bonding the stretchable display panel and the first support layer, and bonding the stretchable display panel and the second cured adhesive layer of the second support layer, at least one of the first cured adhesive layer and the second cured adhesive layer is also filled in the hollow area.
- the embodiment of the present invention also provides another curved display module, including a display area, and the curved display module includes:
- a stretchable display panel including a plurality of pixel islands for carrying light-emitting units and a connecting bridge connecting two adjacent pixel islands;
- the first supporting layer is disposed on the first side of the stretchable display panel;
- the display area includes a first stretch area and a second stretch area, and when the curved surface display module is not subjected to external force, the stretch degree of the connecting bridge in the first stretch area is smaller than that of the The degree of stretching of the connecting bridges in the second stretching zone.
- the distance between two adjacent pixel islands in the first stretching zone is smaller than that in the second stretching zone The distance between two adjacent pixel islands within.
- the length of the connecting bridge between two adjacent pixel islands in the first stretching zone is equal to the length of the connecting bridge between two adjacent pixel islands in the second stretching zone. The length of the connecting bridge.
- a plurality of connecting wires are provided on the connecting bridge, and the connecting wires are respectively electrically connected to the pixel driving circuits in the two adjacent pixel islands, and are displayed on the curved surface.
- the stretching degree of the connecting wires located in the first stretching zone is smaller than the stretching degree of the connecting wires in the second stretching zone.
- the stretching degree of the part of the first supporting layer located in the first stretching zone is smaller than that of the part of the first supporting layer located in the first stretching zone. The degree of stretching of the portion of the second stretching zone.
- the curved display module further includes a second support layer, and the second support layer is disposed on a second side of the stretchable display panel opposite to the first side;
- the part of the second support layer located in the first stretch zone is less stretched than the part of the second support layer located in the second stretch zone degree of stretching.
- both the first support layer and the second support layer are thermoplastic substrates.
- the stretchable display panel includes a substrate disposed on one side of the first support layer, the substrate includes a substrate island located on the pixel island, a substrate island located on the connection The substrate bridge of the bridge, and the hollow area between the substrate island and the substrate bridge, the pixel island includes the substrate island, the pixel driving circuit stacked on the substrate island in sequence, and A light-emitting unit, the connection bridge includes the substrate bridge and a plurality of connection lines arranged on the substrate bridge, and the connection lines are respectively connected to the pixels on the adjacent two substrate islands to drive The circuit is electrically connected.
- the curved display module further includes a first cured adhesive layer for bonding the stretchable display panel and the first support layer, and bonding the stretchable display panel and the second cured adhesive layer of the second support layer, at least one of the first cured adhesive layer and the second cured adhesive layer is also filled in the hollow area.
- an organic filling layer is provided between the connection trace and the substrate bridge, and the side of the connection trace away from the substrate bridge is covered with an organic layer.
- the second stretching zone surrounds the first stretching zone, the stretching degree of the first stretching zone is zero, and the stretching degree of the second stretching zone is zero. Greater than zero.
- the curved display module provided by the embodiment of the present invention includes a stretchable display panel and a first supporting layer arranged on one side of the stretchable display panel.
- the display area of the curved display module includes a first stretching area and a second stretching area. zone, the stretching degree of the connecting bridge in the first stretching zone is smaller than that of the connecting bridge in the second stretching zone, which can reduce the distortion of the display panel during stretching while realizing 3D stereoscopic display such as tetrahedral curvature The risk of deformation can improve the reliability of the curved display module.
- FIG. 1 is a film stack composition diagram of a curved display module provided by an embodiment of the present invention
- FIG. 2 is a schematic structural diagram of a curved surface display module provided by an embodiment of the present invention.
- Fig. 3 is a structural schematic diagram of the first stretching zone and the second stretching zone of the stretchable display panel provided by the embodiment of the present invention
- FIG. 4 is a schematic cross-sectional view of a curved display module provided by an embodiment of the present invention.
- FIG. 5 is a schematic cross-sectional view of a stretchable display panel provided by an embodiment of the present invention.
- Fig. 6 is a schematic structural diagram of the preparation process of the stretchable display panel provided by the embodiment of the present invention.
- FIG. 7 is a schematic structural diagram of a stretchable display panel after removing the glass substrate provided by an embodiment of the present invention.
- Fig. 8 is a schematic structural diagram of the lamination of the stretchable display panel and the first supporting layer provided by the embodiment of the present invention.
- FIG. 9 is a schematic structural view of a stretchable display panel with a protective film removed according to an embodiment of the present invention.
- thermoforming process of the curved display module provided by the embodiment of the present invention.
- the present application provides a curved surface display module.
- the present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.
- the present invention aims at the technical problem of breakage or distortion of the display panel when the existing curved surface display module achieves a large stretch rate, and proposes this embodiment to overcome this defect.
- an embodiment of the present invention provides a curved display module 100, including a stretchable display panel 30, a second support layer 50, and a first support layer 10, wherein the stretchable display panel 30 includes opposite The first side and the second side of the stretchable display panel 30, the first supporting layer 10 is arranged on the first side of the stretchable display panel 30, and the second supporting layer 50 is arranged on the first side of the stretchable display panel 30. two sides.
- the stretchable display panel 30 includes an array of pixel islands 301 and a connecting bridge 302 connecting two adjacent pixel islands 301 .
- the stretchable display panel 30 includes an array of light-emitting units, and each pixel island 301 is provided with at least one light-emitting unit.
- the embodiment of the present invention is described by taking one light-emitting unit on each pixel island 301 as an example. .
- any one of the light-emitting units includes a first sub-pixel, a second sub-pixel, and a third sub-pixel with different colors, and the first sub-pixel, the second sub-pixel, and the third sub-pixel The pixels are respectively selected from any one of red, green and blue sub-pixels.
- the light emitting unit may further include a fourth sub-pixel, and the fourth sub-pixel may be a white sub-pixel.
- the connecting bridge 302 is a bending bridge having at least two different bending directions, so that the stretchable display panel 30 has a good stretching effect.
- the connecting bridge 302 is stretched and deformed, and the pixel island 301 is not stretched and deformed, so the pixel units located on the pixel island 301 are not affected by stretching.
- the embodiments of the present invention are provided on both sides of the stretchable display panel 30
- the second supporting layer 50 and the first supporting layer 10 enhance the reliability of the stretchable display panel 30 .
- the curved display module 100 includes a display area, and the display area includes a first stretch area 101 and a second stretch area 102.
- the first stretch The stretching degree of the connecting bridges 302 in the zone 101 is less than the stretching degree of the connecting bridges 302 in the second stretching zone 102 .
- the curvature of a bending portion of the connecting bridge 302 in the first stretching zone 101 is greater than the curvature of the corresponding bending portion of the connecting bridge 302 in the second stretching zone 102, that is, the first stretching zone 101
- the bending degree of the bending portion of the connecting bridge 302 in the second stretching zone 102 is greater than the bending degree of the corresponding bending portion of the connecting bridge 302 in the second stretching zone 102 .
- the distance S1 between two adjacent pixel islands 301 in the first stretching zone 101 It is smaller than the distance S2 between two adjacent pixel islands 301 in the second stretching zone 102 .
- the length of the connecting bridge 302 between two adjacent pixel islands 301 in the first stretching zone 101 is equal to the length of the connecting bridge 302 between two adjacent pixel islands 301 in the second stretching zone.
- the length of the connecting bridge 302 refers to the length of the component in a just straightened state.
- the ultimate tensile strength of the connecting bridges in the curved display module 100 is the same.
- the first stretch The stretching degree of the connecting bridge 302 in the zone 101 is smaller than the stretching degree of the connecting bridge 302 in the second stretching zone 102, that is to say, the stretching degree of the connecting bridge 302 in the first stretching zone 101
- the remaining stretchability of the connecting bridge 302 is greater than the remaining stretching degree of the connecting bridge 302 in the second stretching zone 102 .
- Tensile ultimate strength refers to the maximum stress value of a material when it is stretched and broken, and it is used to characterize the ability of a material or component to resist damage when it is subjected to tension.
- the second support layer 50 and the first support layer 10 are respectively arranged on two opposite sides of the stretchable display panel 30 to support the stretchable display panel 30 and improve the stretchability of the display panel 30.
- the strength of the display panel reduces the risk of twisting and deformation of the stretchable display panel 30 during stretching.
- the number of the first stretching zone 101 and the number of the second stretching zone 102 are not limited, and may be one, two, or multiple.
- the stretchable display panel 30 Before the stretchable display panel 30 is bonded to the first supporting layer 10 and the second supporting layer 50, it is used as a separate component, and the stretchable deformability of each connecting bridge 302 in the display area is the same, that is, The stretching degree of each connecting bridge 302 in the display area is the same.
- the corresponding regions of the stretchable display panel 30 need to be stretched to different degrees. Stretch to achieve a three-dimensional surface display.
- the stretchable display panel 30 forms the first stretching zone 101 and the second stretching zone 102 after stretching, because the stretchable display panel 30 before stretching, each connecting bridge can stretch
- the elongation and deformation capabilities are the same, so when the curved display module 100 is formed after stretching, the greater the stretching degree of the connecting bridge is, the greater the corresponding deformation degree will be.
- the first support layer 10 and the second support layer 50 should maintain non-stretchable properties under normal use conditions (normal temperature or room temperature, without external force), and have a certain rigidity, so as to improve the performance of curved display modules. reliability.
- Both the first support layer 10 and the second support layer 50 are thermoplastic substrates, and thermoplastic substrates can flow and deform when heated, soften or melt into any shape, solidify after cooling, and keep the shape unchanged, which is conducive to the preparation of The curved surface display module 100 with a fixed curvature.
- the whole of the second supporting layer 50 and the first supporting layer 10 bonded to the stretchable display panel 30 can be formed into a static display product with a fixed curvature through a thermoforming process.
- the materials of the second support layer 50 and the first support layer 10 include A-PET (Amorphous Polyethylene Any of Terephthalate, non-crystalline polyethylene terephthalate), PMMA (Polymethyl Methacrylate, polymethyl methacrylate), PC (Polycarbonate, polycarbonate), PP (Polypropylene, polypropylene) Material.
- A-PET Amorphous Polyethylene Any of Terephthalate, non-crystalline polyethylene terephthalate
- PMMA Polymethyl Methacrylate, polymethyl methacrylate
- PC Polycarbonate, polycarbonate
- PP Polypropylene, polypropylene
- the stretchable display panel 30 includes a substrate 31, a pixel driving circuit 32 disposed on the substrate 31, and a light emitting unit 33 disposed on the pixel driving circuit 32, wherein the Both the pixel driving circuit 32 and the light emitting unit 33 are located in the pixel island 301 .
- FIG. 3 is a schematic plan view of the stretchable display panel in the first stretching zone and the second stretching zone in FIG. 2
- FIG. 4 is a schematic cross-sectional view of the curved display module.
- the substrate 31 includes a substrate island 311 located on the pixel island 301, a substrate bridge 312 located on the connection bridge 302, and a hollow area 313 located between the substrate island 311 and the substrate bridge 312,
- the substrate bridge 312 connects two adjacent substrate islands 311 .
- the substrate bridge 312 is provided with a plurality of connecting wires, and the bending direction and extending direction of each connecting wire are the same as the bending direction and extending direction of the substrate bridge 312.
- the substrate bridge 312 is stretched together with the connecting traces thereon.
- an organic film layer can be provided on the side of the connecting wire close to the substrate bridge 312 and the side away from the substrate bridge 312 , play a role in relieving tensile stress.
- the stretching degree of the connecting wires in the first stretching area 101 is smaller than the stretching of the connecting wires in the second stretching area 102 degree.
- the connecting wires are used to electrically connect the pixel driving circuits on two adjacent pixel islands 301 , and the connecting wires include but not limited to at least one of signal wires such as scan lines and data lines.
- the length of the connection wiring between two adjacent pixel islands 301 in the first stretching region 101 is equal to the length of two adjacent pixel islands 301 in the second stretching region 102 The length of the connection trace between.
- the hollow area 313 is surrounded by the substrate island 311 and the substrate bridge 312, and the substrate of the hollow area 313 is excavated to form a substrate of the island bridge structure, thereby improving the stretchability
- the stretchability of the display panel 30 is shown.
- the substrate 31 is a flexible substrate, and the material of the substrate 31 includes but not limited to polyimide material.
- the area of any hollow area 313 in the first stretching area 101 is smaller than the area of any hollow area 313 in the second stretching area 102 .
- both the first support layer 10 and the second support layer 50 are integral membrane structures. Please refer to Fig. 1 and Fig.
- the stretch degree of the part of the first support layer 10 located in the first stretch zone 101 is smaller than the stretch of the part of the first support layer 10 located in the second stretch zone 102
- the degree of stretching, the stretching degree of the part of the second supporting layer 50 located in the first stretching zone 101 is smaller than the stretching degree of the part of the second supporting layer 50 located in the second stretching zone 102.
- the pixel driving circuit 32 may include multiple arrays of 7T1C (seven thin film transistors and one capacitor) pixel driving circuits, and the thin film transistors include but not limited to any one of low temperature polysilicon thin film transistors and oxide thin film transistors.
- the thin film transistor of the pixel driving circuit 32 includes an active layer 327 , a source, a drain, and a gate.
- the light emitting unit 33 includes but not limited to OLED (Organic Light-Emitting Diode, organic light-emitting diode) light-emitting unit, Mini LED light-emitting unit, and any of Mini LED light-emitting units. Please refer to FIG. 5.
- FIG. 5 is a schematic cross-sectional view of a stretchable display panel.
- the stretchable display panel 30 includes a buffer layer 321 disposed on the substrate island 311, an organic The source layer 327, the first insulating layer 322 disposed on the active layer 327, the first metal layer 328 disposed on the first insulating layer 322, the second metal layer 328 disposed on the first metal layer 328 The insulating layer 323 and the second metal layer 329 disposed on the second insulating layer 323 .
- the first metal layer 328 includes gates of a plurality of thin film transistors forming the pixel driving circuit 32
- the second metal layer 329 includes sources of a plurality of thin film transistors forming the pixel driving circuit 32, drain.
- the buffer layer 321 , the first insulating layer 322 , and the second insulating layer 323 are all inorganic layers, and the material of the inorganic layer can be silicon nitride or silicon oxide.
- the buffer layer 321, the first insulating layer 322, and the second insulating layer 323 on the connecting bridge 302 are excavated to form grooves, through which The organic filling layer 324 fills the groove.
- the connecting wiring 3291 is formed on the organic filling layer 324, the connecting wiring 3291 can be arranged on the same layer as the source and drain of the pixel driving circuit 32, and passes through the second metal layer 329 through a pattern formed.
- the second metal layer 329 is covered with a flat layer 325, the flat layer 325 is an organic layer, the flat layer 325 extends from the pixel island 301 to the connection bridge 302, covering the connection wiring 3291 .
- the connection wiring 3291 By disposing organic layers on the upper and lower sides of the connection wiring 3291, it is beneficial to relieve tensile stress.
- the substrate 31 in the hollow area 313 and the film layer thereon are all removed, and the hollow area 313 is filled with an adhesive layer when the first support layer 10 and the second support layer 50 are bonded subsequently.
- the light-emitting unit 33 is arranged on the flat layer 325, and the light-emitting unit 33 is packaged independently to prevent the tensile stress on the connecting bridge 302 from extending to the pixel island 301 along the packaging layer during stretching. Unit 33 makes an impact.
- the light-emitting unit 33 is an OLED light-emitting unit
- the OLED device since the OLED device is more sensitive to water vapor, an encapsulation layer is provided on the OLED light-emitting unit to block the intrusion of water and oxygen, and the encapsulation layer includes alternately stacked inorganic layers And the organic layer, the encapsulation layer is discontinuous design, only located on each of the pixel islands 301, covering the light-emitting unit 33 on the pixel island 301, the encapsulation layer does not extend to the connection bridge 302, so as to ensure that the light-emitting unit 33 Not affected by stretching.
- the LED chip is bound to the substrate island 311 by transfer printing. Independent packaging of the light emitting unit 33 on the stretched display panel 30 .
- the light-emitting unit 33 is preferably a Micro LED Unit or Mini LED unit, Micro/Mini LED is to make LED thin film, miniaturization, and array, and the size is reduced to tens of microns or even a few microns.
- Micro/Mini LED can achieve high PPI and high brightness; in addition, Micro /Mini LED does not require a special packaging process. Micro/Mini LED is made of inorganic materials, and its lifespan and stability are higher than OLED, and it is not prone to screen burn-in and aging.
- the light emitting unit 33 includes a first electrode 332 and a second electrode 333, the flat layer 325 is provided with a conductive connection layer 331, the first electrode 332 and the second electrode 333 are provided on the conductive connection layer 331 On the surface, the conductive connection layer 331 is electrically connected to the source or drain of the pixel driving circuit 32 through corresponding via holes.
- the flat layer 325 is provided with a passivation layer 326, the passivation layer 326 is provided with a via hole to expose the first electrode 332 and the second electrode 333, the LED chip 334 of the light emitting unit 33 is set on the first electrode 332 and the second electrode 333 .
- the curved surface display module includes a first cured adhesive layer 20 for bonding the stretchable display panel 30 and the first supporting layer 10, bonding the stretchable display panel 30 and the The second cured adhesive layer 40 of the second support layer 50 , at least one of the first cured adhesive layer 20 and the second cured adhesive layer 40 fills the hollow area 313 .
- the formation of the curved surface display module 100 needs to go through a hot bending process.
- the first cured adhesive layer 20 and the second cured adhesive layer 40 have a certain fluidity during the hot bending process, so that they can be stretched. It is cured after the bending process to provide a certain degree of rigidity and avoid distortion of the stretchable display panel. Therefore, the first cured adhesive layer 20 and the second cured adhesive layer 40 are adhesive materials with stretchability, specifically, but not limited to, OCA (Optically Clear Adhesive, optical adhesive), OCR (Optical Clear Resin, One of stretchable and curable transparent adhesives such as Liquid Optical Adhesive.
- the curved display module 100 in the embodiment of the present invention has a fixed curvature and can be applied in the center console of the vehicle field, the wearable field, the four-curved surface display field, and the spherical display field.
- the curved display module 100 is a four-curved display module, and the second stretching zone 102 is arranged around the first stretching zone 101.
- the stretching degree of the first stretching zone 101 is zero, and the stretching degree of the second stretching zone 102 is greater than zero.
- the substrate 31 of the stretchable display panel 30 generally needs to be prepared on a rigid substrate 60. After the pixel drive circuit 32 and the light emitting unit 33 are prepared, they need to be attached
- the protective film 70 is used to protect the stretchable display panel 30 and prevent the stretchable display panel 30 from being damaged during transfer and transportation.
- the rigid substrate 60 needs to be removed, and the rigid substrate 60 can be peeled off from the stretchable display panel 30 by laser lift off.
- the first cured adhesive layer 20 to attach the first supporting layer 10 to the first side of the stretchable display panel 30, specifically using The first cured adhesive layer 20 adheres the first supporting layer 10 to the substrate island 311 and the substrate bridge 312. At this time, the first cured adhesive layer 20 has not yet cured and has a flow and stretch properties.
- the first cured adhesive layer 20 can be OCA transparent adhesive material, OCA has low Young's modulus and good stretchability, and the first support layer 10 is preferably a thermoplastic A-PET sheet.
- the second cured adhesive layer 40 is filled with The hollow area 313 between the pixel island 301 and the connecting bridge 302 covers the surface of the stretchable display panel 30 on the second side.
- the first cured adhesive layer 20 is not yet cured. , with fluidity and tensile properties.
- the second cured adhesive layer 40 may be an OCA adhesive.
- the second cured adhesive layer 40 can also be OCR liquid optical adhesive, which is used for bonding uneven surfaces.
- the first support layer 10 is preferably a thermoplastic A-PET sheet.
- the stretchable display panel 30 needs to be thermoformed. , to form a curved display module 100 with a fixed curvature.
- the thermoforming process includes: firstly placing the display module formed by the stretchable display panel 30 bonded with the second supporting layer 50 and the first supporting layer 10 in a On the first surface 201 of the hot bending mold 200, clamps are used to clamp the two ends of the stretchable display panel 30 to fix the stretchable display panel 30, and the first surface 201 has different radii of curvature. surface; then the stretchable display panel 30 is heated; then pressure is applied to the stretchable display panel 30 so that the stretchable display panel 30 is bonded to the first surface 201; finally the The stretchable display panel 30 is cooled.
- the heated temperature of the second support layer 50 and the first support layer 10 reaches the softening temperature, and the second support layer 50 and the first support layer 10 are in a high elastic-plastic state, applying pressure at this time can make the display module along the
- the first surface 201 is bent and extended, and the display module is closely attached to the first surface 201 of the hot bending mold 200, and finally obtains the same shape as the first surface 201, and the connection of the stretchable display panel 30 corresponding to different regions
- the bridge stretches to varying degrees.
- the second support layer 50, the first support layer 10, the first cured adhesive layer 20, and the second cured adhesive layer 40 are cured, and the second support layer 50, the first The support layer 10, the first cured adhesive layer 20, and the second cured adhesive layer 40 maintain the shape during hot bending. Since the stretchable display panel 30 is sandwiched between the second support layer 50 and the first support layer 10, the stretchable display panel 30 also maintains the same curved shape, thereby realizing the preparation of a curved surface display module 100 with a fixed curvature. .
- a curved display module 100 with a four-sided curved display is taken as an example.
- a stretching zone 101 is in a different plane, and the second stretching zone 102 includes four stretching zones, which are respectively located at any stretching zone on the four sides of the first stretching zone and the first stretching zone.
- the angle formed is not zero degrees.
- the tensile strength of the first stretching zone 101 is zero, and the tensile strength of the second stretching zone 102 is greater than zero, that is, the first stretching zone 101 does not stretch, and the second stretching zone 102 does not stretch. 102 is stretched, and the second stretching zone 102 is bent and deformed into a curved surface under pressure.
- the tensile strength mentioned in this embodiment is relative to the fact that the stretchable display panel is not subjected to any tensile stress before thermoforming.
- the method of applying pressure to the curved display module 100 includes any one of vacuuming, feeding compressed air, applying mechanical pressure or hydraulic pressure. Specifically, it can be realized by vacuuming from the bottom of the heated mold, or by introducing compressed air from the top of the curved surface display module 100 , or by using other forms of mechanical pressure or hydraulic pressure.
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Abstract
Description
Claims (20)
- 一种曲面显示模组,包括显示区,其中,所述曲面显示模组包括:可拉伸显示面板,包括多个用于承载发光单元的像素岛、及连接相邻两所述像素岛的连接桥;以及第一支撑层,设置于所述可拉伸显示面板的第一侧;其中,所述显示区包括第一拉伸区和第二拉伸区,在所述曲面显示模组未受外力作用时,所述第一拉伸区内的所述连接桥的拉伸程度小于所述第二拉伸区内的所述连接桥的拉伸程度;在所述曲面显示模组未受外力作用时,所述第一拉伸区内的相邻两所述像素岛之间的距离小于所述第二拉伸区内的相邻两所述像素岛之间的距离;在所述曲面显示模组未受外力作用时,所述第一支撑层位于所述第一拉伸区的部分的拉伸程度小于所述第一支撑层位于所述第二拉伸区的部分的拉伸程度。
- 根据权利要求1所述的曲面显示模组,其中,所述第一拉伸区内的相邻两所述像素岛之间的所述连接桥的长度等于所述第二拉伸区内的相邻两所述像素岛之间的所述连接桥的长度。
- 根据权利要求1所述的曲面显示模组,其中,所述连接桥上设有多条连接走线,所述连接走线分别与相邻两所述像素岛中的像素驱动电路电性连接,在所述曲面显示模组未受外力作用时,所述第一拉伸区内的所述连接走线的拉伸程度小于所述第二拉伸区内的所述连接走线的拉伸程度。
- 根据权利要求3所述的曲面显示模组,其中,所述第一拉伸区内的相邻两所述像素岛之间的所述连接走线的长度等于所述第二拉伸区内的相邻两所述像素岛之间的所述连接走线的长度。
- 根据权利要求1所述的曲面显示模组,其中,所述曲面显示模组还包括:第二支撑层,设置于所述可拉伸显示面板的与所述第一侧相对的第二侧;在所述曲面显示模组未受外力作用时,所述第二支撑层位于所述第一拉伸区的部分的拉伸程度小于所述第二支撑层位于所述第二拉伸区的部分的拉伸程度。
- 根据权利要求5所述的曲面显示模组,其中,所述第一支撑层和所述第二支撑层均为热塑性基板。
- 根据权利要求5所述的曲面显示模组,其中,所述可拉伸显示面板包括设置在所述第一支撑层一侧的衬底,所述衬底包括位于所述像素岛的衬底岛、位于所述连接桥的衬底桥,以及位于所述衬底岛与所述衬底桥之间的镂空区,所述像素岛包括:所述衬底岛、以及依次堆叠在所述衬底岛上的像素驱动电路和所述发光单元;所述连接桥包括:所述衬底桥、以及设置在所述衬底桥上的多条连接走线,所述连接走线分别与相邻两所述衬底岛上的所述像素驱动电路电性连接。
- 根据权利要求7所述的曲面显示模组,其中,所述曲面显示模组还包括粘合所述可拉伸显示面板和所述第一支撑层的第一固化胶层,以及粘合所述可拉伸显示面板和所述第二支撑层的第二固化胶层,所述第一固化胶层和所述第二固化胶层中的至少一者还填充于所述镂空区。
- 一种曲面显示模组,包括显示区,其中,所述曲面显示模组包括:可拉伸显示面板,包括多个用于承载发光单元的像素岛、及连接相邻两所述像素岛的连接桥;以及第一支撑层,设置于所述可拉伸显示面板的第一侧;其中,所述显示区包括第一拉伸区和第二拉伸区,在所述曲面显示模组未受外力作用时,所述第一拉伸区内的所述连接桥的拉伸程度小于所述第二拉伸区内的所述连接桥的拉伸程度。
- 根据权利要求9所述的曲面显示模组,其中,在所述曲面显示模组未受外力作用时,所述第一拉伸区内的相邻两所述像素岛之间的距离小于所述第二拉伸区内的相邻两所述像素岛之间的距离。
- 根据权利要求10所述的曲面显示模组,其中,所述第一拉伸区内的相邻两所述像素岛之间的所述连接桥的长度等于所述第二拉伸区内的相邻两所述像素岛之间的所述连接桥的长度。
- 根据权利要求10所述的曲面显示模组,其中,所述连接桥上设有多条连接走线,所述连接走线分别与相邻两所述像素岛中的像素驱动电路电性连接,在所述曲面显示模组未受外力作用时,所述第一拉伸区内的所述连接走线的拉伸程度小于所述第二拉伸区内的所述连接走线的拉伸程度。
- 根据权利要求12所述的曲面显示模组,其中,所述第一拉伸区内的相邻两所述像素岛之间的所述连接走线的长度等于所述第二拉伸区内的相邻两所述像素岛之间的所述连接走线的长度。
- 根据权利要求9任一项所述的曲面显示模组,其中,在所述曲面显示模组未受外力作用时,所述第一支撑层位于所述第一拉伸区的部分的拉伸程度小于所述第一支撑层位于所述第二拉伸区的部分的拉伸程度。
- 根据权利要求14所述的曲面显示模组,其中,所述曲面显示模组还包括:第二支撑层,设置于所述可拉伸显示面板的与所述第一侧相对的第二侧;在所述曲面显示模组未受外力作用时,所述第二支撑层位于所述第一拉伸区的部分的拉伸程度小于所述第二支撑层位于所述第二拉伸区的部分的拉伸程度。
- 根据权利要求15所述的曲面显示模组,其中,所述第一支撑层和所述第二支撑层均为热塑性基板。
- 根据权利要求15所述的曲面显示模组,其中,所述可拉伸显示面板包括设置在所述第一支撑层一侧的衬底,所述衬底包括位于所述像素岛的衬底岛、位于所述连接桥的衬底桥,以及位于所述衬底岛与所述衬底桥之间的镂空区,所述像素岛包括:所述衬底岛、以及依次堆叠在所述衬底岛上的像素驱动电路和所述发光单元;所述连接桥包括:所述衬底桥、以及设置在所述衬底桥上的多条连接走线,所述连接走线分别与相邻两所述衬底岛上的所述像素驱动电路电性连接。
- 根据权利要求17所述的曲面显示模组,其中,所述曲面显示模组还包括粘合所述可拉伸显示面板和所述第一支撑层的第一固化胶层,以及粘合所述可拉伸显示面板和所述第二支撑层的第二固化胶层,所述第一固化胶层和所述第二固化胶层中的至少一者还填充于所述镂空区。
- 根据权利要求17所述的曲面显示模组,其中,所述连接走线与所述衬底桥之间设置有有机填充层,所述连接走线背离所述衬底桥一侧覆盖有有机层。
- 根据权利要求1所述的曲面显示模组,其中,所述第二拉伸区围绕所述第一拉伸区,在所述曲面显示模组未受外力作用时,所述第一拉伸区的拉伸程度为零,所述第二拉伸区的拉伸程度大于零。
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JP2022502956A JP2023541494A (ja) | 2021-08-12 | 2021-09-02 | 曲面表示モジュール |
EP21859352.3A EP4386724A1 (en) | 2021-08-12 | 2021-09-02 | Curved surface display module |
KR1020217034618A KR102697498B1 (ko) | 2021-08-12 | 2021-09-02 | 곡면 디스플레이 모듈 |
US17/598,290 US12021090B2 (en) | 2021-08-12 | 2021-09-02 | Curved display module |
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CN202110924468.XA CN113689788A (zh) | 2021-08-12 | 2021-08-12 | 曲面显示模组 |
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