WO2020015344A1 - 显示面板及显示装置 - Google Patents

显示面板及显示装置 Download PDF

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Publication number
WO2020015344A1
WO2020015344A1 PCT/CN2019/071829 CN2019071829W WO2020015344A1 WO 2020015344 A1 WO2020015344 A1 WO 2020015344A1 CN 2019071829 W CN2019071829 W CN 2019071829W WO 2020015344 A1 WO2020015344 A1 WO 2020015344A1
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WO
WIPO (PCT)
Prior art keywords
region
buffer layer
sub
bending
display panel
Prior art date
Application number
PCT/CN2019/071829
Other languages
English (en)
French (fr)
Inventor
陈玲艳
Original Assignee
昆山国显光电有限公司
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Filing date
Publication date
Application filed by 昆山国显光电有限公司 filed Critical 昆山国显光电有限公司
Priority to US16/740,493 priority Critical patent/US11147170B2/en
Publication of WO2020015344A1 publication Critical patent/WO2020015344A1/zh

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0277—Bendability or stretchability details
    • H05K1/028—Bending or folding regions of flexible printed circuits
    • H05K1/0281—Reinforcement details thereof
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/0017—Casings, cabinets or drawers for electric apparatus with operator interface units
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • 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
    • 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
    • H01L25/18—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different subgroups of the same main group of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
    • H04M1/0268—Details of the structure or mounting of specific components for a display module assembly including a flexible display panel
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0277—Bendability or stretchability details
    • H05K1/028—Bending or folding regions of flexible printed circuits
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/842—Containers
    • H10K50/8426—Peripheral sealing arrangements, e.g. adhesives, sealants
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/147—Structural association of two or more printed circuits at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H05K1/189—Printed circuits structurally associated with non-printed electric components characterised by the use of a flexible or folded printed circuit
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10128—Display
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/311—Flexible OLED
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/351—Thickness
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/361—Temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

Definitions

  • the present application relates to the field of display, for example, to a display panel and a display device.
  • the full-screen display device claimed by the industry is actually only a display device with an ultra-high screen ratio.
  • the method of bending the second region is used to make the flexible screen achieve a full-screen display effect, that is, the second region of the flexible screen is bent to the back of the display side of the flexible screen to reduce the width of the screen frame, thereby increasing the width of the screen. Screen ratio.
  • the bending start position of the flexible screen body is prone to stress concentration.
  • creases may be generated, thereby damaging the screen body or cable at that position, and even causing The screen or cable at this location has failed.
  • the present application provides a display panel and a display device.
  • a display panel includes:
  • the flexible screen body includes a first region and a second region connected to the first region; the second region includes a bending transition region, a bending region, and an extension region connected in sequence, and the bending transition region is connected to an office.
  • the bend region and the first region, and the bend transition region and the first region are coplanar; the bend region and the extension region are not coplanar with the first region; the The first area is a display area of the flexible screen body, the bending transition area is one of a display area and a non-display area of the flexible screen body, and the bending area and the extension area are all The non-display area of the flexible screen body;
  • a buffer layer is provided on the surface of the bending transition region and the stress concentration side of the bending region, and the hardness of different parts of the buffer layer is different.
  • the buffer layer includes a first sub-buffer layer and a second sub-buffer layer.
  • the first sub-buffer layer covers the bending transition region and partially covers the bending region.
  • a second sub-buffer layer partially covers the bending region, and the hardness of the first sub-buffer layer is greater than the hardness of the second sub-buffer layer.
  • At least one of the first sub-buffer layer and the second sub-buffer layer is an organic glue layer.
  • one of the first sub-buffer layer and the second sub-buffer layer is an acrylic glue layer, a silica gel layer, a PU glue layer, a UV glue layer, or an OCA layer.
  • both the thickness of the first sub-buffer layer and the thickness of the second sub-buffer layer decrease along the direction from the first region to the second region.
  • the thickness of the first sub-buffer layer is greater than the thickness of the second sub-buffer layer.
  • the thickness of the first sub-buffer layer is 0.1 mm, and the thickness of the second sub-buffer layer is 0.075 mm.
  • the buffer layer is mixed with bend-resistant flexible particles, and the density of the bend-resistant flexible particles in the first sub-buffer layer is greater than the bend-resistant flexibility in the second sub-buffer layer. Particle density.
  • the bend-resistant flexible particles include nylon particles or polymethyl methacrylate particles.
  • the width of the bent transition region is greater than or equal to 0.1 mm and less than or equal to 0.5 mm.
  • it further includes a support layer for supporting the flexible screen, the first region is disposed on one side of the support layer, and the extension region is disposed on the support layer away from the support layer.
  • the support layer includes a first support film disposed on a surface of the first region near the extension region, and a first support film disposed on a surface of the extension region near the first region. Two support films, and a block provided between the first support film and the second support film.
  • an end of the first sub-buffer layer far from the second sub-buffer layer is adjacent to and in contact with the first support film, and the second support film is close to the bending area
  • the end surface of the surface is coplanar with the plane where the bending region and the extension region are connected.
  • a material of the first support film and the second support film includes polyethylene terephthalate, and a material of the cushion block includes silica gel.
  • the thickness of the first support film and the second support film is greater than or equal to 0 nm and less than or equal to 0.2 mm.
  • the bending area is provided with a metal trace, and the metal trace is provided with a hole.
  • the bending area is arc-shaped.
  • the bending angle of the bending area is 180 degrees.
  • a driving unit and a flexible circuit board disposed on the extension region are further included.
  • the present application further provides a display device including the display panel provided by the present application.
  • FIG. 1 is a schematic cross-sectional view of a display panel according to an embodiment of the present application.
  • FIG. 2 is a schematic cross-sectional view of a display panel according to another embodiment of the present application.
  • an embodiment of the present application provides a display panel 100 including a flexible screen body and a buffer layer 130.
  • the flexible screen body includes a first region 111 and a second region 113 connected to the first region 111.
  • the second region 113 includes a bending transition region 1131, a bending region 1133, and an extension region 1135, which are sequentially connected.
  • the extension region 1135 is located on a side of the bending region 1133 away from the first region 111.
  • the bending transition region 1131 connects the bending region 1133 and the first region 111, and the bending transition region 1131 is coplanar with the first region 111.
  • the bending region 1133 connects the bending transition region 1131 and the extension region 1135, and the bending region 1133 and the extension region 1135 are not coplanar with the first region 111. That is, the first region 111, the bending transition region 1131, the bending region 1133, and the extension region 1135 are connected in this order.
  • the flexible screen body includes a flexible substrate, and the flexible substrate can be divided into a display area and a non-display area adjacent to the display area.
  • the display layer may be integrated on a display area of the flexible substrate.
  • the display layer may include a plurality of display components for displaying images, so that the display area of the flexible substrate forms a display area of the flexible screen.
  • the display layer may include different display components such as a thin film transistor, a gate line, a data line, a capacitor, an anode, a cathode, an organic light emitting layer, and a color filter film.
  • a polarizer 120 may also be disposed on the display layer to increase the light transmittance of the display layer and reduce external reflected light.
  • the polarizer 120 is further provided with a flexible cover plate 140 for protecting the flexible screen body.
  • the second region 113 of the flexible substrate is provided with an integrated circuit for implementing functions such as signal transmission and signal driving.
  • the structures of the display area and the non-display area of the flexible screen body provided in the present application may adopt structures commonly used in the art.
  • the first area 111 is a display area of the flexible screen.
  • the bent region 1133 and the extended region 1135 of the second region 113 are non-display regions of the flexible screen.
  • the bent transition area 1131 of the second area 113 may be a display area of the flexible screen, or a non-display area of the flexible screen.
  • a metal trace (not shown in the figure) is disposed in the bending area 1133 of the flexible screen body.
  • a circular or other shaped hole is provided on the metal wiring to relieve the stress generated when the bending area 1133 of the flexible screen body is bent.
  • the cross-sectional shapes of the metal traces in the non-display area of the flexible screen body along the trace direction are the same.
  • the direction of the metal traces in the bending area 1133 of the flexible screen body may be a straight line or a curved line.
  • the bending region 1133 is arc-shaped.
  • the bending angle of the bending region 1133 is 180 degrees, so that the extension region 1135 is parallel to the first region 111, so that the extension region 1135 of the flexible screen body can be better supported and fixed, and the flexible screen body is reduced.
  • the space occupied is also easier to achieve in the process.
  • the buffer layer 130 is disposed on the surface of the stress concentration side of the bending transition region 1131 and the bending region 1133 of the flexible screen body, and the hardness of different parts of the buffer layer 130 is different.
  • the bending start position of the flexible screen body is a position where the bending area 1133 and the bending transition area 1131 are connected.
  • the hardness of different parts of the buffer layer 130 is different.
  • the hardness of the buffer layer 130 in the area near the bending start position can be set to be large to support the area near the bending start position of the flexible screen body and prevent the flexible screen.
  • the stress concentration caused by excessive bending in the area near the bending start position of the body can protect the area near the bending start position of the flexible screen body. Accordingly, the hardness of the buffer layer 130 in the area far from the bending start position of the flexible screen body can be set to be small, and the stress generated in the corresponding area of the flexible screen body can be released.
  • the buffer layer 130 includes a first sub-buffer layer 131 and a second sub-buffer layer 133.
  • the first sub-buffer layer 131 completely covers the bend transition region 1131 and partially covers the bend region 1133, and the second sub-buffer layer 133 partially covers the bend region 1133.
  • the hardness of the first sub-buffer layer 131 is greater than the hardness of the second sub-buffer layer 133.
  • the second sub-buffer layer 133 has a small hardness, which can reduce the bending difficulty of the flexible screen.
  • the buffer layer 130 partially covers the bending region 1133.
  • the area of the buffer layer 130 covering the bending region 1133 may be determined according to the stress generated by the bending region 1133 of the flexible screen body.
  • the first sub-buffer layer 131 is adjacent to the second sub-buffer layer 133. Further, the first sub-buffer layer 131 is in contact with the second sub-buffer layer 133.
  • the second sub-buffer layer 133 may be designed to cover the specific position of the bending region 1133 according to the stress generated by the bending region 1133 of the flexible screen body.
  • other buffer layers such as a third sub-buffer layer, may be added to relieve stress in different positions of the bending region 1133.
  • At least one of the first sub-buffer layer 131 and the second sub-buffer layer 133 is an organic glue layer.
  • the organic glue layer has a certain degree of flexibility and hardness. The softness of the organic glue layer can release the stress in the area near the bending start position of the flexible screen, and the hardness of the organic glue layer can support the vicinity of the bending start position of the flexible screen. This prevents the area near the bending start position of the flexible screen body from being excessively bent and causing stress concentration.
  • At least one of the first sub-buffer layer 131 and the second sub-buffer layer 133 may be an acrylic adhesive layer, a silicone layer, a PU adhesive layer, a UV adhesive layer, an OCA (Optically Clear Adhesive) layer, or the like.
  • At least one of the first sub-buffer layer 131 and the second sub-buffer layer 133 may also be another buffer layer having a certain flexibility and a certain hardness.
  • both the thickness of the first sub-buffer layer 131 and the thickness of the second sub-buffer layer 133 decrease along the direction from the first region 111 to the second region 113. That is, the thicknesses of portions of the first sub-buffer layer 131 and the second sub-buffer layer 133 near the bending start position are larger than those of the portions far from the bending start position. In other embodiments, the thicknesses of the first sub-buffer layer 131 and the second sub-buffer layer 133 may be the same everywhere.
  • the width B of the bending transition region 1131 is 0.1 mm to 0.5 mm, that is, the width B of the bending transition region 1131 is 0.1 mm or more and 0.5 mm or less. In this way, the stress of the bending start position can be relieved by the first sub-buffer layer 131, and the space of the display area of the display panel is not occupied too much, that is, the screen ratio of the display panel is not affected.
  • the display panel 100 further includes a driving unit 150 and a flexible circuit board 170 disposed on the extension region 1135, and a gap exists between the driving unit 150 and the flexible circuit board 170.
  • the flexible screen body adopts COP (Chip On Chip) packaging technology.
  • the driving unit 150 and the flexible circuit board 170 may also be disposed in other areas of the flexible screen body.
  • FIG. 1 it further includes a support layer 190 for supporting the flexible screen body.
  • the first area 111 of the flexible screen body is disposed on one side of the support layer 190, and the extension area 1135 of the flexible screen body is disposed on The side of the support layer 190 remote from the first region 111; an end of the first sub-buffer layer 131 remote from the second sub-buffer layer 133 is adjacent to and in contact with the support layer 190.
  • the support layer 190 may be formed of a material having both hardness and elasticity. In this way, the support layer 190 can be used to support the flexible screen body, and can also be used to reduce vibration.
  • the support layer 190 includes a first support film 191 provided on a surface of the first region 111 of the flexible screen near the extension region 1135, and a second support film provided on a surface of the extension region 1135 near the first region 111. 193, and a block 195 provided between the first support film 191 and the second support film 193.
  • an end of the first sub-buffer layer 131 far from the second sub-buffer layer 133 is adjacent to and in contact with the first support film 191. That is, the end surface of the first supporting film 191 close to the bending region 1133 is coplanar with the first connection region 111 and the bending transition region 1131 of the flexible screen.
  • the end face of the second support film 193 near the bending area 1133 and the end of the flexible screen body are bent (ie, the bending area 1133 of the flexible screen body and The junction of the extension region 1135) is coplanar.
  • the first support film 191 and the second support film 193 are both PET (Polyethylene Terephthalate) films.
  • the thickness of the first support film 191 and the second support film 193 is 0 to 0.2 mm, that is, the thickness of the first support film 191 and the second support film 193 is 0 nm or more and 0.2 mm or less.
  • the elevated block 195 may be formed of a material such as silicone.
  • the cushion block 195 may have a certain elasticity and hardness. Since the cushion block 195 has a certain hardness, the flexible screen body can be prevented from being deformed by being squeezed. Because the cushion block 195 has a certain elasticity, the flexible screen body can be prevented from being damaged due to the local stress.
  • the thickness of the first support film 191 and the second support film 193 may be increased, or other support structures may be added to ensure the distance between the first region 111 and the extension region 1135.
  • another embodiment of the present application provides a display panel 200 that is different from the display panel 100.
  • the thickness of the first sub-buffer layer 231 is the same everywhere, and the second sub-buffer layer is the same.
  • the thickness of 233 is also the same everywhere.
  • the first sub-buffer layer 231 and the second sub-buffer layer 233 are formed of the same material, and the thickness of the first sub-buffer layer 231 is greater than the thickness of the second sub-buffer layer 233 so that the first The hardness of the sub buffer layer 231 is greater than that of the second sub buffer layer 233.
  • the first sub-buffer layer 231 and the second sub-buffer layer 233 are both OCA layers.
  • the thickness of the first sub-buffer layer 231 is 0.1 mm, and the thickness of the second sub-buffer layer 233 is 0.075 mm.
  • the first sub-buffer layer and the second sub-buffer layer may also be formed of different materials.
  • the hardness of the first sub-buffer layer may be made greater than that of the second sub-buffer layer by other means.
  • bend-resistant flexible particles are mixed in the first buffer layer and the second buffer layer, and the density of the bend-resistant flexible particles in the first sub-buffer layer is greater than the density of the bend-resistant flexible particles in the second sub-buffer layer.
  • the bend-resistant flexible particles may be mixed only in the first sub-buffer layer.
  • the bend-resistant flexible particles may be nylon particles, PMMA (Polymethyl Methacrylate, PMMA) particles, or the like.
  • the first sub-buffer layer 231 and the second sub-buffer layer 233 completely cover the bending region 1133.
  • the buffer layer 230 may cover only a part of the bending region 1133.
  • the buffer layer 230 only covers a region where the bending region 1133 is liable to generate large stress.
  • the present application further provides a display device including the display panel provided by the present application.
  • the display device provided in the present application also includes other components such as a housing, which is not limited herein.
  • the bending start position of the flexible screen body is a position where the bending region and the bending transition region are connected.
  • the hardness of different parts of the buffer layer is different.
  • the hardness of the buffer layer near the bending start position can be set to be larger to support the area near the bending start position of the flexible screen and prevent the bending of the flexible screen.
  • the area near the starting position causes stress concentration due to excessive bending, thereby protecting the area near the bending start position of the flexible screen body.
  • the above display device includes the display panel provided in the present application, and the bending start position of the flexible screen body is a position where the bending area and the bending transition area are connected.
  • Different parts of the buffer layer have different hardnesses.
  • the hardness of the buffer layer near the bending start position can be set to be large to support the area near the bending start position of the flexible screen and prevent the bending of the flexible screen.
  • the area near the folding start position causes stress concentration due to excessive bending, thereby achieving protection of the folding screen starting position.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

一种显示面板(100,200)及显示装置。显示面板(100,200)包括柔性屏体，柔性屏体包括第一区域(111)和与第一区域(111)连接的第二区域(113)。第二区域(113)包括依次连接的弯折过渡区(1131)、弯折区(1133)和延伸区(1135)。弯折过渡区(1131)连接弯折区(1133)与第一区域(111)。弯折过渡区(1131)与第一区域(111)共面，弯折区(1133)与延伸区(1135)均与第一区域(111)不共面。第一区域(111)为柔性屏体的显示区，弯折过渡区(1131)为柔性屏体的显示区及非显示区二者其中之一，弯折区(1133)和延伸区(1135)为柔性屏体的非显示区。显示面板(100,200)还包括缓冲层(130,230)，设置于弯折过渡区(1131)和弯折区(1133)的应力集中侧的表面上，缓冲层(130,230)的不同部分的硬度不同。还提供一种包括显示面板(100,200)的显示装置。

Description

显示面板及显示装置
本申请要求于2018年7月18日提交中国专利局、申请号为201810792967.6、发明名称为“显示面板及显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示领域，例如涉及一种显示面板及显示装置。
背景技术
随着信息技术的发展，手机等显示装置已经成为人们生活中不可或缺的工具，而全面屏显示装置也成为越来越多用户的追求。目前，业界宣称的全面屏显示装置实际上只是具有超高屏占比的显示装置。通常采用将第二区域弯折的办法使得柔性屏体实现全面屏的显示效果，即：将柔性屏体的第二区域弯折到柔性屏体显示侧的背面从而缩小屏体边框宽度，进而提高屏占比。
然而，柔性屏体第二区域被弯折时，柔性屏体的弯折起始位置容易产生应力集中的现象，严重的，可能产生折痕，进而损伤该位置处的屏体或电缆，甚至使得该位置处的屏体或电缆失效。
发明内容
本申请提供一种显示面板及显示装置。
一种显示面板，包括：
柔性屏体，包括第一区域和与所述第一区域连接的第二区域；所述第二 区域包括依次连接的弯折过渡区、弯折区和延伸区，所述弯折过渡区连接所述弯折区与所述第一区域，且所述弯折过渡区与所述第一区域共面；所述弯折区与所述延伸区均与所述第一区域不共面；所述第一区域为所述柔性屏体的显示区，所述弯折过渡区为所述柔性屏体的显示区及非显示区二者其中之一，所述弯折区和所述延伸区为所述柔性屏体的非显示区；
以及缓冲层，设置于所述弯折过渡区和弯折区的应力集中侧的表面上，所述缓冲层的不同部分的硬度不同。
在其中一个实施例中，所述缓冲层包括第一子缓冲层和第二子缓冲层，所述第一子缓冲层覆盖所述弯折过渡区并部分覆盖所述弯折区，所述第二子缓冲层部分覆盖所述弯折区，所述第一子缓冲层的硬度大于所述第二子缓冲层的硬度。
在其中一个实施例中，所述第一子缓冲层和第二子缓冲层二者其中至少一者为有机胶层。
在其中一个实施例中，所述第一子缓冲层和第二子缓冲层二者其中之一为亚克力胶层、硅胶层、PU胶层、UV胶层或OCA层。
在其中一个实施例中，所述第一子缓冲层的厚度与第二子缓冲层的厚度均沿着从所述第一区域到所述第二区域的方向递减。
在其中一个实施例中，所述第一子缓冲层的厚度大于所述第二子缓冲层的厚度。
在其中一个实施例中，所述第一子缓冲层的厚度为0.1mm，所述第二子缓冲层的厚度为0.075mm。
在其中一个实施例中，所述缓冲层内混合有耐弯折柔性粒子，所述第一 子缓冲层中的耐弯折柔性粒子的密度大于所述第二子缓冲层中的耐弯折柔性粒子的密度。
在其中一个实施例中，所述耐弯折柔性粒子包括尼龙粒子或聚甲基丙烯酸甲酯粒子。
在其中一个实施例中，所述弯折过渡区的宽度大于等于0.1mm，小于等于0.5mm。
在其中一个实施例中，还包括用以支撑所述柔性屏体的支撑层，所述第一区域设置于所述支撑层的一侧，所述延伸区设置于所述支撑层的远离所述第一区域的一侧；所述第一子缓冲层远离所述第二子缓冲层的端部与所述支撑层相邻并接触。
在其中一个实施例中，所述支撑层包括设置于所述第一区域靠近所述延伸区的表面上的第一支撑膜、设置于所述延伸区靠近所述第一区域的表面上的第二支撑膜、以及设置于所述第一支撑膜和所述第二支撑膜之间的垫高块。
在其中一个实施例中，所述第一子缓冲层远离所述第二子缓冲层的端部与所述第一支撑膜相邻并接触，所述第二支撑膜的靠近所述弯折区的端面与所述弯折区和所述延伸区的连接处所在面共面。
在其中一个实施例中，所述第一支撑膜和所述第二支撑膜的材料包括聚对苯二甲酸乙二醇酯，所述垫高块的材料包括硅胶。
在其中一个实施例中，所述第一支撑膜和所述第二支撑膜的厚度大于等于0nm，小于等于0.2mm。
在其中一个实施例中，所述弯折区设置有金属走线，所述金属走线上设有孔。
在其中一个实施例中，所述弯折区呈弧形。
在其中一个实施例中，所述弯折区的弯折角度为180度。在其中一个实施例中，还包括设置于所述延伸区上的驱动单元和柔性电路板。
本申请还提供一种显示装置，包括本申请提供的显示面板。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其它特征、目的和优点将根据说明书、附图以及权利要求书的描述变得明显。
附图说明
为了更好地描述和说明本申请的实施例或示例，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的申请、目前描述的实施例和示例以及目前理解的这些申请的最佳模式中的任何一者的范围的限制。
图1为本申请一实施例提供的显示面板的截面示意图。
图2为本申请另一实施例提供的显示面板的截面示意图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚，以下结合附图及实施例，对本申请进行详细说明。此处所描述的具体实施例仅用以解释本申请，不应当被认为是对本申请的限制。
如图1所示，本申请一实施例提供一种显示面板100，其包括柔性屏体以及缓冲层130。
具体地，柔性屏体包括第一区域111和与第一区域111连接的第二区域113。第二区域113包括依次连接的弯折过渡区1131、弯折区1133和延伸区1135。延伸区1135位于弯折区1133的远离第一区域111的一侧。弯折过渡区1131连接弯折区1133与第一区域111，且弯折过渡区1131与第一区域111共面。弯折区1133连接弯折过渡区1131和延伸区1135，弯折区1133和延伸区1135均与第一区域111不共面。即，第一区域111、弯折过渡区1131、弯折区1133和延伸区1135依次连接。
一般地，柔性屏体包括柔性基板，柔性基板上可分为显示区域以及与显示区域相邻的非显示区域。
具体地，显示层可以集成在柔性基板的显示区域上。显示层可以包括多个用于显示图像的显示部件，使柔性基板的显示区域形成柔性屏体的显示区。显示层上可以包括诸如薄膜晶体管、栅线、数据线、电容、阳极、阴极、有机发光层、彩色滤光膜等不同的显示部件。显示层之上还可以设置偏光片120，以增加显示层的透光率，以及减少外界反射光。偏光片120上还设置有用于保护柔性屏体的柔性盖板140。
柔性基板的第二区域113上设置有用于实现信号传输、信号驱动等功能的集成电路。
本申请提供的柔性屏体的显示区、非显示区的结构可采用本领域常用的结构。
需要说明的是，第一区域111为柔性屏体的显示区。第二区域113的弯折区1133和延伸区1135为柔性屏体的非显示区。第二区域113的弯折过渡区1131可以是柔性屏体的显示区，也可以是柔性屏体的非显示区。
在对柔性屏体进行弯折时，只对柔性屏体的弯折区1133进行弯折，而设置在显示层之上的偏光片、触摸敏感层、柔性盖板等不需要进行弯折。
一般地，柔性屏体的弯折区1133内设置有金属走线(图中未示出)。金属走线上设有圆形或其它形状的孔，以缓解柔性屏体的弯折区1133弯折时产生的应力。优选地，柔性屏体的非显示区内的金属走线沿走线方向的横截面形状相同。另外，柔性屏体的弯折区1133内的金属走线的走向可以是直线或曲线。
一般地，弯折区1133呈弧形。优选地，弯折区1133弯折的角度为180度，使得延伸区1135与第一区域111平行，从而使得柔性屏体的延伸区1135能够被更好地支撑与固定，减小了柔性屏体占用的空间，在工艺上也更容易实现。
缓冲层130设置于柔性屏体的弯折过渡区1131和弯折区1133的应力集中侧的表面上，且缓冲层130的不同部分的硬度不同。
柔性屏体的弯折起始位置为弯折区1133和弯折过渡区1131连接的位置。缓冲层130的不同部分的硬度不同，例如，可以将弯折起始位置附近区域的缓冲层130的硬度设置为较大，以支撑柔性屏体的弯折起始位置附近的区域，防止柔性屏体的弯折起始位置附近区域因过度弯曲而导致的应力集中，实现对柔性屏体的弯折起始位置附近区域的保护。相应地，可以将远离柔性屏体的弯折起始位置的区域的缓冲层130的硬度设置为较小，释放柔性屏体的相应区域产生的应力。
具体地，本实施例中，缓冲层130包括第一子缓冲层131和第二子缓冲层133。第一子缓冲层131完全覆盖弯折过渡区1131并部分覆盖弯折区1133， 第二子缓冲层133部分覆盖弯折区1133。且第一子缓冲层131的硬度大于第二子缓冲层133的硬度。第二子缓冲层133硬度较小，可以减小柔性屏体的弯折难度。
需要说明的是，本实施例中，缓冲层130部分覆盖弯折区1133。在其他实施例中，可以根据柔性屏体的弯折区1133产生应力的大小确定缓冲层130覆盖弯折区1133的面积。
本实施例中，第一子缓冲层131与第二子缓冲层133相邻。进一步地，第一子缓冲层131与第二子缓冲层133接触。在其他的实施例中，可以根据柔性屏体的弯折区1133产生的应力大小，设计第二子缓冲层133覆盖弯折区1133的具体位置。另外，可以增加其他缓冲层，如第三子缓冲层，用于缓解弯折区1133的不同位置的应力。
本实施例中，第一子缓冲层131和第二子缓冲层133二者中至少一者为有机胶层。有机胶层具有一定的柔软性和硬度，有机胶层的柔软性可以释放柔性屏体的弯折起始位置附近区域的应力，有机胶层的硬度可以支撑柔性屏体的弯折起始位置附近的区域，从而避免柔性屏体的弯折起始位置附近区域被过度弯折而导致应力集中。具体地，第一子缓冲层131和第二子缓冲层133二者中至少一者可以为亚克力胶层、硅胶层、PU胶层、UV胶层或OCA(Optically Clear Adhesive)层等。
在其他实施例中，第一子缓冲层131和第二子缓冲层133二者中至少一者还可以是其它具有一定柔软性和一定硬度的缓冲层。
本实施例中，第一子缓冲层131的厚度与第二子缓冲层133的厚度均沿着从第一区域111到第二区域113的方向递减。即，第一子缓冲层131与第 二子缓冲层133的靠近弯折起始位置的部分的厚度大于其远离弯折起始位置的部分的厚度。在其他实施例中，第一子缓冲层131和第二子缓冲层133在各处的厚度也可以相同。
本实施例中，弯折过渡区1131的宽度B为0.1mm至0.5mm，即弯折过渡区1131的宽度B大于等于0.1mm，小于等于0.5mm。这样既能通过第一子缓冲层131缓解弯折起始位置的应力，还不会过多的占用显示面板的显示区域的空间，即不影响显示面板的屏占比。
本实施例中，如图1所示，显示面板100还包括设置于延伸区1135上的驱动单元150和柔性电路板170，驱动单元150和柔性电路板170之间存在间隙。本实施例中，柔性屏体采用COP(Chip On Pi，薄膜上芯片)封装技术。在其他实施例中，驱动单元150和柔性电路板170也可以设置在柔性屏体的其他区域。
本实施例中，如图1所示，还包括用以支撑柔性屏体的支撑层190，柔性屏体的第一区域111设置于支撑层190的一侧，柔性屏体的延伸区1135设置于支撑层190的远离第一区域111的一侧；第一子缓冲层131远离第二子缓冲层133的端部与支撑层190相邻并接触。
进一步地，支撑层190可由兼具硬度和弹性的材料形成。这样，支撑层190可以用于支撑柔性屏体，也可以用于减振。
具体地，支撑层190包括设于柔性屏体的第一区域111靠近延伸区1135的表面上的第一支撑膜191、设于延伸区1135的靠近第一区域111的表面上的第二支撑膜193、以及设于第一支撑膜191和第二支撑膜193之间的垫高块195。
优选地，本实施例中，第一子缓冲层131远离第二子缓冲层133的端部与第一支撑膜191相邻并接触。即第一支撑膜191靠近弯折区1133的端面与柔性屏体的第一区域111和弯折过渡区1131连接处所在面共面。同样的，为了更好的支撑柔性屏体的延伸区1135，第二支撑膜193的靠近弯折区1133的端面与柔性屏体的末端弯折位置(即，柔性屏体的弯折区1133与延伸区1135的连接处)所在面共面。
优选地，本实施例中，第一支撑膜191和第二支撑膜193均为PET(Polyethylene Terephthalate，聚对苯二甲酸乙二醇酯)膜。优选地，第一支撑膜191和第二支撑膜193的厚度为0至0.2mm，即第一支撑膜191和第二支撑膜193的厚度大于等于0nm，小于等于0.2mm。
垫高块195可由硅胶等材料形成。垫高块195可以具有一定弹性和硬度。由于垫高块195具有一定硬度，可以避免所述柔性屏体被挤压变形。由于垫高块195具有一定弹性，可以避免所述柔性屏体由于受到局部应力的作用而损坏。
在其他实施例中，还可以通过增加第一支撑膜191和第二支撑膜193厚度，或增加其他支撑结构，以确保第一区域111和延伸区1135之间的距离。
如图2所示，本申请另一实施例提供一种显示面板200，与显示面板100不同，在该实施例中，第一子缓冲层231在各处的厚度相同，且第二子缓冲层233在各处的厚度也相同。
具体地，本实施例中，第一子缓冲层231与第二子缓冲层233由相同的材料形成，且第一子缓冲层231的厚度大于第二子缓冲层233的厚度，以使得第一子缓冲层231的硬度大于第二子缓冲层233的硬度。
进一步地，本实施例中，第一子缓冲层231与第二子缓冲层233均为OCA层，第一子缓冲层231的厚度为0.1mm，第二子缓冲层233的厚度为0.075mm。
在其他实施例中，在保证第一子缓冲层的硬度大于第二子缓冲层的硬度的情况下，第一子缓冲层与第二子缓冲层也可以由不同的材料形成。
在其他实施例中，还可以通过其它方式使得第一子缓冲层的硬度大于第二子缓冲层的硬度。例如，在第一缓冲层和第二缓冲层中混合耐弯折柔性粒子，且第一子缓冲层中的耐弯折柔性粒子的密度大于第二子缓冲层中的耐弯折柔性粒子的密度。另外，可以仅在第一子缓冲层中混合耐弯折柔性粒子。
具体地，耐弯折柔性粒子可以是尼龙粒子、PMMA(Polymethyl Methacrylate，聚甲基丙烯酸甲酯)粒子等。
本实施例中，第一子缓冲层231与第二子缓冲层233完全覆盖弯折区1133。在其他实施例中，缓冲层230也可以仅覆盖部分弯折区1133，比如，缓冲层230仅覆盖弯折区1133的容易产生较大应力的区域。
本申请还提供一种显示装置，包括本申请提供的显示面板。本申请提供的显示装置还包括壳体等其他组成部分，在此不做限定。
上述显示面板，柔性屏体的弯折起始位置为弯折区和弯折过渡区连接的位置。缓冲层的不同部分的硬度不同，可以将弯折起始位置附近区域的缓冲层的硬度设置为较大，以支撑柔性屏体的弯折起始位置附近的区域，防止柔性屏体的弯折起始位置附近区域因过度弯曲而导致应力集中，实现对柔性屏体的弯折起始位置附近区域的保护。
上述显示装置，包含本申请提供的显示面板，柔性屏体的弯折起始位置为弯折区和弯折过渡区连接的位置。缓冲层的不同部分具有不同的硬度，可 以将弯折起始位置附近区域的缓冲层的硬度设置为较大，以支撑柔性屏体的弯折起始位置附近的区域，防止柔性屏体的弯折起始位置附近区域因过度弯曲而导致应力集中，实现对柔性屏体的弯折起始位置的保护。
以上所述实施例的各个技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (20)

  1. 一种显示面板，包括：
    柔性屏体，包括第一区域和与所述第一区域连接的第二区域，所述第二区域包括依次连接的弯折过渡区、弯折区和延伸区，所述弯折过渡区连接所述弯折区与所述第一区域，且所述弯折过渡区与所述第一区域共面，所述弯折区与所述延伸区均与所述第一区域不共面；所述第一区域为所述柔性屏体的显示区，所述弯折过渡区为所述柔性屏体的显示区及非显示区二者其中之一，所述弯折区和所述延伸区为所述柔性屏体的非显示区；以及
    缓冲层，设置于所述弯折过渡区和所述弯折区的应力集中侧的表面上，所述缓冲层的不同部分的硬度不同。
  2. 根据权利要求1所述的显示面板，其中，所述缓冲层包括第一子缓冲层和第二子缓冲层，所述第一子缓冲层覆盖所述弯折过渡区并部分覆盖所述弯折区，所述第二子缓冲层部分覆盖所述弯折区，所述第一子缓冲层的硬度大于所述第二子缓冲层的硬度。
  3. 根据权利要求2所述的显示面板，其中，所述第一子缓冲层和第二子缓冲层二者其中至少一者为有机胶层。
  4. 根据权利要求3所述的显示面板，其中，所述第一子缓冲层和第二子缓冲层二者其中至少一者为亚克力胶层、硅胶层、PU胶层、UV胶层或OCA层。
  5. 根据权利要求2所述的显示面板，其中，所述第一子缓冲层的厚度与第二子缓冲层的厚度均沿着从所述第一区域到所述第二区域的方向递减。
  6. 根据权利要求2所述的显示面板，其中，所述第一子缓冲层的厚度大于所述第二子缓冲层的厚度。
  7. 根据权利要求6所述的显示面板，其中，所述第一子缓冲层的厚度为0.1mm，所述第二子缓冲层的厚度为0.075mm。
  8. 根据权利要求2所述的显示面板，其中，所述缓冲层中混合有耐弯折柔性粒子，所述第一子缓冲层中的耐弯折柔性粒子的密度大于所述第二子缓冲层中的耐弯折柔性粒子的密度。
  9. 根据权利要求8所述的显示面板，其中，所述耐弯折柔性粒子包括尼龙粒子或聚甲基丙烯酸甲酯粒子。
  10. 根据权利要求1所述的显示面板，其中，所述弯折过渡区的宽度大于等于0.1mm，小于等于0.5mm。
  11. 根据权利要求2所述的显示面板，还包括用以支撑所述柔性屏体的支撑层，所述第一区域设置于所述支撑层的一侧，所述延伸区设置于所述支撑层的远离所述第一区域的一侧，所述第一子缓冲层远离所述第二子缓冲层的端部与所述支撑层相邻并接触。
  12. 根据权利要求11所述的显示面板，其中，所述支撑层包括设置于所述第一区域靠近所述延伸区的表面上的第一支撑膜、设置于所述延伸区靠近所述第一区域的表面上的第二支撑膜、以及设置于所述第一支撑膜和所述第二支撑膜之间的垫高块。
  13. 根据权利要求12所述的显示面板，其中所述第一子缓冲层远离所述第二子缓冲层的端部与所述第一支撑膜相邻并接触，所述第二支撑膜的靠近所述弯折区的端面与所述弯折区和所述延伸区的连接处所在面共面。
  14. 根据权利要求12所述的显示面板，其中，所述第一支撑膜和所述第二支撑膜的材料包括聚对苯二甲酸乙二醇酯，所述垫高块的材料包括硅胶。
  15. 根据权利要求12所述的显示面板，其中所述第一支撑膜和所述第二支撑膜的厚度大于等于0nm，小于等于0.2mm。
  16. 根据权利要求1所述的显示面板，其中所述弯折区设置有金属走线，所述金属走线上设有孔。
  17. 根据权利要求1所述的显示面板，其中所述弯折区呈弧形。
  18. 根据权利要求1所述的显示面板，其中所述弯折区的弯折角度为180度。
  19. 根据权利要求1所述的显示面板，还包括设置于所述延伸区上的驱动单元和柔性电路板。
  20. 一种显示装置，包括权利要求1至19任一项所述的显示面板。
PCT/CN2019/071829 2018-07-18 2019-01-15 显示面板及显示装置 WO2020015344A1 (zh)

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