WO2021077498A1 - 一种柔性显示面板、显示装置 - Google Patents

一种柔性显示面板、显示装置 Download PDF

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Publication number
WO2021077498A1
WO2021077498A1 PCT/CN2019/118482 CN2019118482W WO2021077498A1 WO 2021077498 A1 WO2021077498 A1 WO 2021077498A1 CN 2019118482 W CN2019118482 W CN 2019118482W WO 2021077498 A1 WO2021077498 A1 WO 2021077498A1
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WIPO (PCT)
Prior art keywords
protrusion
sub
groove
flexible substrate
display panel
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PCT/CN2019/118482
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English (en)
French (fr)
Inventor
杨汉宁
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武汉华星光电半导体显示技术有限公司
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Publication of WO2021077498A1 publication Critical patent/WO2021077498A1/zh

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    • 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

Definitions

  • This application relates to the field of display technology, and in particular to a flexible display panel and a display device.
  • the metal wiring layer 102 of the bending area 101 of the prior art flexible display panel is a metal wire with a specific shape processed above the insulating layer 103; as shown in FIG. 1b, because the flexible display panel
  • the Young's modulus of the flexible substrate 104 below is relatively large, resulting in the neutral layer 105 in the bending area of the flexible display panel being formed under the metal wiring layer 102.
  • the metal wiring is susceptible to stress The damage then causes circuit breakage, which in turn leads to poor display of the panel.
  • the neutral layer in the bending area is formed under the metal wiring layer, resulting in bending
  • the metal traces are susceptible to stress damage and breakage of the circuit, resulting in poor display of the panel. Therefore, it is necessary to improve this defect.
  • the neutral layer in the bending area is formed under the metal wiring layer, which results in metal migration when bending the panel.
  • the wires are susceptible to stress damage and breakage of the wires, leading to technical problems of poor panel display.
  • An embodiment of the present application provides a flexible display panel, the non-display area of the flexible display panel is provided with a bending section.
  • the bending section includes a flexible substrate, an insulating layer disposed on the flexible substrate, a metal wiring layer disposed on the insulating layer, and a flat layer covering the metal wiring layer .
  • the surface of the flexible substrate is provided with a groove for thinning the flexible substrate of the bending section.
  • a blocking passivation layer is attached to the lower surface of the flexible substrate, and the blocking passivation layer corresponds to the non-thinned area of the flexible substrate, and the blocking passivation layer A protruding structure extends from the passivation layer close to the edge of the groove, and the protruding structure is connected to the inner wall of the groove.
  • the protrusion structure and the groove form a snap structure.
  • the protrusion structure includes a first protrusion and a second protrusion disposed oppositely, and the area between the first protrusion and the second protrusion corresponds to the bending Section.
  • the first protrusion includes a first sub-protrusion and a second sub-protrusion
  • the second protrusion includes a third sub-protrusion and a fourth sub-protrusion
  • the first sub-protrusion The cross-sectional shape of the protrusion and the third sub-protrusion is rectangular, and the cross-sectional shape of the second sub-protrusion and the fourth sub-protrusion is a right-angled fan shape, a triangle, or a semicircle.
  • the height of the second sub-protrusion and the fourth sub-protrusion are equal to the depth of the groove, and the first sub-protrusion and the third sub-protrusion The height of is equal to the thickness of the blocking passivation layer, and the cross-sectional width of the first sub-protrusion and the third sub-protrusion are equal to the cross-sectional width of the second sub-protrusion and the fourth sub-protrusion.
  • the cross-sectional shapes of the first protrusion and the second protrusion are both a right-angled sector, a triangle, or a semicircle.
  • the heights of the first protrusion and the second protrusion are equal to the sum of the depth of the groove and the thickness of the blocking passivation layer.
  • the depth of the groove ranges from 3 ⁇ m to 10 ⁇ m.
  • An embodiment of the present application provides a display device, the display device includes a flexible display panel and a driving chip, and a non-display area of the flexible display panel is provided with a bending section.
  • the bending section includes a flexible substrate, an insulating layer provided on the flexible substrate, a metal wiring layer provided on the insulating layer, and a metal wiring layer covering the metal wiring layer.
  • Flat layer wherein, the surface of the flexible substrate is provided with a groove for thinning the flexible substrate of the bending section.
  • a barrier passivation layer is attached to the lower surface of the flexible substrate, and the barrier passivation layer corresponds to the non-thinned area of the flexible substrate, and the barrier passivation A protruding structure extends from the cladding layer near the edge of the groove, and the protruding structure is connected to the inner wall of the groove.
  • the protrusion structure and the groove form a snap structure.
  • the protrusion structure includes a first protrusion and a second protrusion disposed oppositely, and the area between the first protrusion and the second protrusion corresponds to the bending area segment.
  • the first protrusion includes a first sub-protrusion and a second sub-protrusion
  • the second protrusion includes a third sub-protrusion and a fourth sub-protrusion
  • the first sub-protrusion The cross-sectional shape of the third sub-protrusion and the third sub-protrusion is rectangular, and the cross-sectional shape of the second sub-protrusion and the fourth sub-protrusion is a right-angled sector, a triangle, or a semicircle.
  • the height of the second sub-protrusion and the fourth sub-protrusion are equal to the depth of the groove, and the height of the first sub-protrusion and the third sub-protrusion are equal to the depth of the groove.
  • the height is equal to the thickness of the blocking passivation layer, and the cross-sectional width of the first sub-protrusion and the third sub-protrusion are equal to the cross-sectional width of the second sub-protrusion and the fourth sub-protrusion.
  • the cross-sectional shapes of the first protrusion and the second protrusion are both a right-angled sector, a triangle, or a semicircle.
  • the heights of the first protrusion and the second protrusion are equal to the sum of the depth of the groove and the thickness of the blocking passivation layer.
  • the depth of the groove ranges from 3 ⁇ m to 10 ⁇ m.
  • the beneficial effects of the present application are: in the flexible display panel provided by the embodiments of the present application, the neutral layer can be adjusted to the metal wiring layer by overall thinning the flexible substrate in the bending area, so as to reduce line damage and avoid The panel display area shows poor technical effects.
  • FIG. 1a is a basic structure diagram of a flexible display panel provided by the prior art
  • Figure 1b is a schematic diagram of the bending of a flexible display panel provided by the prior art
  • FIG. 2a is a basic structure diagram of a flexible display panel provided by Embodiment 1 of the application;
  • FIG. 2a is a basic structure diagram of a flexible display panel provided by Embodiment 1 of the application;
  • 2b is a schematic diagram of the bending of the flexible display panel provided in the first embodiment of the application.
  • FIG. 3 is a basic structural diagram of a flexible display panel provided by Embodiment 2 of the application.
  • FIG. 4 is a basic structural diagram of a flexible display panel provided in Embodiment 3 of the application.
  • FIG. 5a is a basic structural diagram of a flexible display panel provided by Embodiment 4 of the application.
  • FIG. 5b is a schematic diagram of bending of the flexible display panel provided in the fourth embodiment of the application.
  • FIG. 6 is a basic structural diagram of a flexible display panel provided by Embodiment 5 of the application.
  • FIG. 7 is a basic structural diagram of a flexible display panel provided by Embodiment 6 of the application.
  • the technical means of bending the panel is usually used.
  • FIG. 2a the basic structure diagram of the flexible display panel provided in the first embodiment of the present application can be seen directly from the figure.
  • the components of the flexible display panel and the relative positional relationship between the components, the flexible display panel includes a display area 201 and a non-display area outside the display area.
  • the non-display area includes a binding area 202 and is located in the display area.
  • the bending section 203 between the area 201 and the bonding area 202; bonding is chip wire bonding and chip film coating. It is a wire bonding method in the chip production process. It is generally used for the internal circuit of the chip before packaging.
  • the chip is packaged with black glue.
  • COB Chip On Board
  • the process of this process is to implant the tested epitaxial wafer on a special circuit board, then use gold wire to connect the epitaxial wafer circuit to the circuit board, and then melt the organic film with special protection function. The material is covered on the epitaxial wafer to complete the post-package of the chip.
  • the bending section 203 includes a flexible substrate 204, an insulating layer 205 disposed on the flexible substrate 204, a metal wiring layer 206 disposed on the insulating layer 205, and covering the metal
  • the nature of the layer is determined. After each layer is bent and deformed, the concave side is shortened, and the convex side is elongated. There must be a layer in the middle that has the same length. This layer is called the neutral layer. During the bending process, neither tension nor pressure is exerted, and the stress is almost equal to zero.
  • a neutral layer with the smallest amount of bending deformation is formed in the bending section 203, and the position of the neutral layer is attracted by the high elastic modulus film layer; wherein, the relatively high elastic modulus
  • the surface of the flexible substrate 204 is provided with a groove 208 for thinning the flexible substrate 204 of the bending section 203, so as to reduce the thickness of the flexible substrate 204 of the bending section 203 through debugging.
  • the elastic modulus of the flexible substrate 204 of the bending section 203 is reduced, so that the neutral layer of the bending section 203 is shifted to the metal wiring layer 206, so as to prevent the metal from running.
  • the wire layer is damaged by bending stress, which in turn leads to poor display of the panel.
  • the bending curvature of the panel of the bending section cannot be effectively supported, and the panel cannot maintain its shape after bending.
  • This embodiment of the present application Extending the groove 208 of the flexible substrate 204 to both ends by a predetermined width to form a thinned area 209 of the flexible substrate, the width of the thinned area 209 is greater than the width of the bending section 203;
  • a blocking passivation layer 210 is attached to the lower surface of the flexible substrate, the blocking passivation layer 210 corresponds to the non-thinning area of the flexible substrate 204, and the blocking passivation layer 210 is close to the groove 208
  • a protruding structure extends from the edge of the, and the protruding structure is connected to the inner wall of the groove 208 to support the flexible substrate 204 in the thinned area 209 to prevent the panel from being bent and deformed or broken.
  • the material of the blocking passivation layer 210 is polyethylene terephthalate (PET), which is a milky white or light yellow, highly crystalline polymer with a smooth and shiny surface; It has excellent physical and mechanical properties within a temperature range of up to 120C for long-term use, and has excellent electrical insulation. Even at high temperatures and high frequencies, its electrical properties are still good, but the corona resistance and creep resistance are poor. Fatigue resistance, friction resistance and dimensional stability are all very good.
  • PET polyethylene terephthalate
  • the protrusion structure and the groove 208 form a snap structure, which can prevent the blocking passivation layer 210 from being attached obliquely, thereby improving
  • the bonding accuracy of the blocking passivation layer 210 can ultimately avoid the problems of deformation of the bending area and wire breakage caused by the deviation and tilt of the blocking passivation layer 210.
  • the protrusion structure includes first protrusions and second protrusions disposed oppositely, and the area between the first protrusions and the second protrusions corresponds to the bending section 203, and the
  • the first protrusion includes a first sub-protrusion 211 and a second sub-protrusion 212
  • the second protrusion includes a third sub-protrusion 213 and a fourth sub-protrusion 214
  • the cross-sectional shape is rectangular
  • the cross-sectional shape of the second sub-protrusion 212 and the fourth sub-protrusion 214 is a right-angled fan shape
  • the height of the second sub-protrusion 212 and the fourth sub-protrusion 214 is the same as that of the groove 208
  • the depths of the first sub-protrusion 211 and the third sub-protrusion 213 are equal to the thickness of the blocking passivation layer 210, and the cross-section
  • the thickness of the flexible substrate 204 in the bending section is reduced, so that the flexible substrate in the bending section
  • the elastic modulus of 204 is reduced, so that the neutral layer 215 of the bending section is shifted to the metal wiring layer 206, so as to prevent the metal wiring layer 206 from being damaged by bending stress, thereby causing the panel
  • the display is not good; and the outer sides of the second sub-protrusion 212 and the fourth sub-protrusion 214 are arc-shaped.
  • the basic structure diagram of the flexible display panel provided in the second embodiment of the present application the lower surface of the flexible substrate 301 is provided with a groove, and the groove corresponds to the thinned area 302; the flexible substrate 301 A blocking passivation layer 303 is attached to the lower surface of the, the blocking passivation layer 303 corresponds to the non-thinned area of the flexible substrate 301, and the blocking passivation layer 303 has protrusions extending near the edge of the groove Structure, the protruding structure is connected to the inner wall of the groove and used to support the flexible substrate 301 of the thinned area 302 to prevent the curved panel from being unable to maintain the curvature, deforming or breaking after bending.
  • the protrusion structure includes first protrusions and second protrusions disposed oppositely, and the area between the first protrusions and the second protrusions corresponds to the bending section 308, and the
  • the first protrusion includes a first sub-protrusion 304 and a second sub-protrusion 305
  • the second protrusion includes a third sub-protrusion 306 and a fourth sub-protrusion 307
  • the cross-sectional shape is rectangular
  • the cross-sectional shape of the second sub-protrusion 305 and the fourth sub-protrusion 307 is triangle
  • the height of the second sub-protrusion 305 and the fourth sub-protrusion 307 is equal to the depth of the groove Equal
  • the height of the first sub-protrusion 304 and the third sub-protrusion 306 is equal to the thickness of the blocking passivation layer 303
  • the basic structure diagram of the flexible display panel provided by the third embodiment of the present application
  • the lower surface of the flexible substrate 401 is provided with a groove, and the groove corresponds to the thinned area 402;
  • the flexible substrate 401 A blocking passivation layer 403 is attached to the lower surface of the, the blocking passivation layer 403 corresponds to the non-thinned area of the flexible substrate 401, and the blocking passivation layer 403 has protrusions extending near the edge of the groove Structure, the protruding structure is connected to the inner wall of the groove, and is used to support the flexible substrate 401 in the thinned area 402 to prevent the panel from being bent and deformed or broken.
  • the protrusion structure includes first protrusions and second protrusions disposed oppositely, and the area between the first protrusions and the second protrusions corresponds to the bending section 408, and the
  • the first protrusion includes a first sub-protrusion 404 and a second sub-protrusion 405, the second protrusion includes a third sub-protrusion 406 and a fourth sub-protrusion 407, the first sub-protrusion 404 and the third sub-protrusion 406
  • the cross-sectional shape is rectangular, the cross-sectional shape of the second sub-protrusion 405 and the fourth sub-protrusion 407 is semicircular, and the height of the second sub-protrusion 405 and the fourth sub-protrusion 407 is equal to that of the groove
  • the depths of the first sub-protrusion 404 and the third sub-protrusion 406 are equal to the thickness of the blocking passivation layer 403, and the cross-sections of the first sub-protrusion 404 and
  • the flexible display panel includes a flexible substrate 501, an insulating layer 502 disposed on the flexible substrate 501, and an insulating layer 502 disposed on the flexible substrate 501.
  • the protrusion structure includes a first protrusion 507 and a second protrusion 508 disposed oppositely, and the area between the first protrusion 507 and the second protrusion 508 corresponds to the bending section 509; the first protrusion The cross-sectional shape of 507 and the second protrusion 508 is a right-angled sector; the heights of the first protrusion 507 and the second protrusion 508 are both equal to the depth of the groove and the thickness of the blocking passivation layer 506 And equal.
  • the bending schematic diagram of the flexible display panel provided in the fourth embodiment of the present application, the thickness of the flexible substrate 501 in the bending section is reduced, so that the flexible substrate in the bending section
  • the elastic modulus of 501 is reduced, so that the neutral layer 510 of the bending section is shifted to the metal wiring layer 503, which prevents the metal wiring layer 503 from being damaged by bending stress, thereby causing the panel Poor display; and the outer sides of the first protrusion 507 and the second protrusion 508 are arc-shaped.
  • the flexible display panel When the flexible display panel is bent, it can not only support on both sides of the thinned area, but also support the bending area
  • the middle area of the section can well maintain the shape of the panel bending area.
  • the lower surface of the flexible substrate 601 is provided with a groove, and the groove corresponds to the thinned area 602; the flexible substrate 601 A blocking passivation layer 603 is pasted on the lower surface of the, the blocking passivation layer 603 corresponds to the non-thinned area of the flexible substrate 601, and the blocking passivation layer 603 has protrusions extending near the edge of the groove Structure, the protruding structure is connected to the inner wall of the groove and used to support the flexible substrate 601 of the thinned area 602 to prevent the curvature of the panel from being unable to be maintained after bending, deformation or breakage.
  • the protrusion structure includes a first protrusion 604 and a second protrusion 605 disposed oppositely, and the area between the first protrusion 604 and the second protrusion 605 corresponds to the bending section 606; the first protrusion The cross-sectional shape of 604 and the second protrusion 605 is triangular; the height of the first protrusion 604 and the second protrusion 605 is the sum of the depth of the groove and the thickness of the blocking passivation layer 603 equal.
  • the cross-sectional shape of the first protrusion 604 and the second protrusion 605 is triangular.
  • the first protrusion 604 and the second protrusion 605 can not only be in the The support on both sides of the thinning zone can also support the middle area of the bending zone, thereby realizing the maintenance of the overall shape of the bending zone.
  • the lower surface of the flexible substrate 701 is provided with a groove, and the groove corresponds to the thinned area 702; the flexible substrate 701 A blocking passivation layer 703 is attached to the lower surface of the, the blocking passivation layer 703 corresponds to the non-thinned area of the flexible substrate 701, and the blocking passivation layer 703 has protrusions extending near the edge of the groove Structure, the protruding structure is connected to the inner wall of the groove to support the flexible substrate 701 in the thinned area 702 to prevent the panel from being bent and deformed or broken.
  • the protrusion structure includes a first protrusion 704 and a second protrusion 705 disposed oppositely, and the area between the first protrusion 704 and the second protrusion 705 corresponds to the bending section 706; the first protrusion
  • the cross-sectional shape of the second protrusion 704 and the second protrusion 705 is semicircular; the heights of the first protrusion 704 and the second protrusion 705 are both related to the depth of the groove and the thickness of the blocking passivation layer 703 The sum is equal.
  • the cross-sectional shape of the first protrusion 704 and the second protrusion 705 is semicircular.
  • the first protrusion 704 and the second protrusion 705 can not only The support on both sides of the thinning zone can also support the middle area of the bending zone, so as to maintain the overall shape of the bending zone.
  • An embodiment of the application provides a display device, the display device includes the above-mentioned flexible display panel and a driving chip, the display device may be: a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital camera, a navigator, etc. Products or parts with display functions.
  • the neutral layer can be adjusted to the metal wiring layer by overall thinning the flexible substrate in the bending area, so as to reduce line damage and avoid panel display.
  • the poor technical effect of the display area is solved.
  • the flexible display panel in the prior art has a large Young's modulus of the flexible substrate in the bending area, which causes the neutral layer in the bending area to be formed under the metal wiring layer, resulting in When the panel is bent, the metal traces are susceptible to stress damage and breakage of the circuit, which leads to technical problems of poor display of the panel.

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Abstract

一种柔性显示面板，柔性显示面板的非显示区设置有弯折区段（203），弯折区段（203）包括柔性基板（204）、设置于柔性基板（204）之上的绝缘层（205）、设置于绝缘层（205）之上的金属走线层（206），以及覆盖于金属走线层（206）之上的平坦层（207）；其中，柔性基板（204）表面开设有用以减薄弯折区段（203）的柔性基板（204）的凹槽（208），从而减小弯折区段（203）的柔性基板（204）的弹性模量，使得弯折区段（203）的中性层偏移至金属走线层（206），避免金属走线层（206）受弯曲应力损伤。

Description

一种柔性显示面板、显示装置 技术领域
本申请涉及显示技术领域，尤其涉及一种柔性显示面板、显示装置。
 背景技术
随着科技发展，人们对产品的要求越来越高，全屏无边框的产品，可以使用户获得更好的体验，提高屏占比成为显示市场追求的目标，通过弯折面板的方法提高显示器的屏占比是最有效的技术手段，然而显示面板的弯折区布设有很多金属走线，弯折区较小的弯折半径导致金属走线更容易受到应力损伤发生断裂，进而导致面板的显示区出现不良。
例如图1a所示，现有技术的柔性显示面板的弯折区101的金属走线层102为在绝缘层103上方加工得到的具有特定形状的金属导线；如图1b所示，由于柔性显示面板的下方的柔性基板104的杨氏模量较大，导致柔性显示面板的弯折区的中性层105形成于金属走线层102的下方，在进行弯折面板时，金属走线易受应力损伤进而产生线路断裂，进而导致面板显示不良。
综上所述，现有技术的柔性显示面板，由于弯折区的柔性基板的杨氏模量较大，导致弯折区的中性层形成于金属走线层下方，从而导致在进行弯折面板时，金属走线易受应力损伤而产生线路断裂，导致面板显示不良。故，有必要改善这一缺陷。
 技术问题
现有技术的柔性显示面板，由于弯折区的柔性基板的杨氏模量较大，导致弯折区的中性层形成于金属走线层下方，从而导致在进行弯折面板时，金属走线易受应力损伤而产生线路断裂，导致面板显示不良的技术问题。
 技术解决方案
为解决上述问题，本申请提供的技术方案如下：
本申请实施例提供一种柔性显示面板，所述柔性显示面板的非显示区设置有弯折区段。所述弯折区段包括柔性基板、设置于所述柔性基板之上的绝缘层、设置于所述绝缘层之上的金属走线层，以及覆盖于所述金属走线层之上的平坦层。其中，所述柔性基板表面开设有用以减薄所述弯折区段的所述柔性基板的凹槽。
在本申请实施例所提供的柔性显示面板中，所述柔性基板的下表面贴设有阻挡钝化层，所述阻挡钝化层对应于所述柔性基板的非减薄区，且所述阻挡钝化层靠近所述凹槽的边缘延伸有突起结构，所述突起结构连接于所述凹槽的内壁。
在本申请实施例所提供的柔性显示面板中，所述突起结构与所述凹槽形成卡扣结构。
在本申请实施例所提供的柔性显示面板中，所述突起结构包括相对设置的第一突起和第二突起，所述第一突起与所述第二突起之间的区域对应于所述弯折区段。
在本申请实施例所提供的柔性显示面板中，所述第一突起包括第一子突起和第二子突起，所述第二突起包括第三子突起和第四子突起，所述第一子突起和所述第三子突起的截面形状为矩形，所述第二子突起和所述第四子突起的截面形状为直角扇形、三角形、或者半圆形。
在本申请实施例所提供的柔性显示面板中，所述第二子突起和所述第四子突起的高度与所述凹槽的深度相等，所述第一子突起和所述第三子突起的高度与所述阻挡钝化层的厚度相等，所述第一子突起和所述第三子突起的截面宽度与所述第二子突起和所述第四子突起的截面宽度相等。
在本申请实施例所提供的柔性显示面板中，所述第一突起和所述第二突起的截面形状均为直角扇形、三角形、或者半圆形。
在本申请实施例所提供的柔性显示面板中，所述第一突起和所述第二突起的高度，均与所述凹槽的深度和所述阻挡钝化层的厚度之和相等。
在本申请实施例所提供的柔性显示面板中，所述凹槽的深度范围为3微米至10微米。
本申请实施例提供一种显示装置，所述显示装置包括柔性显示面板和驱动芯片，所述柔性显示面板的非显示区设置有弯折区段。其中，所述弯折区段包括柔性基板、设置于所述柔性基板之上的绝缘层、设置于所述绝缘层之上的金属走线层，以及覆盖于所述金属走线层之上的平坦层。其中，所述柔性基板表面开设有用以减薄所述弯折区段的所述柔性基板的凹槽。
在本申请实施例所提供的显示装置中，所述柔性基板的下表面贴设有阻挡钝化层，所述阻挡钝化层对应于所述柔性基板的非减薄区，且所述阻挡钝化层靠近所述凹槽的边缘延伸有突起结构，所述突起结构连接于所述凹槽的内壁。
在本申请实施例所提供的显示装置中，所述突起结构与所述凹槽形成卡扣结构。
在本申请实施例所提供的显示装置中，所述突起结构包括相对设置的第一突起和第二突起，所述第一突起与所述第二突起之间的区域对应于所述弯折区段。
在本申请实施例所提供的显示装置中，所述第一突起包括第一子突起和第二子突起，所述第二突起包括第三子突起和第四子突起，所述第一子突起和所述第三子突起的截面形状为矩形，所述第二子突起和所述第四子突起的截面形状为直角扇形、三角形、或者半圆形。
在本申请实施例所提供的显示装置中，所述第二子突起和所述第四子突起的高度与所述凹槽的深度相等，所述第一子突起和所述第三子突起的高度与所述阻挡钝化层的厚度相等，所述第一子突起和所述第三子突起的截面宽度与所述第二子突起和所述第四子突起的截面宽度相等。
在本申请实施例所提供的显示装置中，所述第一突起和所述第二突起的截面形状均为直角扇形、三角形、或者半圆形。
在本申请实施例所提供的显示装置中，所述第一突起和所述第二突起的高度，均与所述凹槽的深度和所述阻挡钝化层的厚度之和相等。
在本申请实施例所提供的显示装置中，所述凹槽的深度范围为3微米至10微米。
 有益效果
本申请的有益效果为：本申请实施例提供的一种柔性显示面板，通过对弯折区的柔性基板进行整体减薄可将中性层调整至金属走线层，达到减小线路损伤，避免面板显示区显示不良的技术效果。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1a为现有技术提供的柔性显示面板的基本结构图；
图1b为现有技术提供的柔性显示面板的弯折示意图;
图2a为本申请实施例一提供的柔性显示面板的基本结构图；
图2b为本申请实施例一提供的柔性显示面板的弯折示意图；
图3为本申请实施例二提供的柔性显示面板的基本结构图；
图4为本申请实施例三提供的柔性显示面板的基本结构图；
图5a为本申请实施例四提供的柔性显示面板的基本结构图；
图5b为本申请实施例四提供的柔性显示面板的弯折示意图；
图6为本申请实施例五提供的柔性显示面板的基本结构图；
图7为本申请实施例六提供的柔性显示面板的基本结构图。
本申请的最佳实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
为了提高显示器的屏占比，通常会采用弯折面板的技术手段，如图2a所示，本申请实施例一提供的柔性显示面板的基本结构图，从图中可以很直观地看到本申请的各组成部分，以及各组成部分之间的相对位置关系，所述柔性显示面板包括显示区201以及显示区外侧的非显示区，所述非显示区包括绑定区202、以及位于所述显示区201和所述绑定区202之间的弯折区段203；绑定即芯片打线、芯片覆膜，是芯片生产工艺中一种打线的方式，一般用于封装前将芯片内部电路用金线与封装管脚连接，一般绑定后(即电路与管脚连接后)用黑色胶体将芯片封装，同时采用先进的外封装技术COB(Chip On Board)，这种工艺的流程是将已经测试好的外延片植入到特制的电路板上，然后用金线将外延片电路连接到电路板上，再将融化后具有特殊保护功能的有机材料覆盖到外延片上来完成芯片的后期封装。
其中，所述弯折区段203包括柔性基板204、设置于所述柔性基板204之上的绝缘层205、设置于所述绝缘层205之上的金属走线层206，以及覆盖于所述金属走线层206之上的平坦层207；所述显示区201通过所述金属走线层206，与所述绑定区202相连；当柔性显示面板弯折时，其受力及变形由各膜层的性质来决定，各膜层弯曲变形后，凹入一侧的缩短，凸出一侧的伸长，其中间必定有一层长度不变，这一层称为中性层，中性层在弯曲过程中既不受拉力，又不受压力，应力几乎等于零。
具体地，所述弯折区段203内形成有弯折形变量最小的中性层，所述中性层的位置受高弹性模量膜层地吸引靠近；其中，相对具有高弹性模量的所述柔性基板204表面开设有用以减薄所述弯折区段203的所述柔性基板204的凹槽208，以通过调试减薄所述弯折区段203的所述柔性基板204的厚度来减小所述弯折区段203的所述柔性基板204的弹性模量，使得所述弯折区段203的所述中性层偏移至所述金属走线层206，避免所述金属走线层受弯曲应力损伤，进而导致面板显示不良。
在一种实施例中，弯折区段203的柔性基板204进行整体减薄后，弯折区段的面板的弯曲弧度无法被有效支撑，进而面板在弯折后无法保持形状，本申请实施例将所述柔性基板204的所述凹槽208向两端延伸预设宽度以形成所述柔性基板的减薄区209，所述减薄区209的宽度大于所述弯折区段203的宽度；所述柔性基板的下表面贴设有阻挡钝化层210，所述阻挡钝化层210对应于所述柔性基板204的非减薄区，且所述阻挡钝化层210靠近所述凹槽208的边缘延伸有突起结构，所述突起结构连接于所述凹槽208的内壁，用于支撑所述减薄区209的柔性基板204，防止面板弯折后弧度无法保持，发生变形或者断裂。
在一种实施例中，所述阻挡钝化层210的材料为聚对苯二甲酸乙二醇酯（PET），是乳白色或浅黄色、高度结晶的聚合物，表面平滑有光泽；在较宽的温度范围内具有优良的物理机械性能，长期使用温度可达120C，电绝缘性优良，甚至在高温高频下，其电性能仍较好，但耐电晕性较差，抗蠕变性，耐疲劳性，耐摩擦性、尺寸稳定性都很好。
在一种实施例中，在进行贴合所述阻挡钝化层210时，所述突起结构与所述凹槽208形成卡扣结构，可避免所述阻挡钝化层210倾斜贴附，进而提高所述阻挡钝化层210的贴合精度，最终可避免所述阻挡钝化层210偏移、倾斜等不良导致的弯折区变形、走线断裂的问题。
在一种实施例中，所述突起结构包括相对设置的第一突起和第二突起，所述第一突起与所述第二突起之间的区域对应于所述弯折区段203，所述第一突起包括第一子突起211和第二子突起212，所述第二突起包括第三子突起213和第四子突起214，所述第一子突起211和所述第三子突起213的截面形状为矩形，所述第二子突起212和所述第四子突起214的截面形状为直角扇形，所述第二子突起212和所述第四子突起214的高度与所述凹槽208的深度相等，所述第一子突起211和所述第三子突起213的高度与所述阻挡钝化层210的厚度相等，所述第一子突起211和所述第三子突起213的截面宽度与所述第二子突起212和所述第四子突起214的截面宽度相等；所述凹槽208的深度范围为3微米至10微米。
如图2b所示，本申请实施例一提供的柔性显示面板的弯折示意图，所述弯折区段的所述柔性基板204的厚度减小，使得所述弯折区段的所述柔性基板204的弹性模量减小，从而使得所述弯折区段的所述中性层215偏移至所述金属走线层206，避免所述金属走线层206受弯曲应力损伤，进而导致面板显示不良；且所述第二子突起212和所述第四子突起214的外侧为圆弧形，当柔性显示面板弯折时，可很好地保持面板弯折区的形状。
如图3所示，本申请实施例二提供的柔性显示面板的基本结构图，所述柔性基板301的下表面开设有凹槽，所述凹槽对应于减薄区302；所述柔性基板301的下表面贴设有阻挡钝化层303，所述阻挡钝化层303对应于所述柔性基板301的非减薄区，且所述阻挡钝化层303靠近所述凹槽的边缘延伸有突起结构，所述突起结构连接于所述凹槽的内壁，用于支撑所述减薄区302的柔性基板301，防止面板弯折后弧度无法保持，发生变形或者断裂。
在一种实施例中，所述突起结构包括相对设置的第一突起和第二突起，所述第一突起与所述第二突起之间的区域对应于所述弯折区段308，所述第一突起包括第一子突起304和第二子突起305，所述第二突起包括第三子突起306和第四子突起307，所述第一子突起304和所述第三子突起306的截面形状为矩形，所述第二子突起305和所述第四子突起307的截面形状为三角形，所述第二子突起305和所述第四子突起307的高度与所述凹槽的深度相等，所述第一子突起304和所述第三子突起306的高度与所述阻挡钝化层303的厚度相等，所述第一子突起304和所述第三子突起306的截面宽度与所述第二子突起305和所述第四子突起307的截面宽度相等，所述凹槽的深度范围为3微米至10微米。
如图4所示，本申请实施例三提供的柔性显示面板的基本结构图，所述柔性基板401的下表面开设有凹槽，所述凹槽对应于减薄区402；所述柔性基板401的下表面贴设有阻挡钝化层403，所述阻挡钝化层403对应于所述柔性基板401的非减薄区，且所述阻挡钝化层403靠近所述凹槽的边缘延伸有突起结构，所述突起结构连接于所述凹槽的内壁，用于支撑所述减薄区402的柔性基板401，防止面板弯折后弧度无法保持，发生变形或者断裂。
在一种实施例中，所述突起结构包括相对设置的第一突起和第二突起，所述第一突起与所述第二突起之间的区域对应于所述弯折区段408，所述第一突起包括第一子突起404和第二子突起405，所述第二突起包括第三子突起406和第四子突起407，所述第一子突起404和所述第三子突起406的截面形状为矩形，所述第二子突起405和所述第四子突起407的截面形状为半圆形，所述第二子突起405和所述第四子突起407的高度与所述凹槽的深度相等，所述第一子突起404和所述第三子突起406的高度与所述阻挡钝化层403的厚度相等，所述第一子突起404和所述第三子突起406的截面宽度与所述第二子突起405和所述第四子突起407的截面宽度相等，所述凹槽的深度范围为3微米至10微米。
如图5a所示，本申请实施例四提供的柔性显示面板的基本结构图，所述柔性显示面板包括柔性基板501、设置于所述柔性基板501之上的绝缘层502、设置于所述绝缘层502之上的金属走线层503，以及覆盖于所述金属走线层503之上的平坦层504；所述柔性基板501的下表面开设有凹槽，所述凹槽对应于减薄区505；所述柔性基板501的下表面贴设有阻挡钝化层506，所述阻挡钝化层506对应于所述柔性基板501的非减薄区，且所述阻挡钝化层506靠近所述凹槽的边缘延伸有突起结构，所述突起结构连接于所述凹槽的内壁，用于支撑所述减薄区505的柔性基板501，防止面板弯折后弧度无法保持，发生变形或者断裂。
其中，所述突起结构包括相对设置的第一突起507和第二突起508，所述第一突起507与所述第二突起508之间的区域对应于弯折区段509；所述第一突起507和所述第二突起508的截面形状为直角扇形；所述第一突起507和所述第二突起508的高度，均与所述凹槽的深度和所述阻挡钝化层506的厚度之和相等。
如图5b所示，本申请实施例四提供的柔性显示面板的弯折示意图，所述弯折区段的所述柔性基板501的厚度减小，使得所述弯折区段的所述柔性基板501的弹性模量减小，从而使得所述弯折区段的所述中性层510偏移至所述金属走线层503，避免所述金属走线层503受弯曲应力损伤，进而导致面板显示不良；且所述第一突起507和所述第二突起508的外侧为圆弧形，当柔性显示面板弯折时，不仅可在减薄区两侧支撑，还可支撑所述弯折区段的中部区域，可很好地保持面板弯折区的形状。
如图6所示，本申请实施例五提供的柔性显示面板的基本结构图，所述柔性基板601的下表面开设有凹槽，所述凹槽对应于减薄区602；所述柔性基板601的下表面贴设有阻挡钝化层603，所述阻挡钝化层603对应于所述柔性基板601的非减薄区，且所述阻挡钝化层603靠近所述凹槽的边缘延伸有突起结构，所述突起结构连接于所述凹槽的内壁，用于支撑所述减薄区602的柔性基板601，防止面板弯折后弧度无法保持，发生变形或者断裂。
其中，所述突起结构包括相对设置的第一突起604和第二突起605，所述第一突起604与所述第二突起605之间的区域对应于弯折区段606；所述第一突起604和所述第二突起605的截面形状为三角形；所述第一突起604和所述第二突起605的高度，均与所述凹槽的深度和所述阻挡钝化层603的厚度之和相等。
在一种实施例中，所述第一突起604与所述第二突起605的截面形状为三角形，当面板弯折时，所述第一突起604与所述第二突起605不仅可在所述减薄区两侧支撑，还可支撑所述弯折区的中部区域，进而可实现对弯折区整体形状的保持。
如图7所示，本申请实施例六提供的柔性显示面板的基本结构图，所述柔性基板701的下表面开设有凹槽，所述凹槽对应于减薄区702；所述柔性基板701的下表面贴设有阻挡钝化层703，所述阻挡钝化层703对应于所述柔性基板701的非减薄区，且所述阻挡钝化层703靠近所述凹槽的边缘延伸有突起结构，所述突起结构连接于所述凹槽的内壁，用于支撑所述减薄区702的柔性基板701，防止面板弯折后弧度无法保持，发生变形或者断裂。
其中，所述突起结构包括相对设置的第一突起704和第二突起705，所述第一突起704与所述第二突起705之间的区域对应于弯折区段706；所述第一突起704和所述第二突起705的截面形状为半圆形；所述第一突起704和所述第二突起705的高度，均与所述凹槽的深度和所述阻挡钝化层703的厚度之和相等。
在一种实施例中，所述第一突起704与所述第二突起705的截面形状为半圆形，当面板弯折时，所述第一突起704与所述第二突起705不仅可在所述减薄区两侧支撑，还可支撑所述弯折区的中部区域，进而可实现对弯折区整体形状的保持。
本申请实施例提供一种显示装置，所述显示装置包括上述的柔性显示面板和驱动芯片，该显示装置可以为：手机、平板电脑、电视机、显示器、笔记本电脑、数码相机、导航仪等任何具有显示功能的产品或部件。
综上所述，本申请实施例提供的一种柔性显示面板，通过对弯折区的柔性基板进行整体减薄可将中性层调整至金属走线层，达到减小线路损伤，避免面板显示区显示不良的技术效果，解决了现有技术的柔性显示面板，由于弯折区的柔性基板的杨氏模量较大，导致弯折区的中性层形成于金属走线层下方，从而导致在进行弯折面板时，金属走线易受应力损伤而产生线路断裂，导致面板显示不良的技术问题。
以上对本申请实施例所提供的一种柔性显示面板、显示装置进行了详细介绍。应理解，本文所述的示例性实施方式应仅被认为是描述性的，用于帮助理解本申请的方法及其核心思想，而并不用于限制本申请。

Claims (18)

  1. 一种柔性显示面板，所述柔性显示面板的非显示区设置有弯折区段，其中，所述弯折区段包括柔性基板、设置于所述柔性基板之上的绝缘层、设置于所述绝缘层之上的金属走线层，以及覆盖于所述金属走线层之上的平坦层；
    其中，所述柔性基板表面开设有用以减薄所述弯折区段的所述柔性基板的凹槽。
  2. 如权利要求1所述的柔性显示面板，其中，所述柔性基板的下表面贴设有阻挡钝化层，所述阻挡钝化层对应于所述柔性基板的非减薄区，且所述阻挡钝化层靠近所述凹槽的边缘延伸有突起结构，所述突起结构连接于所述凹槽的内壁。
  3. 如权利要求2所述的柔性显示面板，其中，所述突起结构与所述凹槽形成卡扣结构。
  4. 如权利要求2所述的柔性显示面板，其中，所述突起结构包括相对设置的第一突起和第二突起，所述第一突起与所述第二突起之间的区域对应于所述弯折区段。
  5. 如权利要求4所述的柔性显示面板，其中，所述第一突起包括第一子突起和第二子突起，所述第二突起包括第三子突起和第四子突起，所述第一子突起和所述第三子突起的截面形状为矩形，所述第二子突起和所述第四子突起的截面形状为直角扇形、三角形、或者半圆形。
  6. 如权利要求5所述的柔性显示面板，其中，所述第二子突起和所述第四子突起的高度与所述凹槽的深度相等，所述第一子突起和所述第三子突起的高度与所述阻挡钝化层的厚度相等，所述第一子突起和所述第三子突起的截面宽度与所述第二子突起和所述第四子突起的截面宽度相等。
  7. 如权利要求4所述的柔性显示面板，其中，所述第一突起和所述第二突起的截面形状均为直角扇形、三角形、或者半圆形。
  8. 如权利要求7所述的柔性显示面板，其中，所述第一突起和所述第二突起的高度，均与所述凹槽的深度和所述阻挡钝化层的厚度之和相等。
  9. 如权利要求1所述的柔性显示面板，其中，所述凹槽的深度范围为3微米至10微米。
  10. 一种显示装置，其中，所述显示装置包括柔性显示面板和驱动芯片，所述柔性显示面板的非显示区设置有弯折区段，其中，所述弯折区段包括柔性基板、设置于所述柔性基板之上的绝缘层、设置于所述绝缘层之上的金属走线层，以及覆盖于所述金属走线层之上的平坦层；
    其中，所述柔性基板表面开设有用以减薄所述弯折区段的所述柔性基板的凹槽。
  11. 如权利要求10所述的显示装置，其中，所述柔性基板的下表面贴设有阻挡钝化层，所述阻挡钝化层对应于所述柔性基板的非减薄区，且所述阻挡钝化层靠近所述凹槽的边缘延伸有突起结构，所述突起结构连接于所述凹槽的内壁。
  12. 如权利要求11所述的显示装置，其中，所述突起结构与所述凹槽形成卡扣结构。
  13. 如权利要求11所述的显示装置，其中，所述突起结构包括相对设置的第一突起和第二突起，所述第一突起与所述第二突起之间的区域对应于所述弯折区段。
  14. 如权利要求13所述的显示装置，其中，所述第一突起包括第一子突起和第二子突起，所述第二突起包括第三子突起和第四子突起，所述第一子突起和所述第三子突起的截面形状为矩形，所述第二子突起和所述第四子突起的截面形状为直角扇形、三角形、或者半圆形。
  15. 如权利要求14所述的显示装置，其中，所述第二子突起和所述第四子突起的高度与所述凹槽的深度相等，所述第一子突起和所述第三子突起的高度与所述阻挡钝化层的厚度相等，所述第一子突起和所述第三子突起的截面宽度与所述第二子突起和所述第四子突起的截面宽度相等。
  16. 如权利要求13所述的显示装置，其中，所述第一突起和所述第二突起的截面形状均为直角扇形、三角形、或者半圆形。
  17. 如权利要求16所述的显示装置，其中，所述第一突起和所述第二突起的高度，均与所述凹槽的深度和所述阻挡钝化层的厚度之和相等。
  18. 如权利要求10所述的显示装置，其中，所述凹槽的深度范围为3微米至10微米。
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