WO2021031413A1 - 显示面板及其制备方法、显示装置 - Google Patents

显示面板及其制备方法、显示装置 Download PDF

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Publication number
WO2021031413A1
WO2021031413A1 PCT/CN2019/118708 CN2019118708W WO2021031413A1 WO 2021031413 A1 WO2021031413 A1 WO 2021031413A1 CN 2019118708 W CN2019118708 W CN 2019118708W WO 2021031413 A1 WO2021031413 A1 WO 2021031413A1
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WO
WIPO (PCT)
Prior art keywords
bending
panel
display
bent
display area
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Application number
PCT/CN2019/118708
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English (en)
French (fr)
Inventor
何平
贾成杰
Original Assignee
武汉华星光电半导体显示技术有限公司
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Application filed by 武汉华星光电半导体显示技术有限公司 filed Critical 武汉华星光电半导体显示技术有限公司
Priority to US16/646,581 priority Critical patent/US20210407333A1/en
Publication of WO2021031413A1 publication Critical patent/WO2021031413A1/zh

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Classifications

    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G06F1/1652—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being flexible, e.g. mimicking a sheet of paper, or rollable
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • 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
    • G09F9/33—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 being semiconductor devices, e.g. diodes
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • 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
    • 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

Definitions

  • the invention relates to the field of displays, in particular to a display panel, a preparation method thereof, and a display device.
  • OLED Display has the advantages of being light and thin, bendable, and foldable, it can be used in flexible display products such as foldable mobile phones, smart watches, and car displays.
  • FIG. 1 a schematic diagram of a flat state of a flexible foldable display module in the prior art is shown, including a display area 100 and a bending area 200, and the bending area 200 includes a flip chip film and a flexible circuit board.
  • the foldable display module needs to reserve a wider border on the panel, and the module has a wider border when combined with a cover window, resulting in a larger border of the foldable display product, which affects the user's visual experience.
  • the purpose of the present invention is to solve the technical problem that the existing display device has a wide frame, which further affects the user's visual experience.
  • the present invention provides a display panel including: a display area; a bending area connected to any side of the display area and bent to the back of the display area; and a flip chip film , Connected to the bending area.
  • the display area includes: a first side and a second side that are parallel to each other; and a third side and a fourth side that are parallel to each other.
  • the bending area includes: a first bending portion, which is bent to the back of the display area at the first side; and a second bending portion, which is bent at the second side Bend to the back of the display area; a third bending portion that is bent to the back of the display area at the third side; and a fourth bending portion at the fourth side It is bent to the back of the display area.
  • the chip on film is connected to the fourth bending portion of the bending area.
  • first bending portion is provided with a first groove; and/or, the second bending portion is provided with a second groove.
  • the shape of the first groove includes any one of trapezoid, triangle, or rectangle; and/or, the shape of the second groove includes any one of trapezoid, triangle, or rectangle.
  • the present invention also provides a display device including the display panel described above.
  • the present invention also provides a method for manufacturing a display panel, including the following steps: a panel providing step, providing a panel; and a bending step, bending the side edge of the panel to the back of the panel.
  • the bending step includes the following steps: a first bending step, bending the first side edge of the panel to the back of the panel; and a second bending step, bending the second side of the panel Bend to the back of the panel; in the third bending step, bend the third side of the panel to the back of the panel; and in the fourth bending step, bend the fourth side of the panel Bend to the back of the panel.
  • the step of providing the panel includes a grooving step, and the grooving process is performed on the first side and the third side of the panel.
  • the technical effect of the present invention is that the display area is partially bent to the back, so that the front of the display device is an effective display area, and the visual effect without borders is realized. Slotting on part of the bending part can relieve stress when the bending part is bent, and improve the bendability of the display device.
  • FIG. 1 is a schematic diagram of the structure of a display panel before bending in the prior art
  • FIG. 2 is a schematic diagram of the structure of the display panel according to the first embodiment of the present invention before bending;
  • FIG. 3 is a front view of the display panel according to the first embodiment of the present invention after being bent;
  • FIG. 4 is a schematic structural diagram of the back of the display panel after bending according to the embodiment 1 of the present invention.
  • FIG. 5 is a flowchart of a manufacturing method of a display panel according to an embodiment of the present invention.
  • Fig. 6 is a flowchart of the bending step according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of the structure of the display panel with rectangular grooves according to Embodiment 2 of the present invention.
  • FIG. 8 is a schematic diagram of the structure of the display panel with trapezoidal grooves according to Embodiment 2 of the present invention.
  • FIG. 9 is a schematic structural diagram of a display panel with triangular grooves according to Embodiment 2 of the present invention.
  • FIG. 10 is a schematic structural diagram of the display panel according to Embodiment 2 of the present invention with irregularly arranged rectangular grooves.
  • the component can be directly placed on the other component; there may also be an intermediate component on which the component is placed , And the intermediate component is placed on another component.
  • a component is described as “installed to” or “connected to” another component, both can be understood as directly “installed” or “connected”, or a component is “installed to” or “connected to” through an intermediate component Another component.
  • the display device includes a display panel as shown in FIGS. 2 to 4.
  • the display panel includes a display area 1, a bending area 2, a chip on film 3 and a flexible circuit board 4.
  • FIG. 2 is a schematic structural diagram of the display panel before bending
  • FIG. 3 is a front view of the display panel after bending
  • FIG. 4 is a schematic structural diagram of the back of the display panel after bending.
  • the display area 1 includes a first side 11, a third side 13, a second side 12, and a fourth side 14 that are connected end to end. In this embodiment, they are arranged in a clockwise direction.
  • the first side 11 and the second side 12 are parallel to each other, and the third side 13 and the fourth side 14 are parallel to each other.
  • the bending area 2 includes a first bending portion 21, a second bending portion 22, a third bending portion 23 and a fourth bending portion 24.
  • the first bending portion 21 is bent to the back of the display area 1 at the first side 11
  • the second bending portion 22 is bent to the back of the display area 1 at the second side 12
  • the third bending The portion 23 is bent to the back of the display area 1 at the third side 13
  • the fourth bent portion 24 is bent to the back of the display area 1 at the fourth side 14.
  • the length of the first bending portion 21 is the same as the length of the display area 1
  • the length of the second bending portion 22 is the same as the length of the display area 1
  • the length of the third bending portion 23 is the same as the width of the display area 1.
  • the length of the bent portion 24 is the same as the width of the display area 1.
  • the bent display area 1 is the effective display area. Since part of the display area is bent to the back, the frame of the original display area is also bent to the back of the display area, so that the front of the display device has no frame, which is visually The above can achieve a borderless effect, increase the screen-to-body ratio of the display device, and further improve the user's visual experience when using it.
  • the width of the bending part is as small as possible.
  • the width of the first bending part 21 is 0.3mm ⁇ 1mm
  • the width of the second bending part 22 is 0.3mm ⁇ 1mm
  • the width of the third bending part 22 is 0.3mm ⁇ 1mm.
  • the width of the folded portion 23 is 0.3 mm to 1 mm
  • the width of the fourth folded portion 24 is 0.3 mm to 1 mm.
  • Adjusting the pixel drive current of the display device to zero makes any bent portion displayed in black, which is equivalent to that the bent portion bent to the back of the display area 1 is not displayed.
  • part of any bending part is a curved surface, and the radius of the curved surface is 1.5 mm.
  • the curved surface can be used for display, which is equivalent to a display device with a curved screen, such as an existing curved screen mobile phone.
  • the chip on film 3 is connected to the fourth bending portion 24, and the flexible circuit board 4 is provided on the chip on film 3.
  • the fourth bending portion 24 is bent, the chip on film 3 and the flexible circuit board 4 are bent together To the back of display area 1.
  • a cover window is covered above the display area 1.
  • the cover window does not require printing ink to improve the overall strength of the display device, so that the display panel can be more easily bonded to other parts of the display device.
  • the technical effect of the display device described in this embodiment is that the display area is partially bent to the back, so that the front of the display device is an effective display area, and the visual effect without borders is realized.
  • this embodiment also provides a method for manufacturing a display panel, including steps S1 to S2.
  • the panel providing step is to provide a panel including a first side, a third side, a second side, and a fourth side that are connected end to end.
  • the fourth side is connected with a flip chip film and a flexible circuit board.
  • the panel has a special-shaped structure and is provided with a protruding portion at any side thereof, wherein the length of the first protruding portion at the first side is the same as the length of the first side, and the first side
  • the length of the second protrusion at the two sides is the same as the length of the second side
  • the length of the third protrusion at the third side is the same as the length of the third side
  • the first The length of the fourth protrusion at the four sides is the same as the length of the fourth side.
  • the bending step includes steps S21 to S24.
  • the second bending step is to bend the second protrusion of the panel to be fixed to the back of the panel to form the second bending part.
  • the pixel driving current of the display device can be adjusted to zero, so that any bent portion is displayed in black on the back surface, which is equivalent to not displaying.
  • a cover window can be covered above the display area.
  • the cover window does not require printing ink to improve the overall strength of the display device, so that the display panel can be more easily bonded to other parts of the display device.
  • the cover plate does not have the visible area (VA area) in the prior art, so that the front of the display device has no border, which visually forms a borderless effect, increases the screen-to-body ratio of the display device, and further improves the user's visual experience.
  • the technical effect of the manufacturing method of the display panel of this embodiment is that the display area is partially bent to the back, so that the front of the display device is an effective display area, and the visual effect without borders is realized.
  • the display device includes a display panel as shown in FIG. 7.
  • the display panel includes a display area 1, a bending area 2, a flip-chip film 3 and a flexible circuit board 4.
  • the display area 1 includes a first side 11, a third side 13, a second side 12, and a fourth side 14 that are connected end to end. In this embodiment, they are arranged in a clockwise direction.
  • the first side 11 and the second side 12 are parallel to each other, and the third side 13 and the fourth side 14 are parallel to each other.
  • the bending area 2 includes a first bending portion 21, a second bending portion 22, a third bending portion 23 and a fourth bending portion 24.
  • the first bending portion 21 is bent to the back of the display area 1 at the first side 11
  • the second bending portion 22 is bent to the back of the display area 1 at the second side 12
  • the third bending The portion 23 is bent to the back of the display area 1 at the third side 13
  • the fourth bent portion 24 is bent to the back of the display area 1 at the fourth side 14.
  • the length of the first bending portion 21 is the same as the length of the display area 1
  • the length of the second bending portion 22 is the same as the length of the display area 1
  • the length of the third bending portion 23 is the same as the width of the display area 1.
  • the length of the bent portion 24 is the same as the width of the display area 1.
  • a first groove 211 is provided on the first bending portion 21.
  • the shape of the first groove 211 is not limited. In this embodiment, it is preferably a rectangular groove arranged regularly, and the first groove 211 is provided to relieve the first groove. The stress during the bending of the bending portion 21 prevents breakage during bending and improves the bendability of the display device.
  • the second bending portion 22 is provided with a second groove 221.
  • the shape of the second groove 221 is not limited. In this embodiment, it is preferably a rectangular groove arranged regularly, and the second groove 221 is provided to relieve the second The stress during bending of the bending portion 22 prevents breakage during bending and improves the bendability of the display device.
  • the shape of the groove may be a trapezoid (see FIG. 8), a triangle (see FIG. 9), or an irregularly arranged rectangle (see FIG. 10).
  • Different groove shapes mean that the edges of the display area will be correspondingly different.
  • the bent display area 1 is the effective display area. Since part of the display area is bent to the back, the frame of the original display area is also bent to the back of the display area, so that the front of the display device has no frame, which is visually The above can achieve a borderless effect, increase the screen-to-body ratio of the display device, and further improve the user's visual experience when using it.
  • the width of the bending part is as small as possible.
  • the width of the first bending part 21 is 0.3mm ⁇ 1mm
  • the width of the second bending part 22 is 0.3mm ⁇ 1mm
  • the width of the third bending part 22 is 0.3mm ⁇ 1mm.
  • the width of the folded portion 23 is 0.3 mm to 1 mm
  • the width of the fourth folded portion 24 is 0.3 mm to 1 mm.
  • Adjusting the pixel drive current of the display device to zero makes any bent portion displayed in black, which is equivalent to that the bent portion bent to the back of the display area 1 is not displayed.
  • part of any bending part is a curved surface, and the radius of the curved surface is 1.5 mm.
  • the curved surface can be used for display, which is equivalent to a display device with a curved screen, such as an existing curved screen mobile phone.
  • the chip on film 3 is connected to the fourth bending portion 24, and the flexible circuit board 4 is provided on the chip on film 3.
  • the fourth bending portion 24 is bent, the chip on film 3 and the flexible circuit board 4 are bent together To the back of display area 1.
  • a cover window is covered above the display area 1.
  • the cover window does not require printing ink to improve the overall strength of the display device, so that the display panel can be more easily bonded to other parts of the display device.
  • the technical effect of the display device described in this embodiment is that the display area is partially bent to the back, so that the front of the display device is an effective display area, and the visual effect without borders is realized. Slotting on part of the bending part can relieve stress when the bending part is bent, and improve the bendability of the display device.
  • this embodiment also provides a method for manufacturing a display panel, including steps S1 to S2.
  • the panel providing step is to provide a panel including a first side, a third side, a second side, and a fourth side that are connected end to end.
  • the fourth side is connected with a flip chip film and a flexible circuit board.
  • the panel has a special-shaped structure and is provided with a protruding portion at any side thereof, wherein the length of the first protruding portion at the first side is the same as the length of the first side, and the first side
  • the length of the second protrusion at the two sides is the same as the length of the second side
  • the length of the third protrusion at the third side is the same as the length of the third side
  • the first The length of the fourth protrusion at the four sides is the same as the length of the fourth side.
  • the panel providing step further includes a grooving step.
  • a first groove is opened on the first protrusion of the panel, and a second groove is opened on the second protrusion.
  • the shape of the first groove may be any one of regularly arranged rectangles, trapezoids, triangles or irregularly arranged rectangles
  • the shape of the second grooves may be regularly arranged rectangles, trapezoids, triangles or irregularly arranged rectangles Any of them.
  • the bending step includes steps S21 to S24.
  • the pixel driving current of the display device can be adjusted to zero, so that any bent portion is displayed in black on the back surface, which is equivalent to not displaying.
  • a cover window can be covered above the display area.
  • the cover window does not require printing ink to improve the overall strength of the display device, so that the display panel can be more easily bonded to other parts of the display device.
  • the cover plate does not have the visible area (VA area) in the prior art, so that the front of the display device is borderless, which visually forms a borderless effect, increases the screen-to-body ratio of the display device, and further improves the user's visual experience.
  • the technical effect of the manufacturing method of the display panel of this embodiment is that the display area is partially bent to the back, so that the front of the display device is an effective display area, and the visual effect without borders is realized. Slotting on part of the bending part can relieve stress when the bending part is bent, and improve the bendability of the display device.

Abstract

本发明提供一种显示面板及其制备方法、显示装置，所述显示面板包括显示区；以及弯折区，连接至所述显示区，且被弯折至所述显示区的背面；所述弯折区包括：第一弯折区；以及第二弯折区，包括覆晶薄膜及柔性电路板。所述显示面板的制备方法包括面板提供步骤以及弯折步骤。

Description

显示面板及其制备方法、显示装置 技术领域
本发明涉及显示器领域，特别涉及一种显示面板及其制备方法、显示装置。
 背景技术
由于OLED Display具有轻薄、可弯曲、可折叠等优点，可被用于可折叠手机、智能手表以及车载显示器等柔性显示产品。
如图1所示，给出了现有技术的柔性可折叠显示模组展平状态的示意图，包括显示区100及弯折区200，弯折区200包括覆晶薄膜及柔性线路板。目前可折叠显示模组因面板需预留较宽的边框（border），搭配上盖板（Cover Window）后模组边框较宽，导致可折叠显示产品边框较大，影响用户的视觉体验。
 技术问题
本发明的目的在于，解决现有的显示装置边框宽，进而影响用户视觉体验的技术问题。
 技术解决方案
为实现上述目的，本发明提供一种显示面板，包括：显示区；弯折区，连接至所述显示区的任一侧边，且被弯折至所述显示区的背面；以及覆晶薄膜，连接至弯折区。
进一步地，所述显示区包括：相互平行的第一侧边及第二侧边；以及相互平行的第三侧边及第四侧边。
进一步地，所述弯折区包括：第一弯折部，在所述第一侧边处被弯折至所述显示区的背面；第二弯折部，在所述第二侧边处被弯折至所述显示区的背面；第三弯折部，在所述第三侧边处被弯折至所述显示区的背面；以及第四弯折部，在所述第四侧边处被弯折至所述显示区的背面。
进一步地，所述覆晶薄膜连接至所述弯折区的第四弯折部。
进一步地，所述第一弯折部设有第一凹槽；和/或，所述第二弯折部设有第二凹槽。
进一步地，所述第一凹槽的形状包括梯形、三角形或矩形中的任一种；和/或，所述第二凹槽的形状包括梯形、三角形或矩形中的任一种。
为实现上述目的，本发明还提供一种显示装置，包括前文所述的显示面板。
为实现上述目的，本发明还提供一种显示面板的制备方法，包括以下步骤：面板提供步骤，提供一面板；以及弯折步骤，将所述面板的侧边弯折至所述面板的背面。
进一步地，所述弯折步骤包括以下步骤：第一弯折步骤，将所述面板的第一侧边弯折至所述面板的背面；第二弯折步骤，将所述面板的第二侧边弯折至所述面板的背面；第三弯折步骤，将所述面板的第三侧边弯折至所述面板的背面；以及第四弯折步骤，将所述面板的第四侧边弯折至所述面板的背面。
进一步地，所述面板提供步骤包括开槽步骤，在所述面板的第一侧边及第三侧边进行开槽处理。
 有益效果
本发明的技术效果在于，将显示区部分地弯折至背面，使得显示装置的正面均为有效显示区，实现无边框的视觉效果。在部分弯折部上开槽，可在弯折部弯折时缓解应力，提升显示装置的可弯折性。
 附图说明
图1为现有技术中显示面板弯折前的结构示意图；
图2为本发明实施例1所述显示面板弯折前的结构示意图；
图3为本发明实施例1所述显示面板弯折后的正视图；
图4为本发明实施例1所述显示面板弯折后的背面的结构示意图；
图5为本发明实施例所述显示面板的制备方法的流程图；
图6为本发明实施例所述弯折步骤的流程图；
图7为本发明实施例2所述显示面板开矩形槽的结构示意图；
图8为本发明实施例2所述显示面板开梯形槽的结构示意图；
图9为本发明实施例2所述显示面板开三角形槽的结构示意图；
图10为本发明实施例2所述显示面板开不规律排列矩形槽的结构示意图。
部分组件标识如下：
100、显示区；200、弯折区；
1、显示区；2、弯折区；3、覆晶薄膜；4、柔性线路板；
11、第一侧边；12、第二侧边；13、第三侧边；14、第四侧边；
21、第一弯折部；22、第二弯折部；23、第三弯折部；24、第四弯折部；
211、第一凹槽；221、第二凹槽。
 本发明的最佳实施方式
以下结合说明书附图详细说明本发明的优选实施例，以向本领域中的技术人员完整介绍本发明的技术内容，以举例证明本发明可以实施，使得本发明公开的技术内容更加清楚，使得本领域的技术人员更容易理解如何实施本发明。然而本发明可以通过许多不同形式的实施例来得以体现，本发明的保护范围并非仅限于文中提到的实施例，下文实施例的说明并非用来限制本发明的范围。
本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是附图中的方向，本文所使用的方向用语是用来解释和说明本发明，而不是用来限定本发明的保护范围。
在附图中，结构相同的部件以相同数字标号表示，各处结构或功能相似的组件以相似数字标号表示。此外，为了便于理解和描述，附图所示的每一组件的尺寸和厚度是任意示出的，本发明并没有限定每个组件的尺寸和厚度。
当某些组件，被描述为“在”另一组件“上”时，所述组件可以直接置于所述另一组件上；也可以存在一中间组件，所述组件置于所述中间组件上，且所述中间组件置于另一组件上。当一个组件被描述为“安装至”或“连接至”另一组件时，二者可以理解为直接“安装”或“连接”，或者一个组件通过一中间组件“安装至”或“连接至”另一个组件。
实施例1                             
本实施例提供一种显示装置，所述显示装置包括如图2-图4所示的显示面板，所述显示面板包括显示区1、弯折区2、覆晶薄膜3及柔性线路板4。
图2为所述显示面板弯折之前的结构示意图，图3为所述显示面板弯折后的正视图，图4为所述显示面板弯折后的背面结构示意图。
显示区1包括首尾相接的第一侧边11、第三侧边13、第二侧边12及第四侧边14，在本实施例中，呈顺时针排列。第一侧边11与第二侧边12相互平行，第三侧边13与第四侧边14相互平行。
弯折区2包括第一弯折部21、第二弯折部22、第三弯折部23及第四弯折部24。
第一弯折部21在第一侧边11处被弯折至显示区1的背面，第二弯折部22在第二侧边12处被弯折至显示区1的背面，第三弯折部23在第三侧边13处被弯折至显示区1的背面，第四弯折部24在第四侧边14处被弯折至显示区1的背面。
第一弯折部21的长度与显示区1的长度相同，第二弯折部22的长度与显示区1的长度相同，第三弯折部23的长度与显示区1的宽度相同，第四弯折部24的长度与显示区1的宽度相同。
弯折后的显示区1为有效显示区，由于部分显示区被弯折至背面，所以原有的显示区的边框也被弯折至显示区的背面，使得显示装置的正面无边框，在视觉上可实现无边框的效果，提高显示装置的屏占比，可进一步提高用户使用时的视觉体验。
弯折部的宽度越小越好，在本实施例中，优选地，第一弯折部21的宽度为0.3mm~1mm，第二弯折部22的宽度为0.3mm~1mm，第三弯折部23的宽度为0.3mm~1mm，第四弯折部24的宽度为0.3mm~1mm。
将显示装置的像素驱动电流调节至零，使得任一弯折部显示为黑色，即相当于被弯折到显示区1背面的弯折部不显示。
在弯折过程中，任一弯折部有部分为曲面，所述曲面的半径为1.5mm，所述曲面可用以显示，相当于具有曲面屏的显示装置，如现有的曲面屏手机等。
覆晶薄膜3连接至第四弯折部24，覆晶薄膜3上设有柔性线路板4，在第四弯折部24被弯折时，覆晶薄膜3与柔性线路板4一起被弯折至显示区1的背面。
在显示区1的上方覆盖一层盖板（cover window），所述盖板无需印刷油墨，用以提高显示装置的整体强度，使得显示面板更易粘合至显示装置的其他部件，所述盖板不存在现有技术中的可视区（VA区），使得显示装置的正面无边框，在视觉上形成无边框的效果，提高显示装置的屏占比，可进一步提高用户的视觉体验。
本实施例所述的显示装置的技术效果在于，将显示区部分地弯折至背面，使得显示装置的正面均为有效显示区，实现无边框的视觉效果。
如图5所示，本实施例还提供一种显示面板的制备方法，包括步骤S1~S2。
S1 面板提供步骤，提供一面板，所述面板包括首尾相接的第一侧边第三侧边、第二侧边及第四侧边，所述第四侧边处连接有覆晶薄膜及柔性线路板。所述面板为异形结构，在其任一侧边处均设有一突出部，其中，所述第一侧边处的第一突出部的长度与所述第一侧边的长度相同，所述第二侧边处的第二突出部的长度与所述第二侧边的长度相同，所述第三侧边处的第三突出部的长度与所述第三侧边的长度相同，所述第四侧边处的第四突出部的长度与所述第四侧边的长度相同。
S2 弯折步骤，弯折所述突出部，形成弯折区。
如图6所示，所述弯折步骤包括步骤S21~S24。
S21 第一弯折步骤，弯折所述面板的第一突出部，使其被固定至所述面板的背部，形成第一弯折部。
S22 第二弯折步骤，弯折所述面板的第二突出部，使其被固定至所述面板的背部，形成第二弯折部。
S23 第三弯折步骤，弯折所述面板的第三突出部，使其被固定至所述面板的背部，形成第三弯折部。
S24 第四弯折步骤，弯折所述面板的第四突出部，使其被固定至所述面板的背部，形成第四弯折部，同时，设于所述第四弯折部上的覆晶薄膜与柔性线路板也被弯折至所述面板的背面。此时，未被弯折的面板即为显示区，用以正常显示。
可通过调节显示装置的像素驱动电流至零，使得任一弯折部在所述背面显示为黑色，相当于不显示。
可在所述显示区的上方覆盖一层盖板（cover window），所述盖板无需印刷油墨，用以提高显示装置的整体强度，使得显示面板更易粘合至显示装置的其他部件，所述盖板不存在现有技术中的可视区（VA区），使得显示装置的正面无边框，在视觉上形成无边框的效果，提高显示装置的屏占比，可进一步提高用户的视觉体验。
本实施例所述显示面板的制备方法的技术效果在于，将显示区部分地弯折至背面，使得显示装置的正面均为有效显示区，实现无边框的视觉效果。
实施例2
本实施例提供一种显示装置，所述显示装置包括如图7所示的显示面板，所述显示面板包括显示区1、弯折区2、覆晶薄膜3及柔性线路板4。
显示区1包括首尾相接的第一侧边11、第三侧边13、第二侧边12及第四侧边14，在本实施例中，呈顺时针排列。第一侧边11与第二侧边12相互平行，第三侧边13与第四侧边14相互平行。
弯折区2包括第一弯折部21、第二弯折部22、第三弯折部23及第四弯折部24。
第一弯折部21在第一侧边11处被弯折至显示区1的背面，第二弯折部22在第二侧边12处被弯折至显示区1的背面，第三弯折部23在第三侧边13处被弯折至显示区1的背面，第四弯折部24在第四侧边14处被弯折至显示区1的背面。
第一弯折部21的长度与显示区1的长度相同，第二弯折部22的长度与显示区1的长度相同，第三弯折部23的长度与显示区1的宽度相同，第四弯折部24的长度与显示区1的宽度相同。
第一弯折部21上设有第一凹槽211，第一凹槽211的形状不限定，在本实施例中，优选为规律排列的矩形槽，开设第一凹槽211用以缓解第一弯折部21弯折时的应力，防止弯折时出现断裂等现象，提升显示装置的可弯折性。
第二弯折部22上设有第二凹槽221，第二凹槽221的形状不限定，在本实施例中，优选为规律排列的矩形槽，开设第二凹槽221用以缓解第二弯折部22弯折时的应力，防止弯折时出现断裂等现象，提升显示装置的可弯折性。
在其他实施例中，凹槽的形状可为梯形（参见图8）、三角形（参见图9）或是不规律排列的矩形（参见图10）。不同的凹槽形状意味着显示区的边缘也会相应的不一样。
弯折后的显示区1为有效显示区，由于部分显示区被弯折至背面，所以原有的显示区的边框也被弯折至显示区的背面，使得显示装置的正面无边框，在视觉上可实现无边框的效果，提高显示装置的屏占比，可进一步提高用户使用时的视觉体验。
弯折部的宽度越小越好，在本实施例中，优选地，第一弯折部21的宽度为0.3mm~1mm，第二弯折部22的宽度为0.3mm~1mm，第三弯折部23的宽度为0.3mm~1mm，第四弯折部24的宽度为0.3mm~1mm。
将显示装置的像素驱动电流调节至零，使得任一弯折部显示为黑色，即相当于被弯折到显示区1背面的弯折部不显示。
在弯折过程中，任一弯折部有部分为曲面，所述曲面的半径为1.5mm，所述曲面可用以显示，相当于具有曲面屏的显示装置，如现有的曲面屏手机等。
覆晶薄膜3连接至第四弯折部24，覆晶薄膜3上设有柔性线路板4，在第四弯折部24被弯折时，覆晶薄膜3与柔性线路板4一起被弯折至显示区1的背面。
在显示区1的上方覆盖一层盖板（cover window），所述盖板无需印刷油墨，用以提高显示装置的整体强度，使得显示面板更易粘合至显示装置的其他部件，所述盖板不存在现有技术中的可视区（VA区），使得显示装置的正面无边框，在视觉上形成无边框的效果，提高显示装置的屏占比，可进一步提高用户的视觉体验。
本实施例所述的显示装置的技术效果在于，将显示区部分地弯折至背面，使得显示装置的正面均为有效显示区，实现无边框的视觉效果。在部分弯折部上开槽，可在弯折部弯折时缓解应力，提升显示装置的可弯折性。
如图5所示，本实施例还提供一种显示面板的制备方法，包括步骤S1~S2。
S1 面板提供步骤，提供一面板，所述面板包括首尾相接的第一侧边第三侧边、第二侧边及第四侧边，所述第四侧边处连接有覆晶薄膜及柔性线路板。
所述面板为异形结构，在其任一侧边处均设有一突出部，其中，所述第一侧边处的第一突出部的长度与所述第一侧边的长度相同，所述第二侧边处的第二突出部的长度与所述第二侧边的长度相同，所述第三侧边处的第三突出部的长度与所述第三侧边的长度相同，所述第四侧边处的第四突出部的长度与所述第四侧边的长度相同。
所述面板提供步骤还包括开槽步骤，在所述开槽步骤中，在所述面板的第一突出部开设第一凹槽，在所述第二突出部上开设第二凹槽，所述第一凹槽的形状可为规律排列的矩形、梯形、三角形或不规律排列矩形中的任一种，所述第二凹槽的形状可为规律排列的矩形、梯形、三角形或不规律排列矩形中的任一种。
S2 弯折步骤，弯折所述突出部，形成弯折区。
如图6所示，所述弯折步骤包括步骤S21~S24。
S21 第一弯折步骤，弯折所述面板的第一突出部，使其被固定至所述面板的背部，形成第一弯折部。
S22 第二弯折步骤，弯折所述面板的第二突出部，使其被固定至所述面板的背部，形成第二弯折部。
S23 第三弯折步骤，弯折所述面板的第三突出部，使其被固定至所述面板的背部，形成第三弯折部。
S24 第四弯折步骤，弯折所述面板的第四突出部，使其被固定至所述面板的背部，形成第四弯折部，同时，设于所述第四弯折部上的覆晶薄膜与柔性线路板也被弯折至所述面板的背面。此时，未被弯折的面板即为显示区，用以正常显示。
可通过调节显示装置的像素驱动电流至零，使得任一弯折部在所述背面显示为黑色，相当于不显示。
可在所述显示区的上方覆盖一层盖板（cover window），所述盖板无需印刷油墨，用以提高显示装置的整体强度，使得显示面板更易粘合至显示装置的其他部件，所述盖板不存在现有技术中的可视区（VA区），使得显示装置的正面无边框，在视觉上形成无边框的效果，提高显示装置的屏占比，可进一步提高用户的视觉体验。
本实施例所述显示面板的制备方法的技术效果在于，将显示区部分地弯折至背面，使得显示装置的正面均为有效显示区，实现无边框的视觉效果。在部分弯折部上开槽，可在弯折部弯折时缓解应力，提升显示装置的可弯折性。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (10)

  1. 一种显示面板，其包括：
    显示区；
    弯折区，连接至所述显示区的任一侧边，且被弯折至所述显示区的背面；以及
    覆晶薄膜，连接至弯折区。
  2. 如权利要求1所述的显示面板，其中，
    所述显示区包括：
    相互平行的第一侧边及第二侧边；以及
    相互平行的第三侧边及第四侧边。
  3. 如权利要求2所述的显示面板，其中，
    所述弯折区包括：
    第一弯折部，在所述第一侧边处被弯折至所述显示区的背面；
    第二弯折部，在所述第二侧边处被弯折至所述显示区的背面；
    第三弯折部，在所述第三侧边处被弯折至所述显示区的背面；以及
    第四弯折部，在所述第四侧边处被弯折至所述显示区的背面。
  4. 如权利要求3所述的显示面板，其中，
    所述覆晶薄膜连接至所述弯折区的第四弯折部。
  5. 如权利要求3所述的显示面板，其中，
    所述第一弯折部设有第一凹槽；和/或，
    所述第二弯折部设有第二凹槽。
  6. 如权利要求4所述的显示面板，其中，
    所述第一凹槽的形状包括梯形、三角形或矩形中的任一种；和/或，
    所述第二凹槽的形状包括梯形、三角形或矩形中的任一种。
  7. 一种显示装置，包括如权利要求1所述的显示面板。
  8. 一种显示面板的制备方法，其包括以下步骤：
    面板提供步骤，提供一面板；以及
    弯折步骤，将所述面板的侧边弯折至所述面板的背面。
  9. 如权利要求8所述的显示面板的制备方法，其中，
    所述弯折步骤包括以下步骤：
    第一弯折步骤，将所述面板的第一侧边弯折至所述面板的背面；
    第二弯折步骤，将所述面板的第二侧边弯折至所述面板的背面；
    第三弯折步骤，将所述面板的第三侧边弯折至所述面板的背面；以及
    第四弯折步骤，将所述面板的第四侧边弯折至所述面板的背面。
  10. 如权利要求8所述的显示面板的制备方法，其中，
    所述面板提供步骤包括
    开槽步骤，在所述面板的第一侧边及第三侧边进行开槽处理。
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