WO2022087986A1 - 柔性电路板和显示装置 - Google Patents

柔性电路板和显示装置 Download PDF

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Publication number
WO2022087986A1
WO2022087986A1 PCT/CN2020/124946 CN2020124946W WO2022087986A1 WO 2022087986 A1 WO2022087986 A1 WO 2022087986A1 CN 2020124946 W CN2020124946 W CN 2020124946W WO 2022087986 A1 WO2022087986 A1 WO 2022087986A1
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WO
WIPO (PCT)
Prior art keywords
straight line
circuit board
flexible circuit
via hole
conductive lines
Prior art date
Application number
PCT/CN2020/124946
Other languages
English (en)
French (fr)
Inventor
郑美珠
李园园
Original Assignee
京东方科技集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to PCT/CN2020/124946 priority Critical patent/WO2022087986A1/zh
Priority to US17/599,449 priority patent/US11899498B2/en
Priority to CN202080002575.0A priority patent/CN114698417A/zh
Publication of WO2022087986A1 publication Critical patent/WO2022087986A1/zh

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Classifications

    • 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
    • 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
    • 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
    • G06F1/18—Packaging or power distribution
    • G06F1/183—Internal mounting support structures, e.g. for printed circuit boards, internal connecting means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/03—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes specially adapted for displays having non-planar surfaces, e.g. curved displays
    • G09G3/035—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes specially adapted for displays having non-planar surfaces, e.g. curved displays for flexible display surfaces
    • 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
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
    • 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
    • H05K1/11—Printed elements for providing electric connections to or between printed circuits
    • H05K1/115—Via connections; Lands around holes or via connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2380/00—Specific applications
    • G09G2380/02—Flexible displays
    • 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
    • H05K1/181—Printed circuits structurally associated with non-printed electric components associated with surface mounted components
    • 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
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/095—Conductive through-holes or vias
    • H05K2201/09636—Details of adjacent, not connected vias
    • 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
    • H05K2201/10136—Liquid Crystal display [LCD]

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a flexible circuit board and a display device.
  • Flexible Printed Circuit is a highly reliable and excellent flexible printed circuit board made of polyimide or polyester film. With the characteristics of light weight and thin thickness, it is mainly used in many products such as mobile phones, notebook computers, PDAs, and digital cameras.
  • a flexible circuit board in one aspect, includes an insulating base material, the insulating base material includes a main body part and at least one first extension part connected to the edge of the main body part; A hole area, a bending area and a binding area; the via area is provided with a plurality of via holes, the plurality of via holes include at least one first via hole and at least one second via hole, wherein the first via hole is The center of the orthographic projection on the reference plane parallel to the via area falls on a first straight line parallel to the bending axis of the bending area, and the center of the orthographic projection of the second via on the reference plane is not falls on the first straight line.
  • a straight line where an orthographic center of the first via hole on the reference plane and an orthographic projection center of the second via hole on the reference plane are located is a second straight line, and the first The included angle between the two straight lines and the first straight line is ⁇ , where 15° ⁇ 90°.
  • a straight line where an orthographic center of the first via hole on the reference plane and an orthographic projection center of the second via hole on the reference plane are located is a second straight line, and the first The included angle between the two straight lines and the first straight line is ⁇ , where 0° ⁇ 15°, and the first via hole and the second via hole are parallel to the first straight line
  • the spacing in the direction is greater than or equal to 1mm.
  • the distance between the first via hole and the second via hole in a direction parallel to the first straight line is 1 mm ⁇ 2 mm; and/or, two adjacent first via holes The spacing between vias is greater than or equal to 2mm.
  • the orthographic projection centers of any two via holes in the plurality of via holes on the reference plane do not fall on the same line parallel to the bending axis of the bending region.
  • the plurality of vias are sequentially divided into at least two parts of vias along a direction parallel to the first straight line, and among the two adjacent parts of vias, a part of the vias is parallel to the first line.
  • the direction of the first straight line is gradually away from the bending area, and another part of the via hole is gradually approached to the bending area along the direction parallel to the first straight line.
  • the flexible circuit board further includes: a first conductive layer disposed on the first side surface of the insulating substrate, the first conductive layer including a plurality of first pins and a plurality of first Conductive wires, the plurality of first pins are located in the binding area, and the first ends of the plurality of first conductive wires are in one-to-one correspondence with at least part of the first pins of the plurality of first pins connection; a second conductive layer disposed on the second side surface of the insulating base material, the second conductive layer includes a plurality of second conductive lines, and the first ends of the plurality of second conductive lines pass through the plurality of second conductive lines The via holes are connected to the second ends of the plurality of first conductive lines in a one-to-one correspondence.
  • the number of the first extension parts is two; a part of the first pins of the plurality of first pins are located in a binding area of one of the first extension parts, and the plurality of first pins are located in a binding area of the first extension part.
  • the other part of the first pins is located in the binding area of the other first extension part; the first ends of a part of the first conductive lines of the plurality of first conductive lines are connected with the first pins of the part of the first pins.
  • At least some of the first pins are connected in a one-to-one correspondence, and the first end of another part of the first conductive lines in the plurality of first conductive lines is one with at least part of the first pins in the other part of the first pins.
  • the first end of another part of the second conductive lines of the plurality of second conductive lines is connected to the second conductive line of the part of the first conductive lines through a plurality of via holes on the other first extension part
  • the terminals are connected one by one.
  • both of the first extension portions are connected to the first side edge of the body portion.
  • the insulating substrate further comprises: a second extension connected to the second side edge of the main body portion, the first side edge and the second side edge are located on opposite sides of the main body portion the side; the plug-in structure is arranged at one end of the second extension part away from the main body part.
  • the flexible circuit board further includes: a first insulating layer, located on a side of the first conductive layer away from the insulating substrate; a second insulating layer, located on a side of the second conductive layer away from the insulating substrate; one side of the insulating substrate; a first shielding layer, located on the side of the first insulating layer away from the insulating substrate, the first shielding layer covers the main body part and the via area; a second shielding layer a shielding layer, located on the side of the second insulating layer away from the insulating base material, the first shielding layer covers the main body part and the via area; the first shielding layer and the second shielding layer Layers are used to shield electromagnetic waves.
  • the flexible circuit board further includes: a protective layer disposed on a side of the second shielding layer away from the insulating substrate, and the protective layer covers the via area.
  • a display device in another aspect, includes: the flexible circuit board according to any one of the above-mentioned embodiments; and a display panel, on which a binding area of the flexible circuit board is bound.
  • the display device is a foldable display device.
  • the display device further includes: a support portion disposed between the main body portion of the flexible circuit board and the display panel.
  • FIG. 1 is a structural diagram of a flexible circuit board according to some embodiments
  • FIG. 2 is a via distribution diagram according to some embodiments.
  • FIG. 3 is another via distribution diagram according to some embodiments.
  • FIG. 4 is yet another via distribution diagram according to some embodiments.
  • FIG. 5A is yet another via distribution diagram according to some embodiments.
  • FIG. 5B is yet another via distribution diagram according to some embodiments.
  • FIG. 5C is yet another via distribution diagram according to some embodiments.
  • FIG. 6 is yet another via distribution diagram according to some embodiments.
  • FIG. 7 is a cross-sectional view of the flexible circuit board shown in FIG. 1 at XX';
  • FIG. 8 is a structural diagram of another flexible circuit board according to some embodiments.
  • FIG. 9 is a structural diagram of yet another flexible circuit board according to some embodiments.
  • FIG. 10 is a structural diagram of a display device according to some embodiments.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as “first” or “second” may expressly or implicitly include one or more of that feature.
  • plural means two or more.
  • the expressions “coupled” and “connected” and their derivatives may be used.
  • the term “connected” may be used in describing some embodiments to indicate that two or more components are in direct physical or electrical contact with each other.
  • the term “coupled” may be used in describing some embodiments to indicate that two or more components are in direct physical or electrical contact.
  • the terms “coupled” or “communicatively coupled” may also mean that two or more components are not in direct contact with each other, yet still co-operate or interact with each other.
  • the embodiments disclosed herein are not necessarily limited by the content herein.
  • a and/or B includes the following three combinations: A only, B only, and a combination of A and B.
  • Exemplary embodiments are described herein with reference to cross-sectional and/or plan views that are idealized exemplary drawings.
  • the thickness of layers and regions are exaggerated for clarity. Accordingly, variations from the shapes of the drawings due to, for example, manufacturing techniques and/or tolerances, are contemplated.
  • example embodiments should not be construed as limited to the shapes of the regions shown herein, but to include deviations in shapes due, for example, to manufacturing. For example, an etched area shown as a rectangle will typically have curved features.
  • the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of example embodiments.
  • the flexible circuit board 100 includes an insulating base material 1 , and the insulating base material 1 includes a main body portion 11 and at least one first extension portion 12 connected to an edge of the main body portion 11 .
  • the first extension part 12 includes a via area 121 , a bending area 122 and a binding area 123 which are separated from the main body part 11 in sequence.
  • the via area 121 is provided with a plurality of via holes 2 , and the plurality of via holes 2 include at least one first via hole 21 and at least one second via hole 22 , wherein the first via hole 21 is parallel to the via hole area 121 .
  • the center of the orthographic projection on the reference plane S falls on the first straight line W parallel to the bending axis L of the bending region 122, and the orthographic center of the second via hole 22 on the reference plane S does not fall on the first straight line W above.
  • the first straight line W is a virtual reference straight line, for example, among all straight lines parallel to the bending axis L of the bending region 122 and overlapping with the center of the orthographic projection of any via hole on the reference plane S, any A straight line can be used as the first straight line W.
  • the via hole 2 whose orthographic projection center falls on the first straight line W is the first via hole 21, and the number of the first via hole 21 can be one or more; and the orthographic projection center does not fall on the first straight line W
  • the via hole 2 on the line W is the second via hole 22 , and the number of the second via hole 22 may also be one or more.
  • the plurality of via holes 2 on the via hole area 121 include both the first via hole 21 whose orthographic projection center falls on the first straight line W, and the orthographic projection center that does not fall on the first straight line W
  • the second via hole 22 is formed, so that when the via hole region 121 is displaced by the pulling force generated by the bending region 122, the via hole region 121 is not prone to breakage, which is beneficial to improve the bending of the entire flexible circuit board 100. performance.
  • the main body part 11 of the flexible circuit board 100 can be used for placing chips 15 and other electronic components.
  • the chip 15 placed on the main body part 11 can be a touch control chip, or the main body part 11 can be a touch control chip.
  • the chip 15 can also be a drive control chip.
  • the binding area 123 in the first extension part 12 of the flexible circuit board 100 can be provided with pins, so that the chip 15 in the flexible circuit board (for example, located in the main body) is bound to the display panel through the binding area 123
  • the touch control chip or drive control chip of part 11) can be connected to the circuit in the display panel through the pins located in the binding area 123, so that the circuit in the display panel (such as pixel A drive circuit, or a touch control circuit) is controlled to realize the display function and/or the touch function of the display device.
  • the straight line where the center of the orthographic projection of the first via hole 21 on the reference plane S and the center of the orthographic projection of the second via hole 22 on the reference plane S is the second straight line V
  • the second The included angle between the straight line V and the first straight line W is ⁇ , where 15° ⁇ 90°.
  • the center of the orthographic projection of the first via hole 21 on the reference plane S and the center of the orthographic projection of the second via hole 22 on the reference plane S are perpendicular to the first
  • the distance in the direction of the line W is farther, so that the via area is less likely to be broken when a misalignment occurs, which further improves the bending performance of the flexible circuit board.
  • the distance between the first via hole 21 and the second via hole 22 there is no need to limit the distance between the first via hole 21 and the second via hole 22 , that is, as long as the first via hole 21 and the second via hole 22 are not in communication Can. Therefore, the distance between the first via hole 21 and the second via hole 22 in a direction parallel to the first straight line W can be set narrower, thereby helping to provide a greater number of via holes 2 in the via hole region 121 .
  • the straight line between the orthographic center of the first via hole 21 on the reference plane S and the orthographic center of the second via hole 22 on the reference plane S is the second straight line V
  • the first The included angle between the two straight lines V and the first straight line W is ⁇ , where 0° ⁇ 15°, and the first via hole 21 and the second via hole 22 are in a direction parallel to the first straight line W
  • the spacing d1 is greater than or equal to 1mm.
  • the included angle between the first straight line W and the second straight line V is small (for example, 0° ⁇ 15°), which helps to reduce the via area along the direction perpendicular to the first straight line W. width.
  • the distance d1 between the first via hole 21 and the second via hole 22 in the direction parallel to the first straight line W is greater than or equal to 1 mm, the included angle between the first straight line W and the second straight line V is also made When it is smaller, the distance between the first via hole 21 and the second via hole 22 in the direction parallel to the first straight line W is relatively large, so that when the via area is dislocated due to the pulling force generated by the bending area Not easy to break.
  • the distance d1 between the first via hole 21 and the second via hole 22 in a direction parallel to the first straight line W may be 1 mm ⁇ 2 mm.
  • the distance d1 is equal to or close to 1 mm, it is helpful to arrange a greater number of vias 2 in the area parallel to the vias.
  • the distance is equal to or close to 2 mm, it is helpful to improve the anti-fracture effect of the via area.
  • the distance d2 between two adjacent first via holes 21 is greater than or equal to 2 mm.
  • the distance d2 between the two adjacent first via holes 21 is larger, that is, the area of the connecting portion between the adjacent two adjacent via holes 2 is larger.
  • the center of the orthographic projection of any first via hole 21 on the reference plane S and the center of the orthographic projection of any second via hole 22 on the reference plane S can be located on the same line. on the second straight line V. For example, as shown in FIG.
  • the center of the orthographic projection of the first via hole 21a on the reference plane S may fall on a second straight line V1 with the center of the orthographic projection of the second via hole 22a on the reference plane S, or
  • the center of the orthographic projection of the first via hole 21a on the reference plane and the center of the orthographic projection of the second via hole 22b on the reference plane S may lie on a second straight line V2,
  • the center of the orthographic projection on the surface may fall on a second straight line V3 with the center of the orthographic projection of the first via hole 21b on the reference surface S.
  • the orthographic projection centers of any two via holes 2 of the plurality of via holes 2 on the reference plane S do not fall on the same line parallel to the bending axis of the bending region superior. That is, when the center of the orthographic projection of one via hole 2 on the reference plane S falls on the first straight line W parallel to the bending axis of the bending region, the orthographic projections of the remaining via holes 2 on the reference plane S are all the same. will not fall on the first straight line W.
  • the first via hole 21 may be any one via hole 2 in the plurality of via holes 2 , and the remaining via holes 2 are all second via holes 22 .
  • the via area is subjected to the tensile force generated by the bending area, only one via hole appears at intervals in the direction perpendicular to the first straight line, so that the bending area is not easily broken, thereby further improving the flexible circuit board. bending properties.
  • FIG. 5A to FIG. 5C only illustrate that in the present disclosure “the orthographic center of any two via holes 2 of the plurality of via holes 2 on the reference plane S does not fall parallel to the bending axis of the bending area.
  • the three possible cases of "on the same straight line", the present disclosure is not limited to the scheme shown in FIGS. 5A-5C.
  • the plurality of via holes 2 are sequentially divided into at least two parts along a direction parallel to the first straight line W (eg, the direction from left to right in FIG. 6 ).
  • the bending area is formed, and another part of the via holes (for example, the fifth to seventh via holes from left to right in FIG. 6 ) gradually approaches the bending area along the direction parallel to the first straight line.
  • the flexible circuit board 100 further includes a first conductive layer 3 disposed on the first side surface of the insulating substrate 1 , and the first conductive layer 3 includes a plurality of first leads
  • the pins 31 and the plurality of first conductive lines 32, the plurality of first pins 31 are located in the binding area 123, and the first ends of the plurality of first conductive lines 32 are connected to at least part of the first pins of the plurality of first pins 31.
  • the pins 31 are connected in one-to-one correspondence.
  • the second ends of the plurality of first conductive wires 32 are connected in a one-to-one correspondence.
  • the second ends of the plurality of second conductive lines 41 may be directly or indirectly connected to the above-mentioned chip 15 (eg, a touch control chip or a drive control chip).
  • the first conductive layer 3 may further include a third conductive line 33 connected to the chip 15 located in the main body part 11 , and the second end of the second conductive line 41 may pass through the chip located in the main body part 11 .
  • the via hole is connected with the third conductive line 33 .
  • the second end of the second conductive wire 41 may also be directly connected to the chip 15 through the via hole located at the main body portion 11 where the chip 15 is mounted.
  • the number of the first extension portion 12 in the above-mentioned flexible circuit board 100 may be one or more.
  • the number of the first extension parts 12 may be two.
  • a part of the first pins 31 of the plurality of first pins 31 is located in the binding area 123 of one first extension part 12
  • another part of the plurality of first pins 31 is located in the other first extension part 12 Binding area 123.
  • the first ends of a part of the first conductive lines 32 of the plurality of first conductive lines 32 are connected to at least part of the first pins 31 of a part of the first pins 31 in a one-to-one correspondence, and another part of the plurality of first conductive lines 32 is connected in a one-to-one correspondence.
  • the first ends of a part of the first conductive wires 32 are connected to at least part of the first pins 31 of the other part of the first pins 31 in a one-to-one correspondence.
  • the first ends of a part of the second conductive lines 41 of the plurality of second conductive lines 41 are connected to the second ends of a part of the first conductive lines 32 in a one-to-one correspondence through a plurality of via holes 2 on a first extension part 12, and many
  • the first ends of another part of the second conductive lines 41 of the second conductive lines 41 are connected to the second ends of the other part of the first conductive lines 32 in a one-to-one correspondence through a plurality of vias 2 on the other first extension part 12 .
  • the first conductive layer 3 further includes a plurality of fourth conductive lines 34 and a plurality of fifth conductive lines 35 .
  • a plurality of fourth conductive lines 34 may be connected between the chip 15 and the first conductive lines 32 .
  • the first ends of the plurality of fifth conductive lines 35 may be connected to the second ends of a part of the second conductive lines 41 of the plurality of second conductive lines 41 through the via holes located in the main body portion 11 , and the plurality of fifth conductive lines The second end of 35 may be connected to the second end of another part of the second conductive lines 41 in the above-mentioned plurality of second conductive lines 41 through the via hole located in the main body part 11 .
  • the output terminals of the chip 15 can be connected to the first pins 31 on the two first extension parts 12 at the same time.
  • both of the first extension portions 12 are connected to the first side edge of the main body portion 11 .
  • the flexible circuit board 100 includes two first extending portions 12 , and the circuits on the flexible circuit board 100 can be electrically connected to the circuits on the display panel through the two first extending portions 12 .
  • the main body part 11 is provided with a touch control chip (eg, the chip 15 ).
  • the output end of the touch control chip can pass through the two first extension parts 12 .
  • the plurality of first pins 31 are connected to the touch electrodes in the display panel at the same time, that is, the touch control chip can be connected to the touch electrodes through two parts of conductive wires at the same time, thereby helping to reduce the contact between the touch control chip and the touch control chip.
  • the resistance between the touch electrodes improves the control precision of the touch control circuit in the display device.
  • the flexible circuit board 100 further includes a second extension part 13 and a plug-in structure 14 , wherein the second extension part 13 is connected with the second side edge of the main body part 11 , and the first The one side edge and the second side edge are located on opposite sides of the main body portion 11 .
  • the plug-in structure 14 is disposed at one end of the second extension portion 13 away from the main body portion 11 . Wherein, the plug-in structure 14 is plugged in, for example, a main control circuit board of a display device.
  • the flexible circuit board 100 further includes a first insulating layer 5 , a second insulating layer 6 , a first shielding layer 7 and a second shielding layer 8 .
  • the first insulating layer 5 is located on the side of the first conductive layer 3 away from the insulating substrate 1 .
  • the second insulating layer 6 is located on the side of the second conductive layer 4 away from the insulating substrate 1 .
  • the first shielding layer 7 is located on the side of the first insulating layer 5 away from the insulating substrate 1 , and the first shielding layer 7 covers the main body portion 11 and the via area 121 .
  • the second shielding layer 8 is located on the side of the second insulating layer 6 away from the insulating substrate 1 , and the second shielding layer 8 covers the main body portion 11 and the via area 121 .
  • the first shielding layer 7 and the second shielding layer 8 can shield electromagnetic waves, so as to prevent the electrical signals transmitted by the conductive wires on the flexible circuit board from being affected.
  • the flexible circuit board 100 further includes a protective layer 9 , the protective layer 9 is disposed on the side of the second shielding layer 8 away from the insulating substrate 1 , and the protective layer 9 covers Aperture area 121 .
  • the protective layer 9 is used to protect the via area 121 and prevent the via area 121 from being broken when subjected to tensile force.
  • Some embodiments of the present disclosure further provide a display device 300.
  • the display device 300 includes the flexible circuit board 100 and the display panel 200 described in any of the above embodiments of the present disclosure.
  • the binding area 123 is bound on the display panel 200 .
  • the display device 300 may be a foldable display device, and the bending axis of the foldable display device is substantially parallel to the bending axis of the bending region in the flexible circuit board 100 .
  • substantially parallel means that the two are parallel to each other, or, that the two are approximately parallel (for example, the included angle between the orthographic projections of the two in the above-mentioned reference plane is less than or equal to 10 degrees).
  • the display panel is also bent under a force, which will cause the flexible circuit board bound to it to move erratically.
  • the via area will be affected by the pulling force generated by the bending area.
  • the orthographic projection centers of the multiple vias set in the via area on the reference plane all fall on the bending area If the bending axes of the folding area are parallel to the same straight line, it is easy to cause the via area to be easily broken, which may damage the flexible circuit board, thereby causing the display device to fail to achieve touch and/or display functions.
  • the plurality of via holes 2 on the via hole region 121 include both the first via hole 21 whose orthographic projection center falls on the first straight line W, and the orthographic projection center.
  • the second via hole 22 that does not fall on the first straight line W makes it difficult for the via hole region 121 to break when the via hole region 121 is displaced by the pulling force generated by the bending region 122, and the entire flexibility
  • the circuit board 100 has strong bending performance. Therefore, the foldable display device using the flexible circuit board provided in the above embodiments of the present disclosure has higher reliability and longer service life.
  • the display device 300 further includes a support portion 301 , and the support portion 301 is disposed between the main body portion of the flexible circuit board 100 and the display panel 200 .
  • the support portion 301 can support the main body portion 11 of the flexible circuit board 100 , so that the main body portion 11 is not easily shaken even if the chip 15 or other electronic devices are installed, which helps to improve the service life of the flexible circuit board.
  • the above-mentioned display device 300 may be, for example, any component with a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, and a navigator.
  • a display function such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, and a navigator.

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Abstract

一种柔性电路板，包括绝缘基材，所述绝缘基材包括主体部分和与所述主体部分的边缘相连的至少一个第一延伸部分；所述第一延伸部分包括依次远离所述主体部分的过孔区域、弯折区域和绑定区域；所述过孔区域设置有多个过孔，所述多个过孔包括至少一个第一过孔和至少一个第二过孔，其中，第一过孔在平行于所述过孔区域的参考面上的正投影中心落在与所述弯折区域的弯曲轴线平行的第一直线上，第二过孔在所述参考面上的正投影中心不落在所述第一直线上。

Description

柔性电路板和显示装置 技术领域
本公开涉及显示技术领域，尤其涉及一种柔性电路板和显示装置。
背景技术
柔性电路板(Flexible Printed Circuit，简称FPC)是以聚酰亚胺或聚酯薄膜为基材制成的一种具有高度可靠性，绝佳的可挠性印刷电路板，具有配线密度高、重量轻、厚度薄的特点，主要使用在手机、笔记本电脑、PDA、数码相机等很多产品中。
发明内容
一方面，提供一种柔性电路板。所述柔性电路板包括绝缘基材，所述绝缘基材包括主体部分和与所述主体部分的边缘相连的至少一个第一延伸部分；所述第一延伸部分包括依次远离所述主体部分的过孔区域、弯折区域和绑定区域；所述过孔区域设置有多个过孔，所述多个过孔包括至少一个第一过孔和至少一个第二过孔，其中，第一过孔在平行于所述过孔区域的参考面上的正投影中心落在与所述弯折区域的弯曲轴线平行的第一直线上，第二过孔在所述参考面上的正投影中心不落在所述第一直线上。
在一些实施例中，所述第一过孔在所述参考面上的正投影中心和所述第二过孔在所述参考面上的正投影中心所在的直线为第二直线，所述第二直线与所述第一直线之间的夹角为α，其中，15°＜α≤90°。
在一些实施例中，所述第一过孔在所述参考面上的正投影中心和所述第二过孔在所述参考面上的正投影中心所在的直线为第二直线，所述第二直线与所述第一直线之间的夹角为α，其中，0°＜α≤15°，并且所述第一过孔和所述第二过孔在平行于所述第一直线的方向上的间距大于或等于1mm。
在一些实施例中，所述第一过孔与所述第二过孔在平行于所述第一直线的方向上的间距为1mm～2mm；和/或，相邻的两个所述第一过孔之间的间距大于或等于2mm。
在一些实施例中，所述多个过孔中任意两个过孔在所述参考面上的正投影中心不落在与所述弯折区域的弯曲轴线平行的同一直线上。
在一些实施例中，所述多个过孔沿平行于所述第一直线的方向依次分为至少两部分过孔，且相邻的两部分过孔中，一部分过孔沿平行于所述第一直线的方向逐渐远离所述弯折区域，另一部分过孔沿平行于所述第一直线的方向逐渐靠近所述弯折区域。
在一些实施例中，所述柔性电路板还包括：设置在所述绝缘基材第一侧表面上的第一导电层，所述第一导电层包括多个第一引脚和多条第一导电线，所述多个第一引脚位于所述绑定区域，所述多条第一导电线的第一端与所述多个第一引脚中的至少部分第一引脚一一对应连接；设置在所述绝缘基材第二侧表面上的第二导电层，所述第二导电层包括多条第二导电线，所述多条第二导电线的第一端通过所述多个过孔与所述多条第一导电线的第二端一一对应连接。
在一些实施例中，所述第一延伸部分的数量为两个；所述多个第一引脚中的一部分第一引脚位于一个所述第一延伸部分的绑定区域，所述多个第一引脚中的另一部分位于另一个所述第一延伸部分的绑定区域；所述多条第一导电线中的一部分第一导电线的第一端与所述一部分第一引脚中的至少部分第一引脚一一对应连接，所述多条第一导电线中的另一部分第一导电线的第一端与所述另一部分第一引脚中的至少部分第一引脚一一对应连接；所述多条第二导电线中的一部分第二导电线的第一端通过一个所述第一延伸部分上的多个过孔与所述一部分第一导电线的第二端一一对应连接，所述多条第二导电线中的另一部分第二导电线的第一端通过另一个所述第一延伸部分上的多个过孔与所述一部分第一导电线的第二端一一对应连接。
在一些实施例中，两个所述第一延伸部分均与所述主体部分的第一侧边缘相连。
在一些实施例中，所述绝缘基材还包括：第二延伸部，与所述主体部分的第二侧边缘相连，所述第一侧边缘和第二侧边缘位于所述主体部分的相对两侧；插接结构，设置于所述第二延伸部远离所述主体部分的一端。
在一些实施例中，所述柔性电路板还包括：第一绝缘层，位于所述第一导电层远离所述绝缘基材的一侧；第二绝缘层，位于所述第二导电层远离所述绝缘基材的一侧；第一屏蔽层，位于所述第一绝缘层远离所述绝缘基材的一侧，所述第一屏蔽层覆盖所述主体部分和所述过孔区域；第二屏蔽层，位于所述第二绝缘层远离所述绝缘基材的一侧，所述第一屏蔽层覆盖所述主体部分和所述过孔区域；所述第一屏蔽层和所述第二屏蔽层用于屏蔽电磁波。
在一些实施例中，所述柔性电路板，还包括：保护层，设置于所述第二屏蔽层远离所述绝缘基材的一侧，所述保护层覆盖于所述过孔区域。
另一方面，提供一种显示装置。所述显示装置包括：如上述任一实施例所述的柔性电路板；显示面板，所述柔性电路板的绑定区域绑定在所述显示面板上。
在一些实施例中，所述显示装置为可折叠式显示装置。
在一些实施例中，所述显示装置还包括：支撑部，设置于所述柔性电路板的主体部分与所述显示面板之间。
附图说明
为了更清楚地说明本公开中的技术方案，下面将对本公开一些实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例的附图，对于本领域普通技术人员来讲，还可以根据这些附图获得其他的附图。此外，以下描述中的附图可以视作示意图，并非对本公开实施例所涉及的产品的实际尺寸、方法的实际流程、信号的实际时序等的限制。
图1为根据一些实施例的一种柔性电路板的结构图；
图2为根据一些实施例的一种过孔分布图；
图3为根据一些实施例的另一种过孔分布图；
图4为根据一些实施例的再一种过孔分布图；
图5A为根据一些实施例的又一种过孔分布图；
图5B为根据一些实施例的又一种过孔分布图；
图5C为根据一些实施例的又一种过孔分布图；
图6为根据一些实施例的又一种过孔分布图；
图7为图1所示的柔性电路板在X-X'的截面图；
图8为根据一些实施例的另一种柔性电路板的结构图；
图9为根据一些实施例的再一种柔性电路板的结构图；
图10为根据一些实施例的一种显示装置的结构图。
具体实施方式
下面将结合附图，对本公开一些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公开一部分实施例，而不是全部的实施例。基于本公开所提供的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本公开保护的范围。
除非上下文另有要求，否则，在整个说明书和权利要求书中，术语“包括(comprise)”及其其他形式例如第三人称单数形式“包括(comprises)”和现在分词形式“包括(comprising)”被解释为开放、包含的意思，即为“包含，但不限于”。在说明书的描述中，术语“一个实施例(one embodiment)”、“一些实施例(some embodiments)”、“示例性实施例(exemplary embodiments)”、“示例(example)”、“特定示例(specific example)” 或“一些示例(some examples)”等旨在表明与该实施例或示例相关的特定特征、结构、材料或特性包括在本公开的至少一个实施例或示例中。上述术语的示意性表示不一定是指同一实施例或示例。此外，所述的特定特征、结构、材料或特点可以以任何适当方式包括在任何一个或多个实施例或示例中。
以下，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本公开实施例的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在描述一些实施例时，可能使用了“耦接”和“连接”及其衍伸的表达。例如，描述一些实施例时可能使用了术语“连接”以表明两个或两个以上部件彼此间有直接物理接触或电接触。又如，描述一些实施例时可能使用了术语“耦接”以表明两个或两个以上部件有直接物理接触或电接触。然而，术语“耦接”或“通信耦合(communicatively coupled)”也可能指两个或两个以上部件彼此间并无直接接触，但仍彼此协作或相互作用。这里所公开的实施例并不必然限制于本文内容。
“A和/或B”，包括以下三种组合：仅A，仅B，及A和B的组合。
本文中“适用于”或“被配置为”的使用意味着开放和包容性的语言，其不排除适用于或被配置为执行额外任务或步骤的设备。
另外，“基于”的使用意味着开放和包容性，因为“基于”一个或多个所述条件或值的过程、步骤、计算或其他动作在实践中可以基于额外条件或超出所述的值。
如本文所使用的那样，“约”或“近似”包括所阐述的值以及处于特定值的可接受偏差范围内的平均值，其中所述可接受偏差范围如由本领域普通技术人员考虑到正在讨论的测量以及与特定量的测量相关的误差(即，测量系统的局限性)所确定。
本文参照作为理想化示例性附图的剖视图和/或平面图描述了示例性实施方式。在附图中，为了清楚，放大了层和区域的厚度。因此，可设想到由于例如制造技术和/或公差引起的相对于附图的形状的变动。因此，示例性实施方式不应解释为局限于本文示出的区域的形状，而是包括因例如制造而引起的形状偏差。例如，示为矩形的蚀刻区域通常将具有弯曲的特征。因此，附图中所示的区域本质上是示意性的，且它们的形状并非旨在示出设备的区域的实际形状，并且并非旨在限制示例性实施方式的范围。
本公开的一些实施例提供了一种柔性电路板100。如图1所示，该柔性电 路板100包括绝缘基材1，绝缘基材1包括主体部分11和与主体部分11的边缘相连的至少一个第一延伸部分12。第一延伸部分12包括依次远离主体部分11的过孔区域121、弯折区域122和绑定区域123。过孔区域121设置有多个过孔2，所述多个过孔2包括至少一个第一过孔21和至少一个第二过孔22，其中，第一过孔21在平行于过孔区域121的参考面S上的正投影中心落在与弯折区域122的弯曲轴线L平行的第一直线W上，第二过孔22在参考面S上的正投影中心不落在第一直线W上。
其中，第一直线W为虚拟设定的参考直线，例如，在与弯折区域122的弯曲轴线L平行且与任一过孔在参考面S上的正投影中心重叠的所有直线中，任意一条直线都可以作为第一直线W。此时，正投影中心落在第一直线W上的过孔2即为第一过孔21，第一过孔21的数量可以是一个或多个；而正投影中心未落在第一直线W上的过孔2即为第二过孔22，第二过孔22的数量也可以是一个或多个。
由于该过孔区域121上的多个过孔2中，既包括正投影中心落在第一直线W上的第一过孔21，又包括正投影中心不落在该第一直线W上的第二过孔22，使得在该过孔区域121受到弯折区域122产生的拉力而发生错动时，该过孔区域121不容易发生断裂，从而有利于提高整个柔性电路板100的弯折性能。
其中，参见图1，柔性电路板100的主体部分11可以用于放置芯片15和其他电子元器件，示例性的，主体部分11上放置的芯片15可以是触摸控制芯片，或者主体部分11上放置的芯片15还可以是驱动控制芯片。
需要说明的是，柔性电路板100的第一延伸部分12中的绑定区域123可以设置引脚，这样，通过绑定区域123与显示面板绑定，柔性电路板中的芯片15(例如位于主体部分11的触摸控制芯片或驱动控制芯片)可以通过位于绑定区域123的引脚与显示面板中的电路相连接，从而可以通过柔性电路板100中的芯片15对显示面板中的电路(例如像素驱动电路，或触控电路)进行控制，实现显示装置的显示功能和/或触控功能。
由于第一过孔21在参考面S上的正投影的中心位于第一直线W上，而第二过孔22在参考面S上的正投影的中心不位于第一直线W上，因此，任意一个第一过孔21在参考面S上的正投影的中心与任意一个第二过孔22在参考面S上的正投影的中心所在的直线与第一直线W之间可以存在0°～90°的夹角。
示例性的，如图2所示，第一过孔21在参考面S上的正投影中心和第二 过孔22在参考面S上的正投影中心所在的直线为第二直线V，第二直线V与第一直线W之间的夹角为α，其中，15°＜α≤90°。
这样设置，相较于α≤15°而言，第一过孔21在参考面S上的正投影的中心与第二过孔22在参考面S上的正投影的中心在垂直于第一直线W的方向上的距离较远，从而使得过孔区域在发生错动时更不容易断裂，进一步改善了柔性电路板的弯折性能。
值得指出的是，在该示例中，不需要对第一过孔21与第二过孔22之间的间距进行限定，也即，只要保证第一过孔21与第二过孔22不连通即可。因此，第一过孔21与第二过孔22在平行于第一直线W的方向上的距离可以设置的更窄，从而有助于在过孔区域121设置更多数量的过孔2。
又示例性的，如图3所示，第一过孔21在参考面S上的正投影中心和第二过孔22在参考面S上的正投影中心所在的直线为第二直线V，第二直线V与第一直线W之间的夹角为α，其中，0°＜α≤15°，并且第一过孔21和第二过孔22在平行于第一直线W的方向上的间距d1大于或等于1mm。
这样设置，使得第一直线W和第二直线V之间的夹角较小(例如0°＜α≤15°)，有助于减小过孔区域沿垂直于第一直线W方向上的宽度。而且由于第一过孔21和第二过孔22在平行于第一直线W的方向上的间距d1大于或等于1mm，还使得在第一直线W和第二直线V之间的夹角较小时，第一过孔21和第二过孔22在平行于所述第一直线W的方向上的间距较大，从而使得过孔区域在受到弯折区域产生的拉力而发生错动时不容易断裂。
其中，第一过孔21与第二过孔22在平行于第一直线W的方向上的间距d1可以为1mm～2mm。例如，在该间距d1等于或趋近于1mm时，有助于在平行于过孔区域内设置更多数量的过孔2。又例如，在该间距等于或趋近于2mm时，有助于提高过孔区域的抗断裂效果。
在一些实施例中，如图2所示，相邻的两个第一过孔21之间的间距d2大于或等于2mm。通过这样设置，使得相邻的两个第一过孔21之间的间距d2较大，也即相邻的两个过孔2之间连接部分的面积较大，这样，即使相邻两个第一过孔21在参考面S上的正投影中心均落在同一直线上，在过孔区域受到弯折区域产生的拉力时，相邻的两个过孔2之间的连接部分也不容易被拉断，从而使得柔性电路板的过孔区域不容易出现断裂，进而不容易因过孔区域断裂而损坏柔性电路板上的电路，有助于提高柔性电路板的使用寿命。
其中，需要说明的是，任意一个第一过孔21在参考面S上的正投影的中心和任意一个第二过孔22在参考面S上的正投影的中心，这两者可以落在一 条第二直线V上。例如，如图4所示，第一过孔21a在参考面S上的正投影的中心可以与第二过孔22a在参考面S上的正投影的中心落在一条第二直线V1上，或者第一过孔21a在参考面上的正投影的中心可以与第二过孔22b在参考面S上的正投影的中心共同落在一条第二直线V2上，或者，第二过孔22a在参考面上的正投影的中心可以与第一过孔21b在参考面S上的正投影的中心落在一条第二直线V3上。
在一些实施例中，如图5A～图5C所示，多个过孔2中任意两个过孔2在参考面S上的正投影中心不落在与弯折区域的弯曲轴线平行的同一直线上。即，当有一个过孔2在参考面S上的正投影的中心落在与弯折区域的弯曲轴线平行的第一直线W上时，其余过孔2在参考面S上的正投影均不会落在该第一直线W上。例如，多个过孔2中只有一个第一过孔21，该第一过孔21可以是多个过孔2中的任意一个过孔2，而其余过孔2均为第二过孔22。这样，过孔区域受到与弯折区域产生的拉力时，由于在垂直于第一直线的方向上每隔一段距离仅出现一个过孔，使得弯折区域不容易断裂，从而进一步提高柔性电路板的弯曲性能。
需要说明的是，图5A～图5C仅示意出了本公开中“多个过孔2中任意两个过孔2在参考面S上的正投影中心不落在与弯折区域的弯曲轴线平行的同一直线上”的三种可能的情况，本公开并不仅限于图5A～5C中所示的方案。
在一些实施例中，如图6所示，所述多个过孔2沿平行于所述第一直线W的方向(例如图6中由左至右的方向)依次分为至少两部分过孔，且相邻的两部分过孔中，一部分过孔(例如，在图6中，从左往右数前四个过孔)沿平行于所述第一直线的方向逐渐远离所述弯折区域，另一部分过孔(例如，在图6中，从左往右数第五至第七个过孔)沿平行于所述第一直线的方向逐渐靠近所述弯折区域。
在一些实施例中，如图1和图7所示，柔性电路板100还包括设置在绝缘基材1第一侧表面上的第一导电层3，第一导电层3包括多个第一引脚31和多条第一导电线32，多个第一引脚31位于绑定区域123，多条第一导电线32的第一端与多个第一引脚31中的至少部分第一引脚31一一对应连接。设置在绝缘基材1第二侧表面上的第二导电层4，第二导电层4包括多条第二导电线41，多条第二导电线41的第一端通过多个过孔2与多条第一导电线32的第二端一一对应连接。
其中，多条第二导电线41的第二端可以直接或间接地连接至上述芯片15(例如触摸控制芯片或驱动控制芯片)。例如，如图8所示，第一导电层3 还可以包括连接至位于主体部分11的芯片15的第三导电线33，此时第二导电线41的第二端可以通过位于主体部分11的过孔与第三导电线33相连接。又例如，第二导电线41的第二端也可以直接通过位于主体部分11安装芯片15处的过孔连接至芯片15。
上述柔性电路板100中第一延伸部分12的数量可以是一个，也可以是多个。
在一些实施例中，如图8所示，第一延伸部分12的数量可以为两个。此时，多个第一引脚31中的一部分第一引脚31位于一个第一延伸部分12的绑定区域123，多个第一引脚31中的另一部分位于另一个第一延伸部分12的绑定区域123。多条第一导电线32中的一部分第一导电线32的第一端与一部分第一引脚31中的至少部分第一引脚31一一对应连接，多条第一导电线32中的另一部分第一导电线32的第一端与另一部分第一引脚31中的至少部分第一引脚31一一对应连接。多条第二导电线41中的一部分第二导电线41的第一端通过一个第一延伸部分12上的多个过孔2与一部分第一导电线32的第二端一一对应连接，多条第二导电线41中的另一部分第二导电线41的第一端通过另一个第一延伸部分12上的多个过孔2与另一部分第一导电线32的第二端一一对应连接。
在此基础上，示例性的，如图8所示，第一导电层3还包括多条第四导电线34和多条第五导电线35。其中，多条第四导电线34可以连接在芯片15与第一导电线32之间。
多条第五导电线35的第一端可以通过位于主体部分11的过孔与上述多条第二导电线41中的一部分第二导电线41的第二端连接，并且多条第五导电线35的第二端可以通过位于主体部分11的过孔与上述多条第二导电线41中的另一部分第二导电线41的第二端连接。
这样设置，可以使芯片15的输出端同时连接到两个第一延伸部12上的第一引脚31。
在一些实施例中，参见图8，两个第一延伸部分12均与主体部分11的第一侧边缘相连。这样，柔性电路板100包括两个第一延伸部分12，柔性电路板100上的电路可以通过两个第一延伸部分12与显示面板上的电路电连接。示例性的，主体部分11上设置有触摸控制芯片(例如芯片15)，当柔性电路板100包括两个第一延伸部分12时，触摸控制芯片的输出端可以通过两个第一延伸部分12上的多个第一引脚31同时连接至显示面板中的触控电极，也即，这样可以使触摸控制芯片可以通过两部分导电线同时连接触控电极，从 而有助于减小触摸控制芯片与触控电极之间的电阻，提高显示装置中触摸控制电路的控制精度。
在一些实施例中，如图1和图8所示，柔性电路板100还包括第二延伸部分13和插接结构14，其中第二延伸部分13与主体部分11的第二侧边缘相连，第一侧边缘和第二侧边缘位于主体部分11的相对两侧。插接结构14设置于第二延伸部分13远离主体部分11的一端。其中，插接结构14插接在例如显示装置的主控电路板。
在一些实施例中，如图7所示，柔性电路板100还包括第一绝缘层5、第二绝缘层6，第一屏蔽层7和第二屏蔽层8。其中，第一绝缘层5位于第一导电层3远离绝缘基材1的一侧。第二绝缘层6位于第二导电层4远离绝缘基材1的一侧。第一屏蔽层7位于第一绝缘层5远离绝缘基材1的一侧，第一屏蔽层7覆盖主体部分11和过孔区域121。第二屏蔽层8位于第二绝缘层6远离绝缘基材1的一侧，第二屏蔽层8覆盖主体部分11和过孔区域121。其中，第一屏蔽层7和第二屏蔽层8可以屏蔽电磁波，从而可以防止柔性电路板上导电线传输的电信号受到影响。
在一些实施例中，如图7和图9所示，柔性电路板100还包括保护层9，保护层9设置在第二屏蔽层8远离绝缘基材1的一侧，且保护层9覆盖过孔区域121。保护层9用于保护过孔区域121，防止过孔区域121受到拉力时发生断裂。
本公开的一些实施例还提供了一种显示装置300，如图10所示，该显示装置300包括本公开上述任一实施例所述的柔性电路板100和显示面板200，柔性电路板100的绑定区域123绑定在显示面板200上。
其中，显示装置300可以是可折叠式显示装置，可折叠式显示装置的弯折轴与柔性电路板100中弯折区域的弯曲轴线大致平行。此处，“大致平行”，是指两者互相平行，或者，是指两者近似平行(例如两者在上述参考面内的正投影的夹角小于或等于10度)。
需要说明的是，当可折叠式显示装置沿其弯折轴进行弯折时，显示面板同样受力弯曲，从而会带动与其绑定的柔性电路板发生错动。当柔性电路板发生错动时，过孔区域会受到弯折区域对其产生的拉力的作用，此时，如果过孔区域设置的多个过孔在参考面上的正投影中心均落在于弯折区域的弯折轴线平行的同一直线上，容易导致过孔区域容易发生断裂，使得柔性电路板损坏，进而造成显示装置无法实现触控和/或显示的功能。
而本公开一些实施例的柔性电路板100中，过孔区域121上的多个过孔2 中既包括正投影中心落在第一直线W上的第一过孔21，又包括正投影中心不落在该第一直线W上的第二过孔22，使得在该过孔区域121受到弯折区域122产生的拉力而发生错动时，该过孔区域121不容易发生断裂，整个柔性电路板100的弯折性能较强。因此，本公开上述实施例中所提供的采用该柔性电路板的折叠显示装置的可靠性较高，使用寿命更长。
在一些实施例中，如图10所示，显示装置300还包括支撑部301，支撑部301设置在柔性电路板100的主体部分靠近显示面板200之间。此时，支撑部301可以实现支撑柔性电路板100的主体部分11，从而使得主体部分11即使安装有芯片15或其它电子器件也不容易产生晃动，有助于提高柔性电路板的使用寿命。
其中，上述显示装置300例如可以是电视、数码相机、手机、手表、平板电脑、笔记本电脑、导航仪等任何具有显示功能的部件。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (15)

  1. 一种柔性电路板，包括：
    绝缘基材，所述绝缘基材包括主体部分和与所述主体部分的边缘相连的至少一个第一延伸部分；
    所述第一延伸部分包括依次远离所述主体部分的过孔区域、弯折区域和绑定区域；
    所述过孔区域设置有多个过孔，所述多个过孔包括至少一个第一过孔和至少一个第二过孔，其中，第一过孔在平行于所述过孔区域的参考面上的正投影中心落在与所述弯折区域的弯曲轴线平行的第一直线上，第二过孔在所述参考面上的正投影中心不落在所述第一直线上。
  2. 根据权利要求1所述的柔性电路板，其中，
    所述第一过孔在所述参考面上的正投影中心和所述第二过孔在所述参考面上的正投影中心所在的直线为第二直线，所述第二直线与所述第一直线之间的夹角为α，其中，15°＜α≤90°。
  3. 根据权利要求1所述的柔性电路板，其中，
    所述第一过孔在所述参考面上的正投影中心和所述第二过孔在所述参考面上的正投影中心所在的直线为第二直线，所述第二直线与所述第一直线之间的夹角为α，其中，0°＜α≤15°，并且所述第一过孔和所述第二过孔在平行于所述第一直线的方向上的间距大于或等于1mm。
  4. 根据权利要求3所述的柔性电路板，其中，所述第一过孔与所述第二过孔在平行于所述第一直线的方向上的间距为1mm～2mm；和/或，
    相邻的两个所述第一过孔之间的间距大于或等于2mm。
  5. 根据权利要求1～4中任一项所述的柔性电路板，其中，
    所述多个过孔中任意两个过孔在所述参考面上的正投影中心不落在与所述弯折区域的弯曲轴线平行的同一直线上。
  6. 根据权利要求1～4中任一项所述的柔性电路板，其中，
    所述多个过孔沿平行于所述第一直线的方向依次分为至少两部分过孔，且相邻的两部分过孔中，一部分过孔沿平行于所述第一直线的方向逐渐远离所述弯折区域，另一部分过孔沿平行于所述第一直线的方向逐渐靠近所述弯折区域。
  7. 根据权利要求1～6中任一项所述的柔性电路板，还包括：
    设置在所述绝缘基材第一侧表面上的第一导电层，所述第一导电层包括多个第一引脚和多条第一导电线，所述多个第一引脚位于所述绑定区域，所 述多条第一导电线的第一端与所述多个第一引脚中的至少部分第一引脚一一对应连接；
    设置在所述绝缘基材第二侧表面上的第二导电层，所述第二导电层包括多条第二导电线，所述多条第二导电线的第一端通过所述多个过孔与所述多条第一导电线的第二端一一对应连接。
  8. 根据权利要求7所述的柔性电路板，其中，所述第一延伸部分的数量为两个；
    所述多个第一引脚中的一部分第一引脚位于一个所述第一延伸部分的绑定区域，所述多个第一引脚中的另一部分位于另一个所述第一延伸部分的绑定区域；
    所述多条第一导电线中的一部分第一导电线的第一端与所述一部分第一引脚中的至少部分第一引脚一一对应连接，所述多条第一导电线中的另一部分第一导电线的第一端与所述另一部分第一引脚中的至少部分第一引脚一一对应连接；
    所述多条第二导电线中的一部分第二导电线的第一端通过一个所述第一延伸部分上的多个过孔与所述一部分第一导电线的第二端一一对应连接，所述多条第二导电线中的另一部分第二导电线的第一端通过另一个所述第一延伸部分上的多个过孔与所述一部分第一导电线的第二端一一对应连接。
  9. 根据权利要求8所述的柔性电路板，其中，两个所述第一延伸部分均与所述主体部分的第一侧边缘相连。
  10. 根据权利要求9所述的柔性电路板，其中，所述绝缘基材还包括：
    第二延伸部，与所述主体部分的第二侧边缘相连，所述第一侧边缘和第二侧边缘位于所述主体部分的相对两侧；
    插接结构，设置于所述第二延伸部远离所述主体部分的一端。
  11. 根据权利要求1～10中任一项所述的柔性电路板，还包括：
    第一绝缘层，位于所述第一导电层远离所述绝缘基材的一侧；
    第二绝缘层，位于所述第二导电层远离所述绝缘基材的一侧；
    第一屏蔽层，位于所述第一绝缘层远离所述绝缘基材的一侧，所述第一屏蔽层覆盖所述主体部分和所述过孔区域；
    第二屏蔽层，位于所述第二绝缘层远离所述绝缘基材的一侧，所述第一屏蔽层覆盖所述主体部分和所述过孔区域；
    所述第一屏蔽层和所述第二屏蔽层用于屏蔽电磁波。
  12. 根据权利要求1～11中任一项所述的柔性电路板，还包括：
    保护层，设置于所述第二屏蔽层远离所述绝缘基材的一侧，所述保护层覆盖于所述过孔区域。
  13. 一种显示装置，包括：
    如权利要求1～12中任一项所述的柔性电路板；
    显示面板，所述柔性电路板的绑定区域绑定在所述显示面板上。
  14. 根据权利要求13所述的显示装置，其中，所述显示装置为可折叠式显示装置。
  15. 根据权利要求13或14所述的显示装置，还包括：
    支撑部，设置于所述柔性电路板的主体部分与所述显示面板之间。
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