CN110865740B - Carrier film and preparation method thereof - Google Patents
Carrier film and preparation method thereof Download PDFInfo
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- CN110865740B CN110865740B CN201911175101.1A CN201911175101A CN110865740B CN 110865740 B CN110865740 B CN 110865740B CN 201911175101 A CN201911175101 A CN 201911175101A CN 110865740 B CN110865740 B CN 110865740B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 238000005452 bending Methods 0.000 claims abstract description 90
- 239000000758 substrate Substances 0.000 claims abstract description 67
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 13
- 239000012528 membrane Substances 0.000 abstract description 11
- 239000011159 matrix material Substances 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 209
- 238000004513 sizing Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 3
- 239000011147 inorganic material Substances 0.000 description 3
- 229910010272 inorganic material Inorganic materials 0.000 description 3
- 239000011368 organic material Substances 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
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Classifications
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- 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
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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- Theoretical Computer Science (AREA)
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to the technical field of display, and provides a bearing film and a preparation method thereof. The flexible bearing film is configured to bear the display panel when the display panel is attached to the curved cover plate and is attached to the bending forming jig, and comprises a substrate film layer and a smooth film layer; the smooth membrane layer is arranged on one surface of the matrix membrane layer, which is close to the bending jig, and the friction coefficient of the smooth membrane layer is smaller than that of the matrix membrane layer, and at least covers the area of the matrix membrane layer, which is attached to the bending jig. The friction coefficient of the smooth film layer is smaller, the relative displacement between the flexible bearing film and the bending forming jig in the pressing process can be increased, and air between the flexible bearing film and the display panel is extruded, so that the defects such as attaching bubbles between the flexible bearing film and the display panel are reduced.
Description
Technical Field
The invention relates to the technical field of display, in particular to a bearing film and a preparation method of the bearing film.
Background
In recent years, flexible display devices prepared by using polyimide flexible substrates instead of glass substrates have been receiving a great deal of attention, and there is an increasing application space in the display field. Compared with a rigid display, the flexible display has the characteristics of being foldable, bendable and portable, and provides more design ideas for terminal products.
At present, a flexible OLED display panel and a curved cover plate are subjected to arc surface lamination by the existing terminal to obtain a curved edge display product. The main process for realizing the lamination of the arc surface is to press the display panel and the cover plate by using a bending forming jig with a certain fillet. The process needs to prestretch the display panel by using the bearing film, and bad process effects such as larger bubbles when the bearing film is attached to the display panel can occur.
Therefore, a new carrier film and a method for producing the carrier film are necessary to be studied.
The above information disclosed in the background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to overcome the defect of larger bonding bubbles in the prior art and provides a bearing film for reducing bonding bubbles and a preparation method of the bearing film.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
According to an aspect of the present disclosure, there is provided a flexible carrier film configured to carry a display panel when the display panel is attached to a curved cover plate and attach to a bending jig, the flexible carrier film comprising:
A base film layer;
The smooth film layer is arranged on one surface of the substrate film layer, which is close to the bending jig, and the friction coefficient of the smooth film layer is smaller than that of the substrate film layer, and the smooth film layer at least covers the area of the substrate film layer, which is attached to the bending jig.
In one exemplary embodiment of the present disclosure, the base film layer is provided with a rectangular shape and the smooth film layer is provided with a rectangular shape.
In one exemplary embodiment of the present disclosure, the smooth film layer is to be curved in a first direction, and the smooth film layer is not to be curved in a second direction;
the length of the smooth film layer in the first direction meets the following conditions:
Wherein a 1 and a 2 are constants, and the value is 1 or 0; r 1 is the radius of a first arc surface of the bending jig in the first direction, and R 2 is the radius of a second arc surface of the bending jig in the first direction; θ 1 is the angle value of the central angle corresponding to the first arc surface, and θ 2 is the angle value of the central angle corresponding to the second arc surface; l 1 is the length of the upper surface flat area of the bending forming jig in the first direction;
The length Y g of the smooth film layer in the second direction meets the following conditions: the number of the L 2≤Yg≤Yc is two,
Wherein Y c is the length of the substrate film layer in the second direction, and L 2 is the length of the upper surface flat region of the bending jig in the second direction.
In one exemplary embodiment of the present disclosure, the base film layer includes a rectangular first base film layer region and a rectangular second base film layer region, the first base film layer region crisscross the second base film layer region forming an orthogonal cross;
the smooth rete includes rectangular first smooth rete and rectangular second smooth rete, first smooth rete is located in the first base member rete district, the second smooth rete splice in one side of first smooth rete and extend to in the second base member rete district.
In one exemplary embodiment of the present disclosure, the first smooth film layer is to be bent in a first direction, and the first smooth film layer is not to be bent in a second direction;
The length X g1 of the first smooth film layer in the first direction meets the following conditions:
Wherein a 1 and a 2 are constants, and the value is 1 or 0; r 1 is the radius of a first arc surface of the bending jig in the first direction, and R 2 is the radius of a second arc surface of the bending jig in the first direction; θ 1 is the angle value of the central angle corresponding to the first arc surface, and θ 2 is the angle value of the central angle corresponding to the second arc surface; l 1 is the length of the upper surface flat area of the bending forming jig in the first direction;
The length Y g1 of the first smooth film layer in the second direction meets the following conditions: the number of the L 2≤Yg1≤Yc1 is two,
Wherein Y c1 is the length of the first substrate film region in the second direction, and L 2 is the length of the upper surface flat region of the bending jig in the second direction;
the second smooth film layer is not bent in the first direction, and the second smooth film layer is to be bent in the second direction;
The length X g2 of the second smooth film layer in the first direction meets the following conditions: the number of the L 1≤Xg2≤Xc2 is two,
Wherein X c2 is the length of the second substrate film region in the first direction, and L 1 is the length of the upper surface flat region of the bending jig in the first direction;
the length Y g2 of the second smooth film layer in the second direction meets the following conditions:
Wherein R 3 is the radius of the third arc surface of the bending jig in the second direction, θ 3 is the angle value of the central angle corresponding to the third arc surface, L 2 is the length of the upper surface flat area of the bending jig in the second direction, and Y g1 is the length of the first smooth film layer in the second direction.
In one exemplary embodiment of the present disclosure, the base film layer includes a rectangular first base film layer region and a rectangular second base film layer region, the first base film layer region crisscross the second base film layer region forming an orthogonal cross;
the smooth rete includes rectangular first smooth rete district and rectangular second smooth rete district, the second smooth rete district with first smooth rete district crisscross formation quadrature cross, first smooth rete district is located in the first base member rete district, the both ends in second smooth rete district extend to in the second base member rete district.
In an exemplary embodiment of the present disclosure, the first smooth film layer region is to be curved in a first direction, and the first smooth film layer region is not to be curved in a second direction;
The length X g1 of the first smooth film layer area in the first direction meets the following conditions:
Wherein a 1 and a 2 are constants, and the value is 1 or 0; r 1 is the radius of a first arc surface of the bending jig in the first direction, and R 2 is the radius of a second arc surface of the bending jig in the first direction; θ 1 is the angle value of the central angle corresponding to the first arc surface, and θ 2 is the angle value of the central angle corresponding to the second arc surface; l 1 is the length of the upper surface flat area of the bending forming jig in the first direction;
The length Y g1 of the first smooth film layer area in the second direction meets the following conditions: the number of the L 2≤Yg1≤Yc1 is two,
Wherein Y c1 is the length of the first substrate film region in the second direction, and L 2 is the length of the upper surface flat region of the bending jig in the second direction;
the second smooth film layer area is not bent in the first direction, and the second smooth film layer area is to be bent in the second direction;
The length X g2 of the second smooth film layer region in the first direction meets the following conditions: the number of the L 1≤Xg2≤Xc2 is two,
Wherein X c2 is the length of the second substrate film region in the first direction, and L 1 is the length of the upper surface flat region of the bending jig in the first direction;
the length Y g2 of the second smooth film layer region in the second direction satisfies the following conditions:
Wherein a 3 and a 4 are constants, and the value is 1 or 0; r 3 is the radius of a third arc surface of the bending jig in the second direction, and R 4 is the radius of a fourth arc surface of the bending jig in the second direction; θ 3 is the angle value of the central angle corresponding to the third arc surface, and θ 4 is the angle value of the central angle corresponding to the fourth arc surface; l 2 is the length of the upper surface flat area of the bending jig in the second direction.
In one exemplary embodiment of the present disclosure, the smooth film layer completely covers the base film layer.
In an exemplary embodiment of the present disclosure, the smooth film layer has a thickness of 0.001 μm or more and 50 μm or less.
According to one aspect of the present disclosure, there is provided a method for preparing a flexible carrier film configured to carry a display panel when the display panel is attached to a curved cover plate and attach to a bending jig, the method comprising:
Providing a substrate film layer;
and forming a smooth film layer on one surface of the substrate film layer, which is close to the bending jig, wherein the friction coefficient of the smooth film layer is smaller than that of the substrate film layer, and the smooth film layer at least covers the area of the substrate film layer, which is attached to the bending jig.
According to the technical scheme, the invention has at least one of the following advantages and positive effects:
The flexible bearing film comprises a substrate film layer and a smooth film layer, wherein the smooth film layer is arranged on one surface of the substrate film layer, which is close to the bending forming jig, the friction coefficient of the smooth film layer is smaller than that of the substrate film layer, and the smooth film layer at least covers the area of the substrate film layer, which is attached to the bending forming jig. The friction coefficient of the smooth film layer is smaller, the relative displacement between the flexible bearing film and the bending forming jig in the pressing process can be increased, and air between the flexible bearing film and the display panel is extruded, so that the defects such as attaching bubbles between the flexible bearing film and the display panel are reduced.
Drawings
The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
FIG. 1 is a schematic view of a flexible carrier film of the present invention for arcuate surface attachment in an embodiment taken from a first direction;
FIG. 2 is a schematic view of a flexible carrier film of the present invention cut from a second direction for use in conforming to another embodiment of the arcuate surface;
FIG. 3 is a schematic view of the construction of a first embodiment of the flexible carrier film of the present invention;
FIG. 4 is a schematic view of a second embodiment of a flexible carrier film of the present invention;
FIG. 5 is a schematic view of the structure of a third embodiment of the flexible carrier film of the invention;
FIG. 6 is a schematic view of a fourth embodiment of a flexible carrier film of the present invention;
FIG. 7 is a schematic illustration of the structure and sizing of the base film layer of FIGS. 5 and 6;
FIG. 8 is a schematic illustration of the structure and sizing of the smooth film layer of FIG. 5;
FIG. 9 is a schematic illustration of the structure and sizing of the smooth film layer of FIG. 6;
Fig. 10 is a schematic structural view of a fifth embodiment of the flexible carrier film of the invention.
The main element reference numerals in the drawings are explained as follows:
1.A curved cover plate; 2.a display panel;
3. a base film layer; 31. a first substrate film region; 32. a second substrate film region;
4. a smooth film layer; 41. a first smooth film layer; 42. a second smooth film layer; 43. a first smooth film layer region; 44. a second smooth film layer region;
5. A heat dissipation film; 6. a combination film; 7. bending forming jig.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.
The invention firstly provides a flexible bearing film, and the flexible bearing film is used for adhering an arc surface to a structural schematic drawing of an embodiment cut from a first direction, wherein the structural schematic drawing is shown in FIG. 1; the flexible carrier film is configured to carry the display panel 2 and attach to the bending jig 7 when the display panel 2 attaches to the curved cover plate 1. In the first direction, the length of the upper surface flat area of the bending jig 7 in the first direction is L 1, the bending jig 7 is provided with two arc surfaces, namely a first arc surface and a second arc surface, the radius of the first arc surface is R 1, the angle value of the central angle corresponding to the first arc surface is theta 1, the radius of the second arc surface is R 2, and the angle value of the central angle corresponding to the second arc surface is theta 2.
Referring to FIG. 2, a schematic view of a flexible carrier film of the present invention for use in circular arc surface fitting is shown in a configuration cut from a second direction; a heat dissipation film 5 and a combination film 6 may also be disposed on the display panel 2, and the combination film 6 may include a touch screen, a polarizer, an OCA optical adhesive layer, and the like. The radius of the arc surface of the bending forming jig 7 is smaller than or equal to the radius of the arc surface of the curved cover plate 1. In the second direction, the length of the upper surface flat area of the bending jig 7 in the second direction is L 2, the bending jig 7 has two circular arc surfaces, namely a third circular arc surface and a fourth circular arc surface, the radius of the third circular arc surface is R 3, the angle value of the central angle corresponding to the third circular arc surface is θ 3, the radius of the fourth circular arc surface is R 4, and the angle value of the central angle corresponding to the fourth circular arc surface is θ 4.
The flexible carrier film may include a base film layer 3 and a smooth film layer 4; the smooth membrane layer 4 is arranged on one surface of the matrix membrane layer 3, which is close to the bending jig 7, and the friction coefficient of the smooth membrane layer 4 is smaller than that of the matrix membrane layer 3, and the smooth membrane layer 4 at least covers the area of the matrix membrane layer 3, which is attached to the bending jig 7.
The flexible carrier film of the present invention is described in detail below with respect to five exemplary embodiments.
Example embodiment one:
reference is made to the schematic structural diagram of a first embodiment of the flexible carrier film of the invention shown in figure 3.
In the present exemplary embodiment, the flexible carrier film is used to carry the display panel 2 forming two circular arc surfaces, and the two formed circular arc surfaces are identical, and the two circular arc surfaces are disposed opposite to each other. The smooth film layer 4 is to be bent in a first direction and not in a second direction when in use, the first direction being perpendicular to the second direction. The first direction may be a length direction or a width direction of the display panel 2, and the second direction may be a width direction or a length direction of the display panel 2.
The base film layer 3 may be provided in a rectangular shape, and the base film layer 3 has two dimensions, that is, a length X c in the first direction and a length Y c in the second direction. The smooth film layer 4 is also provided in a rectangular shape, and the smooth film layer 4 also has two dimensions, i.e., a length X g in the first direction and a length Y g in the second direction.
In the present exemplary embodiment, the length X g of the smooth film layer 4 in the first direction satisfies:
Wherein a 1 and a 2 are constants, and the value is 1 or 0; r 1 is the radius of a first arc surface of the bending jig 7 in the first direction, and R 2 is the radius of a second arc surface of the bending jig 7 in the first direction; θ 1 is the angle value of the central angle corresponding to the first arc surface, θ 2 is the angle value of the central angle corresponding to the second arc surface, and values of θ1 and θ 2 can be 50 °, 55 °, 60 °, 75 °, 90 °,100 °, 120 ° and the like; l 1 is the length of the upper surface flat area of the bending jig 7 in the first direction.
In the present exemplary embodiment, since the display panel 2 is to have two circular arc surfaces, and the two circular arc surfaces are identical, the values of a 1 and a 2 are 1, the values of R 1 and R 2 are also identical, and the values of θ1 and θ 2 are also identical.
Of course, in other exemplary embodiments of the present invention, the display panel 2 may also form an arc surface, and at this time, one of a 1 or a 2 takes on a value of 0. The display panel 2 may also form two different arc surfaces, where the values of a 1 and a 2 are 1, the values of R 1 and R 2 are different, and the values of θ1 and θ 2 are also different.
In the present exemplary embodiment, the length Y g of the smooth film layer 4 in the second direction satisfies:
L2≤Yg≤Yc。
Wherein Y c is the length of the substrate film layer 3 in the second direction, and L 2 is the length of the upper surface flat region of the bending jig 7 in the second direction.
In the present exemplary embodiment, the thickness of the smooth film layer 4 is 0.001 μm or more and 50 μm or less, preferably 0.001 μm or more and 10 μm or less.
Example embodiment two:
Referring to the schematic structural diagram of the second embodiment of the flexible carrier film of the present invention shown in fig. 4, for clarity of the size relationship between the smooth film layer 4 and the base film layer 3, the smooth film layer 4 and the base film layer 3 are drawn separately, and are not meant to represent that the smooth film layer 4 and the base film layer 3 are disposed separately.
In this exemplary embodiment, the flexible carrier film is used to carry the display panel 2 forming one arc surface or two arc surfaces, and the two arc surfaces formed are disposed opposite to each other, and the two arc surfaces may be the same or different. The smooth film layer 4 is to be bent in a first direction and not in a second direction during use. The first direction is perpendicular to the second direction. The first direction may be a length direction or a width direction of the display panel 2, and the second direction may be a width direction or a length direction of the display panel 2. The base film layer 3 may be provided in a rectangular shape, and the base film layer 3 has two dimensions, that is, a length X c in the first direction and a length Y c in the second direction. The smooth film layer 4 is also provided in a rectangular shape, and the smooth film layer 4 also has two dimensions, i.e., a length X g in the first direction and a length Y g in the second direction. The smooth film layer 4 completely covers the base film layer 3, i.e. the size of the smooth film layer 4 is the same as the size of the base film layer 3, X c＝Xg and Y g＝Yc.
In the present exemplary embodiment, the thickness of the smooth film layer 4 is 0.001 μm or more and 50 μm or less, preferably 0.001 μm or more and 10 μm or less.
Example embodiment three:
referring to fig. 5, a schematic structural view of a third embodiment of the flexible carrier film of the present invention is shown.
In the present exemplary embodiment, the flexible carrier film is used to carry the display panel 2 forming three circular arc surfaces, wherein two circular arc surfaces are formed in the first direction, the two circular arc surfaces are identical and oppositely disposed, and one circular arc surface is formed in the second direction. The first direction is perpendicular to the second direction. The first direction may be a length direction or a width direction of the display panel 2, and the second direction may be a width direction or a length direction of the display panel 2.
Referring to the structure and dimensioning of the base film layer shown in fig. 7; the substrate film layer 3 is arranged in an orthogonal cross shape, and the substrate film layer 3 comprises a rectangular first substrate film layer area 31 and a rectangular second substrate film layer area 32, wherein the first substrate film layer area 31 and the second substrate film layer area 32 are crossed in a cross shape to form the orthogonal cross shape. The first base film layer region 31 has two dimensions, namely a length in the first direction X c1 and a length in the second direction Y c1. The second base film layer region 32 has two dimensions, namely a length in the first direction X c2 and a length in the second direction Y c2. Referring to FIG. 8, a schematic illustration of the structure and sizing of the smooth film layer of FIG. 5; the smooth film layer 4 includes a rectangular first smooth film layer 41 and a rectangular second smooth film layer 42, the first smooth film layer 41 is located in the first substrate film layer region 31, the second smooth film layer 42 is spliced on one side of the first smooth film layer 41 and extends into the second substrate film layer region 32, and the lengths of the two ends of the first smooth film layer 41 protruding out of the second smooth film layer 42 are the same. That is, the smooth film layer 4 is provided in a T shape. The first smooth film layer 41 has two dimensions, namely a length X g1 in the first direction and a length Y g1 in the second direction. The second smooth film layer 42 has two dimensions, namely a length in the first direction X g2 and a length in the second direction Y g2.
In the present exemplary embodiment, the first smooth film layer 41 is to be bent in the first direction and not bent in the second direction when in use.
The length X g1 of the first smooth film layer 41 in the first direction satisfies:
Wherein a 1 and a 2 are constants, and the value is 1 or 0; r 1 is the radius of a first arc surface of the bending jig 7 in the first direction, and R 2 is the radius of a second arc surface of the bending jig 7 in the first direction; θ 1 is the angle value of the central angle corresponding to the first arc surface, θ 2 is the angle value of the central angle corresponding to the second arc surface, and values of θ1 and θ 2 can be 50 °, 55 °, 60 °, 75 °, 90 °,100 °, 120 ° and the like; l 1 is the length of the upper surface flat area of the bending jig 7 in the first direction.
In the present exemplary embodiment, since the display panel 2 is to form two circular arc surfaces in the first direction, and the two formed circular arc surfaces are identical, the values of a 1 and a 2 are 1, the values of R 1 and R 2 are also identical, and the values of θ1 and θ 2 are also identical.
Of course, in other exemplary embodiments of the present invention, the display panel 2 may also form an arc surface in the first direction, and at this time, one of a 1 or a 2 takes on a value of 0. The display panel 2 may also form two different arc surfaces, where the values of a 1 and a 2 are 1, the values of R 1 and R 2 are different, and the values of θ1 and θ 2 are also different.
In the present exemplary embodiment, the length Y g1 of the first smooth film layer 41 in the second direction satisfies: l 2≤Yg1≤Yc1.
Wherein Y c1 is the length of the first substrate film region 31 in the second direction, and L 2 is the length of the upper surface flat region of the bending jig 7 in the second direction.
In the present exemplary embodiment, the second smooth film layer 42 is not bent in the first direction when in use, and the second smooth film layer 42 is to be bent in the second direction;
The length X g2 of the second smooth film layer 42 in the first direction satisfies: l 1≤Xg2≤Xc2.
Wherein X c2 is the length of the second substrate film region 32 in the first direction, and L 1 is the length of the upper surface flat region of the bending jig 7 in the first direction.
The length Y g2 of the second smooth film layer 42 in the second direction satisfies:
Wherein R 3 is the radius of the third arc surface of the bending jig 7 in the second direction, θ 3 is the angle value of the central angle corresponding to the third arc surface, θ 3 may be 50 °, 55 °,60 °, 75 °, 90 ° and the like, L 2 is the length of the upper surface flat region of the bending jig 7 in the second direction, and Y g1 is the length of the first smooth film layer 41 in the second direction.
It should be noted that the value of R 3 may be the same as or different from the value of R 1 or R 2. The value of θ 3 may be the same as or different from the value of θ1 or θ 2.
In the present exemplary embodiment, the thickness of the smooth film layer 4 is 0.001 μm or more and 50 μm or less, preferably 0.001 μm or more and 10 μm or less.
Example embodiment four:
referring to fig. 6, a schematic structural view of a fourth embodiment of the flexible carrier film of the present invention is shown.
In the present exemplary embodiment, the flexible carrier film is used to carry the display panel 2 forming four circular arc surfaces, wherein two identical and opposite circular arc surfaces are formed in the first direction and two identical and opposite circular arc surfaces are formed in the second direction. The first direction is perpendicular to the second direction. The first direction may be a length direction or a width direction of the display panel 2, and the second direction may be a width direction or a length direction of the display panel 2.
Referring to the structure and dimensioning of the base film layer shown in fig. 7; the substrate film layer 3 is arranged in an orthogonal cross shape, the substrate film layer 3 comprises a rectangular first substrate film layer area 31 and a rectangular second substrate film layer area 32, and the first substrate film layer area 31 and the second substrate film layer area 32 are crossed in a cross shape to form an orthogonal cross shape; the first base film layer region 31 has two dimensions, namely a length in the first direction X c1 and a length in the second direction Y c1. The second base film layer region 32 has two dimensions, namely a length in the first direction X c2 and a length in the second direction Y c2. Referring to FIG. 9, a schematic illustration of the structure and sizing of the smooth film layer of FIG. 6; the smooth film layer 4 includes a rectangular first smooth film layer area 43 and a rectangular second smooth film layer area 44, the second smooth film layer area 44 and the first smooth film layer area 43 are crisscrossed to form an orthogonal cross shape, the first smooth film layer area 43 is located in the first substrate film layer area 31, and two ends of the second smooth film layer area 44 extend into the second substrate film layer area 32, i.e. the substrate film layer and the smooth film layer 4 are concentrically arranged. The first smooth film layer region 43 has two dimensions, namely a length X g1 in the first direction and a length Y g1 in the second direction. The second smooth film layer region 44 has two dimensions, namely a length in the first direction X g2 and a length in the second direction Y g2.
In the present exemplary embodiment, the first smooth film layer region 43 is to be bent in a first direction and not bent in a second direction when in use.
The length X g1 of the first smooth film layer region 43 in the first direction satisfies:
Wherein a 1 and a 2 are constants, and the value is 1 or 0; r 1 is the radius of a first arc surface of the bending jig 7 in the first direction, and R 2 is the radius of a second arc surface of the bending jig 7 in the first direction; θ 1 is the angle value of the central angle corresponding to the first arc surface, θ 2 is the angle value of the central angle corresponding to the second arc surface, and values of θ 1 and θ 2 can be 50 °, 55 °, 60 °, 75 °, 90 °, 100 °, 120 ° and the like; l 1 is the length of the upper surface flat area of the bending jig 7 in the first direction.
In the present exemplary embodiment, since the display panel 2 is to form two circular arc surfaces in the first direction, and the two formed circular arc surfaces are identical, the values of a 1 and a 2 are 1, the values of R 1 and R 2 are also identical, and the values of θ1 and θ 2 are also identical.
Of course, in other exemplary embodiments of the present invention, the display panel 2 may also form two different circular arc surfaces in the first direction, where the values of a 1 and a 2 are 1, the values of R 1 and R 2 are different, and the values of θ 1 and θ 2 are also different.
In the present exemplary embodiment, the length Y g1 of the first smooth film layer in the second direction satisfies: l 2≤Yg1≤Yc1.
Wherein Y c1 is the length of the first substrate film region 31 in the second direction, and L 2 is the length of the upper surface flat region of the bending jig 7 in the second direction.
In the present exemplary embodiment, the second smooth film layer region 44 is not curved in the first direction and is curved in the second direction during use.
The length X g2 of the second smooth film layer region 44 in the first direction satisfies: l 1≤Xg2≤Xc2.
Wherein X c2 is the length of the second substrate film region 32 in the first direction, and L 1 is the length of the upper surface flat region of the bending jig 7 in the first direction.
The length Y g2 of the second smooth film region 44 in the second direction satisfies:
Wherein a 3 and a 4 are constants, and the value is 1 or 0; r 3 is the radius of a third arc surface of the bending jig 7 in the second direction, and R 4 is the radius of a fourth arc surface of the bending jig 7 in the second direction; θ 3 is the angle value of the central angle corresponding to the third arc surface, θ 4 is the angle value of the central angle corresponding to the fourth arc surface, and values of θ 3 and θ 4 can be 50 °, 55 °, 60 °, 75 °, 90 °, 100 °, 120 ° and the like; l 2 is the length of the upper surface flat area of the bending jig 7 in the second direction.
In the present exemplary embodiment, since the display panel 2 is to form two circular arc surfaces in the second direction, and the two formed circular arc surfaces are identical, the values of a 3 and a 4 are 1, the values of R 3 and R 4 are also identical, and the values of θ 3 and θ 4 are also identical.
Of course, in other exemplary embodiments of the present invention, the display panel 2 may also form two different circular arc surfaces in the second direction, where the values of a 3 and a 4 are 1, the values of R 3 and R 4 are different, and the values of θ 3 and θ 4 are also different. Four arc surfaces which are different in all can be formed, at the moment, the values of R 1、R2、R3 and R 4 are different, and the values of theta 1、θ2、θ3 and theta 4 are also different. Of course, any two or any three of the same arc surfaces may be formed, which are not described here.
In the present exemplary embodiment, the thickness of the smooth film layer 4 is 0.001 μm or more and 50 μm or less, preferably 0.001 μm or more and 10 μm or less.
Example embodiment five:
Referring to fig. 10, a schematic structural view of a fifth embodiment of the flexible carrier film of the invention is shown. To clearly show the size relationship between the smooth film layer 4 and the base film layer 3, the smooth film layer 4 and the base film layer 3 are drawn separately, and do not represent that the smooth film layer 4 and the base film layer 3 are disposed separately.
In the present exemplary embodiment, the flexible carrier film is used to carry the display panel 2 forming four circular arc surfaces, wherein two identical and opposite circular arc surfaces are formed in the first direction and two identical and opposite circular arc surfaces are formed in the second direction. The first direction is perpendicular to the second direction. The first direction may be a length direction or a width direction of the display panel 2, and the second direction may be a width direction or a length direction of the display panel 2.
The substrate film layer 3 is arranged in an orthogonal cross shape, the substrate film layer 3 comprises a rectangular first substrate film layer area 31 and a rectangular second substrate film layer area 32, and the first substrate film layer area 31 and the second substrate film layer area 32 are crossed in a cross shape to form an orthogonal cross shape; the first base film layer region 31 has two dimensions, namely a length in the first direction X c1 and a length in the second direction Y c1. The second base film layer region 32 has two dimensions, namely a length in the first direction X c2 and a length in the second direction Y c2. The smooth film layer 4 includes a rectangular first smooth film layer region 43 and a rectangular second smooth film layer region 44, and the second smooth film layer region 44 and the first smooth film layer region 43 are crisscrossed to form an orthogonal cross shape. The first smooth film layer region 43 has two dimensions, namely a length X g1 in the first direction and a length Y g1 in the second direction. The second smooth film layer region 44 has two dimensions, namely a length in the first direction X g2 and a length in the second direction Y g2. The smooth film layer 4 completely covers the base film layer 3, i.e. the size of the smooth film layer 4 is the same as the size of the base film layer 3, i.e. X c1＝Xg1,Yc1＝Yg1,Xc2＝Xg2,Yc2＝Yg2.
It should be noted that the smooth film layer 4 completely covers the substrate film layer 3, that is, the smooth film layer 4 has the same size as the substrate film layer 3, and is suitable for forming any number and any size of arc surfaces.
In the present exemplary embodiment, the thickness of the smooth film layer 4 is 0.001 μm or more and 50 μm or less, preferably 0.001 μm or more and 10 μm or less.
Further, the present invention also provides a method for preparing a flexible carrier film, wherein the flexible carrier film is configured to carry the display panel 2 and attach to the bending jig 7 when the display panel 2 attaches to the curved cover plate 1, and the method for preparing the flexible carrier film may include the following steps:
Step S10, providing a base film layer 3.
In step S20, a smooth film layer 4 is formed on one surface of the substrate film layer 3 close to the bending jig 7, the friction coefficient of the smooth film layer 4 is smaller than that of the substrate film layer 3, and the smooth film layer 4 at least covers the region of the substrate film layer 3 attached to the bending jig 7.
The specific structures of the substrate film layer 3 and the smooth film layer 4 have been described in detail above, and thus will not be described here again.
The material of the base film layer 3 may be a polymer film widely used in the industry, such as polyethylene terephthalate (PET), polyimide (PI), or Cyclic Olefin Polymer (COP).
The smooth film layer 4 may be formed on the base film layer 3 by coating, evaporation, or printing. The material of the smooth film layer 4 may be an inorganic material, an organic material, or a mixture of an organic material and an inorganic material.
In addition, the organic or inorganic material for preparing the smooth film layer 4 can be added into the raw slurry for preparing the matrix film layer 3 to form a new flexible bearing film, and the friction coefficient of the new flexible bearing film can be reduced.
The process flow of the module of the OLED flexible screen can refer to the process flow known in the art, and the sequence among the processes can be changed: COP/COF binding- & gt FOP/FOF binding- & gt bending area gluing- & gt binding area coating back glue and positive glue- & gt attaching a combined film 6 (touch screen, polarizer, OCA optical glue layer and the like) on the display panel 2- & gt special-shaped cutting and chamfering- & gt removing the back film- & gt attaching a flexible bearing film- & gt attaching a cover plate- & gt attaching a radiating fin (SCF) and- & gt Pad Bending.
Wherein, the flow of apron laminating can divide into: attaching the flexible bearing film to the display panel 2, placing in attaching equipment (vacuum environment), holding four sides of the flexible bearing film, moving the bending forming jig 7 upwards to attach the display panel 2 to the cover plate, applying pressure and keeping for a certain time, releasing vacuum, and taking out the display panel 2.
The above described features, structures or characteristics may be combined in any suitable manner in one or more embodiments, such as the possible, interchangeable features as discussed in connection with the various embodiments. In the above description, numerous specific details are provided to give a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.
The terms "about" and "approximately" are used in this specification to generally mean within 20%, preferably within 10%, and more preferably within 5% of a given value or range. The numbers given herein are about numbers, meaning that the meaning of "about," "approximately" may still be implied without specific recitation.
Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.
In the present specification, the terms "a," "an," "the," and "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc., in addition to the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and do not limit the number of their objects.
It should be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the specification. The invention is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications are intended to fall within the scope of the present invention. It should be understood that the invention disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present invention. The embodiments described in this specification illustrate the best mode known for carrying out the invention and will enable those skilled in the art to make and use the invention.
Claims (10)
1. A flexible carrier film configured to carry a display panel when attached to a curved cover plate and attach to a bending jig, the flexible carrier film comprising:
A base film layer;
The smooth film layer is arranged on one surface of the substrate film layer, which is close to the bending jig, and the friction coefficient of the smooth film layer is smaller than that of the substrate film layer, and the smooth film layer at least covers the area of the substrate film layer, which is attached to the bending jig.
2. The carrier film of claim 1, wherein the base film layer is rectangular and the smooth film layer is rectangular.
3. The carrier film of claim 2, wherein the smooth film layer is to be flexed in a first direction and the smooth film layer is not flexed in a second direction;
the length of the smooth film layer in the first direction meets the following conditions:
Wherein a 1 and a 2 are constants, and the value is 1 or 0; r 1 is the radius of a first arc surface of the bending jig in the first direction, and R 2 is the radius of a second arc surface of the bending jig in the first direction; θ 1 is the angle value of the central angle corresponding to the first arc surface, and θ 2 is the angle value of the central angle corresponding to the second arc surface; l 1 is the length of the upper surface flat area of the bending forming jig in the first direction;
The length Y g of the smooth film layer in the second direction meets the following conditions: the number of the L 2≤Yg≤Yc is two,
Wherein Y c is the length of the substrate film layer in the second direction, and L 2 is the length of the upper surface flat region of the bending jig in the second direction.
4. The carrier film of claim 1, wherein the base film comprises a rectangular first base film region and a rectangular second base film region, the first base film region crisscrossing with the second base film region to form an orthogonal cross;
the smooth rete includes rectangular first smooth rete and rectangular second smooth rete, first smooth rete is located in the first base member rete district, the second smooth rete splice in one side of first smooth rete and extend to in the second base member rete district.
5. The carrier film of claim 4, wherein the first smooth film layer is to be flexed in a first direction and the first smooth film layer is not flexed in a second direction;
The length X g1 of the first smooth film layer in the first direction meets the following conditions:
Wherein a 1 and a 2 are constants, and the value is 1 or 0; r 1 is the radius of a first arc surface of the bending jig in the first direction, and R 2 is the radius of a second arc surface of the bending jig in the first direction; θ 1 is the angle value of the central angle corresponding to the first arc surface, and θ 2 is the angle value of the central angle corresponding to the second arc surface; l 1 is the length of the upper surface flat area of the bending forming jig in the first direction;
The length Y g1 of the first smooth film layer in the second direction meets the following conditions: the number of the L 2≤Yg1≤Yc1 is two,
Wherein Y c1 is the length of the first substrate film region in the second direction, and L 2 is the length of the upper surface flat region of the bending jig in the second direction;
the second smooth film layer is not bent in the first direction, and the second smooth film layer is to be bent in the second direction;
The length X g2 of the second smooth film layer in the first direction meets the following conditions: the number of the L 1≤Xg2≤Xc2 is two,
Wherein X c2 is the length of the second substrate film region in the first direction, and L 1 is the length of the upper surface flat region of the bending jig in the first direction;
the length Y g2 of the second smooth film layer in the second direction meets the following conditions:
Wherein R 3 is the radius of the third arc surface of the bending jig in the second direction, θ 3 is the angle value of the central angle corresponding to the third arc surface, L 2 is the length of the upper surface flat area of the bending jig in the second direction, and Y g1 is the length of the first smooth film layer in the second direction.
6. The carrier film of claim 1, wherein the base film comprises a rectangular first base film region and a rectangular second base film region, the first base film region crisscrossing with the second base film region to form an orthogonal cross;
the smooth rete includes rectangular first smooth rete district and rectangular second smooth rete district, the second smooth rete district with first smooth rete district crisscross formation quadrature cross, first smooth rete district is located in the first base member rete district, the both ends in second smooth rete district extend to in the second base member rete district.
7. The carrier film of claim 6, wherein the first smooth film layer region is to be curved in a first direction and the first smooth film layer region is not to be curved in a second direction;
The length X g1 of the first smooth film layer area in the first direction meets the following conditions:
Wherein a 1 and a 2 are constants, and the value is 1 or 0; r 1 is the radius of a first arc surface of the bending jig in the first direction, and R 2 is the radius of a second arc surface of the bending jig in the first direction; θ 1 is the angle value of the central angle corresponding to the first arc surface, and θ 2 is the angle value of the central angle corresponding to the second arc surface; l 1 is the length of the upper surface flat area of the bending forming jig in the first direction;
The length Y g1 of the first smooth film layer area in the second direction meets the following conditions: the number of the L 2≤Yg1≤Yc1 is two,
Wherein Y c1 is the length of the first substrate film region in the second direction, and L 2 is the length of the upper surface flat region of the bending jig in the second direction;
the second smooth film layer area is not bent in the first direction, and the second smooth film layer area is to be bent in the second direction;
The length X g2 of the second smooth film layer region in the first direction meets the following conditions: the number of the L 1≤Xg2≤Xc2 is two,
Wherein X c2 is the length of the second substrate film region in the first direction, and L 1 is the length of the upper surface flat region of the bending jig in the first direction;
the length Y g2 of the second smooth film layer region in the second direction satisfies the following conditions:
Wherein a 3 and a 4 are constants, and the value is 1 or 0; r 3 is the radius of a third arc surface of the bending jig in the second direction, and R 4 is the radius of a fourth arc surface of the bending jig in the second direction; θ 3 is the angle value of the central angle corresponding to the third arc surface, and θ 4 is the angle value of the central angle corresponding to the fourth arc surface; l 2 is the length of the upper surface flat area of the bending jig in the second direction.
8. The carrier film of any one of claims 1-7, wherein the smooth film layer completely covers the base film layer.
9. The carrier film of claim 8, wherein the smooth film layer has a thickness of 0.001 μm or more and 50 μm or less.
10. The preparation method of the flexible bearing film is characterized in that the preparation method of the flexible bearing film comprises the following steps of:
Providing a substrate film layer;
and forming a smooth film layer on one surface of the substrate film layer, which is close to the bending jig, wherein the friction coefficient of the smooth film layer is smaller than that of the substrate film layer, and the smooth film layer at least covers the area of the substrate film layer, which is attached to the bending jig.
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| CN111415592B (en) * | 2020-04-29 | 2022-04-15 | 京东方科技集团股份有限公司 | Method for attaching flexible display panel and cover glass and display device |
| CN113035084B (en) * | 2021-04-09 | 2022-12-30 | 成都京东方光电科技有限公司 | Profiling laminating device, profiling laminating method, display module and display device |
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| CN108198515A (en) * | 2018-02-07 | 2018-06-22 | 京东方科技集团股份有限公司 | A kind of laminating apparatus and its application method |
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