CN110865740A - Carrier film and preparation method thereof - Google Patents
Carrier film and preparation method thereof Download PDFInfo
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- CN110865740A CN110865740A CN201911175101.1A CN201911175101A CN110865740A CN 110865740 A CN110865740 A CN 110865740A CN 201911175101 A CN201911175101 A CN 201911175101A CN 110865740 A CN110865740 A CN 110865740A
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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
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- 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
Abstract
The invention relates to the technical field of display, and provides a carrier film and a preparation method thereof. The flexible bearing film is configured to bear the display panel and be attached to the bending forming jig when the display panel is attached to the curved cover plate, and comprises a base film layer and a smooth film layer; the smooth film layer is arranged on one surface, close to the bending forming jig, of the substrate film layer, 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, attached to the bending forming jig, of the substrate film layer. The friction coefficient of smooth rete is less, can increase the relative displacement between flexible carrier film and the bending forming tool in the pressfitting in-process, extrudes the air between flexible carrier film and the display panel away to reduce laminating bubble between flexible carrier film and the display panel etc. bad.
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 polyimide flexible substrates instead of glass substrates have attracted much attention, and have more and more application spaces in the display field. Compared with a rigid display, the flexible display has the characteristics of being foldable, bendable and convenient to carry, and provides more design ideas for terminal products.
At present, a flexible OLED display panel and a curved cover plate are attached to each other by a terminal in an arc surface manner to obtain a curved-edge display product. The main process for realizing the arc surface lamination is to utilize a bending forming jig with a certain fillet to press the display panel and the cover plate. The process needs to use the carrier film to prestretch the display panel, and the poor process effects of large bubbles and the like caused by the attachment of the carrier film and the display panel can occur.
Therefore, it is necessary to research a new carrier film and a method for preparing the carrier film.
The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not constitute 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 that the attached bubbles in the prior art are large, and provides a carrier film for reducing the attached bubbles and a preparation method of the carrier 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, a flexible carrier film is provided, which is configured to bear a display panel and attach to a bending forming fixture when the display panel is attached to a curved cover plate, and the flexible carrier film includes:
a base film layer;
the smooth film layer is arranged on one surface, close to the bending forming jig, of the base body film layer, the friction coefficient of the smooth film layer is smaller than that of the base body film layer, and the smooth film layer at least covers the area, attached to the bending forming jig, of the base body film layer.
In an exemplary embodiment of the present disclosure, the base film layer is configured to be rectangular, and the smooth film layer is configured to be rectangular.
In an exemplary embodiment of the present disclosure, the slippery film layer is to be curved in a first direction, the slippery film layer is not to be curved in a second direction;
the length of the smooth film layer in the first direction satisfies:
wherein, a1And a2Is a constant, and takes the value of 1 or 0; r1Is the radius R of the first arc surface of the bending forming jig in the first direction2The radius of a second arc surface of the bending forming jig in the first direction is shown; theta1Is the angle value of the central angle corresponding to the first arc surface, theta2The angle value of the central angle corresponding to the second arc surface; l is1The length of the upper surface flat area of the bending forming jig in the first direction;
the length Y of the smooth film layer in the second directiongSatisfies the following conditions: l is2≤Yg≤Yc，
Wherein, YcIs the length of the base film layer in the second direction, L2Is the length of the upper surface flat area of the bending forming 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 and the second base film layer region criss-crossing to form an orthogonal cross;
the smooth film layer comprises a rectangular first smooth film layer and a rectangular second smooth film layer, the first smooth film layer is located in the first substrate film layer region, and the second smooth film layer is spliced on one side of the first smooth film layer and extends into the second substrate film layer region.
In an exemplary embodiment of the present disclosure, the first lubricious film layer is to be flexed in a first direction, the first lubricious film layer is not to be flexed in a second direction;
a length X of the first smooth film layer in the first directiong1Satisfies the following conditions:
wherein, a1And a2Is a constant, and takes the value of 1 or 0; r1Is the radius R of the first arc surface of the bending forming jig in the first direction2The radius of a second arc surface of the bending forming jig in the first direction is shown; theta1Is the angle value of the central angle corresponding to the first arc surface, theta2The angle value of the central angle corresponding to the second arc surface; l is1The length of the upper surface flat area of the bending forming jig in the first direction;
the length Y of the first smooth film layer in the second directiong1Satisfies the following conditions: l is2≤Yg1≤Yc1，
Wherein, Yc1Is the length of the first substrate film region in the second direction, L2The length of the upper surface flat area of the bending forming jig in the second direction;
the second lubricious film layer is not curved in a first direction and the second lubricious film layer is to be curved in a second direction;
the length X of the second smooth film layer in the first directiong2Satisfies the following conditions: l is1≤Xg2≤Xc2，
Wherein, Xc2Is the length of the second substrate film region in the first direction, L1The length of the upper surface flat area of the bending forming jig in the first direction;
a length Y of the second smooth film layer in the second directiong2Satisfies the following conditions:
wherein R is3Is the radius theta of the third arc surface of the bending forming jig in the second direction3Is the angle value, L, of the central angle corresponding to the third arc surface2Is the length of the upper surface flat area of the bending forming jig in the second direction, Yg1Is the length of the first lubricious 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 and the second base film layer region criss-crossing to form an orthogonal cross;
the smooth film layer comprises a rectangular first smooth film layer region and a rectangular second smooth film layer region, the second smooth film layer region and the first smooth film layer region are crossed to form an orthogonal cross, the first smooth film layer region is located in the first base film layer region, and two ends of the second smooth film layer region extend into the second base film layer region.
In one exemplary embodiment of the present disclosure, the first smooth film-layer region is to be bent in a first direction, and the first smooth film-layer region is not to be bent in a second direction;
a length X of the first smooth film layer region in the first directiong1Satisfies the following conditions:
wherein, a1And a2Is a constant, and takes the value of 1 or 0; r1Is the radius R of the first arc surface of the bending forming jig in the first direction2The radius of a second arc surface of the bending forming jig in the first direction is shown; theta1Is the angle value of the central angle corresponding to the first arc surface, theta2The angle value of the central angle corresponding to the second arc surface; l is1The length of the upper surface flat area of the bending forming jig in the first direction;
a length Y of the first smooth film region in a second directiong1Satisfies the following conditions: l is2≤Yg1≤Yc1，
Wherein, Yc1Is the length of the first substrate film region in the second direction, L2The length of the upper surface flat area of the bending forming jig in the second direction;
the second smooth film-layer region is not bent in a first direction and the second smooth film-layer region is to be bent in a second direction;
a length X of the second smooth film layer region in the first directiong2Satisfies the following conditions: l is1≤Xg2≤Xc2，
Wherein, Xc2Is the length of the second substrate film region in the first direction, L1The length of the upper surface flat area of the bending forming jig in the first direction;
a length Y of the second smooth shank region in the second directiong2Satisfies the following conditions:
wherein, a3And a4Is a constant, and takes the value of 1 or 0; r3Is the radius, R, of the third arc surface of the bending forming jig in the second direction4The radius of a fourth arc surface of the bending forming jig in the second direction is shown; theta3Is the angle value of the central angle, theta, corresponding to the third arc surface4Is the angle value of the central angle corresponding to the fourth arc surface; l is2Is the length of the upper surface flat area of the bending forming jig in the second direction.
In an exemplary embodiment of the present disclosure, the base film layer is completely covered by the smooth film layer.
In an exemplary embodiment of the present disclosure, the thickness of the smooth film layer is 0.001 μm or more and 50 μm or less.
According to one aspect of the present disclosure, a method for manufacturing a flexible carrier film is provided, where the flexible carrier film is configured to bear a display panel and attach to a bending jig when the display panel is attached to a curved cover plate, and the method includes:
providing a base film layer;
and forming a smooth film layer on one surface of the substrate film layer, which is close to the bending forming 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 region of the substrate film layer, which is attached to the bending forming jig.
According to the technical scheme, the invention has at least one of the following advantages and positive effects:
the flexible carrier film comprises a base film layer and a smooth film layer, wherein the smooth film layer is arranged on one surface of the base film layer close to the bending forming jig, the friction coefficient of the smooth film layer is smaller than that of the base film layer, and the smooth film layer at least covers the area, attached to the bending forming jig, of the base film layer. The friction coefficient of smooth rete is less, can increase the relative displacement between flexible carrier film and the bending forming tool in the pressfitting in-process, extrudes the air between flexible carrier film and the display panel away to reduce laminating bubble between flexible carrier film and the display panel etc. bad.
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 structural diagram of an embodiment of a flexible carrier film of the present invention cut from a first direction for circular arc surface attachment;
FIG. 2 is a schematic structural view of another embodiment of the flexible carrier film of the present invention cut from a second direction for circular arc surface lamination;
FIG. 3 is a schematic structural view of a first embodiment of a flexible carrier film according to the present invention;
FIG. 4 is a schematic structural view of a second embodiment of a flexible carrier film according to the present invention;
FIG. 5 is a schematic structural view of a third embodiment of a flexible carrier film according to the present invention;
FIG. 6 is a schematic structural view of a fourth embodiment of a flexible carrier film according to the present invention;
FIG. 7 is a schematic diagram of the structure and dimensioning of the base film layer of FIGS. 5 and 6;
FIG. 8 is a schematic illustration of the structure and dimensioning of the smooth film layer of FIG. 5;
FIG. 9 is a schematic illustration of the structure and dimensioning of the smoothing film layer of FIG. 6;
fig. 10 is a schematic structural view of a fifth embodiment of the flexible carrier film of the present invention.
The reference numerals of the main elements in the figures 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 dissipating film; 6. combining the films; 7. bending and forming the jig.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different 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 example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
The invention firstly provides a flexible carrier film, and refers to a structural schematic diagram of a cutting from a first direction of an embodiment of the flexible carrier film for circular arc surface pasting shown in figure 1; the flexible carrier film is configured to carry the display panel 2 and to be attached to the bending jig 7 when the display panel 2 is attached to the curved cover plate 1. In the first direction, the upper surface flat area of the bending forming jig 7 is in the first directionLength is L1The bending forming jig 7 has two arc surfaces, i.e., a first arc surface and a second arc surface, the radius of the first arc surface is R1The angle value of the central angle corresponding to the first arc surface is theta1The radius of the second arc surface is R2The angle value of the central angle corresponding to the second arc surface is theta2。
Referring to a structural schematic diagram of another embodiment of the flexible carrier film for arc surface lamination, which is shown in fig. 2, which is cut from a second direction; a heat dissipation film 5 and a combination film 6 may be further 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 that of the arc surface of the curved surface cover plate 1. In the second direction, the length of the upper surface flat area of the bending forming jig 7 in the second direction is L2The bending forming jig 7 has two arc surfaces, i.e., a third arc surface and a fourth arc surface, and the radius of the third arc surface is R3The angle value of the central angle corresponding to the third arc surface is theta3The radius of the fourth arc surface is R4The angle value of the central angle corresponding to the fourth arc surface is theta4。
The flexible carrier film may include a base film layer 3 and a smooth film layer 4; smooth rete 4 is located the one side that is close to bending forming tool 7 of base member rete 3, and the coefficient of friction of smooth rete 4 is less than the coefficient of friction of base member rete 3, and smooth rete 4 covers the region of base member rete 3 with the laminating of bending forming tool 7 at least.
The flexible carrier film of the present invention is explained in detail by five exemplary embodiments below.
Example embodiment one:
referring to fig. 3, a schematic structural diagram of a first 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 that forms two circular arc surfaces, and the two circular arc surfaces are formed identically, and the two circular arc surfaces are disposed oppositely. The smooth film layer 4 is intended to be bent in a first direction and not bent in a second direction during use, and 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 correspondingly, the second direction may be a width direction or a length direction of the display panel 2.
The base film layer 3 may be rectangular, and the base film layer 3 has two dimensions, i.e., a length X in the first directioncAnd length Y of the second directionc. The smooth film layer 4 is also arranged in a rectangular shape, and the smooth film layer 4 also has two dimensions, namely, a length X in the first directiongAnd length Y of the second directiong。
In the present exemplary embodiment, the length X of the smoothing film layer 4 in the first directiongSatisfies the following conditions:
wherein, a1And a2Is a constant, and takes the value of 1 or 0; r1Is the radius of a first arc surface of the bending forming jig 7 in a first direction, R2The radius of the second arc surface of the bending forming jig 7 in the first direction; theta1Is the angle value of the central angle corresponding to the first arc surface, theta2Is the angle value of the central angle corresponding to the second arc surface, theta 1 and theta2The value of (A) can be 50 degrees, 55 degrees, 60 degrees, 75 degrees, 90 degrees, 100 degrees, 120 degrees and the like; l is1Is the length of the flat area of the upper surface of the bending forming jig 7 in the first direction.
Note that, in the present exemplary embodiment, since the display panel 2 is formed to have two arc surfaces and the two arc surfaces are formed to be the same, a1And a2Is 1, R1And R2Is also equal to theta 1 and theta2The values of (A) are also the same.
Of course, in other exemplary embodiments of the present invention, the display panel 2 may also form a circular arc surface, in which case, a1Or a2One of which takes the value 0. The display panel 2 may also be formed with two different circular arc surfaces, in which case a1And a2Is 1, R1And R2Value ofNot the same, θ 1 and θ2The values of (A) are also different.
In the present exemplary embodiment, the length Y of the smoothing film layer 4 in the second directiongSatisfies the following conditions:
L2≤Yg≤Yc。
wherein, YcIs the length of the base film layer 3 in the second direction, L2Is the length of the flat area of the upper surface of the bending forming jig 7 in the second direction.
In the present exemplary embodiment, the thickness of the smoothing 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, in order 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 separately drawn, and do not represent that the smooth film layer 4 and the base film layer 3 are separately disposed.
In the present exemplary embodiment, the flexible carrier film is used for carrying the display panel 2 which forms one arc surface or two arc surfaces, and the two arc surfaces are oppositely arranged, and the two arc surfaces may be the same or different. The smooth film layer 4 is intended to be curved in a first direction and not curved 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 correspondingly, the second direction may be a width direction or a length direction of the display panel 2. The base film layer 3 may be rectangular, and the base film layer 3 has two dimensions, i.e., a length X in the first directioncAnd length Y of the second directionc. The smooth film layer 4 is also arranged in a rectangular shape, and the smooth film layer 4 also has two dimensions, namely, a length X in the first directiongAnd length Y of the second directiong. The smooth film layer 4 completely covers the base film layer 3, i.e. the smooth film layer 4 has the same size as the base film layer 3, Xc＝XgAnd Y isg＝Yc。
In the present exemplary embodiment, the thickness of the smoothing 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 diagram 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 that forms three circular arc surfaces, wherein two circular arc surfaces are formed in the first direction, the two circular arc surfaces are identical and are 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 correspondingly, the second direction may be a width direction or a length direction of the display panel 2.
Referring to the structure and dimension of the base film layer shown in fig. 7; the base film layer 3 is arranged in an orthogonal cross shape, the base film layer 3 comprises a rectangular first base film layer region 31 and a rectangular second base film layer region 32, and the first base film layer region 31 and the second base film layer region 32 are crossed to form the orthogonal cross shape. The first substrate film region 31 has two dimensions, namely a length X in the first directionc1And length Y of the second directionc1. The second substrate film region 32 has two dimensions, length X in the first directionc2And length Y of the second directionc2. Referring to fig. 8, a schematic diagram of the structure and the dimension of the smooth film layer in fig. 5 is shown; the smooth film layer 4 comprises 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 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 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 smoothing film layer 4 is provided in a T-shape. The first smooth film layer 41 has two dimensions, namely a length X in the first directiong1And length Y of the second directiong1. The second smooth film layer 42 has two dimensions, namely a length X in the first directiong2And length Y of the second directiong2。
In the present exemplary embodiment, the first smooth film layer 41 is bent in the first direction and is not bent in the second direction when in use.
The length X of the first smooth film layer 41 in the first directiong1Satisfies the following conditions:
wherein, a1And a2Is a constant, and takes the value of 1 or 0; r1Is the radius of a first arc surface of the bending forming jig 7 in a first direction, R2The radius of the second arc surface of the bending forming jig 7 in the first direction; theta1Is the angle value of the central angle corresponding to the first arc surface, theta2Is the angle value of the central angle corresponding to the second arc surface, theta 1 and theta2The value of (A) can be 50 degrees, 55 degrees, 60 degrees, 75 degrees, 90 degrees, 100 degrees, 120 degrees and the like; l is1Is the length of the flat area of the upper surface of the bending forming jig 7 in the first direction.
Note that, in the present exemplary embodiment, since the display panel 2 is to form two arc surfaces in the first direction and the two arc surfaces are the same, a1And a2Is 1, R1And R2Is also equal to theta 1 and theta2The values of (A) are also the same.
Of course, in other exemplary embodiments of the present invention, the display panel 2 may form a circular arc surface in the first direction, in which case, a1Or a2One of which takes the value 0. The display panel 2 may also be formed with two different circular arc surfaces, in which case a1And a2Is 1, R1And R2Are different in value, theta 1 and theta2The values of (A) are also different.
In the present exemplary embodiment, the length Y of the first smooth film layer 41 in the second directiong1Satisfies the following conditions: l is2≤Yg1≤Yc1。
Wherein, Yc1Is the length of the first substrate film region 31 in the second direction, L2Is the upper surface of the bending forming jig 7A length of the face flat region in the second direction.
In the present exemplary embodiment, the second smooth film layer 42 is not bent in the first direction in use, and the second smooth film layer 42 is to be bent in the second direction;
the length X of the second smooth film layer 42 in the first directiong2Satisfies the following conditions: l is1≤Xg2≤Xc2。
Wherein, Xc2Is the length of the second substrate film region 32 in the first direction, L1Is the length of the flat area of the upper surface of the bending forming jig 7 in the first direction.
Length Y of second smooth film layer 42 in second directiong2Satisfies the following conditions:
wherein R is3Is the radius theta of the third arc surface of the bending forming jig 7 in the second direction3Is the angle value of the central angle, theta, corresponding to the third arc surface3The value of (A) can be 50 degrees, 55 degrees, 60 degrees, 75 degrees, 90 degrees and the like, and L2Is the length of the upper surface flat area of the bending forming jig 7 in the second direction, Yg1Is the length of the first slip film layer 41 in the second direction.
In addition, R is3Can be selected from the group consisting of1Or R2The values of (A) may be the same or different. Theta3Can take on a value corresponding to theta 1 or theta2The values of (A) may be the same or different.
In the present exemplary embodiment, the thickness of the smoothing 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 diagram 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 that forms four arc surfaces, wherein two identical and opposite arc surfaces are formed in the first direction and two identical and opposite 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 correspondingly, the second direction may be a width direction or a length direction of the display panel 2.
Referring to the structure and dimension of the base film layer shown in fig. 7; the base film layer 3 is arranged in an orthogonal cross shape, the base film layer 3 comprises a rectangular first base film layer region 31 and a rectangular second base film layer region 32, and the first base film layer region 31 and the second base film layer region 32 are crossed to form an orthogonal cross shape; the first substrate film region 31 has two dimensions, namely a length X in the first directionc1And length Y of the second directionc1. The second substrate film region 32 has two dimensions, length X in the first directionc2And length Y of the second directionc2. Referring to fig. 9, the structure and dimensioning of the smoothing film layer in fig. 6 is schematically illustrated; the smooth film layer 4 comprises 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 crossed to form an orthogonal cross, the first smooth film layer area 43 is positioned in the first base film layer area 31, and two ends of the second smooth film layer area 44 extend into the second base film layer area 32, namely, the base film layer and the smooth film layer 4 are arranged coaxially. The first smooth film-layer region 43 has two dimensions, namely a length X in the first directiong1And length Y of the second directiong1. The second smooth film-layer region 44 has two dimensions, namely a length X in the first directiong2And length Y of the second directiong2。
In the present example embodiment, the first smooth layer region 43 is intended to be bent in a first direction and not bent in a second direction during use.
The length X of the first smooth film-layer region 43 in the first directiong1Satisfies the following conditions:
wherein, a1And a2Is a constant, and takes the value of 1 or 0; r1Is a bending forming dieRadius of first circular arc surface with 7 in first direction, R2The radius of the second arc surface of the bending forming jig 7 in the first direction; theta1Is the angle value of the central angle corresponding to the first arc surface, theta2Is the angle value of the central angle, theta, corresponding to the second arc surface1And theta2The value of (A) can be 50 degrees, 55 degrees, 60 degrees, 75 degrees, 90 degrees, 100 degrees, 120 degrees and the like; l is1Is the length of the flat area of the upper surface of the bending forming jig 7 in the first direction.
Note that, in the present exemplary embodiment, since the display panel 2 is to form two arc surfaces in the first direction and the two arc surfaces are the same, a1And a2Is 1, R1And R2Is also equal to theta 1 and theta2The values of (A) are also the same.
Of course, in other exemplary embodiments of the present invention, the display panel 2 may also form two different arc surfaces in the first direction, in which case, a1And a2Is 1, R1And R2Are not the same as theta1And theta2The values of (A) are also different.
In the present exemplary embodiment, the length Y of the first smooth film layer in the second directiong1Satisfies the following conditions: l is2≤Yg1≤Yc1。
Wherein, Yc1Is the length of the first substrate film region 31 in the second direction, L2Is the length of the flat area of the upper surface of the bending forming jig 7 in the second direction.
In the present example embodiment, the second smooth shank region 44 is not bent in the first direction and is bent in the second direction in use.
The length X of the second smooth film-layer region 44 in the first directiong2Satisfies the following conditions: l is1≤Xg2≤Xc2。
Wherein, Xc2Is the length of the second substrate film region 32 in the first direction, L1Is the length of the flat area of the upper surface of the bending forming jig 7 in the first direction.
Second smoothnessThe length Y of the membrane region 44 in the second directiong2Satisfies the following conditions:
wherein, a3And a4Is a constant, and takes the value of 1 or 0; r3Is the radius, R, of the third arc surface of the bending forming jig 7 in the second direction4Is the radius of a fourth arc surface of the bending forming jig 7 in the second direction; theta3Is the angle value of the central angle, theta, corresponding to the third arc surface4Is the angle value of the central angle, theta, corresponding to the fourth arc surface3And theta4The value of (A) can be 50 degrees, 55 degrees, 60 degrees, 75 degrees, 90 degrees, 100 degrees, 120 degrees and the like; l is2Is the length of the flat area of the upper surface of the bending forming jig 7 in the second direction.
Note that, in the present exemplary embodiment, since the display panel 2 is to form two arc surfaces in the second direction and the two arc surfaces are the same, a3And a4Is 1, R3And R4Is also equal in value of theta3And theta4The values of (A) are also the same.
Of course, in other exemplary embodiments of the present invention, the display panel 2 may also form two different arc surfaces in the second direction, in which case, a3And a4Is 1, R3And R4Are not the same as theta3And theta4The values of (A) are also different. Four different arc surfaces can also be formed, and at the moment, R is1、R2、R3And R4Are all different in value, theta1、θ2、θ3And theta4The values of (A) are also different. Of course, any two of the same or any three of the same arc surfaces may also be formed, which are not described herein.
In the present exemplary embodiment, the thickness of the smoothing 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 diagram of a fifth embodiment of the flexible carrier film of the present invention is shown. For clarity of the magnitude 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 separately drawn and do not represent that the smooth film layer 4 and the base film layer 3 are separately disposed.
In the present exemplary embodiment, the flexible carrier film is used to carry the display panel 2 that forms four arc surfaces, wherein two identical and opposite arc surfaces are formed in the first direction and two identical and opposite 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 correspondingly, the second direction may be a width direction or a length direction of the display panel 2.
The base film layer 3 is arranged in an orthogonal cross shape, the base film layer 3 comprises a rectangular first base film layer region 31 and a rectangular second base film layer region 32, and the first base film layer region 31 and the second base film layer region 32 are crossed to form an orthogonal cross shape; the first substrate film region 31 has two dimensions, namely a length X in the first directionc1And length Y of the second directionc1. The second substrate film region 32 has two dimensions, length X in the first directionc2And length Y of the second directionc2. The smooth film layer 4 includes a rectangular first smooth film-layer region 43 and a rectangular second smooth film-layer region 44, the second smooth film-layer region 44 intersecting the first smooth film-layer region 43 to form an orthogonal cross. The first smooth film-layer region 43 has two dimensions, namely a length X in the first directiong1And length Y of the second directiong1. The second smooth film-layer region 44 has two dimensions, namely a length X in the first directiong2And length Y of the second directiong2. 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. Xc1＝Xg1，Yc1＝Yg1，Xc2＝Xg2，Yc2＝Yg2。
It should be noted that the smooth film layer 4 completely covers the base film layer 3, that is, the smooth film layer 4 has the same size as the base film layer 3, and is suitable for forming any number of circular arc surfaces and any size.
In the present exemplary embodiment, the thickness of the smoothing 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, the flexible carrier film is configured to bear the display panel 2 and attach the display panel 2 to the curved cover plate 1 when the display panel 2 is attached to the curved cover plate 1, and the method for preparing the flexible carrier film may include the following steps:
in step S10, the base film layer 3 is provided.
Step S20, forming a smooth film layer 4 on one surface of the substrate film layer 3 close to the bending forming jig 7, wherein 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 forming jig 7.
The specific structures of the base film layer 3 and the smooth film layer 4 have been described in detail above, and therefore, the detailed description thereof is omitted.
The material of the substrate 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, organic or inorganic materials for preparing the smooth film layer 4 can be added into the raw stock for preparing the base film layer 3 to form a new flexible bearing film, and the friction coefficient of the new flexible bearing film can also be reduced.
The module process flow of the OLED flexible screen can refer to the process flow known in the industry, and the front and back sequence of each process can be replaced: COP/COF bonding → FOP/FOF bonding → Bending area glue application → bonding area glue application and positive glue → bonding of the combined film 6 (touch screen, polarizer and OCA optical glue layer, etc.) on the display panel 2 → shaped cutting and chamfering → back film removal → flexible carrier film bonding → cover plate bonding → heat sink Sheet (SCF) bonding → Pad bonding.
Wherein, the flow of apron laminating can divide into: attaching the flexible carrier film to the display panel 2 → placing in an attaching device (vacuum environment) → holding the four sides of the flexible carrier film → moving the bending jig 7 upward to attach the display panel 2 to the cover plate → applying pressure and holding for a certain time → releasing the vacuum, and taking out the display panel 2.
The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments, and the features discussed in connection with the embodiments are interchangeable, if possible. 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 may 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" as used herein generally mean within 20%, preferably within 10%, and more preferably within 5% of a given value or range. The amounts given herein are approximate, meaning that the meaning of "about", "approximately" or "approximately" may still be implied without specific recitation.
Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". 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 via another structure.
In this specification, the terms "a", "an", "the" and "the" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and are not limiting on the number of their objects.
It is to 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 description. The invention is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications fall within the scope of the present invention. It will 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 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 utilize the invention.
Claims (10)
1. The utility model provides a flexible carrier film, is configured to bear when laminating display panel and curved surface apron display panel and with the laminating of bending forming tool, its characterized in that, flexible carrier film includes:
a base film layer;
the smooth film layer is arranged on one surface, close to the bending forming jig, of the base body film layer, the friction coefficient of the smooth film layer is smaller than that of the base body film layer, and the smooth film layer at least covers the area, attached to the bending forming jig, of the base body film layer.
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 to be flexed in a second direction;
the length of the smooth film layer in the first direction satisfies:
wherein, a1And a2Is a constant, and takes the value of 1 or 0; r1Is the radius R of the first arc surface of the bending forming jig in the first direction2The radius of a second arc surface of the bending forming jig in the first direction is shown; theta1Is the angle value of the central angle corresponding to the first arc surface, theta2The angle value of the central angle corresponding to the second arc surface; l is1The length of the upper surface flat area of the bending forming jig in the first direction;
the length Y of the smooth film layer in the second directiongSatisfies the following conditions: l is2≤Yg≤Yc，
Wherein, YcIs the length of the base film layer in the second direction, L2Is the length of the upper surface flat area of the bending forming jig in the second direction.
4. The carrier film of claim 1, wherein the base film layer comprises a rectangular first base film layer region and a rectangular second base film layer region, the first base film layer region and the second base film layer region criss-crossing to form an orthogonal cross;
the smooth film layer comprises a rectangular first smooth film layer and a rectangular second smooth film layer, the first smooth film layer is located in the first substrate film layer region, and the second smooth film layer is spliced on one side of the first smooth film layer and extends into the second substrate film layer region.
5. The carrier film of claim 4, wherein the first lubricious film layer is to be flexed in a first direction and the first lubricious film layer is not to be flexed in a second direction;
a length X of the first smooth film layer in the first directiong1Satisfies the following conditions:
wherein, a1And a2Is a constant, and takes the value of 1 or 0; r1Is the radius R of the first arc surface of the bending forming jig in the first direction2The radius of a second arc surface of the bending forming jig in the first direction is shown; theta1Is the angle value of the central angle corresponding to the first arc surface, theta2The angle value of the central angle corresponding to the second arc surface; l is1The length of the upper surface flat area of the bending forming jig in the first direction;
the length Y of the first smooth film layer in the second directiong1Satisfies the following conditions: l is2≤Yg1≤Yc1，
Wherein, Yc1Is the length of the first substrate film region in the second direction, L2The length of the upper surface flat area of the bending forming jig in the second direction;
the second lubricious film layer is not curved in a first direction and the second lubricious film layer is to be curved in a second direction;
the length X of the second smooth film layer in the first directiong2Satisfies the following conditions: l is1≤Xg2≤Xc2，
Wherein, Xc2Is the length of the second substrate film region in the first direction, L1The length of the upper surface flat area of the bending forming jig in the first direction;
a length Y of the second smooth film layer in the second directiong2Satisfies the following conditions:
wherein R is3Is the radius theta of the third arc surface of the bending forming jig in the second direction3Is the angle value, L, of the central angle corresponding to the third arc surface2Is the length of the upper surface flat area of the bending forming jig in the second direction, Yg1Is the length of the first lubricious film layer in the second direction.
6. The carrier film of claim 1, wherein the base film layer comprises a rectangular first base film layer region and a rectangular second base film layer region, the first base film layer region and the second base film layer region criss-crossing to form an orthogonal cross;
the smooth film layer comprises a rectangular first smooth film layer region and a rectangular second smooth film layer region, the second smooth film layer region and the first smooth film layer region are crossed to form an orthogonal cross, the first smooth film layer region is located in the first base film layer region, and two ends of the second smooth film layer region extend into the second base film layer region.
7. The carrier film of claim 6, wherein the first smooth film-layer region is to be bent in a first direction and the first smooth film-layer region is not to be bent in a second direction;
a length X of the first smooth film layer region in the first directiong1Satisfies the following conditions:
wherein, a1And a2Is a constant, and takes the value of 1 or 0; r1Is the radius R of the first arc surface of the bending forming jig in the first direction2The radius of a second arc surface of the bending forming jig in the first direction is shown; theta1Is thatThe angle value of the central angle theta corresponding to the first arc surface2The angle value of the central angle corresponding to the second arc surface; l is1The length of the upper surface flat area of the bending forming jig in the first direction;
a length Y of the first smooth film region in a second directiong1Satisfies the following conditions: l is2≤Yg1≤Yc1，
Wherein, Yc1Is the length of the first substrate film region in the second direction, L2The length of the upper surface flat area of the bending forming jig in the second direction;
the second smooth film-layer region is not bent in a first direction and the second smooth film-layer region is to be bent in a second direction;
a length X of the second smooth film layer region in the first directiong2Satisfies the following conditions: l is1≤Xg2≤Xc2，
Wherein, Xc2Is the length of the second substrate film region in the first direction, L1The length of the upper surface flat area of the bending forming jig in the first direction;
a length Y of the second smooth shank region in the second directiong2Satisfies the following conditions:
wherein, a3And a4Is a constant, and takes the value of 1 or 0; r3Is the radius, R, of the third arc surface of the bending forming jig in the second direction4The radius of a fourth arc surface of the bending forming jig in the second direction is shown; theta3Is the angle value of the central angle, theta, corresponding to the third arc surface4Is the angle value of the central angle corresponding to the fourth arc surface; l is2Is the length of the upper surface flat area of the bending forming jig in the second direction.
8. The carrier film of any one of claims 1 to 7, wherein the smooth film layer completely covers the base film layer.
9. The carrier film of claim 8, wherein the thickness of the smooth film layer is greater than or equal to 0.001 μm and less than or equal to 50 μm.
10. A preparation method of a flexible bearing film is provided, the flexible bearing film is configured to bear a display panel and be attached to a bending forming jig when the display panel is attached to a curved cover plate, and the preparation method of the flexible bearing film is characterized by comprising the following steps:
providing a base film layer;
and forming a smooth film layer on one surface of the substrate film layer, which is close to the bending forming 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 region of the substrate film layer, which is attached to the bending forming jig.
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