CN114446155A - Four-side curved flexible screen, display terminal and laminating method of display terminal - Google Patents

Four-side curved flexible screen, display terminal and laminating method of display terminal Download PDF

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Publication number
CN114446155A
CN114446155A CN202011204917.5A CN202011204917A CN114446155A CN 114446155 A CN114446155 A CN 114446155A CN 202011204917 A CN202011204917 A CN 202011204917A CN 114446155 A CN114446155 A CN 114446155A
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China
Prior art keywords
curved
flexible screen
substrate
region
thickness
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Granted
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CN202011204917.5A
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Chinese (zh)
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CN114446155B (en
Inventor
李喜烈
岳晗
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Beijing Xiaomi Mobile Software Co Ltd
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Beijing Xiaomi Mobile Software Co Ltd
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Priority to CN202011204917.5A priority Critical patent/CN114446155B/en
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements

Abstract

The application discloses crooked flexible screen in four sides, display terminal and laminating method thereof, wherein, a crooked flexible screen in four sides, including glass apron and flexible panel, crooked flexible screen in four sides is provided with bending region, bending region on the glass apron is provided with the thin district, the thickness in thin district is less than non-bending region's thickness on the glass apron, bending region on the flexible panel is provided with the half-cut district, the thickness in half-cut district is less than non-bending region's thickness on the flexible panel. The flexible screen of four sides song that this application embodiment provided is provided with the thin district through being provided with on glass apron corresponds to the bending area, is provided with the half-cut district on the flexible panel corresponds to the bending area to adapt to different bending radius, prevent to produce bubble or fold scheduling problem when the bending area laminating.

Description

Four-side curved flexible screen, display terminal and laminating method of display terminal
Technical Field
The application generally relates to the technical field of flexible screens, in particular to a four-side curved flexible screen, a display terminal and a laminating method of the display terminal.
Background
With the continuous development of science and technology, various types of electronic equipment are gradually applied to life, study and work of people, and curved surface screens and arc surface screens have wider and wider application range due to good operation and visual effects; the four-side curved screen has no frame on the four sides and is attractive. Screens with large bending radius and small bending depth are already produced in mass production. However, for CG (cover glass) having a bending radius R of less than 3mm and a bending angle of 90 ° or more, the flexible screen is pressed against the inner side of the glass cover glass by the current Gel-Pad bonding method, and generally using a silica Gel Pad in the prior art.
However, in the conventional bonding method, bubbles or wrinkles are likely to be formed between CG and panel, as shown in fig. 1. This is because it is difficult to control the contact sequence between the Gel-pad and the CG by the Gel-pad bonding. Deformation of the Gel-pad itself causes premature contact of the CG side surfaces, resulting in relatively large stress on the Panel, resulting in failure of the fit.
Disclosure of Invention
In view of the foregoing defects or shortcomings in the prior art, it is desirable to provide a four-sided curved flexible screen, a display terminal and a bonding method thereof, which can simplify the bonding process and avoid bonding failure.
On the one hand, this application provides a flexible screen of four sides song, including glass apron and flexible panel, the flexible screen of four sides song is provided with bending area, bending area on the glass apron is provided with the thin district, the thickness in thin district is less than the thickness in non-bending area on the glass apron, bending area on the flexible panel is provided with the half-cut district, the thickness in half-cut district is less than the thickness in non-bending area on the flexible panel.
Furthermore, the four-side curved flexible screen comprises a first plane and a second plane, the first plane and the second plane are smoothly connected through a first curved surface, and the thinned area and the half-cut area correspond to the first curved surface respectively in position.
Furthermore, the glass cover plate comprises a glass substrate and an organic layer arranged on the lower layer of the glass substrate, the thinning area is arranged on the glass substrate, and the thinning area is filled with organic materials.
Further, the glass substrate comprises a first plane substrate forming the first plane, a second plane substrate forming the second plane, and a first curved substrate forming the first curved surface, wherein the first plane substrate, the second plane substrate, and the first curved substrate are integrally formed.
Further, the thinning area is arranged on the first curved substrate, and the thickness of the glass substrate on the thinning area is smaller than the thickness of the first planar substrate and the second planar substrate.
Further, the flexible panel comprises a base layer, wherein the upper layer of the base layer is a polarizer layer, and the two layers are fixedly connected through optical cement; the lower layer of the base layer is a back plate supporting layer, and the two layers are fixedly connected through a pressure-sensitive adhesive.
Further, the half-cut region is disposed on the back plate supporting layer, and the half-cut region penetrates through the back plate supporting layer.
Furthermore, four end points of the glass cover plate are provided with first avoidance areas, the first avoidance areas are provided with first fillets at the end points close to the first plane base body, and the circle centers of the first fillets are close to the first plane base body.
Furthermore, the flexible panel is provided with a second avoidance area at a position corresponding to the first avoidance area, a second fillet is arranged at a position corresponding to the first fillet, and the direction of the second fillet is the same as that of the first fillet.
In another aspect, the present invention provides a display terminal, wherein the four-side curved flexible screen is disposed on the display terminal.
In another aspect, the invention provides a four-side curved flexible screen attaching method, which includes:
fixedly connecting the glass cover plate and the flexible panel through optical cement, and performing plane pressing;
and fixing the fitted component on the rigid prosthesis to form a four-curved shape.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
the flexible screen of four sides song that this application embodiment provided is provided with the thin district through being provided with on glass apron corresponds to the bending area, is provided with the half-cut district on the flexible panel corresponds to the bending area to adapt to different bending radius, prevent to produce bubble or fold scheduling problem when the bending area laminating.
According to the method for laminating the four-side curved flexible screen, the glass cover plate and the flexible panel are laminated in a planar state and then are bent and formed; the laminating process can be simplified, laminating failure is avoided, and the defect of low laminating yield of the conventional flexible curved screen is overcome.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic illustration of a prior art defect occurring between a glass cover plate and a flexible panel;
fig. 2 is a schematic structural diagram of a glass cover plate according to an embodiment of the present disclosure;
FIG. 3 is a cross-sectional view of a glass cover plate at the location of a thinned zone provided by an embodiment of the present application;
fig. 4 is a schematic structural diagram of a flexible panel provided in an embodiment of the present application;
FIG. 5 is a cross-sectional view of a flexible panel at a half-cut location provided by an embodiment of the present application;
fig. 6 is a schematic structural diagram of a four-side curved flexible screen according to an embodiment of the present application.
Wherein the content of the first and second substances,
1. a glass cover plate; 2. a flexible panel; 301. a first plane; 302. a second plane; 303. a first curved surface; 11. a glass substrate; 12. an organic layer; 13. a thinning zone; 101. a first planar substrate; 102. a second planar substrate; 103. a first curved substrate; 104. a first avoidance zone; 105. a first fillet; 21. a base layer; 22. a polarizer layer; 23. a back plate support layer; 24. optical cement; 25. a pressure sensitive adhesive; 26. a half-cut region; 201. a first planar substrate; 202. a second planar substrate; 203. a first curved substrate; 204. a second avoidance zone; 205. a second fillet; 4. a rigid prosthesis.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Please refer to fig. 1-4 in detail, in one aspect, the present application provides a four-sided curved flexible screen, which includes a glass cover plate 1 and a flexible panel 2, wherein the four-sided curved flexible screen is provided with a curved region, a thinned region 13 corresponding to the curved region is disposed on the glass cover plate 1, a half-cut region 26 corresponding to the curved region is disposed on the flexible panel 2, a thickness of the thinned region is smaller than a thickness of a non-curved region on the glass cover plate, and a thickness of the half-cut region is smaller than a thickness of a non-curved region on the flexible panel.
The four-surface curved flexible screen comprises a first plane 301 and a second plane 302, the first plane 301 and the second plane 302 are smoothly connected through a first curved surface 303, and the thinned area and the half-cut area correspond to the first curved surface respectively; namely, the thinning area and the half-cut area are both formed on the first curved surface.
The glass cover plate comprises a glass substrate 11 and an organic layer 12 arranged on the lower layer of the glass substrate 11, the thinning area is arranged on the glass substrate, and the thinning area is filled with organic materials. The glass substrate comprises a first plane substrate 101 forming the first plane 301, a second plane substrate 102 forming the second plane 302, and a first curved substrate 103 forming the first curved surface 303, wherein the first plane substrate, the second plane substrate, and the first curved substrate are integrally formed.
Further, the thinned area is arranged on the first curved substrate, and the thickness of the thinned area is smaller than that of the first planar substrate and that of the second planar substrate.
The flexible panel comprises a base layer, wherein the upper layer of the base layer is a polarizer layer, and the two layers are fixedly connected through optical cement; the lower layer of the base layer is a back plate supporting layer, and the two layers are fixedly connected through a pressure-sensitive adhesive. Further, the half-cut region is disposed on the back plate supporting layer, and the half-cut region penetrates through the back plate supporting layer.
In addition, four end points of the glass cover plate 1 are provided with first avoidance areas 104, the first avoidance areas 104 are provided with first rounded corners 105 at the end points close to the first planar substrate 101, and the circle centers of the first rounded corners 105 are close to the first planar substrate 101. The flexible panel 2 is provided with a second avoidance area 204 at a position corresponding to the first avoidance area 104, and is provided with a second fillet 205 at a position corresponding to the first fillet 105, and the direction of the second fillet is the same as the direction of the first fillet.
It should be noted that, the four corners of the glass cover plate are respectively cut to avoid, because the glass cover plate is bent and folded to form a tetrahedron structure, one piece is cut at the corner position to prevent the two sides formed during folding from interfering.
In another aspect, the invention provides a display terminal, wherein the four-side curved flexible screen is arranged on the display terminal.
In another aspect, the invention provides a four-side curved flexible screen laminating method, which comprises the following steps:
fixedly connecting the glass cover plate and the flexible panel through optical cement, and performing plane pressing;
and fixing the fitted component on the rigid prosthesis to form a four-side curved shape.
Example one
As shown in fig. 2 and 3, a glass cover plate 1 includes a glass substrate 11 and an organic layer 12 disposed below the glass substrate, wherein a thinned region 13 is disposed on the glass substrate 11, and the thinned region 13 is filled with an organic material. The glass substrate 11 comprises a first planar substrate 101, a second planar substrate 102 and a first curved substrate 103 connecting the first planar substrate 101 and the second planar substrate 102, wherein the first planar substrate 101, the second planar substrate 102 and the first curved substrate 103 are integrally formed.
The first flat substrate is located in the middle of the glass cover plate and used for forming a straight area of the main surface of the four-curved flexible screen, the second flat substrate is located at four sides of the glass cover plate and used for forming a straight area of the side surface of the four-curved flexible screen, and the first curved substrate is located in a connection area of the first flat substrate and the second flat substrate and used for forming a bending area of the four-curved flexible screen.
Four end points of the glass cover plate are provided with first avoidance areas 104, the first avoidance areas are provided with first fillets 105 at the end points close to the first plane base body, and the circle centers of the first fillets are close to the first plane base body. When the fillet is used for forming the four-side curved flexible screen, smooth transition is carried out.
FIG. 2 is a schematic structural diagram of a glass cover plate according to an embodiment of the present disclosure; FIG. 3 is a cross-sectional view of a glass cover plate at a thinning zone according to an embodiment of the present application; as shown in fig. 3, the thinned region 13 is disposed on the first curved substrate, the thickness of the thinned region glass substrate 11 is smaller than the thickness of the first planar substrate and the second planar substrate, and the dashed area in fig. 2 is the thinned region.
The thinned area is disposed on the first curved substrate, but the width of the thinned area is not specifically limited to be the same as the width of the first curved substrate, and the thinned area is specifically disposed according to different application scenarios or different bending radii when the thinned area is specifically disposed.
In a specific arrangement, the details of the design of the glass cover plate are as follows:
non-thinned area thickness: 0.1 mm-0.5 mm
Width of the thinning zone: more than 3.14 mm;
thickness of the thinning zone: less than 0.07 mm;
thickness of organic layer: over 0.07 mm;
OCA is adhered on the organic layer, and the viscosity of OCA is more than 5N/inch.
Example two
As shown in fig. 4 to 5, the flexible panel 2 includes a first planar substrate 201, a second planar substrate 202, and a first curved substrate 203 connecting the first planar substrate 201 and the second planar substrate 202, and the first planar substrate, the second planar substrate, and the first curved substrate are integrally formed.
It should be noted that the first planar substrate is located in the middle of the flexible panel and is used for forming a flat area of the main surface of the four-sided curved flexible screen, the second planar substrate is located in four sides of the flexible panel and is used for forming a flat area of the side surface of the four-sided curved flexible screen, and the first curved substrate is located in a connection area between the first planar substrate and the second planar substrate and is used for forming a bending area of the four-sided curved flexible screen.
As shown in fig. 5, the flexible panel includes a base layer 21, an upper layer of the base layer 21 is a polarizer layer 22, and the two layers are fixedly connected through an optical adhesive 24; the lower layer of the base layer 21 is a back plate supporting layer 23, and the two layers are fixedly connected through a pressure sensitive adhesive 25. Further, the half-cut region 26 is disposed on the back plate supporting layer 23, the half-cut region penetrates through the back plate supporting layer, a blank region is formed after the back supporting layer is penetrated and cut, a dotted line region in fig. 4 is a half-cut region, and a hollow white region in fig. 5 is a half-cut region. The left and right half-cut regions 26 in fig. 5 correspond to the left and right half-cut regions formed at the first curved surfaces 203 in fig. 4, respectively.
The half-cut region is provided on the first curved substrate, but the width thereof is not specifically limited to be the same as the width of the first curved substrate, and is specifically set according to different application scenarios or different bending radii, and is generally set to a width of 3.14mm or more.
The position of the back support layer cut from the half-cut region may be a single strip, or a plurality of strip regions may be cut, and the cut shape and the cut position may be different depending on a specific application scenario, a bending radius, and the like.
In addition, four end points of the flexible panel 2 are provided with second avoidance zones 204, the second avoidance zones 204 are provided with second fillets 205 at the end points close to the first planar substrate 201, and the centers of the second fillets 205 are close to the first planar substrate 201. When the fillet is used for forming the four-side curved flexible screen, smooth transition is carried out.
EXAMPLE III
As shown in fig. 5, a method for attaching a four-sided flexible screen includes:
fixedly connecting the glass cover plate and the flexible panel through optical cement, and performing plane pressing;
and fixing the fitted component on the rigid prosthesis to form a four-side curved shape.
The prosthesis is made of rigid materials and is used for fixedly forming the glass cover plate and the flexible panel after being combined to form a four-side curved shape. In particular implementation, the rigid prosthesis 4 may be a mold of a machining tool, or may be an internal support material of a flexible screen, the outer surface of which is shaped in a four-sided curved shape to be formed.
The optical cement is OCA optical cement. The OCA (optical Clear Adhesive) is a double-sided Adhesive tape without a base material, which is prepared by making an optical acrylic Adhesive into a non-base material, and then respectively attaching a layer of release film (protective film) on an upper bottom layer and a lower bottom layer, and has the characteristics of no color, transparency, light transmittance of over 90 percent, good bonding strength, capability of being cured at room temperature or middle temperature, small curing shrinkage and the like.
When specifically adding man-hour, pass through the fixed back of optical cement with glass apron and flexible panel, carry out the plane pressfitting through laminating gyro wheel or other compression fittings, make the two attached even, avoid the laminating failure, overcome the defect that current flexible curved surface screen laminating yield is low.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "disposed" and the like, as used herein, may refer to one element being directly attached to another element or one element being attached to another element through intervening elements. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.
The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the scope of the described embodiments. It will be appreciated by those skilled in the art that many variations and modifications may be made to the teachings of the invention, which fall within the scope of the invention as claimed.

Claims (11)

1. The utility model provides a four-side-curved flexible screen, includes glass apron and flexible panel, its characterized in that, four-side-curved flexible screen is provided with crooked region, crooked region on the glass apron is provided with thinization district, the thickness in thinization district is less than the thickness in the crooked region on the glass apron, crooked region on the flexible panel is provided with the half-cut district, the thickness in half-cut district is less than the thickness in the crooked region on the flexible panel.
2. A four-sided flexible screen as recited in claim 1, wherein the four-sided flexible screen includes a first planar surface and a second planar surface, the first planar surface and the second planar surface being smoothly connected by a first curved surface, the thinned region and the half-cut region each corresponding in position to the first curved surface.
3. The four-sided flexible screen of claim 2, wherein the glass cover plate comprises a glass substrate and an organic layer disposed under the glass substrate, the thinned region is disposed on the glass substrate, and the thinned region is filled with an organic material.
4. The four-sided flexible screen of claim 2, wherein the glass substrate comprises a first planar substrate forming the first planar surface, a second planar substrate forming the second planar surface, and a first curved substrate forming the first curved surface, the first planar substrate, the second planar substrate, and the first curved substrate being integrally formed.
5. The four-sided flexible screen of claim 4, wherein the thinned region is disposed on the first curved substrate, the thinned region having a thickness of the glass substrate that is less than a thickness of the first planar substrate and the second planar substrate.
6. The four-sided curved flexible screen of claim 1, wherein the flexible panel comprises a base layer, wherein the upper layer of the base layer is a polarizer layer, and the two layers are fixedly connected through an optical adhesive; the lower layer of the base layer is a back plate supporting layer, and the two layers are fixedly connected through a pressure-sensitive adhesive.
7. The four-sided flexible screen of claim 6, wherein the half-cut regions are disposed in the backing support layer, the half-cut regions extending through the backing support layer.
8. The four-sided flexible screen of claim 2, wherein a first relief area is provided at each of four end points of the glass cover plate, wherein the first relief area is provided with a first rounded corner at an end point close to the first planar substrate, and wherein the center of the first rounded corner is close to the first planar substrate.
9. The four-sided flexible screen of claim 8, wherein the flexible panel is provided with a second avoidance zone at a location corresponding to the first avoidance zone, and a second rounded corner at a location corresponding to the first rounded corner, and wherein the second rounded corner is oriented in the same direction as the first rounded corner.
10. A display terminal, characterized in that the display terminal is provided with the four-sided curved flexible screen according to any one of claims 1 to 9.
11. A method of making a four-sided curved flexible screen according to any one of claims 1 to 9, comprising:
fixedly connecting the glass cover plate and the flexible panel through optical cement, and performing plane pressing;
and fixing the fitted component on the rigid prosthesis to form a four-side curved shape.
CN202011204917.5A 2020-11-02 2020-11-02 Four-side curved flexible screen, display terminal and bonding method thereof Active CN114446155B (en)

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