WO2022011748A1

WO2022011748A1 - Screen assembly and display device

Info

Publication number: WO2022011748A1
Application number: PCT/CN2020/105451
Authority: WO
Inventors: 饶娉
Original assignee: 武汉华星光电半导体显示技术有限公司
Priority date: 2020-07-13
Filing date: 2020-07-29
Publication date: 2022-01-20
Also published as: CN111785167A; CN111785167B

Abstract

A screen assembly and a display device. The screen assembly comprises a cover plate and a flexible panel which are stacked; the peripheral edge of the cover plate is bent towards the flexible panel; the flexible panel comprises a first plane, a bent surface surrounding the first plane, and a second plane connected to the bent surface, wherein the bent surface comprises a first arc-shaped surface and a second arc-shaped surface; the first arc-shaped surface is bent and extends from the edge of the first plane in a bending direction of the edge of the cover plate; and the second arc-shaped surface is formed with a preset radius by bending and extending from the edge of the first arc-shaped surface towards the first plane.

Description

Screen assemblies and display devices

technical field

The present application relates to the field of display technology, and in particular, to a screen assembly and a display device.

Background technique

With the continuous development of display technology, flexible display technology has become the key to the development of the display industry, and flexible display panels have also received full attention and are more and more widely used in various fields, such as the terminal field.

At present, the most common terminal screen on the market is generally a 3D glass cover that is curved on both sides, that is, the left and right sides of the screen are curved. 180-degree bending, however, with the advent of the four-sided curved screen, this conventional panel cannot be applied to the four-sided curved screen, which causes great difficulties in the mass production of the terminal.

technical problem

The present application provides a screen assembly and a display device to solve the technical problem that the existing panel cannot be applied to a four-sided curved screen.

technical solutions

The present application provides a screen assembly, which includes a cover plate and a flexible panel arranged in layers, the peripheral edge of the cover plate is bent toward the flexible panel, and the flexible panel includes a first plane, a flexible panel disposed around the first plane a curved surface, and a second plane connected to the curved surface, the curved surface includes a first arc-shaped surface and a second arc-shaped surface, and the first arc-shaped surface extends from the edge of the first plane along the The bending direction of the edge of the cover plate is formed by bending and extending, and the second arc-shaped surface is formed by bending and extending from the edge of the first arc-shaped surface toward a direction close to the first plane with a preset radius.

In the screen assembly of the present application, the included angle between the tangent at the contact edge between the first arc-shaped surface and the second arc-shaped surface and the second plane is a right angle.

In the screen assembly of the present application, the preset radius is 0.35mm.

In the screen assembly of the present application, a layer of photosensitive adhesive is attached to the surface of the second arc-shaped surface close to the cover plate, and the photosensitive adhesive is used to protect the second arc-shaped surface.

In the screen assembly of the present application, the adhesion area of the photosensitive adhesive is larger than the area of the second arc surface.

In the screen assembly of the present application, the screen assembly further includes a second support plate, and the second support plate is disposed on a surface of the second plane close to the cover plate.

In the screen assembly of the present application, a backing plate is sandwiched between the first support plate and the second support plate.

In the screen assembly of the present application, a gap exists between the backing plate and the second arc-shaped surface.

In the screen assembly of the present application, a heat sink is provided between the backing plate and the first support plate.

In the screen assembly of the present application, a polarizer is disposed between the cover plate, the first plane and the curved surface, and the shape of the polarizer is the same as the shape of the first plane and the curved surface. Adapt.

In the screen assembly of the present application, the surface of the polarizer close to the cover plate is covered with optical glue.

The present application also provides a screen assembly, which includes a cover plate and a flexible panel arranged in layers, the surrounding edges of the cover plate are bent toward the flexible panel, and the flexible panel includes a first plane and is disposed around the first plane. and a second plane connected to the curved surface, the curved surface includes a first arc-shaped surface and a second arc-shaped surface, and the first arc-shaped surface extends from the edge of the first plane along the The second arc-shaped surface is formed by bending and extending from the edge of the first arc-shaped surface in a direction close to the first plane with a preset radius. A layer of photosensitive adhesive is attached to the surface of the second arc-shaped surface close to the revision to protect the second arc-shaped surface. A first support plate is also provided on the surface of the flexible panel away from the cover plate, so The shape of the first support plate is adapted to the shape of the first plane and the first arc surface.

The present application further provides a display device including the screen assembly described in any one of the above.

beneficial effect

The present application provides a screen assembly and a display device, the screen assembly includes a cover plate and a flexible panel arranged in layers, the peripheral edge of the cover plate is bent toward the flexible panel, and the flexible panel includes a first plane, a curved panel arranged around the first plane surface, and a second plane connected with the curved surface, wherein the curved surface includes a first arc-shaped surface and a second arc-shaped surface, by causing the first arc-shaped surface to follow the bending direction of the edge of the cover plate from the edge of the first plane Bending extension is performed, and the second arc surface is bent and extended from the edge of the first arc surface with a preset radius toward the direction close to the first plane, so as to realize the adaptation between the flexible panel and the four-sided curved cover plate, and solve the problem of The technical problem that the existing panels cannot be adapted to the four-sided curved screen.

Description of drawings

The technical solutions and other beneficial effects of the present application will be apparent through the detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings.

FIG. 1 is a schematic structural diagram of a conventional screen assembly.

FIG. 2 is a schematic structural diagram of a screen assembly provided by an embodiment of the present application.

FIG. 3 is a schematic structural diagram of a flexible panel provided by an embodiment of the present application.

FIG. 4 is a schematic structural diagram of a side view of a cover plate provided by an embodiment of the present application.

FIG. 5 is a schematic diagram of a bending angle of a flexible panel provided by an embodiment of the present application.

Embodiments of the present invention

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. To simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the application. Furthermore, this application may repeat reference numerals and/or reference letters in different instances for the purpose of simplicity and clarity, and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, this application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc., or The positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as a limitation on this application. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as "first", "second" may expressly or implicitly include one or more of said features. In the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be a mechanical connection, an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In this application, unless otherwise expressly specified and defined, a first feature "on" or "under" a second feature may include direct contact between the first and second features, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

Please refer to FIG. 1 , which is a schematic structural diagram of a conventional screen assembly. The existing screen assembly includes a cover plate 10 and a flexible panel 20. Currently, the cover plate 10 used in the existing screen assemblies on the market is a conventional 3D CG (Cover Glass, cover glass), that is, the two sides of the cover plate 10 are For bending, in the manufacturing process of the flexible panel 20 , the flexible panel 20 is generally bent 180 degrees according to a certain radius, as shown in FIG. 1 , the bent portion 21 of the flexible panel 20 is U-shaped.

However, with the continuous development of display technology, more and more four-sided curved screens have appeared on the market. The cover of the four-sided curved screen is different from the conventional 3D cover glass, and its upper, lower, left and right sides are It is curved, and the existing bending method of the flexible panel cannot be applied to the cover plate of the four-sided curved screen, and needs to be improved.

Please refer to FIG. 2 and FIG. 3 , FIG. 2 is a schematic structural diagram of a screen assembly provided by an embodiment of the present application, and FIG. 3 is a structural schematic diagram of a flexible panel provided by an embodiment of the present application. The screen assembly 100 includes a cover plate 110 and a flexible panel 120 that are stacked in layers. The peripheral edge of the cover plate 110 is bent toward the flexible panel 120. As shown by the dotted boxes in FIG. A curved surface 122 provided by a flat surface 121, and a second flat surface 123 connected with the curved surface 122, specifically. The curved surface 122 includes a first curved surface 1221 and a second curved surface 1222. The first curved surface 1221 is formed by bending and extending from the edge of the first plane 121 along the curved direction of the edge of the cover plate 110. The second curved surface 1222 is formed by bending and extending from the edge of the first arc-shaped surface 1221 toward a direction close to the first plane 121 with a preset radius.

Please refer to FIG. 4 , which is a schematic structural diagram of a cover plate 110 according to an embodiment of the present application. As can be seen from FIG. 4 , the upper, lower, left and right edges of the cover plate 110 are all curved. Specifically, the cover plate 110 can be a glass cover plate. It is worth noting that it is ideal that the glass cover plate is as thin as possible. An increase in weight or a decrease in visibility will result, and therefore, the upper limit of the thickness of the glass cover plate is preferably 0.8 mm, and the lower limit is preferably 0.5 mm.

Specifically, the preset radius may be 0.35mm. Please refer to FIG. 5 . FIG. 5 is a schematic diagram of the bending angle of the flexible panel provided by the embodiment of the application. It can be seen from FIG. 5 that the first arc surface 1221 and the second arc The included angle between the tangent (L1) at the contact edge (D) between the curved surfaces 1222 and the second plane 123 is a right angle. Specifically, since the bending angle of the second curved surface 1222 is much smaller than 180 degrees, therefore , the stress on the second arc-shaped surface 1222 is far less than the stress on the bending part of the existing flexible panel, which can improve the service life of the flexible panel 120 .

Specifically, the base material of the flexible panel 120 can be plastic, polyester film or film. Since the upper electrode or TFT material needs to be sputtered on the flexible panel 120, the flexible panel 120 is usually a high temperature resistant polymer, which must be resistant to high temperature. of polyimide (PI) material.

In this embodiment, a layer of photosensitive adhesive 130 is attached on the surface of the second arc-shaped surface 1222 close to the cover plate 110 to protect the second arc-shaped surface 1222. The area of the arc-shaped surface 1222, that is, the photosensitive adhesive 130 can also be partially attached to the first arc-shaped surface 1221 and/or the second plane 123, and at the same time, the photosensitive adhesive 130 is attached to the first arc-shaped surface 1221 and the second plane. The thickness of the portion on 123 may be appropriately reduced.

Specifically, during the curing process of the photosensitive adhesive 130 , the glue at the edge will overflow and coat by the glue itself, resulting in an uncontrollable slope, which causes the photosensitive adhesive 130 at the edge to be thinner. When the second curved surface 1222 is bent , the force will tend to the parts that are easy to bend, and it is easy to cause the edge of the second arc surface 1222 to cover the thinner part of the photosensitive adhesive 130 to produce dead folds, resulting in circuit breakage. Therefore, the adhesion area of the photosensitive adhesive 130 can be appropriately increased to ensure flexibility. The quality of the panel 120 , and in order to save costs and minimize the thickness of the screen assembly 100 , the thickness of the part of the photosensitive adhesive 130 attached to the first curved surface 1221 and the second flat surface 123 can be appropriately reduced.

In this embodiment, the screen assembly 100 further includes a first support plate 140 , the first support plate 140 is disposed on the surface of the flexible panel 120 away from the cover plate 110 and has a shape similar to the first plane 121 and the first arc surface 1221 is compatible. Preferably, the second arc surface 1222 can be bent along the end of the first support plate 140 .

In this embodiment, the screen assembly 100 further includes a second support plate 150 , and the second support plate 150 is disposed on the surface of the second plane 123 close to the cover plate 110 .

Specifically, the materials of the first support plate 140 and the second support plate 150 include, but are not limited to, polyethylene terephthalate (PET), polyethylene (PE), the first support plate 140 and the second support plate 150 . The thickness of the two support plates 150 ranges from 0.06mm to 0.2mm.

Specifically, the first support plate 140 and the second support plate 150 may be bonded to the flexible panel 120 by an adhesive (not shown in the figure). It should be understood that the adhesive refers to a material that can bond two objects. It can be cured by heat or cured by light. Optionally, the first support plate 140 and the second support plate 150 can also be supported by light-cured polymer materials, such as UV glue, which can save coating. The process steps of the cloth adhesive.

In this embodiment, a backing plate 160 is also sandwiched between the first supporting plate 140 and the second supporting plate 150 .

Specifically, the material of the backing plate 160 is mainly a stiffener material, such as a metal sheet, a plastic sheet, a resin film and an epoxy glass substrate, etc., which are used to reinforce the part of the flexible panel 120 and play a supporting and fixing role. , generally, the conventional thickness of the backing plate 160 is 0.1mm-0.6mm.

It is worth noting that there is a gap between the backing plate 160 and the second arc-shaped surface 1222. Since the second arc-shaped surface 1222 is relatively fragile, there is a certain gap between the backing plate 160 and the second arc-shaped surface 1222. As shown in the area A in FIG. 2 , the backing plate 160 and the second arc-shaped surface 1222 are not in contact at all, so that the backing plate 160 can be prevented from causing damage to the second arc-shaped surface 1222 .

In this embodiment, a heat sink 170 is disposed between the backing plate 160 and the first support plate 140 .

Specifically, the heat sink 170 may be SCF (Super Clean Foam) heat dissipation material, SCF can realize the functions of buffering and shading, and most importantly, it can realize heat dissipation. Since SCF is a composite material that integrates functions such as shading, heat dissipation, buffering, and electromagnetic shielding, it not only reduces the lamination process of the factory process , which in turn helps to reduce the thickness of the screen assembly 100 , wherein the conventional thickness of the SCF is 0.2 mm.

In addition, a layer of adhesive material may be provided on the surfaces of the heat sink 170, the first support plate 140, and the second support plate 150 in contact with the backing plate 160, and the heat sink 170, the first support plate 140, and the The two supporting plates 150 are attached to the backing plate 160 to prevent the flexible panel 120 from shaking, thereby affecting the display of the screen assembly 100. Specifically, the adhesive materials can be epoxy resin glue (AD glue), conductive glue and textured A kind of glue (EMBO glue), its thickness can be 0.035mm-0.3mm, which can be adjusted appropriately according to the viscosity requirements, and the commonly used AD glue can be 0.05mm.

In this embodiment, a polarizer 180 is disposed between the cover plate 110 , the first plane 121 and the curved surface 122 , and the polarizer 180 and the first plane 121 are adapted to the shape of the curved surface 122 .

Specifically, since the flexible panel 120 itself is in a self-luminous display mode, when the external light source is reflected on the metal electrode of the flexible panel 120 , it will cause reflected light interference on the surface of the cover plate 110 and reduce the contrast. Therefore, the polarizer 180 is provided to block the reflection of external light, so as to ensure that the display of the screen assembly 100 maintains a high contrast ratio. The thickness of the polarizer 180 may be 0.06mm-0.18mm.

In this embodiment, the optical glue 190 is covered on the surface of the polarizer 180 close to the cover plate 110 .

Specifically, the optical adhesive 190 is a special adhesive used for bonding transparent optical components (such as lenses, etc.), with colorless transparency, light transmittance of more than 90%, good bonding strength, and can be cured at room temperature or medium temperature, curing shrinkage Therefore, it is very suitable as a bonding material for the polarizer 180 and the cover plate 110 . The thickness of the optical glue may be 0.1mm-0.175mm.

The present application further provides a display device, which includes the screen assembly described in any of the above embodiments, and the specific reference may be made to the above, which will not be repeated here.

In this embodiment, the display device can be applied to any product or component with a display function, such as a mobile phone, a monitor, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator, and the like.

According to the above embodiment, it can be known that:

The present application provides a screen assembly and a display device. The screen assembly 100 includes a cover plate 110 and a flexible panel 120 arranged in layers. The surrounding edges of the cover plate 110 are bent toward the flexible panel 120. The flexible panel 120 includes a first plane 121, A curved surface 122 arranged around the first plane, and a second plane 123 connected to the curved surface, wherein the curved surface 122 includes a first arc-shaped surface 1221 and a second arc-shaped surface 1222. The edge of the first plane 121 is bent and extended along the bending direction of the edge of the cover plate 110 , and the second arc-shaped surface 1222 is bent and extended from the edge of the first arc-shaped surface 1221 with a preset radius toward the direction close to the first plane 121 . , the adaptation between the flexible panel and the four-sided curved cover plate is realized, and the technical problem that the existing panel cannot be applied to the four-sided curved screen is solved.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

A screen assembly and a display device provided by the embodiments of the present application have been described in detail above. The principles and implementations of the present application are described in this document by using specific examples. The descriptions of the above embodiments are only used to help understand the present application. Those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some of the technical features; and these modifications or replacements, and The essence of the corresponding technical solutions is not deviated from the scope of the technical solutions of the embodiments of the present application.

Claims

A screen assembly includes a cover plate and a flexible panel arranged in layers, the peripheral edge of the cover plate is bent toward the flexible panel, the flexible panel includes a first plane, a curved surface arranged around the first plane, and a second plane connected with the curved surface, the curved surface includes a first arc-shaped surface and a second arc-shaped surface, and the first arc-shaped surface extends from the edge of the first plane along the edge of the cover plate The second arc-shaped surface is formed by bending and extending in the bending direction of the first arc-shaped surface with a preset radius from the edge of the first arc-shaped surface toward the direction close to the first plane.
The screen assembly according to claim 1, wherein an included angle between a tangent at a contact edge between the first arc-shaped surface and the second arc-shaped surface and the second plane is a right angle.
The screen assembly of claim 1, wherein the predetermined radius is 0.35mm.
The screen assembly according to claim 1, wherein a layer of photosensitive adhesive is attached on the surface of the second arc-shaped surface close to the cover plate, and the photosensitive adhesive is used to protect the second arc-shaped surface.
According to the screen assembly of claim 4, the adhesion area of the photosensitive adhesive is larger than the area of the second arc-shaped surface.
The screen assembly according to claim 1, wherein the screen assembly further comprises a first support plate, the first support plate is disposed on a surface of the flexible panel away from the cover plate, and has a shape similar to that of the first support plate. A plane is adapted to the shape of the first arc-shaped surface.
The screen assembly of claim 6, wherein the screen assembly further comprises a second support plate disposed on a surface of the second plane close to the cover plate.
The screen assembly of claim 7, wherein a backing plate is sandwiched between the first support plate and the second support plate.
The screen assembly of claim 8, wherein a gap exists between the backing plate and the second arc-shaped surface.
The screen assembly of claim 8, wherein a heat sink is provided between the backing plate and the first support plate.
The screen assembly of claim 1, wherein a polarizer is disposed between the cover plate and the first plane and the curved surface, and the polarizer has a shape and the first plane and the curved surface to the shape of the face.
The screen assembly of claim 11, wherein a surface of the polarizer close to the cover plate is covered with optical glue.
A screen assembly includes a cover plate and a flexible panel arranged in layers, the peripheral edge of the cover plate is bent toward the flexible panel, the flexible panel includes a first plane, a curved surface arranged around the first plane, and a second plane connected with the curved surface, the curved surface includes a first arc-shaped surface and a second arc-shaped surface, and the first arc-shaped surface extends from the edge of the first plane along the edge of the cover plate The second arc-shaped surface is formed by bending and extending from the edge of the first arc-shaped surface with a preset radius toward the direction close to the first plane, and the second arc-shaped surface is formed by bending and extending in the bending direction of the first surface. A layer of photosensitive adhesive is attached to the surface close to the modified version to protect the second arc-shaped surface, and a first support plate is also provided on the surface of the flexible panel away from the cover plate. The shape of the plate is adapted to the shape of the first plane and the first arc surface.
The screen assembly of claim 13, wherein the screen assembly further comprises a second support plate disposed on a surface of the second plane close to the cover plate.
The screen assembly of claim 14, wherein a backing plate is interposed between the first support plate and the second support plate.
The screen assembly of claim 15, wherein a gap exists between the backing plate and the second arcuate surface.
The screen assembly of claim 15, wherein a heat sink is provided between the backing plate and the first support plate.
The screen assembly of claim 13, wherein a polarizer is provided between the cover plate and the first plane and the curved surface, and the polarizer has a shape and the first plane and the curved surface to the shape of the face.
The screen assembly of claim 18, wherein a surface of the polarizer close to the cover plate is covered with optical glue.
A display device, wherein the display device includes the screen assembly of claim 1 .