CN113366557A

CN113366557A - Flexible display device, electronic apparatus, and method of manufacturing flexible display device

Info

Publication number: CN113366557A
Application number: CN201980090102.8A
Authority: CN
Inventors: 丁有翔
Original assignee: Shenzhen Royole Technologies Co Ltd
Current assignee: Shenzhen Royole Technologies Co Ltd
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2021-09-07
Also published as: WO2021007811A1

Abstract

A flexible display device (30) comprises a support sheet (31) and a flexible screen (33), wherein the flexible screen (33) comprises a bendable region (331), a first non-bending region (333) and a second non-bending region (335) which are positioned at two sides of the bendable region (331), the support sheet (31) supports the bendable region (331) and at least part of the first non-bending region (333), and a colloid layer (40) is arranged between the support sheet (31) and at least part of the first non-bending region (333); an elastic colloid (50) is arranged between the support sheet (31) and the bendable region (331); when the flexible screen (33) is in the unfolded state, the thicknesses of the colloid layer (40) and the elastic colloid (50) are the same. When the flexible display device (30) is in a flattening state, the elastic colloid (50) can support the bendable region (331) to prevent the flexible screen (33) from sinking, so that the flexible screen (33) is kept flat; when the flexible display device (30) is bent or flattened, the elastic colloid (50) can be stretched and deformed, and the elastic colloid (50) generates elastic tension, so that the flexible screen (33) and the support sheet (31) are kept adhered without separation.

Description

Flexible display device, electronic apparatus, and method of manufacturing flexible display device

Technical Field

The present application relates to the field of display devices, and in particular, to a flexible display device, an electronic apparatus provided with the flexible display device, and a method of manufacturing the flexible display device.

Background

With the development of flexible screens, foldable electronic devices have appeared in the market, and the existing foldable electronic devices generally implement bending of the flexible screen through hinges. However, in the process of bending or flattening the foldable electronic device, the flexible screen and the hinge can slide relatively to each other to cause friction, which easily causes damage to the flexible screen, and further affects the function of the flexible screen.

In the prior art, generally, a support sheet is correspondingly arranged on the back of a bendable region of a flexible screen to prevent the flexible screen from being worn, and specifically, the support sheet and the flexible screen are in sliding fit to facilitate bending or flattening of the flexible screen. However, the supporting sheet is in sliding fit with the flexible screen, which means that a gap area exists between the supporting sheet and the flexible screen, when the flexible screen is in a flattened state, the flexible screen is in a suspended state in the gap area, so that fine depressions are easily generated, the flexible screen is uneven, and bad visual feeling is brought to a user; moreover, when the flexible screen is bent or unfolded, the flexible screen is subjected to external force and is easily separated from the supporting sheet to be arched, so that the display of the flexible screen is failed or damaged.

Disclosure of Invention

The application provides a flexible display device capable of preventing a flexible screen from generating a depression in a gap area and preventing the flexible screen from being separated from a supporting sheet, electronic equipment provided with the flexible display device, and a manufacturing method of the flexible display device.

In order to solve the above problems, an aspect of the present application provides a flexible display device, including a supporting sheet and a flexible screen, where the flexible screen includes a bendable region and a first non-bending region and a second non-bending region located at two sides of the bendable region, the supporting sheet supports the bendable region and at least a portion of the first non-bending region, and a glue layer is disposed between the supporting sheet and at least a portion of the first non-bending region; an elastic colloid is arranged between the support sheet and the bendable region; when the flexible screen is in an unfolded state, the thicknesses of the colloid layer and the elastic colloid are both the first thickness.

The present application further provides an electronic device, including a housing and a flexible display device, where the housing includes a first frame, a second frame, and a bendable device connected between the first frame and the second frame, and the flexible display device is disposed on the first frame, the second frame, and the bendable device; the flexible display device comprises a supporting sheet and a flexible screen, wherein the flexible screen comprises a bendable region and a first non-bending region and a second non-bending region which are positioned at two sides of the bendable region, the supporting sheet supports the bendable region and at least part of the first non-bending region, and a colloid layer is arranged between the supporting sheet and at least part of the first non-bending region; an elastic colloid is arranged between the support sheet and the bendable region; when the flexible screen is in an unfolded state, the thicknesses of the colloid layer and the elastic colloid are both the first thickness.

In yet another aspect, the present application further provides a method for manufacturing a flexible display device, where the flexible display device includes a flexible screen and a supporting sheet, the flexible screen includes a bendable region and a first non-bendable region and a second non-bendable region located at two sides of the bendable region, and the supporting sheet supports the bendable region and at least a portion of the first non-bendable region, and the method includes the steps of; a colloid layer with a first thickness is arranged between the support sheet and at least part of the first non-bending area; and elastic colloid with a first thickness is arranged in a gap area formed between the support sheet and the bendable area, is arranged in the edge areas of two opposite sides of the gap area, and is bonded with the flexible screen and the support sheet through pressing and curing.

According to the electronic equipment, the elastic colloid is arranged between the bendable region of the flexible screen of the flexible display device and the supporting sheet, and when the flexible display device is in a flat state, the elastic colloid can support the bendable region of the flexible screen, so that the flexible screen is prevented from sinking, and the whole flexible screen is kept flat; when the flexible display device is bent or flattened, the elastic colloid can be stretched and deformed to provide sliding compensation for relative sliding of the flexible screen and the supporting sheet, and meanwhile, elastic tension for pulling the flexible screen to the supporting sheet is generated, so that the flexible screen and the supporting sheet are kept bonded without separation, and display failure or damage of the flexible screen is prevented.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic perspective view of an electronic device in a first embodiment of the present application.

Fig. 2 is a schematic front structure diagram of the electronic device in fig. 1.

Fig. 3 is a schematic partial cross-sectional view taken along line III-III in fig. 1.

Fig. 4 is a schematic sectional view taken along line IV-IV in fig. 1.

Fig. 5 is a schematic cross-sectional view of an electronic device in a second embodiment of the present application.

Fig. 6 is a schematic cross-sectional view of an electronic device in a third embodiment of the present application.

Fig. 7 is a schematic cross-sectional view of an electronic device in a fourth embodiment of the present application.

Fig. 8 is a schematic cross-sectional view of an electronic device in a fifth embodiment of the present application.

Fig. 9 is a schematic front structure diagram of an electronic device in a sixth embodiment of the present application.

Fig. 10 is a cross-sectional schematic view of the electronic device in fig. 9.

Fig. 11 is a schematic front structure diagram of an electronic device in a seventh embodiment of the present application.

Fig. 12 is a cross-sectional schematic view of the electronic device in fig. 11.

Fig. 13 is a schematic cross-sectional view of an electronic device in an eighth embodiment of the present application.

Fig. 14 is a flowchart of a method of manufacturing a flexible display device of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features.

Referring to fig. 1 to 4, an electronic device 100 according to a first embodiment of the present disclosure includes a housing 20 and a flexible display device 30, where the housing 20 includes a first frame 21, a second frame 23, and a flexible device 25 connected between the first frame 21 and the second frame 23, and the flexible display device 30 is disposed on front surfaces of the first frame 21, the second frame 23, and the flexible device 25. The flexible display device 30 includes a supporting sheet 31, two connecting sheets 32 respectively connected to two sides of the supporting sheet 31, and a flexible screen 33 disposed on front surfaces of the supporting sheet 31 and the two connecting sheets 32. The flexible screen 33 includes a screen body 332 and a protective layer 334 stacked on one side of the screen body 332 facing the support sheet 31, wherein the protective layer 334 is fixedly attached to the back side of the screen body 332. The flexible screen 33 includes a bendable region 331 corresponding to the bendable device 25, and a first non-bendable region 333 and a second non-bendable region 335 located at two opposite sides of the bendable region 331. The supporting sheet 31 supports the bendable region 331 and at least a portion of the first non-bendable region 333, and the connecting sheet 32 supports a portion of the flexible screen 33 that is not supported by the supporting sheet 31. A first colloid layer 40 is disposed between the supporting sheet 31 and at least a portion of the first non-bending region 333, an elastic colloid 50 is disposed between the supporting sheet 31 and the bending region 331, and both the first colloid layer 40 and the elastic colloid 50 are disposed between the protective layer 334 and the supporting sheet 31. When the flexible screen 33 is in a flattened state, the thicknesses of the elastic colloid 50 and the first colloid layer 40 are both a first thickness, and the elastic colloid 50 can support the bendable region 331 so as to keep the flexible screen 33 flat; when the flexible screen 33 is bent or unfolded, the elastic colloid 50 is stretched and deformed, the thickness of the elastic colloid 50 is reduced to provide sliding compensation for relative sliding between the flexible screen 33 and the supporting sheet 31, and the elastic colloid 50 can simultaneously generate elastic tension for pulling the flexible screen 33 to the supporting sheet 31, so that the flexible screen 33 and the supporting sheet 31 are kept adhered without being separated.

In this embodiment, the front surface refers to a surface facing the light emitting surface of the flexible screen 33, and the back surface refers to a surface facing away from the light emitting surface of the flexible screen 33.

In this embodiment, the electronic device 100 is a mobile phone; the bendable means 25 is a hinge; the support sheet 31 is a bendable thin steel sheet; the connecting piece 32 is a plastic piece. It is to be appreciated that in other embodiments, the electronic device 100 can be, but is not limited to, a radiotelephone, pager, Web browser, notepad, calendar, and/or a Global Positioning System (GPS) receiver PDA, etc.; the bendable means 25 may be other types of spindle assemblies; the support sheet 31 may be a liquid metal sheet or a polyester film sheet; the connecting piece 32 may be a rubber piece or a silicon piece.

The support sheet 31 and the connection sheet 32 may be connected into a whole by injection molding, or may be connected into a whole by bonding, screwing, or the like. Preferably, in this embodiment, the supporting sheet 31 and the connecting sheet 32 are connected into a whole by injection molding, so as to simplify a supporting mechanism formed by the supporting sheet 31 and the two connecting sheets 32, so that the flexible display device 30 is lighter and thinner, and the electronic device 100 is also lighter and thinner, which is convenient for a user to carry and use.

As shown in fig. 3, in the present embodiment, the supporting sheet 31 supports a partial region of the bendable region 331 and a partial region of the first non-bendable region 333 adjacent to one side of the bendable region 331, a first glue layer 40 with a first thickness is disposed between the supporting sheet 31 and the partial region of the first non-bendable region 333 adjacent to one side of the bendable region 331, and an elastic glue 50 (not shown) with a first thickness is disposed between the supporting sheet 31 and the bendable region 331.

The elastic colloid 50 is formed by pressing and curing organic silicon glue or OCA optical glue, and is used for bonding the flexible screen 33 and the support sheet 31. In this embodiment, the elastic colloid 50 is formed by pressing and curing organic silicon glue.

The first colloid layer 40 may be a double-sided adhesive layer, or may be an elastic colloid layer similar to the elastic colloid 50. Preferably, in this embodiment, the first colloid layer 40 is an elastic colloid layer identical to the elastic colloid 50, so that the first colloid layer 40 and the elastic colloid 50 may be integrally disposed to have better adhesion, when the flexible screen 33 is bent or flattened, the flexible screen 33 slides relative to the supporting sheet 31, the first colloid layer 40 is not easily separated from the elastic colloid 50, and the flexible screen 33 is firmly bonded to the supporting sheet 31.

In other embodiments, the supporting sheet 31 may simultaneously support the whole regions of the bendable region 331 and the first non-bendable region 333 of the flexible screen 33.

It can be understood that the first non-bending region 333 and the second non-bending region 335 are relative, that is, in other embodiments, the supporting sheet 31 may simultaneously support the bendable region 331 of the flexible screen 33 and at least a portion of the second non-bending region 335, and a first glue layer 40 having a first thickness is disposed between the supporting sheet 31 and at least a portion of the second non-bending region 335, which has the same function as the foregoing embodiments and is not described herein again.

In a further preferred embodiment, the supporting sheet 31 may simultaneously support the bendable region 331 of the flexible screen 33, at least a portion of the first non-bendable region 333, and at least a portion of the second non-bendable region 335, so that the first colloid layer 40 disposed at one side of the first bendable region 333 and the second bendable region 335 adjacent to the bendable region 331 may be integrally disposed with the elastic colloid 50, so as to better bond the flexible screen 33 and the supporting sheet 31.

In order to enable the flexible screen 33 to be flatly adhered to the front surfaces of the supporting sheet 31 and the connecting sheet 32, a second colloid layer 45 with a first thickness is disposed between the protective layer 334 of the flexible screen 33 and the connecting sheet 32.

The second colloid layer 45 may be a double-sided adhesive layer, or may be an elastic colloid layer similar to the elastic colloid 50. Preferably, in this embodiment, the second colloid layer 45 is an elastic colloid layer similar to the elastic colloid 50. Therefore, in this embodiment, the first glue layer 40, the second glue layer 45 and the elastic glue 50 are all organic silicon glue with a first thickness, and when glue is dispensed to the flexible display device 30, the glue can be dispensed and pressed for curing synchronously, so that the glue dispensing process is convenient and fast.

Wherein the first thickness may be any value of 0.05mm to 0.15 mm. In the present embodiment, the first thickness is preferably 0.1 mm.

It should be noted that the first thickness refers to a thickness of the first colloid layer 40, the second colloid layer 45, or the elastic colloid 50 when the flexible screen 33 is in a flattened state; it is understood that during the bending or flattening process of the flexible screen 33, the thickness of the elastic gel 50 is reduced due to the stretching, and the thickness of the first and

second gel layers

40 and 45 is substantially unchanged.

In the application, the elastic colloid 50 is arranged between the bendable region 331 of the flexible screen 33 and the supporting sheet 31, when the flexible screen 33 is in a flattening state, the thickness of the elastic colloid 50 is the same as that of a colloid layer arranged at the back of the non-bending region of the flexible screen 33, and the elastic colloid 50 can support the bendable region 331, so that the flexible screen 33 is prevented from being sunken, the whole flexible screen 33 is kept flat, and better visual perception is brought to a user; when the flexible screen 33 is bent or flattened, the elastic colloid 50 can be stretched and deformed to provide sliding compensation for relative sliding between the flexible screen 33 and the supporting sheet 31, and at the same time, an elastic tensile force for pulling the flexible screen 33 to the supporting sheet 31 is generated, so that the flexible screen 33 and the supporting sheet 31 are kept adhered without separation, thereby preventing the flexible screen 33 from display failure or damage.

It can be understood that, when the bendable region 331 of the flexible screen 33 is completely bonded to the supporting sheet 31, the elastic gel 50 is equivalent to an elastic gel layer, and at this time, the elastic gel 50 is not easily elastically deformed, and the flexible screen 33 is hardly slid relative to the supporting sheet 31, and when the flexible screen 33 is bent or unfolded, the flexible screen 33 is easily damaged by pulling, and therefore, the elastic gel 50 may be disposed only at a portion of the gap region between the bendable region 331 of the flexible screen 33 and the supporting sheet 31, so that the elastic gel 50 can be elastically deformed more easily.

Specifically, referring to fig. 2 and fig. 4, in the present embodiment, the elastic colloid 50 includes two first elastic colloids 51 having a first thickness, and the two first elastic colloids 51 are respectively disposed in two side edge regions opposite to the slit region 337 between the supporting sheet 31 and the bendable region 331. Under the adhesive effect of the first elastic colloid 51, the left and right sides of the bendable region 331 of the flexible screen 33 are adhered to the supporting sheet 31, the first elastic colloid 51 can support the left and right sides of the bendable region 331 of the flexible screen 33, and can straighten the middle portion of the bendable region 331 to two sides, so that the flexible screen 33 can also keep flat in the bendable region 331.

The first elastic colloid 51 is a strip colloid, and the first elastic colloid 51 extends in a direction perpendicular to the bending axis of the flexible screen 33. In this embodiment, the direction of the bending axis of the flexible screen 33 is the width direction of the flexible screen 33, that is, the first elastic gel 51 extends along the length direction of the flexible screen 33.

Wherein the protective layer 334 can prevent the back surface of the flexible screen 33 from being worn by directly contacting the support sheet 31.

In this embodiment, the width of the supporting sheet 31 is equal to the width of the protective layer 334, that is, two opposite outer side surfaces of the supporting sheet 31 are respectively flush with two opposite outer side surfaces of the protective layer 334.

In this embodiment, the protection layer 334 is a liquid metal sheet, and the liquid metal sheet is fixedly attached to the back surface of the screen body 332.

It should be noted that the term "liquid metal" as used herein refers to an alloy which is heated to a molten state and then cooled at an ultra-fast cooling rate to solidify the alloy crystal lattice rather than being ordered and crystallized, and is also referred to as an amorphous alloy, a liquid metal or a metallic glass because it is in an amorphous state like glass. The liquid metal has the characteristics of long-range disorder (short-range order), metastable state, certain physical property isotropy, no definite melting point, glass transition temperature point and the like, has the characteristics of solid state, metal and glass, and can have high strength, high hardness, plasticity, heat conduction, wear resistance and the like under certain conditions. That is, the liquid metal referred to in the present invention is substantially solid at normal temperature, but has some properties close to those of liquid, and is therefore referred to as liquid metal.

In other embodiments, the protection layer 334 may be a wear-resistant plastic sheet or a wear-resistant rubber sheet fixedly attached to the back surface of the screen body 332.

In other embodiments, the width of the support sheet 31 may be greater than the width of the protective layer 334, so as to better support the flexible screen 33 and to stack the flexible screen 33 on the support sheet 31.

As shown in fig. 4, the screen body 332 includes a flexible screen panel 3321, a cover plate 3323 laminated on a front surface of the flexible screen panel 3321, and a light-blocking black glue layer 3325 laminated on a rear surface of the flexible screen panel 3321. The flexible screen 3321 is a main body displaying an image. The protection layer 334 is fixedly attached to the side surface of the light-shielding black glue layer 3325 opposite to the flexible screen panel 3321, that is, the protection layer 334 is fixedly attached to the back surface of the light-shielding black glue layer 3325.

The cover 3323 has a width greater than that of the flexible screen 3321, that is, the cover 3323 extends beyond the outer sides of the flexible screen 3321. The light blocking black glue layer 3325 has the same width as the flexible screen 3321.

In this embodiment, the width of the flexible screen panel 3321 is smaller than the width of the cover plate 3323 and is retracted relative to the cover plate 3323, which is beneficial for the cover plate 3323 to better protect the flexible screen panel 3321; the protective layer 334 has the same width as the flexible screen 3321.

In other embodiments, the width of the protective layer 334 may be larger than the width of the flexible screen 3321 and may extend outward relative to the flexible screen 3321, which may help the protective layer 334 better protect the flexible screen 3321.

Specifically, during dispensing, a first glue layer 40 with a first thickness is disposed on the front surface of the supporting sheet 31 corresponding to a partial region of the first non-bending region 333 adjacent to the bendable region 331; secondly, the first elastic colloid 51 with a first thickness is respectively arranged on the left side and the right side of the front surface of the supporting sheet 31 corresponding to the opposite regions of the bendable region 331 along the length direction of the flexible screen 33; laminating the flexible screen 33 on the support sheet 31, so that the back surface of the protective layer 334 is adhered to the first colloid layer 40 and the first elastic colloid 51; and finally, curing the first colloid layer 40 and the first elastic colloid 51 through pressing. At this time, the first elastic gel 51 may seal the gap region 337 formed between the bendable region 331 of the flexible screen 33 and the supporting sheet 31, prevent dust from entering between the flexible screen 33 and the supporting sheet 31, and may support both outer sides of the bendable region 331 and straighten the middle portion of the bendable region 331 toward both outer sides, so as to keep the bendable region 331 flat with respect to the non-bendable region; furthermore, the first elastic gel 51 can keep the supporting sheet 31 and the protective layer 334 bonded together all the time, so as to prevent the supporting sheet 31 and the flexible screen 33 from being separated.

Of course, in other embodiments, the first colloid layer 40 and the first elastic colloid 51 may be disposed at the left and right sides of the back surface of the protection layer 334, the flexible screen 33 may be stacked on the support sheet 31, and finally, the pressing and curing may be performed, so that the same effect may be achieved.

In other embodiments, the arrangement order of the first colloid layer 40 and the first elastic colloid 51 may be exchanged, that is, the first elastic colloid 51 is firstly disposed in a dotted manner, then the first colloid layer 40 is disposed, the flexible screen 33 is laminated on the supporting sheet 31, and finally, pressing and curing are performed, so that the same effect can be achieved.

It should be noted that, in this embodiment, the second glue layer 45 and the elastic glue 50 are the same elastic glue layer, and during glue dispensing, the glue dispensing process of the first glue layer 40 and the second glue layer 45 can be performed synchronously, which is not described herein again.

Referring to fig. 5, fig. 5 is a schematic cross-sectional view of an electronic device according to a second embodiment of the present application. The second embodiment of the present application provides an electronic device having a structure similar to that of the first embodiment, except that: in the second embodiment, a first groove 311 is formed in a position of one side of the supporting plate 31 facing the flexible panel 33, which corresponds to each first elastic colloid 51, each first groove 311 extends along the length direction of the flexible panel 33, and each first elastic colloid 51 is partially accommodated in the corresponding first groove 311.

In this embodiment, the width of the first groove 311 is smaller than the width of the first elastic colloid 51.

In other embodiments, the width of the first groove 311 is equal to the width of the first elastic gel 51.

In this embodiment, the cross section of the first groove 311 is rectangular, and the first groove 311 can increase the contact area between the first elastic colloid 51 and the support sheet 31, so that the first elastic colloid 51 is more firmly adhered to the support sheet 31 and the protective layer 334, and the dustproof effect is better.

In other embodiments, the cross section of the first groove 311 may be in any shape, such as a V shape, an arc shape, a trapezoid shape, or an irregular shape.

Of course, in other embodiments, the side of the supporting plate 31 facing the flexible screen 33 may be provided with only one first groove 311 corresponding to one of the first elastic colloids 51.

Referring to fig. 6, fig. 6 is a schematic cross-sectional view of an electronic device in a third embodiment of the present application. The third embodiment of the present application provides an electronic device having a structure similar to that of the first embodiment, except that: in the third embodiment, a second groove 3342 is formed at a position corresponding to each first elastic gel 51 on a side of the flexible screen 33 facing the support plate 31, specifically, a second groove 3342 is formed at a position corresponding to each first elastic gel 51 on a side of the protective layer 334 facing the support plate 31, each second groove 3342 extends along the length direction of the flexible screen 33, and each first elastic gel 51 is partially accommodated in the corresponding second groove 3342.

In this embodiment, the width of the second groove 3342 is smaller than the width of the first elastic gel 51.

In other embodiments, the width of the second groove 3342 is equal to the width of the first elastic gel 51.

In this embodiment, the cross section of the second groove 3342 is rectangular, and the second groove 3342 can increase the contact area between the first elastic colloid 51 and the protective layer 334, so that the first elastic colloid 51 is more firmly adhered to the support sheet 31 and the protective layer 334, and the dustproof effect is better.

In other embodiments, the cross-section of the second groove 3342 may be V-shaped, circular arc-shaped, trapezoid, or irregular.

Of course, in other embodiments, the side of the protection layer 341 facing the support sheet 31 may be provided with only one second groove 3342 corresponding to one of the first elastic colloids 51.

Referring to fig. 7, fig. 7 is a schematic cross-sectional view of an electronic device in a fourth embodiment of the present application. The fourth embodiment of the present application provides an electronic device having a structure similar to that of the first embodiment, except that: in the fourth embodiment, a first groove 311 is formed in a position corresponding to each first elastic colloid 51 on a side of the support plate 31 facing the flexible panel 33, a second groove 3342 is formed in a position corresponding to each first elastic colloid 51 on a side of the protection layer 334 facing the support plate 31, widths of the first groove 311 and the second groove 3342 are the same, when the flexible panel 33 is stacked on the support plate 31, the first groove 311 and the second groove 3342 are completely opposite to each other to form a communicating portion, and each first elastic colloid 51 is partially accommodated in the communicating portion.

Wherein the widths of the first recess 311 and the second recess 3342 are smaller than the width of the first elastic gel 51.

In this embodiment, the first recess 311 and the second recess 3342 can increase the contact area between the first elastic colloid 51 and the protective layer 334 and the supporting piece 31, so that the first elastic colloid 51 is more firmly adhered to the supporting piece 31 and the protective layer 334, and the dustproof effect is better.

In other embodiments, when the widths of the first recess 311 and the second recess 3342 are smaller than the width of the first elastic gel 51, the first recess 311 and the second recess 3342 may also be staggered to form a step-shaped communication portion, and each first elastic gel 51 is partially accommodated in the step-shaped communication portion.

In other embodiments, when the width of the first recess 311 and the second recess 3342 is smaller than the width of the first elastic gel 51, the first recess 311 and the second recess 3342 may also be completely dislocated and not connected, and each of the first elastic gel 51 is partially accommodated in the first recess 311 and the second recess 3342.

Of course, in other embodiments, the width of the first recess 311 and the second recess 3342 may also be equal to the width of the first elastic gel 51, when the flexible screen 33 is stacked on the supporting plate 31, the first recess 311 and the second recess 3342 are completely opposite to form a communicating portion, and each first elastic gel 51 is partially accommodated in the communicating portion.

Referring to fig. 8, fig. 8 is a schematic cross-sectional view of an electronic device in a fifth embodiment of the present application. The fifth embodiment of the present application provides an electronic device having a structure similar to that of the fourth embodiment, except that: in the fifth embodiment, the widths of the first recess 311 and the second recess 3342 are different, the width of the first recess 311 is smaller than the width of the second recess 3342, when the flexible screen 33 is stacked on the support plate 31, the first recess 311 completely corresponds to the second recess 3342, the first recess 311 and the second recess 3342 form a T-shaped communication portion, and each first elastic colloid 51 is partially accommodated in the T-shaped communication portion.

Wherein, the width of the second groove 3342 is smaller than the width of the first elastic gel 51.

In other embodiments, when the width of the first recess 311 is smaller than the width of the second recess 3342, the first recess 311 and the second recess 3342 may also be staggered to form a step-shaped communication portion, and each of the first elastic colloids 51 is partially accommodated in the step-shaped communication portion.

In other embodiments, when the width of the first recess 311 is smaller than the width of the second recess 3342, the first recess 311 and the second recess 3342 may be completely dislocated and not connected, and each of the first elastic colloid 51 is partially contained in the first recess 311 and the second recess 3342.

In other embodiments, when the widths of the first groove 311 and the second groove 3342 are different, the width of the first groove 311 may be greater than the width of the second groove 3342 and less than the width of the first elastic gel 51; similarly, the first recess 311 and the second recess 3342 may be connected or not connected, and will not be described herein again.

Of course, in other embodiments, when the width of the first recess 311 is different from the width of the second recess 3342, the width of the larger recess may also be equal to the width of the first elastic gel 51, when the flexible screen 33 is stacked on the support plate 31, the first recess 311 is communicated with the second recess 3342, and each of the first elastic gel 51 is partially accommodated in the first recess 311 and the second recess 3342 which are correspondingly communicated.

Referring to fig. 9 and 10 together, fig. 9 is a schematic front structure diagram of an electronic device in a sixth embodiment of the present application; fig. 10 is a cross-sectional schematic view of the electronic device in fig. 9. The structure of the electronic device provided by the sixth embodiment of the present application is similar to that of the first embodiment, except that: in the sixth embodiment, a second elastic gel 52 is further disposed in a middle region of the slit region 337, specifically, the second elastic gel 52 is disposed in a middle region between the back surface of the protection layer 334 and the front surface of the support sheet 31, which corresponds to a region of the bendable region 331, that is, the second elastic gel 52 is disposed between two first elastic gels 51. In this embodiment, the second elastic colloid 52 is a plurality of point-like colloids distributed in a matrix form, specifically, the point-like colloids located in the same row are arranged along the width direction of the flexible screen 33, the point-like colloids located in the same column are arranged along the length direction of the flexible screen 33, and two adjacent point-like colloids are spaced apart from each other.

In this embodiment, the dotted colloid is circular. The plurality of the point-shaped colloids can save the using amount of glue; moreover, the point-like colloids are spaced from each other, and the point-like colloids at other positions cannot be involved due to the failure of any point-like colloid, so that the support sheet 31 and the protection layer 334 are bonded more firmly, and the point-like colloids enable the bendable region 331 not to be completely attached to the support sheet 31, so that the flexible screen 33 and the support sheet 31 can slide relative to each other, and the flexible screen 33 is prevented from being damaged by pulling when being bent or unfolded.

In other embodiments, the dotted colloid may be in any shape of rectangle, diamond, polygon, irregular pattern, or the like.

In other embodiments, the second elastic colloid 52 is a plurality of strip-shaped colloids extending in a direction perpendicular to the bending axis of the flexible screen 33 and distributed at intervals in the direction of the bending axis of the flexible screen 33, that is, a plurality of strip-shaped colloids extending in the length direction of the flexible screen 33 and arranged at intervals in the width direction of the flexible screen 33, and the strip-shaped colloids are similar to the first elastic colloid 51.

Obviously, in other embodiments, a corresponding groove may be formed in a side of the supporting sheet 31 facing the flexible screen 33 and/or a side of the protective layer 334 facing the supporting sheet 31 corresponding to each of the second elastic colloids 52, and the second elastic colloids 52 may be partially accommodated in the grooves to increase a contact area between the protective layer 334 and the supporting sheet 31, so that the second elastic colloids 52 are more firmly adhered to the supporting sheet 31 and the protective layer 334, and the problem that the flexible screen 33 is arched or tilted in a middle portion corresponding to the bendable region 331 is prevented.

The structure of the groove is similar to the first groove 311 and/or the second groove 3342, and is not described herein again.

The second elastic colloid 52 and the first elastic colloid 51 may be formed by curing the same glue or by curing different glues. Preferably, in this embodiment, the second elastic colloid 52 is the same as the first elastic colloid 51, and is formed by curing an organic silicon glue.

During dispensing, the first adhesive layer 40 and the first elastic adhesive 51 may be dispensed, the second elastic adhesive 52 may be dispensed, the flexible screen 33 may be stacked on the support sheet 31, and finally, the flexible screen may be pressed and cured. Of course, the same effect can be achieved by disposing the second elastic colloid 52, disposing the first colloid layer 40 and the first elastic colloid 51, laminating the flexible screen 33 on the supporting sheet 31, and finally pressing and curing.

In the present embodiment, the dispensing process of the first glue layer 40 and the dispensing process of the second glue layer 45 may be performed simultaneously, which is not described herein again.

In this embodiment, the opposite both sides edge area in gap district 337 is provided with two first elastic colloid 51, and the region is provided with in the middle of it second elastic colloid 52, two first elastic colloid 51 can support the left and right sides in flexible screen 33's the regional 331 that can buckle, second elastic colloid 52 then can support the middle part in flexible screen 33's the regional 331 that can buckle is favorable to guaranteeing flexible screen 33 is smooth under the state of expanding.

Referring to fig. 11 and 12 together, fig. 11 is a schematic front structure diagram of an electronic device in a seventh embodiment of the present application; fig. 12 is a cross-sectional schematic view of the electronic device in fig. 11. The seventh embodiment of the present application provides an electronic device having a structure similar to that of the first embodiment, except that: in a seventh embodiment, two third elastic colloids 53 are disposed on two opposite outer sides of the flexible display device 30, each third elastic colloid 53 is a strip-shaped colloid extending along the length direction of the outer side of the flexible screen 33, the two third elastic colloids 53 are respectively used for bonding the two opposite outer sides of the flexible screen 33 in the bendable region 331 and the two corresponding outer sides of the supporting sheet 31, and the third elastic colloids 53 can also prevent external dust from entering between the protective layer 334 and the supporting sheet 31.

In this embodiment, the third elastic colloid 53 is connected with the first elastic colloid 51 into a whole, and specifically, the first elastic colloid 51 overflows from two opposite side edges of the slit region 337 under the pressing action to be cured to form the third elastic colloid 53. In other words, when the first elastic colloid 51 is disposed, a sufficient amount of glue can be disposed, and a proper amount of glue overflows from the two opposite side edges of the slit region 337 under the pressing action, and then the third elastic colloid 53 is formed by natural curing or assisted blowing curing.

In this embodiment, the first elastic colloid 51 and the third elastic colloid 53 are the same colloid, the first elastic colloid 51 is used for bonding the inner surfaces of the two side edges of the flexible screen 33 and the support sheet 31 opposite to the slit region 337, and the third elastic colloid 53 is used for bonding the two corresponding outer side surfaces of the flexible screen 33 and the support sheet 31 in the bendable region 331, so that the support sheet 31 and the flexible screen 33 are bonded more firmly.

In other embodiments, the third elastic colloid 53 may be disposed between two opposite outer sides of the flexible screen 33 in the bendable region 331 and two corresponding outer sides of the support sheet 31 in the bendable region 331 in a lateral dispensing manner, that is, the first elastic colloid 51 and the third elastic colloid 53 are non-integrated, and a space is provided between the third elastic colloid 53 and the first elastic colloid 51. The third elastic colloid 53 and the first elastic colloid 51 may be the same or different. Preferably, the third elastic colloid 53 is made of photosensitive adhesive, that is, after the first elastic colloid 51 is disposed in a point manner and is subjected to pressing and curing, the third elastic colloid 53 is disposed in a point manner, and is irradiated by ultraviolet light to accelerate curing, and at this time, the photosensitive adhesive is cured into elastic solid adhesive.

In other embodiments, the third elastic colloid 53 may be disposed on the outer side surface of the flexible screen panel 3321, the outer side surface of the light blocking black colloid layer 3325, the outer side surface of the protective layer 334, and the front surface of the supporting sheet 31 beyond the protective layer 334, a cross section of the third elastic colloid 53 is triangular, and the third elastic colloid 53 may not only prevent external dust from entering between the protective layer 334 and the supporting sheet 31, but also prevent external dust or water from entering the screen body 332. Obviously, in other embodiments, the cross section of the third elastic gel 53 may be rectangular, and the third elastic gel 53 only needs to be disposed on the outer side of the flexible screen panel 3321, the back surface of the portion of the cover plate 3323 beyond the screen body 332, the outer side of the light-shielding black gel layer 3325, the outer side of the protective layer 334, and the front surface of the portion of the support sheet 31 beyond the protective layer 334 at a same time.

It can be understood that the flexible screen 33 and/or the supporting sheet 31 may also be correspondingly provided with a groove for accommodating the first elastic gel 51, which is not described herein again.

Referring to fig. 13, fig. 13 is a schematic cross-sectional view of an electronic device in an eighth embodiment of the present application. The structure of the electronic device provided by the eighth embodiment of the present application is similar to that of the seventh embodiment, except that: in the eighth embodiment, the flexible screen 33 and the support sheet 31 respectively have corresponding receiving slots on two opposite outer sides of the bendable region 331 and on two corresponding outer sides of the bendable region 331, and the third elastic gel 53 is received in the corresponding receiving slots.

Specifically, in this embodiment, the protective layer 334 of the flexible panel 33 is respectively provided with a first receiving groove 3341 with a downward inclined opening on two opposite outer side surfaces of the bendable region 331, the supporting piece 31 is respectively provided with a second receiving groove 312 with an upward inclined opening on two corresponding outer side surfaces of the bendable region 331, the cross sections of the first receiving groove 3341 and the corresponding second receiving groove 312 are triangular, and the third elastic colloid 53 is received in the first receiving groove 3441 and the corresponding second receiving groove 312.

In this embodiment, the receiving groove can increase the contact area between the third elastic gel 53 and the protective layer 334 and the supporting piece 31, so that the protective layer 334 and the supporting piece 31 are bonded more firmly; furthermore, the third elastic colloid 53 is accommodated in the accommodating groove, so that the third elastic colloid 53 does not protrude from the two opposite outer side surfaces of the flexible screen 33, and the appearance is better.

In other embodiments, in the flexible display device 30 of the electronic apparatus 100, the first receiving groove 3341 with a downward slant may be respectively disposed only on the two opposite outer sides of the flexible region 331 of the protection layer 334, or the second receiving groove 312 with an upward slant may be respectively disposed only on the two corresponding outer sides of the flexible region 331 of the supporting sheet 31.

In other embodiments, the cross-sections of the first receiving groove 3441 and the second receiving groove 312 have other shapes such as a rectangle, a circular arc, or an irregular figure.

In other embodiments, the first receiving groove 3441 and the second receiving groove 312 may also be a plurality of receiving grooves distributed in a zigzag manner.

In other embodiments, the flexible screen 33 and/or the supporting sheet 31 may also be correspondingly provided with a groove for accommodating the first elastic gel 51, which is not described herein again.

In other embodiments, the second elastic gel 52 may be disposed in the middle region of the slit region 337, which is not described herein again.

It is understood that, in the present application, besides the flexible screen, the flexible screen 33 may also include none or only one or more or all of the black glue layer, the protective layer and the cover plate.

The first elastic colloid 51, the second elastic colloid 52 and the third elastic colloid 53 in the above embodiments have elasticity, so that they can generate tensile deformation when the supporting sheet 31 slides relative to the flexible screen 33, and when the relative position between the supporting sheet 31 and the flexible screen 33 is recovered, the first elastic colloid 51, the second elastic colloid 52 and the third elastic colloid 53 will automatically contract and deform to recover to the initial state due to their own elasticity, and will not be pulled apart. Wherein, the deformation degrees of the first elastic colloid 51, the second elastic colloid 52 and the third elastic colloid 53 are in proportion to the sliding distance of the supporting sheet 31 relative to the flexible screen 33, that is, c is satisfied²＝a ²+b ²Wherein c is the length of the first elastic gel 51, the second elastic gel 52 and the third elastic gel 53 after being stretched and deformedWhere a is a sliding distance of the support sheet 31 with respect to the flexible panel 33, and b is a distance between the support sheet 31 and the flexible panel 33 in a thickness direction. In other words, the stretching ranges of the first elastic gel 51, the second elastic gel 52 and the third elastic gel 53 satisfy

When the supporting sheet 31 slides relative to the flexible screen 33, the sliding direction of the supporting sheet 31 is X, and the thickness direction of the supporting sheet 31 is Y, and when the supporting sheet 31 slides relative to the flexible screen 33, the first elastic colloid 51, the second elastic colloid 52, and the third elastic colloid 53 are stretched and deformed along the directions inclined relative to both the X direction and the thickness direction Y.

Referring to fig. 14, the present application further provides a manufacturing method of a flexible display device, where the flexible display device includes the flexible screen 33 and the supporting sheet 31, the flexible screen 33 includes a bendable region 331 and a first non-bendable region 333 and a second non-bendable region 335 located at two sides of the bendable region 331, and the supporting sheet 31 supports the bendable region 331 and at least a portion of the first non-bendable region 333, specifically, the manufacturing method includes the following steps:

s1: a first colloid layer 40 with a first thickness is arranged between the support sheet 31 and at least part of the first non-bending region 333; and

s2: an elastic colloid 50 with a first thickness is arranged in a gap region 337 formed between the support sheet 31 and the bendable region 331, and the elastic colloid 50 is arranged in two opposite side edge regions of the gap region 337 and is cured by pressing to bond the flexible screen 33 and the support sheet 31.

Wherein, the first thickness refers to the thickness of the first colloid layer 40 and the elastic colloid 50 when the flexible screen 33 is in a flattened state; it will be appreciated that during bending or flattening of the flexible screen 33, the thickness of the elastic gel 50 is reduced by stretching, and the thickness of the first gel layer 40 is substantially unchanged.

The arrangement order of the first colloid layer 40 and the first elastic colloid 51 can be exchanged, that is, the first elastic colloid 51 is arranged first, then the first colloid layer 40 is arranged, and then the pressing and curing are performed, so that the same effect can be achieved.

The first colloid layer 40 may be a double-sided adhesive layer, or may be an elastic colloid layer similar to the elastic colloid 50. Preferably, in this embodiment, the first colloid layer 40 is an elastic colloid layer identical to the elastic colloid 50.

Specifically, the flexible screen 33 includes a screen body 332 and a protective layer 334 fixedly attached to the screen body 332 and facing the support sheet 31, and the colloid layer 40 and the elastic colloid 50 are disposed between the protective layer 334 and the support sheet 31 to adhere the protective layer 334 and the support sheet 31.

Specifically, the elastic colloid 50 includes two first elastic colloids 51 respectively disposed in the two opposite side edge regions of the gap region 337, the first elastic colloids 51 are strip-shaped colloids, and the first elastic colloids 51 extend in the direction perpendicular to the bending axis of the flexible screen 33, that is, along the length direction of the flexible screen 33.

The method for manufacturing the flexible display device further includes a step of disposing a second elastic gel 52 in a middle region of the slit region 337.

Specifically, in some embodiments, the second elastic colloid 52 is a plurality of point-like colloids distributed in a matrix.

In other embodiments, the second elastic glue 52 is a plurality of strip-shaped glue, and the plurality of strip-shaped glue extends along a direction perpendicular to the bending axis of the flexible screen 33 and is distributed at intervals along the bending axis of the flexible screen 33, that is, extends along the length direction of the flexible screen 33 and is arranged at intervals along the width direction of the flexible screen 33.

Further, the manufacturing method of the flexible display device further includes a step of disposing two third elastic colloids 53 between two opposite outer sides of the flexible screen 33 in the bendable region 331 and two corresponding outer sides of the support sheet 31 in the bendable region 331. Each of the third elastic colloids 53 is a strip-shaped colloid extending along the length direction of the outer side surface of the flexible screen 33.

Specifically, in some embodiments, the third elastic colloid 53 is formed by the first elastic colloid 51 overflowing from two opposite side edges of the gap region 337 under the pressing action, and the first elastic colloid 51 and the third elastic colloid 53 are an integral same colloid.

In other embodiments, the third elastic gel 53 is formed by dispensing laterally, the first elastic gel 51 and the third elastic gel 53 are non-integrated, and a space is formed between the third elastic gel 53 and the first elastic gel 51.

It should be noted that, the flexible screen 33 and/or the supporting sheet 31 may further be correspondingly provided with a groove for accommodating the elastic gel 50, and for a more detailed description, reference may be made to the related contents of the electronic device 100, which is not described herein again.

The foregoing is a preferred embodiment of the present application and it should be noted that modifications and embellishments could be made by those skilled in the art without departing from the principle of the present application and these are considered to be within the scope of the present application.

Claims

A flexible display device comprises a supporting sheet and a flexible screen, wherein the flexible screen comprises a bendable region, a first non-bending region and a second non-bending region, the first non-bending region and the second non-bending region are positioned on two sides of the bendable region; an elastic colloid is arranged between the support sheet and the bendable region;

when the flexible screen is in an unfolded state, the thicknesses of the colloid layer and the elastic colloid are both the first thickness.
The flexible display device of claim 1, wherein the elastic gel is cured by pressing to bond the flexible screen and the support sheet.
The flexible display device of claim 1, wherein the flexible screen comprises a screen body and a protective layer stacked on a side of the screen body facing the support sheet, and the gel layer and the elastic gel are disposed between the protective layer and the support sheet.
The flexible display device of claim 1, wherein the elastic gel has a first thickness when the flexible screen is in a flattened state, the elastic gel supporting the bendable region of the flexible screen to keep the flexible screen flat; when the flexible screen is bent or unfolded, the elastic colloid is stretched and deformed, the thickness of the elastic colloid is reduced, and the elastic colloid generates elastic tension, so that the flexible screen is bonded with the supporting sheet.
The flexible display device according to claim 1, wherein the elastic gel comprises two first elastic gels respectively disposed at two side edge regions opposite to the gap region between the supporting sheet and the bendable region.
The flexible display device of claim 5, wherein the first elastic gel is a strip-shaped gel, and the first elastic gel extends in a direction perpendicular to a bending axis of the flexible screen.
The flexible display device of claim 5, wherein the elastic gel further comprises a second elastic gel disposed in a middle region of the gap region.
The flexible display device according to claim 7, wherein the second elastic gel is a plurality of dot-like gels spaced in a matrix, or a plurality of stripe-like gels extending in a direction perpendicular to the bending axis of the flexible screen and spaced in the direction of the bending axis of the flexible screen.
The flexible display device according to claim 5, wherein the elastic gel further comprises two third elastic gels respectively used for bonding the flexible screen to two opposite outer sides of the bendable region and two corresponding outer sides of the supporting sheet.
The flexible display device according to claim 9, wherein the third elastic gel is integrally connected to the first elastic gel, and the first elastic gel overflows from two opposite side edges of the slit region under a pressing action to be cured to form the third elastic gel.
The flexible display device according to claim 9, wherein a space is provided between the third elastic gel and the first elastic gel, and the third elastic gel is disposed between two opposite outer sides of the flexible screen in the bendable region and two corresponding outer sides of the support sheet by lateral dispensing.
The flexible display device according to claim 9, wherein the flexible screen has a first receiving groove on two opposite outer sides of the bendable region and/or a second receiving groove on two corresponding outer sides of the supporting sheet for receiving the third elastic gel.
The flexible display device according to claim 1, wherein a first groove is formed in a position, corresponding to the elastic colloid, of one side of the support sheet facing the flexible screen, and/or a second groove is formed in a position, corresponding to the elastic colloid, of one side of the flexible screen facing the support sheet, and the elastic colloid is partially contained in the first groove and/or the second groove; the cross sections of the first groove and the second groove are V-shaped, rectangular, circular arc-shaped or trapezoidal.
The flexible display device of claim 13, wherein the support sheet defines a first recess and the flexible screen defines a second recess, and wherein the first recess and the second recess are in or out of communication when the flexible screen is stacked with the support sheet.
An electronic device comprising a housing, wherein the housing comprises a first frame, a second frame and a bendable apparatus connected between the first frame and the second frame, wherein the electronic device further comprises the flexible display apparatus according to any one of claims 1 to 14, and the flexible display apparatus is disposed on the first frame, the second frame and the bendable apparatus.
A manufacturing method of a flexible display device, the flexible display device comprising a flexible screen and a supporting sheet, the flexible screen comprising a bendable region and a first non-bendable region and a second non-bendable region located at both sides of the bendable region, the supporting sheet supporting the bendable region and at least a portion of the first non-bendable region, the manufacturing method comprising the steps of:

a colloid layer with a first thickness is arranged between the support sheet and at least part of the first non-bending area; and

elastic colloid with a first thickness is arranged in a gap area formed between the support sheet and the bendable area, the elastic colloid is arranged in the edge areas on two opposite sides of the gap area, and the flexible screen and the support sheet are bonded through pressing and curing.
The method of claim 16, wherein the flexible screen comprises a screen body and a protective layer fixedly attached to the screen body facing the support sheet, and the gel layer and the elastic gel are disposed between the protective layer and the support sheet to adhere the protective layer and the support sheet.
The manufacturing method according to claim 16, wherein the elastic gel comprises two first elastic gels respectively disposed at two opposite side edge regions of the slit region, the first elastic gel is a strip-shaped gel, and the first elastic gel extends along a direction perpendicular to a bending axis of the flexible screen.
The method of manufacturing of claim 16, further comprising the step of providing a second elastic gel in a middle region of the gap region.
The method according to claim 19, wherein the second elastic gel is a plurality of dot-like gels distributed in a matrix form, or a plurality of stripe-like gels extending in a direction perpendicular to the bending axis of the flexible screen and spaced apart in the direction of the bending axis of the flexible screen.
The method of manufacturing of claim 16, further comprising the step of providing two third elastic gels between two opposite outer sides of the flexible screen at the bendable region and two corresponding outer sides of the support sheet.
The method according to claim 21, wherein the third elastic gel is formed by the first elastic gel overflowing from two opposite side edges of the gap region under the pressing action, or the third elastic gel is formed by dispensing laterally.