CN112767843B - Flexible display module and display device - Google Patents
Flexible display module and display device Download PDFInfo
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- CN112767843B CN112767843B CN202110168214.XA CN202110168214A CN112767843B CN 112767843 B CN112767843 B CN 112767843B CN 202110168214 A CN202110168214 A CN 202110168214A CN 112767843 B CN112767843 B CN 112767843B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The invention relates to a flexible display module and a display device. This flexible display module assembly includes: the flexible display screen comprises a bending area, and the flexible display screen comprises a light-emitting surface and a backlight surface which are arranged in a back-to-back manner; the support frame is positioned on one side of the backlight surface of the flexible display screen and comprises a rotating shaft structure corresponding to the bending area, and the flexible display screen is unfolded or bent through the rotating shaft structure; buffer sets up between pivot structure and bending region, and buffer includes blotter and resilient means, and the blotter is the arc curved surface structure that corresponds with the bending region, and resilient means telescopically connects between pivot structure and blotter. The flexible display module can solve the problem of stress failure of the flexible display screen in a bending state, and prolong the fatigue life.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible display module and a display device.
Background
Along with the development of display technology, the consumer is more and more diversified, individualized to display device's demonstration demand, and flexible display module receives consumer's favor because of having advantages such as bendability, portable. However, the bending area of the flexible display screen of the flexible display module in the prior art has the problem of stress failure, which affects the fatigue life of the flexible display module.
Disclosure of Invention
The invention aims to provide a flexible display module and a display device, wherein the flexible display module can solve the problem of stress failure of a flexible display screen in a bending state.
In one aspect, an embodiment of the present invention provides a flexible display module, where the flexible display module includes: the flexible display screen comprises a bending area, and the flexible display screen comprises a light-emitting surface and a backlight surface which are arranged in a back-to-back manner; the support frame is positioned on one side of the backlight surface of the flexible display screen and comprises a rotating shaft structure corresponding to the bending area, and the flexible display screen is unfolded or bent through the rotating shaft structure; buffer sets up between pivot structure and bending region, and buffer includes blotter and resilient means, and the blotter is the arc curved surface structure that corresponds with the bending region, and resilient means telescopically connects between pivot structure and blotter.
In another aspect, the present invention further provides a display device, which includes the flexible display module described above.
According to the flexible display module and the display device provided by the embodiment of the invention, the buffer device is arranged between the bending area of the flexible display screen and the corresponding rotating shaft structure, wherein the buffer device comprises the buffer pad and the elastic device, the buffer pad is of an arc-shaped curved surface structure corresponding to the bending area, and the elastic device is telescopically connected between the rotating shaft structure and the buffer pad. In-process that the flexible display screen expandes or buckles through the pivot structure, bear the deflection of buckling the in-process through telescopic resilient means, and the blotter nevertheless is not connected with the back of the body plain noodles of flexible display screen at least partial contact all the time for flexible display screen can freely buckle when controlling its radius of buckling and be unlikely to the undersize, lead to the local sharp stress concentration that becomes of bending zone, thereby can improve the stress failure problem of the bending zone of flexible display screen, be favorable to improving the fatigue life of flexible display module.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. The figures are not drawn to scale.
Fig. 1 is a schematic structural diagram illustrating a flexible display screen of a flexible display module according to an embodiment of the present invention in an unfolded state;
FIG. 2 is an enlarged schematic view of region A of FIG. 1;
FIG. 3 is a schematic structural diagram of a flexible display screen of the flexible display module shown in FIG. 1 in a bent state;
fig. 4 is an enlarged structural view illustrating a region B of fig. 3;
FIG. 5 is a schematic structural diagram of a support frame of the flexible display module shown in FIG. 1;
FIG. 6 is a schematic view of a flexible display screen of a flexible display module according to an alternative embodiment of the invention in an unfolded state;
fig. 7 shows an enlarged structural view of a region C in fig. 6;
fig. 8 is a schematic structural diagram of a flexible display screen of the flexible display module shown in fig. 7 in a bent state;
fig. 9 shows an enlarged structural view of a region D in fig. 8;
fig. 10 is a schematic structural diagram illustrating a flexible display screen of a flexible display module according to an alternative embodiment of the invention in an unfolded state.
Detailed Description
Features of various aspects and exemplary embodiments of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
It is noted that, herein, relational terms such as third and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
It will be understood that when a layer or region is referred to as being "on" or "over" another layer or region in describing the structure of the element, it can be directly on the other layer or region or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
With the continuous development of display technology, portable display devices such as mobile phones and tablet computers are visible everywhere in life. The large-area display screen can promote the visual experience of a user, but the display device is not convenient to carry due to the expansion of the display screen, and the bendable flexible display module can be transported as required.
However, the bending radius of the flexible display screen of the flexible display module in the prior art is not controllable, which easily results in over-small local bending radius, over-large stress and uneven stress on the bending area. Along with the increase of the bending times, the stress failure risk of the bending area is increased, and the fatigue life of the flexible display module is influenced.
In order to solve the above problems, embodiments of the present invention provide a flexible display module, which may be an Organic Light-Emitting Diode (OLED) display module, and the following description will refer to the accompanying drawings for various embodiments.
Fig. 1 is a schematic structural diagram illustrating a flexible display screen of a flexible display module according to an embodiment of the present invention in an unfolded state, fig. 2 is a schematic structural diagram illustrating a region a in fig. 1 in an enlarged manner, fig. 3 is a schematic structural diagram illustrating a flexible display screen of a flexible display module illustrated in fig. 1 in a folded state, and fig. 4 is a schematic structural diagram illustrating a region B in fig. 3 in an enlarged manner.
Referring to fig. 1 to 4, an embodiment of the invention provides a flexible display module, including: flexible display screen 1, support frame 2 and buffer 3.
The flexible display screen 1 includes a bending area FA, and the flexible display screen 1 includes a light emitting surface 11 and a backlight surface 12 which are arranged in a back-to-back manner.
The support frame 2 is positioned on one side of the backlight surface 12 of the flexible display screen 1, the support frame 2 comprises a rotating shaft structure 23 corresponding to the bending area FA, and the flexible display screen 1 is unfolded or bent through the rotating shaft structure 23;
the buffer device 3 is disposed between the rotating shaft structure 23 and the bending region FA, the buffer device 3 includes a buffer pad 31 and an elastic device 32, the buffer pad 31 is an arc-shaped curved surface structure corresponding to the bending region FA, and the elastic device 32 is telescopically connected between the rotating shaft structure 23 and the buffer pad 31.
Optionally, the flexible display module is a rectangular structure. The flexible display screen 1 generally has a bending area FA parallel to the bending axis S about which the bending area FA is bendable. As shown in fig. 1 and 2, the flexible display screen 1 further includes a first display area AA1 and a second display area AA2, and the bending area FA is located between the first display area AA1 and the second display area AA 2. When the bending angle between the first display area AA1 and the second display area AA2 is 180 degrees, the flexible display screen 1 is in an unfolded state, the whole flexible display screen 1 is a large screen, and the flexible display module has a good visual effect. As shown in fig. 3 and 4, when the bending angle between the first display area AA1 and the second display area AA2 is between 0 ° and 180 °, the flexible display screen 1 is in an inward bending state, and the flexible display module can still display a picture while occupying a small space. When the bending angle between the first display area AA1 and the second display area AA2 is 0 degree, the first display area AA1 and the second display area AA2 are oppositely arranged to no longer display a picture, so that the flexible display module can be folded, and the flexible display module is convenient to carry. It can be understood that the flexible display module is not limited to a rectangular shape, and may also be a structure with any shape, which is not described in detail.
The supporting frame 2 is located on the backlight surface 12 side of the flexible display screen 1, and the supporting frame 2 includes a rotating shaft structure 23 corresponding to the bending area FA, where "corresponding" means that when the flexible display screen 1 is in the expanded state, a projection of the bending area FA in a horizontal plane overlaps a projection of the rotating shaft structure 23 in the horizontal plane. The flexible display screen 1 is switched between the unfolded state and the folded state through the rotating shaft structure 23. In addition, by arranging the buffer device 3 between the rotating shaft structure 23 and the bending area FA, the bending stress of the flexible display screen 1 during state switching can be effectively buffered.
Specifically, the cushion pad 31 of the buffering device 3 is an arc-shaped curved surface structure corresponding to the bending area FA and has a fixed curvature radius, and the telescopic elastic device 32 is further disposed between the rotating shaft structure 23 and the cushion pad 31, so that when the flexible display screen 1 is switched between the unfolding state and the bending state, the deformation amount of the bending radius of the bending area FA can be borne by the telescopic elastic device 32, and the cushion pad 31 and the backlight surface 12 of the flexible display screen 1 are always at least partially contacted but not connected, so that the bending radius of the flexible display screen 1 can be controlled while the flexible display screen 1 can be freely bent, and local sharpening stress of the bending area FA is concentrated.
In addition, blotter 31 is the curved surface contact with flexible display screen 1's backlight face 12, and for the line contact scheme among the prior art, bending zone FA atress is more even, and especially when flexible display screen 1's the degree of buckling is great, blotter 31's whole arc curved surface all contacts with flexible display screen 1's backlight face 12, is favorable to reducing bending zone FA's stress concentration problem, improves flexible display module's fatigue life.
In the flexible display module provided in the embodiment of the present invention, the buffer device 3 is disposed between the bending region FA of the flexible display screen 1 and the corresponding rotating shaft structure 23, wherein the buffer device 3 includes the buffer pad 31 and the elastic device 32, the buffer pad 31 is an arc-shaped curved surface structure corresponding to the bending region FA, and the elastic device 32 is telescopically connected between the rotating shaft structure 23 and the buffer pad 31. In the process that the flexible display screen 1 is unfolded or bent through the rotating shaft structure 23, the deformation in the bending process is borne through the telescopic elastic device 32, the cushion pad 31 is always at least partially contacted with the backlight surface 12 of the flexible display screen 1 but not connected with the backlight surface, so that the bending radius of the flexible display screen 1 can be controlled to be not too small while the flexible display screen 1 can be freely bent, local sharp stress concentration of a bending area FA is caused, the stress failure problem of the bending area FA of the flexible display screen 1 can be improved, and the fatigue life of the flexible display module is prolonged.
The following describes a specific structure of the flexible display module provided by the embodiment of the invention in detail with reference to the accompanying drawings.
As mentioned above, the cushion 31 has an arc-shaped curved structure. Optionally, the bending direction of the buffer pad 31 is consistent with the bending direction of the flexible display screen 1, and the curvature radius of the buffer pad 31 is a preset value. The preset value can be obtained through experimental verification or simulation analysis in advance according to factors such as the specific structure and the material of the flexible display screen 1.
In some embodiments, as shown in fig. 1 to 4, the bending axis S is located on the light emitting surface 11 side of the flexible display 1, that is, the flexible display 1 bends inward, and the light emitting surface 11 is located on the inner side. Alternatively, as shown in fig. 4, when the flexible display screen 1 is in the maximum bending state, the bending radius of the bending region FA is R0, the thickness of the bending region FA is L, and the curvature radius R of the buffer pad 31 satisfies the following condition: r is more than or equal to R0+ L.
As shown in fig. 1 and fig. 3, when the flexible display screen 1 is in the unfolded state, both ends of the cushion pad 3 along the arc length direction thereof are in contact with the backlight surface 12 of the flexible display screen 1. When flexible display screen 1 is in the state of buckling, the whole arc curved surface of blotter 31 is followed self arc length direction by both ends to the middle part contact with flexible display screen 1's 12 shady face gradually, and when flexible display screen 1 was folded completely, the whole arc curved surface of blotter 31 and flexible display screen 1's 12 whole contacts in the shady face.
When the flexible display screen 1 is switched from the unfolded state to the bent state, the whole arc-shaped curved surface of the cushion pad 3 gradually contacts with the backlight surface 12 of the flexible display screen 1, and a telescopic elastic device 32 is further arranged between the cushion pad 3 and the rotating shaft structure 23, so that the bending area FA is always supported by the buffer device 3. Therefore, when a user touches and operates the bending area FA of the flexible display screen 1, the collapse problem which can be perceived by the user does not occur at the part corresponding to the bending area FA, and the flexible display screen 1 is prevented from being damaged due to overlarge touch force.
In some embodiments, as shown in fig. 4, the buffer pad 31 includes a first film layer 311 and a second film layer 312, the second film layer 312 is located on a side of the first film layer 311 away from the flexible display screen 1, the first film layer 311 is made of foam, and the second film layer 312 is made of high molecular polymer. Optionally, the first film 311 and the second film 312 are bonded together by a bonding adhesive.
The foam has the characteristics of light weight, elasticity, free bending, low surface contact resistance and the like, and has small frictional resistance when contacting the flexible display screen 1. Optionally, the first film layer 311 is made of anti-static foam, so as to prevent static electricity from being generated during repeated contact and friction with the backlight surface 12 of the flexible display screen 1, which affects the electrical performance of the flexible display screen 1.
The second film layer 312 is a high molecular polymer, which has good mechanical properties, and can ensure that the cushion pad 31 has an arc-shaped curved surface structure which is not easy to deform. Alternatively, the high molecular polymer includes any one of Polyimide (PI), polyethylene terephthalate (PET), and Polyethylene naphthalate (PEN).
In some embodiments, as shown in fig. 4, the elastic device 32 includes a first sleeve 321, a second sleeve 322, and an elastic member 323, the first sleeve 321 is connected to the cushion pad 31, the second sleeve 322 is connected to the rotating shaft structure 23, and the elastic member 323 is disposed between the first sleeve 321 and the second sleeve 322. The first shaft sleeve 321 and the second shaft sleeve 322 are plastic parts or metal parts. Optionally, the first sleeve 321 and the second film 312 of the cushion pad 31 are integrally formed by injection molding. Alternatively, the second bushing 322 is welded to the shaft structure 23. The first and second bushings 321 and 322 may prevent the elastic member 323 from being bent away from the axial direction due to elastic deformation.
Further, one of the first and second bushings 321 and 322 is sleeved on an outer peripheral side of the other. For example, the second shaft sleeve 322 is sleeved on the outer periphery of the first shaft sleeve 321, or the first shaft sleeve 321 is sleeved on the outer periphery of the second shaft sleeve 322, which is determined according to the specific structure and will not be described again.
Optionally, the elastic member 323 is a spring. The spring is placed between the first and second bushings 321, 322. Because the first shaft sleeve 321 is connected with the cushion pad 31, the second shaft sleeve 322 is connected with the rotating shaft structure 23, and one of the first shaft sleeve 321 and the second shaft sleeve 322 is sleeved on the outer peripheral side of the other, an accommodating space which is movable only in the axial direction is formed between the first shaft sleeve 321 and the second shaft sleeve 322. The spring is placed in this accommodation space, and its both ends need not be connected with flexible display screen 1 or pivot structure 23 and also can not break away from this accommodation space and come back to rock, and simple structure easily realizes.
When the flexible display screen 1 is in the unfolding state, the flexible display screen 1 is parallel to the support frame 2. In order to prevent the bending region FA from being pushed up by the cushion pad 31, the cushion pad 31 is subjected to the elastic force of the spring as small as possible, and the spring is in a relatively free extended state and has a compressed length as small as possible. When the flexible display module is in the bending state, the spring is compressed between the rotating shaft structure 23 and the cushion pad 31 due to bending deformation, the compression length is increased, and the elasticity of the spring is also increased. Thus, in this embodiment, the elastic member 323 is a compression spring.
The elastic force F of the compression spring to the cushion 31 can be calculated according to the following formula:
F＝K×(L-L0)。
wherein, K is the stiffness coefficient of the spring, L0 is the initial length of the spring when the spring naturally extends, and L is the compression length of the spring. The design parameters of the spring, such as the stiffness coefficient K, the compression length, the initial length, the outer diameter and the like, can be determined according to the maximum elastic force of the flexible display screen 1 in the bending process, and are not described again.
Alternatively, the number of the elastic devices 32 is at least two, and at least two elastic devices 32 are arranged at intervals along the extending direction of the bending axis S. The number of the compression springs is determined according to the length of the bending shaft S of the flexible display screen 1 and the elastic force in the bending process, and the compression springs can be obtained in advance through experimental verification or simulation analysis and are not repeated.
Fig. 5 is a schematic structural diagram of the support frame of the flexible display module shown in fig. 1.
Referring to fig. 3 and 4, the supporting frame 2 further includes a first frame 21 and a second frame 22, the first frame 21 is used for supporting the first display area AA1, the second frame 22 is used for supporting the second display area AA2, and the rotating shaft structure 23 is hinged to the first frame 21 and the second frame 22 respectively, so as to unfold or bend the flexible display screen 1.
As an alternative embodiment, the rotating shaft structure 23 includes a rotating shaft 231, a damping block 233 and a slider 232. The axial direction of the rotating shafts 231 is parallel to the extending direction of the bending shaft S, the rotating shafts 231 are connected side by side through the damping block 233, and the two rotating shafts 231 located at the outermost sides are respectively connected to the first frame 21 and the second frame 22 in a sliding manner. Every two adjacent rotating shafts 231 are connected by a damping block 233, so that the first frame 21 and the second frame 22 can be bent to any angle when rotating. Alternatively, the elastic means 32 as described before may be connected with the damping mass 233.
In addition, a plurality of sliding blocks 232 are respectively arranged on the two rotating shafts 231 positioned at the outermost side, sliding holes are correspondingly arranged on the first frame 21 and the second frame 22, and the sliding blocks 232 are slidably arranged in the sliding holes. Optionally, the sliding block 232 includes a fixing portion and a sliding portion, the fixing portion is sleeved on the rotating shaft 231, one end of the sliding portion is telescopically connected to the fixing portion, and the other end of the sliding portion is slidably disposed in the sliding hole. In order to prevent the sliding part from falling out of the sliding hole, a blocking piece is arranged at one end of the sliding part, which is far away from the fixed part. The rotating shaft structure 23 is simple in structure, small in size and good in reliability, acting force cannot be generated on the first frame 21 and the second frame 22 in the bending process, and stress generated when the flexible display screen 1 is in the bending state can be effectively buffered.
It should be noted that, the embodiment of the present invention only discloses one embodiment of the rotating shaft structure 23 of the supporting frame 2, and other structures may be provided according to design requirements as long as the flexible display screen 1 can be unfolded or folded through the rotating shaft structure 23.
Fig. 6 is a schematic structural diagram illustrating a flexible display screen of a flexible display module according to an alternative embodiment of the present invention in an unfolded state, fig. 7 is a schematic structural diagram illustrating a region C in fig. 6 in an enlarged manner, fig. 8 is a schematic structural diagram illustrating a flexible display screen of a flexible display module illustrated in fig. 6 in a folded state, and fig. 9 is a schematic structural diagram illustrating a region D in fig. 8 in an enlarged manner.
Referring to fig. 6 to 9, an embodiment of the present invention further provides another flexible display module, which is similar to the flexible display module shown in fig. 1 to 5 in structure, except that the bending axis S is located on the backlight surface side of the flexible display screen 1, that is, the flexible display screen 1 is bent outward, the light emitting surface 11 is on the outside, and when the flexible display screen 1 is in the expanded state, the middle of the cushion pad 3 along the arc length direction thereof contacts the backlight surface 12. Accordingly, the bending direction of the buffer device 3 and the hinge structure 23 is opposite to that of the previous embodiment.
Optionally, the first film 311 is made of antistatic foam to prevent static electricity from being generated during repeated contact and friction with the backlight surface 12 of the flexible display screen 1, which affects electrical performance of the flexible display screen 1.
Optionally, the second film 312 is a high molecular polymer, which has a better mechanical property, and can ensure that the cushion pad 31 has an arc-shaped curved surface structure that is not easy to deform. The high molecular polymer includes any one of PI, PET, and PEN.
Alternatively, as shown in fig. 9, when the flexible display screen 1 is in the maximum bending state, the bending radius of the bending area FA is R0, the thickness of the bending area FA is L, and the curvature radius R of the buffer pad 31 satisfies the following condition: r is less than or equal to R0-L.
As shown in fig. 6 and 8, when the flexible display screen 1 is in the unfolded state, under the action of the elastic device 32, the middle of the cushion pad 3 along the arc length direction thereof contacts with the backlight surface 12 of the flexible display screen 1, so as to support the bending area FA of the flexible display screen 1.
When flexible display screen 1 is in the state of buckling, the whole arc curved surface of blotter 3 is by the middle part of self arc length direction to both ends gradually with the 12 contacts in the shady face of flexible display screen 1, and when flexible display screen 1 was folded completely, the whole arc curved surface of blotter 31 and the 12 whole contacts in the shady face of flexible display screen 1 for bending region FA has buffer 3 to support all the time. Therefore, when a user touches and operates the bending area FA of the flexible display screen 1, the collapse problem which can be perceived by the user does not occur at the part corresponding to the bending area FA, and the flexible display screen 1 is prevented from being damaged due to overlarge touch force.
It should be noted that, compared to the structure in which the light-emitting surface 11 of the flexible display module is bent inward in fig. 1 to 5, the light-emitting surface 11 of the flexible display module in this embodiment is bent outward, and for the flexible display module with the same size, the bending radius of the flexible display screen 1 is relatively larger, the curvature radius of the cushion pad 31 of the buffer device 3 is also larger, and the overall size of the rotating shaft structure 23 of the supporting frame 2 is relatively smaller. In addition, the elastic force of the elastic device 32 in this embodiment is relatively large, so the design parameters such as the stiffness coefficient and the compressible deformation dimension of the first shaft sleeve 321, the second shaft sleeve 322 and the elastic element 323 are relatively large, so as to meet the bending requirement of the flexible display screen 1.
Fig. 10 is a schematic structural diagram illustrating a flexible display screen of a flexible display module according to an alternative embodiment of the invention in an unfolded state.
Referring to fig. 10, another flexible display module is provided in an embodiment of the present invention, which is similar to the flexible display module shown in fig. 1 to 5, and the flexible display module is bent inward. The difference lies in that the flexible display screen 1 includes at least two bending regions FA, and correspondingly, the number of the rotating shaft structures 23 and the buffer devices 3 is at least two, so that the flexible display module can be bent at least twice, which is determined according to actual requirements.
It can be understood that the flexible display module in this embodiment is also suitable for the structure in which the flexible display module is bent outward as shown in fig. 6 to 9, so that the flexible display module can be bent at least twice, and details are not repeated.
In addition, the embodiment of the invention also provides a display device which comprises any one of the flexible display modules. The display device may be, for example, but not limited to, a cell phone, a tablet, a wearable device, and the like. This flexible display module assembly includes: flexible display screen 1, support frame 2 and buffer 3.
The flexible display screen 1 includes a bending area FA, and the flexible display screen 1 includes a light emitting surface 11 and a backlight surface 12 which are arranged in a back-to-back manner.
The support frame 2 is positioned on one side of the backlight surface 12 of the flexible display screen 1, the support frame 2 comprises a rotating shaft structure 23 corresponding to the bending area FA, and the flexible display screen 1 is unfolded or bent through the rotating shaft structure 23;
the buffer device 3 is disposed between the rotating shaft structure 23 and the bending region FA, the buffer device 3 includes a buffer pad 31 and an elastic device 32, the buffer pad 31 is an arc-shaped curved surface structure corresponding to the bending region FA, and the elastic device 32 is telescopically connected between the rotating shaft structure 23 and the buffer pad 31.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (12)
1. The utility model provides a flexible display module assembly which characterized in that includes:
the flexible display screen comprises a bending area, and the flexible display screen comprises a light-emitting surface and a backlight surface which are arranged in a back-to-back manner;
the supporting frame is positioned on one side of the backlight surface of the flexible display screen and comprises a rotating shaft structure corresponding to the bending area, and the flexible display screen is unfolded or bent through the rotating shaft structure;
the buffer device is arranged between the rotating shaft structure and the bending area and comprises a buffer pad and an elastic device, the buffer pad is an arc-shaped curved surface structure which corresponds to the bending area and has a fixed curvature radius, the elastic device is telescopically connected between the rotating shaft structure and the buffer pad, the buffer pad and the flexible display screen are always at least partially contacted but not connected,
the bending area can be bent around a bending shaft, the bending direction of the cushion pad is consistent with that of the flexible display screen, and the curvature radius of the cushion pad is a preset value.
2. The flexible display module of claim 1, wherein the bending axis is located on a side of a light emitting surface of the flexible display screen, and when the flexible display screen is in the unfolded state, two ends of the cushion pad along the arc length direction of the cushion pad are in contact with the backlight surface.
3. The flexible display module according to claim 2, wherein when the flexible display screen is in a maximum bending state, the bending radius of the bending region is R0, the thickness of the bending region is L, and the curvature radius R of the buffer pad satisfies the following condition: r is more than or equal to R0+ L.
4. The flexible display module of claim 1, wherein the bending axis is located on a backlight surface side of the flexible display screen, and when the flexible display screen is in the unfolded state, a middle portion of the cushion pad along an arc length direction of the cushion pad is in contact with the backlight surface.
5. The flexible display module according to claim 4, wherein when the flexible display screen is in the maximum bending state, the bending radius of the bending region is R0, the thickness of the bending region is L, and the curvature radius R of the buffer pad satisfies the following condition: r is less than or equal to R0-L.
6. The flexible display module of claim 1, wherein the buffer pad comprises a first film layer and a second film layer, the second film layer is located on a side of the first film layer away from the flexible display screen, the first film layer is made of foam, and the second film layer is made of any one of polyimide, polyethylene terephthalate, and polyethylene naphthalate.
7. The flexible display module of claim 1, wherein the elastic device comprises a first sleeve, a second sleeve and an elastic member, the first sleeve is connected to the buffer pad, the second sleeve is connected to the hinge structure, and the elastic member is disposed between the first sleeve and the second sleeve.
8. The flexible display module according to claim 7, wherein one of the first sleeve and the second sleeve is sleeved on an outer peripheral side of the other.
9. The flexible display module of claim 7, wherein the elastic member is a spring.
10. The flexible display module according to claim 1, wherein the number of the elastic devices is at least two, and at least two of the elastic devices are arranged at intervals along the extending direction of the bending axis.
11. The flexible display module according to claim 1, wherein the flexible display screen further comprises a first display area and a second display area, and the bending area is located between the first display area and the second display area; the support frame also comprises a first frame and a second frame, the first frame is used for supporting the first display area, the second frame is used for supporting the second display area, and the rotating shaft structure is hinged with the first frame and the second frame respectively so as to enable the flexible display screen to be unfolded or bent.
12. A display device comprising the flexible display module according to any one of claims 1 to 11.
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| CN113689789B (en) * | 2021-08-13 | 2023-05-09 | 武汉天马微电子有限公司 | Display device |
| CN118489131A (en) * | 2022-02-28 | 2024-08-13 | 夏普显示科技株式会社 | Foldable display |
| CN115457862B (en) * | 2022-08-25 | 2024-07-09 | 上海天马微电子有限公司 | Foldable display panel and display device |
| CN116071997B (en) * | 2022-10-28 | 2024-08-27 | 厦门天马显示科技有限公司 | Flexible display device |
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