CN113808490B

CN113808490B - Flexible display device

Info

Publication number: CN113808490B
Application number: CN202111116320.XA
Authority: CN
Inventors: 王宗元; 朱红
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2023-08-18
Anticipated expiration: 2041-09-23
Also published as: CN113808490A

Abstract

The disclosure provides a flexible display device, and relates to the technical field of display. In the embodiment of the disclosure, in the flexible display device capable of realizing the unfolding and rolling of the screen, at least part of the supporting piece of the first shell is provided with a first auxiliary piece, and one side, close to the scroll, of the sliding rolling area of the flexible display panel is correspondingly provided with a plurality of second auxiliary pieces, wherein magnetic adsorption can be generated between the second auxiliary pieces and the first auxiliary pieces. In the process of rolling up and unfolding the flexible display panel, the first auxiliary piece on the first shell can magnetically adsorb with the second auxiliary piece on the flexible display panel, which is close to the first auxiliary piece, so that the magnetic adsorption effect of the first shell on the flexible display panel can eliminate the arching trend of the flexible display panel caused by bending, thereby avoiding the phenomenon of uneven arching of the flexible display panel during bending.

Description

Flexible display device

Technical Field

The disclosure relates to the technical field of display, and in particular relates to a flexible display device.

Background

Compared with the traditional display screen, the flexible display screen has the remarkable advantages of being bendable, good in flexibility, light in size and thin and the like, and is a display screen which is widely focused in the field at present. The scroll screen is used as a flexible display screen which can be rolled up and unrolled according to the requirements of users, and brand-new human-computer interaction experience is provided.

The flexible screen of the scroll screen is formed by stacking a plurality of layers of structures, has a repulsive force, and releases the repulsive force when being bent, and generates an uneven arch phenomenon.

Disclosure of Invention

The present disclosure provides a flexible display device to solve the problem of the existing flexible screen generating a doming phenomenon when being bent.

In order to solve the above-described problems, the present disclosure provides a flexible display device including:

the first shell comprises an accommodating shell and a plurality of supporting pieces, wherein a scroll is arranged in the accommodating shell, the length direction of the scroll is a first direction, the supporting pieces are arranged in parallel along the first direction, one end of each supporting piece is connected with the accommodating shell, and at least part of each supporting piece is provided with a first auxiliary piece;

the second shell comprises a plurality of groove structures, the groove structures are in one-to-one correspondence with the supporting pieces, and the supporting pieces are inserted into the corresponding groove structures and are in sliding connection with the corresponding groove structures;

the flexible display panel comprises a fixed area and a sliding coil area which are connected, wherein the fixed area is fixed on the second shell, the sliding coil area is wound on the scroll, a plurality of second auxiliary pieces are arranged on one side, close to the scroll, of the sliding coil area, the second direction is perpendicular to the first direction, the plurality of second auxiliary pieces are arranged in parallel along the second direction, and magnetic adsorption can be generated between the second auxiliary pieces and the first auxiliary pieces.

Optionally, a clamping groove is formed in one side, close to the flexible display panel, of the supporting piece, a limiting structure is arranged at the edge of the clamping groove, and the first auxiliary piece is limited in the clamping groove by the limiting structure.

Optionally, the second direction includes a third direction along the accommodating case to the support member, along which a magnetic attraction between the first auxiliary member and the second auxiliary member gradually decreases.

Optionally, the material of the first auxiliary member is a magnetic material, and the magnetic force of the first auxiliary member gradually decreases along the third direction.

Optionally, the first auxiliary element comprises at least two discrete auxiliary sub-elements, the auxiliary sub-elements being divided into at least two columns of units along the third direction, the columns of units comprising at least one column of the auxiliary sub-elements, the first parameter of the first auxiliary element gradually decreasing along the third direction;

the first parameter includes at least one of the following parameters: the area of the auxiliary sub-piece on the first plane, the thickness of the auxiliary sub-piece in the fourth direction, the magnetic energy product of the material selected for the auxiliary sub-piece, and the number of the auxiliary sub-pieces in each row unit; the first direction and the second direction form the first plane, and the fourth direction is perpendicular to both the first direction and the second direction.

Optionally, the first auxiliary member is of a unitary structure, and the second parameter of the first auxiliary member is gradually reduced along the third direction;

the second parameter includes at least one of the following parameters: a width of the first auxiliary member in the first direction, and a thickness of the first auxiliary member in a fourth direction; the fourth direction is perpendicular to both the first direction and the second direction.

Optionally, the material of the second auxiliary member is a magnetic material, the first auxiliary member includes at least two auxiliary sub-members, the auxiliary sub-members are divided into at least two columns of units along the third direction, the columns of units include at least one column of the auxiliary sub-members, and the third parameter of the first auxiliary member is gradually reduced along the third direction;

the third parameter includes at least one of the following parameters: the area of the auxiliary sub-elements on the first plane, the thickness of the auxiliary sub-elements in the fourth direction, the ability of the material selected for the auxiliary sub-elements to be attracted by the magnetic material, and the number of auxiliary sub-elements in each of the column units; the first direction and the second direction form the first plane, and the fourth direction is perpendicular to both the first direction and the second direction.

Optionally, the reel includes a plurality of reels, the pivot direction of reel is the first direction, at least some reels and first auxiliary member are the same material.

Optionally, at least part of the groove structures are provided with sliding rail structures, the supporting piece is in sliding connection with the sliding rail structures, and the sliding rail structures are made of materials with low friction coefficients.

Optionally, the friction coefficient of the material of the sliding rail structure is greater than or equal to 0.01 and less than or equal to 0.2.

Optionally, the material of the sliding rail structure comprises at least one of polyoxymethylene and teflon.

Optionally, two side walls of the groove structure along the second direction are respectively provided with a slide rail groove, the slide rail structure comprises two slide rails, and the two slide rails are respectively embedded in the two slide rail grooves so as to limit the movement of the slide rail structure in a fourth direction, and the fourth direction is perpendicular to the first direction and the second direction at the same time;

the two ends of the sliding rail groove, which are close to and far away from the scroll, are respectively provided with a clamping groove, the two ends of the sliding rail, which are close to and far away from the scroll, are respectively provided with a clamping convex point, and the clamping convex point is in clamping connection with the clamping grooves so as to limit the sliding rail structure to move in the second direction;

And the two side edges of the support piece are provided with slide bar parts, and the slide bar parts can slide in the slide rail.

Optionally, the sliding rail structure further includes a plurality of connecting portions arranged in parallel along the second direction, and the sliding rails are connected through the plurality of connecting portions.

Optionally, the flexible display device further includes a pulley and a traction belt, a cavity is formed when the first housing is slidably connected with the second housing, the pulley and the traction belt are disposed in the cavity, the pulley is disposed parallel to the reel, the traction belt is wound around the pulley, one end of the traction belt is connected with one end of the sliding winding area away from the fixed area, and the other end of the traction belt is connected with the second housing;

when the supporting piece and the corresponding groove structure slide along the second direction, the distance between the pulley and the scroll is fixed;

when the support piece slides along the direction of drawing out the corresponding groove structure, the traction belt drives the flexible display panel to be unfolded, and when the support piece slides along the direction of inserting the support piece into the groove structure, the traction belt drives the flexible display panel to be rolled up.

Optionally, protruding structures are arranged between the groove structures and at the periphery of the groove structures, the tops of the protruding structures are in the same plane, and the fixing area is attached to the tops of the protruding structures.

Compared with the prior art, the method has the following advantages:

in the embodiment of the disclosure, in the flexible display device capable of realizing the unfolding and rolling of the screen, at least part of the supporting piece of the first shell is provided with a first auxiliary piece, and one side, close to the scroll, of the sliding rolling area of the flexible display panel is correspondingly provided with a plurality of second auxiliary pieces, wherein magnetic adsorption can be generated between the second auxiliary pieces and the first auxiliary pieces. In the process of rolling up and unfolding the flexible display panel, the first auxiliary piece on the first shell can magnetically adsorb with the second auxiliary piece on the flexible display panel, which is close to the first auxiliary piece, so that the magnetic adsorption effect of the first shell on the flexible display panel can eliminate the arching trend of the flexible display panel caused by bending, thereby avoiding the phenomenon of uneven arching of the flexible display panel during bending.

Drawings

FIG. 1 shows a schematic view of a flexible display device of an embodiment of the present disclosure in a rolled-up panel state;

FIG. 2 shows a schematic view of a flexible display device of an embodiment of the present disclosure in a panel unfolded state;

FIG. 3 shows a schematic view of a housing of a flexible display device of an embodiment of the present disclosure in a rolled-up-panel state;

FIG. 4 illustrates a schematic view of a housing of a flexible display device of an embodiment of the present disclosure in a panel expanded state;

FIG. 5 illustrates a cross-sectional view of a flexible display device of an embodiment of the present disclosure in a rolled-up panel state;

FIG. 6 illustrates a cross-sectional view of a flexible display device of an embodiment of the present disclosure in a panel unfolded state;

FIG. 7 illustrates a partial schematic view of a first housing at a perspective of an embodiment of the present disclosure;

FIG. 8 illustrates a partial schematic view of a first housing from another perspective of an embodiment of the present disclosure;

FIG. 9 illustrates a complete machine camber height curve generated after a conventional flexible display panel is wound around a reel;

FIG. 10 illustrates a schematic view of a first accessory according to an embodiment of the present disclosure;

FIG. 11 shows a schematic view of a second first aid of an embodiment of the present disclosure;

FIG. 12 shows a schematic view of a third first aid of an embodiment of the present disclosure;

FIG. 13 illustrates a partial schematic view of a third first auxiliary element of an embodiment of the present disclosure;

FIG. 14 illustrates a complete machine camber height curve generated after a flexible display panel of an embodiment of the present disclosure is wound around a reel;

FIG. 15 shows a comparative schematic of a magnetic attraction force of an embodiment of the disclosure;

FIG. 16 illustrates a comparative schematic of friction force of an embodiment of the present disclosure;

FIG. 17 illustrates a partial schematic view of a second housing at one perspective of an embodiment of the present disclosure;

FIG. 18 illustrates a partial schematic view of a second housing at another perspective of an embodiment of the present disclosure;

FIG. 19 illustrates a partial schematic view of a housing of a flexible display device in a panel unfolded state according to an embodiment of the disclosure;

fig. 20 illustrates a partial cross-sectional view of a housing of a flexible display device of an embodiment of the present disclosure in a panel rolled state.

Detailed Description

In order that the above-recited objects, features and advantages of the present disclosure will become more readily apparent, a more particular description of the disclosure will be rendered by reference to the appended drawings and appended detailed description.

Fig. 1 and 2 respectively show schematic views of a flexible display device of an embodiment of the present disclosure in a panel rolled state and in a panel unrolled state, fig. 3 and 4 respectively show schematic views of a case of the flexible display device of an embodiment of the present disclosure in a panel rolled state and in a panel unrolled state, and fig. 5 and 6 respectively show sectional views of the flexible display device of an embodiment of the present disclosure in a panel rolled state and in a panel unrolled state.

Referring to fig. 1 and 2, the flexible display device 1000 includes a first case 100, a second case 200, and a flexible display panel 300.

Referring to fig. 3 and 4, the first housing 100 includes a receiving housing 11 and a plurality of supporting members 12, a reel 13 is provided in the receiving housing 11, a length direction of the reel 13 is a first direction D1, the plurality of supporting members 12 are arranged in parallel along the first direction D1, one end of the supporting member 12 is connected to the receiving housing 11, and at least a portion of the supporting members 12 is provided with a first auxiliary member 14.

Referring to fig. 4, the second housing 200 includes a plurality of groove structures 21, the plurality of groove structures 21 are in one-to-one correspondence with the plurality of supports 12, and the supports 12 are inserted into the corresponding groove structures 21 and slidably coupled with the corresponding groove structures 21.

Referring to fig. 2, the flexible display panel 300 includes a fixing area 31 and a rolling area 32 connected, the fixing area 31 is fixed on the second housing 200, referring to fig. 5 and 6, the rolling area 32 is wound on the roller 13, referring to fig. 2, 5 and 6, a plurality of second auxiliary members 33 are disposed on one side of the rolling area 32 near the roller 13, the second direction D2 is perpendicular to the first direction D1, the plurality of second auxiliary members 33 are arranged in parallel along the second direction D2, and magnetic attraction can be generated between the second auxiliary members 33 and the first auxiliary members 14.

Wherein the support 122 of the first housing 100 can be inserted into the corresponding groove structure 21 of the second housing 200 to slidably connect the first housing 100 with the second housing 200, the flexible display device 1000 is a scroll screen. A portion of the flexible display panel 300 may be fixed to the second housing 200 and another portion may be wound around the reel 13. As the support 122 slides along the direction of drawing the groove structure 21, the first housing 100 and the second housing 200 slide in the gradually distant direction, and the sliding region 32 of the flexible display panel 100 wound around the reel 13 may be gradually unwound. As the supporting member 122 slides along the direction of inserting the groove structure 21, the first and second housings 100 and 200 slide in a gradually approaching direction, and thus the roll-up region 32 of the flexible display panel 100 may be gradually rolled up.

The first auxiliary member 14 is disposed on at least a portion of the supporting member 12 of the first housing 100, and a plurality of second auxiliary members 33 are disposed on a side of the sliding region 32 of the flexible display panel 300, which is close to the reel 13, wherein magnetic attraction can be generated between the second auxiliary members 33 and the first auxiliary member 14. In the process of rolling up and unrolling the flexible display panel 100 along the second direction D2, the first auxiliary member 14 on the first housing 100 can magnetically adsorb the second auxiliary member 33 on the flexible display panel 300, which is close to the first auxiliary member 14, so that the magnetic adsorption effect of the first housing 100 on the flexible display panel 300 can eliminate the doming trend of the flexible display panel 300 caused by bending, thereby avoiding the doming phenomenon of the flexible display panel 300 during bending.

For convenience of description, some directions and planes to which embodiments of the present disclosure will be referred later are described herein. The second direction D2 specifically includes a third direction D3 along the accommodating case 11 to the supporting member 12, i.e., a direction in which the supporting member 12 is inserted into the corresponding groove structure 21, and a fifth direction D5 along the supporting member 12 to the accommodating case 11, i.e., a direction in which the supporting member 12 is extracted from the corresponding groove structure 21. The fourth direction D4 is perpendicular to both the first direction D1 and the second direction D2. The first direction D1 and the second direction D2 form a first plane P1.

Fig. 7 and 8 show partial schematic views of the first housing 100 at different angles, respectively.

Alternatively, referring to fig. 7 and 8, a clamping groove 121 is provided on one side of the support 12 near the flexible display panel 300, a limiting structure 122 is provided on an edge of the clamping groove 121, and the first auxiliary member 14 is limited in the clamping groove 121 by the limiting structure 122. In this way, the movement of the first auxiliary element 14 in the fourth direction D4 is limited. In actual assembly, the first auxiliary piece 14 is inserted into the clamping groove 121, and the assembly is simple and convenient.

In addition, the supporting member 12 is provided with a clamping groove 121, and the first auxiliary member 14 is inserted into the clamping groove 121, and the limiting structure 122 on the clamping groove 121 can press the first auxiliary member 14 in the clamping groove 121, so that the first auxiliary member 14 is prevented from being lifted by magnetic attraction force to be separated from the supporting member 12. Compared with the way of sticking the first auxiliary member 14 by the back adhesive (the problem of easy glue opening and falling of the first auxiliary member 14 at normal temperature/high temperature) the clamping groove structure can ensure the reliability of the magnetic structure, thereby ensuring the stability of the magnetic adsorption force. In addition, for the case that the first auxiliary member 14 is of a split structure, the clamping groove structure not only plays a limiting role, but also facilitates adjustment of different split structure layouts according to different screens.

Alternatively, in the third direction D3, the magnetic attraction between the first auxiliary member 14 and the second auxiliary member 33 gradually decreases.

The first auxiliary member 14 is disposed on the first slidable housing 100, and since the flexible display panel 300 is resilient, the flexible display panel 300 after being slid out and extended can arch, so that the first auxiliary member 14 and the second auxiliary member 33 on the flexible display panel 300 can generate vertical attraction along the fourth direction D4, thereby tightly attaching the flexible display panel 300 to the upper surface of the supporting member of the first housing 100, and ensuring the flatness of the surface of the flexible display panel 300.

However, the magnetic attraction force inevitably generates sliding friction force between the flexible display panel 300 and the surface of the first housing 100, and the sliding friction force aggravates the difficulty of sliding, and the manual or electric sliding roll is adversely affected, so that the magnetic attraction force is not as large as possible.

Tests prove that under the condition that the flexible display panel is wound on the scroll (namely, the flexible display panel is bent), the arch amount of the flexible display panel is gradually changed. Fig. 9 shows a curve of the overall camber height of the conventional flexible display panel after winding the reel, and referring to fig. 9, the camber height of the flexible display panel is larger as the flexible display panel is closer to the reel, that is, the camber height near the reel is the largest, and gradually decreases as the distance from the reel increases.

Accordingly, in the embodiment of the present disclosure, the magnetic attraction between the first auxiliary member 14 and the second auxiliary member 33 can be gradually reduced in the third direction D3 (i.e., the direction away from the roller 13), so that the flatness of the developed portion of the flexible display panel can be ensured while reducing the amount of doming of the flexible display panel. In this way, the magnetic attraction force to the flexible display panel 300 can be adjusted to a size required for screen flatness, reducing unnecessary frictional resistance during the rolling and unrolling of the flexible display panel 300.

In a specific application, the magnetic attraction between the first auxiliary element 14 and the second auxiliary element 33 can be achieved in two ways, the first being that the first auxiliary element 14 is a magnet, i.e. a magnetic material is used, the second auxiliary element 33 is correspondingly made of a ferromagnetic material that can be attracted by a magnet, such as iron, cobalt, nickel, and the second being that the second auxiliary element 33 is a magnet, and the first auxiliary element 14 is correspondingly made of a ferromagnetic material that can be attracted by a magnet. These two implementations are described in detail below.

In a first alternative implementation, the material of the first auxiliary element 14 may be a magnetic material, and the magnetic force of the first auxiliary element 14 gradually decreases along the third direction D3.

The magnetic force of the first auxiliary element 14 having magnetic properties gradually decreases in the third direction D3, and this can be achieved by the following two embodiments.

Fig. 10 and 11 show schematic views of two first auxiliary elements 14, respectively.

Embodiment one: referring to fig. 10 and 11, the first auxiliary member 14 includes at least two discrete auxiliary sub-members 141, the auxiliary sub-members 141 being divided into at least two columns of units L in the third direction D3, the columns of units L including at least one column of auxiliary sub-members 141, the first parameter of the first auxiliary member 14 being gradually reduced in the third direction D3;

the first parameter comprises at least one of the following parameters: the area of the auxiliary sub-members 141 on the first plane P1, the thickness of the auxiliary sub-members 141 in the fourth direction D4, the magnetic energy product of the material selected for the auxiliary sub-members 141, and the number of auxiliary sub-members 141 in each column unit L.

In the first embodiment, the first auxiliary member 14 having magnetism may be a split structure in which the auxiliary member 141 having an area in the first plane P1 sequentially reduced, the auxiliary member 141 having a thickness in the fourth direction D4 sequentially reduced, the auxiliary member 141 made of a material having a magnetic energy product sequentially reduced, and the number of the auxiliary members 141 in each column unit L sequentially reduced may be employed in the third direction D3. Wherein the magnitude of the magnetic energy product is dependent on the magnet material selected.

Taking the example that the support 12 includes the positions A, B, C for arranging the 3 auxiliary sub-elements 141, referring to fig. 10, the 3 auxiliary sub-elements 141 are respectively a magnet a, a magnet b, and a magnet c along the third direction D3, where the areas of the magnet a, the magnet b, and the magnet c on the first plane P1 may be sequentially reduced, the thicknesses of the magnet a, the magnet b, and the magnet c in the fourth direction D4 may be sequentially reduced, or the magnetic energy product of the magnetic material selected by the magnet a, the magnet b, and the magnet c may be sequentially reduced.

Referring to fig. 11, it is also possible that the number of the auxiliary sub-units 141 included in the column units L1, L2, L3 is sequentially reduced, and illustratively, the column unit L1 includes a column where the position a is located, the column unit L2 includes a column where the position B is located, and the column unit L3 includes a column where the position C is located, that is, the column units L1, L2, L3 each include only one column of the auxiliary sub-units 141, 7 auxiliary sub-units 141 in the column unit L1, 4 auxiliary sub-units 141 in the column unit L2, and 3 auxiliary sub-units 141 in the column unit L3. Wherein the auxiliary sub-members 141 of each column may be arranged at equal intervals or as desired. The scheme can provide auxiliary sub-component 141 designs with different interval layouts, so that the magnetic attraction force just can keep the flatness of the screen, and the sliding friction resistance of the whole machine is reduced.

In fig. 10 and 11, the bottom of the card slot 121 is marked by a diagonal line pattern for convenience in distinguishing the auxiliary sub-component 141 from the bottom of the card slot 121.

Fig. 12 shows a schematic view of a third first auxiliary element 14, and fig. 13 shows a partial schematic view of the first auxiliary element 14 corresponding to fig. 12.

Embodiment two: referring to fig. 12 and 13, the first auxiliary element 14 is of unitary construction, and the second parameter of the first auxiliary element 14 gradually decreases in the third direction D3;

the second parameter includes at least one of the following parameters: the width of the first auxiliary member 14 in the first direction D1, and the thickness of the first auxiliary member 14 in the fourth direction D4; the fourth direction D4 is perpendicular to both the first direction D1 and the second direction D2.

In the second embodiment, the first auxiliary member 14 having magnetism may be of a unitary structure, in which the widths in the first direction D1 may be sequentially reduced in the third direction D3, or the thicknesses in the fourth direction D4 may be sequentially reduced.

For example, a first auxiliary member 14 having a trapezoid or triangle shape gradually changing may be provided, and referring to fig. 12 and 13, the area of the first auxiliary member 14 closer to the reel 13 is larger and the area farther from the reel 13 is smaller, so that gradual reduction of the magnetic attraction force may be achieved, while ensuring that the screen is sufficiently kept flat by the magnetic attraction force to be flatly attracted to the surface of the support member 12.

In particular applications, the thickness of the first auxiliary element 14 having magnetic properties may be set between 0.2 and 2mm, which may be preferred according to the characteristics of the screen resilience.

In a second alternative implementation, the material of the second auxiliary element 33 may be a magnetic material, the first auxiliary element 14 comprising at least two auxiliary sub-elements 141, the auxiliary sub-elements 141 being divided into at least two columns of units L along the third direction D3, the columns of units L comprising at least one column of auxiliary sub-elements 141, the third parameter of the first auxiliary element 14 decreasing gradually along the third direction D3;

the third parameter comprises at least one of the following parameters: the area of the auxiliary sub-members 141 on the first plane P1, the thickness of the auxiliary sub-members 141 in the fourth direction D4, the ability of the material selected for the auxiliary sub-members 141 to be attracted by the magnetic material, and the number of auxiliary sub-members 141 in each column unit L.

In this implementation, the first auxiliary member 14 having no magnetism may be a split structure in which, in the third direction D3, auxiliary sub-members 141 in which the area in the first plane P1 is sequentially reduced, auxiliary sub-members 141 in which the thickness in the fourth direction D4 is sequentially reduced, auxiliary sub-members 141 made of a material in which the ability to be attracted by a magnet is sequentially reduced, and the number of auxiliary sub-members 141 in each column unit L are sequentially reduced may be employed.

Continuing with fig. 10 as an example, the areas of the magnet a, the magnet b, and the magnet c on the first plane P1 may be sequentially reduced, the thicknesses of the magnet a, the magnet b, and the magnet c in the fourth direction D4 may be sequentially reduced, or the capacities of the materials selected by the magnet a, the magnet b, and the magnet c to be attracted by the magnet may be sequentially reduced. For example, when the iron content of the material 1, the material 2, and the material 3 is sequentially decreased, the magnet a may be prepared using the material 1, the magnet b may be prepared using the material 2, and the magnet c may be prepared using the material 3.

It will be appreciated that the manner of gradually reducing the magnetic attraction force may be overlapped according to circumstances, for example, along the third direction D3, and the area and thickness of the auxiliary sub-member 141 may be reduced at the same time, which is not particularly limited in the embodiment of the present disclosure.

Further, referring to fig. 10 to 12, a part of the supporting members 12 may be provided with the first auxiliary members 14, and another part of the supporting members 12 may not be provided with the first auxiliary members 14. The width of each support member 12 may be slightly different, alternatively, the support member 12 without the first auxiliary member 14 may be a plurality of thinner structures, the width of which may be smaller than the width of the support member 12 with the first auxiliary member 14, and the support member 12 without the first auxiliary member 14 may improve the strength of the support structure and the supporting force of the first housing 100. While the respective support members 12 provided with the first auxiliary members 14 may be of different widths, for example, the support members 12 at both ends may be the largest of all the support members 12, which is not particularly limited in the embodiment of the present invention.

Further alternatively, referring to fig. 12, the spool 13 includes a plurality of reels 131, the rotation axis direction of the reels 131 is the first direction D1, and at least a part of the reels 131 and the first auxiliary member 14 are of the same material.

In this case, since the amount of screen camber near the spool 13 is maximized, when the magnetic attraction force between the first auxiliary member 14 and the second auxiliary member 33 is insufficient to completely eliminate the amount of screen camber near the spool 13, at least part of the spool 131 may also be made of the same material as the first auxiliary member 14, so that at least part of the spool 131 and the second auxiliary member 33 may magnetically attract each other, and thus the camber tendency of the screen near the spool 13 may be eliminated.

For example, a roll 131 of the same material as the first auxiliary element 14 may be provided at intervals.

In practical applications, alternatively, referring to fig. 12 and 13, a plurality of partition plates 112 may be disposed in the accommodating case 11, and holes may be disposed on the partition plates 112, and a shaft core may be inserted into the holes, so that a plurality of winding drums 131 may be connected in series through the shaft core.

Referring to the curve of the overall camber height generated after the conventional flexible display panel is wound around the shaft, shown in fig. 9, the camber height is generally between 0.5 and 5 mm. Fig. 14 illustrates a complete machine camber height curve generated after the flexible display panel 300 of the embodiment of the present disclosure is wound around a reel, and the camber height may be controlled between 0 and 0.5 mm. As can be seen by comparison, the flexible display device provided by the embodiments of the present disclosure can avoid the phenomenon that the flexible display panel is curved and has uneven camber.

Fig. 15 shows a schematic diagram of magnetic attraction force comparison of the first auxiliary member 14 using magnets having equal attraction forces at respective positions and using magnets having gradual attraction forces at respective positions (the scheme illustrated in fig. 12).

Fig. 16 shows a change in friction force between the flexible display panel 300 and the surface of the support 12 of the first housing 100 during the process of the flexible display panel 300 being rolled based on the above two magnetic attraction forces. As can be seen from fig. 16, in the case of achieving the same flatness of the screen, the frictional resistance in the attraction force gradient magnetic attraction scheme becomes smaller gradually with increasing distance from the reel 13, and the total frictional force becomes smaller.

In practical application, the magnet design can be in other different shapes or combinations, or suction force and appearance design are carried out according to the curved rule of the arch height of the screen, so that the suction force is ensured to follow the change of the arch height of the screen, and the best balance between the suction force of the magnet, the flatness of the screen and low friction is achieved.

In addition, the inventors have also made the following improvements with respect to the sliding resistance between the first housing 100 and the second housing 200:

fig. 17 and 18 respectively show partial schematic views of the second housing 200 at different viewing angles, fig. 19 shows a partial schematic view of the housing of the flexible display device of the embodiment of the present disclosure in a panel-unfolded state, and fig. 20 shows a partial sectional view of the housing of the flexible display device of the embodiment of the present disclosure in a panel-rolled state.

Optionally, referring to fig. 17 to 20, at least part of the groove structure 21 is provided with a sliding rail structure 22, and the support member 12 is slidably connected to the sliding rail structure 22, and the sliding rail structure 22 is made of a low friction coefficient material.

In a specific application, the sliding between the first housing 100 and the second housing 200 is achieved by sliding between the support 12 and the groove structure 21. In practical use, the first and second housings 100 and 200 may be made of a metal material (e.g., an alloy) in consideration of the requirements for the characteristics of the housing such as hardness and colorability (the housing is an exterior housing). However, the metal shell has a high friction coefficient, the internal groove machining roughness is high, the machining precision is low, and the problem of sliding clamping is easily caused. Therefore, the sliding rail structure 22 may be disposed in at least part of the groove structure 21 of the second housing 200, so that the supporting member 12 is slidably connected with the sliding rail structure 22, and the sliding rail structure 22 may be made of a material with a low friction coefficient, thereby improving smoothness when the supporting member 12 slides with the groove structure 21, and avoiding sliding jamming between the first housing 100 and the second housing 200.

The coefficient of friction of the material of the sliding rail structure 22 may be greater than or equal to 0.01 and less than or equal to 0.2. Alternatively, the material of the slide rail structure 22 may include at least one of polyoxymethylene and teflon.

In the embodiment of the present disclosure, the sliding rail structure 22 may use a material with a low friction coefficient, such as polyoxymethylene, teflon, etc., different from that of the second housing 200, which can reduce friction resistance between metal housings, make sliding between the housings smooth and noiseless.

Specifically, referring to fig. 17 to 20, the two side walls of the groove structure 21 along the second direction D2 are respectively provided with a slide rail groove 212, and the slide rail structure 22 includes two slide rails 221, and the two slide rails 221 are respectively embedded in the two slide rail grooves 212 to limit the movement of the slide rail structure 22 in the fourth direction D4;

the two ends of the sliding rail groove 212, which are close to and far from the scroll 13, are respectively provided with a clamping groove 213, the two ends of the sliding rail 221, which are close to and far from the scroll 13, are respectively provided with a clamping convex point 222, and the clamping convex point 222 is in clamping connection with the clamping groove 213 so as to limit the sliding rail structure 22 to move in the second direction D2;

referring to fig. 19 and 20, both side edges of the support 12 are provided with slide bar parts 123, and the slide bar parts 123 are slidable in slide rails 221.

Wherein, can carry out spacingly through slide rail recess 212 to slide rail 221 to and carry out spacingly through block recess 213 to block bump 222, thereby can restrict slide rail structure 22 in fixed position, improved slide rail structure 22's position accuracy, and improved the connection reliability between slide rail structure 22 and the recess structure 21. Accordingly, the support 12 is a double sided slider support, and a larger width may be provided.

As shown in fig. 20, the support 12 may have a T-shaped cross section, and the protruding edges on both sides may be used as a sliding strip to slide along a sliding groove inside the sliding rail 221. The slide rail structure 22 can be subjected to single injection molding or in-mold injection molding, the machining precision can reach 0.005-0.01mm, which is far higher than the machining precision of the shell, and the sliding guidance of the shell is improved. Also, by forming the slider structure with the edge of the support 12, the slider can be integrated on the support 12, thereby saving the space for separately disposing the slider on the support 12.

Still alternatively, the sliding rail structure 22 further includes a plurality of connecting portions 223 arranged in parallel along the second direction D2, and the sliding rails 221 are connected by the plurality of connecting portions 223. Referring to fig. 17 to 19, the connecting portions 223 may be hollowed-out, so that the weight of the whole machine can be reduced.

In the embodiment of the disclosure, the comb-shaped supporting piece can be arranged, the sliding strip structure matched with the sliding rail structure is integrated on the supporting piece, the integration of sliding and supporting is realized through the supporting piece, the occupation of the whole machine space is reduced, the sliding guiding precision is improved, and the plane support can be provided for the flexible screen after being unfolded.

Further, in a specific application, the flexible display device 1000 may enable rolling up and unrolling of the flexible display panel 300 (i.e., sliding a screen) in a variety of ways, with the following providing an alternative implementation of implementing a screen sliding roll:

Referring to fig. 5 and 6, the flexible display device 1000 may further include a pulley 400 and a traction belt 500, a cavity is formed in which the pulley 400 and the traction belt 500 are disposed in a case where the first housing 100 is slidably coupled with the second housing 200, the pulley 400 is disposed parallel to the spool 13, the traction belt 500 is wound around the pulley 400, one end of the traction belt 500 is coupled with an end of the sliding region 32 remote from the fixed region 31 (i.e., an end of the sliding region 32 not coupled with the fixed region 31), and the other end of the traction belt 500 is coupled with the second housing 200.

The distance between the pulley 400 and the reel 13 is fixed while the support 12 and the corresponding groove structure 21 slide in the second direction D2. That is, during the rolling and unrolling of the flexible display panel 300, both the pulley 400 and the reel 13 move synchronously with the sliding of the first housing 100.

Referring to fig. 1, 3 and 5, when the support 12 slides in a direction of insertion into the corresponding groove structure 21 (i.e., the third direction D3), the traction belt 500 brings the flexible display panel 300 to roll up. Referring to fig. 2, 4 and 6, when the supporting member 12 slides in a direction of withdrawing the corresponding groove structure 21 (i.e., the fifth direction D5), the traction belt 500 drives the flexible display panel 300 to be unfolded.

The flexible display panel 300 can be stored in the whole machine around the scroll 13, the flexible display panel 300 can be tensioned and leveled by the traction belt 500 by bypassing the pulley 400, the interval between the scroll 13 and the pulley 400 is unchanged, and the flexible display panel 300 is synchronously slid out/retracted to drive the flexible display panel 300 to be unfolded/rolled up, so that the display area is switched.

As shown in fig. 1, 3 and 5, in the rolled state, the first housing 100 and the second housing 200 are embedded in each other with the upper surface flush. The back of the fixing area 31 of the flexible display panel 300 is fixedly connected (e.g., adhesively connected) to the second housing 200, the fixing area 31 is not connected to the first housing 100, and the sliding area 32 of the flexible display panel 300 is wound around the winding shaft 13 and is received in the interior of the whole machine.

As shown in fig. 2, 4 and 6, when the first casing 100 and the second casing 200 slide relatively, the sliding region 32 of the flexible display panel 300 can slide around the reel 13, so as to realize sliding out of the hidden screen inside the whole machine, and the flexible display panel 300 is unfolded, so that the display area is increased. After sliding out, the upper surfaces of the first and second housings 100 and 200 remain flush, which may provide effective support for the flexible display panel 300.

Still alternatively, referring to fig. 4, the protruding structures 23 are provided between and around the groove structures 21, the tops of the protruding structures 23 are in the same plane, and the fixing area 31 is attached to the top of the protruding structures 23.

The back surface of the fixing area 31 of the flexible display panel 300 may be adhered to the protruding plane between the groove structures 21 of the second housing 200 and the periphery, so as to enhance the firmness of the flexible display panel 300 during the unfolding and rolling processes.

The above embodiment is only an alternative embodiment for implementing the screen scroll, and in practical application, other embodiments may be also possible, for example, the flexible display panel 300 may be further unwound and rolled up by tensioning the tensioning device, which is not specifically limited in this disclosure.

It should be further noted that the flexible display device 1000 may further include some conventional structures not mentioned, some may be shown in the drawings, some may not be shown, and the related art may be referred to specifically, which is not specifically limited by the embodiments of the present disclosure.

For the foregoing method embodiments, for simplicity of explanation, the methodologies are shown as a series of acts, but one of ordinary skill in the art will appreciate that the present disclosure is not limited by the order of acts described, as some steps may occur in other orders or concurrently in accordance with the disclosure. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all of the preferred embodiments, and that the acts and modules referred to are not necessarily required by the present disclosure.

In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

Finally, it is further noted that relational terms such as first and second, and the like are 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. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

The foregoing has described in detail a flexible display device provided by the present disclosure, and specific examples have been presented herein to illustrate the principles and embodiments of the present disclosure, the above examples being provided only to assist in understanding the methods of the present disclosure and the core ideas thereof; meanwhile, as one of ordinary skill in the art will have variations in the detailed description and the application scope in light of the ideas of the present disclosure, the present disclosure should not be construed as being limited to the above description.

Claims

1. A flexible display device, comprising:

The flexible display panel comprises a fixed area and a sliding roll area which are connected, wherein the fixed area is fixed on the second shell, the sliding roll area is wound on the scroll, a plurality of second auxiliary pieces are arranged on one side, close to the scroll, of the sliding roll area, the second direction is perpendicular to the first direction, the plurality of second auxiliary pieces are arranged in parallel along the second direction, and magnetic adsorption can be generated between the second auxiliary pieces and the first auxiliary pieces;

wherein the second direction includes a third direction from the accommodating case to the supporting member, and a magnetic attraction between the first auxiliary member and the second auxiliary member is gradually reduced along the third direction.

2. The flexible display device according to claim 1, wherein a clamping groove is formed in a side, close to the flexible display panel, of the support member, a limiting structure is arranged on an edge of the clamping groove, and the first auxiliary member is limited in the clamping groove by the limiting structure.

3. The flexible display device of claim 1, wherein the material of the first auxiliary member is a magnetic material, and wherein the magnetic force of the first auxiliary member gradually decreases in the third direction.

4. A flexible display device as claimed in claim 3, wherein the first auxiliary element comprises at least two discrete auxiliary sub-elements, the auxiliary sub-elements being divided into at least two columns of cells along the third direction, the columns of cells comprising at least one column of the auxiliary sub-elements, the first parameter of the first auxiliary element decreasing gradually along the third direction;

5. A flexible display device as claimed in claim 3, wherein the first auxiliary member is of unitary construction, the second parameter of the first auxiliary member being progressively reduced along the third direction;

6. The flexible display device of claim 1, wherein the material of the second auxiliary member is a magnetic material, the auxiliary member being divided into at least two columns of units along the third direction, the columns of units including at least one column of the auxiliary members, the columns of units including at least one column, the third parameter of the first auxiliary member being gradually reduced along the third direction;

7. A flexible display device according to any one of claims 1 to 6, wherein the spool comprises a plurality of reels, the direction of rotation of the reels being in the first direction, at least part of the reels being of the same material as the first auxiliary member.

8. A flexible display device as claimed in claim 1, wherein at least part of the recess structure is provided with a sliding track structure, the support member being slidably connected to the sliding track structure, the sliding track structure being of a low friction material.

9. The flexible display device of claim 8, wherein a coefficient of friction of the material of the rail structure is greater than or equal to 0.01 and less than or equal to 0.2.

10. The flexible display device of claim 8, wherein the material of the rail structure comprises at least one of polyoxymethylene and teflon.

11. The flexible display device according to claim 8, wherein a slide rail groove is provided on each of two side walls of the groove structure along the second direction, the slide rail structure including two slide rails respectively embedded in the two slide rail grooves to restrict movement of the slide rail structure in a fourth direction perpendicular to both the first direction and the second direction;

12. The flexible display device of claim 11, wherein the rail structure further comprises a plurality of connection parts arranged in parallel along the second direction, and the rails are connected by the plurality of connection parts.

13. The flexible display device according to claim 1, further comprising a pulley and a traction belt, a cavity being formed in the case where the first housing is slidably connected to the second housing, the pulley and the traction belt being disposed in the cavity, the pulley being disposed parallel to the reel, the traction belt being wound around the pulley, one end of the traction belt being connected to one end of the slip-roll region remote from the fixed region, the other end of the traction belt being connected to the second housing;

14. A flexible display device as claimed in claim 1, wherein the recess structures have a protruding structure between and around the recess structures, the tops of the protruding structures being in the same plane, and the fixing area is attached to the tops of the protruding structures.