CN113808490A

CN113808490A - Flexible display device

Info

Publication number: CN113808490A
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: 2021-12-17
Anticipated expiration: 2041-09-23
Also published as: CN113808490B

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 unfolding and rolling up the screen, a first auxiliary member is disposed on at least a part of the support member of the first casing, and a plurality of second auxiliary members are correspondingly disposed on one side of the sliding rolling area of the flexible display panel close to the rolling shaft, wherein magnetic attraction can be generated between the second auxiliary members and the first auxiliary members. In the process of rolling up and unrolling at flexible display panel, first auxiliary member on the first casing can produce magnetic adsorption with the flexible display panel on be close to first auxiliary member's second auxiliary member, so, the magnetic adsorption effect that first casing produced flexible display panel can eliminate flexible display panel because of the hunch-up trend that the bending produced to flexible display panel has been avoided producing the phenomenon of hunch-up injustice when the bending.

Description

Flexible display device

Technical Field

The present disclosure relates to the field of display technologies, and in particular, 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 and thin in size and the like, and is a display screen which is widely concerned in the field at present. The scroll screen is used as a flexible display screen which can be rolled up and unfolded according to the requirements of a user, and brand-new human-computer interaction experience is provided.

The flexible screen of the scroll screen is formed by stacking a plurality of layers and has bounce, and when the flexible screen is bent, the bounce can be released by the flexible screen, and the phenomenon of uneven arching can be generated.

Disclosure of Invention

The present disclosure provides a flexible display device to solve the problem of the existing flexible screen that generates the phenomenon of uneven arching when bending.

In order to solve the above 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 reel is arranged in the accommodating shell, the length direction of the reel 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 the supporting pieces are provided with first auxiliary pieces;

the second shell comprises a plurality of groove structures, the groove structures correspond to the support pieces one by one, and the support pieces are inserted into the corresponding groove structures and are connected with the corresponding groove structures in a sliding mode;

flexible display panel, including the fixed area of connection and smooth book district, the fixed area is fixed on the second casing, smooth book district around rolling up in the spool, smooth book district is close to one side of spool is provided with a plurality of second auxiliary members, the second direction perpendicular to first direction, a plurality of second auxiliary members are followed second direction parallel arrangement, the second auxiliary member with can produce magnetic adsorption each other between the first auxiliary member.

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 from the accommodating case to the support, and the magnetic attraction between the first auxiliary and the second auxiliary is gradually reduced along the third direction.

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 member includes at least two discrete auxiliary sub members, the auxiliary sub members are divided into at least two column units along the third direction, the column units include at least one column of the auxiliary sub members, and the first parameter of the first auxiliary member gradually decreases along the third direction;

the first parameter comprises at least one of the following parameters: the area of the auxiliary sub-element on the first plane, the thickness of the auxiliary sub-element in the fourth direction, the magnetic energy product of the selected material of the auxiliary sub-element and the number of the auxiliary sub-elements in each column 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 an integral structure, and the second parameter of the first auxiliary member gradually decreases along the third direction;

the second parameter comprises at least one of the following parameters: a width of the first auxiliary in the first direction, and a thickness of the first auxiliary 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 column units along the third direction, the column units include at least one column of the auxiliary sub members, and the third parameter of the first auxiliary member gradually decreases along the third direction;

the third parameter comprises at least one of the following parameters: the area of the auxiliary sub-element on the first plane, the thickness of the auxiliary sub-element in the fourth direction, the attraction capacity of the selected material of the auxiliary sub-element to the magnetic material, and the number of the auxiliary sub-elements in each column 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 reel includes a plurality of reels, the rotation axis direction of the reels is the first direction, and at least a part of the reels and the first auxiliary member are made of the same material.

Optionally, at least part of the groove structures is provided with a sliding rail structure, the supporting member is connected with the sliding rail structure in a sliding manner, and the sliding rail structure is made of a low-friction-coefficient material.

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 slide rail structure includes 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 includes two slide rails, the two slide rails are respectively embedded in the two slide rail grooves to limit movement of the slide rail structure in a fourth direction, and the fourth direction is perpendicular to the first direction and the second direction;

clamping grooves are respectively formed in two ends, close to the scroll, of the slide rail groove and two ends, far away from the scroll, of the slide rail, clamping convex points are respectively arranged at two ends, close to the scroll, of the slide rail and two ends, far away from the scroll, of the slide rail, and the clamping convex points are connected with the clamping grooves in a clamping mode so as to limit the slide rail structure to move in the second direction;

and the edges of two sides of the supporting piece are provided with slide bar parts which can slide in the slide rails.

Optionally, the slide rail structure further includes a plurality of connecting portions arranged in parallel along the second direction, and the slide rails are connected to each other 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 to the second housing, the pulley and the traction belt are disposed in the cavity, the pulley is disposed parallel to the winding shaft, the traction belt is wound around the pulley, one end of the traction belt is connected to one end of the winding sliding region, which is far away from the fixing region, and the other end of the traction belt is connected to the second housing;

when the supporting piece and the corresponding groove structure slide along the second direction, the distance between the pulley and the reel 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 unfold, and when the support piece slides along the direction of inserting the corresponding groove structure, the traction belt drives the flexible display panel to roll up.

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

Compared with the prior art, the present disclosure includes the following advantages:

in the embodiment of the disclosure, in the flexible display device capable of unfolding and rolling up the screen, a first auxiliary member is disposed on at least a part of the support member of the first casing, and a plurality of second auxiliary members are correspondingly disposed on one side of the sliding rolling area of the flexible display panel close to the rolling shaft, wherein magnetic attraction can be generated between the second auxiliary members and the first auxiliary members. In the process of rolling up and unrolling at flexible display panel, first auxiliary member on the first casing can produce magnetic adsorption with the flexible display panel on be close to first auxiliary member's second auxiliary member, so, the magnetic adsorption effect that first casing produced flexible display panel can eliminate flexible display panel because of the hunch-up trend that the bending produced to flexible display panel has been avoided producing the phenomenon of hunch-up injustice when the bending.

Drawings

Fig. 1 shows a schematic view of a flexible display device of an embodiment of the present disclosure in a panel rolled 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 according to an embodiment of the present disclosure in a panel rolled state;

fig. 4 shows a schematic housing view of a flexible display device of an embodiment of the present disclosure in a panel unfolded state;

fig. 5 shows a cross-sectional view of a flexible display device of an embodiment of the present disclosure in a panel rolled 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 from one perspective of an embodiment of the disclosure;

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

FIG. 9 illustrates a graph of the overall doming height of a prior art flexible display panel after being wound around a reel;

FIG. 10 illustrates a schematic view of a first auxiliary element of an embodiment of the present disclosure;

FIG. 11 illustrates a schematic view of a second first auxiliary element of an embodiment of the present disclosure;

FIG. 12 illustrates a schematic view of a third first auxiliary element 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 total dome height curve generated after a flexible display panel of an embodiment of the present disclosure is wound around a spool;

FIG. 15 shows a comparative schematic of magnetic attraction forces of embodiments of the present disclosure;

FIG. 16 illustrates a comparative graphical representation of friction force of embodiments of the present disclosure;

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

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

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

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

Detailed Description

In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, the present disclosure is described in further detail with reference to the accompanying drawings and the detailed description.

Fig. 1 and 2 respectively show schematic diagrams of a flexible display device according to an embodiment of the present disclosure in a panel rolled-up state and a panel unrolled state, fig. 3 and 4 respectively show schematic diagrams of a housing of a flexible display device according to an embodiment of the present disclosure in a panel rolled-up state and a panel unrolled state, and fig. 5 and 6 respectively show cross-sectional diagrams of a flexible display device according to an embodiment of the present disclosure in a panel rolled-up state and a panel unrolled state.

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

Referring to fig. 3 and 4, the first casing 100 includes a housing casing 11 and a plurality of supporting members 12, a winding shaft 13 is disposed in the housing casing 11, a length direction of the winding shaft 13 is a first direction D1, the plurality of supporting members 12 are arranged in parallel along the first direction D1, one end of each supporting member 12 is connected to the housing casing 101, and at least a part of the supporting members 12 are disposed 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 correspond to the plurality of supports 12 one by one, and the supports 12 are inserted into the corresponding groove structures 21 and slidably connected to the corresponding groove structures 21.

Referring to fig. 2, the flexible display panel 300 includes a fixing region 31 and a sliding roll region 32 connected to each other, the fixing region 31 is fixed to the second housing 200, referring to fig. 5 and 6, the sliding roll region 32 is wound around the winding shaft 13, referring to fig. 2, 5 and 6, a plurality of second auxiliary members 33 are disposed on one side of the sliding roll region 32 close to the winding shaft 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 may be generated between the second auxiliary members 33 and the first auxiliary member 14.

In the flexible display device 1000, i.e. a scroll screen, the supporting member 122 of the first casing 100 can be inserted into the corresponding groove structure 21 of the second casing 200, so that the first casing 100 and the second casing 200 are slidably connected. A portion of the flexible display panel 300 may be fixed on the second housing 200, and another portion may be wound around the reel 13. As the supporting member 122 slides along the direction of withdrawing the groove structure 21, the first casing 100 and the second casing 200 slide in a gradually separating direction, and the flexible display panel 100 can be gradually unwound around the winding area 32 of the winding shaft 13. As the support 122 slides in the direction of inserting into the groove structure 21, the first casing 100 and the second casing 200 slide in a gradually approaching direction, and the roll-sliding region 32 of the flexible display panel 100 can be gradually rolled up.

At least a part of the supporting members 12 of the first casing 100 is provided with a first auxiliary member 14, and a plurality of second auxiliary members 33 are correspondingly provided on one side of the sliding roll area 32 of the flexible display panel 300 close to the rolling shaft 13, wherein the second auxiliary members 33 and the first auxiliary member 14 can generate magnetic attraction with each other. In the process that the flexible display panel 100 is rolled up and unrolled along the second direction D2, the first auxiliary element 14 on the first casing 100 and the second auxiliary element 33 on the flexible display panel 300, which is close to the first auxiliary element 14, may generate magnetic attraction, so that the magnetic attraction generated by the first casing 100 on the flexible display panel 300 may eliminate the arching tendency of the flexible display panel 300 due to bending, thereby avoiding the arching unevenness phenomenon of the flexible display panel 300 when bending.

For convenience of description, some directions and planes will be described later in the embodiments of the present disclosure. The second direction D2 specifically includes a third direction D3 along the accommodating shell 11 to the supporting member 12, and a fifth direction D5 along the supporting member 12 to the accommodating shell 11, wherein the third direction D3 is a direction in which the supporting member 12 is inserted into the corresponding groove structure 21, and the fifth direction D5 is a direction in which the supporting member 12 is pulled out of 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 respectively show a partial schematic view of the first housing 100 at different viewing angles.

Optionally, referring to fig. 7 and 8, a clamping groove 121 is disposed on a side of the supporting member 12 close to the flexible display panel 300, a limiting structure 122 is disposed at 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 manner, movement of the first auxiliary 14 in the fourth direction D4 is restricted. During actual assembly, the first auxiliary part 14 is inserted into the clamping groove 121, and the assembly is simple and convenient.

In addition, a clamping groove 121 is formed in the supporting member 12, 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 and being separated from the supporting member 12. Compared with the mode of sticking the first auxiliary part 14 on the back adhesive (which easily causes the problem that the first auxiliary part 14 is glued and falls off at normal temperature/high temperature), the card slot structure can ensure the reliability of the magnetic attraction structure, thereby ensuring the stability of the magnetic attraction force. In addition, for the case that the first auxiliary member 14 is a split structure, the slot structure not only has a limiting effect, 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 14 and the second auxiliary 33 gradually decreases.

The first auxiliary member 14 is disposed on the slidable first housing 100, and the slidable and extendable flexible display panel 300 has a bounce force, so that the slidable and extendable flexible display panel 300 is arched, and therefore, 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, so that the flexible display panel 300 is tightly attached to the upper surface of the supporting member of the first housing 100, and the flatness of the surface of the flexible display panel 300 is ensured.

However, the magnetic attraction inevitably generates sliding friction between the flexible display panel 300 and the surface of the first housing 100, which increases the difficulty of sliding and adversely affects manual or electric sliding, and therefore, the larger the magnetic attraction is, the better the sliding is.

Tests prove that the arching amount of the flexible display panel is gradually changed under the condition that the flexible display panel is wound on a reel (namely the flexible display panel is bent). Fig. 9 shows a curve of the total arching height of the conventional flexible display panel after being wound around the reel, and referring to fig. 9, it can be known that the arching height of the flexible display panel is larger as the flexible display panel is closer to the reel, that is, the arching height near the reel is the largest, and the arching height of the flexible display panel gradually decreases as the distance from the reel increases.

Therefore, in the embodiment of the present disclosure, the magnetic attraction between the first auxiliary 14 and the second auxiliary 33 may be gradually reduced along the third direction D3 (i.e., the direction away from the reel 13), so that the flatness of the unrolled portion of the flexible display panel may 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 magnitude 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 member 14 and the second auxiliary member 33 can be achieved by two ways, namely, the first auxiliary member 14 is a magnet, that is, a magnetic material, correspondingly, the second auxiliary member 33 is a ferromagnetic material capable of being attracted by the magnet, for example, iron, cobalt, or nickel, and the second auxiliary member 33 is a magnet, correspondingly, the first auxiliary member 14 is a ferromagnetic material capable of being attracted by the 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 is gradually reduced along the third direction D3.

Here, the magnetic force of the magnetic first auxiliary member 14 is gradually reduced along the third direction D3, which can be realized by the following two embodiments.

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

The first implementation mode comprises the following steps: referring to fig. 10 and 11, the first auxiliary member 14 includes at least two discrete auxiliary members 141, the auxiliary members 141 being divided into at least two column units L along the third direction D3, the column units L including at least one column of auxiliary members 141, the first parameter of the first auxiliary member 14 gradually decreasing along the third direction D3;

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

In the first embodiment, the first auxiliary element 14 having magnetism may be a split structure, in which, in the third direction D3, the auxiliary element 141 having an area sequentially decreasing in the first plane P1, the auxiliary element 141 having a thickness sequentially decreasing in the fourth direction D4, the auxiliary element 141 made of a material having a sequentially decreasing magnetic energy product, and the number of the auxiliary elements 141 in each column unit L may be sequentially decreased. Wherein the magnitude of the magnetic energy product is related to the selected magnet material.

Taking the position A, B, C for arranging the 3 auxiliary sub-elements 141 on the supporting member 12 as an example, 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, wherein 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, and the magnetic energy products of the magnetic materials selected by the magnet a, the magnet b, and the magnet c may be sequentially reduced.

Referring to fig. 11, the number of auxiliary sub-elements 141 included in column units L1, L2, and L3 may also be reduced in sequence, and illustratively, column unit L1 includes a column at position a, column unit L2 includes a column at position B, and column unit L3 includes a column at position C, that is, column units L1, L2, and L3 each include only one column of auxiliary sub-elements 141, 7 auxiliary sub-elements 141 in column unit L1, 4 auxiliary sub-elements 141 in column unit L2, and 3 auxiliary sub-elements 141 in column unit L3. Wherein, the auxiliary sub-elements 141 of each column can be arranged at equal intervals or according to the requirement. The scheme can provide the design of auxiliary sub-parts 141 with different spacing layouts, so that the magnetic adsorption force can just keep the flatness of the screen, and the sliding friction resistance of the whole machine is reduced.

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

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

The second embodiment: referring to fig. 12 and 13, the first auxiliary member 14 is a unitary structure, and the second parameter of the first auxiliary member 14 is gradually decreased along the third direction D3;

the second parameter includes at least one of the following parameters: a width of the first auxiliary 14 in the first direction D1, and a thickness of the first auxiliary 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 a unitary structure, wherein, along the third direction D3, a unitary structure in which the width in the first direction D1 is sequentially reduced may be adopted, and a unitary structure in which the thickness in the fourth direction D4 is sequentially reduced may be adopted.

Illustratively, a trapezoidal or triangular gradually-changed first auxiliary member 14 may be provided, and referring to fig. 12 and 13, the area of the first auxiliary member 14 closer to the roller 13 is larger, and the area of the first auxiliary member 14 farther from the roller 13 is smaller, so that the gradual reduction of the magnetic attraction force can be realized, and at the same time, the screen can be ensured to be kept flat enough under the action of the magnetic attraction force, so that the screen is flatly attracted to the surface of the support member 12.

In a specific application, the thickness of the magnetic first auxiliary member 14 may be set to be 0.2-2 mm, and is preferably selected according to the screen bounce characteristic.

In a second alternative implementation, the material of the second auxiliary element 33 may be a magnetic material, the first auxiliary element 14 includes at least two auxiliary elements 141, the auxiliary elements 141 are divided into at least two column units L along the third direction D3, the column units L include at least one column of auxiliary elements 141, and the third parameter of the first auxiliary element 14 gradually decreases along the third direction D3;

the third parameter includes at least one of the following parameters: the area of the auxiliary sub-element 141 in the first plane P1, the thickness of the auxiliary sub-element 141 in the fourth direction D4, the ability of the selected material of the auxiliary sub-element 141 to be attracted by the magnetic material, and the number of auxiliary sub-elements 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 members 141 having areas sequentially decreasing in the first plane P1, auxiliary members 141 having thicknesses sequentially decreasing in the fourth direction D4, auxiliary members 141 made of materials having a sequentially decreasing ability to be attracted by a magnet, and the number of auxiliary members 141 in each column unit L may be sequentially decreased.

Continuing with fig. 10 as an example, the areas of the magnet a, the magnet b, and the magnet c in the first plane P1 may be sequentially decreased, the thicknesses of the magnet a, the magnet b, and the magnet c in the fourth direction D4 may be sequentially decreased, and the attraction capability of the selected materials of the magnet a, the magnet b, and the magnet c to the magnet may be sequentially decreased. For example, if the iron contents of material 1, material 2, and material 3 decrease in this order, magnet a may be made of material 1, magnet b may be made of material 2, and magnet c may be made of material 3.

It is understood that the above-mentioned manner of gradually reducing the magnetic attraction force may be used in an overlapping manner according to specific situations, for example, along the third direction D3, and the area and the thickness of the auxiliary sub-element 141 may be reduced at the same time, which is not particularly limited by the embodiment of the present disclosure.

In addition, referring to fig. 10 to 12, a part of the supporting member 12 may be provided with the first auxiliary member 14, and another part of the supporting member 12 may not be provided with the first auxiliary member 14. The width of each supporting member 12 may be slightly different, and optionally, the supporting members 12 without the first auxiliary member 14 may be a plurality of thin structures, and the width of each supporting member may be smaller than the width of the supporting member 12 with the first auxiliary member 14, and the supporting members 12 without the first auxiliary member 14 may improve the strength of the supporting structure, and improve the supporting force of the first casing 100. The width of each support 12 provided with the first auxiliary member 14 may also be different, for example, the support 12 at both ends may be the largest width among all the supports 12, and the embodiment of the present invention is not limited in this respect.

Further alternatively, referring to fig. 12, the winding shaft 13 includes a plurality of winding drums 131, the rotating shaft direction of the winding drums 131 is the first direction D1, and at least a portion of the winding drums 131 and the first auxiliary member 14 are made of the same material.

Wherein, because the amount of the arching of the screen near the scroll 13 is the largest, when the magnetic attraction between the first auxiliary member 14 and the second auxiliary member 33 is not enough to completely eliminate the amount of the arching of the screen near the scroll 13, at least part of the winding drum 131 can also be made of the same material as the first auxiliary member 14, so that at least part of the winding drum 131 can also be magnetically attracted to the second auxiliary member 33, and the arching tendency of the screen near the scroll 13 can be eliminated.

For example, the rolls 131 of the same material as the first auxiliary member 14 may be provided at intervals.

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

Referring to a curve of the total arching height generated by the conventional flexible display panel after being pivoted, the arching height is generally between 0.5mm and 5mm, as shown in fig. 9. FIG. 14 shows a total arching height curve generated after the flexible display panel 300 is wound around a reel, wherein the arching height can be controlled between 0 mm and 0.5 mm. By contrast, the flexible display device provided by the embodiment of the disclosure can avoid the phenomenon that the flexible display panel is arched and uneven when being bent.

Fig. 15 is a schematic diagram showing a comparison of magnetic attraction forces of the first auxiliary member 14 using magnets having equal attraction forces at different positions and magnets having gradually changed attraction forces at different positions (the example in fig. 12).

Fig. 16 shows a change in the friction force between the flexible display panel 300 and the surface of the support 12 of the first housing 100 during the sliding and rolling of the flexible display panel 300 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 suction gradient magnetic attraction scheme is gradually reduced with increasing distance from the reel 13, and the total frictional force is smaller.

In practical application, the magnet design can be in other different shapes or combinations, or the suction force and the appearance design are carried out according to the curve rule of the arching height of the screen, so that the suction force is ensured to change along with the arching height of the screen, and the optimal balance among the magnet suction force, the flatness of the screen and the low friction is achieved.

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

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

Alternatively, referring to fig. 17 to 20, at least a portion of the groove structure 21 is provided with a sliding rail structure 22, the supporting member 12 is slidably connected to the sliding rail structure 22, and the sliding rail structure 22 is made of a low friction 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, a metal material (e.g., an alloy) may be used for the first case 100 and the second case 200 in consideration of requirements for characteristics such as hardness and colorability of the cases (cases as exterior cases). However, the metal case has a high friction coefficient, high inner groove machining roughness, and low machining accuracy, and is likely to cause a problem of sliding seizure. Therefore, the sliding rail structure 22 may be disposed in at least a portion of the groove structure 21 of the second housing 200, so that the supporting member 12 is slidably connected to the sliding rail structure 22, and the sliding rail structure 22 may be made of a material with a low friction coefficient, thereby improving the smoothness of the sliding between the supporting member 12 and the groove structure 21, and preventing the sliding between the first housing 100 and the second housing 200 from being jammed.

The friction coefficient of the material of the slide 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 slide rail structure 22 may be made of a material with a low friction coefficient different from that of the second housing 200, such as polyoxymethylene, teflon, etc., which can reduce the friction resistance between the metal housings, so that the sliding between the housings is 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, 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 slide rail groove 212 close to and far from the reel 13 are respectively provided with a clamping groove 213, the two ends of the slide rail 221 close to and far from the reel 13 are respectively provided with a clamping convex point 222, and the clamping convex points 222 are clamped and connected with the clamping grooves 213 to limit the movement of the slide rail structure 22 in the second direction D2;

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

The slide rail 221 can be limited by the slide rail groove 212, and the engaging protrusion 222 can be limited by the engaging groove 213, so that the slide rail structure 22 can be limited at a fixed position, the position accuracy of the slide rail structure 22 is improved, and the connection reliability between the slide rail structure 22 and the groove structure 21 is improved. Accordingly, the support 12 is a double-sided slider support, which can be provided with a larger width.

As shown in fig. 20, the supporting member 12 may have a T-shaped cross section, and the two protruding edges may be used as sliding strips to slide along the sliding grooves inside the sliding rails 221. The slide rail structure 22 can be used for independent injection molding or in-mold injection molding, the machining precision can reach 0.005-0.01mm, which is far higher than that of the shell, and the sliding guidance of the shell is improved. Also, the slider may be integrated on the support 12 by forming the slider structure using the edge of the support 12, thereby saving a space for separately providing the slider on the support 12.

Still optionally, the slide rail structure 22 further includes a plurality of connecting portions 223 arranged in parallel along the second direction D2, and the slide rails 221 are connected with each other through the plurality of connecting portions 223. Referring to fig. 17 to 19, the connection portions 223 may be hollow, so that the overall weight 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 planar support can be provided for the unfolded flexible screen.

Furthermore, in a specific application, the flexible display device 1000 may implement the rolling and unrolling of the flexible display panel 300 (i.e. the sliding rolling of the screen) in a plurality of ways, and the following provides an alternative implementation of the sliding rolling of the screen:

referring to fig. 5 and 6, the flexible display device 1000 may further include a pulley 400 and a traction belt 500, the first housing 100 is slidably coupled to the second housing 200 to form a cavity, the pulley 400 and the traction belt 500 are disposed in the cavity, the pulley 400 is disposed parallel to the winding shaft 13, the traction belt 500 is wound around the pulley 400, one end of the traction belt 500 is coupled to one end of the winding slip region 32 away from the fixing region 31 (i.e., one end of the winding slip region 32 not coupled to the fixing region 31), and the other end of the traction belt 500 is coupled to the second housing 200.

The distance between the pulley 400 and the spool 13 is fixed when 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, the pulley 400 and the scroll 13 both move synchronously with the sliding of the first housing 100.

Referring to fig. 1, 3 and 5, when the support 12 slides in the direction of inserting into the corresponding groove structure 21 (i.e., the third direction D3), the flexible display panel 300 is rolled up by the pulling tape 500. Referring to fig. 2, 4 and 6, when the support 12 slides in a direction of withdrawing the corresponding groove structure 21 (i.e., the fifth direction D5), the flexible display panel 300 is unfolded by the pulling belt 500.

The flexible display panel 300 can be accommodated in the whole machine around the reel 13, and the flexible display panel 300 can be tensioned and stretched flat by winding the traction belt 500 around the pulley 400, and the flexible display panel 300 can be synchronously slid out/retracted to drive the flexible display panel 300 to be unfolded/rolled up, so that the switching of display areas is realized.

As shown in fig. 1, 3 and 5, in the rolled state, the first casing 100 and the second casing 200 are fitted into each other with their upper surfaces flush. The back of the fixing area 31 of the flexible display panel 300 is fixedly connected (e.g., adhesively connected) with the second housing 200, the fixing area 31 is not connected with the first housing 100, and the sliding-rolling area 32 of the flexible display panel 300 is wound around the rolling shaft 13 and accommodated in the whole machine.

As shown in fig. 2, 4 and 6, when the first casing 100 and the second casing 200 slide away from each other, the sliding-rolling area 32 of the flexible display panel 300 can slide around the rolling shaft 13, so as to slide out the hidden screen inside the whole machine, and the flexible display panel 300 is unfolded, so that the display area is increased. After sliding, the upper surfaces of the first casing 100 and the second casing 200 are still flush, which can provide effective support for the flexible display panel 300.

Still alternatively, referring to fig. 4, the groove structures 21 have protruding structures 23 therebetween and around the groove structures, tops of the protruding structures 23 are in the same plane, and the fixing region 31 is attached to the tops of the protruding structures 23.

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

The above embodiment is only an optional embodiment for realizing the sliding and rolling of the screen, and in practical applications, other embodiments are also possible, for example, the flexible display panel 300 may be unfolded and rolled up by tensioning of a tensioning device, which is not specifically limited in this disclosure.

In addition, 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 reference may be made to the related art specifically, which is not specifically limited by the embodiments of the present disclosure.

While, for purposes of simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present disclosure is not limited by the order of acts, as some steps may, in accordance with the present disclosure, occur in other orders and concurrently. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required for the disclosure.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

Finally, it should also be noted that, herein, relational terms such as first 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. Also, 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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing detailed description of the flexible display device provided in the present disclosure has provided specific examples to illustrate the principles and embodiments of the present disclosure, and the descriptions of the above examples are only used to help understand the method and the core ideas of the present disclosure; meanwhile, for a person skilled in the art, based on the idea of the present disclosure, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present disclosure should not be construed as a limitation to the present disclosure.

Claims

1. A flexible display device, comprising:

2. The flexible display device according to claim 1, wherein a clamping groove is disposed on a side of the supporting member close to the flexible display panel, a limiting structure is disposed 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 second direction comprises a third direction from the receiving case to the support member, and wherein the magnetic attraction between the first auxiliary member and the second auxiliary member is gradually reduced along the third direction.

4. The flexible display device according to claim 3, wherein the material of the first auxiliary member is a magnetic material, and the magnetic force of the first auxiliary member is gradually reduced along the third direction.

5. The flexible display device according to claim 4, wherein the first auxiliary member comprises at least two discrete auxiliary members, the auxiliary members being divided into at least two column units in the third direction, the column units comprising at least one column of the auxiliary members, the first parameter of the first auxiliary member gradually decreasing in the third direction;

6. The flexible display device according to claim 4, wherein the first auxiliary member is a unitary structure, and the second parameter of the first auxiliary member gradually decreases along the third direction;

7. The flexible display device according to claim 3, wherein the material of the second auxiliary member is a magnetic material, the auxiliary sub member is divided into at least two column units along the third direction, the column units comprise at least one column of the auxiliary sub member, the column units comprise at least one column, and the third parameter of the first auxiliary member is gradually decreased along the third direction;

8. The flexible display device according to any one of claims 1 to 7, wherein the reel comprises a plurality of reels, the direction of the rotation axis of the reels is the first direction, and at least a part of the reels and the first auxiliary member are made of the same material.

9. The flexible display device according to claim 1, wherein at least a portion of the groove structure is provided with a sliding rail structure, the supporting member is slidably connected to the sliding rail structure, and the sliding rail structure is made of a low friction material.

10. The flexible display device of claim 9, wherein the sliding track structure is made of a material having a coefficient of friction greater than or equal to 0.01 and less than or equal to 0.2.

11. The flexible display device of claim 9, wherein the material of the sliding track structure comprises at least one of polyoxymethylene and teflon.

12. The flexible display device according to claim 9, wherein 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, the two slide rails are respectively embedded in the two slide rail grooves to limit movement of the slide rail structure in a fourth direction, and the fourth direction is perpendicular to the first direction and the second direction;

13. The flexible display device according to claim 12, wherein the slide rail structure further comprises a plurality of connecting portions arranged in parallel along the second direction, and the slide rails are connected to each other by the plurality of connecting portions.

14. The flexible display device according to claim 1, further comprising a pulley and a traction belt, wherein a cavity is formed in the first housing and the second housing in sliding connection, the pulley and the traction belt are disposed in the cavity, the pulley is disposed parallel to the winding shaft, the traction belt is wound around the pulley, one end of the traction belt is connected to an end of the sliding winding region away from the fixing region, and the other end of the traction belt is connected to the second housing;

15. The flexible display device according to claim 1, wherein the groove structures have protruding structures between and around the groove structures, tops of the protruding structures are in the same plane, and the fixing region is attached to the tops of the protruding structures.