CN113793553A

CN113793553A - Display module

Info

Publication number: CN113793553A
Application number: CN202111051640.1A
Authority: CN
Inventors: 王鹏
Original assignee: Hefei Visionox Technology Co Ltd
Current assignee: Hefei Visionox Technology Co Ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2021-12-14

Abstract

The embodiment of the invention discloses a display module, which comprises an inward folding area, a first non-bending area and a second non-bending area, wherein the first non-bending area and the second non-bending area are positioned on two opposite sides of the inward folding area and are connected with the inward folding area; the display module assembly includes: the display module comprises a flexible display screen, a magnetic supporting layer and a first magnetic structure layer which are stacked along the thickness direction of the display module; along the thickness direction of the display module, the flexible display screen, the magnetic support layer and the first magnetic structure layer are overlapped in the inward folding area; when the inward folding area is in a folding state, the light emitting surface of the flexible display screen located in the first non-folding area and the light emitting surface of the flexible display screen located in the second non-folding area face each other, and the magnetic support layer and the first magnetic structure layer in the inward folding area face opposite magnetic poles. The technical scheme provided by the embodiment of the invention can prevent the W-shaped reverse arch phenomenon from occurring during inward folding.

Description

Display module

Technical Field

The invention relates to the technical field of display, in particular to a display module.

Background

With the wide use of flexible display screens, foldable display panels have been applied to some display devices (such as foldable mobile phones), and by using the foldable display panels, the display area of the display panels can be further increased, and the foldable display panels are convenient to fold, store and display in a split screen manner. The foldable display panel is generally divided into a bending region and a non-bending region, and the bending region is bent to realize the folding of the display device.

Disclosure of Invention

The embodiment of the invention provides a display module to prevent a W-shaped reverse arch phenomenon from occurring during inward folding.

The embodiment of the invention provides a display module, which comprises: the folding device comprises an inward folding area, a first non-bending area and a second non-bending area, wherein the first non-bending area and the second non-bending area are positioned on two opposite sides of the inward folding area and are connected with the inward folding area;

the display module assembly includes: the display module comprises a flexible display screen, a magnetic supporting layer and a first magnetic structure layer which are stacked along the thickness direction of the display module; along the thickness direction of the display module, the flexible display screen, the magnetic support layer and the first magnetic structure layer are overlapped in the inward folding area;

when the inward folding area is in a bending state, the light emitting surface of the flexible display screen in the first non-bending area and the light emitting surface of the flexible display screen in the second non-bending area face each other, the magnetic support layer and the first magnetic structure layer in the inward folding area face opposite magnetic poles, attraction force is generated between the magnetic support layer and the first magnetic structure layer in the inward folding area, the bending degree of the film layers with higher modulus such as the magnetic support layer is increased, and the W-shaped reverse arch phenomenon of the flexible display screen with lower modulus during inward folding is avoided.

Further, when the folded-in region is in a flattened state, the polarities of the magnetic poles facing to each other of the magnetic support layer and the first magnetic structure layer in the folded-in region are the same.

Further, from one side of the inward folding area close to the first non-folding area, along the direction far away from the first non-folding area to the middle area of the inward folding area, the magnetic force between the magnetic support layer and the first magnetic structure layer is gradually increased; from the one side that the inflection district is close to the second non-bending zone, along the direction of keeping away from the second non-bending zone, to the middle zone in inflection district, magnetic force between magnetic support layer and the first magnetic structure layer crescent is favorable to better forms such as keeping water droplet when the state of buckling in the inflection district.

Furthermore, the magnetic support layer and the first magnetic structure layer are positioned on one side of the flexible display screen, which is far away from the display side; the magnetic supporting layer is positioned between the flexible display screen and the first magnetic structure layer, so that the stress uniformity can be improved, and the influence of the hardness in the first magnetic structure layer and the influence of the electromagnetic coil with larger volume on the bending performance can be reduced.

Further, the display module assembly still includes: the first rotating shaft structure and the second rotating shaft structure are positioned on one side, far away from the flexible display screen, of the magnetic supporting layer; the first rotating shaft structure and the second rotating shaft structure are positioned in the inward folding area; the first magnetic structure layer is positioned between the first rotating shaft structure and the second rotating shaft structure; the arrangement direction of the first rotating shaft structure and the second rotating shaft structure is perpendicular to the arrangement direction of the first non-bending area and the second non-bending area when the inward bending area is in a flat state.

Further, the display module assembly still includes: the folding device comprises an outer folding area, a third non-folding area and a fourth non-folding area, wherein the third non-folding area and the fourth non-folding area are positioned on two opposite sides of the outer folding area and are connected with the outer folding area;

the display module assembly still includes: a second magnetic structure layer; the flexible display screen, the magnetic supporting layer and the second magnetic structure layer are arranged in a stacking mode along the thickness direction of the display module; along the thickness direction of the display module, the flexible display screen, the magnetic support layer and the second magnetic structure layer are overlapped in the folding-out area;

when the folding region is in a folding state, the light emitting surface of the flexible display screen positioned in the third non-folding region and the light emitting surface of the flexible display screen positioned in the fourth non-folding region are arranged to be deviated from each other; the magnetic support layer in the flattening out-folding area and the second magnetic structure layer have the same polarity towards the opposite magnetic pole, so that the U-shaped and other forms of the out-folding area are kept in a bent state. And/or when the folding region is in a flat state, the magnetic support layer and the second magnetic structure layer in the folding region face opposite magnetic poles in opposite directions, so that the flatness of the folding region in the flat state is improved.

Furthermore, the magnetic force between the magnetic support layer and the second magnetic structure layer is gradually increased from one side of the folded region, which is close to the third non-bent region, to the middle region of the folded region along the direction away from the third non-bent region; from one side of the folded region close to the fourth non-bent region to the middle region of the folded region along the direction far away from the fourth non-bent region, the magnetic force between the magnetic support layer and the second magnetic structure layer is gradually increased;

the second magnetic structure layer is positioned on one side of the flexible display screen, which is far away from the display side; the magnetic support layer is positioned between the flexible display screen and the second magnetic structure layer;

the display module assembly still includes: the third rotating shaft structure and the fourth rotating shaft structure are positioned on one side of the magnetic supporting layer, which is far away from the flexible display screen; the third rotating shaft structure and the fourth rotating shaft structure are positioned in the outward folding area; the second magnetic structure layer is positioned between the third rotating shaft structure and the fourth rotating shaft structure; the arrangement direction of the third rotating shaft structure and the fourth rotating shaft structure is perpendicular to the arrangement direction of the third non-bending area and the fourth non-bending area when the outward-bending area is in a flat state.

Furthermore, when the outward folding area is in a flat state and the inward folding area is in a flat state, the polarities of the magnetic poles facing to each other of the magnetic support layer and the first magnetic structure layer in the inward folding area are the same, so that the inward folding area has better flatness in the flat state;

when the outward folding area is in a bending state and the inward folding area is in a flattening state, the polarities of the magnetic poles facing the opposite side of the magnetic support layer and the first magnetic structure layer in the inward folding area are opposite, so that the inward folding area has better flatness in the flattening state, and the situation that the inward folding area is poor in flatness due to the fact that the inward folding area is pulled by the outward folding part is avoided;

the second non-bending area and the third non-bending area are the same non-bending area; the inward folding area and the outward folding area are positioned on two opposite sides of the second non-bending area;

the inward-folding area is in a water drop shape in a bending state; and/or the folded-out region is U-shaped in the folded state.

Furthermore, any rotating shaft structure comprises a plurality of gears, wherein in any rotating shaft structure, the arrangement direction of the plurality of gears is perpendicular to the axial direction of the gears; the axial direction of the gear is vertical to the arrangement direction of the non-bending areas on two sides connected with the gear in the state that the bending area is flattened; and adjacent gears are in meshed connection.

Further, any magnetic structure layer comprises a variable magnetic pole structure layer, and the variable magnetic pole structure layer comprises one or more electromagnetic coils;

and/or, the magnetic support layer comprises one or more of the following materials: ferrite, neodymium iron boron, and samarium cobalt.

In the technical scheme of the embodiment of the invention, the display module comprises an inflected area, a first non-bending area and a second non-bending area, wherein the first non-bending area and the second non-bending area are positioned on two opposite sides of the inflected area and are connected with the inflected area; the display module assembly includes: the display module comprises a flexible display screen, a magnetic supporting layer and a first magnetic structure layer which are stacked along the thickness direction of the display module; along the thickness direction of the display module, the flexible display screen, the magnetic support layer and the first magnetic structure layer are overlapped in the inward folding area; when the inward folding area is in a bending state, the light emitting surface of the flexible display screen in the first non-bending area and the light emitting surface of the flexible display screen in the second non-bending area face each other, the magnetic support layer and the first magnetic structure layer in the inward folding area face opposite magnetic poles, attraction force is generated between the magnetic support layer and the first magnetic structure layer in the inward folding area, the bending degree of the film layers with higher modulus such as the magnetic support layer is increased, and the W-shaped reverse arch phenomenon of the flexible display screen with lower modulus during inward folding is avoided.

Drawings

Fig. 1 is a schematic structural diagram of a display module according to an embodiment of the present invention when an inflected region is in a flattened state;

fig. 2 is a schematic cross-sectional structure view of a display module according to an embodiment of the present invention when an inflected region is in a bent state;

fig. 3 is a schematic cross-sectional structure view of a display module according to an embodiment of the present invention when an inflected region is in a flattened state;

fig. 4 is a schematic cross-sectional structure view of another display module according to an embodiment of the present invention when the inner folding region is in a folded state;

fig. 5 is a schematic top view of a display module according to an embodiment of the present invention;

fig. 6 is a schematic cross-sectional view illustrating a display module according to another embodiment of the present invention when the folded region is in a flattened state;

fig. 7 is a schematic cross-sectional view illustrating a display module according to another embodiment of the present invention when the inner folding region is in a folded state;

fig. 8 is a schematic structural diagram of a control circuit according to an embodiment of the present invention;

FIG. 9 is a schematic top view illustrating a display module according to an embodiment of the present invention;

fig. 10 is a schematic cross-sectional view illustrating a display module according to an embodiment of the present invention, wherein the inner folding area is in a flat state, and the outer folding area is in a flat state;

fig. 11 is a schematic cross-sectional structure view of a display module according to an embodiment of the present invention, where the inward folding region is in a flattened state, and the outward folding region is in a bent state;

fig. 12 is a schematic cross-sectional structure view of a display module according to an embodiment of the present invention, where the inner folding region is in a folding state and the outer folding region is in a folding state;

fig. 13 is a schematic cross-sectional view illustrating a display module according to an embodiment of the present invention, wherein the inner folding region is in a flat state, and the outer folding region is in a flat state;

fig. 14 is a schematic cross-sectional view illustrating a display module according to an embodiment of the present invention, wherein the inner folding region is in a flat state, and the outer folding region is in a bent state;

fig. 15 is a schematic cross-sectional view illustrating a display module according to an embodiment of the invention, wherein the inner folding region is in a folded state, and the outer folding region is in a folded state;

FIG. 16 is a schematic view showing a W-shaped reverse arching phenomenon occurring when the magnetic support layer and the variable magnetic pole structure layer are not disposed at the time of inward folding;

fig. 17 is a schematic view showing that when the magnetic support layer and the variable magnetic pole structure layer are not provided, the folded part is pulled, and the folded part has poor flatness.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

The embodiment of the invention provides a display module. Fig. 1 is a schematic structural diagram of a display module according to an embodiment of the present invention when an inflected region is in a flattened state. Fig. 2 is a schematic cross-sectional structure diagram of a display module in a bending state in an inflected region according to an embodiment of the present invention. This display module assembly includes: a folded-in region 101, and a first non-folded region 102 and a second non-folded region 103 located at opposite sides of the folded-in region 101 and connected to the folded-in region 101.

The display module assembly includes: the display module comprises a flexible display screen 10, a magnetic support layer 20 and a first magnetic structure layer 30 which are stacked in the thickness direction of the display module; along the thickness direction of the display module, the flexible display screen 10, the magnetic support layer 20 and the first magnetic structure layer 30 are overlapped in the folded region 101.

When the folded region 101 is in a bent state, the light exit surface of the flexible display screen 10 located in the first non-bent region 102 and the light exit surface of the flexible display screen 10 located in the second non-bent region 103 face each other, and the polarities of the magnetic poles facing each other of the magnetic support layer 20 and the first magnetic structure layer 30 in the folded region 101 are opposite.

The flexible display screen 10 may include an organic light emitting diode display screen, etc., among others. The magnetic support layer 20 may support and protect the flexible display screen 10. The flexible display screen 10, the magnetic support layer 20 and the first magnetic structure layer 30 may be bonded together by an adhesive. Optionally, the magnetic support layer 20 comprises one or more of the following materials: ferrite, neodymium iron boron, and samarium cobalt. Alternatively, the first magnetic structure layer 30 may comprise a variable magnetic pole structure layer comprising one or more electromagnetic coils. For example, when the folded region 101 is in the folded state, the magnetic pole facing the first magnetic structure layer 30 in the folded region 101 is N-pole, and the magnetic pole facing the magnetic structure layer 20 in the folded region 101 is S-pole, or vice versa.

The display module can comprise one or at least two bending areas and at least two non-bending areas, and the bending areas and the non-bending areas are alternately arranged in a line when the display module is in a flat state. Either fold region may be an in-fold region or an out-fold region. When the display module is in a flattening state, the thickness direction of the display module can be parallel to the direction Z. The direction X may be perpendicular to the direction Y. The direction X may be perpendicular to the direction Z. The direction Y may be perpendicular to the direction Z. Fig. 1 exemplarily shows a case where the display module includes one bending region (i.e., the folded-in region 101) and two non-bending regions (i.e., the first non-bending region 102 and the second non-bending region 103). Optionally, the folded-in region 101 is drop-shaped in the folded state.

As shown in fig. 2, when the folded region 101 is in a bent state, the display side of the flexible display screen 10 in the folded region 101 needs to be recessed, and the polarities of the magnetic support layer 20 and the first magnetic structure layer 30 in the folded region 101 facing the opposite magnetic poles are opposite, so that an attractive force is generated between the magnetic support layer 20 and the first magnetic structure layer 30 in the folded region 101 to increase the bending degree of the film layers with higher modulus, such as the magnetic support layer 20, and to avoid the W-shaped reverse arching phenomenon of the flexible display screen with lower modulus during folding, as shown in fig. 16, fig. 16 is a schematic diagram of the W-shaped reverse arching phenomenon during folding when the flexible display screen is not provided with the magnetic support layer and the magnetic structure layer. The modulus of the flexible display 10 may be lower than the modulus of the magnetic support layer 20, so that the flexible display 10 is easily deformed relative to the magnetic support layer 20.

In the technical scheme of the embodiment, the display module comprises an inflected area, a first non-bending area and a second non-bending area, wherein the first non-bending area and the second non-bending area are positioned on two opposite sides of the inflected area and are connected with the inflected area; the display module assembly includes: the display module comprises a flexible display screen, a magnetic supporting layer and a first magnetic structure layer which are stacked along the thickness direction of the display module; along the thickness direction of the display module, the flexible display screen, the magnetic support layer and the first magnetic structure layer are overlapped in the inward folding area; when the inward folding area is in a bending state, the light emitting surface of the flexible display screen in the first non-bending area and the light emitting surface of the flexible display screen in the second non-bending area face each other, the magnetic support layer and the first magnetic structure layer in the inward folding area face opposite magnetic poles, attraction force is generated between the magnetic support layer and the first magnetic structure layer in the inward folding area, the bending degree of the film layers with higher modulus such as the magnetic support layer is increased, and the W-shaped reverse arch phenomenon of the flexible display screen with lower modulus during inward folding is avoided.

Optionally, on the basis of the above embodiment, the display module includes only one bending region, i.e. the folded-in region 101. Optionally, when the folded-in region 101 is in the flat state, the polarities of the magnetic poles facing each other of the magnetic support layer 20 and the first magnetic structure layer 30 in the folded-in region 101 are the same (for example, both are N poles or both are S poles), so that a repulsive force is generated between the magnetic support layer 20 and the first magnetic structure layer 30 in the folded-in region 101, thereby improving the flatness of the flat display module after being folded in, reducing the sag of the flat flexible display screen after being folded in, and reducing the concave-convex wrinkles of the folded-in region.

The first magnetic structure layer 30 may include a variable magnetic pole structure layer, and the variable magnetic pole structure layer may include one or more electromagnetic coils. The polarity of the side of the magnetic coil facing the magnetic support layer 20 can be controlled by controlling the direction of the current in the magnetic coil. The magnitude of the magnetic force can be controlled by controlling the magnitude of the current in the electromagnetic coil.

Optionally, on the basis of the foregoing embodiment, fig. 3 is a schematic cross-sectional structure diagram of a display module according to an embodiment of the present invention when the folded region is in a flattened state, and fig. 4 is a schematic cross-sectional structure diagram of a display module according to an embodiment of the present invention when the folded region is in a bent state, where when the folded region 101 is in a bent state or a flattened state, a magnetic force between the magnetic support layer 20 and the first magnetic structure layer 30 gradually increases from a side of the folded region 101 close to the first non-bent region 102 along a direction away from the first non-bent region 102, such as a direction X1 in fig. 3, to a middle region of the folded region 101.

Wherein different bending portions of the folded-in region 101 may be subjected to different forces. When the folded-in region 101 is in a bent state, since the degree of recess of the middle region of the folded-in region 101 is greater than the degree of recess of the edge region of the folded-in region 101, the attractive force between the magnetic support layer 20 and the first magnetic structure layer 30 in the middle region of the folded-in region 101 is greater than the attractive force between the magnetic support layer 20 and the first magnetic structure layer 30 in the edge region of the folded-in region 101 close to the first non-bent region 102, so that the folded-in region can better maintain the water droplet shape. The first magnetic structure layer 30 may include a variable magnetic pole structure layer, and the variable magnetic pole structure layer may include a plurality of electromagnetic coils 1 arranged in an array.

Alternatively, on the basis of the above-mentioned embodiments, as shown in fig. 3 and fig. 4, when the folded-in region 101 is in the folded state or the unfolded state, the magnetic force between the magnetic support layer 20 and the first magnetic structure layer 30 gradually increases from the side of the folded-in region 101 close to the second non-folded region 103 to the middle region of the folded-in region 101 along the direction away from the second non-folded region 103, such as the direction X2 in fig. 3.

When the folded-in region 101 is in a bent state, since the degree of recess of the middle region of the folded-in region 101 is greater than the degree of recess of the edge region of the folded-in region 101, the attractive force between the magnetic support layer 20 and the first magnetic structure layer 30 in the middle region of the folded-in region 101 is set to be greater than the attractive force between the magnetic support layer 20 and the first magnetic structure layer 30 in the edge region of the folded-in region 101 close to the second non-bent region 103, so that the folded-in region maintains a water-drop shape.

Alternatively, on the basis of the above embodiments, as shown in fig. 3 and fig. 4, the magnetic support layer 20 and the first magnetic structure layer 30 are located on the side of the flexible display screen 10 facing away from the display side; the magnetic support layer 20 is located between the flexible display screen 10 and the first magnetic structure layer 30.

The first magnetic structure layer 30 may include a variable magnetic pole structure layer, and the variable magnetic pole structure layer may include a plurality of electromagnetic coils disposed at intervals. The larger the number of the electromagnetic coils 1 in the first magnetic structure layer 30, the more favorable the volume reduction of a single electromagnetic coil 1, and the influence of the electromagnetic coil 1 with larger hardness and volume on the bending performance can be reduced. The magnetic support layer 20 may be provided over the entire surface. The magnetic support layer 20 is located between the flexible display screen 10 and the first magnetic structure layer 30, so that the contact area between the magnetic support layer 20 and the flexible display screen 10 is large, the magnetic support layer 20 can uniformly disperse the magnetic force generated between the magnetic support layer 20 and the first magnetic structure layer 30 on the flexible display screen 10, and the problem that the electromagnetic coil 1 is arranged between the flexible display screen 10 and the magnetic support layer 20, so that the bending is not facilitated, and the stress concentration and easy damage of the flexible display screen exist is avoided.

Optionally, on the basis of the foregoing embodiment, fig. 5 is a schematic top view structure diagram of a display module according to an embodiment of the present invention, fig. 6 is a schematic cross-sectional structure diagram of another display module according to an embodiment of the present invention when the folded region is in a flattened state, fig. 7 is a schematic cross-sectional structure diagram of another display module according to an embodiment of the present invention when the folded region is in a bent state, and the display module further includes: a first hinge structure 40 and a second hinge structure 50 located on a side of the magnetic support layer 20 facing away from the flexible display screen 10. The first and

second hinge structures

40 and 50 are located in the folded-in region 101. The first magnetic structure layer 30 is located between the first rotating shaft structure 40 and the second rotating shaft structure 50. The arrangement direction (parallel to the direction Y) of the first rotating shaft structure 40 and the second rotating shaft structure 50 is perpendicular to the arrangement direction of the first non-bending region 102 and the second non-bending region 103 when the folded-in region 101 is in the flat state.

Fig. 3 is a schematic cross-sectional view taken along a direction A1a2 in fig. 5. Fig. 6 may be a schematic cross-sectional view taken along the direction B1B2 in fig. 5. The first rotating shaft structure 40 and the second rotating shaft structure 50 rotate along with the state change of the fold-in area 101. Through setting up first pivot structure 40 and second pivot structure 50 in the both sides edge of infolding district 101, can avoid when actual cell-phone buckles, can not control user's position of buckling, the both sides pivot can produce the atress inequality, leads to the great condition emergence of wearing and tearing to the pivot.

Alternatively, on the basis of the above-mentioned embodiment, as shown in fig. 6 and 7, any rotating shaft structure includes a plurality of gears 2, wherein in any rotating shaft structure, the arrangement direction of the plurality of gears 2 is perpendicular to the axial direction of the gears 2 (parallel to the direction Y); the axial direction of the gear 2 is vertical to the arrangement direction of the non-bending areas at two sides connected with the gear in the state that the bending area is flattened; the adjacent gears 2 are in meshed connection. Wherein the gear 2 rotates with the state change of the bending area.

Optionally, on the basis of the foregoing embodiment, fig. 8 is a schematic structural diagram of a control circuit according to an embodiment of the present invention, and the display module further includes: a control circuit. The control circuit may include a first power source 3, a second power source 4, a first switch 5, and a second switch 6 provided in correspondence with the electromagnetic coil 1. Wherein, the first power supply 3 is connected in series with the first switch 5 to form a first series branch; the second power supply 4 and the second switch 6 are connected in series to form a second series branch; the two ends of the first series branch circuit and the second series circuit after being connected in parallel are respectively and electrically connected with the two ends of the corresponding electromagnetic coils. The first power supply 3 is controlled to input forward current to the electromagnetic coil 1 or not by controlling the on or off of the first switch 5. The first power supply 3 is controlled to input a forward current to the electromagnetic coil 1 by controlling the conduction of the first switch 5. The second power supply 4 is controlled to input negative current to the electromagnetic coil 1 by controlling the conduction of the second switch 6. The first switch 5 and the second switch 6 are not turned on simultaneously.

Optionally, on the basis of the foregoing embodiment, as shown in fig. 6 and 7, the display module further includes: a middle frame 90. The middle frame 90 is located on the side of the magnetic support layer 20 away from the flexible display screen 10. The middle frame 90 may cover at least all of the non-bending regions. Along the thickness direction Z of the display module, the middle frame 90 is not overlapped with the magnetic structure layer and the rotation shaft structure. The middle frame 90 may have a function of supporting and protecting the flexible display screen 10. The middle frame 90 may be adhesively attached to the magnetic support layer 20 by an adhesive.

Optionally, fig. 9 is a schematic top view structure diagram of another display module according to an embodiment of the present invention, fig. 10 is a schematic cross-sectional structure diagram of a display module according to an embodiment of the present invention when an inward folding region is in a flat state and an outward folding region is in a flat state, fig. 11 is a schematic cross-sectional structure diagram of a display module according to an embodiment of the present invention when an inward folding region is in a flat state and an outward folding region is in a bent state, fig. 12 is a schematic cross-sectional structure diagram of a display module according to an embodiment of the present invention when an inward folding region is in a bent state and an outward folding region is in a bent state, and the display module further includes: an outer fold region 104, and a third non-fold region 105 and a fourth non-fold region 106 located on opposite sides of the outer fold region 104 and connected to the outer fold region 104.

The display module assembly still includes: a second magnetic structure layer 60; the flexible display screen 10, the magnetic support layer 20 and the second magnetic structure layer 60 are stacked in the thickness direction Z of the display module; along the thickness direction Z of the display module, the flexible display screen 10, the magnetic support layer 20 and the second magnetic structure layer 60 overlap in the folding region 104.

When the folded-out region 104 is in the flattened state, the polarities of the magnetic support layers 20 and the second magnetic structure layers 60 in the folded-out region 104 facing the opposite magnetic poles are opposite.

The folded region 101 is in a flattened state or a bent state, and when the folded region 104 is in a flattened state, the polarities of the magnetic supporting layer 20 and the second magnetic structure layer 60 in the folded region 104 facing the opposite magnetic poles are opposite, so that attraction is generated between the magnetic supporting layer 20 and the second magnetic structure layer 60 in the folded region 104, the flatness of the folded display module is improved, and the protruding degree of the folded flexible display screen 10 is reduced.

When the folded region 104 is in the folded state, the polarities of the magnetic poles facing each other of the magnetic support layer 20 and the second magnetic structure layer 60 in the folded region 104 are the same.

The display side of the flexible display screen 10 in the folded region 104 needs to be raised when the folded region 104 is in the folded state, and the polarities of the magnetic support layers 20 and the second magnetic structure layers 60 in the folded region 104 facing the opposite magnetic poles are the same, so that a repulsive force is generated between the magnetic support layers 20 and the second magnetic structure layers 60 in the folded region 104, and the bending degree of the film layers with higher modulus, such as the magnetic support layers 20, is increased, so that the folded region maintains a U-shape and other forms when in the folded state.

The second magnetic structure layer 60 has the same or similar structure as the first magnetic structure layer 30. The second magnetic structure layer 60 may include a variable magnetic pole structure layer, which may include one or more electromagnetic coils 1. The second magnetic structure layer 60 may include a variable magnetic pole structure layer, which may include a plurality of electromagnetic coils 1 arranged in an array. Fig. 10 can be a schematic cross-sectional view taken along a direction A1a2 in fig. 9.

Alternatively, on the basis of the above embodiment, as shown in fig. 10, 11 and 12, when the folded-out region 104 is in the folded state or the unfolded state, the magnetic force between the magnetic support layer 20 and the second magnetic structure layer 60 gradually increases from the side of the folded-out region 104 close to the third non-folded region 105 to the middle region of the folded-out region 104 along the direction away from the third non-folded region 105.

When the folded region 104 is in the folded state, since the protrusion degree of the middle region of the folded region 104 is greater than the protrusion degree of the edge region of the folded region 104, the repulsive force between the magnetic support layer 20 and the second magnetic structure layer 60 in the middle region of the folded region 104 is set to be greater than the repulsive force between the magnetic support layer 20 and the second magnetic structure layer 60 in the edge region of the folded region 104 close to the third non-folded region 105, so that the folded region maintains a U-shape or the like in the folded state.

When the folded-out region 104 is changed from the folded state to the unfolded state, due to the influence of the folded state, the protrusion degree of the middle region of the folded-out region 104 is greater than the protrusion degree of the edge region of the folded-out region 104, so that the attractive force between the magnetic support layer 20 and the second magnetic structure layer 60 in the middle region of the folded-out region 104 is set to be greater than the attractive force between the magnetic support layer 20 and the second magnetic structure layer 60 in the edge region of the folded-out region 104 close to the third non-folded region 105, so as to better restore the flatness.

Alternatively, on the basis of the above embodiment, as shown in fig. 10, 11 and 12, when the folded-out region 104 is in the folded state or the unfolded state, the magnetic force between the magnetic support layer 20 and the second magnetic structure layer 60 gradually increases from the side of the folded-out region 104 close to the fourth non-folded region 106 to the middle region of the folded-out region 104 along the direction away from the fourth non-folded region 106.

When the folded region 104 is in the folded state, since the protrusion degree of the middle region of the folded region 104 is greater than the protrusion degree of the edge region of the folded region 104, the repulsive force between the magnetic support layer 20 and the second magnetic structure layer 60 in the middle region of the folded region 104 is set to be greater than the repulsive force between the magnetic support layer 20 and the second magnetic structure layer 60 in the edge region of the folded region 104 close to the fourth non-folded region 106, so that the folded region maintains a U-shape or the like in the folded state.

When the folded-out region 104 is changed from the folded state to the unfolded state, due to the influence of the folded state, the protrusion degree of the middle region of the folded-out region 104 is greater than the protrusion degree of the edge region of the folded-out region 104, so that the attractive force between the magnetic support layer 20 and the second magnetic structure layer 60 in the middle region of the folded-out region 104 is set to be greater than the attractive force between the magnetic support layer 20 and the second magnetic structure layer 60 in the edge region of the folded-out region 104 close to the fourth non-folded region 106, so as to better restore the flatness.

Alternatively, on the basis of the above embodiment, as shown in fig. 10, fig. 11 and fig. 12, the second magnetic structure layer 60 is located on the side of the flexible display screen 20 away from the display side; the magnetic support layer 20 is located between the flexible display screen 10 and the second magnetic structure layer 60.

The second magnetic structure layer 60 may include a variable magnetic pole structure layer, and the variable magnetic pole structure layer may include a plurality of electromagnetic coils arranged at intervals. The larger the number of the electromagnetic coils 1 in the second magnetic structure layer 60 is, the more favorable the volume of a single electromagnetic coil 1 is, the more favorable the influence of the electromagnetic coil 1 with high hardness on the bending performance can be reduced. The magnetic support layer 20 may be provided over the entire surface. The magnetic support layer 20 is located between the flexible display screen 10 and the second magnetic structure layer 60, so that the contact area between the magnetic support layer 20 and the flexible display screen 10 is large, the magnetic support layer 20 can uniformly disperse the magnetic force generated between the magnetic support layer 20 and the second magnetic structure layer 60 on the flexible display screen 10, and the problem that the electromagnetic coil 1 is arranged between the flexible display screen 10 and the magnetic support layer 20, so that bending is not facilitated, stress concentration of the flexible display screen exists, and damage is caused is avoided.

Optionally, on the basis of the foregoing embodiment, fig. 13 is a schematic cross-sectional structure diagram of a display module provided in an embodiment of the present invention when the inward folding region is in a flat state and the outward folding region is in a flat state, fig. 14 is a schematic cross-sectional structure diagram of a display module provided in an embodiment of the present invention when the inward folding region is in a flat state and the outward folding region is in a bent state, fig. 15 is a schematic cross-sectional structure diagram of a display module provided in an embodiment of the present invention when the inward folding region is in a bent state and the outward folding region is in a bent state, and the display module further includes: a third hinge structure 70 and a fourth hinge structure 80 located on a side of the magnetic support layer 20 remote from the flexible display screen 10.

Wherein, the third rotating shaft structure 70 and the fourth rotating shaft structure 80 are located in the folding region 104; the second magnetic structure layer 60 is located between the third spindle structure 70 and the fourth spindle structure 80; the arrangement direction of the third rotating shaft structure 70 and the fourth rotating shaft structure 80 is perpendicular to the arrangement direction of the third non-bending region 105 and the fourth non-bending region 106 when the folded-out region 104 is in the flat state.

Fig. 13 is a schematic cross-sectional view taken along the direction B1B2 in fig. 9. The first, second, third and fourth

rotational shaft structures

40, 50, 70 and 80 are identical or similar in structure. The third hinge structure 70 and the fourth hinge structure 80 rotate with the state of the fold-out region 104.

Optionally, on the basis of the above embodiment, as shown in fig. 10, when the folding-out region 104 is in the flat state and the folding-in region 101 is in the flat state, the polarities of the magnetic poles facing each other of the magnetic support layer 20 and the first magnetic structure layer 30 in the folding-in region 101 are the same, so that a repulsive force is generated between the magnetic support layer 20 and the first magnetic structure layer 30 in the folding-in region 101, so as to improve the flatness of the flat display module after folding-in and reduce the degree of depression of the flat flexible display screen 10 after folding-in.

After the outward folding region 104 is in the flat state, and the inward folding region 101 is changed from the folded state to the flat state, due to the influence of the folded state, the protrusion degree of the middle region of the outward folding region 104 is greater than the protrusion degree of the edge region of the outward folding region 104, so that the attractive force between the magnetic support layer 20 and the second magnetic structure layer 60 in the middle region of the outward folding region 104 is set to be greater than the attractive force between the magnetic support layer 20 and the second magnetic structure layer 60 in the edge region of the outward folding region 104 close to the fourth non-folded region 106, so as to better restore the flat state.

Optionally, on the basis of the foregoing embodiment, as shown in fig. 11, when the outward folding region 104 is in a folded state, and the inward folding region 101 is in a flattened state, polarities of the magnetic poles facing each other of the magnetic support layer 20 and the first magnetic structure layer 30 in the inward folding region 101 are opposite, so that an attractive force is generated between the magnetic support layer 20 and the first magnetic structure layer 30 in the inward folding region 101, so as to relieve a pulling force of the outward folding portion received by the inward folding region during outward folding, and avoid a situation that the inward folding region is poor in flatness due to pulling of the outward folding portion, as shown in fig. 17, fig. 17 is a schematic diagram of poor flatness due to pulling of the outward folding portion and inward folding region when the magnetic support layer and the magnetic structure layer are not provided, and since the support layer and the middle frame have high moduli, the flexible display screen has a low modulus, and the flexible display screen is more easily deformed.

Alternatively, as shown in fig. 12, the folded-in region 101 is drop-shaped when in the bent state, so that the bending stress applied to the folded-in region 101 is uniform. If the inward-folding area 101 is in a U shape when being bent, the U-shaped inward-folding area is not easy to have the problem of reverse arch because of no redundant length after being subjected to pulling force. If the inward-folding region 101 is in a drop shape when being bent, the drop-shaped inward-folding region is provided with the magnetic support layer and the magnetic structure layer, so that the phenomenon that the drop-shaped inward-folding region is subjected to pulling force and W-shaped inverted arch occurs due to the existence of redundant length can be avoided, as shown in FIG. 16.

Alternatively, on the basis of the above embodiment, as shown in fig. 12, when the folded-out region 104 is in the folded state or the unfolded state, and the folded-in region 101 is in the folded state, the polarities of the magnetic support layers 20 and the first magnetic structure layers 30 in the folded-in region 101 facing the opposite magnetic poles are opposite.

Alternatively, as shown in fig. 11, the folded-out region 104 is U-shaped or drop-shaped in the folded state.

Optionally, on the basis of the above embodiment, as shown in fig. 9, the second non-bending region 102 and the third non-bending region 105 are the same non-bending region; the folded-in region 101 and the folded-out region 104 are located on opposite sides of the second non-folded region 102.

Alternatively, on the basis of the above embodiment, as shown in fig. 13, any rotating shaft structure includes a plurality of gears 2, wherein in any rotating shaft structure, the arrangement direction of the plurality of gears 2 is perpendicular to the axial direction of the gears 2; the axial direction of the gear 2 is vertical to the arrangement direction of the non-bending areas at two sides connected with the gear in the state that the bending area is flattened; the adjacent gears 2 are in meshed connection.

Alternatively, on the basis of the above embodiment, as shown in fig. 10, any magnetic structure layer may include a variable magnetic pole structure layer, and the variable magnetic pole structure layer may include one or more electromagnetic coils 1.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. The utility model provides a display module assembly, its characterized in that, display module assembly includes: the folding device comprises an inward folding area, a first non-bending area and a second non-bending area, wherein the first non-bending area and the second non-bending area are positioned on two opposite sides of the inward folding area and are connected with the inward folding area;

the display module assembly includes: the flexible display screen, the magnetic support layer and the first magnetic structure layer are stacked along the thickness direction of the display module; along the thickness direction of the display module, the flexible display screen, the magnetic support layer and the first magnetic structure layer are overlapped in the inward folding area;

when the inward folding area is in a folding state, the light emitting surface of the flexible display screen located in the first non-folding area and the light emitting surface of the flexible display screen located in the second non-folding area are arranged towards each other, and the magnetic support layer and the first magnetic structure layer in the inward folding area are opposite in polarity towards the magnetic poles of each other.

2. The display module assembly of claim 1, wherein when the folded-in region is in the unfolded state, the magnetic support layer and the first magnetic structure layer in the folded-in region have the same polarity of the magnetic poles facing each other.

3. The display module assembly according to claim 1, wherein the magnetic force between the magnetic support layer and the first magnetic structure layer gradually increases from the side of the folded region close to the first non-folded region to the middle region of the folded region along the direction away from the first non-folded region; from one side of the inward folding area close to the second non-folding area to the middle area of the inward folding area along the direction far away from the second non-folding area, the magnetic force between the magnetic support layer and the first magnetic structure layer is gradually increased.

4. The display module assembly of claim 1, wherein the magnetic support layer and the first magnetic structure layer are located on a side of the flexible display screen facing away from the display side; the magnetic support layer is positioned between the flexible display screen and the first magnetic structure layer.

5. The display module assembly of claim 4, wherein the display module assembly further comprises: the first rotating shaft structure and the second rotating shaft structure are positioned on one side of the magnetic supporting layer, which is far away from the flexible display screen; the first rotating shaft structure and the second rotating shaft structure are positioned in the inward folding area; the first magnetic structure layer is positioned between the first rotating shaft structure and the second rotating shaft structure; the arrangement direction of the first rotating shaft structure and the second rotating shaft structure is perpendicular to the arrangement direction of the first non-bending area and the second non-bending area when the inward bending area is in a flat state.

6. The display module assembly of claim 1, wherein the display module assembly further comprises: the folding device comprises an outer folding area, a third non-folding area and a fourth non-folding area, wherein the third non-folding area and the fourth non-folding area are positioned on two opposite sides of the outer folding area and are connected with the outer folding area;

the display module assembly still includes: a second magnetic structure layer; the flexible display screen, the magnetic support layer and the second magnetic structure layer are arranged in a stacked mode along the thickness direction of the display module; along the thickness direction of the display module, the flexible display screen, the magnetic support layer and the second magnetic structure layer are overlapped in the folding region;

when the folding region is in a bending state, the light emitting surface of the flexible display screen located in the third non-bending region and the light emitting surface of the flexible display screen located in the fourth non-bending region are arranged to be deviated from each other; the magnetic support layer in the folded region and the second magnetic structure layer have the same polarity towards the opposite magnetic poles; and/or when the folding-out area is in a flattening state, the magnetic support layer and the second magnetic structure layer in the folding-out area face opposite poles in opposite directions.

7. The display module according to claim 6, wherein the magnetic force between the magnetic support layer and the second magnetic structure layer gradually increases from the side of the folded region close to the third non-folded region to the middle region of the folded region along the direction away from the third non-folded region; from one side of the folded region close to the fourth non-bent region to the middle region of the folded region along the direction far away from the fourth non-bent region, the magnetic force between the magnetic support layer and the second magnetic structure layer is gradually increased;

the display module assembly still includes: the third rotating shaft structure and the fourth rotating shaft structure are positioned on one side of the magnetic supporting layer, which is far away from the flexible display screen; the third rotating shaft structure and the fourth rotating shaft structure are positioned in the folding-out area; the second magnetic structure layer is positioned between the third rotating shaft structure and the fourth rotating shaft structure; the arrangement direction of the third rotating shaft structure and the fourth rotating shaft structure is perpendicular to the arrangement direction of the third non-bending area and the fourth non-bending area when the outward-bending area is in a flat state.

8. The display module of claim 6,

when the outward folding area is in a flattening state and the inward folding area is in a flattening state, the magnetic support layer and the first magnetic structure layer in the inward folding area have the same polarity towards the magnetic poles of the opposite side;

when the outward folding area is in a bending state and the inward folding area is in a flattening state, the magnetic support layer and the first magnetic structure layer in the inward folding area face opposite magnetic poles in opposite directions and have opposite polarities;

the second non-bending area and the third non-bending area are the same non-bending area; the inward folding area and the outward folding area are positioned on two opposite sides of the second non-folding area;

the inward-folding area is in a water drop shape in a bending state; and/or the folded-out region is U-shaped in the bent state.

9. The display module assembly according to claim 5 or 6, wherein any of the hinge structures comprises a plurality of gears, and wherein the arrangement direction of the plurality of gears in any of the hinge structures is perpendicular to the axial direction of the gears; the axial direction of the gear is vertical to the arrangement direction of the non-bending areas on two sides connected with the gear in a state that the bending area is flattened; and adjacent gears are in meshed connection.

10. The display module of claim 1 or 6, wherein any of the magnetic structure layers comprises a variable magnetic pole structure layer comprising one or more electromagnetic coils; and/or, the magnetic support layer comprises one or more of the following materials: ferrite, neodymium iron boron, and samarium cobalt.