CN217955364U - Supporting plate, display module and electronic equipment - Google Patents

Abstract

The embodiment of the application provides a supporting plate, a display module and electronic equipment, wherein the supporting plate comprises a first plate surface and a second plate surface; the first board surface and the second board surface are arranged back to back, and the first board surface is used for being attached to the display panel; the support plate is provided with a first hollow area and a second hollow area in the bending area, and the first hollow area and the second hollow area are adjacently arranged along the direction vertical to the axial lead L; the first hollow-out area comprises a plurality of first bar-shaped grooves, and the first bar-shaped grooves penetrate from the first board surface to the second board surface; the second hollow area comprises a plurality of second strip-shaped grooves, the second strip-shaped grooves penetrate through the second plate surface from the first plate surface, and the plurality of second strip-shaped grooves are gradually increased along the direction away from the first hollow area. In this application, first bar groove and second bar groove can provide sufficient deformation space when the backup pad is crooked, reduce the internal stress in kink district. Meanwhile, the second hollowed-out area can play a role in buffering, so that the internal stress of the support plate during deformation is effectively dispersed, and the phenomenon of die stamping is relieved.

Description

Supporting plate, display module and electronic equipment

Technical Field

The embodiment of the application relates to the technical field of terminals, in particular to a supporting plate, a display module and electronic equipment.

Background

In recent years, the development of display screen technology of electronic devices has been accelerated, and particularly, the generation of flexible screens enables electronic devices to develop more product forms, wherein a folding screen device is an emerging product form at present. The display screen of the folding screen device mainly comprises a three-layer stacking structure, and the three-layer stacking structure sequentially comprises a supporting plate, a display screen panel and a cover plate from bottom to top. The support plate can comprise at least one bending area, and the bending area of the support plate is partially hollowed out by means of etching holes and the like, so that the bending performance is improved, and the display screen of the folding screen device has the bending capability in the bending area.

When the support plate is bent, the bending area of the support plate can generate internal stress due to deformation, and if the internal stress is overlarge, the support plate can be damaged. In order to reduce the internal stress that produces when the backup pad is buckled, the backup pad can include hollow out construction at the bending zone, and hollow out construction generally includes a plurality of bar holes that distribute to set up at the bending zone of backup pad. Hollow out construction provides bigger deformation space for the backup pad, has reduced the internal stress that produces when the backup pad is buckled, has improved the performance of buckling of backup pad.

Currently, the display panel and the support plate are generally attached together by Optical Cement (OCA). When the display screen takes place to buckle, the backup pad takes place deformation and with glue material, membrane material etc. and extrude each other, because the backup pad is high-modulus panel, compares in glue material, membrane material etc. texture harder, therefore the hollow out construction of backup pad forms the impression easily on gluing material, membrane material, leads to the display screen impression to appear in the vision.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a supporting plate, a display module and electronic equipment, so that the stamping phenomenon of a foldable screen is improved.

In a first aspect, an embodiment of the present application provides a supporting plate, which includes a first plate surface and a second plate surface; the first board surface and the second board surface are arranged back to back, and the first board surface is used for being attached to the display panel; the support plate comprises a bending area, and the support plate is used for bending along a preset axial lead L in the bending area; the support plate is provided with a first hollow area and a second hollow area in the bending area, and the first hollow area and the second hollow area are adjacently arranged along the direction vertical to the axial lead L; the first hollow-out area comprises a plurality of first bar-shaped grooves, and the first bar-shaped grooves penetrate from the first board surface to the second board surface; the length direction of the first bar-shaped grooves is parallel to the axial lead L, and the first bar-shaped grooves are distributed in a certain interval array along the direction vertical to the axial lead L; the second hollow-out area comprises a plurality of second bar-shaped grooves, the second bar-shaped grooves penetrate through the second board from the first board, the length direction of the second bar-shaped grooves is parallel to the axial lead L, the second bar-shaped grooves are distributed in an array mode along the direction perpendicular to the axial lead L, and the second bar-shaped grooves are gradually increased along the direction away from the first hollow-out area.

In the backup pad that this application embodiment provided, first bar groove and second bar groove run through to the second face by first face, can provide the sufficient deformation space of backup pad material when the backup pad is crooked, reduce the internal stress in kink zone. The second bar groove is along keeping away from the ascending interval of the direction in first fretwork district and gradually increasing, like this, the second fretwork district can play the cushioning effect when the backup pad is buckled, and the internal stress when effectively dispersing backup pad deformation avoids taking place the stress sudden change between bending region and plane district, alleviates the die stamping phenomenon.

In an optional implementation manner, the support plate is further provided with a first transition area in the bending area, the first transition area is arranged adjacent to the second hollow-out area along a direction perpendicular to the axial lead L, and is located on one side of the second hollow-out area, which is far away from the first hollow-out area; the second plate surface is provided with at least one first blind groove in the first transition area, the depth of the first blind groove is smaller than the thickness of the supporting plate, the length direction of the first blind groove is parallel to the axial lead L, and the first blind groove continuously extends to the other side end face from one side end face of the supporting plate along the axial lead L direction. The first blind grooves are spaced at a certain interval, so that a sufficient deformation space of a supporting plate material can be provided when the supporting plate is bent, and the internal stress of a bending area is reduced. Meanwhile, the first transition area does not penetrate through the first plate surface of the supporting plate, so that a stamping mark cannot be formed at the position of the first transition area.

In an optional implementation manner, the first plate surface is further provided with a groove in the first hollow-out area, the groove forms a certain depth along the depth direction of the first bar-shaped groove, and the bottom surface of the groove is communicated with the first bar-shaped groove; the length direction of the groove is parallel to the axial lead L, the length of the groove is the same as the width of the support plate in the direction parallel to the axial lead L, and the width of the groove is larger than or equal to the width of the first hollow area in the direction perpendicular to the axial lead L. In this way, the recess may cover all of the first bar-shaped grooves.

In an implementation manner, the adhesive tape further comprises a first adhesive layer, the first adhesive layer is disposed on the surface of the first plate surface and in the groove, the first adhesive layer and the bottom surface of the groove are located in the same plane, and the top surface of the first adhesive layer is a plane. Therefore, the first glue layer above the first strip-shaped groove has larger thickness, when the supporting plate is bent, the deformation amount of the first glue layer which overflows or contracts after being subjected to external force is smaller, and the first strip-shaped groove can not leave traces on the first glue layer, so that the forming of die marks can be avoided.

In an alternative implementation, the first adhesive layer is an integrated adhesive layer. Therefore, the top surface of the first adhesive layer cannot shrink to form a concave surface, and the attachment cannot be influenced.

In an alternative implementation, the device further comprises filling glue, and the filling glue is arranged in the first strip-shaped groove. Therefore, the first strip-shaped groove can be prevented from leaving traces on the first adhesive layer, and the forming of a die mark can be avoided.

In an optional implementation manner, the first hollow-out area further includes a plurality of second blind grooves, the length direction of the second blind grooves is parallel to the axis L, and the plurality of first bar-shaped grooves and the plurality of second blind grooves are alternately distributed at certain intervals along the direction perpendicular to the axis L and the direction parallel to the axis L; the second blind groove is formed in the second plate surface, and the depth of the second blind groove is smaller than the thickness of the supporting plate. The second blind groove does not penetrate through the supporting plate, and the second blind groove and the first bar-shaped groove are distributed in a staggered mode, so that the density of the first bar-shaped groove in the bending area is reduced, the bending performance of the supporting plate is guaranteed, and the problem of stamping can be solved.

In an alternative implementation manner, two adjacent first strip-shaped grooves or two adjacent second blind grooves are staggered with a certain distance along the length direction, so that one end of one first strip-shaped groove is positioned in the central region of one second blind groove.

In an alternative implementation mode, the projection shapes of the first strip-shaped groove and the second blind groove in the thickness direction of the supporting plate are the same.

In an optional implementation manner, the second strip-shaped groove is of an equal-width structure, and two ends of the second strip-shaped groove are of a rounded structure. Thus, the side surfaces of the second groove are entirely smooth, and large stress concentration does not occur when the second groove is bent.

In a second aspect, an embodiment of the present application further provides a supporting plate, which includes a first plate surface and a second plate surface;

the first board surface and the second board surface are arranged back to back, and the first board surface is used for being attached to the display panel;

the support plate comprises a bending area, and the support plate is used for bending along a preset axial lead L in the bending area; the support plate is provided with a first hollow-out area and a second transition area in the bending area, and the first hollow-out area and the second transition area are adjacently arranged along the direction vertical to the axial lead L;

the first hollow-out area comprises a plurality of first bar-shaped grooves, and the first bar-shaped grooves penetrate from the first board surface to the second board surface; the length direction of the first strip-shaped grooves is parallel to the axial lead L, and the first strip-shaped grooves are distributed in a certain interval array along the direction vertical to the axial lead L;

the second transition zone comprises a plurality of transition blind grooves, the depth of each transition blind groove is smaller than the thickness of the support plate, the length direction of each transition blind groove is parallel to the axial lead L, and the transition blind grooves continuously extend from one side end face of the support plate to the other side end face along the axial lead L direction; the depth of the transition blind groove is gradually reduced along the direction far away from the first hollow-out area. Like this, first bar groove is run through to the second face by first face, can provide the sufficient deformation space of backup pad material when the backup pad is crooked, reduces the internal stress in kink district. The degree of depth of transition blind slot reduces along keeping away from first fretwork district in the direction gradually, and internal stress when effectively dispersing backup pad deformation avoids taking place the stress sudden change between bending zone and plane district, alleviates the die mark phenomenon.

In a third aspect, an embodiment of the present application further provides a display module, including: a cover plate, a display screen panel and the support plate of the first or second aspect; the display panel is attached to the first plate surface of the supporting plate through optical cement; the cover plate is attached to one surface of the display screen panel, back to the support plate, through optical cement.

In a fourth aspect, an embodiment of the present application further provides an electronic device, which includes one or more display screens, where at least one display screen includes the display module of the third aspect.

Drawings

FIG. 1 is a schematic structural diagram of a folding screen apparatus according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a display screen of a folding screen device provided in an embodiment of the present application;

FIG. 3 is a schematic view of the support panel shown in an embodiment of the present application after deployment;

FIG. 4 is a schematic structural view of a support plate in a bending region according to an embodiment of the present application;

FIG. 5 is a schematic cross-sectional view of a support plate in a bending region according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a first support plate according to an embodiment of the present disclosure;

fig. 7 is a schematic view of a display screen of the folding screen apparatus in a folded state of the body according to the embodiment of the present application;

FIG. 8 is a plan view of the support plate of FIG. 6;

fig. 9 is a schematic structural diagram of a first hollow-out region and a second hollow-out region provided in the embodiment of the present application;

FIG. 10 is a schematic structural diagram of a second support plate according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a first hollow-out area, a second hollow-out area, and a first transition area according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of a third support plate according to an embodiment of the present application;

FIG. 13 is a cross-sectional view of a third support plate shown in an embodiment of the present application;

fig. 14 is a schematic structural diagram of a first hollow-out region and a second transition region provided in the present embodiment;

FIG. 15 is a schematic view of a first elongated slot provided in an embodiment of the present application;

FIG. 16 is a schematic view of a second stripe groove according to an embodiment of the present application;

FIG. 17 is a schematic structural view of a fourth support plate according to the embodiment of the present application;

FIG. 18 is a schematic structural diagram of a fifth supporting plate according to an embodiment of the present application;

fig. 19 is a cross-sectional view of the structure of the support plate shown in fig. 18.

The display panel comprises a body 10, a display screen 11, a support plate 21, a display screen panel 22, a cover plate 23, a bending region 31, a plane region 32, a hollow structure 40, a strip groove 41, an inward bending region 51, an outward bending region 52, a support plate 100, a first plate surface 110, a second plate surface 120, a first hollow region 200, a first strip groove 210, a first array unit 220, a first end surface 230, a second blind groove 240, a third array unit 250, a second hollow region 300, a second strip groove 310, a second array unit 320, a second transition region 400, a transition blind groove 410, a first transition region 500, a first blind groove 510, a first adhesive layer 600, a groove 700, an adhesive filling 800, a second adhesive layer 910, and a third adhesive layer 920.

Detailed Description

The terms "first", "second" and "third", etc. in the description and claims of this application and the description of the drawings are used for distinguishing between different objects and not for limiting a particular order.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described herein as "exemplary" or "such as" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The terminology used in the description of the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application, which will be described in detail below with reference to the accompanying drawings.

In recent years, the display screen technology of electronic devices has been developed rapidly, and particularly, the generation of flexible screens enables the electronic devices to develop more product forms, wherein a folding screen device is a product form emerging at present.

Currently, the folding screen device may be divided into an inner folding screen device and an outer folding screen device according to the difference of the folding direction of the display screen 11. Fig. 1 is a schematic structural diagram of a folding screen device according to an embodiment of the present application. Wherein, the structure a in fig. 1 is a schematic structural view of the inner folding screen device, and the structure b in fig. 1 is a schematic structural view of the outer folding screen device. As shown in a structure a of fig. 1, a body 10 of the internal folding screen device can be folded toward a display screen 11, and the display screen 11 is hidden inside the body 10 after the body 10 is folded, thereby forming an effect that the display screen 11 is hidden when the body 10 is folded and appears when the body 10 is unfolded; as shown in a structure b in fig. 1, the body 10 of the external folding screen device can be folded toward the back side of the body 10, and the display screen 11 surrounds the outside of the body 10 after the body 10 is folded, so that the display screen 11 surrounds the body 10 in the folded state of the body 10 to form a surrounding screen, and a normal straight screen effect is exhibited in the unfolded state of the body 10.

It can be understood that, because the display screen of the folding screen device needs to be bent frequently, compared with the electronic device in the conventional form, the display screen of the folding screen device needs to be designed in some adaptability according to the use scene of the folding screen device, so that the display screen can be kept in a good support form in different opening and closing states of the body.

Fig. 2 is a schematic structural diagram of a display screen of a folding screen device according to an embodiment of the present application. As shown in fig. 2, the display screen of the folding screen device may include a three-layer stack structure including a support plate 21, a display screen panel 22 (panel), and a cover plate 23 (cover) in this order from the bottom up. Wherein: the support plate 21 is the lowermost layer of the display screen, and is generally made of a high modulus plate material such as metal or glass, for example, stainless steel, titanium alloy, ultra-thin glass, polyvinyl alcohol high modulus fiber PVA, etc., or other materials with certain rigidity, and the support plate 21 is used for supporting and maintaining the shape of the display screen in various opening and closing states of the body. The display screen panel 22 is a display screen middle layer, and may be attached above the support plate 21 by a Pressure Sensitive Adhesive (PSA), a PET tape (PET), and/or a PI tape (PI), and the display screen panel 22 may be a flexible Organic Light-Emitting Diode (OLED) display screen panel, or may be other flexible (i.e., bendable) display screen panels, such as a flexible Micro LED display screen panel, a Mini LED display screen panel, and the like, which is not limited in the embodiment of the present application. The cover plate 23 is the uppermost layer of the display panel, and may be attached above the display panel 22 by an Optical Clear Adhesive (OCA), generally, in the electronic device with non-foldable screen, the cover plate 23 is generally made of glass, and in the electronic device with foldable screen, the cover plate 23 may be made of a transparent thin film material, such as a transparent polyimide film CPI, or other materials, which is not limited in this embodiment.

Fig. 3 is a schematic view of the support plate shown in the embodiment of the present application after being unfolded. As shown in fig. 3, the supporting plate 21 may include at least one bending region 31, and the region outside the bending region 31 is a planar region 32. Here, the bending region 31 refers to a region where bending occurs when the body of the folding screen apparatus is folded, and the flat region 32 refers to a region where bending does not occur when the body of the folding screen apparatus is folded. It is obvious that the number of bending zones 31 is determined by the number of folds of the body of the folding screen device, and that the display screen module may comprise one bending zone 31 if the body of the folding screen device is folded only once (i.e. a single folding screen device), or two bending zones 31 if the body of the folding screen device is folded twice (i.e. a double folding screen device). As an example, the display panel module shown in fig. 3 includes a bending region 31 distributed up and down, and flat regions 32 located at the left and right sides of the bending region 31 for implementing left and right bending of the body of the folding screen apparatus. The number of bending regions 31 of the display panel module is not within the scope of the discussion of the embodiments of the present application, and therefore will not be described in greater detail below.

Fig. 4 is a schematic structural diagram of a support plate in a bending region according to an embodiment of the present application. As shown in fig. 4, in order to improve the bending performance, the supporting plate 21 is grooved in the bending region 31 according to a specific pattern (also referred to as a pattern), so as to form a hollow structure 40. The Pattern is generally an array of grooves 41 extending in the direction of the axis L along which the support plate 21 is bent. The strip-shaped groove 41 is generally in an intermittent structure in the direction of the axis L to ensure structural continuity of the support plate 21 in the direction perpendicular to the axis L. However, in the process of bending the display panel, the bending region 31 is bent by an external force, and since the support plate 21 is a high-modulus plate material, it is harder than a film material such as the display panel 22, and a mold mark is easily formed on the display panel 22.

Fig. 5 is a schematic cross-sectional view of a support plate in a bending region according to an embodiment of the present application. The cause of the generation of the stamp will be described with reference to fig. 5. Bending zone 31 is when taking place to buckle, lacks the transition between hollow out construction 40 and other regions of bending zone 31, and the easy sudden change of internal stress, after folding repeatedly, hollow out construction 40's boundary position can form the impression on gluey material and display screen panel isotructure, finally forms the ascending stamp of axial lead L side, and the stamp is transmitted to folding screen surface layer by layer for "vertical line" appears in folding screen surface in the vision. Simultaneously, because the bar groove 41 is discontinuous structure, 31 surperficial unevenness in bending zone for glue structures such as material and display screen panel and produce the impression in bar groove 41 department easily when the laminating, the impression position specifically lies in the edge of bar groove 41, so finally can form the stamp of perpendicular to axial lead L direction, make folding screen surface "cross striation" appear in the vision.

To the problem that present folding screen exists, this application embodiment provides a backup pad, can improve the buffer capacity in folding screen bending zone when guaranteeing folding screen's folding performance, avoids the die mark to produce.

Fig. 6 is a schematic structural diagram of a first support plate according to an embodiment of the present application. As shown in fig. 6, the support plate 100 includes two plate surfaces, i.e., an upper plate surface and a lower plate surface, and for convenience of description, in the embodiment of the present invention, a plate surface of the support plate 100 attached to the display screen panel is referred to as a first plate surface 110, and a plate surface of the support plate 100 opposite to the first plate surface 110 is referred to as a second plate surface 120. The support plate 100 includes at least one bending region 31, and the support plate 100 can be bent along a predetermined axis L at the bending region 31, so that after the support plate 100 provided in the embodiment of the present application is combined with a display panel and a cover plate to form a display screen, the display screen can also be bent along the axis L at the bending region 31.

Fig. 7 is a schematic view of a display screen of a folding screen device shown in an embodiment of the present application in a folded state of a body, and as shown in fig. 7, a bending region may be divided into an inward bending region 51 or an outward bending region 52 according to a difference in a bending direction of a support plate 100, where the inward bending region 51 refers to a region of the support plate 100 bent toward a display screen panel, the outward bending region 52 refers to a region of the support plate 100 bent away from the display screen panel, and a bending degree of the inward bending region 51 is greater than a bending degree of the outward bending region 52. Fig. 7 shows only one folded state of the fuselage, and the support plate provided in the embodiment of the present application may also be used to form other folded configurations, which is not particularly limited in the present application.

Fig. 8 is a plan view of the structure of the support plate shown in fig. 6. As shown in fig. 6 and 8, the bending region 31 of the support plate 100 may be provided with a first hollow-out region 200, and the first hollow-out region 200 includes a plurality of first bar-shaped grooves 210. The length direction of each first linear groove 210 is parallel to the axis L. The plurality of first bar-shaped grooves 210 are arranged in a spaced array along a direction perpendicular to the axis L, and the plurality of first bar-shaped grooves 210 are symmetrically arranged with the axis L as a symmetry axis. Thus, the bending region 31 of the support plate 100 can be bent along the axial line L. The first bar-shaped groove 210 is integrally formed from the first plate surface 110 of the support plate 100 to the second plate surface 120 of the support plate 100, so as to improve the bending capability of the support plate 100 in the bending region 31.

As further shown in fig. 6 and 8, the bending region 31 of the supporting plate 100 may further include a second hollow-out region 300, and the second hollow-out region 300 and the first hollow-out region 200 are disposed adjacent to each other along a direction perpendicular to the axis L. The second hollow area 300 may be composed of a plurality of second stripe grooves 310. The length direction of each second stripe-shaped groove 310 is parallel to the axis L. The plurality of second stripe grooves 310 are distributed in an array along a direction perpendicular to the axis L, and the plurality of second stripe grooves 310 are gradually spaced apart from each other in a direction away from the first hollow area 200. The second groove 310 extends from the first plate surface 110 of the support plate 100 to the second plate surface 120 of the support plate 100.

It should be noted that, as shown in fig. 9, the bending region 31 may include at least two second hollow-out regions 300, and the two second hollow-out regions 300 are respectively disposed at two sides of the first hollow-out region 200 and are symmetrically distributed with the axis L as a symmetry axis, so that the bending region 31 is bent more smoothly.

The overall width of the first and second hollow-out regions 200 and 300 is determined by the width of the bending region 31.

Compare in the backup pad that does not have second fretwork area 300, the backup pad 100 of this application embodiment can play the cushioning effect when buckling, and the internal stress that produces when effectively dispersing backup pad 100 deformation avoids buckling area 31 stress concentration, when guaranteeing backup pad 100 to support and buckle the performance, avoids taking place the sudden change of stress between buckling area 31 and plane area 32. In this way, the "longitudinal" impression between the bending area 31 and the flat area 32 can be relieved after the display screen panels are attached.

Fig. 10 is a schematic structural diagram of a second supporting plate according to an embodiment of the present application. As shown in fig. 10, on the basis of the first support plate shown in the embodiment of the present application, the bending region 31 of the second support plate 100 shown in the embodiment of the present application may further be provided with a first transition region 500, where the first transition region 500 is disposed adjacent to the second hollow-out region 300 along a direction perpendicular to the axial line L, and is located on a side of the second hollow-out region 300 away from the first hollow-out region 200. The first transition zone 500 may include one or more first blind grooves 510, and the length direction of the first blind grooves 510 is parallel to the shaft axis L. When the first transition area 500 includes a plurality of first blind grooves 510, the plurality of first blind grooves 510 are distributed in a spaced array along a direction perpendicular to the axis L, so as to ensure that the bending area 31 can be bent smoothly along the axis L. The first blind groove 510 is formed on the second plate surface 120 of the support plate 100, and the depth of the first blind groove 510 is smaller than the thickness of the support plate 100, i.e., the first blind groove 510 does not penetrate through the support plate 100. The length of the first blind groove 510 is preferably the same as the width of the support plate 100 in a direction parallel to the axis L, so that the first blind groove 510 extends continuously from one side end surface to the other side end surface of the support plate 100 in the direction of the axis L so as to penetrate the support plate 100 in the direction of the axis L.

It should be noted that, as shown in fig. 11, the bending region 31 of the supporting plate 100 may include at least two first transition regions 500, one first transition region 500 is disposed on one side of one second hollow-out region 300 away from the first hollow-out region 200, and the other first transition region 500 is disposed on one side of the other second hollow-out region 300 away from the first hollow-out region 200, so as to be symmetrically distributed about the axis L, so that the bending region 31 is bent more smoothly.

The overall width of the first hollow-out region 200, the second hollow-out region 300 and the first transition region 500 is determined by the width of the bending region 31.

The first transition area 500 includes the first blind grooves 510 with a width, a number and an interval, which can be determined by the bending degree of the first blind grooves.

The second hollow 300 may also have internal stress concentration when the support plate 100 is bent. Since the second hollow-out area 300 penetrates through the first plate surface 110 of the supporting plate 100, a partial structure of the second hollow-out area 300 may also leave a mold on the adhesive material or the film material, which finally results in a "longitudinal stripe" mold on the display screen. Therefore, a portion of the second hollow-out area 300 may be replaced with the first transition area 500. Because the first blind grooves 510 in the first transition area 500 have a certain interval therebetween, when bending, the material of the support plate 100 has a sufficient deformation space for reducing internal stress, and meanwhile, because the first transition area 500 does not penetrate through the first plate surface 110 of the support plate 100, the first transition area 500 does not form a mold mark at the position where the display screen panel of the support plate 100 is attached through the first plate surface 110 when bending. Thus, not only can enough deformation space be provided for the material of the support plate 100 when the support plate 100 is bent, but also the internal stress can be reduced, the formation of 'longitudinal grain' die marks can be avoided, and the bending performance can be improved.

Fig. 12 is a schematic structural view of a third support plate according to an embodiment of the present application, and fig. 13 is a cross-sectional view of the third support plate according to the embodiment of the present application. As shown in fig. 12 and 13, the bending region 31 of the support plate 100 may further be provided with a second transition region 400, the second transition region 400 and the first hollow-out region 200 are adjacently disposed along a direction perpendicular to the axis L, the second transition region 400 may be composed of a plurality of transition blind grooves 410, the length direction of each transition blind groove 410 is parallel to the axis L, the plurality of transition blind grooves 410 are distributed in a certain interval array along the direction perpendicular to the axis L, and the intervals between any two adjacent transition blind grooves 410 are the same. The transition blind slot 410 is formed on the second plate surface 120 of the support plate 100, and the depth of the transition blind slot 410 is smaller than the thickness of the support plate 100, i.e. the transition blind slot 410 does not penetrate through the support plate 100. The transition blind slot 410 may have a depth in the range of 0.1t to 1t, where t is the thickness of the support plate 100. In a direction away from the first hollow area 200, the opening depth of the transition blind grooves 410 may gradually decrease, that is, the depth of the transition blind grooves 410 in the same row in the array is the same, and the depth of the transition blind grooves 410 in the adjacent row in the direction away from the first hollow area 200 gradually decreases. The length of the transition blind groove 410 is preferably the same as the width of the support plate 100 in a direction parallel to the axis L, so that the transition blind groove 410 continuously extends from one side end face to the other side end face of the support plate 100 in the direction of the axis L so as to penetrate the support plate 100 in the direction of the axis L.

It should be noted that, as shown in fig. 14, the bending area 31 of the supporting plate 100 may at least include two second transition areas 400, and the two second transition areas 400 are respectively disposed at two sides of the first hollow-out area 200 and are symmetrically distributed about the axis L, so that the bending area 31 is bent more smoothly.

The overall width of the first hollow-out region 200 and the second transition region 400 is determined by the width of the bending region 31.

When backup pad 100 of this application embodiment is buckling, second transition area 400 can play the cushioning effect, and the internal stress when effectively dispersing backup pad 100 deformation avoids buckling area 31 stress concentration, when guaranteeing backup pad 100 to support and buckle the performance, avoids taking place the stress sudden change between buckling area 31 and plane district 32, like this, after the display screen laminating, "vertical" impression between buckling area 31 and the plane district 32 can be alleviated.

In some implementations, the intervals of the plurality of transition blind grooves 410 in the direction away from the first hollow-out area 200 may also gradually increase.

The implementation of the first linear slot is further described below with reference to fig. 15.

Fig. 15 is a schematic view of a first linear groove provided in an embodiment of the present application.

As shown in fig. 15, the plurality of first bar-shaped grooves 210 are distributed in a rectangular array. The distribution of the plurality of first bar-shaped grooves 210 in the bending region 31 can be regarded as two adjacent first bar-shaped grooves 210 as a first array unit 220, and the first array unit 220 is obtained by rectangular array along the length direction of the first bar-shaped grooves 210 and the width direction of the first bar-shaped grooves 210. For convenience of description, the two first linear grooves 210 in the first array unit 220 will be referred to herein as a first linear groove 210a and a first linear groove 210b. The first bar-shaped groove 210b is positioned at one side of the first bar-shaped groove 210a in the width direction of the first bar-shaped groove 210 and is offset from the first bar-shaped groove 200a in the length direction by a distance, which may be half of the first bar-shaped groove 210, such that one end of one of the first bar-shaped grooves 210 is positioned at the center region of the other first bar-shaped groove 210. In this way, after the first array units 220 are arranged in a rectangular array, any two first bar-shaped grooves 210 adjacent to each other in the width direction are distributed along the length direction in a staggered manner, so as to ensure the bending performance and the support performance of the bending region 31.

With continued reference to fig. 15, the first linear slot 210 may include a first slot segment 211 and second slot segments 212 located at opposite ends of the first slot segment 211. The first slot segment 211 and the second slot segment 212 may have an equal-width structure, and the width of the second slot segment 212 is greater than that of the first slot segment 211, so that the first bar-shaped slot 210 forms a dumbbell-shaped structure with two wide ends and a thin middle part. Thus, the second groove section 212 with a larger width can form a fillet transition with a larger radius at two ends of the first bar-shaped groove 210, which is beneficial to reducing stress concentration during bending and avoiding generating a die mark.

As shown in fig. 15, in the array formed by the plurality of first bar-shaped grooves 210, the vicinity of the center of each first bar-shaped groove d may include the ends of at most four other first bar-shaped grooves 210 (e.g., first bar-shaped grooves e, f, g, h), and since the first bar-shaped grooves 210 have a certain interval therebetween, a large non-grooved area exists between the first bar-shaped groove d and the first bar-shaped grooves e, f, g, h, and when the display screen is bent, the non-grooved area may generate a large stress, which may easily generate a stamp. The center of each first linear groove 210 therefore also includes a transition zone 213, and the side walls of the first linear groove 210 are convex on both sides of the transition zone 213 in the shape of a circular arc or spline, so that the width of the first linear groove 210 in the transition zone 213 is greater than the width of the first groove segment 211. Thus, the transition region 213 breaks the structural continuity between the first linear groove d and the first linear grooves e, f, g, and h, reduces stress, and prevents generation of a stamp.

In one example, as shown in fig. 15, the distance D between adjacent first bar-shaped grooves 210 in the width direction may be 0.08-0.3mm. The appropriate distance D is easy to implement industrially while the generation of a stamp can be better avoided.

The implementation of the second stripe groove 310 is further explained below with reference to fig. 16.

Fig. 16 is a schematic view of a second stripe groove according to an embodiment of the present application.

As shown in fig. 16, the plurality of second stripe grooves 310 are distributed in a rectangular array. The distribution of the plurality of second grooves 310 in the bending region 31 can be regarded as two adjacent second grooves 310 as the second array unit 320, and the second array unit 320 is obtained by rectangular array along the length direction of the second grooves 310 and the width direction of the second grooves 310. For convenience of description, the two second stripe grooves 310 in the second array unit 320 are referred to herein as a second stripe groove 310a and a second stripe groove 310b. The second stripe groove 310b is located at one side of the second stripe groove 310a in the width direction of the second stripe groove 310a and is staggered from the second stripe groove 310a in the length direction by a distance, which may be a half of the second stripe groove 310, such that one end of one of the second stripe grooves 310 is located at the central region of the other second stripe groove 310. In this way, after the basic array unit 310 is rectangular-arrayed, any two second stripe grooves 310 adjacent in the width direction are arranged to be shifted from each other in the length direction.

With reference to fig. 16, the second stripe groove 310 may have a structure with an equal width in the length direction, and both ends of the second stripe groove 310 in the length direction may be in fillet transition, so that the side of the second stripe groove 310 is smooth as a whole, and a large stress concentration may not occur when bending occurs.

To ensure smooth bending of the bending region 31, the width of the second bar-shaped groove 310 may be equal to the width of the first groove section 211 of the first bar-shaped groove 210, and the overall length of the second bar-shaped groove 310 may be equal to the overall length of the first bar-shaped groove 210. The interval between two adjacent second stripe-shaped grooves 310 in the length direction is equal to the interval between two adjacent first stripe-shaped grooves 210.

At the adjacent position of the rectangular array formed by the first strip-shaped groove 210 and the rectangular array formed by the second strip-shaped groove 310, the end of the second strip-shaped groove 310 in the length direction may be located in the central area of the first strip-shaped groove 210, so that any two adjacent first strip-shaped grooves 210 and second strip-shaped grooves 310 in the width direction are distributed along the length direction in a staggered manner, which ensures the bending performance of the bending region 31 and simultaneously maintains the support performance of the bending region 31.

In one example, as shown in fig. 16, for convenience of description, three adjacent second stripe grooves 310 in the width direction of the second hollow area 300 are formed as a second stripe groove 310j, a second stripe groove 310k and a second stripe groove 310L, and then a distance between the second stripe groove 310j and the second stripe groove 310k is L1, and a distance between the second stripe groove 310k and the second stripe groove L is L2. The second strip groove 310 may satisfy the following dimensional constraints: the distance L (e.g., L1 and L2 described above) between adjacent second stripe grooves 310 in the width direction may be 0.08 to 1mm, and the increasing range of the distance L in the width direction may be 0.05 to 0.5mm, i.e., 0.05mm < L2-L1 < 0.5mm. The size restriction can reduce the stress and avoid the die mark, and is easy to realize in the technical process, thereby improving the yield and the reliability of the technical production.

In some cases, for example, when the requirement on the bending angle of the first hollow-out area 200 is greater, the structure of the second stripe groove 310 may also be the same as that of the first stripe groove 210, so as to increase the slotting area.

Fig. 17 is a schematic structural diagram of a fourth support plate according to an embodiment of the present application. The fourth supporting plate shown in the embodiment of the present application can be modified on the basis of any one of the supporting plates shown in the above embodiments. As shown in fig. 17, the first hollow-out area 200 of the supporting plate 100 is further provided with a groove 700, and the groove 700 is formed on the first plate surface 110. The groove 700 is formed at a depth in the depth direction of the first linear groove 210, which is smaller than the thickness of the support plate 100, so that the bottom surface of the groove 700 can communicate with the first linear groove 210. The length direction of the groove 700 is parallel to the axis L, the whole body is symmetrically distributed by taking the axis L as a symmetry axis, the length of the groove 700 is the same as the width of the support plate 100 in the direction parallel to the axis L, that is, the groove 700 continuously extends from one side end face of the support plate 100 to the other side end face along the axis L direction, so as to penetrate through the support plate 100 along the axis L direction. The width of the groove 700 is greater than or equal to the width of the first hollow-out area 200 in the direction perpendicular to the axis L, so that the groove 700 covers all the first linear grooves 210, and the bottom surface of the groove 700 can communicate with all the first linear grooves 210.

With reference to fig. 17, the supporting board 100 is further provided with a first adhesive layer 600, the first adhesive layer 600 is specifically disposed on the surface of the first board surface 110 and in the groove 700, the first adhesive layer 600 is closely attached to the first board surface 110, the bottom surface of the groove 700 and the side surface of the groove 700, the first adhesive layer 600 is filled and then located in the same plane with the bottom surface of the groove 700, and the top surface of the first adhesive layer 600 is a plane. The first bar-shaped groove 210 of the first hollow-out area 200 is further provided with filling glue 800, and the filled filling glue 800 and the non-grooved area of the support plate 100 are located in the same plane.

The first adhesive layer 600 may be, for example, an adhesive layer formed by an optical adhesive, a pressure-sensitive adhesive, or other liquid adhesives. The filling adhesive 800 may be an optical adhesive or a pressure sensitive adhesive, and may be the same adhesive material as the first adhesive layer 600 or different adhesive materials.

In the embodiment of the present application, the first adhesive layer 600 above the first stripe-shaped groove 210 has a larger thickness, when the folding screen is folded, the deformation amount of the first adhesive layer 600 overflowing or contracting after being subjected to an external force is smaller, the first end surface 230 does not leave any trace on the first adhesive layer 600, and a "cross-grain" impression can be avoided. Meanwhile, as the filling adhesive 800 is arranged in the first linear groove 210, the first adhesive layer 600 does not overflow into the first linear groove 210, so that the first adhesive layer 600 cannot be restored to the original state, and the formation of a stamp can be avoided. Under the condition of not increasing the thickness of the display module, the transverse stripe condition of the module is improved. The first adhesive layer 600 can be integrally filled, so that the top surface of the first adhesive layer 600 does not shrink to form a concave surface, and the attachment is not affected.

As shown in fig. 17, the first adhesive layer 600 is further provided with a second adhesive layer 910 and a third adhesive layer 920, and the support plate 100, the first adhesive layer 600, the second adhesive layer 910 and the third adhesive layer 920 are stacked from bottom to top. The second adhesive layer 910 may be an adhesive layer formed of PET (Polyethylene terephthalate) and/or PI (Polyimide) tape, and the third adhesive layer 920 may be an adhesive layer formed of Pressure Sensitive Adhesive (PSA). The supporting board 100 can be attached to the display screen panel through the first adhesive layer 600, the second adhesive layer 910 and the third adhesive layer 920, and the attaching surface is flat. The cured first adhesive layer 600 may also form an "isolation structure" to prevent the second adhesive layer 910 and the third adhesive layer 920 from overflowing into the first stripe-shaped groove 210 to form a mold.

Fig. 18 is a schematic structural view of a fifth supporting plate provided in an embodiment of the present application, and fig. 19 is a sectional view of the supporting plate structure shown in fig. 18. As shown in fig. 18 and 19, the bending region 31 of the support plate 100 is provided with a first hollow-out region 200, the first hollow-out region 200 is composed of a plurality of first bar-shaped grooves 210 and a plurality of second blind grooves 240 which are alternately distributed in the bending region 31, the plurality of first bar-shaped grooves 210 and the plurality of second blind grooves 240 are alternately distributed at certain intervals along a direction perpendicular to the axis L and a direction parallel to the axis L, that is, the length directions of the first bar-shaped grooves 210 and the second blind grooves 240 are parallel to the axis L, and the plurality of first bar-shaped grooves 210 and the plurality of second blind grooves 240 are symmetrically distributed on the whole by taking the axis L as a symmetry axis. Thus, the bending region 31 of the support plate 100 can be bent along the axial line L. The first bar-shaped grooves 210 and the second blind grooves 240 may have the same shape and be distributed in a staggered manner to form a continuous and uniformly distributed array, wherein the first bar-shaped grooves 210 integrally penetrate from the first plate surface 110 of the support plate 100 to the second plate surface 120 of the support plate 100, the second blind grooves 240 are formed on the second plate surface 120 of the support plate 100, and the depth of the second blind grooves 240 is smaller than the thickness of the support plate 100, i.e., the second blind grooves 240 do not penetrate through the support plate 100.

As shown in fig. 18, the first bar-shaped grooves 210 and the second blind grooves 240 are distributed in a rectangular array. In the groove length direction, the distribution of the first bar-shaped groove 210 and the second blind groove 240 in the bending region 31 can be regarded as that two adjacent first bar-shaped grooves 210 and two adjacent second blind grooves 240 are used as a third array unit 250, and the third array unit 250 is obtained by rectangular array along the groove length direction and the groove width direction. For convenience of description. The two first bar-shaped grooves 210 in the third array unit 250 are referred to herein as a first bar-shaped groove 210c and a first bar-shaped groove 210d, and the two second blind grooves 240 in the third array unit 250 are referred to herein as a second blind groove 240a and a second blind groove 240b. The second blind groove 240a is located at one side of the first bar-shaped groove 210c along the length direction of the first bar-shaped groove 210, and the second blind groove 240b is located at one side of the first bar-shaped groove 210d along the length direction of the first bar-shaped groove 210. The first bar-shaped groove 210d and the second blind groove 240b are located at one side of the first bar-shaped groove 210a and the second blind groove 240a in the width direction of the first bar-shaped groove 210, and are offset from the first bar-shaped groove 210a and the second blind groove 240a by a distance, which may be half of the first bar-shaped groove 210, such that one end of one of the first bar-shaped grooves 210 is located in the central region of the other first bar-shaped groove 210, and one end of one of the second blind grooves 240 is located in the central region of the other second blind groove 240. In this way, after the third array unit 250 is rectangular arrayed, any two first bar-shaped grooves 210 and any two second blind grooves 240 adjacent in the width direction are mutually staggered in the length direction.

The first stripe-shaped grooves 210 and the second blind grooves 240 can be distributed according to a quantity ratio 1:1. Thus, the density of the first bar-shaped grooves 210 in the bending region 31 is reduced, and the 'cross-grain' impression of the first bar-shaped grooves 210 on the plastic material is weakened. The number ratio of the first bar-shaped groove 210 to the second blind groove 240 can be adjusted to other ratios according to the actual required bending effect, and is not limited to 1:1.

The depth of the second blind groove 240 may range from 0.5t to 1t, where t is the thickness of the support plate 100, and the specific depth is not limited in this application.

In some implementation manners, the shapes of the first bar-shaped groove 210 and the second blind groove 240 may be the shapes of the first bar-shaped groove 210 of any implementation manner provided in the foregoing embodiment, that is, the projection shapes of the first bar-shaped groove 210 and the second blind groove 240 in the thickness direction of the support plate are the same, which is specifically referred to the foregoing embodiment and will not be described herein again.

Referring to fig. 19, the supporting plate 100 may be attached to the display screen panel through a glue layer disposed on the first plate surface 110, specifically, the supporting plate 100 may be covered with a first glue layer 600, a second glue layer 910 and a third glue layer 920, and the supporting plate 100, the first glue layer 600, the second glue layer 910 and the third glue layer 920 are stacked from bottom to top. The first adhesive layer 600 may be an adhesive layer formed by an optical adhesive, or may be an adhesive layer formed by a pressure sensitive adhesive, and the second adhesive layer 910 may also be another liquid adhesive, and may be an adhesive layer formed by a PET (Polyethylene terephthalate) tape and/or a PI (Polyimide, PI) tape, and the third adhesive layer 920 may be an adhesive layer formed by a Pressure Sensitive Adhesive (PSA).

The embodiment of the application still provides a display module assembly, and this display module assembly includes backup pad, display screen panel and the apron that each implementation of the embodiment of the application provided, and display panel passes through the first face of optical cement laminating in the backup pad, and the apron passes through the one side of optical cement laminating in the one side of the backup pad of display screen panel back to. Therefore, the display module does not generate impression and crack appearance and has good display performance.

The embodiment of the application also provides an electronic device, and the electronic device can be a folding screen device, a scroll screen device or any electronic device with a bendable display screen. The electronic device may include one or more display screens, where at least one display screen includes the display module provided in the embodiments of the present application, or at least one display screen includes the support plate provided in the first embodiment of the present application. For example, the electronic device may be an inner folding screen device or an outer folding device.

The above embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above is only the embodiments of the present invention, and is not intended to limit the protection scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. A support panel, comprising a first panel (110) and a second panel (120);

the first board surface (110) and the second board surface (120) are arranged back to back, and the first board surface (110) is used for being attached to a display panel;

the supporting plate comprises a bending area (31), and the supporting plate is used for bending along a preset axial lead L in the bending area (31); the support plate is provided with a first hollow-out area (200) and a second hollow-out area (300) in the bending area (31), and the first hollow-out area (200) and the second hollow-out area (300) are adjacently arranged along the direction perpendicular to the axial lead L;

the first hollowed-out area (200) comprises a plurality of first bar-shaped grooves (210), and the first bar-shaped grooves (210) penetrate from the first board surface (110) to the second board surface (120); the length direction of the first bar-shaped groove (210) is parallel to the axis L, and a plurality of the first bar-shaped grooves (210) are distributed in a certain interval array along the direction vertical to the axis L;

the second hollow-out area (300) includes a plurality of second bar groove (310), second bar groove (310) by first face (110) run through extremely second face (120), the length direction and the axial lead L of second bar groove (310) are parallel, and are a plurality of second bar groove (310) are array distribution along the direction of perpendicular to axial lead L, and are a plurality of second bar groove (310) are along keeping away from the direction interval crescent of first hollow-out area (200).

2. The support plate according to claim 1, wherein the support plate is further provided with a first transition region (500) at the bending region (31), the first transition region (500) is disposed adjacent to the second hollow-out region (300) along a direction perpendicular to the axial line L, and is located at a side of the second hollow-out region (300) far away from the first hollow-out region (200);

the second plate surface (120) is provided with at least one first blind groove (510) in the first transition area (500), the depth of the first blind groove (510) is smaller than the thickness of the support plate, the length direction of the first blind groove (510) is parallel to the axial lead L, and the first blind groove (510) continuously extends from one side end face of the support plate to the other side end face along the axial lead L direction.

3. The supporting plate according to claim 1, wherein the first plate surface (110) is further provided with a groove (700) at the first hollow area (200), the groove (700) forms a certain depth along the depth direction of the first bar-shaped groove (210), and the bottom surface of the groove (700) is communicated with the first bar-shaped groove (210); the length direction of the groove (700) is parallel to the axial lead L, the length of the groove (700) is the same as the width of the support plate in the direction parallel to the axial lead L, and the width of the groove (700) is larger than or equal to the width of the first hollow-out area (200) in the direction perpendicular to the axial lead L.

4. The supporting board according to claim 3, further comprising a first adhesive layer (600), wherein the first adhesive layer (600) is disposed on the surface of the first board surface (110) and in the groove (700), the first adhesive layer (600) and the bottom surface of the groove (700) are located in the same plane, and the top surface of the first adhesive layer (600) is a plane.

5. The support plate according to claim 4, wherein the first glue layer (600) is an integral glue layer.

6. The support plate according to claim 5, further comprising an underfill (800), the underfill (800) being disposed in the first bar-shaped slot (210).

7. The supporting plate according to claim 1, wherein the first hollow-out area (200) further comprises a plurality of second blind grooves (240), the length direction of the second blind grooves (240) is parallel to the axis L, and the plurality of first bar-shaped grooves (210) and the plurality of second blind grooves (240) are alternately distributed at intervals along a direction perpendicular to the axis L and a direction parallel to the axis L; the second blind groove (240) is formed in the second plate surface (120), and the depth of the second blind groove (240) is smaller than the thickness of the supporting plate.

8. The support plate according to claim 7, wherein the adjacent two first bar-shaped slots (210) or the adjacent two second blind slots (240) are offset in length by a distance such that one end of one of the first bar-shaped slots (210) is located in a central region of one of the second blind slots (240).

9. The support plate according to claim 7 or 8, wherein the first strip-shaped groove (210) and the second blind groove (240) have the same projection shape in the thickness direction of the support plate.

10. The support plate according to claim 1, wherein the second strip-shaped groove (310) has an equal width structure, and both ends of the second strip-shaped groove (310) have a rounded corner structure.

11. A support panel, comprising a first panel (110) and a second panel (120);

the first board surface (110) and the second board surface (120) are arranged back to back, and the first board surface (110) is used for being attached to a display panel;

the supporting plate comprises a bending area (31), and the supporting plate is used for bending along a preset axial lead L in the bending area (31); the support plate is provided with a first hollow-out area (200) and a second transition area (400) in the bending area (31), and the first hollow-out area (200) and the second transition area (400) are adjacently arranged along the direction perpendicular to the axial lead L;

the first hollowed-out area (200) comprises a plurality of first bar-shaped grooves (210), and the first bar-shaped grooves (210) penetrate from the first board surface (110) to the second board surface (120); the length direction of the first bar-shaped groove (210) is parallel to the axis L, and a plurality of the first bar-shaped grooves (210) are distributed in a certain interval array along the direction vertical to the axis L;

the second transition zone (400) comprises a plurality of transition blind grooves (410), the depth of each transition blind groove (410) is smaller than the thickness of the support plate, the length direction of each transition blind groove (410) is parallel to the axial line L, and the transition blind grooves (410) continuously extend from one side end face of the support plate to the other side end face along the axial line L direction; the depth of the transition blind groove (410) is gradually reduced along the direction far away from the first hollow-out area (200).

12. A display module, comprising:

a cover plate, a display screen panel and a support plate according to any one of claims 1-11;

the display panel is attached to the first plate surface (110) of the supporting plate through optical cement;

the cover plate is attached to one surface, back to the support plate, of the display screen panel through optical cement.

13. An electronic device comprising one or more display screens, wherein at least one display screen comprises the display module of claim 12.

Images