CN114464085B

CN114464085B - Backup pad, display screen and electronic equipment

Info

Publication number: CN114464085B
Application number: CN202110894485.3A
Authority: CN
Inventors: 张玉军; 熊源
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-12-09
Anticipated expiration: 2041-08-05
Also published as: CN114464085A

Abstract

The embodiment of the application provides a supporting plate, a display screen and electronic equipment. 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 comprises a bending area; the bending area is provided with a plurality of strip-shaped holes; the inner wall in bar hole includes first domatic, and first domatic one end is connected with first face, and the other end extends to the direction that is close to the axis C in bar hole and the direction that is close to the second face. The backup pad that this application embodiment provided, first domatic overflow with optical cement and the route of contracting become the gentle slope from the abrupt slope with contracting for optical cement's the route of contracting is more smooth and easy, can resume initial condition very easily, can not produce local accumulation, deformation, consequently adopts the display screen of the backup pad preparation that this application embodiment provided can not appear the die mark after buckling repeatedly.

Description

Backup pad, display screen and electronic equipment

Technical Field

The application relates to the technical field of display screens, in particular to a supporting plate, a display screen and an electronic device.

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 may include a three-layer stack structure including a support plate, a display panel, and a cover plate in sequence from bottom to top. Wherein, the backup pad can include at least one bending zone, and the display screen is used for realizing crooked folding in the bending zone.

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 in the bending zone, and hollow out construction generally includes a plurality of bar holes that distribute to set up in the bending zone of backup pad. The hollow structure provides a larger deformation space for the support plate, reduces the internal stress generated when the support plate is bent, and improves the bending performance of the support plate.

Currently, the display panel and the supporting plate are generally adhered together by Optical Clear Adhesive (OCA). When the display screen takes place to buckle, the optical cement can produce the dislocation along with the deformation of backup pad, and like this, some optical cement of regional around the bar hole can overflow in the bar hole. When the display screen resumes from the bending state, because the domatic angle of the face with the backup pad of bar hole is very big (be the right angle usually), has hindered the back of contracting of optical cement, consequently the unable complete shrink of optical cement that overflows in the bar hole resumes initial condition, leads to optical cement to produce accumulation, deformation in the part, influences the laminating effect of display panel and backup pad, leads to the display screen to appear the die mark in the vision.

Disclosure of Invention

The embodiment of the application provides a supporting plate, a display screen and electronic equipment to solve the problem that the current supporting plate can lead to the display screen to have a die mark.

In a first aspect, an embodiment of the present application provides a support plate, including: a first board surface and a second board 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 supporting plate comprises a bending area, and the supporting plate is used for bending along a preset axial lead L in the bending area; the bending area is provided with a plurality of strip-shaped holes, the length direction of each strip-shaped hole is parallel to the axial lead L, the strip-shaped holes penetrate from the first plate surface to the second plate surface, and the strip-shaped holes are distributed at intervals in an array manner along the direction parallel to the axial lead L and the direction perpendicular to the axial lead L; the inner wall in bar hole includes first domatic, and first domatic one end is connected with first face, and the other end extends to the direction that is close to the axis C in bar hole and the direction that is close to the second face.

The backup pad that this application embodiment provided, through first domatic excessive and the route of contracting with optical cement become the gentle slope from the abrupt slope for optical cement's the route of contracting is more smooth and easy, can resume initial condition very easily, can not produce local accumulation, deformation, consequently adopts the display screen of the backup pad preparation that this application embodiment provided can not appear the die mark after buckling repeatedly.

In one implementation, an included angle between the first slope surface and the first plate surface is smaller than 45 degrees. When the included angle between the first slope surface and the first plate surface is smaller than 45 degrees, the overflow and retraction paths of the optical cement are very gentle, and the optical cement can be easily restored to the initial state.

In an implementation mode, the inner wall of the strip-shaped hole further comprises a second slope surface, one end of the second slope surface is connected with one end, close to the axis C, of the first slope surface, and the other end of the second slope surface extends to the second board surface in the direction far away from the axis C and the direction close to the second board surface. Like this, the inner wall in bar hole also forms the gentle slope at the second face, and the backup pad can not divide the positive and negative when laminating with display panel, and display panel can laminate with first face promptly, also can laminate with the second face.

In an implementation, first domatic one end is connected with first face, and the other end extends to the second face to the direction that is close to axis C and the direction that is close to the second face. Because first domatic extends to the second face from first face always, consequently first domatic distance is longer, and this makes optical cement when taking place the excessive of great distance, also can resume initial condition along first domatic, has improved the anti-moulding performance of display screen.

In an implementation mode, the inner wall of the strip-shaped hole further comprises a first wall surface perpendicular to the first plate surface, one end of the first wall surface is connected with one end, close to the axis C, of the first slope surface, and the other end of the first wall surface is connected with the second plate surface. Therefore, the supporting plate only forms a slope on one side of the first plate surface, so that the process is simpler and is beneficial to quick production.

In one implementation mode, the inner wall of the strip-shaped hole further comprises a second slope surface and a first wall surface; one end of the second slope surface is connected with the second plate surface, and the other end of the second slope surface extends towards the direction close to the axis C and the direction close to the first plate surface; the sum of the height of the first slope surface in the direction vertical to the first board surface and the height of the second slope surface in the direction vertical to the first board surface is smaller than the thickness of the supporting board; first wall perpendicular to first face, first wall one end and the first domatic one end that is close to axis C are connected, and the other end is connected with the domatic one end that is close to axis C of second. Like this, the inner wall in bar hole forms the gentle slope at first face and second face simultaneously to domatic distance is shorter, and consequently it is less consuming time to process domatic, is favorable to rapid production.

In one implementation, the first slope surface and the second slope surface are both planes to reduce the process difficulty.

In one implementation, an included angle between the first slope surface and the first board surface is equal to an included angle between the second slope surface and the second board surface. Like this, the first face and the second face structure of backup pad are the same, and the backup pad can not divide the positive and negative when laminating with display panel, and display panel can laminate with first face promptly, also can laminate with the second face.

In one implementation, the first slope surface and the second slope surface are both cambered surfaces, the first slope surface is tangent to the first plate surface, and the second slope surface is tangent to the second plate surface. Therefore, the first slope surface and the first board surface as well as the second slope surface and the second board surface form smooth transition at junctions, so that the contraction path of the optical cement is smoother, and when the display screen is recovered from a bending state, the optical cement can be easily recovered to an initial state.

In one implementation, the first slope surface is a plane or a curved surface. First domatic and first face form smooth transition at the juncture, make the shrink route of optical cement more smooth and easy, when the display screen recovered from the state of buckling, the optical cement can be recovered to initial condition easily.

In one implementation, the strip-shaped hole comprises a convex triangular area, the convex triangular area is positioned in the central area of the strip-shaped hole, and the width of the strip-shaped hole in the convex triangular area is increased in an arc shape; the convex triangular area is provided with soft filling materials, and the soft filling materials are used for filling and leveling the convex triangular area, so that the width of the strip-shaped holes in the convex triangular area is equal to the width of other areas. Therefore, the strip-shaped holes form smooth transition between the wall surface of the central area and the wall surfaces of other areas, so that the optical cement cannot be accumulated in the convex triangular area, and the display screen cannot be stamped.

In one implementation, the first slope is formed on the soft filling material.

In one implementation, the soft filling material is an optical cement.

In a second aspect, the present application provides a display screen, where the display screen includes: the display panel comprises a cover plate, a display panel and a support plate provided by the first aspect and each implementation mode of the embodiment of the application; 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 panel, which is back to the support plate, through optical cement.

In a third aspect, an embodiment of the present application provides an electronic device, where the electronic device includes one or more display screens, where at least one display screen is the display screen provided in the second aspect of the embodiment of the present application.

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 according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a support plate according to an embodiment of the present application;

FIG. 4 is a schematic diagram illustrating a display panel and a bending region of a supporting plate according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a supporting plate according to an embodiment of the present disclosure;

FIG. 6 is a cross-sectional view of a support plate provided in accordance with an embodiment of the present application;

FIG. 7A is a schematic view of a display screen using a support plate of an embodiment of the present application in a folded state;

FIG. 7B is a schematic view of a display screen employing a support plate of an embodiment of the present application recovering from a bent state;

FIG. 8 is a cross-sectional view of another support plate provided in accordance with an embodiment of the present application;

FIG. 9 is a cross-sectional view of another support plate provided in accordance with an embodiment of the present application;

FIG. 10 is a cross-sectional view of another support plate shown in an embodiment of the present application;

FIG. 11 is a cross-sectional view of another support plate shown in an embodiment of the present application;

FIG. 12 is a cross-sectional view of another support plate shown in an embodiment of the present application;

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

FIG. 14 is a cross-sectional view of another support plate shown in an embodiment of the present application;

FIG. 15 is a schematic diagram illustrating a distribution of stripe holes according to an embodiment of the present disclosure;

FIG. 16A is a schematic view of a convex triangular region of another support plate structure provided in the embodiments of the present application;

FIG. 16B is a cross-sectional view of another support plate in a convex triangular region provided in embodiments of the present application;

fig. 17 is a cross-sectional view of another support plate in a convex triangular region according to an embodiment of the present application.

Illustration of the drawings:

the display panel comprises a body 10, a display screen 11, a support plate 21, a display panel 22, a cover plate 23, a bending area 31, a flat area 32, a strip-shaped hole 33, an inner wall 331, a support plate 100, a first plate 110, a second plate 120, a strip-shaped hole 210, a first slope 211, a second slope 212, a first wall 213, a convex triangular area 214, a soft filling material 215, a display panel 300 and optical glue 400.

Detailed Description

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.

At present, a folding screen device can be divided into an inner folding screen device and an outer folding screen device according to different folding directions of a display screen. 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, the internal folding screen device means that a main body 10 of the electronic device can be folded toward a display screen 11, and the display screen 11 is hidden inside the main body 10 of the electronic device after the main body 10 of the electronic device is folded, thereby forming an effect that the display screen 11 is hidden in a folded state of the main body 10 and appears in an unfolded state of the main body 10; as shown in structure b in fig. 1, the external folding screen device means that the main body 10 of the electronic device can be folded toward the back side of the main body 10, and the display screen 11 surrounds the outside of the main body 10 of the electronic device after the main body 10 of the electronic device is folded, so that the display screen 11 surrounds the main body 10 in the folded state of the main body 10 to form a surrounding screen, and the main body 10 presents a normal straight screen effect in the unfolded state.

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 apparatus may include a three-layer stack structure including a support plate 21, a display 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 stainless steel, TA4 titanium alloy, polyvinyl alcohol (PVA) high modulus fiber, etc., or other materials with certain plasticity and rigidity, and the support plate 21 is used for supporting and maintaining the display screen shape in various opening and closing states of the body. The display panel 22 is a display screen middle layer and can be attached to the support plate 21 by an Optical Clear Adhesive (OCA), and the display panel 22 can be a flexible Organic Light-Emitting Diode (OLED) display panel or other flexible (i.e., bendable) display panels, such as a flexible Micro LED display panel, a Mini LED display 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 screen, and can be attached above the display panel 22 by the optical adhesive OCA, in the electronic device of the non-folding screen, the cover plate 23 is generally made of glass, and in the folding screen device, the cover plate 23 can be made of a transparent film material, such as a transparent polyimide film, or other materials, in view of the bending performance, which is not limited in the embodiment of the present application.

Fig. 3 is a schematic structural diagram of a support plate according to an embodiment of the present application. 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 flat region 32. The bending area 31 corresponds to an area where the display screen is bent, and the flat area 32 corresponds to an area where the display screen is not bent. The number of bending zones 31 determines the number of foldable areas of the display, in which area the display can be folded if the support plate comprises one bending zone 31, and in which area the display can be folded if the support plate comprises two bending zones 31. By way of example, fig. 3 shows a support panel comprising a bending area 31, and flat areas 32 on the left and right sides of the bending area 31 for enabling a left and right folding of the display screen. The number of bending regions 31 of the display screen is not within the scope of the discussion of the embodiments of the present application and therefore will not be described too much.

When the support plate is bent, the bending region 31 thereof may generate internal stress due to deformation, and if the internal stress is too large, the support plate may be damaged. In order to reduce the internal stress generated when the support plate is bent, the support plate may include a hollowed-out structure in the bending region 31. As shown in fig. 3, the hollow structure includes a plurality of strip-shaped holes 33 distributed in the bending region 31 of the support plate, the length direction of the strip-shaped holes 33 is parallel to the bending axis L of the support plate, and the plurality of strip-shaped holes 33 may be distributed at intervals along the direction parallel to the bending axis L and the direction perpendicular to the bending axis L. A certain interval is provided between two adjacent bar-shaped holes 33 in the direction parallel to the axis L and the direction perpendicular to the axis L. 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.

Fig. 4 is a schematic view illustrating a bonding of a display panel and a bending region of a support plate according to an embodiment of the present disclosure. As shown in fig. 4, the display panel is provided with a mylar PET facing the support plate 21, and the support plate 21 and the mylar PET are generally attached together by an optical adhesive OCA. When the display screen is bent, the optical cement OCA between the mylar PET and the bending region of the support plate 21 may be dislocated along the direction a shown in fig. 4 along with the deformation of the support plate 21, so that a part of the optical cement in the area around the bar-shaped hole 33 may overflow into the bar-shaped hole 33. When the display screen recovers from the bending state, because the angle between the inner wall 331 of the strip-shaped hole 33 and the plate surface of the support plate 21 is very large (usually a right angle), a steep slope (90-degree slope) is formed between the inner wall 331 of the strip-shaped hole 33 and the plate surface of the support plate 21, therefore, the optical cement overflowing into the strip-shaped hole 33 cannot be completely contracted and recovered to the initial state, so that the optical cement is locally accumulated and deformed, the laminating effect of the display panel and the support plate 21 is influenced, and the display screen is visually subjected to stamping.

In order to solve the problem that the current supporting plate can lead to the display screen to have a die mark, the embodiment of the application provides a supporting plate.

Fig. 5 is a schematic structural diagram of a support plate according to an embodiment of the present application. As shown in fig. 5, the support plate 100 includes two plate surfaces back-to-back, which for convenience of description will be referred to herein as a first plate surface 110 and a second plate surface 120. The first plate surface 110 is a plate surface of the support plate 100 for bonding to the display panel, and the second plate surface 120 is a plate surface of the support plate 100 facing away from the display panel. 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. In the embodiment of the present application, the bending region 31 may be divided into an inward bending region or an outward bending region according to different bending directions of the support plate 100, where the inward bending region refers to a region of the support plate 100 bent toward the display panel, and the outward bending region refers to a region of the support plate 100 bent away from the display panel.

As further shown in fig. 5, the bending area 31 of the supporting plate 100 is provided with a hollow structure, the hollow structure can be composed of a plurality of strip-shaped holes 210 distributed in the bending area 31, the strip-shaped holes 210 are through holes, the length direction of the strip-shaped holes 210 is parallel to the axial line L, and the plurality of strip-shaped holes 210 can be distributed along the direction parallel to the axial line L and the direction perpendicular to the axial line L at intervals. A certain interval is provided between two adjacent bar-shaped holes 210 in a direction parallel to the axis L and a direction perpendicular to the axis L. The strip-shaped hole 210 penetrates from the first plate surface 110 of the support plate 100 to the second plate surface 120 of the support plate 100, so that the stress generated when the support plate 100 is bent is reduced in a material removing manner, and the bending performance of the support plate 100 is improved.

Fig. 6 is a cross-sectional view of a support plate according to an embodiment of the present application. As shown in fig. 5 and 6, in one implementation, the strip aperture 210 includes a first slope 211. One end of the first slope surface 211 is connected to the first board surface 110, and the other end extends toward the direction of the axis C close to the bar-shaped hole 210 and the direction close to the second board surface 120. Thus, the first slope surface 211 and the first plate surface 110 can form an included angle α smaller than 90 degrees, and the included angle α is preferably smaller than 45 degrees.

In one implementation, the slotted hole 210 further includes a second sloping surface 212. One end of the second slope surface 212 is connected to one end of the first slope surface 211, which is close to the axis C of the strip-shaped hole 210, and the other end extends to the second board surface 120 in the direction away from the axis C of the strip-shaped hole 210 and in the direction close to the second board surface 120. Thus, the first slope surface 211 and the second slope surface 212 can form a conical surface structure, and an included angle β smaller than 90 degrees can be formed between the second slope surface 212 and the second plate surface 120, and the included angle β is preferably smaller than 45 degrees. The included angle α and the included angle β may be the same or different.

In the embodiment of the present application, the strip-shaped hole 210 can be etched on the support plate 100, and therefore, the first slope surface 211 and the second slope surface 212 can be etched in the strip-shaped hole 210 by controlling the etching layout Tape. In some other implementations, the first slope surface 211 and the second slope surface 212 may also be obtained by secondary processing after the etching of the stripe-shaped hole 210 is completed. In the embodiment of the present application, the processing manner of the first slope surface 211 and the second slope surface 212 is not particularly limited.

In one implementation, the first slope surface 211 and the second slope surface 212 are both planar surfaces, and the included angle α is equal to the included angle β, so that the first slope surface 211 and the second slope surface 212 are symmetrical conical surface structures, and the cross-sectional shape of the bar-shaped hole 210 is an hourglass shape with two wide ends and a narrow middle. In this way, the supporting plate has the same structure on the first plate 110 side and the second plate 120 side, and the supporting plate does not have to be divided into front and back sides when being attached to the display panel, that is, the display panel may be attached to the first plate 110 or the second plate 120.

It should be added that, in the embodiment of the present application, the first slope surface 211 is a plane, which means that an included angle α between the first slope surface 211 and the first board surface 110 is always constant at different positions of the first slope surface 211; the second slope surface 212 is a plane surface, which means that an included angle β between the second slope surface 212 and the second plate surface 120 is always constant at different positions of the second slope surface 212.

In this embodiment, the first slope surface 211 and the second slope surface 212 form an inner wall of the strip-shaped hole 210, the first slope surface 211 may be regarded as a chamfer formed between the inner wall of the strip-shaped hole 210 and the first board surface 110, and the second slope surface 212 may be regarded as a chamfer formed between the inner wall of the strip-shaped hole 210 and the second board surface 120. The first slope surface 211 and the second slope surface 212 are continuously distributed around the strip-shaped hole 210.

Fig. 7A is a schematic view of a display screen in a bent state using a support plate according to an embodiment of the present application. Fig. 7B is a schematic view of the display screen using the support plate of the embodiment of the present application recovering from the bent state. As shown in fig. 7A, when the display panel is bent, the optical adhesive 400 between the supporting plate 100 and the display panel 300 may move along the direction a in fig. 7A, and the optical adhesive 400 in the area around the stripe-shaped hole 210 may overflow into the stripe-shaped hole 210 along the first plate surface 110. As shown in fig. 7B, when the display screen is recovered from the bending state, the optical cement 400 overflowing into the bar-shaped hole 210 can be recovered to the initial state along the contraction of the first slope surface 211, because of the existence of the first slope surface 211, the contraction path of the optical cement 400 is changed from the steep slope to the gentle slope, the slope is reduced, the contraction path is smoother, so that the optical cement 400 can be easily recovered to the initial state, the local accumulation and the deformation cannot be generated, and the mold mark cannot appear after the display screen manufactured by the support plate provided by the embodiment of the application is repeatedly bent.

Fig. 8 is a cross-sectional view of another support plate provided in an embodiment of the present application. The support plate 100 shown in fig. 8 is different from the support plate 100 shown in fig. 6 in that: the first slope surface 211 and the second slope surface 212 are arc surfaces, the first slope surface 211 is tangent to the first board surface 110, and the second slope surface 212 is tangent to the second board surface 120. The first ramp surface 211 and the second ramp surface 212 preferably form a complete semicircular arc.

According to the structure shown in fig. 8, the first slope 211 and the first board surface 110 form a smooth transition at the junction, so that the contraction path of the optical cement is smoother, when the display screen is restored from the bent state, the optical cement can be easily restored to the initial state, and local accumulation and deformation cannot be generated, so that the display screen manufactured by using the support board provided by the embodiment of the application cannot generate die marks after being repeatedly bent.

Fig. 9 is a cross-sectional view of another support plate provided in an embodiment of the present application. As shown in fig. 9, in an implementation manner, the bar-shaped hole 210 only includes the first slope 211, the first slope 211 is a plane, one end of the first slope 211 is connected to the first board surface 110, and the other end of the first slope 211 extends to the second board surface 120 in a direction close to the axis C of the bar-shaped hole 210 and a direction close to the second board surface 120, so that the cross section of the bar-shaped hole 210 is an inverted trapezoid, and at this time, the inner wall of the bar-shaped hole 210 is only formed by the first slope 211. The first slope surface 211 forms an included angle α smaller than 90 degrees with the first plate surface 110, and the included angle α is preferably smaller than 45 degrees.

According to the structure that fig. 9 shows, when the display screen resumes from the state of buckling, the optical cement that overflows in the bar hole 210 can resume initial condition along the shrink of first domatic 211, can not produce local accumulation, deformation, consequently the repeated buckling of display screen can not influence the laminating effect of display panel 300 with backup pad 100, and the display screen can not appear the impression in the vision. Moreover, since the first slope surface 211 extends from the first board surface 110 to the second board surface 120, the distance of the first slope surface 211 in the structure shown in fig. 9 is longer than that of the first slope surface 211 in the structure shown in fig. 6, which enables the optical adhesive to return to the initial state along the first slope surface 211 even when the optical adhesive overflows for a longer distance, thereby improving the anti-stamping performance of the display screen.

Fig. 10 is a cross-sectional view of another support plate shown in an embodiment of the present application. As shown in fig. 10, in an implementation manner, the bar-shaped hole 210 only includes a first slope 211, the first slope 211 is an arc surface, one end of the first slope 211 is connected to the first board surface 110 and tangent to the first board surface 110, and the other end of the first slope 211 extends in a direction close to the axis C of the bar-shaped hole 210 and a direction close to the second board surface 120 and extends to the second board surface 120.

According to the structure shown in fig. 10, when the display screen is recovered from the bent state, the optical cement overflowing into the bar-shaped hole 210 can be recovered to the initial state along the contraction of the first slope surface 211, and the optical cement cannot be locally accumulated and deformed, so that the repeated bending of the display screen cannot affect the attaching effect of the display panel 300 and the support plate 100, and the display screen cannot be visually subjected to stamping. Moreover, since the first slope surface 211 is an arc surface, the first slope surface 211 and the first board surface 110 can form smooth transition at the junction, so that the contraction path of the optical cement is smoother, the optical cement can be more easily recovered to the initial state, and the anti-stamping performance of the display screen is improved.

Fig. 11 is a cross-sectional view of another support plate shown in an embodiment of the present application. As shown in fig. 11, in one implementation, the strip shaped aperture 210 includes a first slope 211 and a first wall 213. The first slope surface 211 and the first wall surface 213 are both planes, one end of the first slope surface 211 is connected to the first plate surface 110, and the other end extends in a direction close to the axis C of the strip-shaped hole 210 and in a direction close to the second plate surface 120; the first wall surface 213 is perpendicular to the first plate surface 110, one end of the first wall surface 213 is connected to the end of the first slope surface 211 close to the axis C, and the other end is connected to the second plate surface 120. Thus, the sectional shape of the strip-shaped hole 210 is funnel-shaped, the inner wall of the strip-shaped hole 210 is formed by the first slope 211 and the first wall surface 213, an included angle α smaller than 90 degrees can be formed between the first slope 211 and the first plate surface 110, and the included angle α is preferably smaller than 45 degrees.

According to the structure that fig. 11 shows, when the display screen resumes from the state of buckling, the optical cement that overflows in the bar hole 210 can resume initial condition along the shrink of first domatic 211, can not produce local accumulation, deformation, consequently the repeated buckling of display screen can not influence the laminating effect of display panel 300 with backup pad 100, and the display screen can not appear the impression in the vision. In addition, compared with the structure shown in fig. 6, the supporting plate 100 shown in fig. 11 has a slope formed only on one side of the first plate surface 110, so the process is simpler and is beneficial to rapid production.

Fig. 12 is a cross-sectional view of another support plate shown in an embodiment of the present application. As shown in fig. 12, in one implementation, the strip-shaped hole 210 includes a first slope 211 and a first wall 213, and an inner wall of the strip-shaped hole 210 is formed by the first slope 211 and the first wall 213. The first slope 211 is an arc surface, the first wall surface 213 is a plane, one end of the first slope 211 is connected to the first plate surface 110, and the other end extends in a direction close to the axis C of the strip-shaped hole 210 and a direction close to the second plate surface 120; the first wall surface 213 is perpendicular to the first plate surface 110, one end of the first wall surface 213 is connected to one end of the first slope surface 211 close to the axis C, and the other end is connected to the second plate surface 120.

According to the structure shown in fig. 12, the first slope 211 and the first board surface 110 can form a smooth transition at the junction, so that the contraction path of the optical cement is smoother, when the display screen is restored from the bent state, the optical cement can be easily restored to the initial state, and local accumulation and deformation cannot be generated, therefore, the repeated bending of the display screen cannot influence the attaching effect of the display panel 300 and the support board 100, and the display screen cannot be visually subjected to die stamping. In addition, compared with the structure shown in fig. 8, the supporting plate 100 shown in fig. 12 has a slope formed only on one side of the first plate surface 110, so the process is simpler and is beneficial to rapid production.

Fig. 13 is a cross-sectional view of another support plate shown in an embodiment of the present application. As shown in fig. 13, in one implementation manner, the strip-shaped hole 210 includes a first slope surface 211, a second slope surface 212, and a first wall surface 213, where the first slope surface 211, the second slope surface 212, and the first wall surface 213 are all planes, and an inner wall of the strip-shaped hole 210 is formed by the first slope surface 211, the second slope surface 212, and the first wall surface 213. One end of the first slope 211 is connected to the first board surface 110, and the other end extends in a direction close to the axis C of the strip-shaped hole 210 and in a direction close to the second board surface 120; one end of the second slope 212 is connected to the second plate surface 120, and the other end extends in a direction close to the axis C of the bar-shaped hole 210 and in a direction close to the first plate surface 110; the sum of the height H1 of the first slope surface 211 in the direction vertical to the first board surface 110 and the height H2 of the second slope surface 212 in the direction vertical to the first board surface 110 is less than the thickness H0 of the support board 100; the first wall surface 213 is perpendicular to the first plate surface 110, one end of the first wall surface 213 is connected to one end of the first slope surface 211 close to the axis C, and the other end is connected to one end of the second slope surface 212 close to the axis C. An included angle α smaller than 90 degrees is formed between the first slope surface 211 and the first board surface 110, an included angle β smaller than 90 degrees is formed between the second slope surface 212 and the second board surface 120, and both the included angle α and the included angle β are preferably smaller than 45 degrees.

According to the structure that fig. 13 shows, when the display screen resumes from the state of buckling, the optical cement that overflows in the bar hole 210 can resume initial condition along the shrink of first domatic 211, can not produce local accumulation, deformation, consequently the repeated buckling of display screen can not influence the laminating effect of display panel 300 with backup pad 100, and the display screen can not appear the impression in the vision. Also, the support plate 100 shown in fig. 13 has a shorter ramp distance compared to the structure shown in fig. 6, so that it takes less time to machine the ramp, which is advantageous for rapid production.

Fig. 14 is a cross-sectional view of another support plate shown in an embodiment of the present application. The support plate 100 shown in fig. 14 is different from the support plate 100 shown in fig. 13 in that the first slope surface 211 and the second slope surface 212 are arc surfaces, the first wall surface 213 is a plane surface, the first slope surface 211 is tangent to the first plate surface 110 and the first wall surface 213, and the second slope surface 212 is tangent to the second plate surface 120 and the first wall surface 213.

According to the structure shown in fig. 14, the first slope 211 and the first board surface 110 can form a smooth transition at the junction, so that the contraction path of the optical cement is smoother, and when the display screen is restored from the bent state, the optical cement can be easily restored to the initial state without local accumulation and deformation, so that the repeated bending of the display screen does not affect the bonding effect between the display panel 300 and the supporting board 100, and the display screen is visually free from impression. Also, the support plate 100 shown in fig. 14 has a shorter ramp distance than the structure shown in fig. 8, so that it takes less time to machine the ramp, which is advantageous for rapid production.

Fig. 15 is a schematic diagram illustrating a distribution manner of the stripe holes 210 according to an embodiment of the present application.

As shown in fig. 15, in one implementation, the plurality of stripe holes 210 may be distributed in an array in the bending region. The distribution of the plurality of stripe holes 210 in the bending region can be regarded as two adjacent stripe holes 210 as a basic array unit, and the basic array unit is obtained by rectangular array along the length direction of the stripe holes 210 and the width direction of the stripe holes 210. For convenience of description, the two stripe holes 210 in the basic array unit are referred to as a stripe hole 210a and a stripe hole 210b, and the sizes of the stripe hole 210a and the stripe hole 210b may be the same or different. The stripe hole 210b is located at one side of the stripe hole 210a along the width direction of the stripe hole 210, and is staggered from the stripe hole 210a by a first distance W1 along the length direction, so that the center of the stripe hole 210a is located at the center of two adjacent stripe holes 210 b. In this way, after the basic array cells are arrayed in a rectangular shape, any two of the stripe holes 210 adjacent in the width direction are arranged in a staggered manner in the longitudinal direction.

Based on the distribution shown in fig. 15, the central area of one stripe hole 210 corresponds to the two end areas of the plurality of stripe holes 210 around the central area. Because a certain interval exists between adjacent bar-shaped holes 210, a non-perforated area with a larger width is formed in the central area of the bar-shaped hole 210 in the support plate 100 due to the existence of the interval, and the non-perforated area increases the internal stress when the support plate 100 is bent, thereby affecting the bending performance of the support plate 100. In order to reduce the width of the non-perforated area and reduce the internal stress, the width of the bar-shaped hole 210 in the central area is increased in an arc shape, and two convex triangular areas 214 outside the whole width range of the bar-shaped hole 210 are formed. Although the width of the non-perforated area is reduced in the triangular convex region 214, the shape of the bar-shaped holes 210 is irregular, so that the optical cement is more easily accumulated in the triangular convex region 214, and the display screen is stamped.

In order to avoid the convex triangular area from generating stamping marks, the embodiment of the application also provides another supporting plate. Fig. 16A is a schematic view of a convex triangular area structure of another support plate provided in the embodiment of the present application. Fig. 16B is a cross-sectional view of another support plate in a convex triangular area according to an embodiment of the present application. As shown in fig. 16A and 16B, the supporting board 100 is provided with a soft filling material 215 in the convex triangular region, and the soft filling material 215 may be, for example, an optical adhesive. The convex triangular area is filled and leveled up by the soft filling material 215, the width of the strip-shaped hole 210 in the convex triangular area is equal to the width of other areas, the shape of the wall surface of the strip-shaped hole 210 in the central area is smoother, and the smooth transition of the wall surface of the strip-shaped hole 210 in the central area and the wall surfaces of other areas is formed, so that the optical cement cannot be accumulated in the convex triangular area, and the die mark cannot appear on the display screen.

Fig. 17 is a cross-sectional view of another support plate in a convex triangular region according to an embodiment of the present application. In one implementation, as shown in fig. 17, when the bar hole 210 of the support plate 100 includes the structure of any implementation of fig. 5 to 14, in a central area of the bar hole 210, the first slope 211 and/or the second slope 212 may be formed on the soft filling material 215, so that a contraction path of the optical cement in the central area of the bar hole 210 changes from a steep slope to a gentle slope, so that the optical cement can be easily restored to an initial state without local accumulation and deformation, and thus repeated bending of the display screen does not affect the attaching effect of the display panel 300 and the support plate 100, and the display screen does not have a mold mark visually.

The embodiment of the application also provides a display screen. The display screen comprises the supporting plate, the display panel and the cover plate, wherein the supporting plate, the display panel and the cover plate are provided by each implementation mode of the embodiment of the application, so that the display screen cannot generate a die mark 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 comprise one or more display screens, wherein at least one display screen is the display screen provided in the embodiments of the present application, or at least one display screen comprises the support plate provided in the first embodiment of the present application. For example, the electronic device may be an inner folding screen device, and the inner folding screen device may include an inner screen and an outer screen, where the inner screen refers to a display screen hidden in a folded state of the body, and the outer screen refers to a display screen exposed in any state of the body, and the inner screen is a display screen provided in an embodiment of the present application.

It is easily understood that, on the basis of the several embodiments provided in the present application, a person skilled in the art may combine, split, recombine, etc. the embodiments of the present application to obtain other embodiments, which do not depart from the scope of the present application.

The above embodiments are provided to explain the purpose, technical solutions and advantages of the present application in further detail, and it should be understood that the above embodiments are merely illustrative of the present application and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present application should be included in the scope of the present application.

Claims

1. A support plate, comprising: a first board surface and a second board 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 a display panel;

the supporting plate comprises a bending area, and the supporting plate is used for bending along a preset axial lead L in the bending area;

the bending area is provided with a plurality of strip-shaped holes, the length direction of the strip-shaped holes is parallel to the axial lead L, the strip-shaped holes penetrate through the first board surface to the second board surface, and the strip-shaped holes are distributed at intervals in an array manner along the direction parallel to the axial lead L and the direction perpendicular to the axial lead L;

the inner wall of the strip-shaped hole comprises a first slope surface, one end of the first slope surface is connected with the first plate surface, and the other end of the first slope surface extends towards the direction close to the axis C of the strip-shaped hole and the direction close to the second plate surface;

the strip-shaped holes comprise convex triangular areas, the convex triangular areas are positioned in the central areas of the strip-shaped holes, and the width of the strip-shaped holes in the convex triangular areas is increased in an arc shape;

the convex triangular area is filled with soft filling materials, so that the width of the central area of the strip-shaped hole after filling is equal to the width of other areas, and the inner wall of the strip-shaped hole forms smooth transition between the central area and other areas.

2. The support plate of claim 1, wherein the angle between the first ramp surface and the first plate surface is less than 45 degrees.

3. The support plate of claim 1, wherein the inner wall of the slot further comprises a second sloped surface, one end of the second sloped surface is connected to the first sloped surface at a position closer to the axis C, and the other end extends to the second plate surface in a direction away from the axis C and in a direction closer to the second plate surface.

4. The support plate of claim 1, wherein the first ramp surface has one end connected to the first plate surface and another end extending toward the second plate surface in a direction toward the axis C and in a direction toward the second plate surface.

5. The support plate of claim 1, wherein the inner wall of the strip aperture further comprises a first wall surface perpendicular to the first plate surface, one end of the first wall surface being connected to the first sloping surface at a position adjacent to the axis C, and the other end being connected to the second plate surface.

6. The support plate of claim 1,

the inner wall of the strip-shaped hole also comprises a second slope surface and a first wall surface;

one end of the second slope surface is connected with the second plate surface, and the other end of the second slope surface extends towards the direction close to the axis C and the direction close to the first plate surface;

the sum of the height of the first slope surface in the direction vertical to the first board surface and the height of the second slope surface in the direction vertical to the first board surface is less than the thickness of the supporting board;

the first wall surface is perpendicular to the first plate surface, one end of the first wall surface is connected with one end, close to the axis C, of the first slope surface, and the other end of the first wall surface is connected with one end, close to the axis C, of the second slope surface.

7. The support plate as in claim 3 or 6, wherein the first and second ramp surfaces are planar.

8. The support plate of claim 7, wherein an angle between the first sloping surface and the first plate surface is equal to an angle between the second sloping surface and the second plate surface.

9. The support plate of claim 3 or 6, wherein the first and second sloping surfaces are curved surfaces, the first sloping surface being tangent to the first deck and the second sloping surface being tangent to the second deck.

10. The support plate of any one of claims 1, 2, 4, and 5, wherein the first sloping surface is planar or curved.

11. The support plate of claim 1, wherein the first ramp is formed on the soft filler material.

12. The support plate according to claim 1 or 11, wherein the soft filler material is an optical glue.

13. A display screen, comprising:

a cover plate, a display panel and the support plate of any one of claims 1-12;

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, back to the support plate, of the display panel through optical cement.

14. An electronic device comprising one or more display screens, wherein at least one display screen is the display screen of claim 13.