CN111245979B

CN111245979B - Foldable device and display area determination method

Info

Publication number: CN111245979B
Application number: CN201811446457.XA
Authority: CN
Inventors: 李松; 李言勇; 马浚原
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2018-11-29
Filing date: 2018-11-29
Publication date: 2021-04-06
Anticipated expiration: 2038-11-29
Also published as: CN111245979A

Abstract

The disclosure relates to a foldable device and a display area determining method, and belongs to the technical field of electronics. The foldable device comprises: the flexible display screen comprises a shell and a flexible display screen, wherein the shell comprises a first frame, a second frame and a rear shell; the first frame comprises a first edge part and a first shielding part, and the first edge part and the first shielding part are connected to form a bending structure; the second frame comprises a second edge part and a second shielding part, and the second edge part and the second shielding part are connected to form a bent structure; the first end of the flexible display screen is positioned on the inner side of the first edge part and the inner side of the rear shell, and the first shielding part is positioned above the first end and used for shielding a gap between the first end and the first edge part; the second end of the flexible display screen is located on the inner side of the second edge portion and the inner side of the rear shell, and the second shielding portion is located above the second end and used for shielding a gap between the second end and the second edge portion, so that the appearance of the foldable equipment is not affected by the gap.

Description

Foldable device and display area determination method

Technical Field

The present disclosure relates to the field of electronic technologies, and in particular, to a foldable device and a display area determination method.

Background

With the rapid development of electronic technology and the rise of diversified devices, a foldable device is proposed at present. The foldable equipment can reduce the space occupied by the equipment when being in a folded state, can provide a larger screen using area for a user when being in an unfolded state, and improves the watching effect of the user.

Foldable equipment disposes folding shell and flexible display screen, and the shell both ends are provided with the frame respectively, and the position of fixed flexible display screen through the frame at both ends makes flexible display screen set up in the inboard of shell, can realize folding or the effect of expanding along with the removal of shell.

In the above related art, displacement may occur during the process of folding the flexible display screen, which may cause the distance between the flexible display screen and the frame to be increased, and a gap may occur, which may affect the appearance of the foldable device.

Disclosure of Invention

The present disclosure provides a foldable device and a method for determining a display area, which can overcome the problems in the related art, and the technical solution is as follows:

in a first aspect, there is provided a foldable device comprising: the display device comprises a shell and a flexible display screen, wherein the shell comprises a first frame, a second frame and a rear shell;

the first frame comprises a first edge part and a first shielding part, the first edge part is connected with the first shielding part to form a bending structure, and the first edge part is connected with the rear shell to form a bending structure;

the second frame comprises a second edge part and a second shielding part, the second edge part and the second shielding part are connected to form a bent structure, and the second edge part and the rear shell are connected to form a bent structure;

the first end of the flexible display screen is positioned on the inner side of the first edge part and the inner side of the rear shell, and the first shielding part is positioned above the first end and used for shielding a gap between the first end and the first edge part;

the second end of the flexible display screen is located on the inner side of the second edge portion and the inner side of the rear shell, and the second shielding portion is located above the second end and used for shielding a gap between the second end and the second edge portion.

In one possible implementation manner, the flexible display screen comprises a flexible cover plate and a display module; the display module is used for controlling the flexible cover plate to display;

the display module is positioned in an inner cavity formed by the first frame, the second frame and the rear shell;

the flexible cover plate is located above the display module, the first end of the flexible cover plate is located on the inner side of the first edge portion, and the second end of the flexible cover plate is located on the inner side of the second edge portion.

In another possible implementation manner, the rear housing includes a first housing, a second housing, and a rotating shaft, the rotating shaft is respectively connected to the first housing and the second housing, and the first housing and the second housing are rotatable around the rotating shaft.

In another possible implementation manner, the width of the first shielding portion is not less than a first predetermined width, and the first predetermined width is a width of a gap between the first end and the first edge when the lower surface of the first housing and the lower surface of the second housing are in contact.

In another possible implementation manner, the width of the second shielding portion is not less than a second predetermined width, which is a width of a gap between the second end and the second edge portion when the lower surface of the first housing and the lower surface of the second housing are in contact.

In another possible implementation manner, the width of the first shielding portion is equal to the width of the second shielding portion.

In another possible implementation manner, the flexible display screen comprises a first non-display area, a display area and a second non-display area, wherein the display area is positioned between the first non-display area and the second non-display area;

the first shielding part is positioned above the first non-display area;

the second shielding portion is located above the second non-display area.

In another possible implementation manner, the width of the first non-display area is equal to the width of the first shielding portion.

In another possible implementation manner, the rear shell includes a first shell, a second shell, and a rotating shaft, the rotating shaft is respectively connected with the first shell and the second shell, and the first shell and the second shell are rotatable around the rotating shaft;

the width of the first non-display area matches an angle between the first housing and the second housing.

In another possible implementation manner, the width of the second non-display area is equal to the width of the second shielding portion.

the width of the second non-display area matches an angle between the first housing and the second housing.

In another possible implementation manner, a transition area between the upper surface and the side surface of the first edge portion is an arc-shaped surface, and a transition area between the upper surface and the side surface of the second edge portion is an arc-shaped surface.

In a second aspect, there is provided a display area determining method applied to the foldable device in the first aspect, the method including:

detecting an angle between the first housing and the second housing;

acquiring the width corresponding to the angle according to a preset corresponding relation, wherein the preset corresponding relation comprises the corresponding relation between the angle between the first shell and the second shell and the width of a non-display area on the flexible display screen;

determining edge areas corresponding to the widths of the two ends of the flexible display screen as the first non-display area and the second non-display area respectively;

determining an area between the first non-display area and the second non-display area as a display area.

In one possible implementation manner, an angle between the first casing and the second casing is in positive correlation with a width of a non-display area on the flexible display screen.

The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:

the foldable device provided by the embodiment of the disclosure comprises a shell and a flexible display screen, wherein the shell comprises a first frame, a second frame and a rear shell, the first frame comprises a first edge part and a first shielding part, and the second frame comprises a second edge part and a second shielding part. The gap that produces between the first end that can shelter from flexible display screen through first occlusion part and the first frame can shelter from the gap that produces between the second end that can shelter from flexible display screen through the second occlusion part and the second frame, has guaranteed that the outward appearance of collapsible equipment does not receive the influence in gap.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a schematic diagram illustrating the construction of a foldable device according to an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating the construction of a foldable device according to an exemplary embodiment;

FIG. 3 is a schematic diagram illustrating the structure of a flexible display screen according to an exemplary embodiment;

FIG. 4 is a schematic structural diagram illustrating a rear housing in accordance with an exemplary embodiment;

FIG. 5 is a schematic structural diagram illustrating a foldable device in a folded state according to an exemplary embodiment;

FIG. 6 is a schematic illustration of a region of a flexible display screen shown in accordance with an exemplary embodiment;

fig. 7 is a flowchart illustrating a display area determination method according to an example embodiment.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

Fig. 1 is a schematic structural view illustrating a foldable device according to an exemplary embodiment, and fig. 2 is a schematic structural view illustrating a foldable device according to an exemplary embodiment. The foldable device can be a mobile phone, a tablet computer and the like.

Referring to fig. 1 and 2, the foldable device includes: the display device comprises a housing 1 and a flexible display screen 2, wherein the housing 1 comprises a first frame 101, a second frame 102 and a rear shell 103, and the rear shell 103 is positioned between the first frame 101 and the second frame 102.

The flexible display screen 2 is located inside the housing 1, i.e. inside the first frame 101, the second frame 102 and the back shell 103, between the first frame 101 and the second frame 102. The flexible display screen 2 is made of a soft material and is a bendable, foldable member. The flexible display screen 2 may be made of glass, acrylic, transparent plastic composite, PMMA (polymethyl methacrylate), PC (Polycarbonate), or the like.

In the disclosed embodiment, the states of the foldable device include an unfolded state and a folded state. In the unfolded state, the flexible display screen 2 and the rear case 103 are unfolded, and the first bezel 101 and the second bezel 102 are located on both sides of the foldable device. In the folded state, the flexible display screen 2 and the rear housing 103 are folded, and the first frame 101 and the second frame 102 are located on the same side of the foldable device.

Foldable equipment is by the in-process that the expansion state switched into fold condition, and flexible display screen 2 takes place to buckle, can lead to the upper surface of flexible display screen 2 to be stretched, takes place deformation, and then produces the gap between the first end that leads to flexible display screen 2 and first frame 101, produces the gap between the second end of flexible display screen 2 and the second frame 102, influences foldable equipment's outward appearance.

In order to solve the above problem, the first frame 101 includes a first edge 1011 and a first shielding portion 1012, the first edge 1011 is connected to the first shielding portion 1012 to form a bent structure, and the first edge 1011 is connected to the rear housing 103 to form a bent structure, so that the first edge 1011, the first shielding portion 1012 and the rear housing 103 are connected to form an integrated groove-shaped structure. The first end of the flexible display screen 2 is located inside the first edge 1011 and inside the rear housing 103, the first shielding part 1012 is located above the first end of the flexible display screen 2, and the first shielding part 1012 can shield a gap between the first end of the flexible display screen 2 and the first edge 1011.

In addition, the second frame 102 includes a second edge portion 1021 and a second shielding portion 1022, the second edge portion 1021 and the second shielding portion 1022 are connected to form a bent structure, and the second edge portion 1021 and the rear housing 103 are connected to form a bent structure, so that the second edge portion 1021, the second shielding portion 1022 and the rear housing 103 are connected to form an integrated groove-shaped structure. The second end of the flexible display screen 2 is located inside the second edge portion 1021 and inside the rear housing 103, the second shielding portion 1022 is located above the second end of the flexible display screen 2, and the second shielding portion 1022 can shield a gap between the second end of the flexible display screen 2 and the second edge portion 1021.

In one possible implementation, the transition area between the upper surface and the side surface of the first edge portion is an arc-shaped surface, and the transition area between the upper surface and the side surface of the second edge portion is an arc-shaped surface, thereby ensuring that the foldable device is more attractive.

In one possible implementation, fig. 3 is a schematic structural diagram illustrating a flexible display screen according to an exemplary embodiment. Referring to fig. 3, the flexible display screen 2 includes a flexible cover 21 and a display module 22, and the display module 22 is used for controlling the flexible cover 21 to display.

The display module 22 is located in an inner cavity formed by the first frame 101, the second frame 102 and the rear shell 103, so that the space in the inner cavity can be fully utilized, and the utilization rate of the space is improved.

The flexible cover plate 21 is located above the display module 22, the first end of the flexible cover plate 21 is located on the inner side of the first edge portion 1011, and the second end of the flexible cover plate 21 is located on the inner side of the second edge portion 1021, so that the flexible cover plate 21 is ensured to be placed in a groove formed by connecting the first frame 101, the second frame 102 and the rear shell 103, and the flexible cover plate 21 is ensured to be supported and displayed.

Accordingly, the first end of the flexible display screen 2 in the above embodiment is the first end of the flexible cover 21, and the second end of the flexible display screen 2 in the above embodiment is the second end of the flexible cover 21.

The flexible cover plate 21 is made of a soft material, and the flexible cover plate 21 can be a glass cover plate, an acrylic cover plate, a transparent plastic composite material, a PMMA material, a PC material and the like, and is a bendable and foldable component.

In one possible implementation, fig. 4 is a schematic structural diagram of a rear housing shown according to an exemplary embodiment. Referring to fig. 4, the rear case 103 includes a first housing 1031, a second housing 1032, and a rotation shaft 1033, the rotation shaft 1033 being connected to the first housing 1031 and the second housing 1032, respectively, and the first housing 1031 and the second housing 1032 being rotatable about the rotation shaft 1033.

Here, the sizes of the first housing 1031 and the second housing 1032 may be arbitrarily set, for example, the sizes of the first housing 1031 and the second housing 1032 may be the same.

It should be noted that the size of each component on the foldable device includes a length, a width, and a height, and the foldable device is placed in a direction perpendicular to a horizontal plane in a fully unfolded state, for example, in a case where a user holds the foldable device, the length refers to a length in a vertical direction, the width refers to a length in a direction parallel to the flexible display screen 2 in the horizontal plane, and the height refers to a length in a direction perpendicular to the flexible display screen 2 in the horizontal plane.

The first and

second housings

1031 and 1032 are rotatable about the rotation shafts 1033, respectively, and the foldable device is in a fully unfolded state when the first and

second housings

1031 and 1032 rotate to the same horizontal plane, and in a fully folded state when the lower surface of the first housing 1031 is in contact with the lower surface of the second housing 1032. By controlling the first housing 1031 or the second housing 1032 to rotate about the rotation shaft 1033, the state of the foldable device can be switched.

When the first housing 1031 and the second housing 1032 rotate about the rotation shaft 1033, the rotation angle and the rotation speed can be arbitrarily set. For example, the first housing 1031 and the second housing 1032 rotate synchronously about the rotation shaft 1033 at the same rotation angle and the same rotation speed.

In order to solve the above problem, on the basis of the above embodiment, the width of the first shielding portion 1012 is set to be not smaller than the first predetermined width.

FIG. 5 is a schematic diagram illustrating a foldable device in a folded state according to an exemplary embodiment. Referring to fig. 5, the first predetermined width is a width of a gap between the first end of the flexible display screen 2 and the first edge 1011 when the lower surface of the first housing 1031 contacts the lower surface of the second housing 1032, and when the foldable device is in the fully folded state, the gap between the first end of the flexible display screen 2 and the first edge 1011 reaches a maximum, and the first predetermined width is a maximum gap width that can be generated. Therefore, as long as the width of the first shielding portion 1012 is not less than the first predetermined width, it can be ensured that the first shielding portion 1012 can completely shield the gap between the first end of the flexible display screen 2 and the first edge portion 1011 no matter what state the foldable device is.

The second predetermined width is a width of a gap between the second end of the flexible display screen 2 and the second edge portion 1021 when the lower surface of the first housing 1031 contacts the lower surface of the second housing 1032, and when the foldable device is in a fully folded state, the gap between the second end of the flexible display screen 2 and the second edge portion 1021 is maximized, and the second predetermined width is a maximum gap width that can be generated. Therefore, as long as the width of the second blocking portion 1022 is not less than the second predetermined width, it can be ensured that the second blocking portion 1022 can completely block the gap between the second end of the flexible display screen 2 and the second edge portion 1021 no matter what state the foldable device is.

In another possible implementation manner, the width of the first shielding portion 1012 and the width of the second shielding portion 1022 are equal, so as to ensure that the first shielding portion 1012 at the first end of the flexible display screen 2 is symmetrical to the second shielding portion 1022 at the second end, thereby ensuring the symmetry and the aesthetic property of the foldable device.

In another possible implementation manner, the length of the first shielding portion 1012 and the length of the second shielding portion 1022 are not less than the length of the flexible display screen 2, so that the gaps at the two ends of the flexible display screen 2 can be completely shielded. And, the length of the first blocking portion 1012 is equal to that of the second blocking portion 1022, so as to ensure symmetry and beauty of the foldable device.

For example, the length of the housing 1 is greater than the length of the flexible display screen 2, and the length of the first blocking portion 1012 and the length of the second blocking portion 1022 may be equal to the length of the housing 1, so as to ensure the consistency of the outer appearance of the foldable device.

In another possible implementation, the height of the groove below the first shielding part 1012 is not less than the height of the flexible display screen 2, so that the groove can accommodate the first end of the flexible display screen 2 therein. The height of the groove below the second blocking portion 1022 is not less than the height of the flexible display screen 2, so that the second end of the flexible display screen 2 can be accommodated in the groove.

In one possible implementation, FIG. 6 is a schematic illustration of a region of a flexible display screen shown in accordance with an example embodiment. Referring to fig. 6, the flexible display screen 2 includes a first non-display area 201, a display area 202, and a second non-display area 203, the display area 202 is located between the first non-display area 201 and the second non-display area 203, a first blocking portion 1012 is located above the first non-display area 201, and a second blocking portion 1022 is located above the second non-display area 203.

Wherein the first non-display area 201 and the second non-display area 203 in the flexible display screen 2 are no longer displayed, and the display area 202 of the flexible display screen 2 can be used for displaying.

In another possible implementation manner, the first shielding portion 1012 and the first non-display area 201 have the same width, and the second shielding portion 1022 has the same width as the second non-display area 203, so that it can be ensured that the first shielding portion 1012 and the second shielding portion 1022 can shield the non-display area, and do not shield the display area, thereby ensuring the display effect of the foldable device.

In another possible implementation manner, the rear case 103 of the foldable device includes a first housing 1031, a second housing 1032, and a rotation shaft 1033, the rotation shaft 1033 is connected to the first housing 1031 and the second housing 1032, respectively, the first housing 1031 and the second housing 1032 are rotatable around the rotation shaft 1033, and the width of the first non-display area 201 and the width of the second non-display area 203 are matched with the angle between the first housing 1031 and the second housing 1032.

The flexible display screen 2 is located inside the rear housing 103, and when the first housing 1031 and the second housing 1032 rotate around the rotating shaft 1033, the lower surface of the flexible display screen 2 moves along with the movement of the rear housing 103, and the upper surface deforms, so that the two ends of the flexible display screen 2 become trapezoidal shapes, and a gap is generated between the flexible display screen and the first frame 101 and the second frame 102, so that the areas of the areas, which are blocked by the two ends of the flexible display screen 2, change. And under different folding angles, the areas of the two shielded areas of the flexible display screen 2 are different.

Therefore, in order to improve screen utilization efficiency, a width matching the angle between the first housing 1031 and the second housing 1032 may be determined as a width of the first non-display region 201 and a width of the second non-display region 203 according to the angle, thereby determining the first non-display region 201 and the second non-display region 203, and a region between the first non-display region 201 and the second non-display region 203 may be taken as the display region 202.

Then, when the state of the foldable device changes again, the width matching the angle is still determined according to the angle between the first housing 1031 and the second housing 1032, and the widths of the first non-display region 201, the display region 202 and the second non-display region 203 are adjusted, so that the dynamic adjustment of the width of the display region is realized, the utilization rate of the flexible display screen 2 can be improved as much as possible, and the screen usable area is increased.

Fig. 7 is a flowchart illustrating a display area determination method according to an example embodiment. Applied to the embodiment shown in fig. 6, as shown in fig. 7, the method includes the following steps:

in step 701, an angle between a first housing and a second housing is detected.

In one possible implementation, the first housing and the second housing rotate around the rotation shaft, the rotation angle of the rotation shaft has a corresponding relationship with an angle between the first housing and the second housing, and the angle between the first housing and the second housing can be determined according to the rotation angle of the rotation shaft, so that the following steps can be performed according to the angle between the first housing and the second housing.

In step 702, the width corresponding to the angle is obtained according to the preset corresponding relationship.

In the folding process of the foldable device, the angle between the first shell and the second shell changes, the width of a gap between the flexible display screen and the frame changes correspondingly, and the width of a shielded area of the flexible display screen also changes correspondingly. Therefore, the angle between the first shell and the second shell corresponds to the width of the shielded area of the flexible display screen.

The shielded area of the flexible display screen is used as a non-display area, and the unshielded area is used as a display area, so that the screen utilization rate can be improved as much as possible. In order to achieve the above effect, a preset corresponding relationship may be established, where the preset corresponding relationship includes a corresponding relationship between an angle between the first casing and the second casing and a width of a region where the flexible display screen is shielded, as a corresponding relationship between the angle between the first casing and the second casing and a width of a non-display region on the flexible display screen.

The width corresponding to the angle between the first shell and the second shell can be obtained according to the preset corresponding relation when the foldable device is in any state.

In one possible implementation manner, the angle between the first casing and the second casing is in positive correlation with the width of the non-display area on the flexible display screen. That is, the larger the angle between the first housing and the second housing, the larger the width of the non-display area.

The larger the angle between the first shell and the second shell is, the smaller the distance between the flexible display screen and the frame is, and the larger the width of the shielded area is, so that the width of the non-display area on the flexible display screen is set to be a larger value, and the situation that the display area is shielded is avoided. And when the angle between the first shell and the second shell is smaller, the larger the distance between the flexible display screen and the frame is, the larger the width of the shielded area is, so that the width of the non-display area of the flexible display screen is set to be a larger value, and the condition that the display area is shielded is avoided.

In step 703, edge regions corresponding to the width at two ends of the flexible display screen are respectively determined as a first non-display region and a second non-display region.

In step 704, an area between the first non-display area and the second non-display area is determined as a display area.

After the width of the non-display area is determined, edge areas corresponding to the width are respectively determined at two ends of the flexible display screen, the two edge areas are respectively determined as a first non-display area and a second non-display area, and the remaining areas except the first non-display area and the second non-display area are determined as display areas. Subsequently, the display can be performed through the display area, and the first non-display area and the second non-display area are not displayed any more or are only displayed in black.

The method provided by the embodiment of the disclosure includes detecting an angle between a first shell and a second shell, obtaining a width corresponding to the angle according to a preset corresponding relationship including a corresponding relationship between the angle between the first shell and the second shell and a width of a non-display area on a flexible display screen, determining edge areas corresponding to the widths of two ends of the flexible display screen as a first non-display area and a second non-display area respectively, and determining an area between the first non-display area and the second non-display area as a display area, thereby realizing dynamic adjustment of the width of the display area, improving the utilization rate of the flexible display screen as much as possible, and increasing the use area of the screen.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A foldable device, characterized in that the foldable device comprises: the display device comprises a shell and a flexible display screen, wherein the shell comprises a first frame, a second frame and a rear shell;

the second end of the flexible display screen is positioned on the inner side of the second edge part and the inner side of the rear shell, and the second shielding part is positioned above the second end and used for shielding a gap between the second end and the second edge part;

the rear shell comprises a first shell, a second shell and a rotating shaft, the rotating shaft is respectively connected with the first shell and the second shell, and the first shell and the second shell can rotate around the rotating shaft;

the flexible display screen comprises a first non-display area, a display area and a second non-display area, wherein the display area is positioned between the first non-display area and the second non-display area;

the width of the first non-display area is matched with the angle between the first shell and the second shell;

2. The foldable device of claim 1, wherein the flexible display screen comprises a flexible cover sheet and a display module; the display module is used for controlling the flexible cover plate to display;

3. The foldable device according to claim 1, wherein a width of the first shade is not less than a first predetermined width, which is a width of a gap between the first end and the first edge when the lower surface of the first housing and the lower surface of the second housing are in contact.

4. The foldable device according to claim 1, wherein the width of the second shade is not less than a second predetermined width, which is a width of a gap between the second end and the second edge portion when the lower surface of the first housing and the lower surface of the second housing are in contact.

5. The foldable device of claim 1, wherein the width of the first shade is equal to the width of the second shade.

6. The foldable device of claim 1, wherein the first shade is located over the first non-display area;

the second shielding portion is located above the second non-display area.

7. The foldable device according to claim 6, wherein the width of the first non-display area is equal to the width of the first shade.

8. The foldable device according to claim 6, wherein the width of the second non-display area is equal to the width of the second shade.

9. The foldable device of claim 1, wherein a transition area between the upper surface and the side surface of the first edge portion is an arcuate surface and a transition area between the upper surface and the side surface of the second edge portion is an arcuate surface.

10. A display area determination method, applied to a foldable device according to any one of claims 6-9, the method comprising:

detecting an angle between the first housing and the second housing;

11. The method of claim 10, wherein the angle between the first housing and the second housing is positively correlated to the width of the non-display area on the flexible display screen.