CN112259035B

CN112259035B - Display control method, flexible display panel and display device

Info

Publication number: CN112259035B
Application number: CN202011198039.0A
Authority: CN
Inventors: 曾洋
Original assignee: Tianma Microelectronics Co Ltd
Current assignee: Tianma Microelectronics Co Ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2023-11-14
Anticipated expiration: 2040-10-30
Also published as: CN112259035A

Abstract

The invention discloses a display control method, a flexible display panel and a display device. The display control method comprises the following steps: acquiring an actual viewing angle of a user eye relative to each compensation area; acquiring a reference viewing angle of eyes of a user relative to the non-bending display area; and respectively carrying out brightness compensation on the plurality of compensation areas according to the actual viewing angle and the reference viewing angle. According to the display control method, the flexible display panel and the display device, the actual viewing angle of the eyes of the user relative to each compensation area and the reference viewing angle of the eyes of the user relative to the non-bending display area are obtained, and according to the deviation between the reference viewing angle and the actual viewing angle of the eyes of the user relative to each compensation area, the brightness compensation is respectively carried out on the plurality of compensation areas, so that the display brightness difference between each compensation area and the non-bending display area, which is watched by the user, is reduced, and the display uniformity is improved.

Description

Display control method, flexible display panel and display device

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to a display control method, a flexible display panel and a display device.

Background

Flexible display screens have the property of being flexible and foldable, which makes the display device lighter and thinner and portable, and have been widely focused and studied at present.

When the flexible display screen is applied to electronic equipment such as a folding mobile phone, the flexible display screen can be folded along a fixed folding shaft, but after the flexible display screen is restored to a flattened state from a folded state, the flexible display screen can generate unrecoverable deformation due to the influence of stress, the deformation can cause the problem that the display of the flexible display screen is uneven, a user can see obvious folds when watching the flexible display screen, and the display effect of the flexible display screen can be greatly influenced by the existence of the folds.

Disclosure of Invention

The invention provides a display control method, a flexible display panel and a display device, which are used for improving display uniformity and visually weakening or eliminating crease.

In a first aspect, an embodiment of the present invention provides a display control method applied to a flexible display panel, where the flexible display panel includes a display area, the display area includes a bendable display area and a non-bendable display area, and the bendable display area includes a plurality of compensation areas, and the display control method includes:

Acquiring an actual viewing angle of a user eye relative to each compensation area;

acquiring a reference viewing angle of eyes of a user relative to the non-bending display area;

and respectively carrying out brightness compensation on the plurality of compensation areas according to the actual viewing angle and the reference viewing angle.

In a second aspect, an embodiment of the present invention further provides a flexible display panel for performing the display control method according to the first aspect, where the flexible display panel includes a display area, the display area includes a bendable display area and a non-bendable display area, and the bendable display area includes a plurality of compensation areas, and the flexible display panel further includes:

the actual viewing angle acquisition module is used for acquiring the actual viewing angle of the eyes of the user relative to each compensation area;

the reference viewing angle acquisition module is used for acquiring a reference viewing angle of eyes of a user relative to the non-bending display area;

and the brightness compensation module is used for respectively carrying out brightness compensation on the plurality of compensation areas according to the actual viewing angle and the reference viewing angle.

In a third aspect, an embodiment of the present invention further provides a display device, including the flexible display panel according to the second aspect.

According to the display control method provided by the embodiment of the invention, the bendable display area is divided into the plurality of compensation areas, the actual viewing angle of the eyes of the user relative to each compensation area is obtained, the reference viewing angle of the eyes of the user relative to the non-bending display area is obtained, and the brightness compensation is respectively carried out on the plurality of compensation areas according to the deviation between the reference viewing angle and the actual viewing angle of the eyes of the user relative to each compensation area, so that the display brightness difference between each compensation area and the non-bending display area, which is watched by the user, is reduced, the display uniformity is improved, the crease is weakened or eliminated visually, and the influence of the crease on the display effect is avoided.

Drawings

FIG. 1 is a schematic diagram of a conventional flexible display panel;

FIG. 2 is a schematic cross-sectional view of the light-emitting surface of the flexible display panel of FIG. 1 along the direction A-A';

FIG. 3 is a schematic view showing the brightness distribution of the flexible display panel of FIG. 1;

fig. 4 is a schematic flow chart of a display control method according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a flexible display panel according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of FIG. 5 along the direction B-B';

FIG. 7 is a schematic diagram showing the relationship between the actual viewing angle and the brightness according to an embodiment of the present invention;

fig. 8 is a schematic partial structure of a flexible display panel according to an embodiment of the present invention;

FIG. 9 is a schematic cross-sectional view of FIG. 8 along the direction C-C';

FIG. 10 is a schematic diagram of a bendable display area according to an embodiment of the present invention;

FIG. 11 is a schematic view of a partial structure of another flexible display panel according to an embodiment of the present invention;

FIG. 12 is an enlarged schematic view of FIG. 11 at E;

FIG. 13 is a schematic diagram showing the relationship between the actual viewing angle and the color coordinates according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention;

FIG. 16 is a schematic view of a structure of another flexible display panel according to an embodiment of the present invention;

fig. 17 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Detailed Description

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

Fig. 1 is a schematic structural view of a conventional flexible display panel, fig. 2 is a schematic sectional structural view of a light emitting surface of the flexible display panel in a direction A-A' in fig. 1, and fig. 3 is a schematic luminance distribution of the flexible display panel in fig. 1. Referring to fig. 1-3, the flexible display panel includes a display area 10, where the display area 10 includes a bendable display area 101 and a non-bendable display area 102, after the bendable display area 101 is repeatedly folded, the bendable display area 101 may deform irreversibly, resulting in a certain angle of a light emitting surface of the bendable display area 101 relative to the non-bendable display area 102, and when a user observes the bendable display area 101, a difference is generated between a viewing angle of actually observing the bendable display area 101 and a viewing angle of actually observing the non-bendable display area 102, so that discontinuous change of display brightness of the flexible display panel is sensed, and an obvious crease is observed in the bendable display area 101, which affects a display effect of the flexible display panel.

Specifically, as shown in fig. 2 and fig. 3, the included angle between the line of sight direction 11 of the eyes of the user and the normal direction 12 of the non-bending display area 102 at the point a is a, and the normal direction 12 is perpendicular to the plane of the non-bending display area 102; the included angle between the sight line direction 11 of the eyes of the user and the normal line direction 13 of the bendable display area 101 at the point B is B, and the normal line direction 13 is perpendicular to the tangential line direction 14 of the bendable display area 101 at the point B; the included angle between the line of sight 11 of the eyes of the user and the normal direction 15 of the bendable display area 101 at the point C is C, and the normal direction 15 is perpendicular to the tangential direction 16 of the bendable display area 101 at the point C, wherein the included angles a, b and C are not the same, as shown in fig. 2, C < a < b because the bendable display area 101 is deformed in an unrecoverable manner after being repeatedly folded. Fig. 3 shows that when the included angle a is 60 ° and the flexible display panel displays white, the brightness of each position of the flexible display panel observed by the eyes of the user along the line of sight direction 11, wherein the solid line is a measurement value of brightness, the dash-dot line is a calculated value of brightness, the abscissa indicates the position, and the ordinate indicates the brightness, as shown in fig. 3, the brightness of the flexible display panel in the bendable display area 101 changes greatly due to the deformation of the bendable display area 101, the brightness of the point C is greater than the brightness of the point a, and the brightness of the point a is greater than the brightness of the point B, so that the problem of uneven display is generated.

Based on the technical problems described above, an embodiment of the present invention provides a display control method applied to a flexible display panel, where the flexible display panel includes a display area, and the display area includes a bendable display area and a non-bendable display area, and the display control method is characterized in that the display control method includes: acquiring actual viewing angles of eyes of a user relative to different areas in the bendable display area; acquiring a reference viewing angle of eyes of a user relative to a non-bending display area; and respectively carrying out brightness compensation on different areas of the bendable display area according to the actual viewing angle and the reference viewing angle. By adopting the technical scheme, the bendable display area is divided into the plurality of compensation areas, the actual viewing angle of the eyes of the user relative to each compensation area is obtained, the reference viewing angle of the eyes of the user relative to the non-bending display area is obtained, and the brightness compensation is respectively carried out on the plurality of compensation areas according to the deviation between the reference viewing angle and the actual viewing angle of the eyes of the user relative to each compensation area, so that the display brightness difference of each compensation area and the non-bending display area, which are viewed by the user, is reduced, the display uniformity is improved, the folds are weakened or eliminated visually, and the influence of the folds on the display effect is avoided.

The foregoing is the core idea of the present invention, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without making any inventive effort are intended to fall within the scope of the present invention.

Fig. 4 is a schematic flow chart of a display control method according to an embodiment of the present invention, fig. 5 is a schematic structural diagram of a flexible display panel according to an embodiment of the present invention, fig. 6 is a schematic cross-sectional structural diagram of the flexible display panel along the direction B-B' of fig. 5, and as shown in fig. 4-6, the display control method according to an embodiment of the present invention may be applied to a flexible display panel 20, the flexible display panel 20 includes a display area 201, the display area 201 includes a bendable display area 30 and a non-bendable display area 31, the bendable display area 30 includes a plurality of compensation areas, and the display control method includes:

and step 1, acquiring an actual viewing angle of eyes of a user relative to each compensation area.

After the bendable display area 30 is bent for a plurality of times, the stress affects the bendable display area 30, and an unrecoverable deformation is generated, and the deformation makes the eyes 50 of the user have different actual viewing angles with respect to different areas in the bendable display area 30 when the user views the flexible display panel 20, so that the brightness of the different areas in the bendable display area 30 observed by the user is different, and a problem of uneven display is generated. By dividing the bendable display area 30 into a plurality of compensation areas, when the user views the flexible display panel 20, the actual viewing angle of the user's eyes 50 relative to each compensation area is obtained, and then the compensation areas are respectively compensated according to the actual viewing angle of each compensation area, so that the display brightness of each compensation area seen by the user is the same or equivalent, and the improvement of the display uniformity is facilitated.

It should be noted that the number of compensation areas, the area of the compensation areas, and the shape and the position of the compensation areas in the bendable display area 30 may be set according to practical requirements, for example, the shape of the compensation areas is square, rectangular, triangular, hexagonal, etc., which is not limited in the embodiment of the present invention. In general, the greater the number of compensation regions divided by the flexible display region 30, the smaller the area of each compensation region, and the more accurate the brightness compensation for the flexible display region 30, so that the display uniformity of the flexible display panel 20 is better, and the compensation region is exemplarily provided to include one pixel, so that the brightness compensation is accurate to the pixel level, and the display uniformity of the flexible display panel 20 is greatly improved.

And 2, acquiring a reference viewing angle of eyes of a user relative to the non-bending display area.

The display brightness of the bendable display area 30 viewed by the user is different from the display brightness of the non-bendable display area 31 due to the fact that the non-recoverable deformation is generated in the bendable display area 30, the actual viewing angle of the user eye 50 relative to the bendable display area 30 is different from the reference viewing angle of the user eye 50 relative to the bendable display area 30, the brightness of the bendable display area 30 viewed by the user is adjusted to be the same as or equal to the brightness of the non-bendable display area 31 viewed by the user by acquiring the reference viewing angle of the user eye 50 relative to the non-bendable display area 31 as a reference, the display uniformity is improved, and the visual weakening or elimination of creases is facilitated.

And 3, respectively carrying out brightness compensation on the compensation areas according to the actual viewing angle and the reference viewing angle.

Wherein, as mentioned above, the angle of the user watching the flexible display panel 20 affects the display brightness watched by the user, and the reference watching angles of the eyes 50 of the user are substantially consistent with respect to different areas in the non-bending display area 31, so that the display uniformity of the non-bending display area 31 is good; since the bendable display area 30 is deformed, the actual viewing angle of the user eye 50 with respect to the compensation areas is different from the reference viewing angle, so that the display brightness of the bendable display area 30 and the display brightness of the non-bendable display area 31 viewed by the user are different, therefore, according to the reference viewing angle and the deviation between the actual viewing angles of the user eye 50 with respect to each compensation area, the brightness compensation is performed on the compensation areas, and different brightness compensation is performed on the different deviations, so as to reduce the display brightness difference of each compensation area and the non-bendable display area 31 viewed by the user, improve the display uniformity, and facilitate the visual weakening or elimination of creases.

Optionally, acquiring an actual viewing angle of the user's eyes with respect to each of the compensation areas includes:

and 11, obtaining the morphological information of the bendable display area.

And step 12, acquiring the spatial position information of eyes of the user.

And step 13, determining the actual viewing angle of the eyes of the user relative to each compensation area according to the morphological information of the bendable display area and the spatial position information of the eyes of the user.

Specifically, after the bendable display area 30 is bent for multiple times, unrecoverable deformation is generated, so that a difference exists between an actual viewing angle of the user eye 50 relative to each compensation area and a reference viewing angle of the user eye 50 relative to the non-bending display area 31, therefore, by acquiring the morphological information of the bendable display area 30 and the spatial position information of the user eye 50, the actual viewing angle of the user eye 50 relative to each compensation area can be calculated, and according to the actual viewing angle of the user eye 50 relative to each compensation area and the difference of the reference viewing angle of the user eye 50 relative to the non-bending display area 31, brightness compensation is performed on the multiple compensation areas, the display brightness difference between each compensation area and the non-bending display area, which is viewed by the user, is reduced, folds are visually weakened or eliminated, and display uniformity is improved.

For example, as shown in fig. 5, an XYZ space coordinate system may be established, by acquiring the coordinates of the user's eyes 50 in the XYZ space coordinate system, the spatial position information of the user's eyes 50 is obtained, and by acquiring the coordinates of each compensation region in the XYZ space coordinate system, the shape information of the bendable display region is obtained, and the actual viewing angle of the position of the user's eyes 50 for each compensation region may be calculated according to the coordinates of the user's eyes 50 in the XYZ space coordinate system and the coordinates of each compensation region in the XYZ space coordinate system. The XYZ space coordinate system may be replaced by a polar coordinate system or any other coordinate system, which is not limited in the embodiment of the present invention.

Optionally, determining an actual viewing angle of the user eye with respect to each compensation area according to the topographic information of the bendable display area and the spatial position information of the user eye includes:

and 131, determining a first normal direction of each compensation area according to the morphological information of the bendable display area, wherein the first normal direction of the compensation area is perpendicular to a tangent plane of the compensation area.

The tangential plane of the compensation area may be a tangential plane at any point in the compensation area, and those skilled in the art can set the tangential plane according to actual requirements.

As illustrated in fig. 5 and 6, taking the tangential plane of the compensation region as an example at the center point of the compensation region, the bendable display region 30 includes a first compensation region 301 and a second compensation region 302, the first normal direction 42 of the first compensation region 301 is perpendicular to the tangential plane 43 of the first compensation region 301, and the first normal direction 44 of the second compensation region 302 is perpendicular to the tangential plane 45 of the second compensation region 302.

And step 132, obtaining a first sight line direction of the user eyes relative to each compensation area according to the spatial position information of the user eyes, wherein the first sight line direction of the compensation areas is a connecting line direction between the spatial positions of the user eyes and the compensation areas.

The connection line direction between the spatial position of the user's eye and the compensation area may be a connection line direction between the spatial position of the user's eye and any point in the compensation area, and those skilled in the art may set the connection line direction according to actual requirements.

As shown in fig. 5 and 6, taking a line direction between the spatial position of the user's eye and the compensation area as an example, the bendable display area 30 includes a first compensation area 301 and a second compensation area 302, the first line-of-sight direction 46 of the first compensation area 301 is a line direction between the spatial position of the user's eye and the center point of the first compensation area 301, and the first line-of-sight direction 47 of the second compensation area 302 is a line direction between the spatial position of the user's eye and the center point of the second compensation area 302.

Step 133, determining an actual viewing angle of the eyes of the user relative to the compensation area according to the first normal direction and the first line-of-sight direction of the compensation area, wherein the actual viewing angle is an included angle between the first normal direction and the first line-of-sight direction in the compensation area.

And calculating an included angle between the first normal direction and the first sight direction of the compensation area to obtain an actual viewing angle of eyes of the user relative to the compensation area.

Illustratively, as shown in fig. 5 and 6, the angle between the first line-of-sight direction 46 and the first normal direction 42 of the first compensation region 301 is calculated to obtain the actual viewing angle θ2, and the angle between the first line-of-sight direction 47 and the first normal direction 44 of the second compensation region 302 is calculated to obtain the actual viewing angle θ3.

Fig. 7 is a schematic diagram of a relationship between an actual viewing angle and brightness, as shown in fig. 7, where an abscissa represents an actual viewing angle, and an ordinate represents brightness, and the actual viewing angle is different, and the observed brightness is different. As illustrated in fig. 5 and 6, since the bendable display area 30 is irreversibly deformed after being bent a plurality of times, the actual viewing angle θ2 is different from the actual viewing angle θ3, and thus, when the user views the flexible display panel 20, the brightness of the first compensation area 301 and the second compensation area 302 viewed by the user is different, and the brightness compensation is performed on the first compensation area 301 and the second compensation area 302 according to the deviation between the actual viewing angle θ2 of the first compensation area 301 and the actual viewing angle θ3 of the second compensation area 302, so that the brightness difference between the first compensation area 301 and the second compensation area 302 viewed by the user can be reduced, and the display uniformity is improved.

In the foregoing embodiment, optionally, obtaining a reference viewing angle of the eyes of the user with respect to the non-bending display area includes:

and step 21, acquiring the spatial position information of eyes of the user.

Step 22, determining a reference viewing angle of the user eyes relative to the non-bending display area according to the spatial position information of the user eyes.

After the bendable display area 30 is bent for multiple times, an unrecoverable deformation is generated, so that a difference exists between an actual viewing angle of the user eye 50 relative to each compensation area and a reference viewing angle of the user eye 50 relative to the non-bending display area 31, therefore, by acquiring the morphological information of the bendable display area 30 and the spatial position information of the user eye 50, the reference viewing angle of the user eye 50 relative to the non-bending display area 31 can be calculated, and according to the actual viewing angle of the user eye 50 relative to each compensation area and the difference of the reference viewing angle of the user eye 50 relative to the non-bending display area 31, brightness compensation is performed on the multiple compensation areas, the display brightness difference between each compensation area and the non-bending display area, which is viewed by the user, is reduced, folds are visually weakened or eliminated, and display uniformity is improved.

Optionally, determining the reference viewing angle of the user's eyes relative to the non-bending display area according to the spatial position information of the user's eyes includes:

step 221, determining a second normal direction of the non-bending display area, wherein the second normal direction of the non-bending display area is perpendicular to a plane where the non-bending display area is located.

As shown in fig. 5 and 6, the second normal direction 41 of the non-bending display region 31 is perpendicular to the plane of the non-bending display region 31.

Step 222, obtaining a second sight line direction of the user's eyes relative to the non-bending display area according to the spatial position information of the user's eyes, wherein the second sight line direction of the non-bending display area is a connecting line direction between the spatial position of the user's eyes and the non-bending display area.

The connection line direction between the spatial position of the user's eyes and the non-bending display area can be the connection line direction between any point in the non-bending display area and can be set by a person skilled in the art according to actual requirements.

As illustrated in fig. 5 and 6, the direction of the line connecting the spatial position of the user's eye with the non-bending display area 31 is the direction of the line connecting the spatial position of the user's eye with the edge point O of the non-bending display area 31. The edge point O is located at a position of the non-bending display area 31 near the bendable display area 30, so that the brightness-compensated non-bending display area 31 has a visual effect equivalent to that of the non-bending display area 31 adjacent to the non-bending display area 31, and is helpful for eliminating creases. Preferably, the edge point O may be located at the interface between the non-bending display area 31 and the bending display area 30.

Step 223, determining a reference viewing angle of the eyes of the user relative to the non-bending display area according to the second normal direction and the second line-of-sight direction of the non-bending display area, wherein the reference viewing angle is an included angle between the second normal direction and the second line-of-sight direction.

Illustratively, as shown in fig. 5 and 6, calculating the angle between the second line-of-sight direction 40 and the second normal direction 41 results in the reference viewing angle θ1.

Optionally, performing brightness compensation on the plurality of compensation areas according to the actual viewing angle and the reference viewing angle, respectively, including:

comparing the actual viewing angle of the compensation area with the reference viewing angle, and when the actual viewing angle is larger than the reference viewing angle, improving the brightness of the compensation area; when the actual viewing angle is smaller than the reference viewing angle, reducing the brightness of the compensation area; when the actual viewing angle is equal to the reference viewing angle, the brightness of the compensation area is kept unchanged.

Wherein, due to the deformation of the bendable display area 30, the actual viewing angle of each compensation area in the bendable display area 30 is different from the reference viewing angle, so that the brightness of each compensation area in the bendable display area 30 is different from the brightness of the non-bendable display area 31, as shown in fig. 7, the larger the actual viewing angle, the smaller the brightness is.

As illustrated in fig. 6, the foldable display area 30 includes a first compensation area 301 and a second compensation area 302, and the actual viewing angle θ2 of the first compensation area 301 is greater than the reference viewing angle θ1, and the actual viewing angle θ3 of the second compensation area 302 is less than the reference viewing angle θ1, so that the brightness of the first compensation area 301 is less than the brightness of the non-foldable display area 31, and the brightness of the second compensation area 302 is greater than the brightness of the non-foldable display area 31.

Therefore, by comparing the actual viewing angle of each compensation area with the reference viewing angle, brightness compensation is performed for each compensation area, wherein when the actual viewing angle of the compensation area is greater than the reference viewing angle, it is indicated that the brightness of the compensation area viewed by the user is smaller than the brightness of the non-bending display area 31, and at this time, the brightness of the compensation area is improved, so as to reduce the difference between the display brightness of the compensation area and the display brightness of the non-bending display area 31 viewed by the user, and improve the display uniformity. Similarly, when the actual viewing angle is smaller than the reference viewing angle, it is indicated that the brightness of the compensation area viewed by the user is greater than the brightness of the non-bending display area 31, and the brightness of the compensation area is reduced; when the actual viewing angle is equal to the reference viewing angle, it is explained that the brightness of the compensation area viewed by the user is equivalent to the brightness of the non-bending display area 31, while the brightness of the compensation area is kept unchanged. By adopting the display control method provided by the embodiment of the invention, the display brightness difference of each compensation area and the non-bending display area 31, which are observed by a user, can be reduced, crease marks can be reduced or eliminated visually, and the display uniformity can be improved.

Optionally, the plurality of compensation regions includes a first type compensation region and a second type compensation region.

Respectively performing brightness compensation on the plurality of compensation areas according to the actual viewing angle and the reference viewing angle, including:

step 31, determining a first type compensation area and a second type compensation area, wherein the first type compensation area and the user eye are located on the same side of a central axis, the second type compensation area and the user eye are located on different sides of the central axis, the central axis is perpendicular to a first tangential plane and passes through a first intersecting line, the first tangential plane is a tangential plane of the bendable display area at the lowest point, and the first intersecting line is an intersecting line of the first tangential plane and the bendable display area.

The compensation area on the same side of the middle axis surface with the eyes of the user is determined to be a first type compensation area, the compensation area on the different side of the middle axis surface with the eyes of the user is determined to be a second type compensation area, and the first type compensation area and the second type compensation area are respectively compensated, so that the complexity of brightness compensation can be reduced.

Illustratively, referring to fig. 5 and 6, the foldable display region 30 includes a first compensation region 301 and a second compensation region 302, the first compensation region 301 being on the same side of the mid-axis plane 48 as the user's eye, and thus, the first compensation region 301 is determined to be a first type of compensation region; the second compensation zone 302 is located on a different side of the mid-axis plane 48 than the user's eye, and therefore the second compensation zone 302 is determined to be a second type of compensation zone. The central axis 48 is perpendicular to the first tangential plane 49 and passes through the first intersection line 51, and the bendable display area 30 is generally a concave curved surface, as shown in fig. 6, the first tangential plane 49 is a tangential plane of the bendable display area 30 at the lowest point of the concave curved surface, and the first intersection line 51 is an intersection line of the first tangential plane 49 and the bendable display area 30.

Step 32, improving the brightness of the first type compensation area and reducing the brightness of the second type compensation area.

Wherein, since the bendable display area 30 is generally a concave curved surface, the actual viewing angle of the first type compensation area on the same side of the central axis 48 as the eyes of the user is larger than the reference viewing angle, and the brightness of the first type compensation area viewed by the user is smaller than the brightness of the non-bendable display area 31; the actual viewing angle of the second type of compensation region, which is on a different side of the central axis 48 than the user's eyes, is smaller than the reference viewing angle, and the brightness of the first type of compensation region viewed by the user is greater than the brightness of the non-flexed display region 31. When the display control method provided by the embodiment of the invention is used for brightness compensation, the brightness of the first type compensation area is improved, the brightness of the second type compensation area is reduced, the display brightness difference between the non-bending display area 31 and the non-bending display area 31, which is observed by a user, is reduced, the crease is reduced or eliminated visually, and the display uniformity is improved.

Optionally, increasing the brightness of the first type compensation area and decreasing the brightness of the type compensation area includes:

step 321, determining the shortest distance between each first type compensation area and the first intersection line, and determining a first brightness compensation value of each first type compensation area according to the shortest distance.

And step 322, performing brightness compensation on the first type compensation area according to the first brightness compensation value.

Step 323, determining a shortest distance between each second type compensation area and the first intersection line, and determining a second brightness compensation value of each second type compensation area according to the shortest distance.

And step 324, performing brightness compensation on the second type compensation area according to the second brightness compensation value.

Since the bendable display area 30 is generally a concave curved surface, there is a certain relationship between the shortest distance between each compensation area and the first intersection line and the actual viewing angle thereof, so that the brightness of each compensation area can be compensated according to the shortest distance between the compensation area and the first intersection line, so as to reduce the difficulty of brightness compensation.

It should be noted that, the shortest distance between the compensation area and the first intersection line may be the shortest distance between any point in the compensation area and the first intersection line, for example, the shortest distance between the compensation area and the first intersection line is the shortest distance between the central point of the compensation area and the first intersection line, or the shortest distance between the compensation area and the first intersection line is the shortest distance between the side of the compensation area close to or far from the first intersection line and the first intersection line, which can be set by those skilled in the art according to actual needs.

Fig. 8 is a schematic partial structure of a flexible display panel according to an embodiment of the present invention, fig. 9 is a schematic cross-sectional structure of fig. 8 along the direction of C-C', and as shown in fig. 8 and 9, an exemplary flexible display area 30 includes a third compensation area 303, a fourth compensation area 304, a fifth compensation area 305 and a sixth compensation area 306, the third compensation area 303 and the fourth compensation area 304 are first type compensation areas, and the fifth compensation area 305 and the sixth compensation area 306 are second type compensation areas. Taking the shortest distance between the compensation area and the first intersection line 51 as an example, the shortest distance between the side of the compensation area away from the first intersection line 51 and the first intersection line 51 is d1, the shortest distance between the third compensation area 303 and the first intersection line 51 is d2, the shortest distance between the fourth compensation area 304 and the first intersection line 51 is d3, the shortest distance between the fifth compensation area 305 and the first intersection line 51 is d4, and the shortest distance between the sixth compensation area 306 and the first intersection line 51 is d 1. As shown in fig. 9, since the shortest distance d1 between the third compensation area 303 and the first intersection line 51 and the shortest distance d2 between the fourth compensation area 304 and the first intersection line 51 are different, the bendable display area 30 is generally a concave curved surface, and thus the actual viewing angle θ4 of the third compensation area 303 is different from the actual viewing angle θ5 of the fourth compensation area 304, and the brightness of the third compensation area 303 and the fourth compensation area 304 viewed by the user is different. By performing luminance compensation for the third compensation region 303 and the fourth compensation region 304 respectively according to the shortest distance d1 between the third compensation region 303 and the first intersection 51 and the shortest distance d2 between the fourth compensation region 304 and the first intersection 51, the difference in display luminance between the third compensation region 303 and the fourth compensation region 304 as viewed by the user can be reduced, and display uniformity can be improved. Similarly, by performing luminance compensation for the fifth compensation region 305 and the sixth compensation region 306, respectively, based on the shortest distance d3 between the fifth compensation region 305 and the first intersection 51 and the shortest distance d4 between the sixth compensation region 306 and the first intersection 51, the difference in display luminance between the fifth compensation region 305 and the sixth compensation region 306, as viewed by the user, can be reduced, and display uniformity can be improved.

Optionally, the first type compensation region includes at least a first a region and a first b region, and the second type compensation region includes at least a second a region and a second b region.

Determining a shortest distance between each first type compensation region and the first intersection line, and determining a first brightness compensation value of each first type compensation region according to the shortest distance, wherein the determining comprises the following steps:

step 3211, determining a first shortest distance between the first intersection and the first zone, and determining a second shortest distance between the first second zone and the first intersection.

Step 3212, determining a first brightness compensation value of the first area according to the first shortest distance, and determining a first second brightness compensation value of the first area according to the second shortest distance, wherein the first shortest distance is smaller than the second shortest distance, and the first brightness compensation value is smaller than the first second brightness compensation value.

And performing brightness compensation on the first type compensation area according to the first brightness compensation value, including:

and carrying out brightness compensation on the first area according to the first brightness compensation value, and carrying out brightness compensation on the first area according to the first second brightness compensation value.

Determining the shortest distance between each second type compensation area and the first intersection line, and respectively determining a second brightness compensation value of each second type compensation area according to the shortest distance, wherein the method comprises the following steps:

step 3231, determining a third shortest distance between the second first region and the first intersection, and determining a fourth shortest distance between the second region and the first intersection.

Step 3232, determining a second first brightness compensation value of the second first region according to the third shortest distance, and determining a second brightness compensation value of the second region according to the fourth shortest distance, wherein the third shortest distance is smaller than the fourth shortest distance, and the second first brightness compensation value is smaller than the second brightness compensation value.

And performing brightness compensation on the second type compensation area according to the second brightness compensation value, including:

and carrying out brightness compensation on the second first area according to the second first brightness compensation value, and carrying out brightness compensation on the second area according to the second brightness compensation value.

Wherein, since the bendable display area 30 is generally a concave curved surface, the smaller the shortest distance between the compensation area and the first intersection line, the closer the actual viewing angle is to the reference viewing angle, the closer the visual brightness of the compensation area is to the visual brightness of the non-bendable display area 31; the larger the compensation area having a shortest distance with the first intersection line, the larger the difference between the actual viewing angle and the reference viewing angle, and the larger the difference between the visual brightness and the visual brightness of the non-bending display area 31, so that the brightness compensation of different degrees can be performed on each compensation area according to the shortest distance between the compensation area and the first intersection line, the smaller degree of brightness compensation can be performed on the compensation area having a smaller shortest distance with the first intersection line, and the larger degree of brightness compensation can be performed on the compensation area having a larger shortest distance with the first intersection line, so as to improve the display uniformity.

With continued reference to fig. 8 and 9, the exemplary fourth compensation region 304 is a first b region, the third compensation region 303 is a first a region, the shortest distance d2 between the fourth compensation region 304 and the first intersection 51 is a first shortest distance, the shortest distance d1 between the third compensation region 303 and the first intersection 51 is a second shortest distance, and the shortest distance d2 between the fourth compensation region 304 and the first intersection 51 is smaller than the shortest distance d1 between the third compensation region 303 and the first intersection 51. As shown in fig. 9, the actual viewing angle θ5 of the fourth compensation region 304 and the actual viewing angle θ4 of the third compensation region 303 are both larger than the reference viewing angle θ1, and the actual viewing angle θ5 of the fourth compensation region 304 is smaller than the actual viewing angle θ4 of the third compensation region 303, and thus, the difference between the actual viewing angle θ5 of the fourth compensation region 304 and the reference viewing angle θ1 is smaller than the actual viewing angle θ4 of the third compensation region 303. The first brightness compensation value lifted by the fourth compensation area 304 is determined according to the shortest distance d2 between the fourth compensation area 304 and the first intersection line 51, the first second brightness compensation value lifted by the third compensation area 303 is determined according to the shortest distance d1 between the third compensation area 303 and the first intersection line 51, and the first brightness compensation value is smaller than the first second brightness compensation value, so that the lifted brightness degree of the fourth compensation area 304 is smaller than the lifted brightness degree of the third compensation area 303, the visual brightness of the fourth compensation area 304 and the visual brightness of the third compensation area 303 after brightness compensation are the same as or equal to the visual brightness of the non-bending display area 31, and the display uniformity is further improved.

Similarly, the fifth compensation region 305 is used as the second first region, the sixth compensation region 306 is used as the second region, the shortest distance d3 between the fifth compensation region 305 and the first intersection line 51 is the third shortest distance, the shortest distance d4 between the sixth compensation region 306 and the first intersection line 51 is the fourth shortest distance, and the shortest distance d3 between the fifth compensation region 305 and the first intersection line 51 is smaller than the shortest distance d4 between the sixth compensation region 306 and the first intersection line 51. As shown in fig. 9, the actual viewing angle θ6 of the fifth compensation region 305 and the actual viewing angle θ7 of the sixth compensation region 306 are both smaller than the reference viewing angle θ1, and the actual viewing angle θ6 of the fifth compensation region 305 is larger than the actual viewing angle θ7 of the sixth compensation region 306, and thus, the difference between the actual viewing angle θ6 of the fifth compensation region 305 and the reference viewing angle θ1 is smaller than the actual viewing angle θ7 of the sixth compensation region 306. The reduced second first brightness compensation value of the fifth compensation region 305 is determined according to the shortest distance d3 between the fifth compensation region 305 and the first intersection line 51, the reduced second brightness compensation value of the sixth compensation region 306 is determined according to the shortest distance d4 between the sixth compensation region 306 and the first intersection line 51, and the second first brightness compensation value is smaller than the second brightness compensation value, so that the reduced brightness degree of the fifth compensation region 305 is smaller than the brightness degree of the sixth compensation region 306, and the visual brightness of the fifth compensation region 305 and the sixth compensation region 306 after brightness compensation are the same as or equivalent to the visual brightness of the non-bending display region 31, so that the display uniformity is further improved.

Optionally, obtaining the morphological information of the bendable display area includes:

and 111, bending the flexible display panel for a plurality of times to form a stable appearance in the bendable display area.

And 112, obtaining and storing the morphology information of the bendable display area.

The flexible display panel is bent for multiple times, so that the bendable display area 30 forms a stable shape, and then the shape information of the bendable display area 30 is obtained and stored by using a measuring device, for example, fig. 10 is a schematic diagram of the shape of the bendable display area provided in the embodiment of the present invention, the shape information of the bendable display area 30 obtained by using the measuring device may be shown in fig. 10, and coordinates of each point on the bendable display area 30 may be stored by using an XYZ space coordinate system, so that the shape information is stored by storing coordinate values, and those skilled in the art may also obtain and store the shape information of the bendable display area by other manners.

Because the bendable display area 30 has a stable morphology, no major change occurs any more, so that the stored morphology information can be directly called when brightness compensation is performed later, and measurement is not needed again, thereby being beneficial to improving the efficiency of brightness compensation.

and the shape information of the bendable display area is acquired in real time through a stress sensor, an optical sensor or an electrical sensor.

The method can monitor any deformation of the flexible display panel in the use process of the flexible display panel, so that more accurate brightness compensation can be performed on each compensation area in the flexible display area.

Optionally, before acquiring the actual viewing angle of the eyes of the user with respect to each of the compensation areas, the method further includes:

in step 410, luminance compensation information is preset, where the luminance compensation information includes a correspondence among the actual viewing angle, the reference viewing angle, and a luminance compensation value.

and step 33, determining brightness compensation values corresponding to the actual viewing angle and the reference viewing angle according to the actual viewing angle, the reference viewing angle and the brightness compensation information.

And step 34, respectively performing brightness compensation on the plurality of compensation areas according to the brightness compensation value.

Specifically, the corresponding relation among the actual viewing angle, the reference viewing angle and the brightness compensation value can be calculated and stored in advance, and in the use process of the flexible display panel, the stored brightness compensation values corresponding to the actual viewing angle and the reference viewing angle are only required to be called according to the actual viewing angle and the reference viewing angle of each compensation area, calculation of the brightness compensation value is not required again, and the brightness compensation efficiency is improved.

The brightness compensation information may be stored in a table form or may be stored in a mapping manner, and may be set by a person skilled in the art according to actual needs, which is not limited in the embodiment of the present invention.

Optionally, the compensation area includes at least one first pixel unit, and the first pixel unit includes a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel; the non-bending display area comprises at least one second pixel unit, and the second pixel unit comprises a fourth color sub-pixel, a fifth color sub-pixel and a sixth color sub-pixel; the first color is the same as the fourth color, the second color is the same as the fifth color, and the third color is the same as the sixth color;

The brightness compensation values comprise a first color brightness compensation value, a second color brightness compensation value and a third color brightness compensation value;

respectively performing brightness compensation on the plurality of compensation areas according to the brightness compensation value, including:

and performing brightness compensation on the first color sub-pixel according to the first color brightness compensation value, performing brightness compensation on the second color sub-pixel according to the second color brightness compensation value, performing brightness compensation on the third color sub-pixel according to the third color brightness compensation value, wherein the first color brightness compensation value is determined by the brightness of the fourth color sub-pixel, the actual viewing angle and the reference viewing angle, the second color brightness compensation value is determined by the brightness of the fifth color sub-pixel, the actual viewing angle and the reference viewing angle, and the third color brightness compensation value is determined by the brightness of the sixth color sub-pixel, the actual viewing angle and the reference viewing angle.

Fig. 11 is a schematic partial structure of another flexible display panel according to an embodiment of the present invention, fig. 12 is an enlarged schematic structure of fig. 11 at E, fig. 13 is a schematic relation between actual viewing angle and color coordinates according to an embodiment of the present invention, and as shown in fig. 11-13, the bendable display area 30 includes a plurality of compensation areas 60, the compensation areas 60 include at least one first pixel unit 61, and the first pixel unit 61 includes a first color sub-pixel 611, a second color sub-pixel 612 and a third color sub-pixel 613. The non-bending display area 31 includes at least one second pixel unit 62, where the second pixel unit 62 includes a fourth color sub-pixel 621, a fifth color sub-pixel 622, and a sixth color sub-pixel 623, the first color is the same as the fourth color, the second color is the same as the fifth color, and the third color is the same as the sixth color. The luminance compensation values include a first color luminance compensation value, a second color luminance compensation value, and a third color luminance compensation value. As shown in fig. 13, the abscissa represents the actual viewing angle, the ordinate represents the color coordinate, and when the actual viewing angle of the user is different with respect to the plurality of compensation regions 60, the colors of the different compensation regions 60 are observed differently, reducing the display uniformity of the flexible display panel.

Therefore, by performing brightness compensation on the sub-pixels of each color in the compensation region 60, the brightness compensation degree of the sub-pixels of different colors may be different, so as to adjust the display color of the compensation region 60, so as to reduce the color display difference of the respective compensation regions 60 and the non-bending display region 31, which is observed by the user, and improve the display uniformity.

Specifically, the set luminance compensation value includes a first color luminance compensation value, a second color luminance compensation value, and a third color luminance compensation value, which may be different. When the plurality of compensation regions 60 are respectively subjected to brightness compensation according to the brightness compensation values, the first color sub-pixel 611 is subjected to brightness compensation according to the first color brightness compensation value, the second color sub-pixel 612 is subjected to brightness compensation according to the second color brightness compensation value, and the third color sub-pixel 613 is subjected to brightness compensation according to the third color brightness compensation value. The first color brightness compensation value is determined by the brightness, the actual viewing angle and the reference viewing angle of the fourth color sub-pixel 621, so that the brightness of the first color sub-pixel 611 is the same as or equal to the brightness of the fourth color sub-pixel 621 in the non-bending display area 31, and similarly, the second color brightness compensation value is determined by the brightness, the actual viewing angle and the reference viewing angle of the fifth color sub-pixel 22, and the third color brightness compensation value is determined by the brightness, the actual viewing angle and the reference viewing angle of the sixth color sub-pixel 623, so that the brightness of the sub-pixels with different colors in the compensation area 60 is the same as or equal to the brightness of the sub-pixels with the same color in the non-bending display area 31, and further, the display color of the bendable display area 30 viewed by the user is the same as or equal to the display color of the non-bending display area 31, which is helpful to eliminate the color display difference between the compensation area 60 and the non-bending display area 31 viewed by the user, and the display uniformity is improved.

Fig. 14 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention, as shown in fig. 14, optionally, the non-bending display area 31 includes at least a first non-bending sub-display area 311 and a second non-bending sub-display area 312, and the first non-bending sub-display area 311 and the second non-bending sub-display area 312 are respectively located at two sides of the bendable display area 30. The included angle between the plane of the first non-bending sub-display area 311 and the plane of the second non-bending sub-display area 312 is phi, and when phi is less than 180 degrees, the display control method provided by the embodiment of the invention further includes:

and carrying out brightness compensation on the first non-bending sub-display area and/or the second non-bending sub-display area according to the reference viewing angle.

In some special cases, the first non-bending sub-display area 311 and the second non-bending sub-display area 312 may not be on the same plane, for example, when the flexible display panel is bent, or the first non-bending sub-display area 311 and the second non-bending sub-display area 312 are not on the same plane due to manufacturing process errors or damage during use, at this time, when the user views the flexible display panel, there is a difference between the reference viewing angle of the user's eyes relative to the first non-bending sub-display area 311 and the reference viewing angle of the user's eyes relative to the second non-bending sub-display area 312, so that the brightness of the first non-bending sub-display area 311 and the brightness of the second non-bending sub-display area 312 viewed by the user's eyes are different. Therefore, the brightness compensation is respectively carried out on the different non-bending sub-display areas according to the reference viewing angles of the different non-bending sub-display areas, so that the visual brightness difference between the non-bending sub-display areas observed by a user is reduced, and the display uniformity is improved.

Optionally, performing brightness compensation on the first non-bending sub-display area and/or the second non-bending sub-display area according to the reference viewing angle includes:

step 51, obtaining a first reference viewing angle of the eyes of the user relative to the first non-bending sub-display area.

Step 52, obtaining a second reference viewing angle of the eyes of the user relative to the second non-bending sub-display area.

Step 53, performing brightness compensation on the first non-bending sub-display area and/or the second non-bending sub-display area according to the first reference viewing angle and the second reference viewing angle.

The first reference viewing angle of the user's eyes relative to the first non-bending sub-display area and the second reference viewing angle of the user's eyes relative to the second non-bending sub-display area are obtained respectively, the first reference viewing angle and the second reference viewing angle are compared, when the first reference viewing angle is different from the second reference viewing angle, the brightness of the first non-bending sub-display area and the brightness of the second non-bending sub-display area viewed by the user are different, and at this time, the brightness of the first non-bending sub-display area and/or the brightness of the second non-bending sub-display area can be adjusted according to the difference between the first reference viewing angle and the second reference viewing angle, so that the difference of the display brightness of the first non-bending sub-display area and the second non-bending sub-display area viewed by the user is reduced, and the display uniformity is improved.

As shown in fig. 14, the reference viewing angle θ8 of the user's eyes with respect to the first non-inflection sub-display area 311 and the second reference viewing angle θ9 of the user's eyes with respect to the second non-inflection sub-display area 312 are obtained, respectively, where θ8 < θ9 results in that the brightness of the first non-inflection sub-display area 311 viewed by the user is greater than the brightness of the second non-inflection sub-display area 312, at this time, the brightness of the second non-inflection sub-display area 312 may be increased, or the brightness of the first non-inflection sub-display area 311 may be decreased, or the brightness of the second non-inflection sub-display area 312 may be increased while the brightness of the first non-inflection sub-display area 311 is decreased, so as to reduce or eliminate the difference in display brightness between the first non-inflection sub-display area 311 and the second non-inflection sub-display area 312 viewed by the user, and to improve the display uniformity.

According to the display control method provided by the embodiment of the invention, the bendable display area is divided into the plurality of compensation areas, the actual viewing angle of the eyes of the user relative to each compensation area is obtained, the reference viewing angle of the eyes of the user relative to the non-bending display area is obtained, and the brightness compensation is respectively carried out on the plurality of compensation areas according to the deviation between the reference viewing angle and the actual viewing angle of the eyes of the user relative to each compensation area, so that the display brightness difference between each compensation area and the non-bending display area, which is watched by the user, is reduced, the display uniformity is improved, the crease is weakened or eliminated visually, and the influence of the crease on the display effect is avoided. The brightness compensation is respectively carried out on the sub-pixels of each color in the compensation area, and the brightness compensation degree of the sub-pixels of different colors can be different, so that the display color of the compensation area is adjusted, the color display difference of each compensation area and the non-bending display area, which is observed by a user, is reduced, and the display uniformity is improved. The brightness compensation is respectively carried out on the different non-bending sub-display areas according to the reference viewing angles of the different non-bending sub-display areas, so that the visual brightness difference between the non-bending sub-display areas observed by a user is reduced, and the display uniformity is further improved.

Based on the same inventive concept, an embodiment of the present invention further provides a flexible display panel for performing the display control method provided in any of the above embodiments, and with continued reference to fig. 5, the flexible display panel 20 includes a display area 201, the display area 201 includes a bendable display area 30 and a non-bendable display area 31, and the bendable display area 30 includes a plurality of compensation areas.

Fig. 15 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention, where, as shown in fig. 15, the flexible display surface bar according to the embodiment of the present invention further includes:

an actual viewing angle acquisition module 70, configured to acquire an actual viewing angle of the eyes of the user with respect to each of the compensation areas.

A reference viewing angle acquisition module 71, configured to acquire a reference viewing angle of the eyes of the user relative to the non-bending display area.

And a brightness compensation module 72, configured to perform brightness compensation on the plurality of compensation regions according to the actual viewing angle and the reference viewing angle.

The display brightness of the bendable display area and the display brightness of the non-bendable display area are different from each other, so that the brightness compensation is respectively carried out on the compensation areas according to the deviation between the reference viewing angle and the actual viewing angle of the user eyes relative to each compensation area, the difference of the display brightness of each compensation area and the non-bendable display area, which is observed by the user, can be reduced, the display uniformity is improved, and the visual weakening or elimination of folds is facilitated.

Optionally, the actual viewing angle acquisition module 70 includes:

a morphology information obtaining unit 701, configured to obtain morphology information of the bendable display area;

a spatial position information acquisition unit 702 for acquiring spatial position information of eyes of a user;

an actual viewing angle obtaining module determining unit 703, configured to determine an actual viewing angle of the user's eyes with respect to each compensation area according to the morphological information of the bendable display area and the spatial position information of the user's eyes.

Specifically, by acquiring the morphological information of the bendable display area and the spatial position information of the eyes of the user, the actual viewing angle of the position of the eyes of the user for each compensation area can be calculated, so that the brightness compensation is respectively carried out on the plurality of compensation areas according to the actual viewing angle of the eyes of the user for each compensation area and the difference of the reference viewing angle of the eyes of the user for the non-bendable display area, the display brightness difference of each compensation area and the non-bendable display area, which is watched by the user, is reduced or eliminated visually, and the display uniformity is improved.

Optionally, the profile information acquiring unit 701 includes any one of a stress sensor, an optical sensor, and an electrical sensor, and the spatial position information acquiring unit 702 includes a camera.

Any one of a stress sensor, an optical sensor and an electrical sensor can be arranged on the flexible display panel as a morphology information acquisition unit 701, and the sensor can acquire morphology information of the bendable display area in real time in the use process of the flexible display panel, so that any deformation of the bendable display area of the flexible display panel in the use process is monitored, and more accurate brightness compensation is performed on each compensation area in the bendable display area.

The flexible display panel can be further provided with a camera as the spatial position information obtaining unit 702, and in general, all electronic products such as a mobile phone are provided with front cameras, so that the existing front cameras can be utilized to obtain the spatial position information of eyes of a user, and the cost is reduced. When the camera obtains the spatial position information of the eyes of the user, the requirement on positioning accuracy is low, so that the camera can work in a low-power consumption mode, for example, single-color grabbing and the like are adopted, and a person skilled in the art can set the camera according to actual requirements.

In other embodiments, a person skilled in the art may use a ranging sensor or other devices to obtain the morphological information of the bendable display area and obtain the spatial position information of the eyes of the user according to actual needs, which is not limited in the embodiments of the present invention.

Fig. 16 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention, as shown in fig. 16, optionally, the flexible display panel according to an embodiment of the present invention further includes a bendable non-display area 33, the bendable non-display area 33 is adjacent to the bendable display area 30, and the morphology information obtaining unit 701 is disposed in the bendable non-display area 33.

As shown in fig. 16, the flexible display panel includes a non-display area 202 disposed around a display area 201, the non-display area 202 includes a bendable non-display area 33, and since the bendable non-display area 33 is adjacent to the bendable display area 30, the bendable non-display area 33 is close to the bendable display area 30 in terms of deformation, and thus, the shape information acquisition unit 701 is disposed in the bendable non-display area 33, ensuring accurate shape information acquisition while avoiding the shape information acquisition unit 701 from affecting the display effect of the flexible display panel.

With continued reference to fig. 16, the non-display area 202 further includes a non-bending non-display area 34, and the morphology information acquisition unit 701 may be disposed in the bendable non-display area 33, so as to avoid that the morphology information acquisition unit 701 affects the display effect of the flexible display panel, where the closer the distance between the morphology information acquisition unit 701 and the bendable display area 30, the more accurate the morphology information acquired.

In other embodiments, the actual viewing angle obtaining module 70 may include one profile information obtaining unit 701, or may include a plurality of profile information obtaining units 701, and those skilled in the art may set the number and positions of the profile information obtaining units 701 according to actual requirements, which is not limited in the embodiment of the present invention.

With continued reference to fig. 15, optionally, the flexible display panel provided by the embodiment of the present invention further includes a luminance compensation information presetting module 73, configured to preset luminance compensation information, where the luminance compensation information includes a correspondence relationship between an actual viewing angle, a reference viewing angle, and a luminance compensation value, and the luminance compensation module 72 includes:

a brightness compensation value determining unit 721 for determining brightness compensation values corresponding to the actual viewing angle and the reference viewing angle according to the actual viewing angle, the reference viewing angle and the brightness compensation information.

And a compensation unit 722, configured to perform brightness compensation on the plurality of compensation regions according to the brightness compensation value.

According to the flexible display panel provided by the embodiment of the invention, the bendable display area is divided into the plurality of compensation areas, the actual viewing angle of the eyes of the user relative to each compensation area is obtained, the reference viewing angle of the eyes of the user relative to the non-bending display area is obtained, and the brightness compensation is respectively carried out on the plurality of compensation areas according to the deviation between the reference viewing angle and the actual viewing angle of the eyes of the user relative to each compensation area, so that the display brightness difference between each compensation area and the non-bending display area, which is watched by the user, is reduced or eliminated visually, and the display uniformity is improved.

Based on the same inventive concept, the embodiment of the present invention further provides a display device, and fig. 17 is a schematic structural diagram of the display device provided by the embodiment of the present invention, as shown in fig. 17, where the display device 80 includes a flexible display panel 81 according to any embodiment of the present invention, so that the display device 80 provided by the embodiment of the present invention has the technical effects of the technical solutions in any embodiment, and the same or corresponding structures and explanations of terms as those of the embodiment are not repeated herein. The display device 80 provided in the embodiment of the present invention may be a mobile phone as shown in fig. 17, or any electronic product with a display function, including but not limited to the following categories: television, notebook computer, desktop display, tablet computer, digital camera, smart bracelet, smart glasses, vehicle-mounted display, medical equipment, industrial control equipment, touch interactive terminal, etc., which are not particularly limited in this embodiment of the invention.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims

1. A display control method applied to a flexible display panel, the flexible display panel including a display region including a bendable display region and a non-bendable display region, the bendable display region including a plurality of compensation regions, the display control method comprising:

respectively carrying out brightness compensation on a plurality of compensation areas according to the actual viewing angle and the reference viewing angle;

comparing the actual viewing angle of the compensation area with the reference viewing angle, and when the actual viewing angle is larger than the reference viewing angle, improving the brightness of the compensation area; when the actual viewing angle is smaller than the reference viewing angle, reducing the brightness of the compensation area; when the actual viewing angle is equal to the reference viewing angle, keeping the brightness of the compensation area unchanged;

or,

the compensation areas comprise a first type compensation area and a second type compensation area, and respectively perform brightness compensation on the compensation areas according to the actual viewing angle and the reference viewing angle, and the method comprises the following steps:

determining a first type compensation area and a second type compensation area, wherein the first type compensation area and the user eyes are positioned on the same side of a central axial plane, the second type compensation area and the user eyes are positioned on different sides of the central axial plane, the central axial plane is perpendicular to a first tangential plane and passes through a first intersecting line, the first tangential plane is a tangential plane of a bendable display area at the lowest point, and the first intersecting line is an intersecting line of the first tangential plane and the bendable display area;

And improving the brightness of the first type compensation area and reducing the brightness of the second type compensation area.

2. The display control method according to claim 1, wherein acquiring the actual viewing angle of the user's eyes with respect to each of the compensation areas includes:

obtaining morphology information of the bendable display area;

acquiring spatial position information of eyes of a user;

and determining the actual viewing angle of the eyes of the user relative to each compensation area according to the morphological information of the bendable display area and the spatial position information of the eyes of the user.

3. The display control method according to claim 2, wherein determining an actual viewing angle of the user's eyes with respect to each of the compensation regions based on the topographic information of the bendable display region and the spatial position information of the user's eyes, comprises:

determining a first normal direction of each compensation area according to the morphological information of the bendable display area, wherein the first normal direction of the compensation area is perpendicular to a tangent plane of the compensation area;

obtaining a first sight line direction of the user eyes relative to each compensation area according to the spatial position information of the user eyes, wherein the first sight line direction of the compensation areas is a connecting line direction between the spatial positions of the user eyes and the compensation areas;

And determining an actual viewing angle of the eyes of the user relative to the compensation area according to the first normal direction and the first sight line direction of the compensation area, wherein the actual viewing angle is an included angle between the first normal direction and the first sight line direction in the compensation area.

4. The display control method according to claim 1, wherein,

increasing the brightness of the first type compensation region and decreasing the brightness of the type compensation region, comprising:

determining the shortest distance between each first type compensation area and the first intersection line, and determining a first brightness compensation value of each first type compensation area according to the shortest distance;

performing brightness compensation on the first type compensation area according to the first brightness compensation value;

determining the shortest distance between each second type compensation area and the first intersection line, and respectively determining a second brightness compensation value of each second type compensation area according to the shortest distance;

and carrying out brightness compensation on the second type compensation area according to the second brightness compensation value.

5. The display control method according to claim 4, wherein the first type compensation region includes at least a first a region and a first b region, and the second type compensation region includes at least a second a region and a second b region;

determining a first shortest distance between the first intersection and the first region, and determining a second shortest distance between the first second region and the first intersection;

determining a first brightness compensation value of the first area according to the first shortest distance, and determining a first second brightness compensation value of the first second area according to the second shortest distance, wherein the first shortest distance is smaller than the second shortest distance, and the first brightness compensation value is smaller than the first second brightness compensation value;

performing brightness compensation on the first area according to the first brightness compensation value, and performing brightness compensation on the first second area according to the first second brightness compensation value;

Determining a third shortest distance between the second first intersection and the second first intersection, and determining a fourth shortest distance between the second intersection and the first intersection;

determining a second first brightness compensation value of the second first area according to the third shortest distance, and determining a second brightness compensation value lifted by the second area according to the fourth shortest distance, wherein the third shortest distance is smaller than the fourth shortest distance, and the second first brightness compensation value is smaller than the second brightness compensation value;

6. The display control method according to claim 2, wherein obtaining the morphological information of the bendable display area includes:

bending the flexible display panel for a plurality of times to form a stable appearance in the bendable display area;

and obtaining and storing the morphology information of the bendable display area.

7. The display control method according to claim 2, wherein obtaining the morphological information of the bendable display area includes:

8. The display control method according to claim 1, characterized by further comprising, before acquiring the actual viewing angle of the user's eyes with respect to each of the compensation areas:

presetting brightness compensation information, wherein the brightness compensation information comprises a corresponding relation among the actual viewing angle, the reference viewing angle and a brightness compensation value;

determining brightness compensation values corresponding to the actual viewing angle and the reference viewing angle according to the actual viewing angle, the reference viewing angle and the brightness compensation information;

and respectively carrying out brightness compensation on the plurality of compensation areas according to the brightness compensation value.

9. The display control method of claim 8, wherein the compensation region comprises at least one first pixel cell comprising a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel; the non-bending display area comprises at least one second pixel unit, and the second pixel unit comprises a fourth color sub-pixel, a fifth color sub-pixel and a sixth color sub-pixel; the first color is the same as the fourth color, the second color is the same as the fifth color, and the third color is the same as the sixth color;

10. The display control method according to claim 1, wherein the non-bending display area includes at least a first non-bending sub-display area and a second non-bending sub-display area, the first non-bending sub-display area and the second non-bending sub-display area being located at two sides of the bendable display area, respectively;

The included angle between the plane of the first non-bending sub-display area and the plane of the second non-bending sub-display area is phi, and when phi is less than 180 degrees, the display control method further comprises the following steps:

11. The display control method according to claim 10, wherein performing brightness compensation on the first non-folded sub-display area and/or the second non-folded sub-display area according to the reference viewing angle, comprises:

acquiring a first reference viewing angle of the user's eyes relative to the first non-bending sub-display area;

acquiring a second reference viewing angle of the user's eyes relative to the second non-bending sub-display area;

and performing brightness compensation on the first non-bending sub-display area and/or the second non-bending sub-display area according to a first reference viewing angle and the second reference viewing angle.

12. A flexible display panel for performing the display control method of any one of claims 1-11, wherein the flexible display panel comprises a display area comprising a bendable display area and a non-bendable display area, the bendable display area comprising a plurality of compensation areas, the flexible display panel further comprising:

13. The flexible display panel of claim 12, wherein the actual viewing angle acquisition module comprises:

the morphology information acquisition unit is used for acquiring morphology information of the bendable display area;

a spatial position information acquisition unit for acquiring spatial position information of eyes of a user;

and the actual viewing angle acquisition module determining unit is used for determining the actual viewing angle of the eyes of the user relative to each compensation area according to the morphological information of the bendable display area and the spatial position information of the eyes of the user.

14. The flexible display panel according to claim 13, wherein the topographical information acquisition unit includes any one of a stress sensor, an optical sensor, and an electrical sensor;

The spatial position information acquisition unit comprises a camera.

15. The flexible display panel of claim 14, further comprising a bendable non-display region adjacent to the bendable display region;

the morphology information acquisition unit is arranged in the bendable non-display area.

16. The flexible display panel according to claim 12, further comprising a brightness compensation information presetting module for presetting brightness compensation information including a correspondence relationship among the actual viewing angle, the reference viewing angle, and a brightness compensation value;

the brightness compensation module includes:

a brightness compensation value determining unit configured to determine a brightness compensation value corresponding to the actual viewing angle and the reference viewing angle according to the actual viewing angle, the reference viewing angle, and the brightness compensation information;

and the compensation unit is used for respectively carrying out brightness compensation on the plurality of compensation areas according to the brightness compensation value.

17. A display device comprising the flexible display panel of any one of claims 12-16.