CN112259035A

CN112259035A - Display control method, flexible display panel and display device

Info

Publication number: CN112259035A
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: 2021-01-22
Anticipated expiration: 2040-10-30
Also published as: CN112259035B

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 the eyes of the user relative to each compensation area; acquiring a reference viewing angle of the eyes of the user relative to the non-bending display area; and respectively carrying out brightness compensation on the plurality of compensation regions 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 the brightness compensation is performed on the 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 viewed 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

The flexible display screen has the characteristics of being bendable and foldable, so that the display device is lighter, thinner and more portable, and has been widely paid attention to and researched at present.

When flexible display screen was used in electronic equipment such as folding cell-phone, flexible display screen can follow fixed folding axle and fold the operation, but flexible display screen resumes to flat state back from fold condition, because the influence of stress, flexible display screen can produce the deformation that can not resume, this deformation can cause flexible display screen to show uneven problem, make the user can see obvious crease when watching flexible display screen, the existence of crease can to a great extent influence flexible display screen's display effect.

Disclosure of Invention

The invention provides a display control method, a flexible display panel and a display device, which aim to improve display uniformity and visually weaken or eliminate creases.

In a first aspect, an embodiment of the present invention provides a display control method, which is 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, where the display control method includes:

acquiring an actual viewing angle of the eyes of the user relative to each compensation area;

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

and respectively carrying out brightness compensation on the plurality of compensation regions 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, configured to perform 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, 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;

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

and the brightness compensation module is used for respectively performing brightness compensation on the 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-bendable 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-bendable display area viewed by the user is reduced, the display uniformity is improved, the crease is visually weakened or eliminated, and the influence of the crease on the display effect is avoided.

Drawings

Fig. 1 is a schematic structural 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 in FIG. 1 along the direction A-A';

FIG. 3 is a diagram illustrating a luminance distribution of the flexible display panel of FIG. 1;

fig. 4 is a schematic flowchart 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 taken along line B-B' of FIG. 5;

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

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

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

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

fig. 11 is a schematic partial structure diagram 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 of the relationship between actual viewing angles and color coordinates provided by 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 structural diagram 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 present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is a schematic structural diagram of a conventional flexible display panel, fig. 2 is a schematic structural diagram of a cross-section of a light emitting surface of the flexible display panel in fig. 1 along a direction a-a', and fig. 3 is a schematic diagram of a luminance distribution of the flexible display panel in fig. 1. Referring to fig. 1-3, the flexible display panel includes a display area 10, 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 can be deformed irreversibly, so that the light emitting surface of the bendable display area 101 is at a certain angle relative to the non-bendable display area 102, when a user observes the bendable display area 101, a difference is generated between a viewing angle for actually observing the bendable display area 101 and a viewing angle for actually observing the non-bendable display area 102, so that discontinuous changes of display brightness of the flexible display panel can be sensed, an obvious crease is observed in the bendable display area 101, and a display effect of the flexible display panel is affected.

Specifically, as shown in fig. 2 and fig. 3, an included angle between a line of sight direction 11 of the user's eyes and a normal direction 12 of the non-bending display area 102 at a point a is a, and the normal direction 12 is perpendicular to a plane where the non-bending display area 102 is located; an included angle B is formed between the sight line direction 11 of the eyes of the user and a normal direction 13 of the bendable display area 101 at the point B, and the normal direction 13 is perpendicular to a tangential direction 14 of the bendable display area 101 at the point B; an included angle between the line of sight direction 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 different because the bendable display area 101 is deformed irreversibly after being repeatedly folded, as shown in fig. 2, C < a < b. Fig. 3 shows the brightness of each position of the flexible display panel observed by the eyes of the user along the viewing direction 11 when the included angle a is 60 °, where the solid line is a measured value of the brightness, the dash-dot line is a calculated value of the brightness, the abscissa represents the position, and the ordinate represents the brightness, as shown in fig. 3, because the bendable display area 101 is deformed, the brightness of the flexible display panel in the bendable display area 101 changes greatly, the brightness at the point C is greater than the brightness at the point a, and the brightness at the point a is greater than the brightness at the point B, so that a problem of display unevenness occurs, at this time, the user may see a crease as shown in fig. 1 on the flexible display panel, and the display effect of the flexible display panel may be greatly affected by the existence of the crease.

Based on the foregoing technical problem, 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 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 the eyes of the user relative to the 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-bendable display area is 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 plurality of compensation areas are subjected to brightness compensation respectively, so that the display brightness difference of each compensation area and the non-bendable display area viewed by the user is reduced, the display uniformity is improved, the crease is visually weakened or eliminated, and the influence of the crease on the display effect is avoided.

The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.

Fig. 4 is a schematic flow diagram 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 sectional structural diagram of fig. 5 along a direction B-B', as shown in fig. 4-6, the display control method according to an embodiment of the present invention is applicable 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 the actual viewing angle of the eyes of the user relative to each compensation area.

Wherein, because the bendable display area 30 is bent many times, receives the influence of stress, can produce unrecoverable deformation, and this deformation makes the user when watching flexible display panel 20, and user's eyes 50 have different actual viewing angles for the different regions in the bendable display area 30, consequently, the luminance of the different regions in the bendable display area 30 that the user observed is different, produces and shows uneven problem. 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 eyes 50 of the user 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 viewed by the user is the same or equivalent, which is helpful for improving the display uniformity.

It should be noted that the number of the compensation regions in the flexible display area 30, the area of the compensation regions, and the shape and the position of the compensation regions can be set according to actual requirements, for example, the shape of the compensation regions is square, rectangle, triangle, hexagon, etc., which is not limited in the embodiment of the present invention. In general, the larger the number of compensation regions divided by the bendable display region 30 is, the smaller the area of each compensation region is, and the more accurate the luminance compensation for the bendable display region 30 is, so that the display uniformity of the flexible display panel 20 is better, and for example, the compensation region is set to include one pixel, so that the luminance compensation is accurate to the pixel level, thereby greatly improving the display uniformity of the flexible display panel 20.

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

The actual viewing angle of the user's eyes 50 relative to the bendable display area 30 and the reference viewing angle of the user's eyes 50 relative to the bendable display area 30 are different due to the unrecoverable deformation of the bendable display area 30, so that 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, and the reference viewing angle of the user's eyes 50 relative to the non-bendable display area 31 is obtained as a reference, so that 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, thereby improving the display uniformity and being beneficial to weakening or eliminating creases visually.

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

As mentioned above, the angle at which the user views the flexible display panel 20 affects the brightness of the display viewed by the user, and the reference viewing angles of the user's eyes 50 relative to different regions in the non-bending display area 31 are substantially the same, so that the display uniformity of the non-bending display area 31 is good; because the bendable display area 30 is deformed, the actual viewing angle of the user's eyes 50 relative to the compensation area is different from the reference viewing angle, and further 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, so that the brightness compensation is performed on the compensation areas respectively according to the deviation between the reference viewing angle and the actual viewing angle of the user's eyes 50 relative to each compensation area, and different brightness compensation is performed according to different deviations, so that the display brightness difference between each compensation area viewed by the user and the non-bendable display area 31 is reduced, the display uniformity is improved, and the crease marks are reduced or eliminated visually.

Optionally, obtaining an actual viewing angle of the user's eye with respect to each of the compensation regions includes:

and 11, acquiring the shape information of the bendable display area.

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

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

Specifically, 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's eyes 50 relative to each compensation area and a reference viewing angle of the user's eyes 50 relative to the non-bendable display area 31, and therefore, by obtaining the topographic information of the bendable display area 30 and the spatial position information of the user's eyes 50, the actual viewing angle of the position of the user's eyes 50 relative to each compensation area can be calculated, so that according to the difference between the actual viewing angle of the user's eyes 50 relative to each compensation area and the reference viewing angle of the user's eyes 50 relative to the non-bendable display area 31, the brightness compensation is respectively performed on the compensation areas, the display brightness difference between each compensation area and the non-bendable display area viewed by the user is reduced, and creases are visually reduced or eliminated, the display uniformity is improved.

For example, as shown in fig. 5, an XYZ space coordinate system may be established, the spatial position information of the user's eye 50 may be obtained by acquiring the coordinates of the user's eye 50 in the XYZ space coordinate system, the topographic information of the bendable display area may be obtained by acquiring the coordinates of each compensation area in the XYZ space coordinate system, and the actual viewing angle of the position of the user's eye 50 to each compensation area may be calculated according to the coordinates of the user's eye 50 in the XYZ space coordinate system and the coordinates of each compensation area in the XYZ space coordinate system. The XYZ spatial coordinate system may also 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's eyes relative to each compensation region according to the shape information of the bendable display region and the spatial position information of the user's eyes includes:

step 131, determining a first normal direction of each compensation region according to the topographic information of the bendable display region, wherein the first normal direction of the compensation region is perpendicular to a tangent plane of the compensation region.

The tangent plane of the compensation area can be a tangent plane at any point in the compensation area, and a person skilled in the art can set the tangent plane according to actual needs.

Illustratively, as shown in fig. 5 and 6, taking the tangent plane of the compensation region as the tangent plane at the central point of the compensation region as an example, 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 tangent plane 43 of the first compensation region 301, and the first normal direction 44 of the second compensation region 302 is perpendicular to the tangent plane 45 of the second compensation region 302.

Step 132, obtaining a first sight direction of the user's eyes relative to each compensation area according to the spatial position information of the user's eyes, where the first sight direction of the compensation areas is a connecting line direction between the spatial position of the user's eyes and the compensation areas.

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

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

Step 133, determining an actual viewing angle of the user's eyes relative to the compensation region according to the first normal direction and the first gaze direction of the compensation region, where the actual viewing angle is an included angle between the first normal direction and the first gaze direction in the compensation region.

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

Illustratively, as shown in fig. 5 and 6, the actual viewing angle θ 2 is obtained by calculating the angle between the first line of sight direction 46 and the first normal direction 42 of the first compensation region 301, and the actual viewing angle θ 3 is obtained by calculating the angle between the first line of sight direction 47 and the first normal direction 44 of the second compensation region 302.

Fig. 7 is a schematic diagram of a relationship between an actual viewing angle and brightness according to an embodiment of the present invention, where as shown in fig. 7, an abscissa represents the actual viewing angle, an ordinate represents brightness, and the actual viewing angle is different, and the viewed brightness is also different. For example, as shown in fig. 5 and 6, since the bendable display region 30 is irreversibly deformed after being bent for a plurality of times, and the actual viewing angle θ 2 is different from the actual viewing angle θ 3, when a user views the flexible display panel 20, the brightness of the first compensation region 301 and the brightness of the second compensation region 302 are different, and the brightness of the first compensation region 301 and the brightness of the second compensation region 302 are compensated according to the deviation between the actual viewing angle θ 2 of the first compensation region 301 and the actual viewing angle θ 3 of the second compensation region 302, so that the brightness difference between the first compensation region 301 and the second compensation region 302 viewed by the user can be reduced, and the display uniformity can be improved.

In the above embodiment, optionally, the obtaining a reference viewing angle of the user's eye with respect to the non-bending display region includes:

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

And 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.

Wherein, 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's eyes 50 relative to each compensation area and a reference viewing angle of the user's eyes 50 relative to the non-bendable display area 31, therefore, by obtaining the shape information of the bendable display area 30 and the spatial position information of the user's eyes 50, a reference viewing angle of the user's eyes 50 to the non-bendable display area 31 can be calculated, so as to perform brightness compensation on the compensation areas according to the difference between the actual viewing angle of the user's eyes 50 relative to each compensation area and the reference viewing angle of the user's eyes 50 relative to the non-bendable display area 31, reduce the display brightness difference between each compensation area and the non-bendable display area viewed by the user, and weaken or eliminate creases visually, the display uniformity is improved.

Optionally, determining a reference viewing angle of the user's eye relative to the non-bending display region according to the spatial position information of the user's eye 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.

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

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

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

Illustratively, as shown in fig. 5 and 6, the direction of the line connecting the spatial position of the user's eye and the non-bending display area 31 is the direction of the line connecting the spatial position of the user's eye and the edge point O of the non-bending display area 31. The edge point O is located at a position where the non-bending display area 31 is close to the bending display area 30, so that the non-bending display area 31 after the brightness compensation has a similar visual effect to the non-bending display area 31 adjacent to the non-bending display area 31, which is helpful for eliminating the crease. Preferably, the edge point O may be located at a boundary of the non-bendable display region 31 and the bendable display region 30.

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

Illustratively, as shown in fig. 5 and 6, the reference viewing angle θ 1 is obtained by calculating an angle between the second line-of-sight direction 40 and the second normal direction 41.

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

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

Since the bendable display area 30 is deformed, 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 viewed by the user is different from the brightness of the non-bendable display area 31, as shown in fig. 7, the larger the actual viewing angle is, the smaller the viewed brightness is.

For example, as shown in fig. 6, the bendable display area 30 includes a first compensation area 301 and a second compensation area 302, and since the bendable display area 30 is deformed, an actual viewing angle θ 2 of the first compensation area 301 is greater than a reference viewing angle θ 1, and an actual viewing angle θ 3 of the second compensation area 302 is less than the reference viewing angle θ 1, a brightness of the first compensation area 301 viewed by a user is less than a brightness of the non-bendable display area 31, and a brightness of the second compensation area 302 viewed by the user is greater than a brightness of the non-bendable display area 31.

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

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

Performing brightness compensation on the plurality of compensation regions according to the actual viewing angle and the reference viewing angle, respectively, including:

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

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

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

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

Since the bendable display area 30 is usually a concave curved surface, the actual viewing angle of the first kind of compensation area on the same side of the central axis surface 48 as the eyes of the user is larger than the reference viewing angle, and the brightness of the first kind of compensation area viewed by the user is smaller than that of the non-bendable display area 31; the actual viewing angle of the second type of compensation regions on a different side of the medial axis plane 48 from the user's eyes is less than the reference viewing angle and the brightness of the first type of compensation regions as viewed by the user is greater than the brightness of the non-bending display region 31. When the display control method provided by the embodiment of the invention is used for performing 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-bent display area 31 and the non-bent display area 31 observed by a user can be reduced, the crease can be weakened or eliminated visually, and the display uniformity is improved.

Optionally, the increasing the brightness of the first kind of compensation region and the decreasing the brightness of the first kind of compensation region include:

step 321, determining a 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 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 324, performing brightness compensation on the second type compensation area according to the second brightness compensation value.

Since the bendable display area 30 is usually a concave curved surface, and there is a certain relationship between the shortest distance between each compensation area and the first intersection line and the actual viewing angle, the brightness compensation can be performed according to the shortest distance between each 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 region and the first intersection line may be the shortest distance between any one point in the compensation region and the first intersection line, for example, the shortest distance between the compensation region and the first intersection line is the shortest distance between the center point of the compensation region and the first intersection line, or the shortest distance between the compensation region and the first intersection line is the shortest distance between the side of the compensation region close to or far from the first intersection line and the first intersection line, and those skilled in the art can set the shortest distance according to actual requirements.

Fig. 8 is a schematic partial structure view of a flexible display panel according to an embodiment of the present invention, fig. 9 is a schematic cross-sectional structure view along the direction C-C' of fig. 8, as shown in fig. 8 and fig. 9, for example, the bendable display area 30 includes a third compensation region 303, a fourth compensation region 304, a fifth compensation region 305 and a sixth compensation region 306, the third compensation region 303 and the fourth compensation region 304 are compensation regions of a first type, and the fifth compensation region 305 and the sixth compensation region 306 are compensation regions of a second type. Taking the shortest distance between the compensation region and the first intersection 51 as the shortest distance between the first intersection 51 and the side of the compensation region away from the first intersection 51 as an example, the shortest distance between the third compensation region 303 and the first intersection 51 is d1, the shortest distance between the fourth compensation region 304 and the first intersection 51 is d2, the shortest distance between the fifth compensation region 305 and the first intersection 51 is d3, and the shortest distance between the sixth compensation region 306 and the first intersection 51 is d 4. As shown in fig. 9, the shortest distance d1 between the third compensation region 303 and the first intersection line 51 and the shortest distance d2 between the fourth compensation region 304 and the first intersection line 51 are different, and since the foldable display region 30 is generally a concave curved surface, the actual viewing angle θ 4 of the third compensation region 303 and the actual viewing angle θ 5 of the fourth compensation region 304 are different, and the brightness of the third compensation region 303 and the brightness of the fourth compensation region 304 viewed by the user are also different. By performing brightness compensation on the third compensation region 303 and the fourth compensation region 304 according to the shortest distance d1 between the third compensation region 303 and the first intersection line 51 and the shortest distance d2 between the fourth compensation region 304 and the first intersection line 51, respectively, the difference in display brightness between the third compensation region 303 and the fourth compensation region 304 viewed by the user can be reduced, and display uniformity can be improved. Similarly, by performing brightness compensation on the fifth compensation region 305 and the sixth compensation region 306 according to the shortest distance d3 between the fifth compensation region 305 and the first intersection line 51 and the shortest distance d4 between the sixth compensation region 306 and the first intersection line 51, respectively, the difference in display brightness between the fifth compensation region 305 and the sixth compensation region 306 viewed by the user can be reduced, and the display uniformity can be improved.

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

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

step 3211, determining a first shortest distance between the first area and the first intersection, and determining a second shortest distance between the first second area 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 increased by the first second area according to the second shortest distance, where 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 type compensation area according to the first brightness compensation value, including:

and performing brightness compensation on the first A area according to the first A brightness compensation value, and performing brightness compensation on the first B area according to the first B 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 area and the first intersecting line, and determining a fourth shortest distance between the second area and the first intersecting line.

Step 3232, determining a second brightness compensation value of the second zone according to the third shortest distance, and determining a second brightness compensation value increased by the second zone according to the fourth shortest distance, where the third shortest distance is smaller than the fourth shortest distance, and the second 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, wherein the brightness compensation comprises the following steps:

and performing brightness compensation on the second zone according to the second brightness compensation value, and performing brightness compensation on the second diethyl zone according to the second diethyl brightness compensation value.

Since the bendable display area 30 is usually a concave curved surface, the smaller the shortest distance between the bendable display area and the first intersection line is, the closer the actual viewing angle is to the reference viewing angle, the closer the visual brightness is to the visual brightness of the non-bendable display area 31; the compensation region having the larger shortest distance to the first intersection line has the larger difference between the actual viewing angle and the reference viewing angle, and the larger difference between the visual brightness and the visual brightness of the non-bent display region 31, so that the compensation region having the smaller shortest distance to the first intersection line can perform brightness compensation to different degrees, and the compensation region having the larger shortest distance to the first intersection line can perform brightness compensation to a larger degree, so as to improve the display uniformity.

With continued reference to fig. 8 and 9, exemplarily, the fourth compensation area 304 serves as a first second area, the third compensation area 303 serves as a first area, a shortest distance d2 between the fourth compensation area 304 and the first intersection line 51 is a first shortest distance, a shortest distance d1 between the third compensation area 303 and the first intersection line 51 is a second shortest distance, and a shortest distance d2 between the fourth compensation area 304 and the first intersection line 51 is smaller than a shortest distance d1 between the third compensation area 303 and the first intersection line 51. As shown in fig. 9, the actual viewing angle θ 5 of the fourth compensation region 304 and the actual viewing angle θ 4 of the third compensation region 303 are both greater than the reference viewing angle θ 1, and the actual viewing angle θ 5 of the fourth compensation region 304 is smaller than the actual viewing angle θ 4 of the third compensation region 303, and thus, the difference between the actual viewing angle θ 5 of the fourth compensation region 304 and the reference viewing angle θ 1 is smaller than the actual viewing angle θ 4 of the third compensation region 303. The first brightness compensation value increased by the fourth compensation region 304 is determined according to the shortest distance d2 between the fourth compensation region 304 and the first intersection line 51, the first second brightness compensation value increased by the third compensation region 303 is determined according to the shortest distance d1 between the third compensation region 303 and the first intersection line 51, the first brightness compensation value is smaller than the first second brightness compensation value, the brightness increased by the fourth compensation region 304 is smaller than the brightness increased by the third compensation region 303, the visual brightness of the fourth compensation region 304 and the visual brightness of the third compensation region 303 after brightness compensation are the same as or equivalent to the visual brightness of the non-bending display region 31, and the display uniformity is further improved.

Similarly, the fifth compensation area 305 is used as the second compensation area, the sixth compensation area 306 is used as the second minor area, the shortest distance d3 between the fifth compensation area 305 and the first intersection line 51 is the third shortest distance, the shortest distance d4 between the sixth compensation area 306 and the first intersection line 51 is the fourth shortest distance, and the shortest distance d3 between the fifth compensation area 305 and the first intersection line 51 is smaller than the shortest distance d4 between the sixth compensation area 306 and the first intersection line 51. As shown in fig. 9, the actual viewing angle θ 6 of the fifth compensation region 305 and the actual viewing angle θ 7 of the sixth compensation region 306 are both smaller than the reference viewing angle θ 1, and the actual viewing angle θ 6 of the fifth compensation region 305 is larger than the actual viewing angle θ 7 of the sixth compensation region 306, and thus, the difference between the actual viewing angle θ 6 of the fifth compensation region 305 and the reference viewing angle θ 1 is smaller than the actual viewing angle θ 7 of the sixth compensation region 306. The reduced second brightness compensation value of the fifth compensation area 305 is determined according to the shortest distance d3 between the fifth compensation area 305 and the first intersection line 51, the reduced second brightness compensation value of the sixth compensation area 306 is determined according to the shortest distance d4 between the sixth compensation area 306 and the first intersection line 51, and the second brightness compensation value is smaller than the second brightness compensation value, so that the reduced brightness degree of the fifth compensation area 305 is smaller than the improved brightness degree of the sixth compensation area 306, the visual brightness of the fifth compensation area 305 and the sixth compensation area 306 after brightness compensation is the same as or equivalent to that of the non-bent display area 31, and the display uniformity is further improved.

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

and 111, bending the flexible display panel for multiple times to enable the bendable display area to form a stable appearance.

And step 112, acquiring and storing the shape information of the bendable display area.

For example, fig. 10 is a schematic view of the flexible display area 30, which is provided in the embodiment of the present invention, the shape information of the flexible display area 30, which is obtained by using the measuring device, may be as shown in fig. 10, and the coordinates of each point on the flexible display area 30 may be stored by using an XYZ spatial coordinate system, so as to store the shape information by storing the coordinate values, and those skilled in the art may also obtain and store the shape information of the flexible display area by using other manners, which is not limited in the embodiment of the present invention.

Since the bendable display area 30 has a stable shape and will not change greatly, the stored shape information can be directly called during the subsequent brightness compensation, and the measurement is not needed again, which is helpful for improving the brightness compensation efficiency.

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

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

Optionally, before acquiring the actual viewing angle of the user's eye relative to each compensation region, the method further includes:

step 410, presetting brightness compensation information, wherein the brightness compensation information comprises a corresponding relation between the actual viewing angle, the reference viewing angle and a brightness compensation value.

and step 33, determining 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 step 34, performing brightness compensation on the plurality of compensation areas according to the brightness compensation values.

Specifically, the corresponding relation between the actual viewing angle, the reference viewing angle and the brightness compensation value can be calculated and stored in advance, in the using process of the flexible display panel, the stored brightness compensation value corresponding to the actual viewing angle and the reference viewing angle can be called according to the actual viewing angle and the reference viewing angle of each compensation area, the brightness compensation value does not need to be calculated again, and the brightness compensation efficiency is improved.

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

Optionally, the compensation region 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 value comprises a first color brightness compensation value, a second color brightness compensation value and a third color brightness compensation value;

and respectively performing brightness compensation on the plurality of compensation areas according to the brightness compensation values, wherein the brightness compensation comprises the following steps:

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, and 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 partial schematic structural view of another flexible display panel according to an embodiment of the present invention, fig. 12 is an enlarged schematic structural view of fig. 11 at E, fig. 13 is a schematic structural view of a relationship between an actual viewing angle and a color coordinate according to an embodiment of the present invention, as shown in fig. 11-13, the bendable display area 30 includes a plurality of compensation regions 60, each compensation region 60 includes at least one first pixel unit 61, and each 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, 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 an actual viewing angle, and the ordinate represents a color coordinate, and when the actual viewing angles of the users relative to the plurality of compensation regions 60 are different, the colors of the different compensation regions 60 viewed by the users are different, which reduces 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 can be different, so as to adjust the display color of the compensation region 60, thereby reducing the color display difference of each compensation region 60 and the non-bending display region 31 viewed by the user, and improving 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, and the first color luminance compensation value, the second color luminance compensation value, and the third color luminance compensation value may be different. When the luminance compensation is performed on each of the plurality of compensation regions 60 according to the luminance compensation value, the first color sub-pixel 611 is luminance-compensated according to the first color luminance compensation value, the second color sub-pixel 612 is luminance-compensated according to the second color luminance compensation value, and the third color sub-pixel 613 is luminance-compensated according to the third color luminance compensation value. Wherein, the first color brightness compensation value is determined by the brightness of the fourth color sub-pixel 621, the actual viewing angle and the reference viewing angle, so that the brightness of the first color sub-pixel 611 is the same as or equivalent to that of the fourth color sub-pixel 621 in the non-bending display region 31, and similarly, the second color brightness compensation value is determined by the brightness of the fifth color sub-pixel 22, 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 623, the actual viewing angle and the reference viewing angle, so that the brightness of the sub-pixels with different colors in the compensation region 60 is the same as or equivalent to that of the sub-pixels with the same color in the non-bending display region 31, and further the display color of the bendable display region 30 viewed by the user is the same as the display color of the non-bending display region 31, which helps to eliminate the color display difference between the compensation region 60 and the non-bending display region 31 viewed by the user, the display uniformity is improved.

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

and 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.

In some special cases, the first non-bending sub-display region 311 and the second non-bending sub-display region 312 may not be in the same plane, for example, when the flexible display panel is bent, or the first non-bending sub-display region 311 and the second non-bending sub-display region 312 are not in 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 a reference viewing angle of the user's eye relative to the first non-bending sub-display region 311 and a reference viewing angle of the user's eye relative to the second non-bending sub-display region 312, so that the brightness of the first non-bending sub-display region 311 and the brightness of the second non-bending sub-display region 312 viewed by the user's eye 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 among the non-bending sub-display areas viewed by a user is reduced, and the display uniformity is improved.

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

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

And step 52, acquiring a second reference viewing angle of the user's eyes relative to the second non-bending sub-display area.

And 53, 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.

The method comprises the steps of respectively obtaining a first reference viewing angle of eyes of a user relative to a first non-bending sub-display area and a second reference viewing angle of the eyes of the user relative to a second non-bending sub-display area, comparing the first reference viewing angle with the second reference viewing angle, 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 are different, and adjusting the brightness of the first non-bending sub-display area and/or the brightness of the second non-bending sub-display area according to the difference value between the first reference viewing angle and the second reference viewing angle so as to reduce the display brightness difference between the first non-bending sub-display area and the second non-bending sub-display area which are viewed by the user and improve the display uniformity.

For example, as shown in fig. 14, a reference viewing angle θ 8 of the user's eye relative to the first non-bending sub-display region 311 and a second reference viewing angle θ 9 of the user's eye relative to the second non-bending sub-display region 312 are respectively obtained, where θ 8 < θ 9, which results in that the brightness of the first non-bending sub-display region 311 viewed by the user is greater than the brightness of the second non-bending sub-display region 312, at this time, the brightness of the second non-bending sub-display region 312 may be increased, or the brightness of the first non-bending sub-display region 311 is decreased while the brightness of the second non-bending sub-display region 312 is increased, so as to reduce or eliminate the display brightness difference between the first non-bending sub-display region 311 and the second non-bending sub-display region 312 viewed by the user, and 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-bendable 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-bendable display area viewed by the user is reduced, the display uniformity is improved, the crease is visually weakened or eliminated, and the influence of the crease on the display effect is avoided. The brightness compensation is 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 a non-bent display area 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 among the non-bending sub-display areas viewed 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, configured to perform the display control method provided in any one 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, and as shown in fig. 15, the flexible display panel according to the embodiment of the present invention further includes:

an actual viewing angle obtaining module 70, configured to obtain an actual viewing angle of the user's eyes with respect to each compensation area.

A reference viewing angle obtaining module 71, configured to obtain a reference viewing angle of the user's eye relative to the non-bending display area.

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

The bendable display area is deformed, so that the actual viewing angle of the eyes of a user relative to the compensation area is different from the reference viewing angle, and the display brightness of the bendable display area viewed by the user is different from the display brightness of the non-bendable display area.

Optionally, the actual viewing angle obtaining module 70 includes:

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

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

an actual viewing angle obtaining module determining unit 703 is configured to determine an actual viewing angle of the user's eyes relative to each compensation region according to the shape information of the bendable display region and the spatial position information of the user's eyes.

Specifically, by acquiring the shape 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 to each compensation area can be calculated, so that the brightness compensation is respectively carried out on a plurality of compensation areas according to the difference between the actual viewing angle of the eyes of the user to each compensation area and the reference viewing angle of the eyes of the user to the non-bending display area, the display brightness difference between each compensation area and the non-bending display area observed by the user is reduced, creases are visually weakened or eliminated, and the display uniformity is improved.

Optionally, the morphology 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 to serve as the morphology information acquisition unit 701, and in the using process of the flexible display panel, the sensor can acquire the morphology information of the bendable display area in real time, so that any deformation of the bendable display area of the flexible display panel in the using process can be monitored, and more accurate brightness compensation can be carried out on each compensation area in the bendable display area.

Still can set up the camera on the flexible display panel and regard as spatial position information acquisition unit 702, under the normal conditions, electronic product such as cell-phone all can set up leading camera, consequently, usable leading camera is to the spatial position information who obtains user's eyes, reduce cost. When the camera acquires the spatial position information of the eyes of the user, the requirement on the positioning precision is low, so that the camera can work in a low-power-consumption mode, for example, monochrome grabbing and the like are adopted, and the technical personnel in the field can set according to actual requirements.

In other embodiments, a person skilled in the art may use a ranging sensor or other devices to acquire the topographic information of the bendable display area and acquire 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 the embodiment of the present invention further includes a bendable non-display region 33, the bendable non-display region 33 is adjacent to the bendable display region 30, and the topographic information acquiring unit 701 is disposed in the bendable non-display region 33.

Exemplarily, as shown in fig. 16, the flexible display panel includes a non-display region 202 disposed around the display region 201, the non-display region 202 includes a bendable non-display region 33, and since the bendable non-display region 33 is adjacent to the bendable display region 30, the degree of deformation of the bendable non-display region 33 is close to that of the bendable display region 30, and therefore, the topographic information acquiring unit 701 is disposed in the bendable non-display region 33, so as to ensure accurate acquisition of the topographic information and avoid the topographic information acquiring unit 701 from affecting the display effect of the flexible display panel.

With reference to fig. 16, the non-display region 202 further includes a non-bending non-display region 34, and the topographic information acquiring unit 701 may be disposed in the bending non-display region 33 to avoid the topographic information acquiring unit 701 from affecting the display effect of the flexible display panel, wherein the closer the distance between the topographic information acquiring unit 701 and the bending display region 30 is, the more accurate the acquired topographic information is.

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

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

a brightness compensation value determining unit 721 for determining 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.

The compensation unit 722 is configured to perform brightness compensation on the plurality of compensation regions according to the brightness compensation values.

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 viewed by the user is reduced, the crease mark is visually weakened or eliminated, and the display uniformity is improved.

Based on the same inventive concept, an embodiment of the present invention further provides a display device, fig. 17 is a schematic structural diagram of the display device provided in the embodiment of the present invention, and as shown in fig. 17, 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 in the embodiment of the present invention has the technical effects of the technical solutions in any embodiment, and explanations of structures and terms that are the same as or corresponding to the embodiments are not repeated herein. The display device 80 provided in the embodiment of the present invention may be a mobile phone shown in fig. 17, and may also be any electronic product with a display function, including but not limited to the following categories: the touch screen display system comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal and the like, and the embodiment of the invention is not particularly limited in this respect.

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

Claims

1. The utility model provides a display control method, is applied to flexible display panel, flexible display panel includes the display area, the display area includes bendable display area and non-bending display area, bendable display area includes a plurality of compensation areas, its characterized in that, display control method includes:

2. The display control method according to claim 1, wherein acquiring an actual viewing angle of a user's eye with respect to each of the compensation regions comprises:

acquiring the shape information of the bendable display area;

acquiring spatial position information of eyes of a user;

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

3. The method according to claim 2, wherein determining the actual viewing angle of the user's eyes relative to each compensation region according to the topographic information of the bendable display area and the spatial position information of the user's eyes comprises:

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

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

and determining an actual viewing angle of the user eyes 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 3, wherein performing brightness compensation on the plurality of compensation regions according to the actual viewing angle and the reference viewing angle, respectively, comprises:

5. The display control method according to claim 3, wherein the plurality of compensation regions include a first type of compensation region and a second type of compensation region, and wherein performing the brightness compensation on the plurality of compensation regions according to the actual viewing angle and the reference viewing angle respectively comprises:

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 axis plane, the second type compensation area and the user eyes are positioned on different sides of the central axis plane, the central axis plane is perpendicular to a first tangent plane and passes through a first intersection line, the first tangent plane is a tangent plane of the bendable display area at the lowest point, and the first intersection line is an intersection line of the first tangent plane and the bendable display area;

and the brightness of the first type compensation area is improved, and the brightness of the second type compensation area is reduced.

6. The display control method according to claim 5,

the increasing the brightness of the first kind of compensation area and the decreasing the brightness of the kind of compensation area includes:

determining the shortest distance between each first-class compensation area and the first intersection line, and determining a first brightness compensation value of each first-class 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 performing brightness compensation on the second type compensation area according to the second brightness compensation value.

7. The display control method according to claim 6, wherein the first type of compensation region includes at least a first a region and a first b region, and the second type of compensation region includes at least a second a region and a second b region;

determining a first shortest distance between the first A area and the first intersection line, and determining a second shortest distance between the first B area and the first intersection line;

determining a first brightness compensation value of the first area according to the first shortest distance, and determining a first second brightness compensation value improved by 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 A area according to the first A brightness compensation value, and performing brightness compensation on the first B area according to the first B brightness compensation value;

determining a third shortest distance between the second area and the first intersection line, and determining a fourth shortest distance between the second diethyl area and the first intersection line;

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

8. The display control method according to claim 2, wherein acquiring the topographic information of the bendable display area comprises:

bending the flexible display panel for multiple times to enable the bendable display area to form a stable shape;

and acquiring and storing the shape information of the bendable display area.

9. The display control method according to claim 2, wherein acquiring the topographic information of the bendable display area comprises:

10. The display control method according to claim 1, further comprising, before acquiring an actual viewing angle of a user's eye with respect to each of the compensation regions:

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

11. The display control method according to claim 10, wherein the compensation region includes at least one first pixel unit including 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;

12. The display control method according to claim 1, wherein the non-bending display region comprises at least a first non-bending sub-display region and a second non-bending sub-display region, and the first non-bending sub-display region and the second non-bending sub-display region are respectively located at two sides of the bendable display region;

an included angle between a plane where the first non-bending sub-display area is located and a plane where the second non-bending sub-display area is located is phi, and when phi is less than 180 degrees, the display control method further includes:

13. The method according to claim 12, wherein performing brightness compensation on the first non-bending sub-display region and/or the second non-bending sub-display region according to the reference viewing angle comprises:

obtaining a first reference viewing angle of the user's eyes relative to the first non-bent sub-display region;

obtaining a second reference viewing angle of the user's eye relative to the second non-bent sub-display region;

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.

14. A flexible display panel for performing the display control method according to any one of claims 1 to 13, wherein the flexible display panel comprises a display region, the display region comprises a bendable display region and a non-bendable display region, the bendable display region comprises a plurality of compensation regions, and the flexible display panel further comprises:

15. The flexible display panel of claim 14, wherein the actual viewing angle acquisition module comprises:

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

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

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

16. The flexible display panel according to claim 15, wherein the profile information acquisition unit includes any one of a stress sensor, an optical sensor, and an electrical sensor;

the spatial position information acquisition unit includes a camera.

17. The flexible display panel according to claim 16, further comprising a bendable non-display region adjacent to the bendable display region;

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

18. The flexible display panel according to claim 14, further comprising a brightness compensation information presetting module for presetting brightness compensation information, wherein the brightness compensation information comprises a correspondence between the actual viewing angle, the reference viewing angle and a brightness compensation value;

the brightness compensation module includes:

a brightness compensation value determining unit for determining 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 performing brightness compensation on the plurality of compensation areas according to the brightness compensation values.

19. A display device characterized by comprising the flexible display panel according to any one of claims 14 to 18.