Display compensation method and device for flexible display screen and display device

Abstract

The present invention discloses a display compensation method, device and display device of a flexible display screen. The display compensation method of the flexible display screen comprises: obtaining display-related parameters of the flexible display screen; wherein the display-related parameters include the angle between the line of sight and the flexible display screen, the number of folding times of the flexible display screen, the incident angle of ambient light on the flexible display screen and the brightness of the ambient light; obtaining a target compensation coefficient according to the display-related parameters; and compensating sub-pixels in a bending area of ​​the flexible display screen according to the target compensation coefficient to reduce the display difference between the bending area and the non-bending area of ​​the flexible display screen, thereby improving the crease problem of the flexible display screen and improving the display effect of the flexible display screen.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of display technology, and in particular to a display compensation method and device for a flexible display screen, and a display device. Background Art

[0002] Flexible displays are increasingly used in the design of portable devices due to their foldable and curlable features, making the products more portable and the designs more innovative.

[0003] At present, the display compensation method for improving the folding marks of flexible display screens is less effective, resulting in a large display difference between the bending area and the non-bending area of ​​the flexible display screen, which reduces the consumer experience of folding display products. Summary of the invention

[0004] The embodiments of the present invention provide a display compensation method and device for a flexible display screen, and a display device, so as to improve the crease problem of the flexible display screen and enhance the display effect of the flexible display screen.

[0005] According to one aspect of the present invention, a display compensation method for a flexible display screen is provided, comprising:

[0006] Acquire display-related parameters of the flexible display screen; wherein the display-related parameters include an angle between a line of sight and the flexible display screen, a number of folding times of the flexible display screen, an incident angle of ambient light on the flexible display screen, and brightness of the ambient light;

[0007] According to the display-related parameters, obtaining a target compensation coefficient;

[0008] The sub-pixels in the bending area of ​​the flexible display screen are compensated according to the target compensation coefficient to reduce the display difference between the bending area and the non-bending area of ​​the flexible display screen.

[0009] Optionally, before obtaining the display-related parameters of the flexible display screen, the method includes:

[0010] Acquire a facial image of the target object through an image acquisition module;

[0011] Analyzing and processing the facial image to determine the position of the eyes of the target object in the facial image and the pupil distance;

[0012] Determine, according to the position of the eyes of the target object in the facial image, a range of an angle between a line of sight and a vertical line of the flexible display screen;

[0013] According to the pupil distance of the target object in the facial image, the angle between the sight line and the flexible display screen is determined from the corresponding range interval.

[0014] Optionally, before obtaining the display-related parameters of the flexible display screen, the method further includes:

[0015] The folding counting module records the number of times the flexible display screen is unfolded after being folded or the number of times the flexible display screen is folded after being unfolded during actual use;

[0016] The number of folding times of the flexible display screen is determined according to the number of times the flexible display screen is unfolded after being folded or the number of times the flexible display screen is folded after being unfolded.

[0017] Optionally, an ambient light collection module is arranged outside the edge of the flexible display screen; the ambient light collection module includes two upper and lower photosensitive film layers, and the ambient light irradiates the entire light-receiving surface of the upper photosensitive film layer; along the projection direction of the ambient light, the upper photosensitive film layer forms a projection on the light-receiving surface of the lower photosensitive film layer, and the ambient light irradiates part of the light-receiving surface of the lower photosensitive film layer;

[0018] Determining an incident angle of ambient light on the flexible display screen includes:

[0019] Respectively detecting the current values ​​generated by the upper photosensitive film layer and the lower photosensitive film layer under the irradiation of ambient light;

[0020] The incident angle of the ambient light is determined according to the current values ​​of the upper photosensitive film layer and the lower photosensitive film layer, and the distance between the upper photosensitive film layer and the lower photosensitive film layer in a direction perpendicular to the flexible screen.

[0021] Optionally, acquiring a target compensation coefficient according to the display-related parameter includes:

[0022] According to the display-related parameters of the flexible display screen, a target compensation coefficient matched by each sub-pixel in the bending area is obtained from a compensation coefficient database; wherein the compensation coefficient database includes a plurality of parameter combinations, and for each sub-pixel in the bending area, each parameter combination corresponds to a compensation coefficient; the parameters in each parameter combination include a sight angle reference value, a folding number reference value, an ambient light incident angle reference value, and an ambient light brightness reference value; the compensation coefficient database has a plurality of sight angle reference values ​​at different gears, a plurality of folding number reference values ​​at different gears, a plurality of ambient light incident angle reference values ​​at different gears, and a plurality of ambient light brightness reference values ​​at different gears; the parameter combinations in the compensation coefficient database include all parameter combination methods;

[0023] Preferably, the display-related parameters further include the luminous color and / or grayscale of the sub-pixel in the bending area; the parameters in each parameter combination further include the luminous color information and / or grayscale reference value of the sub-pixel.

[0024] Optionally, according to the display-related parameters of the flexible display screen, a target compensation coefficient for matching each sub-pixel in the bending area is obtained from a compensation coefficient database, including:

[0025] Determine an upper limit value of the viewing angle of the user on the flexible display screen among the reference values ​​of the viewing angles at different levels;

[0026] Determine an upper limit value of the folding number of the flexible display screen among the reference values ​​of the folding number of different gears;

[0027] Determine an upper limit value of the ambient light incident angle among a plurality of ambient light incident angle reference values ​​at different gears;

[0028] Determine the upper limit value of the ambient light brightness level among the ambient light brightness reference values ​​at different levels;

[0029] The target compensation coefficient of each sub-pixel in the bending area is determined according to the upper limit value of the user's viewing angle on the flexible display screen, the upper limit value of the number of times the flexible display screen is folded, the upper limit value of the ambient light incident angle, and the upper limit value of the ambient light brightness.

[0030] Optionally, according to the compensation coefficient influencing parameter of the flexible screen, a target compensation coefficient matched by each sub-pixel in the bending area is obtained from a compensation coefficient database, including:

[0031] Determine a sight angle reference value that is closest to the viewing angle of the user on the flexible display screen among a plurality of sight angle reference values ​​at different gears;

[0032] Determine a folding number reference value that is closest to the folding number of the flexible display screen among the folding number reference values ​​of the multiple different gears;

[0033] Determine, among a plurality of ambient light incident angle reference values ​​at different gears, an ambient light incident angle reference value that is closest to the incident angle of the ambient light on the flexible display screen;

[0034] Determine an ambient light brightness reference value closest to the ambient light brightness among a plurality of ambient light brightness reference values ​​at different gears;

[0035] The target compensation coefficient of each sub-pixel in the bending area is determined according to the closest sight angle reference value, the closest folding number reference value, the closest ambient light incident angle reference value and the closest ambient light brightness reference value.

[0036] Optionally, compensating sub-pixels in a bending area of ​​the flexible display screen according to the target compensation coefficient includes:

[0037] Determining target display data of each sub-pixel according to original display data of each sub-pixel in the bending area and a target compensation coefficient corresponding to each sub-pixel;

[0038] Each sub-pixel in the bending area is controlled to display according to corresponding target display data.

[0039] According to another aspect of the present invention, a display compensation device for a flexible display screen is provided, comprising:

[0040] A parameter acquisition module, used to acquire display-related parameters of the flexible display screen; wherein the display-related parameters include an angle between a line of sight and the flexible display screen, a number of folding times of the flexible display screen, an incident angle of ambient light on the flexible display screen, and brightness of the ambient light;

[0041] A compensation coefficient acquisition module, used for acquiring a target compensation coefficient according to the display-related parameters;

[0042] The light emitting compensation module is used to compensate the sub-pixels in the bent portion of the flexible display screen according to the target compensation coefficient, so as to reduce the display difference between the bent area and the non-bent area of ​​the flexible display screen.

[0043] According to another aspect of the present invention, a display device is provided, characterized in that it comprises a flexible display screen, an image acquisition module, an ambient light acquisition module, a folding counting module and a display compensation device for a flexible display screen according to any embodiment of the present invention;

[0044] Among them, the image acquisition module is used to determine the viewing angle on the flexible display screen; the ambient light acquisition module is used to determine the brightness of the ambient light and the incident angle of the ambient light on the flexible display screen; the folding counting module is used to record the number of times the flexible display screen is unfolded after being folded during actual use.

[0045] The technical solution of the embodiment of the present invention adds detection of the incident angle and brightness of ambient light, detection of the viewing angle of the flexible display screen, and determination of the number of folding times of the flexible display screen during the display process of the flexible display screen, and optimizes the compensation effect of the flexible display screen according to the ambient light information, the angle between the line of sight and the display screen, and the number of folding times of the flexible display screen, thereby reducing the influence of ambient light, viewing angle and number of folding times on the crease of the display bending zone, thereby reducing the display difference between the bending zone and the non-bending zone of the flexible display screen, improving the crease problem of the flexible display screen, and improving the display effect of the flexible display screen.

[0046] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0048] Figure 1 is a partial schematic diagram of a flexible display screen provided by an embodiment of the present invention;

[0049] Figure 2 is a schematic diagram of the light path of ambient light at different positions in the bending area of ​​a flexible display screen provided by an embodiment of the present invention;

[0050] Figure 3 yes Figure 1 A schematic diagram of a curve showing how the screen brightness changes with position along the X direction of the structure shown;

[0051] Figure 4 is a flow chart of a display compensation method for a flexible display screen provided by an embodiment of the present invention;

[0052] Figure 5 is a schematic diagram of an incident angle of ambient light on a flexible display screen and an angle between a line of sight and the flexible display screen provided by an embodiment of the present invention;

[0053] Figure 6 is a flow chart of another display compensation method for a flexible display screen provided by an embodiment of the present invention;

[0054] Figure 7 is a structural schematic diagram of a display device provided by an embodiment of the present invention;

[0055] Figure 8 is a schematic diagram of a facial image collected at different viewing angles provided by an embodiment of the present invention;

[0056] Fig. 9 is a structural schematic diagram of an ambient light collection module provided by an embodiment of the present invention;

[0057] Fig.10 is a structural schematic diagram of another ambient light collection module provided by an embodiment of the present invention;

[0058] Fig.11 is a flow chart of another display compensation method for a flexible display screen provided by an embodiment of the present invention;

[0059] Fig.12 It is a structural block diagram of a display compensation device for a flexible display screen provided by an embodiment of the present invention;

[0060] Fig.13 It is a structural block diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0061] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0062] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0063] As the background technology, flexible display screens are more portable and more novel in design due to their foldable and curlable features, and are therefore increasingly widely used in the design of portable devices. Since the substrate and cover layers of flexible display screens are mostly made of PI (polyimide) materials, they are prone to plastic deformation after being folded many times. At this time, the bending area of ​​the flexible display screen will not be able to return to its original flat state when the screen is flat, resulting in folding marks on the flexible display screen, and the displayed image quality is affected.

[0064] The crease compensation method in the related art includes: performing image acquisition on the screen through an image acquisition device to obtain an image containing the screen; identifying the crease area of ​​the acquired image, and obtaining the adjacent area of ​​the crease area based on the crease area after identifying the crease area. Then, at least one of the crease area and the adjacent area is used as the target area for pixel value adjustment. The adjustment coefficient of the pixel value corresponding to the target area is obtained; and the pixel value of the target area is adjusted based on the adjustment coefficient to perform display compensation. However, this display compensation method has a poor effect, resulting in a poor display result after brightness compensation. The inventor of the present invention found that the scheme does not involve the detection of the incident angle and brightness of ambient light, and cannot solve the influence of ambient light on the crease. In addition, to collect the screen display effect through image acquisition, an additional retractable external camera (or a detachable external camera) is required to capture the display screen effect in a timely manner. The angle of capturing the display screen effect is relatively fixed, and it cannot imitate the multi-viewing angle of consumers using flexible folding products; at the same time, the influence of the number of folding times on the display screen effect is not considered.

[0065] Although the creases in the bending area of ​​the flexible display are shallow with the support of the existing support structure (such as hinge design), it is difficult for consumers to detect the existence of the creases in the display area from various larger viewing angles (such as an 85° angle between the line of sight and the vertical line of the center of the screen) in the case of weak ambient light or when the screen is lit in a dark room. However, in the case of strong ambient light (outdoor or indoor lighting conditions), the superposition of ambient light and light emitted by the flexible display will make the creases in the display area more obvious. The degree of the crease is related to the angle between the ambient light and the screen, as well as the angle between the line of sight and the screen.

[0066] Figure 1 is a partial schematic diagram of a flexible display screen provided by an embodiment of the present invention; Figure 2 is a schematic diagram of the optical path of ambient light at different positions in the bending area of ​​a flexible display screen provided by an embodiment of the present invention; Figure 1-2 Under the influence of ambient light A, the brightness of the front-lit area a increases due to the superposition of ambient light; the brightness of the backlight area b decreases because the ambient light A' cannot be reflected to the human eye through the screen; in this way, the upper part of the bending area is bright and the lower part is dark, making the crease obvious. Figure 3 yes Figure 1 The schematic diagram of the curve of the screen brightness changing with position along the X direction of the structure shown, refer to Figure 3 Under the influence of ambient light, the brightness of the screen changes with position, showing the characteristics of increasing brightness in the light-facing area and decreasing brightness in the backlight area. If the user's viewing angle remains unchanged, taking the incident direction of ambient light B as an example, the upper part of the bending area of ​​the screen becomes darker and the lower part becomes brighter. The curve of the screen brightness changing with position is similar to Figure 3On the contrary. Therefore, it is necessary to detect the ambient light incident angle and brightness, viewing angle and other display-related parameters, and then make corresponding compensation display for the bending area of ​​the screen according to these parameter information, so as to improve the crease in the bending area.

[0067] In view of this, an embodiment of the present invention provides a display compensation method for a flexible display screen. Figure 1 is a partial schematic diagram of a flexible display screen provided in the prior art, referring to Figure 1 , the display compensation method of the flexible display screen includes:

[0068] S110, obtaining display-related parameters of the flexible display screen; wherein the display-related parameters include an angle between a line of sight and the flexible display screen, a number of folding times of the flexible display screen, an incident angle of ambient light on the flexible display screen, and brightness of the ambient light.

[0069] Specifically, Figure 5 is a schematic diagram of an incident angle of ambient light on a flexible display screen and an angle between a line of sight and the flexible display screen provided by an embodiment of the present invention, with reference to Figure 5 In the process of using the flexible display screen, the actual use of the flexible display screen is considered, and the display-related parameters such as the incident angle α of the ambient light on the flexible display screen, the ambient light brightness L, the angle β between the line of sight and the flexible display screen, and the number of folding times N of the flexible display screen are obtained. The display-related parameters can be understood as the influencing parameters related to the display of the flexible display screen.

[0070] S120: Obtain a target compensation coefficient according to the display-related parameters.

[0071] Specifically, during the debugging stage of the product, the test product can be used to obtain in advance the compensation coefficients under different numerical combinations of α, L, β, and N. Because the test product and the mass-produced product have the same laminated structure, the test product will have the same creases after being folded the same number of times as the actual product. The compensation coefficient determined by the test product can be applied to mass-produced products. During user use, the mass-produced products do not require an external image acquisition device to perform real-time scanning of the crease morphology, which is convenient and easy to implement. After obtaining the compensation coefficients under different numerical combinations of α, L, β, and N, S120 specifically includes: obtaining the compensation coefficient corresponding to the display-related parameters from the compensation coefficients under different numerical combinations of α, L, β, and N, and the compensation coefficient is the target compensation coefficient.

[0072] S130 , compensating the sub-pixels in the bending area of ​​the flexible display screen according to the target compensation coefficient, so as to reduce the display difference between the bending area and the non-bending area of ​​the flexible display screen.

[0073] Specifically, the compensated display data is determined according to the original display data of the flexible display screen and the obtained target compensation coefficient. The compensated display data is sent to the flexible display screen as the target display data to control the screen to display according to the compensated display data. By adding the detection of the ambient light angle and brightness, the viewing angle detection of the flexible display screen, and the determination of the number of folding times of the flexible display screen during the display process of the flexible display screen, and optimizing the compensation effect according to the ambient light information, the angle between the line of sight and the display screen, and the number of folding times of the flexible display screen, the influence of ambient light, viewing angle, and the number of folding times on the crease of the display bending area can be reduced, thereby reducing the display difference between the bending area and the non-bending area of ​​the flexible display screen.

[0074] The display compensation method of the flexible display screen provided by the embodiment of the present invention includes: obtaining display-related parameters of the flexible display screen; wherein the display-related parameters include the angle between the line of sight and the flexible display screen, the number of folding times of the flexible display screen, the incident angle of ambient light on the flexible display screen, and the brightness of ambient light; obtaining a target compensation coefficient according to the display-related parameters; and compensating the sub-pixels in the bending area of ​​the flexible display screen according to the target compensation coefficient. By adding detection of the incident angle and brightness of ambient light, detection of the viewing angle of the flexible display screen, and determination of the number of folding times of the flexible display screen, and optimizing the compensation effect according to parameters such as ambient light information, the angle between the line of sight and the display screen, and the number of folding times of the flexible display screen, the influence of ambient light, viewing angle, and number of folding times on the crease of the display bending area is reduced, thereby reducing the display difference between the bending area and the non-bending area of ​​the flexible display screen.

[0075] Figure 6 is a flowchart of another display compensation method for a flexible display screen provided by an embodiment of the present invention, with reference to Figure 6 , the display compensation method of the flexible display screen includes:

[0076] S210, obtaining the viewing angle on the flexible display screen determined by the image acquisition module, the ambient light brightness and the incident angle of the ambient light on the flexible display screen determined by the ambient light acquisition module, and the number of folding times of the flexible display screen determined by the folding counting module.

[0077] Specifically, Figure 7 is a schematic diagram of a display device provided by an embodiment of the present invention, with reference to Figure 7, an ambient light acquisition module 200, an image acquisition module 300 and a folding counting module (not shown) may be provided in the display device. The image acquisition module 300 is used to determine the angle between the line of sight and the flexible display screen, the ambient light acquisition module 200 is used to determine the brightness of the ambient light and the incident angle of the ambient light on the flexible display screen, and the folding counting module is used to record the number of times the flexible display screen is unfolded after being folded or the number of times it is folded after being unfolded in actual use, thereby determining the number of times the flexible display screen is folded. After the display compensation device of the flexible display screen obtains display-related parameters such as the angle between the line of sight and the flexible display screen, the number of folds of the flexible display screen, the incident angle of the ambient light on the flexible display screen, and the brightness of the ambient light, display compensation is performed on the bending area of ​​the flexible display screen according to the display-related parameters to reduce the display difference between the bending area and the non-bending area.

[0078] Optionally, the image acquisition module determines the angle between the line of sight and the flexible display screen, including:

[0079] Acquire a facial image of the target object through an image acquisition module;

[0080] Analyzing and processing the facial image to determine the position of the eyes of the target object in the facial image and the pupil distance;

[0081] Determine, according to the position of the eyes of the target object in the facial image, a range of an angle between a line of sight and a vertical line of the flexible display screen;

[0082] According to the pupil distance of the target object in the facial image, the angle between the line of sight and the flexible display screen is determined from the corresponding range interval.

[0083] Specifically, the facial image of the target object is acquired through an image acquisition device. For example, the image acquisition device includes a front camera of a display device. The front camera of the flexible display screen timely acquires the facial image, analyzes and processes the facial image, and determines the position of the eyes of the target object in the facial image and the pupil distance; by determining the position of the eyes in the facial image and the pupil distance, the angle between the line of sight and the flexible display screen is determined. Figure 8 is a schematic diagram of a facial image collected at different viewing angles provided by an embodiment of the present invention, with reference to Figure 8, take the flexible display screen as an example, the flexible display screen is initially in a vertical state 25cm in front of the face, the middle position of the screen is flush with the eyes, and the camera is on the upper part of the flexible display screen. If the eye sight line is at a 45° angle to the screen normal (the angle between the sight line and the flexible display screen is 45°), the face and eyes captured by the camera are in the upper part of the entire captured image and occupy a larger area; the interpupillary distance is determined by the number of occupied sub-pixels and is also longer. If the eye sight line is at a 0° angle to the screen normal (the angle between the sight line and the flexible display screen is 90°), the face and eyes captured by the camera are in the middle of the entire captured image and occupy a centered area; the interpupillary distance is determined by the number of occupied sub-pixels and is also centered. If the eye sight line is at a -45° angle to the screen normal (the angle between the sight line and the flexible display screen is 135°), the face and eyes captured by the camera are in the lower part of the entire captured image and occupy a smaller area; the interpupillary distance is determined by the number of occupied pixels and is also shorter (the effect of near big and far small in camera imaging). In this way, the position of the eye on the screen can be used to determine whether the angle between the line of sight and the screen is an acute angle or an obtuse angle, and then the specific value of the angle between the line of sight and the flexible display screen can be determined according to the distance between the pupils in the image. In the process of determining the angle between the line of sight and the flexible display screen according to the distance between the pupils in the image, the specific angle between the line of sight and the screen can be obtained according to the ratio of the number of sub-pixels N included between the pupils in the image to the total number of sub-pixels M in a row of the entire acquisition screen, for example, N / M=0.3, corresponding to an angle of 45°. In the debugging stage of the product, the values ​​of N / M corresponding to different viewing angles are determined respectively to form a database, and then N / M is detected and obtained in actual applications, and the database is queried to obtain the corresponding angle. For example, the rotating display screen is set at multiple angles such as 5°, 15°, 45°, 90°, and 135° to record the values ​​of N / M respectively to form a database. Then N / M is detected and obtained in actual applications, and the database is queried to obtain the corresponding angle; it should be noted that each angle can correspond to a ratio or a ratio interval.

[0084] Optionally, the ambient light collection module determines the incident angle of the ambient light on the flexible display screen, including:

[0085] Respectively detecting the current values ​​generated by the upper photosensitive film layer and the lower photosensitive film layer under the irradiation of ambient light;

[0086] The incident angle of the ambient light is determined according to the current values ​​of the upper photosensitive film layer and the lower photosensitive film layer, and the distance between the upper photosensitive film layer and the lower photosensitive film layer in a direction perpendicular to the flexible screen.

[0087] Specifically, an ambient light collection module 200 is disposed outside the edge of the flexible display screen. Fig. 9 is a structural schematic diagram of an ambient light collection module provided by an embodiment of the present invention, Fig.10is a schematic diagram of the structure of another ambient light collection module provided by an embodiment of the present invention, referring to Figure 9-10 The ambient light collection module includes two layers of photosensitive film arranged in an upper and lower manner. The upper and lower photosensitive film layers are arranged in a specific manner as follows: the orthographic projections of the upper and lower photosensitive film layers in a direction perpendicular to the flexible display screen only partially overlap or do not overlap at all. The ambient light irradiates the entire light-receiving surface of the upper photosensitive film layer 12; along the projection direction of the ambient light, the upper photosensitive film layer 12 forms a projection in the light-receiving surface of the lower photosensitive film layer 11, and the ambient light irradiates part of the light-receiving surface of the lower photosensitive film layer 11; the ratio of the actual light-receiving area of ​​the upper photosensitive film layer 12 to the lower photosensitive film layer 11 is equal to the ratio of the actual irradiation length L2 of the ambient light in the upper photosensitive film layer 12 to the actual irradiation length L1 of the ambient light in the lower photosensitive film layer 11.

[0088] refer to Fig. 9 , the two photosensitive film layers are arranged in parallel, and the shapes and areas are equal. In the direction perpendicular to the light-receiving surface of the photosensitive device, there is an overlapping area between the upper photosensitive film layer 12 and the lower photosensitive film layer 11. The applicable formula is as follows:

[0089] S 1实际 / S2=K1*I1 / K2*I2=L 1实际 / L2;

[0090] Tanα=x / [L 重叠 -(L1-L 1实际 )];

[0091] Among them, S 1实际 is the current actual light-receiving area of ​​the lower photosensitive film layer 11; S2 is the light-receiving area of ​​the upper photosensitive film layer 12, and the light-receiving surface of the upper photosensitive film layer 12 is always in a fully illuminated state; K1 is the photosensitivity of the lower photosensitive film layer 11; K2 is the photosensitivity of the upper photosensitive film layer 12, and the photosensitivity of the two photosensitive film layers can be the same; I1 is the current value generated by the lower photosensitive film layer 11 under ambient light; I2 is the current value generated by the upper photosensitive film layer 12 under ambient light; L 1实际 L is the actual irradiation length of the incident light on the light-receiving surface of the lower photosensitive film layer 11, L1 is the theoretical irradiation length on the light-receiving surface of the lower photosensitive film layer 11 (the irradiation length when the light-receiving surface is in a fully illuminated state); L2 is the irradiation length of the incident light on the light-receiving surface of the upper photosensitive film layer 12; x is the vertical distance between the light-receiving surfaces of the two photosensitive film layers; α is the incident angle of the incident light; L 重叠 It is the overlapping length of two photosensitive film layers in the direction perpendicular to the light receiving surface.

[0092] In the formula, K1, K2, L1, L2, L 重叠 , x are the setting parameters of the photosensitive film layer, which are known quantities; I1 and I2 are the detected quantities, that is, the specific values ​​can be obtained; L1实际 It can be calculated based on I1 and I2. 1实际 Substitute into the formula Tanα=x / [L 重叠 -(L1-L 1实际 )], the incident angle α of the incident light can be calculated.

[0093] refer to Fig.10 , in the direction perpendicular to the light-receiving surface of the photosensitive film layer, the upper photosensitive film layer 12 and the lower photosensitive film layer 11 do not overlap, and the applicable formula is as follows:

[0094] S 1实际 / S2=K1*I1 / K2*I2=L 1实际 / L2;

[0095] Tanα=x / (L2+L 1实际 );

[0096] Among them, S 1实际 is the current actual light-receiving area of ​​the lower photosensitive film layer 11; S2 is the light-receiving area of ​​the upper photosensitive film layer 12, and the light-receiving surface of the upper photosensitive film layer 12 is always in a fully illuminated state; K1 is the photosensitivity of the lower photosensitive film layer 11; K2 is the photosensitivity of the upper photosensitive film layer 12, and the photosensitivity of the two photosensitive film layers can be the same; I1 is the current value generated by the lower photosensitive film layer 11 under ambient light; I2 is the current value generated by the upper photosensitive film layer 12 under ambient light; L 1实际 L is the actual irradiation length of the incident light on the light-receiving surface of the lower photosensitive film layer 11, L2 is the irradiation length of the incident light on the light-receiving surface of the upper photosensitive film layer 12; x is the vertical distance between the light-receiving surfaces of the two photosensitive film layers; α is the incident angle of the incident light.

[0097] In the formula, K1, K2, L1, L2, and x are the setting parameters of the photosensitive film layer, which are known quantities; I1 and I2 are the detected quantities, that is, the specific values ​​can also be obtained; L 1实际 It can be calculated based on I1 and I2. 1实际 Substitute into the formula Tanα=x / (L2+L 1实际 ), the incident angle α of the incident light can be calculated.

[0098] The ambient light collection module may also be other forms of devices or components that can collect the incident angle and brightness of ambient light.

[0099] Optionally, the folding counting module determines the number of folding times of the flexible display screen, including:

[0100] The folding counting module is used to record the number of times the flexible display screen is unfolded after being folded during actual use;

[0101] The number of folding times of the flexible display screen is determined according to the number of times the flexible display screen is unfolded after being folded.

[0102] Specifically, the number of times the flexible display screen is unfolded after being folded in actual use is recorded by the folding counting module. For example, a button for controlling the automatic opening of the screen is provided on the display device. Each time the folding counting module detects that the button is pressed, it counts once, thereby recording the number of times the flexible display screen is unfolded after being folded in actual use. Then, the number of folds of the flexible display screen from the initial state to the current state is determined according to the number of times the flexible display screen is unfolded after being folded. For example, the pressure value between the flexible display screen and the button can be detected by a pressure sensor, and when the pressure value exceeds the preset pressure, it counts once, thereby recording the number of times the flexible display screen is unfolded after being folded in actual use.

[0103] S220, taking the angle between the line of sight and the flexible display screen, the number of folding times of the flexible display screen, the incident angle of ambient light on the flexible display screen, and the brightness of the ambient light as display-related parameters; and obtaining a target compensation coefficient according to the angle between the line of sight and the flexible display screen, the number of folding times of the flexible display screen, the incident angle of ambient light on the flexible display screen, and the brightness of the ambient light.

[0104] S230 , compensating the sub-pixels in the bending area of ​​the flexible display screen according to the target compensation coefficient, so as to reduce the display difference between the bending area and the non-bending area of ​​the flexible display screen.

[0105] The display compensation method of the flexible display screen provided by the embodiment of the present invention uses the ambient light acquisition module to detect the ambient light angle and intensity, taking into account the gain part of the ambient light incident angle and brightness on the crease obviousness, and optimizing the crease improvement compensation algorithm under the influence of ambient light; uses the image acquisition module to detect the viewing angle of the human eye on the flexible display screen, taking into account the situation that the user observes the display screen from multiple viewing angles; uses the folding counting module to determine the number of folds of the flexible display screen, taking into account the degree of the crease of the flexible display screen and the impact on the display of the crease area. According to the parameters obtained in real time, a suitable compensation coefficient is obtained to achieve the purpose of real-time compensation.

[0106] Fig.11 is a flowchart of another display compensation method for a flexible display screen provided by an embodiment of the present invention, with reference to Fig.11 , the display compensation method of the flexible display screen includes:

[0107] S310, obtaining display-related parameters of the flexible display screen; wherein the display-related parameters include an angle between a line of sight and the flexible display screen, a number of folding times of the flexible display screen, an incident angle of ambient light on the flexible display screen, and brightness of the ambient light.

[0108] S320 , obtaining a target compensation coefficient for each sub-pixel in the bending area from a compensation coefficient database according to display-related parameters of the flexible display screen.

[0109] Specifically, the compensation coefficient database includes multiple parameter combinations, and for each sub-pixel in the bending zone, each parameter combination may correspond to a compensation coefficient. The parameters in each parameter combination include a sight angle reference value, a folding number reference value, an ambient light incident angle reference value, and an ambient light brightness reference value. The values ​​of at least one parameter among the sight angle reference value, the folding number reference value, the ambient light incident angle reference value, and the ambient light brightness reference value in different parameter combinations are different. The compensation coefficient database has sight angle reference values ​​for multiple different gears, folding number reference values ​​for multiple different gears, ambient light incident angle reference values ​​for multiple different gears, and ambient light brightness reference values ​​for multiple different gears; the parameter combinations in the compensation coefficient database include all parameter combinations. It should be noted that for the same parameter combination, the compensation coefficients corresponding to different sub-pixels in the bending zone may be the same or different, which is determined by the actual debugging results.

[0110] During the debugging phase of the product, one or several flexible display samples are used for testing to determine the compensation coefficient corresponding to each parameter combination. For example, after the sample is bent N = 5W times, the ambient light illumination L = 300Lx, the ambient light incident angle α = 45°, and the external image acquisition camera imitates the human eye observation angle β = 45° to collect the screen display test picture under a grayscale. The entire flexible display screen first displays the picture with the original display data, and then the camera at the human eye observation angle position shoots the display picture. According to the image of the captured display picture, the picture effect data displayed under the original display data is obtained. Then, according to the picture effect data, the mura information (range and degree) caused by the screen crease under the current conditions is identified, and the compensation coefficient of each sub-pixel under this parameter condition is calculated. After the original display data is loaded with the compensation coefficient, it is sent to the screen for display, and the external image acquisition camera takes a picture to obtain the display effect data of the compensated screen. According to the effect data of the display picture after the screen compensation, it is judged whether the crease mura is eliminated; if it is eliminated, the compensation coefficient is saved; otherwise, the picture is taken again and the compensation coefficient is calculated until the crease mura under the parameter condition is eliminated. The above process is repeated to determine the compensation coefficient of each sub-pixel in the bending area corresponding to each parameter combination.

[0111] Exemplarily, a set of sight angle reference values ​​for multiple different gears is:

[0112] β={15°,30°,45°,60°,75°,90°,105°,120°,135°,150°,165°};

[0113] The set of reference values ​​of the number of folding times for multiple different gears is:

[0114] N = {5W, 10W, 15W, 20W};

[0115] The set of reference values ​​of ambient light incident angles at different gears is:

[0116] α={15°,30°,45°,60°,75°,90°,105°,120°,135°,150°,165°};

[0117] The reference values ​​of ambient light brightness at different levels are as follows:

[0118] L={100Lx,200Lx,300Lx,400Lx,500Lx,600Lx}.

[0119] The above parameters are set in consideration of practical applications, and may also be conditional combinations of more or fewer parameters. After all the compensation coefficients corresponding to the various parameter combinations are obtained, the parameter combinations and the compensation coefficients corresponding to the parameter combinations are stored in a compensation coefficient database.

[0120] During the use of mass-produced folding products, the target compensation coefficient adapted for each sub-pixel is obtained from the compensation coefficient database based on the detected ambient light brightness L, ambient light incident angle α, human eye viewing angle β and the number of times the flexible display is folded N.

[0121] In one embodiment of the present invention, according to the display-related parameters of the flexible display screen, a target compensation coefficient for matching each sub-pixel in the bending area is obtained from a compensation coefficient database, including:

[0122] Determine an upper limit value of the viewing angle of the user on the flexible display screen among the reference values ​​of the viewing angles at different levels;

[0123] Determine an upper limit value of the folding number of the flexible display screen among the reference values ​​of the folding number of different gears;

[0124] Determine an upper limit value of the ambient light incident angle among a plurality of ambient light incident angle reference values ​​at different gears;

[0125] Determine the upper limit value of the ambient light brightness level among the ambient light brightness reference values ​​at different levels;

[0126] The target compensation coefficient of the sub-pixel in the bending area is determined according to the upper limit value of the user's viewing angle on the flexible display, the upper limit value of the number of folding times of the flexible display, the upper limit value of the ambient light incident angle and the upper limit value of the ambient light brightness.

[0127] Specifically, the corresponding reference values ​​in the database are upper limits of different gears. When the acquired α, L, β, and N are less than or equal to the threshold of the corresponding gear in actual use, the compensation coefficient obtained according to the upper limit of each parameter corresponding to the gear is used as the target compensation coefficient under the current parameter condition. Thus, the target compensation coefficient of other parameter combination conditions that have not been tested in the product debugging stage can be determined according to the parameter combination in the compensation coefficient database. Exemplarily, taking the reference values ​​of each parameter included in the database in the above embodiment as an example, when the flexible display screen is actually used, the detected ambient light brightness L=300Lx, the incident angle α=45°, the human eye viewing angle β=45°, and the number of folds N=5W. The parameter combination composed of these parameter values ​​belongs to the parameter combination tested in the product debugging stage, and the matching target compensation coefficient can be directly obtained from the compensation coefficient database. If the detected ambient light brightness L=180Lx, the incident angle α=20°, the human eye viewing angle β=20°, and the number of bends N=9W, the parameter combination composed of these parameter values ​​does not belong to the parameter combination tested in the product debugging stage. The compensation coefficient corresponding to the combination of ambient light brightness L=200Lx, incident angle β=30°, human eye viewing angle α=30°, and number of bends N=10W can be obtained from the compensation coefficient database.

[0128] In another embodiment of the present invention, according to the display-related parameters of the flexible display screen, a target compensation coefficient for matching each sub-pixel in the bending area is obtained from a compensation coefficient database, including:

[0129] Determine a sight angle reference value that is closest to the viewing angle of the user on the flexible display screen among a plurality of sight angle reference values ​​at different gears;

[0130] Determine a folding number reference value that is closest to the folding number of the flexible display screen among the folding number reference values ​​of the multiple different gears;

[0131] Determine, among a plurality of ambient light incident angle reference values ​​at different gears, an ambient light incident angle reference value that is closest to the incident angle of the ambient light on the flexible display screen;

[0132] Determine an ambient light brightness reference value closest to the ambient light brightness among a plurality of ambient light brightness reference values ​​at different gears;

[0133] The target compensation coefficient of the sub-pixel in the bending area is determined according to the closest sight angle reference value, the closest folding number reference value, the closest ambient light incident angle reference value and the closest ambient light brightness reference value.

[0134] Specifically, when the actually obtained α, L, β, and N are not equal to the corresponding reference values ​​in the database, the reference values ​​closest to the compensation database are used as the values ​​of each parameter. Exemplarily, the detected ambient light brightness L=180Lx, the incident angle α=20°, the human eye viewing angle β=20°, and the number of folds N=9W do not belong to the parameter combination tested in the product debugging stage. Referring to the set of parameters in the above embodiment, it can be seen that the ambient light brightness 180Lx is closest to the ambient light brightness reference value 200Lx in the compensation database; the ambient light incident angle 20° is closest to the ambient light incident angle reference value 15° in the compensation database; the human eye viewing angle 20° is closest to the sight angle reference value 15° in the compensation database; and the number of folds 9W is closest to the number of folds reference value 10W in the compensation database. Then, the compensation coefficient corresponding to the combination of ambient light brightness L=200Lx, incident angle α=15°, human eye viewing angle β=15°, and number of bends N=10W is obtained from the compensation coefficient database as the target compensation coefficient of the currently detected parameter condition. By determining the compensation coefficient of the sub-pixel in the bending area based on the closest line of sight angle reference value, the closest folding number reference value, the closest ambient light incident angle reference value, and the closest ambient light brightness reference value, the adaptability of the compensation coefficient under parameter combination conditions outside the compensation coefficient database can be improved, thereby further improving the compensation effect on the bending area of ​​the flexible display screen.

[0135] S330 , determining target display data of each sub-pixel in the bending area according to the original display data of each sub-pixel and the target compensation coefficient corresponding to each sub-pixel.

[0136] S340, controlling each sub-pixel in the bending area to display according to corresponding target display data.

[0137] Compensating the sub-pixels in the bending area of ​​the flexible display screen according to the target compensation coefficient includes: determining the target display data of each sub-pixel according to the original display data of each sub-pixel in the bending area and the target compensation coefficient corresponding to each sub-pixel; controlling each sub-pixel in the bending area to display according to the corresponding target display data, so as to achieve targeted compensation for each sub-pixel in the bending area, thereby further improving the compensation effect on the bending area of ​​the flexible display screen.

[0138] Optionally, the display-related parameters further include the luminous color and / or grayscale of the sub-pixel in the bending area; the parameters in each parameter combination further include the luminous color information and / or grayscale reference value of the sub-pixel.

[0139] Specifically, during the debugging stage of the product, when one or more flexible display screen samples are used for testing, different grayscale reference values ​​and / or luminous colors can also be set, so that the parameters in each parameter combination also include the luminous color information and / or grayscale reference value of the sub-pixel. For example, after the test sample is bent N = 5W times, the ambient light brightness L = 300Lx is set, and the incident angle of the ambient light on the screen α = 45°, and the external image acquisition camera is used to imitate the human eye observation angle β = 45° direction, and the screen displays different pure color images (such as red, green, blue, and white) at different grayscales (such as 32, 64, 96, 128, 160, 192, 224, and 255). That is, under the above-mentioned ambient light, viewing angle, and folding number parameter conditions, the red, green, blue, and white display images at grayscales of 32, 64, 96, 128, 160, 192, 224, and 255 are displayed in sequence.

[0140] Each time the screen is displayed, the entire flexible display screen first displays the screen with the original display data, and the camera at the human eye observation angle takes a photo of the display screen, and obtains the screen effect data displayed under the original display data according to the photographed display screen. Then, based on the above data, the crease mura information (range and degree) caused by the screen crease under the current conditions is identified, and the compensation coefficient of each sub-pixel under this condition is calculated. The original display data is loaded with the compensation coefficient and sent to the screen for display. The external image acquisition camera takes a photo to obtain the display effect data of the compensated screen. According to the effect data of the display screen after the screen compensation, it is judged whether the crease mura is eliminated; if eliminated, the compensation coefficient is saved; otherwise, the compensation coefficient is calculated again until the crease mura under the parameter condition is eliminated. Repeat the above process to determine the compensation coefficient of each sub-pixel in the bending area corresponding to each parameter combination.

[0141] During the use of mass-produced folding products, the original display data of the flexible display screen is obtained to determine the luminous color and display grayscale of each sub-pixel; and the current ambient light brightness L, ambient light incident angle α, human eye viewing angle β and the number of flexible display screen folding times N are obtained. According to the luminous color, display grayscale, ambient light brightness L, ambient light incident angle α, human eye viewing angle β and the number of flexible display screen folding times N, the target compensation coefficient matching each sub-pixel in the bending area is obtained from the compensation coefficient database. The acquisition method can adopt the acquisition method of the above embodiment, which will not be repeated here.

[0142] Among them, for display grayscale, all parameter combinations with the same conditions of luminous color, ambient light brightness L, ambient light incident angle α, human eye viewing angle β and flexible display screen folding number N can also be determined in the compensation coefficient database, and only the grayscale reference values ​​are different in these parameter combinations. According to the compensation coefficients corresponding to these determined parameter combinations, the compensation coefficient corresponding to any grayscale under the conditions of luminous color, ambient light brightness L, ambient light incident angle α, human eye viewing angle β and flexible display screen folding number N can be obtained by interpolation processing.

[0143] The embodiment of the present invention further provides a compensation device for a flexible display screen, which is used to execute the compensation method for a flexible display screen described in any of the above embodiments. Fig.12 is a structural block diagram of a display compensation device for a flexible display screen provided by an embodiment of the present invention, with reference to Fig.12 , the compensation device of the flexible display screen includes:

[0144] A parameter acquisition module 10 is used to acquire display-related parameters of the flexible display screen; wherein the display-related parameters include the angle between the line of sight and the flexible display screen, the number of folding times of the flexible display screen, the incident angle of ambient light on the flexible display screen, and the brightness of the ambient light;

[0145] A compensation coefficient acquisition module 20, used to acquire a compensation coefficient according to a display-related parameter target;

[0146] The light emitting compensation module 30 is used to compensate the sub-pixels in the bent portion of the flexible display screen according to the target compensation coefficient, so as to reduce the display difference between the bent area and the non-bent area of ​​the flexible display screen.

[0147] An embodiment of the present invention further provides a display device, Fig.13 is a structural block diagram of a display device provided by an embodiment of the present invention, with reference to Fig.13 and Figure 7 The display device includes a flexible display screen 600, an image acquisition module 300, an ambient light acquisition module 200, a folding counting module 400, and a display compensation device 100 for a flexible display screen as described in any of the above embodiments; wherein the image acquisition module 300 is used to determine the viewing angle on the flexible display screen 600; the ambient light acquisition module 200 is used to determine the brightness of the ambient light and the incident angle of the ambient light on the flexible display screen 600; and the folding counting module 400 is used to record the number of times the flexible display screen 600 is unfolded after being folded in actual use, so as to determine the number of folds of the flexible display screen 600. The display compensation device 100 for a flexible display screen can obtain a compensation coefficient from a compensation coefficient database 500 according to the acquired display-related parameters, and then compensate the sub-pixels in the bending portion of the flexible display screen 600 according to the compensation coefficient, so as to reduce the display difference between the bending area and the non-bending area of ​​the flexible display screen 600.

[0148] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display compensation method for a flexible display screen, characterized in that: include: Acquire display-related parameters of the flexible display screen; wherein the display-related parameters include an angle between a line of sight and the flexible display screen, a number of folding times of the flexible display screen, an incident angle of ambient light on the flexible display screen, and brightness of the ambient light; According to the display-related parameters, obtaining a target compensation coefficient; Compensating the sub-pixels in the bending area of ​​the flexible display screen according to the target compensation coefficient to reduce the display difference between the bending area and the non-bending area of ​​the flexible display screen; An ambient light collection module is arranged outside the edge of the flexible display screen; the ambient light collection module comprises two upper and lower photosensitive film layers, and the ambient light irradiates the entire light-receiving surface of the upper photosensitive film layer; along the projection direction of the ambient light, the upper photosensitive film layer forms a projection on the light-receiving surface of the lower photosensitive film layer, and the ambient light irradiates part of the light-receiving surface of the lower photosensitive film layer; Before obtaining the display-related parameters of the flexible display screen, the method further includes: Respectively detecting the current values ​​generated by the upper photosensitive film layer and the lower photosensitive film layer under the irradiation of ambient light; The incident angle of the ambient light is determined according to the current values ​​of the upper photosensitive film layer and the lower photosensitive film layer, and the distance between the upper photosensitive film layer and the lower photosensitive film layer in a direction perpendicular to the flexible screen.

2. The display compensation method of the flexible display screen according to claim 1, characterized in that: Before obtaining the display-related parameters of the flexible display screen, the method includes: Acquire a facial image of the target object through an image acquisition module; Analyzing and processing the facial image to determine the position of the eyes of the target object in the facial image and the pupil distance; Determine, according to the position of the eyes of the target object in the facial image, a range of an angle between a line of sight and a vertical line of the flexible display screen; According to the pupil distance of the target object in the facial image, the angle between the sight line and the flexible display screen is determined from the corresponding range interval.

3. The display compensation method of the flexible display screen according to claim 1, characterized in that: Before obtaining the display-related parameters of the flexible display screen, the method further includes: The folding counting module records the number of times the flexible display screen is unfolded after being folded or the number of times the flexible display screen is folded after being unfolded during actual use; The number of folding times of the flexible display screen is determined according to the number of times the flexible display screen is unfolded after being folded or the number of times the flexible display screen is folded after being unfolded.

4. The display compensation method of the flexible display screen according to claim 1, characterized in that: The step of obtaining a target compensation coefficient according to the display-related parameter includes: According to the display-related parameters of the flexible display screen, a target compensation coefficient matching each sub-pixel in the bending area is obtained from a compensation coefficient database; wherein the compensation coefficient database includes multiple parameter combinations, and for each sub-pixel in the bending area, each parameter combination corresponds to a compensation coefficient; the parameters in each parameter combination include a sight angle reference value, a folding number reference value, an ambient light incident angle reference value, and an ambient light brightness reference value; the compensation coefficient database has a sight angle reference value of multiple different gears, a folding number reference value of multiple different gears, a ambient light incident angle reference value of multiple different gears, and an ambient light brightness reference value of multiple different gears; the parameter combinations in the compensation coefficient database include all parameter combination methods.

5. The display compensation method for a flexible display screen according to claim 4, characterized in that: The display-related parameters also include the luminous color and / or grayscale of the sub-pixel in the bending area; the parameters in each parameter combination also include the luminous color information and / or grayscale reference value of the sub-pixel.

6. The display compensation method for a flexible display screen according to claim 5, characterized in that: According to the display-related parameters of the flexible display screen, a target compensation coefficient for each sub-pixel in the bending area is obtained from the compensation coefficient database, including: Determine an upper limit value of the viewing angle of the user on the flexible display screen among a plurality of reference values ​​of the viewing angle of different gears; Determine an upper limit value of the folding number of the flexible display screen among the reference values ​​of the folding number of different gears; Determine an upper limit value of the ambient light incident angle among a plurality of ambient light incident angle reference values ​​at different gears; Determine the upper limit value of the ambient light brightness level among the ambient light brightness reference values ​​at different levels; The target compensation coefficient of each sub-pixel in the bending area is determined according to the upper limit value of the user's viewing angle on the flexible display screen, the upper limit value of the number of times the flexible display screen is folded, the upper limit value of the ambient light incident angle, and the upper limit value of the ambient light brightness.

7. The display compensation method for a flexible display screen according to claim 5, characterized in that: According to the compensation coefficient influencing parameters of the flexible screen, the target compensation coefficient for each sub-pixel in the bending area is obtained from the compensation coefficient database, including: Determine a sight angle reference value that is closest to the viewing angle of the user on the flexible display screen among a plurality of sight angle reference values ​​at different gears; Determine a folding number reference value that is closest to the folding number of the flexible display screen among the folding number reference values ​​of the multiple different gears; Determine, among a plurality of ambient light incident angle reference values ​​at different gears, an ambient light incident angle reference value that is closest to the incident angle of the ambient light on the flexible display screen; Determine an ambient light brightness reference value closest to the ambient light brightness among a plurality of ambient light brightness reference values ​​at different gears; The target compensation coefficient of each sub-pixel in the bending area is determined according to the closest sight angle reference value, the closest folding number reference value, the closest ambient light incident angle reference value and the closest ambient light brightness reference value.

8. The display compensation method for a flexible display screen according to claim 1, characterized in that: Compensating the sub-pixels in the bending area of ​​the flexible display screen according to the target compensation coefficient includes: Determining target display data of each sub-pixel according to original display data of each sub-pixel in the bending area and a target compensation coefficient corresponding to each sub-pixel; Each sub-pixel in the bending area is controlled to display according to corresponding target display data.

9. A display compensation device for a flexible display screen, characterized in that: include: A parameter acquisition module, used to acquire display-related parameters of the flexible display screen; The display-related parameters include the angle between the line of sight and the flexible display screen, the number of folding times of the flexible display screen, the incident angle of ambient light on the flexible display screen, and the brightness of the ambient light; A compensation coefficient acquisition module, used for acquiring a target compensation coefficient according to the display-related parameters; A light emitting compensation module, used to compensate the sub-pixels in the bent portion of the flexible display screen according to the target compensation coefficient, so as to reduce the display difference between the bent area and the non-bent area of ​​the flexible display screen; An image acquisition module, used to determine the angle between the line of sight and the flexible display screen; An ambient light collection module, used to determine the brightness of the ambient light and the incident angle of the ambient light on the flexible display screen; A folding counting module, used to record the number of times the flexible display screen is unfolded after being folded or the number of times the flexible display screen is folded after being unfolded during actual use, so as to determine the number of folding times of the flexible display screen; The ambient light collection module determines the incident angle of ambient light on the flexible display screen, including: Respectively detecting the current values ​​generated by the upper photosensitive film layer and the lower photosensitive film layer under the irradiation of ambient light; The incident angle of the ambient light is determined according to the current values ​​of the upper photosensitive film layer and the lower photosensitive film layer, and the distance between the upper photosensitive film layer and the lower photosensitive film layer in a direction perpendicular to the flexible screen.

10. A display device, characterized in that: A display compensation device comprising a flexible display screen, an image acquisition module, an ambient light acquisition module, a folding counting module and the flexible display screen according to claim 9; Among them, the image acquisition module is used to determine the viewing angle on the flexible display screen; the ambient light acquisition module is used to determine the brightness of the ambient light and the incident angle of the ambient light on the flexible display screen; the folding counting module is used to record the number of times the flexible display screen is unfolded after being folded during actual use.

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