CN114113141B

CN114113141B - Display screen crease degree determining method and device

Info

Publication number: CN114113141B
Application number: CN202111431641.9A
Authority: CN
Inventors: 张仁伟
Original assignee: Hefei Visionox Technology Co Ltd
Current assignee: Hefei Visionox Technology Co Ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2024-05-24
Anticipated expiration: 2041-11-29
Also published as: CN114113141A

Abstract

The application relates to a method and a device for determining crease degree of a display screen. The method comprises the following steps: acquiring brightness values and chromaticity values of a plurality of test points when a display screen presents the same image, wherein the distribution area of the plurality of test points comprises a bendable area of the display screen; determining a maximum luminance difference and a maximum chrominance difference of the display screen based on the luminance value and the chrominance value; and determining the crease degree of the bendable region based on the maximum brightness difference and the maximum chromaticity difference of the display screen. The method can determine the crease degree of the display screen, so that the corresponding relation between the bending times of the display screen and the crease degree of the bending area can be established, and the situation that a user does not feel the existence of the crease before the bending times reach the set times is ensured.

Description

Display screen crease degree determining method and device

Technical Field

The application relates to the technical field of display, in particular to a method and a device for determining crease degree of a display screen.

Background

With the development of AMOLED (Active Matrix Organic LIGHT EMITTING Diode) technology, an OLED (Organic LIGHT EMITTING Diode) display screen is shifted from a hard screen substrate to a PI (Polyimide) flexible substrate. The OLED display screen adopting the PI flexible substrate has flexibility and can be folded and curled.

After the OLED display screen is bent for many times, folds can appear in the bending area. And as the number of bends increases, the folds deepen.

However, there is currently a lack of suitable crease quantification methods, and the crease degree of the bending region cannot be estimated.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a method, an apparatus, a computer device, and a storage medium for determining a degree of folding of a display screen, which are capable of quantifying folding.

A method for determining a crease level of a display screen, the method comprising:

acquiring brightness values and chromaticity values of a plurality of test points when a display screen presents the same image, wherein the distribution area of the plurality of test points comprises a bendable area of the display screen;

Determining a maximum luminance difference and a maximum chrominance difference of the display screen based on the luminance value and the chrominance value;

and determining the crease degree of the bendable region based on the maximum brightness difference and the maximum chromaticity difference of the display screen.

According to the display screen crease degree determining method, the brightness value and the chromaticity value of the plurality of test points when the display screen presents the same image are obtained, the distribution area of the plurality of test points comprises the bendable area of the display screen, and the difference of the bendable area of the display screen in brightness and chromaticity can be known. The display screen is flat before bending, the distribution area of the bendable area is small, and the brightness value and the chromaticity value of the display screen when presenting the same image are theoretically the same. However, after the display screen is bent, the bendable region may have wrinkles, resulting in a change in viewing angle, resulting in a change in the direction of light emitted from the display screen, and the brightness and chromaticity of the display screen are different from those of the original display screen. The method comprises the steps of firstly determining the maximum brightness difference and the maximum chromaticity difference of a display screen based on brightness values and chromaticity values of a plurality of test points when the display screen presents the same image, and then determining the crease degree of a bendable region based on the maximum brightness difference and the maximum chromaticity difference of the display screen. The method has the advantages that the crease degree of the bendable region is determined by utilizing the maximum difference of the brightness and the chromaticity of the display screen, the influence of the crease on the display image of the display screen can be well reflected, the crease degree of the bendable region is accurately estimated, and the corresponding relation between the bending times of the display screen and the crease degree of the bending region can be established, so that the user cannot feel the existence of the crease before the bending times reach the set times.

In one embodiment, the plurality of test points form at least one test combination, and test points in the same test combination are arranged at intervals along a first direction, and the first direction forms an included angle with a crease direction of the display screen.

The test points in the same test combination are arranged at intervals along the first direction, the first direction forms an included angle with the crease direction of the display screen, so that the brightness value and the chromaticity value of each area on the display screen, which are affected by the bending of the display screen, can be obtained, the situation that the display screen is affected by the bending of the display screen can be accurately known, and the crease degree of the display screen can be accurately determined.

In one embodiment, the determining the maximum luminance difference and the maximum chrominance difference of the display screen based on the luminance value and the chrominance value includes:

Determining a maximum luminance difference and a maximum chrominance difference for each test combination based on the luminance value and the chrominance value;

When the test combination is a plurality of, determining the maximum value of the maximum brightness differences of the test combination as the maximum brightness difference of the display screen, and determining the maximum value of the maximum chromaticity differences of the test combination as the maximum chromaticity difference of the display screen;

When the test combination is one, determining that the maximum brightness difference of the test combination is the maximum brightness difference of the display screen, and determining that the maximum chromaticity difference of the test combination is the maximum chromaticity difference of the display screen.

When only one test combination is provided, the maximum brightness difference of the test combination is the maximum brightness difference of the display screen; and testing the maximum chromaticity difference of the combination, namely, the maximum chromaticity difference of the display screen. When a plurality of test points form a test combination, the maximum brightness difference of the test combination is the maximum brightness difference of the display screen; and testing the maximum chromaticity difference of the combination, namely, the maximum chromaticity difference of the display screen.

In one embodiment, the determining the maximum luminance difference and the maximum chrominance difference for each test combination based on the luminance value and the chrominance value includes:

In the same test combination, determining the brightness difference between every two test points, and determining the maximum value of the brightness differences as the maximum brightness difference of the test combination;

In the same test combination, the chromaticity difference between every two test points is determined, and the maximum value of the chromaticity differences is determined as the maximum chromaticity difference of the test combination.

Obtaining the maximum brightness difference of the test combination by determining the brightness difference between every two test points; and obtaining the maximum chromaticity difference of the test combination by determining the chromaticity difference between every two test points.

In one embodiment, the determining the crease degree of the bendable region based on the maximum brightness difference and the maximum chromaticity difference of the display screen includes:

The crease degree phi of the bendable region is determined by adopting the following formula:

φ＝k1*ΔL+k4*Δxy；

Wherein k1 is a correlation coefficient between a maximum luminance difference of the display screen and a crease degree of the bendable region, Δl is a maximum luminance difference of the display screen, k4 is a correlation coefficient between a maximum chromaticity difference of the display screen and a crease degree of the bendable region, and Δxy is a maximum chromaticity difference of the display screen.

And multiplying and summing the maximum brightness difference and the maximum chromaticity difference of the display screen with the corresponding correlation coefficients to obtain the crease degree of the bendable region.

In one embodiment, in the same test combination, the most middle test point is located on a central line of the bendable region extending along the crease direction of the display screen, and the test points except for the most middle test point are arranged symmetrically with respect to the center of the most middle test point.

In the same test combination, the most middle test point is positioned on the central line of the bendable region extending along the crease direction of the display screen, and the test points except the most middle test point are centrosymmetric relative to the most middle test point, so that the brightness value and the chromaticity value of each region of the display screen from large to small under the influence of the display screen bending can be obtained, the condition that the display screen is influenced by the display screen bending can be more accurately known, and the crease degree of the display screen can be accurately determined.

In one embodiment, the test combination maximum chromaticity difference comprises a first maximum chromaticity difference and a second maximum chromaticity difference; the determining a maximum luminance difference and a maximum chrominance difference for each test combination based on the luminance value and the chrominance value comprises:

In the same test combination, determining brightness differences between the most middle test point and each test point except for the most middle test point, and determining the maximum value in the brightness differences as the maximum brightness difference of the test combination;

in the same test combination, determining a first chromaticity difference between the most middle test point and each test point except the most middle test point, and determining the maximum value in the first chromaticity differences as the first maximum chromaticity difference of the test combination;

In the same test combination, determining a second chromaticity difference between two test points which are arranged in each center symmetry, and determining the maximum value in the second chromaticity difference as the second maximum chromaticity difference of the test combination.

The most middle test point is positioned on a central line extending along the crease direction of the display screen, the area where the central line is positioned is most influenced by the display screen bending, the chromaticity difference between other test points and the most middle test point is determined by taking the most middle test point as a reference, the chromaticity difference of the bendable area can be accurately determined, and the calculated amount is less.

In one embodiment, the maximum chromaticity difference of the display screen includes a first maximum chromaticity difference determined based on the first maximum chromaticity difference of the test combination and a second maximum chromaticity difference determined based on the second maximum chromaticity difference of the test combination;

the determining the crease degree of the bendable region based on the maximum brightness difference and the maximum chromaticity difference of the display screen comprises the following steps:

φ＝k1*ΔL+k2*Δxy1+k3*Δxy2；

Wherein k1 is a correlation coefficient between a maximum luminance difference of the display screen and a crease degree of the bendable region, Δl is a correlation coefficient between a first maximum chromaticity difference of the display screen and a crease degree of the bendable region, Δxy1 is a correlation coefficient between a first maximum chromaticity difference of the display screen, k3 is a correlation coefficient between a second maximum chromaticity difference of the display screen and a crease degree of the bendable region, and Δxy2 is a second maximum chromaticity difference of the display screen.

And multiplying and summing the maximum brightness difference and the two maximum chromaticity differences of the display screen with corresponding correlation coefficients to obtain the crease degree of the bendable region.

In one embodiment, the distribution area of the plurality of test points further includes an adjacent area adjacent to the bendable region.

The distribution areas of the plurality of test points simultaneously comprise bendable areas and adjacent areas, so that differences of the bendable areas and the adjacent areas in brightness and chromaticity can be accurately determined, and the crease degree of the bendable areas can be accurately estimated.

A display screen fold degree determining apparatus, the apparatus comprising:

The device comprises an acquisition module, a display screen and a display screen, wherein the acquisition module is used for acquiring brightness values and chromaticity values of a plurality of test points when the display screen presents the same image, and a distribution area of the plurality of test points comprises a bendable area of the display screen;

the difference value determining module is used for determining the maximum brightness difference and the maximum chromaticity difference of the display screen based on the brightness value and the chromaticity value;

And the degree determining module is used for determining the crease degree of the bendable region based on the maximum brightness difference and the maximum chromaticity difference of the display screen.

According to the display screen crease degree determining device, the brightness value and the chromaticity value of the plurality of test points when the display screen presents the same image are obtained, the distribution area of the plurality of test points comprises the bendable area of the display screen, and the difference of the bendable area of the display screen in brightness and chromaticity can be known. The display screen is flat before bending, the distribution area of the bendable area is small, and the brightness value and the chromaticity value of the display screen when presenting the same image are theoretically the same. However, after the display screen is bent, the bendable region may have wrinkles, resulting in a change in viewing angle, resulting in a change in the direction of light emitted from the display screen, and the brightness and chromaticity of the display screen are different from those of the original display screen. The method comprises the steps of firstly determining the maximum brightness difference and the maximum chromaticity difference of a display screen based on brightness values and chromaticity values of a plurality of test points when the display screen presents the same image, and then determining the crease degree of a bendable region based on the maximum brightness difference and the maximum chromaticity difference of the display screen. The method has the advantages that the crease degree of the bendable region is determined by utilizing the maximum difference of the brightness and the chromaticity of the display screen, the influence of the crease on the display image of the display screen can be well reflected, the crease degree of the bendable region is accurately estimated, and the corresponding relation between the bending times of the display screen and the crease degree of the bending region can be established, so that the user cannot feel the existence of the crease before the bending times reach the set times.

Drawings

FIG. 1 is an application environment diagram of a method for determining a crease level of a display screen in one embodiment;

FIG. 2 is an application environment diagram of a method for determining a crease level of a display screen according to another embodiment;

FIG. 3 is a view showing an application environment of a method for determining a crease degree of a display screen according to still another embodiment;

FIG. 4 is a flow chart of a method for determining a crease level of a display screen according to an embodiment;

FIG. 5 is a schematic view of crease distribution locations in one embodiment;

FIG. 6 is a flowchart of a method for determining a crease level of a display screen according to another embodiment;

FIG. 7 is a schematic diagram of test point distribution locations in one embodiment;

FIG. 8 is a flow chart of a method for determining a crease level of a display screen according to yet another embodiment;

FIG. 9 is a flowchart of a method for determining a crease level of a display screen according to still another embodiment;

FIG. 10 is a schematic diagram of test point distribution locations in another embodiment;

FIG. 11 is a block diagram showing a structure of a display screen fold degree determining apparatus in one embodiment;

Fig. 12 is an internal structural diagram of a computer device in one embodiment.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

The method for determining the crease degree of the display screen can be applied to application environments shown in fig. 1 to 3. The display 104 of the terminal 102 has flexibility, and may be folded in half along a center line extending in a transverse direction of the terminal 102 (as shown in fig. 1), folded in half along a center line extending in a longitudinal direction of the terminal 102 (as shown in fig. 2), and folded in half along a plurality of straight lines parallel to the same edge line of the terminal 102 (as shown in fig. 3). The area of the display 104 where the bending occurs will be creased after multiple folds. As the number of folds increases, folds become more and more visible, affecting the user's use. In order to ensure the use effect of the user, the crease on the display screen 104 needs to be quantized, and the crease degree of the bending area of the display screen 104 is determined, so that the corresponding relation between the bending times of the display screen and the crease degree of the bending area can be established, and the user is ensured not to feel the existence of the crease before the bending times reach the set times.

Specifically, brightness values and chromaticity values of a plurality of test points when the display screen presents the same image are obtained, and a distribution area of the plurality of test points comprises a bendable area of the display screen; determining a maximum luminance difference and a maximum chrominance difference of the display screen based on the luminance value and the chrominance value; and determining the crease degree of the bendable region based on the maximum brightness difference and the maximum chromaticity difference of the display screen.

The terminal 102 may be, but not limited to, various personal computers, notebook computers, smart phones, tablet computers, and portable wearable devices, and the display screen 104 may be an OLED display screen using a PI flexible substrate.

In one embodiment, as shown in fig. 4, there is provided a method for determining a crease degree of a display screen, including the steps of:

Step S402, obtaining brightness values and chromaticity values of a plurality of test points when the display screen presents the same image.

The distribution area of the plurality of test points comprises a bendable area of the display screen.

Each test point corresponds to an area on the display screen, and different test points are different in the corresponding areas on the display screen. The luminance value of the test point is the luminance average value of the corresponding area, and the chrominance value of the test point is the chrominance average value of the corresponding area.

Illustratively, the distributed region of the plurality of test points further includes an adjacent region adjacent to the pliable region.

The bendable region is a region for bending the display screen, and folds can appear in the bendable region after the display screen is bent for a plurality of times. The adjacent region is a region adjacent to the bendable region, specifically, a part of the boundary line of the adjacent region coincides with a part of the boundary line of the bendable region, and the adjacent region does not have a crease after the display screen is bent a plurality of times.

In practical application, the bendable region is a pre-designed region, and the distribution position of the bendable region on the display screen can be determined directly according to the design of the display screen. The length of the adjacent region on the line perpendicular to the overlapping boundary can be set in advance according to the detection requirement. Thus, after the determination of the bendable region is completed, the adjacent region can be determined accordingly.

For example, as shown in fig. 5, the display 104 is folded in half along a center line, and the strip-shaped areas symmetrically disposed on both sides of the center line are the bendable areas 106 of the display 104, and the strip-shaped areas symmetrically disposed on both sides of the bendable areas 106 are the adjacent areas 108.

Specifically, the test device may detect at least the luminance value and the chrominance value of the bendable region 106 and the adjacent region 108 when the display screen 104 presents a certain image, and then obtain the luminance values of the plurality of test points from the luminance values of the bendable region 106 and the adjacent region 108 according to the positions of the plurality of test points on the bendable region 106 and the adjacent region 108, and obtain the chrominance values of the plurality of test points from the chrominance values of the bendable region 106 and the adjacent region 108.

The test device may include at least one of a luminance tester, a colorimeter, and an image photographing device, for example.

In this embodiment, the bendable region 106 is adjacent to the adjacent region 108, and when the display screen presents the same image, the luminance values of the test points in the bendable region 106 are theoretically the same as the luminance values of the test points in the adjacent region 108, and the chrominance values of the test points in the bendable region 106 are also theoretically the same as the chrominance values of the test points in the adjacent region 108. However, the fold may cause a change in the viewing angle, the foldable area 106 may be folded after the display screen 104 is folded multiple times, and the adjacent area 108 may not be folded after the display screen 104 is folded multiple times, so that the luminance value of the test point in the foldable area 106 is actually different from the luminance value of the test point in the adjacent area 108, and the chromaticity value of the test point in the foldable area 106 is also actually different from the chromaticity value of the test point in the adjacent area 108. By obtaining the luminance value and the chromaticity value of the test points in the bendable region 106 and the adjacent region 108 and determining the difference between the luminance and the chromaticity of the bendable region 106 and the adjacent region 108, the crease degree of the bendable region 106 can be accurately determined.

Step S404, based on the brightness value and the chromaticity value, determining the maximum brightness difference and the maximum chromaticity difference of the display screen.

Any two test points in the plurality of test points can form a calculation object. And obtaining the absolute value of the brightness difference between the two test points in one calculation object based on the brightness values of the two test points in the calculation object. The maximum luminance value of the display screen may be the maximum value of the absolute values of the luminance differences obtained by all the calculation objects, or the maximum value of the absolute values of the luminance differences obtained by some of the calculation objects.

Similarly, the absolute value of the chromaticity difference between two test points in one calculation object is obtained based on the chromaticity values of the two test points in the calculation object. The maximum chromaticity difference of the display screen may be the maximum value of the chromaticity difference absolute values obtained by all the calculation objects, or the maximum value of the chromaticity difference absolute values obtained by some of the calculation objects.

For example, the plurality of test points includes test point A, test point B, test point C, test point D, and test point E.

If all the calculation objects are selected, the maximum brightness difference of the display screen may be the maximum value of the brightness difference absolute value of the test point A and the test point B, the brightness difference absolute value of the test point A and the test point C, the brightness difference absolute value of the test point A and the test point E, the brightness difference absolute value of the test point B and the test point C, the brightness difference absolute value of the test point B and the test point D, the brightness difference absolute value of the test point B and the test point E, the brightness difference absolute value of the test point C and the test point D, the brightness difference absolute value of the test point C and the test point E, and the brightness difference absolute value of the test point D and the test point E. The maximum chromaticity difference of the display screen may be the maximum value of the chromaticity difference between the test point a and the test point B, the chromaticity difference absolute value between the test point a and the test point C, the chromaticity difference absolute value between the test point a and the test point D, the chromaticity difference absolute value between the test point B and the test point C, the chromaticity difference absolute value between the test point B and the test point D, the chromaticity difference absolute value between the test point B and the test point E, the chromaticity difference absolute value between the test point C and the test point D, the chromaticity difference absolute value between the test point C and the test point E, and the chromaticity difference absolute value between the test point D and the test point E.

If a part of the test objects are selected, the maximum brightness difference of the display screen can be the maximum value of the brightness difference absolute values of the test points A and C, the brightness difference absolute values of the test points B and C, the brightness difference absolute values of the test points C and D and the brightness difference absolute values of the test points C and E. The maximum chromaticity difference of the display screen may be the maximum value of the absolute value of the luminance difference between the test point a and the test point C, the absolute value of the luminance difference between the test point B and the test point C, the absolute value of the chromaticity difference between the test point C and the test point D, and the absolute value of the chromaticity difference between the test point C and the test point E, or the maximum value of the absolute value of the chromaticity difference between the test point a and the test point E, and the absolute value of the chromaticity difference between the test point B and the test point D.

Specifically, firstly, based on the brightness values of a plurality of test points when the display screen presents the same image, determining the absolute value of the brightness difference between the selected test points, and then selecting the maximum value from the determined absolute value of the brightness difference as the maximum brightness difference of the display screen. Similarly, the absolute value of the chromaticity difference between the selected test points is determined based on the chromaticity values of the plurality of test points when the display screen presents the same image, and then the maximum value is selected from the determined absolute value of the chromaticity difference as the maximum chromaticity difference of the display screen.

Step S406, determining the crease degree of the bendable region based on the maximum brightness difference and the maximum chromaticity difference of the display screen.

The crease degree is a parameter for measuring the crease depth, and the influence of the crease on the consistency of the display screen presentation image can be quantified.

Specifically, a relational expression between the maximum brightness difference and the maximum chromaticity difference and the crease degree is obtained, and then the maximum brightness difference and the maximum chromaticity difference of the display screen are substituted into the relational expression, so that the crease degree of the bendable region can be obtained.

According to the method for determining the crease degree of the display screen, the brightness value and the chromaticity value of the plurality of test points when the display screen presents the same image are obtained, the distribution area of the plurality of test points comprises the bendable area of the display screen, and the difference of the bendable area of the display screen in brightness and chromaticity can be known. The display screen is flat before bending, the distribution area of the bendable area is small, and the brightness value and the chromaticity value of the display screen when presenting the same image are theoretically the same. However, after the display screen is bent, the bendable region may have wrinkles, resulting in a change in viewing angle, resulting in a change in the direction of light emitted from the display screen, and the brightness and chromaticity of the display screen are different from those of the original display screen. The method comprises the steps of firstly determining the maximum brightness difference and the maximum chromaticity difference of a display screen based on brightness values and chromaticity values of a plurality of test points when the display screen presents the same image, and then determining the crease degree of a bendable region based on the maximum brightness difference and the maximum chromaticity difference of the display screen. The maximum difference of the brightness and the chromaticity of the display screen is utilized to determine the crease degree of the bendable region, the influence of the crease on the display image of the display screen can be well reflected, the crease degree of the bendable region is accurately estimated, and then the corresponding relation between the bending times of the display screen and the crease degree of the bending region can be established, so that the user can be ensured not to feel the existence of the crease before the bending times reach the set times.

In one embodiment, the step S402 includes: acquiring a photo of a display screen when presenting an image; performing edge extraction on the photo, and intercepting a display screen image from the photo based on an edge extraction result; and acquiring brightness values and chromaticity values of the plurality of test points from the display screen image based on the distribution positions of the plurality of test points in the display screen.

In practical application, the area of the area where the test point is located is small, and it is difficult to shoot only the area where the test point is located, so that the luminance value and the chrominance value of the test point cannot be directly obtained. According to the embodiment, by acquiring the photo of the whole display screen when presenting a certain image, the position of the edge of the display screen can be determined in the photo by utilizing the difference between the display screen and the surrounding environment and adopting an edge extraction algorithm, the display screen image is intercepted from the photo based on the position of the edge of the display screen in the photo, and then each test point can be found in the display screen image based on the distribution positions of a plurality of test points in the display screen, so that the brightness value and the chromaticity value of the test point are obtained.

Specifically, the distance between the photographing apparatus of the photograph and the display screen is a set distance to ensure that the photographing apparatus can photograph the whole body photograph of the display screen.

The projection of the photographing center of the photographing apparatus onto the display screen is illustratively coincident with the center of the bendable region. The shooting equipment shoots just right to the center of the bendable area, and is beneficial to shooting the whole body of the display screen.

In one embodiment, as shown in fig. 6, there is provided a method for determining a crease degree of a display screen, including the steps of:

Step S602, obtaining brightness values and chromaticity values of a plurality of test points when the display screen presents the same image.

The distribution area of the plurality of test points comprises a bendable area of the display screen. Illustratively, the distributed region of the plurality of test points further includes an adjacent region adjacent to the pliable region.

In this embodiment, as shown in fig. 7, a plurality of test points 100 form a test combination, and test points 100 in the same test combination are arranged at intervals along a first direction (indicated by an arrow in fig. 7), and the first direction forms an included angle with a crease direction of the display screen 104. For example, the first direction may form an angle of 30 °, 60 °, and 90 ° with respect to the crease direction of the display screen 104, and in this embodiment, the angle of 90 ° is taken as an example for illustration, that is, the first direction is perpendicular to the crease direction of the display screen 104.

In the same test combination, the center-most test point 100 is located on a center line (indicated by a broken line in fig. 7) in which the bendable region 106 extends in the crease direction of the display screen 104, and the test points 100 other than the center-most test point 100 are arranged centrally and symmetrically with respect to the center-most test point 100. At this time, the number of the plurality of test points 100 is an odd number, such as 3, 5, 7, etc.

Illustratively, test points 100 in the test combination are located on a midline extending in a second direction that is perpendicular to the crease direction of display screen 104.

In practical applications, the bendable region 106 is generally a strip-shaped region, and the length direction of the strip-shaped region is the crease direction of the display screen 104, and the bendable region 106 penetrates the display screen 104 along the length direction of the strip-shaped region. Typically, the area of the center line of the display 104 extending along the crease direction is most affected by the bending of the display 104, and the influence of the bending of the display 104 on the display 104 decreases gradually in the direction away from this center line.

The test points 100 in the same test combination are arranged at intervals along the first direction, and the first direction forms an included angle with the crease direction of the display screen 104, so that the brightness value and the chromaticity value of each area on the display screen 104, which are affected by the bending of the display screen 104, can be obtained, the situation that the display screen 104 is affected by the bending of the display screen 104 can be accurately known, and the crease degree of the display screen 104 can be accurately determined.

In the same test combination, the most middle test point 100 is located on the central line of the bendable region 106 extending along the crease direction of the display screen 104, and the test points 100 except for the most middle test point 100 are centrosymmetric with respect to the most middle test point 100, so that the brightness value and the chromaticity value of each region of the display screen 104, which are affected by the crease of the display screen 104 from large to small, can be obtained, the situation that the display screen 104 is affected by the crease of the display screen 104 can be more accurately known, and the crease degree of the display screen 104 can be accurately determined.

Illustratively, in the same test combination, the distance between two adjacent test points 100 in the bendable region 106 is less than the distance between two adjacent test points 100 in the adjacent region 108.

For example, the length of the bendable region 106 in the second direction is L, the distance between two adjacent test points 100 in the bendable region 106 is L/4, and the distance between two adjacent test points 100 in the adjacent region 108 is L/2. Thus, five test points 100 are located in the bendable region 106 and are spaced apart from the center line of the display 104 extending in the direction of the crease of the display 104 by L/2, L/4, 0, L/4, and L/2, respectively. At least two test points 100 are located in adjacent areas 108, wherein the distance between the two test points 100 closest to the bendable region 106 and a center line of the display 104 extending in the crease direction of the display 104 is L.

In other embodiments, the test points 100 in the same test combination are uniformly arranged along the second direction, and the distance between two adjacent test points 100 is a constant value.

For example, the width of the bendable region 106 is L and the spacing between adjacent test points 100 is L/4. Thus, five test points 100 are located in the bendable region 106 and are spaced apart from the center line of the display 104 extending in the direction of the crease of the display 104 by L/2, L/4, 0, L/4, and L/2, respectively. At least two test points 100 are located in the adjacent area 108, wherein the distance between the two test points 100 closest to the bendable area 106 and a central line of the display 104 extending along the crease direction of the display 104 is l×3/4, respectively.

As another example, as shown in FIG. 7, the width of the bendable region 106 is L and the spacing between two adjacent test points 100 is L/2. Thus, there are three test points 100 in the bendable region 106, and the distances between the test points and the center line of the display screen 104 extending along the crease direction of the display screen 104 are L/2, 0, and L/2, respectively. At least two test points 100 are located in adjacent areas 108, wherein the distance between the two test points 100 closest to the bendable region 106 and a center line of the display 104 extending in the crease direction of the display 104 is L.

Illustratively, the test site 100 may be any one of a circular area, a rectangular area, and an annular area.

Specifically, the longest distance within test point 100 is 0.01 times to 0.2 times the length of bendable region 106 in the second direction. By defining the maximum distance within the test site 100 by the length of the bendable region 106 in the second direction, the test site 100 may be prevented from being too large in size to interfere with an adjacent test site 100.

For example, the length of the bendable region 106 in the second direction is L, and the longest distance within each test site is 0.1L. If the test point is a circular area, the diameter of the test point is 0.1L. If the test point is a rectangular area, the length of the test point is 0.1 x L.

In step S604, in the same test combination, the luminance differences between the most middle test point and each test point except for the most middle test point are determined, and the maximum value of the luminance differences is determined as the maximum luminance difference of the test combination.

Specifically, this step S604 may include:

the maximum luminance difference Δl for one test combination is determined using the following formula:

The number of the plurality of test points is 2x i+1, and L ₁、L₂、……、L_i、L_i+1、L_i+2、……、L_2*i、L_2*i+1 is the brightness value of each test point in turn.

In this embodiment, the most middle test point 100 is located on a central line extending along the crease direction of the display screen 104 in the bendable region 106, the region where the central line is located is generally most affected by the bending of the display screen 104, and the absolute value of the brightness difference between other test points 100 and the most middle test point 100 is determined based on the most middle test point 100, so that the difference in brightness between the bendable region 106 and the adjacent region 108 can be determined more accurately, and the calculated amount is less. The brightness difference absolute value divided by the brightness value of the test point 100 at the middle can be used for homogenizing, so that the influence of the brightness of the display screen 106 on the crease degree of the bendable region can be eliminated, and the accuracy of determining the crease degree of the bendable region can be improved. The calculated maximum brightness difference is divided by 0.004, and the maximum brightness difference can be converted into a representation unit of the brightness difference which can be just recognized by the human face.

In addition, only one test combination is provided, so that the maximum brightness difference of the test combination is the maximum brightness difference of the display screen.

In step S606, in the same test combination, a first chromaticity difference between the most middle test point and each test point except for the most middle test point is determined, and a maximum value in the first chromaticity differences is determined as a first maximum chromaticity difference of the test combination.

The step S606 may be performed after the step S604, may be performed simultaneously with the step S604, or may be performed before the step S604.

Specifically, the step S606 includes:

the first maximum chromaticity difference Δxy1 of a test combination is determined using the following formula:

The number of the test points is 2 x i+1, x ₁ and y ₁、x₂ and y ₂、……、x_i and y _i、x_i+1 and y _i+1、x_i+2 and y _i+2、……、x_2*i and y _2*i、x_2*i+1 and y _2*i+1 are chromaticity values of the test points in sequence.

In this embodiment, x and y are coordinate values on the chromaticity diagram, and may represent chromaticity values. Illustratively, the chromaticity diagram may be CIE1931 or CIE1976.

The most middle test point 100 is located on a central line extending along the crease direction of the display screen 104 in the bendable region 106, the region where the central line is located is generally most affected by the bending of the display screen 104, and the chromaticity difference between other test points 100 and the most middle test point 100 is determined based on the most middle test point 100, so that the chromaticity difference of the bendable region 106 can be accurately determined, and the calculated amount is less. The calculated maximum chroma difference is divided by 0.004, and the maximum chroma difference can be converted into a representation unit of the chroma difference which can be just recognized by the human face.

In addition, there is only one test combination, so the first maximum chromaticity difference of the test combination is the first maximum chromaticity difference of the display screen.

In step S608, in the same test combination, a second chromaticity difference between two test points arranged symmetrically at each center is determined, and a maximum value of the second chromaticity differences is determined as a second maximum chromaticity difference of the test combination.

Specifically, the step S608 includes:

the second maximum chromaticity difference Δxy2 of one test combination is determined using the following formula:

In this embodiment, the most middle test point 100 is located on a central line of the bendable region 106 extending along the crease direction of the display screen 104, where the region where the central line is located is generally most affected by the bending of the display screen 104, the test points 100 except the most middle test point 100 are arranged symmetrically with respect to the center of the most middle test point 100, the chromaticity values of the two test points arranged symmetrically in each center should be theoretically the same, and the chromaticity difference between the two test points arranged symmetrically in each center is determined, which can avoid ignoring the difference in chromaticity between the two test points arranged symmetrically in each center in special cases, and improve the accuracy of determining the crease degree of the bendable region. The calculated maximum chroma difference is divided by 0.004, and the maximum chroma difference can be converted into a representation unit of the chroma difference which can be just recognized by the human face.

In addition, there is only one test combination, so the second maximum color difference value of the test combination is the second maximum color difference of the display screen.

In step S610, the crease degree of the bendable region is determined based on the maximum luminance difference, the first maximum chromaticity difference and the second maximum chromaticity difference of the display screen.

Specifically, the step S610 includes:

The degree of crease phi of the bendable region is determined by the following formula:

φ＝k1*ΔL+k2*Δxy1+k3*Δxy2；

Wherein k1 is a correlation coefficient between a maximum luminance difference of the display screen and a crease degree of the bendable region, Δl is a correlation coefficient between a first maximum chromaticity difference of the display screen and a crease degree of the bendable region, Δxy1 is a correlation coefficient between a second maximum chromaticity difference of the display screen and a crease degree of the bendable region, and Δxy2 is a second maximum chromaticity difference of the display screen.

Illustratively, the correlation coefficient between the maximum luminance difference and the maximum chromaticity difference of the display screen and the degree of crease of the bendable region may be determined in the following manner:

the first step, display screens with different bending times are presented with images, and crease degrees of bendable areas of the display screens are manually judged.

Wherein, the crease degree can take a value between 0 and 100.

For example, a display screen with ten thousand times of bending is presented with an image, and the crease degree of a bendable area of the display screen is artificially judged to be 20; displaying images on a display screen with the bending times of twenty thousands times, and artificially judging that the crease degree of a bendable region of the display screen is 50; and displaying the image on a display screen with the bending times of thirty thousands of times, and manually judging that the crease degree of the bendable region of the display screen is 90.

And secondly, obtaining brightness values and chromaticity values of a plurality of test points of each display screen.

The luminance value of each test point of the same display screen is the luminance value when the display screen presents the same image, and the chrominance value of each test point of the same display screen is the chrominance value when the display screen presents the same image. Different display screens may present the same image or may present different images.

And thirdly, determining the maximum brightness difference, the first maximum chromaticity difference and the second maximum chromaticity difference of each display screen based on a plurality of test points, the brightness value and the chromaticity value of the display screen.

And fourthly, taking the maximum brightness difference, the first maximum chromaticity difference and the second maximum chromaticity difference of the same display screen as independent variables, taking the crease degree of the bendable region of the display screen which is judged manually as the dependent variables, and fitting a relational expression between the maximum brightness difference, the first maximum chromaticity difference, the second maximum chromaticity difference and the crease degree of the bendable region of the display screen, so as to obtain a correlation coefficient between the maximum brightness difference and the maximum chromaticity difference of the display screen and the crease degree of the bendable region.

In one embodiment, as shown in fig. 8, there is provided a method for determining a crease degree of a display screen, including the steps of:

step S802, obtaining brightness values and chromaticity values of a plurality of test points when the display screen presents the same image.

In this embodiment, a plurality of test points form a test combination, and test points in the same test combination are arranged at intervals along a first direction, and the first direction forms an included angle with a crease direction of the display screen. Illustratively, the first direction is 90 ° to the crease direction of the display screen, i.e. the first direction is perpendicular to the crease direction of the display screen.

Illustratively, in the same test combination, the most middle test point is located on a center line of the bendable region extending along a crease direction of the display screen, and the test points except for the most middle test point are arranged symmetrically with respect to the center of the most middle test point.

In other embodiments, in the same test combination, the most middle test point is located on a central line of the bendable region extending along the crease direction of the display screen, and the test points except for the most middle test point are asymmetrically distributed on two sides of the most middle test point.

In step S804, in the same test combination, the brightness difference between each two test points is determined, and the maximum value of the brightness differences is determined as the maximum brightness difference of the test combination.

Specifically, the step S804 may include:

In this embodiment, the brightness difference between every two test points is determined, so that the brightness difference between any two test points is not missed, and the difference between the bendable region and the adjacent region in brightness can be accurately determined. The middle test point is located on the central line of the bendable region extending along the crease direction of the display screen, the region where the central line is located is generally most affected by folding, and the brightness difference divided by the brightness value of the middle test point 100 is homogenized, so that the influence of the brightness of the display screen 106 on the crease degree of the bendable region can be eliminated, and the accuracy of determining the crease degree of the bendable region is improved.

In addition, the plurality of test points form a test combination, so that the maximum brightness difference of the test combination is the maximum brightness difference of the display screen.

In step S806, in the same test combination, the chromaticity difference between each two test points is determined, and the maximum value of the chromaticity differences is determined as the maximum chromaticity difference of the test combination.

The step S806 may be performed after the step S804, may be performed simultaneously with the step S804, or may be performed before the step S804.

Specifically, this step S806 includes:

the maximum chromaticity difference Δxy of a test combination is determined using the following formula:

In this embodiment, the chromaticity difference between every two test points is determined, so that the chromaticity difference between any two test points is not missed, and the difference of the bendable region in chromaticity can be accurately determined.

In addition, the plurality of test points form a test combination, so that the maximum chromaticity difference of the test combination is the maximum chromaticity difference of the display screen.

Step S808, determining the crease degree of the bendable region based on the maximum brightness difference and the maximum chromaticity difference of the display screen.

Specifically, this step S808 includes:

φ＝k1*ΔL+k4*Δxy；

Wherein k1 is a correlation coefficient between the maximum luminance difference of the display screen and the crease degree of the bendable region, Δl is a correlation coefficient between the maximum chromaticity difference of the display screen and the crease degree of the bendable region, and Δxy is the maximum chromaticity difference of the display screen.

And thirdly, determining the maximum brightness difference and the maximum chromaticity difference of each display screen based on a plurality of test points, the brightness value and the chromaticity value of the display screen.

And fourthly, taking the maximum brightness difference and the maximum chromaticity difference of the same display screen as independent variables, taking the crease degree of the bendable region of the display screen which is judged manually as the dependent variables, and fitting a relational expression between the maximum brightness difference, the maximum chromaticity difference and the crease degree of the bendable region, thereby obtaining a correlation coefficient between the maximum brightness difference and the maximum chromaticity difference of the display screen and the crease degree of the bendable region.

In one embodiment, as shown in fig. 9, there is provided a method for determining a crease degree of a display screen, including the steps of:

Step S902, obtaining luminance values and chrominance values of the plurality of test points when the display screen presents the same image.

In this embodiment, as shown in fig. 10, a plurality of test points 100 form a plurality of test combinations, the plurality of test combinations are arranged at intervals along a crease direction (indicated by an arrow in fig. 10) of the display screen, and the test points 100 in the same test combination are arranged at intervals along a first direction, and the first direction forms an included angle with the crease direction of the display screen. Illustratively, the first direction is 90 ° to the crease direction of the display screen, i.e. the first direction is perpendicular to the crease direction of the display screen.

In practical applications, the bendable region 106 is generally a strip-shaped region, and the length direction of the strip-shaped region is the crease direction of the display screen 104, and the bendable region 106 penetrates the display screen 104 along the length direction of the strip-shaped region. The test combinations are arranged at intervals along the crease direction of the display screen, so that crease degrees of different positions on the display screen 104 can be obtained, and accuracy of determining the crease degrees of the bendable regions is improved.

The plurality of test combinations are arranged uniformly along the crease direction of the display screen, and the distance between two adjacent test combinations is a constant value.

For example, the length of the bendable region 106 in the crease direction of the display screen is S, and the interval between two adjacent test combinations is S/5. Assuming that the plurality of test points 100 includes seven test combinations, distances between each test combination and a center line extending in a direction perpendicular to the crease direction in the display screen 104 are s×3/5, s×2/5, S/5, 0, S/5, s×2/5, s×3/5, respectively.

Illustratively, the test point of the middle most test combination is located on a midline of the display screen 104 extending in a direction perpendicular to the crease direction.

Illustratively, the distance between the test combination and the edge of the display screen 104 extending in a direction perpendicular to the crease direction is greater than 1/10 of the length of the display screen 104 in the crease direction.

The edges of the display 104 may be curved, and the viewing angle may also change when the display 104 is not bent, which may result in inaccurate crease levels in the determined bendable regions if test points are provided. The distance between the test combination and the edge of the display screen 104 extending along the vertical direction of the crease direction is greater than 1/10 of the length of the display screen 104 along the crease direction, so that the test points can be prevented from being arranged on the edge of the display screen 104, and the accuracy of determining the crease degree of the bendable region is improved.

Step S904, determining the maximum luminance difference and the maximum chrominance difference of each test combination based on the luminance value and the chrominance value.

In one implementation, the step S904 includes: in the same test combination, determining the brightness difference between every two test points, and determining the maximum value in the brightness differences as the maximum brightness difference of the test combination; in the same test combination, the chromaticity difference between every two test points is determined, and the maximum value in the chromaticity difference is determined as the maximum chromaticity difference of the test combination.

In another implementation, the maximum chromaticity difference of the test combination includes a first maximum chromaticity difference and a second maximum chromaticity difference; the step S904 includes: in the same test combination, determining brightness differences between the most middle test point and each test point except for the most middle test point, and determining the maximum value in the brightness differences as the maximum brightness difference of the test combination; in the same test combination, determining a first chromaticity difference between the most middle test point and each test point except the most middle test point, and determining the maximum value in the first chromaticity difference as the first maximum chromaticity difference of the test combination; in the same test combination, a second chromaticity difference between two test points which are arranged in a central symmetry mode is determined, and the maximum value in the second chromaticity difference is determined as the second maximum chromaticity difference of the test combination.

Step S906, determining the maximum value of the maximum luminance differences of the test combination as the maximum luminance difference of the display screen.

Step S908, determining the maximum value of the maximum chromaticity differences of the test combination as the maximum chromaticity difference of the display screen.

The step S908 may be performed after the step S906, may be performed simultaneously with the step S906, or may be performed before the step S906.

In an exemplary embodiment, when the maximum chromaticity difference of the test combination includes the first maximum chromaticity difference and the second maximum chromaticity difference, the maximum chromaticity difference of the display screen also includes the first maximum chromaticity difference and the second maximum chromaticity difference.

Accordingly, the step S908 includes: determining the maximum value of the first maximum chromaticity differences of the test combination as the first maximum chromaticity difference of the display screen; and determining the maximum value of the second maximum chromaticity differences of the test combination as the second maximum chromaticity difference of the display screen.

Step S910, determining the crease degree of the bendable region based on the maximum brightness difference and the maximum chromaticity difference of the display screen.

It should be understood that, although the steps in the flowcharts of fig. 4, 6, 8-9 are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps of FIGS. 4, 6, 8-9 may include steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor does the order in which the steps or stages are performed necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the steps or stages in other steps.

In one embodiment, as shown in fig. 11, there is provided a display screen crease degree determining apparatus 1100, including: an acquisition module 1101, a difference determination module 1102, and a degree determination module 1103, wherein:

the obtaining module 1101 is configured to obtain luminance values and chrominance values of a plurality of test points when the display screen presents the same image, where a distribution area of the plurality of test points includes a bendable area of the display screen.

The difference determining module 1102 is configured to determine a maximum luminance difference and a maximum chrominance difference of the display screen based on the luminance value and the chrominance value.

The degree determining module 1103 is configured to determine a crease degree of the bendable region based on the maximum luminance difference and the maximum chromaticity difference of the display screen.

In one embodiment, the plurality of test points form at least one test combination, and the test points in the same test combination are arranged at intervals along a first direction, and the first direction forms an included angle with the crease direction of the display screen.

Illustratively, the difference determination module 1102 includes a combination determination unit, a plurality of determination units, and a single determination unit, wherein: a combination determining unit configured to determine a maximum luminance difference and a maximum chrominance difference of each test combination based on the luminance value and the chrominance value; a plurality of determining units for determining, when the test combination is plural, a maximum value of the maximum luminance differences of the test combination as a maximum luminance difference of the display screen, and a maximum value of the maximum chrominance differences of the test combination as a maximum chrominance difference of the display screen; and the single determining unit is used for determining that the maximum brightness difference of the test combination is the maximum brightness difference of the display screen and determining that the maximum chromaticity difference of the test combination is the maximum chromaticity difference of the display screen when the test combination is one.

In one implementation, the combination determining unit is configured to determine, in the same test combination, a luminance difference between each two test points, and determine a maximum value of the luminance differences as a maximum luminance difference of the test combination; in the same test combination, the chromaticity difference between every two test points is determined, and the maximum value in the chromaticity difference is determined as the maximum chromaticity difference of the test combination.

Illustratively, the extent determining module 1103 is configured to determine the crease extent Φ of the bendable region using the following formula: phi = k1 Δl+k4 Δxy; wherein k1 is a correlation coefficient between the maximum luminance difference of the display screen and the crease degree of the bendable region, Δl is a correlation coefficient between the maximum chromaticity difference of the display screen and the crease degree of the bendable region, and Δxy is the maximum chromaticity difference of the display screen.

In another implementation, in the same test combination, the most middle test point is located on a central line of the bendable region extending along the crease direction of the display screen, and the test points except for the most middle test point are arranged symmetrically with respect to the center of the most middle test point.

Specifically, the maximum chromaticity difference of the test combination includes a first maximum chromaticity difference and a second maximum chromaticity difference; the combination determining unit is used for determining brightness differences between the most middle test point and each test point except for the most middle test point in the same test combination, and determining the maximum value in the brightness differences as the maximum brightness difference of the test combination; in the same test combination, determining a first chromaticity difference between the most middle test point and each test point except the most middle test point, and determining the maximum value in the first chromaticity difference as the first maximum chromaticity difference of the test combination; in the same test combination, a second chromaticity difference between two test points which are arranged in a central symmetry mode is determined, and the maximum value in the second chromaticity difference is determined as the second maximum chromaticity difference of the test combination.

The maximum chromaticity difference of the display screen includes a first maximum chromaticity difference determined based on the first maximum chromaticity difference of the test combination and a second maximum chromaticity difference determined based on the second maximum chromaticity difference of the test combination; the degree determining module 1103 is configured to determine the degree of crease phi of the bendable region according to the following formula: phi = k1 Δl+k2 Δxy1+k3 Δxy2; wherein k1 is a correlation coefficient between a maximum luminance difference of the display screen and a crease degree of the bendable region, Δl is a correlation coefficient between a first maximum chromaticity difference of the display screen and a crease degree of the bendable region, Δxy1 is a correlation coefficient between a second maximum chromaticity difference of the display screen and a crease degree of the bendable region, and Δxy2 is a second maximum chromaticity difference of the display screen.

In one embodiment, the distribution region of the plurality of test points further includes an adjacent region adjacent to the bendable region.

For a specific limitation of the display screen crease level determining device, reference may be made to the limitation of the display screen crease level determining method hereinabove, and no further description is given here. The above-mentioned display screen crease degree determination device may be implemented by all or part of each module by software, hardware, and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.

In one embodiment, a computer device is provided, the internal structure of which may be as shown in FIG. 12. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of determining a crease level of a display screen.

It will be appreciated by those skilled in the art that the structure shown in FIG. 12 is merely a block diagram of some of the structures associated with the present inventive arrangements and is not limiting of the computer device to which the present inventive arrangements may be applied, and that a particular computer device may include more or fewer components than shown, or may combine some of the components, or have a different arrangement of components.

In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the steps of the method embodiments described above when the computer program is executed.

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when executed by a processor, implements the steps of the method embodiments described above.

Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory. By way of illustration, and not limitation, RAM can be in various forms such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. A method for determining a crease level of a display screen, the method comprising:

Acquiring brightness values and chromaticity values of a plurality of test points when a display screen presents the same image, wherein the distribution area of the plurality of test points comprises a bendable area of the display screen; the test points in the same test combination are arranged at intervals along a first direction, and the first direction forms an included angle with the crease direction of the display screen;

2. The method of claim 1, wherein the included angle is 30 °, 60 °, or 90 °.

3. The method of claim 1, wherein the determining a maximum luminance difference and a maximum chrominance difference of the display screen based on the luminance value and the chrominance value comprises:

4. A method according to claim 3, wherein said determining a maximum luminance difference and a maximum chrominance difference for each test combination based on said luminance value and said chrominance value comprises:

5. The method of any one of claims 1 to 4, wherein the determining a crease level of the bendable region based on a maximum luminance difference and a maximum chromaticity difference of the display screen comprises:

φ＝k1*ΔL+k4*Δxy；

6. A method according to claim 3, wherein in the same test combination, the most intermediate test points are located on a central line of the bendable region extending in the crease direction of the display screen, and the test points other than the most intermediate test points are arranged centrally symmetrically with respect to the most intermediate test points.

7. The method of claim 6, wherein the maximum chromaticity difference of the test combination includes a first maximum chromaticity difference and a second maximum chromaticity difference; the determining a maximum luminance difference and a maximum chrominance difference for each test combination based on the luminance value and the chrominance value comprises:

8. The method of claim 7, wherein the maximum chromaticity difference of the display screen comprises a first maximum chromaticity difference determined based on the first maximum chromaticity difference of the test combination and a second maximum chromaticity difference determined based on the second maximum chromaticity difference of the test combination;

φ＝k1*ΔL+k2*Δxy1+k3*Δxy2；

9. The method of claim 1, wherein the distribution region of the plurality of test points further comprises an adjacent region adjacent to the pliable region.

10. A display screen fold degree determining apparatus, characterized in that the apparatus comprises:

the device comprises an acquisition module, a display screen and a display screen, wherein the acquisition module is used for acquiring brightness values and chromaticity values of a plurality of test points when the display screen presents the same image, and a distribution area of the plurality of test points comprises a bendable area of the display screen; the test points in the same test combination are arranged at intervals along a first direction, and the first direction forms an included angle with the crease direction of the display screen;