Display parameter variation evaluation method, device, equipment and storage medium

Abstract

The present application discloses a display parameter variation evaluation method, device, equipment and storage medium, the method comprising: when a display panel displays an image at a preset grayscale, measuring the image at different refresh frequencies according to a preset measurement frequency to obtain multiple display parameter information; obtaining the first display parameter information corresponding to the image at the first refresh frequency and the second display parameter information corresponding to the second refresh frequency from the multiple display parameter information; calculating the display parameter variation degree corresponding to the first display parameter information and the second display parameter information according to a preset display parameter variation algorithm. According to the embodiment of the present application, the display parameter variation amplitude of the display panel when the refresh frequency is switched can be quantified, providing a unified evaluation standard for users.

Description

Technical Field

[0001] The present application belongs to the technical field of display panels, and in particular, relates to a display parameter change evaluation method, device, equipment and storage medium. Background Art

[0002] Existing display panel products usually support a variety of different refresh rates to adapt to different usage scenarios. For example, taking mobile terminals as an example, panel products can support a variety of different refresh rates such as 60Hz, 90Hz, 120Hz, 144Hz, etc. In different usage scenarios such as reading e-books, watching videos or playing games, different refresh rates can be switched respectively.

[0003] When switching the refresh rate, the image displayed by the display panel is prone to brightness changes or color changes, thus affecting the display effect of the image. In addition, different display panels produce different brightness and color changes when switching the refresh rate. When selecting a panel product, users cannot determine the degree of change in brightness and color of the panel product. Summary of the invention

[0004] The embodiments of the present application provide a display parameter change evaluation method, device, equipment and storage medium, which can solve the technical problem of being unable to determine the degree of change of the display parameters of a panel product when the refresh rate is switched.

[0005] In a first aspect, an embodiment of the present application provides a method for evaluating a display parameter change, the method comprising:

[0006] When the display panel displays an image at a preset grayscale, the image at different refresh frequencies is measured according to a preset measurement frequency to obtain a plurality of display parameter information;

[0007] Acquire, from the plurality of display parameter information, first display parameter information corresponding to the image at the first refresh rate and second display parameter information corresponding to the image at the second refresh rate;

[0008] The display parameter change degrees corresponding to the first display parameter information and the second display parameter information are calculated according to a preset display parameter change algorithm.

[0009] In some embodiments, the display parameter change amount evaluation method further includes:

[0010] During the process of measuring the image screen, the first image signal output to the display panel is adjusted to a second image signal, so that the display panel switches the first refresh frequency of the image screen to the second refresh frequency; the first refresh frequency and the second refresh frequency are both less than the preset measurement frequency;

[0011] In some embodiments, measuring images at different refresh frequencies according to a preset measurement frequency includes:

[0012] Control the color analyzer to measure the image screens at different refresh frequencies according to the preset measurement frequency;

[0013] Adjusting a first image signal output to a display panel into a second image signal includes:

[0014] The control signal generator adjusts the first image signal output to the display panel into a second image signal.

[0015] In some embodiments, the display parameter information includes brightness information and / or chromaticity information, and calculating the display parameter change degree corresponding to the first display parameter information and the second display parameter information according to a preset display parameter change algorithm includes:

[0016] The brightness change degree corresponding to the first display parameter information and the second display parameter information is calculated according to the brightness change algorithm, and / or the chromaticity change degree corresponding to the first display parameter information and the second display parameter information is calculated according to the chromaticity change algorithm.

[0017] In some embodiments, the brightness change degree corresponding to the first display parameter information and the second display parameter information is calculated according to a brightness change algorithm, and the brightness change algorithm includes:

[0018] D1=k1*|(Lv1-Lv2) / (Lv1+Lv2)|;

[0019] Wherein, D1 is the brightness change degree, k1 is the conversion coefficient, Lv1 is the first brightness value in the first display parameter information, and Lv2 is the second brightness value in the second display parameter information.

[0020] In some embodiments, the color coordinates include color coordinates u' and v' of a CIE chromaticity diagram, and the degree of chromaticity change corresponding to the first display parameter information and the second display parameter information is calculated according to a chromaticity change algorithm, the chromaticity change algorithm including:

[0021]

[0022] D2=Δu'v' / k2;

[0023] Among them, D2 is the degree of chromaticity change, k2 is the conversion coefficient, and u i '、v i ' is the second color coordinate in the second display parameter information, u0' and v0' are the first color coordinate in the first display parameter information.

[0024] In some embodiments, obtaining first display parameter information corresponding to an image at a first refresh rate and second display parameter information corresponding to a second refresh rate from a plurality of display parameter information includes:

[0025] From the plurality of display parameter information, sequentially calculating the measurement difference between each display parameter information and the next adjacent display parameter information;

[0026] When the measurement difference increases from within the preset error range to outside the preset error range, determining the first display parameter information according to the first display parameter information of the two display parameter information corresponding to the measurement difference;

[0027] When the measurement difference decreases from outside the preset error range to within the preset error range, the second display parameter information is determined according to the first display parameter information of the two display parameter information corresponding to the measurement difference.

[0028] In some embodiments, determining the first display parameter information according to the first display parameter information of the two display parameter information corresponding to the measurement difference includes:

[0029] Determining a first interval corresponding to the first refresh frequency according to a previous display parameter information of two display parameter information corresponding to the measured difference, wherein the measured difference between any two adjacent display parameter information in the first interval is less than a preset error range;

[0030] The first display parameter information is determined according to at least one display parameter information in the first interval.

[0031] In some embodiments, determining the second display parameter information according to the first display parameter information of the two display parameter information corresponding to the measured difference value includes:

[0032] Determine a second interval corresponding to the second refresh frequency according to the first display parameter information of the two display parameter information corresponding to the measured difference, wherein the measured difference between any two adjacent display parameter information in the second interval is less than a preset error range;

[0033] The second display parameter information is determined according to at least one display parameter information in the second interval.

[0034] In some embodiments, before measuring the image frames at different refresh frequencies according to the preset measurement frequency, the method further includes:

[0035] Controlling the display panel to display a preset light-up picture in a first gray scale;

[0036] When the display panel displays a preset lighting picture at the first gray scale for a preset lighting time, controlling the display panel to switch the first gray scale to a preset gray scale;

[0037] In some embodiments, the first grayscale is the highest grayscale, and the preset lit picture is a white picture.

[0038] In a second aspect, an embodiment of the present application provides a display parameter change evaluation device, the device comprising:

[0039] A measuring module, used for measuring images at different refresh frequencies according to a preset measurement frequency when the display panel displays an image at a preset gray scale, so as to obtain a plurality of display parameter information;

[0040] An acquisition module, used to acquire, from the plurality of display parameter information, first display parameter information corresponding to the image at the first refresh rate and second display parameter information corresponding to the image at the second refresh rate;

[0041] The calculation module is used to calculate the display parameter change degree corresponding to the first display parameter information and the second display parameter information according to a preset display parameter change algorithm.

[0042] In a third aspect, an embodiment of the present application provides a display parameter change amount evaluation device, the display parameter change amount evaluation device comprising: a processor and a memory storing computer program instructions;

[0043] When the processor executes the computer program instructions, the above display parameter change amount evaluation method is implemented.

[0044] In a fourth aspect, an embodiment of the present application provides a computer storage medium having computer program instructions stored thereon, and when the computer program instructions are executed by a processor, the above display parameter change evaluation method is implemented.

[0045] Compared with the prior art, the display parameter variation evaluation method, device, equipment and storage medium provided in the embodiment of the present application can obtain multiple display parameter information by measuring the image picture under the preset gray scale displayed by the display panel according to the preset measurement frequency. During the measurement process, the refresh frequency of the display panel is adjusted so that the multiple display parameter information contains the display parameter information of the image picture under different refresh frequencies. After distinguishing the first display parameter information under the first refresh frequency and the second display parameter information under the second refresh frequency from the multiple display parameter information, the display parameter variation degree corresponding to the first display parameter information and the second display parameter information can be calculated according to the preset display parameter variation algorithm, thereby quantifying the display parameter variation amplitude of the display panel when the refresh frequency is switched. In addition, the user can also determine whether the user's needs are met based on the display parameter variation degree, providing a unified evaluation standard for the user to select a suitable panel product. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0047] Figure 1 It is a flow chart of a method for evaluating a display parameter change amount provided in an embodiment of the present application;

[0048] Figure 2 is a flow chart of a method for evaluating a display parameter change amount provided by another embodiment of the present application;

[0049] Figure 3 is a flow chart of a method for evaluating a display parameter change amount provided by another embodiment of the present application;

[0050] Figure 4 is a flow chart of a method for evaluating a display parameter change amount provided in yet another embodiment of the present application;

[0051] Figure 5 A schematic diagram of the structure of a display parameter variation evaluation device provided in another embodiment of the present application;

[0052] Figure 6 A schematic diagram of the structure of a display parameter change evaluation device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0053] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0055] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The embodiments will be described in detail below in conjunction with the accompanying drawings.

[0056] At present, existing display panel products can usually support a variety of different refresh rates to adapt to different usage scenarios. For example, taking mobile terminals as an example, panel products can support a variety of different refresh rates such as 60Hz, 90Hz, 120Hz, 144Hz, etc. In different usage scenarios such as reading e-books, watching videos or playing games, different refresh rates can be switched respectively.

[0057] When switching the refresh rate, the image displayed by the display panel is prone to brightness changes or color changes, thus affecting the display effect of the image. In addition, different display panels produce different brightness and color changes when switching the refresh rate. When selecting a panel product, users cannot determine the magnitude of the brightness and color changes of the panel product.

[0058] In order to solve the above technical problems, the embodiments of the present application provide a display parameter variation evaluation method, device, equipment and storage medium. The display parameter variation evaluation method provided by the embodiments of the present application is first introduced below.

[0059] Figure 1 The following is a flow chart of a method for evaluating the change in display parameters provided by an embodiment of the present application. The method for evaluating the change in display parameters includes:

[0060] S110, when the display panel displays an image at a preset grayscale, measuring the image at different refresh frequencies according to a preset measurement frequency to obtain a plurality of display parameter information;

[0061] S120, acquiring, from the plurality of display parameter information, first display parameter information corresponding to the image at the first refresh rate and second display parameter information corresponding to the image at the second refresh rate;

[0062] S130, calculating the display parameter change degrees corresponding to the first display parameter information and the second display parameter information according to a preset display parameter change algorithm.

[0063] The display parameter change evaluation method provided in the embodiment of the present application can be applied to a display parameter change evaluation device, which can measure the display parameter information of the image when the display panel displays the image, and calculate the degree of display parameter change when the refresh frequency of the image is switched, so as to objectively evaluate the display image change when the refresh frequency of the display panel is switched. The display panel can be a television, a smart mobile terminal or a tablet computer, etc. The specific form of the display panel is not limited in this embodiment.

[0064] In S110, the device can measure the image at a preset measurement frequency when the display panel displays the image at a preset grayscale to obtain multiple display parameter information. In the process of measuring the display parameter information of the image, when the refresh frequency of the image is switched, the display parameter information of the image before and after the refresh frequency is switched can be obtained, thereby realizing the measurement of the display parameter information of the image at different refresh frequencies.

[0065] It can be understood that the preset measurement frequency can be a measurement frequency preset by the device, and the user can also adjust the preset measurement frequency through relevant instructions.

[0066] Please refer to Figure 2 In some embodiments, the above display parameter change evaluation method may further include:

[0067] S210, during the process of measuring the image screen, adjusting the first image signal output to the display panel to a second image signal, so that the display panel switches the first refresh frequency of the image screen to a second refresh frequency; the first refresh frequency and the second refresh frequency are both lower than the preset measurement frequency.

[0068] In S210, when the device measures the image screen according to the preset measurement frequency, if the refresh frequency does not change, the multiple display parameter information obtained by measurement are all display parameter information of the image screen at the same refresh frequency. In order to make the multiple display parameter information obtained by measurement include image screens with different refresh frequencies, the device can adjust the first image signal output to the display panel to the second image signal during the measurement of the image screen. When the display panel receives the first image signal, it can display the image screen at the first refresh frequency and the preset gray scale; when it receives the second image signal, it can display the image screen at the second refresh frequency and the preset gray scale. The device can make the display panel switch the refresh frequency of the image screen displayed by the display panel from the first refresh frequency to the second refresh frequency by adjusting the image signal output to the display panel. At this time, during the continuous measurement process of the device, the multiple display parameter information obtained can include image screens at two different refresh frequencies.

[0069] It is understandable that in order to obtain the display parameter information corresponding to the refresh frequency before and after the switching, the preset measurement frequency of the device for measuring the image should be set to be greater than the refresh frequency of the image. That is, when the display panel displays a frame of the image, the device should measure at least one display parameter information to avoid the display parameter information measured by the device failing to show the difference in display parameter information before and after the refresh frequency switching.

[0070] When the first refresh frequency is greater than the second refresh frequency, the preset measurement frequency can be set to be greater than the first refresh frequency; when the second refresh frequency is greater than the first refresh frequency, the preset measurement frequency can be set to be greater than the second refresh frequency. That is, both the first refresh frequency and the second refresh frequency are less than the preset measurement frequency. For example, the refresh frequencies supported by the display panel may include 60Hz, 90Hz, 120Hz, 144Hz, and 165Hz, etc. The first refresh frequency and the second refresh frequency may be any two of the above refresh frequencies, and the preset measurement frequency may be set to be greater than the maximum refresh frequency of the above refresh frequencies. In some examples, the above preset measurement frequency may be 1000Hz.

[0071] In the above embodiment, S110 may further include:

[0072] When the display panel displays an image at a preset grayscale, the color analyzer is controlled to measure the image at different refresh frequencies according to a preset measurement frequency;

[0073] S210 may further include:

[0074] During the process of measuring the image frame, the control signal generator adjusts the first image signal output to the display panel to the second image signal, so that the display panel switches the first refresh frequency of the image frame to the second refresh frequency.

[0075] The device in this embodiment may specifically include at least a processing module, a color analyzer and a signal generator, and the color analyzer and the signal generator are both communicatively connected to the processing module.

[0076] The signal generator can be connected to the display panel, and under the control of the processing module, send a corresponding image signal to the display panel, so that the display panel displays a corresponding image according to the image signal. For example, the processing module can control the signal generator to send a first image signal to the display panel, so that the display panel displays an image at a first refresh frequency and a preset grayscale. The processing module can also control the signal generator to adjust the first image signal output to the display panel to a second image signal, so that the display panel switches the refresh frequency of the image from the first refresh frequency to the second refresh frequency. By switching the refresh frequency of the display panel by the signal generator, it is possible to simulate the refresh frequency switching scenario corresponding to the mode switching or application switching during normal use by the user, and measure the display parameter information of the image when the refresh frequency is switched by the color analyzer to calculate the change amplitude of the display parameters.

[0077] The color analyzer can be set to be separated from the display panel by a preset shooting distance and arranged relative to the display area of ​​the display panel, so that the color analyzer can shoot and measure the display area of ​​the display panel to obtain display parameter information of the image displayed in the display area.

[0078] The color analyzer can measure the image of the display panel according to the preset measurement frequency, and send the measured display parameter information to the processing module. With the cooperation of the processing module and the signal generator, the color analyzer can switch the refresh frequency of the image by adjusting the image signal during the process of measuring the image of the display panel. At this time, the color analyzer can obtain the display parameter information corresponding to the image at two different refresh frequencies during the continuous measurement process.

[0079] In S120, after acquiring multiple display parameter information corresponding to image frames with different refresh rates, the device can determine first display parameter information corresponding to the image frame at the first refresh rate and second display parameter information corresponding to the second refresh rate from the multiple parameter information.

[0080] It is understandable that, among the multiple display parameter information obtained by measuring the image screen according to the preset measurement frequency, the device can sort the display parameter information according to the measurement order according to the relevant parameters in the display parameter information. The relevant parameter can be a timestamp parameter or a number parameter of the display parameter information. It is understandable that, whether according to the number order of the display parameter information or the timestamp order, the multiple display parameter information can be sorted according to the order of the measurement time.

[0081] When the refresh frequency of the image is switched from the first refresh frequency to the second refresh frequency, the measurement time of the first display parameter information corresponding to the image at the first refresh frequency must be before the measurement time of the second display parameter information. That is, among the multiple display parameter information, the first display parameter information is in front and the second display parameter information is in the back. In an example, among the multiple display parameter information, the display parameter information arranged in the front with relatively stable parameter data can be used as the first display parameter information, and the display parameter information arranged in the back with relatively stable parameter data can be used as the second display parameter information. The first parameter information and the second parameter information can be determined from the multiple display parameter information by the above division method.

[0082] Please refer to Figure 3 In some embodiments, the above S120 may further include:

[0083] S310, from a plurality of display parameter information, sequentially calculating a measurement difference between each display parameter information and the next adjacent display parameter information;

[0084] S320, when the measurement difference increases from within the preset error range to outside the preset error range, determining the first display parameter information according to the first display parameter information of the two display parameter information corresponding to the measurement difference;

[0085] S330: When the measurement difference decreases from outside the preset error range to within the preset error range, determine the second display parameter information according to the first display parameter information of the two display parameter information corresponding to the measurement difference.

[0086] When the display panel switches the refresh frequency of the image, the display parameter information of the image will change. For example, the display parameter information may include brightness information and / or chromaticity information. The brightness information may be a brightness value, and the chromaticity information may be a color coordinate. Before the refresh frequency is switched, the brightness value and the color coordinate of the image will remain stable at a certain value; during the refresh frequency switching process, the brightness value and the color coordinate of the image will continue to change; after the refresh frequency switching process is completed, the brightness value and the color coordinate of the image will remain stable at another value, and the stabilized brightness value and the color coordinate are the brightness value and the color coordinate of the image at the second refresh frequency. When the device measures the image at different refresh frequencies according to the preset measurement frequency, if the preset measurement frequency is greater than the first refresh frequency and the second refresh frequency. Then the multiple display parameter information measured by the device will include the data of the display parameter information in the changing process, that is, the data of the display parameter information is between the first display parameter information and the second display parameter information. When determining the first display parameter information and the second display parameter information from a plurality of display parameter information, the display parameter information of the image frame during the change process should be filtered to prevent the display parameter information that continuously changes during the refresh frequency change process from affecting the calculation result.

[0087] In S310, after measuring and obtaining a plurality of display parameter information, the device may sort the display parameter information in sequence, and the sorting method may be the number of the display parameter information or the measurement timestamp of the display parameter information. After arranging the plurality of display parameter information in the order of measurement, the measurement difference between each display parameter information and the next adjacent display parameter information may be calculated in sequence.

[0088] It can be understood that the above-mentioned measurement difference may be the difference between the previous display parameter information and the next display parameter information, or may be the absolute value of the difference between the two display parameter information.

[0089] In S320, after calculating the measurement difference corresponding to each display parameter information in turn, it can be judged in turn whether each measurement difference exceeds the preset error range. When a plurality of consecutive measurement differences do not exceed the preset error range, and the next measurement difference increases from within the preset error range to outside the preset error range, the first display parameter information can be determined according to the previous display parameter information of the two display parameter information corresponding to the measurement difference.

[0090] When the refresh frequency does not change, the display parameter information of the display panel will remain stable, and the measurement difference between adjacent display parameter information obtained by continuous measurement is small, that is, the multiple measurement differences calculated at this time are all kept within the preset error range. When the refresh frequency is switched, the display parameter information of the display panel will change significantly, and the measurement difference between the two adjacent display parameter information will increase to exceed the preset error range. That is, during the refresh frequency switching process, the measurement difference will exceed the preset error range; and before and after the refresh frequency switching, the measurement difference will remain within the preset error range.

[0091] Through the preset error range, the switching process of the refresh frequency can be determined according to whether the measured difference between adjacent display parameters exceeds the preset error range, whether the display parameter information has a sudden change, and the first display parameter information can be calculated according to the previous display parameter information when the display parameter information has a sudden change. For example, if a plurality of consecutive measured differences are kept within the preset error range, and the next measured difference exceeds the preset error range, it can be determined that the measured difference at this time has increased from the preset error range to outside the preset error range. Among them, the time node corresponding to the previous display parameter information is the start node of the refresh frequency switching process.

[0092] It can be understood that before the start node of the refresh frequency switching process, the display panel displays the image at the first refresh frequency, at which time the display parameter information of the image is relatively stable, and the measured difference between two adjacent display parameter information is small. That is, in each image frame, among the continuous multiple display parameter information detected by the device, the measured difference between two adjacent display parameter information will remain within the preset error range. When the measured difference increases from within the preset error range to outside the preset error range, the previous display parameter information of the two display parameter information corresponding to the measured difference is the last display parameter information of the continuous multiple display parameter information. According to the previous display parameter information, the corresponding continuous multiple display parameter information can be determined in sequence, and the first display parameter information can be determined according to the continuous multiple display parameter information.

[0093] In some embodiments, the above S320 may include:

[0094] Determining a first interval corresponding to the first refresh frequency according to a previous display parameter information of two display parameter information corresponding to the measured difference, wherein the measured difference between any two adjacent display parameter information in the first interval is less than a preset error range;

[0095] The first display parameter information is determined according to at least one display parameter information in the first interval.

[0096] In this embodiment, when the device determines that the measured difference value increases from within the preset error range to outside the preset error range, the device can determine the first interval corresponding to the first refresh frequency according to the previous display parameter information of the two parameter information corresponding to the measured difference value outside the preset error range. The first interval includes the continuous multiple display parameter information in the above embodiment. In the first interval, the refresh frequency of the display panel is maintained at the first refresh frequency, and no refresh frequency switching occurs. Then, in the corresponding image frame, the measured difference value between any two adjacent display parameter information in the continuous multiple display parameter information will be less than the preset error range. That is, the measured difference value between any two adjacent display parameter information in the first interval is less than the preset error range.

[0097] Since the measurement difference between any two adjacent display parameter information is required to be less than the preset error range in the first interval, and the previous display parameter information of the two parameter information corresponding to the measurement difference outside the preset error range is the last display parameter information in the first interval, the first interval can be determined by obtaining a plurality of consecutive measurement differences that do not exceed the preset error range before the measurement difference that exceeds the preset error range, and determining the number of display parameter information in the first interval according to the number of measurement differences that do not exceed the preset error range. It can be understood that if the measurement difference that exceeds the preset error range includes 5 consecutive measurement differences that do not exceed the preset error range, the previous display parameter information and the previous 5 display parameter information can be determined as the first interval, and the first interval includes 6 consecutive display parameter information.

[0098] Since the deviation between each display parameter information in the first interval is small, after the device determines the first interval, at least one display parameter information can be obtained from the first interval, and the first display parameter information can be calculated based on the obtained display parameter information. In one example, the device can obtain any display parameter information from the first interval as the first display parameter information, or select two or more display parameter information from the first interval, and calculate the average value of the multiple display parameter information as the first display parameter information. Using the average value of the display parameter information in the first time interval where the display parameter information is relatively stable as the first display parameter information can improve the accuracy of the calculated display parameter information.

[0099] In S330, similar to the above-mentioned judgment method, during the process of switching the refresh frequency, the display parameter information of the display panel will continue to change until the refresh frequency is switched to the second refresh frequency, and the display parameter information of the display panel will gradually remain stable. When it is calculated that the measured difference between two adjacent display parameter information increases from within the preset error range to outside the preset error range, the subsequent measured differences can be judged in turn. If the measured difference is still outside the preset error range, the display panel is still in the refresh frequency switching process at this time. Until the device calculates that a certain measured difference is reduced to within the preset error range, it can be determined that the refresh frequency has been switched to the second refresh frequency at this time, and the second display parameter information is calculated based on the previous display parameter information of the two display parameter information corresponding to the measured difference. It can be understood that the time node corresponding to the previous display parameter information is the end node of the refresh frequency switching process.

[0100] In some embodiments, the above S330 may include:

[0101] Determine a second interval corresponding to the second refresh frequency according to the first display parameter information of the two display parameter information corresponding to the measured difference, wherein the measured difference between any two adjacent display parameter information in the second interval is less than a preset error range;

[0102] The second display parameter information is determined according to at least one display parameter information in the second interval.

[0103] Similar to the above-mentioned embodiment of determining the first display parameter information according to the first interval, when the device determines that a measurement difference value before a certain measurement difference value is outside the preset error range, and the measurement difference value is within the preset error range, it can be determined that the measurement difference value decreases from outside the preset error range to within the preset error range. At this time, the device can determine the second interval corresponding to the second refresh frequency according to the previous display parameter information of the two display parameter information corresponding to the measurement difference value. That is, the previous display parameter information is the first display parameter information of the continuous multiple display parameter information in the second interval.

[0104] Since the measurement difference between any two adjacent display parameter information in the second interval is less than the preset error range, the measurement difference between the two adjacent display parameter information can be calculated in sequence starting from the previous display parameter information, and a plurality of consecutive measurement differences that do not exceed the preset error range can be obtained, and the number of display parameter information in the second interval can be determined according to the number of the plurality of consecutive measurement differences. For example, if four consecutive measurement differences do not exceed the preset error range, the previous display parameter information and the subsequent four consecutive display parameter information can be determined as the second interval, and the second interval includes five consecutive display parameter information.

[0105] Since the deviation between each display parameter information in the second interval is small, the device can obtain at least one display parameter information from the second interval, and calculate the first display parameter information based on the obtained display parameter information. Similarly, the device can obtain any display parameter information from the second interval as the second display parameter information, or select two or more display parameter information from the second interval, and calculate the average value of the multiple display parameter information as the second display parameter information. Determining the second display parameter information based on the average value of the display parameter information can improve the accuracy of the calculated display parameter information.

[0106] In S130, after the first display parameter information and the second display parameter information are determined, the display parameter change degrees corresponding to the first display parameter information and the second display parameter information can be calculated according to a preset display parameter change algorithm.

[0107] In some embodiments, the display parameter information may include brightness information and / or chromaticity information, and S130 may further include:

[0108] Calculating the brightness change degree corresponding to the first display parameter information and the second display parameter information according to the brightness change algorithm;

[0109] And / or, calculating the chromaticity change degree corresponding to the first display parameter information and the second display parameter information according to a chromaticity change algorithm.

[0110] The display parameter variation algorithm may include at least one of a brightness variation algorithm and a chromaticity variation algorithm, and the display parameter information may include at least one of a brightness value and a color coordinate, wherein the brightness value corresponds to the brightness variation algorithm and the color coordinate corresponds to the chromaticity variation algorithm.

[0111] When the display parameter information includes brightness values, the device may determine the first brightness value according to the first display parameter information, determine the second brightness value according to the second display parameter information, and calculate the brightness change degree corresponding to the first brightness value and the second brightness value according to the brightness change algorithm.

[0112] Similarly, when the display parameter information includes color coordinates, the device can determine the first color coordinates according to the first display parameter information, determine the second color coordinates according to the second display parameter information, and calculate the chromaticity change degree corresponding to the first color coordinates and the second color coordinates according to the chromaticity change algorithm.

[0113] In some embodiments, in the above-mentioned calculation of the brightness change degree corresponding to the first display parameter information and the second display parameter information according to the brightness change algorithm, the brightness change algorithm may include:

[0114] D1=k1*|(Lv1-Lv2) / (Lv1+Lv2)|;

[0115] Wherein, D1 is the brightness change degree, k1 is the conversion coefficient, Lv1 is the first brightness value in the first display parameter information, and Lv2 is the second brightness value in the second display parameter information.

[0116] After determining the first brightness value Lv1 and the second brightness value Lv2 according to the first display parameter information and the second display parameter information, the brightness change degree D1 can be calculated according to the above formula. The numerical value of the brightness change degree can represent the quantification of the brightness change of the image when the refresh frequency is switched from the first refresh frequency to the second refresh frequency when the display panel displays the image of the preset gray scale.

[0117] In some examples, the unit of brightness value may be nit or candela / square meter (cd / m 2 ), the above conversion coefficient k1 can be set to 250 to avoid the calculated brightness change degree D1 having a too small value, thereby improving the user's parameter reading experience.

[0118] It is understandable that for any two display panels with display differences, for example, two display panels with at least one difference in model, material, production process and production batch. By controlling the display panels to switch the first refresh frequency to the second refresh frequency when displaying an image at a preset grayscale, and according to the brightness change algorithm, the brightness change degree of the image when the two different display panels are switched from the first refresh frequency to the second refresh frequency can be calculated respectively. When the value of the brightness change degree of a display panel is greater than the brightness change degree of another display panel, it means that the brightness change amplitude generated by the display panel when switching the refresh frequency is greater than the brightness change amplitude of the other display panel.

[0119] By comparing the brightness change of the two display panels, the brightness change of the two display panels when the refresh rate is switched can be determined, and the user can select a suitable display panel from the two display panels according to personal needs. That is, the brightness change degree can provide users with a unified evaluation standard, which helps users select a suitable panel product from different display panels according to their own needs.

[0120] In some embodiments, the color coordinates may include color coordinates u' and v' of a CIE chromaticity diagram. In the above calculation of the chromaticity change degree corresponding to the first display parameter information and the second display parameter information according to the chromaticity change algorithm, the chromaticity change algorithm may include:

[0121]

[0122] D2=Δu'v' / k2;

[0123] Among them, D2 is the degree of chromaticity change, k2 is the conversion coefficient, and u i '、v i ' is the second color coordinate in the second display parameter information, u0' and v0' are the first color coordinate in the first display parameter information.

[0124] Determine the first color coordinates u0', v0' and the second color coordinates u0' according to the first display parameter information and the second display parameter information i '、v i The chromaticity change degree D2 of the display panel can be calculated according to the above formula. The value of the chromaticity change degree can quantify the chromaticity change of the image when the refresh frequency switches from the first refresh frequency to the second refresh frequency when the display panel displays the image of the preset grayscale.

[0125] In some examples, the conversion coefficient k2 may be set to 0.004 to avoid the calculated value of the chromaticity change degree D2 being too small, thereby improving the user's parameter reading experience.

[0126] Similarly, for two different display panels, the magnitude of the brightness change generated by the two display panels when switching the refresh frequency can be compared based on the chromaticity change degree of the two display panels. When the value of the chromaticity change degree of a display panel is greater than that of the chromaticity change degree of another display panel, it means that the chromaticity change amplitude of the display panel when switching the refresh frequency is larger. Accordingly, when selecting a panel product, the user can also use the chromaticity change degree corresponding to different display panels as a unified evaluation standard to select a suitable panel product.

[0127] In the above embodiment, the chromaticity diagram may be a CIE LUV chromaticity diagram. The color coordinates may also be color coordinates x, y in the 1931 CIE-XYZ system. The color coordinates x, y in CIE-XYZ and the color coordinates u', v' in CIE LUV may be converted to each other.

[0128] It should be noted that in some embodiments, when the display panel switches the refresh rate, the device can simultaneously obtain the brightness value and the color coordinates, and respectively calculate the corresponding brightness change degree and chromaticity change degree. The user can determine the brightness and chromaticity change amplitude of different display panels when the refresh rate is switched according to the brightness change degree and chromaticity change degree of different display panels.

[0129] In the above embodiment, the display panel only displays an image at a preset grayscale, and the preset grayscale can be any grayscale within the grayscale range of 0-255, for example, the preset grayscale can be 255 grayscale. The refresh rates supported by the display panel may include 60Hz, 90Hz, 120Hz, 144Hz and 165Hz, etc. The first refresh rate and the second refresh rate can be any two of the refresh rates supported by the display panel, for example, the first refresh rate and the second refresh rate can be 60Hz and 120Hz, respectively. The degree of change of the display parameters finally calculated by the device can represent the magnitude of the change in the display parameters when the display panel switches from an image at 60Hz and 255 grayscale to an image at 120Hz and 255 grayscale.

[0130] In the above embodiment, the preset grayscale can also be adjusted to other grayscales within the grayscale range of 0-255. For example, the preset grayscale can be adjusted to grayscale 16, grayscale 32, grayscale 64, and grayscale 128, and the corresponding display parameter change degree when the image screen switches from the first refresh frequency to the second refresh frequency under different preset grayscales is calculated respectively.

[0131] By adjusting the preset grayscale of the image and selecting the first refresh rate and the second refresh rate, the corresponding display parameter change degree when the display panel displays images of different grayscales when the selected first refresh rate switches to the second refresh rate can be obtained.

[0132] After calculating the multiple display parameter change degrees of the display panel, the multiple display parameter change degrees can be provided to the user so that the user can determine the quantitative value of the display parameter change of the image screen during the refresh frequency switching process under different preset grayscales. It can be understood that when the number of grayscales set and the refresh frequency supported by the display panel are large, the number of display parameter change degrees calculated is large. At this time, some display parameter change degrees can be selected from the multiple display parameter change degrees to be provided to the user. For example, when the user uses the panel product to read e-books, watch videos and play games, the main refresh frequencies used are 60Hz, 90Hz and 120Hz respectively, and the selected main grayscales include 255 grayscales and 128 grayscales. Then, the partial display parameter change degrees involving the above refresh frequencies and grayscales can be selected from the multiple display parameter change degrees, so that the user can determine the display parameter change degree of the display panel under the switching of the main use mode according to the partial display parameter change degree.

[0133] In another embodiment, after calculating the change degrees of multiple display parameters, the weight coefficient corresponding to the change degree of each display parameter can be determined according to the grayscale corresponding to the change degree of each display parameter and the refresh frequency before and after the switch, and the product of each display parameter change degree and the weight coefficient is accumulated to obtain the overall display parameter change degree. The user can intuitively compare the overall display parameter change degrees of different display panels to determine the display parameter change amplitude of different display panels when the refresh frequency is switched.

[0134] In this embodiment, by measuring the image picture at a preset gray scale displayed by the display panel according to a preset measurement frequency, multiple display parameter information can be obtained. By adjusting the refresh frequency of the display panel during the measurement process, the multiple display parameter information can include display parameter information of the image pictures at different refresh frequencies. After distinguishing the first display parameter information at a first refresh frequency and the second display parameter information at a second refresh frequency from the multiple display parameter information, the display parameter change degree corresponding to the first display parameter information and the second display parameter information can be calculated according to the preset display parameter change algorithm, thereby quantifying the display parameter change amplitude of the display panel when the refresh frequency is switched. In addition, the user can also determine whether the user's needs are met based on the display parameter change degree, providing a unified evaluation standard for the user to select a suitable panel product.

[0135] Please refer to Figure 4 In some embodiments, before S110, the following steps may also be included:

[0136] S410, controlling the display panel to display a preset light-up picture at a first gray scale;

[0137] S420: When the display panel displays a preset lighting picture at the first gray scale for a preset lighting time, control the display panel to switch the first gray scale to a preset gray scale.

[0138] In this embodiment, before measuring the image at the preset grayscale displayed by the display panel, the display panel can be controlled to display a preset light-up image at the first grayscale. After the display panel displays the preset light-up image for a period of time, the display state of the display panel tends to be stable. At this time, the display panel can be controlled to display the image at the preset grayscale, and the image can be measured to obtain display parameter information of the image at different refresh rates.

[0139] In S410, the device may control the display panel to display a preset lighting picture at a first gray scale.

[0140] The first grayscale may be the highest grayscale within the grayscale range supported by the display panel, and the preset light-on picture may be a white picture. That is, under the preset light-on picture, sub-pixels of different colors in the display panel all maintain the maximum grayscale luminous brightness.

[0141] In S420, when the display panel displays the preset lit picture at the first gray scale for a preset lighting time, the display panel can be controlled to switch the first gray scale to the preset gray scale, and the preset lit picture to the corresponding image picture. At this time, the device can measure the image picture according to the preset measurement frequency, and switch the refresh frequency of the image picture during measurement, so as to measure and obtain multiple display parameter information corresponding to the image pictures at different refresh frequencies.

[0142] It is understandable that when the preset grayscale is consistent with the first grayscale, after the preset lighting picture is displayed for a preset lighting time, only the preset lighting picture is switched to the corresponding image picture without adjusting the grayscale.

[0143] The present application also provides a display parameter variation evaluation device, such as Figure 5 As shown, the device comprises:

[0144] The measuring module 501 is used to measure the image pictures at different refresh frequencies according to a preset measurement frequency when the display panel displays the image pictures at a preset gray scale, so as to obtain a plurality of display parameter information;

[0145] An acquisition module 502 is used to acquire, from a plurality of display parameter information, first display parameter information corresponding to an image at a first refresh rate and second display parameter information corresponding to a second refresh rate;

[0146] The calculation module 503 is used to calculate the display parameter change degree corresponding to the first display parameter information and the second display parameter information according to a preset display parameter change algorithm.

[0147] In some embodiments, the measurement module 501 may be a color analyzer.

[0148] Figure 6 A schematic diagram of the hardware structure of a display parameter change evaluation device provided in an embodiment of the present application is shown.

[0149] The display parameter variation evaluation device may include a processor 601 and a memory 602 storing computer program instructions.

[0150] Specifically, the processor 601 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0151] Memory 602 may include a large capacity memory for data or instructions. For example, and not limitation, memory 602 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) driver or a combination of two or more of these. In appropriate cases, memory 602 may include a removable or non-removable (or fixed) medium. In appropriate cases, memory 602 may be inside or outside a display parameter variation evaluation device. In a particular embodiment, memory 602 is a non-volatile solid-state memory.

[0152] In certain embodiments, the memory 602 may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage medium device, an optical storage medium device, a flash memory device, an electrical, optical or other physical / tangible memory storage device. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to an aspect of the present disclosure.

[0153] The processor 601 reads and executes the computer program instructions stored in the memory 602 to implement any one of the display parameter change amount evaluation methods in the above embodiments.

[0154] In one example, the display parameter change amount evaluation device may further include a communication interface 603 and a bus 610. Figure 6 As shown, the processor 601, the memory 602, and the communication interface 603 are connected via a bus 610 and communicate with each other.

[0155] The communication interface 603 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0156] Bus 610 includes hardware, software or both, and the parts of display parameter variation evaluation equipment are coupled to each other.For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In suitable cases, bus 610 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the application considers any suitable bus or interconnection.

[0157] In addition, in combination with the display parameter change amount evaluation method in the above embodiment, the embodiment of the present application can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any one of the display parameter change amount evaluation methods in the above embodiment is implemented.

[0158] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0159] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0160] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0161] Aspects of the present disclosure are described above with reference to the flowchart and / or block diagram of the method, device (system) and computer program product according to the embodiment of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0162] The above are only specific implementation methods of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A method for evaluating the change amount of display parameters, characterized in that: The method comprises: When the display panel displays an image at a preset grayscale, the image at different refresh frequencies is measured according to a preset measurement frequency to obtain a plurality of display parameter information; Acquire, from the plurality of display parameter information, first display parameter information corresponding to the image at a first refresh rate and second display parameter information corresponding to the image at a second refresh rate; Calculating the display parameter change degree corresponding to the first display parameter information and the second display parameter information according to a preset display parameter change algorithm; The acquiring, from the plurality of display parameter information, first display parameter information corresponding to the image at the first refresh rate and second display parameter information corresponding to the image at the second refresh rate comprises: From the plurality of display parameter information, sequentially calculating a measurement difference between each display parameter information and the next adjacent display parameter information; When the measured difference increases from within the preset error range to outside the preset error range, determining a first interval corresponding to the first refresh frequency according to a previous display parameter information of two display parameter information corresponding to the measured difference, and the measured difference between any two adjacent display parameter information in the first interval is less than the preset error range; Determine first display parameter information according to at least one display parameter information in the first interval; When the measured difference decreases from outside the preset error range to within the preset error range, determining a second interval corresponding to the second refresh frequency according to a previous display parameter information of two display parameter information corresponding to the measured difference, and the measured difference between any two adjacent display parameter information in the second interval is less than the preset error range; The second display parameter information is determined according to at least one display parameter information in the second interval.

2. The display parameter variation evaluation method according to claim 1, characterized in that: The display parameter variation evaluation method further includes: During the process of measuring the image screen, the first image signal output to the display panel is adjusted to a second image signal so that the display panel switches the first refresh frequency of the image screen to a second refresh frequency; the first refresh frequency and the second refresh frequency are both less than the preset measurement frequency.

3. The display parameter variation evaluation method according to claim 2, characterized in that: The measuring of the image pictures at different refresh frequencies according to the preset measurement frequency includes: Control the color analyzer to measure the image screens at different refresh frequencies according to the preset measurement frequency; The step of adjusting the first image signal output to the display panel to a second image signal includes: The control signal generator adjusts the first image signal output to the display panel into a second image signal.

4. The display parameter variation evaluation method according to claim 1, characterized in that: The display parameter information includes brightness information and / or chromaticity information, and the calculating, according to a preset display parameter variation algorithm, the display parameter variation degree corresponding to the first display parameter information and the second display parameter information includes: The brightness change degree corresponding to the first display parameter information and the second display parameter information is calculated according to a brightness change algorithm, and / or the chromaticity change degree corresponding to the first display parameter information and the second display parameter information is calculated according to a chromaticity change algorithm.

5. The display parameter variation evaluation method according to claim 4, characterized in that: The brightness change degree corresponding to the first display parameter information and the second display parameter information is calculated according to a brightness change algorithm, and the brightness change algorithm includes: D1=k1*|(Lv1-Lv2) / (Lv1+Lv2)|; Wherein, D1 is the brightness change degree, k1 is the conversion coefficient, Lv1 is the first brightness value in the first display parameter information, and Lv2 is the second brightness value in the second display parameter information.

6. The display parameter variation evaluation method according to claim 4, characterized in that: The color coordinates include color coordinates u' and v' of a CIE chromaticity diagram, and the chromaticity change degree corresponding to the first display parameter information and the second display parameter information is calculated according to a chromaticity change algorithm, and the chromaticity change algorithm includes: D2=Δu'v' / k2; Among them, D2 is the degree of chromaticity change, k2 is the conversion coefficient, and u i '、v i ' is the second color coordinate in the second display parameter information, u0' and v0' are the first color coordinate in the first display parameter information.

7. The display parameter variation evaluation method according to claim 1, characterized in that: Before measuring the image pictures at different refresh frequencies according to the preset measurement frequency, the method further includes: Controlling the display panel to display a preset light-up picture at a first gray scale; When the display panel displays a preset lighting picture at a first gray scale for a preset lighting time, the display panel is controlled to switch the first gray scale to the preset gray scale.

8. The display parameter variation evaluation method according to claim 7, characterized in that: The first grayscale is the highest grayscale, and the preset lighting picture is a white picture.

9. A display parameter variation evaluation device, characterized in that: The device comprises: A measuring module, used for measuring images at different refresh frequencies according to a preset measurement frequency when the display panel displays an image at a preset gray scale, so as to obtain a plurality of display parameter information; An acquisition module, configured to acquire, from the plurality of display parameter information, first display parameter information corresponding to the image at the first refresh rate and second display parameter information corresponding to the image at the second refresh rate; A calculation module, configured to calculate the display parameter change degrees corresponding to the first display parameter information and the second display parameter information according to a preset display parameter change algorithm; The acquisition module is used to calculate the measured difference between each display parameter information and the next adjacent display parameter information from the multiple display parameter information in sequence; when the measured difference increases from within a preset error range to outside the preset error range, determine the first interval corresponding to the first refresh frequency according to the previous display parameter information of the two display parameter information corresponding to the measured difference, and the measured difference between any two adjacent display parameter information in the first interval is less than the preset error range; determine the first display parameter information according to at least one display parameter information in the first interval; when the measured difference decreases from outside the preset error range to within the preset error range, determine the second interval corresponding to the second refresh frequency according to the previous display parameter information of the two display parameter information corresponding to the measured difference, and the measured difference between any two adjacent display parameter information in the second interval is less than the preset error range; determine the second display parameter information according to at least one display parameter information in the second interval.

10. A display parameter variation evaluation device, characterized in that: The display parameter variation evaluation device includes: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the display parameter change evaluation method according to any one of claims 1 to 8 is implemented.

11. A computer storage medium, characterized in that: The computer storage medium stores computer program instructions, and when the computer program instructions are executed by the processor, the display parameter change amount evaluation method according to any one of claims 1 to 8 is implemented.

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