Method and instrument for evaluating display consistency

Abstract

An embodiment of the present invention discloses a method and an instrument for evaluating display consistency. The method includes: using the instrument to detect the actually measured visual values of the first display area and the second display area of the sample; wherein, the first display area and the second display area are different display areas of the sample respectively; obtaining the visual evaluation values of the display consistency of the first display area and the second display area by the human eye; wherein, the visual evaluation values correspond to the actually measured visual values; constructing an evaluation fitting model based on the actually measured visual values and the visual evaluation values of multiple samples; and using the evaluation fitting model to evaluate the display consistency of the display panel to be evaluated. The technical solution provided by the embodiment of the present invention evaluates the display consistency of the display panel to be evaluated according to the evaluation fitting function, realizes the evaluation of the display consistency of the display panel by combining the actual measurement value with the visual evaluation of the human eye, and improves the comprehensiveness of the evaluation.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technology, and in particular, to a method and an instrument for evaluating display consistency. Background Art

[0002] With the market demand, display panels such as organic light emitting diodes (OLEDs) may include a main screen and a secondary screen, and the secondary screen may include components such as an in-screen camera and an in-screen fingerprint recognition.

[0003] In a display product including a main screen and a secondary screen, the consistency of the display between the main screen and the secondary screen is particularly required. However, the prior art only simply evaluates the consistency of the main and secondary screen displays by measuring the brightness difference and chromaticity difference, and there is a problem that the evaluation of the consistency of the main and secondary screen displays is not comprehensive enough. Summary of the Invention

[0004] Embodiments of the present invention provide a method and an instrument for evaluating display consistency to improve the comprehensiveness of evaluating the display consistency of a display panel.

[0005] In a first aspect, embodiments of the present invention provide a method for evaluating display consistency, including:

[0006] Using an instrument to detect the actual perceived values of a first display area and a second display area of a sample; wherein, the first display area and the second display area are different display areas of the sample respectively;

[0007] Obtaining the perceived evaluation value of the display consistency of the first display area and the second display area by the human eye; wherein, the perceived evaluation value corresponds to the actual perceived value;

[0008] Based on the actual perceived values and the perceived evaluation values of multiple samples, constructing an evaluation fitting model;

[0009] Using the evaluation fitting model to evaluate the display consistency of the display panel to be evaluated.

[0010] Optionally, the preset brightness of the first display area and the second display area is the same, and the preset chromaticity is the same; then the step of using an instrument to detect the actual perceived values of the first display area and the second display area of the sample includes:

[0011] Using an instrument to respectively obtain the actual brightness values of the first display area and the second display area of the sample;

[0012] Using an instrument to respectively obtain the actual chromaticity values of the first display area and the second display area of the sample.

[0013] Optionally, obtaining the visual evaluation value of the human eye on the display consistency of the first display area and the second display area includes:

[0014] Obtaining the visual evaluation value under a preset brightness and a preset chromaticity; wherein, the visual evaluation value is characterized as a visual consistency score for the brightness and chromaticity of the first display area and the second display area.

[0015] Optionally, the evaluation fitting model includes an evaluation fitting function, with the measured visual value as the independent variable of the evaluation fitting function and the visual evaluation value as the dependent variable of the evaluation fitting function.

[0016] Optionally, the construction of the evaluation fitting function includes:

[0017] Calculating the brightness difference value between the first display area and the second display area according to the measured brightness value of the first display area and the measured brightness value of the second display area;

[0018] Calculating the chromaticity difference value between the first display area and the second display area according to the measured chromaticity value of the first display area and the measured chromaticity value of the second display area;

[0019] Fitting the brightness difference value, the chromaticity difference value and the visual evaluation value to obtain the evaluation fitting function; in the evaluation fitting function, the brightness difference value and the chromaticity difference value are independent variables, and the human eye visual evaluation value is the dependent variable.

[0020] Optionally, according to the measured brightness value of the first display area and the measured brightness value of the second display area, calculating the brightness difference value x between the first display area and the second display area,

[0021] x = |(L1 - L2) / (L1 + L2) / A|

[0022] where L1 is the measured brightness value of the first display area, L2 is the measured brightness value of the second display area; A is a constant;

[0023] According to the measured chromaticity value of the first display area and the measured chromaticity value of the second display area, calculating the chromaticity difference value y between the first display area and the second display area,

[0024]

[0025] where U1 and V1 are the chromaticity coordinates of the measured first display area, and U2 and V2 are the chromaticity coordinates of the measured second display area; B is a constant.

[0026] Optionally, using the evaluation fitting model to evaluate the display consistency of the display panel to be evaluated includes:

[0027] Obtain the actual measured values of the visual perception of the first display area and the second display area of the display panel to be evaluated;

[0028] Substitute the actual measured value of the visual perception into the evaluation fitting function to calculate the visual perception evaluation value of the display panel to be evaluated.

[0029] Optionally, the preset brightness of the first display area and the second display area is the same, and the preset chromaticity is the same; detecting the actual measured value of the visual perception of the display panel to be evaluated and substituting the actual measured value of the visual perception into the evaluation fitting function to calculate the visual perception evaluation value of the display panel to be evaluated includes:

[0030] Obtain the actual measured brightness values of the first display area and the second display area of the display panel to be evaluated, and calculate the brightness difference value between the first display area and the second display area;

[0031] Obtain the actual measured chromaticity values of the first display area and the second display area of the display panel to be evaluated, and calculate the chromaticity difference value between the first display area and the second display area;

[0032] Calculate the visual perception evaluation value of the display panel to be evaluated according to the brightness difference value and the chromaticity difference value of the display panel to be evaluated and in combination with the evaluation fitting function.

[0033] Optionally, before using the instrument to detect the actual measured values of the visual perception of the first display area and the second display area of the evaluation sample, it further includes:

[0034] Divide the display levels according to the display effects of all display screens;

[0035] Arbitrarily select at least one display screen from each display level as a sample.

[0036] In a second aspect, an embodiment of the present invention provides an evaluation instrument for display consistency, including

[0037] An actual measured value acquisition unit for visual perception, configured to detect the actual measured values of the visual perception of the first display area and the second display area of the sample; wherein, the first display area and the second display area are different display areas of the sample respectively;

[0038] A visual perception evaluation value acquisition unit, configured to obtain the visual perception evaluation value of the human eye on the display consistency of the first display area and the second display area; wherein, the visual perception evaluation value corresponds to the actual measured value of the visual perception;

[0039] An evaluation fitting model construction unit, configured to construct an evaluation fitting model based on the actual measured values of the visual perception and the visual perception evaluation values of multiple samples;

[0040] An evaluation unit for evaluating the display consistency of the display panel to be evaluated by using the evaluation fitting model.

[0041] An embodiment of the present invention provides a method and an instrument for evaluating display consistency. The method includes: using the instrument to detect the actually measured visual values of the first display area and the second display area of the sample; wherein, the first display area and the second display area are different display areas of the sample respectively; obtaining the visual evaluation values of the display consistency of the first display area and the second display area by the human eye; wherein, the visual evaluation values correspond to the actually measured visual values; constructing an evaluation fitting model based on the actually measured visual values and the visual evaluation values of multiple samples; and evaluating the display consistency of the display panel to be evaluated by using the evaluation fitting model. It can be seen that the evaluation fitting model provided by the embodiment of the present invention is constructed based on the actually measured visual values and the visual evaluation values, and the evaluation fitting model reflects the relationship between the actually measured visual values and the visual evaluation values. By substituting the actually measured visual values into the evaluation fitting function, the evaluation of the display consistency of the display panel to be evaluated by the human eye can be obtained. Therefore, the embodiment of the present invention is not limited to the results of instrument measurement. On the basis of the instrument measurement results (i.e., the actually measured visual values), the display consistency of the first display area and the second display area is evaluated by combining the viewing effect of the human eye, thereby improving the comprehensiveness and accuracy of the evaluation. In addition, the embodiment of the present invention does not need to perform complex modeling and analysis for the characteristics of the human eye perception. The evaluation fitting model can be obtained through the fitting of multiple groups of actually measured visual values and visual evaluation values. The operation method is simple and the practicability is strong. Description of the Drawings

[0042] Figure 1 is a schematic structural diagram of a display panel provided in the prior art;

[0043] Figure 2 is a flowchart of a method for evaluating display consistency provided by an embodiment of the present invention;

[0044] Figure 3 is a flowchart of another method for evaluating display consistency provided by an embodiment of the present invention;

[0045] Figure 4 is a comparison chart of actual scores and fitting scores provided by an embodiment of the present invention;

[0046] Figure 5 is a relationship coordinate chart of the acceptability of the display effect and influencing factors provided by an embodiment of the present invention;

[0047] Figure 6 is a flowchart of another method for evaluating display consistency provided by an embodiment of the present invention;

[0048] Figure 7It is a structural block diagram of an evaluation device for display consistency provided by an embodiment of the present invention. Detailed implementation manners

[0049] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only the parts related to the present invention rather than all the structures are shown in the drawings.

[0050] Figure 1 It is a structural schematic diagram of a display panel provided in the prior art. Referring to Figure 1 , the OLED display panel may include a main screen 10 and a secondary screen 20, such as products like an under-device camera (UDC) or an under-screen fingerprint recognition component, etc. Taking the example that a camera is provided in the secondary screen 20, due to the presence of the camera, the pixel arrangement of the secondary screen 20 is different from that of the main screen 10. Along the row direction, the number of pixels connected by the scan lines in the secondary screen 20 is different from the number of pixels connected by the scan lines in the main screen 10, that is, the load of the scan lines in the main screen 10 is different from the load of the scan lines in the main screen 10. Therefore, it is easy to have a problem of inconsistent display between the display area of the main screen 10 and the display area of the secondary screen 20.

[0051] A method for evaluating the display consistency between the main and secondary screens needs to be found. In the prior art, the display consistency between the main screen 10 and the secondary screen 20 is simply evaluated by measuring the brightness difference or the chromaticity difference between the main screen 10 and the secondary screen 20 with measuring instruments. However, the sensitivity of the human eye to brightness difference and chromaticity difference presents a non-linear characteristic. Therefore, the lack of combining the visual perception evaluation of the human eye in the prior art cannot comprehensively and accurately evaluate the display consistency between the main and secondary screens 20.

[0052] Based on the above problems, an embodiment of the present invention provides an evaluation method for display consistency. Figure 2 It is a flowchart of an evaluation method for display consistency provided by an embodiment of the present invention. Referring to Figure 2 , the evaluation method includes the following steps:

[0053] S110. Use an instrument to detect the actually measured visual values of the first display area and the second display area of the sample.

[0054] Among them, the first display area and the second display area are different display areas of the sample. That is, the sample used refers to a display screen including the first display area and the second display area. For example, the display screen includes a main screen and a secondary screen; the main screen is defined as the first display area, which is most of the display screen area; the secondary screen is defined as the second display area, which is a small part of the display screen area. The secondary screen includes areas such as an under-screen camera, an under-screen fingerprint recognition sensor, or the edge part of an irregular display screen. For the same sample, due to reasons such as different pixel arrangements, different film layer structures, or different light-emitting methods between the secondary screen and the main screen, it is easy to have problems with inconsistent displays between the main screen and the secondary screen. For different samples, due to reasons such as process differences, there will also be differences in their displays under the same driving conditions. That is to say, there are differences in the display uniformity of the main and secondary screens of different samples, and it is necessary to evaluate the display uniformity of each sample.

[0055] The actually measured values of the visual perception represent the factors affecting the display consistency and can be obtained by measuring instruments. Exemplarily, the factors affecting the display consistency include factors representing colors such as brightness and chromaticity, which are the actual display data of the display screen. Therefore, the actually measured values of the visual perception contain the objectivity of the display consistency evaluation.

[0056] S120. Obtain the visual perception evaluation values of the display consistency of the first display area and the second display area by the human eye.

[0057] Among them, the visual perception evaluation values correspond to the actually measured values of the visual perception. The visual perception evaluation value is an evaluation obtained based on the human eye's evaluation of the display consistency of the first display area and the second display area of the sample. For example, if the human eye's visual perception believes there is no difference at all, the visual perception evaluation value of this sample is recorded as 0 points; if the human eye's visual perception believes the difference is the largest, the visual perception evaluation value of this sample is recorded as 5 points; another example is that the human eye can accept or not accept the display difference. That is to say, under the same driving conditions, one sample corresponds to a set of actually measured values of the visual perception and also corresponds to a visual perception evaluation value. In the embodiments of the present invention, given objective display data, combined with the human eye's evaluation of the display consistency of the first display area and the second display area of the display screen, it can accurately reflect the true consistency of the main and secondary screens for the user.

[0058] S130. Based on the actually measured values of the visual perception and the visual perception evaluation values of multiple said samples, construct a measurement and evaluation fitting model.

[0059] Among them, as can be seen from the foregoing steps, each sample corresponds to a set of visual evaluation values and visual measured values. Obtaining multiple sets of visual measured values and visual evaluation values, that is, obtaining the visual evaluation values and visual measured values of multiple samples respectively, a measurement fitting model can be obtained by fitting these multiple sets of data. Optionally, the measurement fitting model includes a measurement fitting function, with the visual measured value as the independent variable of the measurement fitting function and the visual evaluation value as the dependent variable of the measurement fitting function. The method of obtaining the measurement fitting function model by fitting these multiple sets of data may include: obtaining multiple sets of visual measured values and the visual evaluation values, using the visual measured values as the independent variable and the visual evaluation values as the dependent variable, and fitting to obtain the measurement fitting function. For example, the multiple sets of visual measured values and visual evaluation values can be fitted through excel data processing to obtain the coefficient of the independent variable and the constant term in the measurement fitting function, thereby obtaining the measurement fitting function. It is also possible to use mathematical software such as MATLAB to fit the multiple sets of visual measured values and visual evaluation values to obtain the measurement fitting function. The present invention does not limit the fitting method. The obtained measurement fitting function uses the visual measured value as the independent variable and the visual evaluation value as the dependent variable.

[0060] S140. Use the measurement fitting model to evaluate the display consistency of the display panel to be measured.

[0061] Specifically, the measurement fitting model is constructed based on the visual measured values and visual evaluation values, and the measurement fitting model reflects the relationship between the visual measured values and visual evaluation values. By substituting the visual measured values into the measurement fitting function, an evaluation of the display consistency of the display panel to be measured by the human eye can be obtained. Generally, for a sample, if the visual measured value is within a certain preset range, the visual evaluation is relatively high; if the visual measured value exceeds a certain range, the visual evaluation is relatively low. However, the data of the visual measured values of the samples obtained through experiments are limited and exist in the form of points in the coordinate system, and cannot cover all the visual measured values of the display panels to be measured. The embodiment of the present invention obtains more data of the visual measured values and their corresponding visual evaluation values through the measurement fitting model, which exist in the form of a line in the coordinate system. That is to say, in the process of evaluating the display consistency of the display panel to be measured, the visual measured value obtained by instrument measurement is substituted into the measurement fitting function to obtain the visual evaluation value of the human eye.

[0062] A display consistency evaluation method provided by an embodiment of the present invention includes: using an instrument to detect the actually measured visual values of the first display area and the second display area of a sample; wherein, the first display area and the second display area are different display areas of the sample respectively; obtaining the visual evaluation value of the display consistency of the first display area and the second display area by the human eye; wherein, the visual evaluation value corresponds to the actually measured visual value; constructing an evaluation fitting model based on the actually measured visual values and the visual evaluation values of a plurality of the samples; using the evaluation fitting model to evaluate the display consistency of the display panel to be evaluated. It can be seen that the evaluation fitting function provided by the embodiment of the present invention uses the actually measured visual value as the independent variable and the visual evaluation value as the dependent variable. By substituting the actually measured visual value into the evaluation fitting function, the evaluation of the display consistency of the display panel to be evaluated by the human eye can be obtained. Therefore, the embodiment of the present invention is not limited to the result of instrument measurement. On the basis of the instrument measurement result (i.e., the actually measured visual value), the display consistency of the first display area and the second display area is evaluated by combining the viewing effect of the human eye, thereby improving the comprehensiveness and accuracy of the evaluation. In addition, the embodiment of the present invention does not need to perform complex modeling and analysis for the characteristics of the human eye perception. The evaluation fitting function model can be obtained by fitting multiple groups of actually measured visual values and visual evaluation values. The operation method is simple and the practicability is strong.

[0063] Figure 3 It is a flowchart of another display consistency evaluation method provided by an embodiment of the present invention. On the basis of the above embodiments, the embodiment of the present invention specifically defines the factors affecting display consistency and explains the corresponding evaluation fitting function. Refer to Figure 3 , the method includes:

[0064] S210. Use an instrument to respectively obtain the actually measured brightness values of the first display area and the second display area of the sample; use an instrument to respectively obtain the actually measured chromaticity values of the first display area and the second display area of the sample.

[0065] Among them, the display effects that mainly affect the display screen include two factors, namely the brightness and chromaticity of the display screen. The driving conditions of the first display area and the second display area are the same, that is, the preset brightness is the same, and the preset chromaticity is the same. That is, the target brightness and target chromaticity of the main screen and the secondary screen of the display screen are consistent. Due to the different number of pixels connected by the scan lines in the secondary screen and the number of pixels connected by the scan lines in the main screen, and the different loads of the scan lines in the main screen and the scan lines in the main screen, under the same driving voltage, there is a display inconsistency between the display area of the main screen and the display area of the secondary screen, that is, the brightness and chromaticity are inconsistent. Instruments such as brightness and chromaticity meters can be used to obtain the measured brightness values of the first display area and the second display area of the sample, and the measured chromaticity values of the first display area and the second display area. The measured brightness values and the measured chromaticity values are a set of measured visual perception values. The technical solution provided by the embodiments of the present invention combines the brightness and chromaticity of the display screen to evaluate the display consistency of the main and secondary screens, and further improves the comprehensiveness of the evaluation.

[0066] S220. Obtain a visual perception evaluation value under a preset brightness and a preset chromaticity; wherein the visual perception evaluation value is characterized as a visual perception consistency score for the brightness and chromaticity of the first display area and the second display area.

[0067] Among them, obtaining the visual perception evaluation value under the preset brightness and the preset chromaticity means obtaining the visual perception evaluation value of the human eye for the first display area and the second display area under the same target brightness and target chromaticity. Based on the visual perception of the human eye, a score is artificially given to the display consistency of the first display area and the second display area of the sample. Combining the degree of difference in brightness and chromaticity between the first display area and the second display area, different scores are given from the largest degree of difference to the smallest degree of difference. For example, if the visual perception of the human eye believes that there is no difference at all, the visual perception evaluation value of this sample is recorded as 0 points, and if the visual perception of the human eye believes that the difference is the largest, the visual perception evaluation value of this sample is recorded as 5 points. The consistency of the main and secondary screens of the sample can be scored by several professional personnel or ordinary users to obtain multiple visual perception evaluation values, and the average value of the multiple visual perception evaluation values is calculated, and the average value of the multiple visual perception evaluation values is used as the final visual perception evaluation value. The accuracy of evaluating the display consistency of the main and secondary screens can be further improved.

[0068] S230. Calculate the brightness difference value between the first display area and the second display area according to the measured brightness value of the first display area and the measured brightness value of the second display area.

[0069] Optionally, calculating the brightness difference value between the first display area and the second display area according to the measured brightness value of the first display area and the measured brightness value of the second display area is determined based on the following:

[0070] x = |(L1 - L2) / (L1 + L2) / A|; where L1 is the measured brightness value of the first display area, L2 is the measured brightness value of the second display area, and A is a constant.

[0071] Among them, since the human eye is more sensitive to the brightness of the display area when the brightness is relatively dim. Therefore, when the preset brightness is relatively dim, the human eye is more sensitive to the brightness difference between the first display area and the second display area. When the preset brightness is relatively bright, the sensitivity of the human eye to the brightness difference between the first display area and the second display area is relatively poor. When the preset brightness is relatively dim, the difference between the measured actual brightness value of the first display area and the measured actual brightness value of the second display area by the instrument is equal to the difference between the measured actual brightness value of the first display area and the measured actual brightness value of the second display area by the instrument when the preset brightness is relatively bright. However, the visual perception of the difference in brightness between the first display area and the second display area by the human eye when the preset brightness is relatively dim is different from the visual perception of the difference in brightness between the first display area and the second display area by the human eye when the preset brightness is relatively bright. That is to say, although the difference in the measured brightness between the first display area and the second display area is equal when the preset brightness is relatively dim and when the preset brightness is relatively bright, the visual perception of the human eye is that the brightness difference between the first display area and the second display area is more obvious when the preset brightness is relatively dim. Therefore, the brightness difference value between the first display area and the second display area is calculated based on the measured actual brightness value of the first display area and the measured actual brightness value of the second display area, and is determined based on the formula x = |(L1 - L2) / (L1 + L2) / A|, where A is a constant, for example, it can be 0.004, and the unit of the brightness difference value is JND. This can make the brightness difference obtained by measuring the first display area and the second display area match the brightness difference obtained by the visual perception of the human eye. Thus, the accuracy of evaluating the display consistency of the main and secondary screens can be further improved.

[0072] S240. Calculate the chromaticity difference value between the first display area and the second display area according to the measured actual chromaticity value of the first display area and the measured actual chromaticity value of the second display area.

[0073] Optionally, calculating the chromaticity difference value between the first display area and the second display area according to the measured actual chromaticity value of the first display area and the measured actual chromaticity value of the second display area is determined based on the following:

[0074] where U1 and V1 are the chromaticity coordinates of the measured first display area, and U2 and V2 are the chromaticity coordinates of the measured second display area, and B is a constant.

[0075] Specifically, the chromaticity coordinate is the coordinate of a color. The horizontal axis is U and the vertical axis is V, and a coordinate point can be determined on the chromaticity diagram. This coordinate point precisely represents the emitting color, that is, the chromaticity coordinate precisely represents the chromaticity of the color. U1 and V1 are the chromaticity coordinates of the measured first display area, and U2 and V2 are the chromaticity coordinates of the measured second display area. Based on the formula The chromaticity difference value between the first display area and the second display area can be calculated, where B is a constant, for example, it can be 0.004, and the unit of the chromaticity difference value is JNCD.

[0076] S250. Fit the luminance difference value, chromaticity difference value, and visual perception evaluation value to obtain an evaluation fitting function. In the evaluation fitting function, the luminance difference value and chromaticity difference value are independent variables, and the human eye visual perception evaluation value is the dependent variable.

[0077] Among them, obtain the luminance difference value, chromaticity difference value, and visual perception evaluation value of multiple samples. Take the luminance difference value and chromaticity difference value as independent variables, and the human eye visual perception evaluation value as the dependent variable. Fit the luminance difference value, chromaticity difference value, and visual perception evaluation value to obtain an evaluation fitting function. For example, Table 1 shows the fitting data and fitting results corresponding to 30 samples. The fitting data includes the luminance difference value x, chromaticity difference value y, and visual perception evaluation value z1, and the fitting result is the visual perception evaluation value z2 calculated through the evaluation fitting function. Obtain the luminance difference value x and chromaticity difference value y of 30 samples, and manually score the consistency degree of the main and secondary screens of these samples. A score of 0 is given for no difference at all, and a score of 5 is given for the largest difference, to obtain the visual perception evaluation value z1 of each sample. Then perform fitting through excel data processing; obtain the coefficient of the independent variable x (JND), the coefficient of the independent variable y (JNCD), and the constant term, thereby determining the evaluation fitting function of the sample. The obtained evaluation fitting function is z = 0.3x + 0.222y + 0.843. Substitute the luminance difference value x and chromaticity difference value y of each sample into the evaluation fitting function to calculate the visual perception evaluation value z2 corresponding to each sample calculated through the evaluation fitting function. Figure 4 is a comparison chart of the actual score and the fitting score provided by an embodiment of the present invention. Refer to Figure 4 , where the broken line A is the actual score obtained by the human eye scoring the visual consistency of the luminance and chromaticity of the first display area and the second display area; the broken line B is the fitting score calculated through the evaluation fitting function for the visual consistency of the luminance and chromaticity of the first display area and the second display area. From Table 1 and Figure 4 it can be seen that the visual perception evaluation value z2 calculated through the evaluation fitting function is close to the visual perception evaluation value of the human eye. Therefore, the evaluation fitting function can be used to evaluate the display consistency of the display panel to be evaluated.

[0078] Table 1

[0079] x y z1 z2 1 6.4 1.9 3.5 3.2 2 9.6 1 4 4 3 4.7 1 2 2.5 4 5.5 1.9 3 2.9 5 9.1 1.3 4 3.9 6 10.8 1 4.5 4.3 7 11.9 1.2 5 4.7 8 10.9 1.3 4.5 4.4 9 9.9 1.6 4 4.2 10 10.2 1.6 4.5 4.3 11 13 0.8 5 4.9 12 7.7 1.2 3.5 3.4 13 6.8 2.2 3.5 3.4 14 3.4 2.2 2 2.3 15 10 2.1 4 4.3 16 9.7 1.4 4 4.1 17 8.6 1.6 3.5 3.8 18 12.9 0.6 5 4.9 19 11.9 1.2 4.5 4.7 20 10.1 1.1 4 4.1 21 5.7 1.8 3 3 22 9 1.7 4 3.9 23 7.3 1.7 3.5 3.4 24 9.5 1.6 4 4 25 5.7 2.2 3 3 26 13.6 1.3 5 5.2 27 6.5 1.7 3 3.2 28 11.1 1.4 4.5 4.5 29 6.1 1.5 3 3 30 11 1.6 4.5 4.4

[0080] S260. Use the evaluation fitting model to evaluate the display consistency of the display panel to be evaluated.

[0081] The technical solution provided by the embodiment of the present invention obtains the brightness difference values, chromaticity difference values, and visual evaluation values of multiple samples. Taking the brightness difference values and chromaticity difference values as independent variables and the human eye visual evaluation value as the dependent variable, it fits the brightness difference values, chromaticity difference values, and visual evaluation values to obtain an evaluation fitting function. And when calculating the brightness difference values and chromaticity difference values, considering the different sensitivities of the human eye to the display area at different brightness values and different chromaticity values, the formula adopted can make the brightness difference obtained by measurement in the first display area and the second display area match the brightness difference obtained by the human eye's visual perception, and make the chromaticity difference obtained by measurement in the first display area and the second display area match the chromaticity difference obtained by the human eye's visual perception. Thereby, the accuracy of evaluating the display consistency between the main and secondary screens can be further improved.

[0082] Figure 5 is a coordinate diagram of the relationship between the acceptability of the display effect and influencing factors provided by the embodiment of the present invention. Refer to Figure 5 , the factors affecting the human eye's perception of the first display area and the second display area mainly include the brightness and chromaticity of the display screen. Correspondingly, the abscissa represents the brightness difference value, and the ordinate represents the chromaticity difference value; the visual evaluation value includes acceptable and unacceptable. Exemplarily, the brightness difference and chromaticity difference within the black area are the acceptable degrees for the human eye, and the brightness difference and chromaticity difference in other areas are the unacceptable degrees for the human eye. It can be seen that the greater the brightness difference and chromaticity difference between the first display area and the second display area, the less acceptable the display consistency of the display screen is to the human eye.

[0083] Figure 6 is a flowchart of another display consistency evaluation method provided by the embodiment of the present invention. Refer to Figure 6 , on the basis of the above-mentioned embodiments, optionally, the evaluation method includes:

[0084] S310. Divide the display levels according to the display effects of all display screens; select at least one display screen from each display level as a sample.

[0085] Among them, after all products are produced, at a preset brightness and preset chromaticity, divide the display levels according to the display effects of all display screens. For example, if the display levels are divided into 30 according to the display effects of all display screens, and 1 display screen is arbitrarily selected from each level as a sample, then there are 30 display screens as samples; if 2 display screens are arbitrarily selected from each level as samples, then there are 60 display screens as samples. Selecting at least one display screen from each display level as a sample ensures that the obtained evaluation fitting function covers all display levels of the display screen, thereby further improving the comprehensiveness and accuracy of the evaluation fitting function in evaluating the display consistency of the display panel to be evaluated.

[0086] S320. Measure the actual visual values of the first display area and the second display area of the sample using an instrument; wherein, the first display area and the second display area are different display areas of the sample respectively.

[0087] S330. Obtain the visual evaluation value of the display consistency of the first display area and the second display area by the human eye; wherein, the visual evaluation value corresponds to the actual visual value.

[0088] S340. Construct an evaluation fitting model based on the actual visual values and visual evaluation values of multiple samples.

[0089] S350. Obtain the actual visual values of the first display area and the second display area of the display panel to be evaluated, and substitute the actual visual values into the evaluation fitting function to calculate the visual evaluation value of the display panel to be evaluated.

[0090] Among them, the evaluation fitting function can evaluate the display consistency of the main and secondary screens of all products. By measuring the actual visual values of the main and secondary screens, that is, the first display area and the second display area, and then using the evaluation fitting function, the visual evaluation value based on the human eye perception can be calculated. There is no need for artificial evaluation, thus avoiding the waste of human resources. Moreover, due to the influence of human subjective judgment, different times and different visual inspection personnel will affect the results, while this method of quantifying the limit specifications will not have such an impact.

[0091] Optionally, the influencing factors include brightness and chromaticity. The preset brightness of the first display area and the second display area is the same, and the preset chromaticity is the same; measuring the actual visual value of the display panel to be evaluated, and substituting the actual visual value into the evaluation fitting function to calculate the visual evaluation value of the display panel to be evaluated includes:

[0092] Obtain the measured brightness values of the first display area and the second display area of the display panel to be evaluated, and calculate the brightness difference value between the first display area and the second display area;

[0093] Obtain the measured chromaticity values of the first display area and the second display area of the display panel to be evaluated, and calculate the chromaticity difference value between the first display area and the second display area;

[0094] Calculate the visual evaluation value of the display panel to be evaluated according to the brightness difference value and chromaticity difference value of the display panel to be evaluated and in combination with the evaluation fitting function.

[0095] Among them, obtaining the measured brightness values of the first display area and the second display area of the display panel to be evaluated, and calculating the brightness difference value between the first display area and the second display area is the same as the above step S240, and can be determined based on the formula: x = |(L1 - L2) / (L1 + L2)|; where L1 is the brightness value of the first display area of the display panel to be evaluated measured, and L2 is the brightness value of the second display area of the display panel to be evaluated measured, which will not be elaborated here. Similarly, obtaining the measured chromaticity values of the first display area and the second display area of the display panel to be evaluated, and calculating the chromaticity difference value between the first display area and the second display area is the same as the above step S250, and can be based on the formula determined; where U1 and V1 are the chromaticity coordinates of the first display area of the display panel to be evaluated measured, and U2 and V2 are the chromaticity coordinates of the second display area of the display panel to be evaluated measured, which will not be elaborated here. Substituting the brightness difference value x and the chromaticity difference value y of the display panel to be evaluated into the evaluation fitting function, the perceived evaluation value corresponding to the display panel to be evaluated calculated by the evaluation fitting function can be calculated. There is no need for manual evaluation, thus avoiding the waste of human resources. It comprehensively considers and characterizes the display effect differences brought by brightness and chromaticity to the main and secondary screens, and at the same time combines the human eye's perceived evaluation to evaluate the display consistency of the display panel, improving the comprehensiveness and accuracy of the evaluation.

[0096] An embodiment of the present invention provides an evaluation instrument for display consistency, which is used to execute the evaluation method for display consistency described in any of the above embodiments, Figure 7 is a structural block diagram of an evaluation device for display consistency provided by an embodiment of the present invention. Refer to Figure 7 , the evaluation device includes:

[0097] A perceived measured value acquisition unit 100, which is used to detect the perceived measured values of the first display area and the second display area of the sample; where the first display area and the second display area are different display areas of the sample respectively;

[0098] A perceived evaluation value acquisition unit 200, which is used to obtain the perceived evaluation value of the human eye on the display consistency of the first display area and the second display area; where the perceived evaluation value corresponds to the perceived measured value;

[0099] An evaluation fitting model construction unit 300, which is used to construct an evaluation fitting model based on the perceived measured values and perceived evaluation values of multiple samples;

[0100] An evaluation unit 400, which is used to evaluate the display consistency of the display panel to be evaluated by using the evaluation fitting model.

[0101] Among them, the evaluation instrument for display consistency includes a visual perception actual measurement value acquisition unit 100, which can detect the first display area and the second display area of the sample to obtain visual perception actual measurement values. Among them, the first display area and the second display area are different display areas of the sample respectively. The evaluation instrument for display consistency further includes a visual perception evaluation value acquisition unit. After obtaining the visual perception evaluation value of the display consistency of the first display area and the second display area of the sample based on the human eye, the visual perception evaluation value is sent to the visual perception evaluation value acquisition unit 200, and the visual perception evaluation value acquisition unit 200 can receive the visual perception evaluation value of the display consistency of the first display area and the second display area from the human eye. Among them, the visual perception evaluation value of a sample corresponds to the visual perception actual measurement value of the sample. After obtaining the visual perception evaluation values and visual perception actual measurement values of multiple samples, the evaluation fitting model construction unit 300 is used to construct an evaluation fitting model based on the visual perception actual measurement values and visual perception evaluation values of multiple samples. The evaluation fitting model construction unit 300 can, according to multiple groups of visual perception actual measurement values and visual perception evaluation values, take the visual perception actual measurement values as independent variables and the visual perception evaluation values as dependent variables, and fit to obtain an evaluation fitting function.

[0102] In the evaluation mode, the visual perception actual measurement value acquisition unit 100 of the evaluation instrument can detect the visual perception actual measurement values of the first display area and the second display area of the display panel to be evaluated. At this time, the calculation unit 300 can, according to the evaluation fitting function and the visual perception actual measurement values of the display panel to be evaluated, and the evaluation unit 400 uses the evaluation fitting model to calculate the visual perception evaluation value according to the visual perception actual measurement values of the display panel to be evaluated, so as to evaluate the display consistency of the display panel to be evaluated. The evaluation instrument combines the visual perception evaluation of the human eye to evaluate the display consistency of the display panel, improves the comprehensiveness and accuracy of the evaluation, and does not require manual evaluation, thus avoiding the waste of human resources.

[0103] The evaluation instrument for display consistency provided by the embodiment of the present invention obtains multiple groups of visual perception actual measurement values and visual perception evaluation values, takes the visual perception actual measurement values as independent variables and the visual perception evaluation values as dependent variables, and fits to obtain an evaluation fitting function; by substituting the visual perception actual measurement values into the evaluation fitting function, the evaluation of the display consistency of the display panel to be evaluated by the human eye can be obtained. Therefore, the embodiment of the present invention combines the viewing effect of the human eye to evaluate the display consistency of the first display area and the second display area on the basis of the instrument measurement result (i.e., the visual perception actual measurement value), thereby improving the comprehensiveness and accuracy of the evaluation. In addition, the embodiment of the present invention does not need to perform complex modeling and analysis for the characteristics of the human eye perception, and can obtain an evaluation fitting model through the fitting of multiple groups of visual perception actual measurement values and visual perception evaluation values. The operation method is simple and the practicability is strong. It does not require manual evaluation, thus avoiding the waste of human resources.

[0104] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for evaluating display consistency, characterized in that, Including: Using an instrument to detect the actual measured values of the visual perception of the first display area and the second display area of the sample; wherein, the first display area and the second display area are different display areas of the sample respectively; Obtaining the visual perception evaluation value of the display consistency of the first display area and the second display area of the sample by the human eye; wherein, the visual perception evaluation value corresponds to the actual measured value of the visual perception; Based on the actual measured values of the visual perception and the visual perception evaluation values of multiple samples, constructing an evaluation fitting model; Using the evaluation fitting model to evaluate the display consistency of the display panel to be evaluated; The preset brightness of the first display area and the second display area is the same, and the preset chromaticity is the same; then the actual measured values of the visual perception of the first display area and the second display area of the sample detected by the instrument include: Using an instrument to respectively obtain the actual measured brightness values of the first display area and the second display area of the sample; Using an instrument to respectively obtain the actual measured chromaticity values of the first display area and the second display area of the sample; The evaluation fitting model includes an evaluation fitting function, the actual measured value of the visual perception is used as the independent variable of the evaluation fitting function, and the visual perception evaluation value is used as the dependent variable of the evaluation fitting function; The construction of the evaluation fitting function includes: According to the actual measured brightness value of the first display area and the actual measured brightness value of the second display area, calculating the brightness difference value between the first display area and the second display area; According to the actual measured chromaticity value of the first display area and the actual measured chromaticity value of the second display area, calculating the chromaticity difference value between the first display area and the second display area; Fitting the brightness difference value, the chromaticity difference value and the visual perception evaluation value to obtain the evaluation fitting function; in the evaluation fitting function, the brightness difference value and the chromaticity difference value are independent variables, and the human eye visual perception evaluation value is the dependent variable.

2. The evaluation method for display consistency according to claim 1, characterized in that, The obtaining of the visual perception evaluation value of the display consistency of the first display area and the second display area by the human eye includes: Obtaining the visual perception evaluation value under the preset brightness and the preset chromaticity; wherein, the visual perception evaluation value is characterized as the visual perception consistency score for the brightness and chromaticity of the first display area and the second display area.

3. The evaluation method for display consistency according to claim 1, characterized in that The calculating of the brightness difference value x between the first display area and the second display area according to the actual measured brightness value of the first display area and the actual measured brightness value of the second display area, x = |(L1 - L2) / (L1 + L2) / A| wherein L1 is the measured brightness value of the first display area, L2 is the measured brightness value of the second display area; A is a constant; The calculating of the chromaticity difference value y between the first display area and the second display area according to the actual measured chromaticity value of the first display area and the actual measured chromaticity value of the second display area, wherein U1 and V1 are the chromaticity coordinates of the measured first display area, U2 and V2 are the chromaticity coordinates of the measured second display area; B is a constant.

4. The evaluation method for display consistency according to claim 1, wherein The using of the evaluation fitting model to evaluate the display consistency of the display panel to be evaluated includes: Obtaining the actual measured values of the visual perception of the first display area and the second display area of the display panel to be evaluated; Substituting the actual measured value of the visual perception into the evaluation fitting model to calculate the visual perception evaluation value of the display panel to be evaluated.

5. The evaluation method for display consistency according to claim 4, wherein The preset brightness of the first display area and the second display area is the same, and the preset chromaticity is the same; detecting the actual perception value of the display panel to be evaluated, and substituting the actual perception value into the evaluation fitting function to calculate the perception evaluation value of the display panel to be evaluated, including: Obtaining the actual measured brightness values of the first display area and the second display area of the display panel to be evaluated, and calculating the brightness difference value between the first display area and the second display area; Obtaining the actual measured chromaticity values of the first display area and the second display area of the display panel to be evaluated, and calculating the chromaticity difference value between the first display area and the second display area; Calculating the perception evaluation value of the display panel to be evaluated according to the brightness difference value and the chromaticity difference value of the display panel to be evaluated and in combination with the evaluation fitting function.

6. The evaluation method for display consistency according to claim 1, wherein Before using the instrument to detect the actual perception values of the first display area and the second display area of the evaluation sample, it further includes: Dividing the display levels according to the display effects of all display screens; Arbitrarily selecting at least one display screen from each display level as a sample.

7. A display consistency evaluation instrument, characterized in that, Including An actual perception value acquisition unit for detecting the actual perception values of the first display area and the second display area of the sample; wherein, the first display area and the second display area are different display areas of the sample respectively; A perception evaluation value acquisition unit for obtaining the perception evaluation value of the human eye on the display consistency of the first display area and the second display area; wherein, the perception evaluation value corresponds to the actual perception value; An evaluation fitting model construction unit for constructing an evaluation fitting model based on the actual perception values and the perception evaluation values of multiple samples; An evaluation unit for using the evaluation fitting model to evaluate the display consistency of the display panel to be evaluated; The preset brightness of the first display area and the second display area is the same, and the preset chromaticity is the same; then using the instrument to detect the actual perception values of the first display area and the second display area of the sample, including: Using the instrument to respectively obtain the actual measured brightness values of the first display area and the second display area of the sample; Using the instrument to respectively obtain the actual measured chromaticity values of the first display area and the second display area of the sample; The evaluation fitting model includes an evaluation fitting function, the actual perception value is used as the independent variable of the evaluation fitting function, and the perception evaluation value is used as the dependent variable of the evaluation fitting function; The construction of the evaluation fitting function includes: Calculating the brightness difference value between the first display area and the second display area according to the actual measured brightness value of the first display area and the actual measured brightness value of the second display area; Calculating the chromaticity difference value between the first display area and the second display area according to the actual measured chromaticity value of the first display area and the actual measured chromaticity value of the second display area; Fitting the brightness difference value, the chromaticity difference value and the perception evaluation value to obtain the evaluation fitting function; in the evaluation fitting function, the brightness difference value and the chromaticity difference value are independent variables, and the human eye perception evaluation value is the dependent variable.

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