CN114323594A - Display device testing method, processing equipment and testing device - Google Patents
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Abstract
The application provides a test method, a processing device and a test device of a display device. And calculating a brightness change rate according to the plurality of brightness data of the second picture, wherein the brightness change rate is used as a parameter for measuring the flicker degree of the display device. Therefore, when the display picture of the display device is switched back to the second picture in the first picture, the picture switching flicker degree of the display device is measured by utilizing the brightness change rate of the plurality of brightness data of the second picture, so that the picture switching flicker degree of the display device is quantized, and the picture switching flicker degree of the display device is accurately judged.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a method, a processing device, and a testing apparatus for testing a display device.
Background
The Low Temperature Polycrystalline Oxide (LTPO) technology is a technology combining a Low Temperature Polycrystalline Silicon (LTPS) Thin Film Transistor (Thin Film Transistor) and an Indium Gallium Zinc Oxide (IGZO) Thin Film Transistor (Thin Film Transistor), and the Low Temperature Polycrystalline Oxide technology can realize free switching of refresh rates, for example, a refresh rate of 120Hz can be switched during video and games, and a refresh rate of 1Hz to 10Hz can be switched during standby, electronic book, and information screen.
Generally, when the refresh rate is low between 1Hz and 30Hz, when the display device switches different pictures, the picture is cut and the screen is flickered due to unstable brightness, and the flicking refers to the phenomenon that the picture flickers when the picture is cut.
At present, the cutting flicker degree of a display device is mainly judged manually, subjective influence factors of manual judgment are large, judgment standards are not uniform, and the accurate judgment of the flicker degree is influenced because no quantification method is available for the cutting flicker degree of the display device.
Disclosure of Invention
The application provides a test method, processing equipment and a test device of a display device, which are used for accurately judging the flicker degree of the display device with a low refresh rate.
In a first aspect, the present application provides a method for testing a display device, including:
when the display device is switched from a first picture to a second picture, acquiring a plurality of luminance data of the second picture;
and calculating a brightness change rate according to the plurality of brightness data of the second picture, and taking the brightness change rate as a parameter for measuring the image-cutting flicker degree of the display device.
Preferably, the refresh rate of the display device is lower than a preset refresh rate.
Optionally, before the obtaining of the plurality of luminance data of the second picture, the method further includes:
acquiring a plurality of initial brightness data of a second picture;
when the second picture is switched to a first picture, acquiring a plurality of luminance data of the first picture;
preferably, a gray scale difference value between the first picture and the second picture is greater than a preset gray scale value.
Optionally, the calculating a luminance change rate according to the plurality of luminance data of the second picture, and using the luminance change rate as a parameter for measuring a degree of image-cutting flicker of the display device specifically includes:
sequencing the plurality of brightness data of the second picture according to the sequence of acquisition;
respectively calculating a difference value of two adjacent luminance data and a ratio of an absolute value of the difference value to the luminance data acquired in advance in the two adjacent luminance data to obtain a plurality of ratios;
calculating the average value of the ratios, and taking the average value as a parameter for measuring the degree of the map cutting flicker of the display device;
preferably, a preset number of ratios is selected from the plurality of ratios and an average of the preset number of ratios is calculated.
Optionally, the first picture includes a first sub-picture and/or a second sub-picture;
when the display device is switched from a first picture to a second picture, acquiring a plurality of luminance data of the second picture, specifically comprising:
when the display device is switched from a first sub-picture to a second picture, acquiring a plurality of first brightness data of the second picture;
and/or when the display device is switched from a second sub-picture to a second picture, acquiring a plurality of second brightness data of the second picture;
preferably, the gray scale value of the first sub-frame is greater than the gray scale value of the second sub-frame, and the gray scale value of the second sub-frame is less than the gray scale value of the second sub-frame.
Optionally, the calculating a luminance change rate according to the plurality of luminance data of the second picture specifically includes:
sequencing the plurality of first brightness data of the second picture according to the sequence of acquisition;
respectively calculating a first difference value of two adjacent first brightness data and a first ratio of an absolute value of the first difference value to brightness data acquired in advance in the two adjacent first brightness data to obtain a plurality of first ratios;
calculating a first average of the plurality of first ratios;
and/or sequencing a plurality of second brightness data of the second picture according to the sequence of acquisition;
respectively calculating a second difference value of two adjacent second brightness data and a second ratio of the absolute value of the second difference value to the brightness data acquired in advance in the two adjacent second brightness data to obtain a plurality of second ratios;
calculating a second average of the plurality of second ratios;
preferably, a preset number of first ratios are selected from the plurality of first ratios, and a first average value of the preset number of first ratios is calculated;
and/or selecting a preset number of second ratios from the plurality of second ratios, and calculating a second average value of the preset number of second ratios.
Optionally, the using the luminance change rate as a parameter for measuring a degree of flicker of a cut image of a display device specifically includes:
taking the first average value as a parameter for measuring the degree of image cutting flicker of the display device;
or, the second average value is used as a parameter for measuring the degree of image cutting flicker of the display device;
or, adding the first average value and the second average value to obtain a sum value, and using the sum value as a parameter for measuring the cut flicker degree of the display device;
or comparing the first average value with the second average value, if the first average value is larger than the second average value, taking the first average value as a parameter for measuring the image-cutting flicker degree of the display device, and if the second average value is larger than the first average value, taking the second average value as a parameter for measuring the image-cutting flicker degree of the display device.
Optionally, when the display device is switched from a first screen to a second screen, acquiring a plurality of luminance data of the second screen specifically includes:
when the display device is switched from a first picture to a second picture, a plurality of luminance data of the second picture are obtained within preset time according to preset time intervals.
Optionally, before calculating the luminance change rate according to the plurality of luminance data of the second picture, the method further includes:
judging whether the plurality of initial brightness data of the second picture and the plurality of brightness data of the second picture are both in a preset brightness range;
the calculating a luminance change rate according to the plurality of luminance data of the second picture specifically includes:
and when the plurality of initial brightness data of the second picture and the plurality of brightness data of the second picture are both in a preset brightness range, calculating a brightness change rate according to the plurality of brightness data of the second picture.
In a second aspect, the present application provides a processing device comprising: a memory and a processor;
the memory is used for storing instructions; the processor is used for calling the instructions in the memory to execute the test method of the display device in the first aspect and any one of the possible designs of the first aspect.
In a third aspect, the present application provides a test apparatus comprising: a processing device of a second aspect, a stage, the display device on the stage, a colorimeter on the display device, and a lighting machine connected to the display device, the processing device being connected to the colorimeter;
the microscope carrier is used for bearing the display device, the lamp lighter is used for switching the picture of the display device, and the colorimeter is used for acquiring the brightness data of the picture.
According to the test method, when the first picture is switched to the second picture, the brightness data of the second picture are obtained, the brightness change rate is calculated according to the brightness data of the second picture, and the brightness change rate is used as a parameter for measuring the image-cutting flicker degree of the display device. Therefore, when the display picture of the display device is switched back to the second picture from the first picture, the plurality of luminance data of the second picture are obtained, and the picture-cutting flicker degree of the display device is measured by using the luminance change rate of the plurality of luminance data, so that the picture-cutting flicker degree of the display device is quantized, and the picture-cutting flicker degree of the display device is accurately judged.
Drawings
In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a testing method of a display device according to an embodiment of the present application;
fig. 2 is a schematic view of a first screen according to an embodiment of the present application;
fig. 3 is a schematic view of a first screen according to an embodiment of the present application;
fig. 4 is a schematic diagram of a second screen according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a processing apparatus according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a testing apparatus according to an embodiment of the present disclosure.
Detailed Description
To make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below with reference to the drawings in the present application, and it is obvious that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
When the refresh rate is low between 1Hz and 30Hz, the display device has the phenomenon of picture cutting and screen flashing due to unstable brightness when different pictures are switched. Specifically, at a low refresh rate, the picture switching time of the display device is extended, for example, the picture switching time at a 10Hz refresh rate is 100ms, and the response time of human eyes is about 10ms to 40 ms. Therefore, when the refresh rate is low, the picture switching time is longer than the human eye response time, and the screen flashing phenomenon is easy to observe. However, currently, there is no quantification method for the flicker degree of the display device, which affects the accurate determination of the flicker degree.
In view of the above problems, the present application provides a method for testing a display device, where a display screen of the display device with a refresh rate lower than a preset refresh rate obtains a plurality of luminance data of a second screen when switching from a first screen to the second screen. And calculating the brightness change rate of the plurality of brightness data, and measuring the image cutting flicker degree of the display device by using the brightness change rate, thereby realizing the quantification of the image cutting flicker degree of the display device and accurately judging the image cutting flicker degree of the display device.
The technical solution of the present application will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 1 is a flowchart illustrating a testing method of a display device according to an embodiment of the present application. The method of the embodiment may include the steps of:
s101, when the display device is switched from a first picture to a second picture, a plurality of luminance data of the second picture are acquired.
When the display frame of the display device with the refresh rate lower than the preset refresh rate is switched from the first frame to the second frame, a plurality of luminance data of the second frame are obtained. The preset refresh rate may be in a range of 1Hz to 30Hz, for example, may be 30Hz, and the display device may be a display device having a refresh rate lower than 30 Hz.
Because the phenomenon of image cutting and screen flashing is not obvious enough when the difference between the gray scale values of the first picture and the second picture is small, the gray scale difference value of the first picture and the second picture can be selected to be larger than the preset gray scale value so as to clearly display the brightness change of the first picture and the second picture, and the phenomenon of screen flashing is easy to observe. The gray scale value of the first frame may be greater than the gray scale value of the second frame, and the gray scale value of the first frame may also be less than the gray scale value of the second frame. The preset gray scale value range may be 48 to 225, for example, the first picture is a black picture or a white picture, as shown in fig. 2 and 3, fig. 2 is a black picture, the black picture is a black circular area, fig. 3 is a white picture, the white picture is a white circular area, the second picture is a 48-gray scale picture, as shown in fig. 4, so that the difference of the brightness between the first picture and the second picture is more obvious, and the flicker phenomenon is more clearly observed.
For convenience of description, in the embodiments of the present application, a display device having a refresh rate lower than a preset refresh rate is referred to as a low refresh rate display device. The low refresh rate display device may be an LTPO low refresh rate display cell phone, tablet, notebook, or the like.
In some embodiments, the test platform may be constructed to measure a plurality of luminance data of the first image and the second image, the test platform includes a display device, a stage, a colorimeter and a lighting machine, the display device is disposed on the stage, the colorimeter is disposed on the display device, for example, is disposed in a middle position of the display device, one end of the colorimeter is connected to the display device, the other end of the colorimeter is connected to the computer display, and the lighting machine is connected to the display device and is used for controlling image switching of the display device. When the lighting machine controls the picture of the display device to be switched from the first picture to the second picture, the colorimeter continuously acquires a plurality of luminance data of the second picture, and the computer display acquires and displays the luminance data of the second picture acquired by the colorimeter. The display device may be, for example, a low refresh rate display device, and the colorimeter may be, for example, a CA-410 colorimeter, and since the lens diameter of the CA-410 colorimeter is 20mm, the diameter of the first screen may be a circle of 25mm, and as shown in fig. 2 and 3, the diameter of the first screen is larger than the lens diameter to reserve a distance of 5mm for placing a deviation to the CA-410 colorimeter. The lighting machine may be, for example, a PG lighting machine.
In the test platform, before acquiring a plurality of brightness data of a first picture switched to a second picture, a lighting machine is used for controlling a display picture of a low-refresh-rate display device to be the second picture, a colorimeter is used for continuously acquiring a plurality of initial brightness data of the second picture, then the lighting machine is used for controlling the display picture of the low-refresh-rate display device to be switched from the second picture to the first picture, the colorimeter is used for continuously acquiring a plurality of brightness data of the first picture, then the lighting machine is used for controlling the display picture of the low-refresh-rate display device to be switched back to the second picture from the first picture, and the colorimeter is used for continuously acquiring a plurality of brightness data of the second picture. In this way, whether the display screen of the low refresh rate display device is successfully switched back to the second screen can be judged by comparing the plurality of initial brightness data of the second screen with the plurality of brightness data of the second screen. The process of collecting data by the colorimeter is a continuous process, so that a plurality of initial brightness data of the second picture are collected firstly, when the second picture is switched to the first picture, a plurality of brightness data of the first picture are collected by the colorimeter, and then a plurality of brightness data of the second picture are collected when the first picture is switched back to the second picture. Therefore, the computer display can acquire a plurality of initial brightness data of the second picture before acquiring a plurality of brightness data of the second picture, and then acquire a plurality of brightness data of the first picture when the second picture is switched to the first picture.
The first frame may include a first sub-frame and/or a second sub-frame, the first sub-frame has a gray scale value greater than that of the second frame, the first sub-frame is, for example, a black frame, the second sub-frame has a gray scale value less than that of the second frame, and the second sub-frame is, for example, a white frame. The first picture comprises a first sub-picture, and a plurality of first brightness data of the second picture are obtained when the first sub-picture is switched to the second picture; the first picture comprises a second sub-picture, and when the second sub-picture is switched to the second picture, a plurality of second brightness data of the second picture are obtained.
As an implementation manner, when the first picture is switched to the second picture, the plurality of luminance data of the second picture are acquired according to a preset time interval. The colorimeter can continuously acquire the brightness data of the second picture for multiple times within a certain time so as to improve the accuracy of the acquired data. The preset time interval can be 1s-2s, and because the human eyes have persistence of vision which is about 42ms, the interval for collecting the brightness data in one preset time interval is 42ms, so that the transient screen flashing quantification is close to the actual screen flashing effect, and the data analysis amount is reduced. Specifically, the acquisition time of the colorimeter may be set to 37ms, and since the software processing time is about 5ms, the data for acquiring one data is 42ms, and 24 data can be acquired in 1s, then, if the preset time interval is 1s, 24 data can be acquired in one preset time interval, and if the preset time interval is 2s, 48 data can be acquired in one preset time interval. It should be noted that, since the process of acquiring the luminance by the colorimeter is a continuous process, the luminance data acquired at a preset time interval may only include the luminance of the first picture, may only include the luminance of the second picture, and may also include the luminance of the first picture and the luminance of the second picture.
And S102, calculating a brightness change rate according to the plurality of brightness data of the second picture, wherein the brightness change rate is used as a parameter for measuring the image cutting flicker degree of the display device.
And sequencing the plurality of brightness data of the second picture according to the collecting sequence, wherein each brightness data has the collecting sequence because the colorimeter continuously collects the brightness data of the second picture, and sequencing the plurality of brightness data of the second picture according to the collecting sequence after the plurality of brightness data are obtained.
And then, respectively calculating the difference value of two adjacent luminance data and the ratio of the absolute value of the difference value to the luminance data acquired in the two adjacent luminance data to obtain a plurality of ratios. For example, the number of the plurality of luminance data is 100, and after 100 luminance data are sorted according to the collecting sequence, the obtained sorting results are luminance 1, luminance 2, …, luminance 99, and luminance 100, and the number of the adjacent luminance data is 99, such as luminance 1 and luminance 2, luminance 2 and luminance 3, …, luminance 99, and luminance 100. A difference q1 between luminance 1 and luminance 2, differences q2, … between luminance 2 and luminance 3, and a difference q99 between luminance 99 and luminance 100 are calculated. The ratio n1 of the absolute value of the difference q1 to the luminance 1, the ratio n2 of the absolute value of the difference q2 to the luminance 2, … the ratio n99 of the absolute value of the difference q99 to the luminance 99 are calculated.
Subsequently, an average value of the plurality of ratios is calculated as a parameter for measuring the degree of flicker of the display device. Preferably, a preset number of ratios may be selected from the plurality of ratios and an average of the preset number of ratios is calculated. The preset number is 24 or 48, for example, because the time for cutting the splash screen is usually 1s-2s, the brightness data obtained in 1s can be 24, and the brightness data obtained in 2s can be 48, the transient splash screen quantification can be closer to the actual effect, and the data analysis amount is reduced.
For example, the ratio n1 to the ratio n24 are selected from 99 ratios, the average value of the ratio n1 to the ratio n24 is calculated, and the average value is used as a parameter for measuring the degree of flicker of the cut image of the display device. The flicker degree of the low-refresh-rate display device is measured by using the brightness change rate, and the flicker degree of the low-refresh-rate display device is larger when the brightness change rate is larger.
When the first picture comprises a first sub-picture or a second sub-picture, first brightness data of the second picture when the first sub-picture is switched to the second picture is acquired, or second brightness data of the second picture when the second sub-picture is switched to the second picture is acquired.
In some embodiments, the first frame includes a first sub-frame, the gray scale value of the first sub-frame is greater than the gray scale value of a second frame, the first sub-frame is a black frame, for example, and the second frame is a 48-gray frame, for example. When the first sub-picture is switched to the second picture, the plurality of first luminance data of the second picture are acquired, the plurality of first luminance data of the second picture are sequenced according to the collecting sequence, first difference values of two adjacent first luminance data are respectively calculated, for example, the two adjacent first luminance data are luminance 1 and luminance 2, the luminance 1 can be subtracted by the luminance 2, and the luminance 1 can also be subtracted by the luminance 2 to obtain the difference value of the luminance 1 and the luminance 2. And then, calculating a first ratio of the absolute value of the first difference value to first brightness data acquired in advance in two adjacent first brightness data to obtain a plurality of first ratios, calculating a first average value of the plurality of first ratios, and taking the first average value as a parameter for measuring the image cutting flicker degree of the display device. Preferably, a preset number of first ratios are selected from the plurality of first ratios, and a first average of the preset number of first ratios is calculated.
In other embodiments, the first frame includes a second sub-frame, the gray scale value of the second sub-frame is smaller than that of the second frame, the second sub-frame is, for example, a white frame, and the second frame is, for example, a 48-gray frame. When the second sub-picture is switched to the second picture, a plurality of second brightness data of the second picture are obtained, the plurality of second brightness data of the second picture are sequenced according to the collecting sequence, second difference values of two adjacent second brightness data are respectively calculated, then, the ratio of the absolute value of the second difference value to the second brightness data collected firstly in the two adjacent second brightness data is calculated so as to obtain a plurality of second ratio values, a second average value of the plurality of second ratio values is calculated, and the second average value is used as a parameter for measuring the map cutting flicker degree of the display device. Preferably, a preset number of second ratios are selected from the plurality of second ratios, and a second average of the preset number of second ratios is calculated.
In still other embodiments, the first frame includes a first sub-frame and a second sub-frame, the first sub-frame has a gray scale value greater than that of the second frame, and the second sub-frame has a gray scale value less than that of the second frame. When the first sub-picture is switched to the second picture, a plurality of first brightness data of the second picture are obtained, and when the second sub-picture is switched to the second picture, a plurality of second brightness data of the second picture are obtained. And sequencing the plurality of first brightness data of the second picture according to the acquisition sequence, and respectively calculating a first difference value of two adjacent first brightness data and a first ratio of the absolute value of the first difference value to the first brightness data acquired in advance in the two adjacent first brightness data so as to obtain a plurality of first ratios. Then, a preset number of first ratios are selected from the plurality of first ratios, and a first average value of the preset number of first ratios is calculated. And sequencing the plurality of second brightness data of the second picture according to the acquisition sequence, and respectively calculating a second difference value of two adjacent second brightness data and a ratio of the absolute value of the second difference value to the first acquired second brightness data of the two adjacent second brightness data to obtain a plurality of second ratio values. Then, a preset number of second ratios are selected from the plurality of second ratios, and a second average value of the preset number of second ratios is calculated.
The first average value and the second average value can be added to obtain a sum value, and the sum value is used as a parameter for measuring the degree of image cutting flicker of the display device. Or comparing the first average value with the second average value, when the first average value is greater than the second average value, taking the first average value as a parameter for measuring the image-cut flicker degree of the display device, and when the second average value is greater than the first average value, taking the second average value as a parameter for measuring the image-cut flicker degree of the display device. In this embodiment, the first average value and the second average value are simultaneously used as parameters for measuring the flicker degree of the display device, so that errors possibly existing in a certain picture are reduced, the accuracy of data is improved, and the cut flicker degree of the display device is accurately measured.
As an implementation manner, whether the plurality of initial luminance data of the second picture and the plurality of luminance data of the second picture are both within the preset luminance range is judged, if both are within the preset luminance range, it is indicated that the display picture of the display device is successfully switched back to the second picture, and then the luminance change rate can be calculated according to the plurality of luminance data of the second picture.
According to the testing method of the display device, when the display picture of the display device is switched back to the second picture from the first picture, the plurality of luminance data of the second picture are obtained, the luminance change rate is calculated according to the plurality of luminance data of the second picture, and the picture-cutting flicker degree of the display device is measured by utilizing the luminance change rate, so that the picture-cutting flicker degree of the display device is quantized, and the picture-cutting flicker degree of the display device is accurately judged.
Fig. 5 shows a schematic structural diagram of a processing device provided in an embodiment of the present application. As shown in fig. 5, the processing device 20 of the present embodiment may include: memory 21, processor 22 and communication interface 23.
A memory 21 for storing computer instructions. The Memory 21 may include a Random Access Memory (RAM), a Non-Volatile Memory (NVM), at least one disk Memory, a usb disk, a removable hard disk, a read-only Memory, a magnetic disk or an optical disk.
A processor 22 for executing the computer instructions stored by the memory to implement the testing method in the above-described embodiments. Reference may be made in particular to the description relating to the method embodiments described above. The Processor 22 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
A communication interface 23, which may be coupled to the processor 22. The processor 22 may control the communication interface 23 to implement the functions of receiving and transmitting data.
The processing device provided in this embodiment may be used to execute the above method for testing a display device, and the implementation manner and the technical effect are similar, and this embodiment is not described herein again.
Fig. 6 shows a schematic structural diagram of a testing apparatus provided in an embodiment of the present application. As shown in fig. 6, the test apparatus of the present embodiment includes: the processing device 20, the stage 50, the display device 40 positioned on the stage 50, the colorimeter 30 positioned on the display device 40, and the lighting machine 60 connected to the display device 40, which are described above, the processing device 20 being connected to the colorimeter 30;
the stage 50 is used for carrying the display device 40, the lighting machine 60 is used for switching the picture of the display device, and the colorimeter 30 is used for acquiring the brightness data of the picture.
In this embodiment, the display device 40 with a refresh rate lower than the preset refresh rate is referred to as a low-refresh-rate display device 40, the low-refresh-rate display device 40 is placed on the stage 50, and the colorimeter 30 is placed on the low-refresh-rate display device 40, so that the colorimeter 30 can acquire luminance data of a picture of the low-refresh-rate display device 40, the colorimeter 30 is further connected with the processing device 20, and the lighting device 60 is connected with the low-refresh-rate display device 40 and is used for controlling picture switching of the low-refresh-rate display device 40. For example, the screen of the low refresh rate display device 40 is controlled to switch from the second screen to the first screen and from the first screen back to the second screen. The colorimeter 30 is configured to measure luminance data of a picture, for example, when the lighting machine 60 controls the picture of the low refresh rate display device 40 to be switched from the second picture to the first picture, the colorimeter 30 measures luminance data of the first picture, and when the lighting machine 60 controls the picture of the low refresh rate display device 40 to be switched from the first picture to the second picture, the colorimeter 30 measures luminance data of the second picture. The colorimeter may be, for example, a CA-410 colorimeter, and the lighting machine may be, for example, a PG lighting machine. The processing device 20 is configured to obtain the plurality of luminance data of the first picture and the plurality of luminance data of the second picture measured by the colorimeter 30, and calculate a luminance change rate from the plurality of luminance data of the second picture, using the luminance change rate as a parameter for measuring the degree of cut flicker of the low refresh rate display device.
The application provides a testing arrangement, the picture of display device is switched to the lighting machine, and the luminance data of switching the picture is gathered to the colorimeter, and processing apparatus calculates the luminance rate of change of picture according to luminance data, weighs display device's scintillation degree through the luminance rate of change to realize display device's the quantization of cutting the picture scintillation degree, accurate judgement display device's cutting the picture scintillation degree.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: it is also possible to modify the solutions described in the previous embodiments or to substitute some or all of them with equivalents. And the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A method of testing a display device, the method comprising:
when the display device is switched from a first picture to a second picture, acquiring a plurality of luminance data of the second picture;
and calculating a brightness change rate according to the plurality of brightness data of the second picture, and taking the brightness change rate as a parameter for measuring the image-cutting flicker degree of the display device.
2. The method of claim 1, wherein before the obtaining the plurality of luminance data for the second picture, the method further comprises:
acquiring a plurality of initial brightness data of a second picture;
when the second picture is switched to a first picture, acquiring a plurality of luminance data of the first picture;
preferably, a gray scale difference value between the first picture and the second picture is greater than a preset gray scale value.
3. The method according to claim 1, wherein the calculating a luminance change rate according to the plurality of luminance data of the second frame, and using the luminance change rate as a parameter for measuring a degree of flicker of the display device in a cut view, specifically comprises:
sequencing the plurality of brightness data of the second picture according to the sequence of acquisition;
respectively calculating a difference value of two adjacent luminance data and a ratio of an absolute value of the difference value to the luminance data acquired in the adjacent luminance data to obtain a plurality of ratios;
calculating the average value of the ratios, and taking the average value as a parameter for measuring the degree of the map cutting flicker of the display device;
preferably, a preset number of ratios is selected from the plurality of ratios and an average of the preset number of ratios is calculated.
4. The method of claim 1, wherein the first picture comprises a first sub-picture and/or a second sub-picture;
when the display device is switched from a first picture to a second picture, acquiring a plurality of luminance data of the second picture, specifically comprising:
when the display device is switched from a first sub-picture to a second picture, acquiring a plurality of first brightness data of the second picture;
and/or when the display device is switched from a second sub-picture to a second picture, acquiring a plurality of second brightness data of the second picture;
preferably, the gray scale value of the first sub-frame is greater than the gray scale value of the second sub-frame, and the gray scale value of the second sub-frame is less than the gray scale value of the second sub-frame.
5. The method according to claim 4, wherein the calculating a luminance change rate from the plurality of luminance data of the second picture specifically comprises:
sequencing the plurality of first brightness data of the second picture according to the sequence of acquisition;
respectively calculating a first difference value of two adjacent first brightness data and a first ratio of an absolute value of the first difference value to first brightness data acquired in advance in the two adjacent first brightness data to obtain a plurality of first ratios;
calculating a first average of the plurality of first ratios;
and/or sequencing a plurality of second brightness data of the second picture according to the sequence of acquisition;
respectively calculating a second difference value of two adjacent second brightness data and a second ratio of an absolute value of the second difference value to second brightness data acquired in advance in the two adjacent second brightness data to obtain a plurality of second ratios;
calculating a second average of the plurality of second ratios;
preferably, a preset number of first ratios are selected from the plurality of first ratios, and a first average value of the preset number of first ratios is calculated;
and/or selecting a preset number of second ratios from the plurality of second ratios, and calculating a second average value of the preset number of second ratios.
6. The method according to claim 5, wherein the using the luminance change rate as a parameter for measuring a degree of flicker of a cut image of a display device specifically comprises:
taking the first average value as a parameter for measuring the degree of image cutting flicker of the display device;
or, the second average value is used as a parameter for measuring the degree of image cutting flicker of the display device;
or, adding the first average value and the second average value to obtain a sum value, and using the sum value as a parameter for measuring the cut flicker degree of the display device;
or comparing the first average value with the second average value, if the first average value is larger than the second average value, taking the first average value as a parameter for measuring the image-cutting flicker degree of the display device, and if the second average value is larger than the first average value, taking the second average value as a parameter for measuring the image-cutting flicker degree of the display device.
7. The method according to claim 1, wherein acquiring a plurality of luminance data of a second image when the display device switches from a first image to the second image comprises:
when the display device is switched from a first picture to a second picture, a plurality of luminance data of the second picture are obtained according to a preset time interval.
8. The method of claim 2, wherein before calculating a rate of change of luminance from the plurality of luminance data for the second picture, the method further comprises:
judging whether the plurality of initial brightness data of the second picture and the plurality of brightness data of the second picture are both in a preset brightness range;
the calculating a luminance change rate according to the plurality of luminance data of the second picture specifically includes:
and when the plurality of initial brightness data of the second picture and the plurality of brightness data of the second picture are both in a preset brightness range, calculating a brightness change rate according to the plurality of brightness data of the second picture.
9. A processing device, comprising: a processor, and a memory communicatively coupled to the processor;
the memory stores computer-executable instructions;
the processor executes computer-executable instructions stored by the memory to implement a method of testing a display device according to any one of claims 1 to 8.
10. A test apparatus, comprising: the processing device of claim 9, a stage, the display device on the stage, a colorimeter on the display device, and a light engine coupled to the display device, the processing device coupled to the colorimeter;
the microscope carrier is used for bearing the display device, the lamp lighter is used for switching the picture of the display device, and the colorimeter is used for acquiring the brightness data of the picture.
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