CN113178156A - Method for testing picture switching and frame rate matching degree of display screen - Google Patents
Method for testing picture switching and frame rate matching degree of display screen Download PDFInfo
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- CN113178156A CN113178156A CN202010738717.1A CN202010738717A CN113178156A CN 113178156 A CN113178156 A CN 113178156A CN 202010738717 A CN202010738717 A CN 202010738717A CN 113178156 A CN113178156 A CN 113178156A
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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Abstract
The invention relates to the technical field of testing, in particular to a method for testing the picture switching and frame rate matching degree of a display screen, which comprises the following steps: step S1: the display screen outputs frames with M gray value and N gray value frame by frame; step S2: testing and recording the brightness of the picture frame by frame; step S3: taking two adjacent groups of brightness data LvG1And LvG2And calculating a jitter value ABS (Lv) of the luminance of the pictureG1‑LvG2)/((LvG1+LvG2) 2)/2); step S4: and determining the matching degree of the frame rate and the picture switching of the display screen according to the jitter value. The method for testing the picture switching and frame rate matching degree of the display screen can better test the picture switching and frame rate matching degree of the display, so as to be beneficial to promoting the reputation of enterprises and increasing the experience of users.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of testing, in particular to a method for testing the picture switching and frame rate matching degree of a display screen.
[ background of the invention ]
In order to better satisfy the viewing requirements of people on the display, people increase the frame rate of the display to refresh more pictures in the same time, so as to improve the smoothness of the pictures.
However, as the frame rate is increased and the frame switching speed of the display screen is not increased, the frame cannot reach the expected brightness, and the brightness difference is increased with the increase of the frame rate, so that the user experience cannot be well satisfied even with the display screen with the higher frame rate. Therefore, in order to make the user obtain a better experience, it is necessary to test the matching degree between the frame rate and the screen switching of the display.
[ summary of the invention ]
In order to overcome the technical problems, the invention provides a method for testing the picture switching and frame rate matching degree of a display screen.
The technical scheme for solving the technical problem is to provide a method for testing the picture switching and frame rate matching degree of a display screen, which comprises the following steps:
step S1: the display screen outputs frames with M gray value and N gray value frame by frame;
step S2: testing and recording the brightness of the picture frame by frame;
step S3: taking two adjacent groups of brightness data LvG1And LvG2And calculating a jitter value ABS (Lv) of the luminance of the pictureG1-LvG2)/((LvG1+LvG2))/2)；
Step S4: and determining the matching degree of the frame rate and the picture switching of the display screen according to the jitter value.
Preferably, the value of M is 0 or 73, and the value of N is 182 or 255.
Preferably, the step S2 further includes the steps of:
step S21: the luminance of the picture is tested at a picture refresh rate of 60HZ or a picture refresh rate of 120 HZ.
Preferably, the step S1 further includes the steps of:
in step S11, the frames with M gray value and N gray value are alternately output.
Preferably, the value of M is 36 or 109, and the value of N is 146 or 219.
Compared with the prior art, the method for testing the frame rate matching degree and the picture switching of the display screen has the following advantages:
the jitter value (the ratio of the brightness difference value to the average value) of the pictures of two adjacent frames is tested, so that the brightness change degree of the pictures during the switching of the two frames can be obtained, workers can be helped to learn the brightness change performance of the display screen during the switching of the pictures, and the display screen with a larger jitter value means that the brightness during the switching of the pictures can achieve the expected effect more quickly at the same time under the same frame rate, so that the pictures can be switched to the next picture more quickly, the display performance of the display with the same frame rate can be compared, enterprises can select better products to be put into the market, the reputation of the enterprises can be increased, and users can obtain display products with better display performance.
[ description of the drawings ]
Fig. 1 is a schematic flowchart of a method for testing frame rate matching and screen switching according to the present invention.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present invention provides a method for testing frame rate matching and screen switching, including the following steps:
step S1: the display screen outputs frames with M gray value and N gray value frame by frame.
That is, the display screen controls the gray value of the picture of one frame to be M, controls the gray value of the picture of the next frame to be N, and controls the gray value of the picture of the next frame to be M.
Preferably, step S1 further includes the steps of:
in step S11, the frames with M gray value and N gray value are alternately output.
The image with the gray value M corresponds to one frame of image, the image with the gray value N corresponds to one frame of image, and the display screen alternately outputs the image with the gray value M and the image with the gray value N frame by frame.
Step S2: the brightness of the picture is tested and recorded frame by frame.
And testing and recording the brightness of the picture output by each frame of the display screen.
It can be understood that if the response speed of the display screen is faster, the brightness value of the picture when the display screen is switched to the gray value M or the gray value N will be closer to the brightness value when the gray value M or the gray value N in practice, and there is a smaller difference; if the response speed of the display screen is slow, the luminance value of the picture when the display screen is switched to the gray scale value M cannot approach the luminance value when the gray scale value M in practice due to the slow response speed of the display screen, that is, the slow switching speed of the picture, the actual luminance value is between the luminance value when the display screen is initially switched and the luminance value when the gray scale value M, and has a larger difference with the luminance value when the gray scale value M, and similarly, if the response speed of the display screen is slow, the luminance value of the picture when the display screen is switched to the gray scale value N cannot approach the luminance value when the gray scale value M in practice due to the slow response speed of the display screen, the actual luminance value is between the luminance value when the display screen is initially switched and the luminance value when the gray scale value N, and has a larger difference with the luminance value when the gray scale value N.
Preferably, the step S2 further includes the steps of:
step S21: the luminance of the picture is tested at a picture refresh rate of 60HZ or a picture refresh rate of 120 HZ.
Preferably, the gray-level value M is 0, 36, 73 or 109, and the gray-level value N is 146, 182, 219 or 255, including but not limited thereto, as long as the requirement that the display screen alternately outputs pictures with two different gray-level values frame by frame is satisfied.
Step S3: taking two adjacent groups of brightness data LvG1And LvG2And calculating a jitter value ABS (Lv) of the luminance of the pictureG1-LvG2)/((LvG1+LvG2))/2)。
It can be understood that the jitter value of the image brightness in the present invention is a percentage of a difference value between a brightness value when the actually measured gray-scale value is M and a brightness value when the actually measured gray-scale value is N and an average value, and an absolute value is taken.
Step S4: and determining the matching degree of the frame rate and the picture switching of the display screen according to the jitter value.
According to the formula in step S3, combining the switching characteristics of the display screen when the gray scale value is M and the gray scale value is N, when the response speed of the display screen is faster, the jitter value is higher, that is, the requirement of the refresh frame rate of the display screen is met, that is, the matching degree is better. The working personnel can determine the response speed of different display screens according to the jitter value under the condition that the refreshing frequency of the display screens and the selected two gray values are kept the same, and can distinguish the display performances of different display screens to a certain extent, wherein the performance of the display screen with a larger jitter value is better than that of the display screen with a smaller jitter value; the worker can select a product with better display performance of the display screen under the condition that the two gray values are kept to be the same (namely, one gray value is M, and the other gray value is N), determine the jitter value of the product and determine the jitter value as a standard reference value, and carry out inspection, maintenance or scrapping treatment on the same product with the jitter value lower than the standard reference value so as to improve the overall quality of the product, facilitate the expansion of the sales and market share occupation rate of the product of an enterprise, and also facilitate the increase of the experience of a consumer and the possibility of secondary purchase of the consumer or recommendation of others.
It can be understood that the selection of the product with better display performance of the display screen can be selected according to the actual observation effect of the worker or the precision of the product during assembly, including but not limited to this, and the selection can also be performed by other selection modes of the product with better display performance of the display screen.
Compared with the prior art, the method for testing the frame rate matching degree and the picture switching of the display screen has the following advantages:
the jitter value (the ratio of the brightness difference value to the average value) of the pictures of two adjacent frames is tested, so that the brightness change degree of the pictures during the switching of the two frames can be obtained, workers can be helped to learn the brightness change performance of the display screen during the switching of the pictures, and the display screen with a larger jitter value means that the brightness during the switching of the pictures can achieve the expected effect more quickly at the same time under the same frame rate, so that the pictures can be switched to the next picture more quickly, the display performance of the display with the same frame rate can be compared, enterprises can select better products to be put into the market, the reputation of the enterprises can be increased, and users can obtain display products with better display performance.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit of the present invention should be included in the scope of the present invention.
Claims (5)
1. A method for testing the matching degree of the picture switching and the frame rate of a display screen is characterized in that: the method for testing the matching degree of the frame rate and the picture switching of the display screen comprises the following steps:
step S1: the display screen outputs frames with M gray value and N gray value frame by frame;
step S2: testing and recording the brightness of the picture frame by frame;
step S3: taking two adjacent groups of brightness data LvG1And LvG2And calculating a jitter value ABS (Lv) of the luminance of the pictureG1-LvG2)/((LvG1+LvG2))/2)；
Step S4: and determining the matching degree of the frame rate and the picture switching of the display screen according to the jitter value.
2. The method for testing the frame rate matching degree of the display screen image switching as claimed in claim 1, wherein: the value of M is 0 or 73, and the value of N is 182 or 255.
3. The method for testing the frame rate matching degree of the display screen image switching as claimed in claim 1, wherein: the step S2 further includes the steps of:
step S21: the luminance of the picture is tested at a picture refresh rate of 60HZ or a picture refresh rate of 120 HZ.
4. The method for testing the frame rate matching degree of the display screen image switching as claimed in claim 1, wherein: the step S1 further includes the steps of:
in step S11, the frames with M gray value and N gray value are alternately output.
5. The method for testing the frame rate matching degree of the display screen image switching as claimed in claim 1, wherein: the value of M is 36 or 109, and the value of N is 146 or 219.
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| CN202010738717.1A CN113178156A (en) | 2020-07-28 | 2020-07-28 | Method for testing picture switching and frame rate matching degree of display screen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114241958A (en) * | 2021-11-02 | 2022-03-25 | 惠科股份有限公司 | Display panel testing method, driving method and display device |
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