CN107221276B - Method and device for detecting afterimage of display device - Google Patents

Abstract

The embodiment of the invention provides a method and a device for detecting an afterimage of a display device, relates to the technical field of display, and solves the problems of low accuracy and efficiency in judging the afterimage degree of the display device according to human eyes in the prior art. The scheme comprises the following steps: after the display device adopts the black-white checkerboard picture to light up for a period of time, the black-white checkerboard picture is switched into a gray-scale picture; acquiring the brightness value of each time display device corresponding to each checkerboard position in the black and white checkerboard picture at M times after the grey scale picture is switched, wherein M is more than or equal to 1; determining the residual image degree of the black and white checkerboard picture at each moment according to the brightness value of each checkerboard position acquired at each moment; and outputting the corresponding relation between the afterimage degree of the black and white checkerboard picture and N moments, wherein M is more than or equal to N and more than or equal to 1. The invention is applied to the display device.

Description

Method and device for detecting residual image of display device

technical field

The present invention relates to the field of display technology, and in particular, to a method and device for detecting afterimages of a display device.

Background technique

Displays, such as OLED (English full name: Organic Light-Emitting Diode, Chinese definition: Organic Light Emitting Diode) display, because of its self-luminous, flexible and bendable, low power consumption, high image quality, bright colors, high resolution and other characteristics, It is increasingly used in the field of high-performance displays.

In order to improve the performance and quality of the display, in the production process, it is necessary to detect and judge the performance indicators such as the afterimage level, resolution, brightness, contrast and color gamut of the display. The afterimage refers to the phenomenon that after the monitor displays the same picture for a long time and then switches to another picture, the monitor will leave the afterimage of the previous picture on the new picture. Specifically, for example, in an OLED display, due to the hysteresis effect of the thin film transistor (TFT) in the OLED display, and/or after the OLED display is used for a long time, the electroluminescent material is aged, so that the luminous efficiency of the electroluminescent material decreases, thereby reducing the luminous efficiency of the electroluminescent material. Causes an afterimage of the OLED display.

In the prior art, the display is usually lit by a black-and-white checkerboard screen for a period of time, and then the black-and-white checkerboard screen is switched to a grayscale screen (that is, a screen with the same pixels, usually the screen is somewhere between black and white images. A picture with shades of color), by recording the time from the switching of the picture to the disappearance of the black and white checkerboard picture observed by the human eye, the judgment of the degree of afterimage of the display is realized.

However, the above-mentioned human eye judgment method is highly subjective and has low accuracy, so that technicians cannot make comprehensive and targeted improvements to the display for defects caused by afterimages, which greatly reduces product quality and yield. . In addition, because the black and white checkerboard picture disappears for a long time, the human eye needs to observe whether the black and white checkerboard picture disappears in real time, which leads to the problem of low efficiency of the above-mentioned human eye determination method.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a method and a device for detecting afterimage of a display device, so as to solve the problem of low accuracy and efficiency in determining the degree of display afterimage according to human eyes in the prior art.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

In a first aspect, a method for detecting afterimages of a display device is provided, including:

After the display device uses the black and white checkerboard picture to light up for a period of time, the black and white checkerboard picture is switched to a grayscale picture;

At M times after switching to the gray-scale picture, obtain the luminance value of the display device corresponding to each checkerboard position in the black-and-white checkerboard picture, where M≥1;

Determine the degree of afterimage of the black and white checkerboard image at the time according to the luminance value at the position of each checkerboard obtained at the time;

The correspondence between the degree of afterimage of the black and white checkerboard picture and the N time instants is output, where M≧N≧1.

In a second aspect, a device for detecting afterimage of a display device is provided, comprising:

a control module, configured to control the display device to switch the black and white checkerboard picture to a grayscale picture after the display device uses the black and white checkerboard picture to light up for a period of time;

The acquisition module is configured to acquire, at M times after the control module controls the display device to switch the black-and-white checkerboard picture to the gray-scale picture, the display device corresponding to each of the black-and-white checkerboard pictures. The luminance values at checkerboard positions, where M≥1;

a storage module, configured to store the brightness value at each checkerboard position in the black and white checkerboard picture corresponding to the display device obtained by the obtaining module at the time;

A processing module, configured to determine the degree of afterimage of the black and white checkerboard picture at the time according to the brightness value at each checkerboard position in the black and white checkerboard picture stored in the storage module;

An output module, configured to output the correspondence between the degree of afterimage of the black and white checkerboard screen determined by the processing module and the N time instants set by the control module, where M≥N≥1.

In the solution provided by the present application, after the black-and-white checkerboard picture is turned on for a period of time and then switched to the gray-scale picture at M times, the brightness value of the display device corresponding to each checkerboard position in the black-and-white checkerboard picture is obtained, and according to The obtained brightness value determines the degree of afterimage of the black and white checkerboard picture at each moment; the corresponding relationship between N moments and the afterimage degree of the black and white checkerboard picture is finally output. Compared with the prior art, the degree of afterimage of the display device can be determined objectively and quantifiably, and it is not necessary to observe whether the black and white checkerboard picture disappears for a long time. Therefore, the solution provided by the present application can solve the problem that the accuracy and efficiency of determining the level of afterimage of the display according to the human eye are low in the prior art.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic diagram of a method for detecting an afterimage of a display device according to an embodiment of the present invention;

2 is a schematic diagram of alignment of an optical fiber probe of an optical detection device with a black and white checkerboard screen according to an embodiment of the present invention;

3 is a schematic structural diagram of an optical detection device CA310 provided by the prior art;

4 is a schematic structural diagram of a device for detecting afterimage of a display device provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a system for detecting afterimages of a display device according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the application of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the application of the present invention. Obviously, the described embodiments are only a part of the embodiments of the application of the present invention, rather than all the implementations. example. Based on the embodiments in the application of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the application of the present invention.

It should be noted that, in the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations, or illustrations. Any embodiments or designs described in the embodiments of the present application as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner.

It should be noted that, in the embodiments of the present application, unless otherwise specified, the meaning of "plurality" refers to two or more. For example, multiple packets refers to two or more packets.

It should be noted that, in the embodiments of the present application, "of", "corresponding (English: corresponding, relevant)" and "corresponding (English: corresponding)" can sometimes be mixed. It should be noted that, When not emphasizing their differences, their intended meanings are the same.

Based on the above content, an embodiment of the present invention provides a method for detecting afterimage of a display device. The execution body of the method may be a device for detecting afterimage of a display device. As shown in FIG. 1 , the method includes the following steps:

101. After the display device uses the black-and-white checkerboard picture to light up for a period of time, switch the black-and-white checkerboard picture to a grayscale picture.

Exemplarily, the above-mentioned display device is a device with a display function, specifically, a display screen (display panel), or a product including a display screen. For example, the display device can be any product or component with a display function, such as a monitor, a television, a digital camera, a mobile phone, a tablet computer, and the like. The display device may be a liquid crystal display device, or an LED (eg, OLED, AMOLED, etc.) display device or the like.

The above-mentioned black and white checkerboard picture can be adjusted according to the ratio of the display screen, and an example can be an 8*8 checkerboard. Generally speaking, each black and white checkerboard is a rectangle. For an 8*8 checkerboard, the number of pixel rows and pixel columns of the display screen can be equally divided into 8 parts to obtain the corresponding checkerboard.

The above-mentioned grayscale picture refers to that all the pixels in the picture are the same. Usually, the picture is a picture with a certain shade level between black and white images, that is, the brightness is in the brightest picture (white picture) and the brightness is in the darkest picture ( a picture between black pictures). If the pixel components are represented by the RGB color mode, the grayscale picture can be a picture in which all pixels are equal, and the RGB components in each pixel are also equal. In the afterimage detection performed by the display device, those skilled in the art generally use a picture of R=G=B=127 (gray scale) for each pixel in a grayscale picture.

In addition, the above-mentioned black and white checkerboard picture lighting time is generally about an hour, and of course it can be longer.

Exemplarily, the device for detecting afterimages of the display device may send a screen switching message to the display device (for example, the message may include data of grayscale images, or may be a switching instruction, and the switching instruction may read grayscale images from a storage module of the display device. data of the grayscale picture, and control the display device to display the grayscale picture), so that the display device switches the black and white checkerboard picture to the grayscale picture. Further, the display device to display the black and white checkerboard picture can also be controlled by the detection device. Specifically, the detection device of the afterimage of the display device can send an initial picture display message to the display device (for example: the message can include the data of the initial picture, or it can be is a display command, the display command can read the data of the initial picture from the storage module of the display device), so that the display device displays a black and white checkerboard picture.

102. At M times after switching to the grayscale picture, acquire the luminance value of the display device corresponding to each checkerboard position in the black-and-white checkerboard picture, where M≥1.

Optionally, the solution provided by the present application collects and displays the brightness value corresponding to each checkerboard position in the black-and-white checkerboard picture through multiple fiber probes of the improved optical detection device. In order to accurately capture the brightness value of the display device corresponding to each checkerboard position in the black-and-white checkerboard picture, it is better to use the optical detection device during the lighting process of the black-and-white checkerboard picture (that is, before the picture is switched to a grayscale picture). The optical fiber probe is aligned with each checkerboard in the black and white checkerboard screen to ensure that the required brightness value can be collected in time after the screen is switched. As shown in Figure 2, each checkerboard corresponds to a fiber probe.

Based on this, step 102 specifically includes: at M moments after switching to the grayscale picture, acquiring the brightness value of the display device corresponding to each checkerboard position in the black-and-white checkerboard picture through the fiber probe of the optical detection device.

An exemplary, unmodified optical inspection device is generally a CA310. According to the schematic structural diagram of the existing optical inspection equipment CA310 shown in FIG. 3 , it can be known that the optical probe of the existing CA310 has a larger diameter, and one probe can cover multiple black and white checkerboards. Therefore, the use of the existing CA310 cannot accurately collect the brightness value of the display device corresponding to each checkerboard position in the black and white checkerboard picture. Based on this, the solution provided in this application improves the existing optical inspection equipment CA310, and uses a fiber optic probe as an optical probe to replace its existing large-diameter optical probe.

For example, step 102 may be that after the display device is switched to a grayscale image, the device for detecting afterimages of the display device acquires the brightness value in real time. Specifically, after controlling the display device to switch to a gray-scale screen, the detection device may periodically send acquisition instructions to the optical detection device at preset time intervals, so that the optical detection device can collect every acquisition instruction when receiving the acquisition instruction. The brightness value at the position of each black and white checkerboard is uploaded to the detection device; the detection device can also send a real-time acquisition command to the optical detection device when the control display device is switched to a grayscale screen, so that the optical detection device can collect each The brightness value at the position of the black and white checkerboard is uploaded to the detection device until the detection device sends a stop acquisition instruction to the optical detection device.

As another example, step 102 can also be based on one or more preset collection times. For example, if it is necessary to perform afterimage detection 10 ms after switching to a grayscale image, the detection device controls the display device to switch to a grayscale image after the detection device switches to the grayscale image. At the moment of 10ms, the acquisition command is sent to the optical detection device; or, if the afterimage detection needs to be performed at the moments of 5ms, 10ms and 13ms after switching to the grayscale screen, the detection device controls the display device to switch to the grayscale screen 5ms, At the moment of 10ms and 13ms, the acquisition command is sent to the optical detection device.

103. Determine the degree of afterimages of the black and white checkerboard images at the M times according to the luminance values at each checkerboard position collected at the M times.

Exemplarily, the degree of afterimage of the black and white checkerboard picture refers to the residual degree of the black and white checkerboard picture on the grayscale picture after the black and white checkerboard picture is switched to a grayscale picture. Exemplarily, the degree of afterimage of the black and white checkerboard is represented by the afterimage level, and may also be other parameters representing the degree of afterimage, such as the average value of all luminance values obtained at each black and white checkerboard position at a moment.

Optionally, the method for determining the degree of afterimage for the black and white checkerboard images obtained at each moment is as follows:

1031. According to the luminance value at each checkerboard position obtained at a moment, calculate the difference between the luminance values at every two adjacent checkerboard positions in each row of checkerboards, and/or, calculate each row of checkerboards. In a column checkerboard, the difference between the luminance values at every two adjacent checkerboard positions in the same column.

Illustratively, taking an m*m black and white checkerboard picture as an example, each checkerboard in the black and white checkerboard picture is represented by A _i,j . When calculating the difference δ _ij of luminance values at the positions of two adjacent checkerboards in the same row in each row of the black and white checkerboard screen, it can be calculated by _δij =A _i,j+1 -A _i,j , where i is a natural number between [1, m] and j is a natural number between [1, m-1]. Correspondingly, when calculating the difference η _ij of the luminance values at the positions of two adjacent chessboards located in the same column in each column of the black and white checkerboard screen, it can be calculated by η _ij =A _{i+1, j} −A _{i, j} is calculated, where i is a natural number between [1, m-1] and j is a natural number between [1, m]. For the embodiment of the present invention, all δ _ij can be calculated to obtain the afterimage level; all η _ij can also be calculated to obtain the afterimage level; and all δ _ij and all η _ij can be calculated together to obtain the afterimage level.

1032. Obtain the afterimage level of the black-and-white checkerboard picture at the moment according to all the differences corresponding to a moment calculated in step 1031.

Exemplarily, the afterimage level of the black and white checkerboard picture and the difference between the luminance values at two adjacent checkerboard positions have the following correspondence in Table 1:

Afterimage level The difference value L of the luminance value LV1 0≤L＜L1 LV2 L1≤L＜L2 LV3 L2≤L＜L3 LV4 L3≤L＜L4 LV5 L4≤L

Table 1

Wherein, the above-mentioned L represents the difference between the luminance values at two adjacent checkerboard positions; the above-mentioned L1 to LV5 represent the boundary values of each afterimage level. It should be noted that the content in the above table is only an example, and is not limited here. The higher the afterimage level is, the more serious the afterimage phenomenon of the display device is.

Optionally, based on the above content, step 1032 can be implemented in the following manner:

Manner 1: Obtain the afterimage level corresponding to the maximum value among all the differences as the afterimage level of the black and white checkerboard screen at the moment.

Exemplarily, all the differences in the above-mentioned way 1 may be δ _ij in step 1031, where i is a natural number between [1, m], and j is a natural number between [1, m-1]; or is η _ij in step 1031, where i is a natural number between [1, m-1], and j is a natural number between [1, m]; it can also be δ _ij and η _ij in 1031.

Method 2: Obtain the highest afterimage level among the afterimage levels corresponding to all the difference values as the afterimage level of the black-and-white checkerboard image at the moment, wherein the highest afterimage level indicates that the black-and-white checkerboard image has the highest afterimage degree.

It should be noted that the determination of the afterimage level according to the maximum value of all the differences in the above method 1 is only a preferred solution, and the afterimage level may also be determined according to the average value and median value of all the differences. Any determination of the afterimage level of the black and white checkerboard picture based on the difference between the luminance values at the positions of two adjacent checkerboards falls within the protection scope of the present invention. Correspondingly, in the above-mentioned method 2, determining the afterimage level of the black-and-white checkerboard picture according to the highest afterimage level among the afterimage levels corresponding to all the difference values is only a preferred solution. The afterimage level that belongs to the same afterimage level with the largest number is used as the afterimage level of the black and white checkerboard screen.

Method 3: Obtain the afterimage levels corresponding to all the difference values as the afterimage levels of the black-and-white checkerboard screen at the moment.

It should be noted that, taking an m*m black-and-white checkerboard as an example, the afterimage level of the black-and-white checkerboard picture finally obtained by the above method 3 is a (m-1)*(m-1) matrix, which represents the black-and-white checkerboard picture. Afterimage levels at different locations. According to the level of afterimage obtained in this way, the afterimage of the display device can be corrected in a targeted manner.

104. Output the correspondence between the afterimage degree of the black and white checkerboard picture and the N time instants, where M≥N≥1.

Exemplarily, the output can be performed according to the set afterimage judgment criteria. For example, if the user needs to evaluate the display device according to the degree of afterimage at a certain moment (for example, the moment 5ms after switching to a grayscale image), the output can be output. A specific time and the afterimage degree at that time; for another example, if the user needs to evaluate the display device according to the time when the afterimage degree of the display device is a certain afterimage degree, the specific afterimage degree and the time corresponding to the afterimage degree can be output.

Exemplarily, if the afterimage level of the black and white checkerboard picture is represented by the afterimage level, the afterimage level of the black and white checkerboard picture at M (assuming M=8) times determined in the above step 103 is shown in Table 2 below:

time Afterimage level T0 LV5 T1 LV5 T2 LV4 T3 LV3 T4 LV3 T5 LV2 T6 LV2 T7 LV1

Table 2

Exemplarily, if the user needs to know the time corresponding to each afterimage level, based on the content of the above step 104, the results shown in Table 3 below can be output:

time Afterimage level T0 LV5 T2 LV4 T3 LV3 T5 LV2 T7 LV1

table 3

It should be noted that there may be multiple times corresponding to the same afterimage level. When multiple times correspond to the same level, the time corresponding to the same level determined for the first time is usually used as the time corresponding to the same level. Of course, taking the time corresponding to the same level determined for the first time as the time corresponding to the same level is just an example.

Optionally, the afterimage degree of the display device is usually determined by judging the time when the black and white checkerboard picture disappears. Therefore, the preferred implementation step of step 104 is: the afterimage degree of the output black and white checkerboard picture is determined as the preset minimum for the first time. The time of the afterimage level and the corresponding relationship with the minimum afterimage level.

In the solution provided by the present application, after the black-and-white checkerboard picture is turned on for a period of time and then switched to the gray-scale picture at M times, the luminance value of the display device corresponding to each checkerboard position in the black-and-white checkerboard picture is obtained, and according to The obtained brightness value determines the degree of afterimage of the black and white checkerboard image at each moment; the corresponding relationship between N moments and the degree of afterimage of the black and white checkerboard image is finally output. Compared with the prior art, the degree of afterimage of the display device can be determined objectively and quantifiably, and it is not necessary to observe whether the black and white checkerboard picture disappears for a long time. Therefore, the solution provided by the present application can solve the problem that the accuracy and efficiency of determining the level of afterimage of the display according to the human eye are low in the prior art.

An embodiment of the present invention provides a device 20 for detecting afterimage of a display device. As shown in FIG. 4 , the device includes: a control module 21, an acquisition module 22, a storage module 23, and a processing module 24, wherein:

The control module 21 is configured to control the display device to switch the black and white checkerboard picture to a grayscale picture after the display device uses the black and white checkerboard picture to light up for a period of time.

The acquisition module 22 is configured to acquire the luminance value of the display device corresponding to each checkerboard position in the black-and-white checkerboard screen at M moments after the control module 21 controls the display device to switch the black-and-white checkerboard picture to a grayscale screen, wherein , M≥1.

The storage module 23 is configured to store the brightness values of the display devices obtained by the M time obtaining module 22 corresponding to the positions of each checkerboard in the black-and-white checkerboard picture.

The processing module 24 is configured to determine the degree of afterimage of the black and white checkerboard image at a moment according to the brightness value at each checkerboard position in the black and white checkerboard screen stored in the storage module 23 .

The output module 25 is configured to output the correspondence between the afterimage degree of the black and white checkerboard picture determined by the processing module 24 and the N time instants set by the control module 21 , where M≥N≥1.

Optionally, the control module 21 is further configured to: align the optical fiber probe of the optical detection device with the black and white checkerboard screen, wherein each checkerboard corresponds to one fiber probe.

Optionally, the acquiring module 22 is further configured to acquire, through the optical fiber probe of the optical detection device, the brightness value of the display device corresponding to each checkerboard position in the black-and-white checkerboard picture.

Optionally, the processing module 24 is specifically used for:

According to the luminance value at each checkerboard position obtained at one moment, calculate the difference between the luminance values of every two adjacent checkerboard positions in the same row of checkerboards in each row, and/or, calculate the checkerboard for each column In the grid, the difference between the luminance values at every two adjacent checkerboard positions in the same column.

According to all the calculated differences, the afterimage level of the black and white checkerboard picture at a moment is obtained.

Optionally, the processing module 24 is specifically used for:

Obtain the afterimage level corresponding to the maximum value among all the differences, as the afterimage level of the black and white checkerboard at a moment.

Or, the highest afterimage level among the afterimage levels corresponding to all the difference values is obtained as the afterimage level of the black-and-white checkerboard image at that moment, wherein the highest afterimage level indicates that the black-and-white checkerboard image has the highest afterimage degree.

Or, the afterimage levels corresponding to all the difference values are obtained as the afterimage levels of the black-and-white checkerboard screen at that moment.

Optionally, the output module 24 is also used for:

The time when the afterimage level of the output black and white checkerboard picture is first determined as the preset minimum afterimage level and the corresponding relationship with the minimum afterimage level.

In an example, as shown in FIG. 5 , the control module 21 controls the display device 30 to light up the black and white checkerboard image for a period of time, and controls the number of optical fiber probes of the optical detection device 40 to match the black and white checkerboard during the lighting process of the black and white checkerboard image. The number of checkerboards in the grid picture is the same, and the optical fiber probe that controls the optical detection device 40 is aligned with each checkerboard in the black and white checkerboard picture. After the control module 21 controls the black-and-white checkerboard picture to light up for a period of time, it controls the display device 30 to switch the black-and-white checkerboard picture to a grayscale picture. And after switching to a grayscale picture, set M acquisition moments. The acquisition module 22 acquires, according to the M acquisition moments set by the control module 21 , the luminance value of the display device 30 corresponding to the position of each checkerboard in the black-and-white checkerboard picture. The acquired brightness value at each checkerboard position is stored in the storage module 23 . The processing module 24 determines the degree of afterimages of the black and white checkerboard images at M times according to the brightness values at each checkerboard position stored in the storage module 23 . The output module 25 determines the correspondence between the degree of afterimage of the black and white checkerboard frame determined by the processing module 24 and the N time points set by the control module 21 .

In the solution provided by the present application, after the black-and-white checkerboard picture is turned on for a period of time and then switched to the gray-scale picture at M times, the brightness value of the display device corresponding to each checkerboard position in the black-and-white checkerboard picture is obtained, and according to The obtained brightness value determines the degree of afterimage of the black and white checkerboard picture at each moment; the corresponding relationship between N moments and the afterimage degree of the black and white checkerboard picture is finally output. Compared with the prior art, the degree of afterimage of the display device can be determined objectively and quantifiably, and it is not necessary to observe whether the black and white checkerboard picture disappears for a long time. Therefore, the solution provided by the present application can solve the problem that the accuracy and efficiency of determining the level of afterimage of the display according to the human eye are low in the prior art.

It should be noted that the above storage module may include volatile memory (volatile memory), such as random-access memory (random-access memory, RAM); may also include non-volatile memory (non-volatile memory), For example, read-only memory (ROM), flash memory (flashmemory), hard disk drive (HDD) or solid-state drive (SSD); a combination of the above types of memory may also be included.

The processing module and the control module provided above may be integrated into one module, and the integrated module may be a processor, or may be a collective term for multiple processing elements. For example, the processor can be a central processing unit (CPU); it can also be other general-purpose processors, digital signal processors (digital signal processing, DSP), application specific integrated circuits (ASIC), field programmable gates Field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor, etc. ; It can also be a special-purpose processor, and the special-purpose processor can include at least one of a baseband processing chip, a radio frequency processing chip, and the like.

The acquisition module provided above may be an acquisition unit (eg, Bluetooth), or an acquisition circuit.

Those skilled in the art can clearly understand that, for the convenience and brevity of the description, for the specific working process of the modules described above, reference may be made to the corresponding process in the foregoing method embodiments, which will not be repeated here.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. a detection method of display device residual image, is characterized in that, comprises: After the display device uses the black and white checkerboard picture to light up for a period of time, the black and white checkerboard picture is switched to a grayscale picture; At M times after switching to the gray-scale picture, obtain the luminance value of the display device corresponding to each checkerboard position in the black-and-white checkerboard picture, where M≥1; Determine the degree of afterimage of the black and white checkerboard image at the time according to the luminance value at the position of each checkerboard obtained at the time; outputting the correspondence between the degree of afterimage of the black and white checkerboard and the N times, wherein M≥N≥1; Determining the degree of afterimage of the black and white checkerboard image at the time according to the brightness value at the position of each checkerboard obtained at the time, including: Calculate, according to the luminance value at each checkerboard position obtained at the moment, the difference between the luminance values at every two adjacent checkerboard positions in each row of checkerboards, and/or , calculates the difference value of the luminance values at every two adjacent checkerboard positions in the same column in each column of checkerboards; According to all the calculated differences, the afterimage level of the black and white checkerboard picture at the time is obtained. 2. The method according to claim 1, wherein, in the process of lighting the display device using a black and white checkerboard screen, the method further comprises: Aligning the fiber probe of the optical detection device with the black and white checkerboard, wherein each checkerboard corresponds to one fiber probe; The acquiring the luminance value corresponding to each checkerboard position in the black-and-white checkerboard picture by the display device includes: The brightness value of the display device corresponding to each checkerboard position in the black-and-white checkerboard picture is acquired through the optical fiber probe of the optical detection device. 3. The method according to claim 1, wherein, obtaining the afterimage level of the black and white checkerboard picture at the time according to all the differences obtained by calculation, comprising: Obtain the afterimage level corresponding to the maximum value in all the differences, as the afterimage level of the black and white checkerboard screen at the time; Or, acquiring the highest afterimage level among the afterimage levels corresponding to all the differences, as the afterimage level of the black and white checkerboard image at the time, wherein the highest afterimage level indicates that the black and white checkerboard image has the highest afterimage level. ; Or, acquire the afterimage levels corresponding to all the difference values as the afterimage levels of the black-and-white checkerboard screen at the time. 4. The method according to claim 1, wherein the outputting the correspondence between the degree of afterimage of the black and white checkerboard picture and the N described moments, comprising: Outputting the time when the afterimage degree of the black and white checkerboard picture is first determined as the preset minimum afterimage degree and the corresponding relationship with the minimum afterimage degree. 5. A detection device for display device residual image, characterized in that, comprising: a control module, configured to control the display device to switch the black and white checkerboard picture to a grayscale picture after the display device uses the black and white checkerboard picture to light up for a period of time; The acquisition module is configured to acquire, at M times after the control module controls the display device to switch the black-and-white checkerboard picture to the gray-scale picture, the display device corresponding to each of the black-and-white checkerboard pictures. The luminance values at checkerboard positions, where M≥1; a storage module, configured to store the brightness value at each checkerboard position in the black and white checkerboard picture corresponding to the display device obtained by the obtaining module at the time; A processing module, configured to determine the degree of afterimage of the black and white checkerboard picture at the time according to the brightness value at each checkerboard position in the black and white checkerboard picture stored in the storage module; an output module, configured to output the correspondence between the degree of afterimage of the black and white checkerboard screen determined by the processing module and the N time instants set by the control module, wherein M≧N≧1; The processing module is specifically used for: Calculate, according to the luminance value at each checkerboard position obtained at the moment, the difference between the luminance values at every two adjacent checkerboard positions in each row of checkerboards, and/or , calculates the difference value of the luminance values at every two adjacent checkerboard positions in the same column in each column of checkerboards; According to all the calculated differences, the afterimage level of the black and white checkerboard picture at the time is obtained. 6. The device according to claim 5, wherein the control module is further used for: Aligning the fiber probe of the optical detection device with the black and white checkerboard, wherein each checkerboard corresponds to one fiber probe; The acquisition module is further configured to acquire, through the optical fiber probe of the optical detection device, the brightness value of the display device corresponding to each checkerboard position in the black-and-white checkerboard picture. 7. The device according to claim 5, wherein the processing module is specifically configured to: Obtain the afterimage level corresponding to the maximum value in all the differences, as the afterimage level of the black and white checkerboard screen at the time; Or, acquiring the highest afterimage level among the afterimage levels corresponding to all the differences, as the afterimage level of the black and white checkerboard image at the time, wherein the highest afterimage level indicates that the black and white checkerboard image has the highest afterimage level. ; Or, acquire the afterimage levels corresponding to all the difference values as the afterimage levels of the black-and-white checkerboard screen at the time. 8. The device according to claim 5, wherein the output module is further used for: Outputting the time when the afterimage degree of the black and white checkerboard picture is first determined as the preset minimum afterimage degree and the corresponding relationship with the minimum afterimage degree.

Images