CN116612706A - Display screen detection method, display panel and display device - Google Patents
Display screen detection method, display panel and display device Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 76
- 238000009825 accumulation Methods 0.000 claims abstract description 25
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- 239000011159 matrix material Substances 0.000 claims description 3
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- 230000002860 competitive effect Effects 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- 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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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
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Abstract
The application relates to a display picture detection method, a display panel and a display device, wherein the number of pixels in a bright-dark state in a display area is determined; if the number of the pixels in the bright-dark state is not lower than the accumulated threshold value, determining whether the display area contains a sub-display area in the bright-dark state or not; if the display area includes the sub-display area in the bright-dark state, the display screen detection function is started, wherein when the number of pixels in the bright-dark state meets the accumulation threshold, whether the display area includes the sub-display area in the bright-dark state is also required to be determined, and when the display area includes the sub-display area in the bright-dark state, the display screen detection function is started, so that the problem that the display screen detection function is started by mistake due to the fact that the display screen detection is performed in the accumulation number mode is avoided.
Description
Technical Field
The present application relates to the field of display panels, and more particularly, to a display screen detection method, a display panel, and a display device.
Background
When the TFT-LCD (Thin film transistor liquid crysta ldisplay ) is driven, VCOM (common electrode) is easily interfered by the data line to generate voltage jitter, so that abnormal phenomena such as cross talk of the display screen are generated.
Currently, in order to improve the problem, a picture detection function (Pattern detection function, PDF) is introduced, but a detection method for starting the PDF function in the prior art sets the number of pixels in a dark and bright state (Pixe lon/off) to be detected, and the TCON IC adds up the number of pixels in the Pixe lon/off detected by the accumulation, and if the detected number is greater than the set number, there is a risk of false detection by adding up the number, for example, it is easy to detect part of 2Pixe lon/off pixels as Pixe lon/off, resulting in false starting of the PDF function.
Disclosure of Invention
The application provides a display screen detection method, a display panel and a display device, which are used for solving the problem that in the related art, the display screen detection is performed in a cumulative number mode, so that the display screen detection function is started by mistake.
In a first aspect, the present application provides a display screen detection method, where the display screen detection method includes: determining the number of pixels in a bright-dark state in a display area; if the number of the pixels in the bright-dark state is not lower than the accumulated threshold value, determining whether the display area contains a sub-display area in the bright-dark state or not; and if the display area comprises the sub-display area in a bright-dark state, starting a display picture detection function.
In some examples, determining whether a sub-display area in a bright-dark state is contained within the display area includes: dividing the display area according to the state of each pixel in the display area to obtain a plurality of sub-areas, wherein the states of the pixels in each sub-area are the same; if the pixels in the subareas are in a bright-dark state, taking the subareas as the sub-display areas; and if the area of any one of the sub-display areas is not lower than the target area, judging that the display area comprises the sub-display area in a bright-dark state.
In some examples, if the area of any of the sub-display areas is not less than the target area, determining that the sub-display area in the bright-dark state is included in the display area includes: comparing the number of pixel columns contained in each sub-display area with the number of preset columns, and comparing the number of pixel rows contained in each sub-display area with the number of preset rows; and if the number of the pixel columns contained in any one of the sub-display areas is not less than the preset number of columns and the number of the pixel rows contained in the sub-display areas is not less than the preset number of rows, determining that the sub-display areas in a bright-dark state are contained in the display areas.
In some examples, prior to detecting pixels in a bright-dark state within the display region, the method further comprises: acquiring the number of the pixels in the display area; the cumulative threshold value is set based on the number of pixels, the cumulative threshold value being lower than the number of pixels.
In some examples, the method further comprises, before comparing the number of pixel columns included in each of the sub-display areas with the preset number of columns and the number of pixel rows included in each of the sub-display areas with the preset number of rows: acquiring the number of pixel rows and pixel columns in the display area; the preset number of rows is set based on the number of pixel rows, and the preset number of rows is set based on the number of pixel rows.
In some examples, turning on the display detection function includes: a high-low level timing for outputting a polarity inversion control signal; and changing the polarity of the electrode corresponding to the pixel contained in the display area according to the high-low level time sequence.
In some examples, after turning on the display detection function, the method further comprises: and if the number of the pixels in the bright-dark state is lower than the accumulated threshold value and/or the sub-display area in the bright-dark state is not included in the display area, closing the display picture detection function.
In a second aspect, the present application provides a display panel, the display panel including a plurality of pixels arranged in a matrix, and a timing controller, wherein the timing controller is configured to detect pixels in a bright-dark state in a display area; the time schedule controller is also used for starting a display picture detection function when the number of pixels in a bright and dark state exceeds an accumulation threshold value and the display area comprises the sub-display area in the bright and dark state.
In some examples, the timing controller is further configured to divide the display area according to a state of each pixel in the display area to obtain a plurality of sub-areas, where the states of the pixels in each sub-area are the same; if the pixels in the subareas are in a bright-dark state, taking the subareas as the sub-display areas; and if the area of any one of the sub-display areas is not lower than the target area, judging that the sub-display area in a bright-dark state is included in the display area.
In a third aspect, there is provided a display device comprising a frame and a display panel as claimed in any one of the preceding claims, the display panel being provided on the frame.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
according to the scheme provided by the embodiment of the application, the number of pixels in a bright-dark state in a display area is determined; if the number of the pixels in the bright-dark state is not lower than the accumulated threshold value, determining whether the display area contains a sub-display area in the bright-dark state or not; if the display area includes the sub-display area in the bright-dark state, the display screen detection function is turned on, wherein in the display screen detection method provided by the example, when the number of pixels in the bright-dark state meets the accumulation threshold, whether the display area includes the sub-display area in the bright-dark state needs to be determined, and when the display area includes the sub-display area in the bright-dark state, the display screen detection function is turned on, and when the number of pixels meets the accumulation threshold, the display screen detection function is not turned on directly, so that the problem that false detection occurs when the display screen detection is performed in an accumulation number mode, and the display screen detection function is started by mistake is avoided.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a basic flow chart of a display screen detection method according to a first embodiment of the present application;
fig. 2 is a schematic diagram of a basic structure of a display panel according to a second embodiment of the present application;
fig. 3 is a schematic diagram of a basic structure of a display screen detection method according to a third embodiment of the present application;
fig. 4 is a schematic structural diagram of a display device according to a fourth embodiment of the present application;
reference numerals illustrate:
1-pixels; 2-a timing controller; 3-a frame; 4-display panel.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Example 1
In order to solve the problem that in the related art, the display screen detection is performed by the accumulated number to cause the false start of the display screen detection function, referring to fig. 1, fig. 1 is a display screen detection method according to an embodiment of the present application, where the display screen detection method includes:
s101, determining the number of pixels in a bright-dark state in a display area;
s102, if the number of the pixels in the bright-dark state is not lower than an accumulation threshold value, determining whether a sub-display area in the bright-dark state is included in the display area;
s103, if the display area comprises the sub-display area in a bright-dark state, starting a display picture detection function.
It can be understood that the display screen detection method provided in the present embodiment is applied to a display panel, where the display panel includes a display area and a non-display area, and the step S101 detects only the pixels in the display area; it can be understood that, even if the non-display area of the display panel contains pixels, step S101 does not detect pixels contained in the non-display area.
The display panel detects all pixels in a display area, acquires the state of each pixel in the display area, further acquires the number of pixels in a bright-dark state in the display area, accumulates the number of pixels in the bright-dark state to obtain accumulated number, compares the accumulated number with an accumulated threshold value, and judges that the number of the pixels in the bright-dark state is not lower than the accumulated threshold value if the accumulated number is not lower than the accumulated threshold value; otherwise, if the accumulated number is lower than the accumulated threshold value, judging that the number of the pixels in the bright-dark state is lower than the accumulated threshold value;
in some examples, if the number of pixels in the bright-dark state is lower than the accumulation threshold, the process continues to step S101 to detect the number of pixels in the bright-dark state in the display area; if the number of the pixels in the bright-dark state is not lower than the accumulated threshold value, executing the step of determining whether the sub-display area in the bright-dark state is contained in the display area; in some examples, if the number of pixels in the bright-dark state is below the cumulative threshold value, the step of determining whether a sub-display area in the bright-dark state is included within the display area is still performed.
If the display area comprises the sub-display area in a bright-dark state, starting a display picture detection function; specifically, if the number of pixels in the bright-dark state is not lower than the accumulation threshold, and if the display area includes the sub-display area in the bright-dark state, the display screen detection function is turned on, and if the number of pixels in the bright-dark state is lower than the accumulation threshold or the display area does not include the sub-display area in the bright-dark state, the display screen detection function is not turned on.
In some examples of this embodiment, determining whether a sub-display area in a bright-dark state is contained within the display area includes: dividing the display area according to the state of each pixel in the display area to obtain a plurality of sub-areas, wherein the states of the pixels in each sub-area are the same; if the pixels in the subareas are in a bright-dark state, taking the subareas as the sub-display areas; and if the area of any one of the sub-display areas is not lower than the target area, judging that the sub-display area in a bright-dark state is included in the display area.
Specifically, in this example, by acquiring the state of each pixel, a plurality of continuous pixels with the same state are divided into one region, so as to divide the display region into a plurality of sub-regions, where the state of the pixels in each sub-region is divided into two states, the first state is that the pixels in the sub-region are all bright-dark states, and the second state is that the pixels in the sub-region are not bright-dark states; when the sub-area is in a first state, namely all pixels in the sub-area are in a bright-dark state, taking the sub-area as a sub-display area, then acquiring the area of the sub-display area, and judging that the sub-display area is in the bright-dark state if the area of the sub-display area is not lower than the target area, wherein the display area comprises the sub-display area in the bright-dark state; otherwise, if the area of the sub-display area is lower than the target area, it is determined that the sub-display area is not in a bright-dark state.
In the above example, it can be understood that after the display area is divided into a plurality of sub-areas, if all the sub-areas are in the second state, that is, the pixels in all the sub-areas are not in the bright-dark state, then it is determined that the sub-display area in the bright-dark state is not included in the display area; if at least one sub-area is in a first state, namely, the pixels of at least one sub-area are in a bright-dark state, the sub-area is taken as a sub-display area; if the areas of all the sub-display areas are lower than the target area, judging that the display area does not contain the sub-display area in a bright-dark state; otherwise, if the area of at least one sub-display area is not lower than the target area, judging that the sub-display area in a bright-dark state is included in the display area.
If the area of any one of the sub-display areas is not lower than the target area, determining that the sub-display area is in a bright-dark state includes: comparing the number of pixel columns contained in each sub-display area with the number of preset columns, and comparing the number of pixel rows contained in each sub-display area with the number of preset rows; if the number of pixel columns contained in any one of the sub-display areas is not less than the preset number of columns, and the number of pixel rows contained in the sub-display areas is not less than the preset number of rows, determining that the area of the sub-display areas is not less than the target area, and the sub-display areas are in a bright-dark state.
The method comprises the steps of taking a surface area as a row and a column, acquiring pixel columns and pixel rows contained in a sub-display area, comparing the pixel columns and the pixel rows contained in the sub-display area with the number of preset columns and the number of preset rows respectively, and determining that the area of the sub-display area is not lower than a target area if the number of the pixel columns contained in the sub-display area is not lower than the number of the preset rows and the number of the pixel rows contained in the sub-display area is not lower than the number of the preset rows, wherein the sub-display area is in a bright-dark state, and the sub-display area in the bright-dark state is contained in the display area; otherwise, if the number of pixel columns included in the sub-display area is less than the preset number of columns or the number of pixel rows is less than the preset number of rows, determining that the area of the sub-display area is less than the target area, and at this time, determining that the sub-display area is not in a bright-dark state.
In some examples of this embodiment, prior to detecting pixels in a bright-dark state within the display region, the method further comprises: acquiring the number of the pixels in the display area; setting the cumulative threshold value based on the number of pixels, the cumulative threshold value being lower than the number of pixels; it can be understood that the specific value of the accumulation threshold is not limited, and can be flexibly set by related personnel, so that the accumulation threshold is lower than the number of pixels contained in the display area; preferably, the cumulative threshold value is one-half the number of pixels in the display area.
Taking N pixels as an accumulation threshold value, acquiring pixels in a bright-dark state in a display area, and recording the accumulation sum of the pixels in the bright-dark state as M, wherein if M is more than or equal to N/2, the number of the pixels in the bright-dark state is judged to be not lower than the accumulation threshold value; otherwise, if M < N/2, the number of pixels in the bright-dark state is determined to be lower than the accumulation threshold.
In some examples of this embodiment, the method further includes, before comparing the number of pixel columns included in each of the sub-display areas with the preset number of columns and the number of pixel rows included in each of the sub-display areas with the preset number of rows: acquiring the number of pixel rows and pixel columns in the display area; setting the preset number of lines based on the number of pixel lines, and setting the preset number of lines based on the number of pixel lines; the specific values of the preset number of rows and/or the preset number of columns are not limited, and may be flexibly set by related personnel, so that the preset number of rows is lower than the number of pixel rows contained in the display area, and the preset number of columns is lower than the number of pixel columns contained in the display area.
In some examples, the predetermined number of rows is one-half of the number of rows of pixels contained in the display area, and the predetermined number of columns is one-half of the number of columns of pixels contained in the display area; in some examples, the number of preset rows corresponds to the number of preset columns, e.g., the number of preset rows is 100 and the number of preset columns is 100.
In some examples of this embodiment, turning on the display detection function includes: a high-low level timing for outputting a polarity inversion control signal; and changing the polarity of the electrode corresponding to the pixel contained in the display area according to the high-low level time sequence. The polarity of the electrode corresponding to the pixel in the display area is changed, so that the display screen is prevented from being abnormal.
In some examples of this embodiment, after turning on the display detection function, the method further includes: and if the number of the pixels in the bright-dark state is lower than the accumulated threshold value and/or the sub-display area in the bright-dark state is not included in the display area, closing the display picture detection function. It can be understood that after the display screen detection function is turned on, the display panel continues to execute step S101 to determine the number of pixels in a bright-dark state in the display area, and turns off the display screen detection function when the number of pixels in the bright-dark state is lower than the accumulation threshold or the display area does not include the sub-display area in the bright-dark state; if the number of the pixels in the bright-dark state is not lower than the accumulated threshold value and the display area is determined to contain the sub-display area in the bright-dark state, the display screen detection function is maintained to be started.
According to the display picture detection method provided by the embodiment, the number of pixels in a bright-dark state in a display area is determined; if the number of the pixels in the bright-dark state is not lower than the accumulated threshold value, determining whether the display area contains a sub-display area in the bright-dark state or not; if the display area includes the sub-display area in the bright-dark state, the display screen detection function is turned on, wherein in the display screen detection method provided by the example, when the number of pixels in the bright-dark state meets the accumulation threshold, whether the display area includes the sub-display area in the bright-dark state needs to be determined, and when the display area includes the sub-display area in the bright-dark state, the display screen detection function is turned on, and when the number of pixels meets the accumulation threshold, the display screen detection function is not turned on directly, so that the problem that false detection occurs when the display screen detection is performed in an accumulation number mode, and the display screen detection function is started by mistake is avoided.
Example two
Based on the same concept, as shown in fig. 2, the present embodiment provides a display panel, which includes a plurality of pixels 1 arranged in a matrix, and a timing controller 2, wherein the timing controller 2 is configured to determine the number of pixels 1 in a bright-dark state in a display area; the timing controller 2 is further configured to turn on a display screen detection function when the number of pixels 1 in a bright-dark state exceeds an accumulation threshold and the display area includes the sub-display area in the bright-dark state.
In some examples of embodiments, the timing controller 2 is further configured to divide the display area according to a state of each pixel 1 in the display area, to obtain a plurality of sub-areas, where the state of each pixel 1 in the sub-area is the same; if the pixels 1 in the subareas are in a bright-dark state, taking the subareas as the sub-display areas; and if the area of any one of the sub-display areas is not lower than the target area, judging that the sub-display area in a bright-dark state is included in the display area.
In some examples, if the area of any of the sub-display areas is not lower than the target area, determining that the sub-display area is in a bright-dark state includes: comparing the number of 1 columns of pixels contained in each sub-display area with the number of preset columns, and comparing the number of 1 rows of pixels contained in each sub-display area with the number of preset rows; if the number of the pixel 1 columns contained in any one of the sub-display areas is not less than the preset number of columns, and the number of the pixel 1 rows contained in the sub-display areas is not less than the preset number of rows, determining that the area of the sub-display areas is not less than the target area, and the display areas contain the sub-display areas in a bright-dark state.
In some examples, before detecting the pixel 1 in the bright-dark state within the display area, the method further comprises: acquiring the number of the pixels 1 in the display area; the integration threshold is set based on the number of pixels 1, the integration threshold being lower than the number of pixels 1.
In some examples, the method further comprises, before comparing the number of columns of pixels 1 included in each of the sub-display areas with the preset number of columns and the number of rows of pixels 1 included in each of the sub-display areas with the preset number of rows: acquiring the number of the pixel 1 rows and the pixel 1 columns in the display area; the preset number of rows is set based on the number of rows of pixels 1, and the preset number of rows is set based on the number of rows of pixels 1.
In some examples, turning on the display detection function includes: a high-low level timing for outputting a polarity inversion control signal; and changing the polarity of the electrode corresponding to the pixel 1 contained in the display area according to the high-low level time sequence.
In some examples, after turning on the display detection function, the method further comprises: and if the number of the pixels 1 in the bright-dark state is lower than the accumulated threshold value and/or the sub-display area in the bright-dark state is not included in the display area, turning off the display picture detection function.
It can be understood that the timing controller 2 of the display panel provided in this embodiment can execute each step of the above-mentioned display screen detection method to achieve the same technical effects as each step of the above-mentioned display screen detection method, and will not be described in detail herein.
Example III
The embodiment of the application provides a display screen detection method, as shown in fig. 3, fig. 3 is a basic flow diagram of the display screen detection method;
in order to avoid false detection, when the pattern (picture) required to be detected by the Timing Controller (TCON) of the display panel reaches the cumulative mode starting PDF condition, the area mode is increased.
Specifically, the pixels of the display area are divided into an X axis and a Y axis, and the values of X and Y are set. Take pixe lon/off, pattern, x=100line, y=100 pixel as an example. The display area must have 100 columns 100 consecutive pixe lon/off, and the threshold value set by the area mode is reached, so that the condition of the area mode is satisfied. When the conditions detected by the PDF meet the accumulation mode and the area mode simultaneously, the PDF is started. By combining the two modes, false detection can be effectively avoided. Under the dual-mode detection condition of the accumulation mode and the area mode, the PDF detection rate can be improved, and the occurrence of false detection can be reduced. The competitive power of the product can be effectively improved, the taste problem caused by false detection is avoided, and further benefits are obtained.
Example IV
An embodiment of the present application provides a display device, as shown in fig. 4, including a frame 3 and a display panel 4 as described above, the display panel 4 being disposed on the frame 3.
The embodiment of the application also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the display screen detection method provided in any one of the method embodiments described above.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The display screen detection method is characterized by comprising the following steps:
determining the number of pixels in a bright-dark state in a display area;
if the number of the pixels in the bright-dark state is not lower than the accumulated threshold value, determining whether the display area contains a sub-display area in the bright-dark state or not;
and if the display area comprises the sub-display area in a bright-dark state, starting a display picture detection function.
2. The method of claim 1, wherein determining whether the display area includes a sub-display area in a bright-dark state comprises:
dividing the display area according to the state of each pixel in the display area to obtain a plurality of sub-areas, wherein the states of the pixels in each sub-area are the same;
if the pixels in the subareas are in a bright-dark state, taking the subareas as the sub-display areas;
and if the area of any one of the sub-display areas is not lower than the target area, judging that the sub-display area in a bright-dark state is included in the display area.
3. The method of claim 2, wherein if the area of any one of the sub-display areas is not lower than a target area, determining that the sub-display area in a bright-dark state is included in the display area comprises:
comparing the number of pixel columns contained in each sub-display area with the number of preset columns, and comparing the number of pixel rows contained in each sub-display area with the number of preset rows;
and if the number of the pixel columns contained in any one of the sub-display areas is not less than the preset number of columns and the number of the pixel rows contained in the sub-display areas is not less than the preset number of rows, determining that the sub-display areas in a bright-dark state are contained in the display areas.
4. The method of claim 1, wherein before detecting pixels in a bright-dark state in a display area, the method further comprises:
acquiring the number of the pixels in the display area;
the cumulative threshold value is set based on the number of pixels, the cumulative threshold value being lower than the number of pixels.
5. The method of claim 3, wherein the comparing the number of pixel columns in each sub-display area with the number of preset columns, and the comparing the number of pixel rows in each sub-display area with the number of preset columns, further comprises:
acquiring the number of pixel rows and pixel columns in the display area;
the preset number of rows is set based on the number of pixel rows, and the preset number of rows is set based on the number of pixel rows.
6. The method of claim 1, wherein turning on a display detection function comprises:
a high-low level timing for outputting a polarity inversion control signal;
and changing the polarity of the electrode corresponding to the pixel contained in the display area according to the high-low level time sequence.
7. The display screen detection method according to claim 1, wherein after turning on the display screen detection function, the method further comprises:
and if the number of the pixels in the bright-dark state is lower than the accumulated threshold value and/or the sub-display area in the bright-dark state is not included in the display area, closing the display picture detection function.
8. A display panel comprising a plurality of pixels arranged in a matrix and a timing controller, wherein the timing controller is configured to determine the number of pixels in a bright-dark state within a display area;
the time schedule controller is also used for starting a display picture detection function when the number of pixels in a bright-dark state exceeds an accumulation threshold value and the display area comprises a sub-display area in the bright-dark state.
9. The display panel of claim 8, wherein the timing controller is further configured to divide the display area according to a state of each pixel in the display area to obtain a plurality of sub-areas, wherein the states of the pixels in each sub-area are the same; if the pixels in the subareas are in a bright-dark state, taking the subareas as the sub-display areas; and if the area of any one of the sub-display areas is not lower than the target area, judging that the sub-display area in a bright-dark state is included in the display area.
10. A display device comprising a frame and a display panel according to any one of claims 8-9, the display panel being arranged on the frame.
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