CN112599059A - Method and device for detecting electrical dark spots of display device - Google Patents
Method and device for detecting electrical dark spots of display device Download PDFInfo
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Abstract
The invention provides an electric dark spot detection method and device of a display device, comprising the following steps: selecting a display device to be tested comprising at least one specific detection stage; respectively connecting a display device to be detected to a reference voltage, a first voltage and a second voltage in a specific detection stage; the first voltage is greater than the reference voltage and greater than the second voltage; respectively acquiring first image information, second image information and third image information of a display device to be tested under a reference voltage, a first voltage and a second voltage; and judging whether the display device to be tested has the electric dark spot or not according to the first image information, the second image information and the third image information. That is to say, by obtaining the first image information, the second image information and the third image information with different image display intensities under different voltage conditions, the comprehensive detection of the electrical dark spots of the display device to be detected is realized, the detection precision of the electrical dark spots of the display device is improved, and the actual use performance of the display device is further improved.
Description
Technical Field
The invention relates to the technical field of display device detection, in particular to a method and a device for detecting an electric dark spot of a display device.
Background
With the continuous development of science and technology, various display devices have been widely applied to the life and work of people, and bring great convenience to the daily life of people.
However, in the conventional detection process of the display device, various defects of the display panel, such as weak electrical dark spots, cannot be effectively detected, so that the practical use performance of the display device is poor.
Disclosure of Invention
In view of the above, in order to solve the above problems, the present invention provides a method and a device for detecting an electrical dark spot of a display device, the technical solution is as follows:
an electrical dark spot detection method of a display device, the electrical dark spot detection method comprising:
selecting a display device to be tested, wherein the display device to be tested comprises at least one specific detection stage;
in the specific detection stage, the display device to be detected is respectively connected with a reference voltage, a first voltage and a second voltage; wherein the first voltage is greater than the reference voltage and greater than the second voltage;
respectively acquiring first image information of the display device to be tested under the reference voltage, second image information of the display device to be tested under the first voltage and third image information of the display device to be tested under the second voltage;
and judging whether the display device to be tested has an electric dark spot or not according to the first image information, the second image information and the third image information.
Optionally, in the above method for detecting an electrical dark spot, in the specific detection stage, the display device to be detected is used for displaying red, green or blue.
Optionally, in the above method for detecting an electrical dark spot, the specific detection stage includes: a first specific detection phase, a second specific detection phase and a third specific detection phase;
in the first specific detection stage, the display device to be detected is used for displaying red;
in the second specific detection stage, the display device to be detected is used for displaying green;
in the third specific detection stage, the display device under test is used for displaying blue.
Optionally, in the electrical dark spot detection method, the reference voltage ranges from 7.8V to 8.2V.
Optionally, in the electrical dark spot detection method, the first voltage is in a range of 9.8V to 10.2V.
Optionally, in the electrical dark spot detection method, the second voltage is in a range of 4.8V to 5.2V.
Optionally, in the above method for detecting an electrical dark spot, the display device to be detected includes: a plurality of said specific detection phases;
in each of the specific detection phases, the reference voltages are the same;
and/or the first voltages are the same;
and/or the second voltages are the same.
Optionally, in the method for detecting an electrical dark spot, the determining whether the display device to be tested has the electrical dark spot according to the first image information, the second image information, and the third image information includes:
acquiring a weak electric property dark spot area in the first image information;
judging whether the intensity of the weak electric property dark spot area changes or not based on the second image information and the third image information;
if so, indicating that the display device to be tested has weak electric property dark spots;
if not, the display device to be tested does not have weak electric property dark spots.
Optionally, in the above method for detecting an electrical dark spot, the display device to be detected further includes at least one gray scale detection stage;
in the gray scale detection stage, the display device to be detected is connected to the third voltage; wherein the third voltage is equal to the reference voltage;
acquiring fourth image information of the display device to be tested under the third voltage;
and judging whether the gray scale display of the display device to be tested is normal or not according to the fourth image information.
Optionally, in the above method for detecting an electrical dark spot, the display device to be detected includes: a plurality of said gray scale detection stages;
in each gray scale detection stage, the third voltages are the same, and the gray scale number of the image displayed by the display device to be detected is different.
Optionally, in the above method for detecting an electrical dark spot, the display device to be detected further includes at least one transition detection stage;
in the transition detection stage, the display device to be detected is connected to the fourth voltage; wherein the fourth voltage is equal to the reference voltage.
Optionally, in the above method for detecting an electrical dark spot, in the transition detection stage, the display device to be detected is used for displaying white or black.
An electrical dark spot detection device for a display device, the electrical dark spot detection device comprising:
the device comprises a pre-preparation module, a detection module and a display module, wherein the pre-preparation module is used for selecting a display device to be detected, and the display device to be detected comprises at least one specific detection stage;
the voltage control module is used for respectively connecting the display device to be detected with reference voltage, first voltage and second voltage in the specific detection stage; wherein the first voltage is greater than the reference voltage and greater than the second voltage;
the image acquisition module is used for respectively acquiring first image information of the display device to be detected under the reference voltage, second image information of the display device to be detected under the first voltage and third image information of the display device to be detected under the second voltage;
and the electrical dark spot judging module is used for judging whether the display device to be tested has electrical dark spots or not according to the first image information, the second image information and the third image information.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides an electric dark spot detection method of a display device, which comprises the following steps: selecting a display device to be tested, wherein the display device to be tested comprises at least one specific detection stage; in the specific detection stage, the display device to be detected is respectively connected with a reference voltage, a first voltage and a second voltage; wherein the first voltage is greater than the reference voltage and greater than the second voltage; respectively acquiring first image information of the display device to be tested under the reference voltage, second image information of the display device to be tested under the first voltage and third image information of the display device to be tested under the second voltage; and judging whether the display device to be tested has an electric dark spot or not according to the first image information, the second image information and the third image information. That is to say, by obtaining the first image information, the second image information and the third image information with different image display intensities under different voltage conditions, the comprehensive detection of the electrical dark spots of the display device to be detected is realized, the detection precision of the electrical dark spots of the display device is improved, and the actual use performance of the display device is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating an electrical dark spot detection method of a display device according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating an electrical dark spot detection of a display device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating electrical dark spot detection of another display device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating an electrical dark spot detection of another display device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating an electrical dark spot detection of another display device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating an electrical dark spot detection of another display device according to an embodiment of the present invention;
FIG. 7 is a flowchart illustrating an electrical dark spot detection method for a display device according to another embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating electrical dark spot detection of another display device according to an embodiment of the present invention;
FIG. 9 is a schematic diagram illustrating electrical dark spot detection of another display device according to an embodiment of the present invention;
FIG. 10 is a schematic diagram illustrating electrical dark spot detection of another display device according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of an electrical dark spot detection device of a display device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. It should be noted that the embodiments provided in the embodiments of the present invention can be combined with each other without contradiction.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, fig. 1 is a schematic flow chart illustrating an electrical dark spot detection method of a display device according to an embodiment of the present invention.
The electric dark spot detection method comprises the following steps:
s101: selecting a display device to be tested, wherein the display device to be tested comprises at least one specific detection stage.
S102: in the specific detection stage, the display device to be detected is respectively connected with a reference voltage, a first voltage and a second voltage; wherein the first voltage is greater than the reference voltage and greater than the second voltage.
S103: and respectively acquiring first image information of the display device to be tested under the reference voltage, second image information of the display device to be tested under the first voltage and third image information of the display device to be tested under the second voltage.
S104: and judging whether the display device to be tested has an electric dark spot or not according to the first image information, the second image information and the third image information.
In this embodiment, referring to fig. 2, fig. 2 is a schematic diagram illustrating an electrical dark spot detection of a display device according to an embodiment of the present invention, in the specific detection stage 11, after the display device to be tested is connected to the reference voltage, the display device to be tested is controlled to display an image with a preset color, and after the display is stable, the first image information is obtained.
And after the first image information is acquired, the display device to be tested is connected to the first voltage, the display device to be tested is controlled to display the image with the preset color, and the second image information is acquired after the display is stable.
Since the first voltage is greater than the reference voltage, the image display intensity of the second image information is greater than the image display intensity of the first image information, that is, the image display effect of the first image information is enhanced, it should be noted that the image display intensity is mainly reflected in the image display brightness.
And after the second image information is acquired, the display device to be tested is connected to the second voltage, the display device to be tested is controlled to display the image with the preset color, and the third image information is acquired after the display is stable.
Since the second voltage is less than the reference voltage, the image display intensity of the third image information is less than the image display intensity of the first image information, that is, the image display effect of the first image information is weakened, and it should be noted that the image display intensity is mainly reflected in the image display brightness.
Most obvious electrical dark spot defects in the display device to be detected can be detected based on the first image information, but based on some weak electrical dark spot defects, whether the weak electrical dark spot defects really exist or not cannot be confirmed only by the first image information.
Therefore, in the embodiment of the present invention, on the basis of the determination result of the first image information, whether the intensity of the weak dark spot is changed is further determined by combining the second image information (enhanced image information corresponding to the first image information) and the third image information (reduced image information corresponding to the first image information), and if the intensity of the weak dark spot is changed, it indicates that the display device under test has the weak dark spot defect.
That is to say, the electrical dark spot detection method provided in the embodiment of the present invention realizes comprehensive detection of electrical dark spots of the display device to be detected through the first image information, the second image information, and the third image information with different image display intensities, and improves the actual use performance of the display device. The colors of the display screens of the first image information, the second image information, and the third image information are the same.
It should be noted that, for both a Display device to be tested based on a Liquid Crystal Display (LCD) or an Organic Light Emitting Diode (OLED) Display device to be tested, the reference voltage is an external voltage supply signal, and is connected to a pixel circuit through a voltage interface of the pixel circuit in the Display device to be tested, so as to provide a driving voltage signal for the pixel circuit, and further control a Light Emitting current of the Display device to be tested, so that the Display device to be tested displays image information with a brightness corresponding to the Light Emitting current.
In addition, the reference voltage may be directly subjected to voltage adjustment to obtain the first voltage signal, or a voltage interface of a pixel circuit in the display device to be tested may be connected to a voltage supply port of the first voltage signal, which is not limited in the embodiment of the present invention.
Similarly, the reference voltage may be directly subjected to voltage adjustment to obtain the second voltage signal, or a voltage interface of a pixel circuit in the display device to be tested may be connected to a voltage supply port of the second voltage signal, which is not limited in the embodiment of the present invention.
Then, the pixel circuit in the display device to be tested can realize different light-emitting currents based on the driving voltage signals with different voltages, so as to change the brightness parameter of the image displayed by the display device to be tested.
That is, in the embodiment of the present invention, the main difference between the first image information, the second image information, and the third image information is the difference in image display luminance.
Optionally, based on the above embodiment of the present invention, referring to fig. 3, fig. 3 is a schematic diagram of detecting an electrical dark spot of another display device according to the embodiment of the present invention.
In the specific detection phase 11, the display device under test is used to display red.
Alternatively, referring to fig. 4, fig. 4 is a schematic diagram illustrating an electrical dark spot detection of another display device according to an embodiment of the present invention.
In the specific detection phase 11, the display device under test is used to display green.
Alternatively, referring to fig. 5, fig. 5 is a schematic diagram illustrating an electrical dark spot detection of another display device according to an embodiment of the present invention.
In the specific detection phase 11, the display device under test is used to display blue.
In this embodiment, the display device under test displays images of the same color, red, green, or blue, at the reference voltage, the first voltage, and the second voltage.
By adopting any one of RGB three primary colors, the electric dark spot defect of the display device to be detected can be better detected compared with other colors.
In the specific detection stage 11, the display device to be detected only displays one color, so that the influence of other variables on the detection result is further reduced, and the detection accuracy of the electrical dark spot defect of the display device to be detected is further improved.
Optionally, based on the above embodiment of the present invention, referring to fig. 6, fig. 6 is a schematic diagram of detecting an electrical dark spot of another display device according to an embodiment of the present invention.
The specific detection phase 11 comprises: a first specific detection phase 12, a second specific detection phase 13 and a third specific detection phase 14;
in the first specific detection stage 12, the display device under test is used to display red;
in the second specific detection stage 13, the display device to be tested is used for displaying green;
in the third specific inspection phase 14, the display device under test is used to display blue.
In this embodiment, in the first specific detection stage 12, after the display device under test is switched in the reference voltage, the display device under test is controlled to display a red image, and after the display is stabilized, the first image information is acquired.
After the first image information is acquired, the display device to be tested is connected to the first voltage, the display device to be tested is controlled to display a red image, and after the display is stable, the second image information is acquired.
Since the first voltage is greater than the reference voltage, the image display intensity of the second image information is greater than that of the first image information, i.e. the image display effect of the first image information is enhanced.
And after the second image information is acquired, the display device to be tested is connected to the second voltage, the display device to be tested is controlled to display a red image, and the third image information is acquired after the display is stable.
Since the second voltage is smaller than the reference voltage, the image display intensity of the third image information is smaller than that of the first image information, i.e., the image display effect of the first image information is reduced.
Through the first image information, the second image information and the third image information which are obtained in the first specific detection stage 12 and have different red image display intensities, the comprehensive detection of the electric dark spots of the display device to be detected is realized, and the actual use performance of the display device is improved.
In order to further realize the comprehensive detection of the electrical dark spots of the display device to be detected, the display color of the display device to be detected is changed in the second specific detection stage 13, and the electrical dark spot detection is performed again, that is:
in the second specific detection stage 13, after the display device to be tested is connected to the reference voltage, the display device to be tested is controlled to display a green image, and after the display is stable, the first image information is acquired.
After the first image information is acquired, the display device to be tested is connected to the first voltage, the display device to be tested is controlled to display a green image, and after the display is stable, the second image information is acquired.
Since the first voltage is greater than the reference voltage, the image display intensity of the second image information is greater than that of the first image information, i.e. the image display effect of the first image information is enhanced.
And after the second image information is acquired, the display device to be tested is connected to the second voltage, the display device to be tested is controlled to display a green image, and the third image information is acquired after the display is stable.
Since the second voltage is smaller than the reference voltage, the image display intensity of the third image information is smaller than that of the first image information, i.e., the image display effect of the first image information is reduced.
Through the first image information, the second image information and the third image information which are obtained in the second specific detection stage 13 and have different green image display intensities, the comprehensive detection of the electric dark spots of the display device to be detected is realized, and the actual use performance of the display device is improved.
In order to further realize the comprehensive detection of the electrical dark spots of the display device to be detected, the display color of the display device to be detected is changed in the third specific detection stage 14, and the electrical dark spot detection is performed again, that is:
in the third specific detection stage 14, after the display device under test is switched in the reference voltage, the display device under test is controlled to display a blue image, and after the display is stable, the first image information is acquired.
After the first image information is acquired, the display device to be tested is connected to the first voltage, the display device to be tested is controlled to display a blue image, and after the display is stable, the second image information is acquired.
Since the first voltage is greater than the reference voltage, the image display intensity of the second image information is greater than that of the first image information, i.e. the image display effect of the first image information is enhanced.
And after the second image information is acquired, the display device to be tested is connected to the second voltage, the display device to be tested is controlled to display a blue image, and the third image information is acquired after the display is stable.
Since the second voltage is smaller than the reference voltage, the image display intensity of the third image information is smaller than that of the first image information, i.e., the image display effect of the first image information is reduced.
Through the first image information, the second image information and the third image information which are obtained in the third specific detection stage 14 and have different blue image display intensities, the comprehensive detection of the electric dark spots of the display device to be detected is realized, and the actual use performance of the display device is improved.
That is, the embodiment of the invention divides the specific detection stage 11 into three specific detection stages, and performs the electrical dark spot detection in the detection stages displaying the red image, the green image and the blue image, respectively, thereby improving the detection accuracy of the electrical dark spot defect of the display device to be detected in different detection environments.
Optionally, based on the above embodiment of the present invention, the display device to be tested includes: a plurality of said specific detection phases; for example a first specific detection phase 12, a second specific detection phase 13 and a third specific detection phase 14.
In each of the specific detection phases, the reference voltages are the same;
and/or the first voltages are the same;
and/or the second voltages are the same.
In this embodiment, in each of the specific detection stages, the voltage condition for controlling the access to the display device to be detected is the same, so that the influence of the variable on the detection result is further reduced, and the detection accuracy of the electrical dark spot defect of the display device to be detected is further improved.
Optionally, based on the above embodiment of the present invention, referring to fig. 7, fig. 7 is a schematic flow chart of another method for detecting an electrical dark spot of a display device according to an embodiment of the present invention.
Step S104: according to the first image information, the second image information and the third image information, whether the display device to be tested has an electric dark spot is judged, and the method specifically comprises the following steps:
s1041: acquiring a weak electric property dark spot area in the first image information;
s1042: judging whether the intensity of the weak electric property dark spot area changes or not based on the second image information and the third image information;
s1043: if so, indicating that weak electric dark spots exist in the display device to be tested;
s1044: if not, the display device to be tested does not have weak electric property dark spots.
In this embodiment, most of the obvious electrical dark spot defects in the display device to be tested can be detected based on the first image information, but based on some weak electrical dark spot defects, it is not possible to determine whether the weak electrical dark spot defects really exist only by the first image information.
Therefore, in the embodiment of the present invention, on the basis of the determination result of the first image information, whether the intensity of the weak dark spot is changed is further determined by combining the second image information (the enhanced image information corresponding to the first image information) and the third image information (the weakened image information corresponding to the first image information), and if the intensity of the weak dark spot is changed, it indicates that the weak dark spot defect exists in the weak dark spot area of the display device to be tested.
And if the weak electric property dark spot defect does not exist in the weak electric property dark spot area of the display device to be tested, judging whether the weak electric property dark spot defect does not exist in the weak electric property dark spot area.
That is to say, the electrical dark spot detection method provided in the embodiment of the present invention realizes comprehensive detection of electrical dark spots of the display device to be detected through the first image information, the second image information, and the third image information with different image display intensities, and improves the actual use performance of the display device.
Optionally, based on the above embodiment of the present invention, referring to fig. 8, fig. 8 is a schematic diagram of detecting an electrical dark spot of another display device according to an embodiment of the present invention.
The display device to be tested also comprises at least one gray scale detection stage 15;
in the gray scale detection stage 15, the display device to be detected is connected to the third voltage; wherein the third voltage is equal to the reference voltage;
acquiring fourth image information of the display device to be tested under the third voltage;
and judging whether the gray scale display of the display device to be tested is normal or not according to the fourth image information.
In this embodiment, a gray scale detection stage 15 is taken as an example for explanation, in the gray scale detection stage 15, after the display device under test is connected to the third voltage, the display device under test is controlled to display an image with a preset gray scale (for example, the gray scale is 40 or 63), and after the display is stable, the fourth image information is acquired.
Judging whether the gray scale display of the display device to be tested is normal or not based on the fourth image information; firstly, the gray scale display test of the display device to be tested is realized.
Secondly, under the condition that the gray scale display is normal, the subsequent electric dark spot detection of the display device to be detected is carried out, and a third voltage is set to be equal to the reference voltage; that is to say, under the same voltage condition, it is ensured that other factors of the display device to be detected do not affect the detection result of the electrical dark spot detection of the display device to be detected, and the influence of other factors on the detection result is further reduced, so that the detection accuracy of the electrical dark spot defect of the display device to be detected is improved.
Optionally, based on the above embodiment of the present invention, referring to fig. 9, fig. 9 is a schematic diagram of detecting an electrical dark spot of another display device according to an embodiment of the present invention.
The display device to be tested includes: a plurality of said gray scale detection stages 15;
in each of the gray scale detection stages 15, the third voltages are the same, and the gray scale numbers of the images displayed by the display device to be tested are different.
In this embodiment, two gray scale detection stages are taken as an example for explanation, in the first gray scale detection stage 16, after the display device to be tested is connected to the third voltage, the display device to be tested is controlled to display an image with a gray scale of 40; in the second gray scale detection stage 17, after the display device to be tested is connected to the third voltage, the display device to be tested is controlled to display an image with a gray scale of 63.
Based on the image information of the two gray scale detection stages, whether the gray scale display of the display device to be detected is normal or not is further comprehensively judged, and the gray scale detection precision is improved.
And the detection accuracy of the electric dark spot defects of the display device to be detected is also ensured.
It should be noted that, in the embodiment of the present invention, only the gray levels 40 and 63 are taken as examples for description, and the image quality of the gray-level display image is the best at the gray-level value.
Optionally, based on the above embodiment of the present invention, referring to fig. 10, fig. 10 is a schematic diagram of detecting an electrical dark spot of another display device according to an embodiment of the present invention.
The display device to be tested also comprises at least one transition detection stage;
in the transition detection stage, the display device to be detected is connected to the fourth voltage; wherein the fourth voltage is equal to the reference voltage.
Optionally, in the transition detection stage, the display device to be detected is used for displaying white or black.
In this embodiment, four transition detection stages are taken as an example for explanation, before the grayscale detection stage 15, a first transition detection stage 18 is executed, in the first transition detection stage 18, after the display device under test is connected to the fourth voltage, the display device under test is controlled to display a black image, and after the display is stable, the test process of the grayscale detection stage 15 is executed again to improve the image display quality in the grayscale detection stage 15.
After the specific detection phase 11, a second transition detection phase 19 is executed, in the second transition detection phase 19, after the display device under test is switched in the fourth voltage, the display device under test is controlled to display a white image, and after the display is stable, a third transition detection phase 20 and a fourth transition detection phase 21 are executed in sequence.
It should be noted that the third transition detection stage 20 and the fourth transition detection stage 21 are generally two reset stages, which ensure that the display device to be detected can be successfully reset, and thus, the detection process of the display device to be detected is completed.
Optionally, based on the above embodiment of the present invention, the reference voltage ranges from 7.8V to 8.2V.
In this embodiment, the reference voltage includes, but is not limited to, 7.9V, 8V, 8.1V, and the like, and it is ensured that the display device under test displays an image with better image quality within the reference voltage range, which is more convenient for the detection of the display device under test.
Optionally, based on the above embodiment of the present invention, the first voltage is in a range of 9.8V to 10.2V.
In this embodiment, the first voltage includes, but is not limited to, 9.9V, 10V, 10.1V, etc., and in this first voltage range, it can be ensured that the display device under test displays an image with better image quality, and the image displayed under the reference voltage condition is clearly distinguished, and the image display intensity is not excessively enhanced.
Optionally, based on the above embodiment of the present invention, the second voltage is in a range of 4.8V to 5.2V.
In this embodiment, the second voltage includes, but is not limited to, 4.9V, 5V, 5.1V, and the like, and in this second voltage range, the display device under test can be ensured to display an image with better image quality, and the image is clearly distinguished from an image displayed under the reference voltage condition, and the image display intensity is not excessively weakened.
Optionally, based on all the above embodiments of the present invention, in another embodiment of the present invention, an electrical dark spot detection apparatus for a display device is further provided, referring to fig. 11, and fig. 11 is a schematic structural diagram of the electrical dark spot detection apparatus for a display device according to the embodiment of the present invention.
The electric dark spot detection device comprises:
a pre-preparation module 22 for selecting a display device to be tested, the display device to be tested comprising at least one specific detection stage;
the voltage control module 23 is configured to access the display device to be tested to a reference voltage, a first voltage, and a second voltage respectively in the specific detection stage; wherein the first voltage is greater than the reference voltage and greater than the second voltage;
an image obtaining module 24, configured to obtain first image information of the display device to be tested at the reference voltage, second image information of the display device to be tested at the first voltage, and third image information of the display device to be tested at the second voltage, respectively;
and an electrical dark spot determining module 25, configured to determine whether an electrical dark spot exists on the display device to be tested according to the first image information, the second image information, and the third image information.
It should be noted that the principle of the electrical dark spot detection apparatus provided in the embodiment of the present invention is the same as that of the electrical dark spot detection method provided in the above-mentioned embodiment of the present invention, and is not repeated herein.
The method and the device for detecting the electrical dark spots of the display device provided by the invention are described in detail, the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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 or 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. 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 invention. Thus, the present invention 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 (13)
1. An electrical dark spot detection method of a display device, the electrical dark spot detection method comprising:
selecting a display device to be tested, wherein the display device to be tested comprises at least one specific detection stage;
in the specific detection stage, the display device to be detected is respectively connected with a reference voltage, a first voltage and a second voltage; wherein the first voltage is greater than the reference voltage and greater than the second voltage;
respectively acquiring first image information of the display device to be tested under the reference voltage, second image information of the display device to be tested under the first voltage and third image information of the display device to be tested under the second voltage;
and judging whether the display device to be tested has an electric dark spot or not according to the first image information, the second image information and the third image information.
2. The method according to claim 1, wherein the display device under test is configured to display red, green, or blue in the specific testing phase.
3. The electrical dark spot detection method of claim 2, wherein the specific detection phase comprises: a first specific detection phase, a second specific detection phase and a third specific detection phase;
in the first specific detection stage, the display device to be detected is used for displaying red;
in the second specific detection stage, the display device to be detected is used for displaying green;
in the third specific detection stage, the display device under test is used for displaying blue.
4. The electrical dark spot detection method of claim 1, wherein the reference voltage is in a range of 7.8V to 8.2V.
5. The electrical dark spot detection method of claim 1, wherein the first voltage is in a range of 9.8V to 10.2V.
6. The electrical dark spot detection method of claim 1, wherein the second voltage is in a range of 4.8V to 5.2V.
7. The method of claim 1, wherein the display device under test comprises: a plurality of said specific detection phases;
in each of the specific detection phases, the reference voltages are the same;
and/or the first voltages are the same;
and/or the second voltages are the same.
8. The method of claim 1, wherein the determining whether the display device under test has the electrical dark spot according to the first image information, the second image information, and the third image information comprises:
acquiring a weak electric property dark spot area in the first image information;
judging whether the intensity of the weak electric property dark spot area changes or not based on the second image information and the third image information;
if so, indicating that the display device to be tested has weak electric property dark spots;
if not, the display device to be tested does not have weak electric property dark spots.
9. The method of claim 1, wherein the display device under test further comprises at least one gray scale detection stage;
in the gray scale detection stage, the display device to be detected is connected to the third voltage; wherein the third voltage is equal to the reference voltage;
acquiring fourth image information of the display device to be tested under the third voltage;
and judging whether the gray scale display of the display device to be tested is normal or not according to the fourth image information.
10. The method of claim 9, wherein the display device under test comprises: a plurality of said gray scale detection stages;
in each gray scale detection stage, the third voltages are the same, and the gray scale number of the image displayed by the display device to be detected is different.
11. The method according to claim 1, wherein the display device under test further comprises at least one transition detection stage;
in the transition detection stage, the display device to be detected is connected to the fourth voltage; wherein the fourth voltage is equal to the reference voltage.
12. The method of claim 11, wherein the display device under test is configured to display white or black in the transition detection phase.
13. An electrical dark spot detection device of a display device, the electrical dark spot detection device comprising:
the device comprises a pre-preparation module, a detection module and a display module, wherein the pre-preparation module is used for selecting a display device to be detected, and the display device to be detected comprises at least one specific detection stage;
the voltage control module is used for respectively connecting the display device to be detected with reference voltage, first voltage and second voltage in the specific detection stage; wherein the first voltage is greater than the reference voltage and greater than the second voltage;
the image acquisition module is used for respectively acquiring first image information of the display device to be detected under the reference voltage, second image information of the display device to be detected under the first voltage and third image information of the display device to be detected under the second voltage;
and the electrical dark spot judging module is used for judging whether the display device to be tested has electrical dark spots or not according to the first image information, the second image information and the third image information.
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