CN110398344B - Method, device and equipment for detecting backlight lamp panel of display equipment and storage medium - Google Patents
Method, device and equipment for detecting backlight lamp panel of display equipment and storage medium Download PDFInfo
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- CN110398344B CN110398344B CN201910787746.4A CN201910787746A CN110398344B CN 110398344 B CN110398344 B CN 110398344B CN 201910787746 A CN201910787746 A CN 201910787746A CN 110398344 B CN110398344 B CN 110398344B
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a method, a device, equipment and a storage medium for detecting a backlight lamp panel of display equipment, wherein the method comprises the steps of firstly obtaining a display area of the backlight lamp panel of the display equipment to be detected, and determining a corresponding light emitting area of each light emitting diode on the display area; then acquiring to-be-detected light-emitting parameters of each light-emitting area; meanwhile, acquiring standard light-emitting parameters of the backlight lamp panel; traversing the to-be-detected light-emitting parameters of each light-emitting region, comparing the traversed current light-emitting parameters with the standard light-emitting parameters, and taking the light-emitting region with the current light-emitting parameters smaller than the standard light-emitting parameters as an abnormal light-emitting region; at the end of the traversal, the position of each abnormal light emitting area in the display area is determined. By the detection scheme, the abnormal light emitting area of the backlight lamp panel of the display equipment can be automatically detected by the detection equipment in the production process of the display equipment, so that the manual complicated detection operation is replaced, and the detection efficiency is improved.
Description
Technical Field
The invention relates to the technical field of televisions, in particular to a method, a device, equipment and a storage medium for detecting a backlight lamp panel of display equipment.
Background
The LED (Light Emitting Diode) backlight panel is an important component forming the backlight of the display equipment, the detection of the high brightness and the low brightness of the LED backlight panel is an important process of the detection of the LED backlight panel, at present, aiming at the detection of the high brightness and the low brightness of the backlight panel, the manual work is adopted to drive the LED panel to Light by connecting the power supply of the backlight panel, the high brightness mode of the backlight panel is manually switched, whether the lightened backlight panel is bad or not is manually observed, the backlight panel is switched to the low brightness mode manually, whether the lightened backlight panel is bad or not is manually observed, the quality of the backlight panel is judged by combining the two detection results, the mode needs to be detected by people, the manual work can cause the damage to the eyesight of staff by the backlight strong Light for a long time, meanwhile, the detection process of the people can be replaced by the product abnormity, the detection is missed or misjudgment due to the eyestrain, secondly, the brightness needs to be manually switched for detection, which affects the efficiency of the test.
Disclosure of Invention
The invention mainly aims to provide a method, a device, equipment and a storage medium for detecting a backlight lamp panel of display equipment, and aims to solve the problems that the process of artificially detecting the backlight lamp panel of a light-emitting diode is complicated at present, and the eyesight health of workers is influenced, so that the efficiency is not high.
In order to achieve the above object, the present invention provides a method for detecting a backlight lamp panel of a display device, the method comprising:
acquiring a display area of a backlight lamp panel of display equipment to be tested;
determining a corresponding light emitting area of each light emitting diode on the display area;
acquiring to-be-detected light-emitting parameters of each light-emitting area;
acquiring standard light-emitting parameters of the backlight panel;
traversing the light-emitting parameters to be detected of each light-emitting region, comparing the traversed current light-emitting parameters with the standard light-emitting parameters, and taking the light-emitting region with the current light-emitting parameters smaller than the standard light-emitting parameters as an abnormal light-emitting region;
and at the end of the traversal, determining the position of each abnormal light-emitting area in the display area.
Preferably, before the step of obtaining the standard lighting parameters of the backlight panel, the method further includes:
calculating the average value of each to-be-detected light-emitting parameter, and taking the average value of each to-be-detected light-emitting parameter as the standard light-emitting parameter of the backlight panel;
and saving the standard light-emitting parameters to a preset storage area.
Preferably, the light-emitting parameter to be detected comprises a light-emitting area, and the light-emitting area is an area of which the brightness value is within a preset value range when the light-emitting diode emits light;
correspondingly, the step of acquiring the light-emitting parameters to be detected of each light-emitting region specifically includes:
measuring the light-emitting area of each light-emitting area respectively to obtain the target area corresponding to each light-emitting area;
correspondingly, the step of calculating the average value of each to-be-detected light-emitting parameter, and using the average value of each to-be-detected light-emitting parameter as the standard light-emitting parameter of the backlight panel specifically includes:
calculating the area average value of each target area, and taking the area average value as the light-emitting area standard of the backlight lamp panel;
correspondingly, the step of traversing the light-emitting parameters to be detected of each light-emitting area, comparing the traversed current light-emitting parameters with the standard light-emitting parameters, and taking the light-emitting area with the current light-emitting parameters smaller than the standard light-emitting parameters as the abnormal light-emitting area specifically comprises the following steps:
traversing the light-emitting area of each light-emitting area, and comparing the traversed current light-emitting area with the light-emitting area standard;
and taking the light emitting area with the current light emitting area smaller than the light emitting area standard as an abnormal light emitting area.
Preferably, the light emission parameter to be detected comprises a gray value;
correspondingly, the step of obtaining the light-emitting parameters to be detected of each light-emitting region further includes:
respectively measuring the gray value of each light-emitting area to obtain a target gray value corresponding to each light-emitting area;
correspondingly, the step of calculating the average value of each to-be-detected light-emitting parameter, and using the average value of each to-be-detected light-emitting parameter as the standard light-emitting parameter of the backlight panel further includes:
calculating the gray average value of each target gray value, and taking the gray average value as the gray standard of the backlight lamp panel;
correspondingly, the step of traversing the light-emitting parameters to be detected of each light-emitting area, comparing the traversed current light-emitting parameters with the standard light-emitting parameters, and taking the light-emitting area with the current light-emitting parameters smaller than the standard light-emitting parameters as an abnormal light-emitting area further comprises:
traversing the target gray values of all the light emitting areas, and comparing the traversed current gray values with the gray standard;
and taking the light emitting area with the current gray value smaller than the gray standard as an abnormal light emitting area.
Preferably, the step of obtaining the display area of the backlight panel of the display device to be tested specifically includes:
acquiring an image of a backlight panel of display equipment to be tested;
filtering the collected lamp panel image;
and acquiring the display area of the backlight panel from the filtered lamp panel image.
Preferably, the step of determining the light emitting area corresponding to each light emitting diode on the display area specifically includes:
acquiring the positions of the light emitting diodes on the display area, and acquiring the middle point of a connecting line between each light emitting diode and the light emitting diode on the peripheral side of the light emitting diode on the display area;
and connecting the middle points to form a region surrounding the light emitting diodes as a light emitting region corresponding to the single light emitting diode on the display region.
Preferably, after the step of calculating the average value of each to-be-detected light-emitting parameter, and using the average value of each to-be-detected light-emitting parameter as the standard light-emitting parameter of the backlight panel, the method further includes:
acquiring an image of a backlight lamp panel of display equipment to be tested, filtering the acquired lamp panel image, and taking the filtered lamp panel image as a lamp panel image to be tested;
acquiring a to-be-detected display area of the backlight lamp panel from the to-be-detected lamp panel image;
acquiring a target light emitting area corresponding to each light emitting diode on the display area to be detected;
correspondingly, the step of obtaining the standard light-emitting parameters of the backlight panel specifically includes:
measuring the light-emitting area of each target light-emitting area respectively to obtain the target area to be detected corresponding to each target light-emitting area; measuring the gray value of each target light-emitting area respectively to obtain a target gray value to be detected corresponding to each target light-emitting area;
correspondingly, the step of traversing the light-emitting parameters to be detected of each light-emitting region, comparing the traversed current light-emitting parameters with the standard light-emitting parameters, and taking the light-emitting region with the current light-emitting parameters smaller than the standard light-emitting parameters as an abnormal light-emitting region specifically comprises the following steps:
traversing the target light-emitting area to be detected of each target light-emitting area, comparing the traversed current light-emitting area to be detected with the light-emitting area standard, and taking the target light-emitting area with the current light-emitting area to be detected smaller than the light-emitting area standard as an abnormal light-emitting area;
and/or traversing the target gray value to be detected of each target light-emitting area, comparing the traversed current gray value to be detected with the gray standard, and taking the target light-emitting area with the current gray value to be detected smaller than the gray standard as an abnormal light-emitting area;
correspondingly, the step of determining the position of each abnormal light emitting region in the display region at the end of traversal specifically includes:
and when the traversal is finished, determining the position of each abnormal light emitting area in the display area to be tested.
In addition, in order to achieve the above object, the present invention further provides a device for detecting a backlight panel of a display device, where the device includes:
the acquisition module is used for acquiring a display area of a backlight lamp panel of the display equipment to be tested;
the determining module is used for determining the corresponding light emitting area of each light emitting diode on the display area;
the detection module is used for acquiring the to-be-detected light-emitting parameters of each light-emitting area;
the acquisition module is used for acquiring standard light-emitting parameters of the backlight panel;
the comparison module is used for traversing the light-emitting parameters to be detected of each light-emitting region, comparing the traversed current light-emitting parameters with the standard light-emitting parameters, and taking the light-emitting region with the current light-emitting parameters smaller than the standard light-emitting parameters as an abnormal light-emitting region;
and the output module is used for determining the position of each abnormal light emitting area in the display area when the traversal is finished.
In addition, in order to achieve the above object, the present invention further provides an apparatus for detecting a backlight panel of a display device, where the apparatus includes a camera, a memory, a processor, and a detection program of the backlight panel of the display device, the detection program being stored in the memory and being executable on the processor, the camera is used to perform image acquisition on the backlight panel of the display device to be detected, and the detection program of the backlight panel of the display device is configured to implement the above steps of the detection method of the backlight panel of the display device.
In addition, in order to achieve the above object, the present invention further provides a storage medium, where a detection program of a backlight panel of a display device is stored, and the detection program of the backlight panel of the display device is configured to implement the steps of the detection method of the backlight panel of the display device described above.
Firstly, acquiring a display area of a backlight panel of display equipment to be tested, and determining a corresponding light emitting area of each light emitting diode on the display area; then acquiring to-be-detected light-emitting parameters of each light-emitting area; meanwhile, acquiring standard light-emitting parameters of the backlight lamp panel; traversing the to-be-detected light-emitting parameters of each light-emitting region, comparing the traversed current light-emitting parameters with the standard light-emitting parameters, and taking the light-emitting region with the current light-emitting parameters smaller than the standard light-emitting parameters as an abnormal light-emitting region; at the end of the traversal, the position of each abnormal light emitting area in the display area is determined. According to the detection scheme provided by the invention, the detection equipment can automatically detect the abnormal light emitting area of the backlight lamp panel of the display equipment in the production process of the display equipment, so that the manual complicated detection operation is replaced, and the detection efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of a detection device of a display device backlight panel in a hardware operating environment according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a method for detecting a backlight panel of a display device according to a first embodiment of the present invention;
fig. 3 is a schematic flowchart of a second embodiment of a method for detecting a backlight panel of a display device according to the present invention;
fig. 4 is a block diagram of a detecting apparatus for a backlight panel of a display device according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a detection device for a backlight panel of a display device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the detection device of the backlight panel of the display device may include: a processor 1001, such as a CPU, a communication bus 1002, a display device backlight board interface 1003, a camera 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The display device backlight panel interface 1003 is used for connecting a backlight panel of the display device; the camera 1004 is used for acquiring images of a backlight lamp panel of the display device to be tested. The display device may include at least a television and a computer monitor.
It will be understood by those skilled in the art that the device configuration shown in fig. 1 does not constitute a limitation of the detection device of the display device backlight panel and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, the memory 1005 may include an operating system, a display device backlight board interface module, and a detection program of a display device backlight board. The device calls a detection program of the backlight panel of the display device stored in the memory 1005 through the processor 1001, and executes the steps of the detection method of the backlight panel of the display device.
The detection device of the embodiment first obtains a display area of a backlight panel of the display device to be detected, and determines a corresponding light emitting area of each light emitting diode on the display area; then acquiring to-be-detected light-emitting parameters of each light-emitting area; meanwhile, acquiring standard light-emitting parameters of the backlight lamp panel; traversing the to-be-detected light-emitting parameters of each light-emitting region, comparing the traversed current light-emitting parameters with the standard light-emitting parameters, and taking the light-emitting region with the current light-emitting parameters smaller than the standard light-emitting parameters as an abnormal light-emitting region; at the end of the traversal, the position of each abnormal light emitting area in the display area is determined. The detection device of the embodiment can be applied to a production line of display equipment, the detection device of the embodiment can replace manual complicated detection operation on the production line, and related workers on the production line can improve the working efficiency by using the detection device of the embodiment without staring at a backlight panel all the time, so that the visual fatigue can be reduced.
Referring to fig. 2, fig. 2 is a schematic flowchart illustrating a method for detecting a backlight panel of a display device according to a first embodiment of the present invention.
Step S10: and acquiring a display area of a backlight panel of the display equipment to be tested.
It should be noted that the main execution body of the method of this embodiment is the processor of the above-mentioned device (i.e., the device for detecting the backlight panel of the display device).
The mode of specifically obtaining the display area of the backlight panel is as follows:
the method comprises the steps of collecting images of a backlight lamp panel of the display equipment to be tested, shooting and sampling the backlight lamp panel of the display equipment to be tested through a camera of the equipment, and naturally, workers can also use a special high-precision camera to shoot the backlight lamp panel;
next, the device performs filtering processing on the collected lamp panel image, specifically adopts image median filtering, and since the median filtering method is very effective in removing salt and pepper noise and has a special effect in the phase analysis processing method of the optical measurement fringe image, the embodiment filters regular noise outside the display area of the image through the image median filtering, and reduces interference of image detection;
then, acquiring a display area of the backlight lamp panel from the filtered lamp panel image based on a gray scale division algorithm; it can be understood that the gray scale division algorithm of the present embodiment divides the gray scale value of the image into a series of intervals specified in advance by the user, and displays different gray scale values within each gray scale interval range as the same value. If the gray values of an image are divided into eight segments, there are eight gray levels on the output image. The output image of which resembles somewhat a contour map. Grayscale segmentation is widely used to display different temperature ranges in thermal infrared images.
The display area and the non-display area of the lamp panel of the display equipment directly have large gray difference, so that the lamp panel image is subjected to gray division according to different gray interval ranges through a gray division algorithm, the display area and the non-display area of the lamp panel image can be divided, and the display area of the backlight lamp panel of the display equipment to be tested is accurately obtained.
Step S20: and determining the corresponding light emitting area of each light emitting diode on the display area.
Specifically, the position of the light emitting diode on the display area is obtained, and the midpoint of a connecting line between each light emitting diode and the light emitting diode on the peripheral side of the light emitting diode is obtained on the display area;
and connecting the middle points to form a region surrounding the light emitting diodes as a light emitting region corresponding to the single light emitting diode on the display region.
When the peripheral side of the light emitting diode has the edge of the display area, the area surrounding the light emitting diode formed by the connecting line of the middle points and the edge is the light emitting area corresponding to the single light emitting diode in the display area. The area of the light emitting area of a single light emitting diode is the ratio of the area of the display area to the number of light emitting diodes.
The light emitting diodes irradiate the display panel, and the output brightness is subjective brightness feeling of human eyes. Because the perception of human to the stimulus of the nature is nonlinear, the external world strengthens the stimulus according to certain proportion, and the stimulus is uniformly increased for human; similarly, human eyes perceive natural brightness non-linearly, so that human eyes perceive subjective brightness and actual objective brightness which are not exactly the same.
Therefore, it should be emphasized that the present embodiment uses "gray scale value" to represent the actual objective brightness of the display device, and uses "brightness value" to represent the subjective brightness perception of human eyes.
It should be noted that, in this embodiment, before image acquisition is performed on the backlight lamp panel of the display device, the input current of the lamp panel is controlled through a serial port command preset in the detection device of the backlight lamp panel of the display device, so that the lamp panel outputs a "high brightness mode" or a "low brightness mode"; from the physical point of view, the larger the current flowing through the backlight panel is, the larger the output brightness value is, that is, the stronger the subjective brightness feeling of human eyes is; on the contrary, if the current flowing through the backlight lamp panel is smaller, the output brightness value is smaller, namely the subjective brightness feeling of naked eyes of people is weaker; because the output brightness value of the backlight panel and the gray value of the backlight panel are in a linear relationship, the gray value of the backlight panel of the display device can be influenced by the intensity of the current, the current of the backlight panel is controlled, and the output brightness value and the gray value of the backlight panel can be better acquired.
Step S30: and acquiring the light-emitting parameters to be detected of each light-emitting area.
In a specific implementation, light emitting areas of different light emitting diodes irradiated on the display area are determined first, and light emitting parameters of the light emitting areas are detected, specifically, the light emitting areas of the light emitting areas and the gray scale values of the light emitting areas are detected. The output brightness value is in direct proportion to the light-emitting area of the light-emitting area, and the larger the output brightness value is, the larger the light-emitting area which is subjectively perceived by human eyes is. And the gray value size of the light-emitting region represents the actual objective brightness of the display device. The size of the light-emitting area is related to the range of the preset value, so the light-emitting area can be larger than the area of the light-emitting area, but in the real detection process, the light-emitting area is generally smaller than or equal to the area of the light-emitting area by setting the range of the preset value of the brightness value.
Step S40: and acquiring standard light-emitting parameters of the backlight panel.
It can be understood that the standard light-emitting parameter is a condition that the light-emitting parameter of each light-emitting region of the backlight panel needs to be satisfied, that is, the standard of the high-low brightness visual detection result of the LED backlight panel, only the light-emitting region that satisfies the condition is normal, and the light-emitting region that does not satisfy the condition is an abnormal light-emitting region of the backlight panel;
specifically, the standard light emitting parameters may be set manually or generated automatically by a computer system.
Preferably, the standard lighting parameter of this embodiment is automatically generated by the detection device in the process of detecting the backlight panel of the display device, for example, and is described as follows:
before the step of obtaining the standard light-emitting parameters of the backlight lamp panel, the detection equipment obtains the average value of each light-emitting parameter to be detected, and the average value of each light-emitting parameter to be detected is used as the standard light-emitting parameters of the backlight lamp panel; and saving the standard light-emitting parameters to a preset storage area.
Specifically, the detection device calculates the light-emitting area of the light-emitting area irradiated by each light-emitting diode on the display area and the gray value of the light-emitting area; and then, the obtained average value of the light-emitting areas on the display area and the average value of the gray values of the light-emitting areas are used for representing the standard light-emitting parameter.
Step S50: traversing the light-emitting parameters to be detected of each light-emitting region, comparing the traversed current light-emitting parameters with the standard light-emitting parameters, and taking the light-emitting region with the current light-emitting parameters smaller than the standard light-emitting parameters as an abnormal light-emitting region;
step S60: and determining the position of each abnormal light-emitting area in the display area at the end of the traversal.
In a specific implementation, the detection device compares the light-emitting area of each light-emitting area with the average value of the light-emitting areas, and screens out abnormal light-emitting areas with areas smaller than the average value of the light-emitting areas; meanwhile, the gray level of each light-emitting area is compared with the average value of the gray levels of the light-emitting areas, and an abnormal light-emitting area with the gray level smaller than the average value of the gray levels is screened out;
if the area is not smaller than the average value of the light-emitting areas, the light-emitting areas work normally, and if the gray scale is larger than the average value of the gray scale values, the light-emitting areas work normally.
Finally, the detection device outputs an abnormal light emitting region having an area smaller than the average value of the light emitting areas and an abnormal light emitting region having a gray level smaller than the average value of the gray levels.
The method includes the steps that firstly, a display area of a backlight panel of display equipment to be tested is obtained, and light emitting areas corresponding to light emitting diodes on the display area are determined; then acquiring to-be-detected light-emitting parameters of each light-emitting area; meanwhile, acquiring standard light-emitting parameters of the backlight lamp panel; traversing the to-be-detected light-emitting parameters of each light-emitting region, comparing the traversed current light-emitting parameters with the standard light-emitting parameters, and taking the light-emitting region with the current light-emitting parameters smaller than the standard light-emitting parameters as an abnormal light-emitting region; at the end of the traversal, the position of each abnormal light emitting area in the display area is determined. The detection scheme of this embodiment can realize that display device is in process of production, and detection device can the abnormal light emitting area of the backlight lamp plate of automated inspection display device, can replace artifical loaded down with trivial details detection operation, has improved detection efficiency.
Further, as shown in fig. 3, a second embodiment of the method for detecting a backlight panel of a display device according to the present invention is provided based on the first embodiment of the method according to the present invention, in the embodiment, the standard light-emitting parameters are automatically generated by a detection device in a process of detecting the backlight panel of the display device, and the light-emitting parameters to be detected are a light-emitting area and a gray-scale value of a light-emitting area:
in this embodiment, first, an image of a backlight panel of a display device to be tested is processed to determine a light emitting region corresponding to each led on the display region, that is, step S10 and step S20 which are the same as those in the first embodiment are first executed, and then step S30 is executed, where step S30 specifically is:
step S30': measuring the light-emitting area of each light-emitting area respectively to obtain the target area corresponding to each light-emitting area; respectively measuring the gray value of each light-emitting area to obtain a target gray value corresponding to each light-emitting area;
further, after step S30', step S40 is executed, where step S40 specifically is:
step S40': calculating the area average value of each target area, and taking the area average value as the light-emitting area standard of the backlight lamp panel; and calculating the gray average value of each target gray value, and taking the gray average value as the gray standard of the backlight lamp panel.
In this embodiment, after step S40', the following steps are executed, specifically:
step S10': acquiring an image of a backlight lamp panel of display equipment to be tested, filtering the acquired lamp panel image, and taking the filtered lamp panel image as a lamp panel image to be tested; acquiring a to-be-detected display area of the backlight lamp panel from the to-be-detected lamp panel image;
specifically, step S10' is characterized in that a process similar to step S10 is executed again, and the display area of the backlight lamp panel is obtained from the filtered lamp panel image based on the gray scale division algorithm.
Step S20': acquiring a target light emitting area corresponding to each light emitting diode on the display area to be detected;
specifically, step S20' is characterized by performing a process similar to that of step S20 again, specifically, obtaining the positions of the leds on the display area, and obtaining the middle point of a connecting line between each led and the led on the periphery of the led on the display area;
and connecting the middle points to form an area surrounding the light emitting diodes as a light emitting area corresponding to the single light emitting diode on the display area.
When the peripheral side of the light emitting diode has the edge of the display area, the area surrounding the light emitting diode formed by the connecting line of the middle points and the edge is the light emitting area corresponding to the single light emitting diode in the display area. The area of the light emitting area of a single light emitting diode is the ratio of the area of the display area to the number of light emitting diodes.
Specifically, the output brightness values of the light emitting diodes in the display area to be detected are measured respectively, and the output brightness value larger than a preset brightness threshold value is used as a corresponding light emitting area of a single light emitting diode in the display area to be detected;
step S30 ″: measuring the light-emitting area of each target light-emitting area respectively to obtain the target area to be detected corresponding to each target light-emitting area; measuring the gray value of each target light-emitting area respectively to obtain a target gray value to be detected corresponding to each target light-emitting area;
after the steps S10' to S30 ″ are completed, step S50 is executed, in this embodiment, the step S50 specifically is:
step S50': traversing the target light-emitting area to be detected of each target light-emitting area, comparing the traversed current light-emitting area to be detected with the light-emitting area standard, and taking the target light-emitting area with the current light-emitting area to be detected smaller than the light-emitting area standard as an abnormal light-emitting area;
traversing the target gray-scale value to be detected of each target light-emitting area, comparing the traversed current gray-scale value to be detected with the gray standard, and taking the target light-emitting area with the current gray-scale value to be detected smaller than the gray standard as an abnormal light-emitting area.
Finally, the step S60 is executed, in this embodiment, the step S60 specifically includes:
s60': and when the traversal is finished, determining the position of each abnormal light emitting area in the display area to be tested.
It can be understood that, in this embodiment, two image processing operations are performed on the backlight panel of the display device to be tested, where the first image processing stage is used to automatically generate a standard for measuring the visual detection result of the high and low brightness of the backlight panel, that is, after the light emitting areas corresponding to the light emitting diodes on the display area are determined, the light emitting areas and the gray scale values of the light emitting areas are immediately obtained, and then the light emitting area standard is generated according to the obtained light emitting areas and the gray scale standard is generated according to the obtained gray scale values;
the second image processing stage is used for detecting the abnormal light emitting area, namely, the backlight lamp panel of the display device to be detected is subjected to image acquisition again to obtain the current light emitting area to be detected and the current gray value to be detected of each target light emitting area, and the current light emitting area to be detected and the current gray value to be detected are compared with the standard average value (light emitting area standard and gray standard) generated in the first image processing stage, so that the abnormal light emitting area of the LED backlight lamp panel can be accurately detected.
Further, the present invention also provides an embodiment of a device for detecting a backlight panel of a display device, and referring to fig. 4, fig. 4 is a block diagram of a structure of an embodiment of a device for detecting a backlight panel of a display device of a backlight panel of a display device according to the present invention.
As shown in fig. 4, a device for presenting a test case according to an embodiment of the present invention includes: the device comprises an acquisition module 10, a determination module 20, a detection module 30, an acquisition module 40, a comparison module 50 and an output module 60;
in this embodiment, the detection device of the backlight panel of the display device may be deployed in the detection device, and the detection device may also represent a detection program of the backlight panel of the display device; wherein:
the acquisition module 10 is used for acquiring a display area of a backlight panel of the display device to be tested;
specifically, a backlight lamp panel of the display equipment to be tested is shot and sampled through a camera of the equipment.
A determining module 20, configured to determine a corresponding light-emitting area of each light-emitting diode on the display area;
specifically, regular noise outside a display area of an image can be filtered through image median filtering, so that the interference of image detection is reduced; and then acquiring the display area of the backlight lamp panel from the filtered lamp panel image based on a gray scale division algorithm.
The detection module 30 is used for acquiring the to-be-detected light-emitting parameters of each light-emitting area;
specifically, a light emitting area of the light emitting diode, which is irradiated on the display area, is determined, and light emitting parameters of the light emitting area are detected, specifically, the size of the light emitting area and the size of the gray scale value of the light emitting area are detected.
The obtaining module 40 is used for obtaining standard light-emitting parameters of the backlight panel;
specifically, the light-emitting area of a light-emitting region irradiated by each light-emitting diode on the display region and the gray value of the light-emitting region are calculated; and then, the obtained average value of the light-emitting areas on the display area and the average value of the gray values of the light-emitting areas are used for representing the standard light-emitting parameter.
The comparison module 50 is configured to traverse the to-be-detected light-emitting parameters of each light-emitting region, compare the traversed current light-emitting parameters with the standard light-emitting parameters, and take the light-emitting region with the current light-emitting parameters smaller than the standard light-emitting parameters as an abnormal light-emitting region;
specifically, the light-emitting area of each light-emitting area is compared with the average value of the light-emitting areas, and an abnormal light-emitting area with the area smaller than the average value of the light-emitting areas is screened out; meanwhile, the gray level of each light-emitting area is compared with the average value of the gray levels of the light-emitting areas, and an abnormal light-emitting area with the gray level smaller than the average value of the gray levels is screened out;
if the area is not smaller than the average value of the light-emitting areas, the light-emitting areas work normally, and if the gray scale is larger than the average value of the gray scale values, the light-emitting areas work normally.
An output module 60, configured to determine, when traversal is finished, positions of the abnormal light emitting areas in the display area; namely, an abnormal light emitting region having an output area smaller than the average value of the light emitting areas and an abnormal light emitting region having a gradation smaller than the average value of the gradation values.
The above embodiments of the method for detecting a backlight panel of a display device are described in detail in the specific implementation of the apparatus for detecting a backlight panel of a display device of this embodiment, and are not described in detail in this embodiment.
Further, the present invention also provides a storage medium, where the storage medium is a computer-readable storage medium, where a detection program of a backlight panel of a display device is stored on the computer-readable storage medium, and the detection program of the backlight panel of the display device is configured to implement the steps of the detection method of the backlight panel of the display device described above.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A method for detecting a backlight panel of display equipment is characterized by comprising the following steps:
acquiring a display area of a backlight lamp panel of display equipment to be tested;
determining a corresponding light emitting area of each light emitting diode on the display area;
acquiring to-be-detected light-emitting parameters of each light-emitting area;
acquiring standard light-emitting parameters of the backlight panel;
traversing the light-emitting parameters to be detected of each light-emitting region, comparing the traversed current light-emitting parameters with the standard light-emitting parameters, and taking the light-emitting region with the current light-emitting parameters smaller than the standard light-emitting parameters as an abnormal light-emitting region;
when the traversal is finished, determining the position of each abnormal light emitting area in the display area;
the light-emitting parameters to be detected comprise light-emitting areas, the light-emitting areas are areas with brightness values within a preset value range when the light-emitting diodes emit light, and the standard light-emitting parameters comprise light-emitting area standards;
correspondingly, the step of acquiring the light-emitting parameters to be detected of each light-emitting region specifically includes:
measuring the light-emitting area of each light-emitting area respectively to obtain the target area corresponding to each light-emitting area;
the step of traversing the light-emitting parameters to be detected of each light-emitting area, comparing the traversed current light-emitting parameters with the standard light-emitting parameters, and taking the light-emitting area with the current light-emitting parameters smaller than the standard light-emitting parameters as an abnormal light-emitting area specifically comprises the following steps:
traversing the light-emitting area of each light-emitting area, and comparing the traversed current light-emitting area with the light-emitting area standard;
and taking the light emitting area with the current light emitting area smaller than the light emitting area standard as an abnormal light emitting area.
2. The method of claim 1, wherein the step of obtaining the standard lighting parameters of the backlight panel is preceded by the method further comprising:
calculating the average value of each to-be-detected light-emitting parameter, and taking the average value of each to-be-detected light-emitting parameter as the standard light-emitting parameter of the backlight panel;
storing the standard light-emitting parameters to a preset storage area;
the step of calculating the average value of each to-be-detected light-emitting parameter, and using the average value of each to-be-detected light-emitting parameter as the standard light-emitting parameter of the backlight panel specifically includes:
and calculating the area average value of each target area, and taking the area average value as the light-emitting area standard of the backlight lamp panel.
3. The method of claim 2, wherein the luminescence parameters to be detected comprise gray scale values;
correspondingly, the step of obtaining the light-emitting parameters to be detected of each light-emitting region further includes:
respectively measuring the gray value of each light-emitting area to obtain a target gray value corresponding to each light-emitting area;
correspondingly, the step of calculating the average value of each to-be-detected light-emitting parameter, and using the average value of each to-be-detected light-emitting parameter as the standard light-emitting parameter of the backlight panel further includes:
calculating the gray average value of each target gray value, and taking the gray average value as the gray standard of the backlight panel;
correspondingly, the step of traversing the light-emitting parameters to be detected of each light-emitting region, comparing the traversed current light-emitting parameters with the standard light-emitting parameters, and taking the light-emitting region with the current light-emitting parameters smaller than the standard light-emitting parameters as an abnormal light-emitting region further includes:
traversing the target gray value of each light-emitting region, and comparing the traversed current gray value with the gray standard;
and taking the light emitting area with the current gray value smaller than the gray standard as an abnormal light emitting area.
4. The method according to any one of claims 1 to 3, wherein the step of obtaining the display area of the backlight panel of the display device under test specifically comprises:
acquiring an image of a backlight lamp panel of display equipment to be tested;
filtering the collected lamp panel image;
and acquiring the display area of the backlight panel from the filtered lamp panel image.
5. The method according to any one of claims 1 to 3, wherein the step of determining the corresponding light emitting area of each light emitting diode on the display area specifically comprises:
acquiring the positions of the light emitting diodes on the display area, and acquiring the midpoint of a connecting line between each light emitting diode and the light emitting diode on the peripheral side of the light emitting diode on the display area;
and connecting the middle points to form a region surrounding the light emitting diodes as a light emitting region corresponding to the single light emitting diode on the display region.
6. The method of claim 2, wherein the lighting parameters include lighting area and gray scale value;
correspondingly, after the step of calculating the average value of each to-be-detected light-emitting parameter and using the average value of each to-be-detected light-emitting parameter as the standard light-emitting parameter of the backlight panel, the method further comprises the following steps:
acquiring an image of a backlight lamp panel of display equipment to be tested, filtering the acquired lamp panel image, and taking the filtered lamp panel image as a lamp panel image to be tested;
acquiring a to-be-detected display area of the backlight lamp panel from the to-be-detected lamp panel image;
acquiring a target light emitting area corresponding to each light emitting diode on the display area to be detected;
correspondingly, the step of obtaining the standard light-emitting parameters of the backlight panel specifically includes:
measuring the light-emitting area of each target light-emitting area respectively to obtain the target area to be detected corresponding to each target light-emitting area; measuring the gray value of each target light-emitting area respectively to obtain a target gray value to be detected corresponding to each target light-emitting area;
correspondingly, the step of traversing the light-emitting parameters to be detected of each light-emitting area, comparing the traversed current light-emitting parameters with the standard light-emitting parameters, and taking the light-emitting area with the current light-emitting parameters smaller than the standard light-emitting parameters as the abnormal light-emitting area specifically comprises the following steps:
traversing the target light-emitting area to be detected of each target light-emitting area, comparing the traversed current light-emitting area to be detected with the light-emitting area standard, and taking the target light-emitting area with the current light-emitting area to be detected smaller than the light-emitting area standard as an abnormal light-emitting area;
and/or traversing the target gray value to be detected of each target light-emitting area, comparing the traversed current gray value to be detected with a gray standard, and taking the target light-emitting area with the current gray value to be detected smaller than the gray standard as an abnormal light-emitting area;
correspondingly, the step of determining the position of each abnormal light emitting region in the display region at the end of traversal specifically includes:
and when the traversal is finished, determining the position of each abnormal light emitting area in the display area to be tested.
7. The utility model provides a detection apparatus for display device backlight plate, its characterized in that, the device includes:
the acquisition module is used for acquiring a display area of a backlight lamp panel of the display equipment to be tested;
the determining module is used for determining the corresponding light emitting area of each light emitting diode on the display area;
the detection module is used for acquiring to-be-detected light-emitting parameters of each light-emitting area;
the acquisition module is used for acquiring standard light-emitting parameters of the backlight panel;
the comparison module is used for traversing the light-emitting parameters to be detected of each light-emitting region, comparing the traversed current light-emitting parameters with the standard light-emitting parameters, and taking the light-emitting region with the current light-emitting parameters smaller than the standard light-emitting parameters as an abnormal light-emitting region;
the output module is used for determining the positions of the abnormal light emitting areas in the display area when the traversal is finished;
the to-be-detected light-emitting parameters comprise light-emitting areas, the light-emitting areas are areas with brightness values within a preset value range when the light-emitting diodes emit light, and the standard light-emitting parameters comprise light-emitting area standards;
correspondingly, the detection module is further configured to measure the light-emitting areas of the light-emitting areas respectively to obtain target areas corresponding to the light-emitting areas;
the comparison module is also used for traversing the light-emitting areas of the light-emitting areas and comparing the traversed current light-emitting area with the light-emitting area standard; and taking the light emitting area with the current light emitting area smaller than the light emitting area standard as an abnormal light emitting area.
8. An apparatus for detecting a backlight panel of a display device, the apparatus comprising a camera, a memory, a processor, and a detection program of the backlight panel of the display device stored in the memory and capable of running on the processor, the camera being configured to perform image acquisition on the backlight panel of the display device to be detected, the detection program of the backlight panel of the display device being configured to implement the steps of the detection method of the backlight panel of the display device according to any one of claims 1 to 6.
9. A storage medium, wherein a detection program of a backlight panel of a display device is stored on the storage medium, and the detection program of the backlight panel of the display device is configured to implement the steps of the detection method of the backlight panel of the display device according to any one of claims 1 to 6.
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| CN113884849B (en) * | 2020-06-17 | 2023-06-20 | Tcl科技集团股份有限公司 | Method and device for testing light-emitting diode device |
| CN112097914A (en) * | 2020-09-01 | 2020-12-18 | 湖南格兰博智能科技有限责任公司 | Self-checking method and system of infrared thermometer and infrared thermometer |
| WO2023161975A1 (en) * | 2022-02-22 | 2023-08-31 | 株式会社ソシオネクスト | Image display control device, image display system, and image display control method |
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