CN114279683A - Automatic detection platform for display screen, method thereof and LED display screen - Google Patents
Automatic detection platform for display screen, method thereof and LED display screen Download PDFInfo
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Abstract
The invention relates to an automatic detection platform for a display screen, a method thereof and an LED display screen, which can truly realize full-automatic detection so as to save labor and improve detection efficiency. The automatic detection platform for the display screen comprises an industrial personal computer, and a monitoring mechanism and a moving mechanism which are communicably connected with the industrial personal computer. The industrial personal computer is used for being connected with the dot matrix display screen in a communication mode so as to control the display screen box body of the dot matrix display screen to be sequentially lighted in a partitioning mode. The monitoring mechanism is controlled by the industrial personal computer and is used for collecting images of the display screen box body. The monitoring mechanism is arranged on the moving mechanism, the moving mechanism is controlled by the industrial personal computer and is used for moving the monitoring mechanism to a position corresponding to the display screen box which is lighted in a subarea mode, and the industrial personal computer is used for controlling the monitoring mechanism to collect images of the display screen box which is lighted in the subarea mode so as to analyze and process the images and obtain the defect types and positions of the dot matrix display screen.
Description
Technical Field
The invention relates to the technical field of automatic detection, in particular to an automatic detection platform for a display screen, a method thereof and an LED display screen.
Background
Dot matrix display screens such as LED display screens or OLED display screens need to be subjected to defect detection before leaving a factory, and bad lamp beads are marked and recorded by manual inspection generally at present so as to carry out unified maintenance. However, the manual inspection mode is low in efficiency, and the eyes are easy to fatigue and easy to miss inspection. Especially, as the requirement of people on vision is improved, the resolution of the display screen is increased, and for the dot matrix display screen, the dot spacing between the lamp beads is decreased, which brings great challenge to the manual inspection. Taking an LED display screen with a resolution of 1920 × 1080 as an example, the LED display screen will have 200 thousands of LED beads, which makes the manual inspection method extremely difficult, even difficult to implement.
At present, there is no automatic detection system and method for dot matrix display screen in the industry, and although there are some automatic detection methods in the field of liquid crystal display, it is not suitable for automatic detection of dot matrix display screen. For example, although the technical solution disclosed in chinese patent application CN105784723A performs automatic detection by fixing the camera and moving the detection panel, the image captured by the camera has no obvious boundary, so that the technical solution can only determine whether a certain captured image has a defect, but cannot accurately locate the specific coordinate of the defect in the image, and thus, only the post-processing can be performed manually. In other words, the technical solution cannot accurately locate the defect position, and therefore the defect position has to be located manually, which is typical of semi-automatic detection.
Disclosure of Invention
An advantage of the present invention is to provide an automated inspection platform for a display screen, a method thereof, and an LED display screen, which can truly realize full-automatic inspection, so as to save labor and improve inspection efficiency.
Another advantage of the present invention is to provide an automatic detection platform for a display screen, a method thereof, and an LED display screen, wherein in an embodiment of the present invention, the automatic detection platform for a display screen can perform aging detection and defect location on a dot matrix display screen fully automatically, which is convenient to completely release human labor and improve detection efficiency.
Another advantage of the present invention is to provide an automatic detection platform for a display screen, a method thereof, and an LED display screen, wherein in an embodiment of the present invention, the automatic detection platform for a display screen can effectively improve a defect detection rate, especially a detection rate and an aging efficiency of a hidden defect problem such as a PCB micro-open circuit, thereby subverting a conventional manual inspection method, facilitating a reduction in labor cost, and effectively reducing a product after-sale maintenance cost.
Another advantage of the present invention is to provide an automated inspection platform for a display screen, a method thereof, and an LED display screen, wherein in an embodiment of the present invention, the automated inspection platform for a display screen can automatically intercept an image in a partition lighting manner, so that all lamp bead pixels in the intercepted image directly correspond to lamp bead coordinates, which facilitates subsequent defect coordinate positioning and is helpful to improve defect positioning accuracy.
Another advantage of the present invention is to provide an automated inspection platform for a display screen, a method thereof, and an LED display screen, wherein in an embodiment of the present invention, the automated inspection platform for a display screen can perform defect analysis through a deep learning algorithm, so as to effectively improve a defect detection rate.
Another advantage of the present invention is to provide an automatic detection platform for a display screen, a method thereof, and an LED display screen, wherein in an embodiment of the present invention, the automatic detection platform for a display screen can perform secondary analysis only on an abnormal lamp panel image screened by primary analysis, which is helpful to reduce the amount of computation and improve the detection efficiency.
Another advantage of the present invention is to provide an automatic detection platform for a display screen, a method thereof, and an LED display screen, wherein in an embodiment of the present invention, the automatic detection platform for a display screen can automatically inspect the entire display screen, so as to avoid the problem of missed detection in a single capture, which is helpful to improve the detection accuracy.
Another advantage of the present invention is to provide an automated inspection platform for a display screen, a method thereof and an LED display screen, wherein expensive materials or complex structures are not required in the present invention in order to achieve the above objects. Therefore, the invention successfully and effectively provides a solution, not only provides a simple automatic detection platform for the display screen and a method thereof, and an LED display screen, but also increases the practicability and reliability of the automatic detection platform for the display screen and the method thereof, and the LED display screen.
To achieve at least one of the above advantages or other advantages and objectives of the present invention, the present invention provides an automatic detection platform for a display screen, for detecting aging defects of a dot matrix display screen, the automatic detection platform for a display screen comprising:
the industrial personal computer is used for being connected with the dot matrix display screen in a communication way so as to control the display screen box body of the dot matrix display screen to be sequentially lighted in a partition way;
the monitoring mechanism is connected with the industrial personal computer in a communication mode and is controlled by the industrial personal computer and used for acquiring images of the display screen box body; and
and the moving mechanism is controlled by the industrial personal computer and is used for moving the monitoring mechanism to a position corresponding to the display screen box which is lighted in a subarea manner, and the industrial personal computer is used for controlling the monitoring mechanism to collect the image of the display screen box which is lighted in the subarea manner so as to analyze and process the image and obtain the defect type and the defect position of the dot matrix display screen.
According to one embodiment of the application, the moving mechanism comprises a guide rail, a support and a driving device, and the monitoring mechanism is arranged on the support, wherein the driving device is arranged between the guide rail and the support, and the driving device is used for driving the support to move along the guide rail under the control of the industrial personal computer so as to drive the monitoring mechanism to move to a position corresponding to the display screen box which is lighted by the subareas.
According to one embodiment of the application, the monitoring mechanism comprises a plurality of industrial cameras, and the industrial cameras are arranged at intervals on the support and used for synchronously monitoring different display screen boxes.
According to one embodiment of the application, the imaging precision of each industrial camera is higher than the point distance of lamp beads in the display screen box, and the view field of each industrial camera at least covers one display screen box.
According to an embodiment of the application, the industrial camera is used for carrying out primary processing to the box image of gathering to the interception is screened out unusual lamp plate image and is preserved extremely the industrial computer.
According to one embodiment of the application, the industrial personal computer is used for controlling one partition lamp panel in the display screen box body of the dot matrix display screen to be lightened so as to display different colors in sequence, and other partition lamp panels are extinguished; or the industrial personal computer is used for controlling a plurality of subarea lamp panels in the display screen box body of the dot matrix display screen to be lightened simultaneously and respectively display different colors.
According to another aspect of the present application, the present application further provides an automatic detection method for a display screen, including the steps of:
moving the monitoring mechanism to a position corresponding to a current display screen box body of the dot matrix display screen;
controlling a plurality of subarea lamp panels of the current display screen box body to be lighted in subareas;
controlling the monitoring mechanism to synchronously acquire the image of the current display screen box body for preliminary processing so as to obtain an abnormal lamp panel image, numbering and storing;
moving the monitoring mechanism to a position corresponding to a next display screen box body of the dot matrix display screen so as to repeat the operations of subarea lighting and preliminary treatment; and
and calling a deep learning model to reprocess all the saved abnormal lamp panel images so as to obtain the defect types and the defect lamp point coordinates of the dot matrix display screen.
According to an embodiment of the present application, the step of controlling the plurality of partitioned lamp panels of the current display screen box to be lighted in a partitioned manner includes the steps of:
controlling the current display screen box body to perform partition division so as to obtain a plurality of partition lamp panels distributed in an array; and
controlling any partition lamp panel in the current display screen box body to be lightened, and displaying the color to be monitored; and
and controlling other partition lamp panels in the current display screen box body to be synchronously extinguished or controlling other partition lamp panels in the current display screen box body to be synchronously lightened so that all the partition lamp panels in the current display screen box body respectively display different colors.
According to an embodiment of the application, control this monitoring mechanism and gather the image of this current display screen box in step and carry out preliminary treatment to obtain unusual lamp plate image and carry out the step that the serial number was saved, include the step:
controlling a working camera of the monitoring mechanism to shoot the current display screen box body so as to obtain a box body image corresponding to the current display screen box body;
controlling the working camera to intercept the subarea lamp panel images which correspond to the subarea lamp panels of the current display screen box body one by one from the box body image according to the light and shade boundary or the color boundary so as to carry out numbering;
controlling the working camera to perform preliminary analysis on the numbered subarea lamp panel images so as to judge whether the color values of all lamp bead pixels in each subarea lamp panel image are consistent;
in response to the fact that color values of all lamp bead pixels in the current partition lamp panel image are completely consistent, controlling the working camera to discard the current partition lamp panel image; and
and responding to the incomplete consistency of the color values of all lamp bead pixels in the current subarea lamp panel image, and controlling the working camera to transmit the current subarea lamp panel image to be saved as the abnormal lamp panel image.
According to an embodiment of the application, the step of calling the deep learning model to reprocess all the saved abnormal lamp panel images to obtain the defect types and the defect coordinates of the dot matrix display screen includes the steps of:
calling the trained deep learning model to perform secondary analysis on the stored abnormal lamp panel image so as to analyze the defect type and the defect position of the partitioned lamp panel corresponding to the abnormal lamp panel image; and
the defect coordinates are identified in the abnormal lamp panel image to be recorded in a detection log.
According to another aspect of the application, the application further provides an LED display screen, and the LED display screen adopts any one of the automatic detection methods for the display screen to detect.
In summary, according to the automatic detection platform for the display screen and the method thereof, full-automatic aging defect detection can be realized through linkage among the industrial personal computer, the dot matrix display screen, the moving mechanism and the industrial camera, manual labor is thoroughly liberated, detection efficiency is improved, the defect position is accurately positioned, and the missing detection probability of the lamp bead problem in the dot matrix display screen such as an LED display screen or an OLED display screen and the stealth defects such as PCB micro-open circuit is effectively reduced.
Drawings
FIG. 1 is a block diagram schematic diagram of an automated inspection platform for display screens according to one embodiment of the present application;
FIG. 2 is a schematic structural diagram of the automated inspection platform for display screen according to the above embodiment of the present application;
FIG. 3 is a schematic flow chart of an automated inspection method for a display screen according to an embodiment of the present application;
FIG. 4 is a flowchart illustrating a step of lighting the sub-areas in the automatic detection method for a display screen according to the above embodiment of the present application;
FIG. 5 is a schematic flow chart illustrating the preliminary processing steps in the automatic detection method for display screen according to the above embodiment of the present application;
FIG. 6 is a flow chart showing the steps of reprocessing in the automatic inspection method for display screen according to the above-described embodiment of the present application;
FIGS. 7 and 8 are schematic flow diagrams of a method for linked capture of display screen images according to one embodiment of the present application;
FIG. 9 is a flow diagram illustrating a method for preliminary processing an image according to one embodiment of the present application.
Description of the main element symbols: 10. the display screen is used for an automatic detection platform; 11. an industrial personal computer; 12. a moving mechanism; 121. a guide rail; 122. a support; 123. a drive device; 13. a monitoring mechanism; 130. an industrial camera; 20. a dot matrix display screen; 21. a display screen box body; 210. subregion lamp plate.
The present application will be described in further detail with reference to the drawings and the detailed description.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.
In the present invention, the terms "a" and "an" in the claims and the description should be understood as meaning "one or more", that is, one element may be one in number in one embodiment, and the element may be more than one in number in another embodiment. The terms "a" and "an" should not be construed as limiting the number unless the number of such elements is explicitly recited as one in the present disclosure, but rather the terms "a" and "an" should not be construed as being limited to only one of the number.
In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The display screen needs to be subjected to defect detection before leaving a factory, the defects are marked and recorded by manual inspection, but the detection mode is low in efficiency and prone to fatigue. Particularly, for dot matrix display screens such as LED display screens or OLED display screens, the number of lamp beads in the dot matrix display screens is increased sharply along with the increase of the resolution of the display screens, and once the lamp panel has a hidden circuit problem, adverse phenomena such as crosstalk, color blocks and the like can randomly occur in the defect detection process and cannot be maintained for a long time, so that the phenomena that naked eyes are not easy to find during manual inspection and detection is easy to miss are caused; meanwhile, the labor cost is increasing day by day, and the manual inspection mode can cause higher production and manufacturing cost. Even though a machine detection method applied to the field of liquid crystal display appears in the prior art, the method still belongs to a semi-automatic mode, and the defect position auxiliary positioning is required to be manually carried out in the detection process.
In order to solve the above problem, referring to fig. 1 and fig. 2 of the drawings of the present application, according to an embodiment of the present application, an automated inspection platform 10 for a display screen is provided for detecting aging defects of an array display screen 20, wherein the automated inspection platform 10 for a display screen may include an industrial personal computer 11, a moving mechanism 12, and a monitoring mechanism 13. The industrial personal computer 11 is communicably connected to the dot matrix display screen 20 to control the display screen box 21 of the dot matrix display screen 20 to sequentially perform the partition lighting. The monitoring mechanism 13 is correspondingly disposed on the moving mechanism 12, wherein the moving mechanism 12 is communicably connected to the industrial personal computer 11, and the industrial personal computer 11 is configured to control the moving mechanism 12 to move the monitoring mechanism 13 to a position corresponding to the display screen box 21 that is lit up in a divisional manner. The monitoring mechanism 13 is communicably connected to the industrial personal computer 11, and the industrial personal computer 11 is configured to control the monitoring mechanism 13 to collect an image of the display screen box 21 lighted in a partitioned manner, so as to perform image analysis processing to obtain a defect type and a defect position of the dot matrix display screen 20, thereby implementing full-automatic aging defect detection.
It should be noted that, the present application does not limit the sequence of the partition lighting and the position moving, for example, in an example of the present application, the industrial personal computer 11 of the present application may first control one or more display screen boxes 21 in the dot matrix display screen 20 to perform the partition lighting, and then control the moving mechanism 12 to move the monitoring mechanism 13 to the position corresponding to the display screen boxes 21, so as to control the monitoring mechanism 13 to perform the image acquisition; or, in another example of this application, the industrial personal computer 11 of this application may control first the moving mechanism 12 will the monitoring mechanism 13 moves to the position corresponding to one or more display screen boxes 21 in the dot matrix display screen 20, and then control these display screen boxes 21 to perform the partition lighting, and then control the monitoring mechanism 13 to perform the image acquisition. It can be understood that, although the moving mechanism 12 of the present application moves the monitoring mechanism 13 to make the monitoring mechanisms 13 respectively correspond to different display screen boxes 21 on the dot matrix display screen 20, in other examples of the present application, the moving mechanism 12 may also move the dot matrix display screen 20 to make the monitoring mechanisms 13 respectively correspond to different display screen boxes 21 on the dot matrix display screen 20, which is not described in detail in this application.
In addition, the dot matrix display screen 20 of the present application may be implemented as, but not limited to, an LED display screen or an OLED display screen, and in other examples of the present application, the dot matrix display screen 20 may also be implemented as other display screens having a dot light emitting array, which is not described herein again. The dot matrix display 20 is generally formed by arranging a plurality of display box bodies 21 in an array, and different display box bodies 21 can be connected through a network cable. The present application is directed to each display area of the display screen box 21 is partitioned to obtain a plurality of partitioned lamp panels 210 that can be lighted by partitions. In other words, as shown in fig. 2, each of the display screen boxes 21 of the present application may include a plurality of partitioned lamp panels 210 to be lighted in a partitioned manner under the control of the industrial personal computer 11.
Preferably, each of the partition lamp panels 210 of the display screen box 21 may correspond to an independent lamp panel in the display screen box 21, so that a subsequent maintenance engineer can quickly find a lamp panel with a defect according to the detection log to perform maintenance processing. Of course, in other examples of the present application, each of the partition lamp panels 210 of the display screen box 21 may also correspond to a partial area of an independent lamp panel in the display screen box 21; or each of the partition lamp panels 210 of the display screen box 21 may also correspond to a plurality of independent lamp panels in the display screen box 21. It can be understood that, although each of the display screen box bodies 21 may generally include one or more independent lamp panels, the boundary of the independent lamp panels in the display screen box body 21 may be partitioned, or the boundary may be partitioned according to an area or other factors, which is not described herein again.
More preferably, the industrial computer 11 is used for controlling each of the plurality of the partition lamp panels 210 in the display screen box 21 are distributed in an array, so that the partition lamp panel images are not only conveniently numbered, but also the display screen box 21 is prevented from being positioned differently when the display screen box 21 is lighted by partitions at the same time, and the display screen box 21 is prevented from interfering with each other between the partition lamp panels 210
It is worth noting that the automatic detection platform 10 for the display screen can clearly identify each image boundary of the partition lamp panel 210 by lighting each display screen box body 21 in a partition mode, so that the partition lamp panel images corresponding to the partition lamp panel 210 one to one can be intercepted from the collected box body images, the problem of missed detection can be avoided, and the defect positioning is facilitated.
Illustratively, as shown in fig. 2, the moving mechanism 12 in the automated inspection platform 10 for display screen may include, but is not limited to, a guide rail 121, a bracket 122, and a driving device 123, wherein the driving device 123 is disposed between the guide rail 121 and the bracket 122, and the driving device 123 is configured to drive the bracket 122 to move along the guide rail 121 under the control of the industrial personal computer 11. Meanwhile, the monitoring mechanism 13 is disposed on the bracket 122 of the moving mechanism 12, so that the bracket 122 drives the monitoring mechanism 13 to move to a position to be monitored, such as a position corresponding to the display screen box 21 that is lighted by sections. It is understood that the driving device 123 of the moving mechanism 12 can be, but is not limited to be, implemented as a rail robot to walk along the guide rail 121 to drive the support 122 to move along the guide rail 121.
In addition, the monitoring mechanism 13 in the automated inspection platform for display screen 10 may include, but is not limited to, a plurality of industrial cameras 130, and the plurality of industrial cameras 130 are spaced apart from each other and disposed on the bracket 122 for monitoring different display screen boxes 21 simultaneously. It is understood that, in other examples of the present application, the monitoring mechanism 13 may also include only one industrial camera 130, and at this time, the guide rail 121 of the moving mechanism 12 is implemented as a two-dimensional guide rail, which can still achieve the effect of automatic detection, and the description of the present application is omitted.
Optionally, the driving device 123 is mounted on the guide rail 121 to receive a control command sent by the industrial personal computer 11 to realize left-right sliding; the industrial camera 130 is mounted to the driving device 123 through the bracket 122 to move in accordance with the movement of the driving device 123. The guide rail 121 can supply power to the industrial camera 130 through the power carrier module and provide a network signal, so that the driving device 123 drives the industrial camera 130 to generate displacement after receiving a control command so as to acquire and obtain image data of the display screen box 21 at different positions.
Preferably, the guide rail 121 of the moving mechanism 12 may be implemented as a linear guide rail extending laterally to correspond to each row of the display screen housing 21 of the dot matrix display screen 20; a plurality of the industrial cameras 130 are longitudinally distributed on the support 122 to correspond to each column of the display screen box 21 of the dot matrix display screen 20. Thus, when the driving device 123 drives the bracket 122 to move along the guide rail 121, the plurality of industrial cameras 130 are driven to sequentially move to positions corresponding to the entire row of the display screen boxes 21, so as to simultaneously detect defects of the entire row of the display screen boxes 21.
It is worth noting that, what this application adopted the imaging precision of industry camera 130 need be higher than dot matrix display screen 20 the point interval of lamp pearl in the display screen box 21 to guarantee industry camera 130 can catch clearly every the state of lamp pearl. For example, the automated display screen inspection platform 10 of the present application may include six 1200W industrial cameras 130 to support defect inspection of six display screen boxes 21 simultaneously. The distance between the industrial camera 130 and the dot matrix display 20 is controlled to be 1600mm, and the industrial camera 130 adopts a 35mm industrial lens, so that the field of view of each industrial camera 130 can cover the range of a single 600mm 337.5mm display box 21. The imaging precision of the industrial camera 130 is 0.158mm/pixel, so as to meet the detection requirements of the dot matrix display screen 20 with the same dot spacing of P0.9375mm, P1.25mm and P1.5625mm at present.
It can be understood that the field of view of each industrial camera 130 in the present application may be, but is not limited to, only cover a range of one display screen box 21, for example, in other examples in the present application, the field of view of one industrial camera 130 may also cover two or more display screen boxes 21 at the same time, and still can intercept a required partitioned lamp panel image from a box image to implement automatic detection, which is not described herein again.
According to the above embodiments of the present application, the industrial camera 130 of the present application can receive control information such as a moving distance, a capturing frequency, and a capturing time, so as to realize the linked capturing of the dot matrix display 20. In addition, this application automatic testing platform 10 for display screen can adopt the method that machine vision and deep learning algorithm combined together right the whole screen defect of dot matrix display screen is gathered, is analyzed and is marked, not only can promote defect relevance ratio effectively, especially stealthy bad relevance ratio and ageing efficiency such as PCB micro-break circuit, but also makes things convenient for maintenance engineer to carry out maintenance according to the defect type and the position of mark.
Specifically, as shown in fig. 2, in the automatic detection platform 10 for a display screen of the present application, the industrial personal computer 11 may be but not limited to interact with the industrial camera 130, the driving device 123 and the dot matrix display screen 20 in a network and serial port manner, wherein the industrial personal computer 11 is configured to control the industrial camera 130, the driving device 123 and the dot matrix display screen 20, and the industrial personal computer 11 may further call an image analysis algorithm to complete full-automatic detection and coordinate positioning of two defects.
Illustratively, when the automatic aging and defect detection of the dot matrix display screen 20 is started, the industrial personal computer 11 interacts with the driving device 123 through a network, and by setting or calling a preset point location and an aging time, the industrial camera 130 moves to an initial position where detection is required, and performs a back-and-forth motion according to a certain time to start the automatic detection.
The industrial personal computer 11 interacts with the dot matrix display screen 20 and the industrial camera 130 through a network, controls the dot matrix display screen 20, the display screen box 21 corresponding to the dot matrix display screen 20 is lighted in a partition mode, so that each display screen box 21 is one of the partition lamp panels 210, the display color of each partition lamp panel 210 is different from the display color of each partition lamp panel 210, and the display colors of the partition lamp panels 210 are sequentially switched. Meanwhile, the industrial camera 130 is controlled to be linked to screen out abnormal lamp panel images and store the abnormal lamp panel images to the industrial personal computer 11 through image acquisition, initial analysis and numbering.
After the detection of the display screen box 21 in the current row is finished, the industrial personal computer 11 controls the driving device 123 to move the industrial camera 130 to the position corresponding to the display screen box 21 in the next row, and the detection process is restarted; the operation is repeated until all the display screen boxes 21 are detected.
After all the partition lamp panel information with defects is stored in the industrial personal computer 11, the industrial personal computer 11 can call a deep learning algorithm to perform secondary analysis on the partition lamp panel information with defects so as to determine the defect types and the defect positions, and mark the defect positions in the images with abnormal results so as to record in a detection log, so that full-automatic aging defect detection is realized. Therefore, after the set aging test time is reached, the maintenance engineer can perform maintenance treatment on the defect type and the defect position recorded in the log by calling the detection log.
It is worth noting that, the automatic detection platform 10 for the display screen of the application can make the whole dot matrix display screen 20 repeatedly display by setting/calling the preset point position and the aging time, and the industrial camera 130 is used for capturing back and forth, so that the problem of missed detection of single capture or manual capture can be effectively avoided, and the detection accuracy rate is improved.
In addition, this application industrial computer 11 is through control dot matrix display screen 20 display screen box 21 carries out the subregion and lights, makes the subregion lamp plate image that industry camera 130 gathered has clear boundary to it is complete to follow in the whole box image intercept the subregion lamp plate image, and do not contain unnecessary edge region, and this helps right the subregion lamp plate image numbers, makes lamp pearl pixel in the subregion lamp plate image directly corresponds the coordinate, makes things convenient for the secondary positioning of follow-up defective coordinates, promotes the positioning accuracy.
It should be noted that, referring to fig. 3 of the drawings of the present application, there is further provided an automatic detection method for a display screen according to an embodiment of the present application, which may include the steps of:
s110: moving the monitoring mechanism to a position corresponding to a current display screen box body of the dot matrix display screen;
s120: controlling a plurality of subarea lamp panels of the current display screen box body to be lighted in subareas;
s130: controlling the monitoring mechanism to synchronously acquire the image of the current display screen box body for preliminary processing so as to obtain an abnormal lamp panel image, numbering and storing;
s140: moving the monitoring mechanism to a position corresponding to a next display screen box body of the dot matrix display screen so as to repeat the operations of the subarea lighting and the preliminary processing; and
s150: and calling a deep learning model to reprocess all the saved abnormal lamp panel images so as to obtain the defect types and the defect lamp point coordinates of the dot matrix display screen.
It should be noted that, although the automated inspection method for a display screen according to the above-mentioned embodiment of the present application describes the subarea lighting and the image capturing and preliminary processing in the order of the step S120 and the step S130, the order of the two is not meant. In fact, the step S120 and the step S130 are performed synchronously, that is, when any one of the partitioned lamp panels in the current display screen box is lighted to display different colors, the monitoring mechanisms respectively and simultaneously acquire images to perform the preliminary processing.
In the step S110 of the automated inspection method for a display screen of the present application: the monitoring mechanism is controlled to move to the preset point position by setting or calling the preset point position and the aging time so as to correspond to the current display screen box body of the dot matrix display screen.
In the step S140 of the automated inspection method for a display screen of the present application: the moving mechanism can be sequentially controlled to move the monitoring mechanism to the next preset position according to preset time, so that the monitoring mechanism sequentially corresponds to the next display screen box body of the dot matrix display screen. It can be understood that, in step S140, after the defective partition lamp panel image obtained by the monitoring mechanism is saved, the moving mechanism may be controlled to move the monitoring mechanism to the next preset position, so that the monitoring mechanism corresponds to the next display screen box of the dot matrix display screen.
According to the above embodiment of the present application, as shown in fig. 4, the step S120 of the automatic detection method for a display screen may include the steps of:
s121: controlling the current display screen box body to perform partition division so as to obtain a plurality of partition lamp panels distributed in an array; and
s122: and controlling any one of the partition lamp panels in the current display screen box body to be lightened so as to display the color required to be detected.
It is noted that, in the aging defect detection of the dot matrix display screen, at least four colors of red, green, blue and white images are generally required to be acquired. In other words, in step S122 of the present application, when each of the partitioned lamp panels is controlled to be turned on, each of the partitioned lamp panels will sequentially display four colors, namely, red, green, blue and white, so that the monitoring mechanism collects the partitioned lamp panel images of the four colors, namely, the red image, the green image, the blue image and the white image of the partitioned lamp panel.
In an example of the present application, as shown in fig. 4, the step S120 of the automated inspection method for a display screen may further include the step S123 of: and controlling other partitioned lamp panels in the current display screen box body to be extinguished synchronously.
Like this, this application step S130 just can be according to the border line between the illumination area in the box image of gathering and the extinction area, light and shade border promptly, follow intercept in the box image with be lighted the subregion lamp plate image of subregion lamp plate one-to-one, so that according to monitoring mechanism' S monitoring position the current display screen box is in position on the dot matrix display screen, lighted the subregion lamp plate is in position and the colour that shows on the current display screen box are to every the subregion lamp plate image is numbered.
Specifically, for example, when an n number of partitioned lamp panels in the current display screen box are lit to display an x color, image acquisition is performed on the current display screen box through an m number of industrial cameras in the monitoring mechanism, so as to intercept a corresponding partitioned lamp panel image from a box image according to a light and dark boundary, and then the partitioned lamp panel image is numbered as an m number of cameras-k columns-n number of lamp panels-x color. It can be understood that, work as current display screen box includes four subregion lamp plates, just when the subregion lamp plate need show red, green, blue, white four kinds of colours, every subregion lamp plate in the current display screen box is lighted in order to show different colours simultaneously, and other subregion lamp plates are extinguished, make industry camera need right current display screen box takes sixteen times successively to obtain sixteen subregion lamp plate images.
However, in a modified example of the present application, as shown in fig. 4, the step S120 of the automated detection method for a display screen may further include the step S123': and controlling other partition lamp panels in the current display screen box body to be synchronously lightened so that all the partition lamp panels in the current display screen box body respectively display different colors.
Like this, this application step S130 just can be according to the boundary line between the different colour regions in the box image of gathering, colour boundary promptly, follow intercept in the box image with subregion lamp plate one-to-one' S subregion lamp plate image, so that according to in the monitoring mechanism the serial number of industrial camera the current display screen box is in column number on the dot matrix display screen the subregion lamp plate is in serial number and the colour that shows on the current display screen box are every the subregion lamp plate image is numbered.
Specifically, for example, when an n number of partition lamp panels in the current display screen box are lit to display an x color, other number of partition lamp panels in the current display screen box are controlled to be lit to display different colors, and at this time, the current display screen box is subjected to image acquisition by an m number industrial camera in the monitoring mechanism, so that a plurality of partition lamp panel images are captured from a box image according to a color boundary, and then the partition lamp panel images can still be numbered according to the colors of m number camera-k row-n number lamp panels-x. It can be understood that, work as current display screen box includes four subregion lamp plates, just when the subregion lamp plate need show red, green, blue, white four kinds of colours, four subregion lamp plates of current display screen box can show different colours simultaneously, make industry camera only need right current display screen box shoots the quartic, just can obtain sixteen subregion lamp plate images, helps reducing the shooting number of times of industry camera shortens check-out time.
According to the above embodiment of the present application, as shown in fig. 5, the step S130 of the automatic detection method for a display screen may include the steps of:
s131: controlling a working camera of the monitoring mechanism to shoot the current display screen box body so as to obtain a box body image corresponding to the current display screen box body;
s132: controlling the working camera to intercept and take out the subarea lamp panel images which correspond to the subarea lamp panels of the current display screen box body one by one from the box body image according to the light and shade boundary or the color boundary so as to carry out numbering;
s133: controlling the working camera to perform preliminary analysis on the numbered subarea lamp panel images so as to judge whether the color values of all lamp bead pixels in each subarea lamp panel image are consistent;
s134: in response to the fact that color values of all lamp bead pixels in the current partition lamp panel image are completely consistent, controlling the working camera to discard the current partition lamp panel image; and
s135: and responding to the incomplete consistency of the color values of all lamp bead pixels in the current subarea lamp panel image, and controlling the working camera to transmit the current subarea lamp panel image to be saved as an abnormal lamp panel image.
It is worth noting that the automatic detection method for the display screen of the application can be but not limited to preliminarily judge the color values of all lamp bead pixels in the partition lamp panel image, namely preliminarily screen the partition lamp panel with defects by judging whether the color values of M x N lamp bead pixels in the partition lamp panel image are consistent or not. In other words, if the color values of all lamp bead pixels in the current partition lamp panel image are not completely consistent, the current partition lamp panel image and the number (such as the color of m number camera-k column-n number lamp panel-x) thereof are considered to be problematic, and the current partition lamp panel image and the number thereof are transmitted and stored in the industrial personal computer for subsequent secondary analysis; and if the color values of all lamp bead pixels in the current subarea lamp panel image are completely consistent, the subarea lamp panel corresponding to the current subarea lamp panel image is considered to be normal under the color, the acquired data and the acquired image do not need to be transmitted to the industrial personal computer, so that a large amount of normal and useless images can be prevented from being transmitted to the industrial personal computer, the storage space is saved, the calculated amount is reduced, and the analysis efficiency is improved.
In addition, in another example of the present application, step S130 of the automatic detection method for a display screen may be numbered in step S135 instead of step S132, which is helpful to omit numbering of normal partition lamp panel images and reduce the amount of calculation.
It can be understood that the complete agreement mentioned in the present application can be implemented, but is not limited to, that the fluctuation range between the color values of all the lamp bead pixels in the current partition lamp panel image is controlled within ± 5%; in other words, when the fluctuation range between the color values of all the lamp bead pixels in the current partition lamp panel image is greater than or equal to +/-5%, the color values of all the lamp bead pixels in the current partition lamp panel image are not completely consistent.
According to the above embodiment of the present application, as shown in fig. 6, the step S150 of the automatic detection method for a display screen may include the steps of:
s151: calling the trained deep learning model to perform secondary analysis on the stored abnormal lamp panel image so as to analyze the defect type and the defect position of the partitioned lamp panel corresponding to the abnormal lamp panel image; and
s152: and identifying the coordinates of the defective lamp points in the abnormal lamp panel image so as to record the coordinates in a detection log.
It should be noted that, in the step S151 of the present application, the deep learning model may be, but is not limited to, trained by lamp panel image samples that are manually marked with defect types and defect positions, so as to improve the analysis accuracy of the deep learning model. In addition, because the image that degree of depth learning model carried out secondary analysis all is the subregion lamp plate image after preliminary analysis for all lamp pearl pixels are point-to-point actual lamp pearl image in these subregion lamp plate images, made things convenient for the industrial computer carries out coordinate calibration and discernment, has reduced the operation complexity of back end industrial computer, helps improving detection efficiency.
In step S152 of the present application, since the coordinates of the defective lamp point are identified in the abnormal lamp panel image and recorded in the log, the maintenance engineer can call the detection log to perform maintenance processing on the coordinates of the defective lamp point and the type of the defect recorded in the log.
It is worth noting that the automatic detection method for the display screen can repeat the steps from S110 to S150 for many times in a mode of setting/calling the preset point position and the aging time, so that the problem of missed detection of single capture or manual capture is effectively avoided, and the detection accuracy is improved.
It is worth mentioning that an embodiment of the application can further provide an LED display screen, wherein the LED display screen adopts the above-mentioned automatic detection method for display screen to detect to realize full-automatic ageing defect detection, thoroughly liberate human labor, improve detection efficiency, and carry out the accurate positioning to the defect position, reduce stealthy bad missed measure probability such as lamp pearl problem and PCB little open circuit in the display screen effectively.
It should be noted that, referring to fig. 7 and 8 of the drawings of the present application, there is further provided a method for linkage collection of display screen images according to an embodiment of the present application, which may include the steps of:
s210: moving the industrial camera to a position corresponding to a current display screen box body of the dot matrix display screen;
s220: controlling a plurality of subarea lamp panels of the current display screen box body to be lighted in subareas so as to display the color to be monitored;
s230: controlling the industrial camera to shoot the current display screen box body and carrying out primary processing so as to number and store the abnormal lamp panel images; and
s240: and moving the industrial camera to a position corresponding to the next display screen box body of the dot matrix display screen, and repeating the partition lighting and the primary processing operation.
It should be noted that, in an example of the present application, as shown in fig. 8, the step S220 of the method for capturing display screen images in linkage may include the steps of:
s221: controlling any partition lamp panel in the current display screen box body to be lightened so as to sequentially display four colors of red, green, blue and white; and
s222: and controlling other partitioned lamp panels in the current display screen box body to be synchronously extinguished.
In another example of the present application, as shown in fig. 8, the step S220 of the method for linkage capturing of display screen images may also include the steps of:
s223: and controlling all the subarea lamp panels in the current display screen box body to be synchronously lightened so as to respectively and simultaneously display different colors.
It is worth mentioning that, referring to fig. 9 of the drawings attached to the present specification, there is further provided a method for preliminary processing an image according to an embodiment of the present application, which may include the steps of:
s310: intercepting partition lamp panel images which correspond to partition lamp panels of a current display screen box body one by one from box body images acquired by an industrial camera according to a light and shade boundary or a color boundary so as to carry out numbering;
s320: performing preliminary analysis on the numbered subarea lamp panel images to judge whether the color values of all lamp bead pixels in each subarea lamp panel image are consistent;
s330: in response to the fact that the color values of all lamp bead pixels in the current partition lamp panel image are completely consistent, discarding the current partition lamp panel image; and
s340: and responding to the incomplete consistency of the color values of all lamp bead pixels in the current partition lamp panel image, and transmitting the current partition lamp panel image to be stored as the abnormal lamp panel image.
It is to be noted that, in the step S310 of the method for preliminarily processing an image of the present application: the number of the partitioned lamp panel images can be numbered according to the serial number of the industrial camera, the number of columns of the current display screen box body on the dot matrix display screen, the serial number of the partitioned lamp panel on the current display screen box body and the displayed color. Of course, in other examples of the present application, the method for preliminarily processing the image may also number the partitioned lamp panel images in other manners, which is not described herein again.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. Automatic testing platform for display screen for carry out ageing defect detection to the dot matrix display screen, its characterized in that, automatic testing platform for display screen includes:
the industrial personal computer is used for being connected with the dot matrix display screen in a communication way so as to control the display screen box body of the dot matrix display screen to be sequentially lighted in a partition way;
the monitoring mechanism is connected with the industrial personal computer in a communication mode and is controlled by the industrial personal computer and used for acquiring images of the display screen box body; and
and the moving mechanism is controlled by the industrial personal computer and is used for moving the monitoring mechanism to a position corresponding to the display screen box which is lighted in a subarea manner, and the industrial personal computer is used for controlling the monitoring mechanism to collect the image of the display screen box which is lighted in the subarea manner so as to analyze and process the image and obtain the defect type and the defect position of the dot matrix display screen.
2. The automated testing platform for display screen of claim 1, wherein the moving mechanism comprises a guide rail, a bracket and a driving device, and the monitoring mechanism is disposed on the bracket, wherein the driving device is disposed between the guide rail and the bracket, and the driving device is configured to drive the bracket to move along the guide rail under the control of the industrial personal computer so as to drive the monitoring mechanism to move to a position corresponding to the display screen box that is lighted by the partition.
3. The automated video inspection platform of claim 2, wherein the monitoring mechanism comprises a plurality of industrial cameras, and wherein the plurality of industrial cameras are spaced apart from the support for simultaneously monitoring different display housings.
4. The automated inspection platform of claim 3, wherein each of the industrial cameras has an imaging accuracy higher than a dot pitch of the lamp beads in the display screen box, and a field of view covering at least one of the display screen boxes.
5. The automatic detection platform for the display screen according to claim 4, wherein the industrial camera is used for carrying out primary processing on the acquired box body image so as to intercept and screen out the abnormal lamp panel image and store the abnormal lamp panel image to the industrial personal computer.
6. The automatic detection platform for the display screen according to any one of claims 1 to 5, wherein the industrial personal computer is used for controlling one partition lamp panel in the display screen box of the dot matrix display screen to be lightened so as to sequentially display different colors, and other partition lamp panels to be extinguished; or the industrial personal computer is used for controlling a plurality of subarea lamp panels in the display screen box body of the dot matrix display screen to be lightened simultaneously and respectively display different colors.
7. The automatic detection method for the display screen is characterized by comprising the following steps of:
moving the monitoring mechanism to a position corresponding to a current display screen box body of the dot matrix display screen;
controlling a plurality of subarea lamp panels of the current display screen box body to be lighted in subareas;
controlling the monitoring mechanism to synchronously acquire the image of the current display screen box body for preliminary processing so as to obtain an abnormal lamp panel image, numbering and storing;
moving the monitoring mechanism to a position corresponding to a next display screen box body of the dot matrix display screen so as to repeat the operations of subarea lighting and preliminary treatment; and
and calling a deep learning model to reprocess all the saved abnormal lamp panel images so as to obtain the defect types and the defect lamp point coordinates of the dot matrix display screen.
8. The automatic detection method for the display screen according to claim 7, wherein the step of controlling the plurality of partitioned lamp panels of the current display screen box to be lighted by partitions comprises the steps of:
controlling the current display screen box body to perform partition division so as to obtain a plurality of partition lamp panels distributed in an array; and
controlling any partition lamp panel in the current display screen box body to be lightened, and displaying the color to be monitored; and
and controlling other partition lamp panels in the current display screen box body to be synchronously extinguished or controlling other partition lamp panels in the current display screen box body to be synchronously lightened so that all the partition lamp panels in the current display screen box body respectively display different colors.
9. The automatic detection method for the display screen according to claim 7 or 8, wherein the step of controlling the monitoring mechanism to synchronously acquire the image of the current display screen box body for preliminary processing to obtain the image of the abnormal lamp panel for numbering and saving comprises the steps of:
controlling a working camera of the monitoring mechanism to shoot the current display screen box body so as to obtain a box body image corresponding to the current display screen box body;
controlling the working camera to intercept the subarea lamp panel images which correspond to the subarea lamp panels of the current display screen box body one by one from the box body image according to the light and shade boundary or the color boundary so as to carry out numbering;
controlling the working camera to perform preliminary analysis on the numbered subarea lamp panel images so as to judge whether the color values of all lamp bead pixels in each subarea lamp panel image are consistent;
in response to the fact that color values of all lamp bead pixels in the current partition lamp panel image are completely consistent, controlling the working camera to discard the current partition lamp panel image; and
and responding to the incomplete consistency of the color values of all lamp bead pixels in the current subarea lamp panel image, and controlling the working camera to transmit the current subarea lamp panel image to be saved as the abnormal lamp panel image.
10. The automatic detection method for the display screen according to claim 7 or 8, wherein the step of calling the deep learning model to reprocess all the saved images of the abnormal lamp panel to obtain the defect types and the defect coordinates of the dot matrix display screen comprises the steps of:
calling the trained deep learning model to perform secondary analysis on the stored abnormal lamp panel image so as to analyze the defect type and the defect position of the partitioned lamp panel corresponding to the abnormal lamp panel image; and
the defect coordinates are identified in the abnormal lamp panel image to be recorded in a detection log.
An LED display screen, characterized in that the LED display screen is inspected by an automated inspection method using a display screen according to any one of claims 7 to 10.
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