Point inspection detection method and system for LED display device

Abstract

The invention relates to the technical field of LED display, in particular to a point inspection detection method and system of an LED display device. The LED display device comprises a display lamp panel, a plurality of lamp beads are arranged on the display lamp panel, a driving signal is sent to the display lamp panel through a driving module so that the lamp beads can be lightened line by line, at the moment, the lightened lamp beads can send an actual pulse signal to a point inspection module, after the point inspection module receives the pulse signal, a detection mode is started, and the detection mode is switched on; the line scanning detection module is used for carrying out line scanning detection on the display lamp panel to obtain a detection result and then sending the detection result to the driving module, and the driving module controls the display condition of the display lamp panel in the follow-up working process according to the detection result. By adopting the scheme of the invention, the pulse signal emitted by the display lamp panel can be detected through the point inspection module, so that the fault lamp bead in the display lamp panel can be positioned, the position of the fault lamp bead is sent to the driving module, and the fault detection of the display lamp panel can be efficiently realized.

Description

Technical Field

[0001] The present invention relates to the technical field of LED display, and particularly to a method and system for spot inspection and detection of an LED display device. Background Art

[0002] Generally, an LED display device includes a display lamp board, on which a plurality of lamp beads (LED chips or LED packages) are arranged. When a certain lamp bead has a problem or there is a problem in the circuit, it may affect the operation of adjacent lamp beads, thereby interfering with the smooth operation and visual effect of the entire display lamp board. Therefore, it needs to be detected before use. The existing detection methods are generally manual detection. Specifically, a preset test picture is sent through a receiving card, and the display effect of the LED display lamp board is observed by the human eye. The tester judges the type and position of the fault according to subjective experience. This manual-dependent detection method is limited by the physiological functions of the detection personnel, not only with low efficiency, but also the resolution accuracy of the human eye for minute color differences and gray levels in complex display scenarios is difficult to meet the detection requirements of modern high-density display modules, and it is also prone to visual fatigue and misjudgment. Summary of the Invention

[0003] A method and system for spot inspection and detection of an LED display device provided by the present invention effectively solve the problem of low efficiency of the existing detection methods.

[0004] According to a first aspect, in one embodiment, a method for spot inspection and detection of an LED display device is provided. The LED display device includes a display lamp board, on which a plurality of lamp beads are arranged. The method includes: Receiving a pulse signal sent by the display lamp board to trigger a detection instruction; Responding to the detection instruction, performing line scan detection on the display lamp board to obtain a detection result; Sending the detection result to a driving module; the driving module is configured to control the operation of the display lamp board according to the detection result.

[0005] In an implementable embodiment, the performing line scan detection on the display lamp board to obtain a detection result includes: Sequentially receiving pulse signals of each lamp bead in the display lamp board during the duration of the high level state of the control signal; Judging the position of the abnormal lamp bead in the display lamp board according to the relationship between the duration of the high level state of the control signal and the number of groups of input pulse signals.

[0006] In an implementable embodiment, the sequentially receiving pulse signals of each lamp bead in the display lamp board during the duration of the high level state of the control signal includes: When the control signal is at a high level, after receiving n1 groups of pulse signals, change the control signal to a low level to enable the detection mode; After the low level lasts for t1 time and stabilizes, change the control signal to a high level, and receive the pulse signal within the time when the high level lasts for t2; After the high level lasts for t2 time, change the control signal to a low level, and repeat the previous step; When sequentially detecting to the last line scan channel, the duration of the high level state of the control signal becomes t3. After receiving the pulse signal within the time when the high level state of the control signal lasts for t3, mark the completion of the line scan detection of the lamp beads.

[0007] In an implementable embodiment, the method for judging the position of the abnormal lamp beads in the display lamp board according to the relationship between the duration of the high level state of the control signal and the number of groups of input pulse signals includes: Judge whether the number of groups of pulse signals received within the time when the high level lasts for t2 is n2 groups, and whether the form of the pulse signals received within the t2 time matches the preset signal. If so, determine that the lamp beads corresponding to the current pulse signals are normal; otherwise, determine that the lamp beads corresponding to the current pulse signals are abnormal; During the detection process of the last line scan channel, judge whether the number of groups of pulse signals received within the time when the high level lasts for t3 is n3 groups, and whether the form of the pulse signals received within the t3 time matches the preset signal. If so, determine that the lamp beads corresponding to the pulse signals of the last line scan channel are normal; otherwise, determine that the corresponding lamp beads are abnormal.

[0008] In an implementable embodiment, after judging the position of the abnormal lamp beads in the display lamp board, it further includes: Judge the abnormal state of the abnormal lamp beads according to the preset voltage level; the abnormal state includes an open circuit state and a short circuit state.

[0009] In an implementable embodiment, the method for judging the abnormal state of the abnormal lamp beads according to the preset voltage level includes: Obtain the voltage value across the abnormal lamp beads; Compare the voltage value with a preset open circuit voltage threshold and a preset short circuit voltage threshold respectively; When the voltage value is less than the preset short circuit voltage threshold, determine that the abnormal lamp bead is in a short circuit state; when the voltage value is greater than the preset open circuit voltage threshold, determine that the abnormal lamp bead is in an open circuit state.

[0010] In an implementable embodiment, the driving module is used to control the operation of the display lamp board according to the detection result, including: The driving module reads the positions of the abnormal lamp beads in the detection results stored in the register; The driving module shields the control signals corresponding to the positions of the abnormal lamp beads, and at the same time, normally enables the control signals corresponding to the positions of the normal lamp beads.

[0011] According to a second aspect, in one embodiment, a spot-check detection system for an LED display device is provided. The LED display device includes a display lamp board, and a plurality of lamp beads are arranged on the display lamp board. The system includes a spot-check module, a display lamp board, and a driving module; The spot-check module is configured to: Receive the pulse signal sent by the display lamp board to trigger a detection instruction; In response to the detection instruction, perform line scanning detection on the display lamp board to obtain a detection result; and send the detection result to the driving module; The driving module is configured to control the operation of the display lamp board according to the detection result.

[0012] According to a third aspect, in one embodiment, a computer-readable storage medium is provided. A computer program is stored on the medium, and the computer program can be executed by a processor to implement the method as described above.

[0013] According to a fourth aspect, in one embodiment, a computer program product is provided, including a computer program and / or instructions, and when the computer program and / or instructions are executed by a processor, the method as described above is implemented.

[0014] According to the spot-check detection method / system of an LED display device in the above embodiment, a driving signal is sent from the driving module to the display lamp board to sequentially light up the LED lamp beads in the display lamp board. The lit LED lamp beads will send a pulse signal to the spot-check module. After receiving the pulse signal, the spot-check module turns on the detection mode, performs line scanning detection on the display lamp board to obtain a detection result, and then sends the detection result to the driving module. The driving module controls the display situation in the subsequent working process of the display lamp board by shielding the faulty constant current output according to the detection result. By adopting the above solution of the present application, the pulse signal sent by the display lamp board can be directly detected by the spot-check module to locate the faulty lamp beads in the display lamp board, and then the positions of the faulty lamp beads are sent to the driving module, thereby efficiently realizing the fault detection of the display lamp board. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a flowchart of the spot-check detection method provided in this embodiment; Figure 2 is a flowchart of obtaining the detection result provided in this embodiment; Figure 3 It is a structural block diagram of the spot inspection and detection system provided in this embodiment; Figure 4 It is a schematic circuit structure diagram of the spot inspection and detection system provided in this embodiment; Figure 5 It is a waveform diagram of the row scan detection of the display lamp board provided in this embodiment; Figure 6 It is a waveform diagram of the multiple row scan detections of the display lamp board provided in this embodiment; Reference numerals: 100, drive module; 200, display lamp board; 300, spot inspection module. Detailed implementation manners

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings through specific implementation manners. Similar elements in different implementation manners adopt related similar element numbers. In the following implementation manners, many detailed descriptions are for enabling a better understanding of the present application. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, which is to avoid the core part of the present application being submerged by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail, and they can completely understand the related operations according to the descriptions in the specification and the general technical knowledge in the art.

[0017] In addition, the features, operations, or characteristics described in the specification can be combined in any appropriate manner to form various implementation manners. At the same time, the steps or actions in the method description can also be reordered or adjusted in an obvious manner by those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for clearly describing a certain embodiment, and do not mean that they are the necessary sequences, unless it is stated that a certain sequence must be followed.

[0018] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. And the "connection" and "coupling" mentioned in the present application, unless otherwise specified, both include direct and indirect connections (couplings).

[0019] Refer to Figure 3 and Figure 4, a spot-check detection system for an LED display device provided in this embodiment. Among them, the LED display device includes a display light board, and a plurality of lamp beads are arranged on the display light board. The spot-check detection system includes a spot-check module 300, a display light board 200, and a driving module 100. Among them, the spot-check module 300 is used to: receive a pulse signal sent by the display light board 200 to trigger a detection instruction; in response to the detection instruction, perform row scanning detection on the display light board 200 to obtain a detection result; and send the detection result to the driving module 100. The driving module 100 is used to control the operation of the display light board 200 according to the detection result.

[0020] Specifically, first, the driving module 100 sends a driving signal to the display light board 200 to sequentially light up the LED lamp beads in the display light board 200. The lit LED lamp beads will send a pulse signal to the spot-check module 300. After the spot-check module 300 meets the conditions of the control signal level state and a specific number of pulse signals, it activates the detection mode, performs row scanning detection on the display light board 200 to obtain a detection result, and then sends the detection result to the driving module 100. The driving module 100 controls the display situation during the subsequent operation of the display light board 200 by masking the faulty constant current output according to the detection result. By adopting the spot-check detection system of the present application, the pulse signal sent by the display light board 200 can be directly detected by the spot-check module 300 to locate the faulty lamp beads in the display light board 200, and then the positions of the faulty lamp beads are sent to the driving module 100, thus efficiently realizing the fault detection of the display light board 200.

[0021] In actual applications, when there is a problem with an LED on the LED display light board 200 or a problem in the circuit, it may affect the operation of adjacent LEDs. To avoid affecting the normal operation of other LEDs, the present application proposes a spot-check detection system for an LED display device. This system is designed to pre-detect the circuit conditions of the LED light board. The solution of the present application will first scan the LED screen once and record whether the detected channel condition is an abnormal state, and then adjust the voltage level as a comparison standard. After that, the open / short circuit masking mode is enabled to turn off the faulty constant current output to reduce the impact of the faulty circuit on the overall operation. The faulty points can be transmitted back by the IC to facilitate the subsequent evaluation of the light board condition.

[0022] Reference Figure 1 , a spot-check detection method for an LED display device provided in this embodiment specifically includes the following steps: Step 100: Receive a pulse signal sent by the display light board 200. The pulse signal is used to change the level state of the control signal of the spot-check module 300 to trigger a detection instruction; Step 200: In response to the detection instruction, perform line scan detection on the display light board 200 to obtain a detection result; Step 300: Send the detection result to the driving module 100; the driving module 100 is used to control the operation of the display light board 200 according to the detection result.

[0023] Combined with Figure 4 the circuit structure schematic diagram, in this embodiment, an FPGA (LED constant current IC) is used as the driving module 100, which is connected to a line tube to form an LED driving circuit, and the constant current / line tube connection of the positive and negative electrodes of the LED is realized through a common anode or common cathode connection method. The number of line scans of the current display light board 200 (i.e., the number of line scans of the display light board 200) and whether to enable open / short circuit detection are set through the FPGA. Then, by performing a single line scan detection method, the line tube channels of the line scans to be detected are sequentially enabled, and then the detection function is executed until all line scan detections are completed.

[0024] Specifically, the FPGA outputs a corresponding constant current driving signal to the display light board according to the PWM signal. Among them, multiple output ports of the FPGA are respectively connected to the line tube channels of the line scans of the display light board. When the lamp beads in the display light board 200 are normal, the pulse signals received by the inspection module 300 will be consistent with the quantity and form of the PWM signal. When there are abnormalities in the lamp beads in the display light board 200, the pulse signals received by the inspection module 300 are less than the predetermined value, or their form does not match the corresponding PWM signal. Therefore, in this application, the inspection module 300 detects the difference in the quantity and form between the pulse signal output by the display light board 200 and the expected PWM signal to determine whether there are abnormalities in the LED lamp beads at a specific position in a certain row and the abnormal mode, so as to detect the abnormal lamp beads. Then, the inspection module 300 sends the detection result to the driving module 100, and the abnormal lamp beads are shielded through the driving module 100 to ensure the normal operation of other lamp beads in the display light board 200.

[0025] As Figure 2 shown, step 200 specifically includes the following steps: Step 210: Sequentially receive the pulse signals of each lamp bead in the display light board 200 during the duration of the high level state of the control signal; Step 220: Determine the position of the abnormal lamp bead in the display light board 200 according to the relationship between the duration of the high level state of the control signal and the number of groups of input pulse signals. Specifically, during the duration of the high level state of the control signal, the difference in the quantity and form between the received pulse signal and the expected PWM signal is detected and compared to determine the position of the abnormal lamp bead in the display light board 200.

[0026] In practical applications, before line scan detection, the line tube channels that require line scan detection are sequentially turned on. During the detection process of each line, the system activates the corresponding line scan channel to ensure independent control and detection of the lamp bead positions of that line. When the detection mode of the spot check module 300 is turned on (i.e., during line scan detection), the spot check module 300 turns on the detection mode by controlling the change of the level state of the specified pin and receiving the input of pulse signals at the remaining specific pins. Among them, the specified pin is used to input the control signal, and the specific pins respectively correspond to the output signals of each lamp bead in the line tube channel of the display lamp board.

[0027] Specifically, when the control signal is at a high level, after receiving n1 groups of pulse signals, the control signal is changed to a low level to turn on the detection mode. After the detection is turned on, each pin will wait for the line tube output to stabilize, and then start the detection. For example, as Figure 5 shown, when the LAT signal is at a high level, after covering 7 groups of pulse signals at the DCK input, the LAT signal is changed to a low level to turn on the detection mode. After the detection mode is turned on, each constant current output pin will wait for the line tube output to stabilize, and start the detection sequentially after ensuring that all relevant signals are stable.

[0028] After the low level lasts for t1 time and stabilizes, the control signal is changed to a high level, and pulse signals are received within the time when the high level lasts for t2. After the high level lasts for t2 time, the control signal is changed to a low level, and the above steps are repeated. When sequentially detecting to the last line scan channel, the duration of the high level state of the control signal becomes t3. After receiving pulse signals within the time when the high level state of the control signal lasts for t3, it is marked that the line scan detection of the lamp beads is completed. The detection point is when the specified pin input is HIGH (high level), and pulse signals are input at the specific pins, that is, when receiving a specific number of pulse signals and then dropping to LOW in the state where the specified input is HIGH is the detection point. For example, as Figure 5 shown, after waiting for the line scan line tube to stabilize, the control signal changes from the above low level to a high level. After covering 3 groups of pulse signals at the DCK input, the control signal is changed to a low level. At this time, it is the first detection point (such as Figure 5 the out[0] detection in), execute the number of times of the constant current output pins and wait for a period of time to stabilize, and sequentially perform pin detection in this way until the level signal of the last channel of the current line scan covers 1 group of pulse signals at the DCK input, and then the spot check of this line scan ends. After the line scan detection is completed, the total number of points of this line scan will be continuously transmitted, and all spot check information will be returned from the data output end.

[0029] After the current line scan inspection is completed, the inspection module 300 determines whether the number of pulse signal groups received within the high-level duration t2 of the detection point is n2 groups, and whether the form of the pulse signals received within the t2 time matches the preset PWM signal. If so, it is determined that the lamp bead corresponding to the current pulse signal is normal; otherwise, it is determined that the lamp bead corresponding to the current pulse signal is abnormal. During the detection process of the last line scan channel, it is judged whether the number of pulse signal groups received within the high-level duration t3 is n3 groups, and whether the form of the pulse signals received within the t3 time matches the preset PWM signal. If so, it is determined that the lamp bead corresponding to the pulse signal of the last line scan channel is normal; otherwise, it is determined that the corresponding lamp bead is abnormal.

[0030] For example, when the duration of the high-level state of the control signal in a normal detection point is set to 10 μs, it is required to satisfy the reception of 3 groups of pulse signals for the wrapped DCK input. However, within the 10 μs duration of the high level in the current detection point, if the input pulse signals are missing or the pulse signals exist but the number of groups is less than 3 groups, for example, 0 groups or 2 groups of pulse signals are input for the wrapped DCK, the inspection module 300 will determine that the lamp bead corresponding to the detection point of the current line scan channel is an abnormal lamp bead. Only when 3 groups of pulse signals are input for the wrapped DCK within 10 μs and the form matches the PWM signal, will the inspection module 300 determine that the lamp bead corresponding to the current detection point is a normal lamp bead.

[0031] In some embodiments, the position of the abnormal lamp beads in the display lamp board 200 is determined by detecting and comparing the quantity and form differences between the received pulse signals and the expected PWM signals. After determining the position of the abnormal lamp beads in the display lamp board 200, it further includes: judging the abnormal state of the abnormal lamp beads according to a preset voltage level; the abnormal state includes an open circuit state and a short circuit state.

[0032] In practical applications, a register is used to control the detection start open / short circuit voltage level and the open / short circuit detection mode. Specifically, the register reads the voltage value across the abnormal lamp bead, and then compares the voltage value with a preset open circuit voltage threshold and a preset short circuit voltage threshold respectively; when the voltage value is less than the preset short circuit voltage threshold, it is determined that the abnormal lamp bead is in a short circuit state, and when the voltage value is greater than the preset open circuit voltage threshold, it is determined that the abnormal lamp bead is in an open circuit state.

[0033] In addition, in the solution of the present application, the driving module 100 may include multiple constant current ICs, and each constant current IC controls a single line scan channel in the display lamp board 200. After the current line scan detection is completed, the DCK continuously inputs pulse signals, and the inspection module 300 transmits the total number of point positions of this line scan to the corresponding constant current IC (i.e., FPGA), and all the inspection data of this line scan will be returned from the data output end in units of each constant current IC.

[0034] As shown Figure 6 in the figure, the data output pin DAO will output the complete detection results of each IC in this line scan in sequence starting from the result of the last output pin of the last IC. The results will also be stored inside the IC. Among them, enabling the open / short circuit detection result function will also enable the masking of the constant current output pins of this line scan according to the stored results.

[0035] Furthermore, the driving module 100 is used to control the operation of the display lamp board 200 according to the detection results, specifically including: The driving module 100 reads the positions of the abnormal lamp beads in the detection results stored in the register; The driving module 100 masks the control signals corresponding to the positions of the abnormal lamp beads, and at the same time, normally enables the control signals corresponding to the positions of the normal lamp beads.

[0036] In this implementation scheme, after the detection is completed, the driving module 100 sets the duty cycle of the PWM waveform of the corresponding channel of the abnormal lamp bead in the open circuit state to zero by reading the open / short circuit detection results stored in the register, and turns off the output of the corresponding constant current driving signal; for the abnormal lamp bead in the short circuit state, the duty cycle of the PWM waveform of the corresponding channel is set to zero, and the output current value of the corresponding constant current driving signal is reduced to the threshold.

[0037] A computer-readable storage medium provided in this embodiment stores a computer program that can be executed by a processor to implement the above method. Since a method for spot inspection and detection of an LED display device has been elaborated in detail in the above embodiments, this embodiment will not be elaborated too much here.

[0038] A computer program product provided by this embodiment includes a computer program and / or instructions. When the computer program and / or instructions are executed by a processor, the above method is implemented. Since a method for spot-check detection of an LED display device has been elaborated in detail in the above embodiment, this embodiment will not be elaborated too much here. Those skilled in the art can understand that all or part of the functions of the above methods can be implemented in a hardware manner or in a computer program manner. When all or part of the functions in the above embodiments are implemented in a computer program manner, the program can be stored in a computer-readable storage medium, and the storage medium can include: read-only memory, random access memory, magnetic disk, optical disk, hard disk, etc. The above functions are implemented by the computer executing the program. For example, the program is stored in the memory of the device, and when the program in the memory is executed by the processor, all or part of the above functions can be implemented. In addition, when all or part of the functions in the above embodiments are implemented in a computer program manner, the program can also be stored in a storage medium such as a server, another computer, magnetic disk, optical disk, flash drive or mobile hard disk, and saved to the memory of the local device by downloading or copying, or the system of the local device is updated. When the program in the memory is executed by the processor, all or part of the functions in the above embodiments can be implemented.

[0039] The above uses specific examples to elaborate on the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art of the present invention, according to the idea of the present invention, several simple deductions, deformations or substitutions can also be made.

Claims

1. A spot inspection and detection method for an LED display device, wherein the LED display device comprises a display light board, and a plurality of lamp beads are arranged on the display light board, characterized in that: The method comprises: Receiving a pulse signal sent by the display light board, wherein the pulse signal is used to change the level state of the control signal to trigger a detection instruction; In response to the detection instruction, scanning the display light board to obtain a detection result; The detection result is sent to a driving module; the driving module is used to control the operation of the display light board according to the detection result.

2. The spot inspection detection method according to claim 1, characterized in that: The scanning detection of the display light panel to obtain the detection result includes: Sequentially receiving pulse signals from each lamp bead in the display lamp panel during the duration of the high level state of the control signal; The position of the abnormal lamp bead in the display lamp panel is determined according to the relationship between the duration of the high level state of the control signal and the number of groups of the pulse signal input.

3. The spot inspection detection method according to claim 2, characterized in that: The step of sequentially receiving pulse signals of each lamp bead in the display lamp panel during the duration of the high level state of the control signal comprises: When the control signal is at a high level, after receiving the pulse signal of group n1, the control signal is changed to a low level to start the detection mode; After the low level lasts for t1 time and becomes stable, the control signal is changed to a high level, and the pulse signal is received while the high level lasts for t2 time; After the high level lasts for t2 time, the control signal is changed to a low level and the previous step is repeated; When the last row scanning channel is detected in sequence, the duration of the high level state of the control signal becomes t3. After the pulse signal is received during the t3 period of time when the high level state of the control signal continues, it indicates that the row scanning detection of the lamp bead is completed.

4. The spot inspection and detection method according to claim 3, characterized in that: The method of determining the position of the abnormal lamp beads in the display lamp panel according to the relationship between the duration of the high level state of the control signal and the number of groups of the pulse signal input comprises: Determine whether the number of groups receiving the pulse signal during the high level duration t2 is n2 groups, and whether the form of the pulse signal received during t2 matches the preset signal. If so, determine that the lamp bead corresponding to the current pulse signal is normal, otherwise determine that the lamp bead corresponding to the current pulse signal is abnormal; During the detection process of the last scanning channel, it is determined whether the number of groups receiving the pulse signal during the high level duration t3 is n3 groups, and whether the form of the pulse signal received during t3 matches the preset signal. If so, the lamp bead corresponding to the pulse signal of the last scanning channel is determined to be normal, otherwise the corresponding lamp bead is determined to be abnormal.

5. The spot inspection and detection method according to claim 2, characterized in that: After determining the position of the abnormal lamp beads in the display lamp panel, the method further includes: The abnormal state of the abnormal lamp bead is determined according to a preset voltage level; the abnormal state includes an open circuit state and a short circuit state.

6. The spot inspection and detection method according to claim 5, characterized in that: The step of determining the abnormal state of the abnormal lamp bead according to the preset voltage level includes: Obtaining the voltage value at both ends of the abnormal lamp bead; Comparing the voltage value with a preset open circuit voltage threshold and a preset short circuit voltage threshold respectively; When the voltage value is less than the preset short-circuit voltage threshold, the abnormal lamp bead is determined to be in a short-circuit state; when the voltage value is greater than the preset open-circuit voltage threshold, the abnormal lamp bead is determined to be in an open-circuit state.

7. The spot inspection and detection method according to claim 1, characterized in that: The driving module is used to control the operation of the display light board according to the detection result, including: The driving module reads the position of the abnormal lamp bead in the detection result stored in the temporary register; The driving module shields the control signal corresponding to the abnormal lamp bead position, and at the same time, normally enables the control signal corresponding to the normal lamp bead position.

8. A spot inspection and detection system for an LED display device, the LED display device comprising a display light board, a plurality of lamp beads are arranged on the display light board, characterized in that: The system includes an inspection module, a display light board and a drive module; The inspection module is used for: Receiving a pulse signal sent by the display light board to trigger a detection instruction; In response to the detection instruction, the display light board is scanned to detect to obtain a detection result; and the detection result is sent to the driving module; The driving module is used to control the operation of the display light board according to the detection result.

9. A computer-readable storage medium, characterized in that: A computer program is stored on the medium, and the computer program can be executed by a processor to implement the method according to any one of claims 1 to 7.

10. A computer program product comprising a computer program and / or instructions, characterized in that: When the computer program and / or the instructions are executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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