LED adjustment event detection method and device, electronic equipment and medium

Abstract

The application is suitable for the technical field of LED circuit detection, and provides an LED event to be adjusted detection method, an LED event to be adjusted detection device, an electronic device and a medium. The LED control unit communicates with all driving chips in the LED driving circuit through a communication bus. A plurality of unit periods are configured for a feedback period, and each unit period corresponds to a preset event to be adjusted. Then, the target unit period can be determined according to the time information of the feedback signal, and the preset event to be adjusted corresponding to the target unit period is taken as the target event to be adjusted. Thus, the pin number requirement of the LED control unit is reduced, the excessive wiring between the driving chip and the LED control unit is avoided, and a lower-cost and wider-range LED event to be adjusted detection scheme is provided.

Description

Technical Field

[0001] This application belongs to the field of LED circuit testing technology, and in particular relates to an LED event detection method, an LED event detection device, an electronic device, and a computer-readable storage medium. Background Technology

[0002] Currently, most LED screens are driven by partitioning. That is, the LED panel in the LED screen is divided into several LED blocks, and a driver chip in the LED driver circuit drives the LED blocks in the same row or column. Since the feedback terminal of the driver chip is connected to the LED control unit, the driver chip can be used to realize the detection and multiplexing of LED adjustment events, and send a feedback signal to the LED control unit when an adjustment event occurs.

[0003] However, as LED screens become larger and are divided into more and more blocks, the number of driver chips required also increases. Connecting the feedback terminal of each driver chip to the LED control unit separately necessitates configuring more connection terminals for the LED control unit, increasing costs and complicating the internal wiring of the LED screen. Therefore, existing LED event detection solutions have a limited scope of application. Summary of the Invention

[0004] In view of this, embodiments of this application provide an LED event detection method, an LED event detection device, an electronic device, and a computer-readable storage medium to solve the problem that existing LED event detection schemes have a limited scope of application.

[0005] A first aspect of this application provides an LED event detection method for an LED control unit, which is connected to an LED driving circuit. The LED driving circuit includes multiple driving chips. The method includes:

[0006] Within a preset feedback cycle, the feedback signal sent by the LED driver circuit is monitored; the feedback signal is the signal sent by any driver chip in the LED driver circuit to the LED control unit through the communication bus when a preset event to be adjusted is detected; the feedback cycle includes multiple unit cycles, and each unit cycle corresponds to a preset event to be adjusted.

[0007] The target unit period is determined based on the time information of the feedback signal;

[0008] The preset event to be adjusted corresponding to the target unit period is taken as the target event to be adjusted.

[0009] A second aspect of this application provides an LED event detection device for an LED control unit. The LED control unit is connected to an LED driving circuit, and the LED driving circuit includes multiple driving chips. The device includes:

[0010] The monitoring unit is used to monitor the feedback signal sent by the LED driver circuit within a preset feedback cycle. The feedback signal is a signal sent by any driver chip in the LED driver circuit to the LED control unit through the communication bus when a preset event to be adjusted is detected. The feedback cycle includes multiple unit cycles, and each unit cycle corresponds to a preset event to be adjusted.

[0011] The first execution unit is used to determine the target unit cycle based on the time information of the feedback signal;

[0012] The second execution unit is used to take the preset event to be adjusted corresponding to the target unit cycle as the target event to be adjusted.

[0013] A third aspect of this application provides an electronic device, the electronic device including a memory, a processor, and a computer program stored in the memory and executable on the electronic device, wherein the processor executes the computer program to implement the steps of the LED adjustment event detection method provided in the first aspect.

[0014] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the LED adjustment event detection method provided in the first aspect.

[0015] The LED event detection method, device, electronic device, and computer-readable storage medium provided in this application have the following advantages:

[0016] This application provides a method for detecting LED adjustment events, applied to an LED control unit. The LED control unit is connected to an LED driving circuit, which includes multiple driver chips. Within a preset feedback period, the LED control unit monitors feedback signals sent by the LED driving circuit. Since this feedback signal is sent to the LED control unit via a communication bus by any one of the driver chips in the LED driving circuit when a preset adjustment event is detected, it is not necessary to connect each driver chip in the LED driving circuit to the LED control unit individually to return a feedback signal. Furthermore, because the feedback period includes multiple unit periods, and each unit period corresponds to a preset adjustment event, the target unit period can be determined based on the time information of the feedback signal. Therefore, the preset adjustment event corresponding to the target unit period can be used as the target adjustment event, thereby achieving LED fault detection. In the above scheme, the LED control unit communicates with all the driver chips in the LED driver circuit via a communication bus. When any driver chip in the LED driver circuit detects a preset adjustment event generated by the LED module, the LED control unit can monitor the fault signal sent by the driver chip through the communication bus. Therefore, it is not necessary to connect each driver chip in the LED driver circuit to the LED control unit separately, so that the driver chip can feed back the monitored feedback signal to the LED control unit. By configuring multiple unit cycles for the feedback period and assigning each unit cycle to a preset adjustment event, the target unit cycle can be determined based on the time information of the feedback signal. The preset adjustment event corresponding to the target unit cycle can then be used as the target adjustment event. This reduces the pin count requirement of the LED control unit and avoids excessive wiring between the driver chip and the LED control unit, providing a lower-cost and more widely applicable LED adjustment event detection scheme. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall scheme of an LED event detection method provided in an embodiment of this application;

[0019] Figure 2 This is a flowchart illustrating the implementation of an LED event detection method according to an embodiment of this application.

[0020] Figure 3This is a schematic diagram of the feedback signal monitored during the feedback period in the embodiments of this application. Figure 1 ;

[0021] Figure 4 This is a schematic diagram of the feedback signal monitored during the feedback period in the embodiments of this application. Figure 2 ;

[0022] Figure 5 This is a schematic diagram of the feedback signal monitored during the feedback period in the embodiments of this application. Figure 3 ;

[0023] Figure 6 This is a flowchart illustrating the implementation of an LED adjustment event detection method according to another embodiment of this application;

[0024] Figure 7 This is a structural block diagram of an LED event detection device provided in an embodiment of this application;

[0025] Figure 8 This is a structural block diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0027] This embodiment provides a method for detecting LED adjustment events. The executing entity is an LED control unit, which can also be a control unit in the electronic device where the LED is located, specifically a controller CPU. Here, the electronic device can be a mobile terminal such as a mobile phone or tablet, or an electronic terminal with a display module such as a monitor or television.

[0028] Currently, most LED screens are driven by partitioning. That is, the LED panel in the LED screen is divided into several LED blocks, and a single driver chip in the LED driver circuit drives the LED blocks in the same row or column. Since the feedback terminal of the driver chip is connected to the LED control unit, LED fault detection can be multiplexed using the driver chip, and a feedback signal can be sent to the LED control unit when a fault occurs.

[0029] However, as LED screens become larger and are divided into more and more blocks, the number of driver chips required also increases. Connecting the feedback terminal of each driver chip to the LED control unit separately necessitates configuring more connection terminals for the LED control unit, increasing costs and complicating the internal wiring of the LED screen. Therefore, existing LED fault detection solutions have a limited scope of application.

[0030] To address the aforementioned issues, this application provides a method for detecting LED events requiring adjustment. This method is applied to an LED control unit, which is connected to an LED driving circuit. The LED driving circuit includes multiple driver chips. Within a preset feedback period, the LED control unit monitors feedback signals sent by the LED driving circuit. Since these feedback signals are sent by any one of the driver chips in the LED driving circuit to the LED control unit via a communication bus when a preset event requiring adjustment is detected, it is not necessary to connect each driver chip in the LED driving circuit to the LED control unit individually to return a feedback signal. Furthermore, because the feedback period includes multiple unit periods, and each unit period corresponds to a preset event requiring adjustment, the target unit period can be determined based on the time information of the feedback signal. Therefore, the preset event requiring adjustment corresponding to the target unit period can be used as the target event requiring adjustment, thus achieving the detection of LED events requiring adjustment.

[0031] Figure 1 This paper illustrates an overall schematic diagram of an LED event detection method according to an embodiment of this application. Figure 1 As shown, the LED control unit is connected to the LED driver circuit, which includes multiple driver chips. Figure 1 In this embodiment, the driver chip is connected to the LED module, which can be considered as multiple LED blocks in the same row or column of the screen of an electronic device. The screen of the electronic device can include multiple LED blocks, each of which can be considered as a matrix of LEDs. These multiple LED blocks form the LED matrix on the screen. It should be noted that in all embodiments of this application, LED fault detection refers to fault detection of the LED module. The LED power supply provides operating power to the first terminal of the LED module, and the driver chip can control the voltage at the second terminal of the LED module to achieve constant current driving of the LED module. Each driver chip in the LED driver circuit establishes bus communication with the LED control unit. When the driver chip detects a fault in the LED module, it can return a feedback signal to the LED control unit through the communication bus. Here, the driver chip can detect the voltage to ground at the second terminal of the LED module, thereby determining whether the LED module has experienced an event requiring adjustment.

[0032] For example, if the driver chip detects that the voltage to ground at the second terminal of the LED module is less than the normal operating threshold of the LED module, it can determine that an undervoltage event has occurred in the LED module.

[0033] For example, if the driver chip detects that the voltage to ground at the second terminal of the LED module is much greater than the normal operating threshold of the LED module, it can determine that an overvoltage event has occurred in the LED module. Additionally, the driver chip can also detect the temperature of the LED module's operating environment to determine if an overtemperature event has occurred.

[0034] For example, if the driver chip detects that the voltage to ground at the second terminal of the LED module is greater than or equal to the short-circuit threshold, it can determine that a short-circuit event has occurred in the LED module.

[0035] For example, if the driver chip detects that the voltage to ground at the second terminal of the LED module is equal to 0, it can be determined that an open circuit event has occurred in the LED module.

[0036] In practical implementation, the LED control unit and the driver chip are connected via a communication bus. For example, a single bus, dual bus, unidirectional transmission, or bidirectional transmission can all be used; there are no restrictions here. Alternatively, the driver chips in the LED driver circuit can be connected in series, and the bus communication function can be achieved through the internal wiring in each driver chip.

[0037] In the above scheme, the LED control unit communicates with all the driver chips in the LED driver circuit via a communication bus. When any driver chip in the LED driver circuit detects a preset adjustment event generated by the LED module, the LED control unit can monitor the fault signal sent by the driver chip through the communication bus. Therefore, it is not necessary to connect each driver chip in the LED driver circuit to the LED control unit separately, so that the driver chip can feed back the monitored feedback signal to the LED control unit. By configuring multiple unit cycles for the feedback period and assigning each unit cycle to a preset adjustment event, the target unit cycle can be determined based on the time information of the feedback signal. The preset adjustment event corresponding to the target unit cycle can then be used as the target adjustment event. This reduces the pin count requirement of the LED control unit and avoids excessive wiring between the driver chip and the LED control unit, providing a lower-cost and more widely applicable LED adjustment event detection scheme.

[0038] The following provides a detailed description of the LED adjustment event detection method provided in this embodiment through specific implementation.

[0039] Figure 2 A flowchart illustrating the implementation of an LED adjustment event detection method provided in an embodiment of this application is shown. Figure 2As shown, the LED event detection method includes the following steps:

[0040] 110: Monitor the feedback signal sent by the LED driver circuit within the preset feedback period.

[0041] In 110, the preset feedback cycle includes multiple unit cycles, each unit cycle corresponding to a preset event to be adjusted. The feedback signal is a signal sent to the LED control unit via the communication bus by any driver chip in the LED driver circuit when it detects the preset event to be adjusted.

[0042] In this embodiment, the LED control unit monitors the feedback signal within a preset feedback period, specifically monitoring the voltage changes on the communication bus. Since the feedback signal is sent from the LED driver circuit to the LED control unit via the communication bus, and can be sent by any driver chip in the LED driver circuit when a preset adjustment event is detected, this feedback signal can be used to indicate whether an adjustment event has occurred in the LED module. Here, the preset feedback period can be divided into multiple unit periods, and each unit period corresponds to a different preset adjustment event. Based on this, the type of preset adjustment event can be determined according to the correspondence between the feedback signal and each unit period within the preset feedback period.

[0043] In practical implementation, each driver chip in the LED driver circuit can be of the same model. The LED control unit can connect to each driver chip via a bidirectional communication bus, thus enabling the monitoring of feedback signals sent by any driver chip. Alternatively, adjacent driver chips can be connected in series via unused pins to form a series driver circuit, and the communication bus function can be implemented through internal wiring. The LED control unit only needs to connect to the first driver chip in this series driver circuit to monitor feedback signals through the internal wiring of the series driver circuit.

[0044] As an example, since the preset feedback period can be divided into multiple unit periods, and each unit period corresponds to a different preset event to be adjusted, a corresponding feedback signal configuration script can be configured in each driver chip during implementation. That is, the feedback signal configuration script indicates the correspondence between each unit period and each preset event to be adjusted within the preset feedback period. Based on this, when the driver chip detects any preset event to be adjusted, it can return a feedback signal within the corresponding unit period according to this correspondence.

[0045] As for how to determine the preset feedback cycle, it can include, but is not limited to, the following two scenarios.

[0046] Scenario 1: After the LED control unit sends a control signal to the LED driver circuit, the LED control unit monitors the feedback signal sent by the LED driver circuit within a preset feedback period.

[0047] For example, when the screen displays an image, the LED control unit generates a brightness control signal based on the image content and sends it to the LED driver circuit via the communication bus. After sending the brightness control signal, it also sends a feedback command to the LED driver circuit and finally releases access to the communication bus. Within a preset feedback period, it monitors the feedback signal sent by the LED driver circuit. Here, the feedback command instructs all driver chips in the LED driver circuit to send back the feedback signal corresponding to the preset adjustment event detected within the preset feedback period after driving the LED module according to the brightness control signal to the LED control unit.

[0048] Scenario 2: The LED control unit can also monitor the feedback signal sent by the LED driver circuit within a preset feedback period after receiving the response signal from the LED driver circuit.

[0049] For example, the LED control unit sends a brightness control signal to the LED driver circuit via a communication bus. After receiving the response information from the LED driver circuit, it releases access to the communication bus and monitors the feedback signal sent by the LED driver circuit within a preset feedback period. Here, the response information indicates that all driver chips in the LED driver circuit have received the brightness control signal, and monitors whether a preset adjustment event has occurred in the LED module when driving the LED module according to the brightness control signal.

[0050] 120: Determine the target unit period based on the time information of the feedback signal.

[0051] In step 120, the timing information of the feedback signal is used to indicate when the feedback signal was detected. That is, this timing information can be considered the point in time when the feedback signal was detected. Correspondingly, the target unit period refers to the unit period containing the time point corresponding to this timing information.

[0052] In practical implementation, the time information of the feedback signal can also be the duration of the feedback signal. By comparing the duration with the preset feedback period, the unit period that has the same time point as the duration is determined as the target unit period.

[0053] As one embodiment, the feedback signal includes a target level. Accordingly, step 120 may specifically include: obtaining the start time point of the target level in the feedback signal; and using the unit period corresponding to the start time point as the target unit period.

[0054] In this embodiment, the communication bus can be in a high-level state or a low-level state by default, and correspondingly, the target level can be a low-level or a high-level state.

[0055] For example, in a specific implementation, the communication bus can be set to a high-level state by default. When the driver chip detects a preset event to be adjusted, it pulls the communication bus level low, thereby sending a feedback signal to the LED control unit via the communication bus. At this time, the LED control unit detects the communication bus level changing from high to low; the time point of this level change is the starting time point of the target level. Similarly, the communication bus can be set to a low-level state by default. When the driver chip detects a preset event to be adjusted, it pulls the communication bus level high, thereby sending a feedback signal to the LED control unit via the communication bus. At this time, the LED control unit detects the communication bus level changing from low to high; the time point of this level change is the starting time point of the target level.

[0056] It should be noted that since all driver chips in the LED driver circuit are connected to the LED control unit via a communication bus, multiple driver chips can simultaneously pull down or raise the communication bus voltage within each unit cycle. At this time, the LED control unit detects a feedback signal, indicating that a preset adjustment event has occurred in the LED module on the screen. Here, it is not necessary to identify the faulty LED module or LED block on the screen; therefore, it is not necessary to determine which driver chip in the LED driver circuit pulled down or raised the communication bus voltage.

[0057] It is understandable that, since the target level in the feedback signal indicates the occurrence of a preset event to be adjusted, and the preset feedback period includes multiple unit periods, and each unit period corresponds to a preset event to be adjusted, there may be multiple target levels in the feedback signal.

[0058] Based on the above embodiments, as one possible implementation, the above step: obtaining the start time point of the target level in the feedback signal can specifically be: obtaining the start time point of each segment of the target level. Correspondingly, the above step: using the unit period corresponding to the start time point as the target unit period can specifically be: using the unit period corresponding to each start time point as the target unit period.

[0059] Here, since the starting time of the target level must fall within one unit period of the preset feedback period, the unit period corresponding to each segment of the target level can be taken as the target period.

[0060] Figure 3 This illustration shows the feedback signal monitored during the feedback period in an embodiment of this application. Figure 1.by Figure 3 Taking the feedback signal monitored during the feedback period shown as an example, in Figure 3 In this context, the preset feedback period T includes a first unit period T1, a second unit period T2, a third unit period T3, a fourth unit period T4, and a fifth unit period T5. In feedback signal 1, with a low level as the target level, feedback signal 1 includes a target level segment LA corresponding to the first unit period T1, a target level segment LD corresponding to the fourth unit period T4, and a target level segment LE corresponding to the fifth unit period T5. For example... Figure 3 As shown, the starting time point t1 of the target level segment LA, the starting time point t2 of the target level segment LD, and the starting time point t3 of the target level segment LD are obtained. Then, the first unit period T1 corresponding to the starting time point t1, the fourth unit period T4 corresponding to the starting time point t2, and the fifth unit period T5 corresponding to the starting time point t3 are all taken as the target unit period.

[0061] In other embodiments, the preset events to be adjusted can be prioritized, with higher priority preset events corresponding to earlier unit cycles. In this way, only the first segment of the target level can be considered.

[0062] As an example, the above step of obtaining the start time point of the target level in the feedback signal can specifically be: obtaining the start time point of the first segment of the target level. Correspondingly, the above step of using the unit period corresponding to the start time point as the target unit period can specifically be: using the unit period corresponding to the start time point of the first segment of the target level as the target unit period.

[0063] In this embodiment, the starting time of the first target level refers to the time when the first target level in the feedback signal is detected.

[0064] Figure 3 The diagram shows the feedback signal monitored during the feedback period. Figure 1 .by Figure 3 As shown in the example, the preset feedback period T includes a first unit period T1, a second unit period T2, a third unit period T3, a fourth unit period T4, and a fifth unit period T5. In feedback signal 1, with a low level as the target level, feedback signal 1 includes a target level segment LA corresponding to the first unit period T1, a target level segment LD corresponding to the fourth unit period T4, and a target level segment LE corresponding to the fifth unit period T5. Figure 3 As shown, the target level of the first segment is LA. The starting time point of the target level of the first segment is obtained, which is the starting time point t1 of the target level segment LA. The unit period corresponding to the starting time point t1 of the target level of the first segment is taken as the target unit period, which is the first unit period T1 as the target unit period.

[0065] Taking the following as an example, the preset events to be adjusted include at least: undervoltage event, overvoltage event, overtemperature event, short circuit event, and open circuit event. Following the above order, the undervoltage event is the highest priority preset event to be adjusted, the overvoltage event is the second highest priority, and so on, with the open circuit event being the lowest priority. Correspondingly, the unit period corresponding to the undervoltage event can be the first unit period within the preset feedback period, the unit period corresponding to the overvoltage event can be the second unit period within the preset feedback period, and so on, with the unit period corresponding to the open circuit event being the last unit period within the preset feedback period. Based on this, when there are multiple target levels in the feedback signal, the starting time point of obtaining the first target level in the feedback signal must be the starting time point corresponding to the preset event to be adjusted with higher priority. Therefore, even if multiple target levels are detected, the preset event to be adjusted with higher priority can still be used as the target event to be adjusted.

[0066] Combination Figures 3 to 5 As an example, the first unit cycle in the feedback cycle T corresponds to the undervoltage event, the second unit cycle corresponds to the overvoltage event, the third unit cycle corresponds to the overtemperature event, the fourth unit cycle corresponds to the short circuit event, and the fifth unit cycle corresponds to the open circuit event.

[0067] exist Figure 3 In the feedback signal 1, the target level includes the target level segment LA corresponding to the first unit period T1, the target level segment LD corresponding to the fourth unit period T4, and the target level segment LE corresponding to the fifth unit period T5. The first target level segment is LA. The starting time point of the first target level segment, i.e., the starting time point t1 of the target level LA, is obtained. Therefore, the first unit period T1 corresponding to the starting time point t1 can be used as the target unit period.

[0068] Figure 4 The diagram shows the feedback signal monitored during the feedback period. Figure 2 ,exist Figure 4 In the feedback signal 2, the target level includes the target level segment LB corresponding to the second unit period T2 and the target level segment LE corresponding to the fifth unit period T5. The first target level segment is LB. The starting time point of the first target level segment is obtained, which is the starting time point t4 of the target level LB. Then, the second unit period T2 corresponding to the starting time point t4 can be used as the target unit period.

[0069] Figure 5 The diagram shows the feedback signal monitored during the feedback period. Figure 3 ,exist Figure 5In the feedback signal 3, the target level includes the target level segment LC corresponding to the third unit period T3 and the target level segment LD corresponding to the fourth unit period T4. The first target level segment is LC. The starting time point of the first target level segment is obtained, which is the starting time point t5 of the target level LC. Then, the third unit period T3 corresponding to the starting time point t5 can be used as the target unit period.

[0070] 130: Use the preset event to be adjusted corresponding to the target unit period as the target event to be adjusted.

[0071] In 130, the target event to be adjusted is a proper subset of the preset events to be adjusted.

[0072] In this embodiment, since each unit period in the preset feedback cycle corresponds to a preset event to be adjusted, once the target unit period is determined, the target event to be adjusted can be determined based on the correspondence between the unit period and the preset event to be adjusted.

[0073] In practical implementation, a relationship list between unit cycles and preset event identifiers to be adjusted can be configured in the LED control unit. This list describes the correspondence between each unit cycle and each event identifier to be adjusted. Once the target unit cycle is determined, the target event to be adjusted can be identified by querying this relationship list.

[0074] For example, in practical applications, a host computer can be used to establish communication with the LED control unit. When the LED control unit determines the target event to be adjusted, it can send the identification information of the target event to the host computer for aggregation. Alternatively, the LED control unit can display the identification information of the target event on the screen to improve screen testing efficiency.

[0075] As an example, when the target event to be regulated is an undervoltage event, an overvoltage event, or an overtemperature event, the method may further include a step parallel to step 130: obtaining the duration of the target level in the feedback signal; obtaining event data of the target event to be regulated based on the duration of the target level; and using the event data to describe the severity of the target event to be regulated.

[0076] In this embodiment, the duration of the target level is positively correlated with the severity of the fault.

[0077] In practical implementation, a data mapping table corresponding to different events to be adjusted can be configured in the LED control unit, and the data mapping table can be used to describe the correspondence between the duration of the target level and the event data.

[0078] When the LED control unit detects a feedback signal, it determines the target unit cycle by acquiring the start time of the target level. After determining the target event to be adjusted based on the target unit cycle, it can determine the corresponding event data from the corresponding data mapping table based on the duration of the target level. The severity of the target event to be adjusted is described or indicated by the event data.

[0079] For example, assume that the duration of each unit cycle in the feedback period T is the duration of an 8-bit communication bus, and the duration of a 1-bit communication bus is 30 milliseconds. When all LED modules are working normally, the signal monitored within the feedback period T is at a high level by default, meaning that no target level is generated.

[0080] by Figure 3 The feedback signal monitored during the feedback period is shown in the diagram. Figure 1 For example, the first unit period T1 corresponding to the target level LA is the target unit period, and the target event to be adjusted corresponding to this target unit period T1 is an undervoltage event. Assuming the duration of the target level LA is the duration of a 3-bit communication bus, it can be represented as an undervoltage of 3V.

[0081] It is easy to understand that, in Figure 3 In the process, the fourth unit period T4 and the fifth unit period T5 also correspond to target levels, indicating that an LED chip in the LED driver circuit has detected a short-circuit event requiring adjustment in the LED module. Since the detectable voltage of the LED module to ground is high when the LED module is short-circuited, and zero when the LED module is open-circuited, it is possible to distinguish between short-circuit and open-circuit events requiring adjustment based on the voltage of the LED module to ground.

[0082] by Figure 4 The feedback signal monitored during the feedback period is shown in the diagram. Figure 2 For example, the second unit period T2 corresponding to the target level LB is the target unit period, and the target event to be regulated corresponding to this target unit period T2 is an overvoltage event. Assuming the duration of the target level LB is the duration of a 4-bit communication bus, it can represent an overvoltage of 4V.

[0083] by Figure 5 The feedback signal monitored during the feedback period is shown in the diagram. Figure 3 For example, the third unit period T3 corresponding to the target level LC is the target unit period, and the target event to be adjusted corresponding to this target unit period T3 is an over-temperature event. Assuming the duration of the target level LC is the duration of a 5-bit communication bus, it can represent an over-temperature of 5°C.

[0084] Based on the above embodiments, as one example, the LED control unit is also connected to an LED power supply, which provides the operating voltage. After step 130, the following may also be included:

[0085] Based on event data, the output voltage of the LED power supply is controlled according to a preset voltage control strategy.

[0086] In this embodiment, since event data can be used to describe the severity of the target event to be adjusted, different response strategies corresponding to different event data can be pre-configured in the LED control unit. That is, the event data is divided into ranges and levels, with different response strategies corresponding to different levels of event data. The voltage control strategy refers to the method by which the LED control unit controls the voltage driving the LED module.

[0087] It is easy to understand that in this embodiment, since the target event to be adjusted is an undervoltage event, an overvoltage event, or an overtemperature event, the undervoltage event and the overvoltage event are both related to voltage, and when the temperature is too high, the temperature can also be reduced by controlling the operating voltage.

[0088] It should be noted that since the voltage control strategy refers to the method by which the LED control unit controls the voltage of the LED module, the corresponding voltage control method can be adapted according to the event data in the specific implementation.

[0089] For example, if the event data is undervoltage data, such as undervoltage of 5V, a corresponding boost control strategy can be adapted to control the output voltage of the LED power supply in order to eliminate the undervoltage event.

[0090] For example, if the event data is undervoltage data, such as overvoltage of 3V, a corresponding buck control strategy can be adapted to control the output voltage of the LED power supply in order to eliminate the overvoltage event.

[0091] Similarly, for example, when the event data is over-temperature data, such as over-temperature by 5°C, a corresponding buck control strategy can be adapted to control the output voltage of the LED power supply in order to eliminate the over-temperature event.

[0092] In this embodiment, control strategies can be selected more precisely based on event data. For example, a preset voltage control strategy can be divided into different levels according to different target events to be regulated, so as to eliminate the target events to be regulated within the shortest adjustment period.

[0093] As one embodiment, the LED control unit is also connected to an LED power supply, which provides the operating voltage. When the target event to be regulated is a short-circuit event or an open-circuit event, after step 130, the following may also be included:

[0094] Based on the current temperature information, the output voltage of the LED power supply is controlled according to the preset temperature control strategy.

[0095] In this embodiment, when the target event to be adjusted is a short-circuit event or an open-circuit event, it is necessary to pay attention to the temperature information of the LED module. By detecting the current temperature information of the LED module and controlling the output voltage of the LED power supply according to the preset temperature control strategy, the LED module can be prevented from being burned out. Here, the preset temperature control strategy can be understood as the temperature control strategy of the LED module. For example, if the current temperature is higher than a first threshold, the output voltage of the LED power supply can be reduced by Δt1; if the current temperature is higher than a second threshold, the output voltage of the LED power supply can be reduced by Δt2, wherein the second threshold is greater than the first threshold, and Δt2 is greater than Δt1.

[0096] In this embodiment, the output voltage of the LED power supply is controlled according to the current temperature information and a preset temperature control strategy. This allows for rapid control of the LED power supply output, ensuring that the LED module operates within a safe temperature range and preventing the LED module from being burned out due to events requiring adjustment.

[0097] Please see Figure 6 , Figure 6 This is a flowchart illustrating the implementation of an LED adjustment event detection method according to another embodiment of this application. Figure 2 Compared to the corresponding embodiments, Figure 6 The illustrated LED event detection method for adjustment further includes steps 210 to 220 before step 110. For example... Figure 6 As shown, specifically:

[0098] 210: Send brightness control information to each driver chip in the LED driver circuit.

[0099] In step 210, the brightness control information is used to instruct the driver chip to control the operating current of the LED.

[0100] In this embodiment, when the screen is displaying an image, the LED control unit generates a brightness control signal based on the image content and sends the brightness control signal to each driver chip in the LED driver circuit via the communication bus. Since the LED power supply provides operating power to the first terminal of the LED module, the driver chip can control the voltage at the second terminal of the LED module to achieve constant current driving of the LED module. Therefore, the driver chip can control the voltage at the second terminal of the LED module according to the brightness control information, so that the LED operating current of the LED module is equal to the operating current indicated by the brightness control information.

[0101] 220: Send status feedback commands to the LED driver circuit.

[0102] In step 220, the status feedback instruction is used to instruct the driver chip to send a feedback signal to the control unit within a preset feedback period when it detects a preset event to be adjusted.

[0103] In this embodiment, after the LED control unit sends a feedback command to the LED driving circuit, it releases access to the communication bus. Here, since the feedback command is used to instruct all driving chips in the LED driving circuit to feed back the feedback signal corresponding to the preset adjustable event detected within a preset feedback period after driving the LED module according to the brightness control signal, the LED control unit can immediately execute step 110 after executing step 220.

[0104] The above solution, by sending brightness control information to each driver chip in the LED driver circuit and then sending a status feedback command to the LED driver circuit, can instruct the driver chips in the LED driver circuit to respond to the feedback command after driving the LED module according to the brightness control information, so as to send the detected feedback signal to the LED control unit within a preset feedback period, thus providing a basis for LED fault detection.

[0105] Please see Figure 7 , Figure 7 This is a structural block diagram of an LED event detection device provided in an embodiment of this application. In this embodiment, the LED event detection device includes units used for performing... Figure 2 and Figure 6 The steps in the corresponding embodiments. Please refer to the details. Figure 2 and Figure 6 ,as well as Figure 2 and Figure 6 The relevant descriptions in the corresponding embodiments are shown below. For ease of explanation, only the parts relevant to this embodiment are shown. See also... Figure 7 An LED fault detection device is applied to an LED control unit, which is connected to an LED driver circuit. The LED driver circuit includes multiple driver chips. The device includes a monitoring unit 401, a first execution unit 402, and a second execution unit 403. Specifically:

[0106] The monitoring unit 401 is used to monitor the feedback signal sent by the LED driving circuit within a preset feedback period. The feedback signal is a signal sent by any driving chip in the LED driving circuit to the LED control unit through the communication bus when a preset event to be adjusted is detected. The feedback period includes multiple unit periods, and each unit period corresponds to a preset event to be adjusted.

[0107] The first execution unit 402 is used to determine the target unit period based on the time information of the feedback signal.

[0108] The second execution unit 403 is used to take the preset event to be adjusted corresponding to the target unit cycle as the target event to be adjusted.

[0109] As one embodiment, the LED adjustment event detection device further includes:

[0110] The first transmitting unit is used to send brightness control information to each driver chip in the LED driver circuit; the brightness control information is used to instruct the driver chip to control the operating current of the LED.

[0111] The second sending unit is used to send a status feedback command to the LED driving circuit; the status feedback command is used to instruct the driving chip to send a feedback signal to the control unit within a preset feedback period when it detects a preset event to be adjusted.

[0112] It should be understood that in the LED adjustment event detection device provided in this embodiment, each unit is used to perform... Figure 2 and Figure 6 The steps in the corresponding embodiments, and for Figure 2 and Figure 6 The steps in the corresponding embodiments have been explained in detail in the above embodiments. Please refer to them for details. Figure 2 and Figure 6 ,as well as Figure 2 and Figure 6 The relevant descriptions in the corresponding embodiments will not be repeated here.

[0113] Figure 8 This is a structural block diagram of an electronic device provided in an embodiment of this application. For example... Figure 8 As shown, the electronic device 5 of this embodiment includes: a processor 50, a memory 51, and a computer program 52 stored in the memory 51 and executable on the processor 50, such as a program for an LED fault detection method. When the processor 50 executes the computer program 52, it implements the steps of each embodiment of the above-described LED fault detection method, for example... Figure 2 and Figure 6 The steps shown. Alternatively, the processor 50 may implement the above when executing the computer program 52. Figure 8 The functions of each unit in the corresponding embodiments are described. Please refer to the following for details. Figure 8 The relevant descriptions in the corresponding embodiments are not repeated here.

[0114] For example, the computer program 52 may be divided into one or more units, which are stored in the memory 51 and executed by the processor 50 to complete this application. The one or more units may be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of the computer program 52 in the electronic device 5. For example, the computer program 52 may be divided into a monitoring unit, a first execution unit, and a second execution unit, each with its specific functions as described above.

[0115] The electronic device may include, but is not limited to, a processor 50 and a memory 51. Those skilled in the art will understand that... Figure 8 This is merely an example of electronic device 5 and does not constitute a limitation on electronic device 5. It may include more or fewer components than shown, or combine certain components, or different components. For example, the electronic device may also include input / output devices, network access devices, buses, etc.

[0116] The processor 50 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0117] The memory 51 can be an internal storage unit of the electronic device 5, such as a hard disk or memory of the electronic device 5. The memory 51 can also be an external storage device of the electronic device 5, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the electronic device 5. Furthermore, the memory 51 can include both internal and external storage units of the electronic device 5. The memory 51 is used to store the computer program and other programs and data required by the electronic device. The memory 51 can also be used to temporarily store data that has been output or will be output.

[0118] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for detecting LED adjustment events, characterized in that, Applied to an LED control unit, wherein the LED control unit is connected to an LED driving circuit, and the LED driving circuit includes multiple driving chips, the method includes: Within a preset feedback period, the feedback signal sent by the LED driving circuit is monitored; the feedback signal is a signal sent by any of the driving chips in the LED driving circuit to the LED control unit via a communication bus when a preset adjustment event is detected; the feedback period includes multiple unit periods, and each unit period corresponds to a preset adjustment event. The target unit period is determined based on the time information of the feedback signal; The preset event to be adjusted corresponding to the target unit period is taken as the target event to be adjusted. Wherein, when the target event to be regulated is an undervoltage event, an overvoltage event, or an overtemperature event, the method further includes: Obtain the duration of the target level in the feedback signal; Based on the duration of the target level, event data of the target event to be regulated is obtained; the event data is used to describe the severity of the target event to be regulated.

2. The method according to claim 1, characterized in that, The feedback signal includes the target level; Determining the target unit period based on the time information of the feedback signal includes: Obtain the start time point of the target level in the feedback signal; The unit period corresponding to the starting time point is taken as the target unit period.

3. The method according to claim 2, characterized in that, The preset events to be adjusted include at least: undervoltage event, overvoltage event, overtemperature event, short circuit event, and open circuit event.

4. The method according to claim 1, characterized in that, The LED control unit is also connected to an LED power supply, which provides the operating voltage. After the step of taking the preset event to be adjusted corresponding to the target unit period as the target event to be adjusted, the method further includes: Based on the event data, the output voltage of the LED power supply is controlled according to a preset voltage control strategy.

5. The method according to claim 3, characterized in that, The LED control unit is also connected to an LED power supply, which provides the operating voltage. When the target event to be adjusted is the short-circuit event or the open-circuit event, the method further includes: Based on the current temperature information, the output voltage of the LED power supply is controlled according to a preset temperature control strategy.

6. The method according to any one of claims 1 to 5, characterized in that, Before the step of monitoring the feedback signal sent by the LED driving circuit within a preset feedback period, the method further includes: Brightness control information is sent to each of the driver chips in the LED driver circuit; the brightness control information is used to instruct the driver chip to control the operating current of the LED. A status feedback instruction is sent to the LED driving circuit; wherein the status feedback instruction is used to instruct the driving chip to send a feedback signal to the control unit within a preset feedback period when a preset event to be adjusted is detected.

7. An LED event detection device, characterized in that, An application in an LED control unit, wherein the LED control unit is connected to an LED driving circuit, and the LED driving circuit includes multiple driving chips, the device includes: A monitoring unit is used to monitor the feedback signal sent by the LED driving circuit within a preset feedback period; the feedback signal is a signal sent by any one of the driving chips in the LED driving circuit to the LED control unit through a communication bus when a preset adjustment event is detected; the feedback period includes multiple unit periods, and each unit period corresponds to a preset adjustment event; The first execution unit is used to determine the target unit period based on the time information of the feedback signal; The second execution unit is used to take the preset event to be adjusted corresponding to the target unit period as the target event to be adjusted. Wherein, when the target event to be regulated is an undervoltage event, an overvoltage event, or an overtemperature event, the device is further configured to: Obtain the duration of the target level in the feedback signal; Based on the duration of the target level, event data of the target event to be regulated is obtained; the event data is used to describe the severity of the target event to be regulated.

8. An electronic device, characterized in that, The electronic device includes: a memory, a processor, and a computer program stored in the memory and executable on the electronic device, wherein the processor executes the computer program to implement the steps of the LED adjustment event detection method as described in any one of claims 1 to 6.

9. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the LED adjustment event detection method as described in any one of claims 1 to 6.

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