阅读说明：本技术 区域控光电路自检复位方法及系统 (Self-checking reset method and system for area light control circuit ) 是由 夏善语 凌斌 胡锋 郑浩 于 2021-09-30 设计创作，主要内容包括：本发明提供了一种区域控光电路自检复位方法及系统,涉及显示技术领域其包括自检、故障复位和反复复位报错,可以在启动时通过总控制器完成自检,在区域控光电路存在故障时,通过背光从控制器和背光主控制器识别第一故障信号和第二故障信号并将第一故障信号和第二故障信号发送至总控制器,总控制器根据第一故障信号和第二故障信号进行不同的处理,当总控制器反复接收到第一故障信号和第二故障信号时,还可以进行报错。本发明不仅可以在启动时完成自检,还可以对区域控光电路的故障进行修复以及报错。(The invention provides a self-checking reset method and a system of a regional light control circuit, which relate to the technical field of display and comprise self-checking, fault reset and repeated reset error reporting. The invention can not only complete self-checking when starting, but also repair the fault of the regional light control circuit and report the error.)

1. A self-checking reset method of a regional light control circuit, wherein the regional light control circuit comprises an LED unit, a backlight slave controller, a backlight master controller and a master controller, and is characterized by comprising the following steps:

s1, self-checking;

s11, if the master controller receives a starting instruction, starting self-checking, and controlling the backlight master controller to initialize the backlight slave controller;

s12, if the master controller completes self-checking, sending a starting instruction to the backlight master controller to enable the backlight master controller to control the LED unit to normally work through the backlight slave controller;

s2, resetting the fault;

s21, if the backlight slave controller detects that an LED circuit in the LED unit fails, sending the first failure signal to the backlight master controller;

s22, if the backlight main controller receives the first fault signal, the first fault signal is sent to the master controller;

s23, if the master controller receives the first fault signal, closing a channel of the LED circuit according to the first fault signal;

s24, if the backlight master controller detects that the backlight slave controller fails, sending a second failure signal to the master controller;

s25, if the master controller detects that the backlight main controller fails or receives the second fault signal, executing a reset operation;

s3, repeatedly resetting and reporting errors;

s31, if the number of times that the master controller receives the first fault signal is larger than a first preset number of times, reporting an error through a display screen;

and S32, if the number of times that the master controller receives the second fault signal or the number of times that the main backlight controller is detected to have faults is larger than a second preset number of times, reporting errors through the display screen.

2. The area-controlled light circuit self-test resetting method of claim 1, wherein the step of sending the first failure signal to the backlight master controller if the backlight slave controller detects that there is a failure of an LED circuit in the LED unit comprises:

confirming that a failed LED circuit exists in the LED unit, and identifying a first failure type of the LED circuit;

confirming a first fault code corresponding to the first fault type according to a first preset fault code library;

and generating the first fault signal according to the first fault code, and sending the first fault signal to the backlight main controller.

3. The self-checking reset method of the local-control optical circuit according to claim 2, wherein if the number of times that the master controller receives the first failure signal is greater than a first preset number of times, the step of reporting an error through a display screen includes:

judging whether the frequency of receiving the first fault signal is greater than the first preset frequency or not;

and if the number of times of receiving the first fault signal is greater than the first preset number of times, outputting the first fault code to the display screen to remind a user of the first fault type of the LED circuit with the fault.

4. The self-test resetting method of the area-controlled optical circuit as claimed in claim 1, wherein the step of sending the second failure signal to the master controller if the backlight master controller detects that the backlight slave controller fails comprises:

if the fact that the backlight slave controller has faults is detected, initializing and restarting the backlight slave controller;

if the failure of the backlight slave controller is continuously detected, confirming the frequency of the continuous detection of the failure of the backlight slave controller;

if the number of times of continuously detecting that the backlight slave controller fails is larger than a third preset number of times, generating a second failure signal;

and sending the second fault signal to the master controller.

5. The area-controlled optical circuit self-test reset method of claim 4, wherein the step of generating the second fault signal comprises:

identifying a second fault type of the backlight slave controller, and confirming a second fault code corresponding to the second fault type according to a second preset fault code table;

generating the second fault signal according to the second fault code.

6. The self-test resetting method of the area-controlled optical circuit as claimed in claim 5, wherein if the number of times that the master controller receives the second failure signal or the number of times that the master backlight controller detects that the backlight main controller fails is greater than a second preset number, the step of reporting an error through the display screen further comprises:

judging whether the number of times of receiving the second fault signal and the number of times of detecting that the backlight main controller has faults are greater than a second preset number of times or not;

and if the number of times of receiving the second fault signal or the number of times of detecting the fault of the backlight main controller is greater than the second preset number of times, generating alarm information, and outputting the second fault code and the alarm information to the display screen.

7. The self-test resetting method of the area-controlled optical circuit as claimed in claim 1, wherein said step of sending a power-on command to the backlight master controller to make the backlight master controller control the normal operation of the LED units through the backlight slave controller if the master controller completes the self-test comprises:

the master controller judges whether self-checking is finished or not;

if the master controller completes self-checking, sending the starting instruction to the backlight master controller;

if the backlight master controller receives the starting-up instruction, the starting-up instruction is sent to the backlight slave controller;

and if the backlight controller receives the starting-up instruction, starting the LED unit to enable the LED unit to start working.

8. A self-checking reset system of a regional light control circuit is characterized by comprising a master controller, a backlight master controller, a plurality of backlight slave controllers and an LED unit;

the backlight slave controller is used for connecting the LED unit, detecting whether the LED unit has a fault or not, and sending a first fault signal to the backlight master controller when the LED unit has the fault, wherein the LED unit comprises at least one LED circuit;

the backlight master controller is connected with the backlight slave controller and used for detecting whether the backlight slave controller has a fault or not and sending a second fault signal to the backlight master controller when the backlight slave controller has the fault, and the backlight master controller is also used for receiving the first fault signal and sending the first fault signal to the master controller;

the master controller is connected with the backlight main controller and used for detecting whether the backlight main controller has a fault, receiving the first fault signal and the second fault signal, and executing reset operation when the backlight main controller has a fault or receives the second fault signal, and the master controller is also used for closing the channel of the LED unit according to the first fault signal.

9. The area-controlled light circuit self-test reset system according to claim 8, wherein a plurality of the backlight slave controllers are connected in series, and an input terminal of a first one of the backlight slave controllers is connected to an output terminal of the backlight master controller, and an output terminal of a last one of the backlight slave controllers is connected to an input terminal of the backlight master controller.

10. The area-controlled optical circuit self-checking reset system according to claim 8, further comprising a signal display unit and a WIFI module, wherein the signal display unit is connected to the main controller and the display screen of the display device respectively, and the WIFI module is connected to the main controller.

Technical Field

The invention relates to the technical field of display, in particular to a self-checking reset method and a self-checking reset system for a regional light control circuit.

Background

With the change of science and technology, the living standard of people is continuously improved, the requirements of people on display screens are higher and higher, and words such as high definition and bright color become important conditions for people to judge the performance of a television.

In order to ensure that the backlight system can work stably, a detection circuit is generally arranged to detect whether the backlight system has faults or detect and repair the programmed faults of the backlight system by means of a driving chip, but the arrangement of the detection circuit needs to be adjusted adaptively according to the backlight systems of different display devices, and different faults also need different detection circuits according to the same backlight system, so that the cost is high, and the driving chip can only detect and repair the programmed faults of the backlight system and cannot detect other faults.

In addition, in some circuits, a detection voltage is obtained by adopting a voltage division resistor mode for a power supply voltage of a backlight system, and a mechanism that the detection voltage meets a trigger condition is obtained by comparing a comparator with a reference voltage. The mode of judging through the analog circuit needs to add an I/O port in a singlechip and also needs peripheral resistance and capacitance for detection. When matching different voltage schemes, its peripheral hardware also needs to be modified.

Disclosure of Invention

The embodiment of the invention provides a self-checking reset method and a self-checking reset system for a regional light control circuit, which can not only carry out self-checking when a computer is started, but also repair the fault of the regional light control circuit and carry out error reporting.

In a first aspect, an embodiment of the present invention provides a self-checking reset method for a local light-controlling circuit, where the local light-controlling circuit includes an LED unit, a backlight slave controller, a backlight master controller, and a master controller, and includes the following steps:

s1, self-checking;

s11, if the master controller receives a starting instruction, starting self-checking, and controlling the backlight master controller to initialize the backlight slave controller;

s12, if the master controller completes self-checking, sending a starting instruction to the backlight master controller to enable the backlight master controller to control the LED unit to normally work through the backlight slave controller;

s2, resetting the fault;

s21, if the backlight slave controller detects that an LED circuit in the LED unit fails, sending the first failure signal to the backlight master controller;

s22, if the backlight main controller receives the first fault signal, the first fault signal is sent to the master controller;

s23, if the master controller receives the first fault signal, closing a channel of the LED circuit according to the first fault signal;

s24, if the backlight master controller detects that the backlight slave controller fails, sending a second failure signal to the master controller;

s25, if the master controller detects that the backlight main controller fails or receives the second fault signal, executing a reset operation;

s3, repeatedly resetting and reporting errors;

s31, if the number of times that the master controller receives the first fault signal is larger than a first preset number of times, reporting an error through a display screen;

and S32, if the number of times that the master controller receives the second fault signal or the number of times that the main backlight controller is detected to have faults is larger than a second preset number of times, reporting errors through the display screen.

In a second aspect, an embodiment of the present invention further provides a local light-controlling circuit self-test resetting system, where the local light-controlling circuit self-test resetting system includes a master controller, a backlight master controller, and multiple backlight slave controllers; the backlight slave controller is used for connecting an LED unit of display equipment, detecting whether the LED unit has a fault or not, and sending a first fault signal to the backlight master controller when the LED unit has the fault, wherein the LED unit comprises at least one LED circuit; the backlight master controller is connected with the backlight slave controller and used for detecting whether the backlight slave controller has a fault or not and sending a second fault signal to the backlight master controller when the backlight slave controller has the fault, and the backlight master controller is also used for receiving the first fault signal and sending the first fault signal to the master controller; the master controller is connected with the backlight main controller and used for detecting whether the backlight main controller has a fault, receiving the first fault signal and the second fault signal, and executing reset operation when the backlight main controller has a fault or receives the second fault signal, and the master controller is also used for closing the channel of the LED unit according to the first fault signal.

Furthermore, the plurality of backlight slave controllers are connected in series, the input end of the first backlight slave controller of the plurality of backlight slave controllers is connected with the output end of the backlight master controller, and the output end of the last backlight slave controller of the plurality of backlight slave controllers is connected with the input end of the backlight master controller.

Furthermore, the intelligent control system further comprises a signal display unit and a WIFI module, wherein the signal display unit is respectively connected with the master controller and the display screen of the display device, and the WIFI module is connected with the master controller.

The method and the system for self-checking and resetting the area light-controlling circuit provided by the embodiment of the invention can carry out self-checking when the master controller is started, initialize the backlight slave controller to ensure that the area light-controlling circuit can normally operate, detect whether the LED circuit in the LED unit has a fault or not through the backlight slave controller after the area light-controlling circuit normally works, find the fault of the LED circuit in time and send a first fault signal to the backlight master controller when the LED circuit has the fault, on one hand, the backlight master controller is used for receiving the first fault signal, on the other hand, the backlight slave controller is used for detecting whether the backlight slave controller has the fault or not, and send a second fault signal to the master controller when the backlight slave controller has the fault, on the other hand, the master controller is used for receiving the first fault signal and closing the channel of the corresponding LED circuit according to the first fault signal, and on the other hand, the backlight control circuit is used for receiving the second fault signal, resetting according to the second fault signal, detecting whether the backlight main controller has a fault or not, and resetting when the backlight main controller has the fault, so that the fault of the area light control circuit can be automatically repaired without arranging a detection circuit.

Through the backlight main controller, after the backlight sub-controller or the LED units controlled by the backlight sub-controller have faults, the backlight main controller is used as an intermediate bridge to report error codes to the main controller, so that the system can be automatically repaired or fault facts are prompted to a user.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic flowchart of a self-test reset method of a local light-control circuit according to an embodiment of the present invention;

fig. 2 is a self-test flowchart of a self-test reset method of a local light-controlling circuit according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a self-test reset system of an area light-control circuit according to an embodiment of the present invention;

FIG. 4 is a flowchart illustrating the operation of the self-test reset system of the area-controlled optical circuit according to an embodiment of the present invention;

fig. 5 is a diagram showing a repeated failure picture of the local light-controlling circuit self-test reset system according to the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

Referring to fig. 1, fig. 1 is a schematic flow chart of a self-test reset system of a local light-controlling circuit according to an embodiment of the present invention. The self-checking reset method of the regional light control circuit can automatically reset to repair the fault when the regional light control circuit has the fault. As shown in FIG. 1, the method includes steps S1-S3.

And S1, self-checking.

In the embodiment of the present invention, when the display device is just powered on and enters the normal operation mode or the factory mode, the main controller starts self-checking, the self-checking process is as shown in fig. 2, the main controller controls the backlight main controller to perform self-checking, the backlight main controller controls the backlight sub-controller to perform self-checking, and after the self-checking is completed, the backlight sub-controller returns data to the backlight main controller, and the backlight main controller returns data to the main controller, so that the main controller can conveniently judge whether the whole area light control circuit has a fault.

And S11, if the master controller receives a starting instruction, starting to perform self-checking, and controlling the backlight master controller to initialize the backlight slave controller.

In the embodiment of the invention, when the master controller receives the starting instruction, self-checking is started, and the backlight master controller is controlled to initialize the backlight slave controller so as to ensure that the backlight slave controller can normally work.

And S12, if the master controller completes self-checking, sending a starting instruction to the backlight master controller to enable the backlight master controller to control the LED unit to normally work through the backlight slave controller.

In the embodiment of the invention, after the master controller completes self-checking, the master controller sends a power-on instruction to the backlight master controller, and the backlight master controller controls the backlight slave controller to start after receiving the power-on instruction and controls the LED unit to start through the backlight slave controller.

In some embodiments, for example, in this embodiment, the step S12 may include the following steps: the master controller judges whether self-checking is finished or not; if the master controller completes self-checking, sending the starting instruction to the backlight master controller; if the backlight master controller receives the starting-up instruction, the starting-up instruction is sent to the backlight slave controller; and if the backlight controller receives the starting-up instruction, starting the LED unit to enable the LED unit to start working.

In the embodiment of the invention, after the master controller starts to perform self-test, whether the self-test is completed or not is judged, when the self-test is completed, a startup data packet is generated and sent to the backlight master controller to realize sending of a startup instruction, the backlight master controller sends the startup data packet to the backlight slave controller after receiving the startup data packet, and the backlight slave controller controls the conduction of the LED unit after receiving the startup data packet, so that the LED unit starts to work.

S2, fault reset.

In the embodiment of the invention, after the main controller finishes self-checking, the display equipment enters normal work, the main controller, the backlight main controller and the backlight slave controller can detect whether the regional light control circuit has faults according to a preset period (self-checking period), and when the faults are detected, the regional light control circuit can be repaired and reset.

S21, if the backlight slave controller detects that there is a failure of the LED circuit in the LED unit, sending the first failure signal to the backlight master controller.

In the embodiment of the present invention, the LED unit includes at least one LED circuit, the number of the LED circuits is determined by the attribute of the backlight slave controller, and generally, an 8-bit backlight slave controller can be connected to 16 LED circuits at most. The backlight slave controller is used for detecting whether faults such as short circuit or open circuit occur in the connected LED circuit. The number of the backlight slave controllers can be multiple, the connection mode between the backlight master controller and the multiple backlight slave controllers can be a daisy-chain connection mode, taking one backlight master controller and two backlight slave controllers as an example, the backlight master controller is connected to a first backlight slave controller, the first backlight slave controller is connected to a second backlight slave controller, and the second backlight slave controller is connected to the backlight master controller. The backlight slave controller can be a single chip microcomputer, and the single chip microcomputer can be one of an 8-bit single chip microcomputer, a 16-bit single chip microcomputer or a 32-bit single chip microcomputer according to different displays. Meanwhile, fault codes can be manufactured according to data in a register of the single chip microcomputer, different data correspond to different fault codes, different fault codes correspond to different fault types, and therefore the fault codes can be transmitted to the master controller so that workers can confirm the fault types conveniently. When the backlight slave controller detects that the LED circuit fails, the first fault signal is sent to the backlight master controller, so that the backlight master controller is reminded of the LED circuit failure. Meanwhile, the backlight controller also processes the LED circuit according to the failure of the LED circuit, for example, turning off the failed LED circuit.

In some embodiments, for example, in this embodiment, the step S21 may include the following steps: confirming that a failed LED circuit exists in the LED unit, and identifying a first failure type of the LED circuit; confirming a first fault code corresponding to the first fault type according to a first preset fault code library; and generating the first fault signal according to the first fault code, and sending the first fault signal to the backlight main controller.

In the embodiment of the invention, common faults of the LED circuit include open circuit, short circuit or faults with lower power supply voltage, and different first fault types can be corresponding to different first fault codes. For example, taking an 8-bit single-chip microcomputer as an example, if one of the registers in the 8-bit single-chip microcomputer is used to store a first fault code, for example, a 0x02 register, 255 different first fault codes may be set, corresponding to different fault types in 255, for example, 00000010 corresponds to a short circuit, and 01000000 corresponds to an open circuit. When the LED circuit is detected to be in fault, the first fault code can be confirmed according to the first fault type, if a plurality of LED circuits are in fault, the LED circuits can be confirmed firstly, then the first fault types of different LED circuits are confirmed, and finally the first fault code is confirmed. After the first fault code is confirmed, a first fault signal is generated and sent to the backlight main controller, for example, the first fault code is 00000010, and the data is sent to the backlight main controller as the first fault signal.

And S22, if the backlight main controller receives the first fault signal, sending the first fault signal to the master controller.

In the embodiment of the invention, after the backlight main controller receives the first fault signal, the first fault signal is sent to the master controller.

And S23, if the master controller receives the first fault signal, closing the channel of the LED circuit according to the first fault signal.

In the embodiment of the invention, after receiving a first fault signal sent by a backlight main controller, a master controller closes a channel of a failed LED circuit according to the first fault signal, thereby protecting the whole circuit.

And S24, if the master backlight controller detects that the slave backlight controller fails, sending the second failure signal to the master controller.

In the embodiment of the present invention, there is usually one backlight master controller for managing the backlight slave controllers, and a plurality of backlight slave controllers may be provided according to the actual requirements of the display, spi (serial Peripheral interfaces) communication protocols are adopted for communication between the backlight master controller and the backlight slave controllers and between the backlight slave controllers, and the connection between the backlight master controller and the backlight slave controllers may be a conventional connection mode, that is, the backlight master controller is connected with all the backlight slave controllers respectively, or a daisy connection is adopted, that is, the backlight master controller and the backlight slave controllers are connected in series, and data is transmitted between the backlight slave controllers step by step. The backlight master controller detects whether the connected backlight slave controller has non-destructive faults such as power failure and the like in real time, and is convenient for timely processing the faults. When the backlight slave controller fails, the backlight master controller can generate a second failure signal to the master controller according to the failure type of the backlight slave controller. When a plurality of backlight slave controllers are connected to the backlight master controller, a faulty backlight slave controller can be identified. For example, when the backlight master controller detects that the data returned by the backlight slave controller MISO are all "0", it indicates that the backlight slave controller has a power-down fault.

In some embodiments, for example, in this embodiment, the step S24 may include the following steps: if the fact that the backlight slave controller has faults is detected, initializing and restarting the backlight slave controller; if the failure of the backlight slave controller is continuously detected, confirming the frequency of the continuous detection of the failure of the backlight slave controller; if the number of times of continuously detecting that the backlight slave controller fails is larger than a third preset number of times, generating a second failure signal; sending the second fault signal to the master controller

In the embodiment of the present invention, when the backlight master controller detects that one or more of the backlight slave controllers fails, the failed backlight slave controller may be initialized first, and then the failed backlight slave controller may be restarted to repair the failure of the backlight slave controller. In general, when a non-destructive fault such as power failure occurs in the backlight slave controller, the backlight slave controller can be repaired through initialization and restart, so that the backlight slave controller can recover the fault. The detection of the backlight slave controller by the backlight master controller is generally real-time, the continuous detection of the same backlight slave controller failing means that the detection of the backlight slave controller is displayed as a failure every time, and when the backlight slave controller is detected to be normal once, the times are recalculated. And after the failed backlight slave controller is repaired, if the repaired backlight slave controller is still detected to have the failure, the initialization and restarting actions are repeated, and when the repaired backlight slave controller is continuously detected for multiple times, the continuously detected times are confirmed so as to conveniently judge whether the failure needs to be reported to the master controller. When the number of times of continuously detecting that the backlight slave controller fails is greater than a third preset number of times, the third preset number of times may be designated by a user, and a second failure signal is generated. For example, when the preset number of times is 5 times and the same backlight controller is detected to be out of order 6 times consecutively, the second failure signal is generated.

In some embodiments, for example, in this embodiment, the step of generating the second fault signal may include: identifying a second fault type of the backlight slave controller, and confirming a second fault code corresponding to the second fault type according to a second preset fault code table; generating the second fault signal according to the second fault code.

In the embodiment of the present invention, an 8-bit single chip microcomputer is taken as an example for explanation, a 0x01 register in the backlight main controller may be used to store fault codes, 255 fault codes may be recorded, and if 255 codes are insufficient to record all the second fault types, a 0x02 register may be added to store a second fault code, and 65535 second fault codes may be recorded. And when the backlight master controller continuously detects that the backlight slave controller fails for multiple times, identifying a second failure type of the backlight slave controller, confirming a corresponding second failure code in a second preset failure code table, and finally generating a second failure signal according to the second failure code.

And S25, if the master controller detects that the backlight main controller has a fault or receives the second fault signal, executing a reset operation.

In the embodiment of the invention, the master controller is used for detecting whether the backlight main controller fails or not and receiving a first failure signal. Meanwhile, when the equipment starts, the master controller can also carry out self-checking, and controls the backlight master controller to initialize the backlight slave controller, after the master controller completes the self-checking, the master controller sends an SPI command to the backlight master controller to normally start up, and the backlight slave controller starts up the LED circuit after receiving the start-up command sent by the backlight master controller. Wherein, total controller generally indicates the total controller of mainboard, for example the total controller of TV, and total controller except can detecting that backlight system has the trouble, can also control and handle audio signal and video signal, when total controller collocation has the WIFI module, can also be connected with the high in the clouds, carries out the update of long-range upgrading and trouble code bank. The master controller generally refers to a control unit on a main board, for example, a control unit on a television main board, and when the master controller detects that the backlight main controller fails or receives a second failure signal sent by the backlight main controller, the master controller restarts to complete a reset operation, and simultaneously controls the power supply to supply power. Generally, when the backlight master controller or the backlight slave controller has a power failure or other non-destructive faults, the repair can be performed by restarting the reset, when the backlight master controller and the backlight slave controller still cannot normally work after the reset, the master controller can reset itself to complete the reset of the whole circuit, and the power supply is controlled to supply power again to repair the backlight master controller or the backlight slave controller.

And S3, repeatedly resetting and reporting errors.

In the embodiment of the invention, when the master controller repeatedly receives the first fault signal or the second fault signal, the fault existing in the local light control circuit cannot be repaired by self, and a professional worker is required to repair the fault, so that the fault can be reported through the display screen, and the worker can know the fault condition conveniently.

And S31, if the times that the master controller receives the first fault signal are larger than a first preset time, reporting an error through a display screen.

In the embodiment of the invention, when the number of times that the master controller receives the first fault signal is greater than the first preset number of times, an error report related to the first fault signal can be output to the display screen.

In some embodiments, for example, in this embodiment, the step S31 may include the following steps: judging whether the frequency of receiving the first fault signal is greater than the first preset frequency or not; and if the number of times of receiving the first fault signal is greater than the first preset number of times, outputting the first fault code to the display screen to remind a user of the first fault type of the LED circuit with the fault.

In the embodiment of the invention, when the master controller repeatedly receives the first fault signal, the number of times of receiving the first fault signal is judged, and when the number of times of receiving the first fault signal is greater than a first preset number of times, the first fault code is output to the display screen, so that a user or a worker is reminded of an LED circuit with a fault and a corresponding first fault type.

And S32, if the number of times that the master controller receives the second fault signal or the number of times that the master controller detects that the backlight main controller has faults is larger than a second preset number of times, reporting an error through the display screen.

In the embodiment of the present invention, when the number of times that the master controller receives the second fault signal is greater than a second preset number of times, an error report related to the second fault signal may be output to the display screen, where the first preset number of times and the second preset number of times may be specified by a user and may be the same. In addition, if the master controller detects that the failure frequency of the backlight master controller is greater than a second preset frequency, an error report related to a second failure signal can be output to the display screen.

In some embodiments, for example, in this embodiment, the step S32 may include the following steps: judging whether the number of times of receiving the second fault signal and the number of times of detecting that the backlight main controller has faults are greater than a second preset number of times or not; and if the number of times of receiving the second fault signal or the number of times of detecting the fault of the backlight main controller is greater than the second preset number of times, generating alarm information, and outputting the second fault code and the alarm information to the display screen.

In the embodiment of the invention, when the number of times of receiving the second fault signal by the master controller is greater than a second preset number of times or the number of times of detecting that the backlight main controller has faults is greater than the second preset number of times, the alarm information is generated, and the second fault code and the alarm information are output to the display screen. In addition, a third preset fault code can be also arranged in the master controller and used for identifying a third fault type of the backlight main controller and correspondingly outputting the third fault code to the display screen, so that a worker can conveniently maintain the master controller, wherein the refreshing frequency of the fault code is consistent with that of the display. Meanwhile, if the audio equipment is equipped, fault codes can be output through voice broadcasting.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a local optical circuit self-testing reset system 100 according to an embodiment of the present invention, which can automatically repair a local optical circuit without relying on a detection circuit.

As shown in fig. 3, the area-controlled lighting circuit self-checking reset system 100 provided by the present invention includes a master controller 10, a backlight master controller 20, and a plurality of backlight slave controllers 30; the backlight slave controller 30 is configured to connect to an LED unit 60 of a display device, detect whether the LED unit 60 has a fault, and send a first fault signal to the backlight master controller when the LED unit 60 has the fault, where the LED unit 60 includes at least one LED circuit; the backlight master controller 20 is connected to the backlight slave controller 30, and configured to detect whether the backlight slave controller 30 has a fault, and send a second fault signal to the backlight master controller 20 when the backlight slave controller 30 has a fault, where the backlight master controller 20 is further configured to receive the first fault signal and send the first fault signal to the master controller 10; the overall controller 10 is connected to the backlight main controller 20, and is configured to detect whether the backlight main controller 20 has a fault, receive the first fault signal and the second fault signal, and execute a reset operation when the backlight main controller 20 has a fault or receives the second fault signal, and the overall controller 10 is further configured to close the channel of the LED unit 60 according to the first fault signal.

Specifically, the master controller 10, the backlight master controller 20, and the backlight slave controller 30 may be single-chip microcomputers, and different types of single-chip microcomputers are selected according to different display devices. The backlight slave controller 30 is connected to at least one LED circuit in the LED unit 60, the upper limit of the LED circuits to which the backlight slave controller 30 can be connected is determined by the attribute of the backlight slave controller 30, and generally, at most 16 LED circuits can be connected to one 8-bit backlight slave controller 30. The backlight controller 30 detects whether there is a failed LED circuit among the connected LED circuits in real time, generates a first failure signal when there is a failure of the LED circuit among the connected LED circuits, and transmits the first failure signal to the backlight controller 20. The backlight master controller 20 is connected to a plurality of backlight slave controllers 30, on one hand, detects whether each connected backlight slave controller 30 has a fault in real time, and generates a second fault signal when one or more backlight slave controllers 30 in the connected backlight slave controllers 30 have a fault, wherein the fault of the backlight slave controllers 30 generally refers to a non-destructive fault, for example, a power failure fault caused by insufficient power supply of the backlight slave controllers 30, and on the other hand, the backlight slave controllers 30 can also receive a first fault signal and send the first fault signal to the master controller 10.

The communication between the backlight Slave controller 30 and the backlight Slave controller 30, between the backlight Slave controller 30 and the backlight master controller 20, and between the backlight master controller 20 and the master controller 10 are performed by SPI (Serial Peripheral Interface), which is a high-speed, full-duplex, synchronous communication bus including at least 4 data lines, namely MISO (master input Slave Output), MOSI (master Output Slave input), SCLK (Serial clock), and CS (chip select), where MISO is used for master data input and Slave data Output, MOSI is used for master data Output and Slave data input, and SCLK is used for transmitting a clock signal generated by the master device, CS is used for transmitting an enable signal, controlled by the master device, explained by the communication between the backlight master controller 20 and one of the backlight Slave controllers 30, MOSI of the backlight master controller 20 is used for outputting data to the MOSI of the backlight Slave controller, the MISO of the backlight slave controller 30 is used to output data to the MISO of the backlight master controller, and the backlight master controller 20 may determine whether there is a failure in the backlight slave controller 30 by controlling the backlight slave controller 30 to be turned on and off by the CS and receiving data transferred from the backlight slave controller 30 by the MISO.

The overall controller 10 is connected to the backlight main controller 20, and is configured to detect whether the backlight main controller 20 has a fault, and receive a first fault signal and a second fault signal. The overall controller 10 may specifically be a core controller on a main board, for example, when the display device is a television, the overall controller 10 is a TV controller on the main board, and is used for controlling the local optical control circuit and other systems of the television, wherein when the backlight main controller 20 has a fault or receives a second fault signal, the reset operation is performed, and after the reset operation is completed, the power supply is controlled to supply power to the local optical control circuit again. When the first fault signal is received, the channel of the LED circuit with the fault is closed to protect the whole area light control circuit. In addition, when the display device is just started, the overall controller 10 performs self-test, controls the backlight master controller 20 to initialize the backlight slave controller 30, and after the overall controller 10 completes the self-test, sends a start command to the backlight master controller 20 so that the backlight master controller 20 controls the backlight slave controller 30 to start the connected LED circuit to operate normally after receiving the start command.

As shown in fig. 4, which is a schematic flow chart of the self-checking and resetting system of the local optical circuit according to the embodiment of the present invention, when the display device is started, the main controller 10 performs a self-checking operation to confirm that the self-checking and resetting system of the entire local optical circuit can operate normally, when a fault is found in the self-checking process, records the fault information, and determines whether the fault information appears many times, if the fault information appears for the first time or appears less times, the main controller processes the fault information according to the self-checking and resetting method of the local optical circuit according to the embodiment of the present invention, and when the fault information appears repeatedly, the alarm information is displayed through the display screen, as shown in fig. 5, the display screen displays a fault and a fault code of a local functional module, so that a user can know details. After the self-checking is finished and normal operation is started, the master controller, the backlight master controller and the backlight slave controller can detect whether a fault exists in the area light-control circuit self-checking reset system or not according to the self-checking period, when the fault is detected, processing is carried out according to the area light-control circuit self-checking reset method, and if the fault is not detected, normal operation is continued until the next self-checking period comes.

In an embodiment, the plurality of backlight slave controllers 30 are connected in series, an input terminal of a first one of the plurality of backlight slave controllers 30 is connected to an output terminal of the backlight master controller 20, and an output terminal of a last one of the plurality of backlight slave controllers 30 is connected to an input terminal of the backlight master controller 20.

The connection between the backlight slave controller 30 and the backlight master controller 20 may be that the backlight master controller 20 is connected to all the backlight master controllers 20, or that the backlight slave controller 30 is connected to the backlight slave controller 30 and the backlight slave controller 20 are connected to each other in series to realize daisy-chain connection, and when data is transferred, the data sent by the backlight slave controller 30 is transferred upwards step by step until the data is transferred to the backlight master controller 20.

In an embodiment, the intelligent display system further comprises a signal display unit 40 and a WIFI module 50, the signal display unit 40 is respectively connected with the main controller 10 and the display screen of the display device, and the WIFI module 50 is connected with the main controller 10.

The signal display unit 40 is configured to output a first failure signal and a second failure signal, so that a user can know a failure occurring in the local light control circuit. The master controller 10 can be connected with the cloud through the WIFI module 50, so that the functions of remote upgrading and fault information collection are achieved.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, while the invention has been described with respect to the above-described embodiments, it will be understood that the invention is not limited thereto but may be embodied with various modifications and changes.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.