CN113763894B - Regional control circuit self-checking resetting method and system - Google Patents
Regional control circuit self-checking resetting method and systemDownload PDFInfo
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- CN113763894B CN113763894BCN202111159646.0ACN202111159646ACN113763894BCN 113763894 BCN113763894 BCN 113763894BCN 202111159646 ACN202111159646 ACN 202111159646ACN 113763894 BCN113763894 BCN 113763894B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
Description
Technical Field
The invention relates to the technical field of display, in particular to a self-checking resetting method and system for a regional control circuit.
Background
Along with the continuous improvement of the living standard of people due to the daily and monthly science and technology, the requirements of people on display screens are higher and higher, and high-definition and bright-colored words become important conditions for people to judge the performance of a television.
In order to ensure that the backlight system can stably work, a detection circuit is generally arranged to detect whether the backlight system has faults or not, or the detection circuit detects and repairs self-programmed faults by means of the driving chip, but the detection circuit needs to be adaptively adjusted for the backlight systems of different display devices, and different faults also need different detection circuits for the same backlight system, so that the cost is high, and the driving chip can only detect and repair self-programmed faults and cannot detect other faults.
In addition, in some circuits, a voltage dividing resistor is adopted for the power supply voltage of the backlight system to obtain a detection voltage, and a mechanism that the detection voltage meets a trigger condition is obtained through comparison of a comparator and a reference voltage. In the mode of judging through the analog circuit, an I/O port is additionally needed to be added in the singlechip, and peripheral resistance and capacitance are needed to be detected. The peripheral hardware also needs to be modified when matching different voltage schemes.
Disclosure of Invention
The embodiment of the invention provides a self-checking resetting method and a self-checking resetting system for a regional control circuit, which not only can carry out self-checking when the regional control circuit is started, but also can repair the fault of the regional control circuit and carry out error reporting.
In a first aspect, an embodiment of the present invention provides a self-checking and resetting method for an area control circuit, where the area control 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 so that the backlight master controller controls the LED units to work normally through the backlight slave controller;
s2, fault resetting;
s21, if the backlight slave controller detects that an LED circuit in the LED unit has a fault, sending the first fault 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 main controller detects that the backlight slave controller fails, sending the second failure signal to the master controller;
s25, if the master controller detects that the backlight main controller fails or receives the second failure signal, resetting is carried out;
s3, repeatedly resetting and reporting errors;
s31, if the number of times that the total controller receives the first fault signal is greater than a first preset number of times, reporting errors through a display screen;
s32, if the total controller receives the second fault signal times or detects that the fault occurrence times of the backlight main controller are larger than the second preset times, error reporting is carried out through the display screen.
In a second aspect, the embodiment of the invention also provides a regional control circuit self-checking reset system, which comprises a master controller, a backlight master controller and a plurality of backlight slave controllers; the backlight slave controller is used for connecting an LED unit of the display device, 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 main controller is connected with the backlight slave controller and is used for detecting whether the backlight slave controller has faults or not and sending a second fault signal to the backlight main controller when the backlight slave controller has faults, and the backlight main 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 is 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.
Further, the backlight slave controllers are connected in series, the input end of the first backlight slave controller in the backlight slave controllers is connected with the output end of the backlight master controller, and the output end of the last backlight slave controller in the backlight slave controllers is connected with the input end of the backlight master controller.
Further, the system also comprises a signal display unit and a WIFI module, wherein the signal display unit is respectively connected with the master controller and a display screen of the display device, and the WIFI module is connected with the master controller.
The self-checking resetting method and the self-checking resetting system for the regional control circuit can perform self-checking when the master controller is started, initialize the backlight slave controller to ensure that the regional control circuit can normally operate, detect whether the LED circuit has faults or not through the backlight slave controller after the regional control circuit normally operates, timely discover the faults of the LED circuit and send a first fault signal to the backlight master controller when the LED circuit has faults, and the backlight master controller is used for receiving the first fault signal on one hand and detecting whether the backlight slave controller has faults on the other hand, and sends a second fault signal to the master controller when the backlight slave controller has faults, wherein the master controller is used for receiving the first fault signal and closing a channel of the corresponding LED circuit according to the first fault signal, and is used for receiving the second fault signal and resetting according to the second fault signal.
And after the backlight slave controller or the LED unit controlled by the backlight slave controller fails, the backlight master controller is used as an intermediate bridge, and error codes are reported to the master controller, so that the automatic repair of the system is realized or the fault fact is prompted to a user.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a self-checking reset method for an area control circuit according to an embodiment of the present invention;
fig. 2 is a self-checking flow chart of a self-checking reset method of a regional control circuit provided by an embodiment of the invention;
fig. 3 is a schematic structural diagram of a self-checking reset system for a regional control circuit according to an embodiment of the present invention;
FIG. 4 is a flow chart of the operation of the regional control circuit self-checking reset system provided by the embodiment of the invention;
fig. 5 is a schematic diagram showing a repeated fault picture of the regional control circuit self-checking reset system according to the embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "comprises" and "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 this specification 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 the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Referring to fig. 1, fig. 1 is a schematic flow chart of a regional control circuit self-checking reset system according to an embodiment of the invention. The self-checking reset method for the regional control circuit can automatically reset to repair faults when the regional control circuit has faults. As shown in fig. 1, the method includes steps S1 to S3.
S1, self-checking.
In the embodiment of the invention, when the display device is just powered on and enters a normal working mode or a factory mode, the master controller starts self-checking, the self-checking flow is shown in fig. 2, the master controller controls the backlight master controller to perform self-checking, the backlight master controller controls the backlight slave controller to perform self-checking, after the self-checking is completed, the backlight slave controller returns data to the backlight master controller, and the backlight master controller returns data to the master controller, so that the master controller is convenient for judging whether the whole regional control circuit has faults or not.
And S11, if the master controller receives a starting instruction, starting 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 work normally.
And S12, if the master controller completes self-checking, sending a starting instruction to the backlight master controller so that the backlight master controller controls the LED units to work normally through the backlight slave controller.
In the embodiment of the invention, after the master controller completes self-checking, the master controller sends a starting command to the backlight master controller, and the backlight master controller controls the backlight slave controller to start after receiving the starting command and controls the LED unit to start through the backlight slave controller.
In some embodiments, for example, 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 receives the starting instruction from the controller, starting the LED unit to enable the LED unit to start working.
In the embodiment of the invention, after the self-checking is started, the master controller judges whether the self-checking is finished, and after the self-checking is finished, the master controller generates a startup data packet and sends the startup data packet to the backlight master controller to realize the startup instruction sending, and after the backlight master controller receives the startup data packet, the master controller sends the startup data packet to the backlight slave controller, and after the backlight slave controller receives the startup data packet, the LED unit is controlled to be conducted, so that the LED unit starts working.
S2, fault resetting.
In the embodiment of the invention, after the main controller completes self-checking, the display device enters normal operation, 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, repair and reset can be carried out.
And S21, if the backlight slave controller detects that the LED circuit in the LED unit has faults, sending the first fault signal to the backlight master controller.
In the embodiment of the invention, the LED unit comprises at least one LED circuit, the number of the LED circuits is determined by the attribute of the backlight slave controller, and generally, one 8-bit backlight slave controller can be simultaneously connected with 16 LED circuits at most. The backlight slave controller is used for detecting whether a fault such as a short circuit or an open circuit occurs in the connected LED circuit. The number of the backlight slave controllers may be plural, and the connection mode between the backlight master controller and the plurality of backlight slave controllers may be a daisy type connection mode, for example, one backlight master controller and two backlight slave controllers, the backlight master controller is connected to the first backlight slave controller, the first backlight slave controller is connected to the 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 singlechip, different data correspond to different fault codes, and different fault codes correspond to different fault types, so that the fault codes can be transmitted to a master controller, and workers can confirm the fault types conveniently. When the backlight slave controller detects that the LED circuit is in fault, a first fault signal is sent to the backlight master controller, so that the backlight master controller is conveniently reminded of the fault of the LED circuit. At the same time, the backlight slave controller also processes the LED circuit according to the failure of the LED circuit, for example, turns off the failed LED circuit.
In some embodiments, for example, the step S21 may include the following steps: confirming an LED circuit with faults in the LED unit, and identifying a first fault 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 faults of open circuit, short circuit, low power supply voltage and the like, 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, when one of the registers in the 8-bit single-chip microcomputer is used for storing the first fault codes, for example, the 0x02 register, 255 different first fault codes can 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 circuits are detected to be faulty, the first fault code can be confirmed according to the first fault type, if a plurality of LED circuits are faulty, the LED circuits can be confirmed first, then the first fault types of different LED circuits are confirmed, and finally the first fault code is confirmed. After confirming the first failure code, a first failure signal is generated and sent to the backlight main controller, for example, the first failure code is 00000010, and the data is sent to the backlight main controller as the first failure signal.
And S22, if the backlight main controller receives the first fault signal, the first fault signal is sent 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.
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 the first fault signal sent by the backlight main controller, the master controller closes the channel of the LED circuit with fault according to the first fault signal, thereby protecting the whole circuit.
And S24, if the backlight main controller detects that the backlight slave controller fails, sending the second failure signal to the master controller.
In the embodiment of the invention, the backlight master controller is generally provided with one backlight slave controller for managing the backlight, the backlight slave controllers can be provided with a plurality of backlight slave controllers according to the actual requirement of the display, the backlight master controller and the backlight slave controllers are communicated by adopting SPI (Serial Peripheral interfaces) communication protocols, the connection between the backlight master controller and the backlight slave controllers can be in a conventional connection mode, namely the backlight master controller is respectively connected with all the backlight slave controllers, or chrysanthemum-type connection is adopted, namely the backlight master controller and the backlight slave controllers are connected in series, and data are transmitted between the backlight slave controllers step by step. The backlight main controller detects whether the connected backlight slave controller has nondestructive 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 may generate a second failure signal to the overall controller according to the failure type of the backlight slave controller. When the backlight master controller is connected with a plurality of backlight slave controllers, the failed backlight slave controller can be identified. For example, when the backlight master controller detects that the data returned from the backlight slave controller MISO are all "0", this indicates that the backlight slave controller has a power failure.
In some embodiments, for example, the step S24 may include the following steps: if the backlight slave controller is detected to have a fault, initializing and restarting the backlight slave controller; if the failure of the backlight slave controller is continuously detected, confirming the times of continuously detecting the failure of the backlight slave controller; if the continuous detection of the failure times of the backlight slave controller is greater than a third preset times, generating a second failure signal; transmitting the second fault signal to the master controller
In the embodiment of the invention, when the backlight master controller detects that one or more backlight slave controllers are failed, the failed backlight slave controller can be initialized first, and then the failed backlight slave controller is restarted to repair the failure of the backlight slave controller. In general, when a non-destructive failure such as power down occurs in the backlight slave controller, the backlight slave controller may be repaired by initializing and restarting so that the backlight slave controller is restored to the failure. The detection of the backlight slave controller by the backlight master controller is generally real-time, and the continuous detection of the same backlight slave controller is that the detection of the backlight slave controller is displayed as a fault every time, and when the detection of the backlight slave controller is normal once, the number of times is recalculated. And after repairing the failed backlight slave controller, if the failure of the repaired backlight slave controller is still detected, repeating the initialization and restarting actions, and when the failure of the repaired backlight slave controller is continuously detected for a plurality of times, confirming the continuous detection times so as to judge whether the failure needs to be reported to the master controller. When the number of continuous detection of the failure of the backlight from the controller is greater than the third preset number of times, the third preset number of times may be specified by the user, and a second failure signal may be generated. For example, when the preset number of times is 5 and the same backlight is detected to be failed from the controller 6 times continuously, a second failure signal is generated.
In some embodiments, for example, 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; and generating the second fault signal according to the second fault code.
In the embodiment of the invention, taking an 8-bit singlechip as an example for explanation, a 0x01 register in a backlight main controller can be used for storing fault codes, 255 kinds of fault codes can be recorded, if 255 kinds of codes are insufficient to record all second fault types, 0x02 registers can be added for storing the second fault codes, and 65535 kinds of second fault codes can be recorded. When the backlight master controller continuously detects that the backlight slave controller fails for a plurality of times, the second failure type of the backlight slave controller is identified, a corresponding second failure code is confirmed in a second preset failure code table, and finally a second failure signal is generated according to the second failure code.
S25, if the master controller detects that the backlight main controller fails or receives the second failure signal, resetting operation is executed.
In the embodiment of the invention, the master controller is used for detecting whether the backlight master controller fails or not and receiving a first failure signal. Meanwhile, when the equipment is just started, the master controller can perform self-checking, the backlight master controller is controlled to initialize the backlight slave controller, after the master controller completes self-checking, an SPI command is sent to the backlight master controller to start normally, and after the backlight slave controller receives a start-up command sent by the backlight master controller, the LED circuit is started. The general controller refers to a general controller of a main board, for example, a TV general controller, and the general controller can detect whether a backlight system has a fault, control and process audio signals and video signals, and when the general controller is equipped with a WIFI module, the general controller can be connected with a cloud for remote upgrade and update of a fault code library. The general controller generally refers to a control unit on a main board, for example, a control unit on a television main board, and when the general controller detects that the backlight main controller fails, or receives a second failure signal sent by the backlight main controller, the general controller restarts to complete the reset operation, and meanwhile, the general controller also controls the power supply to supply power. In general, when a non-destructive fault such as power failure occurs in the backlight master controller or the backlight slave controller, the repair can be performed by restarting the reset, and when the backlight master controller and the backlight slave controller still cannot normally work after being 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.
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 regional control circuit cannot be repaired by itself, and a professional worker is required to repair the regional control circuit, so that the fault condition can be conveniently known by the worker through the display screen.
And S31, if the number of times that the total controller receives the first fault signal is greater than a first preset number of times, reporting errors through a display screen.
In the embodiment of the invention, when the number of times that the total 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, the step S31 may include the following steps: judging whether the times of receiving the first fault signals is larger than the first preset times 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 a 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 larger than the first preset number of times, the first fault code is output to the display screen so as to remind a user or staff of the fault of the LED circuit and the corresponding first fault type.
S32, if the total controller receives the second fault signal times or detects that the fault times of the backlight main controller are larger than the second preset times, reporting errors through the display screen.
In the embodiment of the invention, when the number of times that the overall controller receives the second fault signal is greater than the second preset number of times, an error report related to the second fault signal can be output to the display screen, wherein the first preset number of times and the second preset number of times can be designated by a user and can be the same. In addition, if the total controller detects that the number of times of the failure of the backlight main controller is greater than the second preset number of times, an error report related to the second failure signal can be output to the display screen.
In some embodiments, for example, the step S32 may include the following steps: judging whether the times of receiving the second fault signals and the times of detecting the faults of the backlight main controller are larger than the second preset times or not; and if the number of times of receiving the second fault signal or the number of times of detecting that the backlight main controller is in fault is larger 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 the second fault signal received by the master controller is greater than a second preset number of times or the number of times of the fault occurrence of the backlight master controller is detected to be greater than the second preset number of times, alarm information is generated, and a second fault code and the alarm information are output to a 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 master controller and correspondingly outputting the third fault code to the display screen, so that maintenance is convenient for staff, and the refresh frequency of the fault code is consistent with that of the display. Meanwhile, if the audio equipment is arranged, the fault code can be output through voice broadcasting.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a self-checkingreset system 100 for an area control circuit according to an embodiment of the present invention, where the area control circuit can be repaired by itself without relying on a detection circuit.
As shown in fig. 3, the regional control circuit self-checking reset system 100 provided by the invention comprises 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 and detect whether the LED unit 60 has a fault, and when the LED unit 60 has a fault, send a first fault signal to the backlight master controller, wherein the LED unit 60 includes at least one LED circuit; the backlight master controller 20 is connected with the backlight slave controller 30, and is 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 overall 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 perform 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 a channel of the LED unit 60 according to the first fault signal.
Specifically, themaster controller 10, thebacklight master controller 20 and thebacklight slave controller 30 may be a single-chip microcomputer, and different single-chip microcomputer types are selected according to different display devices. Thebacklight slave controller 30 is connected to at least one LED circuit in theLED unit 60, and the upper limit of the LED circuits to which thebacklight slave controller 30 can be connected is determined by the attribute of thebacklight slave controller 30, and typically, at most 16 LED circuits can be connected to one 8-bitbacklight slave controller 30. Thebacklight slave controller 30 detects in real time whether or not there is a failed LED circuit among the connected LED circuits, 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 thebacklight master controller 20. Thebacklight master controller 20 is connected with a plurality ofbacklight slave controllers 30, on one hand, detects whether each connectedbacklight slave controller 30 has a fault in real time, and generates a second fault signal when one or more connectedbacklight slave controllers 30 have a fault in the connectedbacklight slave controllers 30, wherein the fault in thebacklight slave controllers 30 generally refers to a non-destructive fault, such as a power failure fault caused by insufficient power supply of thebacklight slave controllers 30, and on the other hand, thebacklight slave controllers 30 can also receive the first fault signal and send the first fault signal to theoverall 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 is performed by the SPI protocol (Serial Peripheral Interface), which is a high-speed, full duplex, synchronous communication bus, containing at least 4 data lines, MISO (MasterInput Slave Output), MOSI (Master Output Slave Input), SCLK (Serial Clock) and CS (Chip Select) respectively, wherein MISO is used for master data input, slave data output, MOSI is used for master data output, slave data input, SCLK is used for transmitting a clock signal generated by the master device, CS is used for transmitting an enable signal, and is controlled by the master device, the MOSI of the backlight master controller 20 is used for outputting data to the MOSI of the backlight slave controller 30, the MISO of the backlight slave controller 30 is used for outputting data to the MISO of the backlight master controller 30, the backlight master controller 20 can control the activation and the deactivation of the backlight slave controller 30 by CS, and the reception of the data transferred from the master controller 30 by the o is used for judging whether or not a fault of the backlight slave controller 30 exists.
Theoverall controller 10 is connected to the backlightmain controller 20 for detecting whether the backlightmain controller 20 has a fault or not, and for receiving a first fault signal and a second fault signal. Theoverall controller 10 may specifically be a core controller on a main board, for example, when the display device is a television, theoverall controller 10 is a TV controller on the main board, and is used for controlling other systems of the television in addition to the regional control light circuit, where when the backlightmain controller 20 has a fault or receives a second fault signal, a reset operation is performed, and after the reset operation is completed, the power supply is controlled to supply power to the regional control light circuit again. And when the first fault signal is received, closing a channel of the LED circuit with the fault to protect the whole area control circuit. In addition, when the display device is just started, themaster controller 10 performs self-checking, and controls thebacklight master controller 20 to initialize thebacklight slave controller 30, and after themaster controller 10 completes self-checking, a start command is sent to thebacklight master controller 20 to enable thebacklight master controller 20 to control thebacklight slave controller 30 to start the connected LED circuit to work normally after receiving the start command.
As shown in fig. 4, which is a schematic flow chart of the regional control circuit self-checking reset system provided by the embodiment of the present invention, when the display device is started, themaster controller 10 will perform self-checking first to confirm that the whole regional control circuit self-checking reset system can normally operate, when a fault is found in the self-checking process, record the fault information, and determine whether the fault information appears for the first time or not, if the fault information appears for the first time or appears for a small time, the master controller processes the fault information according to the regional control circuit self-checking reset method provided by 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 fault code of the local functional module is displayed on the display screen, so that the user can know details conveniently. After the self-checking is finished and the normal operation is carried out, the master controller, the backlight master controller and the backlight slave controller can detect whether a fault exists in the regional control circuit self-checking reset system according to the self-checking period, when the fault is detected, the fault is processed according to the regional control circuit self-checking reset method, and if the fault is not detected, the normal operation is continued until the next self-checking period comes.
In an embodiment, a plurality of thebacklight slave controllers 30 are connected in series, and an input terminal of a first one of the plurality of thebacklight slave controllers 30 is connected to an output terminal of thebacklight master controller 20, and an output terminal of a last one of the plurality of thebacklight slave controllers 30 is connected to an input terminal of thebacklight master controller 20.
The connection between thebacklight slave controller 30 and thebacklight master controller 20 may be that thebacklight master controller 20 is connected to all thebacklight master controllers 20, or may be that thebacklight slave controller 30 and the other light slave controller and thebacklight master controller 20 are connected in series to realize a daisy chain connection, and when data is transferred, the data sent by thebacklight slave controller 30 is transferred step by step upwards until transferred to thebacklight master controller 20.
In an embodiment, the system further comprises asignal display unit 40 and aWIFI module 50, wherein thesignal display unit 40 is respectively connected with theoverall controller 10 and a display screen of the display device, and theWIFI module 50 is connected with theoverall controller 10.
Thesignal display unit 40 is configured to output a first fault signal and a second fault signal, so that a user can know a fault of the regional light control circuit. Themaster controller 10 can be connected with the cloud through theWIFI 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 described in connection with the embodiments disclosed herein may be embodied in electronic hardware, in computer software, or in a combination of the two, and that the elements and steps of the examples have been generally described in terms of function in the foregoing description to clearly illustrate 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 solution. 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 foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (8)
1. The regional control circuit self-checking resetting method is characterized by comprising the following steps of:
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 so that the backlight master controller controls the LED units to work normally through the backlight slave controller;
s2, fault resetting;
s21, if the backlight slave controller detects that an LED circuit in the LED unit has a fault, a first fault signal is sent 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 main controller detects that the backlight slave controller fails, a second failure signal is sent to the master controller;
s25, if the master controller detects that the backlight main controller fails or receives the second failure signal, resetting is carried out;
wherein if the backlight slave controller detects that the LED circuit in the LED unit has a fault, sending the first fault signal to the backlight master controller includes:
confirming an LED circuit with faults in the LED unit, and identifying a first fault type of the LED circuit;
confirming a first fault code corresponding to the first fault type according to a first preset fault code library;
generating the first fault signal according to the first fault code, and sending the first fault signal to the backlight main controller;
s3, repeatedly resetting and reporting errors;
s31, if the number of times that the total controller receives the first fault signal is greater than a first preset number of times, reporting errors through a display screen;
s32, if the total controller receives the second fault signal times or detects that the fault times of the backlight main controller are larger than second preset times, reporting errors through the display screen;
and the backlight master controller, the backlight slave controller and the backlight slave controller are communicated by adopting an SPI communication protocol.
2. The method for resetting the regional control circuit by self-checking as claimed in claim 1, wherein if the number of times the total controller receives the first fault signal is greater than a first preset number of times, the step of reporting the fault through the display screen comprises:
judging whether the times of receiving the first fault signals is larger than the first preset times 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 a first fault type of the LED circuit with the fault.
3. The method of claim 1, wherein the step of sending the second fault signal to the master controller if the backlight master controller detects that the backlight slave controller has failed comprises:
if the backlight slave controller is detected to have a fault, initializing and restarting the backlight slave controller;
if the failure of the backlight slave controller is continuously detected, confirming the times of continuously detecting the failure of the backlight slave controller;
if the continuous detection of the failure times of the backlight slave controller is greater than a third preset times, generating a second failure signal;
and sending the second fault signal to the master controller.
4. The regional control circuit self-test reset method of claim 3, wherein said generating said 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;
and generating the second fault signal according to the second fault code.
5. The method for resetting the local control circuit self-checking as claimed in claim 4, wherein if the number of times the master controller receives the second fault signal or the number of times the master controller detects that the backlight controller fails is greater than a second preset number of times, the step of reporting an error through the display screen further comprises:
judging whether the times of receiving the second fault signals and the times of detecting the faults of the backlight main controller are larger than the second preset times or not;
and if the number of times of receiving the second fault signal or the number of times of detecting that the backlight main controller is in fault is larger than the second preset number of times, generating alarm information, and outputting the second fault code and the alarm information to the display screen.
6. The method for resetting the self-checking circuit of the regional control circuit as recited in claim 1, wherein the step of sending a start-up command to the backlight master controller to cause the backlight master controller to control the LED units to operate normally through the backlight slave controller if the master controller completes self-checking 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 receives the starting instruction from the controller, starting the LED unit to enable the LED unit to start working.
7. The regional control circuit self-checking reset system 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 units, detecting whether the LED units have faults or not, and sending a first fault signal to the backlight master controller when the LED units have faults, wherein the LED units comprise at least one LED circuit;
the backlight main controller is connected with the backlight slave controller and is used for detecting whether the backlight slave controller has faults or not and sending a second fault signal to the backlight main controller when the backlight slave controller has faults, and the backlight main 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 master controller and is used for self-checking and controlling the backlight master controller to initialize the backlight slave controller, detecting whether the backlight master controller has faults, receiving the first fault signal and the second fault signal, and executing reset operation when the backlight master controller has faults 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;
the backlight master controller is communicated with the backlight slave controllers and the backlight slave controllers are communicated by adopting an SPI communication protocol, a plurality of the backlight slave controllers are connected in series, the input end of the first backlight slave controller in the backlight slave controllers is connected with the output end of the backlight master controller, and the output end of the last backlight slave controller in the backlight slave controllers is connected with the input end of the backlight master controller.
8. The regional control circuit self-checking reset system of claim 7, further comprising a signal display unit and a WIFI module, wherein the signal display unit is connected with the display screens of the master controller and the display device, respectively, and the WIFI module is connected with the master controller.
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