CN111010519A - Control method of display device, television and storage medium - Google Patents
Control method of display device, television and storage medium Download PDFInfo
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- CN111010519A CN111010519A CN201911344779.8A CN201911344779A CN111010519A CN 111010519 A CN111010519 A CN 111010519A CN 201911344779 A CN201911344779 A CN 201911344779A CN 111010519 A CN111010519 A CN 111010519A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/57—Control of contrast or brightness
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
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Abstract
The invention provides a control method of a display device, a television and a storage medium, wherein the display device comprises a mainboard, a micro control unit and a backlight constant current board, and the method is applied to the micro control unit and comprises the following steps: when the display device is detected to be powered on, receiving a field synchronization signal sent by the main board, and judging whether the field synchronization signal is stable; if the field synchronizing signal is stable, the field synchronizing signal is sent to a backlight constant current board; and if the field synchronizing signal is unstable, sending the fixed field synchronizing signal to a backlight constant current board. The invention ensures that the backlight constant current board always receives stable field synchronous signals when being electrified, and eliminates the backlight flicker phenomenon caused by the instability of the backlight constant current board at the moment of electrifying the display device, thereby improving the stability and reliability of the display device, in particular to an 8k display device.
Description
Technical Field
The present invention relates to the field of television technologies, and in particular, to a control method for a display device, a television, and a storage medium.
Background
In recent years, the display technology has been rapidly developed, and the resolution of the display device has been developed from FHD (Full High Definition) to 2K, then from 2K to 4K, and then 8K technology has become mature. The 8K resolution results in a resolution of 7680x4320, with 8K resolution being 4 times the 4K resolution, and more than 16 times the FHD resolution, and thus the importance of the 8K technique is self evident.
Although the resolution improvement brought by the 8K technology brings better viewing experience to users, in order to realize the display effect of the 8K display device, the number of LED lamps in the display device needs to be increased and the power supply voltage to the LEDs needs to be increased; meanwhile, in order to fully exert the performance of the 8K display device, a large number of backlight control chips need to be arranged. With the increase of the number of the LED lamps and the backlight control chips and some required configurations of the 8K display device, the configuration inside the 8K display device is more complicated, and the existing 8K display device lacks stability and reliability and is prone to malfunction.
Disclosure of Invention
The invention mainly aims to provide a control method of a display device, a television and a storage medium, and aims to solve the technical problem that the display device is lack of stability and reliability.
In order to achieve the above object, the present invention provides a control method of a display device, the display device includes a main board, a micro control unit and a backlight constant current board, the method is applied to the micro control unit, and includes the following steps:
when the display device is detected to be powered on, receiving a field synchronization signal sent by a main board, and judging whether the field synchronization signal is stable;
if the field synchronizing signal is stable, the field synchronizing signal is sent to a backlight constant current board;
and if the field synchronizing signal is unstable, sending a fixed field synchronizing signal to a backlight constant current board.
Optionally, the step of determining whether the field synchronization signal is stable includes:
detecting the frequency of the field synchronization signal, and determining whether the frequency of the field synchronization signal is a preset frequency;
if yes, determining that the field synchronization signal is stable;
and if not, determining that the field synchronization signal is unstable.
Optionally, the step of sending the fixed field sync signal to the backlight constant current board includes:
and setting the frequency of the fixed field synchronous signal to be a preset frequency and then sending the preset frequency to a backlight constant current board.
Optionally, the display device further comprises a backlight area, and the method further comprises:
after the display device is lightened, reading feedback voltage values of corresponding light emitting diodes in backlight lamp areas stored by registers in the backlight constant current board;
and obtaining an average feedback voltage value according to all the feedback voltage values, and modifying the feedback voltage values stored in the registers into the average feedback voltage value so as to fix the input voltage of the backlight area.
Optionally, the step of obtaining an average feedback voltage value according to all feedback voltage values includes:
reading the number of registers in the backlight constant current board, and adding all feedback voltage values to obtain a corresponding total feedback voltage value;
and dividing the total value of the feedback voltage by the number of the registers to obtain an average feedback voltage value.
Optionally, after all the steps, further comprising:
receiving an error signal sent by the failure of self-detection of a backlight constant current board, and judging whether the error signal is a false trigger signal;
and if the error signal is a false trigger signal, restarting the backlight constant current plate.
Optionally, the step of determining whether the error signal is a false trigger signal includes:
when the error signal is received again, acquiring the time difference between the received two adjacent error signals;
if the time difference is greater than the preset time, determining that the error signal is a false trigger signal;
and if the time difference is not greater than the preset time, determining that the error signal is not a false trigger signal.
Optionally, after the step of determining whether the error signal is a false trigger signal, the method includes:
if the error signal is not the false trigger signal, returning to the step: and when the error signal is received again, acquiring the time difference between the received two adjacent error signals, and turning off the display device until the error signals are received for the preset times in total.
In addition, to achieve the above object, the present invention also provides a television comprising: a memory, a processor and a control program of a display device stored on the memory and executable on the processor, the control program of the display device implementing the steps of the control method of the display device as described above when executed by the processor.
Further, to achieve the above object, the present invention also provides a computer-readable storage medium having stored thereon a control program of a display apparatus, which when executed by a processor, realizes the steps of the control method of the display apparatus as described above.
The invention discloses a control method of a display device, a television and a storage medium, wherein when the display device is detected to be electrified, a field synchronizing signal sent by a main board is received, and whether the field synchronizing signal is stable or not is judged; if the field synchronizing signal is stable, the field synchronizing signal is sent to a backlight constant current board; and if the field synchronizing signal is unstable, sending the fixed field synchronizing signal to a backlight constant current board. The field synchronization signal sent by the main board is detected, and even if the field synchronization signal is unstable, a fixed preset signal is sent to the backlight constant current board. Therefore, the backlight constant current board can always receive stable field synchronous signals when being electrified, and the backlight flicker phenomenon caused by the instability of the backlight constant current board at the moment of electrifying the display device is eliminated, so that the stability and the reliability of the display device, particularly the 8k display device are improved.
Drawings
FIG. 1 is a schematic diagram of an apparatus in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a control method of a display device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a micro-control processor of the display device according to the present invention;
FIG. 4 is a schematic diagram of a partial module structure of a display device according to the present invention;
FIG. 5 is a flowchart illustrating a control method of a display device according to another embodiment of the present invention after the display device is powered on and turned on;
FIG. 6 is a flowchart illustrating a detailed process of determining whether the error signal is a false trigger signal according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal of the invention is a device which can be a television, and can also be a mobile phone, a computer, a mobile computer and other terminal equipment with a storage function.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the terminal may further include a camera, a Wi-Fi module, and the like, which are not described herein again.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 mainly includes an input unit such as a keyboard including a wireless keyboard and a wired keyboard, and is used to connect to the client and perform data communication with the client; and the processor 1001 may be configured to call up a control program of the display apparatus stored in the memory 1005 and perform the following operations:
when the display device is detected to be powered on, receiving a field synchronization signal sent by a main board, and judging whether the field synchronization signal is stable;
if the field synchronizing signal is stable, the field synchronizing signal is sent to a backlight constant current board;
and if the field synchronizing signal is unstable, sending a fixed field synchronizing signal to a backlight constant current board.
Further, the processor 1001 may call a control program of the display apparatus stored in the memory 1005, and also perform the following operations:
detecting the frequency of the field synchronization signal, and determining whether the frequency of the field synchronization signal is a preset frequency;
if yes, determining that the field synchronization signal is stable;
and if not, determining that the field synchronization signal is unstable.
Further, the processor 1001 may call a control program of the display apparatus stored in the memory 1005, and also perform the following operations:
and setting the frequency of the fixed field synchronous signal to be a preset frequency and then sending the preset frequency to a backlight constant current board.
Further, the processor 1001 may call a control program of the display apparatus stored in the memory 1005, and also perform the following operations:
after the display device is lightened, reading feedback voltage values of corresponding light emitting diodes in backlight lamp areas stored by registers in the backlight constant current board;
and obtaining an average feedback voltage value according to all the feedback voltage values, and modifying the feedback voltage values stored in the registers into the average feedback voltage value so as to fix the input voltage of the backlight area.
Further, the processor 1001 may call a control program of the display apparatus stored in the memory 1005, and also perform the following operations:
reading the number of registers in the backlight constant current board, and adding all feedback voltage values to obtain a corresponding total feedback voltage value;
and dividing the total value of the feedback voltage by the number of the registers to obtain an average feedback voltage value.
Further, the processor 1001 may call a control program of the display apparatus stored in the memory 1005, and also perform the following operations:
receiving an error signal sent by the failure of self-detection of a backlight constant current board, and judging whether the error signal is a false trigger signal;
and if the error signal is a false trigger signal, restarting the backlight constant current plate.
Further, the processor 1001 may call a control program of the display apparatus stored in the memory 1005, and also perform the following operations:
when the error signal is received again, acquiring the time difference between the received two adjacent error signals;
if the time difference is greater than the preset time, determining that the error signal is a false trigger signal;
and if the time difference is not greater than the preset time, determining that the error signal is not a false trigger signal.
Further, the processor 1001 may call a control program of the display apparatus stored in the memory 1005, and also perform the following operations:
if the error signal is not the false trigger signal, returning to the step: and when the error signal is received again, acquiring the time difference between the received two adjacent error signals, and turning off the display device until the error signals are received for the preset times in total.
The specific embodiment of the apparatus is substantially the same as the following embodiments of the control method of the display apparatus, and will not be described herein again.
Referring to fig. 2, fig. 2 is a schematic flow chart of an embodiment of a control method of a display device according to the present invention, where the display device includes a main board, a micro control unit and a backlight constant current board, and the method is applied to the micro control unit, and the control method of the display device provided in this embodiment includes the following steps:
step S10, when the display device is detected to be electrified, receiving a field synchronization signal sent by the mainboard, and judging whether the field synchronization signal is stable;
in this embodiment, after detecting that the display device is powered on, the main board may send a field synchronization signal to the micro control unit, and the micro control unit determines whether the field synchronization signal is stable after receiving the field synchronization signal. Referring to fig. 3, a circuit structure of the micro control unit in this embodiment is shown in fig. 3, which is a schematic circuit structure diagram of a micro control processor of the display device of the present invention. The specific source of the field sync signal in this embodiment is that, in order to synchronize the field scanning rule of the signal receiving end with the field sync rule, the signal sending end of the display device sends a pulse signal to the receiving end after the scanning is normally finished, which indicates that the scanning is finished, and the pulse signal is the field sync signal. In addition, it should be understood that, in the current display device control method, after the display device is powered on, the main board directly sends the field synchronization signal to the backlight constant current board, and the stability of the field synchronization signal is not detected, so that the backlight flicker phenomenon caused by the instability of the backlight constant current board is easily caused when the display device is powered on.
Step S20, if the field synchronizing signal is stable, the field synchronizing signal is sent to a backlight constant current board;
in this embodiment, please refer to fig. 4, in which fig. 4 is a schematic diagram of a partial module structure of a display device according to the present invention. The micro control unit receives a field synchronizing signal sent by the main board, detects the field synchronizing signal, generates a corresponding judgment result after judging whether the field synchronizing signal is stable, and sends the stable field synchronizing signal to the backlight constant current board if the judgment result is that the field synchronizing signal is stable.
In step S30, if the field sync signal is unstable, a fixed field sync signal is sent to the backlight constant current board.
If the field sync signal is unstable, the fixed field sync signal is sent to the backlight constant current board, and it should be understood that the fixed field sync signal may be a field sync signal pre-stored in the micro control unit.
The embodiment discloses a control method of a display device, wherein the display device comprises a main board, a micro control unit and a backlight constant current board, and the method is applied to the micro control unit and comprises the following steps: when the display device is detected to be powered on, receiving a field synchronization signal sent by the main board, and judging whether the field synchronization signal is stable; if the field synchronizing signal is stable, the field synchronizing signal is sent to a backlight constant current board; and if the field synchronizing signal is unstable, sending the fixed field synchronizing signal to a backlight constant current board. In this embodiment, a field synchronization signal sent by a main board is detected, and if the field synchronization signal is stable, the field synchronization signal is sent to a backlight constant current board; and sending a fixed preset signal to the backlight constant current board even if the field synchronization signal is unstable. Therefore, the backlight constant current board can always receive stable field synchronous signals when being electrified, and the backlight flicker phenomenon caused by the instability of the backlight constant current board at the moment of electrifying the display device is eliminated, so that the stability and the reliability of the display device are improved.
Further, the step of determining whether the field sync signal is stable includes:
step S11, detecting the frequency of the field sync signal, and determining whether the frequency of the field sync signal is a preset frequency;
step S12, if yes, determining that the field synchronization signal is stable;
and step S13, if not, determining that the field synchronization signal is unstable.
In this embodiment, whether the field sync signal is stable is determined by detecting the frequency of the field sync signal. Specifically, the frequency of the field synchronization signal may be acquired by a digital frequency acquisition method, the frequency of the field synchronization signal is acquired by one or more timers, and whether the acquired frequency of the field synchronization signal is a preset frequency is determined, and if the frequency of the field synchronization signal is consistent with the preset frequency, it is determined that the field synchronization signal is stable; and if the frequency of the field synchronizing signal is inconsistent with a preset frequency, determining that the field synchronizing signal is unstable. Preferably, the predetermined frequency is 60Hz or 50 Hz. In this embodiment, the frequency of the field sync signal is detected, and the frequency of the field sync signal is compared with the preset frequency, so as to accurately determine the stability of the field sync signal.
Further, the step of sending the fixed field synchronization signal to the backlight constant current board includes:
and step S31, setting the frequency of the fixed field synchronizing signal to be a preset frequency and then sending the preset frequency to a backlight constant current board.
In this embodiment, if the field sync signal sent by the main board is unstable, the micro control unit generates a fixed field sync signal, and sets the frequency of the fixed field sync signal to a preset frequency, as a preferred scheme, the frequency of the fixed field sync signal may be set to 60Hz or 50Hz, and then the fixed field sync signal is sent to the backlight constant current board, so as to ensure that the backlight constant current board is stable when the display device is powered on, and further solve the backlight flicker phenomenon at the moment of powering on, thereby improving the stability and reliability of the display device.
Further, referring to fig. 5, fig. 5 is a schematic flow chart of another embodiment of a control method of a display device according to the present invention after the display device is powered on and lighted, the display device further includes a backlight area, and the method further includes:
step S40, after the display device is turned on, reading the feedback voltage values of the corresponding leds in the backlight lamp area stored in each register in the backlight constant current board;
step S50, obtaining an average feedback voltage value according to all the feedback voltage values, and modifying the feedback voltage values stored in the registers to the average feedback voltage value to fix the input voltage of the backlight area.
It should be understood that the backlight constant current board in the present embodiment is provided with a plurality of registers, and the backlight area in the present embodiment is provided with a plurality of light emitting diodes, wherein each register in the backlight constant current board corresponds to a plurality of light emitting diodes in the backlight area, and each register stores a corresponding feedback signal voltage value. It is easily understood that the feedback signal for each led is different, and thus, the feedback voltage value stored in each register is also different. The existing backlight constant current board sends the maximum feedback voltage value to the power converter, and the power converter sends corresponding voltage to the backlight area according to the feedback voltage value, however, the voltage required by each light emitting diode is different, and the light emitting diode will output the redundant voltage to the negative end dimming MOS transistor in the backlight area, thereby causing the temperature rise of the display device and easily causing the damage of the device.
In this embodiment, after the display device is turned on, the feedback voltage values corresponding to the light emitting diodes and stored in the registers are read to obtain an average feedback voltage value, and then the feedback voltage values stored in the registers are modified into the average feedback voltage value. The voltage stabilizing mechanism of the input voltage of the backlight lamp area is increased through the mode, the input voltage of the backlight lamp area is fixed, the voltage drop on the negative end dimming MOS tube is reduced, the heat productivity of the display device is further reduced, and therefore the stability and the reliability of the display device are improved.
Further, the step of obtaining an average feedback voltage value according to all feedback voltage values includes:
step S51, reading the number of registers in the backlight constant current board, and adding all feedback voltage values to obtain a corresponding total feedback voltage value;
and step S55, dividing the total value of the feedback voltage by the number of the registers to obtain an average feedback voltage value.
In this embodiment, the micro control unit reads the feedback voltage value stored in each register, and adds all the feedback voltage values to obtain a corresponding total feedback voltage value, and at the same time, the micro control unit also reads the number of registers in the backlight constant current board, and divides the total feedback voltage value by the number of registers to obtain a corresponding average feedback voltage value. In the embodiment, the average feedback voltage value is accurately obtained according to the feedback voltage value and the number of the registers,
further, after all the steps, the method further comprises the following steps:
step S60, receiving an error signal sent by the failure of self-test of the backlight constant current board, and judging whether the error signal is a false trigger signal;
step S70, if the error signal is the false trigger signal, the backlight constant current board is restarted.
The backlight constant current board carries out self-checking in real time, detects the working state of the backlight constant current board, and sends an error signal to the micro control unit when a fault occurs. It should be understood that there are many situations where errors occur in the backlight constant current board, such as open-circuit of the light emitting diode, short-circuit of the light emitting diode, and input voltage sag, which all cause the self-test of the backlight constant current board to fail. And after receiving the error signal, the micro control unit judges whether the error signal is a false trigger signal.
When the error signal is the false trigger signal, the backlight constant current plate is restarted, and simultaneously, the timer in the backlight constant current plate can be reset, and the positioner is reset, so that the influence of the false trigger signal on the display device is eliminated, and the stability and the reliability of the display device are improved.
Further, referring to fig. 6, fig. 6 is a detailed flowchart of the step of determining whether the error signal is the false trigger signal according to the present invention, where the step of determining whether the error signal is the false trigger signal includes:
step S61, when the error signal is received again, acquiring the time difference between the two adjacent received error signals;
step S62, if the time difference is larger than the preset time, determining the error signal as a false trigger signal;
step S63, if the time difference is not greater than the preset time, determining that the error signal is not a false trigger signal.
In this embodiment, when an error signal is received again, the time difference between two adjacent received error signals is obtained, specifically, when a previous error signal is received, a timer in the micro control unit is started to time, when a subsequent error signal is received, the time recorded by the timer is read, the time is taken as the time difference between two adjacent error signals, and the timer is cleared at the same time. As a preferable scheme, the preset time in this embodiment may be set to 10 seconds, and it should be understood that when the time recorded by the timer is greater than 10 seconds, the subsequently received error signal is used as a false trigger signal; and when the time recorded by the timer is not more than 10 seconds, the error signal received subsequently is not taken as the false trigger signal.
In the embodiment, by the above manner, the time difference between two adjacent error signals is obtained, and whether the error signal is the false trigger signal is determined, and the error reporting mechanism of the display system is specified according to the actual situation of self-inspection of the backlight constant current board, so that the stability and reliability of the display device are improved.
Further, the step S60, after determining whether the error signal is the false trigger signal, includes:
step S70, if the error signal is not the false trigger signal, returning to the step: and when the error signals are received again, acquiring the time difference between the received two adjacent error signals, and turning off the display device until the error signals of the preset times are received in total.
In this embodiment, when the received error signal is not the false trigger signal, the state of the backlight constant current plate is monitored again, and when the received error signal is received again, the time difference between two adjacent error signals is calculated again, so as to determine whether the error signal is the false trigger signal, and if the error signal is the false trigger signal, the backlight constant current plate is restarted to protect the display device; and if the error signal is not the error trigger signal, continuously monitoring the state of the backlight constant current board. Until a total of a preset number of error signals are received, and the received error signals are not false trigger signals, which indicates that the error signals are generated due to a long-term fault of the display device, the display device is turned off after the preset number of error signals are received, and preferably, the preset number is set to 10.
To further elaborately explain the error reporting mechanism of the display device provided in this embodiment, the preset number of times is 4 for example:
the micro control unit receives an error signal sent by the backlight constant current plate, acquires the time difference between the first error signal and the second error signal when receiving the error signal for the second time, and continues to monitor the backlight constant current plate if the time difference is not greater than the preset time; when the micro control unit receives a third field error signal sent by the backlight constant current plate, acquiring a time difference between the second error signal and the third error signal, and if the time difference is not greater than preset time, continuing to monitor the backlight constant current plate; and when the micro control unit receives a fourth field error signal sent by the backlight constant current board, acquiring a time difference between the third error signal and the fourth error signal, and if the time difference is not greater than the preset time, closing the display device. It should be understood that, in the step of comparing the time difference with the preset time, as long as the time difference is greater than the preset time, the micro control unit does not monitor the backlight constant current board any more, and directly performs the restart operation on the backlight constant current board.
Through the mode, the error reporting mechanism of the display device is added, when the display device generates a fault through self-detection, whether the fault phenomenon is generated due to error touch or a fault existing for a long time is judged, so that the actual fault state of the display device is determined, different recovery operations are correspondingly executed according to the actual fault state of the display device, the fault is eliminated, and the stability of the display device is further improved.
Furthermore, an embodiment of the present invention also provides a computer-readable storage medium having a control program of a display apparatus stored thereon, where the control program of the display apparatus, when executed by a processor, implements the operations of the control method of the display apparatus as described above.
The specific embodiment of the computer-readable storage medium of the present invention is substantially the same as the embodiments of the control method of the display device, and is not repeated herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A control method of a display device is characterized in that the display device comprises a main board, a micro control unit and a backlight constant current board, and the method is applied to the micro control unit and comprises the following steps:
when the display device is detected to be powered on, receiving a field synchronization signal sent by a main board, and judging whether the field synchronization signal is stable;
if the field synchronizing signal is stable, the field synchronizing signal is sent to a backlight constant current board;
and if the field synchronizing signal is unstable, sending a fixed field synchronizing signal to a backlight constant current board.
2. The method for controlling a display device according to claim 1, wherein the step of determining whether the field sync signal is stable includes:
detecting the frequency of the field synchronization signal, and determining whether the frequency of the field synchronization signal is a preset frequency;
if yes, determining that the field synchronization signal is stable;
and if not, determining that the field synchronization signal is unstable.
3. The method of claim 2, wherein the step of sending the fixed field sync signal to the backlight constant current board comprises:
and setting the frequency of the fixed field synchronous signal to be a preset frequency and then sending the preset frequency to a backlight constant current board.
4. A method of controlling a display device according to any one of claims 1 to 3, wherein the display device further comprises a backlight area, the method further comprising:
after the display device is lightened, reading feedback voltage values of corresponding light emitting diodes in backlight lamp areas stored by registers in the backlight constant current board;
and obtaining an average feedback voltage value according to all the feedback voltage values, and modifying the feedback voltage values stored in the registers into the average feedback voltage value so as to fix the input voltage of the backlight area.
5. The method of controlling a display device according to claim 4, wherein the step of obtaining an average feedback voltage value from all the feedback voltage values comprises:
reading the number of registers in the backlight constant current board, and adding all feedback voltage values to obtain a corresponding total feedback voltage value;
and dividing the total value of the feedback voltage by the number of the registers to obtain an average feedback voltage value.
6. The control method of a display device according to any one of claims 1 to 3, further comprising, after all the steps:
receiving an error signal sent by the failure of self-detection of a backlight constant current board, and judging whether the error signal is a false trigger signal;
and if the error signal is a false trigger signal, restarting the backlight constant current plate.
7. The method for controlling a display device according to claim 6, wherein the step of determining whether the error signal is a false trigger signal comprises:
when the error signal is received again, acquiring the time difference between the received two adjacent error signals;
if the time difference is greater than the preset time, determining that the error signal is a false trigger signal;
and if the time difference is not greater than the preset time, determining that the error signal is not a false trigger signal.
8. The method for controlling a display device according to claim 7, wherein the step of determining whether the error signal is a false trigger signal comprises:
if the error signal is not the false trigger signal, returning to the step: and when the error signal is received again, acquiring the time difference between the received two adjacent error signals, and turning off the display device until the error signals are received for the preset times in total.
9. A television, the television comprising: a memory, a processor, and a control program of a display apparatus stored on the memory and executable on the processor, the control program of the display apparatus being configured to implement the steps of the control method of the display apparatus according to any one of claims 1 to 8.
10. A storage medium having stored thereon a control program for a display device, the control program for the display device realizing the steps of the control method for the display device according to any one of claims 1 to 8 when executed by a processor.
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| CN117765844A (en) * | 2023-12-29 | 2024-03-26 | 深圳创维显示技术有限公司 | Backlight abnormality detection method, equipment and storage medium based on regional dimming |
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| CN111010519B (en) | 2021-09-24 |
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