CN114399977B

CN114399977B - Backlight control method, circuit and display device

Info

Publication number: CN114399977B
Application number: CN202210181814.4A
Authority: CN
Inventors: 韩韶川; 袁海江
Original assignee: HKC Co Ltd; Chuzhou HKC Optoelectronics Technology Co Ltd
Current assignee: HKC Co Ltd; Chuzhou HKC Optoelectronics Technology Co Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2023-04-25
Anticipated expiration: 2042-02-25
Also published as: CN114399977A

Abstract

The application is applicable to the technical field of display, and provides a backlight control method, a circuit and display equipment, wherein the backlight control method comprises the following steps: during the starting-up process of the display device, detecting whether polarity inversion occurs to each frame of data voltage from the falling edge of the clock locking signal; and if the polarity of at least one frame of data voltage is reversed, controlling the backlight source component to be lightened. According to the embodiment of the application, the setting time from the falling edge of the latch enabling signal required by different display equipment to the power-on of the backlight source component can be adaptively adjusted according to the difference of the different display equipment, the starting time of the display equipment with shorter setting time can be shortened, the problems of screen flashing, ghost and the like can be effectively eliminated for the display equipment with longer setting time of the display equipment, and the display effect during starting is improved.

Description

Backlight control method, circuit and display device

Technical Field

The application belongs to the technical field of display, and particularly relates to a backlight control method, a circuit and display equipment.

Background

In the starting process of the display device, if a backlight module (BLU) is turned on before the Data voltage is not stably output, there is a risk of abnormal display phenomena such as screen flashing and residual image, and the display effect is seriously affected. To circumvent this risk, it is currently common practice to experimentally set the time from the falling edge of a different latch enable (LOCKN) signal to the power-up of the backlight assembly, then start up to detect whether the display device has a picture abnormality, and take the time set when there is no picture abnormality as the unique time from the falling edge of the latch enable signal to the power-up of the backlight assembly. In consideration of the differences of different types of display devices, a certain buffer time is generally added on the basis of the specific time, and the buffer time is taken as a setting time from the falling edge of the latch enabling signal to the power-on of the backlight source component.

However, in the existing setting time, the setting time is long because of considering the difference of different display devices, but in practice, most display devices do not need such long setting time, so that the starting time of the display devices is prolonged, and the time required by a small number of display devices is longer than the setting time, so that the problems of screen flashing, afterimage and the like of a small number of display devices cannot be solved.

Disclosure of Invention

In view of this, the embodiments of the present application provide a backlight control method, a circuit and a display device, so as to solve the existing setting time, and because the setting time is long in consideration of the differences of different display devices, in practice, most display devices do not need such long setting time, resulting in an extended startup time of the display devices, and there are also a small number of display devices that need a time longer than the setting time, which results in the problem that the display device cannot be used for solving the problems of screen flash, ghost, etc. of the display device.

A first aspect of an embodiment of the present application provides a backlight control method, including:

during the starting-up process of the display device, detecting whether polarity inversion occurs to each frame of data voltage from the falling edge of the clock locking signal;

and if the polarity of at least one frame of data voltage is reversed, controlling the backlight source component to be lightened.

In one embodiment, the controlling the backlight module to light up if the polarity of the at least one frame data voltage is reversed includes:

if polarity inversion of the preset number of frame data voltages is continuously detected, the backlight source assembly is controlled to be lightened, and the value range of the preset number is 3-5.

In one embodiment, during the power-on process of the display device, detecting whether polarity inversion occurs in each frame of data voltage from a falling edge of the clock locking signal includes:

in the starting-up process of the display device, detecting the data voltage output by one data channel of the data driving module in each frame from the falling edge of the clock locking signal;

determining the polarity of the data voltage output by the data channel in each frame according to the size of the data voltage output by the data channel in each frame;

and if the polarities of the data voltages output by the data channels in at least two continuous frames are different, determining that at least one frame of data voltage is subjected to polarity inversion.

in the starting-up process of the display device, comparing the public voltage with the data voltage output by one data channel of the data driving module in each frame from the falling edge of the clock locking signal to generate a comparison result corresponding to the data voltage output by the data channel in each frame;

determining the polarity of the data voltage output by the data channel in each frame according to the comparison result corresponding to the data voltage output by the data channel in each frame;

in the starting-up process of the display device, obtaining a difference value between the public voltage and the data voltage output by one data channel of the data driving module in each frame from a first moment;

determining the polarity of the data voltage output by the data channel in each frame according to the difference value between the common voltage and the data voltage output by the data channel in each frame;

A second aspect of embodiments of the present application provides a backlight control circuit, including:

the voltage detection module is electrically connected with the data driving module and is used for detecting whether polarity inversion occurs to each frame of data voltage from the falling edge of the clock locking signal in the starting process of the display equipment;

the time sequence control module is electrically connected with the voltage detection module and the backlight source component and is used for controlling the backlight source component to be lightened through the main control module if at least one frame of data voltage is subjected to polarity inversion.

In one embodiment, the voltage detection module comprises:

the voltage detection unit is electrically connected with one data channel of the data driving module and is used for detecting the data voltage output by the data channel in each frame from the falling edge of the clock locking signal in the starting process of the display equipment;

the polarity determining unit is electrically connected with the voltage detecting unit and the time sequence control module and is used for:

In one embodiment, the voltage detection module comprises:

the voltage comparison unit is electrically connected with one data channel of the data driving module and the public voltage generation module and is used for comparing the public voltage with the data voltage output by the data channel in each frame from the falling edge of the clock locking signal in the starting process of the display equipment to generate a comparison result corresponding to the data voltage output by the data channel in each frame;

the polarity determining unit is electrically connected with the voltage comparing unit and the time sequence control module and is used for:

In one embodiment, the voltage detection module comprises:

the subtracting unit is electrically connected with one data channel of the data driving module and the public voltage generating module and is used for acquiring the difference value between the public voltage and the data voltage output by the data channel in each frame from the falling edge of the clock locking signal in the starting process of the display equipment;

the polarity determining unit is electrically connected with the subtracting unit and the time sequence control module and is used for:

A third aspect of the embodiments of the present application provides a display device, including a main control module, a data driving module, a backlight assembly, and a backlight control circuit of the second aspect.

In the backlight control method according to the first aspect of the embodiments of the present application, during a power-on process of a display device, whether polarity inversion occurs in each frame of data voltage is detected from a falling edge of a clock locking signal; if polarity inversion occurs in at least one frame of data voltage, the backlight source component is controlled to be lightened, whether the data voltage is stably output or not can be determined by detecting whether polarity inversion occurs in each frame of data voltage, and when polarity inversion occurs in at least one frame of data voltage, the data voltage is stably output and the backlight source component is controlled to be lightened, so that the setting time required by different display devices can be adaptively adjusted according to the difference of different display devices, the starting time can be shortened for the display device with shorter setting time, the problems of screen flashing, residual shadows and the like can be effectively eliminated for the display device with longer setting time required by the display device, and the display effect during starting is improved.

It will be appreciated that the advantages of the second and third aspects may be found in the relevant description of the first aspect and are not described in detail herein.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a timing chart of a switching on/off process of a display device according to an embodiment of the present disclosure;

fig. 2 is a flowchart of a backlight control method according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of a first configuration of a backlight control circuit according to a second embodiment of the present disclosure;

fig. 4 is a schematic diagram of a second configuration of a backlight control circuit according to a second embodiment of the present disclosure;

fig. 5 is a schematic diagram of a third configuration of a backlight control circuit according to a second embodiment of the present disclosure;

fig. 6 is a schematic diagram of a fourth configuration of a backlight control circuit according to a second embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a display device according to a third embodiment of the present application.

Reference numerals:

the device comprises a 100-backlight control circuit, a 1-voltage detection module, a 2-data driving module, a 3-time sequence control module, a 4-backlight source component, a 5-main control module, a 6-common voltage generation module, an 11-voltage detection unit, a 12-polarity determination unit, a 13-voltage comparison unit and a 14-subtraction unit.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

It should also be 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.

Furthermore, the terms "first," "second," "third," and the like in the description of the present specification and in the appended claims, are used for distinguishing between descriptions and not necessarily for indicating or implying a relative importance.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the invention. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

Example 1

An embodiment of the present invention provides a backlight control method, which is applied to a display device and can be executed by a data driving board and a timing control board of the display device.

In applications, the display device generally includes a power panel, a voltage source conversion panel, a main board, a timing control panel, a display panel, a data driving panel, a scan driving panel, a backlight assembly, a high voltage board, and the like. The voltage source conversion board comprises a voltage source conversion circuit and is used for providing working voltage for a main board, a time sequence control board, a data driving board, a scanning driving board, a high-voltage board and the like and generating common voltage. The motherboard comprises a Transition-minimized differential signaling (TMDS) receiver, an analog-to-digital converter, a clock generator, a master control chip (Scaler), a microcontroller circuit, a low voltage differential signaling (Low Voltage Differential Signaling, LVDS) transmitter and the like. The microcontroller circuit typically includes a micro control unit (Microcontroller Unit, MCU) and memory, etc. The timing control board includes timing controller (TCON, timing Controller), data clock recovery (Clock and Data Recovery, CDR) circuits, and the like. The data driving board includes a data driving module, which may be a Source Driver Chip (Source Driver IC) or a thin Film Source Driver Chip (S-COF), etc. The scan driving board includes a Gate driving module, which may be a Gate driving Chip (Gate Driver IC) or a thin Film Gate driving Chip (G-COF), etc. The high voltage board may include an inverter circuit for supplying power to the backlight assembly.

As in fig. 1, the timing of the power on and off process of the display device is exemplarily shown; the time periods TI to T6 are defined as follows:

t1 is a signal transition time (transition time), which is a time required for a Voltage (VLCD) of a timing control board of the display device to rise from 10% vcc to 90% vcc after the main board is powered on when the power supply of the power supply board is turned on, and the duration of T1 is typically 0.5ms (milliseconds) to 10ms, and vcc is typically 12V;

t2 is the time from the stabilization of VLCD (100% VCC) to the start of inputting LVDS valid data (VALID DATA) by the time sequence control board when the power supply is started, and the duration of T2 is usually 20 ms-50 ms;

t3 refers to the time from when the time sequence control board stops inputting LVDS valid data to when the VLCD starts powering down when the power supply of the power supply board is turned off, and the duration of T3 is usually 100 ms-500 ms;

t4 refers to the time that the VLCD takes from this power down (i.e., down to 10% vcc) to the next start of power up, the duration of T4 typically being 1000ms;

t5 is the time from the start of inputting LVDS valid data to the lighting of the backlight source component when the power supply is turned on, and the duration of T4 is usually 1000ms;

t6 refers to the time from when the backlight assembly is turned off to when the timing control board stops inputting LVDS valid data when the power is turned off, and the duration of T6 is typically 100ms.

In application, after VLCD is stabilized, the timing control board generates two signals to the motherboard, one is a high-level hot plug detection Signal (Hot Plug Detect Signal) HTPDN, the other is a clock Lock Signal (CDR Lock Signal) LOCKN, after the data clock recovery circuit of the timing control board works normally, the HTPDN Signal is pulled down by the timing control board, after the motherboard detects the low level of the HTPDN Signal, the clock Signal is sent to the timing control board, after the data clock recovery circuit locks the clock, the timing control board pulls down the LOCKN Signal, after the motherboard detects the low level of the LOCKN Signal, the motherboard sends LVDS to the timing control board, and the timing data board controls the data driving board to output the data voltage to the display panel when receiving the LVDS. The falling edge starting time of the LOCKN signal is the starting time of the time T5.

As shown in fig. 2, the backlight control method provided in the first embodiment of the present application includes the following steps S101 and S102:

step S101, during the starting-up process of the display device, detecting whether polarity inversion occurs to each frame of data voltage from the falling edge of the clock locking signal;

step S102, if at least one frame data voltage is polarity reversed, the backlight module is controlled to be lighted.

In application, when the data driving module stably outputs the data voltage to the display panel, polarity switching is performed between the front and rear frame data voltages, which is called polarity inversion, so that whether the data voltage is stably output can be determined by detecting whether each frame of data voltage is polarity-inverted from the falling edge of LOCKN, and once the polarity inversion of one frame of data voltage is detected, the stable output of the data voltage can be determined and the backlight module can be controlled to be lightened. When the data voltage output by the data driving module is unstable, abnormal display phenomena such as screen flashing and afterimage occur in the display device when the backlight component is lightened, so that the backlight component is required to be lightened after the data driving module stably outputs the data voltage.

In application, for the display device adopting the data voltage modulation driving mode, the common voltage is fixed, the difference between the data voltage and the common Voltage (VCOM) is a negative value, or when the data voltage is larger than the minimum data voltage and smaller than the common voltage, the data voltage is considered to be negative; the difference between the data voltage and the common voltage is a positive value, or the data voltage is considered to be positive when the data voltage is greater than the common voltage and less than the maximum data voltage. Therefore, the polarity of the data voltage may be determined by detecting the data voltage, comparing the magnitude between the data voltage and a preset maximum data voltage, minimum data voltage, or common voltage, or calculating a difference between the data voltage and the common voltage; then, whether polarity inversion occurs is determined according to whether polarities of the front and rear frame data voltages are the same.

In one embodiment, step S102 includes:

In order to improve accuracy, the data voltage may be considered to be stably output when polarity inversion of a plurality of frames of data voltages is continuously detected, and the backlight module may be controlled to be turned on, for example, the data voltage may be considered to be stably output when polarity inversion of 3 to 5 frames of data voltages is continuously detected. The preset number can be set according to actual needs, and 3 to 5 are only specific examples exemplified in the application, and do not limit the value range of the preset number.

In one embodiment, step S101 includes the steps of:

determining the polarity of the data voltage output by one data channel in each frame according to the size of the data voltage output by the one data channel in each frame;

if the polarities of the data voltages output by at least two continuous frames of data channels are different, determining that at least one frame of data voltage has polarity inversion.

In application, the data driving module includes a plurality of data channels, each data channel is used for outputting a data voltage to a column of sub-pixels of the display panel, when the data driving module outputs a stable data voltage to drive the display panel to display each frame of picture, the polarities of the data voltages output by each data channel when the display panel displays two frames of pictures before and after the display panel are different, and only the polarity inversion of the data voltage output by one data channel is determined, the polarity inversion of one frame of data voltage output by the whole data driving module can be determined. Therefore, only by detecting the magnitude of the data voltage output by one data channel of the data driving module in each frame and comparing with the preset maximum data voltage, minimum data voltage or common voltage, the polarity of the data voltage output by one data channel in each frame can be determined, and then whether the polarity of the data voltage output by the data channel in the front and rear frames is changed or not is determined, so that whether the polarity of each frame of data voltage is inverted or not is determined.

In application, the data voltage output by one data channel in each frame can be detected by the voltage detection unit and sent to the polarity determination unit, and the polarity determination unit compares the data voltage output by one data channel in each frame with a pre-stored maximum data voltage, minimum data voltage or common voltage to determine whether polarity inversion occurs in each frame of data voltage. The voltage detection unit may be implemented by a voltage acquisition chip or a circuit, for example, a sampling resistor. The polarity determination unit may be implemented by a central processing unit (Central Processing Unit, CPU), other general purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

In one embodiment, step S101 includes the steps of:

in the starting-up process of the display device, comparing the public voltage with the data voltage output by one data channel of the data driving module in each frame from the falling edge of the clock locking signal to generate a comparison result corresponding to the data voltage output by one data channel in each frame;

determining the polarity of the data voltage output by one data channel in each frame according to the comparison result corresponding to the data voltage output by the data channel in each frame;

In application, the common voltage and the data voltage output by one data channel in each frame can be obtained and compared by the voltage comparison unit, a comparison result corresponding to the data voltage output by one data channel in each frame is generated and sent to the polarity determination unit, and the polarity determination unit compares the comparison result corresponding to the data voltage output by one data channel in each frame with the obtained common voltage to determine whether polarity inversion occurs in each frame of data voltage. The voltage comparison unit may be implemented by a voltage comparison chip, a voltage comparator or a corresponding circuit.

In one embodiment, step S101 includes the steps of:

determining the polarity of the data voltage output by one data channel in each frame according to the difference value between the common voltage and the data voltage output by one data channel in each frame;

In application, the difference between the common voltage and the data voltage output by one data channel per frame can be obtained and calculated by the subtracting unit and sent to the polarity determining unit, and the polarity determining unit determines whether polarity inversion occurs to the data voltage per frame according to the positive and negative of the difference between the common voltage and the data voltage output by one data channel per frame. The subtracting unit may be implemented by a subtracting chip, a subtractor or a corresponding circuit.

In the application, by only collecting the data voltage output by one data channel of the data driving module, whether polarity inversion occurs to each frame of data voltage is determined, so that the data processing amount can be reduced, the recognition efficiency is improved, the lighting of a backlight source component is controlled to be accelerated, the time T5 is shortened, and the starting time is shortened; meanwhile, the number of voltage detection units, voltage comparison units or subtraction units for collecting data voltages can be reduced, and the circuit structure is simplified.

Example two

As shown in fig. 3, a second embodiment of the present application provides a backlight control circuit 100, including:

the voltage detection module 1 is electrically connected with the data driving module 2 and is used for detecting whether polarity inversion occurs to each frame of data voltage from the falling edge of the clock locking signal in the starting process of the display equipment;

the time sequence control module 3 is electrically connected with the voltage detection module 1 and the backlight source component 4, and is used for controlling the backlight source component 4 to be lightened through the main control module 5 if at least one frame of data voltage is subjected to polarity inversion.

In application, the voltage detection module and the data driving module can be integrally arranged on the data driving board as a part of the data driving board. The time sequence control module can be a time sequence controller, and the main control module can be a main control chip.

In application, the voltage detection module is arranged in the backlight control circuit, and the voltage detection module is utilized to detect whether polarity inversion occurs in each frame of data voltage from the falling edge of the clock locking signal, so that the time sequence controller can determine whether the data voltage is stably output or not, once the polarity inversion occurs in one frame of data voltage is detected, the stable output of the data voltage can be determined, and the backlight source component is controlled to be lightened, so that the T5 time required by display equipment applied by the backlight control circuit can be adjusted according to actual needs, the problems of screen flashing, residual shadow and the like are effectively eliminated, the display effect during starting is improved, and the device is simple in structure and easy to realize. As shown in fig. 4, in one embodiment, the voltage detection module 1 includes:

the voltage detection unit 11 is electrically connected with one data channel of the data driving module 2, and is used for detecting the data voltage output by one data channel in each frame from the falling edge of the clock locking signal in the starting process of the display device;

the polarity determining unit 12 is electrically connected to the voltage detecting unit 11 and the timing control module 3, and is configured to:

As shown in fig. 5, in one embodiment, the voltage detection module 1 includes:

the voltage comparing unit 13 is electrically connected with one data channel of the data driving module 2 and the common voltage generating module 6, and is used for comparing the magnitude of the common voltage with the magnitude of the data voltage output by one data channel in each frame from the falling edge of the clock locking signal in the starting process of the display device, and generating a comparison result corresponding to the data voltage output by one data channel in each frame;

the polarity determining unit 12 is electrically connected to the voltage comparing unit 13 and the timing control module 3, and is configured to:

In application, the common voltage generation module may be a voltage source conversion circuit or a part of a sub-circuit in a voltage source conversion circuit.

As shown in fig. 6, in one embodiment, the voltage detection module 1 includes:

the subtracting unit 14 is electrically connected with one data channel of the data driving module 2 and the common voltage generating module 6, and is used for acquiring a difference value between the common voltage and the data voltage output by one data channel in each frame from the falling edge of the clock locking signal in the starting process of the display device;

the polarity determining unit 12 is electrically connected to the subtracting unit 14 and the timing control module 3, and is configured to:

In application, the voltage detection module and the data driving module are integrally arranged on the data driving board together, so that the starting time can be shortened under the condition that the volume of the display equipment is not obviously increased as a part of the data driving board.

In application, the voltage detection module can be realized by at least one of a voltage detection unit and a polarity determination unit, a voltage comparison unit and a polarity determination unit, and a subtraction unit and a polarity determination unit, and the three modes have the advantages of simple structure, low cost and easy assembly and wiring, and can be selected according to actual needs.

Example III

As shown in fig. 7, a display device according to a third embodiment of the present application includes a data driving module 2, a backlight assembly 4, a main control module 5, and a backlight control circuit 100 according to a second embodiment.

In application, the display device may include, but is not limited to, a data driving module, a backlight assembly, a main control module, and the backlight control circuit in the second embodiment, and may further include other components mentioned in the first embodiment and the second embodiment. It will be appreciated by those skilled in the art that the present embodiment is merely an example of a display device, and does not constitute a limitation of the display device, and may further include more or fewer components, or may combine certain components, or different components, for example, may further include an input/output device, a network access device, a memory, a bus, and the like. The input output devices may include power interfaces, indicator lights, and the like. The network access device may include a communication module.

In application, the display device may be a television, desktop computer, notebook computer, multimedia advertisement player, etc. The display device may be a liquid crystal display device (Liquid Crystal Display, LCD) which may be a thin film transistor liquid crystal display (Thin Film Transistor Liquid Crystal Display, TFT-LCD) device.

In application, the communication module can be set as any wired or wireless communication device according to actual needs. The communication module may provide solutions for communication including wireless local area network (Wireless Localarea Networks, WLAN) (e.g., wi-Fi network), bluetooth, zigbee, mobile communication network, global navigation satellite system (Global Navigation Satellite System, GNSS), frequency modulation (Frequency Modulation, FM), near field wireless communication technology (Near Field Communication, NFC), infrared technology (IR), etc. for application on a network device. The communication module may include an antenna, which may have only one element, or may be an antenna array including a plurality of elements. The communication module can receive electromagnetic waves through the antenna, frequency-modulate and filter the electromagnetic wave signals, and send the processed signals to the main control module. The communication module can also receive the signal to be transmitted from the main control module, frequency modulate and amplify the signal, and convert the signal into electromagnetic waves through the antenna to radiate.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. 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 application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other manners. For example, the apparatus/terminal device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated modules, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the present application may implement all or part of the flow of the method of the above embodiment, or may be implemented by instructing related hardware by a computer program, where the computer program may be stored in a computer readable storage medium, and the computer program may implement the steps of each method embodiment when executed by a drive board. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims

1. A backlight control method, comprising:

2. The backlight control method according to claim 1, wherein controlling the backlight module to be turned on if the polarity of the at least one frame data voltage is reversed comprises:

3. The backlight control method according to claim 1 or 2, wherein the detecting whether polarity inversion occurs per frame of data voltage from a falling edge of the clock lock signal during the power-on of the display device comprises:

4. The backlight control method according to claim 1 or 2, wherein the detecting whether polarity inversion occurs per frame of data voltage from a falling edge of the clock lock signal during the power-on of the display device comprises:

5. The backlight control method according to claim 1 or 2, wherein the detecting whether polarity inversion occurs per frame of data voltage from a falling edge of the clock lock signal during the power-on of the display device comprises:

6. A backlight control circuit, comprising:

7. The backlight control circuit of claim 6, wherein the voltage detection module comprises:

8. The backlight control circuit of claim 6, wherein the voltage detection module comprises:

9. The backlight control circuit of claim 6, wherein the voltage detection module comprises:

10. A display device comprising a main control module, a data driving module, and a backlight assembly, and further comprising the backlight control circuit of any one of claims 6 to 9.