CN114399977A

CN114399977A - Backlight control method and circuit and display device

Info

Publication number: CN114399977A
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: 2022-04-26
Anticipated expiration: 2042-02-25
Also published as: CN114399977B

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: in the starting process of the display equipment, whether polarity inversion occurs to each frame of data voltage is detected from the falling edge of a 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 latch enabling signal required by different display devices can be adaptively adjusted according to the difference of the different display devices, the set time from the falling edge to the power-on of the backlight source component can be shortened for the display device with shorter required set time, the problems of screen flashing, ghost and the like can be effectively eliminated for the display device with longer required set time, and the display effect during starting is improved.

Description

Backlight control method and 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 process of starting up the display device, if a backlight Unit (BLU) is lit before the Data voltage is not stably output, there is a risk of abnormal display phenomena such as screen flashing and image sticking, which seriously affects the display effect. In order to avoid this risk, it is currently common practice to set the time from the falling edge of a different latch enable (LOCKN) signal to the power-on of the backlight assembly through experiments, then to detect whether the display device has a screen abnormality by starting up, and to take the time set when there is no screen abnormality as the specific time from the falling edge of the latch enable signal to the power-on of the backlight assembly. In consideration of the differences of different models of display devices, a certain buffering time is usually added on the basis of the specific time to serve as a set time from the falling edge of the latch enable signal to the power-on of the backlight assembly.

However, the existing setting time is long due to the consideration of the difference of different display devices, and in fact, most display devices do not need such long setting time, which results in the extension of the startup time of the display devices, and the problem that the time needed by a small number of display devices is longer than the setting time, which results in the failure to solve the problems of screen flashing, image sticking and the like of the small number of display devices.

Disclosure of Invention

In view of this, embodiments of the present application provide a backlight control method, a backlight control circuit, and a display device, so as to solve the problem that, in the existing method for setting time, the setting time is long due to consideration of differences of different display devices, and in fact, most display devices do not need the long setting time, which results in an extended power-on time of the display device, and a problem that a small amount of display devices need time longer than the setting time, which results in a failure to solve the problems of screen flashing, image sticking, and the like of the small amount of display devices.

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

in the starting process of the display equipment, whether polarity inversion occurs to each frame of data voltage is detected from the falling edge of a 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 assembly to be turned on if the polarity of the at least one frame of data voltage is reversed includes:

and if the polarity reversal of the frame data voltage of the preset number is continuously detected, controlling the backlight source assembly to be lightened, wherein the value range of the preset number is 3-5.

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

in the starting process of the display equipment, 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 magnitude of the data voltage output by the data channel in each frame;

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

in the starting process of the display device, comparing the magnitude between the common voltage and 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, and generating 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 a comparison result corresponding to the data voltage output by the data channel in each frame;

in the starting process of the display equipment, the difference value between the common voltage and the data voltage output by one data channel of the data driving module in each frame is obtained from the first moment;

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

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

the voltage detection module is electrically connected with the data driving module and 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;

and 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 the polarity of at least one frame of data voltage is reversed.

In one embodiment, the voltage detection module includes:

the voltage detection unit is electrically connected with one data channel of the data driving module and 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 includes:

the voltage comparison unit is electrically connected with one data channel of the data driving module and the common voltage generation module and is used for comparing the common 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 and generating 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 includes:

the subtraction unit is electrically connected with one data channel of the data driving module and the common voltage generation module and is used for acquiring a difference value between the common 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;

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

In the first aspect of the embodiments of the present application, in the start-up process of the display device, whether polarity inversion occurs in each frame of data voltage is detected from a falling edge of a clock locking signal; if the polarity of at least one frame of data voltage is reversed, the backlight source assembly is controlled to be lightened, whether the data voltage is stably output or not can be determined by detecting whether the polarity of each frame of data voltage is reversed or not, the stable output of the data voltage is determined when the polarity of at least one frame of data voltage is reversed, the backlight source assembly is controlled to be lightened, the setting time required by different display equipment can be adaptively adjusted according to the difference of different display equipment, the startup time can be shortened for the display equipment with shorter required setting time, the problems of screen flashing, ghost and the like can be effectively eliminated for the display equipment with longer required setting time, and the display effect during startup is improved.

It is understood that, the beneficial effects of the second aspect and the third aspect can be referred to the related description of the first aspect, and are not described herein again.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a timing diagram illustrating a power-on and power-off process of a display device according to an embodiment of the present disclosure;

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

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

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

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

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

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

Reference numerals:

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

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the 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 this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

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

Reference throughout this 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 present invention. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.

Example one

The embodiment of the application provides a backlight control method, which is applied to a display device and can be executed by a data driving board and a time sequence control board of the display device.

In application, the display device generally includes a power board, a voltage source converter board, a main board, a timing control board, a display panel, a data driving board, a scan driving board, 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 the main board, the time sequence control board, the data drive board, the scanning drive board, the high-voltage board and the like, and also used for generating public voltage. The main board includes a Transition-modulated Differential Signaling (TMDS) receiver, an analog-to-digital converter, a clock generator, a main control chip (Scaler), a microcontroller circuit, and a Low Voltage Differential Signaling (LVDS) transmitter. The Microcontroller circuit generally includes a Microcontroller Unit (MCU) and a memory, etc. The Timing control board includes a Timing Controller (TCON), a Data Clock Recovery (CDR) circuit, and the like. The data driving board comprises a data driving module, and the data driving module can be a Source Driver IC (Source Driver IC) or a thin Film Source Driver IC (S-COF, Source-Chip on Film) and the like. The scan driving board includes a Gate driving module, which may be a Gate Driver IC (Gate Driver IC) or a thin Film Gate Driver IC (G-COF, Gate-Chip on Film), etc. The high voltage board may include an inverter circuit for supplying power to the backlight assembly.

Fig. 1 is a timing chart schematically showing the power-on and power-off processes of the display device; wherein, the time period TI-T6 is defined as follows:

t1 is a signal transition time (transition time), which is the time required for the Voltage (VLCD) of the timing control board of the display device to rise from 10% VCC to 90% VCC after the main board is powered on, the duration of T1 is usually 0.5ms (millisecond) to 10ms, and VCC is usually 12V;

t2 is the time from the time when VLCD is stable (100% VCC) to the time when the timing control board starts to input LVDS valid data (VALID DATA), and the duration of T2 is usually 20ms to 50 ms;

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

t4 refers to the time from this power down (i.e., down to 10% VCC) to the next power up of the VLCD, and the duration of T4 is typically 1000 ms;

t5 is the time from when the timing control board starts to input LVDS valid data to when the power is turned on, and the duration of T4 is usually 1000 ms;

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

In application, after the VLCD is stabilized, the time sequence control board generates two signals to the main board, one is a Hot Plug Detect Signal (Hot Plug Detect Signal) HTPDN with high level, the other is a clock Lock Signal (CDR Lock Signal) LOCKN, after a data clock recovery circuit of the time sequence control board works normally, the HTPDN Signal is pulled down by the time sequence control board, the main board sends a clock Signal to the time sequence control board after detecting the low level of the HTPDN Signal, after the data clock recovery circuit locks the clock, the time sequence control board pulls down the LOCKN Signal, the main board sends LVDS to the time sequence control board after detecting the low level of the KNLOC Signal, and the time sequence data board controls the data drive board to output data voltage to the display panel when receiving the LVDS. The start time of the falling edge of the LOCKN signal is the start time of time T5.

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

step S101, in the starting process of the display device, whether polarity inversion occurs to each frame of data voltage is detected from the falling edge of a clock locking signal;

step S102, if at least one frame data voltage generates polarity inversion, controlling the backlight source component to be lightened.

In application, when the data driving module stably outputs the data voltage to the display panel, polarity switching, called as polarity inversion, occurs between two frames of data voltages before and after the data driving module, so that whether the data voltage is stably output can be determined by detecting whether the polarity inversion occurs to each frame of data voltage from a falling edge of LOCKN, and once the polarity inversion occurs to one frame of data voltage, the stable output of the data voltage can be determined and the backlight source component is controlled to be turned on. The data voltage output by the data driving module is not stable, and if the backlight source assembly is turned on, abnormal display phenomena such as screen flashing, image sticking and the like occur in the display device.

In application, for a display device adopting a data voltage modulation driving method, the common voltage is fixed, and the difference between the data voltage and the common Voltage (VCOM) is a negative value, or when the data voltage is greater than the minimum data voltage and less than the common voltage, the data voltage is considered as a negative polarity; the difference between the data voltage and the common voltage is a positive value, or the data voltage is considered to be a positive polarity 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, a minimum data voltage, or a 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 data voltages of the previous and next two frames are the same.

In one embodiment, step S102 includes:

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

In an application, in order to improve accuracy, when polarity inversion of a plurality of frames of data voltages is continuously detected, the data voltages are considered to be stably output and the backlight module is controlled to be turned on, for example, when polarity inversion of 3-5 frames of data voltages is continuously detected, the data voltages are considered to be stably output. The preset number can be set according to actual needs, and 3-5 is only one specific example exemplified in the application and does 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 magnitude of the data voltage output by one data channel in each frame;

and if the polarities of the data voltages output by at least two continuous frames of the data channel are different, determining that the polarity of at least one frame of data voltage is reversed.

In application, the data driving module comprises a plurality of data channels, each data channel is used for outputting data voltage to a column of sub-pixels of the display panel, when the data driving module outputs stable data voltage to drive the display panel to display each frame of picture, the polarities of the data voltage output by each data channel when the display panel displays two frames of picture are different, and the polarity inversion of the data voltage output by the whole data driving module can be determined only by determining the polarity inversion of the data voltage output by one data channel. Therefore, the polarity of the data voltage output by one data channel in each frame can be determined only by detecting the magnitude of the data voltage output by one data channel of the data driving module in each frame and comparing the magnitude of the data voltage with the preset maximum data voltage, minimum data voltage or common voltage, and then whether the polarity of the data voltage output by the data channel in two frames before and after is changed is determined, so that whether the polarity of the data voltage in each frame is reversed is determined.

In application, the voltage detection unit may detect a data voltage output by one data channel per frame and send the detected data voltage to the polarity determination unit, and the polarity determination unit may compare the data voltage output by one data channel per frame with a pre-stored maximum data voltage, minimum data voltage or common voltage to determine whether polarity inversion occurs in the data voltage per frame. The voltage detection unit may be implemented by a voltage acquisition chip or circuit, for example, a sampling resistor. The polarity determination Unit may be implemented by a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, 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 process of the display device, the size between the common voltage and the data voltage output by one data channel of the data driving module in each frame is compared from the falling edge of the clock locking signal, and a comparison result corresponding to the data voltage output by one data channel in each frame is generated;

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

In application, the voltage comparison unit can be used for acquiring and comparing the common voltage with the data voltage output by one data channel in each frame, generating a comparison result corresponding to the data voltage output by one data channel in each frame and sending the comparison result to the polarity determination unit, and the polarity determination unit is used for comparing the comparison result corresponding to the data voltage output by one data channel in each frame with the acquired common voltage to determine whether polarity inversion occurs to each frame of data voltage. The voltage comparing unit may be implemented by a voltage comparing 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 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 in each frame can be obtained and calculated by the subtraction unit and sent to the polarity determination unit, and whether the polarity inversion occurs in each frame of data voltage is determined by the polarity determination unit according to the positive and negative of the difference between the common voltage and the data voltage output by one data channel in each frame. The subtraction unit may be implemented by a subtraction chip, a subtractor or a corresponding circuit.

In application, whether each frame of data voltage is subjected to polarity inversion is determined by only collecting the data voltage output by one data channel of the data driving module, so that the data processing amount can be reduced, the identification efficiency is improved, the control on the lighting of a backlight source component is accelerated, and the T5 time is shortened, thereby shortening the starting time; 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;

and 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 the polarity of at least one frame of data voltage is reversed.

In application, the voltage detection module and the data driving module may be integrally disposed on the data driving board together 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 used for detecting whether polarity inversion occurs to each frame of data voltage from the falling edge of the clock locking signal, so that the time schedule controller can determine whether the data voltage is stably output, and once the polarity inversion occurs to one frame of data voltage, 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 the display equipment applied by the backlight control circuit can be adjusted according to actual needs, the problems of screen flashing, ghost shadow and the like are effectively eliminated, the display effect during starting is improved, the structure is simple, and the realization is easy. 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 the 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 comparison unit 13 is electrically connected with one data channel of the data driving module 2 and the common voltage generation module 6, and is used for comparing the magnitude between the common 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 device to generate a comparison result corresponding to the data voltage output by the 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 an application, the common voltage generation module may be a voltage source conversion circuit or a part of a sub-circuit in the voltage source conversion circuit.

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

the subtraction unit 14 is electrically connected to one data channel of the data driving module 2 and the common voltage generating module 6, and is configured to obtain, from a falling edge of the clock locking signal, a difference between the common voltage and a data voltage output by the data channel in each frame during a power-on process of the display device;

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

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

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

EXAMPLE III

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

In application, the display device may include, but is not limited to, the data driving module, the backlight source assembly, the 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 understood by those skilled in the art that the present embodiment is only an example of a display device, and does not constitute a limitation to the display device, and may include more or less components, or combine some components, or different components, for example, an input/output device, a network access device, a memory, a bus, etc. The input and 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, a desktop computer, a notebook computer, a multimedia advertisement machine, and the like. The Display device may be a Liquid Crystal Display (LCD) device, and the Liquid Crystal Display device may be a 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 a solution for Communication applied to the network device, including Wireless Local Area Networks (WLANs) (e.g., Wi-Fi Networks), bluetooth, Zigbee, mobile Communication Networks, Global Navigation Satellite Systems (GNSS), Frequency Modulation (FM), Near Field Communication (NFC), Infrared (IR), and the like. The communication module may include an antenna, and the antenna may have only one array element, or may be an antenna array including a plurality of array elements. The communication module can receive electromagnetic waves through the antenna, frequency modulation and filtering processing are carried out on electromagnetic wave signals, and the processed signals are sent to the main control module. The communication module can also receive a signal to be sent from the main control module, frequency-modulate and amplify the signal, and convert the signal into electromagnetic waves through the antenna to radiate the electromagnetic waves.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of 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 processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

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

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 implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present 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 ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated module, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method of the embodiments described above can be realized by a computer program, which can be stored in a computer readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a driver board. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. A backlight control method, comprising:

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

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

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

5. The backlight control method of claim 1 or 2, wherein the detecting whether the polarity inversion occurs in the data voltage per frame from a falling edge of the clock locking 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 source assembly, further comprising the backlight control circuit of any one of claims 6 to 9.