Programming Method, Programming Device, Programming System and Display Device

Abstract

The present disclosure provides a programming method, a programming device, a programming system, and a display device. Among them, the programming method is applied to a driving chip of a liquid crystal display panel. The programming method includes: in response to the input of a power supply voltage signal, determining the historical programming times of the common voltage value in the driving chip; if the historical programming times are less than or equal to a preset number of times, controlling the liquid crystal display panel to display a first preset screen; wherein, the first preset screen is the screen displayed by the liquid crystal display panel when the liquid crystal deflection angle is less than or equal to a preset angle, and the preset angle is greater than 0; in response to the input of an initial common voltage value, acquiring display data and controlling the liquid crystal display panel to display a corresponding display screen to determine a target common voltage value according to the display screen; receiving the target common voltage value, and programming the target common voltage value into the driving chip.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and particularly to a programming method, a programming device, a programming system, and a display device. Background Art

[0002] A liquid crystal display depends on an externally provided display voltage to deflect liquid crystal molecules, thereby controlling the brightness of the liquid crystal display. To solve the problem of aging of liquid crystal molecules, a method of converting the positive and negative poles of the voltage is generally provided, but this conversion method will cause a flicker phenomenon in the display screen. As the size of the liquid crystal display panel gradually increases, the probability of screen flicker also increases.

[0003] In the related art, generally, the degree of screen flicker is reduced by adjusting the common voltage, that is, the optimal common voltage value of the liquid crystal display panel is determined, and then the optimal common voltage value is programmed into the driving chip. In this process, if the optimal common voltage value is determined inaccurately, screen flicker will still occur, affecting the display quality. Summary of the Invention

[0004] The present disclosure provides a programming method applied to a driving chip of a liquid crystal display panel. The programming method includes:

[0005] In response to the input of a power supply voltage signal, determining the historical programming times of the common voltage value in the driving chip;

[0006] If the historical programming times are less than or equal to a preset number of times, controlling the liquid crystal display panel to display a first preset screen; wherein, the first preset screen is a screen displayed by the liquid crystal display panel when the liquid crystal deflection angle is less than or equal to a preset angle, and the preset angle is greater than 0;

[0007] In response to the input of an initial common voltage value, acquiring display data and controlling the liquid crystal display panel to display a corresponding display screen, so as to determine a target common voltage value according to the display screen;

[0008] Receiving the target common voltage value, and programming the target common voltage value into the driving chip.

[0009] In an optional implementation manner, the step of receiving the target common voltage value and programming the target common voltage value into the driving chip includes:

[0010] In response to the input of a programming signal, controlling the liquid crystal display panel to display the first preset screen;

[0011] In a state where the liquid crystal display panel displays the first preset screen, receiving the target common voltage value, and programming the target common voltage value into the driving chip.

[0012] In an alternative implementation, the driving chip is further connected to a comparison circuit and an alarm circuit respectively. The comparison circuit is further connected to a first voltage output terminal and a second voltage output terminal respectively. The comparison circuit is configured to compare the real-time common voltage signal output from the first voltage output terminal and the reference common voltage signal output from the second voltage output terminal. The real-time common voltage signal is the voltage signal applied to the common electrode in the liquid crystal display panel in real time, and the reference common voltage signal is the voltage signal corresponding to the initial common voltage value.

[0013] After the step of obtaining display data and controlling the liquid crystal display panel to display a corresponding display screen, the method further includes:

[0014] If the display screen includes a second preset screen, obtain the comparison result output by the comparison circuit;

[0015] According to the comparison result, send a control signal to the alarm circuit so that the alarm circuit issues an alarm according to the control signal.

[0016] In an alternative implementation, the control signal includes a first control signal. The first control signal is used to control the alarm circuit to issue an alarm. The step of sending a control signal to the alarm circuit according to the comparison result includes:

[0017] If the comparison result indicates that the real-time common voltage signal is the same as the reference common voltage signal, send the first control signal to the alarm circuit so that the alarm circuit issues an alarm under the control of the first control signal.

[0018] In an alternative implementation, the second preset screen is a flashing screen, and the flashing value of the second preset screen corresponding to the target common voltage value is less than or equal to the flashing value of the second preset screen corresponding to the initial common voltage value.

[0019] In an alternative implementation, if the display mode of the liquid crystal display panel is the normally black mode, the first preset screen is a black screen; if the display mode of the liquid crystal display panel is the normally white mode, the first preset screen is a white screen.

[0020] In an alternative implementation, after the step of determining the historical programming times of the common voltage value in the driving chip, the method further includes:

[0021] If the historical programming times are greater than the preset times, obtain display data and control the liquid crystal display panel to display a corresponding display screen, so as to determine a target common voltage value according to the display screen; receive the target common voltage value, and program the target common voltage value into the driving chip.

[0022] The present disclosure provides a programming device, which is applied to a driving chip of a liquid crystal display panel. The programming device includes:

[0023] A determination module, configured to determine the historical programming times of the common voltage value in the driving chip in response to the input of a power supply voltage signal;

[0024] A first control module, configured to control the liquid crystal display panel to display a first preset screen if the historical programming times are less than or equal to the preset times; wherein, the first preset screen is a screen displayed by the liquid crystal display panel when the liquid crystal deflection angle is less than or equal to a preset angle, and the preset angle is greater than 0;

[0025] A second control module, configured to obtain display data and control the liquid crystal display panel to display a corresponding display screen in response to the input of an initial common voltage value, so as to determine a target common voltage value according to the display screen;

[0026] A programming module, configured to receive the target common voltage value and program the target common voltage value into the driving chip.

[0027] In an optional implementation manner, the programming module is specifically configured to:

[0028] Control the liquid crystal display panel to display the first preset screen in response to the input of a programming signal;

[0029] In a state where the liquid crystal display panel displays the first preset screen, receive the target common voltage value and program the target common voltage value into the driving chip.

[0030] In an optional implementation manner, the driving chip is further respectively connected to a comparison circuit and an alarm circuit. The comparison circuit is further respectively connected to a first voltage output terminal and a second voltage output terminal. The comparison circuit is used to compare a real-time common voltage signal output by the first voltage output terminal and a reference common voltage signal output by the second voltage output terminal. The real-time common voltage signal is a voltage signal applied to a common electrode in the liquid crystal display panel in real time, and the reference common voltage signal is a voltage signal corresponding to the initial common voltage value; the programming device further includes:

[0031] An obtaining module, configured to obtain a comparison result output by the comparison circuit if the display screen includes a second preset screen;

[0032] A sending module, configured to send a control signal to the alarm circuit according to the comparison result, so that the alarm circuit issues an alarm according to the control signal.

[0033] In an optional implementation manner, the comparison circuit includes:

[0034] A first analog-to-digital converter, whose input end is connected to the first voltage output end, and is used for performing analog-to-digital conversion on the real-time common voltage signal to obtain a first digital voltage signal;

[0035] A second analog-to-digital converter, whose input end is connected to the second voltage output end, and is used for performing analog-to-digital conversion on the reference common voltage signal to obtain a second digital voltage signal;

[0036] An exclusive-OR gate, whose two input ends are respectively connected to the output end of the first analog-to-digital converter and the output end of the second analog-to-digital converter, and the output end of the exclusive-OR gate is connected to the acquisition module, and is used for performing an exclusive-OR operation on the first digital voltage signal and the second digital voltage signal and outputting the comparison result.

[0037] In an optional implementation manner, the alarm circuit includes a switch circuit and an alarm;

[0038] Wherein, the switch circuit is respectively connected to the sending module, the third voltage output end and the alarm, and is used for controlling the conduction or cut-off between the third voltage output end and the alarm according to the control signal sent by the sending module;

[0039] The alarm is used for issuing an alarm when the third voltage output end and the alarm are conducted.

[0040] In an optional implementation manner, the switch circuit includes:

[0041] A triode, whose base is connected to the sending module, the emitter is connected to the third voltage output end, and the collector is connected to the alarm.

[0042] In an optional implementation manner, the switch circuit further includes:

[0043] A first resistor, arranged between the third voltage output end and the first node, and the first node is connected to the sending module;

[0044] A second resistor, arranged between the first node and the base;

[0045] A third resistor, arranged between the third voltage output end and the emitter;

[0046] A fourth resistor is disposed in parallel with the third resistor between the third voltage output terminal and the emitter;

[0047] A first capacitor, with its first end connected to the base and its second end connected to the ground potential.

[0048] In an alternative implementation, the alarm is a buzzer or a light-emitting diode.

[0049] In an alternative implementation, the control signal is a continuous signal or a pulse signal.

[0050] In an alternative implementation, the comparison circuit is disposed within the driving chip or on the driving circuit board of the liquid crystal display panel;

[0051] The alarm circuit is disposed on the driving circuit board.

[0052] The present disclosure provides a display device, including a liquid crystal display panel and a driving chip connected to the liquid crystal display panel, where the driving chip is configured to execute any one of the programming methods.

[0053] The present disclosure provides a programming system, including a liquid crystal display panel, a driving chip, a lighting platform, and a programmer;

[0054] Wherein, the lighting platform is connected to the driving chip and is configured to provide a power supply voltage signal and display data to the driving chip;

[0055] The programmer is connected to the driving chip and is configured to provide an initial common voltage value and a target common voltage value to the driving chip;

[0056] The driving chip is further connected to the liquid crystal display panel and is configured to, in response to the input of the power supply voltage signal, determine the historical programming times of the common voltage value in the driving chip; if the historical programming times are less than or equal to a preset number of times, control the liquid crystal display panel to display a first preset screen; wherein, the first preset screen is the screen displayed by the liquid crystal display panel when the liquid crystal deflection angle is less than or equal to a preset angle, and the preset angle is greater than 0; in response to the input of the initial common voltage value, receive the display data and control the liquid crystal display panel to display a corresponding display screen to determine the target common voltage value according to the display screen; receive the target common voltage value, and program the target common voltage value into the driving chip.

[0057] The above description is only an overview of the technical solutions of the present disclosure. In order to be able to understand the technical means of the present disclosure more clearly, it can be implemented according to the content of the description. And in order to make the above and other objects, features, and advantages of the present disclosure more obvious and understandable, the following specifically illustrates the specific embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. It should be noted that the sizes and shapes of the figures in the drawings do not reflect the true proportions, and the purpose is only to schematically illustrate the content of the present invention. The same or similar reference numerals in the drawings represent the same or similar elements or elements with the same or similar functions.

[0059] Figure 1 Schematically shows a schematic diagram of the formation mechanism of residual DC bias;

[0060] Figure 2 Schematically shows a schematic diagram of the connection structure of a programming system provided by the present disclosure;

[0061] Figure 3 Schematically shows a flowchart of the steps of a programming method provided by the present disclosure;

[0062] Figure 4 Schematically shows a timing diagram of several signals provided by the present disclosure in the first stage of programming;

[0063] Figure 5 Schematically shows a timing diagram of several signals provided by the present disclosure in the second stage of programming;

[0064] Figure 6 Schematically shows a flashing screen;

[0065] Figure 7 Schematically shows a schematic diagram of the structure of a comparison circuit provided by the present disclosure;

[0066] Figure 8 Schematically shows a schematic diagram of the structure of an alarm circuit provided by the present disclosure;

[0067] Figure 9 Schematically shows a schematic diagram of the structures of two display devices provided by the present disclosure;

[0068] Figure 10 Schematically shows a schematic diagram of two control signals provided by the present disclosure;

[0069] Figure 11 Schematically shows a flowchart of the steps of an implementation manner of a programming method provided by the present disclosure;

[0070] Figure 12The flowchart of a missing adjustment / missing burning detection program provided by the present disclosure is schematically shown;

[0071] Figure 13 The structural block diagram of a burning device provided by the present disclosure is schematically shown;

[0072] Figure 14 The structural block diagram of an implementation manner of a burning device provided by the present disclosure is schematically shown. Detailed implementation manners

[0073] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are some but not all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0074] Generally, a liquid crystal display screen needs to burn the optimal common voltage value into the register in the driving chip. The burning process is generally to directly power on the driving chip and write the initial common voltage value into the driving chip through a burner; then the driving chip receives the display data provided by the lighting device and displays the picture; afterwards, the common voltage value can be adjusted on the burner, and the common voltage value corresponding to the minimum flicker value of the display picture is used as the optimal common voltage value and burned into the driving chip.

[0075] In the above process, since the input of the initial common voltage value depends on the operation of the production line operator, the situation of missing input may occur in actual application. In this case, when the driving chip fails to detect the input of the initial common voltage, it will drive the display picture with the default common voltage value. However, the pre-stored default common voltage value generally deviates far from the optimal common voltage value. Under the drive of the default common voltage value, due to the asymmetry of the deflection of liquid crystal molecules under positive and negative driving voltages and the existence of ionic impurities in the liquid crystal alignment film, a residual DC bias will be formed, as Figure 1 shown. The existence of the DC bias causes the common voltage value adjusted to the minimum flicker value based on the default common voltage value not to be the true optimal common voltage value.

[0076] If the common voltage value adjusted based on the default common voltage value is burned into the driving chip and the power is turned off and then on again after the burning is completed, due to the different degrees of reduction of the residual DC bias of different pixels, the phenomenon of increased flicker will occur. In addition, even if the residual DC bias completely disappears, since the common voltage value burned into the driving chip is not the optimal common voltage value, the flicker of the display picture will be relatively serious, affecting the display effect.

[0077] It can be seen that the burning method in the related art is greatly affected by human factors, and it is very easy for the flicker value to drift during the burning process due to problems such as non-standard operations.

[0078] To solve the above problems, referring to Figure 2 FIG. schematically shows a structural diagram of a burning system provided by the present disclosure. As Figure 2 shown, the burning system includes a liquid crystal display panel 21, a driving chip 22, a burner 23, and a lighting stand 24. The burner 23 is connected to the driving chip 22, the lighting stand 24 is connected to the driving chip 22, and the driving chip 22 is further connected to the liquid crystal display panel 21.

[0079] An embodiment of the present disclosure provides a burning method, which is applied to the driving chip 22 of the liquid crystal display panel 21 as Figure 2 shown. Referring to Figure 3 FIG. schematically shows a flowchart of a burning method provided by the present disclosure. The burning method may include the following steps:

[0080] Step 301: In response to the input of a power supply voltage signal, determine the historical burning times of the common voltage value in the driving chip 22.

[0081] Among them, the power supply voltage signal may be provided by the lighting stand 24 as Figure 2 shown, and the present disclosure does not limit this.

[0082] In a specific implementation, there may be various ways to determine the historical burning times of the common voltage value in the driving chip 22. For example, in one implementation, when the driving chip 22 detects the input of a power supply voltage signal, it can read the historical common voltage values stored in the driving chip 22, and the number of changes of these historical common voltage values can be determined as the historical burning times of the common voltage value. In this implementation, it is necessary to save the common voltage value burned into the driving chip 22 each time as the historical common voltage value.

[0083] In another implementation, when the driving chip 22 detects the input of a power supply voltage signal, it can directly read the historical burning times pre-stored in the driving chip 22. In this implementation, it is necessary to store a parameter of the historical burning times in the driving chip 22, and each time a common voltage value is burned, the parameter value of this parameter needs to be updated, for example, incremented by 1.

[0084] Step 302: If the historical burning times are less than or equal to a preset number, control the liquid crystal display panel 21 to display a first preset screen; wherein, the first preset screen is the screen displayed by the liquid crystal display panel 21 when the liquid crystal deflection angle is less than or equal to a preset angle, and the preset angle is greater than 0.

[0085] Among them, the preset number of times can be determined according to actual needs, and the present disclosure does not limit this. The present disclosure takes the value of the preset number of times as 0 for illustrative purposes. For example, if the historical programming times obtained in step 301 is 0, the driving chip 22 controls the liquid crystal display panel 21 to display a first preset screen.

[0086] The first preset screen is the screen displayed by the liquid crystal display panel 21 when the liquid crystal deflection angle is less than or equal to a preset angle, that is, the screen displayed by the liquid crystal display panel 21 when the absolute value of the driving voltage for driving the liquid crystal deflection is less than a preset voltage.

[0087] The specific values of the first preset screen, the preset angle, and the preset voltage can all be set according to actual needs, and the present disclosure does not limit this. For example, the value of the preset angle can be 0°, 5°, etc.

[0088] Step 303: In response to the input of the initial common voltage value, obtain display data and control the liquid crystal display panel 21 to display a corresponding display screen, so as to determine the target common voltage value according to the display screen.

[0089] In a specific implementation, when the driving chip 22 detects the input of the initial common voltage value, it can obtain display data and control the liquid crystal display panel 21 to display a corresponding display screen. This display screen can be used to determine the target common voltage value.

[0090] Among them, the initial common voltage value can be determined through experiments during the development stage to ensure that the initial common voltage value is within a suitable range and does not deviate too far from the optimal common voltage value. The initial common voltage value can be provided by Figure 2 the programming device 23 as shown, and the present disclosure does not limit this.

[0091] In a specific implementation, the implementation manner of obtaining display data may include: receiving the display data sent by the lighting platform 24; or reading the display data provided by the lighting platform 24 and pre-stored in the driving chip 22, and the present disclosure does not limit this.

[0092] Exemplarily, referring to Figure 2 , the programming device 23 can first obtain the initial common voltage value entered by the operator, and then transmit this initial common voltage value to the driving chip 22; when the driving chip 22 detects that the input of the initial common voltage value is completed, it can obtain the display data provided by the lighting platform 24 and drive the liquid crystal display panel 21 to display a corresponding display screen; the operator can adjust the value of the common voltage in the direction of decreasing the flicker value according to the flicker degree of the display screen, so as to determine the target common voltage value.

[0093] Optionally, the flicker value of the display screen corresponding to the target common voltage value is less than or equal to the flicker value of the display screen corresponding to the initial common voltage value. Optionally, the target common voltage value can be the optimal common voltage value, that is, the flicker value of the display screen corresponding to the target common voltage value is the smallest.

[0094] Step 304: Receive the target common voltage value and burn the target common voltage value into the driving chip 22.

[0095] Exemplarily, the driving chip 22 can receive the target common voltage value provided by the burner 23, and then can burn the target common voltage value into the register in the driving chip 22.

[0096] Refer to Figure 4 , in response to the input of the power supply voltage signal VDD, that is, when the driving chip 22 detects that the power supply voltage signal VDD is at a high level, first determine the historical burn-in times of the common voltage value; when the historical burn-in times are less than or equal to the preset times, the source driver in the driving chip 22 forces the liquid crystal display panel 21 to output a first preset screen; when the driving chip 22 detects that the initial common voltage value is written completely, it can obtain the display data and control the liquid crystal display panel 21 to output a display screen.

[0097] Since the absolute value of the driving voltage required to display the first preset screen is small, even if the current common voltage value is not within the appropriate range, such as the current common voltage value is the default common voltage value far from the optimal common voltage value, by outputting the first preset screen with a small absolute value of the driving voltage, the generation of DC bias can be reduced, the residual DC bias can be lowered, and thus the flicker value drift phenomenon generated during the burn-in process of the display screen can be alleviated.

[0098] After detecting the input of the initial common voltage value, the driving chip 22 then drives the liquid crystal display panel 21 to perform normal display, that is, obtains the display data and controls the liquid crystal display panel 21 to display the corresponding display screen. By reasonably setting the initial common voltage value so that the initial common voltage value is close to the optimal common voltage value, on the one hand, the generation of DC bias can be reduced, the residual DC bias can be lowered, and the flicker value drift phenomenon generated during the burn-in process of the display screen can be improved; on the other hand, based on the initial common voltage value, the common voltage value with the smallest flicker value, that is, the optimal common voltage value, can be obtained by adjustment, and then this optimal common voltage value can be burned into the driving chip 22 as the target common voltage value, which can effectively reduce the flicker of the normal display screen and improve the picture quality of the liquid crystal display panel.

[0099] In an optional implementation manner, after step 301, the following steps may further be included:

[0100] Step 305: If the historical programming times are greater than the preset times, obtain display data and control the liquid crystal display panel 21 to display a corresponding display screen, so as to determine a target common voltage value according to the display screen; receive the target common voltage value, and program the target common voltage value into the driving chip 22.

[0101] In a specific implementation, when the driving chip 22 detects that the historical programming times are greater than the preset times, such as 0 times, display data can be obtained and the liquid crystal display panel 21 can be controlled to display a corresponding display screen. The display screen can be used to determine the target common voltage value.

[0102] In a specific implementation, the implementation manner of obtaining display data may include: receiving the display data sent by the lighting console 24; or reading the display data provided by the lighting console 24 and pre-stored in the driving chip 22. The present disclosure does not limit this.

[0103] Exemplarily, referring to Figure 2 , when the driving chip 22 detects that the historical programming times are greater than the preset times, display data provided by the lighting console 24 can be obtained and the liquid crystal display panel 21 can be driven to display a corresponding display screen; the operator can adjust the value of the common voltage in the direction of decreasing the flicker value according to the flicker degree of the display screen, so as to determine the target common voltage value.

[0104] Optionally, the flicker value of the display screen corresponding to the target common voltage value is less than or equal to the flicker value of the display screen corresponding to the initial common voltage value. Optionally, the target common voltage value can be the optimal common voltage value, that is, the flicker value of the display screen corresponding to the target common voltage value is the smallest.

[0105] In an optional implementation manner, the value of the preset angle is 0°. Correspondingly, the first preset screen is the screen displayed by the liquid crystal display panel 21 when the liquid crystal deflection angle is 0°. In this case, the absolute value of the driving voltage for driving the liquid crystal deflection is the smallest.

[0106] Specifically, if the display mode of the liquid crystal display panel 21 is the normally black mode, the first preset screen is a black screen. In this case, the black screen is the screen displayed by the normally black mode liquid crystal display panel 21 in the state of no liquid crystal deflection, that is, the screen displayed by the normally black mode liquid crystal display panel 21 when the liquid crystal deflection angle is 0°.

[0107] If the display mode of the liquid crystal display panel 21 is the normally white mode, the first preset screen is a white screen. In this case, the white screen is the screen displayed by the normally white mode liquid crystal display panel 21 in the state of no liquid crystal deflection, that is, the screen displayed by the normally white mode liquid crystal display panel 21 when the liquid crystal deflection angle is 0°.

[0108] In this implementation, since the absolute value of the driving voltage for driving the liquid crystal deflection is the smallest, the generation of DC bias can be minimized to the greatest extent, and the residual DC bias can be reduced to the lowest level. As a result, the phenomenon of flicker value drift generated during the burning process of the display screen can be more significantly alleviated.

[0109] In an alternative implementation, step 304 may specifically include: in response to the input of the burning signal, controlling the liquid crystal display panel 21 to display a first preset screen; in the state where the liquid crystal display panel 21 displays the first preset screen, receiving the target common voltage value and burning the target common voltage value into the driving chip 22.

[0110] Refer to Figure 5 , after entering the burning process, that is, when the driving chip 22 detects that the burning signal VDD_OTP is at a high level, the Source Driver in the driving chip 22 forces the liquid crystal display panel to output a first preset screen until the burning is completed. Before entering the burning process or after the burning is completed, the source driver can obtain the display data provided by the lighting platform 24, etc. and drive the liquid crystal display panel 21 to display the corresponding display screen.

[0111] In a specific implementation, the burning process can be triggered by an operator on the burner 23, and the burning signal VDD_OTP can be sent from the burner 23 to the driving chip 22.

[0112] In a one-time programming (OTP) process, when Disable OTP password is detected, it indicates that the burning data (including the target common voltage value) has been received and the burning is completed.

[0113] In this implementation, since the absolute value of the driving voltage required to display the first preset screen is small, by outputting the first preset screen with a small absolute value of the driving voltage during the burning process, the DC bias caused by the target common voltage value not being within the appropriate range can be reduced, and the DC bias caused by improper operations (such as the operator forgetting to adjust the common voltage value) can be avoided, and the residual DC bias can be reduced. As a result, the phenomenon of flicker value drift generated during the burning process of the display screen can be alleviated, and the picture quality of the liquid crystal display panel can be improved.

[0114] In the related art, after the liquid crystal display panel outputs the display screen, generally, an operator manually adjusts the value of the common voltage on the burner, and then burns the adjusted common voltage value, that is, the target common voltage value, into the driving chip through the communication interface. Since this method of adjusting the common voltage is manual adjustment, there is a certain probability of missed adjustment, which may lead to quality problems such as flicker and afterimage in the liquid crystal display panel after the burning is completed.

[0115] To solve the above problems, in an alternative implementation, as Figure 2 or Figure 7 shown, the driving chip 22 can also be respectively connected to the comparison circuit 25 and the alarm circuit 26, and the comparison circuit 25 is also respectively connected to the first voltage output terminal Vcom and the second voltage output terminal Vref.

[0116] Among them, the comparison circuit 25 is used to compare the magnitudes of the real-time common voltage signal output by the first voltage output terminal Vcom and the reference common voltage signal output by the second voltage output terminal Vref.

[0117] The first voltage output terminal Vcom and the second voltage output terminal Vref can be two output terminals of the power control chip.

[0118] The real-time common voltage signal is the voltage signal applied to the common electrode in the liquid crystal display panel 21 in real time, that is, the voltage signal output by the power control chip in real time. The reference common voltage signal is the voltage signal corresponding to the initial common voltage value.

[0119] In an alternative implementation, after the step of obtaining display data and controlling the liquid crystal display panel 21 to display the corresponding display screen in step 303 or step 305, it may further include:

[0120] If the display screen includes a second preset screen, execute the under-adjustment / under-burning detection program. Among them, the under-adjustment / under-burning detection program may specifically include: obtaining the comparison result Q output by the comparison circuit 25; according to the comparison result Q, sending a control signal to the alarm circuit 26 so that the alarm circuit 26 issues an alarm according to the control signal.

[0121] Among them, the control signal may include a first control signal, and the first control signal is used to control the alarm circuit 26 to issue an alarm. Correspondingly, the step of sending a control signal to the alarm circuit 26 according to the comparison result may include: if the comparison result indicates that the real-time common voltage signal is the same as the reference common voltage signal, send a first control signal to the alarm circuit 26 so that the alarm circuit 26 issues an alarm under the control of the first control signal.

[0122] Among them, the second preset screen may be a flashing screen, that is, the screen with the most severe flashing. As Figure 6 shown, the flashing screen is the 1+2Dot Green 255 screen.

[0123] Optionally, the flashing value of the second preset screen corresponding to the target common voltage value may be less than or equal to the flashing value of the second preset screen corresponding to the initial common voltage value.

[0124] Optionally, the target common voltage value can be the optimal common voltage value, that is, the flicker value of the second preset screen corresponding to the target common voltage value is the smallest.

[0125] When the display screen includes a flickering screen, it can be considered that the current liquid crystal display panel is in the process of an operator adjusting the common voltage value.

[0126] The driving chip 22 parses the display data and then outputs it to the liquid crystal display panel. Therefore, the screen displayed on the liquid crystal panel is determined by the data output by the driving chip 22.

[0127] In a specific implementation, the driving chip can detect the data output to the liquid crystal display panel to determine whether the display screen includes a second preset screen. When the driving chip 22 detects that the display screen on the liquid crystal display panel 21 includes a second preset screen such as a flickering screen, it can trigger a missing adjustment / missing burn detection program; or when the driving chip 22 detects that the display screen on the liquid crystal display panel 21 is 100% matched with a second preset screen such as a flickering screen 100%, it can trigger a missing adjustment / missing burn detection program.

[0128] In this implementation manner, when the display screen includes a second preset screen, the comparison circuit compares the real-time common voltage signal and the reference common voltage signal in terms of magnitude. The driving chip can automatically identify whether the common voltage value has been adjusted according to the comparison result, and send a control signal to the warning circuit according to the identification result.

[0129] When the comparison result indicates that the real-time common voltage signal and the reference common voltage signal are the same, it means that the real-time common voltage value is still the initial common voltage value, that is, the operator has not adjusted the common voltage value based on the initial common voltage value. At this time, the driving chip can send a first control signal to the warning circuit, and the warning circuit issues a warning under the control of the first control signal to prompt the operator to adjust the common voltage value of the liquid crystal display panel after receiving the warning, thereby effectively reducing the probability of missing adjustment or missing burn of the common voltage value on the production line and improving the panel yield and quality.

[0130] Optionally, as Figure 7 shown, the comparison circuit 25 may include:

[0131] A first analog-to-digital converter 71, whose input terminal is connected to the first voltage output terminal Vcom, is used to perform analog-to-digital conversion on the real-time common voltage signal to obtain a first digital voltage signal Va.

[0132] A second analog-to-digital converter 72, whose input terminal is connected to the second voltage output terminal Vref, is used to perform analog-to-digital conversion on the reference common voltage signal to obtain a second digital voltage signal Vb.

[0133] The exclusive-OR gate 73 has two input terminals respectively connected to the output terminal of the first analog-to-digital converter 71 and the output terminal of the second analog-to-digital converter 72, and an output terminal connected to the driving chip 22, and is used for performing an exclusive-OR operation on the first digital voltage signal Va and the second digital voltage signal Va, and outputting a comparison result Q.

[0134] As Figure 7 shown, the real-time common voltage signal and the reference common voltage signal are simultaneously input to the comparison circuit 25. Among them, the analog real-time common voltage signal is subjected to analog-to-digital conversion by the first analog-to-digital converter 71 to obtain the first digital voltage signal Va; the analog reference common voltage signal is subjected to analog-to-digital conversion by the second analog-to-digital converter 72 to obtain the second digital voltage signal Vb.

[0135] After the conversion is completed, the first digital voltage signal Va and the second digital voltage signal Vb are input to the exclusive-OR gate 73. If the first digital voltage signal Va and the second digital voltage signal Vb are the same, the output comparison result Q = 0; if the first digital voltage signal Va and the second digital voltage signal Vb are different, the output comparison result Q = 1.

[0136] The comparison circuit 25 inputs the output result Q as an enable signal to the driving chip 22, and after receiving the enable signal, the driving chip 22 outputs a control signal to the alarm circuit 26.

[0137] Optionally, as Figure 8 shown, the alarm circuit 26 includes a switch circuit 81 and an alarm 82.

[0138] Among them, the switch circuit 81 is respectively connected to the driving chip 22, the third voltage output terminal VCC, and the alarm 82, and is used for controlling the conduction or cut-off between the third voltage output terminal VCC and the alarm 82 according to the control signal sent by the driving chip 22.

[0139] The alarm 82 is used for giving an alarm when the third voltage output terminal VCC and the alarm 82 are conducting.

[0140] As Figure 8 shown, the switch circuit 81 may include: a triode Q1, the base of the triode Q1 is connected to the driving chip 22, the emitter is connected to the third voltage output terminal VCC, and the collector is connected to the alarm 82.

[0141] As Figure 8 shown, the switch circuit 81 may further include: a first resistor R1, arranged between the third voltage output terminal VCC and the first node A, and the first node A is connected to the driving chip 22. The first circuit R1 is a pull-up resistor for the third voltage output terminal VCC.

[0142] As Figure 8As shown, the switch circuit 81 may further include: a second resistor R2, disposed between the first node A and the base of the triode Q1. The second resistor R2 is a current-limiting resistor for the triode Q1 to prevent the triode Q1 from being burned out due to excessive current.

[0143] As Figure 8 shown, the switch circuit 81 may further include: a third resistor R3, disposed between the third voltage output terminal VCC and the emitter of the triode Q1; and a fourth resistor R4, disposed in parallel with the third resistor R3 between the third voltage output terminal VCC and the emitter of the triode Q1. The third resistor R3 and the fourth resistor R4 in parallel are shunt resistors, which can be used to adjust the volume of the alarm 82 such as the buzzer LS1.

[0144] As Figure 8 shown, the switch circuit 81 may further include: a first capacitor C1, with the first end connected to the base of the triode Q1 and the second end connected to the ground potential GND. The first capacitor C1 is a bypass capacitor for filtering.

[0145] Optionally, the alarm 82 may be a buzzer LS1 (as Figure 8 shown) or a light-emitting diode. As Figure 8 shown, one end of the buzzer LS1 is connected to the collector of the triode Q1, and the other end is connected to the ground potential GND.

[0146] Optionally, the comparison circuit 25 may be disposed inside the driving chip 22 (as Figure 9 shown in a of the figure). In this case, the driving chip 22 can control and implement the function of comparing the real-time common voltage signal and the reference common voltage signal through software registers, and output a hardware control signal to the alarm circuit 26 according to the comparison result.

[0147] Optionally, the comparison circuit 25 may also be disposed on the driving circuit board 27 of the liquid crystal display panel 21 (as Figure 9 shown in b of the figure).

[0148] Optionally, referring to Figure 9 shown in a and b of the figure, the alarm circuit 26 may be disposed on the driving circuit board 27.

[0149] Among them, the driving circuit board 27 is connected to the driving chip 22. The driving circuit board 27 may be a PCB board or an FPCA board.

[0150] For convenience of description, hereinafter, the value of the reference common voltage signal is represented by Vref. The value of the real-time common voltage signal is represented by Vcom.

[0151] Referring to Figure 7 and Figure 8When the production line operator does not adjust the value of the common voltage signal, Vref = Vcom. Correspondingly, the first digital voltage signal Va and the second digital voltage signal Vb are the same, and the output comparison result Q = 0. In this case, the driving chip 22 can be set to output a low-level control signal to the warning circuit 26, the triode Q1 conducts, and the buzzer LS1 emits a sound to warn the production line operator.

[0152] After the production line operator adjusts the value of the common voltage signal, Vref ≠ Vcom. Correspondingly, the first digital voltage signal Va and the second digital voltage signal Vb are different, and the output comparison result Q = 1. In this case, the driving chip 22 can be set to output a high-level control signal to the warning circuit 26, the triode Q1 is cut off, no current passes through the buzzer LS1, and the buzzer LS1 does not make a sound.

[0153] Refer to Figure 10 As shown in a of

[0154] Refer to Figure 10 As shown in b of

[0155] The control signal can be a continuous signal. For example, the continuous signal can be a continuously output low-level signal.

[0156] Refer to Figure 11 Schematically, the flowchart of the steps of a specific implementation manner of a programming method provided by the present disclosure. The programming method is applied to a normally black mode liquid crystal display panel, and the execution subject is the driving chip of the liquid crystal display panel. The programming method may include:

[0157] Step 1101: After power-on, determine the historical programming times of the common voltage value in the driving chip;

[0158] Step 1102: If the historical programming times is 0, force the liquid crystal display panel to output a black screen until it is detected that the initial common voltage value is written into the driving chip, and then execute step 1103; if the historical programming times is not 0, directly execute step 1103;

[0159] Step 1103: Obtain display data and control the liquid crystal display panel to output a display screen;

[0160] Step 1104: If the display screen includes a flashing screen, execute the missing adjustment / missing burn detection program;

[0161] Step 1105: In response to the writing of the programming signal, force the liquid crystal display panel to display a black screen, while receiving the target common voltage value and programming the target common voltage value into the driver chip.

[0162] Refer to Figure 12 Schematically, a flowchart of steps of a missing adjustment / missing burn detection program provided by the present disclosure, the execution subject of the missing adjustment / missing burn detection program being the driver chip of the liquid crystal display panel. The missing adjustment / missing burn detection program may include:

[0163] Step 1201: The driver chip detects the display screen;

[0164] Step 1202: Determine whether the display screen is a flashing screen; if so, execute Step 1203; if not, repeat Step 1202;

[0165] Step 1203: Determine whether Vref = Vcom holds; if so, execute Step 1204; if not, end the missing adjustment / missing burn detection program;

[0166] Step 1204: The driver chip issues a first control signal;

[0167] Step 1205: The buzzer emits a beeping sound, and Steps 1202 to 1205 are repeated.

[0168] An embodiment of the present disclosure provides a programming device applied to the driver chip 22 of the liquid crystal display panel 21 as shown in Figure 2 Refer to Figure 13 Schematically, a structural block diagram of a programming device provided by the present disclosure, the programming device may include:

[0169] A determination module 1301, configured to determine the historical programming times of the common voltage value in the driver chip 22 in response to the input of the power supply voltage signal;

[0170] A first control module 1302, configured to control the liquid crystal display panel 21 to display a first preset screen if the historical programming times are less than or equal to a preset number of times; wherein, the first preset screen is the screen displayed by the liquid crystal display panel 21 when the liquid crystal deflection angle is less than or equal to a preset angle, and the preset angle is greater than 0;

[0171] A second control module 1303, configured to obtain display data and control the liquid crystal display panel 21 to display a corresponding display screen in response to the input of the initial common voltage value, so as to determine the target common voltage value according to the display screen;

[0172] The programming module 1304 is configured to receive a target common voltage value and program the target common voltage value into the driving chip 22.

[0173] In an alternative implementation, the programming module 1304 is specifically configured to:

[0174] In response to the input of a programming signal, control the liquid crystal display panel 21 to display a first preset screen;

[0175] In a state where the liquid crystal display panel 21 displays the first preset screen, receive the target common voltage value and program the target common voltage value into the driving chip 22.

[0176] In an alternative implementation, referring to Figure 2 or Figure 7 , the driving chip 22 is further respectively connected to a comparison circuit 25 and an alarm circuit 26. The comparison circuit 25 is further respectively connected to a first voltage output terminal Vcom and a second voltage output terminal Vref. The comparison circuit 25 is configured to compare a real-time common voltage signal output from the first voltage output terminal Vcom and a reference common voltage signal output from the second voltage output terminal Vref. The real-time common voltage signal is a voltage signal applied in real time to the common electrode in the liquid crystal display panel 21, and the reference common voltage signal is a voltage signal corresponding to the initial common voltage value.

[0177] In this implementation, referring to Figure 14 , the programming device may further include:

[0178] An acquisition module 1401, configured to acquire a comparison result output by the comparison circuit 25 if the display screen includes a second preset screen;

[0179] A sending module 1402, configured to send a control signal to the alarm circuit 26 according to the comparison result, so that the alarm circuit 26 issues an alarm according to the control signal.

[0180] In an alternative implementation, referring to Figure 7 , the comparison circuit 25 includes:

[0181] A first analog-to-digital converter 71, with an input end connected to the first voltage output terminal Vcom, configured to perform analog-to-digital conversion on the real-time common voltage signal to obtain a first digital voltage signal;

[0182] A second analog-to-digital converter 72, with an input end connected to the second voltage output terminal Vref, configured to perform analog-to-digital conversion on the reference common voltage signal to obtain a second digital voltage signal;

[0183] The exclusive-OR gate 73 has two input terminals respectively connected to the output terminal of the first analog-to-digital converter 71 and the output terminal of the second analog-to-digital converter 72, and the output terminal is connected to the acquisition module 1401, and is used to perform an exclusive-OR operation on the first digital voltage signal and the second digital voltage signal and output a comparison result.

[0184] In an optional implementation manner, referring to Figure 8 , the alarm circuit 26 includes a switch circuit 81 and an alarm 82;

[0185] Among them, the switch circuit 81 is respectively connected to the sending module 1402, the third voltage output terminal VCC and the alarm 82, and is used to control the conduction or cut-off between the third voltage output terminal VCC and the alarm 82 according to the control signal sent by the sending module 1402;

[0186] The alarm 82 is used to give an alarm when the third voltage output terminal VCC and the alarm 82 are conducting.

[0187] In an optional implementation manner, referring to Figure 7 , the switch circuit 81 includes:

[0188] A triode Q1, with the base connected to the sending module 1402, the emitter connected to the third voltage output terminal VCC, and the collector connected to the alarm 82.

[0189] In an optional implementation manner, the switch circuit 81 further includes:

[0190] A first resistor R1, arranged between the third voltage output terminal VCC and the first node A, and the first node A is connected to the sending module 1402;

[0191] A second resistor R2, arranged between the first node A and the base;

[0192] A third resistor R3, arranged between the third voltage output terminal VCC and the emitter;

[0193] A fourth resistor R4, arranged in parallel with the third resistor R3 between the third voltage output terminal VCC and the emitter;

[0194] A first capacitor C1, with the first end connected to the base and the second end connected to the ground potential GND.

[0195] In an optional implementation manner, the alarm 82 is a buzzer LS1 (as shown in Figure 8 ) or a light-emitting diode.

[0196] In an optional implementation manner, the control signal is a continuous signal or a pulse signal.

[0197] In an optional implementation manner, referring to Figure 9, the comparison circuit 25 is provided inside the driving chip 22 or on the driving circuit board 27 of the liquid crystal display panel 21; the warning circuit 26 is provided on the driving circuit board 27; wherein, the driving circuit board 27 is connected to the driving chip 22.

[0198] For the embodiment of the programming device, since it is basically similar to the embodiment of the programming method, the description is relatively simple, and for the related parts, please refer to the partial description of the embodiment of the programming method.

[0199] The present disclosure provides a display device. Refer to Figure 9 , the display device includes a liquid crystal display panel 21 and a driving chip 22 connected to the liquid crystal display panel 21, and the driving chip 22 is used to execute the programming method provided by any of the embodiments.

[0200] Since the driving chip 22 in the display device 28 is programmed by using the above-mentioned programming method, those skilled in the art can understand that the display device 28 has the advantages of the programming method provided by the present disclosure. The flicker value of the picture displayed by the display device 28 is relatively low, and the picture quality is relatively high.

[0201] Furthermore, as Figure 9 shown, the display device 28 may further include a driving circuit board 27, a comparison circuit 25, a warning circuit 26, etc. connected to the driving chip 22.

[0202] For the embodiment of the display device, its structure and function are basically similar to those of the embodiment of the programming method, so the description is relatively simple, and for the related parts, please refer to the partial description of the embodiment of the programming method.

[0203] It should be noted that the display device in this embodiment may be: an electronic paper, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator, or any product or component having 2D or 3D display functions.

[0204] The present disclosure provides a programming system. Refer to Figure 2 , including a liquid crystal display panel 21, a driving chip 22, a lighting platform 24, and a programmer 23.

[0205] Wherein, the lighting platform 24 is connected to the driving chip 22 and is configured to provide a power supply voltage signal and display data to the driving chip 22.

[0206] The programmer 23 is connected to the driving chip 22 and is configured to provide an initial common voltage value and a target common voltage value to the driving chip 22.

[0207] The driving chip 22 is also connected to the liquid crystal display panel 21 and is configured to determine the historical programming times of the common voltage value in the driving chip 22 in response to the input of a power supply voltage signal; if the historical programming times is less than or equal to a preset number of times, control the liquid crystal display panel 21 to display a first preset screen; wherein, the first preset screen is the screen displayed by the liquid crystal display panel 21 when the liquid crystal deflection angle is less than or equal to a preset angle, and the preset angle is greater than 0; in response to the input of an initial common voltage value, receive display data and control the liquid crystal display panel 21 to display a corresponding display screen, so as to determine a target common voltage value according to the display screen; receive the target common voltage value, and program the target common voltage value into the driving chip 22.

[0208] Those skilled in the art can understand that this programming system has the advantages of the programming method provided by the present disclosure.

[0209] Further, as Figure 2 shown, this programming system may further include a driving circuit board 27, a comparison circuit 25, an alarm circuit 26, etc. connected to the driving chip 22.

[0210] The driving chip 22, the liquid crystal display panel 21, the driving circuit board 27, the comparison circuit 25, and the alarm circuit 26 may be arranged in the display device 28, and the present disclosure does not limit this.

[0211] In a specific implementation, the driving chip 22 may be used to implement the steps in the embodiments of the programming method.

[0212] For the embodiments of the programming system, since they are basically similar to the embodiments of the programming method, the description is relatively simple, and for the related parts, reference may be made to the partial description of the embodiments of the programming method.

[0213] Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and for the same or similar parts among the embodiments, reference may be made to each other.

[0214] Finally, it should also be noted that, unless otherwise defined, the terms "first", "second" and similar words used in this article do not denote any order, quantity or importance, but are only used to distinguish different components. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, commodity or device comprising said element. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0215] The above has provided a detailed introduction to a programming method, a programming device, a programming system and a display device provided by the present disclosure. Specific examples are used in this article to elaborate on the principles and implementation manners of the present disclosure. The description of the above embodiments is only used to help understand the method and its core idea of the present disclosure; at the same time, for those of ordinary skill in the art, according to the idea of the present disclosure, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present disclosure.

[0216] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common general knowledge or conventional technical means in the technical field not disclosed by the present disclosure. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0217] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

[0218] As used herein, the terms "an embodiment", "embodiment" or "one or more embodiments" mean that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. In addition, please note that the examples of the phrase "in one embodiment" herein do not necessarily all refer to the same embodiment.

[0219] In the description provided herein, numerous specific details are set forth. However, it can be understood that embodiments of the present disclosure may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this description.

[0220] In a claim, any reference sign between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present disclosure may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim enumerating several devices, several of these devices may be embodied by the same item of hardware. The use of the words first, second, and third, etc. does not denote any order. These words may be interpreted as names.

[0221] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and are not intended to limit them. Although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A programming method, applied to a driving chip of a liquid crystal display panel, the programming method comprising: Responding to the input of a power supply voltage signal, determining the historical programming times of the common voltage value in the driving chip; If the historical programming times are less than or equal to a preset number of times, controlling the liquid crystal display panel to display a first preset screen; wherein, the first preset screen is the screen displayed by the liquid crystal display panel when the liquid crystal deflection angle is less than or equal to a preset angle, and the preset angle is greater than 0; Responding to the input of an initial common voltage value, acquiring display data and controlling the liquid crystal display panel to display a corresponding display screen, so as to determine a target common voltage value according to the display screen; If the historical programming times are greater than the preset number of times, acquiring display data and controlling the liquid crystal display panel to display a corresponding display screen, so as to determine a target common voltage value according to the display screen; Receiving the target common voltage value and programming the target common voltage value into the driving chip.

2. The programming method according to claim 1, wherein, The step of receiving the target common voltage value and programming the target common voltage value into the driving chip includes: Responding to the input of a programming signal, controlling the liquid crystal display panel to display the first preset screen; In the state where the liquid crystal display panel displays the first preset screen, receiving the target common voltage value and programming the target common voltage value into the driving chip.

3. The programming method according to claim 1, wherein The driving chip is further respectively connected to a comparison circuit and an alarm circuit, the comparison circuit is further respectively connected to a first voltage output terminal and a second voltage output terminal, the comparison circuit is used for comparing the real-time common voltage signal output by the first voltage output terminal and the reference common voltage signal output by the second voltage output terminal, the real-time common voltage signal is the voltage signal applied to the common electrode in the liquid crystal display panel in real time, and the reference common voltage signal is the voltage signal corresponding to the initial common voltage value; After the step of acquiring display data and controlling the liquid crystal display panel to display a corresponding display screen, it further includes: If the display screen includes a second preset screen, acquiring the comparison result output by the comparison circuit; According to the comparison result, sending a control signal to the alarm circuit, so that the alarm circuit issues an alarm according to the control signal.

4. The programming method according to claim 3, wherein, The control signal includes a first control signal, the first control signal is used for controlling the alarm circuit to issue an alarm, and the step of sending a control signal to the alarm circuit according to the comparison result includes: If the comparison result indicates that the real-time common voltage signal is the same as the reference common voltage signal, sending the first control signal to the alarm circuit, so that the alarm circuit issues an alarm under the control of the first control signal.

5. The programming method according to claim 3, wherein, The second preset screen is a flashing screen, and the flashing value of the second preset screen corresponding to the target common voltage value is less than or equal to the flashing value of the second preset screen corresponding to the initial common voltage value.

6. The programming method according to any one of claims 1 to 5, wherein, If the display mode of the liquid crystal display panel is the normally black mode, the first preset picture is a black picture; if the display mode of the liquid crystal display panel is the normally white mode, the first preset picture is a white picture.

7. A programming device applied to a driving chip of a liquid crystal display panel, the programming device comprising: a determining module configured to determine a historical programming count of a common voltage value in the driving chip in response to an input of a power supply voltage signal; a first control module configured to control the liquid crystal display panel to display a first preset picture if the historical programming count is less than or equal to a preset count; wherein the first preset picture is a picture displayed by the liquid crystal display panel when a liquid crystal deflection angle is less than or equal to a preset angle, and the preset angle is greater than 0; a second control module configured to obtain display data and control the liquid crystal display panel to display a corresponding display picture in response to an input of an initial common voltage value, so as to determine a target common voltage value according to the display picture; a programming module configured to receive the target common voltage value and program the target common voltage value into the driving chip; The device is further configured to: if the historical programming count is greater than the preset count, obtain display data and control the liquid crystal display panel to display a corresponding display picture, so as to determine a target common voltage value according to the display picture.

8. The programming device according to claim 7, wherein, The programming module is specifically configured to: control the liquid crystal display panel to display the first preset picture in response to an input of a programming signal; in a state where the liquid crystal display panel displays the first preset picture, receive the target common voltage value and program the target common voltage value into the driving chip.

9. The programming device according to claim 7, wherein, The driving chip is further connected to a comparison circuit and an alarm circuit respectively, the comparison circuit is further connected to a first voltage output terminal and a second voltage output terminal respectively, the comparison circuit is configured to compare a real-time common voltage signal output by the first voltage output terminal and a reference common voltage signal output by the second voltage output terminal, the real-time common voltage signal is a voltage signal applied to a common electrode in the liquid crystal display panel in real time, and the reference common voltage signal is a voltage signal corresponding to the initial common voltage value; The programming device further comprises: an obtaining module configured to obtain a comparison result output by the comparison circuit if the display picture includes a second preset picture; a sending module configured to send a control signal to the alarm circuit according to the comparison result, so that the alarm circuit issues an alarm according to the control signal.

10. The programming device according to claim 9, wherein, The comparison circuit comprises: a first analog-to-digital converter, an input end of which is connected to the first voltage output terminal, and is configured to perform analog-to-digital conversion on the real-time common voltage signal to obtain a first digital voltage signal; a second analog-to-digital converter, an input end of which is connected to the second voltage output terminal, and is configured to perform analog-to-digital conversion on the reference common voltage signal to obtain a second digital voltage signal; An exclusive-OR gate, with two input terminals respectively connected to the output terminal of the first analog-to-digital converter and the output terminal of the second analog-to-digital converter. The output terminal of the exclusive-OR gate is connected to the acquisition module, and is used to perform an exclusive-OR operation on the first digital voltage signal and the second digital voltage signal, and output the comparison result.

11. The programming device according to claim 9, wherein, The alarm circuit includes a switch circuit and an alarm device; Wherein, the switch circuit is respectively connected to the sending module, the third voltage output terminal and the alarm device, and is used to control the conduction or cut-off between the third voltage output terminal and the alarm device according to the control signal sent by the sending module; The alarm device is used to give an alarm when the third voltage output terminal and the alarm device are conducted.

12. The programming device according to claim 11, wherein, The switch circuit includes: A triode, with the base connected to the sending module, the emitter connected to the third voltage output terminal, and the collector connected to the alarm device.

13. The programming device according to claim 12, wherein, The switch circuit further includes: A first resistor, arranged between the third voltage output terminal and the first node, and the first node is connected to the sending module; A second resistor, arranged between the first node and the base; A third resistor, arranged between the third voltage output terminal and the emitter; A fourth resistor, arranged in parallel with the third resistor between the third voltage output terminal and the emitter; A first capacitor, with the first end connected to the base and the second end connected to the ground potential.

14. The programming device according to claim 11, wherein, The alarm device is a buzzer or a light-emitting diode.

15. The programming device according to claim 9, wherein, The control signal is a continuous signal or a pulse signal.

16. The programming device according to any one of claims 9 to 15, wherein, The comparison circuit is arranged inside the driving chip or on the driving circuit board of the liquid crystal display panel; The alarm circuit is arranged on the driving circuit board.

17. A display device, including a liquid crystal display panel and a driving chip connected to the liquid crystal display panel, and the driving chip is used to execute the programming method according to any one of claims 1 to 6.

18. A programming system, including a liquid crystal display panel, a driving chip, a lighting platform and a programmer; Among them, The lighting platform is connected to the driving chip and is configured to provide a power supply voltage signal and display data to the driving chip; The programmer is connected to the driving chip and is configured to provide an initial common voltage value and a target common voltage value to the driving chip; The driving chip is also connected to the liquid crystal display panel and is configured to determine the historical programming times of the common voltage value in the driving chip in response to the input of the power supply voltage signal; if the historical programming times is less than or equal to a preset number of times, control the liquid crystal display panel to display a first preset screen; wherein, the first preset screen is the screen displayed by the liquid crystal display panel when the liquid crystal deflection angle is less than or equal to a preset angle, and the preset angle is greater than 0; in response to the input of the initial common voltage value, receive the display data and control the liquid crystal display panel to display the corresponding display screen to determine the target common voltage value according to the display screen; if the historical programming times is greater than the preset number of times, obtain the display data and control the liquid crystal display panel to display the corresponding display screen to determine the target common voltage value; receive the target common voltage value, and program the target common voltage value into the driving chip.

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