Driving method, device, storage medium and electronic equipment of liquid crystal display panel

Abstract

The present disclosure provides a driving method and device of a liquid crystal display panel, a storage medium and an electronic device. The method comprises: obtaining a first refresh rate corresponding to a current frame of the liquid crystal display panel; detecting whether the first refresh rate is the same as a second refresh rate corresponding to a previous frame; in the case that the first refresh rate is different from the second refresh rate, determining a first driving voltage according to the first refresh rate; and driving the liquid crystal display panel by using the first driving voltage. The present disclosure obtains the real-time refresh rate of the liquid crystal display panel, determines a new first driving voltage by using the first refresh rate of the current frame when the refresh rate changes, and drives the liquid crystal display panel by using the first driving voltage, so that the liquid crystal display panel is driven by the driving voltage which is constantly changing, thereby balancing the service life and charging efficiency, and achieving the best display effect and use experience.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a driving method, apparatus, storage medium, and electronic device for a liquid crystal display panel. Background Technology

[0002] Liquid crystal displays (LCDs) control the liquid crystal layer at specific locations by switching individual thin-film transistors (TFTs) on and off, thus allowing the liquid crystals to flip and display the corresponding pixels. As users' demands for viewing experiences on electronic devices continue to rise, high resolution and high refresh rates have become major development directions for LCD panels.

[0003] However, LCD panels face insufficient charging issues at high refresh rates, affecting their display performance. The current common solution is to increase the charging rate by raising the TFT driving voltage difference. However, prolonged operation of TFTs under a large driving voltage difference can reduce device lifespan. Therefore, the industry practice is to sacrifice some display performance to maintain the LCD panel's driving voltage difference within a safe range, in order to consider TFT lifespan. Summary of the Invention

[0004] The purpose of this disclosure is to provide a driving method, apparatus, storage medium, and electronic device for a liquid crystal display panel, in order to solve the problem in the prior art where the display effect of the liquid crystal display panel is reduced in order to ensure the lifespan of the TFT.

[0005] The embodiments of this disclosure adopt the following technical solution: a driving method for a liquid crystal display panel, comprising: obtaining a first refresh rate corresponding to the current frame of the liquid crystal display panel; detecting whether the first refresh rate is the same as a second refresh rate corresponding to the previous frame; if the first refresh rate is different from the second refresh rate, determining a first driving voltage based on the first refresh rate; and driving the liquid crystal display panel using the first driving voltage.

[0006] In some embodiments, determining the first driving voltage based on the first refresh rate includes: determining a first voltage difference corresponding to the first refresh rate in a first lookup table; adjusting a second driving voltage based on the first voltage difference to obtain the first driving voltage, wherein the second driving voltage is the voltage used to drive the liquid crystal display panel to display the current frame.

[0007] In some embodiments, the second refresh rate corresponds to the second voltage difference; when the first refresh rate is higher than the second refresh rate, the first voltage difference is greater than the second voltage difference; when the first refresh rate is lower than the second refresh rate, the first voltage difference is less than the second voltage difference.

[0008] In some embodiments, determining the first driving voltage based on the first refresh rate includes: adjusting the second turn-on voltage and / or the second turn-off voltage in the second driving voltage according to the comparison between the first voltage difference and the second voltage difference, so as to obtain the first turn-on voltage and / or the first turn-off voltage, and making the voltage difference between the first turn-on voltage and the first turn-off voltage the first voltage difference.

[0009] In some embodiments, after determining the first driving voltage based on the first refresh rate, the method further includes: determining a first common voltage corresponding to the first voltage difference in a second lookup table; and applying the first common voltage to the common electrode of the liquid crystal display panel.

[0010] In some embodiments, driving the liquid crystal display panel with the first driving voltage includes: driving the liquid crystal display panel with the first driving voltage when the liquid crystal display panel displays the next frame.

[0011] This disclosure also provides a driving device for a liquid crystal display panel, comprising: an acquisition module for acquiring a first refresh rate corresponding to the current frame of the liquid crystal display panel; a detection module for detecting whether the first refresh rate is the same as a second refresh rate corresponding to the previous frame; a determination module for determining a first driving voltage based on the first refresh rate when the first refresh rate is different from the second refresh rate; and a driving module for driving the liquid crystal display panel using the first driving voltage.

[0012] This disclosure also provides a storage medium storing a computer program, characterized in that the computer program, when executed by a processor, implements the steps of the above-described liquid crystal display panel driving method.

[0013] This disclosure also provides an electronic device, which includes at least a memory, a processor, and a liquid crystal display panel. The memory stores a computer program, and the processor, when executing the computer program in the memory, implements the steps of the above-described driving method for the liquid crystal display panel.

[0014] In some embodiments, the liquid crystal display panel includes a storage unit that stores a first view table and / or a second view table.

[0015] The beneficial effects of this disclosure are as follows: the real-time refresh rate of the liquid crystal display panel is obtained, a new first driving voltage is determined by the first refresh rate of the current frame when the refresh rate changes, and the liquid crystal display panel is driven by the first driving voltage, so that the liquid crystal display panel is driven by the constantly changing driving voltage, thereby taking into account both service life and charging efficiency, and achieving the best display effect and user experience. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram showing the pressure applied to each electrode in a conventional TFT.

[0018] Figure 2 This is a flowchart of the driving method for the liquid crystal display panel in the first embodiment of this disclosure;

[0019] Figure 3 This is a schematic diagram illustrating the relationship between refresh rate and charging time in the first embodiment of this disclosure;

[0020] Figure 4 This is a schematic diagram illustrating the relationship between driving voltage difference and current in the first embodiment of this disclosure;

[0021] Figure 5 This is a curve showing the relationship between the turn-on voltage, turn-off voltage, voltage difference, and refresh rate in the first embodiment of this disclosure;

[0022] Figure 6 This is a curve showing the relationship between pressure difference and refresh rate in the first embodiment of this disclosure;

[0023] Figure 7 This is a timing diagram of various parameters during the driving process in the first embodiment of this disclosure;

[0024] Figure 8 This is a schematic diagram of the TFT connection in the first embodiment of this disclosure;

[0025] Figure 9 This is a schematic diagram illustrating the relationship between pixel voltage and common voltage in the first embodiment of this disclosure;

[0026] Figure 10 This is a graph showing the relationship between the voltage difference and the common voltage in the first embodiment of this disclosure;

[0027] Figure 11 This is a schematic diagram of the structure of the driving device for the liquid crystal display panel in the second embodiment of this disclosure;

[0028] Figure 12 This is a schematic diagram of the structure of the electronic device in the fourth embodiment of this disclosure. Detailed Implementation

[0029] Various embodiments and features of this disclosure are described herein with reference to the accompanying drawings.

[0030] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this disclosure will be apparent to those skilled in the art.

[0031] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present disclosure and, together with the general description of the disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.

[0032] These and other features of this disclosure will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0033] It should also be understood that although this disclosure has been described with reference to some specific examples, many other equivalent forms of this disclosure can be definitively implemented by those skilled in the art, which have the features of the claims and are therefore within the scope of protection defined herein.

[0034] The above and other aspects, features and advantages of this disclosure will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0035] Specific embodiments of this disclosure are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this disclosure, which may be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure this disclosure. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use this disclosure in a variety of substantially any suitable detailed structures.

[0036] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in still another embodiment,” all of which may refer to one or more of the same or different embodiments according to this disclosure.

[0037] Liquid crystal display panels control the liquid crystal layer at a specific location by controlling the on / off state of each TFT, thus enabling the display effect of the corresponding pixel after the liquid crystal flips. Figure 1The diagram illustrates the voltage application to the electrodes in a TFT. The TFT element used in a liquid crystal display panel is typically an N-type TFT. The primary driver for TFT switching is the driving voltage Vg applied to the TFT gate. When the voltage difference Vgs between Vg and the TFT source voltage Vs exceeds a certain threshold Vth, the TFT's source and drain electrodes are turned on, enabling signal transmission to control liquid crystal switching. Figure 1 In the diagram, Vd represents the drain voltage, and Id represents the current flowing through the TFT when it is turned on. As users' demands for viewing experience in electronic devices continue to increase, high resolution and high refresh rates have become a major development direction for LCD panels.

[0038] However, LCD panels face insufficient charging issues at high refresh rates, affecting their display performance. The common solution is to increase the charging rate by raising the TFT driving voltage difference (Vgs). However, prolonged operation of TFTs under a large driving voltage difference can reduce device lifespan. Therefore, the industry practice is to sacrifice some display performance to maintain the LCD panel's driving voltage difference within a safe range, considering TFT lifespan.

[0039] To address the aforementioned problems, the first embodiment of this disclosure provides a method for driving a liquid crystal display panel, the flowchart of which is shown below. Figure 2 As shown, it mainly includes steps S10 to S50:

[0040] S10, obtain the first refresh rate corresponding to the current frame of the LCD display panel.

[0041] LCD panels are typically installed in mobile phones, computers, televisions, or other electronic devices that require display functionality. These devices adjust the refresh rate of the displayed image based on the image's current processing power. Generally, the refresh rate of conventional electronic devices ranges from 48 Hz to 144 Hz, although it may be set below 48 Hz or above 144 Hz depending on the specific display requirements.

[0042] The driving method of this embodiment can obtain the first refresh rate of the current frame displayed by the electronic device controlling the liquid crystal display panel in real time. Specifically, the processor of the electronic device determines different refresh rates when displaying different content according to the requirements, and transmits the refresh rate to the Tcon board (driving board) connected to the liquid crystal display panel. The Tcon board then generates a corresponding driving waveform based on the refresh rate to apply the driving voltage to the TFT gate.

[0043] S20: Detect whether the first refresh rate is the same as the second refresh rate corresponding to the previous frame. If the first refresh rate and the second refresh rate are the same, proceed to step S30; otherwise, proceed to step S40.

[0044] S30, determine the first drive voltage based on the first refresh rate.

[0045] S40, the liquid crystal display panel continues to be driven based on the second driving voltage that displays the current frame.

[0046] For LCD panels, a higher refresh rate means a shorter TFT time between activations, resulting in a shorter charging time. Figure 3 As shown, when the refresh rate is increased, the duration of Vg being at a high level is shortened, and the charging time of Vd being at a high level will also be shortened accordingly (from t1 to t2). Figure 4 This diagram illustrates the relationship between the driving voltage difference (Vgs) and the current Id. Figure 4 It is known that when the refresh rate is increased, the Id value after the TFT is turned on can be increased by increasing the driving voltage to achieve a higher charging rate in a short time. If the refresh rate is low, the charging time is long. In this case, excessively high driving voltage and current Id are not required. The impact of driving voltage on TFT lifespan can be reduced by decreasing the magnitude of the driving voltage. Therefore, in this embodiment, after obtaining the first refresh rate of the current frame, it first detects whether the current first refresh rate has changed compared to the second refresh rate when the previous frame was first tested. If there is no change, the second driving voltage used to drive the liquid crystal display panel to display the current frame can still be used to continue driving. If the first refresh rate and the second refresh rate are different, the first driving voltage is determined using the first refresh rate, thereby using a more reasonable first driving voltage to ensure the stability of the charging rate.

[0047] For any given driving voltage, it is actually an AC signal, which includes at least the turn-on voltage VgH used to drive the TFT to turn on and the turn-off voltage VgL used to drive the TFT to turn off. The difference between the turn-on voltage and the turn-off voltage is the voltage difference ΔVg. Figure 5 The diagram shows the curves relating VgH, VgL, ΔVg, and refresh rate. These curves are based on practical experience in debugging LCD panels. The optimal charging rate is determined by adjusting VgH and VgL at different refresh rates, and the relationship between ΔVg and refresh rate is shown below. Figure 6 As shown. Based on Figure 6 It can be seen that ΔVg is positively correlated with the refresh rate. That is, when the refresh rate increases, the voltage difference ΔVg between the turn-on and turn-off voltages needs to be increased accordingly to ensure the charging rate. Conversely, when the refresh rate decreases, ΔVg can be decreased accordingly, utilizing a longer charging time to ensure the charging effect. Therefore, when the refresh rate changes, it is possible to... Figure 5 or Figure 6The curves shown correspond to adjustments in the values ​​of VgH and VgL. For example, at low refresh rates, the charging rate is relatively sufficient, so the absolute values ​​of VgH and VgL can be set to the minimum values ​​that meet the panel specifications. In this case, ΔV... gmin =VgH min -VgL min ΔV at the lowest refresh rate g Minimum value; conversely, charging rate is more strained at high refresh rates, in which case the absolute values ​​of VgH and VgL voltages need to be set to the maximum values ​​that meet the panel specifications, and ΔV at this time gmax =VgH max -VgL max ΔV at the highest refresh rate g Maximum value.

[0048] It is important to note that the high refresh rate and low refresh rate mentioned in this embodiment are not distinguished by a fixed threshold. The voltage difference can be adjusted by increasing or decreasing the voltage difference accordingly based on the increase or decrease of the refresh rate. Furthermore, due to factors such as LCD panel size, TFT model, manufacturing process, wiring layout, and usage environment, the relationship between ΔVg and refresh rate is not entirely the same for each LCD panel and may vary to some extent. However, the overall trend of the relationship between voltage difference and refresh rate is positively proportional. Therefore, for different LCD panels, the correspondence between refresh rate and voltage difference can be obtained through actual measurement, or the correspondence obtained after measuring a certain number of LCD panels can be used as a default correspondence. This correspondence can be encapsulated in the LCD panel or the corresponding Tcon board and read and used when needed.

[0049] In actual implementation, after obtaining the first refresh rate, the Tcon board determines the first voltage difference ΔVg1 corresponding to the first refresh rate in the first lookup table. The first lookup table stores the correspondence between the current refresh rate of the LCD panel and the voltage difference. After determining the first voltage difference ΔVg1 from the first lookup table, the second driving voltage can be adjusted according to ΔVg1. By increasing or decreasing the value of the second turn-on voltage or the second turn-off voltage in the second driving voltage, it is adjusted to the first turn-on voltage and the first turn-off voltage, so that the voltage difference between the first turn-on voltage and the first turn-off voltage is the first voltage difference ΔVg1. At this time, the LCD panel can have the optimal charging rate at the first refresh rate.

[0050] Combination Figure 6It can be seen that when the first refresh rate is higher than the second refresh rate, the first voltage difference ΔVg1 is greater than the second voltage difference ΔVg2 corresponding to the second refresh rate; when the first refresh rate is lower than the second refresh rate, the first voltage difference ΔVg1 is less than the second voltage difference ΔVg2 corresponding to the second refresh rate. Therefore, when making adjustments, the second turn-on voltage and / or the second turn-off voltage of the second driving voltage can be adjusted according to the relationship between the first voltage difference ΔVg1 and the second voltage difference ΔVg2 to obtain the first turn-on voltage and / or the first turn-off voltage, so that the voltage difference between the first turn-on voltage and the first turn-off voltage is the first voltage difference.

[0051] Specifically, when the first voltage difference ΔVg1 is greater than the second voltage difference ΔVg2, it indicates that the difference between the turn-on voltage and the turn-off voltage needs to be increased. This can be achieved by increasing the turn-on voltage or decreasing the turn-off voltage. In practice, for higher refresh rates of 144 Hz and above, the voltage difference can be increased mainly by increasing the turn-on voltage. For lower refresh rates of 48 Hz and below, the voltage difference can be increased mainly by decreasing the turn-off voltage. For refresh rate adjustments between 48 Hz and 144 Hz, either the turn-on voltage or the turn-off voltage can be adjusted or adjusted simultaneously, depending on the actual situation. This embodiment does not limit the specific adjustment method of VgH and VgL, but it should at least ensure that the adjusted VgH and VgL are reasonable and meet the normal on / off driving of the TFT.

[0052] S50 uses the first driving voltage to drive the liquid crystal display panel.

[0053] After determining the first driving voltage, the Tcon board can drive the liquid crystal display panel according to the first driving voltage. This is mainly used to drive each TFT element in the liquid crystal display panel, ensuring it has the optimal charging rate at the current first refresh rate. In actual implementation, since the liquid crystal display panel refreshes line by line, if the operation of driving the liquid crystal display panel with the first driving voltage by the Tcon board is performed directly during the display of the current frame, it may cause abnormal display effects (such as brightness variations or uneven brightness). Therefore, the first driving voltage can be used to drive the liquid crystal display panel when displaying the next frame, minimizing the impact of driving voltage changes on the normal operation of the display panel. Figure 7 The timing diagram of various parameters during the driving process is shown. V-Blanking is the reset area of ​​the liquid crystal display panel between two adjacent frames. STV0 represents the time when the current display frame (the nth frame) is completed. STV1 is the time when the next frame (the n+1th frame) starts to be displayed. The adjustment of VgH and VgL is set between STV0 and STV1 to avoid the impact of real-time parameter adjustment on the display screen.

[0054] This embodiment obtains the real-time refresh rate of the liquid crystal display panel. When the refresh rate changes, a new first driving voltage is determined using the first refresh rate of the current frame. The liquid crystal display panel is then driven by this first driving voltage, so that the liquid crystal display panel is driven by the constantly changing driving voltage. This balances lifespan and charging efficiency, achieving the best display effect and user experience.

[0055] In some embodiments, the feed-through voltage of the liquid crystal display panel changes when VgH and VgL change, reference... Figure 8 The diagram showing the TFT connection illustrates that the Feed Through voltage is the voltage applied to point D by the source line, which, after passing through the TFT, is actually applied to the pixel of the liquid crystal display panel. This can be understood as the pixel voltage Vp between Cgs (the capacitance between the gate line and point S) and Clc (the pixel corresponding to the TFT). The value of Vp changes with VgH and VgL, forming ΔVp. Figure 9 As shown, the common voltage Vcom is the average voltage of the pixel when it is in the on and off state, in order to ensure a balanced display effect. When ΔVp is formed, the value of Vcom needs to be adjusted accordingly to avoid display defects such as flickering on the display panel.

[0056] Specifically, the relationship between ΔVp and ΔVg is shown in formula (1):

[0057]

[0058] Among them, C gd C lc And C st These represent the capacitance values ​​of the capacitors at the corresponding locations. Based on the change in ΔVg, the change in ΔVp can be determined. Furthermore, by combining the relationship between the refresh rate and ΔVg, a relationship curve between ΔVg and Vcom can be established, as shown below. Figure 10 As shown, the correspondence between ΔVg and Vcom is compiled into a second reference table and stored. It should be understood that the correspondence curve between ΔVg and Vcom is also obtained by combining actual measurements. Different LCD panels may have different correspondence curves between ΔVg and Vcom, but the two are generally proportional. In actual use, adjustments can be made according to the actual situation.

[0059] Based on the information stored in the second lookup table, the Tcon board, while adjusting VgH and VgL, can also determine the first common voltage that matches the current refresh rate from the second lookup table, based on the correspondence between ΔVg and Vcom. When driving the liquid crystal display panel with the first driving voltage, the first common voltage is then applied to the common electrode in the panel. (Reference) Figure 7Vcom can also be adjusted in the V-blanking range, and can be adjusted simultaneously with VgH and VgL.

[0060] In practical use, when the refresh rate changes within a certain range, the corresponding VgH and VgL values ​​will also fluctuate within a certain range. At this time, by setting the same VgH and VgL values ​​for refresh rates within a certain range, the amount of storage required for the corresponding input in the lookup table can be reduced, and the changes in the drive voltage can be reduced to some extent, as shown in Table 1.

[0061] Table 1

[0062] Refresh rate (Hz) VgH(V) VgL(V) Vcom(V) 144～120 25 -6 7.1 119～96 23.5 -8 7.2 95～72 22 -10 7.3 71～48 20.5 -12 7.4

[0063] It should be noted that Table 1 above only shows one possible driving voltage for refresh rates varying within the commonly used frequency band of 48 to 144 Hz. Specifically, when the refresh rate varies between 48 and 71 Hz, the corresponding driving voltages can be 20.5V and -12V. This means that the values ​​of VgH and VgL at this point can balance pixel lifespan and charging efficiency. Switching between VgH and VgL is only necessary when the refresh rate changes from 71 Hz to 72 Hz. Furthermore, the refresh rate segments and corresponding voltage values ​​recorded in Table 1 are only feasible examples. Adjustments can be made based on actual needs and equipment conditions during practical use. This embodiment will not elaborate on these details.

[0064] The second embodiment of this disclosure provides a driving device for a liquid crystal display panel. This device can be a processor or similar component with processing capabilities within a Tcon board. A schematic diagram of its structure is shown below. Figure 11 As shown, it mainly includes an acquisition module 10, a detection module 20, a determination module 30, and a driving module 40. The acquisition module 10 is used to acquire the first refresh rate corresponding to the current frame of the liquid crystal display panel; the detection module 20 is used to detect whether the first refresh rate is the same as the second refresh rate corresponding to the previous frame; the determination module 30 is used to determine the first driving voltage according to the first refresh rate when the first refresh rate and the second refresh rate are different; and the driving module 40 is used to drive the liquid crystal display panel using the first driving voltage.

[0065] In some embodiments, the determining module 30 is specifically used to determine the first voltage difference corresponding to the first refresh rate in the first viewing table; and to adjust the second driving voltage according to the first voltage difference to obtain the first driving voltage, wherein the second driving voltage is the voltage used to drive the liquid crystal display panel to display the current frame.

[0066] Specifically, the second refresh rate corresponds to the second voltage difference; when the first refresh rate is higher than the second refresh rate, the first voltage difference is greater than the second voltage difference; when the first refresh rate is lower than the second refresh rate, the first voltage difference is less than the second voltage difference. In some embodiments, the determining module 30 is specifically used to adjust the second turn-on voltage and / or the second turn-off voltage in the second driving voltage according to the comparison between the first voltage difference and the second voltage difference, so as to obtain the first turn-on voltage and / or the first turn-off voltage, and make the voltage difference between the first turn-on voltage and the first turn-off voltage the first voltage difference.

[0067] In some embodiments, the determining module 30 is further configured to determine the first common voltage corresponding to the first differential pressure in the second lookup table; the driving module 40 is further configured to apply the first common voltage to the common electrode of the liquid crystal display panel.

[0068] In some embodiments, the driving module 40 is specifically used to drive the liquid crystal display panel using a first driving voltage when the liquid crystal display panel displays the next frame.

[0069] This embodiment obtains the real-time refresh rate of the liquid crystal display panel. When the refresh rate changes, a new first driving voltage is determined using the first refresh rate of the current frame. The liquid crystal display panel is then driven by this first driving voltage, so that the liquid crystal display panel is driven by the constantly changing driving voltage. This balances lifespan and charging efficiency, achieving the best display effect and user experience.

[0070] The third embodiment of this disclosure provides a storage medium that can be installed in a Tcon board for driving a liquid crystal display panel. Specifically, it is a computer-readable medium storing a computer program. When executed by a processor, the computer program implements the method provided in any embodiment of this disclosure, including the following steps S31 to S34:

[0071] S31, Obtain the first refresh rate corresponding to the current frame of the LCD display panel;

[0072] S32, detect whether the first refresh rate is the same as the second refresh rate corresponding to the previous frame;

[0073] S33, when the first refresh rate and the second refresh rate are different, determine the first driving voltage according to the first refresh rate;

[0074] S34 uses the first driving voltage to drive the liquid crystal display panel.

[0075] When the computer program is executed by the processor to determine the first driving voltage based on the first refresh rate, the processor specifically performs the following steps: determining the first voltage difference corresponding to the first refresh rate in the first lookup table; adjusting the second driving voltage based on the first voltage difference to obtain the first driving voltage, wherein the second driving voltage is the voltage that drives the liquid crystal display panel to display the current frame.

[0076] Specifically, the second refresh rate corresponds to the second pressure difference; when the first refresh rate is higher than the second refresh rate, the first pressure difference is greater than the second pressure difference; when the first refresh rate is lower than the second refresh rate, the first pressure difference is less than the second pressure difference.

[0077] When the computer program is executed by the processor to determine the first driving voltage according to the first refresh rate, the processor specifically performs the following steps: based on the comparison between the first voltage difference and the second voltage difference, the second turn-on voltage and / or the second turn-off voltage in the second driving voltage are adjusted to obtain the first turn-on voltage and / or the first turn-off voltage, so that the voltage difference between the first turn-on voltage and the first turn-off voltage is the first voltage difference.

[0078] After the computer program is executed by the processor to determine the first driving voltage according to the first refresh rate, the processor also performs the following steps: determining the first common voltage corresponding to the first voltage difference in the second lookup table; and applying the first common voltage to the common electrode of the liquid crystal display panel.

[0079] When a computer program is executed by a processor to drive a liquid crystal display panel using a first driving voltage, the processor specifically performs the following steps: when the liquid crystal display panel displays the next frame, it drives the liquid crystal display panel using the first driving voltage.

[0080] This embodiment obtains the real-time refresh rate of the liquid crystal display panel. When the refresh rate changes, a new first driving voltage is determined using the first refresh rate of the current frame. The liquid crystal display panel is then driven by this first driving voltage, so that the liquid crystal display panel is driven by the constantly changing driving voltage. This balances lifespan and charging efficiency, achieving the best display effect and user experience.

[0081] The fourth embodiment of this disclosure provides an electronic device, which can be a mobile phone, computer, television, or any electronic device with display function. Its structure includes at least a memory 100, a processor 200, and a liquid crystal display panel 300, as shown in the schematic diagram below. Figure 12 As shown, a computer program is stored on the memory 100, and the processor 200 implements the method provided in any embodiment of this disclosure when executing the computer program on the memory 100. Exemplarily, the steps of the electronic device computer program are as follows: S41 to S44:

[0082] S41, Obtain the first refresh rate corresponding to the current frame of the LCD display panel;

[0083] S42, detect whether the first refresh rate is the same as the second refresh rate corresponding to the previous frame;

[0084] S43, when the first refresh rate and the second refresh rate are different, determine the first driving voltage according to the first refresh rate;

[0085] S44 uses the first driving voltage to drive the liquid crystal display panel.

[0086] When the processor executes the memory-stored method for determining the first driving voltage based on the first refresh rate, it specifically executes the following computer program: determining the first voltage difference corresponding to the first refresh rate in the first lookup table; adjusting the second driving voltage according to the first voltage difference to obtain the first driving voltage, wherein the second driving voltage is the voltage that drives the liquid crystal display panel to display the current frame.

[0087] Specifically, the second refresh rate corresponds to the second pressure difference; when the first refresh rate is higher than the second refresh rate, the first pressure difference is greater than the second pressure difference; when the first refresh rate is lower than the second refresh rate, the first pressure difference is less than the second pressure difference.

[0088] When the processor executes the memory-stored determination of the first driving voltage based on the first refresh rate, it specifically executes the following computer program: based on the comparison between the first voltage difference and the second voltage difference, it adjusts the second turn-on voltage and / or the second turn-off voltage in the second driving voltage to obtain the first turn-on voltage and / or the first turn-off voltage, so that the voltage difference between the first turn-on voltage and the first turn-off voltage is the first voltage difference.

[0089] After the processor executes the memory stored in which the first driving voltage is determined according to the first refresh rate, it also executes the following computer program: determining the first common voltage corresponding to the first voltage difference in the second lookup table; and applying the first common voltage to the common electrode of the liquid crystal display panel.

[0090] When the processor executes the computer program stored in memory that drives the liquid crystal display panel with the first driving voltage, it specifically executes the following program: when the liquid crystal display panel displays the next frame, it drives the liquid crystal display panel with the first driving voltage.

[0091] This embodiment obtains the real-time refresh rate of the liquid crystal display panel. When the refresh rate changes, a new first driving voltage is determined using the first refresh rate of the current frame. The liquid crystal display panel is then driven by this first driving voltage, so that the liquid crystal display panel is driven by the constantly changing driving voltage. This balances lifespan and charging efficiency, achieving the best display effect and user experience.

[0092] It should be noted that the processor 200 in this embodiment mainly refers to the Tcon board used to drive the liquid crystal display panel 300. The first lookup table and the second lookup table can be stored in the memory 100 or in the storage unit 301 included in the liquid crystal display panel 300. In actual manufacturing, the liquid crystal display panel 300 and the Tcon board are usually manufactured separately and then assembled at the factory. The first lookup table and the second lookup table store the refresh rate and voltage difference corresponding to the current liquid crystal display panel 300, as well as the correspondence between the voltage difference and the common voltage. Due to the differences between different panels, the correspondence stored in different liquid crystal display panels 300 also differs. Therefore, storing the first lookup table and the second lookup table in the storage unit built into the panel can facilitate the Tcon board to directly obtain the correspondence stored in the panel after assembly, simplifying the configuration process before leaving the factory.

[0093] The foregoing has provided a detailed description of several embodiments of this disclosure. However, this disclosure is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications based on the concept of this disclosure, and all such variations and modifications should fall within the scope of protection claimed by this disclosure.

Claims

1. A driving method for a liquid crystal display panel, characterized in that, include: Obtain the first refresh rate corresponding to the current frame of the LCD display panel; Detect whether the first refresh rate is the same as the second refresh rate corresponding to the previous frame; When the first refresh rate is different from the second refresh rate, the first driving voltage is determined based on the first refresh rate; The liquid crystal display panel is driven using the first driving voltage; Determining the first driving voltage based on the first refresh rate includes: The first voltage difference corresponding to the first refresh rate is determined in the first lookup table; the second driving voltage is adjusted according to the first voltage difference to obtain the first driving voltage, wherein the second driving voltage is the voltage that drives the liquid crystal display panel to display the current frame; The second refresh rate corresponds to the second voltage difference; when the first refresh rate is higher than the second refresh rate, the first voltage difference is greater than the second voltage difference; When the first refresh rate is lower than the second refresh rate, the first voltage difference is less than the second voltage difference; Determining the first driving voltage based on the first refresh rate includes: Based on the comparison between the first voltage difference and the second voltage difference, the second turn-on voltage and / or the second turn-off voltage in the second driving voltage are adjusted to obtain the first turn-on voltage and / or the first turn-off voltage, so that the voltage difference between the first turn-on voltage and the first turn-off voltage is the first voltage difference, the voltage used to drive the TFT to conduct is the turn-on voltage, and the voltage used to drive the TFT to turn off is the turn-off voltage. First pressure difference Greater than the second pressure difference When the refresh rate is 144 Hz or higher, the voltage difference is increased by increasing the turn-on voltage. When the refresh rate is 48 Hz or lower, the voltage difference is increased by decreasing the turn-off voltage. For refresh rate adjustment between 48 Hz and 144 Hz, either the turn-on voltage or the turn-off voltage can be adjusted, or both can be adjusted simultaneously. After determining the first driving voltage based on the first refresh rate, the method further includes: While adjusting the turn-on and turn-off voltages, in combination The correspondence between the first voltage difference and the first common voltage is determined in the second lookup table to identify the first common voltage corresponding to the first voltage difference. The first common voltage is applied to the common electrode of the liquid crystal display panel.

2. The driving method according to claim 1, characterized in that, The step of driving the liquid crystal display panel using the first driving voltage includes: The liquid crystal display panel is driven by the first driving voltage when the next frame is displayed on the liquid crystal display panel.

3. A driving device for a liquid crystal display panel, used to implement the driving method for a liquid crystal display panel as described in claim 1, characterized in that, The driving device includes: The acquisition module is used to acquire the first refresh rate corresponding to the current frame of the LCD display panel; The detection module is used to detect whether the first refresh rate is the same as the second refresh rate corresponding to the previous frame; The determining module is used to determine the first driving voltage based on the first refresh rate when the first refresh rate is different from the second refresh rate; Determining the first driving voltage based on the first refresh rate includes: The first voltage difference corresponding to the first refresh rate is determined in the first lookup table; the second driving voltage is adjusted according to the first voltage difference to obtain the first driving voltage, wherein the second driving voltage is the voltage that drives the liquid crystal display panel to display the current frame; The second refresh rate corresponds to the second voltage difference; when the first refresh rate is higher than the second refresh rate, the first voltage difference is greater than the second voltage difference; When the first refresh rate is lower than the second refresh rate, the first voltage difference is less than the second voltage difference; Determining the first driving voltage based on the first refresh rate includes: Based on the comparison between the first voltage difference and the second voltage difference, the second turn-on voltage and / or the second turn-off voltage in the second driving voltage are adjusted to obtain the first turn-on voltage and / or the first turn-off voltage, so that the voltage difference between the first turn-on voltage and the first turn-off voltage is the first voltage difference, the voltage used to drive the TFT to conduct is the turn-on voltage, and the voltage used to drive the TFT to turn off is the turn-off voltage. First pressure difference Greater than the second pressure difference When the refresh rate is 144 Hz or higher, the voltage difference is increased by increasing the turn-on voltage. When the refresh rate is 48 Hz or lower, the voltage difference is increased by decreasing the turn-off voltage. For refresh rate adjustment between 48 Hz and 144 Hz, either the turn-on voltage or the turn-off voltage can be adjusted, or both can be adjusted simultaneously. A driving module is used to drive the liquid crystal display panel using the first driving voltage.

4. A storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the driving method for the liquid crystal display panel according to any one of claims 1 to 2.

5. An electronic device, comprising at least a memory, a processor, and a liquid crystal display panel, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program on the memory, it implements the steps of the driving method for the liquid crystal display panel according to any one of claims 1 to 2.

6. The electronic device according to claim 5, characterized in that, The liquid crystal display panel includes a storage unit, which stores a first view table and / or a second view table.

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