Liquid crystal display device and driving method, debugging method and program product thereof

Abstract

The invention provides a liquid crystal display device and a driving method, a debugging method and a program product thereof. The driving method comprises the following steps: acquiring a first gray-scale value corresponding to a first frame of a target pixel and a second gray-scale value corresponding to a second frame of the target pixel; carrying out level chopping processing on the second gray-scale value to obtain a third gray-scale value; under the condition that the second gray-scale value is greater than the first gray-scale value, performing overshoot processing on the third gray-scale value to obtain a fourth gray-scale value; and outputting the fourth gray-scale value to a source electrode driving chip, so that the source electrode driving chip matches the fourth gray-scale value with a first gamma voltage comparison table to obtain a first driving voltage corresponding to the target pixel in the second frame. By increasing the original AVDD voltage, the reference voltage limitation of the Gamma IC is broken through, and a higher driving voltage space is provided for a high gray scale; through overshoot processing, higher driving voltage can act on the display panel, the steering speed of liquid crystal molecules is remarkably increased, and picture smear and operation delay are reduced.

Description

Technical Field

[0001] This application belongs to the field of liquid crystal display technology, and in particular relates to a liquid crystal display device and its driving method, debugging method and program product. Background Technology

[0002] The response time of an LCD refers to the time (in milliseconds) required for a pixel in an LCD display to switch from one color to another. The response time of an LCD is an important indicator of the performance of an LCD display device. A longer response time can lead to image ghosting and operation delays.

[0003] Existing technologies typically shorten grayscale switching time through the OD (OverDrive) function of the SoC (System on Chip) and employ dynamic Gamma technology to adjust the curve slope and increase the voltage difference between mid- and low-grayscale levels to optimize response speed in dark scenes. However, for scenarios where any grayscale switches to L255, existing solutions have significant limitations: the Gamma voltage corresponding to L255 is already the highest voltage output by the Gamma IC, and the overdrive function cannot further increase the driving voltage of the display panel to enhance the orientation capability of liquid crystal molecules, ultimately making it difficult to overcome the limitations in response time for scenarios where any grayscale switches to L255. Summary of the Invention

[0004] This application provides a liquid crystal display device and its driving method, debugging method, and program product, which can solve the problem that the liquid crystal switching speed cannot be improved in scenarios where any grayscale is switched to L255.

[0005] In a first aspect, embodiments of this application provide a driving method for a liquid crystal display device, including:

[0006] Obtain the first grayscale value of the target pixel in the first frame and the second grayscale value in the second frame; wherein the second frame is the frame following the first frame; The second grayscale value is reduced to obtain the third grayscale value; If the second grayscale value is greater than the first grayscale value, the third grayscale value is over-over-processed to obtain the fourth grayscale value; The fourth grayscale value is output to the source driver chip, so that the source driver chip matches the fourth grayscale value with the first gamma voltage lookup table to obtain the first driving voltage corresponding to the target pixel in the second frame; wherein, the first gamma voltage lookup table is obtained by refitting the gamma curve after increasing the original AVDD voltage; and the first driving voltage is greater than the second driving voltage corresponding to the fourth grayscale value in the original gamma voltage lookup table, which is obtained by fitting the gamma curve based on the original AVDD voltage.

[0007] In one possible implementation of the first aspect, the method further includes: Obtain the fifth grayscale value of the target pixel in the third frame; wherein, the third frame is the frame following the second frame; The fifth grayscale value is subjected to the aforementioned grayscale reduction process to obtain the sixth grayscale value; If the fifth grayscale value is less than or equal to the second grayscale value, the sixth grayscale value is output to the source driver chip so that the source driver chip matches the sixth grayscale value with the first gamma voltage lookup table to obtain the third driving voltage corresponding to the target pixel in the third frame; the third driving voltage is less than the first driving voltage, and the difference between the third driving voltage and the second driving voltage is within a preset range.

[0008] In one possible implementation of the first aspect, the step of reducing the grayscale value of the second grayscale value to obtain the third grayscale value includes: Obtain a first lookup table, which reflects the correspondence between the grayscale values ​​before and after grayscale reduction; Based on the first lookup table, determine the third grayscale value corresponding to the second grayscale value after reduction.

[0009] In one possible implementation of the first aspect, the overshooting of the third grayscale value to obtain the fourth grayscale value includes: Obtain a second lookup table, which is used to reflect the correspondence between the grayscale values ​​before the overshooting process and the grayscale values ​​after the overshooting process; According to the second lookup table, determine the fourth gray level value corresponding to the third gray level value after the overshooting process.

[0010] Secondly, embodiments of this application provide a liquid crystal display device, including: a timing control chip and a source driver chip, wherein the timing control chip includes an automatic contrast control module and a first overshoot module; The timing control chip is configured to: acquire a first grayscale value corresponding to a first frame of a target pixel and a second grayscale value corresponding to a second frame; wherein the second frame is the frame following the first frame; The automatic contrast control module is configured to: perform a reduction process on the second grayscale value to obtain a third grayscale value; The first overshoot module is configured to: when the second grayscale value is greater than the first grayscale value, perform overshoot processing on the third grayscale value to obtain a fourth grayscale value; The timing control chip is further configured to: output the fourth grayscale value to the source driver chip, so that the source driver chip matches the fourth grayscale value with a first gamma voltage lookup table to obtain the first driving voltage corresponding to the target pixel in the second frame; wherein, the first gamma voltage lookup table is obtained by refitting the gamma curve after increasing the original AVDD voltage; and, the first driving voltage is greater than the second driving voltage corresponding to the fourth grayscale value in the original gamma voltage lookup table, the original gamma voltage lookup table being obtained by fitting the gamma curve based on the original AVDD voltage.

[0011] In one possible implementation of the second aspect, the timing control chip is further configured to: acquire the fifth grayscale value of the target pixel in the third frame; wherein the third frame is the frame following the second frame; The automatic contrast control module is further configured to perform the level reduction process on the fifth grayscale value to obtain a sixth grayscale value; The timing control chip is further configured to: when the fifth grayscale value is less than or equal to the second grayscale value, output the sixth grayscale value to the source driver chip, so that the source driver chip matches the sixth grayscale value with the first gamma voltage lookup table to obtain the third driving voltage corresponding to the target pixel in the third frame; the third driving voltage is less than the first driving voltage, and the difference between the third driving voltage and the second driving voltage is within a preset range.

[0012] In one possible implementation of the second aspect, the automatic contrast control module is specifically configured as follows: Obtain a first lookup table, which reflects the correspondence between the grayscale values ​​before and after grayscale reduction; Based on the first lookup table, determine the third grayscale value corresponding to the second grayscale value after reduction.

[0013] In one possible implementation of the second aspect, the first overshoot module is specifically configured as follows: Obtain a second lookup table, which is used to reflect the correspondence between the grayscale values ​​before the overshooting process and the grayscale values ​​after the overshooting process; According to the second lookup table, determine the fourth gray level value corresponding to the third gray level value after the overshooting process.

[0014] Thirdly, embodiments of this application provide a debugging method for a liquid crystal display device, applied to a debugging terminal, the method comprising: Increase the original AVDD voltage to obtain the first AVDD voltage; Based on the first AVDD voltage, the gamma curve is refitted to obtain a first gamma voltage reference table; wherein, the fourth driving voltage corresponding to the target gray level value in the first gamma voltage reference table is greater than the fifth driving voltage corresponding to the target gray level value in the original gamma voltage reference table, and the original gamma voltage reference table is obtained by fitting the gamma curve based on the original AVDD voltage; the target gray level value is any gray level value other than 0 gray level. The grayscale values ​​in the first gamma voltage lookup table are reduced in size to obtain a first lookup table. The first lookup table is used to reflect the correspondence between the grayscale values ​​before and after the reduction in size. The difference between the sixth driving voltage and the fifth driving voltage corresponding to the sixth grayscale value obtained after the reduction in size of the target grayscale value is within a first preset range. The grayscale values ​​after the step reduction processing in the first lookup table are over-overshot to obtain a second lookup table; the second lookup table is used to reflect the correspondence between the grayscale values ​​before the over-overshot processing and the grayscale values ​​after the over-overshot processing; wherein, the difference between the eighth driving voltage and the fourth driving voltage corresponding to the seventh grayscale value obtained after the over-overshot processing of the sixth grayscale value is within a second preset range in the first gamma voltage lookup table.

[0015] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method as described in any one of the first aspects.

[0016] Fifthly, embodiments of this application provide a computer program product that, when run on an electronic device, causes the electronic device to perform the method described in any one of the first aspects above.

[0017] It is understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here.

[0018] The beneficial effects of this application embodiment compared with the prior art are as follows: This application embodiment breaks through the reference voltage limit of Gamma IC by increasing the original AVDD voltage, providing a higher driving voltage space for high grayscale (including L255); the grayscale reduction processing can effectively solve the brightness reversal problem that may be caused by increasing the driving voltage, while the overshoot processing can make a higher driving voltage act on the display panel, significantly improving the turning speed of liquid crystal molecules, thereby greatly shortening the response time of grayscale increase scene (including any grayscale switching to L255 scene), reducing screen ghosting and operation delay, and improving the display performance and user experience of the display panel. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, 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 of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a flowchart illustrating the debugging method of the liquid crystal display device provided in the embodiments of this application; Figure 2 This is a schematic diagram showing the brightness of the display panel as a function of voltage, provided in an embodiment of this application. Figure 3 This is a schematic diagram of the response time of the liquid crystal before increasing the Gamma voltage (original Gamma voltage) according to an embodiment of this application; Figure 4 This is a schematic diagram illustrating how increasing the Gamma voltage speeds up the response time of the liquid crystal, as provided in an embodiment of this application. Figure 5 This is a schematic diagram of the liquid crystal response time of the scaling-down scheme ① provided in the embodiments of this application; Figure 6A This is a schematic diagram of the liquid crystal response time of the chopping scheme ② provided in an embodiment of this application; Figure 6B This is a schematic diagram of the liquid crystal response time of the chopping scheme ② provided in another embodiment of this application; Figure 7 This is a schematic diagram of the liquid crystal response time of the chopping scheme ③ provided in the embodiments of this application; Figure 8 This is the output grayscale logic block diagram of SOC OD paired with TCON OD provided in the embodiments of this application; Figure 9 This is a schematic diagram of the liquid crystal response time under the combined effect of the step reduction scheme ① and overshoot processing provided in the embodiments of this application; Figure 10This is a schematic diagram of the liquid crystal response time under the combined effect of the step reduction scheme ② and overshoot processing provided in the embodiments of this application; Figure 11 This is a schematic diagram of the liquid crystal response time under the combined effect of the step reduction scheme ③ and overshoot processing provided in the embodiments of this application; Figure 12 This is a schematic flowchart of the driving method for the liquid crystal display device provided in the embodiments of this application; Figure 13 This is a schematic diagram of the grayscale switching process in the existing conventional mode; Figure 14 This is a schematic diagram of the grayscale switching process provided in the embodiments of this application; Figure 15 This is a structural block diagram of the driving device for the liquid crystal display device provided in the embodiments of this application. Detailed Implementation

[0021] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0022] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0023] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0024] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0025] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0027] The response time of an LCD refers to the time (in milliseconds) required for a pixel in an LCD display to switch from one color to another. It includes rise time (dark to bright) and fall time (bright to dark). The gray-to-gray (GTG) response time is a core performance indicator for gaming LCD displays, affecting the degree of ghosting and input lag. If the LCD's response time can be controlled within 1ms, it means extremely fast pixel switching, significantly reducing ghosting in fast-paced games and improving image clarity and player reaction speed.

[0028] Existing solutions for shortening the response time of liquid crystal displays (LCDs) involve using the overdrive (OD) function of a system-on-chip (SoC) to accelerate the response time when switching from one grayscale level to the next, and using a dynamic gamma IC (gamma chip) to adjust the slope of the gamma curve, increasing the voltage difference between low and medium grayscale levels, and improving the response speed of the LCD in dark scenes. However, for switching from any grayscale level (excluding grayscale 255), since the gamma1 voltage corresponding to grayscale 255 is the highest among a set of 14 gamma voltages, the overdrive function of the SoC cannot overdrive to a higher gamma voltage value. Furthermore, the upper limit of gamma1 in the dynamic gamma scheme is limited by the reference voltage (Vref voltage) inside the gamma IC, thus failing to shorten the response time from any grayscale level to grayscale 255. In particular, the liquid crystal response time from grayscale 0 to grayscale 255 is slower than the switching between other grayscale levels, and it has a significant impact on the overall response time of the LCD device. Therefore, shortening the response time when switching from any gray level to 255 gray level can greatly accelerate the overall response time of the LCD display device.

[0029] Example 1: Figure 1This paper illustrates a flowchart of a debugging method for a liquid crystal display device according to an embodiment of this application. The method is applied to a debugging terminal and includes: S110: Increase the original AVDD voltage to obtain the first AVDD voltage.

[0030] Debugging personnel use the power management integrated circuit (PMIC) debugging software deployed in the debugging terminal to gradually and incrementally increase the original AVDD voltage (analog power supply voltage, analog signal controlling grayscale) within the design specifications of the LCD display panel, ensuring that... (The specific increase depends on the actual display panel design.) Note: AVDD must be operated within the display panel's design specifications to avoid damaging components. After the increase, system stability must be verified to obtain the final AVDD voltage. The original AVDD voltage is the analog power supply voltage before adjustment.

[0031] S120: Refit the gamma curve based on the first AVDD voltage to obtain the first gamma voltage reference table; wherein, the fourth driving voltage corresponding to the target gray level value in the first gamma voltage reference table is greater than the fifth driving voltage corresponding to the target gray level value in the original gamma voltage reference table, and the original gamma voltage reference table is obtained by fitting the gamma curve based on the original AVDD voltage; the target gray level value is any gray level value other than 0 gray level.

[0032] Principle: Since the Gamma IC outputs a Gamma voltage, it requires a reference voltage (Vref), which is provided by AVDD. By increasing the original AVDD voltage, the limitation of the reference voltage (Vref) of the Gamma IC can be removed, expanding the space for providing Gamma voltage. This creates conditions for increasing the driving voltage corresponding to higher gray levels, thereby enhancing the orientation driving force of liquid crystal molecules and accelerating the switching speed of the liquid crystal.

[0033] Specifically, after obtaining the first AVDD voltage, the parameters are adjusted using the Gamma-related debugging software deployed in the debugging terminal: First, adjust the endpoints: change the Gamma voltage corresponding to the highest grayscale L255 from its original value. Promoted to a new value ,ensure (The specific improvement depends on the actual display panel design). Simultaneously, the voltage of the lowest grayscale level L0 is kept stable to maintain black levels and ensure contrast. Next, the Gamma curve is refitted: because only the endpoints are adjusted, the Gamma curve for the intermediate grayscale levels will deviate significantly. Then, the Gamma voltage values ​​for the intermediate grayscale levels are adjusted, and the Gamma 2.2 curve is refitted to smooth the brightness and color temperature transition of the intermediate grayscale levels, resulting in the first gamma voltage reference table.

[0034] The fourth driving voltage corresponding to the target grayscale value in the first gamma voltage lookup table is significantly greater than the fifth driving voltage corresponding to the same target grayscale value (such as L255) in the original gamma voltage lookup table (based on the original AVDD voltage fitting). This step establishes a gamma voltage mapping relationship with a higher voltage range, providing a stronger driving voltage foundation for grayscale increase scenarios and breaking through the upper limit bottleneck of gamma voltage in existing technologies.

[0035] See Figure 2 , Figure 2 The diagram illustrates the change in brightness of a display panel as a function of voltage, as provided in an embodiment of this application. If the brightness of L255 in the first gamma voltage lookup table is measured, it will be found that the brightness of L255 on the display panel... It will be lower than the initial brightness. This is because increasing the Gamma voltage exceeds the inversion point of the liquid crystal properties, causing a decrease, which will be compensated and corrected in S130.

[0036] See Figure 3 and Figure 4 , Figure 3 This illustration shows a schematic diagram of the response time of the liquid crystal before increasing the Gamma voltage (original Gamma voltage) according to an embodiment of this application. Figure 4 This illustration shows a schematic diagram illustrating how increasing the Gamma voltage speeds up the response time of liquid crystals, as provided in an embodiment of this application. Increasing the Gamma voltage enhances the driving ability of liquid crystal molecules to orient themselves, thus speeding up grayscale switching (e.g., ...). Figure 4 Increasing the Gamma voltage increases the slope of the waveform, thereby shortening the response time of the liquid crystal (response time ② < response time ①). However, the brightness of the L255 display panel will decrease because the increased Gamma voltage exceeds the inversion point of the liquid crystal characteristics.

[0037] It should be noted that the common practice in the industry for calculating the response time of liquid crystals is to calculate 10%-90% of the difference between the brightness of the target grayscale and the brightness of the initial grayscale. The embodiments in this application follow the same common practice for calculating the response time of liquid crystals. For ease of understanding and to make the accompanying drawings neater, Figure 3 , Figure 4 And subsequent Figures 5-7 , Figures 9-11It uses a simple drawing method.

[0038] S130: Perform grayscale reduction processing on the grayscale values ​​in the first gamma voltage lookup table to obtain the first lookup table; the first lookup table is used to reflect the correspondence between the grayscale values ​​before and after the grayscale reduction processing; wherein, the difference between the sixth driving voltage and the fifth driving voltage corresponding to the sixth grayscale value obtained after the target grayscale value is reduced by the grayscale reduction processing is within a first preset range.

[0039] Specifically, the term "ACC level reduction" means that the L255 grayscale corresponds to a 12-bit value of 4096 in the ACC table. ACC level reduction means lowering the value of 4096.

[0040] For example, this embodiment proposes three reduction schemes, as follows: Option ① (Maintain original brightness): See Figure 5 , Figure 5 This diagram illustrates the liquid crystal response time of the reduction scheme ① provided in this application embodiment. The TCON (Timing Control Chip) debugging software deployed in the debugging terminal is used to perform ACC (Automatic Contrast Control) reduction, and the brightness of L255 is measured and adjusted multiple times. The brightness of the L255 was precisely adjusted back to its initial brightness. ,Right now However, the response speed is slightly worse than that of scheme ②, and after adjustment, it is necessary to check whether the intermediate grayscale is shifted due to global gain.

[0041] Option 2 (accepting partial brightness loss): See Figure 6A and Figure 6B , Figure 6A This paper shows a schematic diagram of the liquid crystal response time of the chopping scheme ② provided in an embodiment of this application. Figure 6B This diagram illustrates the liquid crystal response time of a reduction scheme ② provided in another embodiment of this application; after ACC reduction using the TCON debugging software deployed in the debugging terminal, the L255 brightness is shown. Still slightly lower than the initial brightness ,Right now However, its response speed is better than that of scheme ①.

[0042] The above two operating methods depend on the actual product. If the product has a large brightness buffer (brightness margin / brightness redundancy / brightness reserve) and a small loss of product brightness is acceptable, then option ① can be used. If the product has a small brightness buffer, then option ② should be used.

[0043] Option ③ (without considering brightness factors): Figure 7 The diagram illustrates the liquid crystal response time of the reduction scheme ③ provided in this embodiment. If brightness is not a factor to be considered for the time being, the liquid crystal response time can be reduced by ACC reduction. The response speed of this scheme is the best compared to schemes ① and ②.

[0044] For example, in the TCON debugging software deployed in the debugging terminal, find the ACC function, first determine the upper limit of grayscale for ACC reduction. For example, the 12-bit color depth digital signal corresponding to L255 is 4096, and reduce 4096 to about 4000. The upper limit of grayscale needs to be set by combining the RGB ratio with the brightness requirements.

[0045] Create a grayscale reduction curve: Set up a first lookup table from L0 to L255, so that the output voltage of these grayscale levels is reduced proportionally or by a specified value, with the aim of bringing the output voltage of L255 back to the level before the Gamma voltage was increased.

[0046] It is important to note that a pixel consists of a red sub-pixel, a green sub-pixel, and a blue sub-pixel. Therefore, the pixel reduction process involves reducing the digital signals of the red, green, and blue sub-pixels separately.

[0047] For example, Table 1 shows a portion of the first comparison table provided in the embodiments of this application: Table 1 First Comparison Table

[0048] Specifically, the difference between the sixth grayscale value obtained after the target grayscale value is clipped and the sixth driving voltage corresponding to it in the first gamma voltage lookup table, and the fifth driving voltage corresponding to the target grayscale value in the original gamma voltage lookup table, must be within a preset range (this preset range is set according to the product brightness requirements). For example, L255 is clipped to obtain L240. The sixth driving voltage corresponding to L240 in the first gamma voltage lookup table is the same as the fifth driving voltage corresponding to L255 in the original gamma voltage lookup table, or the difference between the two is within a first preset range (the size of the first preset range needs to be determined according to the allowable brightness loss).

[0049] This step (S130) can compensate for the brightness abnormality problem that may be caused by the previous voltage increase. By actively reducing the grayscale (i.e., grayscale reduction), the risk of brightness reversal is reduced without affecting or significantly affecting the display brightness.

[0050] S140: Overshoot the grayscale values ​​after the step reduction processing in the first reference table to obtain the second reference table; the second reference table is used to reflect the correspondence between the grayscale values ​​before and after the overshoot processing; wherein, the difference between the eighth driving voltage and the fourth driving voltage corresponding to the seventh grayscale value obtained after the sixth grayscale value is overshooted is within the second preset range.

[0051] See Figure 8 , Figure 8 The diagram shows the output grayscale logic block diagram of SOC OD paired with TCON OD provided in the embodiment of this application. Since the OD module of TCON is located after the TCON ACC module, the grayscale voltage output by the overshoot module is the real Gamma voltage and will not be reduced by the ACC module. This makes the grayscale voltage finally output to L255 on the panel the increased Gamma voltage, rather than the grayscale voltage reduced by the ACC module, thereby effectively improving the Gamma voltage.

[0052] Specifically, since the TCON OD module is located after the ACC module, a higher overshoot voltage is applied to high grayscale changes. This voltage is not weakened by the preceding ACC level cutoff, allowing the eighth driving voltage output by the TCON OD module to reach the fourth driving voltage corresponding to the target grayscale value in the first gamma voltage lookup table in S120 (the eighth driving voltage can be the same as the fourth driving voltage, or the difference between the two can be within a second preset range). This effectively drives the liquid crystal molecules, ultimately improving brightness and response speed.

[0053] For example, if the target grayscale value is L255, it becomes L240 after being clipped. After overshoot, it reaches the driving voltage corresponding to L255. At this point, the actual driving voltage output by the TCON OD module is the Gamma1 voltage (i.e., the maximum output voltage) in the first gamma voltage lookup table. It should be noted that the Gamma1 voltage in the first gamma voltage lookup table is greater than the Gamma1 voltage in the original gamma voltage lookup table. This results in a larger voltage applied to both ends of the liquid crystal, which can drive the liquid crystal molecules to orient more quickly and accelerate the response speed.

[0054] In the TCON debugging software deployed in the debugging terminal, find the OverDrive function setting, and then configure the overshoot value for the grayscale values ​​after the step-cutting process in the first lookup table to obtain the second lookup table.

[0055] For example, Table 2 shows a portion of the first comparison table provided in the embodiments of this application: Table 2 Second Comparison Table Gray 0 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 255 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 16 23 16 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 32 42 38 32 20 15 11 7 2 0 0 0 0 0 0 0 0 0 48 57 55 51 48 35 30 25 20 15 11 4 0 0 0 0 0 0 64 73 70 69 68 64 50 45 40 32 30 23 16 9 6 0 0 0 80 89 87 85 85 85 80 68 63 58 53 44 38 34 28 22 13 0 96 109 105 103 103 102 101 96 83 78 73 66 62 57 50 40 34 22 112 127 125 125 123 121 121 116 112 98 93 88 83 77 70 65 58 41 128 146 144 143 141 138 138 136 132 128 120 115 109 106 100 94 86 78 144 160 159 159 157 155 155 151 149 147 144 141 136 130 125 119 111 103 160 176 175 175 175 173 172 170 166 164 163 160 157 153 146 140 132 123 176 195 194 194 193 191 190 188 186 183 180 179 176 172 167 160 151 143 192 215 213 213 211 211 210 210 208 205 205 205 201 192 188 182 174 167 208 233 232 232 231 231 231 229 227 226 225 223 222 213 208 205 199 191 224 245 243 243 241 241 241 241 241 239 239 239 239 237 228 224 222 216 240 255 254 254 254 254 253 251 251 250 250 248 248 246 246 242 240 240 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 In Table 2, the rows represent the grayscale values ​​of the first frame, and the columns represent the grayscale values ​​of the second frame (the second frame is the frame following the first). The value 255 in the second-to-last row of the second column indicates that when switching from L0 to L240, the voltage overshoot is the driving voltage corresponding to L255. Table 2 shows that a higher voltage overshoot only occurs when switching from a low grayscale value to a high grayscale value. If the grayscale value of the first frame is greater than or equal to the grayscale value of the second frame, no overshoot is required.

[0056] See Figures 9-11 , Figure 9 This diagram illustrates the liquid crystal response time under the combined effect of the reduction scheme ① and overshoot processing provided in the embodiments of this application. Figure 10 This diagram illustrates the liquid crystal response time under the combined effect of the step reduction scheme ② and overshoot processing provided in the embodiments of this application. Figure 11 This is a schematic diagram illustrating the liquid crystal response time under the combined effect of the step reduction scheme ③ and overshoot processing provided in the embodiments of this application. Figures 9-11 It can be seen that response time ① > response time ⑦ > response time ⑧ > response time ⑨. Therefore, the debugging method of this embodiment: "① increase Gamma voltage + ② TCON ACC level reduction + ③ enable TCON OD overshoot function" can effectively shorten the response time of the liquid crystal when the gray level value increases, including the response time when switching from any gray level to 255 gray level.

[0057] The debugging method of this application provides a power basis for increasing the driving voltage by increasing the AVDD voltage. The refitted Gamma curve breaks through the upper limit of the traditional Gamma voltage. The grayscale reduction process reduces the risk of abnormal brightness caused by high voltage. The overshoot process ensures the effective application of high driving voltage in the subsequent driving process. Thus, the higher driving voltage can improve the orientation ability of liquid crystal molecules, thereby accelerating the response time of grayscale increase scenes, reducing image ghosting, and maintaining the stability of display brightness to a certain extent, thus achieving better display performance of the liquid crystal display device.

[0058] Example 2: Figure 12 A flowchart illustrating a driving method for a liquid crystal display device provided in an embodiment of this application is shown. The method includes: S210: Obtain the first grayscale value of the target pixel in the first frame and the second grayscale value in the second frame; wherein, the second frame is the frame following the first frame.

[0059] Specifically, the timing control chip (TCON) of the liquid crystal display device receives frame data transmitted from the front-end graphics card and extracts the first grayscale value (denoted as G1) of the target pixel in the first frame and the second grayscale value (denoted as G2) of the second frame, which is the next frame after the first frame.

[0060] S220: Perform a reduction step on the second grayscale value to obtain the third grayscale value.

[0061] Specifically, the automatic contrast control (ACC) module in the timing control chip (TCON) performs grayscale reduction processing. Referring to the preset grayscale correspondence rules, the voltage amplitude of the second grayscale value G2 is adjusted to reduce its corresponding output voltage reference, thereby obtaining the third grayscale value (denoted as G3).

[0062] For example, S220 specifically includes: S221-S222.

[0063] S221: Obtain the first lookup table, which reflects the correspondence between the grayscale values ​​before and after grayscale reduction.

[0064] S222: Based on the first lookup table, determine the third gray level value corresponding to the second gray level value after reduction.

[0065] For example, in addition to determining the third grayscale value corresponding to the second grayscale value after reduction based on the first lookup table, the third grayscale value corresponding to the second grayscale value after reduction can also be determined by a first coefficient (which is less than 1). For example, the second grayscale value G2... 0.95 = third gray level value G3.

[0066] For example, the third gray level value corresponding to the second gray level value after reduction can also be determined by a preset decreasing function, such as an inverse proportional function.

[0067] S230: If the second gray level value is greater than the first gray level value, the third gray level value is over-over-processed to obtain the fourth gray level value.

[0068] Specifically, when the timing control chip determines that G2 > G1 (i.e., the grayscale is in an increasing state), it activates its internal overdrive (OD) module to perform overshoot gain processing on the third grayscale value G3. By increasing the rate and amplitude of voltage change, the fourth grayscale value (denoted as G4) is obtained. This strengthens the orientation driving force of the liquid crystal molecules and uses the overshoot voltage to compensate for the driving margin loss caused by the grayscale reduction process, laying the foundation for subsequent matching of high driving voltage.

[0069] For example, S230 specifically includes S231-S232.

[0070] S231: Obtain the second lookup table, which reflects the correspondence between the grayscale values ​​before and after overshooting.

[0071] S232: Based on the second lookup table, determine the fourth gray level value corresponding to the third gray level value after overshooting.

[0072] For example, in addition to determining the fourth gray level value corresponding to the third gray level value after overshooting based on the second lookup table, the fourth gray level value corresponding to the third gray level value after overshooting can also be determined by the second coefficient (which is greater than 1), or by the incrementing function.

[0073] S240: The fourth grayscale value is output to the source driver chip so that the source driver chip matches the fourth grayscale value with the first gamma voltage lookup table to obtain the first driving voltage of the target pixel in the second frame; wherein, the first gamma voltage lookup table is obtained by refitting the gamma curve after increasing the original AVDD voltage; and the first driving voltage is greater than the second driving voltage corresponding to the fourth grayscale value in the original gamma voltage lookup table, which is obtained by fitting the gamma curve based on the original AVDD voltage.

[0074] Specifically, the timing control chip transmits the fourth grayscale value G4 to the source driver chip. The source driver chip then uses a preset first gamma voltage lookup table for matching and outputs the first driving voltage (denoted as V1) corresponding to the target pixel in the second frame. The first gamma voltage lookup table is obtained by increasing the original AVDD voltage, removing the reference voltage limitation of the Gamma IC, and then refitting the Gamma 2.2 curve. Its corresponding driving voltage range is larger than that of the original gamma voltage lookup table fitted based on the original AVDD voltage. Furthermore, the first driving voltage V1 is greater than the second driving voltage (denoted as V2) corresponding to the fourth grayscale value G4 in the original gamma voltage lookup table. Because the first gamma voltage lookup table breaks through the upper limit of gamma voltage in existing technologies, it provides a stronger driving voltage for scenarios with increased grayscale, thereby improving the turning speed of liquid crystal molecules.

[0075] This embodiment breaks through the reference voltage limit of the Gamma IC by increasing the original AVDD voltage, providing a higher driving voltage space for high grayscale (including L255); the grayscale reduction process can effectively solve the brightness reversal problem that may be caused by increasing the driving voltage, while the overshoot process can make the higher driving voltage act on the display panel, significantly improving the turning speed of liquid crystal molecules, thereby greatly shortening the response time of grayscale increase scenarios (including any grayscale switching to L255 scenarios), reducing screen ghosting and operation delay, and improving the display performance and user experience of the display panel.

[0076] As an optional implementation, the driving method of the liquid crystal display device further includes: S250-S270.

[0077] S250: Obtain the fifth grayscale value of the target pixel in the third frame; where the third frame is the frame following the second frame.

[0078] Specifically, the timing control chip (TCON) of the liquid crystal display device continuously receives frame data transmitted from the front-end graphics card. After obtaining the grayscale values ​​of the first frame (G1) and the second frame (G2), it continues to extract the fifth grayscale value (denoted as G5) corresponding to the next frame (the third frame) after the second frame.

[0079] S260: Reduce the gray level of the fifth gray level to obtain the sixth gray level.

[0080] Specifically, the automatic contrast control (ACC) module of the timing control chip and the preset grayscale correspondence rules perform a reduction process on the fifth grayscale value G5, lowering its output voltage reference to obtain the sixth grayscale value (denoted as G6).

[0081] It is important to note that grayscale reduction is required regardless of whether the grayscale value is increased, decreased, or remains unchanged. In other words, grayscale reduction is a global process.

[0082] S270: When the fifth gray level value is less than or equal to the second gray level value, the sixth gray level value is output to the source driver chip so that the source driver chip matches the sixth gray level value with the first gamma voltage lookup table to obtain the third driving voltage corresponding to the target pixel in the third frame; the third driving voltage is less than the first driving voltage, and the difference between the third driving voltage and the second driving voltage is within a preset range.

[0083] Specifically, when the timing control chip determines that G5 ≤ G2 (i.e., the grayscale level has not continued to increase and is in a state of maintenance or decrease), it does not activate the overdrive (OD) module of the timing control chip and can directly output the sixth grayscale value G6 to the source driver chip. The source driver chip calls the first gamma voltage lookup table for matching to obtain the third driving voltage (denoted as V3). Among them, the third driving voltage V3 is less than the first driving voltage V1 corresponding to the second frame, and the difference between V3 and the second driving voltage V2 corresponding to G6 in the original gamma voltage lookup table is within a preset range (this preset range is set based on the product brightness requirements and liquid crystal characteristics). For example, if the panel needs to maintain brightness without loss, V3 can be set to V2; if a certain brightness loss is allowed to pursue a faster liquid crystal response speed, the preset range between V3 and V2 can be set based on the product brightness requirements and liquid crystal characteristics.

[0084] In this embodiment, when the grayscale does not continue to increase, the panel brightness is kept within a controllable range by continuing the grayscale reduction process and outputting a third driving voltage with a controllable difference from the original driving voltage, so that there will be no obvious abnormality in brightness.

[0085] For example, the following is combined with Figure 8 , Figures 13-14This section explains the differences between the grayscale switching process in the existing conventional mode and the grayscale switching process in this embodiment. Figure 13 A schematic diagram of the grayscale switching process in the existing conventional mode is shown. Figure 14 A schematic diagram of the grayscale switching process provided in this embodiment is shown.

[0086] See Figure 8 , Figure 13 The grayscale switching process in normal mode is as follows: During normal use, the LCD display moves from L0 to L255 (target grayscale value). The front-end graphics card outputs the L0→L255 grayscale data to the system-on-a-chip (SOC). Taking the SOC outputting 3 frames of grayscale data to the timing control chip (TCON) as an example: L0→L255 (normal L255 grayscale data due to SOC overshoot)→L255 (target grayscale data), and finally, after passing through the TCON's ACC module... Figure 8 ③ Output to the display panel, because the TCON ACC module does not perform the grayscale reduction action at this time, that is, the final grayscale voltage output to the display panel is L0→L255 (the unincreased L255 grayscale voltage due to SOC overshoot)→L255 (target grayscale voltage).

[0087] It should be noted that although the overdrive (OD) module of the system-on-a-chip (SOC) overdrives the L255 grayscale data, the overdrive function cannot further increase the driving voltage of the display panel to enhance the orientation capability of the liquid crystal molecules because the Gamma voltage corresponding to L255 is already the highest voltage output by the Gamma IC.

[0088] See Figure 8 , Figure 14The grayscale switching process in this embodiment is as follows: During normal use, the LCD display device moves from L0 to L255 (target grayscale value). The front-end graphics card outputs the L0 to L255 grayscale data to the system-on-a-chip (SOC). Taking the SOC outputting 3 frames of grayscale data to the timing control chip (TCON) as an example: L0 → L255 (normal L255 grayscale data after SOC overshoot) → L255 (target grayscale data). Because ACC clipping is a global application, after passing through the TCON's ACC module, the output to the TCON's OD module is: L0 → L240 (grayscale data after TCON ACC clipping) → L240 (grayscale data after TCON ACC clipping). Because increasing the Gamma voltage is a global application, after passing through the TCON OD module, the grayscale switching process from the first frame to the second frame [L0→L240 (grayscale data after TCON ACC grading)] will overshoot one frame L255 (grayscale data after increasing Gamma) according to the second lookup table, i.e., outputting L0→L255 (grayscale data of L255 after increasing Gamma). The grayscale switching process from the second frame to the third frame [L240 (grayscale data after TCON ACC grading) → L240 (grayscale data after TCON ACC grading)] does not involve grayscale change and therefore does not undergo overshooting. Therefore, the final grayscale voltage output to the display panel is: L0→L255 (driving voltage corresponding to L255 after increasing Gamma)→L240 (driving voltage corresponding to L240 after TCON ACC grading).

[0089] It is important to note that Figure 13 and Figure 14 The response time shown is calculated using the industry standard for statistically analyzing LCD response times.

[0090] Example 3: This application provides a liquid crystal display device, including a timing control chip and a source driver chip, wherein the timing control chip includes an automatic contrast control module and a first overshoot module.

[0091] Specifically, the liquid crystal display device also presets a first gamma voltage reference table based on the refitted Gamma2.2 curve of the increased AVDD voltage.

[0092] The timing control chip is configured to: acquire the first grayscale value corresponding to the first frame of the target pixel and the second grayscale value corresponding to the second frame; wherein the second frame is the frame following the first frame.

[0093] The automatic contrast control module is configured to perform a reduction process on the second grayscale value to obtain the third grayscale value.

[0094] Specifically, the automatic contrast control module is configured as follows: Obtain the first lookup table, which reflects the correspondence between the grayscale values ​​before and after grayscale reduction; based on the first lookup table, determine the third grayscale value corresponding to the second grayscale value after grayscale reduction.

[0095] The first overshoot module is configured to: when the second grayscale value is greater than the first grayscale value, overshoot the third grayscale value to obtain the fourth grayscale value.

[0096] Specifically, the first overshoot module is configured as follows: Obtain the second lookup table, which reflects the correspondence between the grayscale values ​​before and after overshooting; based on the second lookup table, determine the fourth grayscale value corresponding to the third grayscale value after overshooting.

[0097] The timing control chip is also configured to: output the fourth grayscale value to the source driver chip, so that the source driver chip matches the fourth grayscale value with the first gamma voltage lookup table to obtain the first driving voltage of the target pixel in the second frame; wherein, the first gamma voltage lookup table is obtained by refitting the gamma curve after increasing the original AVDD voltage; and the first driving voltage is greater than the second driving voltage corresponding to the fourth grayscale value in the original gamma voltage lookup table, which is obtained by fitting the gamma curve based on the original AVDD voltage.

[0098] This embodiment breaks through the reference voltage limit of the Gamma IC by increasing the original AVDD voltage, providing a higher driving voltage space for high grayscale (including L255); the grayscale reduction process can effectively solve the brightness reversal problem that may be caused by increasing the driving voltage, while the overshoot process can make the higher driving voltage act on the display panel, significantly improving the turning speed of liquid crystal molecules, thereby greatly shortening the response time of grayscale increase scenarios (including any grayscale switching to L255 scenarios), reducing screen ghosting and operation delay, and improving the display performance and user experience of the display panel.

[0099] As an optional implementation, the timing control chip is further configured to: acquire the fifth grayscale value of the target pixel in the third frame; wherein the third frame is the frame following the second frame; The automatic contrast control module is also configured to: perform a reduction step on the fifth gray level value to obtain the sixth gray level value; The timing control chip is also configured to: when the fifth gray level value is less than or equal to the second gray level value, output the sixth gray level value to the source driver chip, so that the source driver chip matches the sixth gray level value with the first gamma voltage lookup table to obtain the third driving voltage corresponding to the target pixel in the third frame; the third driving voltage is less than the first driving voltage, and the difference between the third driving voltage and the second driving voltage is within a preset range.

[0100] In this embodiment, when the grayscale does not continue to increase, the panel brightness is kept within a controllable range by continuing the grayscale reduction process and outputting a third driving voltage with a controllable difference from the original driving voltage, so that there will be no obvious abnormality in brightness.

[0101] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0102] Corresponding to the driving method of the liquid crystal display device described in the above embodiments, Figure 15 A structural block diagram of the driving device of the liquid crystal display device provided in the embodiments of this application is shown. For ease of explanation, only the parts related to the embodiments of this application are shown.

[0103] Reference Figure 15 The device includes: The acquisition module 310 is used to acquire the first grayscale value corresponding to the first frame of the target pixel and the second grayscale value corresponding to the second frame; wherein the second frame is the frame following the first frame.

[0104] The grayscale reduction module 320 is used to reduce the grayscale value of the second grayscale value to obtain the third grayscale value.

[0105] The overshoot module 330 is used to overshoot the third gray level value to obtain the fourth gray level value when the second gray level value is greater than the first gray level value.

[0106] The output module 340 is used to output the fourth grayscale value to the source driver chip, so that the source driver chip matches the fourth grayscale value with the first gamma voltage lookup table to obtain the first driving voltage of the target pixel in the second frame; wherein, the first gamma voltage lookup table is obtained by refitting the gamma curve after increasing the original AVDD voltage; and the first driving voltage is greater than the second driving voltage corresponding to the fourth grayscale value in the original gamma voltage lookup table, which is obtained by fitting the gamma curve based on the original AVDD voltage.

[0107] It should be noted that the information interaction and execution process between the above-mentioned devices / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.

[0108] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0109] Example 4: This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps described in the various method embodiments above.

[0110] Example 5: This application provides a computer program product that, when run on an electronic device, enables the electronic device to perform the steps described in the various method embodiments above.

[0111] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of this application can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include at least: any entity or device capable of carrying computer program code to an electronic device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. Examples include USB flash drives, portable hard drives, magnetic disks, or optical disks. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electrical carrier signals or telecommunication signals.

[0112] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0113] Computer program code for performing the operations of the embodiments of this application can be written in one or more programming languages ​​or a combination thereof. These programming languages ​​include object-oriented programming languages ​​such as Python, Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0114] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0115] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0116] In the embodiments provided in this application, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. For example, the device / electronic device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings or direct couplings or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0117] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0118] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions 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 this application, and should all be included within the protection scope of this application.

Claims

1. A driving method for a liquid crystal display device, characterized in that, include: Obtain the first grayscale value of the target pixel in the first frame and the second grayscale value in the second frame; wherein the second frame is the frame following the first frame; The second grayscale value is reduced to obtain the third grayscale value; If the second grayscale value is greater than the first grayscale value, the third grayscale value is over-over-processed to obtain the fourth grayscale value; The fourth grayscale value is output to the source driver chip, so that the source driver chip matches the fourth grayscale value with the first gamma voltage lookup table to obtain the first driving voltage corresponding to the target pixel in the second frame; wherein, the first gamma voltage lookup table is obtained by refitting the gamma curve after increasing the original AVDD voltage; and the first driving voltage is greater than the second driving voltage corresponding to the fourth grayscale value in the original gamma voltage lookup table, which is obtained by fitting the gamma curve based on the original AVDD voltage.

2. The driving method for a liquid crystal display device as described in claim 1, characterized in that, The method further includes: Obtain the fifth grayscale value of the target pixel in the third frame; wherein, the third frame is the frame following the second frame; The fifth grayscale value is subjected to the aforementioned grayscale reduction process to obtain the sixth grayscale value; If the fifth grayscale value is less than or equal to the second grayscale value, the sixth grayscale value is output to the source driver chip so that the source driver chip matches the sixth grayscale value with the first gamma voltage lookup table to obtain the third driving voltage corresponding to the target pixel in the third frame; the third driving voltage is less than the first driving voltage, and the difference between the third driving voltage and the second driving voltage is within a preset range.

3. The driving method for a liquid crystal display device as described in claim 1, characterized in that, The step of reducing the grayscale value of the second grayscale value to obtain the third grayscale value includes: Obtain a first lookup table, which is used to reflect the correspondence between the grayscale values ​​before and after the grayscale reduction. Based on the first lookup table, determine the third grayscale value corresponding to the second grayscale value after reduction.

4. The driving method for a liquid crystal display device as described in claim 1, characterized in that, The process of overshooting the third grayscale value to obtain the fourth grayscale value includes: Obtain a second lookup table, which is used to reflect the correspondence between the grayscale values ​​before the overshooting process and the grayscale values ​​after the overshooting process; Based on the second lookup table, determine the fourth grayscale value corresponding to the third grayscale value after the overshooting process.

5. A liquid crystal display device, characterized in that, include: The timing control chip and the source driver chip, wherein the timing control chip includes an automatic contrast control module and a first overshoot module; The timing control chip is configured to: acquire a first grayscale value corresponding to a first frame of a target pixel and a second grayscale value corresponding to a second frame; wherein the second frame is the frame following the first frame; The automatic contrast control module is configured to: perform a reduction process on the second grayscale value to obtain a third grayscale value; The first overshoot module is configured to: when the second grayscale value is greater than the first grayscale value, perform overshoot processing on the third grayscale value to obtain a fourth grayscale value; The timing control chip is further configured to: output the fourth grayscale value to the source driver chip, so that the source driver chip matches the fourth grayscale value with a first gamma voltage lookup table to obtain the first driving voltage corresponding to the target pixel in the second frame; wherein, the first gamma voltage lookup table is obtained by refitting the gamma curve after increasing the original AVDD voltage; and, the first driving voltage is greater than the second driving voltage corresponding to the fourth grayscale value in the original gamma voltage lookup table, the original gamma voltage lookup table being obtained by fitting the gamma curve based on the original AVDD voltage.

6. The liquid crystal display device as claimed in claim 5, characterized in that, The timing control chip is further configured to: acquire the fifth grayscale value of the target pixel in the third frame; wherein the third frame is the frame following the second frame; The automatic contrast control module is also configured to perform the level reduction process on the fifth grayscale value to obtain a sixth grayscale value; The timing control chip is further configured to: when the fifth grayscale value is less than or equal to the second grayscale value, output the sixth grayscale value to the source driver chip, so that the source driver chip matches the sixth grayscale value with the first gamma voltage lookup table to obtain the third driving voltage corresponding to the target pixel in the third frame; the third driving voltage is less than the first driving voltage, and the difference between the third driving voltage and the second driving voltage is within a preset range.

7. The liquid crystal display device as claimed in claim 5, characterized in that, The automatic contrast control module is specifically configured as follows: Obtain a first lookup table, which is used to reflect the correspondence between the grayscale values ​​before and after the grayscale reduction. Based on the first lookup table, determine the third grayscale value corresponding to the second grayscale value after reduction.

8. The liquid crystal display device as claimed in claim 5, characterized in that, The first overshoot module is specifically configured as follows: Obtain a second lookup table, which is used to reflect the correspondence between the grayscale values ​​before the overshooting process and the grayscale values ​​after the overshooting process; Based on the second lookup table, determine the fourth grayscale value corresponding to the third grayscale value after the overshooting process.

9. A debugging method for a liquid crystal display device, characterized in that, Applied to a debugging terminal, the method includes: Increase the original AVDD voltage to obtain the first AVDD voltage; Based on the first AVDD voltage, the gamma curve is refitted to obtain a first gamma voltage reference table; wherein, the fourth driving voltage corresponding to the target gray level value in the first gamma voltage reference table is greater than the fifth driving voltage corresponding to the target gray level value in the original gamma voltage reference table, and the original gamma voltage reference table is obtained by fitting the gamma curve based on the original AVDD voltage; the target gray level value is any gray level value other than 0 gray level. The grayscale values ​​in the first gamma voltage lookup table are reduced in size to obtain a first lookup table. The first lookup table is used to reflect the correspondence between the grayscale values ​​before and after the reduction in size. The difference between the sixth driving voltage and the fifth driving voltage corresponding to the sixth grayscale value obtained after the reduction in size of the target grayscale value is within a first preset range. The grayscale values ​​after the step reduction processing in the first lookup table are over-overshot to obtain a second lookup table; the second lookup table is used to reflect the correspondence between the grayscale values ​​before the over-overshot processing and the grayscale values ​​after the over-overshot processing; wherein, the difference between the eighth driving voltage and the fourth driving voltage corresponding to the seventh grayscale value obtained after the over-overshot processing of the sixth grayscale value is within a second preset range in the first gamma voltage lookup table.

10. A computer program product, characterized in that, When the computer program product is run on the liquid crystal display device, it causes the liquid crystal display device to perform the method as described in any one of claims 1-4.

Images