Display device and display method

Abstract

The invention provides a display device and a display method. The display device comprises a display panel and a driving chip, the driving chip comprises a voltage regulating unit, an overvoltage driving unit and a triggering unit; the trigger unit is used for detecting whether the current display picture of the display panel is a heavy-load picture or not, and when the display picture is the heavy-load picture, the trigger voltage regulation unit and the overvoltage driving unit are triggered to work cooperatively; the voltage adjusting unit is used for adjusting a target driving voltage corresponding to a target gray scale in the liquid crystal driving voltmeter, so that the lighting effect reaches the preset brightness when the display panel displays a white picture; the overvoltage driving unit is used for starting a driving function, adjusting the parameter configuration table and performing overvoltage driving on a data line of the display panel based on the parameter configuration table and the target driving voltage so as to improve the charging rate of the heavy-load picture, so that the charging rate is improved by detecting the heavy-load picture and cooperatively adjusting the voltage and overvoltage driving, and the charging efficiency is improved. The method has the advantages of improving the charging rate of a heavy-load picture, eliminating display defects and improving the display quality.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display device and display method. Background Technology

[0002] In practical applications of high-specification display panels, such as 4K / 8K ultra-high-definition resolution, high refresh rates, irregularly shaped structures, or large-size panels, the display process of heavy-load scenes faces a bottleneck in charging performance. Heavy-load scenes specifically refer to scenarios where the data line voltage needs to switch frequently between extreme grayscale values, typically in horizontal stripe patterns, where adjacent rows of pixels alternate between 0 grayscale and 255 grayscale, causing the data line voltage to oscillate violently between its lowest and highest values. This rapid back-and-forth switching significantly increases the output power demand of the source driver chip, thereby limiting the rate of voltage rise and fall, preventing the data line from fully charging to the target level within a limited row cycle. Insufficient charging directly results in the lowest charging rate among all display modes under heavy-load scenes, easily causing visual defects such as COF dark bands and color deviations, severely affecting display quality. Although theoretically, optimizing the panel's internal circuitry can improve charging efficiency, the adjustment space for such methods is extremely limited under the physical constraints of high resolution, high refresh rates, and specially shaped panels, resulting in minimal practical effect. In addition, while existing programmable pixel compensation circuit solutions can adjust the driving timing to alleviate signal delay, their preset parameters often do not match the panel characteristics, resulting in unstable improvement effects. Furthermore, dedicated driver chips are expensive, increasing the manufacturing burden and making it difficult to meet economic requirements. Summary of the Invention

[0003] This application provides a display device and display method, which have the advantages of effectively improving the charging rate of heavy-load screens, eliminating display defects, and improving display quality.

[0004] In a first aspect, the display device provided in the embodiments of this application includes a display panel and a driving chip; the driving chip includes a voltage regulation unit, an overvoltage driving unit, and a trigger unit; wherein... The triggering unit is used to detect whether the current display screen of the display panel is a heavy load screen. When the display screen is the heavy load screen, the voltage regulation unit and the overvoltage drive unit are triggered to work together. The voltage adjustment unit is used to adjust the target driving voltage corresponding to the target gray level in the liquid crystal driving voltage meter so that the light effect of the display panel when displaying a white screen reaches the preset brightness. The overvoltage driving unit is used to enable the driving function and adjust the parameter configuration table. Based on the parameter configuration table and the target driving voltage, it performs overvoltage driving on the data lines of the display panel to improve the charging rate of the heavy-load screen. The driving voltage for overvoltage driving the data lines is greater than or equal to the target driving voltage.

[0005] Secondly, the display method provided in the embodiments of this application is applied to a display device, and the method includes: The trigger unit detects whether the current display screen on the display panel is a heavy load screen. When the display screen is the heavy load screen, the trigger voltage regulation unit and the overvoltage drive unit work together. The voltage adjustment unit adjusts the target driving voltage corresponding to the target grayscale in the liquid crystal driving voltage table so that the light effect of the display panel when displaying a white screen reaches the preset brightness. The overvoltage driving unit enables the driving function and adjusts the parameter configuration table. Based on the parameter configuration table and the target driving voltage, the data lines of the display panel are overvoltage driven to improve the charging rate of the heavy-load screen. The driving voltage for overvoltage driving the data lines is greater than or equal to the target driving voltage.

[0006] In summary, the display device and display method provided in this application include a display panel and a driver chip. The driver chip includes a voltage adjustment unit, an overvoltage driving unit, and a trigger unit. The trigger unit is used to detect whether the current display screen on the display panel is a heavy-load screen. When the display screen is a heavy-load screen, the voltage adjustment unit and the overvoltage driving unit are triggered to work together. The voltage adjustment unit is used to adjust the target driving voltage corresponding to the target grayscale in the liquid crystal driving voltage table so that the light effect of the display panel when displaying a white screen reaches the preset brightness. The overvoltage driving unit is used to enable the driving function and adjust the parameter configuration table. Based on the parameter configuration table and the target driving voltage, the data lines of the display panel are over-driven to improve the charging rate of the heavy-load screen. Thus, by detecting the heavy-load screen and coordinating the adjustment of voltage and overvoltage driving, the charging rate is improved, which has the advantages of improving the charging rate of the heavy-load screen, eliminating display defects, and improving display quality. Attached Figure Description

[0007] The present invention will be further described below with reference to the accompanying drawings. It should be noted that the accompanying drawings described below are merely for illustrating some embodiments of the present invention. Those skilled in the art can obtain other drawings based on the above drawings without any creative effort.

[0008] Figure 1 A schematic diagram of a display device provided for an embodiment of this application.

[0009] Figure 2 This is a schematic diagram of the theoretical charging waveform and the actual charging waveform in the embodiments of this application.

[0010] Figure 3 This is a schematic diagram showing the driving voltage before and after the change in the embodiments of this application.

[0011] Figure 4 This is a schematic diagram illustrating the range of increased charging rate in an embodiment of this application. Detailed Implementation

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0013] In this invention, the terms "first," "second," etc., are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, display device, product, or apparatus that includes a series of steps or modules is not limited to the listed steps or modules, but may optionally include steps or modules not listed, or may optionally include other steps or modules inherent to the aforementioned process, method, product, or apparatus.

[0014] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily imply that all embodiments are the same, nor are they independent or alternative embodiments mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0015] This application provides a display device, which includes, but is not limited to, the following embodiments and combinations thereof.

[0016] In one embodiment, Figure 1 A schematic diagram of a display device provided for an embodiment of this application, as shown below. Figure 1 As shown, the display device 100 includes a display panel 101 and a driver chip 102; the driver chip 102 includes a trigger unit 1021, an overvoltage driving unit 1022 and a voltage regulation unit 1023.

[0017] The trigger unit 1021 is used to detect whether the current display screen of the display panel 101 is an overloaded screen. When the display screen is an overloaded screen, the trigger voltage regulation unit and the overvoltage drive unit work together.

[0018] The voltage adjustment unit 1023 is used to adjust the target driving voltage corresponding to the target gray level in the liquid crystal driving voltage meter so that the light effect of the display panel 101 when displaying a white screen reaches the preset brightness.

[0019] The overvoltage drive unit 1022 is used to enable the drive function and adjust the parameter configuration table. Based on the parameter configuration table and the target drive voltage, it performs overvoltage drive on the data lines of the display panel 101 to improve the charging rate of heavy-load screens. The drive voltage for overvoltage drive of the data lines is greater than or equal to the target drive voltage. As an example, the trigger unit 1021 can determine the screen content by analyzing the frame data of the input video stream, or by receiving an external signal indicating the current screen type. When a heavy-load screen is detected, the trigger signal causes the voltage regulation unit 1023 and the overvoltage drive unit to start working together. In one implementation, the trigger unit 1021 can be configured to periodically sample and analyze the screen data to update the screen type determination result in real time. A heavy-load screen can be a screen where, in a specific display mode, such as a horizontal stripe display mode, the voltage on the data line needs to fluctuate frequently and significantly between the lowest and highest gray levels, leading to charging difficulties.

[0020] The voltage adjustment unit 1023 is used to adjust the target driving voltage corresponding to the target grayscale in the liquid crystal driving voltage meter. For example, the voltage adjustment unit 1023 can receive a brightness calibration command from an external source or automatically adjust according to a preset brightness curve. By adjusting the driving voltage of the target grayscale, the display panel 101 can achieve a preset brightness level when displaying a white image. As one implementation, the voltage adjustment unit 1023 can include a programmable digital-to-analog converter (DAC), whose output voltage value can be adjusted according to a control signal. The liquid crystal driving voltage meter can be a data structure that stores standard driving voltage values ​​corresponding to different grayscales of the display panel 101, used to drive the pixels of the display panel 101 to display an image of a specific grayscale. The target grayscale can be a specific grayscale selected in the liquid crystal driving voltage meter for voltage adjustment operation. The target driving voltage can be a driving voltage value corresponding to the target grayscale, adjusted to achieve a specific display effect.

[0021] The overvoltage driving unit 1022 is used to enable the driving function and adjust the parameter configuration table. For example, the overvoltage driving unit 1022 can be configured to load a preset parameter configuration table after receiving a trigger signal. The parameter configuration table can store voltage values ​​or timing parameters used for overvoltage driving. Based on the parameter configuration table and the target driving voltage, the overvoltage driving unit 1022 performs overvoltage driving on the data lines of the display panel 101. Specifically, the overvoltage driving unit 1022 applies a driving voltage higher than or equal to the target driving voltage to the data lines, thereby accelerating the charging process of the pixels and improving the charging rate of heavy-load images. As one implementation, the overvoltage driving unit 1022 can include a high-voltage driving circuit, and the output voltage and driving timing can be dynamically adjusted according to the parameter configuration table. The parameter configuration table can be a data structure used to store various parameters required for the overvoltage driving unit 1022 to perform overvoltage driving operations, such as overvoltage values ​​and timing. Overvoltage driving can apply a voltage higher than the standard driving voltage to the data lines of the display panel 101 to accelerate the charging process of the pixels and improve charging efficiency. The charging rate refers to the extent to which the pixels of the display panel 101 can be charged to the target voltage within a unit of time. The level of charging rate directly affects the quality and stability of the displayed image.

[0022] In summary, this application effectively solves the problem of low charging rate in high-specification panels when displaying heavy-load scenes. By intelligently identifying heavy-load scenes through the trigger unit 1021 and coordinating with the voltage adjustment unit 1023 and the overvoltage drive unit 1022, the driving voltage is adjusted and overvoltage drive is applied to the data lines, thereby improving the charging rate under heavy-load scenes. This effectively avoids display anomalies such as COF dark bands and color shifts caused by insufficient charging, ensuring the image quality and stability of high-specification panels in complex display scenarios.

[0023] In some embodiments of this application, there are various types of overloaded screens. If certain specific types of overloaded screens are not identified and processed in a targeted manner, the display panel 101 may experience problems such as insufficient charging, screen flickering, or uneven brightness in extreme scenarios.

[0024] Based on this, in one embodiment, the overloaded screen includes a horizontal stripe screen, which is composed of alternating rows of 0 grayscale and 255 grayscale, and the voltage on the data line of the display panel 101 jumps back and forth between the voltage values ​​corresponding to the 0~255 grayscale.

[0025] Specifically, a heavy-load screen refers to a screen where the display panel 101 displays specific image content, requiring high driving capabilities due to the need for rapid charging of pixels or frequent and significant changes in data line voltage. Without special processing, this screen may exhibit display defects such as insufficient charging, uneven brightness, and flickering. Horizontal stripe screens are a typical example of a heavy-load screen, characterized by significant grayscale differences between adjacent rows of pixels. For instance, this horizontal stripe screen might consist of alternating rows of 0 grayscale and 255 grayscale pixels. Each row of pixels on the display panel 101 needs to rapidly switch from an extremely low voltage (0 grayscale) to an extremely high voltage (255 grayscale), or vice versa. These rapid and significant voltage jumps pose a severe challenge to the charging capabilities of the data lines. When the display panel 101 displays a horizontal stripe screen with alternating rows of 0 grayscale and 255 grayscale pixels, the voltage on the data lines needs to rapidly and periodically switch between the lowest voltage value representing 0 grayscale and the highest voltage value representing 255 grayscale in order to accurately drive the pixels. Significant voltage fluctuations require the data cable to have extremely strong charging capabilities to ensure that each pixel is fully charged to the target grayscale voltage within a very short line scan time; otherwise, inaccurate image display or ghosting will occur. The alternation of 0 and 255 grayscale lines can be determined based on the actual situation and is not limited here. For example, alternations of 0, 255, 0, 255, 0, 0, 255, 255, or other combinations are also possible.

[0026] When the displayed image is a horizontal striped image, the voltage on the data line repeatedly jumps between the voltage values ​​corresponding to the 0~255 grayscale levels. This allows the system to identify specific display scenarios with extremely high charging rate requirements. The driver chip 102 can then specifically trigger the voltage regulation unit 1023 and the overvoltage drive unit to work together, ensuring that even in extreme cases where the data line voltage needs to fluctuate frequently and significantly, the charging rate of the display panel 101 can still be effectively improved. This addresses issues such as insufficient charging, screen flickering, or uneven brightness that may occur when displaying high-contrast, rapidly changing images, thereby ensuring the clarity and stability of the displayed image and enhancing the user's visual experience.

[0027] In some embodiments of this application, how to determine and adjust the driving voltage of a specific grayscale (e.g., a high grayscale close to a white screen) to ensure that the expected light effect level can be achieved when displaying a white screen, while also taking into account the driving requirements of heavy-duty screens, is a technical problem that urgently needs to be solved.

[0028] Based on this, in one embodiment, the target grayscale includes grayscale 223; the grayscale corresponding to the white screen is grayscale 255; the voltage adjustment unit 1023 is also used to adjust the target driving voltage corresponding to grayscale 223 so that the light effect level of the display panel 101 when displaying a white screen with grayscale 255 reaches the preset light effect level.

[0029] Specifically, the target grayscale can be a specific grayscale level used for voltage adjustment in a liquid crystal driving voltage meter. Choosing grayscale 223 as the target grayscale is based on a comprehensive consideration of the characteristics of the display panel 101 and the laws of human visual perception. In some display devices, adjusting the driving voltage corresponding to grayscale 223 can ensure the linearity and visual effect of the entire grayscale range, especially when approaching the highest grayscale (such as grayscale 255), where even small voltage deviations can lead to differences in luminous efficacy. Furthermore, grayscale 223 may also be selected as a representative grayscale; adjusting it can indirectly optimize the display effect of other adjacent grayscale levels. A white screen typically refers to the brightest image that the display panel 101 can display, corresponding to grayscale level 255. In digital display devices, grayscale values ​​are typically encoded from 0 (black) to 255 (white), with grayscale 255 representing the state where a pixel is fully conductive or has reached maximum brightness output. Ensuring that a white screen at grayscale 255 can achieve the preset luminous efficacy level is an important indicator for measuring the overall brightness and color performance of the display panel 101. The voltage adjustment unit 1023 affects the luminous efficacy level of the display panel 101 when displaying a 255-grayscale white image by adjusting the target driving voltage corresponding to the 223 grayscale level. For example, there is a certain correlation or mapping relationship between the driving voltage of the 223 grayscale level and the driving voltage of the 255 grayscale level. By adjusting the driving voltage of the 223 grayscale level, the entire grayscale curve can be calibrated, so that when the display panel 101 drives the 255 grayscale level, the luminous efficacy output can reach the preset luminous efficacy level. The preset luminous efficacy level can be a brightness or colorimetric target value set according to user needs, ambient light conditions, or industry standards. It can be implemented by fine-tuning the driving voltage of the 223 grayscale level through methods such as lookup table adjustment, gamma curve correction, or real-time feedback control until the luminous efficacy of the 255-grayscale white image meets the requirements.

[0030] This application uses grayscale 223 as the target grayscale and adjusts its corresponding target driving voltage by voltage adjustment unit 1023, enabling display panel 101 to achieve a preset light effect level when displaying a 255 grayscale white image. This overcomes the problem that relying solely on general adjustment may lead to inaccurate white image light effect. Specifically, by optimizing the driving voltage of grayscale 223, the gamma curve of high grayscale areas can be effectively calibrated, ensuring a smooth transition from grayscale 223 to 255 grayscale and accurate brightness output, thereby improving the visual consistency and user experience of display panel 101 when displaying high-brightness images.

[0031] In some embodiments of this application, if the overvoltage driving unit 1022 continues to work when the display screen switches from a heavy-load screen to a non-heavy-load screen, it may cause unnecessary power consumption increase, or even affect the display effect or device life.

[0032] Based on this, in one embodiment, the triggering unit 1021 is also used to control the overvoltage driving unit 1022 to stop working when it detects that the displayed screen is not a heavy load screen.

[0033] Specifically, when the trigger unit detects that the current display screen no longer conforms to the preset heavy-load screen characteristics—for example, it is no longer a horizontal stripe screen, or the screen content has become static, low-contrast, or other non-heavy-load modes—the trigger unit 1021 will generate a corresponding control signal. This detection process can be achieved by analyzing the input data stream of the display panel 101, the frame buffer content, or a specific screen mode recognition algorithm. Once the display screen is detected to be non-heavy-load, the trigger unit 1021 will send a command to the overvoltage drive unit 1022 to stop its operation.

[0034] When the display screen switches from a heavy-load screen to a non-heavy-load screen, the trigger unit 1021 can promptly identify and control the overvoltage drive unit 1022 to stop working. This avoids unnecessary overvoltage driving under non-heavy-load screen conditions, thereby reducing the overall power consumption of the display device and extending the service life of the drive chip 102 and the display panel 101. At the same time, by promptly shutting down the overvoltage drive function, the normal display effect of the screen in normal display mode is also ensured, avoiding screen distortion or discomfort that may be caused by over-driving, thus realizing intelligent and energy-saving operation of the display device.

[0035] In some embodiments of this application, if the overvoltage driving unit 1022 stops working immediately when the display screen switches from a heavy screen to a non-heavy screen, transient visual instability may occur during the screen switching, such as screen flickering, sudden brightness changes, or ghosting, thereby affecting the user's viewing experience.

[0036] Based on this, in one embodiment, the driver chip 102 further includes a control unit connected to the trigger unit 1021, which is used to control the overvoltage drive unit 1022 to work in a gradually deactivated state within a preset frame period when the display screen is detected to switch from a heavy load screen to a non-heavy load screen, and gradually reduce the overvoltage drive intensity of the overvoltage drive unit 1022 by a preset step size until the overvoltage drive unit 1022 is completely turned off, wherein the overvoltage drive intensity is adjusted by the overvoltage value in the parameter configuration table.

[0037] The control unit is a logic module inside the driver chip 102. Its main function is to receive the detection results from the trigger unit 1021 and control the overvoltage drive unit 1022 according to the switching state of the display screen. The control unit can execute a preset control strategy by receiving the screen type switching signal output by the trigger unit 1021 to ensure a smooth transition of the overvoltage drive unit 1022 during screen switching and avoid sudden changes.

[0038] The preset frame rate period can be the duration, measured in frames, during which the overvoltage drive unit 1022 gradually reduces its intensity from full power to shutdown when the displayed screen switches from a heavy-load screen to a non-heavy-load screen. This period can be implemented using a counter or timer, starting the count after detecting a screen switch and completing the deactivation process when the preset frame rate is reached. This period can be optimized based on the response characteristics of the display panel 101, the processing power of the drive chip 102, and visual effect requirements to provide a buffer time for a smooth transition in overvoltage drive intensity.

[0039] The gradual deactivation state can be a working mode in which the overvoltage drive unit 1022 does not immediately stop working, but its overvoltage drive intensity gradually weakens within a preset frame period. In this state, the control unit will periodically send instructions to the overvoltage drive unit 1022 to reduce the overvoltage drive intensity once in each frame period or every few frame periods, thereby avoiding sudden interruption of overvoltage drive and reducing the visual impact during screen switching.

[0040] The preset step size can be a specific value or percentage for each reduction in overvoltage drive strength during the gradual deactivation state. This step size can be a fixed voltage value, a percentage, or a step size dynamically calculated based on a preset frame period and the initial overvoltage strength. For example, if a total reduction of X units of overvoltage strength is required, and this is to be completed within N frames, then the reduction is X / N units per frame. The preset step size determines the smoothness and speed of the overvoltage drive strength reduction.

[0041] Gradually reducing the overvoltage drive intensity of the overvoltage drive unit 1022 allows the drive voltage or current output by the overvoltage drive unit 1022 to gradually decrease during the deactivation phase. The control unit can modify the overvoltage value in the parameter configuration table or directly send a control signal to the overvoltage drive unit 1022 to gradually reduce the output of its internal voltage generation circuit or current drive circuit, thus achieving a smooth transition.

[0042] Until the overvoltage drive unit 1022 is completely turned off, the control unit can send a shutdown command when the overvoltage drive intensity drops to zero or a preset minimum threshold, so that the overvoltage drive unit 1022 enters a standby or non-working state, no longer performing additional overvoltage drive on the data line, thereby saving power consumption and ensuring that unnecessary overvoltage drive is not performed under non-heavy load screen conditions.

[0043] The overvoltage drive strength is adjusted by the overvoltage value in the parameter configuration table, thus defining how the overvoltage drive strength is adjusted. The parameter configuration table can be a register set or non-volatile memory stored inside the driver chip 102. The control unit writes different overvoltage values ​​into this table, and the overvoltage drive unit 1022 reads the overvoltage values ​​to adjust its output. For example, the overvoltage value can represent a compensation voltage superimposed on the target drive voltage, thereby providing a flexible and programmable way to control the overvoltage drive strength.

[0044] This application introduces a control unit so that when the displayed screen switches from a heavy-load screen to a non-heavy-load screen, the overvoltage drive unit 1022 does not immediately stop working, but operates in a gradually deactivated state within a preset frame period. The control unit gradually reduces the overvoltage drive intensity in preset steps until the overvoltage drive unit 1022 is completely turned off, effectively avoiding visual instability problems such as screen flickering, ghosting, or brightness changes that may be caused by a sudden interruption of the overvoltage drive function, thereby improving the smoothness of screen switching and the user viewing experience. At the same time, fine adjustment of the overvoltage value in the parameter configuration table ensures that the overvoltage drive intensity can be controlled according to actual needs, optimizing the display effect and helping to extend the service life of the display panel 101.

[0045] In some embodiments of this application, the displayed screen may quickly switch back to the reloaded screen while the overvoltage driving unit 1022 is in a gradual deactivation state or immediately after being turned off. If the overvoltage driving unit 1022 needs to go through the complete activation process again, it may cause a response delay, thereby affecting the display quality of the reloaded screen, such as insufficient charging or screen flickering.

[0046] Based on this, in one embodiment, the control unit is also configured to configure an activation window. When the triggering unit 1021 re-detects the overloaded screen, it controls the overvoltage driving unit 1022 to activate to the full-power overvoltage driving state within the activation window. The full-power overvoltage driving state corresponds to the maximum overvoltage value driving mode preset in the liquid crystal driving voltage table. The activation window is a preset time interval during the gradual deactivation state of the overvoltage driving unit 1022 or after it is completely turned off.

[0047] Specifically, the control unit is configured with an activation window, which allows the control unit to define a specific time period or state interval based on the operating status of the display device or a preset strategy. Within this interval, the display device employs a special rapid response mechanism to the reappearance of a reloaded screen. The activation window can be a fixed time length, such as several frame cycles after the overvoltage drive unit 1022 is completely turned off, or it can be a state synchronized with the gradual deactivation process of the overvoltage drive unit 1022. The purpose of configuring the activation window is to optimize the response speed and efficiency of the overvoltage drive unit 1022. The trigger unit 1021 continuously monitors the display content of the display panel 101. When it re-identifies display content that matches the characteristics of a reloaded screen, it immediately sends a corresponding signal, thus ensuring that the display device can promptly perceive changes in display requirements, providing a basis for subsequent rapid response. When the trigger unit 1021 re-detects a reloaded screen, and the current display device is within the activation window, the control unit instructs the overvoltage drive unit 1022 to skip the conventional startup or gradual activation process and directly enter the full-power overvoltage drive state. The full-power overvoltage drive state allows the overvoltage drive unit 1022 to operate in a mode with the maximum overvoltage value preset in the liquid crystal drive voltage table, providing the maximum overvoltage drive intensity to ensure that heavy-load scenes receive the most complete and fastest charging. The direct activation method shortens the response time. The activation window definition covers two main scenarios. The first is a gradual deactivation process where the overvoltage drive unit 1022 is gradually reducing its drive intensity from the full-power state. During this period, although the drive intensity is decreasing, its core functions remain in a semi-activated state and can be quickly restored. The second is when the overvoltage drive unit 1022 has been completely shut down, but the display device remains vigilant for a preset time interval after shutdown, assuming a high probability of heavy-load scenes reappearing. The preset time interval can be configured based on empirical values, display panel 101 characteristics, or user needs to balance response speed and power consumption.

[0048] In this application, when the display screen switches back to a heavy-load screen during the gradual deactivation state of the overvoltage drive unit 1022 or within a preset time interval after it has just been turned off, the control unit can utilize a pre-configured activation window to quickly activate the overvoltage drive unit 1022 to a full-power overvoltage drive state. This avoids the delay caused by the overvoltage drive unit 1022 undergoing a complete startup process again, thus ensuring that the heavy-load screen can immediately receive sufficient charging upon reappearance. This effectively prevents display quality problems such as screen flickering, uneven brightness, or ghosting caused by insufficient charging. This solution ensures display quality while also taking into account power consumption management, providing full-power drive only when necessary and gradually reducing or turning off the power during non-heavy-load screens, while responding promptly during rapid switching of heavy-load screens. This improves the performance and user experience of the display device in dynamic screen switching scenarios.

[0049] In some embodiments of this application, how to accurately and effectively configure the parameter configuration table to ensure the performance and display effect of the overvoltage drive is a technical problem that needs to be solved.

[0050] Based on this, in one embodiment, the target grayscale includes 225 grayscale; the overvoltage driving unit 1022 is also used to configure the reference driving voltage corresponding to the 225 grayscale, so that the light effect of the display panel 101 when displaying a 255 grayscale white image reaches the preset brightness standard, so as to obtain the parameter configuration table.

[0051] The target grayscale can be the grayscale level that requires specific voltage configuration or adjustment during the driving process of the display panel 101. In this embodiment, grayscale 225 is used as a key reference point in the configuration parameter configuration table. Grayscale 225 is selected as the target grayscale because it is close to full white (grayscale 255) but still has a certain margin, which facilitates fine voltage calibration to ensure the linearity and accuracy of the overall display effect.

[0052] The reference drive voltage can be a reference voltage value set at a specific grayscale (e.g., 225 grayscale) to achieve a certain preset display effect (such as brightness, chroma, etc.). The overvoltage drive unit 1022 outputs the reference drive voltage corresponding to 225 grayscale through an internal digital-to-analog converter (DAC) or voltage generation circuit. This configuration process can be performed through hardware register settings, firmware programming, or external calibration tools. Its purpose is to provide a stable, calibrated voltage starting point for subsequent overvoltage drives.

[0053] The luminous efficacy refers to the light intensity emitted by the display panel 101 under a specific driving voltage. The preset brightness standard is the brightness level that the display panel 101 should achieve when displaying a full white image (255 grayscale levels), typically determined by product design specifications or industry standards. When configuring a 225 grayscale reference driving voltage, the overvoltage driving unit 1022 monitors in real time or evaluates the luminous efficacy of the display panel 101 when displaying a 255 grayscale white image using a preset model. By iteratively adjusting the 225 grayscale reference driving voltage until the luminous efficacy of the 255 grayscale white image meets the preset brightness standard, the performance of the display panel 101 at maximum brightness meets expectations.

[0054] The parameter configuration table is a data set used to guide the overvoltage drive unit 1022 in performing overvoltage drive operations. It contains information such as the drive voltage and overvoltage compensation value corresponding to different grayscale levels. Through the configuration and calibration of the 225 grayscale reference drive voltage described above, a parameter configuration table covering the entire grayscale range can be derived or generated. For example, based on the calibration results of the 225 grayscale levels, the drive voltage and overvoltage compensation value for other grayscale levels can be calculated through interpolation, fitting, or other algorithms, thereby constructing a complete and optimized parameter configuration table. This table ensures that under heavy load conditions, overvoltage drive can effectively improve the charging rate while maintaining good display quality.

[0055] In this application, 225 grayscale is used as the target grayscale, and its corresponding driving voltage is configured based on this. Simultaneously, the luminous efficacy of the display panel 101 displaying a 255 grayscale white image reaches a preset brightness standard as the calibration target. This allows the display device to efficiently generate or optimize a parameter configuration table, ensuring that the parameter configuration table used by the overvoltage driving unit 1022 during overvoltage driving is brightness-calibrated. This effectively avoids brightness deviations or display abnormalities caused by improper parameter configuration while improving the charging rate of heavy-load scenes. Especially under heavy-load scenes, where the voltage on the data line frequently changes, the parameter configuration table ensures that each pixel reaches the target voltage within a limited charging time, improving image quality and response speed.

[0056] In some embodiments of this application, the overloaded screen may not only include a pure white screen or a specific target grayscale, but may also involve rapid switching between multiple intermediate grayscales between grayscale 0 and grayscale 255. An overvoltage driving strategy based solely on the target grayscale may not be able to adequately guarantee that all intermediate grayscales below grayscale 255 receive sufficient charging within a limited frame time, which may result in poor display effects of intermediate grayscales, such as uneven brightness or flickering.

[0057] Based on this, in one embodiment, the overvoltage driving unit 1022 is also used to perform overvoltage driving on gray levels below 255 gray levels in order to improve the charging rate of the corresponding gray levels.

[0058] Specifically, the overvoltage driving unit 1022 is a key component of the driver chip 102. Its core function is to apply a voltage level higher than the conventional driving voltage to the data lines of the display panel 101. This is intended to accelerate the charging process of the liquid crystal pixels, ensuring that the pixels can quickly and accurately reach their target voltage state in each frame cycle. When overvoltage driving is applied to gray levels below 255 gray levels, an optimized voltage level higher than the standard driving voltage is applied to all brightness levels from gray level 0 to gray level 254. This can be achieved by presetting overvoltage compensation values ​​for different gray levels in the parameter configuration table, or by using a dynamic algorithm to calculate the required overvoltage amount in real time based on the current gray level value and display mode. For example, for a specific intermediate gray level, its standard driving voltage may be V_std, and the overvoltage driving unit 1022 will apply a voltage of V_std + ΔV, where ΔV is the overvoltage compensation value, which can be adjusted according to factors such as the brightness of the gray level and the response speed requirements.

[0059] Meanwhile, the charging rate refers to the speed at which a liquid crystal pixel reaches its target voltage per unit time. In the display panel 101, each pixel can be considered a small capacitor, and its charging speed directly affects the display quality. In heavy-load scenes, especially those containing a large number of rapidly changing intermediate grayscale levels, the pixel's charging time window is very limited. If the charging rate is insufficient, the pixel may not be able to fully charge to the target voltage within the specified time, resulting in a deviation between the actual displayed brightness and the expected brightness, which in turn causes visual problems such as image ghosting, uneven brightness, color distortion, or flickering. By over-driving grayscale levels below 255 grayscale, the pixel charging speed can be effectively improved, ensuring that the pixel is fully charged in each frame cycle, thereby making the display image more stable and clear, and accurately presenting the expected brightness and color.

[0060] This application utilizes the overvoltage driving unit 1022 of the display device to perform overvoltage driving not only for specific target gray levels but also for all gray levels below 255 gray levels. This ensures that under heavy load conditions, especially when the image contains a large number of rapidly changing intermediate gray levels, each pixel receives sufficient charging, thus improving the charging rate of the corresponding gray level. Therefore, even in extreme heavy load scenarios such as horizontal stripe images where the data line voltage frequently jumps between 0 and 255 gray levels, display defects such as uneven brightness, flickering, or ghosting caused by insufficient charging can be effectively avoided. This allows the display panel 101 to more accurately and stably present details of various intermediate gray levels, thereby comprehensively improving the display quality of heavy load images and the user's visual experience.

[0061] In some implementations, the types of heavy-load scenes may vary, and the charging requirements and response characteristics of different gray levels differ. If only a general parameter configuration table and target driving voltage are used for overvoltage driving, it may be difficult to perform fine-grained identification and optimization for specific heavy-load scene modes, resulting in insufficient accuracy of overvoltage driving, failure to maximize charging rate, and even the introduction of unnecessary power consumption or impact on display quality.

[0062] Based on this, in one embodiment, the trigger unit 1021 includes a pattern detection functional unit (PDF); the overvoltage driving unit 1022 includes an advanced overdrive unit (AOD); the parameter configuration table includes an advanced overdrive table (AOD table); the advanced overdrive table stores a two-dimensional parameter table of overvoltage driving parameters for different gray levels, the two-dimensional parameter table including the target gray level, the initial driving voltage, and the initial overvoltage compensation voltage; the initial driving voltage is the standard driving voltage of each target gray level in the liquid crystal driving voltage table; the overvoltage compensation voltage is the voltage compensation value configured under heavy load conditions.

[0063] The pattern detection function unit is used to collect grayscale data of each row of pixels in the display panel 101, detect whether the display screen is a heavy screen based on the grayscale data, and obtain the detection result; when the detection result is that the display screen is a heavy screen, it outputs a trigger signal for the heavy screen to be valid, so as to trigger the voltage regulation unit 1023 and the overvoltage drive unit to work together.

[0064] The advanced overdrive unit is also used to enable the drive function and call the advanced overdrive table. Based on the advanced overdrive table, it determines the initial drive voltage and initial overvoltage compensation voltage corresponding to the current target grayscale. Based on the initial drive voltage, initial overvoltage compensation voltage and target drive voltage, it determines the target overvoltage compensation voltage. Based on the target overvoltage compensation voltage, it performs overvoltage drive on the data lines of the display panel 101 to improve the charging rate of heavy-load screens.

[0065] Specifically, the pattern detection function unit is a refinement of the trigger unit 1021, and its function is to provide heavy-load screen recognition capability. This unit is configured to collect grayscale data of each row of pixels in the display panel 101, and detect whether the displayed screen is a heavy-load screen based on the collected grayscale data, thereby obtaining the detection result. For example, the pattern detection function unit can have a built-in image processing algorithm to analyze the input grayscale data in real time, and determine whether the current screen conforms to the predefined heavy-load screen characteristics, such as a horizontal stripe screen with continuous alternating 0 grayscale and 255 grayscale, through edge detection, frequency analysis, or preset pattern matching. When the detection result indicates that the displayed screen is a heavy-load screen, the pattern detection function unit will output a trigger signal for the heavy-load screen to trigger the voltage adjustment unit 1023 and the overvoltage drive unit to work together.

[0066] Thus, the advanced overdrive unit is configured to enable the drive function and invoke the advanced overdrive table. The advanced overdrive table is a concrete implementation and extension of the parameter configuration table, storing more detailed overvoltage drive parameters. It is a two-dimensional parameter table whose dimensions can include grayscale values, the corresponding initial drive voltage, and the initial overvoltage compensation voltage. This advanced overdrive table can be pre-generated through experiments, simulations, or calibration processes and stored in the memory of the driver chip 102. Based on the advanced overdrive table, the advanced overdrive unit can determine the initial drive voltage and the initial overvoltage compensation voltage corresponding to the current target grayscale. The initial drive voltage is a standard voltage value already existing in the liquid crystal drive voltage table, used for normal display, ensuring that overvoltage drive compensation is performed based on the standard drive voltage. The overvoltage compensation voltage is used to compensate for insufficient charging under heavy load conditions. Subsequently, the advanced overdrive unit calculates and determines the target overvoltage compensation voltage based on the determined initial drive voltage, initial overvoltage compensation voltage, and target drive voltage. Finally, the advanced overdrive unit performs overvoltage drive on the data lines of the display panel 101 based on the determined target overvoltage compensation voltage to improve the charging rate of heavy load conditions.

[0067] As an example, a heavy-load screen can be denoted as an H-Stripe; the LCD driving voltage meter can be denoted as a DC table; the DC table includes 0, ..., 233, ..., 255, corresponding to brightness L0, ..., L233, ..., L255; when the panel is in a heavy-load screen state, the voltage on a data line will jump between its lowest and highest values ​​between each row. Taking the 1G1D architecture as an example, the heavy-load screen is an H-Stripe, consisting of one row being L0 (0 grayscale, black), the next row being L255 (255 grayscale, white), and the next row still being L0, arranged in this manner. At this time, the voltage on a data line changes from 0 to 255 from black to white, and so on. Figure 2Figure 2 illustrates the theoretical and actual charging waveforms in this embodiment. Due to the high-frequency, high-amplitude switching of the voltage, the output power of the drive unit increases significantly, causing a decrease in both the rate of high voltage rise and the rate of low voltage fall. This results in the data potential failing to maintain the required level throughout the charging time, leading to the worst charging amount and rate for the panel under these conditions, and consequently, the lowest charging rate for heavy-load scenes. Therefore, this application uses AOD (Alternating Current Discharge) for overvoltage compensation charging in H-stripe conditions where overvoltage driving is not possible. That is, a higher voltage is used for driving, improving the panel charging rate under extreme conditions. Specifically, Figure 3 This is a schematic diagram showing the driving voltage before and after the change in the embodiments of this application, as shown below. Figure 3 As shown. Adjust the voltage of 223 in the DC table to achieve a panel luminous efficacy of V99, which will be used as the brightness of L255. Then, turn on AOD, adjust the AOD table, and use the original DC table voltage of 255, or a higher voltage, for overvoltage drive to increase the charging rate. The potential for improvement is as follows: Figure 4 As shown. Figure 4 This is a schematic diagram illustrating the range for increasing the charging rate in this application's embodiments. Using PDF, the measures of this application are activated only when a heavy-load screen is detected, avoiding impact on other screens. This application uses voltage adjustment to ensure the panel can still be driven with a higher voltage even on an L255 white screen, thereby improving the charging rate for heavy-load screens. This ensures the panel's luminous efficacy reaches V99 while simultaneously improving the charging rate for heavy-load screens, mitigating COF dark bands and other related defects, without introducing any cost increases.

[0068] The display device in this application can achieve more refined recognition of heavy-load screens and more precise overvoltage drive control. The pattern detection function unit can accurately identify specific heavy-load screen patterns, thereby avoiding unnecessary overvoltage drive for non-heavy-load screens and reducing power consumption. The advanced overdrive unit, combined with the advanced overdrive meter, can provide customized initial drive voltage and initial overvoltage compensation voltage for different gray levels. Taking into account the target drive voltage set by the voltage adjustment unit 1023, it dynamically calculates the most suitable target overvoltage compensation voltage, so that the voltage on the data line of the display panel 101 can reach the target value more quickly and accurately under heavy-load screens, especially when the gray level changes rapidly, thus improving the charging rate and response speed of the liquid crystal pixels. It solves the display problems such as insufficient brightness and ghosting that may occur under heavy-load screens, ensuring the clarity and smoothness of the screen. Moreover, through compensation, it avoids the additional power consumption or potential display quality degradation caused by overdrive, thereby optimizing the energy efficiency of the display device while ensuring the display effect.

[0069] This application also proposes a display method using the aforementioned display device. The method includes: detecting whether the current display screen on the display panel is a heavy-load screen using a trigger unit 1021; when the display screen is a heavy-load screen, triggering a voltage adjustment unit and an overvoltage driving unit to work together; adjusting the target driving voltage corresponding to the target grayscale in the liquid crystal driving voltage table using the voltage adjustment unit, so that the luminous efficacy of the display panel when displaying a white screen reaches a preset brightness; activating the driving function and adjusting the parameter configuration table using the overvoltage driving unit; and performing overvoltage driving on the data lines of the display panel based on the parameter configuration table and the target driving voltage to improve the charging rate of the heavy-load screen, wherein the driving voltage for overvoltage driving the data lines is greater than or equal to the target driving voltage.

[0070] The details of the display method can be found in the previous description of the display device, and will not be repeated here.

[0071] The display device and display method provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. The above modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display device, characterized by comprising: The display panel and a driving chip are included; the driving chip includes a voltage adjusting unit, an overvoltage driving unit and a triggering unit; wherein, The triggering unit is used for detecting whether the current display picture of the display panel is a heavy load picture, and triggering the voltage adjusting unit and the overvoltage driving unit to work cooperatively when the display picture is the heavy load picture; The voltage adjusting unit is used for adjusting a target driving voltage corresponding to a target gray scale in a liquid crystal driving voltage table, so that the light efficiency of the display panel when displaying a white picture reaches a preset brightness; The overvoltage driving unit is used for starting a driving function and adjusting a parameter configuration table, and driving the data lines of the display panel based on the parameter configuration table and the target driving voltage to improve the charging rate of the heavy load picture, wherein the driving voltage for overvoltage driving the data lines is greater than or equal to the target driving voltage.

2. The display device according to claim 1, wherein The heavy load picture includes a horizontal stripe picture composed of 0 gray scale rows and 255 gray scale rows arranged alternately, and the voltage on the data lines of the display panel reciprocally jumps between the voltage values corresponding to 0~255 gray scales.

3. The display device according to claim 2, wherein The target gray scale includes 223 gray scale; the gray scale corresponding to the white picture is 255 gray scale; The voltage adjusting unit is also used for adjusting the target driving voltage corresponding to the 223 gray scale, so that the light efficiency level of the display panel when displaying the white picture with 255 gray scale reaches a preset light efficiency level.

4. The display device according to claim 1, wherein The triggering unit is also used for controlling the overvoltage driving unit to stop working when it is detected that the display picture is not the heavy load picture.

5. The display device according to claim 1, wherein The driving chip further includes a control unit connected with the triggering unit, which is used for controlling the overvoltage driving unit to work in a fading deactivation state within a preset frame period when it is detected that the display picture is switched from the heavy load picture to a non-heavy load picture, gradually reducing the overvoltage driving strength of the overvoltage driving unit by a preset step size until the overvoltage driving unit is completely closed, wherein the overvoltage driving strength is adjusted by the overvoltage value in the parameter configuration table.

6. The display device according to claim 5, wherein The control unit is also used for configuring an activation window, and controlling the overvoltage driving unit to activate to a full-power overvoltage driving state within the activation window when the triggering unit re-detects the heavy load picture, wherein the full-power overvoltage driving state corresponds to a preset maximum overvoltage value driving mode in the liquid crystal driving voltage table, and the activation window is a preset time interval after the overvoltage driving unit is in the fading deactivation state or completely closed.

7. The display device according to claim 1, wherein The target gray scale includes 225 gray scale; the overvoltage driving unit is also used for configuring a reference driving voltage corresponding to the 225 gray scale, so that the light efficiency of the display panel when displaying the white picture with 255 gray scale reaches a preset brightness standard, to obtain the parameter configuration table.

8. The display device according to claim 3, wherein The overvoltage driving unit is also used for overvoltage driving the gray scales below 255 gray scale to improve the charging rate of the corresponding gray scale.

9. A display device according to any one of claims 1-8, characterized in that The triggering unit includes a pattern detection function unit; the overvoltage driving unit includes a high-level overdrive unit; and the parameter configuration table includes a high-level overdrive table. The high-level overdrive table stores a two-dimensional parameter table of different gray scale overvoltage driving parameters, the two-dimensional parameter table including the target gray scale, an initial driving voltage, and an initial overvoltage compensation voltage; the initial driving voltage is a standard driving voltage of each target gray scale in the liquid crystal driving voltage table; and the overvoltage compensation voltage is a voltage compensation value configured under the heavy load picture; The pattern detection function unit is configured to collect gray scale data of each row of pixels in the display panel, detect whether the display picture is the heavy load picture based on the gray scale data, and obtain a detection result; when the detection result is that the display picture is the heavy load picture, output a trigger signal indicating that the heavy load picture is valid, so as to trigger the voltage adjustment unit and the overvoltage driving unit to work cooperatively; The high-level overdrive unit is further configured to start a driving function and call the high-level overdrive table, determine the initial driving voltage and the initial overvoltage compensation voltage corresponding to the target gray scale based on the high-level overdrive table; determine a target overvoltage compensation voltage based on the initial driving voltage, the initial overvoltage compensation voltage, and the target driving voltage; and perform overvoltage driving on data lines of the display panel based on the target overvoltage compensation voltage, so as to improve a charging rate of the heavy load picture.

10. A display method characterized by comprising: The display device of any one of claims 1-9, the method comprising: detecting, by a trigger unit, whether a current display picture of a display panel is a heavy load picture, and triggering a voltage adjustment unit and an overvoltage driving unit to work cooperatively when the display picture is the heavy load picture; adjusting, by the voltage adjustment unit, a target driving voltage corresponding to a target gray scale in a liquid crystal driving voltage table, so that light efficiency of the display panel when displaying a white picture reaches a preset brightness; starting, by the overvoltage driving unit, a driving function and adjusting a parameter configuration table, performing overvoltage driving on data lines of the display panel based on the parameter configuration table and the target driving voltage, so as to improve a charging rate of the heavy load picture, wherein a driving voltage for performing overvoltage driving on the data lines is greater than or equal to the target driving voltage.

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