Display apparatus and driving method therefor, computer-readable storage medium, and computer program product

Abstract

The present application provides a display apparatus and a driving method therefor, a computer-readable storage medium, and a computer program product. In the display apparatus provided by embodiments of the present application, upon detecting that a refresh rate changes periodically, a compensated refresh rate can be outputted on the basis of the real-time refresh rate, and the charging time is adjusted in a timely manner on the basis of the compensated refresh rate, so that the difference between the charging rates of positive and negative displayed image frames is reduced, thereby alleviating the problem of charge residue caused by a large difference between the charging time of positive and negative frames in a display panel, alleviating the problem of afterimages in the displayed images, and improving the display effect.

Description

A display device and its driving method, a computer-readable storage medium and a computer program product thereof.

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411506355.8, filed on October 25, 2024, entitled “A display device and driving method thereof, a computer-readable storage medium and a computer program product thereof,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of display technology, and in particular to a display device and its driving method, a computer-readable storage medium, and a computer program product. Background Technology

[0004] With the development of display technology, the types of display products have gradually increased, and the performance requirements have also gradually improved. For variable refresh rate display devices, when they are used in e-sports products, the refresh rate cycles periodically at multiple fixed frequencies before the game starts. At this time, due to the different refresh rates, the charging time of the positive and negative frames differs greatly. In a short period of time, residual charge in the display panel can easily cause liquid crystal polarization, thus causing the problem of image retention. Summary of the Invention

[0005] Embodiments of this application provide a display device and its driving method, a computer-readable storage medium, and a computer program product; the display device can adjust the charging time in a timely manner after detecting a periodic change in the refresh rate, thereby improving the problem of residual charge in the display panel, improving image retention in the display screen, and enhancing the display effect.

[0006] The embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, embodiments of this application provide a display device, including: a system chip, a circuit board, a driver board, and a display panel, wherein the system chip is electrically connected to the circuit board, the circuit board is electrically connected to the driver board, and the driver board is electrically connected to the display panel;

[0008] The system chip is configured to detect the real-time refresh rate of the display panel, and after detecting that the real-time refresh rate changes periodically, output a compensated refresh rate based on the real-time refresh rate.

[0009] The circuit board is configured to adjust the charging time of sub-pixels in the display panel according to the compensated refresh rate, and generate a voltage control signal according to the charging time; it is also configured to store a preset relationship between refresh rate data and the charging time; the refresh rate data includes the real-time refresh rate and the compensated refresh rate;

[0010] The driver board is configured to generate a data signal based on the voltage control signal;

[0011] The display panel is configured to acquire pixel voltages based on the data signal and display images according to the pixel voltages.

[0012] In some embodiments of the display device provided in this application, the system chip includes a detection module, an information processing module, and an output module.

[0013] The detection module is configured to detect the real-time refresh rate;

[0014] The information processing module is electrically connected to the detection module and is configured to acquire the real-time refresh rate data. After detecting that the real-time refresh rate data changes periodically, it calculates a compensation refresh rate based on the real-time refresh rate.

[0015] The output module is electrically connected to the information processing module and the circuit board, respectively, and is configured to output the compensated refresh rate to the circuit board.

[0016] In some embodiments of the display device provided in this application, the information processing module includes an inversion submodule, which is configured to invert the real-time refresh rate according to the real-time refresh rate of the nth time period and output the compensation refresh rate of the (n+1)th time period, wherein the time consumed by the real-time refresh rate of the nth time period is greater than or equal to the time consumed by the compensation refresh rate of the (n+1)th time period.

[0017] n is an odd number, and the time period is the time consumed by at least one cycle of real-time refresh rate.

[0018] In some embodiments of the display device provided in this application, the compensated refresh rate for the (n+1)th time period is configured to compensate for the real-time refresh rate for the nth time period;

[0019] The real-time refresh rate in the nth time period and the compensated refresh rate in the (n+1)th time period take the same amount of time; the real-time refresh rate in the nth time period and the compensated refresh rate in the (n+1)th time period have the same period but opposite phase.

[0020] In some embodiments of the display device provided in this application, the information processing module includes a copying submodule, which is configured to perform selective copying processing according to the real-time refresh rate and output a compensated refresh rate that does not change the refresh rate.

[0021] In some embodiments of the display device provided in this application, the real-time refresh rate for one cycle includes a first refresh rate and a second refresh rate, and the copying submodule is configured to select to copy the first refresh rate and override the second refresh rate; or, the copying submodule is configured to select to copy the second refresh rate and override the first refresh rate.

[0022] In some embodiments of the display device provided in this application, the information processing module includes an interpolation submodule, which is configured to insert at least one preset value of compensation refresh rate between two adjacent real-time refresh rates according to the real-time refresh rate.

[0023] The real-time refresh rate for one cycle includes a first refresh rate and a second refresh rate, and the preset value of the compensated refresh rate is between the values ​​of the first refresh rate and the second refresh rate.

[0024] In some embodiments of the display device provided in this application, the time period is less than or equal to the time taken to detect the periodic change in the real-time refresh rate.

[0025] In some embodiments of the present application, the display panel is a liquid crystal display panel, and the real-time refresh rate for one cycle ranges from 48Hz to 120Hz.

[0026] Secondly, embodiments of this application provide a driving method for a display device, the display device including a system chip, a circuit board, a driver board, and a display panel, wherein the system chip is electrically connected to the circuit board, the circuit board is electrically connected to the driver board, and the driver board is electrically connected to the display panel;

[0027] The method includes:

[0028] The system chip detects the real-time refresh rate of the display panel in the display device;

[0029] When the real-time refresh rate changes periodically, the system chip outputs a compensation refresh rate based on the real-time refresh rate.

[0030] The circuit board adjusts the charging time of the sub-pixels in the display panel according to the compensated refresh rate, and generates a voltage control signal according to the charging time; wherein, the circuit board stores a preset relationship between refresh rate data and the charging time in advance, and the refresh rate data includes the real-time refresh rate and the compensated refresh rate;

[0031] The driver board generates a data signal based on the voltage control signal;

[0032] The display panel acquires pixel voltages based on the data signal and displays images according to the pixel voltages.

[0033] In some embodiments of the driving method provided in this application, the step of the system chip outputting a compensation refresh rate according to the real-time refresh rate when the real-time refresh rate changes periodically specifically includes:

[0034] The real-time refresh rate is inverted based on the real-time refresh rate of the nth time period, and the compensated refresh rate of the (n+1)th time period is output.

[0035] Wherein, n is an odd number, the time period is the time consumed by at least one cycle of real-time refresh rate; the real-time refresh rate in the nth time period and the compensated refresh rate in the (n+1)th time period have the same time consumed; the real-time refresh rate in the nth time period and the compensated refresh rate in the (n+1)th time period have the same period but opposite phase.

[0036] In some embodiments of the driving method provided in this application, the step of the system chip outputting a compensation refresh rate according to the real-time refresh rate when the real-time refresh rate changes periodically specifically includes:

[0037] Based on the real-time refresh rate, perform selective copying and output a constant compensation refresh rate;

[0038] The real-time refresh rate for one cycle includes a first refresh rate and a second refresh rate; the constant compensation refresh rate is either the first refresh rate or the second refresh rate.

[0039] In some embodiments of the driving method provided in this application, the step of the system chip outputting a compensation refresh rate according to the real-time refresh rate when the real-time refresh rate changes periodically specifically includes:

[0040] Based on the real-time refresh rate, at least one preset value of compensation refresh rate is inserted between two adjacent real-time refresh rates;

[0041] The real-time refresh rate for one cycle includes a first refresh rate and a second refresh rate, and the preset compensation refresh rate is between the values ​​of the first refresh rate and the second refresh rate.

[0042] Thirdly, embodiments of this application provide a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the driving method as described in any of the second aspects.

[0043] Fourthly, embodiments of this application provide a computer program product containing instructions that, when run on a computer, cause the computer to perform the driving method as described in any of the second aspects.

[0044] Embodiments of this application provide a display device and its driving method, a computer-readable storage medium, and a computer program product. The display device includes: a system chip, a circuit board, a driver board, and a display panel. The system chip is configured to detect the real-time refresh rate of the display panel, and after detecting a periodic change in the real-time refresh rate, output a compensated refresh rate based on the real-time refresh rate. The circuit board is configured to adjust the charging time of sub-pixels in the display panel according to the compensated refresh rate, and generate a voltage control signal based on the charging time. The circuit board is also configured to store a preset relationship between refresh rate data and charging time. The refresh rate data includes the real-time refresh rate and the compensated refresh rate. The driver board is configured to generate a data signal based on the voltage control signal. The display panel is configured to acquire pixel voltages based on the data signal and display an image based on the pixel voltages.

[0045] When the refresh rate of a display device cycles periodically at multiple fixed frequencies, the charging time for positive and negative frames differs significantly due to the different refresh rates. This results in residual charge in the display panel for a short period, which can easily cause liquid crystal polarization. In the display device provided in the embodiments of this application, after detecting a periodic change in the refresh rate, a compensation refresh rate can be output based on the real-time refresh rate, and the charging time can be adjusted in a timely manner based on the compensation refresh rate. This reduces the difference in charging rates between positive and negative frames, thereby improving the problem of residual charge in the display panel caused by the large difference in charging time between positive and negative frames, improving image retention in the display screen, and enhancing the display effect.

[0046] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 is a schematic diagram of the connection structure between a display device and a control device provided in an embodiment of this application;

[0049] Figure 2 is a schematic diagram of the structure of a system chip in a display device provided in an embodiment of this application;

[0050] Figures 3A, 3B, and 3C are schematic diagrams of the structure of three information processing modules in the system chip provided in the embodiments of this application;

[0051] Figure 4 is a schematic diagram of a circuit board structure provided in an embodiment of this application;

[0052] Figure 5 is a power consumption analysis chart of charging time at a real-time refresh rate provided by an embodiment of this application;

[0053] Figure 6 is a charging time and power analysis diagram for a refresh rate compensation method provided in an embodiment of this application. Detailed Implementation

[0054] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0055] In the embodiments of this application, the terms "first", "second", "third", "fourth" are used to distinguish the same or similar items with essentially the same function and effect, only for the purpose of clearly describing the technical solution of the embodiments of this application, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0056] In the embodiments of this application, the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0057] In the description of this specification, the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this application. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0058] In the embodiments of this application, "multiple" means two or more, and "at least one" means one or more, unless otherwise explicitly defined.

[0059] The features such as "parallel," "perpendicular," and "identical" used in the embodiments of this application include features in the strict sense of "parallel," "perpendicular," and "identical," as well as cases where "approximately parallel," "approximately perpendicular," and "approximately identical" include certain tolerances. Taking into account the measurement and the tolerances associated with the measurement of a specific quantity (e.g., limitations of the measurement system), they represent the acceptable deviation range for a specific value as determined by a person skilled in the art. For example, "approximately" can mean within one or more standard deviations, or within 3% or 5% of said value.

[0060] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open and encompassing, that is, "including, but not limited to".

[0061] The polygons used in this specification are not strictly defined; they can be approximate triangles, parallelograms, trapezoids, pentagons, or hexagons, and may have minor deformations due to tolerances.

[0062] For variable refresh rate displays, when used in esports products, they typically include static and dynamic modes. Before the game starts, the display uses static mode, and after the game starts, it uses dynamic mode. In static mode, multiple (at least two) fixed refresh rates cycle periodically; in dynamic mode, the refresh rate changes randomly.

[0063] Different refresh rates in display devices result in different charging times. Taking a 4K display product (4K resolution refers to a high-definition display standard with 4096 pixels in the horizontal direction) as an example, the theoretical charging time of a pixel is 3.7μs / frame at a refresh rate of 60Hz and 1.85μs / frame at a refresh rate of 120Hz. The polarity of the pixels in the display panel switches every frame. This results in different charging times for pixels in positive and negative frames, and the positive and negative charges cannot cancel each other out. When the refresh rate jumps significantly, it can easily lead to liquid crystal polarization, generating image retention.

[0064] Based on this, embodiments of this application provide a display device and its driving method to improve the aforementioned problem of image retention in display images.

[0065] An embodiment of this application provides a display device, as shown in FIG1. ​​The display device 100 includes: a system chip 102, a circuit board 103, a driver board 104 and a display panel 105. The system chip 102 is electrically connected to the circuit board 103, the circuit board 103 is electrically connected to the driver board 104, and the driver board 104 is electrically connected to the display panel 105.

[0066] The system chip 102 is configured to detect the real-time refresh rate and output a compensation refresh rate based on the real-time refresh rate after detecting a periodic change in the real-time refresh rate.

[0067] Circuit board 103 is configured to adjust the charging time of the display panel according to the compensated refresh rate and generate a voltage control signal according to the charging time; it is also configured to store a preset relationship between refresh rate data and charging time; the refresh rate data includes real-time refresh rate and compensated refresh rate.

[0068] The driver board 104 is configured to generate a data signal based on a voltage control signal;

[0069] The display panel 105 is configured to acquire pixel voltages based on data signals and display images according to the pixel voltages.

[0070] In Figure 1, the control device 101 can be a game console. The control device 101 is electrically connected to the system chip 102 to transmit control signals to the system chip 102.

[0071] The aforementioned display device is a variable refresh rate (VRR) display device.

[0072] In an exemplary embodiment, the system chip 102 can be a SOC chip. The aforementioned system-on-a-chip (SOC) refers to an integrated circuit chip, also known as a system-on-a-chip, meaning that it is a product, an integrated circuit with a specific purpose, which contains a complete system and all the content of embedded software.

[0073] In the embodiments of this application, the system chip 102 can monitor the refresh rate of the display device 100 in real time and identify the refresh rate data. When it determines that the real-time refresh rate of the display device 100 changes periodically, it starts to perform compensation calculation and refresh rate compensation.

[0074] Specifically, when the system chip 102 determines that the real-time refresh rate of the display device 100 changes periodically, the system chip 102 has detected at least two cycles of refresh rate change. Taking the system chip 102 detecting two cycles of refresh rate change as an example, compensation can begin from the refresh rate of the first detected cycle, or compensation can begin from the refresh rate of the second detected cycle.

[0075] For example, taking the inverted compensation method, the periodic refresh rate changes over two cycles are A1, A2, A1, A2; compensation starts from the refresh rate of the first detected cycle, so the output refresh rate can be A1, A2, B1, B2, A1, A2, B1, B2; compensation starts from the refresh rate of the second detected cycle, so the output refresh rate can be A1, A2, A1, A2, B1, B2; where B1 and B2 are the compensation refresh rates for the refresh rate of the second cycle.

[0076] For example, during inverted compensation, B1 = A2, B2 = A1.

[0077] For example, taking the copy compensation method as an example, when the system chip 102 has detected that the refresh rate has undergone two cycles of periodic change, the periodic refresh rate change of the two cycles is A1, A2, A1, A2; then the output refresh rate can be A1, A2, A1, A2, B1, B1, B1, B1…; where B1 is the compensation refresh rate, and B1 can be A1 or A2.

[0078] For example, taking interpolation compensation as an example, the periodic refresh rate changes over two cycles are A1, A2, A1, A2; compensation starts from the refresh rate of the first detected cycle, so the output refresh rate can be A1, B, A2, B, A1, B, A2, B; compensation starts from the refresh rate of the second detected cycle, so the output refresh rate can be A1, A2, A1, B, A2, B, A1, B, A2, B; where B is the compensated refresh rate, and B includes at least one B1, the value of B1 being between A1 and A2.

[0079] In an exemplary embodiment, circuit board 103 may be a PCBA (Printed Circuit Board Assembly), also known as a PCB.

[0080] In an exemplary embodiment, the circuit board 103 includes a timing controller TCON. The timing controller (TCON) is the core circuit for controlling the timing actions in the display panel. Its main function is to process the LVDS or EDP type video signals (including at least one of the three types of signals: RGB data signals, clock signals, and control signals) sent by the system chip SOC and convert them into video signals (such as ISP type signals) that can drive the display panel.

[0081] EDP ​​signal is a signal transmitted through the EDP interface; EDP (Embedded Display Port) interface is a fully digital interface based on the DisplayPort architecture and protocol, which can transmit high-resolution signals with simpler connectors and fewer pins, and can realize the simultaneous transmission of multiple data.

[0082] ISP (Image Signal Processing) primarily processes the output signal from the front end to match different display panel models. Essentially, the timing controller TCON in circuit board 103 processes and converts the video signal transmitted from system chip 102 (SOC) to obtain a signal recognizable by driver board 104, which then transmits it to display panel 105 for normal image display.

[0083] In an exemplary embodiment, as shown in FIG4, the circuit board 103 may include not only a timing controller TCON but also a memory C. The memory C stores a preset relationship between refresh rate data and charging time; for example, when the refresh rate is 120Hz, the charging time is 1.85µs / frame; when the refresh rate is 60Hz, the charging time is 3.7µs / frame. The timing controller TCON is electrically connected to the system chip 102 and the memory C, respectively. Based on the compensated refresh rate and the preset relationship between the refresh rate data (e.g., the compensated refresh rate) and the charging time, it determines the adjusted charging time and then generates a voltage control signal with a specific timing based on the adjusted charging time.

[0084] For example, the timing controller TCON is also electrically connected to the driver board 104 to transmit voltage control signals with specific timing to the driver board 104 (e.g., a driver chip).

[0085] In an exemplary embodiment, the driver board 104 may be a driver chip.

[0086] Examples include SRIC (Source / Read-out IC) type driver chips, TDDIC (Touch with Display Driver IC) type driver chips, and LTDIIC (Large Touch with Display Driver IC) type driver chips. Among them, TDDIC chips integrate the touch driver chip and the display driver chip into a single chip; LTDIIC is a new technology developed based on TDDIC for use in large-size display panels to meet the needs of large screens.

[0087] The driver board 104 generates a data signal based on the voltage control signal and transmits it to the display panel. The display panel 105 charges the sub-pixels based on the received data signal to obtain the pixel voltage of each sub-pixel. Each sub-pixel in the display panel 105 displays the image based on the pixel voltage.

[0088] The aforementioned display panel 105 can be an LCD (Liquid Crystal Display) panel, which may include TN (Twisted Nematic), VA (Vertical Alignment), IPS (In-Plane Switching), or ADS (Advanced Super Dimension Switch) type liquid crystal display panels.

[0089] In related technologies, when the refresh rate of a display device cycles periodically at multiple fixed frequencies, the charging time of positive and negative frames differs significantly due to the different refresh rates. This results in residual charge in the display panel for a short period, which can easily cause liquid crystal polarization. In the display device provided in the embodiments of this application, after detecting a periodic change in the refresh rate, a compensation refresh rate can be output based on the real-time refresh rate, and the charging time can be adjusted in a timely manner based on the compensation refresh rate. This reduces the difference in charging rates between positive and negative frames, thereby improving the problem of residual charge in the display panel caused by the large difference in charging time between positive and negative frames, improving image retention in the display screen, and enhancing the display effect.

[0090] In some embodiments of the display device provided in this application, as shown in FIG2, the system chip 102 includes a detection module 1, an information processing module 2, and an output module 3;

[0091] Detection module 1 is configured to detect the real-time refresh rate;

[0092] Information processing module 2, electrically connected to detection module 1, is configured to acquire real-time refresh rate data and calculate a compensation refresh rate based on the real-time refresh rate after detecting a periodic change in the real-time refresh rate data.

[0093] Output module 3 is electrically connected to information processing module 2 and circuit board 103 respectively, and is configured to output the compensated refresh rate to circuit board 103.

[0094] The specific circuit structure in the information processing module 2 is not limited here; it can be set according to the method of calculating the refresh rate compensation.

[0095] In some embodiments, the information processing module 2 may perform inverted calculations, interpolation calculations, or selective copy calculations.

[0096] In some embodiments of the display device provided in this application, as shown in FIG3A, the information processing module 2 includes an inversion submodule 21. The inversion submodule 21 is configured to invert the real-time refresh rate according to the real-time refresh rate of the nth time period and output the compensation refresh rate of the (n+1)th time period. The time consumed by the real-time refresh rate of the nth time period is greater than or equal to the time consumed by the compensation refresh rate of the (n+1)th time period; n is an odd number, and the time period is the time consumed by the real-time refresh rate of at least one cycle.

[0097] For example, as shown in Figure 5, the real-time refresh rate of the nth time period is 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz; the nth time period is the time taken for 6 frames, and the nth time period is also the time taken for 3 cycles of real-time refresh rate.

[0098] At this point, the compensated refresh rate for the (n+1)th time period can be obtained based on the real-time refresh rate output in the nth time period.

[0099] For example, if the (n+1)th time period is the time consumed by one cycle of real-time refresh rate, then the output compensated refresh rate is 60Hz or 120Hz. It can be understood that the compensated refresh rate of the (n+1)th time period compensates for the real-time refresh rate of one cycle in the nth time period.

[0100] Real-time refresh rate: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz;

[0101] Compensated refresh rate: 60Hz, 120Hz;

[0102] The refresh rate output data is: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 60Hz, 120Hz.

[0103] For example, if the (n+1)th time period is the time consumed by the real-time refresh rate for two cycles, then the output compensated refresh rate is 60Hz, 120Hz, 60Hz, 120Hz. It can be understood that the compensated refresh rate of the (n+1)th time period compensates for the real-time refresh rate of the two cycles in the nth time period.

[0104] Real-time refresh rate: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz;

[0105] Compensated refresh rate: 60Hz, 120Hz, 60Hz, 120Hz;

[0106] The refresh rate output data is: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 60Hz, 120Hz, 60Hz, 120Hz.

[0107] For example, if the (n+1)th time period is the time consumed by the real-time refresh rate for 3 cycles, then the output compensated refresh rate is 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 120Hz. It can be understood that the compensated refresh rate of the (n+1)th time period compensates for the real-time refresh rate of the three cycles in the nth time period.

[0108] Real-time refresh rate: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz;

[0109] Compensated refresh rates: 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 120Hz;

[0110] The refresh rate output data is: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 120Hz.

[0111] For example, when both the nth and n+1th time periods are the time consumed by three cycles of real-time refresh rate, as shown in Figures 5 and 6, when the refresh rate cycles in two frames as shown in Figure 5: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, for example, when the charging time of a positive frame of a product is 1.85μs and the charging time of a negative frame is 3.7μs, taking a display at 255 grayscale as an example (L255), as shown in Figure 5, every two frames generate 1.85μs, -L255 bias charge. Accumulation of this charge can easily cause liquid crystal polarization, resulting in image retention. When the compensated refresh rate is output in the n+1th time period, as shown in Figure 6, every two frames generate 1.85μs, +L255 bias charge; the bias charge generated by the compensated refresh rate in the n+1th time period can cancel out the bias charge generated by the real-time refresh rate in the nth time period, thereby preventing liquid crystal polarization.

[0112] In some embodiments of the display device provided in this application, the compensated refresh rate of the (n+1)th time period is configured to compensate for the real-time refresh rate of the nth time period;

[0113] The real-time refresh rate in the nth time period and the compensated refresh rate in the (n+1)th time period take the same amount of time; the real-time refresh rate in the nth time period and the compensated refresh rate in the (n+1)th time period have the same period but opposite phases.

[0114] For example, if the nth time period is the time taken for 6 frames, and the nth time period is also the time taken for 3 cycles of real-time refresh rate, then the (n+1)th time period is the time taken for 3 cycles of real-time refresh rate. At this time, the output compensated refresh rate is 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 120Hz. It can be understood that the compensated refresh rate of the (n+1)th time period compensates for the real-time refresh rate of the three cycles in the nth time period.

[0115] The above-mentioned "phase opposite" is explained as follows: For example, one cycle of the real-time refresh rate includes refresh rate C1 and refresh rate C2; ​​by inverting refresh rate C1 and refresh rate C2, we get the compensated refresh rate C2 and compensated refresh rate C1 for one cycle; by swapping the two refresh rate data in one cycle, we can get refresh rate data with opposite phase.

[0116] The following example illustrates how to swap two refresh rate data points in a single period to obtain refresh rate data with opposite phases, using the (n+1)th time period as an example of compensating the real-time refresh rate of all three cycles in the nth time period:

[0117] As shown in Figures 5 and 6, when the refresh rate cycles in two frames as shown in Figure 5: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, for example, the charging time for a positive frame of a product is 1.85μs and the charging time for a negative frame is 3.7μs, taking the display at 255 grayscale as an example (L255), then as shown in Figure 5, every two frames generate 1.85μs, -L255 bias charge. After accumulation, this can easily cause liquid crystal polarization problems, resulting in image retention. When the compensated refresh rate is output in the (n+1)th time period (by swapping the two refresh rate data in one cycle to obtain refresh rate data with opposite phases), as shown in Figure 6, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 120Hz are obtained. Every two frames generate 1.85μs, +L255 bias charge. The bias charge generated by the compensated refresh rate in the (n+1)th time period can cancel out the bias charge generated by the real-time refresh rate in the nth time period, thereby preventing the liquid crystal from polarizing.

[0118] In some embodiments of the display device provided in this application, the time periods mentioned above are all less than or equal to the time taken to detect the periodically changing real-time refresh rate.

[0119] For example, since the compensated refresh rate of the (n+1)th time period is configured to compensate for the real-time refresh rate of the nth time period, the time consumed by the (n+1)th time period and the nth time period can be set to be less than or equal to the time consumed by detecting the periodic change in the real-time refresh rate. In this way, the periodic refresh rate can be compensated in a timely manner to avoid the situation where the periodic refresh rate has caused liquid crystal polarization after displaying many frames, and the output compensated refresh rate has a poor effect on compensating for the power bias caused by the real-time refresh rate, thereby improving the refresh rate compensation effect.

[0120] In some embodiments of the display device provided in this application, as shown in FIG3B, the information processing module 2 includes a copying submodule 22, which is configured to perform selective copying processing according to the real-time refresh rate and output a compensated refresh rate that does not change the refresh rate.

[0121] In an exemplary embodiment, after detecting that the real-time refresh rate data is changing periodically, the copying submodule 22 can forcibly selectively copy the refresh rate of odd-numbered frames and overlay it on even-numbered frames, so that the periodically changing refresh rate data becomes a constant refresh rate.

[0122] In an exemplary embodiment, after detecting that the real-time refresh rate data is changing periodically, the copying submodule 22 can forcibly selectively copy the refresh rate of even-numbered frames and overlay it on the odd-numbered frames, so that the periodically changing refresh rate data becomes a constant refresh rate.

[0123] In some embodiments of the display device provided in this application, the real-time refresh rate of one cycle includes a first refresh rate and a second refresh rate. The copying submodule 22 is configured to select to copy the first refresh rate and overwrite the second refresh rate; or, the copying submodule 22 is configured to select to copy the second refresh rate and overwrite the first refresh rate.

[0124] For example, when the refresh rate changes periodically in a two-frame cycle: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, the copy submodule 22 is used to force a continuous output of 60Hz (or force a continuous output of 120Hz) until the periodic refresh rate ends.

[0125] In some embodiments of this application, when a periodic change in real-time refresh rate data is detected, the copying submodule 22 can be used to forcibly selectively copy the first refresh rate and overwrite the second refresh rate; or, the copying submodule 22 can be used to forcibly select and copy the second refresh rate and overwrite the first refresh rate, so that the output refresh rate is a constant refresh rate until the periodic refresh rate ends, thereby making the power bias of the positive and negative frame display screen as balanced as possible, reducing the probability of liquid crystal polarization, thereby improving the image retention problem and improving the display effect.

[0126] In some embodiments of the display device provided in this application, as shown in FIG3C, the information processing module 2 includes an interpolation submodule 23, which is configured to insert at least one preset value of compensation refresh rate between two adjacent real-time refresh rates according to the real-time refresh rate.

[0127] The real-time refresh rate for one cycle includes a first refresh rate and a second refresh rate, and the preset compensation refresh rate is between the values ​​of the first refresh rate and the second refresh rate.

[0128] For example, when the refresh rate changes periodically in a two-frame cycle: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, at least one preset value of compensation refresh rate can be inserted between two adjacent real-time refresh rates (60Hz and 120Hz); at this time, the compensation refresh rate can be any value between 60Hz and 120Hz.

[0129] For example, when a periodic change in the real-time refresh rate is detected, after inserting at least one preset value of compensation refresh rate between two adjacent real-time refresh rates, the output refresh rate is: 120Hz, 110Hz, 100Hz, 90Hz, 80Hz, 60Hz, 120Hz, 110Hz, 100Hz, 90Hz, 80Hz, 60Hz, 120Hz, 110Hz, 100Hz, 90Hz, 80Hz, 60Hz... until the periodic refresh rate ends. In this way, the amount of charge on the pixel bias voltage can be reduced, the liquid crystal polarization time can be delayed, and the probability of liquid crystal polarization can be reduced, thereby improving the image retention problem and enhancing the display effect.

[0130] In some embodiments of the present application, the display panel 105 is a liquid crystal display panel, and the real-time refresh rate of one cycle ranges from 48Hz to 120Hz.

[0131] For example, the real-time refresh rate of the display panel 105 is 50Hz, 60Hz, 70Hz, 80Hz, 90Hz, 100Hz, 110Hz or 120Hz.

[0132] For example, the liquid crystal display panel may include TN (Twisted Nematic), VA (Vertical Alignment), IPS (In-Plane Switching), or ADS (Advanced Super Dimension Switching) liquid crystal display panels. This liquid crystal display panel may include a color filter substrate and an array substrate, and may also include a liquid crystal layer located between the color filter substrate and the array substrate; of course, it may also include other structures such as driving circuitry. Only structures relevant to the inventive point are described here; other structures of the display panel described above can be obtained from related technologies or common knowledge, and will not be elaborated upon here.

[0133] The embodiments of this application provide a driving method for a display device. As shown in FIG1, the display device 100 includes a system chip 102, a circuit board 103, a driver board 104 and a display panel 105. The system chip 102 is electrically connected to the circuit board 103, the circuit board 103 is electrically connected to the driver board 104, and the driver board 104 is electrically connected to the display panel 105.

[0134] The driving method includes:

[0135] S1. The system chip 102 detects the real-time refresh rate of the display panel 105 in the display device 100.

[0136] In the embodiments of this application, the system chip 102 can monitor the refresh rate of the display device 100 in real time and identify the refresh rate data. When it determines that the real-time refresh rate of the display device 100 changes periodically, it starts to perform compensation calculation and refresh rate compensation.

[0137] S2. When the real-time refresh rate changes periodically, the system chip 102 outputs a compensation refresh rate based on the real-time refresh rate.

[0138] When the system chip 102 determines that the real-time refresh rate of the display device 100 changes periodically, the system chip 102 has detected at least two cycles of refresh rate change. Taking the system chip 102 detecting two cycles of refresh rate change as an example, compensation can begin from the refresh rate of the first detected cycle, or compensation can begin from the refresh rate of the second detected cycle.

[0139] S3. The circuit board 103 adjusts the charging time of the sub-pixels in the display panel 105 according to the compensated refresh rate, and generates a voltage control signal according to the charging time. The circuit board 103 stores a preset relationship between refresh rate data and charging time in advance. The refresh rate data includes the real-time refresh rate and the compensated refresh rate.

[0140] In an exemplary embodiment, the circuit board 103 includes a timing controller (TCON) and a memory C. The timing controller (TCON) is the core circuit for controlling the timing actions in the display panel. The memory C stores a preset relationship between refresh rate data and charging time. For example, when the refresh rate data is 120Hz, the charging time is 1.85µs / frame; when the refresh rate data is 60Hz, the charging time is 3.7µs / frame.

[0141] The timing controller TCON is electrically connected to the system chip 102 and the memory C respectively. Based on the compensation refresh rate and the preset relationship between the refresh rate data (e.g., the compensation refresh rate) and the charging time, it determines the adjusted charging time and then generates a voltage control signal with a specific timing based on the adjusted charging time.

[0142] S4, the driver board 104 generates data signals based on the voltage control signal.

[0143] S5, the display panel 105 obtains the pixel voltage based on the data signal and displays the image according to the pixel voltage.

[0144] The driver board 104 generates a data signal based on the voltage control signal and transmits it to the display panel. The display panel 105 charges the sub-pixels based on the received data signal to obtain the pixel voltage of each sub-pixel. Each sub-pixel in the display panel 105 displays the image based on the pixel voltage.

[0145] The aforementioned display device is a variable refresh rate (VRR) display device.

[0146] In related technologies, when the refresh rate of a display device cycles periodically at multiple fixed frequencies, the charging time of positive and negative frames differs significantly due to the different refresh rates. This results in residual charge in the display panel for a short period, which can easily cause liquid crystal polarization.

[0147] In the driving method of the display device provided in the embodiments of this application, after detecting that the refresh rate changes periodically, the display device can output a compensation refresh rate according to the real-time refresh rate and adjust the charging time in a timely manner according to the compensation refresh rate, so as to reduce the difference in charging rate between positive and negative frame display images, thereby improving the problem of charge residue in the display panel caused by the large difference in charging time between positive and negative frames, improving the afterimage in the display image, and improving the display effect.

[0148] In some embodiments of the driving method provided in this application, step S2, where the system chip 102 outputs a compensation refresh rate based on the real-time refresh rate when the real-time refresh rate changes periodically, specifically includes:

[0149] S21. Based on the real-time refresh rate of the nth time period, invert the real-time refresh rate and output the compensated refresh rate of the (n+1)th time period; where n is an odd number, the time period is the time consumed by the real-time refresh rate of at least one cycle; the real-time refresh rate of the nth time period and the compensated refresh rate of the (n+1)th time period have the same time consumption; the real-time refresh rate of the nth time period and the compensated refresh rate of the (n+1)th time period have the same period but opposite phase.

[0150] The system chip 102 includes a detection module 1, an information processing module 2, and an output module 3; the information processing module 2 includes an inversion submodule 21, which is configured to invert the real-time refresh rate according to the real-time refresh rate of the nth time period and output the compensated refresh rate of the (n+1)th time period.

[0151] Specifically, step S21 involves inverting the real-time refresh rate based on the real-time refresh rate of the nth time period and outputting the compensated refresh rate of the (n+1)th time period; where n is an odd number, the time period is the time consumed by at least one cycle of the real-time refresh rate; the real-time refresh rate of the nth time period and the compensated refresh rate of the (n+1)th time period have the same time consumption; and the real-time refresh rate of the nth time period and the compensated refresh rate of the (n+1)th time period have the same period but opposite phase.

[0152] Sub-step: When the real-time refresh rate of the output in the nth time period is 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, then the compensated refresh rate is 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 120Hz; (The nth time period is the time consumed for 6 frames, which is also the time consumed for 3 cycles of real-time refresh rate; therefore, the (n+1)th time period is the time consumed for 3 cycles of real-time refresh rate.)

[0153] In the driving method provided in the embodiments of this application, when the nth time period and the (n+1)th time period are both the time consumed by 3 cycles of real-time refresh rate (the time is equal), as shown in Figures 5 and 6, when the refresh rate jumps in a two-frame cycle as shown in Figure 5: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, for example, when the charging time of a positive frame of a product is 1.85μs and the charging time of a negative frame is 3.7μs, taking the display screen at 255 grayscale as an example (L255), as shown in Figure 5, every two frames generate 1.85μs, -L255 bias charge, which, after accumulation, is very likely to cause liquid crystal polarization problem, resulting in image retention. After the compensated refresh rate is output in the (n+1)th time period, as shown in Figure 6, a bias charge of 1.85μs + L255 is generated every two frames. The bias charge generated by the compensated refresh rate in the (n+1)th time period can be offset by the bias charge generated by the real-time refresh rate in the nth time period, thereby preventing the liquid crystal from polarizing.

[0154] In some embodiments of the driving method provided in this application, step S2, where the system chip outputs a compensation refresh rate based on the real-time refresh rate when the real-time refresh rate changes periodically, specifically includes:

[0155] S22. Based on the real-time refresh rate, perform selective copying and output a constant compensation refresh rate; the real-time refresh rate for one cycle includes the first refresh rate and the second refresh rate; the constant compensation refresh rate is either the first refresh rate or the second refresh rate.

[0156] The system chip 102 includes a detection module 1, an information processing module 2, and an output module 3; the information processing module 2 includes a replication submodule 22.

[0157] Specifically, sub-step 1: When a periodic change in real-time refresh rate data is detected, the first refresh rate can be selectively copied and overwritten by the second refresh rate through the copying sub-module 22;

[0158] Alternatively, in sub-step 2: when a periodic change in the real-time refresh rate data is detected, the copying submodule 22 can be used to force the copying of the second refresh rate and overwrite the first refresh rate.

[0159] In this way, through sub-step 1 or sub-step 2, the output refresh rate can be kept constant until the periodic refresh rate ends. This makes the electrical bias of the positive and negative frames as balanced as possible, reducing the probability of liquid crystal polarization, thereby improving the image retention problem and enhancing the display effect.

[0160] In some embodiments of the driving method provided in this application, step S2, where the system chip outputs a compensation refresh rate based on the real-time refresh rate when the real-time refresh rate changes periodically, specifically includes:

[0161] S23. Based on the real-time refresh rate, insert at least one preset value of compensation refresh rate between two adjacent real-time refresh rates.

[0162] The real-time refresh rate for one cycle includes a first refresh rate and a second refresh rate, and the preset compensation refresh rate is between the values ​​of the first refresh rate and the second refresh rate.

[0163] The system chip 102 includes a detection module 1, an information processing module 2, and an output module 3; the information processing module 2 includes an interpolation submodule 23.

[0164] Specifically, when a periodic change in the real-time refresh rate is detected, at least one preset value of compensation refresh rate can be inserted between two adjacent real-time refresh rates through the interpolation submodule 23.

[0165] For example, when the refresh rate changes periodically in a two-frame cycle: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, at least one preset value of compensation refresh rate can be inserted between two adjacent real-time refresh rates (60Hz and 120Hz); at this time, the compensation refresh rate can be any value between 60Hz and 120Hz.

[0166] For example, when a periodic change in the real-time refresh rate is detected, after inserting at least one preset value of compensation refresh rate between two adjacent real-time refresh rates, the output refresh rate is: 120Hz, 110Hz, 100Hz, 90Hz, 80Hz, 60Hz, 120Hz, 110Hz, 100Hz, 90Hz, 80Hz, 60Hz, 120Hz, 110Hz, 100Hz, 90Hz, 80Hz, 60Hz... until the periodic refresh rate ends. In this way, the amount of charge on the pixel bias voltage can be reduced, the liquid crystal polarization time can be delayed, and the probability of liquid crystal polarization can be reduced, thereby improving the image retention problem and enhancing the display effect.

[0167] Embodiments of this application provide a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform any of the driving methods described above.

[0168] Embodiments of this application provide a computer program product containing instructions that, when run on a computer, cause the computer to perform any of the driving methods described above.

[0169] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A display device, wherein, include: System chips, circuit boards, driver boards, and display panels; The system chip is configured to detect the real-time refresh rate, and after detecting that the real-time refresh rate changes periodically, output a compensation refresh rate based on the real-time refresh rate. The circuit board, electrically connected to the system chip, is configured to adjust the charging time of the display panel according to the compensated refresh rate, and generate a voltage control signal according to the charging time. It is also configured to store a preset relationship between refresh rate data and the charging time; The refresh rate data includes the real-time refresh rate and the compensated refresh rate; The driver board is electrically connected to the circuit board and is configured to generate a data signal according to the voltage control signal; The display panel is electrically connected to the driver board and is configured to acquire pixel voltages based on the data signal and display images according to the pixel voltages.

2. The display device according to claim 1, wherein, The system chip includes a detection module, an information processing module, and an output module; The detection module is configured to detect the real-time refresh rate; The information processing module is electrically connected to the detection module and is configured to acquire the real-time refresh rate data. After detecting that the real-time refresh rate data changes periodically, it calculates a compensation refresh rate based on the real-time refresh rate. The output module is electrically connected to the information processing module and the circuit board, respectively, and is configured to output the compensated refresh rate to the circuit board.

3. The display device according to claim 2, wherein, The information processing module includes an inversion submodule, which is configured to invert the real-time refresh rate according to the real-time refresh rate of the nth time period and output the compensation refresh rate of the (n+1)th time period. The time consumed by the real-time refresh rate of the nth time period is greater than or equal to the time consumed by the compensation refresh rate of the (n+1)th time period. n is an odd number, and the time period is the time consumed by at least one cycle of real-time refresh rate.

4. The display device according to claim 3, wherein, The compensated refresh rate for the (n+1)th time period is configured to compensate for the real-time refresh rate for the nth time period. The real-time refresh rate in the nth time period and the compensated refresh rate in the (n+1)th time period take the same amount of time; the real-time refresh rate in the nth time period and the compensated refresh rate in the (n+1)th time period have the same period but opposite phase.

5. The display device according to claim 2, wherein, The information processing module includes a copying submodule, which is configured to perform selective copying based on the real-time refresh rate and output a compensated refresh rate that does not change the refresh rate.

6. The display device according to claim 5, wherein, The real-time refresh rate for one cycle includes a first refresh rate and a second refresh rate, and the copy submodule is configured to select to copy the first refresh rate and override the second refresh rate; Alternatively, the copy submodule is configured to select to copy the second refresh rate and override the first refresh rate.

7. The display device according to claim 2, wherein, The information processing module includes an interpolation submodule, which is configured to insert at least one preset value of compensation refresh rate between two adjacent real-time refresh rates according to the real-time refresh rate. The real-time refresh rate for one cycle includes a first refresh rate and a second refresh rate, and the preset value of the compensated refresh rate is between the values ​​of the first refresh rate and the second refresh rate.

8. The display device according to claim 3 or 4, wherein, The time period is less than or equal to the time taken to detect the periodic change in the real-time refresh rate.

9. The display device according to any one of claims 1 to 7, wherein, The display panel is a liquid crystal display panel, and the real-time refresh rate in one cycle ranges from 48Hz to 120Hz.

10. A driving method for a display device, wherein, The display device includes a system chip, a circuit board, a driver board, and a display panel. The system chip is electrically connected to the circuit board, the circuit board is electrically connected to the driver board, and the driver board is electrically connected to the display panel. The method includes: The system chip detects the real-time refresh rate of the display panel in the display device; When the real-time refresh rate changes periodically, the system chip outputs a compensation refresh rate based on the real-time refresh rate. The circuit board adjusts the charging time of the sub-pixels in the display panel according to the compensated refresh rate, and generates a voltage control signal according to the charging time; wherein, the circuit board stores a preset relationship between refresh rate data and the charging time in advance, and the refresh rate data includes the real-time refresh rate and the compensated refresh rate; The driver board generates a data signal based on the voltage control signal; The display panel acquires pixel voltages based on the data signal and displays images according to the pixel voltages.

11. The driving method according to claim 10, wherein, The step of the system chip outputting a compensation refresh rate based on the real-time refresh rate when the real-time refresh rate changes periodically specifically includes: The real-time refresh rate is inverted based on the real-time refresh rate of the nth time period, and the compensated refresh rate of the (n+1)th time period is output. Wherein, n is an odd number, the time period is the time consumed by at least one cycle of real-time refresh rate; the real-time refresh rate in the nth time period and the compensated refresh rate in the (n+1)th time period have the same time consumed; the real-time refresh rate in the nth time period and the compensated refresh rate in the (n+1)th time period have the same period but opposite phase.

12. The driving method according to claim 10, wherein, The step of the system chip outputting a compensation refresh rate based on the real-time refresh rate when the real-time refresh rate changes periodically specifically includes: Based on the real-time refresh rate, a selective copying process is performed, and a compensated refresh rate that remains unchanged is output.

13. The driving method according to claim 10, wherein, The step of the system chip outputting a compensation refresh rate based on the real-time refresh rate when the real-time refresh rate changes periodically specifically includes: Based on the real-time refresh rate, at least one preset value of compensation refresh rate is inserted between two adjacent real-time refresh rates; The real-time refresh rate for one cycle includes a first refresh rate and a second refresh rate, and the preset compensation refresh rate is between the values ​​of the first refresh rate and the second refresh rate.

14. A computer-readable storage medium, wherein, The computer-readable storage medium stores instructions that, when executed on the computer, cause the computer to perform the driving method according to any one of claims 10 to 13.

15. A computer program product containing instructions, wherein, When the computer program product is run on a computer, it causes the computer to perform the driving method according to any one of claims 10 to 13.

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