Display device and driving method thereof, computer readable storage medium and computer program product

Abstract

The invention provides a display device and a driving method thereof, a computer readable storage medium and a computer program product. According to the display device provided by the embodiment of the invention, after the periodic change of the refresh rate is detected, the compensation refresh rate can be output according to the real-time refresh rate, and the charging time is adjusted in time according to the compensation refresh rate, so that the difference between the charging rates of the positive and negative frame display pictures is reduced; therefore, the problem of charge residue caused by large charging time difference of positive and negative frames in the display panel is solved, residual images in a display picture are improved, and the display effect is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display device and a driving method thereof, a computer-readable storage medium, and a computer program product. Background Art

[0002] With the development of display technology, the types of display products have gradually increased, and the performance requirements have gradually increased. For variable refresh rate display devices, when they are used in e-sports products, before the game starts, the refresh rate is cycled at multiple fixed frequencies. At this time, due to the different refresh rates, the charging time of the positive and negative frames is quite different. The charge in the display panel will remain in a short time, which can easily cause the polarization of the liquid crystal, thus causing the problem of afterimage. Summary of the invention

[0003] The embodiments of the present application provide a display device and a driving method thereof, a computer-readable storage medium and a computer program product; after detecting that the refresh rate changes periodically, the display device can adjust the charging time in time, thereby improving the problem of residual charge in the display panel, improving the afterimage in the display picture, and improving the display effect.

[0004] The embodiments of the present application adopt the following technical solutions:

[0005] In a first aspect, an embodiment of the present application provides a display device, comprising: a system chip, a circuit board, a driving board, and a display panel, wherein the system chip is electrically connected to the circuit board, the circuit board is electrically connected to the driving board, and the driving board is electrically connected to the display panel;

[0006] 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 compensation refresh rate according to the real-time refresh rate;

[0007] The circuit board is configured to adjust the charging time of the sub-pixels in the display panel according to the compensated refresh rate and generate a voltage control signal according to the charging time; and 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;

[0008] The driving board is configured to generate a data signal according to the voltage control signal;

[0009] The display panel is configured to obtain a pixel voltage based on the data signal and display a picture according to the pixel voltage.

[0010] In the display device provided in some embodiments of the present application, the system chip includes a detection module, an information processing module and an output module.

[0011] The detection module is configured to detect the real-time refresh rate;

[0012] The information processing module is electrically connected to the detection module and is configured to obtain the real-time refresh rate data, and after detecting that the real-time refresh rate data changes periodically, calculate a compensation refresh rate according to the real-time refresh rate;

[0013] 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.

[0014] In the display device provided in some embodiments of the present application, the information processing module includes an inversion submodule, and the inversion submodule 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+1th time period, and 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 compensated refresh rate of the n+1th time period;

[0015] n is an odd number, and the time period is the time consumed by at least one cycle of the real-time refresh rate.

[0016] In the display device provided in some embodiments of the present application, the compensated refresh rate of the n+1th time period is configured to compensate for the real-time refresh rate of the nth time period;

[0017] Among them, the real-time refresh rate in the nth time period and the compensated refresh rate in the n+1th time period take the same time; the real-time refresh rate in the nth time period and the compensated refresh rate in the n+1th time period have the same period and opposite phases.

[0018] In the display device provided in some embodiments of the present application, the information processing module includes a copy submodule, and the copy submodule is configured to perform selective copy processing according to the real-time refresh rate and output a compensated refresh rate with an unchanged refresh rate.

[0019] In the display device provided in some embodiments of the present application, the real-time refresh rate of one cycle includes a first refresh rate and a second refresh rate, and the replication submodule is configured to selectively replicate the first refresh rate and overwrite the second refresh rate; or, the replication submodule is configured to selectively replicate the second refresh rate and overwrite the first refresh rate.

[0020] In the display device provided in some embodiments of the present application, the information processing module includes an interpolation submodule, and the interpolation submodule is configured to insert at least one compensation refresh rate of a preset value between two adjacent real-time refresh rates according to the real-time refresh rate;

[0021] The real-time refresh rate of one cycle includes a first refresh rate and a second refresh rate, and the compensation refresh rate of the preset value is between the values ​​of the first refresh rate and the second refresh rate.

[0022] In the display device provided by some embodiments of the present application, the time period is less than or equal to the time taken to detect the periodic change of the real-time refresh rate.

[0023] In the display device provided in some embodiments of the present application, the display panel is a liquid crystal display panel, and the range of the real-time refresh rate of one cycle includes 48 Hz to 120 Hz.

[0024] In a second aspect, an embodiment of the present application provides a method for driving a display device, wherein the display device includes a system chip, a circuit board, a driving board, and a display panel, wherein the system chip is electrically connected to the circuit board, the circuit board is electrically connected to the driving board, and the driving board is electrically connected to the display panel;

[0025] The method comprises:

[0026] The system chip detects the real-time refresh rate of the display panel in the display device;

[0027] In the case where the real-time refresh rate changes periodically, the system chip outputs a compensation refresh rate according to the real-time refresh rate;

[0028] 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;

[0029] The driving board generates a data signal according to the voltage control signal;

[0030] The display panel obtains a pixel voltage based on the data signal, and displays a picture according to the pixel voltage.

[0031] In the driving method provided in some embodiments of the present application, when the real-time refresh rate changes periodically, the step of the system chip outputting a compensation refresh rate according to the real-time refresh rate specifically includes:

[0032] 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+1th time period;

[0033] Among them, n is an odd number, and the time period is the time consumed by at least one cycle of the real-time refresh rate; the time consumed by the real-time refresh rate of the nth time period and the compensated refresh rate of the n+1th time period are the same; the real-time refresh rate of the nth time period and the compensated refresh rate of the n+1th time period have the same period and opposite phases.

[0034] In the driving method provided in some embodiments of the present application, when the real-time refresh rate changes periodically, the step of the system chip outputting a compensation refresh rate according to the real-time refresh rate specifically includes:

[0035] According to the real-time refresh rate, selective copy processing is performed and a compensation refresh rate with a constant value is output;

[0036] The real-time refresh rate of one cycle includes a first refresh rate and a second refresh rate; the compensation refresh rate with a constant value is the first refresh rate or the second refresh rate.

[0037] In the driving method provided in some embodiments of the present application, when the real-time refresh rate changes periodically, the step of the system chip outputting a compensation refresh rate according to the real-time refresh rate specifically includes:

[0038] According to the real-time refresh rate, insert at least one compensation refresh rate of a preset value between two adjacent real-time refresh rates;

[0039] Among them, the real-time refresh rate of one cycle includes a first refresh rate and a second refresh rate, and the compensation refresh rate of the preset value is between the values ​​of the first refresh rate and the second refresh rate.

[0040] In a third aspect, an embodiment of the present application provides a computer-readable storage medium, wherein instructions are stored in the computer-readable storage medium. When the instructions are executed on the computer, the computer executes the driving method as described in any one of the second aspects.

[0041] In a fourth aspect, an embodiment of the present application provides a computer program product comprising instructions, and when the computer program product is run on a computer, the computer is enabled to execute the driving method as described in any one of the second aspects.

[0042] Embodiments of the present application provide a display device and a driving method thereof, a computer-readable storage medium and a computer program product, wherein the display device comprises: a system chip, a circuit board, a driving board and a display panel; the system chip is configured to detect a real-time refresh rate of the display panel, and after detecting that the real-time refresh rate changes periodically, outputs a compensated refresh rate according to the real-time refresh rate; the circuit board is configured to adjust a 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; the circuit board is also configured to store a preset relationship between refresh rate data and charging time; the refresh rate data comprises a real-time refresh rate and a compensated refresh rate; the driving board is configured to generate a data signal according to the voltage control signal; the display panel is configured to obtain a pixel voltage based on the data signal, and display a picture according to the pixel voltage.

[0043] When the refresh rate of the display device cycles periodically at multiple fixed frequencies, due to the different refresh rates, the charging time of the positive and negative frame display images differs greatly, and charge remains in the display panel for a short time, which can easily cause liquid crystal polarization. In the display device provided in the embodiment of the present application, after detecting that the refresh rate changes periodically, it can output a compensation refresh rate according to the real-time refresh rate, and adjust the charging time in time according to the compensation refresh rate, so that the difference in charging rate of the positive and negative frame display images is reduced, thereby improving the problem of charge residue in the display panel caused by the large difference in charging time of the positive and negative frames, improving the afterimage in the display image, and improving the display effect.

[0044] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 A schematic diagram of a connection structure between a display device and a control device provided in an embodiment of the present application;

[0047] Figure 2 A schematic diagram of the structure of a system chip in a display device provided in an embodiment of the present application;

[0048] Figure 3A , 3B, 3C is a schematic diagram of the structure of three information processing modules in the system chip provided in the embodiment of the present application;

[0049] Figure 4 A schematic diagram of the structure of a circuit board provided in an embodiment of the present application;

[0050] Figure 5 A charging time power analysis diagram with a real-time refresh rate provided in an embodiment of the present application;

[0051] Figure 6 A charging time power analysis diagram for compensating refresh rate is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0053] In the embodiments of the present application, words such as "first", "second", "third", and "fourth" are used to distinguish between identical or similar items with basically the same functions and effects. This is only for the purpose of clearly describing the technical solutions of the embodiments of the present application and shall not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0054] In the embodiments of the present application, the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0055] In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" are intended to indicate that a specific feature, structure, material or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present application. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0056] In the embodiments of the present application, “plurality” means two or more, and “at least one” means one or more, unless otherwise clearly defined.

[0057] The features such as "parallel", "perpendicular", and "same" used in the embodiments of the present application include the features such as "parallel", "perpendicular", and "same" in a strict sense, as well as the cases where "approximately parallel", "approximately perpendicular", "approximately the same", etc. include certain tolerances, taking into account the tolerances related to the measurement of specific quantities (e.g., the limitations of the measurement system), and are expressed as being within the acceptable deviation range for a specific value determined by a person of ordinary skill in the art. For example, "approximately" can mean within one or more standard deviations, or within 3% or 5% of the value.

[0058] Unless the context requires otherwise, throughout the specification and claims, the term "comprising" is to be construed in an open, inclusive sense, ie, meaning "including, but not limited to."

[0059] The polygon in this specification is not a strict polygon, and may be an approximate triangle, parallelogram, trapezoid, pentagon or hexagon, etc., and there may be some small deformations caused by tolerance.

[0060] For variable refresh rate display devices, when used in e-sports products, they can usually include static mode and dynamic mode; before the game starts, the display device displays in static mode, and after the game starts, the display device displays in dynamic mode. In static mode, multiple (at least two) fixed refresh rates are cycled periodically; in dynamic mode, the refresh rate changes randomly.

[0061] The refresh rates of display devices are different, and the charging time is different. Taking a 4K (4K resolution refers to a high-definition display standard with 4096 pixels in the horizontal direction) display product as an example, when the refresh rate is 60Hz, the theoretical charging time of the pixel is 3.7μs / frame, and when the refresh rate is 120Hz, the theoretical charging time of the pixel is 1.85μs / frame. The polarity of the pixels in the display panel switches frame by frame, which results in different charging times for the pixels in the positive and negative frames, and the positive and negative charges cannot be offset. When the refresh rate jumps significantly, it is very easy to cause liquid crystal polarization, resulting in an afterimage of the screen.

[0062] Based on this, an embodiment of the present application provides a display device and a driving method thereof to improve the above-mentioned problem of image retention in the display screen.

[0063] The embodiment of the present application provides a display device, such as Figure 1 As shown, the display device 100 includes: a system chip 102, a circuit board 103, a driving 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 driving board 104, and the driving board 104 is electrically connected to the display panel 105;

[0064] The system chip 102 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 according to the real-time refresh rate;

[0065] The 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; and is also configured to store a preset relationship between refresh rate data and charging time; the refresh rate data includes a real-time refresh rate and a compensated refresh rate;

[0066] The driving board 104 is configured to generate a data signal according to the voltage control signal;

[0067] The display panel 105 is configured to obtain a pixel voltage based on the data signal and display a picture according to the pixel voltage.

[0068] in, Figure 1 The control device 101 in the example may be a game console, and the control device 101 is electrically connected to the system chip 102 to transmit a control signal to the system chip 102 .

[0069] The display device is a variable refresh rate (VRR) display device.

[0070] In an exemplary embodiment, the system chip 102 may be a SOC chip. The system chip SOC (System-on-a-Chip) refers to: an integrated circuit chip, also known as a system on a chip, which means that it is a product, an integrated circuit with a dedicated purpose, which contains a complete system and all the contents of the embedded software.

[0071] In the embodiment of the present 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 calculations and perform refresh rate compensation.

[0072] 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 that the refresh rate has changed for at least two cycles. For example, if the system chip 102 has detected that the refresh rate has changed for two cycles, compensation can be started from the refresh rate of the first cycle detected, or compensation can be started from the refresh rate of the second cycle detected.

[0073] For example, taking the inverted compensation method as an example, the periodic refresh rate changes of two cycles are A1, A2, A1, A2; starting from the refresh rate of the first cycle detected, the output refresh rate can be A1, A2, B1, B2, A1, A2, B1, B2; starting from the refresh rate of the second cycle detected, the output refresh rate can be A1, A2, A1, A2, B1, B2; among them, B1 and B2 are the compensated refresh rates for the refresh rate of the second cycle.

[0074] Exemplarily, during inversion compensation, B1=A2, B2=A1.

[0075] For another example, taking the method of selecting copy compensation as an example, when the system chip 102 has detected that the refresh rate has undergone two periodic changes, the periodic refresh rate changes of the two cycles are A1, A2, A1, A2; then the output refresh rate can be A1, A2, A1, A2, B1, B1, B1, B1...; among them, B1 is the compensation refresh rate, and B1 can be A1 or A2.

[0076] For another example, taking the interpolation compensation method as an example, the periodic refresh rate changes of two cycles are A1, A2, A1, A2; starting from the refresh rate of the first cycle detected, the compensation is then A1, B, A2, B, A1, B, A2, B; starting from the refresh rate of the second cycle detected, the output refresh rate is A1, A2, A1, B, A2, B, A1, B, A2, B; wherein B is the compensated refresh rate, and B includes at least one B1, and the value of B1 is between A1 and A2.

[0077] In an exemplary embodiment, the circuit board 103 may be a PCBA (Printed Circuit Board Assembly) board, which is also called a PCB board.

[0078] In an exemplary embodiment, the circuit board 103 includes a timing controller TCON. The timing controller (Timer Control Register, TCON) serves as a core circuit for controlling timing actions in the display panel. Its main function is to process the LVDS or EDP type video signal (including at least one of the three types of signals: RGB data signal, clock signal, and control signal) sent by the system chip SOC and convert it into a video signal (such as an ISP type signal) that can drive the display panel.

[0079] Among them, the EDP signal is a signal transmitted through the EDP interface; the EDP (Embedded Display Port) interface is a fully digital interface based on the DisplayPort architecture and protocol, which can use a simpler connector and fewer pins to transmit high-resolution signals and can realize simultaneous transmission of multiple data.

[0080] ISP (Image Signal Processing) is mainly to process the front-end output signal and output the signal to match the display panel of different models. It can be understood that the video signal transmitted by the system chip 102 (SOC) is processed and converted by the timing controller TCON in the circuit board 103 to obtain a signal that can be recognized by the driving board 104, and then transmitted to the display panel 105 through the driving board 104 to realize the normal display of the picture.

[0081] In an exemplary embodiment, Figure 4 As shown, the circuit board 103 includes not only a timing controller TCON, but also a memory C; wherein 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 1.85us / frame; when the refresh rate data is 60Hz, the charging time is 3.7us / frame. The timing controller TCON is electrically connected to the system chip 102 and the memory C respectively, and determines the adjusted charging time according to the compensated refresh rate and the preset relationship between the refresh rate data (such as the compensated refresh rate) and the charging time, and then generates a voltage control signal with a specific timing according to the adjusted charging time.

[0082] Exemplarily, the timing controller TCON is also electrically connected to the driving board 104 to transmit a voltage control signal with a specific timing to the driving board 104 (eg, a driving chip).

[0083] In an exemplary embodiment, the driving board 104 may be a driving chip.

[0084] For example, SRIC (Source / Read-out IC) driver chip, TDDIC (Touch with Display Driver IC) driver chip; or LTDIIC (Large Touch with Display Driver IC) driver chip. Among them, TDDIC chip is a touch driver chip and a display driver chip integrated into a single chip; LTDIIC is a new technology developed on the basis of TDDIC and applied to large-size display panels to meet the needs of large screens.

[0085] The driving board 104 generates a data signal according to the voltage control signal and transmits it to the display panel. The display panel 105 charges the sub-pixels according to the received data signal to obtain the pixel voltage of each sub-pixel. Each sub-pixel in the display panel 105 displays the picture according to the pixel voltage.

[0086] Among them, the above-mentioned display panel 105 can be an LCD (Liquid Crystal Display) display panel, wherein the LCD display panel can include TN (Twisted Nematic) type, VA (Vertical Alignment) type, IPS (In-Plane Switching) type or ADS (Advanced Super Dimension Switch) type liquid crystal display panels.

[0087] In the related art, when the refresh rate of the display device cycles periodically at multiple fixed frequencies, at this time, due to the difference in refresh rates, the charging time of the positive and negative frame display images differs greatly, and charge remains in the display panel for a short time, which can easily cause liquid crystal polarization; in the display device provided in the embodiment of the present application, after detecting that the refresh rate changes periodically, it can output a compensation refresh rate according to the real-time refresh rate, and adjust the charging time in time according to the compensation refresh rate, so that the difference in charging rate of the positive and negative frame display images is reduced, thereby improving the problem of charge residue in the display panel caused by the large difference in charging time of the positive and negative frames, improving the afterimage in the display image, and improving the display effect.

[0088] In the display device provided in some embodiments of the present application, Figure 2 As shown, the system chip 102 includes a detection module 1, an information processing module 2 and an output module 3;

[0089] The detection module 1 is configured to detect the real-time refresh rate;

[0090] The information processing module 2 is electrically connected to the detection module 1 and is configured to obtain real-time refresh rate data, and after detecting that the real-time refresh rate data changes periodically, calculate a compensation refresh rate according to the real-time refresh rate;

[0091] The output module 3 is electrically connected to the information processing module 2 and the circuit board 103 , respectively, and is configured to output the compensated refresh rate to the circuit board 103 .

[0092] The specific circuit structure in the above-mentioned information processing module 2 is not limited here, and can be specifically set according to the method of calculating the compensation refresh rate.

[0093] In some embodiments, the information processing module 2 may perform inversion calculation, interpolation calculation or selective copy calculation.

[0094] In the display device provided in some embodiments of the present application, Figure 3A As shown, 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+1th 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 compensated refresh rate of the n+1th time period; n is an odd number, and the time period is the time consumed by at least one cycle of the real-time refresh rate.

[0095] For example, Figure 5 As shown, the real-time refresh rate output in the nth time period is 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz; the nth time period is the time consumed by 6 frames of images, and the nth time period is also the time consumed by 3 cycles of real-time refresh rate;

[0096] At this time, the compensated refresh rate of the (n+1)th time period can be obtained according to the real-time refresh rate output in the nth time period.

[0097] For example, if the n+1th time period is the time taken by one cycle of the real-time refresh rate, the output compensation refresh rate is 60Hz or 120Hz; it can be understood that the compensation refresh rate of the n+1th time period compensates for the real-time refresh rate of one cycle in the nth time period;

[0098] Real-time refresh rate: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz;

[0099] Compensated refresh rate: 60Hz, 120Hz;

[0100] The refresh rate output data is: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 60Hz, 120Hz.

[0101] For another example, the n+1th time period is the time consumed by 2 cycles of real-time refresh rate, and the output compensation refresh rate is 60Hz, 120Hz, 60Hz, 120Hz; it can be understood that the compensation refresh rate of the n+1th time period compensates for the real-time refresh rate of two cycles in the nth time period;

[0102] Real-time refresh rate: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz;

[0103] Compensated refresh rate: 60Hz, 120Hz, 60Hz, 120Hz;

[0104] The refresh rate output data is: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 60Hz, 120Hz, 60Hz, 120Hz.

[0105] For another example, the n+1th time period is the time consumed by 3 cycles of real-time refresh rate, and the output compensation refresh rate is 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 120Hz; it can be understood that the compensation refresh rate of the n+1th time period compensates for the real-time refresh rates of the three cycles in the nth time period;

[0106] Real-time refresh rate: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz;

[0107] Compensated refresh rate: 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 120Hz;

[0108] The refresh rate output data is: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 120Hz.

[0109] For example, when the nth time period and the n+1th time period are both the time consumed by the real-time refresh rate of 3 cycles, combined with Figure 5 and Figure 6 As shown, when the refresh rate is Figure 5 The two-frame one-cycle jump shown in is: 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, take the display image under 255 grayscale as an example (L255), then Figure 5 As shown in , every two frames of the picture will generate 1.85μs, -L255 bias electricity, which will easily cause liquid crystal polarization problems after accumulation, resulting in afterimages. After the compensation refresh rate is output in the n+1th time period, as shown in Figure 6 As shown, every two frames of the picture generate a bias power of 1.85μs, +L255; the bias power generated by the compensation refresh rate in the n+1th time period can offset the bias power generated by the real-time refresh rate in the nth time period, thereby preventing the liquid crystal from being polarized.

[0110] In the display device provided in some embodiments of the present application, the compensation refresh rate of the n+1th time period is configured to compensate for the real-time refresh rate of the nth time period;

[0111] Among them, the real-time refresh rate in the nth time period and the compensation refresh rate in the n+1th time period take the same time; the real-time refresh rate in the nth time period and the compensation refresh rate in the n+1th time period have the same period and opposite phases.

[0112] Exemplarily, the nth time period is the time consumed by 6 frames of images, and the nth time period is also the time consumed by 3 cycles of real-time refresh rate. Then the n+1th time period is the time consumed by 3 cycles of real-time refresh rate. At this time, the output compensation refresh rate is 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 120Hz; it can be understood that the compensation refresh rate of the n+1th time period compensates for the real-time refresh rates of the three cycles in the nth time period.

[0113] Among them, the above-mentioned "opposite phase" is explained as follows: for example, one cycle in the real-time refresh rate includes refresh rate C1 and refresh rate C2; ​​the refresh rate C1 and refresh rate C2 are inverted to obtain a cycle of compensated refresh rate C2 and compensated refresh rate C1. After swapping the two refresh rate data in one cycle back and forth, refresh rate data with opposite phases can be obtained.

[0114] The following specifically takes the compensation refresh rate of the n+1th time period as an example to compensate the real-time refresh rates of the three cycles in the nth time period to explain how to swap the two refresh rate data in one cycle to obtain the refresh rate data with opposite phases, as follows:

[0115] Combination Figure 5 and Figure 6 As shown, when the refresh rate is Figure 5 The two-frame one-cycle jump shown in is: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz. For example, the charging time of a positive frame of a certain product is 1.85μs, and the charging time of a negative frame is 3.7μs. Taking the display image under 255 grayscale as an example (L255), then Figure 5 As shown in , every two frames of the picture will generate 1.85μs, -L255 bias electricity, which will easily cause liquid crystal polarization problems after accumulation, resulting in residual images. When the compensation refresh rate is output in the subsequent n+1 time period (after swapping the two refresh rate data in one cycle, the refresh rate data with opposite phases can be obtained), as shown in Figure 6 As shown, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 120Hz are obtained, and a bias amount of 1.85μs, +L255 is generated every two frames; then the bias amount generated by the compensation refresh rate in the n+1th time period can offset the bias amount generated by the real-time refresh rate in the nth time period, thereby preventing the polarization of the liquid crystal.

[0116] In the display device provided in some embodiments of the present 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.

[0117] Exemplarily, since the compensating refresh rate of the n+1th time period is configured to compensate for the real-time refresh rate of the nth time period, the time consumed by the n+1th time period and the nth time period can be set to be less than or equal to the time consumed by the real-time refresh rate that detects periodic changes. In this way, the periodic refresh rate can be compensated in time to avoid the situation where the periodic refresh rate has caused liquid crystal polarization after a large number of frames of display have been displayed, and the compensating refresh rate output has poor effect on compensating for the power bias caused by the real-time refresh rate, thereby improving the refresh rate compensation effect.

[0118] In the display device provided in some embodiments of the present application, Figure 3B As shown, the information processing module 2 includes a copy submodule 22, and the copy submodule 22 is configured to perform selective copy processing according to the real-time refresh rate and output a compensated refresh rate with an unchanged refresh rate.

[0119] In an exemplary embodiment, after detecting that the real-time refresh rate data changes periodically, the copy submodule 22 can forcibly selectively copy the refresh rate of the odd-numbered frames and overlay it on the even-numbered frames, so that the periodically changing refresh rate data becomes a constant refresh rate.

[0120] In an exemplary embodiment, after detecting that the real-time refresh rate data changes periodically, the copy submodule 22 can forcibly selectively copy the refresh rate of the even-numbered frames and overlay it on the odd-numbered frames, so that the periodically changing refresh rate data becomes a constant refresh rate.

[0121] In the display device provided in some embodiments of the present application, a real-time refresh rate of one cycle includes a first refresh rate and a second refresh rate, and the copy submodule 22 is configured to select to copy the first refresh rate and cover the second refresh rate; or, the copy submodule 22 is configured to select to copy the second refresh rate and cover the first refresh rate.

[0122] Exemplarily, when the refresh rate jumps periodically in a two-frame cycle: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, the replication submodule 22 is used to force the subsequent continuous output of 60Hz (or the subsequent forced continuous output of 120Hz) until the periodic refresh rate ends.

[0123] In some embodiments of the present application, when it is detected that the real-time refresh rate data changes periodically, the first refresh rate can be selectively copied and the second refresh rate can be overwritten by the copy submodule 22; or, the second refresh rate can be selectively copied and the first refresh rate can be overwritten by the copy submodule 22, so that the output refresh rate is a constant refresh rate until the periodic refresh rate ends, so that the power bias of the positive and negative frame display images is as balanced as possible, reducing the probability of liquid crystal polarization, thereby improving the afterimage problem and improving the display effect.

[0124] In the display device provided in some embodiments of the present application, Figure 3C As shown, the information processing module 2 includes an interpolation submodule 23, and the interpolation submodule 23 is configured to insert at least one compensation refresh rate of a preset value between two adjacent real-time refresh rates according to the real-time refresh rate;

[0125] A real-time refresh rate of one cycle includes a first refresh rate and a second refresh rate, and the preset value of the compensation refresh rate is between the values ​​of the first refresh rate and the second refresh rate.

[0126] Exemplarily, when the refresh rate jumps periodically in a two-frame cycle: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, then at least one compensating refresh rate of a preset value can be inserted between two adjacent real-time refresh rates (60Hz and 120Hz); at this time, the compensating refresh rate can be any value between 60Hz and 120Hz.

[0127] For example, when it is detected that the real-time refresh rate changes periodically, after inserting at least one preset 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 charge amount of the pixel bias voltage can be reduced, the polarization time of the liquid crystal can be delayed, and the probability of liquid crystal polarization can be increased, thereby improving the afterimage problem and improving the display effect.

[0128] In the display device provided 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 48 Hz to 120 Hz.

[0129] Exemplarily, the real-time refresh rate of the display panel 105 is 50 Hz, 60 Hz, 70 Hz, 80 Hz, 90 Hz, 100 Hz, 110 Hz or 120 Hz.

[0130] Exemplarily, the liquid crystal display panel may include a TN (Twisted Nematic) type, a VA (Vertical Alignment) type, an IPS (In-Plane Switching) type, or an ADS (Advanced Super Dimension Switch) type liquid crystal display panel. The 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 a driving circuit. Only structures related to the invention point are introduced here, and other structures of the above-mentioned display panel can be obtained according to relevant technologies or common knowledge, and will not be repeated here.

[0131] The embodiment of the present application provides a driving method of a display device, such as Figure 1 As shown, the display device 100 includes a system chip 102, a circuit board 103, a driving 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 driving board 104, and the driving board 104 is electrically connected to the display panel 105;

[0132] The driving method includes:

[0133] S1 . The system chip 102 detects a real-time refresh rate of the display panel 105 in the display device 100 .

[0134] In the embodiment of the present 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 calculations and perform refresh rate compensation.

[0135] S2. When the real-time refresh rate changes periodically, the system chip 102 outputs a compensated refresh rate according to the real-time refresh rate.

[0136] 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 that the refresh rate has changed for at least two cycles. For example, if the system chip 102 has detected that the refresh rate has changed for two cycles, compensation can be started from the refresh rate of the first cycle detected, or compensation can be started from the refresh rate of the second cycle detected.

[0137] 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; wherein the circuit board 103 stores a preset relationship between the 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.

[0138] In an exemplary embodiment, the circuit board 103 includes a timing controller TCON and a memory C. The timing controller (Timer Control Register, TCON) serves as a 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 1.85us / frame; when the refresh rate data is 60Hz, the charging time is 3.7us / frame.

[0139] The timing controller TCON is electrically connected to the system chip 102 and the memory C respectively, and determines the adjusted charging time according to the compensated refresh rate and the preset relationship between the refresh rate data (such as the compensated refresh rate) and the charging time, and then generates a voltage control signal with a specific timing according to the adjusted charging time.

[0140] S4. The driving board 104 generates a data signal according to the voltage control signal.

[0141] S5. The display panel 105 obtains a pixel voltage based on the data signal, and displays a picture according to the pixel voltage.

[0142] The driving board 104 generates a data signal according to the voltage control signal and transmits it to the display panel. The display panel 105 charges the sub-pixels according to the received data signal to obtain the pixel voltage of each sub-pixel. Each sub-pixel in the display panel 105 displays the picture according to the pixel voltage.

[0143] The display device is a variable refresh rate (VRR) display device.

[0144] In the related art, when the refresh rate of the display device is periodically cycled at multiple fixed frequencies, due to the different refresh rates, the charging time of the positive and negative frames is greatly different, and the charge in the display panel remains in a short time, which can easily cause liquid crystal polarization;

[0145] In the driving method of the display device provided in the embodiment of the present application, after detecting that the refresh rate changes periodically, the display device can output a compensatory refresh rate according to the real-time refresh rate, and timely adjust the charging time according to the compensated refresh rate, so that the charging rate difference between the positive and negative frame display images is reduced, thereby improving the charge residual problem caused by the large difference in the charging time of the positive and negative frames in the display panel, improving the afterimage in the display image, and improving the display effect.

[0146] In the driving method provided in some embodiments of the present application, S2, when the real-time refresh rate changes periodically, the step of the system chip 102 outputting a compensation refresh rate according to the real-time refresh rate specifically includes:

[0147] S21. 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+1th time period; wherein n is an odd number, and 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+1th time period consume the same time; the real-time refresh rate of the nth time period and the compensated refresh rate of the n+1th time period have the same period and opposite phases.

[0148] 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+1th time period.

[0149] Among them, S21, inverting the real-time refresh rate according to the real-time refresh rate of the nth time period, and outputting the compensated refresh rate of the n+1th time period; wherein n is an odd number, and 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+1th time period are the same; the real-time refresh rate of the nth time period and the compensated refresh rate of the n+1th time period have the same cycle, and the steps of opposite phases may specifically include:

[0150] Sub-steps: when the real-time refresh rate output in the nth time period is 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz; then the output compensation refresh rate is 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, 120Hz; (the nth time period is the time consumed by 6 frames of images, that is, the nth time period is also the time consumed by 3 cycles of real-time refresh rate; then the n+1th time period is the time consumed by 3 cycles of real-time refresh rate.)

[0151] In the driving method provided in the embodiment of the present application, when the nth time period and the n+1th time period are both the time consumed by the real-time refresh rate of 3 cycles (the time is equal), combined with Figure 5 and Figure 6 As shown, when the refresh rate is Figure 5 The two-frame one-cycle jump shown in is: 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, take the display image under 255 grayscale as an example (L255), then Figure 5As shown in , every two frames of the picture will generate 1.85μs, -L255 bias electricity, which will easily cause liquid crystal polarization problems after accumulation, resulting in afterimages. After the compensation refresh rate is output in the n+1th time period, as shown in Figure 6 As shown, every two frames of the picture generate a bias power of 1.85μs, +L255; the bias power generated by the compensation refresh rate in the n+1th time period can offset the bias power generated by the real-time refresh rate in the nth time period, thereby preventing the liquid crystal from being polarized.

[0152] In the driving method provided in some embodiments of the present application, S2, when the real-time refresh rate changes periodically, the step of the system chip outputting a compensation refresh rate according to the real-time refresh rate specifically includes:

[0153] S22, according to the real-time refresh rate, perform selective copy processing and output a compensation refresh rate with a constant value; the real-time refresh rate of one cycle includes a first refresh rate and a second refresh rate; the compensation refresh rate with a constant value is the first refresh rate or the second refresh rate.

[0154] 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 .

[0155] Specifically, sub-step 1: when it is detected that the real-time refresh rate data changes periodically, the first refresh rate can be forcibly selectively copied and the second refresh rate can be overwritten by the copy sub-module 22;

[0156] Alternatively, sub-step 2: when it is detected that the real-time refresh rate data changes periodically, the copy sub-module 22 may forcibly select to copy the second refresh rate and overwrite the first refresh rate.

[0157] In this way, through sub-step 1 or sub-step 2, the output refresh rate can be made constant until the periodic refresh rate ends, so that the power bias of the positive and negative frame display images is as balanced as possible, reducing the probability of liquid crystal polarization, thereby improving the afterimage problem and improving the display effect.

[0158] In the driving method provided in some embodiments of the present application, S2, when the real-time refresh rate changes periodically, the step of the system chip outputting a compensation refresh rate according to the real-time refresh rate specifically includes:

[0159] S23, inserting at least one compensation refresh rate of a preset value between two adjacent real-time refresh rates according to the real-time refresh rate;

[0160] Among them, the real-time refresh rate of one cycle includes a first refresh rate and a second refresh rate, and the compensation refresh rate of the preset value is between the values ​​of the first refresh rate and the second refresh rate.

[0161] 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 .

[0162] Specifically, when it is detected that the real-time refresh rate changes periodically, at least one compensation refresh rate of a preset value may be inserted between two adjacent real-time refresh rates through the interpolation submodule 23 .

[0163] Exemplarily, when the refresh rate jumps periodically in a two-frame cycle: 120Hz, 60Hz, 120Hz, 60Hz, 120Hz, 60Hz, then at least one compensating refresh rate of a preset value can be inserted between two adjacent real-time refresh rates (60Hz and 120Hz); at this time, the compensating refresh rate can be any value between 60Hz and 120Hz.

[0164] For example, when it is detected that the real-time refresh rate changes periodically, after inserting at least one preset 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 charge amount of the pixel bias voltage can be reduced, the polarization time of the liquid crystal can be delayed, and the probability of liquid crystal polarization can be increased, thereby improving the afterimage problem and improving the display effect.

[0165] An embodiment of the present application provides a computer-readable storage medium, in which instructions are stored. When the instructions are executed on the computer, the computer executes any of the driving methods described above.

[0166] An embodiment of the present application provides a computer program product comprising instructions, and when the computer program product is run on a computer, the computer is enabled to execute any of the driving methods described above.

[0167] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A display device, in, include: System chips, circuit boards, driver boards and display panels; The system chip is configured to detect a real-time refresh rate, and after detecting that the real-time refresh rate changes periodically, output a compensation refresh rate according to the real-time refresh rate; The circuit board is electrically connected to the system chip and 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; 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 driving 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 driving board, and is configured to obtain a pixel voltage based on the data signal and display a picture according to the pixel voltage.

2. The display device according to claim 1, in, 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 obtain the real-time refresh rate data, and after detecting that the real-time refresh rate data changes periodically, calculate a compensation refresh rate according to 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, in, 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 compensated refresh rate of the n+1th time period, and 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 compensated refresh rate of the n+1th time period; n is an odd number, and the time period is the time consumed by at least one cycle of the real-time refresh rate.

4. The display device according to claim 3, in, The compensated refresh rate of the n+1th time period is configured to compensate for the real-time refresh rate of the nth time period; Among them, the real-time refresh rate in the nth time period and the compensated refresh rate in the n+1th time period take the same time; the real-time refresh rate in the nth time period and the compensated refresh rate in the n+1th time period have the same period and opposite phases.

5. The display device according to claim 2, in, The information processing module includes a copy submodule, and the copy submodule is configured to perform selective copy processing according to the real-time refresh rate and output a compensated refresh rate with an unchanged refresh rate.

6. The display device according to claim 5, in, The real-time refresh rate of one cycle includes a first refresh rate and a second refresh rate, and the copy submodule is configured to selectively copy the first refresh rate and cover the second refresh rate; Alternatively, the copy submodule is configured to selectively copy the second refresh rate and overwrite the first refresh rate.

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

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

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

10. A method for driving a display device, in, The display device comprises a system chip, a circuit board, a driving board and a display panel, wherein the system chip is electrically connected to the circuit board, the circuit board is electrically connected to the driving board, and the driving board is electrically connected to the display panel; The method comprises: The system chip detects the real-time refresh rate of the display panel in the display device; In the case where the real-time refresh rate changes periodically, the system chip outputs a compensation refresh rate according to 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 driving board generates a data signal according to the voltage control signal; The display panel obtains a pixel voltage based on the data signal, and displays a picture according to the pixel voltage.

11. The driving method according to claim 10, in, In the case where the real-time refresh rate changes periodically, the step of the system chip outputting a compensation refresh rate according to the real-time refresh rate specifically includes: 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+1th time period; Among them, n is an odd number, and the time period is the time consumed by at least one cycle of the real-time refresh rate; the time consumed by the real-time refresh rate of the nth time period and the compensated refresh rate of the n+1th time period are the same; the real-time refresh rate of the nth time period and the compensated refresh rate of the n+1th time period have the same period and opposite phases.

12. The driving method according to claim 10, in, In the case where the real-time refresh rate changes periodically, the step of the system chip outputting a compensation refresh rate according to the real-time refresh rate specifically includes: According to the real-time refresh rate, selective copy processing is performed and a compensated refresh rate with an unchanged refresh rate is output.

13. The driving method according to claim 10, in, In the case where the real-time refresh rate changes periodically, the step of the system chip outputting a compensation refresh rate according to the real-time refresh rate specifically includes: According to the real-time refresh rate, insert at least one compensation refresh rate of a preset value between two adjacent real-time refresh rates; Among them, the real-time refresh rate of one cycle includes a first refresh rate and a second refresh rate, and the compensation refresh rate of the preset value is between the values ​​of the first refresh rate and the second refresh rate.

14. A computer-readable storage medium, in, The computer-readable storage medium stores instructions, and when the instructions are executed on the computer, the computer executes the driving method according to any one of claims 10 to 13.

15. A computer program product comprising instructions, in, When the computer program product is run on a computer, the computer is enabled to execute the driving method according to any one of claims 10 to 13.

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