Driving module and driving method of display panel, and display device

Abstract

This disclosure provides a driving module and driving method for a display panel, as well as a display device, belonging to the field of display technology. The driving method includes: determining voltage variation parameters for each driving partition; the driving partition comprising a plurality of adjacent sub-pixels; the voltage variation parameter of the driving partition being the maximum value of the driving voltage variation corresponding to each sub-pixel in the driving partition; the driving voltage variation corresponding to the sub-pixel being the absolute value of the difference between the driving voltage of the sub-pixel and the driving voltage of the adjacent sub-pixel in the previous row of the same column; determining the driving force of each driving partition based on the voltage variation parameters of each driving partition; and driving each sub-pixel of the driving partition according to the driving force of the driving partition. This driving method can reduce driving power consumption.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more specifically, to a driving module and driving method for a display panel, and a display device. Background Technology

[0002] When a display panel displays an image, such as an OLED display panel, the driving voltage on the data lines needs to change according to the grayscale of the driven sub-pixels. Therefore, the source driving circuit that applies the driving voltage to the data lines needs to perform voltage switching according to the required driving voltage, resulting in power consumption. For normal image display, the driving voltage on the data lines also needs to reach the required voltage value quickly, meaning the rise time and fall time during voltage switching must be very short. This requires the source driving circuit to have a large driving force, leading to higher power consumption.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a driving module and driving method for a display panel, as well as a display device, to reduce driving power consumption.

[0005] According to one aspect of this disclosure, a method for driving a display panel is provided, comprising:

[0006] Determine the voltage change parameters of each driving partition; the driving partition includes multiple adjacent sub-pixels; the voltage change parameter of the driving partition is the maximum value of the driving voltage change corresponding to each sub-pixel in the driving partition; the driving voltage change corresponding to the sub-pixel is the absolute value of the difference between the driving voltage of the sub-pixel and the driving voltage of the adjacent sub-pixel in the previous row of the same column;

[0007] The driving force of each driving partition is determined based on the voltage change parameters of each driving partition.

[0008] According to one embodiment of this disclosure, determining the voltage variation parameter of one of the drive partitions includes:

[0009] Determine the grayscale change of each sub-pixel corresponding to a sub-pixel group in the driving partition; the sub-pixel group includes a first sub-pixel and a second sub-pixel that are adjacent in the same column, and the second sub-pixel is located in the sub-pixel row above the first sub-pixel; the grayscale change of the sub-pixel group is the absolute value of the difference between the grayscale of the first sub-pixel and the grayscale of the second sub-pixel; the sub-pixel group corresponding to the sub-pixel is the sub-pixel group with the sub-pixel as the first sub-pixel;

[0010] In the sub-pixel groups corresponding to each sub-pixel of the driving partition, the reference sub-pixel groups of each type of sub-pixel group are determined; in the same type of sub-pixel group, the color combination of the sub-pixels of each sub-pixel group is the same; the grayscale change of the reference sub-pixel group of the same type of sub-pixel group is greater than the grayscale change of other sub-pixel groups of the same type of sub-pixel group.

[0011] Determine the amount of driving voltage change for each of the reference sub-pixel groups;

[0012] The maximum value of the driving voltage change of each of the reference sub-pixel groups is used as the voltage change parameter of the driving partition.

[0013] According to one embodiment of this disclosure, determining the amount of driving voltage change for one of the reference sub-pixel groups includes:

[0014] Based on the grayscale of the first sub-pixel, the grayscale of the second sub-pixel, the gamma correction curve, and the luminance-scale factor curve of the reference sub-pixel group, the driving voltage of the first sub-pixel and the driving voltage of the second sub-pixel are determined.

[0015] The absolute value of the difference between the driving voltage of the first sub-pixel and the driving voltage of the second sub-pixel is obtained as the driving voltage change of the reference sub-pixel group.

[0016] According to one embodiment of this disclosure, determining the driving voltage of the first sub-pixel includes:

[0017] The theoretical driving voltage of the first sub-pixel is determined based on the grayscale of the first sub-pixel and the gamma correction curve corresponding to the first sub-pixel.

[0018] The driving voltage of the first sub-pixel is determined based on the theoretical driving voltage of the first sub-pixel, the set screen brightness, and the brightness-scale factor curve.

[0019] Determining the driving voltage of the second sub-pixel includes:

[0020] The theoretical driving voltage of the second sub-pixel is determined based on the grayscale of the second sub-pixel and the gamma correction curve corresponding to the second sub-pixel.

[0021] The driving voltage of the second sub-pixel is determined based on the theoretical driving voltage of the second sub-pixel, the set screen brightness, and the brightness-scale factor curve.

[0022] According to one embodiment of this disclosure, determining the driving voltage of the first sub-pixel based on the theoretical driving voltage of the first sub-pixel, the set screen brightness, and the brightness-scale factor curve includes:

[0023] Determine the scaling factor of the first sub-pixel based on the set screen brightness and brightness-scale factor curve;

[0024] The product of the theoretical driving voltage and the scaling factor of the first sub-pixel is obtained as the driving voltage of the first sub-pixel.

[0025] The step of determining the driving voltage of the second sub-pixel based on the theoretical driving voltage of the second sub-pixel, setting the image brightness, and the brightness-scale factor curve includes:

[0026] The scaling factor of the second sub-pixel is determined based on the set screen brightness and brightness-scale factor curve;

[0027] The product of the theoretical driving voltage and the scaling factor of the second sub-pixel is obtained as the driving voltage of the second sub-pixel.

[0028] According to one embodiment of this disclosure, the driving partition includes each sub-pixel of a frame.

[0029] According to one embodiment of the present disclosure, a frame is divided into multiple different segments, each of which can be independently encoded and decoded.

[0030] The number of drive partitions is multiple, and each partition corresponds to one of the multiple shards.

[0031] According to one embodiment of this disclosure, any one of the driving partitions includes one or more subpixel rows.

[0032] According to one embodiment of this disclosure, determining the driving force of the driving partition based on a voltage change parameter of the driving partition includes:

[0033] Based on the voltage change parameters of the driving partition, determine the voltage change range to which the voltage change parameters of the driving partition belong;

[0034] The driving force of the driving zone is determined based on the voltage variation range and the driving force-voltage variation range table.

[0035] According to one embodiment of this disclosure, determining the driving force of the driving partition based on a voltage change parameter of the driving partition includes:

[0036] Based on the voltage change parameters of the drive partition and the driving force-voltage change parameter table, a linear interpolation algorithm is used to determine the driving force corresponding to the voltage change parameters of the drive partition.

[0037] According to another aspect of this disclosure, a driving module for a display panel is provided, comprising:

[0038] A voltage change parameter determination circuit is configured to determine the voltage change parameters of each driving partition; the driving partition includes multiple adjacent sub-pixels; the voltage change parameter of the driving partition is the maximum value of the driving voltage change corresponding to each sub-pixel in the driving partition; the driving voltage change corresponding to the sub-pixel is the absolute value of the difference between the driving voltage of the sub-pixel and the driving voltage of the adjacent sub-pixel in the previous row of the same column;

[0039] A driving force determination circuit is configured to determine the driving force of each driving zone based on voltage variation parameters of each driving zone.

[0040] The source drive circuit is configured to drive each of the sub-pixels of the drive partition according to the driving force of the drive partition.

[0041] According to another aspect of this disclosure, a display device is provided, including the above-described driving module and display panel, wherein the driving module is electrically connected to the display panel.

[0042] According to one embodiment of this disclosure, the display panel is an OLED display panel, a QLED display panel, a Micro LED display panel, or a Mini LED display panel.

[0043] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0044] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0045] Figure 1 This is a schematic diagram of the structure of the display panel in one embodiment of the present disclosure.

[0046] Figure 2 This is a partial cross-sectional view of the display panel in one embodiment of the present disclosure.

[0047] Figure 3 This is a schematic diagram of the structure of a display device in one embodiment of the present disclosure.

[0048] Figure 4 This is a flowchart illustrating a method for driving a display panel in one embodiment of the present disclosure.

[0049] Figure 5 This is a schematic diagram of the driving module in one embodiment of the present disclosure.

[0050] Figure 6 This is a schematic diagram of the brightness-proportion factor curve in one embodiment of the present disclosure.

[0051] Figure 7 This is a schematic diagram of the arrangement structure of each sub-pixel in one embodiment of the present disclosure.

[0052] Figure 8 This is a schematic diagram of the arrangement structure of each sub-pixel in one embodiment of the present disclosure.

[0053] Figure 9 This is a schematic diagram of the driving force-voltage variation parameter range table in one embodiment of the present disclosure.

[0054] Figure 10 This is a schematic diagram of a driving force-voltage variation parameter table in one embodiment of the present disclosure. Detailed Implementation

[0055] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0056] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0057] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0058] This disclosure provides a driving method for a display panel PNL to dynamically adjust the driving force of the source driving circuit, thereby avoiding excessive power consumption due to excessive driving force of the source driving circuit and reducing the power consumption of the source driving circuit and the driving module.

[0059] See Figure 1 The display panel PNL includes a display area AA and a peripheral area BB located on at least one side of the display area AA. In the display area AA, the display panel PNL has an array of display units DU, each display unit DU including a sub-pixel PIX and a pixel driving circuit PDC that drives the sub-pixel PIX. The display panel PNL does not have display units DU in the peripheral area BB, or the displayed units DU are not used for displaying images. See also Figure 1 The display panel PNL has multiple scan lines GL extending along the row direction DH in the display area AA, with each scan line GL corresponding to a row of display units. The pixel driving circuit PDC of each display unit DU in each row of display units is electrically connected to its corresponding scan line GL. The display panel PNL also has multiple data lines DL extending along the column direction DV in the display area AA, with each data line DL corresponding to a column of display units. The pixel driving circuit PDC of each display unit DU in each column of display units is electrically connected to its corresponding data line DL. Thus, the pixel driving circuit PDC of each display unit DU is connected to one scan line GL and one data line DL. When a scan signal is applied to the scan line GL, the driving voltage applied to the data line DL can be written into the pixel driving circuit PDC, allowing the pixel driving circuit PDC to control the brightness of the sub-pixel PIX based on the written driving voltage. Specifically, the pixel driving circuit (PDC) can control the magnitude of the driving current when driving the sub-pixel (PIX) based on the magnitude of the written driving voltage, thereby controlling the brightness of the sub-pixel (PIX).

[0060] Optionally, the pixel driving circuit PDC includes at least a data writing transistor, a driving transistor, and a storage capacitor. The gate of the driving transistor can be electrically connected to one electrode plate of the storage capacitor. The source of the data writing transistor can be electrically connected to the data trace DL, and the gate of the data writing transistor can be electrically connected to the scan trace GL. The pixel driving circuit PDC is configured such that when a scan signal is applied to the scan trace GL, the data writing transistor is turned on, thereby causing the driving voltage on the data trace DL to be written to the gate of the driving transistor and the storage capacitor. When the data writing transistor is turned off, the driving voltage can be maintained by the storage capacitor. The driving transistor can output a driving current to drive the sub-pixel PIX to emit light under the control of the voltage on its gate. It is understood that the pixel driving circuit PDC of the present disclosure embodiment may also include other transistors or capacitors to give the pixel driving circuit PDC better driving performance. For example, the pixel driving circuit PDC can be a 7T1C (7 thin film transistors and one storage capacitor), an 8T1C (8 thin film transistors and one storage capacitor), or a pixel driving circuit with other architectures.

[0061] Optionally, the sub-pixel PIX can be a current-driven self-emissive element, such as any one of OLED, PLED, QLED, Micro LED, Mini LED, etc. In this embodiment, the sub-pixel PIX can include multiple sub-pixel PIXs of different colors, such as a red sub-pixel for emitting red light, a blue sub-pixel for emitting green light, and a green sub-pixel for emitting green light. It is understood that in other embodiments of this disclosure, the sub-pixel PIX in the display area AA can also have sub-pixel PIXs of other colors (e.g., a yellow sub-pixel for emitting yellow light, a cyan sub-pixel for emitting cyan light, a white sub-pixel for emitting white light, etc.).

[0062] In one embodiment of this disclosure, see Figure 2 The display panel PNL may include a substrate SBT, a driving layer DRL, and a pixel layer PIXL stacked sequentially. The pixel layer PIXL contains sub-pixels PIX, and the driving layer DRL contains a pixel driving circuit PDC for driving the sub-pixels PIX; each sub-pixel PIX can emit light under the drive of the pixel driving circuit PDC to display an image. Furthermore, the display panel PNL also includes a thin-film encapsulation layer TFE located on the side of the pixel layer PIXL away from the driving layer DRL, which encapsulates and protects the pixel layer PIXL.

[0063] Optionally, the substrate SBT can be an inorganic material substrate or an organic material substrate; of course, it can also be a composite substrate formed by stacking inorganic and organic material substrates. For example, in some embodiments of this disclosure, the material of the substrate SBT can be glass materials such as soda-lime glass, quartz glass, and sapphire glass. In other embodiments of this disclosure, the material of the substrate SBT can be polymethyl methacrylate, polyvinyl alcohol, polyvinylphenol, polyethersulfone, polyimide, polyamide, polyacetal, polycarbonate, polyethylene terephthalate, polyethylene naphthalate, or combinations thereof. In other embodiments of this disclosure, the substrate SBT can also be a flexible substrate, for example, the material of the substrate SBT may include polyimide.

[0064] Optionally, in the driving layer DRL, any pixel driving circuit PDC may include a thin-film transistor (TFT) and a storage capacitor. Further, the TFT can be selected from top-gate, bottom-gate, or dual-gate TFTs; the active layer of the TFT can be made of amorphous silicon, low-temperature polycrystalline silicon, metal-oxide-semiconductor, organic semiconductor, carbon nanotube, or other types of semiconductor materials; the TFT can be an N-type or P-type TFT.

[0065] It is understood that any two transistors in a pixel driving circuit can be of the same or different types. Exemplarily, in some embodiments, some transistors in a pixel driving circuit can be N-type transistors and some transistors can be P-type transistors. Further exemplarily, in other embodiments, in a pixel driving circuit, the active layer material of some transistors can be low-temperature polycrystalline silicon (LTPS) semiconductor material, and the active layer material of some transistors can be metal-oxide-semiconductor (MODS) semiconductor material. In some embodiments of this disclosure, the thin-film transistor is a LPS transistor. In other embodiments of this disclosure, some thin-film transistors are LPS transistors, and some thin-film transistors are MODS transistors.

[0066] Optionally, the driving layer DRL may include a semiconductor layer SCL, a gate insulating layer GI, a gate layer GT, an interlayer dielectric layer ILD, a source / drain metal layer SD, and a planarization layer PLN, stacked between the substrate SBT and the pixel layer PIXL. Each thin-film transistor and storage capacitor can be formed from the semiconductor layer SCL, gate insulating layer GI, gate layer GT, interlayer dielectric layer ILD, and source / drain metal layer SD. The positional relationship of each layer can be determined based on the thin-film transistor's layer structure. Further, the semiconductor layer SCL can be used to form the channel region of the transistor, and can also be used to form partial traces or conductive structures if necessary. The gate layer can be used to form one or more gate layer traces such as scan traces, reset control traces, and light emission control traces, or it can be used to form the gate of the transistor, or it can be used to form part or all of the electrode plates of the storage capacitor. The source / drain metal layer can be used to form data traces, power supply voltage traces, or other source / drain metal layer traces, or it can be used to form part of the electrode plates of the storage capacitor. Of course, in other embodiments of this disclosure, the driving layer DRL may also include other film layers as needed, such as a light-shielding layer located between the semiconductor layer SCL and the substrate SBT. As needed, any one of the above-mentioned semiconductor layer SCL, gate layer GT, source / drain metal layer SD may be multiple layers. For example, the driving layer DRL may include two different semiconductor layers SCL, or two or three source / drain metal layers SD, or two or three gate layers GT. Correspondingly, the insulating film layers in the driving layer DRL (such as gate insulating layer GI, interlayer dielectric layer ILD, planarization layer PLN, etc.) may be increased or decreased adaptively, or new insulating film layers may be added as needed.

[0067] Optionally, the driving layer DRL may also include a passivation layer, which may be disposed on the surface of the source / drain metal layer SD away from the substrate SBT, in order to protect the source / drain metal layer SD.

[0068] As an example, see Figure 4 The driving layer DRL may include an inorganic buffer layer BUF, a semiconductor layer SCL, a gate insulating layer GI, a gate layer GT, an interlayer dielectric layer ILD, a source / drain metal layer SD, and a planarization layer PLN stacked sequentially. The thin film transistor formed in this way is a top-gate thin film transistor.

[0069] In one embodiment of this disclosure, see Figure 2 In the pixel layer PIXL, the sub-pixel PIX is a thin-film light-emitting element (LD), which may include two electrodes stacked together and a light-emitting functional unit sandwiched between the two electrodes. For example, see... Figure 2The pixel layer PIXL may include a pixel electrode layer PEL, an emissive functional layer EFL, and a common electrode layer COML stacked sequentially. The pixel electrode layer PEL has multiple pixel electrodes in the display area of ​​the display panel; the portion of the emissive functional layer EFL connected to the pixel electrodes serves as the emissive functional unit of the sub-pixel PIX; and the common electrode layer COML serves as the common electrode and is electrically connected to the emissive functional units of each sub-pixel PIX.

[0070] Furthermore, the pixel layer PIXL may also include a pixel definition layer PDL located between the pixel electrode layer PEL and the light-emitting functional layer EFL. The pixel definition layer PDL has multiple through-holes that correspond one-to-one with the multiple pixel electrodes, with each pixel opening exposing at least a portion of the corresponding pixel electrode. For example, the pixel definition layer PDL covers the edge of the pixel electrode and exposes at least a portion of the internal region of the pixel electrode, so that the pixel definition layer PDL can effectively define the actual effective region of the pixel electrode (the region directly connected to the light-emitting functional unit), thereby defining the light-emitting region and light-emitting area of ​​the sub-pixel PIX. The light-emitting functional layer EFL at least covers the pixel electrode exposed by the pixel definition layer PDL. The common electrode layer COML may cover the light-emitting functional layer EFL in the display area. The pixel electrodes and the common electrode layer COML provide electrons, holes, and other charge carriers to the light-emitting functional layer EFL, causing the light-emitting functional layer EFL to emit light. The portion of the light-emitting functional layer EFL located between the pixel electrodes and the common electrode layer COML can serve as a light-emitting functional unit. The pixel electrodes, the common electrode layer COML, and the light-emitting functional unit form the sub-pixel PIX. In this design, one of the pixel electrode and the common electrode layer COML serves as the anode of the sub-pixel PIX, and the other serves as the cathode of the sub-pixel PIX.

[0071] In one example, the pixel electrode serves as the anode of the sub-pixel PIX, and the common electrode layer COML serves as the cathode of the sub-pixel PIX.

[0072] It is understandable that different types of light-emitting elements (LDs) have different materials and films for their light-emitting functional units.

[0073] For example, when the light-emitting element is an OLED, the light-emitting functional unit may include an organic light-emitting layer, and may include one or more of the following: a hole injection layer, a hole transport layer, an electron blocking layer, an electron transport layer, and an electron injection layer. Furthermore, the organic light-emitting layer may include a host material and a guest material, wherein the guest material may be a fluorescent dopant or a phosphorescent dopant, particularly a thermally activated delayed fluorescence material. When the OLED adopts a stacked structure, a charge generation layer may also be provided in the light-emitting functional layer (EFL).

[0074] For example, when the light-emitting element is a QLED, the light-emitting functional unit may include a quantum dot layer, and may include one or more of the following: a hole injection layer, an electron transport layer, an electron blocking layer, a hole blocking layer, an electron transport layer, and an electron injection layer. Furthermore, the quantum dot layer may have quantum dot particles, which can be interconnected through surface modification groups. When the QLED adopts a stacked structure, a charge generation layer may also be provided in the light-emitting functional unit.

[0075] See Figure 2 The thin-film encapsulation layer (TFE) can be disposed on the surface of the pixel layer PIXL away from the substrate SBT, and it can include alternately stacked inorganic and organic encapsulation layers. The inorganic encapsulation layer can effectively block external moisture and oxygen, preventing water and oxygen from invading the pixel layer PIXL and causing material aging in the pixel layer PIXL. Optionally, the edge of the inorganic encapsulation layer can be located in the peripheral area. The organic encapsulation layer is located between two adjacent inorganic encapsulation layers to achieve planarization and reduce stress between the inorganic encapsulation layers. The edge of the organic encapsulation layer can be located between the edge of the display area and the edge of the inorganic encapsulation layer. Exemplarily, the thin-film encapsulation layer TFE includes a first inorganic encapsulation layer CVD1, an organic encapsulation layer IJP, and a second inorganic encapsulation layer CVD2, which are sequentially stacked on the side of the pixel layer PIXL away from the substrate SBT. Of course, in other embodiments of this disclosure, the display panel may not have a thin-film encapsulation layer, but may use other methods to encapsulate and protect the pixel layer.

[0076] In some embodiments of this disclosure, see Figure 2 The display panel PNL may also include a touch function layer TSL, which may be disposed on the side of the thin film encapsulation layer TFE away from the driving layer DRL, so that the display panel PNL has touch function.

[0077] In some embodiments of this disclosure, see Figure 2 The display panel PNL may also include a reduction reflectance layer CFL, which can be disposed on the side of the thin film encapsulation layer TFE away from the driving layer DRL to reduce reflection of ambient light and improve display quality.

[0078] See Figure 3The display device may include a display panel (PNL) and a drive module (CTR) that drives the PNL. The CTR can apply a drive signal to the PNL to display an image. For example, the CTR may include a source drive circuit that applies the required drive voltage to each data trace (DL) of the PNL to drive each sub-pixel (PIX). In related technologies, the source drive circuit can use a large and constant drive force to drive each sub-pixel (providing a large drive current so that the drive voltage on the data trace (DL) rises or falls rapidly). However, the drive force of the source drive circuit is not adjusted according to the specific situation of the displayed image. In some cases, the drive force may be significantly higher than the required drive force, which leads to high overall power consumption and wasted power in the source drive circuit.

[0079] In this disclosure, see Figure 4 The driving methods for the display panel PNL include:

[0080] Step S110: Determine the voltage change parameters of each driving partition DA; the driving partition DA includes multiple adjacent sub-pixels PIX; the voltage change parameter of the driving partition DA is the maximum value of the driving voltage change corresponding to each sub-pixel PIX in the driving partition DA; the driving voltage change corresponding to the sub-pixel PIX is the absolute value of the difference between the driving voltage of the sub-pixel PIX and the driving voltage of the adjacent sub-pixel PIX in the previous row of the same column;

[0081] Step S120: Determine the driving force of each driving partition DA based on the voltage change parameters of each driving partition DA;

[0082] Step S130: Drive each of the sub-pixels PIX of the driving partition DA according to the driving force of the driving partition DA.

[0083] According to the driving method for the display panel PNL provided in this disclosure, the display panel PNL can be driven according to driving zones DA. Before driving each sub-pixel (PIX) in each driving zone DA, the voltage variation parameters of that driving zone DA are determined. If the voltage variation parameters of the driving zone DA are relatively small, it indicates that the driving voltage difference between two adjacent sub-pixels in the same column is relatively small, and a smaller driving force is sufficient to fully charge the pixel driving circuit (PDC) of the sub-pixel. In this embodiment, a driving force matching the voltage variation parameters of the driving zone DA can be selected, thereby avoiding the use of excessive driving force when the voltage variation parameters of the driving zone DA are small, and thus avoiding power consumption waste caused by excessive driving force. In this way, the driving method can reduce the driving force while ensuring that the driving force meets the driving requirements, avoiding excessive power consumption caused by excessive driving force.

[0084] In one embodiment of this disclosure, see Figure 5 The drive module CTR may include:

[0085] A voltage change parameter determination circuit U1 is configured to determine the voltage change parameters of each driving partition DA; the driving partition DA includes multiple adjacent sub-pixels PIX; the voltage change parameter of the driving partition DA is the maximum value of the driving voltage change corresponding to each sub-pixel PIX in the driving partition DA; the driving voltage change corresponding to the sub-pixel PIX is the absolute value of the difference between the driving voltage of the sub-pixel PIX and the driving voltage of the adjacent sub-pixel PIX in the previous row of the same column;

[0086] The driving force determination circuit U2 is configured to determine the driving force of each driving partition DA based on the voltage change parameters of each driving partition DA.

[0087] The source drive circuit U3 is configured to drive each of the sub-pixels PIX of the drive partition DA according to the driving force of the drive partition DA.

[0088] In this way, the CTR driver module can implement the above-mentioned driving method, thereby reducing the power consumption of the source driver circuit.

[0089] The following, with reference to the accompanying drawings and examples, provides an exemplary description and analysis of the principle and process of driving the PNL (Power Line Display) panel. It is understood that the following analysis of the principle and process of driving the PNL panel can also be applied to the various circuits of the CTR (Chip Module Transmitter) of a display device.

[0090] In this embodiment, the driving module CTR can determine the voltage change parameters of each driving partition DA based on the received image data. The image data includes at least the grayscale of each sub-pixel (PIX) of a frame. It is understood that each sub-pixel (PIX) of the image data is an image sub-pixel, and the sub-pixels on the display panel PNL are screen sub-pixels. The display device is used to make the screen sub-pixels emit light based on the grayscale of the image sub-pixels, such that the grayscale of the screen sub-pixels is equal to or substantially equal to the grayscale of the image sub-pixels. It is understood that in some cases, the driving module CTR can also correct or compensate for the grayscale of the image sub-pixels, or there may be signal deviations in the driving process of the driving module CTR, insufficient charging rate of the display panel PNL, or other possible situations where the grayscale of the screen sub-pixels may not perfectly match the grayscale of the image sub-pixels.

[0091] In this embodiment of the disclosure, the driving module CTR can apply driving voltage to each sub-pixel PIX according to the image data, and control the driving force when applying driving voltage to each sub-pixel PIX to avoid power waste caused by excessive driving force.

[0092] In one embodiment of this disclosure, in step S110, the voltage change parameter of one of the drive partitions DA can be determined using the following method:

[0093] Step S210: Determine the grayscale change of the sub-pixel group corresponding to each sub-pixel PIX of the driving partition DA; the sub-pixel group includes a first sub-pixel and a second sub-pixel that are adjacent in the same column, and the second sub-pixel is located in the previous sub-pixel row of the first sub-pixel; the grayscale change of the sub-pixel group is the absolute value of the difference between the grayscale of the first sub-pixel and the grayscale of the second sub-pixel; the sub-pixel group corresponding to the sub-pixel PIX is the sub-pixel group with the sub-pixel PIX as the first sub-pixel;

[0094] Step S220: Determine the reference sub-pixel group for each sub-pixel PIX of the driving partition DA; in the same type of sub-pixel group, the color combination of each sub-pixel PIX in each sub-pixel group is the same; the grayscale change of the reference sub-pixel group of the same type of sub-pixel group is greater than the grayscale change of other sub-pixel groups of the same type of sub-pixel group.

[0095] Step S230: Determine the amount of change in the driving voltage of each of the reference sub-pixel groups;

[0096] Step S240: The maximum value of the driving voltage change of each of the reference sub-pixel groups is used as the voltage change parameter of the driving partition DA.

[0097] In this embodiment, the sub-pixel groups with potentially the largest driving voltage changes can be selected first by calculating the grayscale changes of the sub-pixel groups (reference sub-pixel groups); then, the driving voltage changes corresponding to these sub-pixel groups are calculated, and the maximum value of the driving voltage change is found. This can significantly reduce the computational load of determining the voltage change parameters of the driving partition DA. For example, if the driving voltage of each sub-pixel is first calculated based on the grayscale of each sub-pixel, then the driving voltage change of the sub-pixel group is calculated based on the driving voltage of each sub-pixel, and finally the maximum value is selected from the driving voltage changes, the computational load will increase significantly. In particular, display devices often require gamma correction to improve display effects, which makes calculating the driving voltage of a sub-pixel based on its grayscale a large computational load. However, in this embodiment, only the driving voltage of a portion of the sub-pixel groups needs to be determined to achieve the determination of the voltage change parameters with high accuracy, which can greatly reduce the computational load and further reduce power consumption.

[0098] In this embodiment, "adjacent in the same column" means that the pixel driving circuit PDC of the first sub-pixel and the pixel driving circuit PDC of the second sub-pixel are connected to the same data trace DL, and both are connected to two adjacent scan traces GL. "The second sub-pixel is located in the row above the first sub-pixel" means that when driving the display panel PNL, the first and second sub-pixels are driven sequentially through the same data trace DL; specifically, the second sub-pixel is driven first, and the first sub-pixel is driven later. Thus, the change in driving voltage of the sub-pixel group reflects the change in driving voltage on the data trace DL when switching from driving the second sub-pixel to driving the first sub-pixel. The rate of change of this driving voltage is related to the driving force of the source driving circuit. The greater the driving force of the source driving circuit, the faster the data trace DL charges or discharges, the faster the driving voltage changes, and correspondingly, the greater the power consumption. Conversely, the smaller the driving force of the source driving circuit, the slower the data trace DL charges or discharges, the slower the driving voltage changes, and correspondingly, the lower the power consumption. Understandably, if the driving force of the source driver circuit is too small, resulting in insufficient driving capability, the driving voltage on the data trace (DL) will rise or fall too slowly, potentially leading to insufficient charging rate in the pixel driver circuit (PDC). Therefore, ensuring the source driver circuit has a sufficiently large driving force while avoiding excessively exceeding the required driving force can reduce power consumption while guaranteeing normal driving of the sub-pixels (PIX) in the driving partition (DA).

[0099] In this embodiment, subpixel groups can be divided into multiple categories based on the type of color combination of subpixel pixels (PIX) within the subpixel group, and then a reference subpixel group can be determined for each category. For example, if the first subpixel of two subpixel groups has the same color, and the second subpixel also has the same color, then the two subpixel groups belong to the same category. As another example, if the first subpixel of the first subpixel group has the same color as the second subpixel of the second subpixel group, and the second subpixel of the first subpixel group has the same color as the first subpixel of the second subpixel group, then the two subpixel groups belong to the same category.

[0100] In one embodiment of this disclosure, the driving voltage change of a reference sub-pixel group can be determined using the following method:

[0101] Based on the grayscale of the first sub-pixel, the grayscale of the second sub-pixel, the gamma correction curve, and the luminance-scale factor curve of the reference sub-pixel group, the driving voltage of the first sub-pixel and the driving voltage of the second sub-pixel are determined.

[0102] The absolute value of the difference between the driving voltage of the first sub-pixel and the driving voltage of the second sub-pixel is obtained as the driving voltage change of the reference sub-pixel group.

[0103] For example, the theoretical driving voltage of the first sub-pixel can be determined first based on the grayscale of the first sub-pixel and the gamma correction curve corresponding to the first sub-pixel; then, the driving voltage of the first sub-pixel can be determined based on the theoretical driving voltage of the first sub-pixel, the set screen brightness, and the brightness-scale factor curve.

[0104] For another example, the theoretical driving voltage of the second sub-pixel can be determined first based on the grayscale of the second sub-pixel and the gamma correction curve corresponding to the second sub-pixel; then, the driving voltage of the second sub-pixel can be determined based on the theoretical driving voltage of the second sub-pixel, the set screen brightness, and the brightness-scale factor curve.

[0105] In this embodiment, the gamma correction curve is a gamma correction curve at the rated maximum brightness, used to reflect the driving voltage corresponding to different gray levels when displaying at the rated maximum brightness. For example, when the rated maximum display brightness of the display device is set to 500 nits, the gamma correction curve is the gamma correction curve when the maximum screen brightness is 500 nits. Furthermore, different color sub-pixels require different gamma correction curves.

[0106] In one example, the gamma correction curve can be presented as a lookup table, which includes multiple bound gray levels and their corresponding driving voltages. For instance, the driving voltages corresponding to the bound gray levels can be stored in a gamma register in a preset order. When determining the driving voltage based on the gamma correction curve, a linear interpolation algorithm can be used to determine the driving voltage (theoretical driving voltage) corresponding to the gray level of the sub-pixel PIX.

[0107] In this embodiment, the driving voltage of the sub-pixel PIX is determined solely based on the grayscale and gamma correction curve of the sub-pixel PIX, without considering the set screen brightness of the display device. This driving voltage is the theoretical driving voltage of the sub-pixel PIX.

[0108] In this embodiment, the display device can receive an external control signal to control the set screen brightness of the display panel PNL, where the maximum value of the set screen brightness is the rated maximum display brightness. For example, if the maximum display brightness of the display device is 500 nits, the set screen brightness can be 100 nits, 200 nits, 300 nits, 400 nits, or 500 nits.

[0109] In this implementation, the luminance-scale factor curve is used to reflect the mapping relationship between luminance and the scale factor. In one example, luminance can be represented using DBV. For example, in Figure 6 In the example luminance-scale factor curve, luminance is represented using DBV. It is understandable that... Figure 6 In the examples provided, the maximum value of DBV is 4096; in other examples disclosed herein, the maximum value of DBV may be other values. It is understood that... Figure 6 The luminance-scale factor curve shown is merely an example; the scale factor corresponding to different DBV values ​​can be selected as needed or for correction. Of course, luminance can also be represented using other parameters or forms. In one example, the luminance-scale factor curve can be presented as a lookup table, for example, showing multiple preset luminance values ​​(e.g., preset DBV values) and their corresponding scale factors.

[0110] Optionally, the scaling factor can be determined based on the brightness-scaling factor curve and the set screen brightness, for example, by using a linear interpolation algorithm to determine the scaling factor corresponding to the set screen brightness. Then, the driving voltage of the sub-pixel PIX is determined based on the scaling factor and the theoretical driving voltage, for example, by using the product of the scaling factor and the theoretical driving voltage as the driving voltage of the sub-pixel PIX.

[0111] In one example, the theoretical driving voltage of the first sub-pixel is determined based on the grayscale of the first sub-pixel and the gamma correction curve corresponding to the first sub-pixel; the scaling factor of the first sub-pixel is determined based on the set screen brightness and the brightness-scaling factor curve; and the product of the theoretical driving voltage and the scaling factor of the first sub-pixel is obtained as the driving voltage of the first sub-pixel.

[0112] In one example, the theoretical driving voltage of the second sub-pixel is determined based on the grayscale of the second sub-pixel and the gamma correction curve corresponding to the second sub-pixel; the scaling factor of the second sub-pixel is determined based on the set screen brightness and the brightness-scaling factor curve; and the product of the theoretical driving voltage and the scaling factor of the second sub-pixel is obtained as the driving voltage of the second sub-pixel.

[0113] It is understood that in other embodiments of this disclosure, other methods may be used to determine the voltage variation parameters of each drive partition DA.

[0114] In one embodiment of this disclosure, the driving partition DA includes each sub-pixel (PIX) of a frame. In other words, the entire frame is driven as a single driving partition DA, so that the driving force of the source driving circuit matches the degree of driving voltage fluctuation during the display of the entire frame, thereby reducing the power consumption of the source driving circuit.

[0115] In another embodiment of this disclosure, a frame is divided into multiple distinct segments, each capable of independent encoding and decoding; the number of driving partitions (DAs) is multiple and corresponds one-to-one with each of the segments. In other words, the driving partitions (DAs) can be determined according to the segments in the frame data transmission process, with each segment serving as a driving partition (DA). This improves the precision of the driving force control of the source driving circuit and further reduces the power consumption of the source driving circuit.

[0116] In another embodiment of this disclosure, any one of the driving partitions DA includes one or more sub-pixel rows. For example, each driving partition DA may include one sub-pixel row. Alternatively, each driving partition DA may include multiple sub-pixel rows, such as 5 to 100 sub-pixel rows. This configuration can also reduce the range of the driving partitions DA and improve the precision of driving force control, thereby reducing the power consumption of the source driving circuit.

[0117] It is understood that in other embodiments of this disclosure, other methods may be used to partition the driver partition DA.

[0118] As follows, Figure 7Taking a display panel PNL as an example, the method for determining the voltage change parameters of the driving partition DA is illustrated. In this example, the driving partition DA is the entire frame of the image. Here, R(i,j) represents the red sub-pixel PIX in the i-th row and j-th column; G(i,j) represents the green sub-pixel PIX in the i-th row and j-th column; B(i,j) represents the blue sub-pixel PIX in the i-th row and j-th column; i and j are both positive integers, with i ranging from 1 to I and j ranging from 1 to J. I is the number of sub-pixel rows in the display panel PNL, and J represents the number of sub-pixel columns in the display panel PNL. In this example, if the color of the sub-pixel PIX is not specified, P(i,j) can be used to represent the sub-pixel PIX in the i-th row and j-th column. In this example, the sub-pixel groups include two types: red-blue sub-pixel groups and green-green sub-pixel groups.

[0119] In this example, the grayscale change ΔG of the sub-pixel group corresponding to each sub-pixel PIX of the driving partition DA can be determined first. The absolute value of the grayscale difference between two adjacent rows can be calculated based on the grayscale of each sub-pixel PIX in each sub-pixel row.

[0120] For example, the sub-pixel group corresponding to P(i,j) in the i-th row and j-th column includes P(i,j) and P(i-1,j), where i is not less than 2. In this sub-pixel group, P(i,j) is the first sub-pixel and P(i-1,j) is the second sub-pixel. The grayscale change ΔG_P(i,j) corresponding to P(i,j) is |G_P(i,j)-G_P(i-1,j)|. Here, G_P(i,j) is the grayscale of P(i,j), and G_P(i-1,j) is the grayscale of P(i-1,j). In this example, the grayscale change of the sub-pixel group corresponding to each sub-pixel PIX in the first sub-pixel row can be omitted, or its own grayscale can be used as the grayscale change of the corresponding sub-pixel group, or the grayscale change of its corresponding sub-pixel group can be set to a constant value (e.g., 0).

[0121] As an example, the sub-pixel group corresponding to B(2,1) includes B(2,1) and R(1,1), and this sub-pixel group belongs to the red-blue sub-pixel group. The grayscale change ΔG_B(2,1) of the sub-pixel group corresponding to B(2,1) is |G_B(2,1)-G_R(1,1)|. G_B(2,1) is the grayscale of B(2,1); G_R(1,1) is the grayscale of R(1,1).

[0122] As an example, the sub-pixel group corresponding to G(2,2) includes G(2,2) and G(1,2), and this sub-pixel group belongs to the green-green sub-pixel group. The grayscale change ΔG_G(2,2) of the sub-pixel group corresponding to G(2,2) is |G_G(2,2)-G_G(1,2)|. G_G(2,2) is the grayscale of G(2,2); G_G(1,2) is the grayscale of G(1,2).

[0123] As an example, the sub-pixel group corresponding to R(2,3) includes R(2,3) and B(1,3), and this sub-pixel group belongs to the red-blue sub-pixel group. The grayscale change ΔG_R(2,3) of the sub-pixel group corresponding to R(2,3) is |G_R(2,3)-G_B(1,3)|. G_R(2,3) is the grayscale of R(2,3); G_B(1,3) is the grayscale of B(1,3). Therefore, the sub-pixel group corresponding to R(2,3) and the sub-pixel group corresponding to B(2,1) belong to the same type of sub-pixel group.

[0124] As an example, the sub-pixel group corresponding to G(2,4) includes G(2,4) and G(1,4), and this sub-pixel group belongs to the green-green sub-pixel group. The grayscale change ΔG_G(2,4) of the sub-pixel group corresponding to G(2,4) is |G_G(2,4)-G_G(1,4)|. G_G(2,4) is the grayscale of G(2,4); G_G(1,4) is the grayscale of G(1,4). Therefore, the sub-pixel group corresponding to G(2,4) and the sub-pixel group corresponding to G(2,2) belong to the same type of sub-pixel group.

[0125] After determining the grayscale change ΔG of the sub-pixel groups corresponding to each sub-pixel PIX in the driving partition DA, the maximum grayscale change of each type of sub-pixel group is determined. For example, by comparison, the maximum grayscale change max_Δ_RB of the red-blue sub-pixel group corresponding to the sub-pixel PIX in the driving partition DA and the maximum grayscale change max_Δ_GG of the green-green sub-pixel group corresponding to the sub-pixel PIX in the driving partition DA are determined. Then, each red-blue sub-pixel group with the maximum grayscale change max_Δ_RB is used as a reference sub-pixel group; and each green-green sub-pixel group with the maximum grayscale change max_Δ_GG is used as a reference sub-pixel group. It is understood that the number of red-blue sub-pixel groups used as reference sub-pixel groups can be one or more; the number of green-green sub-pixel groups used as reference sub-pixel groups can also be one or more.

[0126] Then, based on the grayscale change of each reference sub-pixel group, the driving voltage change of each reference sub-pixel group is determined. Specifically, when calculating the driving voltage change of a reference sub-pixel group, the driving voltage of the first sub-pixel and the driving voltage of the second sub-pixel of the reference sub-pixel group can be calculated separately, and then the absolute value of the difference between the driving voltage of the first sub-pixel and the driving voltage of the second sub-pixel can be used as the driving voltage change of the reference sub-pixel group.

[0127] Then, from the driving voltage changes of each reference sub-pixel group of the driving partition DA, the largest driving voltage change is selected as the voltage change parameter of the driving partition DA.

[0128] As follows, and then Figure 8 Taking a display panel PNL as an example, the method for determining the voltage change parameters of the driving partition DA is illustrated. In this example, the driving partition DA is the entire frame of the image. Here, R(i,j) represents the red sub-pixel PIX in the i-th row and j-th column; G(i,j) represents the green sub-pixel PIX in the i-th row and j-th column; B(i,j) represents the blue sub-pixel PIX in the i-th row and j-th column; i and j are both positive integers, with i ranging from 1 to I and j ranging from 1 to J. I is the number of sub-pixel rows in the display panel PNL, and J represents the number of sub-pixel columns in the display panel PNL. In this example, if the color of the sub-pixel PIX is not specified, P(i,j) can be used to represent the sub-pixel PIX in the i-th row and j-th column. In this example, the sub-pixel groups include three categories: red-red sub-pixel groups, green-green sub-pixel groups, and blue-blue sub-pixel groups.

[0129] In this example, the grayscale change ΔG of the sub-pixel group corresponding to each sub-pixel PIX of the driving partition DA can be determined first. The absolute value of the grayscale difference between two adjacent rows can be calculated based on the grayscale of each sub-pixel PIX in each sub-pixel row.

[0130] For example, the sub-pixel group corresponding to P(i,j) in the i-th row and j-th column includes P(i,j) and P(i-1,j), where i is not less than 2. In this sub-pixel group, P(i,j) is the first sub-pixel and P(i-1,j) is the second sub-pixel. The grayscale change ΔG_P(i,j) corresponding to P(i,j) is |G_P(i,j)-G_P(i-1,j)|. Here, G_P(i,j) is the grayscale of P(i,j), and G_P(i-1,j) is the grayscale of P(i-1,j). In this example, the grayscale change of the sub-pixel group corresponding to each sub-pixel PIX in the first sub-pixel row can be omitted, or its own grayscale can be used as the grayscale change of the corresponding sub-pixel group, or the grayscale change of its corresponding sub-pixel group can be set to a constant value (e.g., 0).

[0131] As an example, the sub-pixel group corresponding to R(2,1) includes R(2,1) and R(1,1), and this sub-pixel group belongs to the red-red sub-pixel group. The grayscale change ΔG_R(2,1) of the sub-pixel group corresponding to R(2,1) is |G_R(2,1)-G_R(1,1)|. G_R(2,1) is the grayscale of R(2,1); G_R(1,1) is the grayscale of R(1,1).

[0132] As an example, the sub-pixel group corresponding to G(2,2) includes G(2,2) and G(1,2), and this sub-pixel group belongs to the green-green sub-pixel group. The grayscale change ΔG_G(2,2) of the sub-pixel group corresponding to G(2,2) is |G_G(2,2)-G_G(1,2)|. G_G(2,2) is the grayscale of G(2,2); G_G(1,2) is the grayscale of G(1,2).

[0133] As an example, the sub-pixel group corresponding to B(2,3) includes B(2,3) and B(1,3), and this sub-pixel group belongs to the blue-blue sub-pixel group. The grayscale change ΔG_B(2,3) of the sub-pixel group corresponding to B(2,3) is |G_B(2,3)-G_B(1,3)|. G_B(2,3) is the grayscale of B(2,3); G_B(1,3) is the grayscale of B(1,3).

[0134] After determining the grayscale change ΔG of the sub-pixel groups corresponding to each sub-pixel PIX in the driving partition DA, the maximum grayscale change of each type of sub-pixel group is determined. For example, by comparison, the maximum grayscale change max_Δ_RR of the red-red sub-pixel group corresponding to the sub-pixel PIX in the driving partition DA, the maximum grayscale change max_Δ_GG of the green-green sub-pixel group corresponding to the sub-pixel PIX in the driving partition DA, and the maximum grayscale change max_Δ_outer region BB of the blue-blue sub-pixel group corresponding to the sub-pixel PIX in the driving partition DA are determined. Then, each red-red sub-pixel group with the maximum grayscale change max_Δ_RR is used as a reference sub-pixel group; each green-green sub-pixel group with the maximum grayscale change max_Δ_GG is used as a reference sub-pixel group; and each blue-blue sub-pixel group with the maximum grayscale change max_Δ_outer region BB is used as a reference sub-pixel group. It is understandable that the number of red sub-pixels serving as the reference sub-pixel group can be one or more; the number of green sub-pixels serving as the reference sub-pixel group can be one or more; and the number of blue sub-pixels serving as the reference sub-pixel group can be one or more.

[0135] Then, based on the grayscale change of each reference sub-pixel group, the driving voltage change of each reference sub-pixel group is determined. Specifically, when calculating the driving voltage change of a reference sub-pixel group, the driving voltage of the first sub-pixel and the driving voltage of the second sub-pixel of the reference sub-pixel group can be calculated separately, and then the absolute value of the difference between the driving voltage of the first sub-pixel and the driving voltage of the second sub-pixel can be used as the driving voltage change of the reference sub-pixel group.

[0136] Then, from the driving voltage changes of each reference sub-pixel group of the driving partition DA, the largest driving voltage change is selected as the voltage change parameter of the driving partition DA.

[0137] In one embodiment of this disclosure, the driving force of each driving partition DA can be determined one by one. The driving force of a driving partition DA can be determined based on the voltage change parameters of any driving partition DA.

[0138] In one example, the driving force of a driving partition DA can be determined as follows: See Figure 9 Based on the voltage change parameters of the drive partition DA, the voltage change parameter range to which the voltage change parameters of the drive partition DA belong is determined; then, based on the voltage change parameter range and the drive force-voltage change parameter range table, the drive force of the drive partition DA is determined. This is equivalent to dividing the drive force into multiple drive force levels, and determining the corresponding level of drive force based on the voltage change parameter range of the drive partition DA, so that the drive voltage change in the drive partition DA matches the drive force, avoiding power waste caused by excessive drive force, and avoiding insufficient drive capability caused by insufficient drive force.

[0139] In another example, the driving force of a driving partition DA can be determined as follows: See Figure 10 Based on the voltage variation parameters of the drive partition DA and the drive force-voltage variation parameter table, a linear interpolation algorithm is used to determine the drive force corresponding to the voltage variation parameters. The drive force-voltage variation parameter table stores multiple sampling points, each sampling point including a drive force and a voltage variation parameter.

[0140] If the voltage change parameter of the driving partition DA happens to match the voltage change parameter of a certain sampling point, then the driving force of that sampling point can be used as the driving force of the driving partition DA.

[0141] If the voltage change parameters of the driving partition DA do not match the voltage change parameters of any sampling point, two sampling points can be determined as reference sampling points based on the voltage change parameters of the driving partition DA. The voltage change parameter of the first reference sampling point is less than that of the driving partition DA, and the voltage change parameter of the second reference sampling point is greater than that of the driving partition DA. The driving force of the driving partition DA can be determined based on the driving force of the first and second reference sampling points, ensuring that the sample points formed by the driving force and voltage change parameters of the driving partition DA are linearly related to the first and second sampling points.

[0142] Of course, in other embodiments of this disclosure, other methods may be used to determine the driving force of the driving partition DA based on the voltage change parameters of the driving partition DA.

[0143] In this embodiment of the disclosure, each sub-pixel of the driving partition DA can be driven according to the driving force of the driving partition DA. Specifically, when driving the driving partition DA, that is, when applying a driving voltage to the sub-pixel of the driving partition DA, the source driving circuit can apply a driving voltage to the data trace DL corresponding to the driving partition DA according to the determined driving force.

[0144] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A driving method for a display panel, characterized in that, include: Determine the voltage variation parameters for each driving partition; the driving partition includes multiple adjacent sub-pixels; The voltage change parameter of the driving partition is the maximum value of the driving voltage change corresponding to each sub-pixel in the driving partition; the driving voltage change corresponding to the sub-pixel is the absolute value of the difference between the driving voltage of the sub-pixel and the driving voltage of the adjacent sub-pixel in the previous row of the same column. The driving force of each driving partition is determined based on the voltage change parameters of each driving partition. Drive each sub-pixel of the driving partition according to the driving force of the driving partition; The voltage variation parameters for determining one of the drive partitions include: Determine the grayscale change of each sub-pixel corresponding to a sub-pixel group in the driving partition; the sub-pixel group includes a first sub-pixel and a second sub-pixel that are adjacent in the same column, and the second sub-pixel is located in the sub-pixel row above the first sub-pixel; the grayscale change of the sub-pixel group is the absolute value of the difference between the grayscale of the first sub-pixel and the grayscale of the second sub-pixel; the sub-pixel group corresponding to the sub-pixel is the sub-pixel group with the sub-pixel as the first sub-pixel; In the sub-pixel groups corresponding to each sub-pixel of the driving partition, the reference sub-pixel groups of each type of sub-pixel group are determined; in the same type of sub-pixel group, the color combination of the sub-pixels of each sub-pixel group is the same; the grayscale change of the reference sub-pixel group of the same type of sub-pixel group is greater than the grayscale change of other sub-pixel groups of the same type of sub-pixel group. Determine the amount of driving voltage change for each of the reference sub-pixel groups; The maximum value of the driving voltage change of each of the reference sub-pixel groups is used as the voltage change parameter of the driving partition.

2. The driving method for the display panel according to claim 1, characterized in that, Determining the amount of driving voltage change for one of the reference sub-pixel groups includes: Based on the grayscale of the first sub-pixel, the grayscale of the second sub-pixel, the gamma correction curve, and the luminance-scale factor curve of the reference sub-pixel group, the driving voltage of the first sub-pixel and the driving voltage of the second sub-pixel are determined. The absolute value of the difference between the driving voltage of the first sub-pixel and the driving voltage of the second sub-pixel is obtained as the driving voltage change of the reference sub-pixel group.

3. The driving method for the display panel according to claim 2, characterized in that, Determining the driving voltage of the first sub-pixel includes: The theoretical driving voltage of the first sub-pixel is determined based on the grayscale of the first sub-pixel and the gamma correction curve corresponding to the first sub-pixel. The driving voltage of the first sub-pixel is determined based on the theoretical driving voltage of the first sub-pixel, the set screen brightness, and the brightness-scale factor curve. Determining the driving voltage of the second sub-pixel includes: The theoretical driving voltage of the second sub-pixel is determined based on the grayscale of the second sub-pixel and the gamma correction curve corresponding to the second sub-pixel. The driving voltage of the second sub-pixel is determined based on the theoretical driving voltage of the second sub-pixel, the set screen brightness, and the brightness-scale factor curve.

4. The driving method for the display panel according to claim 3, characterized in that, The step of determining the driving voltage of the first sub-pixel based on the theoretical driving voltage of the first sub-pixel, setting the image brightness, and the brightness-scale factor curve includes: Determine the scaling factor of the first sub-pixel based on the set screen brightness and brightness-scale factor curve; The product of the theoretical driving voltage and the scaling factor of the first sub-pixel is obtained as the driving voltage of the first sub-pixel. The step of determining the driving voltage of the second sub-pixel based on the theoretical driving voltage of the second sub-pixel, setting the image brightness, and the brightness-scale factor curve includes: The scaling factor of the second sub-pixel is determined based on the set screen brightness and brightness-scale factor curve; The product of the theoretical driving voltage and the scaling factor of the second sub-pixel is obtained as the driving voltage of the second sub-pixel.

5. The driving method for a display panel according to claim 1, characterized in that, The driving partition includes each sub-pixel of a frame.

6. The driving method for a display panel according to claim 1, characterized in that, A frame is divided into multiple different segments, and each segment can be encoded and decoded independently. The number of drive partitions is multiple, and each partition corresponds to one of the multiple shards.

7. The driving method for a display panel according to claim 1, characterized in that, Each of the driving partitions includes one or more subpixel rows.

8. The driving method for a display panel according to claim 1, characterized in that, Determining the driving force of the driving partition based on a voltage change parameter of the driving partition includes: Based on the voltage change parameters of the driving partition, determine the voltage change range to which the voltage change parameters of the driving partition belong; The driving force of the driving zone is determined based on the voltage variation range and the driving force-voltage variation range table.

9. The driving method for a display panel according to claim 1, characterized in that, Determining the driving force of the driving partition based on a voltage change parameter of the driving partition includes: Based on the voltage change parameters of the drive partition and the driving force-voltage change parameter table, a linear interpolation algorithm is used to determine the driving force corresponding to the voltage change parameters of the drive partition.

10. A driving module for a display panel, characterized in that, include: A voltage variation parameter determination circuit is configured to determine the voltage variation parameters of each driving partition; the driving partition includes multiple adjacent sub-pixels. The voltage change parameter of the driving partition is the maximum value of the driving voltage change corresponding to each sub-pixel in the driving partition; the driving voltage change corresponding to the sub-pixel is the absolute value of the difference between the driving voltage of the sub-pixel and the driving voltage of the adjacent sub-pixel in the previous row of the same column; wherein, determining the voltage change parameter of a driving partition includes: determining the grayscale change of the sub-pixel group corresponding to each sub-pixel of the driving partition; the sub-pixel group includes a first sub-pixel and a second sub-pixel adjacent in the same column, the second sub-pixel being located in the sub-pixel row above the first sub-pixel; the grayscale change of the sub-pixel group is the grayscale of the first sub-pixel. The absolute value of the difference between the grayscale of the first sub-pixel and the second sub-pixel; the sub-pixel group corresponding to the sub-pixel is the sub-pixel group with the sub-pixel as the first sub-pixel; determine the reference sub-pixel group of each type of sub-pixel group in the sub-pixel group corresponding to each sub-pixel of the driving partition; in the same type of sub-pixel group, the color combination of the sub-pixels of each sub-pixel group is the same; the grayscale change of the reference sub-pixel group of the same type of sub-pixel group is greater than the grayscale change of other sub-pixel groups of the same type of sub-pixel group; determine the driving voltage change of each reference sub-pixel group; take the maximum value of the driving voltage change of each reference sub-pixel group as the voltage change parameter of the driving partition; A driving force determination circuit is configured to determine the driving force of each driving zone based on voltage variation parameters of each driving zone. The source drive circuit is configured to drive each of the sub-pixels of the drive partition according to the driving force of the drive partition.

11. A display device, characterized in that, It includes the driving module and display panel as described in claim 10, wherein the driving module is electrically connected to the display panel.

12. The display device according to claim 11, characterized in that, The display panel is an OLED display panel, a QLED display panel, a Micro LED display panel, or a Mini LED display panel.

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