Display device, driving module and driving method thereof

Abstract

The display device and the driving method thereof belong to the technical field of display. The driving method of the display device comprises: determining a single-color pixel according to picture data; only a sub-pixel of a single color in each sub-pixel of the single-color pixel emits light; determining a black state voltage compensation value of a corrected sub-pixel of the single-color pixel according to a black state voltage compensation table and a gray scale value of the light-emitting sub-pixel in the single-color pixel; the corrected sub-pixel is located in the single-color pixel and does not emit light; and driving the corrected sub-pixel according to the black state voltage compensation value of the corrected sub-pixel. The display device driving method can improve the display effect of the single-color pixel at low gray scale and low brightness.

Description

Technical Field

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

[0002] OLED (Organic Light Emitting Diode) displays are increasingly used in high-end consumer electronics products; for example, more and more high-end flagship mobile phones are using OLED displays. Consumers are paying more and more attention to the display effect of screens, especially color saturation at low brightness.

[0003] The mainstream process for manufacturing OLED displays is evaporation deposition, which uses a precision metal mask (FMM) to deposit luminescent material into the corresponding pixel apertures. The small aperture spacing on the precision metal mask can easily lead to overlap between organic layers during evaporation, resulting in poor image quality such as missing low-brightness, low-grayscale monochrome displays, and excessive grayscale banding. This can also cause large black patches on the screen in darker environments, negatively impacting the user experience.

[0004] 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

[0005] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a display device and its driving module and driving method to improve the display effect.

[0006] According to a first aspect of this disclosure, a method for driving a display device is provided, comprising:

[0007] Based on the image data, a monochrome pixel is determined; among the sub-pixels of the monochrome pixel, only one color of sub-pixel emits light;

[0008] Based on the black state voltage compensation table and the grayscale value of the luminous sub-pixel in the monochrome pixel, the black state voltage compensation value of the correction sub-pixel of the monochrome pixel is determined; the correction sub-pixel is located in the monochrome pixel and does not emit light;

[0009] The correction sub-pixel is driven according to the black state voltage compensation value of the correction sub-pixel.

[0010] According to one embodiment of this disclosure, in the monochrome pixels, at least a portion of the modified sub-pixels are adjacent to the luminous sub-pixels.

[0011] According to one embodiment of this disclosure, the pixel includes a plurality of second sub-pixels, and a first sub-pixel and a third sub-pixel adjacent to at least one second sub-pixel; when at least one second sub-pixel in the monochrome pixel emits light, at least one of the first sub-pixel and the third sub-pixel serves as the correction sub-pixel.

[0012] According to one embodiment of this disclosure, the pixel includes a first sub-pixel and a third sub-pixel, and includes a second sub-pixel located between the first sub-pixel and the third sub-pixel; in a monochrome pixel where the first sub-pixel is a light-emitting sub-pixel, the third sub-pixel is not a correction sub-pixel of the monochrome pixel; in a monochrome pixel where the third sub-pixel is a light-emitting sub-pixel, the first sub-pixel is not a correction sub-pixel of the monochrome pixel.

[0013] According to one embodiment of this disclosure, the pixel includes at least three different colors of sub-pixels; in the monochrome pixel, the sub-pixels with a color different from the light-emitting sub-pixels are all modified sub-pixels of the monochrome pixel.

[0014] According to one embodiment of this disclosure, the black state voltage compensation table includes multiple sub-compensation tables that correspond one-to-one with the colors of the luminous sub-pixels; each sub-compensation table includes multiple compensation parameter groups, and each compensation parameter group includes the grayscale value of the luminous sub-pixel in the monochrome pixel and the black state voltage compensation value of the correction sub-pixel in the monochrome pixel.

[0015] According to one embodiment of this disclosure, the compensation parameter group of the sub-compensation table includes multiple binding point compensation parameter groups, wherein the binding point compensation parameter group includes the binding point grayscale value of the luminous sub-pixel and the binding point black state voltage compensation value of the correction sub-pixel.

[0016] The determination of the black state voltage compensation value of the corrected sub-pixel includes:

[0017] When determining the black state voltage compensation value of at least some of the modified sub-pixels, the black state voltage compensation value of the modified sub-pixels is determined by linear interpolation based on two binding point compensation parameter groups and the grayscale value of the luminous sub-pixels.

[0018] According to a second aspect of this disclosure, a driving module for a display device is provided, comprising:

[0019] The detection unit is used to determine monochrome pixels based on image data; in each sub-pixel of the monochrome pixel, only one color of sub-pixel emits light.

[0020] The compensation unit is used to determine the black state voltage compensation value of the correction sub-pixel of the monochrome pixel based on the black state voltage compensation table and the grayscale value of the light-emitting sub-pixel in the monochrome pixel; the correction sub-pixel is located in the monochrome pixel and does not emit light;

[0021] A driving unit is configured to drive the correction sub-pixel according to the black state voltage compensation value of the correction sub-pixel.

[0022] According to one embodiment of this disclosure, the drive module further includes:

[0023] A voltage determination unit is used to determine the driving voltage value of the uncorrected sub-pixel based on the grayscale value of the uncorrected sub-pixel.

[0024] The driving unit includes:

[0025] A latch subunit is used to store the black state voltage compensation value of the corrected sub-pixel and the driving voltage value of the uncorrected sub-pixel;

[0026] A conversion subunit is configured to generate an analog driving voltage for the corrected sub-pixel based on the black state voltage compensation value of the corrected sub-pixel, and to generate an analog driving voltage for the uncorrected sub-pixel based on the driving voltage value of the uncorrected sub-pixel.

[0027] According to a third aspect of this disclosure, a display device is provided, including the driving module described above.

[0028] 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

[0029] 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.

[0030] Figure 1 This is a schematic diagram of the structure of a display device in one embodiment of the present disclosure.

[0031] Figure 2 This is a schematic diagram of the structure of the display panel in one embodiment of the present disclosure.

[0032] Figure 3 This is a schematic diagram of the structure of the display panel in one embodiment of the present disclosure.

[0033] Figure 4 This is an example diagram of the equivalent circuit of an OLED display panel in related technologies.

[0034] Figure 5 This image shows the test results of the luminescence performance of the red sub-pixel under different lighting environments in related technologies.

[0035] Figure 6 This is a schematic flowchart of a driving method for a display device in one embodiment of the present disclosure.

[0036] Figure 7 This is a schematic diagram of the structure of a pixel in one embodiment of the present disclosure.

[0037] Figure 8 This is a schematic diagram of the structure of a pixel in one embodiment of the present disclosure.

[0038] Figure 9 This is a schematic diagram of the driving module in one embodiment of the present disclosure.

[0039] Figure 10 This is a schematic diagram illustrating the process of obtaining a first compensation parameter group in a first sub-compensation table in one embodiment of the present disclosure.

[0040] Figure 11 This is a schematic diagram illustrating the process of obtaining a second compensation parameter group in a second sub-compensation table in one embodiment of the present disclosure.

[0041] Figure 12 This is a schematic diagram illustrating the process of obtaining a third compensation parameter group in a third sub-compensation table in one embodiment of the present disclosure. Detailed Implementation

[0042] 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.

[0043] 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.

[0044] 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.

[0045] This disclosure provides a display device and a driving method for the display device to improve the display effect of the display device.

[0046] See Figure 1 The display device includes a display panel PNL and a drive module CTR that drives the display panel PNL. The drive module CTR can drive the display panel PNL to display images based on signals provided by external circuits, such as video signals or image data.

[0047] Optionally, see Figure 2 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. Within the display area AA, the display panel PNL has an array of display units DU, each display unit DU including a sub-pixel PX and a pixel driving circuit PDC that drives the sub-pixel PX. 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.

[0048] In one example, see Figure 2 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 PX according to the written driving voltage.

[0049] In one embodiment of this disclosure, the drive module CTR is configured to drive each pixel row sequentially based on the input image data. When driving any pixel row, the analog drive voltage required for the sub-pixels of that pixel row is applied to the data line DL electrically connected to that sub-pixel.

[0050] In this embodiment of the disclosure, the sub-pixels in the display panel PNL are thin-film self-emissive light-emitting elements (LDs), such as OLED, PLED, QLED, etc. Furthermore, the sub-pixels PX located in the display area AA include sub-pixels PX of various colors; any single pixel can include sub-pixels PX of various colors, so that the pixel can emit colored light through light mixing.

[0051] In one example, see Figure 8 A pixel includes three sub-pixels PX of different colors: first sub-pixel PR, second sub-pixel PG, and third sub-pixel PB. For example, a pixel may include first sub-pixel PR, second sub-pixel PG, and third sub-pixel PB arranged sequentially along the row direction DH.

[0052] In another example, see Figure 7 A pixel includes at least one first sub-pixel PR, multiple second sub-pixels PG, and at least one third sub-pixel PB, etc., and multiple sub-pixels PX; for example, a pixel includes a first sub-pixel PR, a second sub-pixel PG, a third sub-pixel PB, and a second sub-pixel PG arranged sequentially along the row direction DH. Furthermore, the light-emitting area of ​​the second sub-pixel PG is smaller than that of the first sub-pixel PR and the third sub-pixel PB.

[0053] In the example above, the pixel includes three sub-pixels PX of different colors: a first sub-pixel PR, a second sub-pixel PG, and a third sub-pixel PB. It is understood that in other embodiments of this disclosure, the pixel may also include only two sub-pixels PX of different colors, or it may include four or more sub-pixels PX of different colors.

[0054] In one example, the first sub-pixel PR is a red sub-pixel used to emit red light.

[0055] In one example, the second sub-pixel PG is a green sub-pixel used to emit green light.

[0056] In one example, the third sub-pixel PB is a blue sub-pixel used to emit blue light.

[0057] It is understandable that any one of the first sub-pixel PR, the second sub-pixel PG, and the third sub-pixel PB can also be a sub-pixel PX that emits other colors of light, rather than being limited to red, green, or blue sub-pixels. It is also understandable that, if necessary, a pixel may include sub-pixels PX used to emit other colors of light; for example, some sub-pixels on a display panel PNL can be yellow sub-pixels for emitting yellow light, cyan sub-pixels for emitting cyan light, white sub-pixels for emitting white light, and so on.

[0058] See Figure 3 In one embodiment of this disclosure, the display panel PNL may include an SBT, a driving layer DRL, and a pixel layer PXL stacked sequentially. The pixel layer PXL contains light-emitting elements (LDs) that serve as sub-pixels PX, and the driving layer DRL drives the sub-pixels PX in the pixel layer PXL. The driving layer DRL may drive each sub-pixel PX using either an active driving method or a passive driving method.

[0059] As an example, see Figure 3 The driving layer DRL is provided with pixel driving circuits for driving sub-pixels PX; each sub-pixel PX can emit light under the drive of the pixel driving circuit 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 PXL away from the driving layer DRL, which can encapsulate and protect the pixel layer PXL.

[0060] Optionally, the 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 SBT material can be glass materials such as soda-lime glass, quartz glass, and sapphire glass. In other embodiments of this disclosure, the SBT material 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 SBT can also be a flexible substrate; for example, the SBT material may include polyimide.

[0061] Optionally, in the driving layer DRL, any pixel driving circuit 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.

[0062] 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.

[0063] 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 SBT and the pixel layer PXL. 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; other layers may also be used. 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 (as part of the active layer), 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, drive 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 layers SCL and SBT. As needed, any one of the aforementioned semiconductor layers SCL, gate layers GT, source / drain metal layers 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 adaptively increased or decreased, or new insulating film layers may be added as needed.

[0064] Optionally, the drive 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 SBT, in order to protect the source / drain metal layer SD.

[0065] As an example, see Figure 3 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.

[0066] Optional, see Figure 3The pixel layer PXL may include a pixel electrode layer PEL, a pixel definition layer PDL, an emissive light-emitting 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 pixel definition layer PDL has multiple through-holes corresponding to the multiple pixel electrodes, with each pixel hole 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 area of ​​the pixel electrode, so that the pixel definition layer PDL can effectively define the actual effective area of ​​the pixel electrode (the area directly connected to the emissive light-emitting layer EFL), thereby defining the light-emitting area and light-emitting region of the sub-pixel PX. The common electrode layer COML covers the emissive light-emitting layer EFL as a common electrode. The pixel electrodes and the common electrode layer COML provide electrons, holes, and other charge carriers to the emissive light-emitting layer EFL, causing the emissive light-emitting layer EFL to emit light. The portion of the emissive light-emitting layer EFL located between the pixel electrodes and the common electrode layer COML can serve as the light-emitting functional unit of the sub-pixel PX. A pixel electrode, a common electrode layer (COML), and a light-emitting functional unit form a light-emitting element (LD) that serves as a sub-pixel (PX). One of the pixel electrode and the common electrode layer (COML) serves as the anode of the sub-pixel (PX), and the other serves as the cathode of the sub-pixel (PX).

[0067] In this example, the display panel PNL is an OLED display panel. The light-emitting functional layer (EFL) 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, and particularly may be a thermally activated delayed fluorescence material.

[0068] In one example, see Figure 3The display panel PNL may also be provided with a thin-film encapsulation layer (TFE). The TFE can be disposed on the surface of the pixel layer PXL away from the SBT, and may 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 PXL and causing material aging. Optionally, the edge of the inorganic encapsulation layer may 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 may be located between the edge of the display area and the edge of the inorganic encapsulation layer. For example, the TFE includes a first inorganic encapsulation layer CVD1, an organic encapsulation layer IJP, and a second inorganic encapsulation layer CVD2, sequentially stacked on the side of the pixel layer PXL away from the 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.

[0069] In some embodiments of this disclosure, see Figure 3 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 pixel layer PXL, so that the display panel PNL has touch function.

[0070] Figure 4 This is an example diagram of the equivalent circuit of an OLED display panel in related technologies. See also... Figure 4 The display panel includes OLEDs arranged in an array (e.g., Figure 4 The system includes OLED1, OLED2, OLED3, etc., and pixel driving circuits corresponding to each OLED. OLEDs emit light under the drive of these pixel driving circuits. When the light-emitting functional layers (EFLs) of adjacent OLEDs overlap, the outputs of the two pixel driving circuits are electrically connected through the EFLs of the OLEDs, forming a leakage path. When one OLED displays a low grayscale value and the adjacent OLED does not emit light, the driving current generated by the pixel driving circuit of that OLED will be diverted to the adjacent OLED, resulting in insufficient brightness of that OLED.

[0071] Figure 5 This image shows the test results of the luminous performance of the red sub-pixel under different lighting environments in related technologies. (See also...) Figure 5 When all other subpixels around the red subpixel are lit, the red subpixel displays normally; when none of the subpixels around the red subpixel are lit, the red subpixel faces crosstalk, resulting in a lack of low grayscale values ​​in low brightness.

[0072] In related technologies, various approaches to address this problem face significant challenges. One improvement is to increase the spacing between adjacent sub-pixel apertures, but this results in a substantial loss of aperture ratio. Another approach is to modify the shape of the pixel definition layer to increase the resistance of the lateral leakage path, but the improvement is limited.

[0073] Therefore, this disclosure provides a driving method for the display device to improve the problem of insufficient light emission brightness faced by at least some sub-pixels. See also Figure 6 The driving method for the display device provided in this disclosure includes:

[0074] Step S110: Based on the image data, determine the monochrome pixel; in each sub-pixel of the monochrome pixel, only one color of sub-pixel emits light;

[0075] Step S120: Determine the black state voltage compensation value of the correction sub-pixel according to the black state voltage compensation table; the correction sub-pixel is located in the monochrome pixel and does not emit light;

[0076] Step S130: Drive the corrected sub-pixel according to the black state voltage compensation value of the corrected sub-pixel.

[0077] In this embodiment, monochrome pixels can be detected first. Because only one color sub-pixel emits light while other sub-pixels do not, these monochrome pixels have a high risk of crosstalk at low brightness and low grayscale values. The emitting sub-pixels of these monochrome pixels are prone to not emitting light or emitting light but with insufficient brightness. In step S110, these high-risk monochrome pixels can be identified by pattern detection of the image data. In step S120, targeted compensation can be performed on the high-risk monochrome pixels. Specifically, the black state voltage value of the non-emitting correction sub-pixels in the monochrome pixels is compensated, and then the black state voltage of the driving correction sub-pixels is compensated in step S130. On the one hand, the driving method of this disclosure does not synchronously adjust the black state voltage value of each sub-pixel, thereby avoiding improper adjustment of the black state voltage value that could cause some sub-pixels with a grayscale value of 0 to eventually emit light. On the other hand, the driving method disclosed herein performs targeted compensation for the black state voltage of the correction sub-pixel based on the grayscale value of the light-emitting sub-pixel in the monochrome pixel, which can improve the accuracy of the black state voltage compensation of the correction sub-pixel, thereby ensuring the light emission accuracy of the light-emitting sub-pixel as much as possible while ensuring that the correction sub-pixel does not emit light.

[0078] In step S110, the image data includes the grayscale values ​​of each sub-pixel PX. Based on the grayscale values ​​of each sub-pixel PX of a pixel, it can be determined whether the pixel is a monochrome pixel.

[0079] Optionally, the driver module CTR can receive initial screen data provided by an external system (such as a host, motherboard, or graphics card), for example, via an HDMI, DP, DVI, or VGA interface. In some examples, the initial screen data and the screen data can be the same; for example, the initial screen data is used directly as screen data without any processing. In other examples, the initial screen data and the screen data are different, and the initial screen data is processed to generate the screen data.

[0080] In one example, if the arrangement of the grayscale values ​​of the subpixels in the initial image data is different from the arrangement of the subpixels on the display panel PNL, then the image data can be generated according to the preset algorithm based on the initial image data.

[0081] In one example, the CTR driving module may have a compensation unit that can compensate for the grayscale values ​​of subpixels based on the initial image data, such as increasing or decreasing the grayscale values ​​of some subpixels.

[0082] In one embodiment of this disclosure, see Figure 9 The CTR drive module has a detection unit that is used to determine monochrome pixels based on image data.

[0083] In one example, the detection unit can read the image data line by line, for example, acquiring the grayscale values ​​of a row of sub-pixels; then, it can determine whether each pixel in that row of graphic sub-pixels is a monochrome pixel. Of course, in other embodiments of this disclosure, the detection unit can also use other methods to determine monochrome pixels. For example, the detection unit can simultaneously read the grayscale values ​​of multiple rows of sub-pixels. As another example, the detection unit can simultaneously determine whether multiple pixels are monochrome pixels. Yet another example, the detection unit can determine monochrome pixels during the process of reading the image data, without waiting for the grayscale values ​​of one or more rows of sub-pixels to be read before determining whether a pixel is a monochrome pixel.

[0084] In one example, the driving module CTR includes a microprocessor (MCU) and a source driving circuit (SIC). The MCU loads image data into the SIC. The SIC has a detection unit that performs image detection on the image data read from the MCU to obtain monochrome pixels. Then, the SIC can drive each sub-pixel (PX) according to the image data, for example, by determining the driving voltage value of each sub-pixel PX based on its grayscale value, and converting the determined driving voltage value into an analog driving voltage, which is then applied to the data line DL electrically connected to the sub-pixel PX. When the SIC determines a monochrome pixel in the image data, it can generate an analog driving voltage for the modified sub-pixel in that monochrome pixel according to the methods shown in steps S120 and S130 of this embodiment.

[0085] In this embodiment, the driving voltage value is a digital numerical value that represents the mathematical value of the driving voltage. The analog driving voltage is an analog voltage with a specific electromotive force. The driving module CTR of this embodiment, especially the source driving circuit SiC on the driving module CTR, can perform digital-to-analog conversion based on the driving voltage value to generate an analog driving voltage. In this embodiment, when a sub-pixel PX does not emit light, the grayscale value of that sub-pixel PX is 0. Generally, to ensure that sub-pixels PX with a grayscale value of 0 do not emit light to improve the contrast of the display panel PNL, the actual driving voltage used for sub-pixels PX with a grayscale value of 0 has a larger voltage difference than the actual driving voltage used for sub-pixels PX with a grayscale value of 1. In this embodiment, the analog driving voltage applied when the grayscale value of a sub-pixel PX is 0 is called the analog black-state voltage, and the driving voltage value corresponding to the grayscale value of the sub-pixel PX is called the black-state voltage value. It can be understood that the analog black-state voltage is a type of analog driving voltage, and the black-state voltage value is a type of driving voltage value.

[0086] In this embodiment of the disclosure, the driving module CTR determines whether a sub-pixel emits light based on its grayscale value. For example, when the grayscale value of a sub-pixel is 0, it is determined that the sub-pixel does not emit light. When the grayscale value of a sub-pixel is not 0, it is determined that the sub-pixel emits light.

[0087] In this embodiment, whether a pixel is a monochrome pixel can be determined based on the grayscale values ​​of its sub-pixels PX. If a pixel contains sub-pixels PX with a non-zero grayscale value, and all sub-pixels PX with non-zero grayscale values ​​are of the same color, then the pixel is a monochrome pixel. That is, a monochrome pixel has one and only one color of sub-pixels PX emitting light.

[0088] Taking a pixel consisting of three sub-pixels PX arranged sequentially as an example, we will illustrate a monochrome pixel. If the grayscale value of the first sub-pixel PR is not 0, and the grayscale values ​​of the second sub-pixel PG and the third sub-pixel PB are both 0, then the pixel is a monochrome pixel. Similarly, if the grayscale value of the second sub-pixel PG is not 0, and the grayscale values ​​of the first sub-pixel PR and the third sub-pixel PB are both 0, then the pixel is a monochrome pixel.

[0089] Taking a pixel consisting of four sub-pixels PX arranged sequentially as an example, namely, first sub-pixel PR, second sub-pixel PG, third sub-pixel PB, and second sub-pixel PG, a monochrome pixel is illustrated below. If the grayscale value of the first sub-pixel PR is not 0, and the grayscale values ​​of the second sub-pixel PG and the third sub-pixel PB are both 0, then the pixel is a monochrome pixel. If the grayscale value of the third sub-pixel PB is not 0, and the grayscale values ​​of the first sub-pixel PR and the second sub-pixel PG are both 0, then the pixel is a monochrome pixel. If the grayscale value of one second sub-pixel PG is not 0, and the grayscale values ​​of the first sub-pixel PR, the third sub-pixel PB, and another second sub-pixel PG are all 0, then the pixel is a monochrome pixel. If the grayscale values ​​of both second sub-pixels PG are not 0, and the grayscale values ​​of the first sub-pixel PR and the third sub-pixel PB are both 0, then the pixel is a monochrome pixel.

[0090] In step S120, the black state voltage compensation value of the correction sub-pixel of the monochrome pixel can be determined based on the black state voltage compensation table and the grayscale value of the luminous sub-pixel in the monochrome pixel. For example, the driving module CTR can determine the black state voltage compensation value of the correction sub-pixel of the monochrome pixel based on the black state voltage compensation table and the grayscale value of the luminous sub-pixel in the monochrome pixel.

[0091] In one example, see Figure 9 The CTR driving module has a compensation unit, which is used to determine the black state voltage compensation value of the correction sub-pixel according to the black state voltage compensation table.

[0092] In one embodiment of this disclosure, at least some of the modified sub-pixels are adjacent to the luminous sub-pixels in the monochrome pixels. Since non-luminous sub-pixels among adjacent sub-pixels can easily lead to insufficient luminous brightness or even no luminous brightness of the luminous sub-pixels, non-luminous sub-pixels adjacent to the luminous sub-pixels can be used as modified sub-pixels, and the black state voltage of the modified sub-pixels can be compensated to increase the leakage current of the pixel driving circuit PDC corresponding to the modified sub-pixels when it is turned off, thereby reducing the shunting effect on the pixel driving circuit PDC of the luminous sub-pixels and improving the accuracy of the luminous brightness of the luminous sub-pixels.

[0093] In one example, within a monochrome pixel, the correction sub-pixel refers to the sub-pixel PX adjacent to the luminous sub-pixel; non-luminous sub-pixels not adjacent to the luminous sub-pixel may not be considered correction sub-pixels. This improves the accuracy of black-state voltage compensation.

[0094] For example, see Figure 7 A monochrome pixel comprises, in sequence, a first subpixel PR, a second subpixel PG1, a third subpixel PB, and a second subpixel PG2. If the first subpixel PR is a luminous subpixel, then the second subpixel PG1 is a modifier subpixel. If the second subpixel PG1 is a luminous subpixel, then the first subpixel PR and the third subpixel PB are modifier subpixels. If the third subpixel PB is a luminous subpixel, then the second subpixels PG1 and the second subpixel PG2 are modifier subpixels. If the second subpixel PG2 is a luminous subpixel, then the third subpixel PB is a modifier subpixel.

[0095] In another example, within a monochrome pixel, when a non-illuminating sub-pixel is adjacent to an illuminating sub-pixel, all sub-pixels PX of the same color as the non-illuminating sub-pixel within that monochrome pixel are considered corrected sub-pixels. This reduces the size of the black-state voltage compensation table, simplifies the driving method, lowers the cost of the register storing the black-state voltage compensation table, and reduces the power consumption of the driving module CTR.

[0096] For example, see Figure 7 A monochrome pixel comprises, in sequence, a first subpixel PR, a second subpixel PG1, a third subpixel PB, and a second subpixel PG2. If the first subpixel PR is a luminous subpixel, then the second subpixels PG1 and PG2 are both correction subpixels. If the second subpixel PG1 is a luminous subpixel, then the first subpixel PR and the third subpixel PB are correction subpixels. If the third subpixel PB is a luminous subpixel, then the second subpixels PG1 and PG2 are both correction subpixels. If the second subpixel PG2 is a luminous subpixel, then the third subpixel PB is a correction subpixel.

[0097] In one embodiment of this disclosure, the pixel includes a plurality of second sub-pixels PG, and a first sub-pixel PR and a third sub-pixel PB adjacent to at least one second sub-pixel PG; when at least one second sub-pixel PG in the monochrome pixel emits light, at least one of the first sub-pixel PR and the third sub-pixel PB serves as the correction sub-pixel. Further, the first sub-pixel PR or the third sub-pixel PB adjacent to the emitted second sub-pixel PG is a correction sub-pixel, and the first sub-pixel PR or the third sub-pixel PB not adjacent to the emitted second sub-pixel PG may or may not serve as a correction sub-pixel.

[0098] In one example, see Figure 7 A monochrome pixel consists of a first sub-pixel PR, a second sub-pixel PG1, a third sub-pixel PB, and a second sub-pixel PG2 arranged in sequence. If the second sub-pixel PG2 is a luminous sub-pixel, then the third sub-pixel PB is a correction sub-pixel.

[0099] In another example, see Figure 7 The monochrome pixel includes a first sub-pixel PR, a second sub-pixel PG1, a third sub-pixel PB, and a second sub-pixel PG2 arranged in sequence. If the second sub-pixel PG2 is a luminous sub-pixel, then the first sub-pixel PR and the third sub-pixel PB are both correction sub-pixels.

[0100] In one embodiment of this disclosure, see Figure 7 and Figure 8 The pixel includes a first sub-pixel PR and a third sub-pixel PB, and a second sub-pixel PG located between the first sub-pixel PR and the third sub-pixel PB; in a monochrome pixel where the first sub-pixel PR is a light-emitting sub-pixel, the third sub-pixel PB is not used as a correction sub-pixel of the monochrome pixel; in a monochrome pixel where the third sub-pixel PB is a light-emitting sub-pixel, the first sub-pixel PR is not used as a correction sub-pixel of the monochrome pixel. This reduces the size of the black-state voltage compensation table and simplifies the driving method, lowers the cost of the register storing the black-state voltage compensation table, and reduces the power consumption of the driving module CTR.

[0101] In another embodiment of this disclosure, the pixel includes at least three sub-pixels of different colors; all sub-pixels in the monochrome pixel that are different in color from the luminous sub-pixels are the correction sub-pixels. This further improves the compensation accuracy of the monochrome pixels and enhances the luminous accuracy of the monochrome pixels.

[0102] For example, see Figure 7 A monochrome pixel comprises, in sequence, a first sub-pixel PR, a second sub-pixel PG1, a third sub-pixel PB, and a second sub-pixel PG2. If the first sub-pixel PR is a luminous sub-pixel, then the second sub-pixels PG1, PG2, and PB are all correction sub-pixels. If the second sub-pixel PG1 is a luminous sub-pixel, then the first sub-pixel PR and the third sub-pixel PB are all correction sub-pixels. If the third sub-pixel PB is a luminous sub-pixel, then the second sub-pixels PG1, PG2, and PR are all correction sub-pixels. If the second sub-pixel PG2 is a luminous sub-pixel, then the first sub-pixel PR, the second sub-pixel PG1, and PG2 are all correction sub-pixels.

[0103] In one embodiment of this disclosure, the black state voltage compensation table includes multiple sub-compensation tables that correspond one-to-one with the colors of the luminous sub-pixels; each sub-compensation table includes multiple compensation parameter groups for the luminous sub-pixels of the corresponding colors, and each compensation parameter group includes the grayscale value of the luminous sub-pixels in the monochrome pixel and the black state voltage compensation value of the correction sub-pixels in the monochrome pixel.

[0104] Optionally, the drive module CTR is equipped with a compensation parameter group register for storing the black-state voltage compensation table. The compensation unit can determine the black-state voltage compensation value of the corrected sub-pixel by reading the compensation parameter group in the compensation parameter group register.

[0105] In one example, the grayscale value of the luminous sub-pixel in the compensation parameter group can be the grayscale value recorded in the compensation parameter group register, or it can be a specific value recorded in the compensation parameter group register that corresponds to the grayscale value, such as a number or code.

[0106] In another example, the grayscale value of the luminescent sub-pixel in the compensation parameter group is not recorded in the compensation parameter group register, but the grayscale value is associated with a specific address, specifically with the black-state voltage compensation value of the correction sub-pixel. For example, the compensation unit has an index table that records the grayscale value of the luminescent sub-pixel and the address of the black-state voltage compensation value of the corresponding correction sub-pixel. When a compensation parameter group needs to be called, the address corresponding to the grayscale value of the luminescent sub-pixel can be looked up in the index table, and data can be read according to the looked-up address. Optionally, the index table can be presented as a form executed by a program or as a circuit implemented through hardware mapping.

[0107] In one example, the black state voltage compensation value of the corrected sub-pixel is the final black state voltage value of the corrected sub-pixel, and the driving module CTR converts the black state voltage compensation value into the corresponding analog black state voltage (i.e., analog driving voltage). Of course, in other embodiments of this disclosure, the black state voltage compensation value of the corrected sub-pixel can also be the difference between the final black state voltage value and the preset black state voltage value (the black state voltage value of a non-corrected sub-pixel of the same color); the compensation unit can determine the final black state voltage value based on the black state voltage compensation value of the corrected sub-pixel and the preset black state voltage value.

[0108] In one embodiment of this disclosure, a pixel includes a first sub-pixel PR, a second sub-pixel PG, a third sub-pixel PB, and a second sub-pixel PG arranged in sequence, or a pixel includes a first sub-pixel PR, a second sub-pixel PG, and a third sub-pixel PB arranged in sequence. Therefore, the black-state voltage compensation table includes a first sub-compensation table corresponding to the first sub-pixel PR, a second sub-compensation table corresponding to the second sub-pixel PG, and a third sub-compensation table corresponding to the third sub-pixel PB.

[0109] The first sub-compensation table is applicable when the first sub-pixel PR in a monochrome pixel is a light-emitting sub-pixel. This first sub-compensation table includes multiple first compensation parameter groups, each including the grayscale value of the first sub-pixel PR and the black-state voltage compensation value of the correction sub-pixel. The black-state voltage compensation value of the correction sub-pixel in the monochrome pixel can be determined based on the grayscale value of the first sub-pixel PR.

[0110] In one example, the second sub-pixel PG is a modified sub-pixel, and the compensation unit can determine the black state voltage compensation value of the second sub-pixel PG based on the grayscale value of the first sub-pixel PR and the first sub-compensation table.

[0111] In another example, the second sub-pixel PG and the third sub-pixel PB are both modified sub-pixels. Then the compensation unit can determine the black state voltage compensation value of the second sub-pixel PG and the black state voltage compensation value of the third sub-pixel PB based on the grayscale value of the first sub-pixel PR and the first sub-compensation table.

[0112] The second sub-compensation table is applicable when the second sub-pixel PG in a monochrome pixel is a luminous sub-pixel. This second sub-compensation table includes multiple second compensation parameter groups, each including the grayscale value of the second sub-pixel PG and the black-state voltage compensation value of the correction sub-pixel. The black-state voltage compensation value of the correction sub-pixel in the monochrome pixel can be determined based on the grayscale value of the second sub-pixel PG.

[0113] In one example, the first sub-pixel PR and the third sub-pixel PB are both modified sub-pixels. Then, the compensation unit can determine the black state voltage compensation value of the first sub-pixel PR and the black state voltage compensation value of the third sub-pixel PB based on the grayscale value of the second sub-pixel PG and the second sub-compensation table.

[0114] The third sub-compensation table is applicable when the third sub-pixel PB in a monochrome pixel is a luminous sub-pixel. This table includes multiple third compensation parameter groups, each containing the grayscale value of the third sub-pixel PB and the black-state voltage compensation value of the correction sub-pixel. The black-state voltage compensation value of the correction sub-pixel can be determined based on the grayscale value of the third sub-pixel PB.

[0115] In one example, the second sub-pixel PG is a modified sub-pixel. Then, the black state voltage compensation value of the second sub-pixel PG can be determined based on the grayscale value of the third sub-pixel PB and the third sub-compensation table.

[0116] In another example, if the second sub-pixel PG and the first sub-pixel PR are both modified sub-pixels, then the black state voltage compensation value of the second sub-pixel PG and the black state voltage compensation value of the first sub-pixel PR can be determined based on the grayscale value of the third sub-pixel PB and the third sub-compensation table.

[0117] In one embodiment of this disclosure, any sub-compensation table includes the black-state voltage compensation value of the correction sub-pixel corresponding to each grayscale value of the luminescent sub-pixel. The compensation unit is configured to directly read the black-state voltage compensation value of the correction sub-pixel from the corresponding sub-compensation table based on the grayscale value of the luminescent sub-pixel of the monochrome pixel.

[0118] Table 1 shows a first example of a first sub-compensation table. In this first example, the second sub-pixel PG and the third sub-pixel PB are both modified sub-pixels. In this example, the grayscale value range of the sub-pixels is 0–255. Referring to Table 1, the first sub-compensation table includes the grayscale value G of the first sub-pixel PR. R(i) The corresponding black state voltage compensation value V of the second sub-pixel PG G(0_i) And the black state voltage compensation value V of the third sub-pixel PB B(0_i) Where i is the grayscale value of the first sub-pixel PR, which is any positive integer from 1 to 255. It can be understood that in this example, the grayscale value of sub-pixel PX is an 8-bit grayscale value. In other examples, the grayscale value of sub-pixel PX can also be in a range other than 0 to 255, such as 0 to 128, 0 to 512, or 0 to 1024, etc. In Table 1, the grayscale value G... R(i) Black-state voltage compensation value V G(0_i) Black-state voltage compensation value V B(0_i) Together, they form a first compensation parameter group for the first sub-compensation table. For example, the grayscale value G of the first sub-pixel PR. R(1) The black state voltage compensation value of the second sub-pixel PG is 1, and the value of V is 1. G(0_1) The black state voltage compensation value of the third sub-pixel PB is V. B(0_1) The grayscale value G of the first sub-pixel PR R(2) The value is 2, and the black state voltage compensation value of the second sub-pixel PG is V. G(0_2) The black state voltage compensation value of the third sub-pixel PB is V. B(0_2) The grayscale value G of the first sub-pixel PR R(3) The value is 3, and the black state voltage compensation value of the second sub-pixel PG is V. G(0_3) The black state voltage compensation value of the third sub-pixel PB is V. B(0_3) The grayscale value G of the first sub-pixel PR R(4) The value is 4, and the black state voltage compensation value of the second sub-pixel PG is V. G(0_4) The black state voltage compensation value of the third sub-pixel PB is V. B(0_4) Similarly, the grayscale value G of the first sub-pixel PR R(254 The value is 254, and the black state voltage compensation value of the second sub-pixel PG is V. G(0_254) The black state voltage compensation value V of the third sub-pixel PB B(0_254) The grayscale value G of the first sub-pixel PRR(255) The value is 255, and the black state voltage compensation value of the second sub-pixel PG is V. G(0_255) The black state voltage compensation value of the third sub-pixel PB is V. B(0_255) .

[0119] Table 1: First Example of the First Sub-Compensation Table

[0120]

[0121] In this first example, the driving voltage V of the first sub-pixel PR at grayscale value i R(i) It can be stored in other registers instead of the compensation parameter group register. For example, see Figure 9 The driving module CTR also includes a voltage determination unit, which determines the driving voltage value of a sub-pixel PX based on its grayscale value. When a sub-pixel PX emits light, or when a sub-pixel PX does not emit light and is not a correction sub-pixel, the voltage determination unit determines the driving voltage value of the sub-pixel PX based on its grayscale value. When a sub-pixel PX is a correction sub-pixel, the compensation unit determines the black-state voltage compensation value of the correction sub-pixel based on the grayscale value of the emitting sub-pixels in the monochrome pixel containing the correction sub-pixel. This reduces the capacity of the compensation parameter group register in the compensation unit, thereby helping to lower the cost of the driving module CTR.

[0122] Table 2 shows a second example of the first sub-compensation table. Compared to the first example's first sub-compensation table, this second example's first sub-compensation table also includes the driving voltage value of the first sub-pixel PR at different gray levels, that is, the driving voltage value V of the first sub-pixel PR at gray level i. R(i) In this second example, the compensation unit can obtain the driving voltage value of the first sub-pixel PR, which is a luminous sub-pixel in the monochrome pixel, by looking up the first sub-compensation table. Thus, when the detection unit determines a monochrome pixel luminous from the first sub-pixel PR, the compensation unit can determine the driving voltage values ​​of the luminous sub-pixel and the correction sub-pixel of that monochrome pixel (i.e., the driving voltage value of the first sub-pixel PR, the black state voltage compensation value of the second sub-pixel PG, and the black state voltage compensation value of the third sub-pixel PB) according to the first sub-compensation table. When the pixel structure is as follows... Figure 7 or Figure 8 When the pixel includes only three different colored sub-pixels PX: the first sub-pixel PR, the second sub-pixel PG, and the third sub-pixel PB, the compensation unit can determine the driving voltage value of each sub-pixel PX in the monochrome pixel emitting light from the first sub-pixel PR according to the first sub-compensation table in the second example.

[0123] Table 2: Second example of the first sub-compensation table

[0124]

[0125]

[0126] In the first and second examples of the first sub-compensation table, the corrected sub-pixels of the monochromatic pixels emitting light from the first sub-pixel PR are the second sub-pixel PG and the third sub-pixel PB. The first sub-compensation table may also include other examples, such as one where the corrected sub-pixels of the monochromatic pixels emitting light from the first sub-pixel PR include only the second sub-pixel PG.

[0127] Table 3 shows a third example of the first sub-compensation table. Referring to Table 3, the third example of the first sub-compensation table is similar to the first example, but does not include the black-state voltage compensation value of the third sub-pixel PB. After the detection unit determines the monochromatic pixel emitting light from the first sub-pixel PR, the compensation unit determines the black-state voltage compensation value of the second sub-pixel PG based on the grayscale value of the first sub-pixel PR. The voltage determination unit determines the driving voltage value of the first sub-pixel PR based on its grayscale value, and the voltage determination unit determines the black-state voltage value V of the third sub-pixel PB based on its grayscale value (which is 0). B0 Thus, compared to the first example of the first sub-compensation table, the third type of first sub-compensation table requires fewer registers.

[0128] Table 3: Third Example of the First Sub-Compensation Table

[0129]

[0130] Table 4 shows a fourth example of the first sub-compensation table. Referring to Table 4, the fourth example of the first sub-compensation table is similar to the second example, but does not include the black state voltage compensation value of the third sub-pixel PB. After the detection unit determines the monochromatic pixel emitting light from the first sub-pixel PR, the compensation unit determines the black state voltage compensation value of the second sub-pixel PG and the driving voltage value of the first sub-pixel PR based on the grayscale value of the first sub-pixel PR. The voltage determination unit determines the black state voltage value V of the third sub-pixel PB based on the grayscale value of the third sub-pixel PB (which is 0). B0 Thus, compared to the second example of the first sub-compensation table, the fourth type of first sub-compensation table requires fewer registers.

[0131] Table 4: Fourth Example of the First Sub-Compensation Table

[0132]

[0133] In the first to fourth examples of the first sub-compensation table, the first sub-compensation table includes the black-state voltage compensation value of the corrected sub-pixel corresponding to any non-zero grayscale value of the first sub-pixel PR (i.e., i is any integer from 1 to 255). Once the grayscale value of the first sub-pixel PR is determined, the black-state voltage compensation value of the corrected sub-pixel can be directly obtained by looking up the first sub-compensation table.

[0134] The compensation unit of this disclosure can also be configured in other ways, such that the first sub-compensation table only includes a portion of the grayscale values ​​of the first sub-pixel PR and the corresponding black-state voltage compensation values ​​of the correction sub-pixels. For example, the first sub-compensation table only includes 8 to 30 different first compensation parameter groups, and the grayscale values ​​of the first sub-pixel PR, which are luminescent sub-pixels, are different in any two first compensation parameter groups. Thus, the black-state voltage compensation values ​​of the correction sub-pixels corresponding to at least a portion of the grayscale values ​​of the first sub-pixels PR cannot be directly determined by looking up the first sub-compensation table. In the embodiments of this disclosure, these first compensation parameter groups of the first sub-compensation table can be referred to as first binding point compensation parameter groups; in the first binding point compensation parameter groups, the grayscale values ​​of the first sub-pixel PR are referred to as the binding point grayscale values ​​of the first sub-pixel PR, and the black-state voltage compensation values ​​of the correction sub-pixels are referred to as the binding point compensation values ​​of the correction sub-pixels.

[0135] Optionally, the compensation unit is configured to determine the black state voltage compensation value of the corrected sub-pixel based on the grayscale value of the first sub-pixel PR using the following method: firstly, obtain at least two first binding point compensation parameter groups based on the grayscale value of the first sub-pixel PR, wherein the grayscale value of the first sub-pixel PR is within the range of the binding point grayscale values ​​of the first sub-pixel PR in the two first binding point compensation parameter groups; then, based on the grayscale value of the first sub-pixel PR, the binding point grayscale values ​​of the first sub-pixel PR in the two first binding point compensation parameter groups, and the binding point compensation value of the corrected sub-pixel in the two first binding point compensation parameter groups, determine the black state voltage compensation value of the corrected sub-pixel using a linear interpolation algorithm, or determine the black state voltage compensation value of the corrected sub-pixel using other algorithms.

[0136] As described above, an exemplary first sub-compensation table is provided for the monochrome pixel emitting light from the first sub-pixel PR. In these exemplary descriptions, the correction sub-pixel in the first sub-compensation table can be only the second sub-pixel PG, or it can be the third sub-pixel PB and the second sub-pixel PG; the first sub-compensation table can be used to determine the driving voltage value of the first sub-pixel PR based on the grayscale value of the first sub-pixel PR, or it can exclude the driving voltage value of the first sub-pixel PR; the first sub-compensation table can include a first compensation parameter group corresponding to each emitted grayscale value of the first sub-pixel PR, or it can include only the first compensation parameter group corresponding to some grayscale values ​​(i.e., the first binding point compensation parameter group).

[0137] The following is an exemplary description of the second sub-compensation table corresponding to the monochromatic pixels emitting light from the second sub-pixel PG. In these examples, when the second sub-pixel PG emits light, both the first sub-pixel PR and the third sub-pixel PB are used as correction sub-pixels. The second sub-compensation table can be used to determine the driving voltage value of the second sub-pixel PG based on its grayscale value, or it may not include the driving voltage value of the second sub-pixel PG. The second sub-compensation table may include a second compensation parameter group corresponding to each emitted grayscale value of the second sub-pixel PG, or it may only include a second compensation parameter group corresponding to some grayscale values ​​(referred to as the second binding point compensation parameter group in this disclosure).

[0138] Table 5 shows a first example of a second sub-compensation table. In this example, both the first sub-pixel PR and the third sub-pixel PB are modified sub-pixels. In this example, the grayscale value range of the sub-pixels is 0–255. Referring to Table 5, the second sub-compensation table includes the grayscale value G of the second sub-pixel PG. G(i) The corresponding black state voltage compensation value V of the first sub-pixel PR R(0_i) And the black state voltage compensation value V of the third sub-pixel PB B(0_i) Where i is the grayscale value of the second sub-pixel PG, which is any positive integer from 1 to 255. It can be understood that in this example, the grayscale value of sub-pixel PX is an 8-bit grayscale value. In other examples, the grayscale value of sub-pixel PX can also be in a range other than 0 to 255, such as 0 to 128, 0 to 512, or 0 to 1024, etc.

[0139] In Table 5, the grayscale value G G(i) Black-state voltage compensation value V R(0_i) Black-state voltage compensation value V B(0_i) Together, they form a second compensation parameter group for the second sub-compensation table. For example, the grayscale value G of the second sub-pixel PG. G(1) The black state voltage compensation value of the first sub-pixel PR is 1, and the value is V. R(0_1) The black state voltage compensation value of the third sub-pixel PB is V. B(0_1) The grayscale value G of the second sub-pixel PG G(2) The black state voltage compensation value of the first sub-pixel PR is 2, and the value is V. R(0_2) The black state voltage compensation value of the third sub-pixel PB is V. B(0_2) The grayscale value G of the second sub-pixel PG G(3) The value is 3, and the black state voltage compensation value of the first sub-pixel PR is V. R(0_3) The black state voltage compensation value of the third sub-pixel PB is V. B ( 0_3) The grayscale value G of the second sub-pixel PG G(4) The value is 4, and the black state voltage compensation value of the first sub-pixel PR is V. R(0_4)The black state voltage compensation value of the third sub-pixel PB is V. B(0_4) Similarly, the grayscale value G of the second sub-pixel PG... G(254) The value is 254, and the black state voltage compensation value of the first sub-pixel PR is V. R(0_254) The black state voltage compensation value of the third sub-pixel PB is V. B(0_254) The grayscale value G of the second sub-pixel PG G(255) The black state voltage compensation value of the first sub-pixel PR is 255. R(0_255) The black state voltage compensation value of the third sub-pixel PB is V. B(0_255) .

[0140] Table 5: First Example of the Second Sub-Compensation Table

[0141]

[0142] In the first example of the second sub-compensation table, the driving voltage value V of the second sub-pixel PG at grayscale value i G(i) The values ​​can be stored in other registers instead of the compensation parameter group register. For example, when the second sub-pixel PG is not a correction sub-pixel, the voltage determination unit of the driving module CTR can determine the driving voltage value of the second sub-pixel PG based on its grayscale value. In this way, the capacity of the compensation parameter group register in the compensation unit can be reduced, thereby helping to reduce the cost of the driving module CTR.

[0143] Table 6 shows a second example of the second sub-compensation table. Compared to the first example, this second example's second sub-compensation table also includes the driving voltage value of the second sub-pixel PG at different gray levels, that is, the driving voltage value V of the second sub-pixel PG at gray level i. G(i) In this second example, the compensation unit can obtain the driving voltage value of the second sub-pixel PG by looking up the second sub-compensation table. Thus, when the detection unit determines that the second sub-pixel PG is a monochromatic pixel emitting light, the compensation unit can determine the driving voltage values ​​of each sub-pixel PX of that monochromatic pixel (i.e., the driving voltage value of the second sub-pixel PG, the black state voltage compensation value of the first sub-pixel PR, and the black state voltage compensation value of the third sub-pixel PB) according to the second sub-compensation table.

[0144] Table 6: Second Example of the Second Sub-Compensation Table

[0145]

[0146] In one example, when the grayscale values ​​of two second sub-pixels PG in a monochromatic pixel that emits light are different, a reference grayscale value for the second sub-pixel PG can be determined based on the actual grayscale values ​​of the two second sub-pixels PG. Then, the black-state voltage compensation value for the correction sub-pixel can be determined based on the reference grayscale value and the second sub-compensation table. When determining the driving voltage value of the second sub-pixel PG, the driving voltage value for each second sub-pixel PG is determined based on its actual grayscale value.

[0147] In one example, when the grayscale values ​​of two second sub-pixels PG in the monochrome pixels that emit light from the second sub-pixel PG are different, the maximum value of the actual grayscale values ​​of the two second sub-pixels PG is determined as the reference grayscale value of the second sub-pixel PG, or the average value of the actual grayscale values ​​of the two second sub-pixels PG is determined as the reference grayscale value of the second sub-pixel PG.

[0148] In the two examples above, the second sub-compensation table includes the black-state voltage compensation value of the corrected sub-pixel corresponding to any non-zero grayscale value of the second sub-pixel PG (i.e., i is any integer from 1 to 255). Once the grayscale value (or reference grayscale value) of the second sub-pixel PG is determined, the black-state voltage compensation value of the corrected sub-pixel can be directly obtained by looking up the second sub-compensation table.

[0149] The compensation unit of this disclosure can also be configured in other ways, such that the second sub-compensation table only includes a portion of the grayscale values ​​of the second sub-pixel PG and the corresponding black-state voltage compensation values ​​of the correction sub-pixels. For example, the second sub-compensation table includes only 8 to 30 different second compensation parameter groups, and the grayscale values ​​of the second sub-pixel PG, which are luminescent sub-pixels, are different in any two second compensation parameter groups. Thus, the black-state voltage compensation values ​​of the correction sub-pixels corresponding to at least a portion of the grayscale values ​​of the second sub-pixels PG cannot be directly determined by looking up the second sub-compensation table. In the embodiments of this disclosure, these second compensation parameter groups of the second sub-compensation table can be referred to as second binding point compensation parameter groups; in the second binding point compensation parameter groups, the grayscale values ​​of the second sub-pixel PG are referred to as the binding point grayscale values ​​of the second sub-pixel PG, and the black-state voltage compensation values ​​of the correction sub-pixels are referred to as the binding point compensation values ​​of the correction sub-pixels.

[0150] Optionally, the compensation unit is configured to determine the black state voltage compensation value of the corrected sub-pixel based on the grayscale value of the second sub-pixel PG using the following method: first, obtain at least two second binding point compensation parameter sets based on the grayscale value of the second sub-pixel PG, wherein the grayscale value of the second sub-pixel PG is within the range of the binding point grayscale values ​​of the second sub-pixel PG in the two second binding point compensation parameter sets; then, based on the grayscale value of the second sub-pixel PG, the binding point grayscale values ​​of the second sub-pixel PG in the two second binding point compensation parameter sets, and the binding point compensation value of the corrected sub-pixel in the two second binding point compensation parameter sets, determine the black state voltage compensation value of the corrected sub-pixel using a linear interpolation algorithm, or determine the black state voltage compensation value of the corrected sub-pixel using other algorithms.

[0151] The following is an exemplary description of the third sub-compensation table corresponding to the monochromatic pixel emitting light from the third sub-pixel PB. Similar to the first sub-compensation table, the correction sub-pixel in the third sub-compensation table can be only the second sub-pixel PG, or it can be the first sub-pixel PR and the second sub-pixel PG; the third sub-compensation table can be used to determine the driving voltage value of the third sub-pixel PB based on the grayscale value of the third sub-pixel PB, or it can exclude the driving voltage value of the third sub-pixel PB; the third sub-compensation table can include a third compensation parameter group corresponding to each emitted grayscale value of the third sub-pixel PB, or it can only include a third compensation parameter group corresponding to some grayscale values ​​(referred to as the third binding point compensation parameter group).

[0152] Table 7 shows a first example of a third sub-compensation table. In this first example, both the second sub-pixel PG and the first sub-pixel PR are modified sub-pixels. In this example, the grayscale value range of the sub-pixels is 0–255. Referring to Table 7, the third sub-compensation table includes the grayscale value G of the third sub-pixel PB. B(i) The corresponding black state voltage compensation value V of the second sub-pixel PG G(0_i) And the black state voltage compensation value V of the first sub-pixel PR R(0_i) Where i is the grayscale value of the third sub-pixel PB, which is any positive integer from 1 to 255. It can be understood that in this example, the grayscale value of sub-pixel PX is an 8-bit grayscale value. In other examples, the grayscale value of sub-pixel PX can also be in a range other than 0 to 255, such as 0 to 128, 0 to 512, or 0 to 1024, etc. In Table 7, the grayscale value G... B(i) Black-state voltage compensation value V G(0_i) Black-state voltage compensation value V R(0_i) Together, they form a third compensation parameter group for this third sub-compensation table. For example, the grayscale value G of the third sub-pixel PB. B(1) The black state voltage compensation value of the second sub-pixel PG is 1, and the value of V is 1. G(0_1) The black state voltage compensation value of the first sub-pixel PR is V. R(0_1)The grayscale value G of the third sub-pixel PB B(2) The value is 2, and the black state voltage compensation value of the second sub-pixel PG is V. G(0_2) The black state voltage compensation value of the first sub-pixel PR is V. R(0_2) The grayscale value G of the third sub-pixel PB B(3) The value is 3, and the black state voltage compensation value of the second sub-pixel PG is V. G(0_3) The black state voltage compensation value of the first sub-pixel PR is V. R(0_3) The grayscale value G of the third sub-pixel PB B(4) The value is 4, and the black state voltage compensation value of the second sub-pixel PG is V. G(0_4) The black state voltage compensation value of the first sub-pixel PR is V. R(0_4) Similarly, the grayscale value G of the third sub-pixel PB B(254) The value is 254, and the black state voltage compensation value of the second sub-pixel PG is V. G(0_254) The black state voltage compensation value of the first sub-pixel PR is V. R(0_254) The grayscale value G of the third sub-pixel PB B(255) The value is 255, and the black state voltage compensation value of the second sub-pixel PG is V. G(0_255) The black state voltage compensation value of the first sub-pixel PR is V. R(0_255) .

[0153] Table 7: First Example of a Third Sub-Compensation Table

[0154]

[0155]

[0156] In this first example, the driving voltage V of the third sub-pixel PB at grayscale value i B(i) The values ​​can be stored in other registers instead of the compensation parameter group register. For example, when the third sub-pixel PB is not a correction sub-pixel, the voltage determination unit of the driving module CTR can determine the driving voltage value of the third sub-pixel PB based on its grayscale value. In this way, the capacity of the compensation parameter group register in the compensation unit can be reduced, thereby helping to reduce the cost of the driving module CTR.

[0157] Table 8 shows a second example of the third sub-compensation table. Compared to the first example, this second example also includes the driving voltage value of the third sub-pixel PB at different gray levels, that is, the driving voltage value V of the third sub-pixel PB at gray level i. B(i)In this second example, the compensation unit can obtain the driving voltage value of the third sub-pixel PB by looking up the third sub-compensation table. Thus, when the detection unit determines that the third sub-pixel PB emits a monochromatic pixel, the compensation unit can determine the driving voltage values ​​of each sub-pixel PX of that monochromatic pixel (i.e., the driving voltage value of the third sub-pixel PB, the black state voltage compensation value of the second sub-pixel PG, and the black state voltage compensation value of the first sub-pixel PR) according to the third sub-compensation table.

[0158] Table 8: Second example of the third sub-compensation table

[0159]

[0160]

[0161] In the first and second examples of the third sub-compensation table, the corrected sub-pixels of the monochromatic pixels emitted by the third sub-pixel PB are the second sub-pixel PG and the first sub-pixel PR. The third sub-compensation table may also include other examples such that the corrected sub-pixels of the monochromatic pixels emitted by the third sub-pixel PB include only the second sub-pixel PG.

[0162] Table 9 shows a third example of the third sub-compensation table. Referring to Table 9, the third example of the third sub-compensation table is similar to the first example, but does not include the black state voltage compensation value of the first sub-pixel PR. After the detection unit determines the monochromatic pixel emitting light from the third sub-pixel PB, the compensation unit determines the black state voltage compensation value of the second sub-pixel PG based on the grayscale value of the third sub-pixel PB. The voltage determination unit determines the driving voltage value of the third sub-pixel PB based on its grayscale value, and the voltage determination unit determines the black state voltage value V of the first sub-pixel PR based on its grayscale value (which is 0). R0 Thus, compared to the first example of the third sub-compensation table, the third type of third sub-compensation table requires fewer registers.

[0163] Table 9: A third example of the third sub-compensation table

[0164]

[0165]

[0166] Table 10 shows a fourth example of the third sub-compensation table. Referring to Table 10, the fourth example of the third sub-compensation table is similar to the second example, but does not include the black state voltage compensation value of the first sub-pixel PR. After the detection unit determines the monochromatic pixel emitting light from the third sub-pixel PB, the compensation unit determines the black state voltage compensation value of the second sub-pixel PG and the driving voltage value of the third sub-pixel PB based on the grayscale value of the third sub-pixel PB. The voltage determination unit determines the black state voltage value V of the first sub-pixel PR based on the grayscale value of the first sub-pixel PR (which is 0). R0 Thus, compared to the second example of the third sub-compensation table, the fourth type of third sub-compensation table requires fewer registers.

[0167] Table 10: Fourth Example of the Third Sub-Compensation Table

[0168]

[0169] In the four examples above, the third sub-compensation table includes the black-state voltage compensation value of the corrected sub-pixel corresponding to any non-zero grayscale value of the third sub-pixel PB (i.e., i is any integer from 1 to 255). Once the grayscale value (or reference grayscale value) of the third sub-pixel PB is determined, the black-state voltage compensation value of the corrected sub-pixel can be directly obtained by looking up the third sub-compensation table.

[0170] The compensation unit of this disclosure can also be configured in other ways, such that the third sub-compensation table only includes a portion of the grayscale values ​​of the third sub-pixel PB and the corresponding black-state voltage compensation values ​​of the correction sub-pixels. For example, the third sub-compensation table includes only 8 to 30 different third compensation parameter groups, and the grayscale values ​​of the third sub-pixel PB, which are luminous sub-pixels, are different in any two third compensation parameter groups. Thus, the black-state voltage compensation values ​​of the correction sub-pixels corresponding to at least a portion of the grayscale values ​​of the third sub-pixels PB cannot be directly determined by looking up the third sub-compensation table. In the embodiments of this disclosure, these third compensation parameter groups of the third sub-compensation table can be referred to as third binding point compensation parameter groups; in the third binding point compensation parameter groups, the grayscale values ​​of the third sub-pixel PB are referred to as the binding point grayscale values ​​of the third sub-pixel PB, and the black-state voltage compensation values ​​of the correction sub-pixels are referred to as the binding point compensation values ​​of the correction sub-pixels.

[0171] Optionally, the compensation unit is configured to determine the black state voltage compensation value of the corrected sub-pixel based on the grayscale value of the third sub-pixel PB using the following method: first, obtain at least two third binding point compensation parameter sets based on the grayscale value of the third sub-pixel PB, wherein the grayscale value of the third sub-pixel PB is within the range of the binding point grayscale values ​​of the third sub-pixel PB in the two third binding point compensation parameter sets; then, based on the grayscale value of the third sub-pixel PB, the binding point grayscale values ​​of the third sub-pixel PB in the two third binding point compensation parameter sets, and the binding point compensation value of the corrected sub-pixel in the two third binding point compensation parameter sets, determine the black state voltage compensation value of the corrected sub-pixel using a linear interpolation algorithm, or determine the black state voltage compensation value of the corrected sub-pixel using other algorithms.

[0172] In one embodiment of this disclosure, the compensation parameter group of the sub-compensation table includes multiple binding point compensation parameter groups, wherein the binding point compensation parameter groups include the binding point grayscale value of the luminescent sub-pixel and the binding point black state voltage compensation value of the correction sub-pixel. Determining the black state voltage compensation value of the correction sub-pixel includes: when determining the black state voltage compensation value of at least some correction sub-pixels, using a linear interpolation method based on the two binding point compensation parameter groups and the grayscale value of the luminescent sub-pixel, determining the black state voltage compensation value of the correction sub-pixel.

[0173] Optionally, each sub-compensation table of the black-state voltage compensation table includes only multiple binding point compensation parameter groups, and the binding point compensation parameter groups only include the grayscale value of the luminous sub-pixel and the black-state voltage compensation value of the correction sub-pixel. For example, the first sub-compensation table includes only multiple first binding point compensation parameter groups; the first binding point compensation parameter group includes the grayscale value of the first sub-pixel PR (i.e., the binding point grayscale value of the first sub-pixel PR), and includes the black-state voltage compensation value of the second sub-pixel PG (i.e., the binding point compensation value of the second sub-pixel PG) as a correction sub-pixel. As another example, the second sub-compensation table includes only multiple second binding point compensation parameter groups; the second binding point compensation parameter group includes the grayscale value of the second sub-pixel PG (i.e., the binding point grayscale value of the second sub-pixel PG), and includes the black-state voltage compensation value of the first sub-pixel PR (i.e., the binding point compensation value of the first sub-pixel PR) as a correction sub-pixel and the black-state voltage compensation value of the third sub-pixel PB (i.e., the binding point compensation value of the third sub-pixel PB) as a correction sub-pixel. For example, the third sub-compensation table only includes multiple third binding point compensation parameter groups; the third binding point compensation parameter group includes the grayscale value of the third sub-pixel PB (i.e., the binding point grayscale value of the third sub-pixel PB), and includes the black state voltage compensation value of the second sub-pixel PG as a correction sub-pixel (i.e., the binding point compensation value of the second sub-pixel PG).

[0174] See Figure 9The compensation unit includes a first compensation unit and a second compensation unit. The first compensation unit is used to determine the required binding point compensation parameter set based on the grayscale value of the light-emitting sub-pixel in the monochrome pixel. The second compensation unit is used to determine the black state voltage compensation value of the correction sub-pixel based on the binding point compensation parameter set and the grayscale value of the light-emitting sub-pixel, for example, by determining the black state voltage compensation value of the correction sub-pixel using linear interpolation.

[0175] For example, when the monochrome pixel is the monochrome pixel that emits light from the first sub-pixel PR, the first compensation unit can obtain two sets of first binding point compensation parameters based on the grayscale value of the first sub-pixel PR and the first sub-compensation table. The grayscale value of the first sub-pixel PR is within the range of the binding point grayscale values ​​of the first sub-pixel PR in the two sets of first binding point compensation parameters. The second compensation unit performs linear interpolation based on the grayscale value of the first sub-pixel PR and the two sets of first binding point compensation parameters to obtain the black state voltage compensation value of the second sub-pixel PG corresponding to the grayscale value of the first sub-pixel PR.

[0176] For example, when the monochrome pixel is the monochrome pixel that emits light from the second sub-pixel PG, the first compensation unit can obtain two sets of second binding point compensation parameters based on the grayscale value of the second sub-pixel PG and the second sub-compensation table. The grayscale value of the second sub-pixel PG is within the range of the binding point grayscale values ​​of the second sub-pixel PG in the two sets of second binding point compensation parameters. The second compensation unit performs linear interpolation based on the grayscale value of the second sub-pixel PG and the two sets of second binding point compensation parameters to obtain the black state voltage compensation value of the third sub-pixel PB and the black state voltage compensation value of the first sub-pixel PR corresponding to the grayscale value of the second sub-pixel PG.

[0177] For another example, when the monochrome pixel is the monochrome pixel that emits light from the third sub-pixel PB, the first compensation unit can obtain two sets of third binding point compensation parameters based on the grayscale value of the third sub-pixel PB and the third sub-compensation table. The grayscale value of the third sub-pixel PB is within the range of the binding point grayscale values ​​of the third sub-pixel PB in the two sets of third binding point compensation parameters. The second compensation unit performs linear interpolation based on the grayscale value of the third sub-pixel PB and the two sets of third binding point compensation parameters to obtain the black state voltage compensation value of the first sub-pixel PR corresponding to the grayscale value of the third sub-pixel PB.

[0178] In one embodiment of this disclosure, see Figure 9 The voltage determination unit includes a first voltage determination unit and a second voltage determination unit.

[0179] The first voltage determining unit is used to determine at least two binding point parameters required based on the grayscale value of the uncorrected sub-pixel. The binding point parameters include the binding point grayscale value and the binding point driving voltage value of the uncorrected sub-pixel. The second voltage determining unit is used to determine the driving voltage value of the uncorrected sub-pixel based on the grayscale value and the binding point parameters of the uncorrected sub-pixel, for example, by determining the driving voltage value of the uncorrected sub-pixel using linear interpolation.

[0180] In one embodiment of this disclosure, the driving module CTR can also generate an analog driving voltage for the correction sub-pixel based on the black state voltage compensation value of the correction sub-pixel determined by the compensation unit, and apply it to the pixel driving circuit PDC of the correction sub-pixel to drive the correction sub-pixel and achieve the purpose of improving the display effect of the light-emitting sub-pixel in the monochrome pixel.

[0181] It is understood that the driving module CTR can also determine the driving voltage value of the uncorrected sub-pixel based on the grayscale value of the uncorrected sub-pixel, thereby generating an analog driving voltage for the uncorrected sub-pixel and applying it to the pixel driving circuit PDC of the uncorrected sub-pixel to drive the uncorrected sub-pixel. In the embodiments of this disclosure, uncorrected sub-pixels refer to other sub-pixels PX besides corrected sub-pixels, such as each sub-pixel PX in a non-emitting pixel, each sub-pixel PX in a pixel emitting two or three colors of light, and each emitting sub-pixel.

[0182] In one example, the driving module CTR further includes a driving unit configured to drive the corrected sub-pixel according to the black-state voltage compensation value of the corrected sub-pixel. Furthermore, the driving unit is also configured to drive the uncorrected sub-pixel according to the driving voltage value of the uncorrected sub-pixel.

[0183] In one example, see Figure 9 The driving unit includes a latching subunit and a conversion subunit. The latching subunit stores the black-state voltage compensation value of the corrected sub-pixel and the driving voltage value of the uncorrected sub-pixel. The conversion subunit generates an analog driving voltage for the corrected sub-pixel based on its black-state voltage compensation value, and generates an analog driving voltage for the uncorrected sub-pixel based on its driving voltage value. After generating the analog driving voltage for each sub-pixel PX, the conversion subunit applies the analog driving voltage to the pixel driving circuit PDC electrically connected to the sub-pixel PX. Further, the conversion subunit may include a digital-to-analog converter circuit and an amplification circuit. The digital-to-analog converter converts the driving voltage value into an analog driving voltage, and the amplification circuit increases the driving current when applying the analog driving voltage to the pixel driving circuit PDC.

[0184] In one embodiment of this disclosure, a black-state voltage compensation table can be obtained through a black-state voltage correction process, and the obtained black-state voltage compensation table can be written into the compensation parameter group register of the drive module CTR.

[0185] Figure 10 A schematic diagram illustrating the process of obtaining a first compensation parameter group from the first sub-compensation table. See also... Figure 10 This allows the display device to enter a first sub-pixel debugging mode, and then acquire a target grayscale value for the first sub-pixel. This target grayscale value is the grayscale value of the first sub-pixel PR in the first compensation parameter group. The voltage determination unit can determine the driving voltage value of the first sub-pixel PR based on the target grayscale value of the first sub-pixel PR. Figure 10 In the example, the corrected sub-pixel in the monochrome pixel emitting the first sub-pixel PR is the second sub-pixel PG. Therefore, the voltage determination unit determines the driving voltage value of the third sub-pixel PB based on the grayscale value (which is 0) of the third sub-pixel PB. A candidate value of the black state voltage compensation value of the second sub-pixel PG can be written to the compensation parameter group register, and the compensation unit uses the written candidate value of the black state voltage compensation value of the second sub-pixel PG as the black state voltage compensation value of the second sub-pixel PG in the current stage. Then, the driving unit drives the display panel PNL based on the driving voltage value of the first sub-pixel PR, the driving voltage value of the third sub-pixel PB, and the black state voltage compensation value of the second sub-pixel PG. After the display panel PNL displays the image, the detection system acquires the display image of the display panel PNL to determine the actual display parameters of the first sub-pixel PR and to determine whether the emission of the first sub-pixel PR reaches the preset standard, such as whether the emission intensity of the first sub-pixel PR reaches the CIE color standard. If the emission of the first sub-pixel PR reaches the preset standard, then the candidate value of the black state voltage compensation value of the second sub-pixel PG is saved as the black state voltage compensation value of the second sub-pixel PG in the first compensation parameter group. If the emission of the first sub-pixel PR does not meet the preset standard, a new candidate value for the black state voltage compensation value of the second sub-pixel PG is written into the compensation parameter group register and overwrites the original candidate value. The display and detection are then performed based on the new candidate value until a certain candidate value makes the emission of the first sub-pixel PR meet the preset standard.

[0186] In the process of obtaining the first sub-compensation table, you can refer to the above method to obtain and save each first compensation parameter group one by one.

[0187] Figure 11 A schematic diagram illustrating the process of obtaining a second compensation parameter group from the second sub-compensation table. See also... Figure 11This allows the display device to enter a second sub-pixel debugging mode, and then acquire a target grayscale value for the second sub-pixel. This target grayscale value is the grayscale value of the second sub-pixel PG in the second compensation parameter group. The voltage determination unit can determine the driving voltage value of the second sub-pixel PG based on the target grayscale value of the second sub-pixel PG. Figure 11 In the example, the corrected subpixels in the monochrome pixels emitting light from the second subpixel PG are the first subpixel PR and the third subpixel PB. A candidate value for the black state voltage compensation of the first subpixel PR and a candidate value for the black state voltage compensation of the third subpixel PB can be written to the compensation parameter group register. The compensation unit uses the written candidate value for the black state voltage compensation of the first subpixel PR as the current stage's black state voltage compensation value, and the compensation unit uses the written candidate value for the black state voltage compensation of the third subpixel PB as the current stage's black state voltage compensation value. Then, the driving unit drives the display panel PNL according to the driving voltage value of the second subpixel PG, the black state voltage compensation value of the third subpixel PB, and the black state voltage compensation value of the first subpixel PR. After the display panel PNL displays the image, the detection system acquires the display image of the display panel PNL to determine the actual display parameters of the second subpixel PG and judges whether the emission of the second subpixel PG meets the preset standard, such as whether the emission intensity of the second subpixel PG meets the CIE color standard. If the emission of the second sub-pixel PG reaches the preset standard, then the candidate value of the black state voltage compensation value of the first sub-pixel PR is saved as the black state voltage compensation value of the first sub-pixel PR in the second compensation parameter group, and the candidate value of the black state voltage compensation value of the third sub-pixel PB is saved as the black state voltage compensation value of the third sub-pixel PB in the second compensation parameter group. If the emission of the second sub-pixel PG does not reach the preset standard, then a new candidate value of the black state voltage compensation value of the first sub-pixel PR and / or a new candidate value of the black state voltage compensation value of the third sub-pixel PB is written into the compensation parameter group register (at least one candidate value in the candidate value combination formed by the candidate value of the black state voltage compensation value of the first sub-pixel PR and the candidate value of the black state voltage compensation value of the third sub-pixel PB is changed) and the original candidate value is overwritten. Display and detection are performed based on the new candidate value until a certain candidate value combination makes the emission of the second sub-pixel PG reach the preset standard.

[0188] In the process of obtaining the second sub-compensation table, you can refer to the above method to obtain and save each second compensation parameter group one by one.

[0189] Figure 12 A schematic diagram illustrating the process of obtaining a third compensation parameter group from the third sub-compensation table. See also... Figure 12This allows the display device to enter a third sub-pixel debugging mode, and then acquire a target grayscale value for the third sub-pixel. This target grayscale value is the grayscale value of the third sub-pixel PB in the third compensation parameter group. The voltage determination unit can determine the driving voltage value of the third sub-pixel PB based on the target grayscale value of the third sub-pixel PB. Figure 12 In the example, the corrected subpixel in the monochrome pixel emitting the third subpixel PB is the second subpixel PG. Therefore, the voltage determination unit determines the driving voltage value of the first subpixel PR based on the grayscale value (which is 0) of the first subpixel PR. A candidate value of the black state voltage compensation value of the second subpixel PG can be written to the compensation parameter group register. The compensation unit uses the written candidate value of the black state voltage compensation value of the second subpixel PG as the black state voltage compensation value of the second subpixel PG in the current stage. Then, the driving unit drives the display panel PNL based on the driving voltage value of the first subpixel PR, the driving voltage value of the third subpixel PB, and the black state voltage compensation value of the second subpixel PG. After the display panel PNL displays the image, the detection system acquires the display image of the display panel PNL to determine the actual display parameters of the third subpixel PB and judges whether the emission of the third subpixel PB reaches the preset standard, such as whether the emission intensity of the third subpixel PB reaches the CIE color standard. If the emission of the third subpixel PB reaches the preset standard, then the candidate value of the black state voltage compensation value of the second subpixel PG is saved as the black state voltage compensation value of the second subpixel PG in the third compensation parameter group. If the emission of the third sub-pixel PB does not meet the preset standard, a new candidate value for the black state voltage compensation value of the second sub-pixel PG is written into the compensation parameter group register and overwrites the original candidate value. The display and detection are then performed based on the new candidate value until a certain candidate value makes the emission of the third sub-pixel PB meet the preset standard.

[0190] In the process of obtaining the third sub-compensation table, you can refer to the above method to obtain and save each third compensation parameter group one by one.

[0191] It should be noted that although the steps of the driving method for the display device in this disclosure are described in a specific order in the accompanying drawings, this does not require or imply that these steps must be performed in that specific order, or that all the steps shown must be performed to achieve the desired result. Additional or alternative steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0192] 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 device, characterized in that, The display device includes an OLED display panel and a driving module for driving the OLED display panel; The driving method for the display device includes: Based on the image data, a monochrome pixel is determined; among the sub-pixels of the monochrome pixel, only one color of sub-pixel emits light; Based on the black state voltage compensation table and the grayscale value of the luminous sub-pixel in the monochrome pixel, the black state voltage compensation value of the correction sub-pixel of the monochrome pixel is determined; the correction sub-pixel is located in the monochrome pixel and does not emit light; in the monochrome pixel, at least a portion of the correction sub-pixel is adjacent to the luminous sub-pixel; The corrected sub-pixel is driven according to the black state voltage compensation value of the corrected sub-pixel.

2. The driving method according to claim 1, characterized in that, The pixel includes a plurality of second sub-pixels, and a first sub-pixel and a third sub-pixel adjacent to at least one second sub-pixel; when at least one second sub-pixel in the monochrome pixel emits light, at least one of the first sub-pixel and the third sub-pixel serves as the correction sub-pixel.

3. The driving method according to claim 1, characterized in that, The pixel includes a first sub-pixel and a third sub-pixel, and includes a second sub-pixel located between the first sub-pixel and the third sub-pixel; in a monochrome pixel where the first sub-pixel is a light-emitting sub-pixel, the third sub-pixel is not a correction sub-pixel of the monochrome pixel; in a monochrome pixel where the third sub-pixel is a light-emitting sub-pixel, the first sub-pixel is not a correction sub-pixel of the monochrome pixel.

4. The driving method according to claim 1, characterized in that, The pixel includes at least three different colors of sub-pixels; among the monochrome pixels, the sub-pixels that are different in color from the light-emitting sub-pixels are all modified sub-pixels of the monochrome pixels.

5. The driving method according to any one of claims 1 to 4, characterized in that, The black state voltage compensation table includes multiple sub-compensation tables that correspond one-to-one with the color of the luminous sub-pixels; each sub-compensation table includes multiple compensation parameter groups, and each compensation parameter group includes the grayscale value of the luminous sub-pixel in the monochrome pixel and the black state voltage compensation value of the correction sub-pixel in the monochrome pixel.

6. The driving method according to claim 5, characterized in that, The compensation parameter group of the sub-compensation table includes multiple binding point compensation parameter groups, which include the binding point grayscale value of the light-emitting sub-pixel and the binding point black state voltage compensation value of the correction sub-pixel. The determination of the black state voltage compensation value of the corrected sub-pixel includes: When determining the black state voltage compensation value of at least some of the modified sub-pixels, the black state voltage compensation value of the modified sub-pixels is determined by linear interpolation based on two binding point compensation parameter groups and the grayscale value of the luminous sub-pixels.

7. A driving module for a display device, characterized in that, The display device further includes an OLED display panel; the driving module for driving the OLED display panel includes: The detection unit is used to determine monochrome pixels based on image data; in each sub-pixel of the monochrome pixel, only one color of sub-pixel emits light. A compensation unit is used to determine the black state voltage compensation value of a correction sub-pixel of the monochrome pixel based on a black state voltage compensation table and the grayscale value of the luminous sub-pixel in the monochrome pixel; the correction sub-pixel is located in the monochrome pixel and does not emit light; in the monochrome pixel, at least a portion of the correction sub-pixel is adjacent to the luminous sub-pixel; A driving unit is configured to drive the correction sub-pixel according to the black state voltage compensation value of the correction sub-pixel.

8. The drive module according to claim 7, characterized in that, The drive module also includes: A voltage determination unit is used to determine the driving voltage value of the uncorrected sub-pixel based on the grayscale value of the uncorrected sub-pixel. The driving unit includes: A latch subunit is used to store the black state voltage compensation value of the corrected sub-pixel and the driving voltage value of the uncorrected sub-pixel; A conversion subunit is configured to generate an analog driving voltage for the corrected sub-pixel based on the black state voltage compensation value of the corrected sub-pixel, and to generate an analog driving voltage for the uncorrected sub-pixel based on the driving voltage value of the uncorrected sub-pixel.

9. A display device, characterized in that, Includes the drive module as described in claim 7 or 8.

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