Methods for obtaining driving parameters and methods, devices, equipment and media for display driving.

Abstract

This application discloses a method for obtaining driving parameters and a display driving method, apparatus, device, and medium. The method for obtaining driving parameters of a display panel includes: obtaining multiple first target gamma voltage values ​​corresponding to multiple target brightness values ​​within a target brightness level; determining a second target gamma voltage value corresponding to a brightness value to be displayed based on the multiple first target gamma voltage values; driving the display panel to display using the second target gamma voltage value and an initial cathode voltage value, and obtaining the actual display parameters of the display panel; if the actual display parameters do not conform to the target display parameters, adjusting the initial cathode voltage value to obtain the target cathode voltage value corresponding to the brightness value to be displayed, so that the actual display parameters of the display panel based on the second target gamma voltage value and the target cathode voltage value conform to the target display parameters. According to the embodiments of this application, the display effect of the display panel at low brightness can be improved.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a method for obtaining driving parameters of a display panel, as well as a display driving method, apparatus, device, and medium. Background Technology

[0002] With the development of display technology, the requirements for the display effect of display panels are getting higher and higher.

[0003] However, the related technology suffers from the problem that the display panel does not perform well at low brightness. Summary of the Invention

[0004] This application provides a method for debugging a display panel, as well as a display driving method, apparatus, device, and medium, which can improve the display effect of the display panel under low brightness.

[0005] In a first aspect, embodiments of this application provide a method for obtaining driving parameters of a display panel. The display panel includes sub-pixels with different emitting colors, and the cathodes of the sub-pixels with different emitting colors are disconnected from each other. For a sub-pixel with at least one emitting color, the method for obtaining driving parameters of the display panel includes: obtaining multiple first target gamma voltage values ​​corresponding to multiple target brightness values ​​within a target brightness level, wherein the target brightness level is a first brightness level range; determining a second target gamma voltage value corresponding to a brightness value to be displayed based on the multiple first target gamma voltage values, wherein the brightness value to be displayed is within the brightness range of the second brightness level range, and the maximum brightness value of the second brightness level range is less than the maximum brightness value of the first brightness level range; driving the display panel to display using the second target gamma voltage value and an initial cathode voltage value, and obtaining the actual display parameters of the display panel; if the actual display parameters do not conform to the target display parameters, adjusting the initial cathode voltage value so that the actual display parameters of the display panel based on the adjusted cathode voltage value conform to the target display parameters, thereby obtaining the target cathode voltage value corresponding to the brightness value to be displayed.

[0006] In one possible implementation of the first aspect, the second brightness level range includes n brightness values ​​to be displayed, and the target cathode voltage value includes n target cathode voltage values ​​that correspond one-to-one with the n brightness values ​​to be displayed, wherein the n brightness values ​​to be displayed are different, and n is an integer greater than or equal to 2.

[0007] After adjusting the initial cathode voltage value to obtain the target cathode voltage value, the method further includes:

[0008] Based on the initial cathode voltage value and n target cathode voltage values, a cathode voltage compensation function is fitted. The cathode voltage compensation function includes the target cathode voltage value as a function of the brightness value to be displayed.

[0009] Preferably, the method further includes:

[0010] Based on the cathode voltage compensation function, other target cathode voltage values ​​corresponding to other brightness values ​​to be displayed in the second brightness level range are obtained;

[0011] Preferably, n is greater than or equal to 3, and the cathode voltage compensation function includes the target cathode voltage value as a function of degree m with respect to the brightness value to be displayed, where m is an integer greater than or equal to 2.

[0012] In one possible implementation of the first aspect, the method further includes:

[0013] The cathode voltage compensation function is stored in the corresponding storage module of the display panel.

[0014] In one possible implementation of the first aspect, before acquiring multiple first target gamma voltage values ​​corresponding to multiple target brightness values ​​within a target brightness level, the method further includes:

[0015] Gamma adjustment is performed on multiple target brightness values ​​within the target brightness level to obtain multiple first target gamma voltage values ​​corresponding to the multiple target brightness values ​​within the target brightness level;

[0016] Preferably, determining the second target gamma voltage value of a sub-pixel at the brightness value to be displayed based on multiple first target gamma voltage values ​​includes:

[0017] Obtain the target brightness values ​​corresponding to multiple first target gamma voltage values;

[0018] The first target gamma voltage value, which is equal to the target brightness value to be displayed, is used as the second target gamma voltage value corresponding to the brightness value to be displayed.

[0019] Alternatively, if multiple target brightness values ​​are not equal to the brightness value to be displayed, the second target gamma voltage value corresponding to the brightness value to be displayed is determined based on the first target gamma voltage value corresponding to the two target brightness values ​​adjacent to the brightness value to be displayed, and based on linear interpolation.

[0020] In one possible implementation of the first aspect, the first brightness level range includes multiple brightness levels, and among the multiple brightness levels in the first brightness level range, the difference between the maximum brightness value of the target brightness level and the maximum brightness value of the second brightness level range is the smallest.

[0021] Alternatively, the first brightness level range may only include the target brightness level;

[0022] Preferably, the second brightness level range includes at least one brightness level, and the maximum brightness value of any brightness level in the second brightness level range is less than the maximum brightness value of any brightness level in the first brightness level range.

[0023] Based on the same inventive concept, in a second aspect, embodiments of this application provide a display driving method for a display panel, used to drive the display panel, the display panel including sub-pixels with different emitting colors, the cathodes of the sub-pixels with different emitting colors being disconnected from each other, and for at least one sub-pixel with an emitting color, the method includes:

[0024] The system obtains multiple first target gamma voltage values ​​corresponding to multiple target brightness values ​​within the target brightness level, as well as a cathode voltage compensation function. The cathode voltage compensation function includes a function of the target cathode voltage value with respect to the brightness value to be displayed. The target brightness level is in the first brightness level range, and the brightness value to be displayed is within the brightness range of the second brightness level range. The maximum brightness value in the second brightness level range is less than the maximum brightness value in the first brightness level range.

[0025] Based on multiple first target gamma voltage values, determine the second target gamma voltage value corresponding to the brightness value to be displayed;

[0026] The target cathode voltage value corresponding to the brightness value to be displayed is determined based on the cathode voltage compensation function.

[0027] The display panel is driven to display the image at the brightness value to be displayed using the second target gamma voltage value and the target cathode voltage value.

[0028] Based on the same inventive concept, in a third aspect, embodiments of this application provide a device for obtaining driving parameters of a display panel. The display panel includes sub-pixels with different emitting colors, and the cathodes of the sub-pixels with different emitting colors are disconnected from each other. The device includes:

[0029] The first data acquisition module is used to acquire multiple first target gamma voltage values ​​corresponding to multiple target brightness values ​​within the target brightness level, wherein the gamma voltage values ​​are within the first brightness level range.

[0030] The first mapping module is used to determine the second target gamma voltage value corresponding to the brightness value to be displayed based on multiple first target gamma voltage values. The brightness value to be displayed is within the brightness range of the second brightness level range, and the maximum brightness value of the second brightness level range is less than the maximum brightness value of the first brightness level range.

[0031] The display enable module is used to drive the display panel to display based on the second target gamma voltage value and the initial cathode voltage value, and to obtain the actual display parameters of the display panel.

[0032] The voltage adjustment module is used to adjust the initial cathode voltage value if the actual display parameters do not match the target display parameters, so that the actual display parameters of the display panel based on the adjusted cathode voltage value match the target display parameters, and obtain the target cathode voltage value corresponding to the brightness value to be displayed.

[0033] Based on the same inventive concept, in a fourth aspect, embodiments of this application provide a driving chip for driving a display panel. The display panel includes sub-pixels with different emitting colors, and the cathodes of the sub-pixels with different emitting colors are disconnected from each other. The driving chip includes:

[0034] The second data acquisition module is used to acquire multiple first target gamma voltage values ​​corresponding to multiple target brightness values ​​within the target brightness level, and a cathode voltage compensation function. The cathode voltage compensation function includes a function of the target cathode voltage value with respect to the brightness value to be displayed. The target brightness level is in the first brightness level range, and the brightness value to be displayed is within the brightness range of the second brightness level range. The maximum brightness value in the second brightness level range is less than the maximum brightness value in the first brightness level range.

[0035] The second mapping module is used to determine the second target gamma voltage value corresponding to the brightness value to be displayed based on multiple first target gamma voltage values.

[0036] The voltage determination module is used to determine the target cathode voltage value corresponding to the brightness value to be displayed based on the cathode voltage compensation function.

[0037] The display driver module is used to drive the display panel to display the image at the brightness value to be displayed using the second target gamma voltage value and the target cathode voltage value.

[0038] Based on the same inventive concept, in a fifth aspect, embodiments of this application provide an electronic device, including: a processor and a memory storing computer program instructions, wherein the processor, when executing the computer program instructions, implements the method for obtaining driving parameters of a display panel as described in any one of the first aspects, or implements the display driving method of a display panel as described in the second aspect.

[0039] Based on the same inventive concept, in a sixth aspect, embodiments of this application provide a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method for obtaining driving parameters of a display panel as described in any one of the first aspects, or implements the display driving method of a display panel as described in the second aspect.

[0040] According to the display panel driving parameter acquisition method and display driving method, apparatus, device, and medium provided in the embodiments of this application, firstly, a second target gamma voltage value corresponding to the brightness value to be displayed is obtained based on a first target gamma voltage value corresponding to the target brightness level. Then, if the actual display parameters of the display panel based on the second target gamma voltage value and the initial cathode voltage value do not conform to the target display parameters, the initial cathode voltage value is further adjusted to obtain the target cathode voltage value, so that the actual display parameters of the display panel based on the second target gamma voltage value and the target cathode voltage value conform to the target display parameters. In this way, on the basis of full DC dimming mode, the cathode voltage under low brightness can be further compensated, thereby helping to improve the display effect of the display panel under low brightness. Attached Figure Description

[0041] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar features, and the drawings are not drawn to scale.

[0042] Figure 1 This is a schematic flowchart illustrating a method for obtaining driving parameters of a display panel according to an embodiment of this application;

[0043] Figure 2 This illustration shows a cross-sectional structural diagram of a display panel provided in an embodiment of this application;

[0044] Figure 3 This illustration shows another flowchart of the method for obtaining driving parameters of a display panel provided in an embodiment of this application;

[0045] Figure 4 This illustration shows another flowchart of the method for obtaining driving parameters of a display panel provided in an embodiment of this application;

[0046] Figure 5 This illustration shows another flowchart of the method for obtaining driving parameters of a display panel provided in an embodiment of this application;

[0047] Figure 6 This illustration shows a flowchart of a display driving method for a display panel provided in an embodiment of this application;

[0048] Figure 7 This illustration shows a schematic diagram of a display panel driving parameter acquisition device provided in an embodiment of this application;

[0049] Figure 8 This illustration shows a schematic diagram of a driver chip provided in an embodiment of this application;

[0050] Figure 9This illustration shows a structural diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0051] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0053] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0054] Various modifications and variations can be made to this application without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, this application is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in this application can be combined with each other without contradiction.

[0055] Before describing the technical solutions provided in the embodiments of this application, in order to facilitate understanding of the embodiments of this application, this application first specifically explains the problems existing in the related technologies:

[0056] Organic light-emitting diode (OLED) display panels have many advantages such as self-illumination, fast response, high brightness, and thinness, and have gradually become the mainstream in the display field.

[0057] With the increasing popularity and technological advancements of OLED displays, the eye-protection features of screens in consumer devices are becoming increasingly important. In low-brightness mode, to improve the display effect, the light-emitting time of the display panel within a single frame can be reduced to increase the OLED current, thus improving the display effect at low brightness. This dimming mode is called PWM dimming. The opposite of PWM dimming is full DC dimming. Full DC mode offers better eye protection because of its stable light-emitting time and virtually no screen flicker.

[0058] Full DC dimming includes: in high-brightness mode, gamma adjustment is performed on the display panel to obtain the target gamma voltage value in high-brightness mode; the target gamma voltage value in low-brightness mode is directly mapped from the target gamma voltage value in high-brightness mode. The target gamma voltage value corresponds to the gamma register value.

[0059] However, when OLED devices change from high brightness to low brightness, the efficiency of OLED devices with different emission colors of sub-pixels changes inconsistently. Therefore, the target register value under low brightness is directly mapped from the target register value under high brightness, which will cause the display panel to have color shift problem under low brightness in full DC dimming mode.

[0060] To address the aforementioned issues, this application provides a method for debugging a display panel, as well as a display driving method, apparatus, device, and medium. The following description, in conjunction with the accompanying drawings, will illustrate various embodiments of the display panel debugging method, display driving method, apparatus, device, and medium.

[0061] The method for obtaining driving parameters of a display panel provided in this application embodiment is used to adjust the cathode voltage of the display panel. The display panel may include sub-pixels with different emitting colors, and the cathodes of the sub-pixels with different emitting colors are disconnected from each other.

[0062] For at least one sub-pixel of a luminous color in the display panel, such as Figure 1 As shown, the method for obtaining the driving parameters of the display panel provided in this application embodiment may include S10 to S40.

[0063] S10, acquire multiple first target gamma voltage values ​​corresponding to multiple target brightness values ​​within the target brightness level, where the target brightness level is in the first brightness level range;

[0064] S20, based on multiple first target gamma voltage values, determine the second target gamma voltage value corresponding to the brightness value to be displayed, the brightness value to be displayed is within the brightness range of the second brightness level range, and the maximum brightness value of the second brightness level range is less than the maximum brightness value of the first brightness level range;

[0065] S30, drive the sub-pixel display with the second target gamma voltage value and the initial cathode voltage value, and obtain the actual display parameters of the display panel;

[0066] S40, if the actual display parameters do not match the target display parameters, adjust the initial cathode voltage value so that the actual display parameters of the display panel based on the adjusted cathode voltage value match the target display parameters, and obtain the target cathode voltage value corresponding to the brightness value to be displayed.

[0067] The specific implementation methods of the above steps will be described in detail below.

[0068] According to the display panel driving parameter acquisition method provided in this application embodiment, firstly, a second target gamma voltage value corresponding to the brightness value to be displayed is obtained based on a first target gamma voltage value corresponding to the target brightness level. Then, if the actual display parameters of the display panel based on the second target gamma voltage value and the initial cathode voltage value do not conform to the target display parameters, the initial cathode voltage value is further adjusted to obtain the target cathode voltage value, so that the actual display parameters of the display panel based on the second target gamma voltage value and the target cathode voltage value conform to the target display parameters. In this way, on the basis of full DC dimming mode, the cathode voltage under low brightness can be further compensated, thereby helping to improve the display effect of the display panel under low brightness.

[0069] Before introducing the specific implementation methods of S10 to S40, the structure of the display panel is first described. The display panel may include sub-pixels that emit different colors of light. For example, the display panel may include an R sub-pixel that emits red light, a G sub-pixel that emits green light, and a B sub-pixel that emits blue light. The cathodes of the sub-pixels that emit different colors of light are disconnected from each other. For example, the cathodes of the R sub-pixel, the G sub-pixel, and the B sub-pixel can all be disconnected from each other, thereby allowing independent control of the cathode voltage of the sub-pixels that emit different colors of light.

[0070] As an example, please refer to Figure 2 The sub-pixel may include a pixel driving circuit 11 and a light-emitting element 20. The pixel driving circuit 11 is electrically connected to the light-emitting element 20 to drive the light-emitting element to emit light.

[0071] The light-emitting element 20 may include a stacked anode 21, a light-emitting functional layer 22, and a cathode 23. The cathodes 23 of sub-pixels with different light-emitting colors can be disconnected from each other, so that the cathode voltage of sub-pixels with different light-emitting colors can be controlled independently.

[0072] The display panel may include a substrate 10, and the light-emitting element 20 may be located on one side of the substrate 10. The substrate 10 may include a pixel driving circuit 11.

[0073] The display panel may also include a pixel defining portion 40 and an isolation structure 30. The pixel defining portion 40 may include a pixel opening, and a light-emitting functional layer 23 may be disposed within the pixel opening.

[0074] The cathodes 23 of sub-pixels with different emission colors can be disconnected from each other through the isolation structure 30. For example, the isolation structure 30 may include an isolation wall 31 and a barrier portion 32. The projected area of ​​the barrier portion 32 on the substrate 10 may be larger than the projected area of ​​the isolation wall 31 on the substrate 10.

[0075] Optionally, in the direction perpendicular to the plane of the substrate 10, the cross-section of the isolation wall 31 can be a regular trapezoid or an inverted trapezoid.

[0076] The isolation wall 31 and the barrier part 32 can be made of conductive or insulating materials.

[0077] When the isolation wall 31 is made of metal, only one of the cathodes of two adjacent sub-pixels with different emission colors is electrically connected to the isolation wall 31. This can be achieved by adjusting the evaporation angle of the light-emitting functional layer 22 and the cathode 23.

[0078] Figure 2 The way the cathodes are disconnected from each other shown is merely an example and is not intended to limit this application.

[0079] The specific implementation methods of S10 to S40 are described below.

[0080] First, let's introduce S10.

[0081] The display panel can include multiple brightness levels, and can display at different brightness levels. Each brightness level has a certain brightness range. Taking an image bit depth of 8 bits as an example, it includes a grayscale image from 0 to 255. The display panel can display a grayscale image from 0 to 255 at each brightness level, and the brightness of different grayscale images displayed at the same brightness level will be different.

[0082] For example, the multiple brightness levels of a display panel can be divided into a first brightness level range and a second brightness level range, where the maximum brightness value of the second brightness level range is less than the maximum brightness value of the first brightness level range.

[0083] The first and second brightness level ranges may each include at least one brightness level. The maximum brightness value of any brightness level in the second brightness level range is less than the maximum brightness value of any brightness level in the first brightness level range. For example, the first brightness level range may include brightness levels HBM to L1, and the second brightness level range may include brightness levels L2 to Ln. For example, the brightness range of brightness level HBM is 0 to 600 nits, the brightness range of brightness level L1 is 0 to 200 nits, the brightness range of brightness level L2 is 0 to 100 nits, and the brightness range of brightness level Ln is 0 to 2 nits.

[0084] One of the brightness levels in the first brightness level range can be used as the target brightness level.

[0085] Prior to S10, the method provided in this application embodiment may further include: performing gamma adjustment on multiple target brightness values ​​within the target brightness level to obtain multiple first target gamma voltage values ​​corresponding to the multiple target brightness values ​​within the target brightness level.

[0086] Understandably, the gamma tuning process is the same as the gamma voltage value tuning process. The actual display brightness value of the display panel based on the first target gamma voltage value can basically reach or equal the target brightness value corresponding to the first target gamma voltage value.

[0087] For example, for any target brightness value within the target brightness level, an initial gamma voltage value corresponding to the target brightness value can be set. Then, the display panel is driven to display based on the initial gamma voltage value, and the actual display brightness value is collected. If the difference between the collected actual display brightness value and the target brightness value is outside the preset range, the initial gamma voltage value is adjusted to obtain the adjusted gamma voltage value. This ensures that the difference between the actual display brightness value and the target brightness value of the display panel is within the preset range under the drive of the adjusted gamma voltage value. The adjusted gamma voltage value is then used as the first target gamma voltage value corresponding to the target brightness value.

[0088] For example, gamma adjustment can be performed on the display panel at each brightness level within the first brightness level range to obtain the target gamma voltage value corresponding to each brightness level within the first brightness level range.

[0089] When the target brightness value is known, the gray level corresponding to the target brightness value can be determined according to the following formula (1).

[0090]

[0091] Where Lx represents the target brightness value, Lmax represents the maximum brightness value corresponding to a certain brightness level, Gmax represents the maximum grayscale of the display panel, r represents the gamma index, and gray represents the grayscale value corresponding to the target brightness value Lx.

[0092] It is understandable that different brightness levels correspond to different maximum brightness values, so the same target brightness value can correspond to different grayscale levels at different brightness levels.

[0093] For example, Gmax = 255, r = 2, the maximum brightness of the i-th brightness level is 500 nits, and the maximum brightness of the j-th brightness level is 300 nits. Taking a brightness value of approximately 5.10 nits as an example, this target brightness value corresponds to 32 gray levels at the i-th brightness level and 40 gray levels at the j-th brightness level. The gamma voltage values ​​corresponding to 32 gray levels at the i-th brightness level and 40 gray levels at the j-th brightness level can be the same. Next, we will introduce S20.

[0094] Gamma adjustment of the display panel can be performed only at the high brightness level. The target gamma voltage value at the low brightness level can be mapped from the target gamma voltage value at the high brightness level, thus improving the adjustment efficiency.

[0095] In some embodiments, such as Figure 3 As shown, S20 may specifically include S21 to S22.

[0096] S21, acquire the target brightness values ​​corresponding to the multiple first target gamma voltage values ​​respectively;

[0097] S22, take the first target gamma voltage value corresponding to the target brightness value that is equal to the brightness value to be displayed as the second target gamma voltage value corresponding to the brightness value to be displayed;

[0098] Alternatively, if multiple target brightness values ​​are not equal to the brightness value to be displayed, the second target gamma voltage value corresponding to the brightness value to be displayed is determined based on the first target gamma voltage value corresponding to the two target brightness values ​​adjacent to the brightness value to be displayed, and based on linear interpolation.

[0099] In this embodiment, within a target brightness level, multiple target brightness values ​​correspond one-to-one with multiple first target gamma voltage values. Specifically, the mapping method is as follows: if one of the multiple target brightness values ​​is equal to the brightness value to be displayed, then the first target gamma voltage value corresponding to that target brightness value can be directly used as the second target gamma voltage value corresponding to the brightness value to be displayed. If none of the multiple target brightness values ​​are equal to the brightness value to be displayed, two target brightness values ​​adjacent to the brightness value to be displayed are selected, and further, based on linear interpolation, the second target gamma voltage value corresponding to the brightness value to be displayed can be determined. In this way, the mapped second target gamma voltage value is relatively accurate.

[0100] For example, the target brightness value range under target brightness level L1 is 0 to 200 nits. For instance, some target brightness values ​​under target brightness level L1 can be selected for gamma adjustment. For example, target brightness values ​​of 0 nit, 40 nit, 80 nit, 120 nit, 160 nit, and 200 nit can be selected for gamma adjustment, and the first target register values ​​corresponding to the target brightness values ​​of 0 nit, 40 nit, 80 nit, 120 nit, 160 nit, and 200 nit can be obtained respectively.

[0101] If the brightness value to be displayed in the low brightness level range is, for example, 40 nit, and there is a target brightness value of 40 nit under the target brightness level L1, then the first target register value corresponding to 40 nit under the target brightness level L1 can be used as the second target register value.

[0102] If the brightness value to be displayed LV1 is, for example, 100 nits, since there is a target brightness value of 100 nits under the target brightness level L1, the second target register value can be determined based on the first target register values ​​corresponding to 80 nits and 120 nits under the target brightness level L1, and based on the linear interpolation method.

[0103] As described above, gamma adjustment of the display panel can be performed only at the high brightness level, and the target gamma voltage value at the low brightness level can be mapped from the target gamma voltage value at the high brightness level.

[0104] In some embodiments, to improve the accuracy of the mapped second target gamma voltage value, when the first brightness level range includes multiple brightness levels, the difference between the maximum brightness value of the target brightness level and the maximum brightness value of the second brightness level range can be minimized among the multiple brightness levels within the first brightness level range. That is, the brightness level in the first brightness level range that is closest to the second brightness level range can be used as the target brightness level. Taking the example that the first brightness level range includes brightness levels HBM to L1, and the second brightness level range includes brightness levels L2 to Ln, brightness level L1 can be used as the target brightness level.

[0105] In other embodiments, the first brightness level range may include only the target brightness level. That is, the first brightness level range includes only one brightness level. Since gamma adjustment of the display panel is required within the first brightness level range, the fewer brightness levels included in the first brightness level range, the more efficient the gamma adjustment will be.

[0106] Next, let's introduce the S30.

[0107] The display panel sub-pixels can be driven by the second target gamma register value, gamma voltage value, and initial cathode voltage value. Then, the image displayed on the display panel can be photographed, and the actual display parameters of the display panel can be obtained based on the photographed image.

[0108] Actual display parameters may include at least one of actual display brightness and actual color coordinates. For example, actual display parameters may include actual display brightness and actual color coordinates; correspondingly, target display parameters may include target display brightness and target color coordinates. It is understood that the target display brightness is equal to the brightness value to be displayed.

[0109] For example, the initial cathode voltage values ​​for different emitting colors can be equal. The cathode voltage value of the display panel in the first brightness level range can be the initial cathode voltage value.

[0110] Next, let's introduce the S40.

[0111] If the actual displayed parameters differ significantly from the target displayed parameters, the actual displayed parameters are considered not to meet the target displayed parameters. If the difference between the actual displayed parameters and the target displayed parameters is small or the same, the actual displayed parameters are considered to meet the target displayed parameters.

[0112] If the actual display parameters do not match the target display parameters, the initial cathode voltage value can be increased or decreased to obtain the target cathode voltage value.

[0113] Since the second brightness level range can include multiple brightness values, if the initial cathode voltage value is adjusted for each brightness value within the second brightness level range, the required adjustment time will be relatively long.

[0114] For example, n brightness values ​​can be selected from multiple brightness values ​​within the second brightness level range as the brightness values ​​to be displayed, where n is an integer greater than or equal to 2. It is understood that the n brightness values ​​to be displayed are different.

[0115] For example, n equals 3, and the three brightness values ​​to be displayed are Lv1, Lv2, and Lv3. The target cathode voltage values ​​corresponding to the brightness values ​​Lv1, Lv2, and Lv3 can be obtained according to the methods described in S10 to S40.

[0116] The display panel includes R sub-pixels, G sub-pixels, and B sub-pixels. The target cathode voltage value corresponding to any brightness value to be displayed can include the target cathode voltage values ​​corresponding to the R sub-pixels, G sub-pixels, and B sub-pixels, respectively.

[0117] For any color sub-pixel, the target cathode voltage value can be determined using the methods described in embodiments S10 to S40 of this application.

[0118] In some embodiments, such as Figure 4 As shown, after S40, the method for obtaining the driving parameters of the display panel provided in this application embodiment may further include S50.

[0119] S50, based on the initial cathode voltage value and n target cathode voltage values, fits a cathode voltage compensation function, which includes a function of the target cathode voltage value with respect to the brightness value to be displayed.

[0120] According to the embodiments of this application, the cathode voltage value can be adjusted only at a portion of the brightness values ​​in the second brightness level range. The target cathode voltage value at other brightness values ​​that have not been actually adjusted can be determined based on the fitted cathode voltage compensation function. This can shorten the adjustment time and improve the adjustment efficiency.

[0121] For example, n can be greater than or equal to 3, and the cathode voltage compensation function can include the target cathode voltage value as a function of degree m with respect to the brightness value to be displayed, where m is an integer greater than or equal to 2.

[0122] For example, n=3, m=2,

[0123] When the display panel includes sub-pixels of multiple colors, the cathode voltage compensation function corresponding to each sub-pixel of multiple colors can be fitted separately.

[0124] For example, the cathode voltage compensation function for the R sub-pixel is Equation (1), the cathode voltage compensation function for the G sub-pixel is Equation (2), and the cathode voltage compensation function for the B sub-pixel is Equation (3):

[0125] Yr=a*x1 2 +b*x1+c(1)

[0126] Yg=k*x2 2 +m*x²+n(2)

[0127] Yb=f*x3 2 +h*x3+i(3)

[0128] In the above formula, Yr, Yg, and Yb represent the target cathode voltage values ​​of the R sub-pixel, G sub-pixel, and B sub-pixel, respectively, and x1, x2, and x3 represent the brightness values ​​to be displayed.

[0129] For example, the target cathode voltage values ​​corresponding to the R sub-pixel, G sub-pixel, and B sub-pixel under the brightness value Lv1 to be displayed can be Vr1, Vg1, and Vb1, respectively; the target cathode voltage values ​​corresponding to the R sub-pixel, G sub-pixel, and B sub-pixel under the brightness value Lv2 to be displayed can be Vr2, Vg2, and Vb2, respectively; and the target cathode voltage values ​​corresponding to the R sub-pixel, G sub-pixel, and B sub-pixel under the brightness value Lv3 to be displayed can be Vr3, Vg3, and Vb3, respectively.

[0130] The target cathode voltage value Vr1 can be substituted into Yr in the above equation (1), and the brightness value to be displayed Lv1 can be substituted into x1 in the above equation (1) to obtain the first equation; the target cathode voltage value Vr2 can be substituted into Yr in the above equation (1), and the brightness value to be displayed Lv2 can be substituted into x1 in the above equation (1) to obtain the second equation; the target cathode voltage value Vr3 can be substituted into Yr in the above equation (1), and the brightness value to be displayed Lv3 can be substituted into x1 in the above equation (1) to obtain the third equation; then, based on the three equations obtained, the values ​​of coefficients a / b / c can be calculated.

[0131] Similarly, the values ​​of the brightness to be displayed Lv1, Lv2, Lv3 and the target cathode voltage values ​​Vg1, Vg2, Vg3 corresponding to the G sub-pixel can be substituted into equation (2) above to calculate the value of the coefficient k / m / n. The values ​​of the brightness to be displayed Lv1, Lv2, Lv3 and the target cathode voltage values ​​Vb1, Vb2, Vb3 corresponding to the B sub-pixel can be substituted into equation (3) above to calculate the value of the coefficient f / h / i.

[0132] Understandably, the more brightness values ​​to be displayed, the better the fitted cathode voltage compensation function will match the brightness curve of each luminous color sub-pixel.

[0133] In some embodiments, after S50, the method provided in this application embodiment may further include: obtaining other target cathode voltage values ​​corresponding to other brightness values ​​to be displayed in the second brightness level range based on the cathode voltage compensation function (other target cathode voltage values ​​do not include the target cathode voltage values ​​obtained by the above-mentioned debugging among the target cathode voltage values). For example, any brightness value to be displayed in the second brightness level range can be substituted into the cathode voltage compensation function to calculate the target cathode voltage value corresponding to the brightness value to be displayed.

[0134] In some embodiments, such as Figure 5 As shown, after S50, the method for obtaining the driving parameters of the display panel provided in this application embodiment may further include S60.

[0135] S60 stores the cathode voltage compensation function to the corresponding storage module of the display panel.

[0136] The embodiments of this application can reduce storage space compared to directly storing the compensation value of the cathode voltage or directly storing the target cathode voltage value under each brightness value to be displayed.

[0137] Based on the same inventive concept, embodiments of this application also provide a display driving method for a display panel. The display driving method for a display panel provided in this application is used to drive the display panel to display. The display panel may include sub-pixels with different emitting colors, and the cathodes of the sub-pixels with different emitting colors are disconnected from each other.

[0138] For at least one sub-pixel of a luminous color in the display panel, such as Figure 6 As shown, the display driving method for the display panel provided in this application embodiment may include S61 to S64.

[0139] S61, obtain multiple first target gamma voltage values ​​corresponding to multiple target brightness values ​​within the target brightness level, and the cathode voltage compensation function of the sub-pixel. The cathode voltage compensation function includes a function of the target cathode voltage value with respect to the brightness value to be displayed. The target brightness level is in the first brightness level range, and the brightness value to be displayed is within the brightness range of the second brightness level range. The maximum brightness value of the second brightness level range is less than the maximum brightness value of the first brightness level range.

[0140] S62, determine the second target gamma voltage value corresponding to the brightness value to be displayed based on multiple first target gamma voltage values;

[0141] S63, determine the target cathode voltage value corresponding to the brightness value to be displayed based on the cathode voltage compensation function;

[0142] S64, drives the display panel to display the image at the brightness value to be displayed using the second target gamma voltage value and the target cathode voltage value.

[0143] The specific implementation methods of the above steps will be described in detail below.

[0144] According to the display driving method for the display panel provided in the embodiments of this application, a second target gamma voltage value corresponding to the brightness value to be displayed is obtained based on a first target gamma voltage value corresponding to the target brightness level, and a target cathode voltage value corresponding to the brightness value to be displayed is determined based on a cathode voltage compensation function. In this way, on the basis of full DC dimming mode, further compensation can be made for the sub-cathode voltage under low brightness, thereby improving the display effect of the display panel under low brightness.

[0145] The structure of the display panel can be as described in the embodiments of the above-described method for obtaining the driving parameters of the display panel, and will not be repeated here.

[0146] First, let's introduce the S61.

[0147] When the display panel includes a red-emitting R sub-pixel, a green-emitting G sub-pixel, and a blue-emitting B sub-pixel, the cathode voltage compensation function obtained by S61 may include the cathode voltage compensation functions corresponding to the R sub-pixel, G sub-pixel, and B sub-pixel, respectively.

[0148] The target brightness level, target brightness value, first target gamma voltage value, brightness value to be displayed, first brightness level range, second brightness level range, etc. involved in the display driving method of the display panel provided in this application embodiment can be described as described in the above embodiment of the display panel driving parameter acquisition method, and will not be repeated here.

[0149] In S62, the second target gamma voltage value can be determined in accordance with the methods of S21 and S22 described in the above embodiments, which will not be repeated here.

[0150] In S63, for example, to determine the target cathode voltage value corresponding to the brightness value Lv4 to be displayed for the R sub-pixel, Lv4 can be substituted into x1 in the above formula (1). For example, the value of Yr can be calculated as Vr4, then the target cathode voltage value corresponding to the brightness value Lv4 to be displayed for the R sub-pixel is Vr4.

[0151] In S64, a data voltage can be generated based on the second target gamma voltage value and the generated data voltage can be provided to the display panel. In addition, a target cathode voltage value is provided to the cathode of the display panel to drive the display panel to display the image at the brightness value to be displayed.

[0152] Based on the same inventive concept, this application also provides a device for obtaining driving parameters of a display panel. The display panel includes sub-pixels with different emitting colors, and the cathodes of the sub-pixels with different emitting colors are disconnected from each other.

[0153] like Figure 7 As shown, the display panel driving parameter acquisition device 700 provided in this application embodiment may include a first data acquisition module 701, a first mapping module 702, a display enable module 703, and a voltage adjustment module 704.

[0154] For a sub-pixel of at least one luminous color in the display panel, the first data acquisition module 701, the first mapping module 702, the display enable module 703, and the voltage adjustment module 704 can perform the following functions.

[0155] The first data acquisition module 701 is used to acquire multiple first target gamma voltage values ​​corresponding to multiple target brightness values ​​within the target brightness level, wherein the gamma voltage values ​​are within the first brightness level range.

[0156] The first mapping module 702 is used to determine the second target gamma voltage value corresponding to the brightness value to be displayed based on multiple first target gamma voltage values. The brightness value to be displayed is within the brightness range of the second brightness level range, and the maximum brightness value of the second brightness level range is less than the maximum brightness value of the first brightness level range.

[0157] The display enable module 703 is used to drive the display panel to display with the second target gamma voltage value and the initial cathode voltage value, and to obtain the actual display parameters of the display panel.

[0158] The voltage adjustment module 704 is used to adjust the initial cathode voltage value if the actual display parameters do not conform to the target display parameters, so that the actual display parameters of the display panel based on the adjusted cathode voltage value conform to the target display parameters, and obtain the target cathode voltage value corresponding to the brightness value to be displayed.

[0159] According to the display panel driving parameter acquisition device provided in the embodiments of this application, firstly, a second target gamma voltage value corresponding to the brightness value to be displayed is obtained based on a first target gamma voltage value corresponding to the target brightness level. Then, if the actual display parameters of the display panel based on the second target gamma voltage value and the initial cathode voltage value do not conform to the target display parameters, the initial cathode voltage value is further adjusted to obtain the target cathode voltage value, so that the actual display parameters of the display panel based on the second target gamma voltage value and the target cathode voltage value conform to the target display parameters. In this way, on the basis of full DC dimming mode, the cathode voltage of the sub-pixels can be further compensated at low brightness, thereby improving the display effect of the display panel at low brightness.

[0160] In some optional embodiments, the second brightness level range includes n brightness values ​​to be displayed, and the target cathode voltage value includes n target cathode voltage values ​​that correspond one-to-one with the n brightness values ​​to be displayed. The n brightness values ​​to be displayed are different, and n is an integer greater than or equal to 2.

[0161] The display panel driving parameter acquisition device provided in this application embodiment may further include a function fitting module, which can be used for:

[0162] Based on the initial cathode voltage value and n target cathode voltage values, a cathode voltage compensation function is fitted. The cathode voltage compensation function includes the target cathode voltage value as a function of the brightness value to be displayed.

[0163] In some optional embodiments, the function fitting module can also be used to: obtain the target cathode voltage value corresponding to the brightness value to be displayed in the second brightness level range based on the cathode voltage compensation function.

[0164] Preferably, n is greater than or equal to 3, and the cathode voltage compensation function includes the target cathode voltage value as a function of degree m with respect to the brightness value to be displayed, where m is an integer greater than or equal to 2.

[0165] In some optional embodiments, the function fitting module can also be used for:

[0166] The cathode voltage compensation function is stored in the corresponding storage module of the display panel.

[0167] In some optional embodiments, the first data acquisition module 701 may also be used for:

[0168] Gamma adjustment is performed on multiple target brightness values ​​within the target brightness level to obtain multiple first target gamma voltage values ​​corresponding to the multiple target brightness values ​​within the target brightness level.

[0169] In some optional embodiments, the first mapping module 702 may specifically be used for:

[0170] Obtain the target brightness values ​​corresponding to multiple first target gamma voltage values;

[0171] The first target gamma voltage value, which is equal to the target brightness value to be displayed, is used as the second target gamma voltage value corresponding to the brightness value to be displayed.

[0172] Alternatively, if multiple target brightness values ​​are not equal to the brightness value to be displayed, the second target gamma voltage value corresponding to the brightness value to be displayed is determined based on the first target gamma voltage value corresponding to the two target brightness values ​​adjacent to the brightness value to be displayed, and based on linear interpolation.

[0173] In some optional embodiments, the first brightness level range includes multiple brightness levels, and among the multiple brightness levels in the first brightness level range, the difference between the maximum brightness value of the target brightness level and the maximum brightness value of the second brightness level range is the smallest.

[0174] Alternatively, the first brightness level range may only include the target brightness level.

[0175] Preferably, the second brightness level range includes at least one brightness level, and the maximum brightness value of any brightness level in the second brightness level range is less than the maximum brightness value of any brightness level in the first brightness level range.

[0176] It should be noted that the driving parameter acquisition method for the display panel provided in this application embodiment can be executed by a driving parameter acquisition device for the display panel, or by a control module within that driving parameter acquisition device for executing the driving parameter acquisition method for the display panel. This application embodiment uses the driving parameter acquisition device for the display panel executing the driving parameter acquisition method for the display panel as an example to illustrate the driving parameter acquisition device for the display panel provided in this application embodiment.

[0177] The device for acquiring the driving parameters of the display panel in this application embodiment can be a device, or it can be a component, integrated circuit, or chip in a terminal. This device can be a mobile electronic device or a non-mobile electronic device. For example, mobile electronic devices can be mobile phones, tablets, laptops, PDAs, in-vehicle electronic devices, wearable devices, ultra-mobile personal computers (UMPCs), netbooks, or personal digital assistants (PDAs), etc., while non-mobile electronic devices can be servers, network-attached storage (NAS), personal computers (PCs), televisions (TVs), ATMs, or self-service machines, etc. This application embodiment does not impose specific limitations.

[0178] The display panel driving parameter acquisition device provided in this application embodiment can achieve Figure 1 To avoid repetition, the various processes in the embodiment of the method for obtaining the driving parameters of the display panel shown will not be described again here.

[0179] Based on the same inventive concept, embodiments of this application also provide a driving chip for driving a display panel. The display panel includes sub-pixels that emit different colors of light, and the cathodes of the sub-pixels that emit different colors of light are disconnected from each other.

[0180] like Figure 8 As shown, the driver chip 800 provided in this application embodiment may include a second data acquisition module 801, a second mapping module 802, a voltage determination module 803, and a display driver module 804.

[0181] For a sub-pixel of at least one luminous color in the display panel, the second data acquisition module 801, the second mapping module 802, the voltage determination module 803, and the display driving module 804 can perform the following functions.

[0182] The second data acquisition module 801 is used to acquire multiple first target gamma voltage values ​​corresponding to multiple target brightness values ​​within the target brightness level, and a cathode voltage compensation function. The cathode voltage compensation function includes a function of the target cathode voltage value with respect to the brightness value to be displayed. The target brightness level is in the first brightness level range, the brightness value to be displayed is in the brightness range of the second brightness level range, and the maximum brightness value in the second brightness level range is less than the maximum brightness value in the first brightness level range.

[0183] The second mapping module 802 is used to determine the second target gamma voltage value corresponding to the brightness value to be displayed based on multiple first target gamma voltage values.

[0184] The voltage determination module 803 is used to determine the target cathode voltage value corresponding to the brightness value to be displayed based on the cathode voltage compensation function.

[0185] The display driver module 804 is used to drive the display panel to display the image at the brightness value to be displayed using the second target gamma voltage value and the target cathode voltage value.

[0186] According to the driver chip provided in the embodiments of this application, a second target gamma voltage value corresponding to the brightness value to be displayed is obtained based on a first target gamma voltage value corresponding to the target brightness level, and a target cathode voltage value corresponding to the brightness value to be displayed is determined based on a cathode voltage compensation function. In this way, on the basis of full DC dimming mode, the cathode voltage can be further compensated for under low brightness, thereby helping to improve the display effect of the display panel under low brightness.

[0187] It should be noted that the display driving method for the display panel provided in this application embodiment can be executed by a driver chip, or a control module within the driver chip for executing the display driving method for the display panel. This application embodiment uses the execution of the display driving method for the display panel by a driver chip as an example to illustrate the driver chip provided in this application embodiment.

[0188] Figure 9 A schematic diagram of the hardware structure of the electronic device provided in an embodiment of this application is shown.

[0189] An electronic device may include a processor 901 and a memory 902 storing computer program instructions.

[0190] Specifically, the processor 901 may include a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of the present invention.

[0191] Memory 902 may include mass storage for data or instructions. For example, and not limitingly, memory 902 may include a hard disk drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 902 may include removable or non-removable (or fixed) media. Where appropriate, memory 902 may be internal or external to the integrated gateway disaster recovery device. In a particular embodiment, memory 902 is non-volatile solid-state memory. In a particular embodiment, memory 902 includes read-only memory (ROM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these. Exemplarily, memory may include non-volatile transient memory.

[0192] The processor 901 reads and executes computer program instructions stored in the memory 902 to implement any of the display panel drive parameter acquisition methods or display panel display driving methods in the above embodiments.

[0193] In one example, the electronic device may also include a communication interface 903 and a bus 910. Wherein, as... Figure 9 As shown, the processor 901, memory 902, and communication interface 903 are connected through bus 910 and complete communication with each other.

[0194] The communication interface 903 is mainly used to realize communication between various modules, devices, units and / or equipment in the embodiments of the present invention.

[0195] Bus 910 includes hardware, software, or both, that couples components of an electronic device together. For example, and not limitingly, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 910 may include one or more buses. While specific buses are described and illustrated in embodiments of the invention, the invention contemplates any suitable bus or interconnect.

[0196] The electronic device can execute the display panel driving parameter acquisition method in the embodiments of this application, thereby achieving the combination Figure 1 and Figure 7 The description includes a method and apparatus for obtaining driving parameters of a display panel. Alternatively, the electronic device can execute the display driving method of the display panel in the embodiments of this application, thereby achieving a combination... Figure 6 and Figure 8 The display panel's display driving method and driver chip are described.

[0197] This application also provides a computer-readable storage medium storing a computer program. When executed by a processor, the computer program can implement the display panel driving parameter acquisition method or the display panel display driving method described in the above embodiments, and achieve the same technical effect. To avoid repetition, it will not be described again here. The aforementioned computer-readable storage medium may include read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk, etc., and is not limited thereto.

[0198] The functional blocks shown in the above-described structural diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. Programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Computer-readable medium" can include any medium capable of storing or transmitting information. Examples of computer-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0199] According to embodiments of this application, the computer-readable storage medium may be a non-transitory computer-readable storage medium.

[0200] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0201] The aspects of this application have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by dedicated hardware performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0202] The embodiments described above are not exhaustive, nor do they limit the application to the specific embodiments described herein. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to effectively utilize this application and its modifications. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A method for obtaining driving parameters of a display panel, characterized in that, The display panel includes sub-pixels with different emitting colors, and the cathodes of the sub-pixels with different emitting colors are disconnected from each other. For at least one sub-pixel with a different emitting color in the display panel, the method includes: Acquire multiple first target gamma voltage values ​​corresponding to multiple target brightness values ​​within a target brightness level, wherein the target brightness level is a first brightness level range; Based on the plurality of first target gamma voltage values, a second target gamma voltage value corresponding to the brightness value to be displayed is determined. The brightness value to be displayed is within the brightness range of the second brightness level range, and the maximum brightness value of the second brightness level range is less than the maximum brightness value of the first brightness level range. The display panel is driven to display using the second target gamma voltage value and the initial cathode voltage value, and the actual display parameters of the display panel are obtained. If the actual display parameters do not conform to the target display parameters, the initial cathode voltage value is adjusted so that the actual display parameters of the display panel based on the adjusted cathode voltage value conform to the target display parameters, thereby obtaining the target cathode voltage value corresponding to the brightness value to be displayed; The second brightness level range includes n brightness values ​​to be displayed, and the target cathode voltage value includes n target cathode voltage values ​​that correspond one-to-one with the n brightness values ​​to be displayed. The n brightness values ​​to be displayed are different, and n is an integer greater than or equal to 2. After adjusting the initial cathode voltage value to obtain the target cathode voltage value, the method further includes: Based on the initial cathode voltage value and the n target cathode voltage values, a cathode voltage compensation function is fitted, wherein the cathode voltage compensation function includes a function of the target cathode voltage value with respect to the brightness value to be displayed.

2. The method according to claim 1, characterized in that, The method further includes: Based on the cathode voltage compensation function, other target cathode voltage values ​​corresponding to other brightness values ​​to be displayed in the second brightness level range are obtained.

3. The method according to claim 1, characterized in that, n is greater than or equal to 3, and the cathode voltage compensation function includes the target cathode voltage value as a function of the mth power with respect to the brightness value to be displayed, where m is an integer greater than or equal to 2.

4. The method according to claim 1, characterized in that, The method further includes: The cathode voltage compensation function is stored in the storage module corresponding to the display panel.

5. The method according to claim 1, characterized in that, Before acquiring the multiple first target gamma voltage values ​​corresponding to the multiple target brightness values ​​within the target brightness level, the method further includes: Gamma adjustment is performed on multiple target brightness values ​​within the target brightness level to obtain multiple first target gamma voltage values ​​corresponding to the multiple target brightness values ​​within the target brightness level.

6. The method according to claim 1, characterized in that, The step of determining the second target gamma voltage value corresponding to the brightness value to be displayed based on the plurality of first target gamma voltage values ​​includes: Obtain the target brightness values ​​corresponding to the plurality of first target gamma voltage values ​​respectively; The first target gamma voltage value, which is equal to the target brightness value to be displayed, is used as the second target gamma voltage value corresponding to the brightness value to be displayed. Alternatively, if multiple target brightness values ​​are not equal to the brightness value to be displayed, a second target gamma voltage value corresponding to the brightness value to be displayed is determined based on the first target gamma voltage value corresponding to the two target brightness values ​​adjacent to the brightness value to be displayed, and using a linear interpolation method.

7. The method according to claim 1, characterized in that, The first brightness level range includes multiple brightness levels. Among the multiple brightness levels in the first brightness level range, the difference between the maximum brightness value of the target brightness level and the maximum brightness value of the second brightness level range is the smallest. Alternatively, the first brightness level range may include only the target brightness level.

8. The method according to claim 1, characterized in that, The second brightness level range includes at least one brightness level, and the maximum brightness value of any brightness level in the second brightness level range is less than the maximum brightness value of any brightness level in the first brightness level range.

9. A display driving method for a display panel, characterized in that, For driving a display panel, the display panel including sub-pixels with different emitting colors, the cathodes of the sub-pixels with different emitting colors being disconnected from each other, the method for at least one sub-pixel of the display panel emitting at least one emitting color includes: Multiple first target gamma voltage values ​​corresponding to multiple target brightness values ​​within a target brightness level are obtained, as well as a cathode voltage compensation function. The cathode voltage compensation function includes a function of the target cathode voltage value with respect to the brightness value to be displayed. The target brightness level is in a first brightness level range, and the brightness value to be displayed is within the brightness range of a second brightness level range. The maximum brightness value in the second brightness level range is less than the maximum brightness value in the first brightness level range. Based on the plurality of first target gamma voltage values, determine the second target gamma voltage value corresponding to the brightness value to be displayed; The target cathode voltage value corresponding to the brightness value to be displayed is determined based on the cathode voltage compensation function. The display panel is driven to display the image at the brightness value to be displayed using the second target gamma voltage value and the target cathode voltage value.

10. A device for acquiring driving parameters of a display panel, characterized in that, The display panel includes sub-pixels with different emitting colors, and the cathodes of the sub-pixels with different emitting colors are disconnected from each other. The device includes: The first data acquisition module is used to acquire multiple first target gamma voltage values ​​corresponding to multiple target brightness values ​​within a target brightness level, wherein the gamma voltage values ​​represent the target brightness level within a first brightness level range. The first mapping module is used to determine the second target gamma voltage value of the sub-pixel under the brightness value to be displayed based on the plurality of first target gamma voltage values, wherein the brightness value to be displayed is within the brightness range of the second brightness level range, and the maximum brightness value of the second brightness level range is less than the maximum brightness value of the first brightness level range. The display enable module is used to drive the display panel to display using the second target gamma voltage value and the initial cathode voltage value, and to obtain the actual display parameters of the display panel; The voltage adjustment module is used to adjust the initial cathode voltage value if the actual display parameters do not conform to the target display parameters, so that the actual display parameters of the display panel based on the adjusted cathode voltage value conform to the target display parameters, and obtain the target cathode voltage value corresponding to the brightness value to be displayed; The system includes a function fitting module, wherein the second brightness level range includes n brightness values ​​to be displayed, and the target cathode voltage value includes n target cathode voltage values ​​that correspond one-to-one with the n brightness values ​​to be displayed, wherein the n brightness values ​​to be displayed are different, and n is an integer greater than or equal to 2; the function fitting module is used to fit a cathode voltage compensation function based on the initial cathode voltage value and the n target cathode voltage values, wherein the cathode voltage compensation function includes a function of the target cathode voltage value with respect to the brightness values ​​to be displayed.

11. A driver chip, characterized in that, For driving a display panel, the display panel includes sub-pixels with different emitting colors, the cathodes of the sub-pixels with different emitting colors being disconnected from each other, the driving chip includes: The second data acquisition module is used to acquire multiple first target gamma voltage values ​​corresponding to multiple target brightness values ​​within the target brightness level, and a cathode voltage compensation function. The cathode voltage compensation function includes a function of the target cathode voltage value with respect to the brightness value to be displayed. The target brightness level is in a first brightness level range, and the brightness value to be displayed is within the brightness range of the second brightness level range. The maximum brightness value of the second brightness level range is less than the maximum brightness value of the first brightness level range. The second mapping module is used to determine the second target gamma voltage value corresponding to the brightness value to be displayed based on the plurality of first target gamma voltage values; The voltage determination module is used to determine the target cathode voltage value corresponding to the brightness value to be displayed based on the cathode voltage compensation function. The display driving module is used to drive the display panel to display the image at the brightness value to be displayed using the second target gamma voltage value and the target cathode voltage value.

12. An electronic device, characterized in that, include: The processor and the memory storing computer program instructions, wherein the processor, when executing the computer program instructions, implements the method for obtaining driving parameters of the display panel as described in any one of claims 1 to 8, or implements the display driving method of the display panel as described in claim 9.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the method for obtaining driving parameters of the display panel as described in any one of claims 1 to 8, or the display driving method of the display panel as described in claim 9.

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