Driving method for display panel, and display terminal and computer-readable medium

Abstract

A driving method for a display panel, and a display terminal and a computer-readable medium. The driving method comprises: setting a correspondence curve between a display brightness value of a display brightness bar on a display panel and actual display brightness to be a hybrid logarithmic curve (S101); mapping, to each grayscale of the display panel in a high-brightness mode, a Gamma value corresponding to the display brightness value on the hybrid logarithmic curve, so as to obtain a Gamma curve of the display panel in the high-brightness mode (S102); and according to the requirements of a usage scenario, determining whether the display panel needs to start a high dynamic range image display mode (S104), wherein the Gamma curve in the high-brightness mode is a hybrid logarithmic Gamma curve. The driving method for a display panel can effectively improve the image quality performance of a low-brightness low-grayscale picture, and can also improve the contrast of the picture, thereby effectively improving the display effect of a high dynamic range image without increasing a redundant Gamma debugging duration.

Description

Display panel driving method, display terminal and computer readable medium Technical Field

[0001] The embodiments of the present disclosure belong to the field of display technology, and particularly relate to a display panel driving method, a display terminal, and a computer-readable medium. Background Art

[0002] OLED (Organic Light Emitting Diode), a new display product, boasts rich colors, fast response times, and foldability. It is gradually replacing LCD (Liquid Crystal Display) as the mainstream small and medium-sized display product. With the further development of OLED, the market is demanding higher standards for OLED in terms of lifespan, power consumption, and high-brightness mode.

[0003] Summary of the Invention

[0004] Embodiments of the present disclosure provide a display panel driving method, a display terminal, and a computer-readable medium. This display panel driving method can effectively improve the image quality and readability of low-brightness, low-grayscale images; it can also increase image contrast, thereby effectively enhancing the display effect of high dynamic range (HDR) images, without increasing the gamma tuning time (Gamma TT).

[0005] In a first aspect, an embodiment of the present disclosure provides a method for driving a display panel, comprising:

[0006] Setting the corresponding relationship curve between the display brightness value of the display brightness bar of the display panel and the actual display brightness to a mixed logarithmic curve;

[0007] Mapping the gamma value corresponding to the display brightness value on the mixed logarithmic curve to each grayscale in the high brightness mode of the display panel to obtain a gamma curve of the display panel in the high brightness mode;

[0008] The gamma curve in the high brightness mode is a mixed logarithmic gamma curve.

[0009] In some embodiments, the corresponding relationship curve between the display brightness value of the display panel display brightness bar and the actual display brightness is set to a mixed logarithmic curve, including:

[0010] A portion of the points corresponding to the display brightness values ​​on the corresponding relationship curve between the display brightness value and the actual display brightness is set as a binding point, and the actual display brightness and color coordinates of the binding point are gamma-calibrated to obtain the gamma value corresponding to the binding point; the setting of the binding point and the gamma calibration of the binding point can ensure that the difference between the actual display brightness of the display panel under the adjustment of the display brightness bar and the target display brightness is within 5%,

[0011] The gamma value corresponding to the other part of the display brightness values ​​that have not been gamma-calibrated is obtained by performing linear interpolation between two adjacent binding points.

[0012] In some embodiments, mapping the gamma value corresponding to the display brightness value on the hybrid logarithmic curve to each grayscale in the high brightness mode of the display panel to obtain the gamma curve of the display panel in the high brightness mode includes:

[0013] Calculating a mapping coefficient between the display brightness value and the grayscale according to the maximum display brightness value of the mixed logarithmic curve and the highest grayscale corresponding to the maximum display brightness value;

[0014] Calculating the grayscales corresponding to the other display brightness values ​​of the mixed logarithmic curve according to the mapping coefficients, thereby obtaining a mapping relationship between the display brightness values ​​of the mixed logarithmic curve in the high brightness mode and the grayscales;

[0015] According to the correspondence between the display brightness value and the gamma value of the mixed logarithmic curve, a mapping relationship between the gamma value corresponding to the display brightness value and the grayscale is obtained, thereby obtaining a gamma curve of the display panel in the high brightness mode;

[0016] The Gamma curve is a curve representing the relationship between the grayscale of the display panel and the actual display brightness.

[0017] In some embodiments, the two adjacent binding points are set as the first binding point and the second binding point.

[0018] The first binding point corresponds to a first Gamma value, and the second binding point corresponds to a second Gamma value.

[0019] There are multiple first display brightness values ​​that have not been gamma-calibrated between the first binding point and the second binding point, and the gamma value corresponding to each first display brightness value is set to X.

[0020] X can be calculated according to (the first display brightness value - the first binding point) / (X - the first gamma value) = (the second binding point - the first binding point) / (the second gamma value - the first gamma value).

[0021] In some embodiments, the display brightness value of the other part that has not been gamma-calibrated is any integer value between two adjacent binding points.

[0022] In some embodiments, the tie points include 0, 500, 1000, 1500, 2000, 2500, 3000, 3500, 4000 and 4095.

[0023] In some embodiments, the actual display brightness corresponding to the binding point 4095 is 1200 nit.

[0024] In some embodiments, the mapping coefficient between the display brightness value and the grayscale=the maximum display brightness value of the mixed logarithmic curve / the highest grayscale corresponding to the maximum display brightness value;

[0025] The grayscale corresponding to the other display brightness values ​​of the mixed logarithmic curve = the display brightness value / the mapping coefficient.

[0026] In some embodiments, the maximum display brightness value of the mixed logarithmic curve is 4095, and the highest grayscale corresponding to the maximum display brightness value is 255.

[0027] The mapping coefficient = 4095 / 255.

[0028] In some embodiments, the method further includes: storing the mixed logarithmic Gamma curve in the high brightness mode in a first memory, and storing the Gamma 2.2 curve in the high brightness mode in a second memory;

[0029] Determining whether the display panel needs to turn on a high dynamic range image display mode according to the requirements of the usage scenario;

[0030] If yes, calling the mixed logarithmic gamma curve in the high brightness mode in the first memory and writing it into the gamma register of the high brightness mode;

[0031] If not, the Gamma 2.2 curve in the high brightness mode in the second memory is called and written into the Gamma register of the high brightness mode.

[0032] In some embodiments, the Gamma 2.2 curve in the high brightness mode stored in the second memory is obtained by reading back default Gamma register information stored in a driver chip of the display panel.

[0033] In a second aspect, an embodiment of the present disclosure further provides a display terminal, comprising:

[0034] display panel,

[0035] a setting module configured to set a correspondence curve between the display brightness value of the display brightness bar of the display panel and the actual display brightness to a mixed logarithmic curve;

[0036] a mapping module configured to map the gamma value corresponding to the display brightness value on the mixed logarithmic curve to each grayscale in the high brightness mode of the display panel to obtain a gamma curve of the display panel in the high brightness mode;

[0037] The gamma curve in the high brightness mode is a mixed logarithmic gamma curve.

[0038] In some embodiments, further comprising:

[0039] A first memory configured to store a gamma curve in the high brightness mode;

[0040] a second memory configured to store a Gamma 2.2 curve in the high brightness mode;

[0041] a determination module configured to determine whether the display panel needs to turn on a high dynamic range image display mode according to the requirements of a usage scenario;

[0042] A calling module is configured to, when the judgment result of the judgment module is yes, call the gamma curve in the high-brightness mode in the first memory and write it into the gamma register of the high-brightness mode; when the judgment result of the judgment module is no, call the gamma 2.2 curve in the high-brightness mode in the second memory and write it into the gamma register of the high-brightness mode.

[0043] In some embodiments, a driver chip is further included, configured to store default Gamma register information.

[0044] The default Gamma register information is the Gamma 2.2 curve in the high brightness mode.

[0045] In a third aspect, the embodiments of the present disclosure further provide another display terminal, comprising:

[0046] one or more processors;

[0047] a storage device having one or more programs stored thereon;

[0048] When the one or more programs are executed by the one or more processors, the one or more processors are enabled to implement the above-mentioned driving method.

[0049] In a fourth aspect, an embodiment of the present disclosure further provides a computer-readable medium, on which a computer program is stored, and the program implements the above-mentioned driving method when executed by a processor.

[0050] Beneficial effects of the present invention: The display panel driving method provided by the embodiment of the present disclosure, by setting the correspondence curve between the display brightness value of the display brightness bar of the display panel and the actual display brightness to a hybrid logarithmic curve, can enable low-brightness and low-grayscale images to undergo Gamma adjustment through more nodes, so that the Gamma value of the low-brightness and low-grayscale images is more accurate, thereby making the brightness and chromaticity accuracy of the low-brightness and low-grayscale images higher, effectively improving the image quality performance of the low-brightness and low-grayscale images, and improving the image quality readability of the low-brightness and low-grayscale images; by mapping the Gamma value corresponding to the display brightness value on the hybrid logarithmic curve to each grayscale in the high-brightness mode of the display panel, to obtain the Gamma curve of the display panel in the high-brightness mode, the brightness contrast of the image with the same grayscale driven by the hybrid logarithmic Gamma curve in this embodiment is significantly higher than that of the image driven by the current Gamma 2.2 curve-driven picture, so the picture driven by the hybrid logarithmic gamma curve in this embodiment has higher contrast and better performance in high dynamic range image (HDR) display, which can effectively improve the display effect of high dynamic range image (HDR) without increasing unnecessary gamma debugging time (Gamma TT).

[0051] The display terminal provided by the embodiment of the present disclosure, by setting a setting module, can enable low-brightness, low-grayscale images to undergo gamma adjustment through more nodes, making the gamma value of the low-brightness, low-grayscale images more accurate, thereby increasing the brightness and chromaticity accuracy of the low-brightness, low-grayscale images, effectively improving the image quality performance of the low-brightness, low-grayscale images, and improving the image quality readability of the low-brightness, low-grayscale images; by setting a mapping module, for images of the same grayscale, the brightness contrast of the images driven by the hybrid logarithmic gamma curve in this embodiment is significantly higher than that of the images driven by the current gamma 2.2 curve, so that the images driven by the hybrid logarithmic gamma curve in this embodiment have higher contrast and better performance in high dynamic range image (HDR) display, thereby effectively improving the display effect of high dynamic range image (HDR) without increasing unnecessary gamma debugging time (Gamma TT). BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing the detailed exemplary embodiments with reference to the accompanying drawings, in which:

[0053] FIG1 is a flow chart of a display panel driving method according to an embodiment of the present disclosure.

[0054] FIG2 is a schematic diagram of a mixed logarithmic curve obtained through step S101 in an embodiment of the present disclosure.

[0055] FIG3 is a schematic diagram showing the comparison between the mixed logarithmic curve and the Gamma 2.2 curve.

[0056] FIG4 is a schematic diagram showing a comparison of the effects of a mixed logarithmic curve and a Gamma 2.2 curve on some grayscales.

[0057] FIG5 is a schematic diagram of a hybrid logarithmic gamma curve of a display panel in a high brightness mode obtained through step S102 in an embodiment of the present disclosure.

[0058] Figure 6 is a comparison of the brightness difference between the mixed logarithmic gamma curve and the gamma 2.2 curve at the same grayscale.

[0059] Figure 7 is a comparison of the effects of the same image displayed using a mixed logarithmic gamma curve and a gamma 2.2 curve.

[0060] FIG8 is a principle block diagram of a display terminal provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0061] To enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, a display panel driving method, a display terminal, and a computer-readable medium provided by the embodiments of the present disclosure are further described in detail below with reference to the accompanying drawings and specific implementation plans.

[0062] The embodiments of the present disclosure will be described more fully below with reference to the accompanying drawings, but the illustrated embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully enable those skilled in the art to understand the scope of this disclosure.

[0063] The embodiments of the present disclosure are not limited to the embodiments shown in the drawings, but include modifications of the configurations formed based on the manufacturing process. Therefore, the regions illustrated in the drawings are schematic in nature, and the shapes of the regions shown in the drawings illustrate specific shapes of the regions, but are not intended to be limiting.

[0064] The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0065] The terms "a", "an", "the", "said" 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 express open-ended inclusion and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used only as labels and are not intended to limit the quantity of their objects.

[0066] HDR (High-Dynamic Range) provides greater dynamic range and detail than standard images. This means that an image displays both the brightest and darkest areas simultaneously, making bright areas brighter and dark areas darker. HDR colors are closer to the human eye's true perception, providing a more realistic and immersive picture quality experience.

[0067] Currently, display module consumers are not only pursuing higher brightness and wider display ranges, but also increasingly demanding higher image quality in low brightness and low grayscale due to the increasing use of "night mode." HDR appears closer to reality than SDR (Standard Dynamic Range) in terms of light-dark contrast and color gradation, with superior shadow and highlight detail. Table 1 compares HDR and SDR image display parameters.

[0068] Table 1

[0069] Achieving ultra-high and ultra-low brightness is no longer a technical challenge for current display technology, especially OLED display modules. The challenge lies in distinguishing high and low brightness within the same image, improving the contrast of the image quality content, and expanding the brightness and color display range. Existing display modules all display images according to the Gamma 2.2 curve. However, with today's increasingly demanding image quality, the contrast between different grayscales displayed according to the Gamma 2.2 curve is no longer sufficient to meet the current HDR image quality requirements. A new grayscale brightness distribution curve is needed to meet current HDR image quality demands.

[0070] In order to solve the problem that the grayscale brightness distribution curve of the existing Gamma 2.2 curve is difficult to meet people's current demand for HDR image quality, firstly, an embodiment of the present disclosure provides a method for driving a display panel. Referring to Figure 1, there is a flow chart of the display panel driving method in the embodiment of the present disclosure; wherein, the display panel driving method includes: step S101: setting the correspondence curve between the display brightness value (DBV, Display Brightness Value) of the display brightness bar of the display panel and the actual display brightness to a mixed logarithmic curve.

[0071] Step S102: Mapping the gamma value corresponding to the brightness value displayed on the hybrid logarithmic curve to each grayscale in the high brightness mode of the display panel to obtain the gamma curve of the display panel in the high brightness mode; the gamma curve in the high brightness mode is a hybrid logarithmic gamma curve (HLG, Hybrid Log Gamma).

[0072] This display panel driving method, by setting the correspondence curve between the display brightness value of the display brightness bar of the display panel and the actual display brightness to a hybrid logarithmic curve, can enable low-brightness, low-grayscale images to undergo gamma adjustment through more nodes, making the gamma value of the low-brightness, low-grayscale images more accurate, thereby improving the brightness and chromaticity accuracy of the low-brightness, low-grayscale images, effectively improving the image quality and readability of the low-brightness, low-grayscale images. The gamma value corresponding to the display brightness value on the hybrid logarithmic curve is mapped to each grayscale in the high-brightness mode of the display panel to obtain the gamma curve of the display panel in high-brightness mode. For images of the same grayscale, images driven using the hybrid logarithmic gamma curve in this embodiment have significantly higher brightness contrast than images driven using the current gamma 2.2 curve. Therefore, the images driven using the hybrid logarithmic gamma curve in this embodiment have higher contrast and better performance in high dynamic range (HDR) image display, thereby effectively improving the display effect of high dynamic range (HDR) images without increasing unnecessary gamma tuning time (Gamma TT).

[0073] In some embodiments, step S101: a curve representing the correspondence between the display brightness value (DBV) of a display brightness bar on a display panel and the actual display brightness is set as a mixed logarithmic curve, including: setting points corresponding to a portion of the display brightness values ​​on the curve representing the correspondence between the display brightness value and the actual display brightness as bands, performing gamma calibration on the actual display brightness and color coordinates of the bands, and obtaining gamma values ​​corresponding to the bands. The setting and gamma calibration of the bands can ensure that the difference between the actual display brightness of the display panel under adjustment of the display brightness bar and the target display brightness is within 5%.

[0074] By performing linear interpolation between two adjacent binding points, the gamma value corresponding to the other part of the display brightness value that has not been gamma calibrated is obtained.

[0075] The brightness and color coordinates of the gamma-calibrated display brightness value (DBV) are closer to the expected values, effectively improving the brightness and color accuracy of low-brightness, low-grayscale images. The brightness values ​​of the other part that have not undergone gamma calibration are obtained by linear interpolation between two adjacent binding points, so that the brightness and color coordinates of the non-gamma-calibrated display brightness values ​​are closer to the expected values, effectively improving the brightness and color accuracy of low-brightness, low-grayscale images.

[0076] In some embodiments, two adjacent binding points are assumed to be the first binding point and the second binding point, the first binding point corresponds to the first Gamma value, the second binding point corresponds to the second Gamma value, and there are multiple first display brightness values ​​that have not been gamma-calibrated between the first binding point and the second binding point. The Gamma value corresponding to each first display brightness value is set to X, then according to (first display brightness value-first binding point) / (X-first Gamma value)=(second binding point-first binding point) / (second Gamma value-first Gamma value), X can be calculated.

[0077] Referring to Table 2, if display brightness values ​​(DBV) 1500 and 2000 are adjacent binding points, the gamma values ​​corresponding to these two binding points are both gamma values ​​obtained through gamma calibration. The first display brightness value 1800 is a display brightness value between 1500 and 2000 that has not undergone gamma calibration. The gamma value corresponding to the first display brightness value 1800 can be obtained by linearly interpolating the gamma values ​​corresponding to binding points 1500 and 2000. Similarly, other first display brightness values ​​that have not undergone gamma calibration can be obtained by linearly interpolating their adjacent gamma-calibrated binding points.

[0078] Table 2

[0079] In some embodiments, the brightness values ​​of another portion of the display that has not been gamma-calibrated are any integer values ​​between two adjacent binding points.

[0080] 2 is a schematic diagram of a mixed logarithmic curve obtained by step S101 in an embodiment of the present disclosure, wherein the binding points include 0, 500, 1000, 1500, 2000, 2500, 3000, 3500, 4000, and 4095. The actual display brightness corresponding to the binding point 4095 is 1200 nit.

[0081] Referring to Figure 3, which is a schematic diagram comparing the hybrid logarithmic curve and the Gamma 2.2 curve; Figure 4 is a schematic diagram comparing the effects of some grayscales of the hybrid logarithmic curve and the Gamma 2.2 curve; it can be seen that the hybrid logarithmic curve has a wider distribution of display brightness values ​​at low brightness, that is, the hybrid logarithmic curve has more display brightness value binding points and linear interpolations at low brightness, because more display brightness values ​​at low brightness are gamma-calibrated and linearly interpolated, resulting in higher brightness and chromaticity accuracy in low-brightness images.

[0082] In some embodiments, step S102: mapping the gamma value corresponding to the display brightness value on the hybrid logarithmic curve to each grayscale in the high brightness mode (HBM) of the display panel to obtain the gamma curve of the display panel in the high brightness mode, including: calculating the mapping coefficient between the display brightness value and the grayscale based on the maximum display brightness value of the hybrid logarithmic curve and the highest grayscale corresponding to the maximum display brightness value.

[0083] Grayscales corresponding to other display brightness values ​​of the mixed logarithmic curve are calculated according to the mapping coefficients, thereby obtaining a mapping relationship between the display brightness values ​​of the mixed logarithmic curve and the grayscales in the high brightness mode.

[0084] Based on the correspondence between the display brightness value and the gamma value of the mixed logarithmic curve, the mapping relationship between the gamma value corresponding to the display brightness value and the grayscale is obtained, thereby obtaining the gamma curve of the display panel in high brightness mode; the gamma curve is the relationship curve between the grayscale of the display panel and the actual display brightness.

[0085] In some embodiments, the mapping coefficient between display brightness value and grayscale = maximum display brightness value of the mixed logarithmic curve / highest grayscale corresponding to the maximum display brightness value; the grayscale corresponding to other display brightness values ​​of the mixed logarithmic curve = display brightness value / mapping coefficient.

[0086] In some embodiments, referring to FIG5 , a schematic diagram of a hybrid logarithmic gamma curve of a display panel in high brightness mode obtained in step S102 in the present disclosure is shown. As shown in Table 3, the maximum display brightness value of the hybrid logarithmic curve is 4095, the highest grayscale corresponding to the maximum display brightness value is 255, and the mapping coefficient = 4095 / 255.

[0087] Table 3

[0088] Referring to Figures 6 and 7, Figure 6 compares the brightness difference between a hybrid logarithmic gamma curve and a gamma 2.2 curve at the same grayscale, while Figure 7 compares the display effects of the hybrid logarithmic gamma curve and the gamma 2.2 curve on the same image. It can be seen that the hybrid logarithmic gamma curve exhibits a more pronounced luminance difference ΔL than the gamma 2.2 curve when displaying any grayscale. This indicates that the hybrid logarithmic gamma curve offers higher contrast at any grayscale, resulting in better performance for high dynamic range (HDR) image display. Figure 6 demonstrates the image quality contrast difference between the hybrid logarithmic gamma curve and the gamma 2.2 curve, with the hybrid logarithmic gamma curve exhibiting significantly higher contrast than the gamma 2.2 curve. Figure 7 compares the display effects of the hybrid logarithmic gamma curve and the gamma 2.2 curve, showing that the hybrid logarithmic gamma curve exhibits significantly better HDR image display.

[0089] In some embodiments, referring to FIG. 1 , the method for driving a display panel further includes: step S103 : storing the mixed logarithmic Gamma curve in the high brightness mode in the first memory, and storing the Gamma 2.2 curve in the high brightness mode in the second memory.

[0090] Step S104: determining whether the display panel needs to enable a high dynamic range image display mode according to the requirements of the usage scenario.

[0091] This step can be manually judged and selected.

[0092] If yes, step S105 is executed: the mixed logarithmic gamma curve in the high brightness mode in the first memory is called and written into the gamma register of the high brightness mode, thereby realizing the display of the high dynamic range image mode (HDR mode) of the display panel.

[0093] If not, step S106 is executed: calling the Gamma 2.2 curve in the high brightness mode in the second memory and writing it into the Gamma register of the high brightness mode, thereby realizing the display of the normal mode (i.e., standard dynamic range image mode, SDR mode) of the display panel.

[0094] In some embodiments, the Gamma 2.2 curve in high brightness mode stored in the second memory is obtained by reading back the default Gamma register information stored in the driver chip of the display panel. That is, the Gamma 2.2 curve in high brightness mode is stored in the Gamma register in the driver chip by default.

[0095] Confirmation of the use of the display panel driving method in the embodiment of the present disclosure: adjust the display brightness bar of the display panel under test, test the display brightness of the picture at different brightness bar positions, such as testing the display brightness of the picture corresponding to the brightness bar positions of 1 / 10, 2 / 10, 3 / 10...10 / 10, and then fit the relationship curve between the display brightness value and the actual display brightness, and finally confirm whether the relationship curve is a mixed logarithmic curve.

[0096] Adjust the tested display panel to high dynamic range (HDR) mode, switch grayscale from 0 to 255 in sequence, test the actual display brightness corresponding to different grayscales, then fit a relationship curve between the 0 to 255 grayscale and the actual display brightness, and finally confirm whether the relationship curve is a mixed logarithmic gamma curve.

[0097] The display panel driving method provided by the disclosed embodiments sets the correspondence curve between the display brightness value of the display brightness bar of the display panel and the actual display brightness as a hybrid logarithmic curve. This allows low-brightness, low-grayscale images to undergo gamma adjustment through more nodes, resulting in more accurate gamma values ​​for the low-brightness, low-grayscale images. This improves the brightness and chromaticity accuracy of the low-brightness, low-grayscale images, effectively improving the image quality and readability of the low-brightness, low-grayscale images. The gamma values ​​corresponding to the display brightness values ​​on the hybrid logarithmic curve are mapped to the various grayscales in the high-brightness mode of the display panel to obtain the gamma curve for the display panel in high-brightness mode. For images of the same grayscale, images driven using the hybrid logarithmic gamma curve of this embodiment have significantly higher brightness contrast than images driven using the current gamma 2.2 curve. Therefore, images driven using the hybrid logarithmic gamma curve in this embodiment have higher contrast and better performance in high dynamic range (HDR) display. This effectively improves the display effect of high dynamic range (HDR) images without increasing the gamma tuning time (Gamma TT).

[0098] In the second aspect, the embodiment of the present disclosure also provides a display terminal. Referring to Figure 8, which is a principle block diagram of the display terminal provided in the embodiment of the present disclosure, the display terminal includes: a display panel 1, a setting module 2, configured to set the correspondence curve between the display brightness value of the display brightness bar of the display panel 1 and the actual display brightness to a mixed logarithmic curve; a mapping module 3, configured to map the Gamma value corresponding to the display brightness value on the mixed logarithmic curve to each grayscale in the high brightness mode of the display panel 1 to obtain the Gamma curve of the display panel 1 in the high brightness mode; the Gamma curve in the high brightness mode is a mixed logarithmic Gamma curve.

[0099] In some embodiments, referring to Figure 8, the display terminal also includes: a first memory 4, configured to store the Gamma curve in high brightness mode; a second memory 5, configured to store the Gamma 2.2 curve in high brightness mode; a judgment module 6, configured to judge whether the display panel 1 needs to turn on the high dynamic range image display mode according to the requirements of the usage scenario; a calling module 7, configured to call the Gamma curve in high brightness mode in the first memory 4 and write it into the Gamma register of the high brightness mode when the judgment result of the judgment module 6 is yes; when the judgment result of the judgment module 6 is no, call the Gamma 2.2 curve in high brightness mode in the second memory 5 and write it into the Gamma register of the high brightness mode.

[0100] In some embodiments, referring to FIG. 8 , the display terminal further includes a driver chip 8 configured to store default Gamma register information, where the default Gamma register information is a Gamma 2.2 curve in a high brightness mode.

[0101] The display terminal provided by the embodiment of the present disclosure, by setting a setting module, can enable low-brightness, low-grayscale images to undergo gamma adjustment through more nodes, making the gamma value of the low-brightness, low-grayscale images more accurate, thereby increasing the brightness and chromaticity accuracy of the low-brightness, low-grayscale images, effectively improving the image quality performance of the low-brightness, low-grayscale images, and improving the image quality readability of the low-brightness, low-grayscale images; by setting a mapping module, for images of the same grayscale, the brightness contrast of the images driven by the hybrid logarithmic gamma curve in this embodiment is significantly higher than that of the images driven by the current gamma 2.2 curve, so that the images driven by the hybrid logarithmic gamma curve in this embodiment have higher contrast and better performance in high dynamic range image (HDR) display, thereby effectively improving the display effect of high dynamic range image (HDR) without increasing unnecessary gamma debugging time (Gamma TT).

[0102] In a third aspect, an embodiment of the present disclosure provides a display terminal, which includes: one or more processors; a storage device on which one or more programs are stored; when the one or more programs are executed by one or more processors, the one or more processors implement the driving method in the above embodiment.

[0103] The display terminal provided in the embodiments of the present disclosure may be any product or component with a display function, such as an OLED panel, an OLED TV, an OLED billboard, a display, a mobile phone, or a navigator.

[0104] In a fourth aspect, an embodiment of the present disclosure further provides a computer-readable medium, on which a computer program is stored, and when the program is executed by a processor, the driving method in the above embodiment is implemented.

[0105] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A method for driving a display panel, wherein: include: The corresponding relationship curve between the display brightness value of the display brightness bar of the display panel and the actual display brightness is set to a mixed logarithmic curve; Mapping the Gamma value corresponding to the display brightness value on the mixed logarithmic curve to each grayscale in the high brightness mode of the display panel to obtain the Gamma curve of the display panel in the high brightness mode; The gamma curve in the high brightness mode is a mixed logarithmic gamma curve.

2. The method for driving a display panel according to claim 1, wherein: The corresponding relationship curve between the display brightness value of the display brightness bar of the display panel and the actual display brightness is set as a mixed logarithmic curve, including: A portion of points corresponding to the display brightness values ​​on the corresponding relationship curve between the display brightness value and the actual display brightness are set as binding points, and the actual display brightness and color coordinates of the binding points are subjected to Gamma calibration to obtain the Gamma value corresponding to the binding point; the setting of the binding point and the Gamma calibration of the binding point can make the difference between the actual display brightness of the display panel under the adjustment of the display brightness bar and the target display brightness within 5%, The gamma value corresponding to the other part of the display brightness value that has not been gamma-calibrated is obtained by performing linear interpolation between two adjacent binding points.

3. The method for driving a display panel according to claim 2, wherein: The step of mapping the gamma value corresponding to the display brightness value on the mixed logarithmic curve to each grayscale in the high brightness mode of the display panel to obtain the gamma curve of the display panel in the high brightness mode includes: According to the maximum display brightness value of the mixed logarithmic curve and the maximum display brightness value Calculate the mapping coefficient between the display brightness value and the grayscale according to the corresponding highest grayscale; Calculate the grayscales corresponding to the other display brightness values ​​of the mixed logarithmic curve according to the mapping coefficient, so as to obtain a mapping relationship between the display brightness value of the mixed logarithmic curve in the high brightness mode and the grayscale; According to the corresponding relationship between the display brightness value and the Gamma value of the mixed logarithmic curve, a mapping relationship between the Gamma value corresponding to the display brightness value and the grayscale is obtained, so as to obtain the Gamma curve of the display panel in the high brightness mode; The Gamma curve is a relationship curve between the grayscale of the display panel and the actual display brightness.

4. The method for driving a display panel according to claim 2, wherein: Assume that the two adjacent binding points are the first binding point and the second binding point, The first binding point corresponds to a first Gamma value, and the second binding point corresponds to a second Gamma value. There are multiple first display brightness values ​​that have not been gamma-calibrated between the first binding point and the second binding point, and the gamma value corresponding to each of the first display brightness values ​​is set to X. Then, X can be calculated according to (the first display brightness value-the first binding point) / (X-the first gamma value)=(the second binding point-the first binding point) / (the second gamma value-the first gamma value).

5. The method for driving a display panel according to claim 4, wherein: The display brightness value of the other part that has not been gamma-calibrated is any integer value between two adjacent binding points.

6. The method for driving a display panel according to claim 5, wherein: The binding points include 0, 500, 1000, 1500, 2000, 2500, 3000, 3500, 4000 and 4095.

7. The method for driving a display panel according to claim 6, wherein: The actual display brightness corresponding to the binding point 4095 is 1200 nit.

8. The method for driving a display panel according to claim 3, wherein: The mapping coefficient between the display brightness value and the grayscale=the maximum display brightness value of the mixed logarithmic curve / the highest grayscale corresponding to the maximum display brightness value; The grayscale corresponding to the other display brightness values ​​of the mixed logarithmic curve=the display brightness value / the mapping coefficient.

9. The method for driving a display panel according to claim 8, wherein: The maximum display brightness value of the mixed logarithmic curve is 4095, and the highest grayscale corresponding to the maximum display brightness value is 255. The mapping coefficient=4095 / 255.

10. The method for driving a display panel according to any one of claims 1 to 9, wherein: The method further includes: storing the mixed logarithmic Gamma curve in the high brightness mode in a first memory, and storing the Gamma 2.2 curve in the high brightness mode in a second memory; Determining whether the display panel needs to turn on a high dynamic range image display mode according to the requirements of the usage scenario; If yes, calling the mixed logarithmic gamma curve in the high brightness mode in the first memory and writing it into the gamma register of the high brightness mode; If not, the Gamma 2.2 curve in the high brightness mode in the second memory is called and written into the Gamma register of the high brightness mode.

11. The method for driving a display panel according to claim 10, wherein: The Gamma 2.2 curve in the high brightness mode stored in the second memory is obtained by reading back the default Gamma register information stored inside the driving chip of the display panel.

12. A display terminal, wherein: include: Display panel, A setting module, configured to set a corresponding relationship curve between the display brightness value of the display brightness bar of the display panel and the actual display brightness to a mixed logarithmic curve; A mapping module configured to map the gamma value corresponding to the display brightness value on the mixed logarithmic curve to each grayscale in the high brightness mode of the display panel to obtain a gamma curve of the display panel in the high brightness mode; The gamma curve in the high brightness mode is a mixed logarithmic gamma curve.

13. The display terminal according to claim 12, wherein: Also includes: A first memory configured to store a gamma curve in the high brightness mode; A second memory is configured to store a Gamma 2.2 curve in the high brightness mode; A determination module configured to determine whether the display panel needs to turn on a high dynamic range image display mode according to the requirements of the usage scenario; a calling module configured to call the gamma curve in the high brightness mode in the first memory and write it into the gamma register of the high brightness mode when the judgment result of the judgment module is yes; and to call the gamma curve in the high brightness mode in the second memory when the judgment result of the judgment module is no. 2.2 curve and write it into the Gamma register of the high brightness mode.

14. The display terminal according to claim 13, wherein: Also included is a driver chip configured to store default Gamma register information, The default Gamma register information is the Gamma 2.2 curve in the high brightness mode.

15. A display terminal, wherein: include: one or more processors; a storage device having one or more programs stored thereon; When the one or more programs are executed by the one or more processors, the one or more processors implement the driving method according to any one of claims 1 to 11.

16. A computer readable medium, wherein: A computer program is stored thereon, and when the program is executed by a processor, the driving method as described in any one of claims 1 to 11 is implemented.

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