Driving method of display panel, display terminal and computer readable medium

Abstract

The driving method of the display panel comprises the following steps: setting a corresponding relation curve between a display brightness value of a display brightness strip of the display panel and actual display brightness as a mixed logarithmic curve; mapping a Gamma value corresponding to the display brightness value on the mixed logarithmic curve to each gray scale of the display panel in a high-brightness mode 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 type Gamma curve. According to the driving method of the display panel, the image quality performance of a low-brightness and low-gray-scale image can be effectively improved, and the image quality readability of the low-brightness and low-gray-scale image is improved; and meanwhile, the picture contrast can be improved, so that the display effect of a high dynamic range (HDR) image can be effectively improved, and redundant Gamma debugging time does not need to be increased.

Description

Technical Field

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

[0002] As a new type of display product, OLED (Organic Light Emitting Diode) has the advantages of rich colors, fast response time, and foldability. Now OLED is gradually replacing LCD (Liquid Crystal Display) to become the mainstream small and medium-sized display product. With the further development of OLED, the market has higher and higher requirements for OLED in terms of lifespan, power consumption, high brightness mode, etc. Summary of the invention

[0003] The embodiments of the present disclosure provide a display panel driving method, a display terminal and a computer-readable medium. The display panel driving method can effectively improve the image quality performance of low-brightness and low-grayscale images, and improve the image quality readability of low-brightness and low-grayscale images; at the same time, it can improve the image contrast, thereby effectively improving the display effect of high dynamic range images (HDR), and at the same time, there is no need to increase unnecessary Gamma debugging time (Gamma TT).

[0004] In a first aspect, an embodiment of the present disclosure provides a method for driving a display panel, comprising:

[0005] 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;

[0006] 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;

[0007] The gamma curve in the high brightness mode is a mixed logarithmic gamma curve.

[0008] In some embodiments, 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:

[0009] 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%,

[0010] 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.

[0011] In some embodiments, 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:

[0012] 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;

[0013] 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;

[0014] 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;

[0015] The Gamma curve is a relationship curve between the grayscale of the display panel and the actual display brightness.

[0016] In some embodiments, two adjacent binding points are set as a first binding point and a second binding point.

[0017] The first binding point corresponds to a first Gamma value, and the second binding point corresponds to a second Gamma value.

[0018] 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.

[0019] 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).

[0020] 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.

[0021] In some embodiments, the tie points include 0, 500, 1000, 1500, 2000, 2500, 3000, 3500, 4000 and 4095.

[0022] In some embodiments, the actual display brightness corresponding to the binding point 4095 is 1200 nit.

[0023] 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;

[0024] The grayscale corresponding to the other display brightness values ​​of the mixed logarithmic curve=the display brightness value / the mapping coefficient.

[0025] 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.

[0026] The mapping coefficient=4095 / 255.

[0027] 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;

[0028] Determining whether the display panel needs to turn on a high dynamic range image display mode according to the requirements of the usage scenario;

[0029] 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;

[0030] 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.

[0031] In some embodiments, the Gamma2.2 curve in the high brightness mode stored in the second memory is obtained by reading back the default Gamma register information stored inside the driver chip of the display panel.

[0032] In a second aspect, an embodiment of the present disclosure further provides a display terminal, which includes:

[0033] Display panel,

[0034] 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;

[0035] 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;

[0036] The gamma curve in the high brightness mode is a mixed logarithmic gamma curve.

[0037] In some embodiments, it also includes:

[0038] A first memory configured to store a gamma curve in the high brightness mode;

[0039] A second memory is configured to store a Gamma 2.2 curve in the high brightness mode;

[0040] 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;

[0041] A calling module is 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 2.2 curve in the high brightness mode in the second memory and write it into the Gamma register of the high brightness mode when the judgment result of the judgment module is no.

[0042] In some embodiments, a driver chip is further included, configured to store default Gamma register information.

[0043] The default Gamma register information is the Gamma 2.2 curve in the high brightness mode.

[0044] In a third aspect, the embodiment of the present disclosure also provides another display terminal, which includes:

[0045] one or more processors;

[0046] a storage device having one or more programs stored thereon;

[0047] 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.

[0048] In a fourth aspect, an embodiment of the present disclosure further provides a computer-readable medium, wherein a computer program is stored thereon, and the program implements the above-mentioned driving method when executed by a processor.

[0049] Beneficial effects of the present invention: The display panel driving method provided by the embodiment of the present invention, by 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, can make the low-brightness and low-grayscale picture undergo Gamma adjustment through more nodes, so that the Gamma value of the low-brightness and low-grayscale picture is more accurate, thereby making the brightness and chromaticity accuracy of the low-brightness and low-grayscale picture higher, effectively improving the image quality performance of the low-brightness and low-grayscale picture, and improving the image quality readability of the low-brightness and low-grayscale picture; by 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, so as to obtain the Gamma curve of the display panel in the high-brightness mode, the picture of the same grayscale, the picture driven by the mixed logarithmic Gamma curve in this embodiment, its brightness contrast is significantly higher than that of the picture 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).

[0050] The display terminal provided in the embodiment of the present disclosure can adjust the Gamma of a low-brightness and low-grayscale picture through more nodes by setting a setting module, so that the Gamma value of the low-brightness and low-grayscale picture is more accurate, thereby making the brightness and chromaticity accuracy of the low-brightness and low-grayscale picture higher, effectively improving the image quality performance of the low-brightness and low-grayscale picture, and improving the image quality readability of the low-brightness and low-grayscale picture; by setting a mapping module, for a picture of the same grayscale, the brightness contrast of the picture driven by the hybrid logarithmic Gamma curve in the present embodiment is significantly higher than that of the picture driven by the current Gamma 2.2 curve, so that the picture driven by the hybrid logarithmic Gamma curve in the present embodiment has a higher contrast and better performance in the high dynamic range image (HDR) display, thereby effectively improving the display effect of the high dynamic range image (HDR) without increasing the redundant Gamma debugging time (Gamma TT). BRIEF DESCRIPTION OF THE DRAWINGS

[0051] 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 detailed example embodiments with reference to the accompanying drawings, in which:

[0052] Figure 1 Flow chart of a display panel driving method in an embodiment of the present disclosure.

[0053] Figure 2 Schematic diagram of a mixed logarithmic curve obtained through step S101 in an embodiment of the present disclosure.

[0054] Figure 3 Schematic diagram for comparison between the mixed logarithmic curve and the Gamma 2.2 curve.

[0055] Figure 4 This is a schematic diagram comparing the effects of some grayscales of the mixed logarithmic curve and the Gamma 2.2 curve.

[0056] Figure 5 Schematic diagram of a mixed logarithmic Gamma curve of a display panel in a high brightness mode obtained through step S102 in an embodiment of the present disclosure.

[0057] Figure 6 This is a comparison chart of the brightness difference between the mixed logarithmic Gamma curve and the Gamma 2.2 curve at the same grayscale.

[0058] Figure 7 This is a comparison chart of the effects of using a mixed logarithmic gamma curve and a gamma 2.2 curve for the same image.

[0059] Figure 8 It is a principle block diagram of the display terminal provided in the embodiment of the present disclosure. DETAILED DESCRIPTION

[0060] In order 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 in conjunction with the accompanying drawings and specific implementation methods.

[0061] The embodiments of the present disclosure will be described more fully below with reference to the accompanying drawings, but the embodiments shown may be embodied in different forms and should not be construed as being limited to the embodiments set forth in the present disclosure. On the contrary, the purpose of providing these embodiments is to make the present disclosure thorough and complete and to enable those skilled in the art to fully understand the scope of the present disclosure.

[0062] 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 have schematic properties, and the shapes of the regions shown in the drawings illustrate the specific shapes of the regions, but are not intended to be limiting.

[0063] 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.

[0064] 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 an open-ended inclusive meaning and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used merely as labels and are not intended to limit the quantity of their objects.

[0065] HDR (High-Dynamic Range, HDR for short) is a high dynamic range image. Compared with ordinary images, it can provide more dynamic range and image details. It means that a picture can show the brightest and darkest areas at the same time as much as possible, making the bright areas brighter and the dark areas darker. The colors displayed by HDR are closer to the real perception of the human eye, so HDR provides a more realistic and immersive picture quality experience.

[0066] At present, in addition to the pursuit of higher brightness and wider display range, consumers of display modules are also increasingly demanding low-brightness and low-grayscale image quality due to the increasing demand for the use of "night mode". In terms of light and dark contrast and color levels, HDR looks closer to reality than SDR (Standard Dynamic Range), and the details of the shadow part and the highlights are also more outstanding. Refer to Table 1 for a comparison of HDR image display parameters and SDR image display parameters.

[0067] Table 1

[0068] SDR HDR Content brightness level 0-100nits 0-1000nits Content color depth 8,10nits 10,12 bits Display peak brightness Typ.300nits Typ.1000nits Display darkness 0.5nits 0.1-0.001 Contrast 1000∶1 100000∶1

[0069] The current display technology, especially the OLD display module, is no longer a technical problem to achieve ultra-high brightness and ultra-low brightness. The difficulty lies in how to distinguish high brightness from low brightness in the same picture, improve the contrast of the picture quality content in the picture, and improve the display range of brightness and color. The pictures of existing display modules are displayed according to the Gamma 2.2 curve. However, with the increasingly high requirements for picture quality today, the contrast between different grayscales of the pictures displayed according to the Gamma 2.2 curve is difficult to meet the existing HDR picture quality requirements. It is necessary to find a new grayscale brightness distribution curve to meet the current people's demand for HDR picture quality.

[0070] In order to solve the problem that the grayscale brightness distribution curve of the existing Gamma 2.2 curve is difficult to meet the current demand for HDR image quality, in the first aspect, the embodiment of the present disclosure provides a display panel driving method, referring to Figure 1 , which 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 corresponding relationship curve between the display brightness value (DBV, Display Brightness Value) of the display panel display brightness bar and the actual display brightness to a mixed logarithmic curve.

[0071] Step S102: Map 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] The display panel driving method sets the corresponding relationship 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, so that the low-brightness and low-grayscale picture can be Gamma-adjusted through more nodes, so that the Gamma value of the low-brightness and low-grayscale picture is more accurate, so that the brightness and chromaticity accuracy of the low-brightness and low-grayscale picture is higher, and the picture quality performance of the low-brightness and low-grayscale picture is effectively improved, and the picture quality readability of the low-brightness and low-grayscale picture is improved; 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, so as to obtain the Gamma curve of the display panel in the high-brightness mode, for a picture of the same grayscale, the picture driven by the hybrid logarithmic Gamma curve in this embodiment has a brightness contrast that is significantly higher than that of the picture driven by the current Gamma2.2 curve, so that the picture driven by the hybrid logarithmic Gamma curve in this embodiment has a higher contrast and better performance in the high dynamic range image (HDR) display, thereby effectively improving the display effect of the high dynamic range image (HDR) and no unnecessary Gamma debugging time (Gamma TT) is required.

[0073] In some embodiments, step S101: setting the correspondence curve between the display brightness value (DBV) of the display brightness bar of the display panel and the actual display brightness to a mixed logarithmic curve, including: setting a point corresponding to a part of the display brightness value on the correspondence curve between the display brightness value and the actual display brightness as a binding point (band), performing gamma calibration on the actual display brightness and color coordinates of the binding point, and obtaining 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%.

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

[0076] In some embodiments, two adjacent binding points are assumed to be a first binding point and a second binding point, the first binding point corresponds to a first gamma value, 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 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 the display brightness values ​​(DBV) 1500 and 2000 are two adjacent binding points, the gamma values ​​corresponding to the two binding points are 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, and the gamma value corresponding to the first display brightness value 1800 can be obtained by linear interpolation of the gamma values ​​corresponding to the binding points 1500 and 2000. Similarly, other first display brightness values ​​that have not undergone gamma calibration can be obtained by linear interpolation of their adjacent gamma-calibrated binding points.

[0078] Table 2

[0079]

[0080] In some embodiments, another portion of display brightness values ​​that have not been subjected to gamma calibration is any integer value between two adjacent binding points.

[0081] Reference Figure 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.

[0082] Reference Figure 3 , which is a schematic diagram comparing the mixed logarithmic curve and the Gamma 2.2 curve; Figure 4 The figure 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 more display brightness value distribution at low brightness, that is, the hybrid logarithmic curve has more display brightness value binding points and linear interpolation at low brightness, because more display brightness values ​​at low brightness are gamma calibrated and linearly interpolated, which makes the brightness and chromaticity accuracy of low-brightness images higher.

[0083] In some embodiments, step S102: mapping the gamma value corresponding to the display brightness value on the hybrid logarithmic curve to each grayscale under 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 according to the maximum display brightness value of the hybrid logarithmic curve and the highest grayscale corresponding to the maximum display brightness value.

[0084] 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 value and the grayscale of the mixed logarithmic curve in the high brightness mode.

[0085] According to 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.

[0086] 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.

[0087] In some embodiments, reference Figure 5 , is a schematic diagram of a hybrid logarithmic Gamma curve of a display panel in a high brightness mode obtained by step S102 in an embodiment of the present disclosure. 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.

[0088] Table 3

[0089]

[0090] Reference Figure 6 and Figure 7 , Figure 6 This is a comparison chart of the brightness difference between the mixed logarithmic Gamma curve and the Gamma 2.2 curve at the same grayscale. Figure 7This is a comparison chart of the effects of using a hybrid logarithmic Gamma curve and a Gamma 2.2 curve to display the same picture; it can be seen that the hybrid logarithmic Gamma curve has a more obvious brightness difference ΔL than the Gamma2.2 curve when displaying any grayscale picture, that is, the hybrid logarithmic Gamma curve has a higher contrast when displaying any grayscale picture, and thus the hybrid logarithmic Gamma curve performs better in high dynamic range image display. Figure 6 The difference in image quality contrast between the hybrid logarithmic Gamma curve and the Gamma 2.2 curve is shown. The image quality contrast of the hybrid logarithmic Gamma curve is obviously higher than that of the Gamma 2.2 curve. Figure 7 To compare the picture effects of using a hybrid logarithmic gamma curve and a gamma 2.2 curve, the high dynamic image display effect using the hybrid logarithmic gamma curve is significantly better.

[0091] In some embodiments, reference Figure 1 The display panel driving method 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.

[0092] Step S104: determining whether the display panel needs to turn on the high dynamic range image display mode according to the requirements of the usage scenario.

[0093] Among them, this step can be judged and selected manually.

[0094] If yes, then step S105 is executed: calling the mixed logarithmic gamma curve in the high brightness mode in the first memory and writing it into the gamma register in the high brightness mode, thereby realizing the display of the high dynamic range image mode (HDR mode) of the display panel.

[0095] If not, step S106 is executed: calling the Gamma2.2 curve in the high brightness mode in the second memory and writing it into the Gamma register in the high brightness mode, thereby realizing the display of the normal mode (ie, standard dynamic range image mode, SDR mode) of the display panel.

[0096] 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.

[0097] The use of the display panel driving method in the embodiment of the present disclosure is confirmed by adjusting the display brightness bar of the display panel under test, testing 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 fitting a relationship curve between the display brightness value and the actual display brightness, and finally confirming whether the relationship curve is a mixed logarithmic curve.

[0098] Adjust the tested display panel to high dynamic range image (HDR) mode, switch the grayscale from 0 to 255 in sequence, test the actual display brightness corresponding to different grayscales, and then fit the relationship curve between the grayscale from 0 to 255 and the actual display brightness, and finally confirm whether the relationship curve is a mixed logarithmic Gamma curve.

[0099] The display panel driving method provided by the embodiment of the present disclosure sets the corresponding relationship 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, so that the low-brightness and low-grayscale picture can be Gamma-adjusted through more nodes, so that the Gamma value of the low-brightness and low-grayscale picture is more accurate, thereby making the brightness and chromaticity accuracy of the low-brightness and low-grayscale picture higher, effectively improving the image quality performance of the low-brightness and low-grayscale picture, and improving the image quality readability of the low-brightness and low-grayscale picture; 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, so as to obtain the Gamma curve of the display panel in the high-brightness mode, for the picture of the same grayscale, the picture driven by the hybrid logarithmic Gamma curve in this embodiment has a brightness contrast significantly higher than that of the picture driven by the current Gamma 2.2 curve, so that the picture driven by the hybrid logarithmic Gamma curve in this embodiment has a higher contrast and better performance in the high dynamic range image (HDR) display, thereby effectively improving the display effect of the high dynamic range image (HDR), and at the same time, there is no need to increase the redundant Gamma debugging time (Gamma TT).

[0100] In a second aspect, the present disclosure also provides a display terminal, referring to Figure 8 , is a principle block diagram of a display terminal provided in an embodiment of the present disclosure, wherein the display terminal includes: a display panel 1, a setting module 2, configured to set a corresponding relationship curve between a display brightness value of a display brightness bar of the display panel 1 and an actual display brightness to a mixed logarithmic curve; a mapping module 3, configured to map a Gamma value corresponding to a display brightness value on the mixed logarithmic curve to each grayscale in a high brightness mode of the display panel 1, so as to obtain a Gamma curve of the display panel 1 in the high brightness mode; and the Gamma curve in the high brightness mode is a mixed logarithmic Gamma curve.

[0101] In some embodiments, reference Figure 8 The display terminal also includes: a first memory 4, configured to store a Gamma curve in a high brightness mode; a second memory 5, configured to store a Gamma 2.2 curve in a 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 the 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 the high brightness mode in the second memory 5 and write it into the Gamma register of the high brightness mode.

[0102] In some embodiments, reference Figure 8 The display terminal also includes a driving chip 8 configured to store default Gamma register information, and the default Gamma register information is a Gamma 2.2 curve in a high brightness mode.

[0103] The display terminal provided in the embodiment of the present disclosure can adjust the Gamma of a low-brightness and low-grayscale picture through more nodes by setting a setting module, so that the Gamma value of the low-brightness and low-grayscale picture is more accurate, thereby making the brightness and chromaticity accuracy of the low-brightness and low-grayscale picture higher, effectively improving the image quality performance of the low-brightness and low-grayscale picture, and improving the image quality readability of the low-brightness and low-grayscale picture; by setting a mapping module, for a picture of the same grayscale, the brightness contrast of the picture driven by the hybrid logarithmic Gamma curve in the present embodiment is significantly higher than that of the picture driven by the current Gamma 2.2 curve, so that the picture driven by the hybrid logarithmic Gamma curve in the present embodiment has a higher contrast and better performance in the high dynamic range image (HDR) display, thereby effectively improving the display effect of the high dynamic range image (HDR) without increasing the redundant Gamma debugging time (Gamma TT).

[0104] 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.

[0105] 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, a navigator, or the like.

[0106] 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.

[0107] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these 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: 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; 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 1200nit.

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 according to any one of claims 1 to 11 is implemented.

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