Gamma data determination method and apparatus, display panel

Abstract

The application discloses a kind of gamma data determination method and device, display panel.Method includes: obtaining at least two groups of preset gamma data, each group of preset gamma data includes a plurality of bind point brightness under preset display brightness level and its corresponding register value, wherein each bind point brightness corresponds a bind point gray scale;At least two groups of preset gamma data include at least one group of preset gamma data corresponding to first display mode;According to preset rule, at least two groups of preset gamma data and the first target brightness corresponding to at least one first target bind point gray scale in second display mode, calculate the target register value corresponding to the first target brightness in second display mode.Through gamma debugging, a group of preset gamma data in first display mode is obtained, and then the target register value corresponding to the first target brightness in second display mode can be obtained by mathematical calculation method, avoid additional debugging multiple gamma data, improve production line capacity, reduce cost.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a method and apparatus for determining gamma data and a display panel. Background Technology

[0002] With the development of display technology, higher requirements are being placed on display devices such as mobile phones.

[0003] To meet diverse user needs, display devices typically include multiple display modes, each with different maximum brightness requirements. When a display device includes multiple display modes, it necessitates additional gamma data calibration processes, leading to increased pre-shipment calibration time and costs. Summary of the Invention

[0004] This invention provides a method and apparatus for determining gamma data, as well as a display panel, which can meet various brightness requirements without adding too many gamma data debugging processes, thereby improving efficiency and saving costs.

[0005] According to one aspect of the present invention, a method for determining gamma data is provided, comprising:

[0006] Acquire at least two sets of preset gamma data, each set of preset gamma data including multiple bound point brightnesses and their corresponding register values ​​under a preset display brightness level, wherein each bound point brightness corresponds to a bound point grayscale; the at least two sets of preset gamma data include at least one set of preset gamma data corresponding to the first display mode.

[0007] Based on preset rules, at least two sets of preset gamma data, and the first target brightness corresponding to the grayscale of at least one first target binding point in the second display mode, calculate the target register value corresponding to the first target brightness in the second display mode.

[0008] The first display mode and the second display mode are different.

[0009] Optionally, the illuminated area of ​​the screen in the first display mode is larger than the illuminated area of ​​the screen in the second display mode.

[0010] Optionally, the second display mode is either a high dynamic range image mode or a fingerprint unlock mode.

[0011] Optionally, the first display mode is the normal display mode.

[0012] Optionally, acquire at least two sets of preset gamma data, including:

[0013] Obtain at least one set of first preset gamma data corresponding to the first display mode;

[0014] Obtain a set of second preset gamma data corresponding to the first setting mode;

[0015] Based on preset rules, at least two sets of preset gamma data, and the first target brightness corresponding to at least one first target binding point grayscale in the second display mode, calculate the target register value corresponding to the first target brightness in the second display mode, including:

[0016] Based on preset rules, first preset gamma data, second preset gamma data, and at least one first target binding point grayscale corresponding to the first target brightness in the second setting mode, calculate the target register value corresponding to the first target brightness in the second setting mode.

[0017] The first setting mode is either a high dynamic range image mode or a fingerprint unlock mode; the second setting mode is either a high dynamic range image mode or a fingerprint unlock mode.

[0018] Optionally, before obtaining a set of second preset gamma data corresponding to the first setting mode, the following steps are also included:

[0019] Determine the target maximum brightness in the first setting mode and the first target display brightness level in the first display mode;

[0020] Gamma adjustment is performed at the first target display brightness level in the first display mode to obtain a set of gamma data in the first display mode as a set of second preset gamma data corresponding to the first setting mode; the display brightness level in the first display mode corresponding to the first preset gamma data is different from the first target display brightness level in the first display mode.

[0021] Optionally, the maximum target brightness in the second setting mode is less than the maximum target brightness in the first setting mode.

[0022] Optionally, before calculating the target register value corresponding to the first target brightness in the second display mode based on preset rules, at least two sets of preset gamma data, and the first target brightness corresponding to at least one first target binding point grayscale in the second display mode, the method further includes:

[0023] Determine the target maximum brightness in the second display mode and the second target display brightness level in the first display mode;

[0024] Based on preset rules, at least two sets of preset gamma data, and the first target brightness corresponding to at least one first target binding point grayscale in the second display mode, the target register value corresponding to the first target brightness in the second display mode is calculated as follows:

[0025] Based on the first target brightness corresponding to the first target brightness at the first target binding point grayscale in the second display mode, determine the second target brightness corresponding to the first target brightness at the second target display brightness level in the first display mode.

[0026] Based on preset rules, at least two sets of preset gamma data, and the second target brightness, calculate the target register value corresponding to the second target brightness in the first display mode, and use it as the target register value corresponding to the first target brightness in the second display mode.

[0027] Optionally, preset rules include interpolation calculation rules;

[0028] Optionally, the interpolation calculation rule is linear interpolation, and linear interpolation satisfies the following formula:

[0029]

[0030] Among them, X a and Y a These are the register value and brightness value corresponding to the grayscale of the first target binding point in one of the preset gamma data sets; X c and Y c These are the register value and brightness value corresponding to the grayscale of the first target binding point in another set of preset gamma data; Y b For the second target brightness, X b The target register value.

[0031] Optionally, in the preset gamma data corresponding to the first display mode, the register value is less than m. n , where m is the number base and n is the number of bits.

[0032] According to another aspect of the present invention, a gamma data determination apparatus is provided, comprising:

[0033] The preset data acquisition module is used to acquire at least two sets of preset gamma data. Each set of preset gamma data includes multiple bound point brightnesses and their corresponding register values ​​under a preset display brightness level, wherein each bound point brightness corresponds to a bound point grayscale. The at least two sets of preset gamma data include at least one set of preset gamma data corresponding to the first display mode.

[0034] The calculation module is used to calculate the target register value corresponding to the first target brightness in the second display mode based on preset rules, at least two sets of preset gamma data, and the first target brightness corresponding to at least one first target binding point gray level in the second display mode; wherein the first display mode and the second display mode are different.

[0035] According to another aspect of the present invention, a display panel is provided in which gamma data is determined using the above-described gamma data determination method.

[0036] The gamma data determination method provided in this invention includes acquiring at least two sets of preset gamma data. Each set of preset gamma data includes multiple bound point brightnesses and their corresponding register values ​​at a preset display brightness level, wherein each bound point brightness corresponds to a bound point grayscale. The at least two sets of preset gamma data include at least one set of preset gamma data corresponding to a first display mode. Based on preset rules, the at least two sets of preset gamma data, and the first target brightness corresponding to at least one first target bound point grayscale in the second display mode, a target register value corresponding to the first target brightness in the second display mode is calculated. The first display mode and the second display mode are different. The first display mode and the second display mode are two modes used to meet different user needs for display brightness. Based on at least one set of preset gamma data in the first display mode, other preset gamma data, and preset rules, the target register value corresponding to the first target brightness in the second display mode is calculated. The target register value is calculated from at least one set of preset gamma data and other preset gamma data and preset rules in the first display mode. Therefore, after obtaining at least one set of preset gamma data and other preset gamma data in the first display mode, the target register value corresponding to the first target brightness in the second display mode can be obtained through mathematical calculation. There is no need to obtain the gamma data corresponding to the second display mode through gamma debugging, avoiding the need to debug multiple sets of gamma data, thereby reducing the time for gamma debugging and gamma voltage programming, increasing production line capacity, and reducing costs.

[0037] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a flowchart of a gamma data determination method provided in an embodiment of the present invention;

[0040] Figure 2 This is a flowchart of another gamma data determination method provided in an embodiment of the present invention;

[0041] Figure 3 This is a flowchart of another gamma data determination method provided in an embodiment of the present invention;

[0042] Figure 4This is a flowchart of another gamma data determination method provided in an embodiment of the present invention;

[0043] Figure 5 This is a linear interpolation relationship curve provided in an embodiment of the present invention;

[0044] Figure 6 This is a schematic diagram of the structure of a gamma data determination device provided in an embodiment of the present invention. Detailed Implementation

[0045] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0046] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0047] As described in the background section, display devices include various display modes, such as unlock mode and peak brightness mode. In unlock mode, i.e., when unlocking with a fingerprint, the unlocking area requires relatively high brightness, typically at least 800 nits. Too high or too low brightness negatively impacts unlocking. In peak brightness mode, such as High-Dynamic Range (HDR) mode, the maximum brightness must reach at least 1000 nits to achieve good contrast and display quality. Existing display devices are typically tuned at the factory according to a descending order of brightness levels. The range from the highest brightness level to a certain brightness level is usually a data voltage dimming range. At least two sets of gamma data are adjusted within this range to improve the image quality of the display panel. To meet the requirements of both fingerprint unlocking and peak brightness display modes, two additional sets of gamma data need to be tuned at two additional brightness levels. Specifically, one set of gamma data needs to be tuned at the brightness level corresponding to peak brightness to meet the peak brightness requirements when displaying images such as starry skies. Another set of gamma data needs to be tuned at the brightness level required for fingerprint unlocking to meet the brightness requirements during fingerprint unlocking. In addition to the normal debugging process, two extra sets of gamma data debugging were added, which increased the debugging time and cost before delivery.

[0048] To address the aforementioned technical problems, embodiments of the present invention provide a method for determining gamma data. Figure 1 A flowchart of a gamma data determination method provided in an embodiment of the present invention is shown below. Figure 1 The method includes:

[0049] S110: Obtain at least two sets of preset gamma data, each set of preset gamma data including multiple bound point brightnesses and their corresponding register values ​​under a preset display brightness level, wherein each bound point brightness corresponds to a bound point grayscale; the at least two sets of preset gamma data include at least one set of preset gamma data corresponding to the first display mode.

[0050] Specifically, mobile phones, computers, and other display devices typically include brightness adjustment buttons. Users use these buttons to change the input display brightness level, also known as the Display Brightness Value (DBV). Each display brightness level corresponds to the brightness of the highest grayscale level on the display panel. Changing the brightness of the highest grayscale level will change the brightness of the other grayscale levels. Specifically, when the brightness of the highest grayscale level increases, the brightness of the other grayscale levels also increases; conversely, when the brightness of the highest grayscale level decreases, the brightness of the other grayscale levels also decreases. Therefore, each input display brightness level can be understood as corresponding to a brightness level on the display panel. A higher brightness of the highest grayscale level results in a higher brightness level and a higher overall display brightness; conversely, a lower brightness of the highest grayscale level results in a lower brightness level and a lower overall display brightness.

[0051] In this step, at least two sets of preset gamma data are acquired, and each set of preset gamma data includes multiple bound point brightness levels and their corresponding register values ​​at a preset display brightness level. Specifically, at the preset display brightness level, multiple bound point grayscales are set. Taking a maximum grayscale of 255 as an example, the bound point grayscales are set to 16, 32, 128, and 255. Each grayscale corresponds to a bound point brightness and a register value. Therefore, after the bound point grayscales are determined, gamma adjustment can be performed based on the bound point brightness corresponding to the bound point grayscale to obtain the register value corresponding to the bound point brightness, thereby determining the gamma data. After the display brightness level is determined, the bound point brightness corresponding to any bound point grayscale can be determined based on the display brightness corresponding to the maximum grayscale. Specifically, at the preset display brightness level, the bound point brightness corresponding to any bound point grayscale can be calculated using the following formula.

[0052] Lv_Gray=Lv_Gmax*(x n Gmax) γ ,

[0053] Where Lv_Gray represents the bound point brightness corresponding to the bound point grayscale at the preset display brightness level, Lv_Gmax represents the display brightness corresponding to the maximum grayscale at the preset display brightness level, and Gmax represents the maximum grayscale at the preset display brightness level. n This represents the grayscale value of the bound point, where γ is a constant. Specifically, the relationship between display brightness and grayscale usually satisfies the curve relationship of gamma 2.2, so γ can be optionally set to 2.2.

[0054] When acquiring gamma data, two, three, or more sets of preset gamma data can be acquired; this embodiment does not impose a specific limitation. However, at least one set of preset gamma data in the acquired set must be included, specifically, in the first display mode. Since display panels undergo gamma calibration before leaving the factory, and multiple different display brightness levels are typically set for gamma calibration, a set of gamma data is obtained by calibrating the gamma data at a single display brightness level. When the acquired set of preset gamma data includes at least one set of preset gamma data corresponding to the first display mode, the number of gamma data test sets can be reduced. A set can be directly selected from the gamma data calibrated by the display panel, saving efficiency and reducing costs. Each display brightness level in the first display mode can correspond to a set of gamma data. Different display brightness levels correspond to different sets of gamma data. Multiple sets of gamma data corresponding to different display brightness levels can be obtained in advance through gamma calibration and saved to the display device's storage module.

[0055] S120: Based on preset rules, at least two sets of preset gamma data, and the first target brightness corresponding to at least one first target binding point grayscale in the second display mode, calculate the target register value corresponding to the first target brightness in the second display mode.

[0056] The first display mode and the second display mode are different.

[0057] For example, the first target grayscale can be the maximum grayscale in the second display mode, such as 255 grayscale. Then the first target brightness is the brightness corresponding to 255 grayscale. The first target brightness can be set according to user needs. For example, when the second display mode is fingerprint unlock mode, the first target brightness can be 800 nits.

[0058] There is a preset correspondence, or preset rule, between at least two sets of preset gamma data and the required gamma data. Based on the preset rule, the target register value corresponding to the first target brightness in the second display mode can be calculated. This preset rule can be set in advance, and the required gamma data includes the target register value corresponding to the first target brightness corresponding to the first target grayscale in the second display mode.

[0059] Optionally, the illuminated area in the first display mode is larger than the illuminated area in the second display mode. In the second display mode, only a portion of the display area may be illuminated. For example, the illuminated area in the second display mode may be less than 20% of the total display area, such as 1% or 10% of the total display area. The second display mode illuminates only a small area, different from the first, thus meeting the needs of the display device for various display scenarios. Optionally, the first display mode can be a normal display mode, i.e., the mode corresponding to the normal display of a mobile phone or computer. The illuminated area in the normal display mode can be greater than or equal to 50% of the total display area. Optionally, the second display mode can be an HDR mode or a fingerprint unlock mode. For example, when the second display mode is HDR mode, the first target brightness can be set to 1000 nits to improve the display panel's display effect. When the second display mode is fingerprint unlock mode, the first target brightness can be set to 800 nits.

[0060] In this embodiment, the first display mode and the second display mode are two modes designed to meet different user needs for display brightness. Based on at least one set of preset gamma data and other preset gamma data and preset rules in the first display mode, the target register value corresponding to the first target brightness in the second display mode is calculated. The target register value is calculated using at least one set of preset gamma data and other preset gamma data and preset rules in the first display mode. Therefore, after obtaining at least one set of preset gamma data and other preset gamma data in the first display mode, the target register value corresponding to the first target brightness in the second display mode can be obtained through mathematical calculation. This eliminates the need for gamma debugging to obtain the gamma data corresponding to the second display mode, avoiding the need for additional debugging of multiple sets of gamma data. Consequently, it reduces the time required for gamma debugging and gamma voltage programming, increases production line capacity, and reduces costs.

[0061] Figure 2 A flowchart of another gamma data determination method provided in an embodiment of the present invention is shown below. Figure 2 Optionally, the method includes:

[0062] S210: Obtain at least one set of first preset gamma data corresponding to the first display mode.

[0063] The first display mode is the normal display mode. Before leaving the factory, the display panel undergoes multiple gamma calibration processes at different brightness levels in the first display mode to obtain multiple sets of gamma data. Taking a certain brightness level as an example, at that brightness level, multiple bound grayscales are set, and the data voltage is continuously adjusted while acquiring the display brightness until the acquired brightness reaches the bound brightness corresponding to the bound grayscale. Each bound brightness corresponds to a register value, and each bound brightness also corresponds to a bound grayscale. Multiple bound brightnesses and their corresponding register values ​​at the same brightness level constitute a set of gamma data. At least one set of gamma data acquired in the first display mode is selected as the first preset gamma data. For example, in the first display mode, the gamma data at the brightness level with a maximum grayscale corresponding to a brightness of 600 nits is selected as the first preset gamma data.

[0064] S220: Obtain a set of second preset gamma data corresponding to the first setting mode.

[0065] The first setting mode can be either a high dynamic range image mode or a fingerprint unlock mode. A set of gamma data corresponding to the high dynamic range image mode is acquired as the second preset gamma data, or a set of gamma data corresponding to the fingerprint unlock mode is acquired as the second preset gamma data. The specific acquisition process involves gamma adjustment based on multiple bound point grayscale and bound point brightness in the display device, which will not be elaborated here.

[0066] Optionally, before step S220, the method further includes:

[0067] The target maximum brightness in the first setting mode is determined to be the first target display brightness level in the first display mode; gamma adjustment is performed at the first target display brightness level in the first display mode to obtain a set of gamma data in the first display mode as a set of second preset gamma data corresponding to the first setting mode; the display brightness level in the first display mode corresponding to the first preset gamma data is different from the first target display brightness level in the first display mode.

[0068] Specifically, the target maximum brightness in the first setting mode can be the target display brightness corresponding to the maximum grayscale level in the first setting mode. Taking the high dynamic range image mode as an example, the target maximum brightness can be 1000 nits. However, the brightness corresponding to the maximum grayscale level of the display panel in the first display mode is less than 1000 nits. For example, when the brightness corresponding to the maximum grayscale level is 900 nits, under the premise that the data voltage remains unchanged (each data voltage corresponds to a register value, so when the data voltage remains unchanged, the register value remains unchanged), when switching from the first display mode to the first setting mode, since the first setting mode is a small area illumination mode, the current of most pixels in the display panel is zero, the load is reduced, so when the small area is illuminated, the display brightness can reach 1000 nits. Thus, the first target display brightness level can be determined, that is, the display brightness corresponding to the maximum grayscale level of the first target display brightness level in the first display mode is 900 nits. The target maximum brightness in the first setting mode has a preset correspondence with the first target display brightness level in the first display mode. This preset correspondence can be obtained through multiple tests. Each test process includes controlling the display panel to display at the maximum grayscale corresponding to a certain display brightness level in the first display mode, obtaining the display brightness in the first display mode, then keeping the data voltage (register value) unchanged, switching the display device from the first display mode to the first setting mode, obtaining the display brightness of the display device in the first setting mode, and thus obtaining the maximum display brightness of a certain display brightness level in the first display mode as the display brightness in the first setting mode. Based on the above multiple test processes, the correspondence between the target maximum brightness in the first setting mode and the first target display brightness level in the first display mode can be obtained.

[0069] For example, in the first setting mode, the target maximum brightness is 1000 nits. According to the above correspondence, 1000 nits in the first setting mode corresponds to a brightness of 900 nits in the first display mode. That is, the first target display brightness level is the display brightness level of 900 nits corresponding to the maximum grayscale in the first display mode. In the first display mode, gamma adjustment is performed at the first target display brightness level to obtain the second preset gamma data.

[0070] S230: Calculate the target register value corresponding to the first target brightness in the second setting mode based on the preset rules, the first preset gamma data, the second preset gamma data, and the first target brightness corresponding to at least one first target binding point grayscale in the second setting mode.

[0071] The first setting mode is either a high dynamic range (HDR) image mode or a fingerprint unlock mode; the second setting mode is the other of the same. That is, if the first setting mode is HDR image mode, then the second setting mode is fingerprint unlock mode, or vice versa. After acquiring the first and second preset gamma data, the target register value corresponding to the first target brightness in the second setting mode can be calculated according to preset rules.

[0072] Optionally, the target maximum brightness in the second setting mode is lower than that in the first setting mode. The target maximum brightness can be the brightness corresponding to the maximum grayscale level in the corresponding setting mode. The different target maximum brightness in the two modes can meet the user's needs for multiple display modes. For example, the first setting mode can be a high range dynamic range (HDR) mode, and the second setting mode can be a fingerprint unlock mode. The brightness corresponding to the maximum grayscale level in HDR mode is greater than that in fingerprint unlock mode. The higher target maximum brightness in HDR mode results in higher contrast and richer brightness performance. For instance, when the display panel shows a starry sky, with stars and the moon in addition to a black sky, a target maximum brightness of 1000 nits will provide a better display effect for the stars and moon than 800 nits. In fingerprint unlock mode, a maximum brightness of 800 nits in the unlock area is sufficient for unlocking; too high or too low brightness will negatively impact unlocking. Users can enter the corresponding mode according to their needs, and the display panel will show the corresponding target maximum brightness to meet the user's needs in different modes. Meanwhile, the first setting mode is a high-range dynamic image mode with a higher maximum brightness. Because the high-range dynamic image mode requires high accuracy in display brightness, the gamma data in the first setting mode is obtained through gamma tuning, which ensures high accuracy and good display effect in the high-range dynamic image mode. In the second setting mode, the register values ​​corresponding to each first target brightness in the gamma data are calculated mathematically. The accuracy is lower than that obtained through gamma tuning, but since the accuracy requirement for brightness is lower in fingerprint unlocking than in the high-range dynamic image mode, it does not affect the fingerprint unlocking result.

[0073] Figure 3 A flowchart of another gamma data determination method provided in an embodiment of the present invention is shown below. Figure 3 Optionally, the method includes:

[0074] S310: Obtain at least two sets of preset gamma data, each set of preset gamma data including multiple bound point brightnesses and their corresponding register values ​​under a preset display brightness level, wherein each bound point brightness corresponds to a bound point grayscale; the at least two sets of preset gamma data include at least one set of preset gamma data corresponding to the first display mode.

[0075] S320: Determine the target maximum brightness level in the second display mode as the second target display brightness level in the first display mode.

[0076] Specifically, the target maximum brightness in the second display mode can be the display brightness corresponding to the maximum grayscale, for example, 800 nits. When the data voltage remains constant, the display brightness changes when the display device switches from the first display mode to the second display mode. Therefore, it is necessary to determine the target maximum brightness in the second display mode to the second target display brightness level in the first display mode. Based on the pre-obtained correspondence between the display brightness in the second display mode and the display brightness level in the first display mode, the second target display brightness level can be determined. For example, if the target maximum brightness in the second display mode is 800 nits, the corresponding target brightness corresponding to the maximum grayscale of the second target display brightness level in the first display mode is 700 nits.

[0077] S330: Based on the first target brightness corresponding to the first target brightness of the first target binding point grayscale in the second display mode, determine the second target brightness level corresponding to the second target brightness of the first target binding point grayscale in the first display mode.

[0078] In the second display mode, there are multiple first target bound point gray levels, such as 16 gray levels, 32 gray levels, 64 gray levels, 128 gray levels, and 255 gray levels. Each first target bound point gray level corresponds to a first target brightness in the second display mode. After determining the second target display brightness level corresponding to the maximum target brightness in the first display mode, the second target brightness corresponding to each first target bound point gray level in the first display mode at the second target display brightness level can be determined. In other words, after determining the second target display brightness level, the second target brightness corresponding to each first target bound point gray level in the first display mode at the second target display brightness level can be obtained.

[0079] S340: Based on preset rules, at least two sets of preset gamma data and the second target brightness, calculate the target register value corresponding to the second target brightness in the first display mode, and use it as the target register value corresponding to the first target brightness in the second display mode.

[0080] Optionally, the preset rules include interpolation calculation rules, which can be linear interpolation or nonlinear interpolation. This embodiment does not specifically limit this.

[0081] Optionally, the interpolation calculation rule is linear interpolation, and linear interpolation satisfies the following formula:

[0082]

[0083] Among them, X a and Y a These are the register value and brightness value corresponding to the grayscale of the first target binding point in one of the preset gamma data sets; X c and Y c These are the register value and brightness value corresponding to the grayscale of the first target binding point in another set of preset gamma data; Y b For the second target brightness, X b This is the target register value. The default rule can be linear interpolation. Y b The size can be between Y a and Y c Between. X b The size can be between X a and X c between.

[0084] The first target grayscale can be the maximum grayscale, for example, grayscale 255, X a and Y a These are the register values ​​and luminance values ​​corresponding to 255 gray levels in a set of preset gamma data, respectively. c and Y c These are the register values ​​and luminance values ​​corresponding to grayscale level 255 in another set of preset gamma data; the second target luminance is determined according to user requirements. Therefore, once the above parameter values ​​are determined, the target register value can be calculated using the above formula. The interpolation calculation rule is linear interpolation, which is simple to calculate and improves computational efficiency.

[0085] Figure 4 A flowchart of another gamma data determination method provided in an embodiment of the present invention is shown below. Figure 4 Optionally, the method includes:

[0086] S410: Obtain at least one set of first preset gamma data corresponding to the first display mode.

[0087] S420: Obtain a set of second preset gamma data corresponding to the first setting mode.

[0088] S430: Determine the target maximum brightness in the second display mode and the second target display brightness level in the first display mode.

[0089] S440: Based on the first target brightness corresponding to the first target brightness of the first target binding point grayscale in the second display mode, determine the second target brightness level corresponding to the second target brightness of the first target binding point grayscale in the first display mode.

[0090] S450: Based on the preset rules, the first preset gamma data, the second preset gamma data, and the second target brightness, calculate the target register value corresponding to the second target brightness in the first display mode, and use it as the target register value corresponding to the first target brightness in the second setting mode.

[0091] Specifically, each set of preset gamma data has multiple grayscale levels at the preset display brightness level, namely 16 grayscale, 32 grayscale, 64 grayscale, 128 grayscale, and 255 grayscale. Optionally, the preset rule is an interpolation calculation rule. Taking 16 grayscale as an example, and exemplarily illustrating the acquisition of two sets of preset gamma data, based on the display brightness of the two sets of preset gamma data at 16 grayscale and their corresponding register values, and the second target brightness corresponding to 16 grayscale in the first display mode under the second setting mode, the target register value corresponding to 16 grayscale in the second setting mode is calculated by interpolation. The calculation process for the target register value under other grayscale levels is the same and will not be repeated here. Taking the second setting mode as a fingerprint unlock mode as an example, the fingerprint unlock area is a circular aperture, and the fingerprint unlock pattern is inside the circular aperture. After entering the fingerprint unlock mode, although the display device only displays the unlock pattern with the display brightness corresponding to the maximum grayscale, when displaying the circular aperture in the unlock area, display brightness at multiple grayscale levels is required to construct the circular aperture. A circular aperture can be composed of multiple rings, with the gray levels corresponding to the rings gradually increasing from the outermost to the innermost rings, which means the brightness gradually increases, in order to ensure the smoothness of the aperture.

[0092] Optionally, the interpolation calculation rule is linear interpolation, and linear interpolation satisfies the following formula:

[0093]

[0094] Among them, X a Y is the register value corresponding to the second preset gamma data in the grayscale of the first target binding point. a X represents the brightness of the first target binding point corresponding to the grayscale of the second preset gamma data. c Y is the register value corresponding to the first preset gamma data at the first target binding point grayscale. c Y represents the brightness of the first target binding point corresponding to the grayscale of the first preset gamma data. b For the second target brightness, X b The target register value is the grayscale of the first target binding point, which can be any binding point grayscale.

[0095] Figure 5 A linear interpolation relationship curve is provided for an embodiment of the present invention, with reference to... Figure 5 , Figure 5 The horizontal axis represents the register value, and the vertical axis represents the display brightness, both in nits. Figure 5The dataset includes multiple sets of data. Among these sets, one set contains a second preset gamma dataset where the gamma data corresponding to a specific grayscale level (e.g., grayscale level 255) is designated as Gamma1. The x-coordinate of Gamma1, the gamma data corresponding to a specific grayscale level in the second preset gamma dataset, is X. a The vertical axis is Y a The other sets of data include a set of gamma data corresponding to the same gray level (e.g., gray level 255) of the first preset gamma data, with the x-axis being X. c The vertical axis is Y c It also includes a set of target data Gamma3 corresponding to the same grayscale of the binding point in the second display mode, with the horizontal axis being X. b The vertical axis is Y b In this embodiment, X is exemplarily shown. a Y is 4000. a For 900 nits, X c For 3000, Y c For 600 nits, Y b The value is 700 nits. X can be calculated using the formula above. b It is 3333.

[0096] Optionally, in the preset gamma data corresponding to the first display mode, the register value is less than m. n , where m is the number base and n is the number of bits.

[0097] For example, m is 2 and n is 12, meaning that in the preset gamma data corresponding to the first display mode, the register value is less than 4096. This setting ensures that when calculating the target register value corresponding to the first target brightness in the second display mode based on preset rules, at least two sets of preset gamma data, and the first target brightness corresponding to the first target binding point grayscale in the second display mode, the target register value is unlikely to exceed the maximum range of register values, thus guaranteeing that the target register value can be obtained.

[0098] This invention also provides a gamma data determination apparatus. The gamma data determination apparatus can be used to execute the gamma data determination method provided in this invention. Figure 6 This is a schematic diagram of a gamma data determination device provided in an embodiment of the present invention, with reference to... Figure 6 The device includes:

[0099] The preset data acquisition module 10 is used to acquire at least two sets of preset gamma data. Each set of preset gamma data includes multiple bound point brightnesses and their corresponding register values ​​under a preset display brightness level, wherein each bound point brightness corresponds to a bound point grayscale. The at least two sets of preset gamma data include at least one set of preset gamma data corresponding to the first display mode.

[0100] The calculation module 20 is used to calculate the target register value corresponding to the first target brightness in the second display mode based on preset rules, at least two sets of preset gamma data, and the first target brightness corresponding to at least one first target binding point gray level in the second display mode; wherein the first display mode and the second display mode are different.

[0101] The beneficial effects of the gamma data determination device are the same as those of the gamma data determination method, and will not be repeated here.

[0102] Optionally, the preset data acquisition module includes:

[0103] The first data acquisition unit is used to acquire at least one set of first preset gamma data corresponding to the first display mode;

[0104] The second data acquisition unit is used to acquire a set of second preset gamma data corresponding to the first setting mode.

[0105] The calculation module includes:

[0106] The calculation unit is used to calculate the target register value corresponding to the first target brightness in the second setting mode based on the preset rules, the first preset gamma data, the second preset gamma data, and the first target brightness corresponding to the gray level of at least one first target binding point in the second setting mode.

[0107] The first setting mode is either a high dynamic range image mode or a fingerprint unlock mode; the second setting mode is either a high dynamic range image mode or a fingerprint unlock mode.

[0108] Optionally, the gamma data determination device also includes:

[0109] The first target display brightness level determination module is used to determine the maximum target brightness in the first setting mode and the first target display brightness level in the first display mode.

[0110] The second preset gamma data determination module is used to perform gamma adjustment under the first target display brightness level in the first display mode, and obtain a set of gamma data in the first display mode as a set of second preset gamma data corresponding to the first setting mode; the display brightness level in the first display mode corresponding to the first preset gamma data is different from the first target display brightness level in the first display mode.

[0111] This invention also provides another gamma data determination device, optionally comprising:

[0112] The preset data acquisition module is used to acquire at least two sets of preset gamma data. Each set of preset gamma data includes multiple bound point brightnesses and their corresponding register values ​​under a preset display brightness level, wherein each bound point brightness corresponds to a bound point grayscale. The at least two sets of preset gamma data include at least one set of preset gamma data corresponding to the first display mode.

[0113] The second target display brightness level determination module is used to determine the maximum brightness of the target in the second display mode as the second target display brightness level in the first display mode; the second target brightness determination module is used to determine the second target brightness corresponding to the grayscale of the first target binding point in the first display mode based on the first target brightness corresponding to the grayscale of the first target binding point in the second display mode.

[0114] The target register value calculation module is used to calculate the target register value corresponding to the second target brightness in the first display mode according to preset rules, at least two sets of preset gamma data and the second target brightness, and use it as the target register value corresponding to the first target brightness in the second display mode.

[0115] This invention also provides a display panel that uses the above-described gamma data determination method to determine gamma data. The beneficial effects of the display panel are the same as those of the gamma data determination method, and will not be repeated here.

[0116] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0117] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for determining gamma data, characterized in that, include: At least two sets of preset gamma data are acquired. Each set of preset gamma data includes multiple bound point brightnesses and their corresponding register values ​​at a preset display brightness level, wherein each bound point brightness corresponds to a bound point grayscale. The at least two sets of preset gamma data include at least one set of preset gamma data corresponding to the first display mode. Based on preset rules, at least two sets of preset gamma data, and the first target brightness corresponding to at least one first target binding point grayscale in the second display mode, calculate the target register value corresponding to the first target brightness in the second display mode. The first display mode and the second display mode are different; Before calculating the target register value corresponding to the first target brightness in the second display mode based on preset rules, at least two sets of preset gamma data, and the first target brightness corresponding to at least one first target binding point grayscale in the second display mode, the method further includes: Determine the target maximum brightness level in the second display mode as the second target display brightness level in the first display mode; The step of calculating the target register value corresponding to the first target brightness in the second display mode based on preset rules, at least two sets of preset gamma data, and the first target brightness corresponding to at least one first target binding point grayscale in the second display mode includes: Based on the first target brightness corresponding to the first target brightness at the first target binding point grayscale in the second display mode, determine the second target brightness corresponding to the first target brightness at the second target display brightness level in the first display mode; Based on preset rules, at least two sets of preset gamma data, and the second target brightness, calculate the target register value corresponding to the second target brightness in the first display mode, and use it as the target register value corresponding to the first target brightness in the second display mode. The preset rules include interpolation calculation rules.

2. The gamma data determination method according to claim 1, characterized in that, The illuminated area of ​​the screen in the first display mode is greater than that in the second display mode.

3. The gamma data determination method according to claim 1, characterized in that, The second display mode is either a high dynamic range image mode or a fingerprint unlock mode.

4. The gamma data determination method according to claim 1, characterized in that, The first display mode is the normal display mode.

5. The gamma data determination method according to claim 3, characterized in that, The acquisition of at least two sets of preset gamma data includes: Acquire at least one set of first preset gamma data corresponding to the first display mode; Obtain a set of second preset gamma data corresponding to the first setting mode; The step of calculating the target register value corresponding to the first target brightness in the second display mode based on preset rules, at least two sets of preset gamma data, and the first target brightness corresponding to at least one first target binding point grayscale in the second display mode includes: Based on the preset rules, the first preset gamma data, the second preset gamma data, and the first target brightness corresponding to at least one first target binding point grayscale in the second setting mode, calculate the target register value corresponding to the first target brightness in the second setting mode. The first setting mode is one of the high dynamic range image mode and the fingerprint unlock mode; the second setting mode is another of the high dynamic range image mode and the fingerprint unlock mode.

6. The gamma data determination method according to claim 5, characterized in that, Before obtaining a set of second preset gamma data corresponding to the first preset mode, the method further includes: Determine the target maximum brightness level in the first setting mode and the first target display brightness level in the first display mode; Gamma adjustment is performed at the first target display brightness level in the first display mode to obtain a set of gamma data in the first display mode as a set of second preset gamma data corresponding to the first setting mode; the display brightness level in the first display mode corresponding to the first preset gamma data is different from the first target display brightness level in the first display mode.

7. The gamma data determination method according to claim 6, characterized in that, The maximum target brightness in the second setting mode is less than the maximum target brightness in the first setting mode.

8. The gamma data determination method according to claim 1, characterized in that, The interpolation calculation rule is linear interpolation, and the linear interpolation satisfies the following formula: Among them, X a and Y a These are, respectively, the register value and luminance value corresponding to the grayscale of the first target binding point in one set of preset gamma data; X c and Y c These are, respectively, the register value and brightness value corresponding to the grayscale of the first target binding point in another set of preset gamma data; Y b X represents the second target brightness. b The target register value.

9. The gamma data determination method according to claim 1, characterized in that, In the preset gamma data corresponding to the first display mode, the register value is less than m. n , where m is the number base and n is the number of bits.

10. A gamma data determination device, characterized in that, include: The preset data acquisition module is used to acquire at least two sets of preset gamma data. Each set of preset gamma data includes multiple bound point brightnesses and their corresponding register values ​​under a preset display brightness level, wherein each bound point brightness corresponds to a bound point grayscale. The at least two sets of preset gamma data include at least one set of preset gamma data corresponding to the first display mode. The second target display brightness level determination module is used to determine the second target display brightness level in the first display mode at the maximum brightness of the target in the second display mode. The second target brightness determination module is used to determine the second target brightness corresponding to the first target binding point grayscale of the second target display brightness level in the first display mode, based on the first target brightness corresponding to the first target binding point grayscale in the second display mode. The target register value calculation module is used to calculate the target register value corresponding to the second target brightness in the first display mode according to preset rules, at least two sets of preset gamma data and the second target brightness, and use it as the target register value corresponding to the first target brightness in the second display mode; the preset rules include interpolation calculation rules. The first display mode and the second display mode are different.

11. A display panel, characterized in that, The gamma data is determined using the gamma data determination method described in any one of claims 1-9.

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