CN113903299B - Display brightness regulation and control method, device, equipment, storage medium and display screen - Google Patents
Display brightness regulation and control method, device, equipment, storage medium and display screen Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
- G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
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Abstract
The application provides a display brightness regulation and control method, a device, equipment, a storage medium and a display screen, wherein the method comprises the following steps: receiving a brightness adjustment instruction for a display screen, wherein the brightness adjustment instruction comprises target brightness; determining a target dimming interval in which the target brightness is located and a previous dimming interval adjacent to the target dimming interval, wherein the display screen comprises a plurality of dimming intervals, and the first node brightness of the previous dimming interval is smaller than the second node brightness of the target dimming interval; determining a target data scaling ratio of the display screen reaching the target brightness according to the first node brightness and the scaling ratio of the first node; and displaying the target image on the display screen according to the target data scaling ratio. The method and the device realize the elimination of the instant jump brought by the DS dimming interval, and further avoid the flicker of dimming.
Description
Technical Field
The application relates to the technical field of display, in particular to a display brightness adjusting and controlling method, device, equipment, storage medium and display screen.
Background
The OLED display screen has the advantages of power saving, high resolution, long service life of a panel and the like, and is widely applied to various fields, such as mobile phones, commercial PCs, household PCs and notebook computers; in practical use of the OLED display terminal, due to different requirements of each user, the brightness of the screen needs to be adjusted, that is, dimming is performed, so that the brightness of the screen better meets the requirements of the user.
Currently, common dimming methods include gamma (gamma) dimming, pulse signal dimming (PWM), data Scaling (DS) dimming, and hybrid dimming using the above dimming methods in combination. When DS and the other two dimming modes are matched, a group of gamma arrays is sacrificed for each DS dimming. Thus, the available gamma array in the gamma dimming interval is reduced, and the gamma dimming effect is affected. In addition, instant jump exists between adjacent DS dimming intervals, and when the LED dimming panel is actually applied to a panel, the brightness is easy to flicker.
Disclosure of Invention
An object of the embodiment of the application is to provide a display brightness adjusting and controlling method, device, equipment, storage medium and display screen, which are used for eliminating instant jump brought by a DS dimming interval and further avoiding flickering of dimming.
An embodiment of the present application provides a method for adjusting and controlling display brightness, including: receiving a brightness adjustment instruction for a display screen, wherein the brightness adjustment instruction comprises target brightness; determining a target dimming interval in which the target brightness is located and a previous dimming interval adjacent to the target dimming interval, wherein the display screen comprises a plurality of dimming intervals, and the first node brightness of the previous dimming interval is smaller than the second node brightness of the target dimming interval; determining a target data scaling ratio of the display screen reaching the target brightness according to the first node brightness and the scaling ratio of the first node; and displaying the target image on the display screen according to the target data scaling ratio.
In an embodiment, before the determining the target dimming interval in which the target brightness is located and the previous dimming interval adjacent to the target dimming interval, the method further includes: judging whether the target brightness is in a preset dimming interval of data scaling dimming or not; and when the target brightness is in the preset dimming interval of the data scaling dimming, determining a target dimming interval in which the target brightness is and a previous dimming interval adjacent to the target dimming interval.
In one embodiment, before the determining the target dimming interval in which the target brightness is located and the previous dimming interval adjacent to the target dimming interval, the method further includes: and mapping the target brightness to a preset reference curve to obtain the target brightness after mapping processing.
In an embodiment, the determining, according to the first node brightness and the scaling ratio of the first node, the target data scaling ratio of the display screen to reach the target brightness includes: when the target brightness is in the preset dimming interval of the data scaling dimming, calculating to obtain an initial scaling ratio according to the first node brightness and the scaling ratio of the first node; and determining a target data scaling ratio of the display screen reaching the target brightness according to the initial scaling ratio and the maximum brightness value of the display screen.
In one embodiment, the method further comprises: when the target brightness is within the preset dimming interval of the data scaling dimming, the initial scaling ratio is calculated by adopting the following formula:
the main_DBV is the target brightness, and the target dimming interval is the ith dimming interval of the display screen; DS_ratio_t [ i ] is the initial scaling ratio of the ith dimming interval under the limitation of the target brightness main_DBV, the previous dimming interval is the (i-1) TH dimming interval, main_DSL_TH (i-1) is the first node brightness of the (i-1) TH dimming interval, and Y [ i-1] is the scaling ratio of the first node of the (i-1) TH dimming interval, wherein i is an integer greater than or equal to 0.
In one embodiment, the method further comprises: when the target brightness is not in the preset dimming interval of the data scaling dimming, the initial scaling ratio is calculated by adopting the following formula:
DS_ratio_t[i]＝Y[i]
wherein DS_ratio_t [ i ] is the initial scaling ratio of the ith dimming interval, Y [ i ] is the preset node scaling ratio of the ith dimming interval, wherein i is an integer greater than or equal to 0.
A second aspect of the embodiments of the present application provides a display brightness adjusting device, including: the receiving module is used for receiving a brightness adjusting instruction for the display screen, wherein the brightness adjusting instruction comprises target brightness; the display screen comprises a plurality of dimming intervals, wherein the first node brightness of the previous dimming interval is smaller than the second node brightness of the target dimming interval; the second determining module is used for determining a target data scaling ratio of the display screen reaching the target brightness according to the first node brightness and the scaling ratio of the first node; and the display module is used for displaying the target image on the display screen according to the target data scaling ratio.
In one embodiment, the method further comprises: the judging module is used for judging whether the target brightness is in a preset dimming interval of data zoom dimming before the target dimming interval where the target brightness is determined and a previous dimming interval adjacent to the target dimming interval; the second determining module is further configured to: and when the target brightness is in the preset dimming interval of the data scaling dimming, determining a target dimming interval in which the target brightness is and a previous dimming interval adjacent to the target dimming interval.
In one embodiment, the method further comprises: the mapping module is used for mapping the target brightness to a preset reference curve before the target dimming interval where the target brightness is determined and the previous dimming interval adjacent to the target dimming interval, so as to obtain the target brightness after mapping processing.
In an embodiment, the second determining module is configured to: when the target brightness is in the preset dimming interval of the data scaling dimming, calculating to obtain an initial scaling ratio according to the first node brightness and the scaling ratio of the first node; and determining a target data scaling ratio of the display screen reaching the target brightness according to the initial scaling ratio and the maximum brightness value of the display screen.
In one embodiment, the method further comprises: when the target brightness is within the preset dimming interval of the data scaling dimming, the initial scaling ratio is calculated by adopting the following formula:
the main_DBV is the target brightness, and the target dimming interval is the ith dimming interval of the display screen; DS_ratio_t [ i ] is the initial scaling ratio of the ith dimming interval under the limitation of the target brightness main_DBV, the previous dimming interval is the (i-1) TH dimming interval, main_DSL_TH (i-1) is the first node brightness of the (i-1) TH dimming interval, and Y [ i-1] is the scaling ratio of the first node of the (i-1) TH dimming interval, wherein i is an integer greater than or equal to 0.
In one embodiment, the method further comprises: when the target brightness is not in the preset dimming interval of the data scaling dimming, the initial scaling ratio is calculated by adopting the following formula:
DS_ratio_t[i]＝Y[i]
wherein DS_ratio_t [ i ] is the initial scaling ratio of the ith dimming interval, Y [ i ] is the preset node scaling ratio of the ith dimming interval, wherein i is an integer greater than or equal to 0.
A third aspect of the embodiments of the present application provides an electronic device, including: a memory for storing a computer program; a processor for executing the computer program to implement the method of the first aspect of the embodiments of the present application and any one of the embodiments thereof.
A fourth aspect of the present application provides a non-transitory electronic device readable storage medium, comprising: a program which, when run by an electronic device, causes the electronic device to perform the method of the first aspect of the embodiments of the present application and any of the embodiments thereof.
A fifth aspect of the embodiments of the present application provides a display screen, including: the display panel of the display screen includes: an OLED panel, a small-space display screen, a mini LED panel or a micro LED panel.
According to the display brightness regulation and control method, device, equipment, storage medium and display screen, when a brightness regulation instruction of the display screen is received, a target dimming interval in which the target brightness is located and a previous dimming interval adjacent to the target dimming interval are determined, wherein the first node brightness of the previous dimming interval is smaller than the second node brightness of the target dimming interval; then, determining a target data scaling ratio of the display screen reaching the target brightness according to the first node brightness and the scaling ratio of the first node; and finally, displaying the target image on the display screen according to the target data scaling ratio. Therefore, the brightness of the target dimming interval is adjusted to be related to the node brightness of the previous dimming interval, and the actual dimming result is transited from the node brightness of the previous dimming interval to the target brightness, so that instant jump is avoided when dimming is carried out between two adjacent dimming intervals, and screen flicker caused by the dimming process is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 2A is a schematic diagram of an application scenario of display brightness control according to an embodiment of the present application;
fig. 2B is a schematic diagram of an application scenario of display brightness control according to an embodiment of the present application;
FIG. 3 is a flow chart of a method for controlling brightness according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram illustrating a dimming interval division according to an embodiment of the present disclosure;
FIG. 5 is a flow chart of a method for controlling brightness according to an embodiment of the present disclosure;
FIGS. 6A-6H are schematic diagrams illustrating a dimming process and a dimming result according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a display brightness adjusting device according to an embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. In the description of the present application, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, the present embodiment provides an electronic apparatus 1 including: at least one processor 11 and a memory 12, one processor being exemplified in fig. 1. The processor 11 and the memory 12 are connected through the bus 10, and the memory 12 stores instructions executable by the processor 11, so that the electronic device 1 can execute all or part of the methods in the embodiments described below, so as to realize automatic regulation and control of the brightness of the display screen.
In an embodiment, the electronic device 1 may be a mobile phone, a notebook computer, or the like.
The present embodiment provides a display screen, which may be a display screen of the electronic device 1, and the display screen may include: the display panel of the display unit may be one of an LED panel, a small-pitch display screen, a mini LED panel, or a micro LED panel.
In an embodiment, the display screen may be an OLED display screen, the OLED display screen is a current-driven component, each sub-pixel in the OLED panel includes an OLED light-emitting device, when a current flows through the OLED light-emitting device in the sub-pixel, the OLED is turned on, and the sub-pixel corresponding to the OLED presents a corresponding color on the screen. When current flows through the OLED light emitting devices in all sub-pixels, all OLEDs are lit and the OLED panel reaches maximum brightness at the present voltage. When no current flows through any one of the OLEDs, all of the OLEDs are in an off state, and the brightness of the OLED panel is 0.
In the actual use process of the OLED display screen, external ambient light gradually goes through the process of changing brightness, such as changing from dark to bright, changing from bright to dark to bright, etc. In the process of changing the light of the external environment, if the brightness of the screen is not automatically adjusted, in order to view the display picture of the screen more clearly and more comfortably, the user can manually adjust the brightness of the screen or automatically adjust the brightness of the screen. However, if the user considers that the brightness of the terminal screen does not conform to the use habit of the user after the brightness of the terminal screen is automatically adjusted according to the brightness of the ambient light, the user can also manually adjust the brightness of the terminal screen. It can be seen that the display screen often encounters a scene of dimming during use.
Currently, when a terminal performs brightness adjustment, a data scaling dimming interval (DS dimming interval) is generally used from the highest display brightness level to a certain display brightness level according to the order from high to low, and each DS dimming operation in one data scaling dimming interval needs to sacrifice a group of gamma arrays, and in addition, an instant jump exists between adjacent DS dimming intervals, so that when the panel is actually applied, the brightness is easy to flicker.
As shown in fig. 2A, the schematic diagram of DS dimming in the embodiment of the present application is shown with the horizontal axis being the display brightness level BDV value, the vertical axis being the data scaling ratio ds_ratio corresponding to DS dimming, assuming that the OLED panel is a 13bit display screen, the maximum brightness Max thereof is 8192, assuming that the display brightness level BDV (Display BrightnessValue, abbreviated as "DBV") of the OLED panel is divided into six dimming sections, respectively, being the dimming sections Area1 to Area6, and the node brightness levels corresponding to each dimming section are respectively ds_th0 to ds_th6. As shown in fig. 2A, when DS dimming is turned on (DS on), there is a momentary jump between two adjacent DS dimming intervals. This jump occurs not only in adjacent two DS dimming intervals, but also when the DS dimming scheme is mixed with other dimming schemes.
As shown in fig. 2B, when three dimming modes of PWM, DS and gamma are mixed, a jump still occurs at the junction of the DS dimming interval and other dimming intervals, and the two DS dimming intervals in fig. 2B sacrifice the two gamma arrays G2 and G9 altogether.
Please refer to fig. 3, which is a display brightness adjusting method according to an embodiment of the present application, the method may be executed by the electronic device 1 shown in fig. 1, and may be applied to the display brightness adjusting scenes shown in fig. 2A to 2B, so as to eliminate the instant jump caused by the DS dimming interval, and further avoid the flicker of dimming. The method comprises the following steps:
step 301: and receiving a brightness adjustment instruction for the display screen, wherein the brightness adjustment instruction comprises target brightness.
In this step, the brightness adjustment command may be triggered by an external environment change, and in the process of an external environment light change, if the brightness of the screen is not automatically adjusted, in order to view the display picture of the screen more clearly and more comfortably, the user may manually adjust the brightness of the screen, and the user triggers the brightness adjustment command. If the brightness of the terminal screen is not in accordance with the use habit of the user after the brightness of the terminal screen is automatically adjusted according to the brightness of the ambient light, the user can also manually adjust the brightness of the terminal screen.
In an embodiment, a display device such as a mobile phone or a computer generally includes a brightness adjustment key, through which a user changes an input brightness adjustment command, where the brightness adjustment command at least includes a target brightness desired by the user, and the target brightness can be represented by a display brightness level DBV, where a display brightness corresponding to a maximum gray level in each display brightness level is different, and after a display brightness corresponding to the maximum gray level in a display panel is changed, a display brightness corresponding to other gray levels is also changed. Specifically, when the display luminance corresponding to the maximum gray scale in the display panel increases, the display luminance corresponding to the other gray scales also increases. When the display luminance corresponding to the maximum gray scale in the display panel decreases, the display luminance corresponding to the other gray scales also decreases. That is, when the display luminance corresponding to the maximum gray level in the display panel is large, the luminance level is large, and the display luminance of the entire display panel is large. When the display brightness corresponding to the maximum gray level in the display panel is smaller, the brightness level is smaller, and the display brightness of the whole display panel is smaller.
Step 302: the method comprises the steps of determining a target dimming interval in which target brightness is located and a previous dimming interval adjacent to the target dimming interval, wherein the display screen comprises a plurality of dimming intervals, and the first node brightness of the previous dimming interval is smaller than the second node brightness of the target dimming interval.
In this step, the brightness of the display screen is divided into a plurality of dimming intervals in advance, different dimming modes can be adopted in different dimming intervals, and the same dimming mode can be adopted in all dimming intervals. The dividing results of the dimming intervals corresponding to different brightness levels can be sequentially stored in a table according to the brightness levels from small to large, and the target dimming interval where the target brightness is and the previous dimming interval adjacent to the target dimming interval are searched through a table look-up mode.
As shown in fig. 4, a schematic view of dividing a dimming interval in this embodiment is shown, the abscissa is a display brightness level BDV value, the ordinate is a data scaling ratio ds_ratio corresponding to DS dimming, the display screen is an OLED panel, and the OLED panel is assumed to be a 13-bit panel, the maximum brightness Max of the OLED panel is 8192, the display brightness level BDV is divided into 11 dimming intervals, which are respectively a dimming interval Area0 to a dimming interval Area10, the node brightness levels corresponding to a dimming interval Area0 to a dimming interval Area9 are respectively a ds_th0 to a ds_th9, and the node brightness level corresponding to a dimming interval Area10 is 8191. Assuming that three dimming modes of PWM, DS and Gamma are mixed, wherein a leveling zone (alpha) is a dimming mode using Gamma or PWM, a data scaling rate DS_ratio in the area needs to be kept unchanged, a rising zone (beta) is a dimming mode using DS, the rising mode needs to meet an inverse Gamma curve, and in an actual scene, the leveling zone (alpha) and the rising zone (beta) are distributed at intervals.
In one embodiment, before step 302, the method further includes: and judging whether the target brightness is within a preset dimming interval of data scaling dimming. And when the target brightness is in the preset dimming interval of the data zoom dimming, determining the target dimming interval in which the target brightness is and the previous dimming interval adjacent to the target dimming interval.
In an actual scene, if multiple dimming modes are mixed and used, the brightness range of the display screen is divided into multiple dimming intervals, before DS dimming is performed, whether the target brightness is within a preset dimming interval of the DS dimming can be judged first, the preset dimming interval can be a rising area (β) shown in fig. 4, and only if the target brightness is within the preset dimming interval of the DS dimming, the subsequent DS dimming process is performed, so that invalid calculation is avoided.
Step 303: and determining a target data scaling ratio for the display screen to reach the target brightness according to the brightness of the first node and the scaling ratio of the first node.
In this step, the brightness relationship between the target dimming interval and the previous dimming interval is fully considered, and the target data scaling of the display screen reaching the target brightness is determined based on the first node brightness of the previous dimming interval and the scaling ratio of the first node, so that the dimming result corresponding to the target brightness gradually transits from the low-brightness dimming interval to the target brightness, and instant brightness jump is avoided.
Step 304: and displaying the target image on the display screen according to the target data scaling ratio.
In the step, the dimming process can be completed by scaling the pixel values of the input image according to the target data scaling ratio and displaying the scaled pixel values in the data scaling mode, wherein the DS dimming process can keep the original pixel value distribution relation of the input image, and finally the content of the input image is kept in the displayed output image, so that only the brightness of the output image is changed.
According to the display brightness regulation and control method, the brightness regulation of the target dimming interval is associated with the node brightness of the previous dimming interval, and the actual dimming result is transited from the node brightness of the previous dimming interval to the target brightness, so that instant jump is avoided when dimming is carried out between two adjacent dimming intervals, and screen flicker caused by the dimming process is avoided.
Please refer to fig. 5, which is a method for adjusting and controlling display brightness according to an embodiment of the present application, the method can be executed by the electronic device 1 shown in fig. 1, and can be applied to the display brightness adjusting and controlling scene shown in fig. 2A to 2B, so as to eliminate the instant jump caused by the DS dimming interval, and further avoid the flicker of dimming. The method comprises the following steps:
step 501: and receiving a brightness adjustment instruction for the display screen, wherein the brightness adjustment instruction comprises target brightness. See the description of step 301 in the above embodiments for details.
Step 502: and mapping the target brightness to a preset reference curve to obtain the target brightness after mapping treatment.
In this step, when the user adjusts the Brightness of the screen, the Brightness change in the ideal state is linear, as shown in fig. 6A, the abscissa is the Brightness level BDV of the display screen, the ordinate is the actual output Brightness bright of the display screen, the perception of the human eye on the light change is not linear, but meets the gamma curve, the subsequent DS dimming calculation needs to calculate the corresponding gamma curve for the target Brightness, the ideal Brightness change line given in fig. 6A is often not zero, the gamma curve corresponding to the DS dimming data scaling ratio ds_ratio is shown in fig. 6B, because the gamma curve shown in fig. 6B is not the origin, the subsequent calculation process is relatively complex, the gamma curve shown in fig. 6B can be mapped to the preset reference curve shown in fig. 6C in advance for simplifying the calculation complexity, and the reference curve can be the gamma curve passing the origin.
In order to simplify the calculation, the target brightness may also be mapped to a preset reference curve as shown in fig. 6C, to obtain the target brightness after the mapping process, and taking the 13bit OLED panel as an example, the full brightness Max is 8192, and assuming that the original target brightness is DBV, the target brightness main_dbv after the mapping process may be obtained according to the following formula:
where l_min_a is the initial brightness level of the gamma curve as shown in fig. 6B. The gamma parameter γ of the gamma curve shown in fig. 6C may be set based on actual requirements, for example, the value range of γ may be (2.1, 2.2).
Step 503: the method comprises the steps of determining a target dimming interval in which target brightness is located and a previous dimming interval adjacent to the target dimming interval, wherein the display screen comprises a plurality of dimming intervals, and the first node brightness of the previous dimming interval is smaller than the second node brightness of the target dimming interval. See the description of step 302 in the above embodiments for details.
In an embodiment, when the node brightness of each dimming interval is preset, the mapped node brightness may also be obtained by mapping the node brightness onto a reference curve as shown in fig. 6C, so as to simplify the calculation process, and each dsl_thi node brightness as shown in fig. 4 may be mapped onto the reference curve as shown in fig. 6C by the following formula, so as to obtain the mapped node brightness main_dsl_th:
wherein i is the dimming interval number of the display screen, i is an integer greater than or equal to 0, DSL_THi is the initial node brightness of the ith dimming interval, and main_DSL_THi is the node brightness of the ith dimming interval after mapping processing. The step of presetting the node brightness of each dimming interval may precede step 502.
In an embodiment, as shown in fig. 6D, which is a schematic diagram of a dimming interval division in the embodiment of the present application, based on the dimming interval division shown in fig. 4, the node data scaling ratio Y [ i ], i corresponding to the node brightness of each dimming interval, may be set as the index of the dimming interval through pre-debugging, and the node data scaling ratio Y [ i ] of each dimming interval may be configured by the following formula:
y [ i ] = Y [ i-1], i is an even number greater than 1
Where γ may be a gamma parameter of a reference curve as shown in fig. 6C, Y [0] is a node data scaling ratio of the 0 TH dimming interval Area0, Y [ i ] is a node data scaling ratio of the i TH dimming interval Area, main_dsl_th (i-1) is a node brightness of the (i-1) TH dimming interval Area (i-1), if Area is a target dimming interval where the target brightness is located, area (i-1) is the previous dimming interval, and the first node brightness main_dsl_th (i-1) is smaller than the second node brightness main_dsl_thi.
Step 504: when the target brightness is in a preset dimming interval of data scaling dimming, calculating to obtain an initial scaling ratio according to the brightness of the first node and the scaling ratio of the first node.
In this step, assuming that the target brightness is within the preset dimming interval of the data scaling dimming, it is explained that the DS dimming mode is required to be adopted in the current dimming, the initial scaling ratio ds_ratio_t [ i ] of the current DS dimming may be calculated based on the first node brightness main_dsl_th (i-1) and the scaling ratio Y [ i-1] of the first node.
In one embodiment, step 504 may include: when the target brightness is within the preset dimming interval of the data zoom dimming, that is, the target brightness is in the rising region (β) as shown in fig. 4, the initial zoom ratio is calculated using the following formula:
i is an odd number
The main_dbv is the target brightness after mapping processing, and the target dimming interval is the ith dimming interval of the display screen. DS_ratio_t [ i ] is an initial scaling ratio of an ith dimming interval defined by target brightness main_DBV, the former dimming interval is the (i-1) TH dimming interval, main_DSL_TH (i-1) is the first node brightness of the (i-1) TH dimming interval, and Y [ i-1] is the scaling ratio of the first node of the (i-1) TH dimming interval, wherein i is an integer greater than or equal to 0.
In one embodiment, step 504 may include: when the target brightness is not within the preset dimming interval of the data zoom dimming, that is, the target brightness is in the leveling zone (α) as shown in fig. 4, the initial zoom ratio is calculated using the following formula:
DS_ratio_t[i]＝Y[i]
wherein Y [10] =y9 ], ds_ratio_t [ i ] is an initial scaling ratio of the ith dimming interval, Y [ i ] is a preset node scaling ratio of the ith dimming interval, wherein i is an even number greater than or equal to 0, such as i=0, 2,4,6,8, … ….
Step 505: and determining the target data scaling of the display screen reaching the target brightness according to the initial scaling ratio and the maximum brightness value of the display screen.
In this step, as shown in fig. 6E, the curve No. 1 is a dimming curve where the initial scaling ratio is located, and since the initial scaling ratio may not reach the required maximum brightness value, the lifting process may be performed at the initial scaling ratio, so as to obtain the dimming curve No. 2, so that the final dimming effect may reach the requirement. Similarly, to achieve the target brightness, the initial scaling ratio needs to be processed correspondingly. The maximum brightness value may be obtained from a basic parameter of the display screen. Taking a 13bit OLED panel as an example, the maximum luminance value Max is 8192, the target data scaling ds_ratio [ i ] can be obtained using the following formula:
step 506: and displaying the target image on the display screen according to the target data scaling ratio. See the description of step 304 in the above embodiments for details.
In one embodiment, the input image data may be scaled according to the target data scaling ds_ratio to obtain the output image output data by the following formula:
as shown in fig. 6F, the dashed line is the luminance curve before scaling, the solid line is the luminance curve after scaling, and the output image output data already contains the linear luminance factor, so that the linear dimming purpose can be achieved.
According to the display brightness adjusting and controlling method, the Data adjusting and controlling mode is independent, multiple groups of gamma matching support are not needed, and the Data adjusting and controlling architecture is continuous, so that the jump phenomenon in the prior art is avoided. The method can be used for dimming the display panel independently, and can also be mixed and matched with Gamma/PWM to realize dimming of the display panel.
As shown in fig. 6G, the dimming effect obtained by the DS dimming method alone is compared with that obtained by the DS dimming method.
As shown in fig. 6H, in order to obtain a dimming effect comparison chart by mixing the DS dimming mode with the Gamma and PWM dimming modes, the jump phenomenon can be avoided, the resources can be saved, and a better dimming effect can be obtained.
Please refer to fig. 7, which illustrates a display brightness adjusting device 700 according to an embodiment of the present application, which can be applied to the electronic apparatus 1 illustrated in fig. 1 and can be applied to the display brightness adjusting scenes illustrated in fig. 2A to 2B to eliminate the instant jump caused by the DS dimming interval, so as to avoid the flicker of dimming. The device comprises: the principle relation of the receiving module 701, the first determining module 702, the second determining module 703 and the display module 704 is as follows:
the receiving module 701 is configured to receive a brightness adjustment instruction for a display screen, where the brightness adjustment instruction includes a target brightness.
The first determining module 702 is configured to determine a target dimming interval in which the target brightness is located, and a previous dimming interval adjacent to the target dimming interval, where the display screen includes a plurality of dimming intervals, and a first node brightness of the previous dimming interval is less than a second node brightness of the target dimming interval.
The second determining module 703 is configured to determine, according to the brightness of the first node and the scaling ratio of the first node, a target data scaling ratio for the display screen reaching the target brightness.
And the display module 704 is used for displaying the target image on the display screen according to the target data scaling ratio.
In one embodiment, the method further comprises: the determining module 705 is configured to determine whether the target brightness is within a preset dimming interval of the data zoom dimming before determining a target dimming interval in which the target brightness is located and a previous dimming interval adjacent to the target dimming interval. The second determining module 703 is further configured to: and when the target brightness is in the preset dimming interval of the data zoom dimming, determining the target dimming interval in which the target brightness is and the previous dimming interval adjacent to the target dimming interval.
In one embodiment, the method further comprises: the mapping module 706 is configured to map the target brightness to a preset reference curve before determining a target dimming interval in which the target brightness is located and a previous dimming interval adjacent to the target dimming interval, so as to obtain the target brightness after the mapping process.
In an embodiment, the second determining module 703 is configured to: when the target brightness is in a preset dimming interval of data scaling dimming, calculating to obtain an initial scaling ratio according to the brightness of the first node and the scaling ratio of the first node. And determining the target data scaling of the display screen reaching the target brightness according to the initial scaling ratio and the maximum brightness value of the display screen.
In one embodiment, the method further comprises: when the target brightness is in the preset dimming interval of the data zoom dimming, the initial zoom ratio is calculated by adopting the following formula:
the main_dbv is a target brightness, and the target dimming interval is an ith dimming interval of the display screen. DS_ratio_t [ i ] is an initial scaling ratio of an ith dimming interval defined by target brightness main_DBV, the former dimming interval is the (i-1) TH dimming interval, main_DSL_TH (i-1) is the first node brightness of the (i-1) TH dimming interval, and Y [ i-1] is the scaling ratio of the first node of the (i-1) TH dimming interval, wherein i is an integer greater than or equal to 0.
In one embodiment, the method further comprises: when the target brightness is not in the preset dimming interval of the data zoom dimming, the initial zoom ratio is calculated by adopting the following formula:
DS_ratio_t[i]＝Y[i]
wherein DS_ratio_t [ i ] is the initial scaling ratio of the ith dimming interval, Y [ i ] is the preset node scaling ratio of the ith dimming interval, wherein i is an integer greater than or equal to 0.
For a detailed description of the brightness control apparatus 700, please refer to the description of the related method steps in the above embodiment.
The embodiment of the invention also provides a non-transitory electronic device readable storage medium, which comprises: a program which, when run on an electronic device, causes the electronic device to perform all or part of the flow of the method in the above-described embodiments. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a Flash Memory (Flash Memory), a Hard Disk (HDD), or a Solid State Drive (SSD), etc. The storage medium may also comprise a combination of memories of the kind described above.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations are within the scope of the invention as defined by the appended claims.
Claims (15)
1. A display brightness control method, comprising:
receiving a brightness adjustment instruction for a display screen, wherein the brightness adjustment instruction comprises target brightness;
determining a target dimming interval in which the target brightness is located and a previous dimming interval adjacent to the target dimming interval, wherein the display screen comprises a plurality of dimming intervals, and the first node brightness of the previous dimming interval is smaller than the second node brightness of the target dimming interval;
determining a target data scaling ratio of the display screen reaching the target brightness according to the first node brightness and the scaling ratio of the first node;
and displaying the target image on the display screen according to the target data scaling ratio.
2. The method of claim 1, further comprising, prior to said determining a target dimming interval in which said target brightness is located and a previous dimming interval adjacent to said target dimming interval:
judging whether the target brightness is in a preset dimming interval of data scaling dimming or not;
and when the target brightness is in the preset dimming interval of the data scaling dimming, determining a target dimming interval in which the target brightness is and a previous dimming interval adjacent to the target dimming interval.
3. The method of claim 1, further comprising, prior to said determining a target dimming interval in which said target brightness is located and a previous dimming interval adjacent to said target dimming interval:
and mapping the target brightness to a preset reference curve to obtain the target brightness after mapping processing.
4. The method of claim 2, wherein determining a target data scaling for the display screen to achieve the target brightness based on the first node brightness and a scaling ratio of the first node comprises:
when the target brightness is in the preset dimming interval of the data scaling dimming, calculating to obtain an initial scaling ratio according to the first node brightness and the scaling ratio of the first node;
and determining a target data scaling ratio of the display screen reaching the target brightness according to the initial scaling ratio and the maximum brightness value of the display screen.
5. The method as recited in claim 4, further comprising:
when the target brightness is within the preset dimming interval of the data scaling dimming, the initial scaling ratio is calculated by adopting the following formula:
the main_DBV is the target brightness, and the target dimming interval is the ith dimming interval of the display screen; DS_ratio_t [ i ] is the initial scaling ratio of the ith dimming interval under the limitation of the target brightness main_DBV, the previous dimming interval is the (i-1) TH dimming interval, main_DSL_TH (i-1) is the first node brightness of the (i-1) TH dimming interval, and Y [ i-1] is the scaling ratio of the first node of the (i-1) TH dimming interval, wherein i is an integer greater than or equal to 0.
6. The method as recited in claim 5, further comprising:
when the target brightness is not in the preset dimming interval of the data scaling dimming, the initial scaling ratio is calculated by adopting the following formula:
DS_ratio_t[i]＝Y[i]
wherein DS_ratio_t [ i ] is the initial scaling ratio of the ith dimming interval, Y [ i ] is the preset node scaling ratio of the ith dimming interval, wherein i is an integer greater than or equal to 0.
7. A display brightness control apparatus, comprising:
the receiving module is used for receiving a brightness adjusting instruction for the display screen, wherein the brightness adjusting instruction comprises target brightness;
the display screen comprises a plurality of dimming intervals, wherein the first node brightness of the previous dimming interval is smaller than the second node brightness of the target dimming interval;
the second determining module is used for determining a target data scaling ratio of the display screen reaching the target brightness according to the first node brightness and the scaling ratio of the first node;
and the display module is used for displaying the target image on the display screen according to the target data scaling ratio.
8. The apparatus as recited in claim 7, further comprising:
the judging module is used for judging whether the target brightness is in a preset dimming interval of data zoom dimming before the target dimming interval where the target brightness is determined and a previous dimming interval adjacent to the target dimming interval;
the second determining module is further configured to: and when the target brightness is in the preset dimming interval of the data scaling dimming, determining a target dimming interval in which the target brightness is and a previous dimming interval adjacent to the target dimming interval.
9. The apparatus as recited in claim 7, further comprising:
the mapping module is used for mapping the target brightness to a preset reference curve before the target dimming interval where the target brightness is determined and the previous dimming interval adjacent to the target dimming interval, so as to obtain the target brightness after mapping processing.
10. The apparatus of claim 8, wherein the second determination module is configured to:
when the target brightness is in the preset dimming interval of the data scaling dimming, calculating to obtain an initial scaling ratio according to the first node brightness and the scaling ratio of the first node;
and determining a target data scaling ratio of the display screen reaching the target brightness according to the initial scaling ratio and the maximum brightness value of the display screen.
11. The apparatus as recited in claim 10, further comprising:
when the target brightness is within the preset dimming interval of the data scaling dimming, the initial scaling ratio is calculated by adopting the following formula:
the main_DBV is the target brightness, and the target dimming interval is the ith dimming interval of the display screen; DS_ratio_t [ i ] is the initial scaling ratio of the ith dimming interval under the limitation of the target brightness main_DBV, the previous dimming interval is the (i-1) TH dimming interval, main_DSL_TH (i-1) is the first node brightness of the (i-1) TH dimming interval, and Y [ i-1] is the scaling ratio of the first node of the (i-1) TH dimming interval, wherein i is an integer greater than or equal to 0.
12. The apparatus as recited in claim 11, further comprising:
when the target brightness is not in the preset dimming interval of the data scaling dimming, the initial scaling ratio is calculated by adopting the following formula:
DS_ratio_t[i]＝Y[i]
wherein DS_ratio_t [ i ] is the initial scaling ratio of the ith dimming interval, Y [ i ] is the preset node scaling ratio of the ith dimming interval, wherein i is an integer greater than or equal to 0.
13. An electronic device, comprising:
a memory for storing a computer program;
a processor for executing the computer program to implement the method of any one of claims 1 to 6.
14. A non-transitory electronic device-readable storage medium, comprising: program which, when run by an electronic device, causes the electronic device to perform the method of any one of claims 1 to 6.
15. A display screen for performing the display brightness adjustment method of any one of claims 1 to 6, the display screen comprising:
the display panel of the display screen comprises: an OLED panel, a small-space display screen, a mini LED panel or a micro LED panel.
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