CN112382245A - Backlight adjusting method, device and system and storage medium - Google Patents
Backlight adjusting method, device and system and storage medium Download PDFInfo
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Abstract
The application relates to a backlight adjusting method, a device, a system and a storage medium, which comprises the steps of obtaining the maximum brightness value of a backlight source and the maximum grade value of grade adjustment, and constructing an initial brightness curve capable of reflecting the mapping relation of the brightness value and the grade value; according to an interval division strategy, dividing the range based on the grade values into a plurality of grade intervals which are continuously distributed from small to large according to the grade values, wherein the grade intervals comprise a first interval positioned at the first position and a last interval positioned at the last position; optimizing an initial brightness curve according to a model optimization strategy; the step of optimizing the initial brightness curve comprises the steps of dividing the initial brightness curve based on a head interval and constructing a fine adjustment section, wherein the slope of a tangent line of a point through which a part of the fine adjustment section passes in an ascending trend is increased along with the increase of the grade value; and acquiring a grade input value, acquiring a corresponding brightness output value from the comparison table according to the grade input value, and enabling the backlight source to output the brightness corresponding to the brightness output value. The method and the device have the effect of improving user experience.
Description
Technical Field
The present application relates to the field of backlight adjustment technologies, and in particular, to a method, an apparatus, a system, and a storage medium for backlight adjustment.
Background
At present, electronic products with display screens, such as notebook computers, tablet computers, smart phones and the like, all have the function of adjusting the brightness of the display screens. The maximum brightness of a common display screen in the market is 300cd/m2, and in some occasions, an ultrahigh bright screen with the brightness of 800cd/m2 is also provided, the brightness level of the display screen is generally 10-level or 16-level, and a user can adjust the brightness of the display screen by changing the brightness level. The brightness adjustment of the display screen is usually realized by a PWM (pulse width modulation) technology, and when a user needs to change the brightness of the display screen, the duty ratio of a PWM signal input to the display screen can be adjusted to change the output value of the power supply voltage, thereby changing the brightness of the display screen. The notebook computers on the market are usually provided with a hot key for adjusting brightness, the notebook computers monitor the key actions of users through a built-in processor such as an EC chip, and the EC chip can adjust the backlight brightness of the liquid crystal display screen according to the input key values.
Chinese utility model with an authorization notice number CN206472346U discloses an LED display instrument with adjustable brightness in the related art, which comprises an LED display circuit and a control circuit, wherein the LED display circuit comprises at least 7 LED lamps, and the control circuit comprises one or more 8-bit CMOS shift registers cascaded with each other and a single chip microcomputer electrically connected with the input end of the 8-bit CMOS shift register. The output end of the 8-bit CMOS shift register is electrically connected with the cathode of the LED lamp through 7 pins respectively, the single chip microcomputer outputs PWM signals to the 8-bit CMOS shift register, and the output state of the 8-bit CMOS shift register is controlled by changing the duty ratio of the PWM signals, so that the current of the LED lamp is adjusted.
In view of the above-mentioned related art, the inventor believes that in a conventional display screen brightness adjustment design, a maximum brightness value of the display screen and a minimum brightness value of the display screen are usually preset, and the maximum brightness value and the minimum brightness value are divided into brightness levels in equal proportion, and when a user adjusts the brightness levels, the brightness changes in equal proportion. However, in the process of changing the backlight from dark to light, because the brightness just received by human eyes is very low, the stimulation to the human eyes is large when the brightness changes, and if the brightness is always changed in an equal proportion in the brightness adjusting process, the stimulation to the human eyes is large when the brightness of the backlight just begins to increase, and the user experience is influenced.
Disclosure of Invention
The backlight brightness adjusting method has the advantages that stimulation of the backlight source to human eyes when brightness is increased at the beginning is reduced, and user experience is affected.
The above object of the present invention is achieved by the following technical solutions:
a backlight brightness adjusting method comprises the following steps,
acquiring the maximum brightness value of the backlight source and the maximum grade value of grade adjustment, and constructing an initial brightness curve capable of reflecting the mapping relation of the brightness value and the grade value;
according to an interval division strategy, dividing the range based on the grade values into a plurality of grade intervals which are continuously distributed from small to large according to the grade values, wherein the grade intervals comprise a first interval positioned at the first position and a last interval positioned at the last position;
optimizing an initial brightness curve according to a model optimization strategy;
the step of optimizing the initial brightness curve comprises the steps of dividing the initial brightness curve based on a head interval and constructing a fine adjustment section, wherein the slope of a tangent line of a point through which a part of the fine adjustment section passes in an ascending trend is increased along with the increase of the grade value;
acquiring a comparison table based on a register interface, and storing the brightness value in an address of a level value corresponding to the comparison table;
and acquiring a grade input value, acquiring a corresponding brightness output value from the comparison table according to the grade input value, and enabling the backlight source to output the brightness corresponding to the brightness output value.
By adopting the technical scheme, when the grade value changes, the brightness output value can be obtained according to the comparison table, and the backlight source outputs the corresponding brightness value. And establishing an initial brightness curve capable of reflecting the mapping relation between the brightness values and the grade values, wherein the slope of the initial brightness curve can represent the change amplitude of the brightness values after each grade value is changed by one grade. Dividing each grade interval, and then acquiring a first interval and a last interval from each grade interval, wherein the grade value in the first interval is equivalent to each grade adjusted when the backlight source starts to work; the gradation value in the last section corresponds to each gradation at which the luminance of the backlight is to be maximized. By optimizing the part of the initial brightness curve corresponding to the first interval, a fine adjustment segment can be obtained on the brightness curve, and the slope of the tangent line of the point through which the part of the fine adjustment segment which is in the ascending trend passes increases with the increase of the grade value, which is equivalent to that when the grade value in the first interval is gradually increased, not only the brightness value but also the change amplitude of the brightness value gradually increases. When the backlight source starts to work, the change range of the brightness value is small after the grade value is increased, the stimulation to human eyes is reduced when the brightness value is increased, and the user experience is improved.
The present application may be further configured in a preferred example to: the construction of the fine tuning section comprises the following steps:
the first optimization model is based on the fact that the leading interval preset derivative value is increased along with the increase of the grade value;
and replacing the part of the initial brightness curve corresponding to the first interval by the first optimization model to obtain a fine adjustment section.
By adopting the technical scheme, the derivative value of the first optimization model is increased along with the increase of the grade value, namely the slope of the tangent of the point where the first optimization model passes through is increased along with the increase of the grade value, the curve characteristic of the fine adjustment section is obtained, the initial brightness curve in the head interval is replaced by the first optimization model, and the fine adjustment section is obtained.
The present application may be further configured in a preferred example to: the first optimization model is, Y ═ x (n ×)2Where Y is the luminance value and x is the rank value.
By adopting the technical scheme, the larger the dependent variable of the first optimization model is, the larger the change amplitude of the derivative value is when the grade value is increased, the first optimization model is selected as the 2-time function model, the risk that a user is difficult to adjust the backlight source to a high-brightness state due to too slow change of the brightness value can be reduced, the risk that the dimming optimization effect is not obvious due to too fast change of the brightness value can be reduced, and the setting of the fine adjustment section is more in line with practical application.
The present application may be further configured in a preferred example to: the step of optimizing the initial brightness curve further comprises dividing the initial brightness curve based on the last interval and constructing a rapid-increase section, wherein the slope of a tangent line of a point through which a part of the rapid-increase section passes in an ascending trend increases as the grade value becomes larger.
By adopting the technical scheme, the grade value in the last section is equivalent to each grade when the brightness of the backlight source is about to reach the maximum value. By optimizing the part of the initial brightness curve corresponding to the last interval, a rapid-increase section can be obtained on the brightness curve, the slope of the tangent line of the point where the part of the rapid-increase section which is in the ascending trend passes increases with the increase of the grade value, which is equivalent to that when the grade value in the last interval is gradually increased, not only the brightness value but also the change amplitude of the brightness value gradually increases; when the brightness of the backlight source is large, the change range of the brightness value is improved, and a user can conveniently adjust the brightness value to the maximum value.
The present application may be further configured in a preferred example to: the grade interval also comprises a transition interval between a first interval and a last interval;
the step of optimizing the initial luminance profile further comprises,
and dividing an initial brightness curve based on the transition section and constructing a transition section, wherein the slope of a tangent line of a point through which the transition section passes in an ascending trend part is increased along with the increase of the grade value.
By adopting the technical scheme, the transition section is connected with the fine adjustment section and the fast increasing section, so that the transition between the fine adjustment section and the fast increasing section is smoother, and the fluency of brightness value change is improved.
The present application may be further configured in a preferred example to:
the slope of the tangent line at the highest point of the transition section is equal to that at the lowest point of the fast-increasing section,
the slope of the tangent line at the lowest point of the transition section is equal to that of the highest point of the smooth section.
By adopting the technical scheme, the lowest point of the transition section is connected with the highest point of the fine adjustment section, and the highest point of the transition section is connected with the lowest point of the rapid-increase section, so that the connection among the fine adjustment section, the transition section and the rapid-increase section is smoother.
The second purpose of the application is to provide a backlight brightness adjusting device, which has the characteristic of reducing the stimulation of the backlight source to human eyes when the brightness is increased at the beginning and influencing the user experience.
The second objective of the present invention is achieved by the following technical solutions:
a backlight brightness adjusting device comprises a model generating module, a model generating module and a display module, wherein the model generating module is used for acquiring the maximum brightness value of a backlight source and the maximum grade value of grade adjustment and constructing an initial brightness curve capable of reflecting the mapping relation of the brightness value and the grade value; the interval generation module is used for dividing the range of the grade values into a plurality of grade intervals which are continuously distributed from small to large according to the grade values, and the grade intervals comprise a first interval positioned at the first position and a last interval positioned at the last position; and the number of the first and second groups,
a model optimization module for optimizing an initial luminance curve according to a curve optimization strategy, comprising,
the first optimization submodule is used for dividing an initial brightness curve based on a first interval and constructing a fine adjustment section; and the number of the first and second groups,
the data registering module is used for acquiring a comparison table based on the register interface and storing the brightness value in an address of a grade value corresponding to the comparison table; and the execution module is used for acquiring the grade input value, acquiring a corresponding brightness output value from the comparison table according to the grade input value, and enabling the backlight source to output the brightness corresponding to the brightness output value.
The third purpose of the present application is to provide a backlight brightness adjusting system, which has the characteristics of reducing the stimulation of the backlight source to human eyes when the brightness is increased at the beginning, and affecting the user experience.
The third object of the invention is achieved by the following technical scheme:
a backlight brightness adjustment system comprising a memory and a processor, the memory having stored thereon a computer program that can be loaded by the processor and that executes a backlight brightness adjustment method as described above.
The fourth purpose of the present application is to provide a computer storage medium, which can store corresponding programs, and has the characteristics of reducing the stimulation of the backlight source to human eyes when the brightness is increased at the beginning, and affecting the user experience.
The fourth object of the present invention is achieved by the following technical solutions:
a computer readable storage medium storing a computer program that can be loaded by a processor and executed to perform any of the above-described backlight brightness adjustment methods.
Drawings
Fig. 1 is a block flow diagram of a backlight brightness adjusting method in the present application.
Fig. 2 is a schematic diagram of an initial brightness curve of a flow of a backlight brightness adjusting method.
Fig. 3 is a schematic diagram of a first optimization model of the backlight brightness adjusting method.
Fig. 4 is a diagram illustrating a final luminance curve of a flow of the backlight luminance adjusting method.
Fig. 5 is a block diagram of a backlight brightness adjusting apparatus according to the present application.
In the figure, 1, a model generation module; 2. an interval generation module; 3. a model optimization module; 31. a first optimization submodule; 32. a last optimization submodule; 33. a transition optimization submodule; 4. a data registering module; 5. and executing the module.
Detailed Description
In the backlight brightness adjustment of the display screen, after the level value of the brightness changes, the controller generally outputs PWM signals with different duty ratios to the power supply of the backlight, and the power supply receives the PWM signals and then outputs corresponding current signals to the backlight to control the brightness value. In the design of the brightness levels of the display screen backlight, the maximum brightness value and the minimum brightness value are divided into the brightness levels in equal proportion, and the brightness values have equal variation after each level of brightness change. However, the backlight source usually changes from dark to light when operating, and when the brightness value is low at the beginning, because the degree of illumination to human eyes is light, if the brightness value changes greatly, the human eyes can be stimulated greatly; and as the brightness value gradually increases, after human eyes adapt to illumination for a period of time, the stimulation of the change of the brightness value to the human eyes gradually decreases, and at the moment, if the change of the brightness value is small, the human eyes can hardly perceive the change of the brightness value, so that the user experience is poor.
The present application is described in further detail below with reference to the attached drawings.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Example one
The backlight brightness adjusting method disclosed by the invention is applied to brightness adjustment of a backlight source, optimizes a traditional brightness adjusting mode by adjusting the change amplitude of the brightness change, and achieves the effect of improving user experience.
As shown in fig. 1, the maximum brightness value is the brightness value when the backlight reaches the maximum brightness state, and the maximum brightness value determines the adjustable range of the brightness of the backlight; the maximum grade value is the grade value when the brightness value is maximum, and the adjustable range of grade adjustment is realized. The initial brightness curve is used for reflecting the mapping relation between the brightness value and the grade value. In the step of generating the initial brightness curve, a coordinate system may be established in which the gradation values are distributed in the X-axis direction and the brightness values are distributed in the Y-axis direction, and formula (1) for presetting the initial brightness curve is as follows,
Y＝A*X+B (1)
wherein Y is a brightness value, X is a gradation value,
as shown in fig. 1 and 2, the preset maximum brightness value is LmaxMinimum brightness value of LminThe maximum gradation value is GmaxThe minimum rank value is Gmin. In this embodiment, the maximum luminance is 800cd/m2Backlight source and PWM register capable of storing 256 levels as an exampleMaximum rank value GmaxIs 255, minimum rating value GminIs 0, the maximum brightness value LmaxIs 800, the minimum brightness value LminFor example, by substituting the point (255,800) and the point (0,0) into the formula (1), the slope A ≈ 3.14 can be calculated, and the following formula (2) can be obtained,
Y＝3.14*X (2)
wherein, Y is a brightness value, X is a gradation value, and the function model of formula (2) is used as an initial brightness curve.
And S20, dividing the range into a plurality of grade intervals according to the interval division strategy and based on the grade value range.
As shown in fig. 2, the interval division strategy refers to dividing the grade range into a plurality of grade intervals with closer sizes as soon as possible according to an equal proportion division mode. In the present embodiment, the number of preset level intervals is 3, and includes a leading interval g1, a transition interval g2, and a trailing interval g3, where the leading interval g1 is [ x0, x1], the transition interval g2 is (x1, x2], and the trailing interval g3 is (x2, x3 ]. in the present embodiment, x0 is 0, x1 is 85, x2 is 175, and x3 is 255.
A first interval g1, a transition interval g2 and a last interval g3 are distributed in a connecting manner according to the order of the grade values from small to large, the first interval g1 is located at the first position, the last interval g3 is located at the last position, and the transition interval g2 is located between the first interval g1 and the last interval g 3; in the process of gradually increasing the grade value, the points on the initial brightness curve pass through a leading section g1, a transition section g2 and a last section g3 in sequence.
S30, optimizing an initial brightness curve according to a model optimization strategy;
as shown in fig. 2 and fig. 3, the model optimization strategy is to preset a corresponding power function model based on the level interval, and replace the initial brightness curve in the corresponding level interval with the power function model to optimize the initial brightness curve, so as to achieve the effect of adjusting the mapping relationship between the brightness value and the level value.
In the step of S30, including,
s301, dividing the initial brightness curve based on the leading interval g1, replacing the part, corresponding to the leading interval g1, of the initial brightness curve by the first optimization model based on the first optimization model of which the leading interval g1 preset derivative value increases along with the increase of the grade value, and obtaining a fine adjustment section.
As shown in fig. 2 and 3, in particular, formula (3) of the first optimization model is as follows,
wherein, Y is a brightness value, and X is a grade value.
The constructed fine tuning section also has the function characteristic of the first optimization model, and because the formula (3) is a power function, the tangent slope of a point through which the fine tuning section passes at the ascending trend part is increased along with the increase of the grade value, namely in the first interval g1, along with the increase of the grade value, the brightness value is increased, and the change amplitude of the brightness value is gradually increased; the smaller the current luminance value is, the smaller the magnitude of change in luminance value after each level value is changed.
In an actual application scene, when the backlight source is in a state with a low brightness level or the backlight source starts to work, the stimulation of the brightness change to human eyes is large, and the increase of the brightness value in the head interval g1 is more gradual by constructing the fine adjustment section, so that the stimulation to the human eyes can be reduced, and the user experience can be improved.
Specifically, m in the present embodiment1The value of (2) can keep the effect of optimizing the brightness change range, and simultaneously avoid that the brightness value changes too slowly to cause that a user is difficult to adjust the backlight source to the transition region g2, so that the setting of the fine adjustment section is more in line with the practical application. In other embodiments, m may also be adjusted according to actual usage scenarios1The value of (a).
S302, dividing the initial brightness curve based on the last interval g3, presetting a second optimization model with derivative values increasing along with the increase of the grade values based on the last interval g3, and replacing the part, corresponding to the last interval g3, of the initial brightness curve with the second optimization model to obtain a rapid increase section.
As shown in fig. 2 and 3, in particular, formula (4) of the second optimization model is as follows,
wherein, Y is a brightness value, and X is a grade value.
The constructed rapid-increase section also has the function characteristic of the second optimization model, and because the formula (4) is a power function, the slope of the tangent of the point through which the rapid-increase section passes in the ascending trend part increases as the grade value becomes larger, which is equivalent to that in the last section g3, the larger the current brightness value is, the larger the change amplitude of the brightness value after each grade value changes by one grade is.
In an actual application scene, when the backlight source is in a state with a higher brightness level or the backlight source works for a period of time, human eyes are adaptive to the change of brightness, namely the change of the brightness value has less stimulation to the human eyes; if the brightness value still keeps the state of low variation range, it will be difficult for the user to distinguish or perceive the increase of brightness when continuously increasing the brightness, and the user experience will be affected. By constructing the rapid increase section, the increase of the brightness value in the last interval g3 can be more rapid, the brightness value can be conveniently adjusted to the maximum by a user, and the user experience is improved.
And S303, dividing the initial brightness curve based on the transition section g2, replacing the part of the initial brightness curve corresponding to the transition section g2 with a third optimization model based on the third optimization model with the transition section g2 preset derivative value increasing along with the increasing of the grade value, obtaining the transition section, and generating a final brightness curve based on the fine adjustment section, the transition section and the rapid-increase section.
As shown in fig. 2 and 3, in particular, formula (5) of the third optimization model is as follows,
wherein, Y is a brightness value, and X is a grade value.
The constructed transition section also has the functional characteristics of the third optimization model, and since the formula (5) is a power function, the slope of the tangent of the point through which the transition section passes in the ascending trend part increases as the grade value increases, that is, in the transition section g2, as the grade value increases, not only the brightness value increases, but also the change amplitude of the brightness value gradually increases. Because the transition section g2 is located between the first section g1 and the last section g3, the transition section is established through the third optimization model, the connection transition effect can be achieved between the fine adjustment section and the rapid increase section, and the whole change of the brightness value is smoother.
Through the steps of S301 to S303, the following formula (3), formula (4), and formula (5) can be obtained,
wherein, Y is a brightness value, and X is a grade value.
Furthermore, in order to reduce the sudden change of the brightness value at the boundary between the first section g1 and the transition section g2 or the boundary between the transition section g2 and the last section g3, and achieve a better transition effect, the slope of the tangent at the highest point of the transition section is equal to the slope of the tangent at the lowest point of the fast increasing section, and the slope of the tangent at the lowest point of the transition section is equal to the slope of the tangent at the highest point of the smooth section, i.e. the final brightness curve forms a smooth curve.
As shown in fig. 4, equation (6) for presetting the final luminance curve is as follows,
wherein, Y is a brightness value, and X is a grade value.
Substituting the point (255,800) into equation (6), and according to the step of S301, mkSubstituting equation (6) with 2 can calculate nkR 0.110919, the final equation (7) is obtained as follows,
Y＝(0.110919*X)2 (7)
wherein, Y is a brightness value, and X is a grade value.
And S40, acquiring a comparison table based on the register interface, and storing the brightness value in the address of the level value corresponding to the comparison table.
As shown in fig. 1, specifically, by substituting the gradation values into formula (7), all the luminance values corresponding to the respective gradation values can be calculated, generating a sequence table reflecting the mapping relationship between the gradation values and the luminance values.
The specific sequence table is as follows:
rank value in example one of the sequence Listing and luminance value in example one
Because a linear relation exists between the magnitude of the grade value and the occupation ratio of the PWM signal, an output table reflecting the mapping relation between the brightness value and the PWM signal can be generated through the sequence table, and the output table is stored in the memory. When the controller needs to adjust the level value, the address corresponding to the brightness value can be obtained from the comparison table of the register based on the level value, and the PWM signal of the corresponding duty ratio can be called from the output table.
And S50, acquiring the grade input value, acquiring the corresponding brightness output value from the comparison table according to the grade input value, and enabling the backlight source to output the brightness corresponding to the brightness output value.
As shown in fig. 1, the controller may obtain an address of a corresponding luminance value from the lookup table of the register based on the gradation input value, select a PWM signal of a corresponding duty ratio from the output table, and output the called PWM signal to the power supply for supplying power to the backlight, and then the power supply may change the output power based on the PWM signal to cause the backlight to output the luminance corresponding to the luminance output value. In this embodiment, the controller is an EC (embedded controller).
In conclusion, the initial brightness curve between the brightness value and the grade value is established first, and then the first optimization model, the second optimization model and the third optimization model are used for optimizing three parts of the initial brightness curve at the same time to obtain the final brightness curve, the whole brightness curve is smooth, and the whole illumination change in the brightness adjusting process is smooth. The final luminance curve includes a fine adjustment segment having an overall lower luminance value and a fast-increasing segment having an overall higher luminance value. When the brightness value changes in the fine adjustment segment, the change amplitude of the brightness value is reduced along with the reduction of the grade value, and the stimulation of the brightness value change to human eyes is reduced when the brightness is in a low state or the backlight source starts to work. When the brightness value changes in the fast-increasing section, the change amplitude of the brightness value increases along with the increase of the grade value, so that a user can conveniently and rapidly adjust the backlight source to a high-brightness state.
Example two
As shown in fig. 5, in an embodiment, a backlight brightness adjusting apparatus is provided, which corresponds to the backlight brightness adjusting method in the first embodiment one to one, and the apparatus includes a model generating module 1, an interval generating module 2, a model optimizing module 3, a data registering module 4, and an executing module 5. The functional modules are explained in detail as follows:
the model generation module 1 is used for acquiring the maximum brightness value of the backlight source and the maximum grade value of grade adjustment, and constructing an initial brightness curve capable of reflecting the mapping relation between the brightness value and the grade value; and the number of the first and second groups,
the interval generation module 2 is used for dividing the grade values into a plurality of grade intervals which are continuously distributed from small to large according to the grade values, wherein the grade intervals comprise a first interval g1 positioned at the head and a last interval g3 positioned at the tail; and the number of the first and second groups,
a model optimization module 3 for optimizing an initial luminance curve according to a curve optimization strategy, comprising,
the head optimization submodule 31 is used for dividing an initial brightness curve based on a head interval g1 and constructing a fine adjustment segment; and the number of the first and second groups,
the last optimization submodule 32 is used for dividing an initial brightness curve and constructing a rapid increase section based on a last interval g 3; and the number of the first and second groups,
the transition optimization submodule 33 is used for dividing an initial brightness curve based on the transition interval g2 and constructing a transition section; and the number of the first and second groups,
the data registering module 4 is used for acquiring a comparison table based on the register interface, and storing the brightness value in an address of a grade value corresponding to the comparison table according to a sequence storage strategy; and the number of the first and second groups,
and the execution module 5 is used for acquiring the grade input value, acquiring a corresponding brightness output value from the comparison table according to the grade input value, and enabling the output of the backlight source to correspond to the brightness value of the brightness output value.
Example three:
in one embodiment, an intelligent terminal is provided and includes a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the memory stores training data, algorithm formulas, filtering mechanisms, and the like in a training model. The processor is used for providing calculation and control capability, and the processor realizes the following steps when executing the computer program:
s10, acquiring the maximum brightness value of the backlight source and the maximum grade value of the grade adjustment, and constructing an initial brightness curve capable of reflecting the mapping relation of the brightness value and the grade value;
s20, dividing the range into a plurality of grade intervals which are continuously distributed from small to large according to the grade values based on the grade value range according to an interval division strategy, wherein the grade intervals comprise a first interval g1 positioned at the first position and a last interval g3 positioned at the last position;
s30, optimizing an initial brightness curve according to a model optimization strategy;
s301, dividing an initial brightness curve based on a head interval g1 and constructing a fine adjustment section, wherein the slope of a tangent line of a point through which a part of the fine adjustment section in an ascending trend passes is increased along with the increase of the grade value;
s302, dividing an initial brightness curve based on a last interval g3 and constructing a rapid increase section, wherein the slope of a tangent line of a point through which a part of the rapid increase section passes in an ascending trend increases along with the increase of the grade value;
s303, dividing an initial brightness curve based on a transition section g2 and constructing a transition section, wherein the slope of a tangent line of a point through which a part of the transition section with an ascending trend passes is increased along with the increase of the grade value;
s40, acquiring a comparison table based on the register interface, and storing the brightness value in the address of the level value corresponding to the comparison table;
and S50, acquiring the grade input value, acquiring the corresponding brightness output value from the comparison table according to the grade input value, and enabling the backlight source to output the brightness corresponding to the brightness output value.
Example four:
in one embodiment, a computer-readable storage medium is provided, which stores a computer program that can be loaded by a processor and executes the above-mentioned small-area fingerprint image feature extraction method, and when executed by the processor, the computer program realizes the following steps:
s10, acquiring the maximum brightness value of the backlight source and the maximum grade value of the grade adjustment, and constructing an initial brightness curve capable of reflecting the mapping relation of the brightness value and the grade value;
s20, dividing the range into a plurality of grade intervals which are continuously distributed from small to large according to the grade values based on the grade value range according to an interval division strategy, wherein the grade intervals comprise a first interval g1 positioned at the first position and a last interval g3 positioned at the last position;
s30, optimizing an initial brightness curve according to a model optimization strategy;
s301, dividing an initial brightness curve based on a head interval g1 and constructing a fine adjustment section, wherein the slope of a tangent line of a point through which a part of the fine adjustment section in an ascending trend passes is increased along with the increase of the grade value;
s302, dividing an initial brightness curve based on a last interval g3 and constructing a rapid increase section, wherein the slope of a tangent line of a point through which a part of the rapid increase section passes in an ascending trend increases along with the increase of the grade value;
s303, dividing an initial brightness curve based on a transition section g2 and constructing a transition section, wherein the slope of a tangent line of a point through which a part of the transition section with an ascending trend passes is increased along with the increase of the grade value;
s40, acquiring a comparison table based on the register interface, and storing the brightness value in the address of the level value corresponding to the comparison table;
and S50, acquiring the grade input value, acquiring the corresponding brightness output value from the comparison table according to the grade input value, and enabling the backlight source to output the brightness corresponding to the brightness output value.
The computer-readable storage medium includes, for example: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. A backlight brightness adjusting method is characterized by comprising the following steps,
acquiring the maximum brightness value of the backlight source and the maximum grade value of grade adjustment, and constructing an initial brightness curve capable of reflecting the mapping relation of the brightness value and the grade value;
according to an interval division strategy, dividing the range based on the grade values into a plurality of grade intervals which are continuously distributed from small to large according to the grade values, wherein the grade intervals comprise a first interval positioned at the first position and a last interval positioned at the last position;
optimizing an initial brightness curve according to a model optimization strategy;
the step of optimizing the initial brightness curve comprises the steps of dividing the initial brightness curve based on a head interval and constructing a fine adjustment section, wherein the slope of a tangent line of a point through which a part of the fine adjustment section passes in an ascending trend is increased along with the increase of the grade value;
acquiring a comparison table based on a register interface, and storing the brightness value in an address of a level value corresponding to the comparison table;
and acquiring a grade input value, acquiring a corresponding brightness output value from the comparison table according to the grade input value, and enabling the backlight source to output the brightness corresponding to the brightness output value.
2. The backlight brightness adjustment method according to claim 1, wherein the constructing the fine adjustment segment comprises the steps of:
the first optimization model is based on the fact that the leading interval preset derivative value is increased along with the increase of the grade value;
and replacing the part of the initial brightness curve corresponding to the first interval by the first optimization model to obtain a fine adjustment section.
3. The backlight brightness adjustment method according to claim 2, wherein the first optimization model is,
Y＝(n*x)2where Y is the luminance value and x is the rank value.
4. The backlight brightness adjustment method according to claim 1, wherein the step of optimizing the initial brightness curve further comprises,
and dividing an initial brightness curve based on the last interval and constructing a rapid increase section, wherein the slope of a tangent line of a point which is passed by the upward trend part of the rapid increase section is increased along with the increase of the grade value.
5. The backlight brightness adjusting method according to claim 4, wherein the level interval further comprises a transition interval between a leading interval and a trailing interval;
the step of optimizing the initial luminance profile further comprises,
and dividing an initial brightness curve based on the transition section and constructing a transition section, wherein the slope of a tangent line of a point through which the transition section passes in an ascending trend part is increased along with the increase of the grade value.
6. The backlight brightness adjusting method according to claim 5,
the slope of the tangent line at the highest point of the transition section is equal to that at the lowest point of the fast-increasing section,
the slope of the tangent line at the lowest point of the transition section is equal to that of the highest point of the smooth section.
7. A backlight brightness adjusting device is characterized by comprising,
the model generation module (1) is used for acquiring the maximum brightness value of the backlight source and the maximum grade value of grade adjustment and constructing an initial brightness curve capable of reflecting the mapping relation of the brightness value and the grade value; and the number of the first and second groups,
the interval generation module (2) is used for dividing the range of the grade values into a plurality of grade intervals which are continuously distributed from small to large according to the grade values, and each grade interval comprises a first interval positioned at the first position and a last interval positioned at the last position; and the number of the first and second groups,
a model optimization module (3) for optimizing an initial luminance curve according to a curve optimization strategy, comprising,
a first optimization submodule (31) for dividing an initial brightness curve based on the first interval and constructing a fine adjustment segment; and the number of the first and second groups,
the data registering module (4) is used for acquiring a comparison table based on the register interface and storing the brightness value in the address of the level value corresponding to the comparison table; and the number of the first and second groups,
and the execution module (5) is used for acquiring the grade input value, acquiring a corresponding brightness output value from the comparison table according to the grade input value, and enabling the backlight source to output the brightness corresponding to the brightness output value.
8. A backlight brightness adjustment system, comprising a memory and a processor, the memory having stored thereon a computer program that can be loaded by the processor and that executes the method according to any of claims 1 to 6.
9. A computer-readable storage medium, in which a computer program is stored which can be loaded by a processor and which executes the method of any one of claims 1 to 6.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113889045A (en) * | 2021-11-01 | 2022-01-04 | 中航华东光电有限公司 | Method for treating backlight light pollution of liquid crystal display |
| CN114420071A (en) * | 2022-01-28 | 2022-04-29 | Oppo广东移动通信有限公司 | Brightness calibration method, brightness calibration device, electronic equipment and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104168371A (en) * | 2014-08-08 | 2014-11-26 | Tcl通讯（宁波）有限公司 | Method for adjusting backlight brightness of mobile terminal and mobile terminal |
| CN106875898A (en) * | 2017-01-17 | 2017-06-20 | 青岛海信电器股份有限公司 | Method and device, the liquid crystal display device of brightness of illumination are adjusted by backlight illumination |
| CN106997750A (en) * | 2017-04-28 | 2017-08-01 | 努比亚技术有限公司 | Terminal screen backlight adjusting method, mobile terminal and computer-readable recording medium |
| CN110890071A (en) * | 2019-11-20 | 2020-03-17 | 东风电驱动系统有限公司 | Instrument backlight adjusting method and device |
| CN111681614A (en) * | 2020-06-18 | 2020-09-18 | 上海闻泰电子科技有限公司 | Backlight brightness value adjusting method and device, electronic equipment and storage medium |
-
2020
- 2020-11-20 CN CN202011313516.3A patent/CN112382245A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104168371A (en) * | 2014-08-08 | 2014-11-26 | Tcl通讯（宁波）有限公司 | Method for adjusting backlight brightness of mobile terminal and mobile terminal |
| CN106875898A (en) * | 2017-01-17 | 2017-06-20 | 青岛海信电器股份有限公司 | Method and device, the liquid crystal display device of brightness of illumination are adjusted by backlight illumination |
| CN106997750A (en) * | 2017-04-28 | 2017-08-01 | 努比亚技术有限公司 | Terminal screen backlight adjusting method, mobile terminal and computer-readable recording medium |
| CN110890071A (en) * | 2019-11-20 | 2020-03-17 | 东风电驱动系统有限公司 | Instrument backlight adjusting method and device |
| CN111681614A (en) * | 2020-06-18 | 2020-09-18 | 上海闻泰电子科技有限公司 | Backlight brightness value adjusting method and device, electronic equipment and storage medium |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113889045A (en) * | 2021-11-01 | 2022-01-04 | 中航华东光电有限公司 | Method for treating backlight light pollution of liquid crystal display |
| CN114420071A (en) * | 2022-01-28 | 2022-04-29 | Oppo广东移动通信有限公司 | Brightness calibration method, brightness calibration device, electronic equipment and storage medium |
| CN114420071B (en) * | 2022-01-28 | 2023-08-25 | Oppo广东移动通信有限公司 | Brightness calibration method, brightness calibration device, electronic equipment and storage medium |
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