CN114333708A - Display brightness obtaining method, automatic adjusting method and related equipment - Google Patents
Display brightness obtaining method, automatic adjusting method and related equipment Download PDFInfo
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Abstract
The invention provides a display brightness obtaining method, an automatic adjusting method and related equipment thereof, wherein the display brightness obtaining method comprises the steps of obtaining the working time of a display; calculating the backlight lamp luminous flux based on the working time and backlight lamp aging data corresponding to the display; and calculating the brightness of the display according to the luminous flux of the backlight lamp. According to the method for acquiring the brightness of the display, the luminous flux corresponding to the working time can be acquired only by depending on the backlight aging data corresponding to the display, and then the luminous flux is converted into the brightness of the display, so that the reliability of acquiring the brightness of the display is improved, and the cost of the display is reduced.
Description
Technical Field
The invention relates to the technical field of displays, in particular to a display brightness obtaining method, an automatic adjusting method and related equipment.
Background
In recent years, with the development of science and technology and the improvement of living standard of people, computer equipment is more and more compact with the life of people. When the backlight brightness of the display in the computer device is not in harmony with the ambient light intensity, the human eyes will have visual fatigue, and the visual fatigue will cause irreversible damage to the human eyes. The service life of the display is directly influenced by overhigh brightness of the display; too low in turn affects the display performance of the display. Therefore, the brightness adjustment becomes a necessary function for display. It is also a necessary task to obtain the display brightness before brightness adjustment.
At present, the brightness of a display is acquired indirectly through acquiring the backlight brightness by a backlight sensor or acquired directly through acquiring the display brightness by a brightness sensor, the brightness of the display and the display brightness are both acquired by the sensor, if the sensor fails or the connection of the sensor is unreliable, an abnormal phenomenon can be caused, and the brightness adjustment cannot be realized. Meanwhile, the cost is increased because a dedicated sensor needs to be additionally assembled in the display.
Disclosure of Invention
The invention provides a display brightness acquisition method, an automatic adjustment method and related equipment, which are used for overcoming the defects of unreliability in the display brightness acquisition process, cost increase caused by the fact that the brightness is acquired through a special sensor and the like in the prior art, and the effects of reliable performance and low cost can be achieved by acquiring the display brightness without depending on the sensor.
The invention provides a display brightness obtaining method, which comprises the following steps: acquiring the working time of a display; calculating the backlight lamp luminous flux based on the working time and backlight lamp aging data corresponding to the display; and calculating to obtain the brightness of the display according to the luminous flux of the backlight lamp.
According to the method for obtaining the brightness of the display provided by the invention, the backlight lamp luminous flux is obtained by calculation based on the working time and backlight lamp aging data corresponding to the display, and the method specifically comprises the following steps: acquiring the backlight lamp aging data which is a light flux data set measured by aging of the backlight lamp along with time; fitting based on the aging data to obtain a fitting relation between the luminous flux corresponding to the backlight and the aging time; and calculating the luminous flux of the backlight lamp based on the working time and by using the fitting relational expression.
According to the method for obtaining the brightness of the display provided by the invention, the backlight lamp luminous flux is obtained by calculation based on the working time and backlight lamp aging data corresponding to the display, and the method specifically comprises the following steps: calculating to obtain backlight lamp luminous flux corresponding to the working time by utilizing an interpolation algorithm based on the backlight lamp aging data pre-stored on the display; wherein the aging data is a light flux data set measured by aging of the backlight over time.
According to the method for obtaining the brightness of the display provided by the invention, the backlight is an LED backlight, and the fitting relation between the luminous flux corresponding to the backlight and the aging time is obtained based on the aging data by fitting, specifically comprising the following steps: calculating a corresponding parameter beta by using a luminous flux formula L (exp (-beta x t)) based on the luminous flux L and the aging time t in each luminous flux data set, and forming a parameter beta data set; calculating a parameter average value of the parameter beta data set; and obtaining the fitting relation based on the parameter average value.
According to the method for obtaining the brightness of the display, the obtaining of the fitting relation based on the parameter average value specifically includes: calculating to obtain a light flux predicted value by using the light flux formula based on the parameter average value and the aging time; judging whether an error between the predicted light flux value and the light flux in the light flux data set exceeds a preset threshold range; if the error between the predicted luminous flux value and the luminous flux in the luminous flux data set exceeds a preset threshold range, correcting the parameter average value to obtain a corrected parameter, and substituting the corrected parameter into the luminous flux formula to obtain the fitting relational expression; the step of correcting the parameter average value is to adjust the parameter average value until the positive and negative distribution of the error is balanced.
According to the method for obtaining the brightness of the display provided by the invention, after the corresponding parameter beta is obtained through calculation and a parameter beta data set is formed, the method further comprises the following steps: sequentially judging whether the parameter beta exceeds a preset parameter limit value; if the parameter β exceeds a predetermined parameter limit value, the parameter β exceeding the predetermined parameter limit value is removed from the parameter β data set.
The invention also provides a method for automatically adjusting the brightness of the display, which comprises the following steps: obtaining the current display brightness after the display is started up for a preset time; judging whether the brightness of the current display exceeds a preset brightness range or not, wherein the brightness range is a factory brightness interval of the display; if the current display brightness exceeds the preset brightness range, determining a current regulation proportion corresponding to the current display brightness according to the relation between the display brightness and the backlight current regulation proportion; adjusting a backlight according to the current adjustment ratio until the current display brightness is within the predetermined brightness range; the current display brightness is obtained by any one of the display brightness obtaining methods.
According to the method for automatically adjusting the brightness of the display provided by the invention, before determining the current adjustment proportion corresponding to the current brightness of the display according to the relation between the brightness of the display and the backlight current adjustment proportion, the method further comprises the following steps: the current flowing through the backlight is adjusted, and the corresponding brightness is measured, thereby obtaining a brightness data set composed of the current adjustment ratio and the corresponding brightness.
According to the method for automatically adjusting the brightness of the display provided by the invention, the current adjustment proportion corresponding to the current brightness of the display is determined according to the relation between the brightness of the display and the backlight current adjustment proportion, and the method specifically comprises the following steps: and calculating to obtain the current regulation proportion corresponding to the current display brightness by utilizing an interpolation algorithm based on the brightness data group.
The invention also provides a display brightness acquisition device, comprising: the time acquisition module is used for acquiring the working time of the display; the luminous flux calculation module is used for calculating the luminous flux of the backlight lamp based on the working time and backlight lamp aging data corresponding to the display; and the brightness calculation module is used for calculating the brightness of the display according to the luminous flux of the backlight lamp.
The invention also provides a display brightness automatic regulating device, comprising: the brightness acquisition module is used for acquiring the current display brightness after the display is started up for a preset time; the current regulation ratio determining module is used for judging whether the current display brightness exceeds a preset brightness range, wherein the brightness range is a factory brightness interval of the display; if the current display brightness exceeds the preset brightness range, determining a current regulation proportion corresponding to the current display brightness according to the relation between the display brightness and the backlight current regulation proportion; the brightness adjusting module is used for adjusting the backlight lamp according to the current adjusting proportion until the current display brightness is within the preset brightness range; wherein, the current display brightness is obtained by the display brightness obtaining device.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the steps of any one of the display brightness obtaining methods or the steps of any one of the display brightness automatic adjusting methods.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of any of the above-described display luminance obtaining methods or implements the steps of any of the above-described display luminance automatic adjustment methods.
The invention provides a display brightness obtaining method, an automatic adjusting method and related equipment, wherein the display brightness obtaining method obtains the working time of a display; further, calculating to obtain backlight lamp luminous flux based on the working time and backlight lamp aging data corresponding to the display; and finally, calculating to obtain the brightness of the display according to the backlight lamp luminous flux, so that the luminous flux corresponding to the working time can be obtained only by depending on backlight lamp aging data corresponding to the display, and further the luminous flux is converted into the brightness of the display, thereby improving the reliability of obtaining the brightness of the display and reducing the cost of the display.
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In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a display luminance obtaining method according to the present invention;
FIG. 2 is a graph comparing aging measurements and calculated predictions as provided by the present invention;
FIG. 3 is a comparison graph of the error corresponding to the new parameter average and the error corresponding to the corrected parameter provided by the present invention;
FIG. 4 is a first flowchart illustrating a method for automatically adjusting the brightness of a display according to the present invention;
FIG. 5 is a second flowchart illustrating a method for automatically adjusting the brightness of a display according to the present invention;
FIG. 6 is a schematic structural diagram of a display luminance obtaining apparatus provided in the present invention;
FIG. 7 is a schematic structural diagram of an automatic brightness adjusting device for a display according to the present invention;
fig. 8 is a schematic physical structure diagram of an electronic device provided in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
FIG. 1 is a schematic flow chart of a display luminance obtaining method according to the present invention; as shown in fig. 1, a display brightness obtaining method includes:
step S110, acquiring the working time of the display;
step S120, calculating the backlight lamp luminous flux based on the working time and the backlight lamp aging data corresponding to the display;
and step S130, calculating to obtain the brightness of the display according to the luminous flux of the backlight lamp.
Specifically, firstly, software on a display is utilized to obtain the working time of the display; then, backlight lamp aging data corresponding to the display is used for calculating and obtaining backlight lamp luminous flux corresponding to the working time, wherein the backlight lamp aging data corresponding to the display can be obtained from a manufacturer corresponding to the display, the aging data is a luminous flux data set measured by aging of the backlight lamp along with time, the relationship between the aging time and the luminous flux can be reflected, and the luminous flux corresponding to the working time can be determined by using the aging data; and finally, calculating to obtain the corresponding display brightness according to the conversion relation between the backlight luminous flux and the display brightness, wherein the conversion relation between the backlight luminous flux and the display brightness is substantially proportional under the condition of not considering dimensions.
The backlight may be of a CCFL type or an LED type, and is not limited herein.
The display brightness obtaining method provided by the invention obtains the working time of the display; further, calculating to obtain backlight lamp luminous flux based on the working time and backlight lamp aging data corresponding to the display; and finally, calculating to obtain the brightness of the display according to the backlight lamp luminous flux, so that the luminous flux corresponding to the working time can be obtained only by depending on backlight lamp aging data corresponding to the display, and further the luminous flux is converted into the brightness of the display, thereby improving the reliability of obtaining the brightness of the display and reducing the cost of the display.
In an implementation manner of this embodiment, the backlight light flux corresponding to the operating time may be calculated by using an interpolation algorithm with respect to the backlight aging data, or may be a fitting relation between the light flux and the aging time obtained in advance through the backlight aging data, and then the light flux corresponding to the operating time is calculated by using the fitting relation. The following description is directed to the above two modes, respectively.
First, calculating a backlight lamp luminous flux corresponding to an operating time for backlight aging data by using an interpolation algorithm, which includes:
and calculating the backlight lamp luminous flux corresponding to the working time by utilizing an interpolation algorithm based on the backlight lamp aging data pre-stored on the display.
Wherein the aging data is a light flux data set measured by aging of the backlight over time.
Specifically, backlight aging data in the display (in this embodiment, the backlight aging data is LED backlight aging data) is obtained from a manufacturer of the display, and then the backlight aging data is directly stored in the display. The aging data are shown in table 1, and the luminous flux in table 1 is normalized, and the luminous flux becomes smaller as the aging time increases.
TABLE 1 aging data
Further, the backlight luminous flux corresponding to the working time is calculated by utilizing an interpolation algorithm and based on the aging data.
Specifically, if the obtained working time of the display is 2000 hours, the luminous flux corresponding to 1920 hours closest to 2000 hours in table 1 is 95.10%, and the luminous flux corresponding to 2400 hours is 94.50%, and the simplest linear interpolation calculation is adopted in this embodiment, then the luminous flux at 2000 hours is 95.10% + (2000-1920) × (94.50% -95.10%)/(2400-1920) — 95.00%.
According to the display brightness obtaining method, the aging data stored on the display is calculated by utilizing the interpolation algorithm, so that the backlight luminous flux corresponding to the working time can be directly obtained without obtaining through a sensor, the reliability of obtaining the display brightness is improved, and the manufacturing cost of the display is saved.
The second method is that a fitting relation between the luminous flux and the aging time is obtained in advance through backlight aging data, and then the luminous flux corresponding to the working time is obtained through calculation by using the fitting relation, and comprises the following steps:
and acquiring the backlight lamp aging data which is a light flux data set measured by aging of the backlight lamp along with time.
And fitting based on the aging data to obtain a fitting relational expression of the light flux corresponding to the backlight lamp and the aging time.
And calculating the luminous flux of the backlight lamp based on the working time and by using the fitting relational expression.
Specifically, backlight aging data corresponding to the display is obtained from a display manufacturer, a fitting relation between the light flux corresponding to the backlight and the aging time is obtained through calculation by using the aging data, and finally the working time is substituted into the fitting relation to obtain the corresponding light flux through calculation.
According to the display brightness obtaining method provided by the invention, the fitting relational expression between the luminous flux corresponding to the backlight and the aging time is obtained through fitting based on the aging data, and then the luminous flux corresponding to the working time is obtained through calculation according to the fitting relational expression, so that the display brightness is not required to be obtained through a sensor, the reliability of obtaining the brightness is enhanced, and the cost is saved.
Further, in this embodiment, the backlight is an LED type backlight, and the corresponding fitting relation is specifically obtained as follows:
calculating a corresponding parameter beta by using a luminous flux formula L (exp (-beta x t)) based on the luminous flux L and the aging time t in each luminous flux data set, and forming a parameter beta data set;
calculating a parameter average value of the parameter beta data set;
and obtaining the fitting relation based on the parameter average value.
Specifically, based on the luminous flux formula L ═ exp (- β × t), and using each group of luminous flux L and the aging time t in the luminous flux data set, a parameter β corresponding to each group of luminous flux L and the aging time t is calculated, and all the parameters β constitute a parameter β data set. And calculating a parameter average value of the parameter beta data set, taking the parameter average value as a target parameter value, and substituting the target parameter value into the original luminous flux formula to form a fitting relational expression.
In this embodiment, the corresponding parameter β is calculated based on the aging data in table 1, and specifically, as shown in table 2, the average value of the parameter β is 1.82666E-05.
TABLE 2 parameter beta modified Process data
According to the display brightness obtaining method provided by the invention, the parameter beta corresponding to each group of luminous flux L and the aging time t in the aging data is sequentially calculated, then the mean value of all the parameter beta is obtained, and then the fitting relation is obtained, so that the fitting relation is more accurate, the relation between the aging time and the luminous flux can be more accurately described, and the calculated luminous flux corresponding to the working time is more accurate.
Further, obtaining the fitting relation based on the parameter average value specifically includes:
calculating to obtain a light flux predicted value by using the light flux formula based on the parameter average value and the aging time;
judging whether an error between the predicted light flux value and the light flux in the light flux data set exceeds a preset threshold range;
if the error between the predicted luminous flux value and the luminous flux in the luminous flux data set exceeds a preset threshold range, correcting the parameter average value to obtain a corrected parameter, and substituting the corrected parameter into the luminous flux formula to obtain the fitting relational expression;
the step of correcting the parameter average value is to adjust the parameter average value until the positive and negative distribution of the error is balanced.
Specifically, after obtaining the average value of the parameter, the average value of the parameter is substituted into the luminous flux formula L ═ exp (- β × t), so that it becomes a new luminous flux formula, and the predicted luminous flux values are calculated one by one based on the aging time, taking the aging data in table 1 as an example, the predicted luminous flux values in table 3 are calculated, and the predicted luminous flux values in table 3 are compared with the aging measured values, and the difference between the two values is shown in fig. 2; further, judging whether the error between the predicted light flux value and the aging data exceeds a preset threshold range; if the average value of the parameters exceeds the preset value, the average value of the parameters needs to be corrected, and a fitting relation is obtained based on the corrected parameters; if not, directly using the new luminous flux formula as a fitting relation.
TABLE 3 aging measurement and prediction data sheet
The threshold range corresponding to the error and the display type are set, for example: the recommended brightness error of the medical image diagnosis level display is 10%, and the recommended brightness error of the browsing level display is 15%. The brightness error ranges corresponding to different displays are different, and specific and actual conditions are set, which is not limited herein. In this embodiment, the threshold range corresponding to the error is set to 5%. Taking table 3 as an example, the errors between the predicted values of luminous flux in table 3 and the luminous flux in the luminous flux data set do not exceed 5%, so the fitting relation is L ═ exp (-1.91562E-05 × t).
And if the error between the predicted light flux value and the light flux in the light flux data group is found to exceed 5%, correcting the parameter average value 1.91562E-05 by a specific correction method of adjusting the parameter average value until the positive and negative distribution of the error is balanced. Namely, the maximum positive and negative errors are distributed more evenly above and below 0. Taking the data in table 4 as an example, 0.0000008 is added to the average value of the parameters to obtain a corrected parameter 1.99562E-05, and based on this, the predicted value and error corresponding to the corrected parameter shown in table 4 are calculated. As can be seen from table 4, the absolute values of the errors between the prediction and measurement for the corrected parameters were all less than 5%.
TABLE 4 predicted values and errors corresponding to the corrected parameters
According to the display brightness obtaining method provided by the invention, the luminous flux predicted value is obtained through parameter average value calculation, whether the error between the luminous flux predicted value and the aging data exceeds a preset threshold range or not is judged, if the error exceeds the preset threshold range, the parameter average value needs to be corrected, the fitting relational expression is further obtained based on the corrected parameters, if the error does not exceed the preset threshold range, the fitting relational expression is further obtained based on the parameter average value, and the relation between the luminous flux and the aging time can be more accurately described by the fitting relational expression, so that the luminous flux corresponding to the working time obtained through calculation is more accurate, and the display brightness obtained through conversion is more accurate.
In another embodiment provided by the present invention, after the calculating to obtain the corresponding parameter β and forming the parameter β data set, the method further includes:
sequentially judging whether the parameter beta exceeds a preset parameter limit value;
if the parameter beta exceeds a preset parameter limit value, the parameter beta exceeding the preset parameter limit value is removed from the parameter beta data set;
if the parameter β does not exceed a predetermined parameter limit value, the parameter average is calculated directly.
Specifically, whether each parameter beta exceeds a preset parameter limit value is judged, if yes, the deviation of the parameter beta exceeding the parameter limit value is considered to be large, and the parameter beta is removed from a parameter beta data set; then, the predicted value of the light flux after beta removal and the corresponding error are recalculated based on the new parameter average value 1.91562E-05, and the specific calculation result is shown in Table 5. As can be seen from Table 5, the absolute values of the errors in prediction and measurement after elimination of β were all less than 5%.
Fig. 3 is a comparison graph of the error corresponding to the new parameter average value and the error corresponding to the corrected parameter, as shown in fig. 3, the error corresponding to the new parameter average value in table 5 and the error corresponding to the corrected parameter are compared, and the difference between the two is shown in fig. 3. And the error corresponding to the corrected parameter is more balanced than the error corresponding to the new parameter average value.
TABLE 5 data comparison after beta culling
In this embodiment, the setting method of the parameter limit value is as follows: . + -. 50% of the mean values of the parameters, the parameter limits corresponding to the mean value 1.82666E-05 are at most 2.73999E-05 and at least 0.91333E-05. Analyzing each parameter beta in Table 5, it was found that the parameter beta was-3.92E-05, which is much less than the minimum parameter limit value 0.91333E-05, at an aging time of 480; when the aging time is 960, the parameter beta is 3.93E-05 which is far larger than the maximum value 2.73999E-05 of the parameter limit value, therefore, the two parameters beta are removed, and the average value of the parameter beta data group after removal is obtained, so as to obtain a new parameter average value 1.91562E-05.
According to the display brightness obtaining method provided by the invention, whether each parameter beta in the parameter beta data set exceeds the preset parameter limit value is judged, if the parameter beta exceeds the preset parameter limit value, the corresponding parameter beta is removed, and the average value of the rest parameter beta is further calculated, so that the calculated parameter average value is more accurate.
FIG. 4 is a first flowchart illustrating a method for automatically adjusting the brightness of a display according to the present invention; as shown in fig. 4, a method for automatically adjusting the brightness of a display includes:
step S210, obtaining the brightness of the current display after the display is started up for a preset time;
step S220, judging whether the brightness of the current display exceeds a preset brightness range, wherein the brightness range is a factory brightness interval of the display;
if the current display brightness exceeds the preset brightness range, determining a current regulation proportion corresponding to the current display brightness according to the relation between the display brightness and the backlight current regulation proportion;
and step S230, adjusting the backlight lamp according to the current adjusting ratio until the current display brightness is within the preset brightness range.
Specifically, after the display is started up for a preset time, the current display brightness is obtained by using any one of the display brightness obtaining methods; further judging whether the current display brightness exceeds a preset brightness range, if so, determining a current regulation proportion corresponding to the current display brightness according to the relation between the display brightness and a backlight current regulation proportion, and regulating based on the current regulation proportion until the current display brightness is within the preset brightness range; if not, there is no need to adjust the display brightness.
The preset time is 20 minutes in this embodiment, and in other embodiments, the preset time may vary with actual conditions, which is not limited herein.
In this embodiment, the factory luminance range of the display is 400 + -10 cd/m2I.e. 390cd/m2-410cd/m2. If the current display brightness is less than 390 or greater than 410, the current display brightness needs to be adjusted.
The method for automatically adjusting the brightness of the display comprises the steps of obtaining the brightness of the current display, judging whether the brightness of the current display exceeds a preset brightness range, if so, determining a current adjustment proportion corresponding to the brightness of the current display according to the relation between the brightness of the display and a backlight current adjustment proportion, and adjusting based on the current adjustment proportion until the brightness of the current display is within the preset brightness range; if not, no adjustment is required. Therefore, the current display brightness can be obtained without depending on a sensor, and automatic adjustment is carried out in real time based on the current display brightness, so that the brightness of the display can be always maintained within a preset brightness range, and specific requirements of constant brightness, such as medical image display, can be met. Not only make the cost reduction of display, can also promote the reliability that display luminance acquireed, simultaneously, can complete luminance automatically regulated, protection user's eyesight.
Before determining the current adjustment proportion corresponding to the current display brightness according to the relationship between the display brightness and the backlight current adjustment proportion, the method further comprises the following steps:
the current flowing through the backlight is adjusted, and the corresponding brightness is measured, thereby obtaining a brightness data set composed of the current adjustment ratio and the corresponding brightness.
The brightness data set is shown in table 6, and the adjustment ratio in table 6 is from 0% to 100%, and accordingly, the brightness changes.
TABLE 6 luminance data set
Further, the determining a current adjustment ratio corresponding to the current display brightness according to a relationship between the display brightness and a backlight current adjustment ratio specifically includes:
and calculating to obtain the current regulation proportion corresponding to the current display brightness by utilizing an interpolation algorithm based on the brightness data group.
In this embodiment, a current adjustment ratio corresponding to the current display luminance is calculated by using an interpolation algorithm and the luminance data set of table 6, and then current adjustment is performed according to the current adjustment ratio, so that the current display luminance is within the predetermined luminance range. For example, the obtained display luminance is 400cd/m2Then, the corresponding current adjustment ratio was calculated to be 29% by the interpolation algorithm and the luminance data set of table 6. It can be seen that the data in Table 6 only describes the current regulation ratio (378.987 cd/m) for a specific luminance2Corresponding to 27.27%, 411.319cd/m2Corresponding to 30.30%), while in practical applications the actual brightness value is not necessarily the specific brightness value recorded in table 6, so that the current adjustment ratio corresponding to the actual brightness value needs to be obtained by an interpolation algorithm.
According to the automatic brightness adjusting method for the display, the current adjusting proportion corresponding to the current display brightness is obtained through calculation by utilizing an interpolation algorithm according to the brightness data set consisting of the current adjusting proportion and the corresponding brightness, and then the brightness is adjusted according to the current adjusting proportion. Therefore, the current adjustment is more accurate, and the backlight lamp is suitable for backlight lamps with different current.
FIG. 5 is a second flowchart illustrating a method for automatically adjusting the brightness of a display according to the present invention; as shown in fig. 5, an automatic brightness adjustment method for a display includes:
step S310, acquiring aging data of a backlight lamp of a display from a display manufacturer;
step S320, calculating the aging data by using a luminous flux formula L ═ exp (- β × t) to obtain a parameter β data set in the formula, and calculating a parameter average value;
step S330, substituting the parameter average value into a light flux formula, and solving a light flux prediction value data set of the relation between the backlight and the aging time;
step S340, comparing the light flux prediction value data set with the aging data, and correcting the parameter average value if the error exceeds a preset range;
step S350, adjusting the current supplied to the backlight lamp, measuring the brightness of the display, and obtaining a brightness data set consisting of the current adjustment proportion of the backlight lamp and the brightness of the display;
step S360, calibrating the factory brightness of the display, and recording the current regulation proportion corresponding to the factory brightness;
step S370, recording the working time of the display in the display software;
and step S380, after the display is started for 20 minutes each time, namely the luminous flux is stable, calculating the current display brightness by using a fitting relational expression, and if the current display brightness exceeds a preset range, adjusting the current supplied to the backlight lamp according to the relation between the display brightness and the current adjustment proportion of the backlight lamp, so that the current display brightness reaches the preset range.
In another aspect, the present invention further provides a display brightness acquiring apparatus, which is described below, and the display brightness acquiring apparatus described below and the display brightness acquiring method described above may be referred to in correspondence with each other. Fig. 6 is a schematic structural diagram of a display luminance obtaining apparatus provided in the present invention.
As shown in fig. 6, the display luminance obtaining apparatus includes:
the time obtaining module 510 is configured to obtain an operating time of the display.
And a light flux calculating module 520, configured to calculate a backlight light flux based on the working time and backlight aging data corresponding to the display.
And a brightness calculating module 530, configured to calculate, according to the backlight luminous flux, display brightness.
Specifically, the time acquiring module 510 is configured to acquire the operating time of the display by using software in the display.
And a light flux calculating module 520, configured to calculate a backlight light flux according to the backlight aging data of the display. The backlight aging data is a light flux data set measured by aging of the backlight over time, the aging data can reflect the relation between the light flux and the aging time, and the light flux corresponding to the working time can be determined based on the aging data.
In an implementation manner of this embodiment, the backlight light flux corresponding to the operating time may be calculated by using an interpolation algorithm with respect to the backlight aging data, or may be a fitting relation between the light flux and the aging time obtained in advance through the backlight aging data, and then the light flux corresponding to the operating time is calculated by using the fitting relation. The following description is directed to the above two modes, respectively.
First, calculating a backlight lamp luminous flux corresponding to an operating time for backlight aging data by using an interpolation algorithm, which includes:
and calculating the backlight lamp luminous flux corresponding to the working time by utilizing an interpolation algorithm based on the backlight lamp aging data pre-stored on the display.
Wherein the aging data is a light flux data set measured by aging of the backlight over time.
Specifically, backlight aging data in the display is obtained from the manufacturer of the display and then stored directly in the display.
Obtaining a fitting relation between the luminous flux and the aging time in advance through the backlight aging data, and further calculating the luminous flux corresponding to the working time by using the fitting relation, wherein the fitting relation comprises the following steps:
and acquiring the backlight lamp aging data which is a light flux data set measured by aging of the backlight lamp along with time.
And fitting based on the aging data to obtain a fitting relational expression of the light flux corresponding to the backlight lamp and the aging time.
And calculating the luminous flux of the backlight lamp based on the working time and by using the fitting relational expression.
Specifically, backlight aging data corresponding to the display is obtained from a display manufacturer, a fitting relation between the light flux corresponding to the backlight and the aging time is obtained through calculation by using the aging data, and finally the working time is substituted into the fitting relation to obtain the corresponding light flux through calculation.
And a brightness calculating module 530 for converting the backlight light flux into the display brightness.
The display brightness acquiring device provided by the invention acquires the working time of the display through the time acquiring module 510; further, the light flux calculating module 520 calculates the light flux of the backlight lamp based on the working time and the backlight lamp aging data corresponding to the display; finally, the brightness calculation module 530 calculates the brightness of the display according to the backlight lamp light flux, so that the light flux corresponding to the working time can be obtained only by depending on the backlight lamp aging data corresponding to the display, and further the light flux is converted into the brightness of the display, thereby improving the reliability of obtaining the brightness of the display and reducing the cost of the display.
In another aspect, the present invention further provides an automatic display brightness adjusting apparatus, which is described below, and the automatic display brightness adjusting apparatus described below and the automatic display brightness adjusting method described above may be referred to in correspondence with each other. Fig. 7 is a schematic structural diagram of an automatic brightness adjusting device for a display provided by the present invention.
As shown in fig. 7, the automatic brightness adjusting apparatus for a display includes:
the brightness obtaining module 610 is configured to obtain the current brightness of the display after the display is turned on for a predetermined time.
A current regulation ratio determining module 620, configured to determine whether the current display brightness exceeds a predetermined brightness range, where the brightness range is a factory brightness interval of the display;
and if the current display brightness exceeds the preset brightness range, determining the current regulation proportion corresponding to the current display brightness according to the relation between the display brightness and the backlight current regulation proportion.
And a brightness adjusting module 630, configured to adjust the backlight according to the current adjusting ratio until the current display brightness is within the predetermined brightness range.
And the current display brightness is obtained by the display brightness obtaining device.
Specifically, the brightness obtaining module 610 is configured to obtain the display brightness through the display brightness obtaining apparatus.
A current adjustment ratio determining module 620, configured to determine whether the current display brightness exceeds a predetermined brightness, if so, determine a current adjustment ratio corresponding to the current display brightness according to a relationship between the display brightness and the backlight current adjustment ratio, and if not, do not need the subsequent brightness adjusting module 630 to adjust the display brightness.
Before determining the current adjustment proportion corresponding to the current display brightness according to the relationship between the display brightness and the backlight current adjustment proportion, the method further comprises the following steps:
the current flowing through the backlight is adjusted, and the corresponding brightness is measured, thereby obtaining a brightness data set composed of the current adjustment ratio and the corresponding brightness.
Further, the determining a current adjustment ratio corresponding to the current display brightness according to a relationship between the display brightness and a backlight current adjustment ratio specifically includes:
and calculating to obtain the current regulation proportion corresponding to the current display brightness by utilizing an interpolation algorithm based on the brightness data group.
And a brightness adjusting module 630, configured to adjust the current display brightness based on the current adjustment ratio after the current adjustment ratio determining module 620 determines the current adjustment ratio until a predetermined brightness range is reached.
The display brightness automatic regulating device provided by the invention obtains the current display brightness through the brightness obtaining module 610, judges whether the current display brightness exceeds the preset brightness range through the current regulation ratio determining module 620, and determines the current regulation ratio corresponding to the current display brightness according to the relation between the display brightness and the backlight current regulation ratio if the current display brightness exceeds the preset brightness range; finally, the current adjustment ratio is adjusted by the brightness adjustment module 630 until the current display brightness is within the predetermined brightness range; if not, no adjustment is required. Therefore, the current display brightness can be obtained without depending on a sensor, and automatic adjustment is carried out in real time based on the current display brightness, so that the brightness of the display can be always maintained within a preset brightness range, and specific requirements of constant brightness, such as medical image display, can be met. Not only make the cost reduction of display, can also promote the reliability that display luminance acquireed, simultaneously, can complete luminance automatically regulated, protection user's eyesight.
Fig. 8 is a schematic physical structure diagram of an electronic device provided in the present invention, and as shown in fig. 8, the electronic device may include: a processor (processor)710, a communication Interface (Communications Interface)720, a memory (memory)730, and a communication bus 740, wherein the processor 710, the communication Interface 720, and the memory 730 communicate with each other via the communication bus 740. Processor 710 may invoke logic instructions in memory 730 to perform a display brightness acquisition method comprising: acquiring the working time of a display; calculating the backlight lamp luminous flux based on the working time and backlight lamp aging data corresponding to the display; and calculating to obtain the brightness of the display according to the luminous flux of the backlight lamp. Or to perform a method for automatic brightness adjustment of a display, the method comprising: obtaining the current display brightness after the display is started up for a preset time; judging whether the brightness of the current display exceeds a preset brightness range or not, wherein the brightness range is a factory brightness interval of the display; if the current display brightness exceeds the preset brightness range, determining a current regulation proportion corresponding to the current display brightness according to the relation between the display brightness and the backlight current regulation proportion; adjusting a backlight according to the current adjustment ratio until the current display brightness is within the predetermined brightness range; wherein the current display brightness is obtained by the display brightness obtaining method according to any one of the above methods.
In addition, the logic instructions in the memory 730 can be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In yet another aspect, the present invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program, which when executed by a processor, implements a display luminance obtaining method provided by performing the above methods, the method including: acquiring the working time of a display; calculating the backlight lamp luminous flux based on the working time and backlight lamp aging data corresponding to the display; and calculating to obtain the brightness of the display according to the luminous flux of the backlight lamp. Or to perform a method for automatic brightness adjustment of a display, the method comprising: obtaining the current display brightness after the display is started up for a preset time; judging whether the brightness of the current display exceeds a preset brightness range or not, wherein the brightness range is a factory brightness interval of the display; if the current display brightness exceeds the preset brightness range, determining a current regulation proportion corresponding to the current display brightness according to the relation between the display brightness and the backlight current regulation proportion; adjusting a backlight according to the current adjustment ratio until the current display brightness is within the predetermined brightness range; wherein the current display brightness is obtained by the display brightness obtaining method according to any one of the above methods.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (13)
1. A display luminance acquisition method, comprising:
acquiring the working time of a display;
calculating the backlight lamp luminous flux based on the working time and backlight lamp aging data corresponding to the display;
and calculating to obtain the brightness of the display according to the luminous flux of the backlight lamp.
2. The method for obtaining the brightness of the display according to claim 1, wherein the calculating the backlight light flux based on the operating time and the backlight aging data corresponding to the display specifically includes:
acquiring the backlight lamp aging data which is a light flux data set measured by aging of the backlight lamp along with time;
fitting based on the aging data to obtain a fitting relation between the luminous flux corresponding to the backlight and the aging time;
and calculating the luminous flux of the backlight lamp based on the working time and by using the fitting relational expression.
3. The method for obtaining the brightness of the display according to claim 1, wherein the calculating the backlight light flux based on the operating time and the backlight aging data corresponding to the display specifically includes:
calculating to obtain backlight lamp luminous flux corresponding to the working time by utilizing an interpolation algorithm based on the backlight lamp aging data pre-stored on the display;
wherein the aging data is a light flux data set measured by aging of the backlight over time.
4. The method for obtaining the brightness of the display according to claim 2, wherein the backlight is an LED backlight, and the fitting of the light flux corresponding to the backlight and the aging time based on the aging data includes:
calculating a corresponding parameter beta by using a luminous flux formula L (exp (-beta x t)) based on the luminous flux L and the aging time t in each luminous flux data set, and forming a parameter beta data set;
calculating a parameter average value of the parameter beta data set;
and obtaining the fitting relation based on the parameter average value.
5. The method for obtaining the brightness of the display according to claim 4, wherein the obtaining the fitting relation based on the parameter average value specifically includes:
calculating to obtain a light flux predicted value by using the light flux formula based on the parameter average value and the aging time;
judging whether an error between the predicted light flux value and the light flux in the light flux data set exceeds a preset threshold range;
if the error between the predicted luminous flux value and the luminous flux in the luminous flux data set exceeds a preset threshold range, correcting the parameter average value to obtain a corrected parameter, and substituting the corrected parameter into the luminous flux formula to obtain the fitting relational expression;
the step of correcting the parameter average value is to adjust the parameter average value until the positive and negative distribution of the error is balanced.
6. The method for obtaining the brightness of the display according to claim 4, wherein after the calculating to obtain the corresponding parameter β and forming the parameter β data set, the method further comprises:
sequentially judging whether the parameter beta exceeds a preset parameter limit value;
if the parameter β exceeds a predetermined parameter limit value, the parameter β exceeding the predetermined parameter limit value is removed from the parameter β data set.
7. An automatic brightness adjustment method for a display, comprising:
obtaining the current display brightness after the display is started up for a preset time;
judging whether the brightness of the current display exceeds a preset brightness range or not, wherein the brightness range is a factory brightness interval of the display;
if the current display brightness exceeds the preset brightness range, determining a current regulation proportion corresponding to the current display brightness according to the relation between the display brightness and the backlight current regulation proportion;
adjusting a backlight according to the current adjustment ratio until the current display brightness is within the predetermined brightness range;
wherein the current display luminance is obtained by the display luminance obtaining method according to any one of claims 1 to 6.
8. The method of claim 7, wherein before determining the current adjustment ratio corresponding to the current display brightness according to the relationship between the display brightness and the backlight current adjustment ratio, further comprising:
the current flowing through the backlight is adjusted, and the corresponding brightness is measured, thereby obtaining a brightness data set composed of the current adjustment ratio and the corresponding brightness.
9. The method according to claim 8, wherein the determining a current adjustment ratio corresponding to the current display brightness according to a relationship between the display brightness and a backlight current adjustment ratio specifically comprises:
and calculating to obtain the current regulation proportion corresponding to the current display brightness by utilizing an interpolation algorithm based on the brightness data group.
10. A display luminance obtaining apparatus, comprising:
the time acquisition module is used for acquiring the working time of the display;
the luminous flux calculation module is used for calculating the luminous flux of the backlight lamp based on the working time and backlight lamp aging data corresponding to the display;
and the brightness calculation module is used for calculating the brightness of the display according to the luminous flux of the backlight lamp.
11. An automatic brightness adjusting device for a display, comprising:
the brightness acquisition module is used for acquiring the current display brightness after the display is started up for a preset time;
the current regulation ratio determining module is used for judging whether the current display brightness exceeds a preset brightness range, wherein the brightness range is a factory brightness interval of the display;
if the current display brightness exceeds the preset brightness range, determining a current regulation proportion corresponding to the current display brightness according to the relation between the display brightness and the backlight current regulation proportion;
the brightness adjusting module is used for adjusting the backlight lamp according to the current adjusting proportion until the current display brightness is within the preset brightness range;
wherein the current display luminance is obtained by the display luminance obtaining apparatus as claimed in claim 10.
12. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the method for obtaining display brightness according to any one of claims 1 to 6 or the steps of the method for automatically adjusting display brightness according to claims 7 to 9 when executing the program.
13. A non-transitory computer readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, implements the steps of the display brightness acquisition method according to any one of claims 1 to 6, or implements the steps of the display brightness automatic adjustment method according to claims 7 to 9.
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