CN113851089B - Display brightness control method and device, intelligent terminal and storage medium - Google Patents
Display brightness control method and device, intelligent terminal and storage medium Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/3413—Details of control of colour illumination sources
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
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- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The invention discloses a display brightness control method, a display brightness control device, an intelligent terminal and a storage medium, wherein the display brightness control method comprises the following steps: acquiring a brightness data set of a current frame of target equipment; acquiring the total brightness of the current frame based on all brightness data in the brightness data set of the current frame; acquiring a total brightness threshold of the target device, wherein the total brightness threshold corresponds to a power threshold of the target device; and controlling the display brightness of the current frame of the target equipment based on the brightness sum of the current frame and the total brightness threshold value. Compared with the prior art, the display brightness of the target equipment is dynamically controlled based on the actual brightness sum of the current frame of the target equipment and the total brightness threshold value of the target equipment in the scheme of the invention, the display brightness of the current frame of the target equipment can be dynamically controlled according to the actual brightness of the picture, the power (namely the power threshold value) of the target equipment is favorably and effectively utilized, and the picture display effect is favorably improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display brightness control method and apparatus, an intelligent terminal, and a storage medium.
Background
With the development of science and technology, people have higher and higher requirements on the display effect of display equipment, and how to enable the display equipment to output better image quality becomes a focus of attention. Better picture quality requires that the display device be brightest in bright scenes and darker for dark pictures. In the actual use process, the power of the display device is limited, and if the picture is too bright, the actual power of the display device may be larger than the limited power, so that the display device is burnt out.
In the prior art, a fixed limiting coefficient is usually preset, and the size of all luminance data for controlling the display luminance of the display device is always limited by the limiting coefficient, so that the display device is prevented from burning out. The prior art has problems in that the size of all luminance data is always limited by a fixed limiting coefficient, power of the display device is not effectively utilized, and picture display effect is greatly affected.
Thus, there is still a need for improvement and development of the prior art.
Disclosure of Invention
The invention mainly aims to provide a display brightness control method, a display brightness control device, an intelligent terminal and a storage medium, and aims to solve the problems that the size of all brightness data is limited by a fixed limiting coefficient all the time, the power of display equipment is not favorably and effectively utilized, and the picture display effect is greatly influenced in the prior art.
In order to achieve the above object, a first aspect of the present invention provides a display luminance control method, wherein the method includes:
acquiring a brightness data set of a current frame of target equipment;
acquiring the brightness sum of the current frame based on all the brightness data in the brightness data set of the current frame;
acquiring a total brightness threshold of the target device, wherein the total brightness threshold corresponds to a power threshold of the target device;
and controlling the display brightness of the current frame of the target equipment based on the brightness sum of the current frame and the total brightness threshold value.
Optionally, the luminance data set of the current frame includes a plurality of luminance data corresponding to the current frame of the target device, and each of the luminance data corresponds to one backlight partition of the target device.
Optionally, the obtaining the luminance sum of the current frame based on all the luminance data in the luminance data set of the current frame includes:
and calculating the sum of all the brightness data in the brightness data set of the current frame to be used as the brightness sum of the current frame.
Optionally, the obtaining a total brightness threshold of the target device, where the total brightness threshold corresponds to a power threshold of the target device, includes:
acquiring a power peak value of the target equipment based on the total number of the backlight partitions of the target equipment and the maximum power value of the backlight partitions;
and calculating and acquiring a total brightness threshold of the target device based on the ideal peak value of the brightness data, the total number of the backlight partitions, the power peak value of the target device and the power threshold of the target device, wherein the ideal peak value of the brightness data is a maximum value corresponding to a value range of the brightness data.
Optionally, the controlling the display brightness of the current frame of the target device based on the sum of the brightness of the current frame and the total brightness threshold includes:
when the sum of the brightness of the current frame is not greater than the total brightness threshold, respectively using each brightness data as target brightness data;
when the sum of the brightness of the current frame is larger than the total brightness threshold value, acquiring a brightness control coefficient, and acquiring each target brightness data based on the brightness control coefficient and each brightness data;
and controlling the display brightness corresponding to each backlight partition of the current frame of the target equipment based on each target brightness data.
Optionally, the obtaining a brightness control coefficient when the sum of the brightness of the current frame is greater than the total brightness threshold, and obtaining each target brightness data based on the brightness control coefficient and each of the brightness data includes:
when the brightness sum of the current frame is larger than the total brightness threshold value, dividing the brightness sum of the current frame by the total brightness threshold value to be used as a brightness control coefficient;
and dividing each brightness data by the brightness control coefficient to obtain each target brightness data.
Optionally, before the controlling the display brightness corresponding to each backlight partition of the current frame of the target device based on each target brightness data, the method further includes:
acquiring the sum of the target brightness data as the current frame backlight brightness value;
acquiring a backlight brightness value of a previous frame;
when the backlight brightness difference is greater than a preset difference threshold, respectively adjusting the value of each target brightness data based on the backlight brightness difference, a preset change ratio value and the current frame backlight brightness value, wherein the backlight brightness difference is a difference between the current frame backlight brightness value and the previous frame backlight brightness value.
A second aspect of the present invention provides a display luminance control apparatus, wherein the apparatus comprises:
the brightness data acquisition module is used for acquiring a brightness data set of a current frame of the target equipment;
a brightness sum obtaining module, configured to obtain a brightness sum of the current frame based on all brightness data in the brightness data set of the current frame;
a total brightness threshold obtaining module, configured to obtain a total brightness threshold of the target device, where the total brightness threshold corresponds to a power threshold of the target device;
and the control module is used for controlling the display brightness of the current frame of the target equipment based on the brightness sum of the current frame and the total brightness threshold value.
A third aspect of the present invention provides an intelligent terminal, where the intelligent terminal includes a memory, a processor, and a display brightness control program stored in the memory and executable on the processor, and the display brightness control program implements any one of the steps of the display brightness control method when executed by the processor.
A fourth aspect of the present invention provides a computer-readable storage medium having a display brightness control program stored thereon, wherein the display brightness control program, when executed by a processor, implements any one of the steps of the display brightness control method.
As can be seen from the above, in the scheme of the present invention, a luminance data set of a current frame of a target device is obtained; acquiring the brightness sum of the current frame based on all the brightness data in the brightness data set of the current frame; acquiring a total brightness threshold of the target device, wherein the total brightness threshold corresponds to a power threshold of the target device; and controlling the display brightness of the current frame of the target equipment based on the brightness sum of the current frame and the total brightness threshold value. Compared with the scheme that the size of all the brightness data is limited through a fixed limiting coefficient all the time in the prior art, the display brightness of the target device is dynamically controlled based on the actual brightness sum of the current frame of the target device and the total brightness threshold value of the target device in the scheme of the invention, the display brightness of the current frame of the target device can be dynamically controlled according to the actual brightness of the picture, the power (namely the power threshold value) of the target device is favorably and effectively utilized, and the picture display effect is favorably improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a flowchart illustrating a method for controlling display brightness according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating the step S300 in FIG. 1 according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a detailed process of step S400 in FIG. 1 according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating the step S402 in FIG. 3 according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a display brightness control apparatus according to an embodiment of the present invention;
fig. 6 is a schematic block diagram of an internal structure of an intelligent terminal according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when …" or "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
With the development of science and technology, people have higher and higher requirements on the display effect of display equipment such as smart televisions, and how to enable the display equipment to output better image quality becomes a focus of attention. Specifically, with the development of the smart television technology and the increase of application scenes, the smart television is ubiquitous and becomes an important window for people to know the outside world, study and the like, and the market also puts higher requirements on applications in different scenes, such as better image quality, for television manufacturers. Better picture quality requires that the display device be brightest in bright scenes and darker in dark pictures. In practice, the matrix backlight tv picture is very bright and consumes much more power, for example, it may be higher than 1000W in a full white picture, however, in the course of user usage, the full white picture is not common, so the actual power may not reach the maximum value in most cases. In practice, a low power (e.g. 400W) power supply is usually used for the tv set because of the high cost of the high power supply. In the actual use process, the power of the display device is limited, and if the picture is too bright, the actual power of the display device may be larger than the limited power, which may cause the display device to burn out.
In the prior art, a fixed limiting coefficient is usually preset, and the size of all luminance data for controlling the display luminance of the display device is always limited by the limiting coefficient, so that the display device is prevented from burning out. For example, the brightness data corresponding to each partition of the smart television is multiplied by a fixed limiting coefficient, so that the power supply is protected. The prior art has problems in that the size of all luminance data is always limited by a fixed limiting coefficient, power of the display device is not effectively utilized, and picture display effect is greatly affected. For example, when a certain television screen is a 20% white window (the middle 20% is full white, and the other is full black), even if the corresponding actual operating power in this case cannot reach the limited power (e.g. 400W) of the television, the 20% white window is multiplied by the limiting coefficient, so that the full white area in the window cannot reach the maximum brightness, the brightness in other areas is correspondingly dimmed, the power of the television cannot be effectively utilized, and the display effect of the screen is greatly influenced.
In order to solve the problems in the prior art, in the scheme of the invention, a brightness data set of a current frame of target equipment is obtained; acquiring the brightness sum of the current frame based on all the brightness data in the brightness data set of the current frame; acquiring a total brightness threshold of the target device, wherein the total brightness threshold corresponds to a power threshold of the target device; and controlling the display brightness of the current frame of the target equipment based on the brightness sum of the current frame and the total brightness threshold value. Compared with the scheme that the size of all the brightness data is limited through a fixed limiting coefficient all the time in the prior art, the display brightness of the target device is dynamically controlled based on the actual brightness sum of the current frame of the target device and the total brightness threshold value of the target device in the scheme of the invention, the display brightness of the current frame of the target device can be dynamically controlled according to the actual brightness of the picture, the power (namely the power threshold value) of the target device is favorably and effectively utilized, and the picture display effect is favorably improved.
Exemplary method
As shown in fig. 1, an embodiment of the present invention provides a method for controlling display brightness, specifically, the method includes the following steps:
step S100, acquiring a brightness data set of a current frame of the target device.
The target device is a display device that needs to perform display brightness control, such as a display, a television, and the like. In this embodiment, the target device is specifically a matrix backlight television, so that the display performance of matrix backlight display is improved according to the method of the present invention, and the user experience is improved.
Step S200, obtaining the brightness sum of the current frame based on all the brightness data in the brightness data set of the current frame.
The luminance data set of the current frame is a set of luminance data corresponding to a picture to be displayed by the matrix backlight television at the current frame. Specifically, the matrix backlight television controls the display brightness of each backlight partition through each brightness data. Therefore, the sum of the brightness of the current frame is obtained based on all the brightness data in the brightness data set of the current frame, and the sum of the brightness of the current frame is related to the current (or power) consumed by the sum of the brightness of the current frame and the brightness data corresponding to the picture of the current frame.
Step S300, obtaining a total brightness threshold of the target device, where the total brightness threshold corresponds to a power threshold of the target device.
The power threshold of the target device is a preset maximum power that the matrix backlight television can bear when working normally. In this embodiment, the power threshold is set as a rated power of the power supply of the target device, and during an actual use process, the power threshold may be adjusted according to an actual requirement, which is not specifically limited herein. The total brightness threshold is the sum of the brightness data corresponding to all backlight partitions when the working power of the target device reaches the power threshold. For example, if the brightness of all backlight partitions is the same when the operating power of the target device reaches the power threshold (the brightness corresponding to all backlight partitions of the frame is the same), the total brightness threshold is the product of the brightness data corresponding to the backlight partition and the number of backlight partitions in this case.
Step S400, controlling the display brightness of the current frame of the target device based on the brightness sum of the current frame and the total brightness threshold.
Specifically, the display brightness of each backlight partition of the current frame of the target device is controlled based on the sum of the brightness of the current frame and the total brightness threshold, so that the sum of the power consumed by all the actual backlight partitions of the target device is not greater than the power threshold of the target device. Therefore, the actual brightness of the target equipment is dynamically adjusted, the power of the target equipment is effectively utilized, and the target equipment is protected from being burnt out due to overlarge power.
As can be seen from the above, in the display brightness control method provided in the embodiment of the present invention, a brightness data set of a current frame of a target device is obtained; acquiring the brightness sum of the current frame based on all the brightness data in the brightness data set of the current frame; acquiring a total brightness threshold of the target device, wherein the total brightness threshold corresponds to a power threshold of the target device; and controlling the display brightness of the current frame of the target equipment based on the brightness sum of the current frame and the total brightness threshold value. Compared with the scheme that the size of all the brightness data is limited through a fixed limiting coefficient all the time in the prior art, the display brightness of the target equipment is dynamically controlled based on the actual total brightness of the current frame of the target equipment and the total brightness threshold value of the target equipment in the scheme of the invention, the display brightness of the current frame of the target equipment can be dynamically controlled according to the actual brightness of the picture, the power (namely the power threshold value) of the target equipment is favorably and effectively utilized, and the picture display effect is favorably improved.
In this embodiment, the luminance data set of the current frame includes a plurality of luminance data corresponding to the current frame of the target device, and each of the luminance data corresponds to one backlight partition of the target device.
In an application scenario, the motherboard platform of the target device is a haisi 810 platform, the matrix backlight includes 5184 partitions (96 rows and 54 columns), and the motherboard platform outputs luminance information corresponding to each frame of image and sends the luminance information to the screen-side chip through SPI data, thereby controlling the luminance of each partition of the screen. A total of 5184 backlight partitions are included, and therefore 5184 luminance data are included in the luminance data set of one frame. And respectively controlling the backlight of each subarea after the screen receives the brightness data, wherein each brightness data is a byte of data with the value of 0x 00-0 xFF, namely the value range of each brightness data is 0x 00-0 xFF, the value of the darkest brightness data is corresponding to 0x00, and the value of the brightest brightness data is corresponding to 0xFF.
Specifically, the step S200 includes: and calculating the sum of all the brightness data in the brightness data set of the current frame to be used as the brightness sum of the current frame. For example, if the current frame is a full white frame, that is, the luminance data of each partition takes a maximum value of 0xFF, a value obtained by multiplying 0xFF by the number of partitions (5184) is used as the luminance sum of the current frame.
Specifically, in this embodiment, as shown in fig. 2, the step S300 includes:
step S301, obtaining a power peak of the target device based on the total number of backlight partitions of the target device and the maximum power value of the backlight partitions.
Step S302, calculating and obtaining a total luminance threshold of the target device based on the ideal peak of the luminance data, the total number of backlight partitions, the power peak of the target device, and the power threshold of the target device, where the ideal peak of the luminance data is a maximum value corresponding to a value range of the luminance data.
In this embodiment, the total number of the backlight partitions of the target device is 5184, where the total number of the backlight partitions of the screen of the target device is correspondingly divided. The backlight partition maximum power value is a power value correspondingly consumed when one backlight partition is displayed at the maximum brightness, and is related to a voltage corresponding to one backlight partition, the number of LED lamps in one backlight partition and the maximum current of the LED lamps. Specifically, the maximum power value of one backlight partition is equal to the product of the voltage corresponding to the backlight partition, the number of the LED lamps in the backlight partition and the maximum current of the LED lamps. In this embodiment, one backlight partition includes one LED lamp, the luminance of each lamp in the matrix backlight may obtain a luminance value from 0 to 0xFF according to the SOC image algorithm, where 0xFF corresponds to the brightest of a single lamp (duty ratio 100%), and the dc output peak is 7.8mA. And the voltage corresponding to each backlight partition is 27V, assuming that the luminance data corresponding to each lamp is 0xFF, the power peak value of the target device is: 7.8ma 5184/1000 x 27 (voltage) =1091W. In this embodiment, the power threshold corresponding to the power supply of the target device is 400W, and the visible power peak is much larger than the power threshold, so that if the display brightness of the target device is not controlled under the full white condition, the power supply may be burned out. Of course, replacing a power supply that can satisfy the condition can solve the problem, but the cost of replacing the power supply is high, so the display brightness of the target device is controlled by the display brightness control method in the invention to protect the target device.
And after calculating the power peak value of the obtained brightness data, further calculating the total brightness threshold value of the target equipment. In this embodiment, one backlight sub-area includes one LED lamp, one LED lamp corresponds to one luminance data, the value range of the luminance data is 0 to 0xFF, and the ideal peak value of the luminance data corresponding to one backlight sub-area is 0xFF. The above-mentioned total brightness threshold is the maximum value of the sum of the brightness data that the target device can bear without burning out (i.e. under the limitation of the power threshold). Specifically, total luminance threshold = ideal peak value total backlight partition number power threshold/power peak value. In one application scenario, for convenience of showing the calculation process and performing comparison, assuming that the power peak of the luminance data obtained by calculation is 1000W, the total luminance threshold =0xff 5184 × 400/1000, that is, the total luminance threshold is two fifths of 0xff 5184, that is, if the current frame is completely white, the corresponding luminance can be controlled to be only two fifths of the ideal luminance, otherwise the power supply of the target device may be burned out, or other problems (such as black screen, other losses, etc.) may occur.
Specifically, in this embodiment, as shown in fig. 3, the step S400 includes:
step S401, when the sum of the luminances of the current frame is not greater than the total luminance threshold, using the luminance data as target luminance data.
Step S402 is executed to acquire a brightness control coefficient when the sum of the brightness of the current frame is greater than the total brightness threshold, and acquire each target brightness data based on the brightness control coefficient and each brightness data.
Step S403, controlling the display brightness corresponding to each backlight partition of the current frame of the target device based on each target brightness data.
In an application scenario, when the sum of the brightness corresponding to the current frame is not greater than the total brightness threshold, it is indicated that the actual working power corresponding to the current frame is within the power threshold of the target device (i.e., within the allowed power value), at this time, it is unnecessary to limit each brightness data, and each brightness data is directly used as the target brightness data finally used for controlling the display brightness, so that the target device (i.e., the television) can fully utilize the power thereof, and the target device obtains a better display effect. At this time, even if some areas are all white (the corresponding brightness data is 0 xFF), the areas do not need to be limited, so that the areas can reach a brightness peak value (peak), namely, the brightness peak value of the corresponding areas can be reached by the television when the user uses a low-power small power supply in the using process, the brightness of the picture is improved, a more real and beautiful display picture is realized, and the quality of the matrix backlight television is improved. In the prior art, the brightness data is always limited, the television cannot realize the brightness peak value of any region, and the brightness of other regions is also reduced, so that the brightness of the whole picture is unnecessarily reduced, and the image quality of the television is influenced.
In another application scenario, when the sum of the brightness of the current frame is greater than the total brightness threshold, it is indicated that if the brightness data is not limited, the actual working efficiency corresponding to the current frame is higher than the power threshold (i.e., the allowed power value) of the target device (i.e., the television), and at this time, each brightness data needs to be limited to prevent the power supply of the target device from being burned out. Therefore, the brightness data is limited based on the brightness control coefficient to obtain the corresponding target brightness data, so that the brightness of each backlight partition is controlled based on each target brightness data, and the target equipment is prevented from being burnt out. The brightness control coefficient can be preset or set and adjusted according to actual requirements. Preferably, in this embodiment, the corresponding brightness control coefficient is calculated and acquired based on the actual power peak value and the power threshold value, so that the power of the target device is fully utilized while the target device is protected, and the display brightness of the picture of the target device is ensured not to be too dark.
Specifically, after the target brightness data is obtained, duty ratios of the LED lamps in the corresponding backlight partitions are controlled based on the target brightness data, so as to control the display brightness corresponding to the backlight partitions of the current frame.
Specifically, in this embodiment, as shown in fig. 4, the step S402 includes:
in step S4021, when the sum of the luminances of the current frame is greater than the total luminance threshold, the sum of the luminances of the current frame is divided by the total luminance threshold to be used as a luminance control coefficient.
In step S4022, each target luminance data is obtained by dividing each target luminance data by the luminance control coefficient.
In one application scenario, luminance coefficient = luminance sum of current frame/total luminance threshold, for example, if the frame of current frame is full white and each luminance data is 0xFF, then luminance sum of current frame is 0xFF × 5184; total luminance threshold = ideal peak value total backlight partition number power threshold/power peak value, in this embodiment power peak value is 1091W, then total luminance threshold =0xff 5184 × 400/1091; the corresponding luminance control coefficient is 0xff × 5184/(0xff × 5184 × 400/1091) =1091/400=2.7. At this time, each luminance data is divided by 2.7 to obtain corresponding target luminance data, i.e., each target luminance data =0xFF/2.7=0x5f.
In another application scenario, the luminance coefficient may also be calculated according to a current frame power value corresponding to the luminance data, where the current frame power value is a power value that may be reached by the target device when displaying according to the luminance data corresponding to the current frame, and specifically, the luminance coefficient = the current frame power value/power threshold. For example, if the frame of the current frame is completely white, each luminance data is 0xFF, the dc output peak of the lamp in each backlight partition is 7.8mA, and the corresponding voltage is 27V, the current frame has a power value =0xFF × 5184 × 7.8 × 27/1000=1091w, the power threshold is preset to 400W, and the luminance coefficient =1091/400=2.7. At this time, each luminance data is divided by 2.7 to obtain corresponding target luminance data, i.e., each target luminance data =0xFF/2.7=0x5f. That is, the target brightness data corresponding to each lamp is changed from 0 to 0x5F, and the operation without exceeding the power of 400W can be realized.
Therefore, when the brightness sum of the current frame is not larger than the total brightness threshold (namely, the television has no burning risk), the display brightness of the current frame is not limited, and when the brightness sum of the current frame is larger than the total brightness threshold (namely, the pre-judged power exceeds the power threshold and the television has the burning risk), the brightness control coefficient is dynamically calculated, and the power protection function is realized according to the brightness control coefficient, so that the television can work under the power threshold (such as rated power).
In an application scenario, before step S403, the method further includes: acquiring the sum of the target brightness data as the current frame backlight brightness value; acquiring a backlight brightness value of a previous frame; when the backlight brightness difference is greater than a preset difference threshold, respectively adjusting the value of each target brightness data based on the backlight brightness difference, a preset change ratio value and the current frame backlight brightness value, wherein the backlight brightness difference is a difference between the current frame backlight brightness value and the previous frame backlight brightness value.
Specifically, when the difference between the brightness of two frames of images played by the user is large, in order to prevent the screen flash caused by the large change of the matrix backlight brightness value, the gradual decrease adjustment may be performed based on the backlight brightness value of the previous frame of data and the backlight brightness value of the current frame of data. The current frame backlight brightness value is the sum of the target brightness data of the current frame obtained by calculation in the above manner, that is, the sum of the brightness data (under the condition of no brightness limitation) or the value obtained by dividing the sum of the brightness data by the brightness control coefficient (under the condition of brightness limitation). The previous frame backlight brightness value is the sum of target brightness data actually used for controlling the screen brightness in the previous frame, and can be calculated and stored for calling at the time of the previous frame. The difference threshold is the maximum value of the preset difference of the backlight brightness values of the front frame and the rear frame, and can be set and adjusted according to actual requirements. The change proportion value is a preset value for controlling the change amplitude of the backlight brightness value of the front frame and the back frame, and can be set and adjusted according to actual requirements. When the backlight brightness difference is greater than the preset difference threshold, it is indicated that the backlight brightness value of the previous frame and the backlight brightness value of the next frame (i.e. the previous frame and the current frame) are changed greatly, and the brightness difference between the two frames is large, at this time, the value of each target brightness data needs to be further adjusted, so as to avoid the occurrence of screen flash.
Specifically, the luminance change value = the backlight luminance difference value/change ratio value based on the backlight luminance difference value and a preset change ratio value. And subtracting the brightness change value from the current frame backlight brightness value to obtain a corresponding current frame backlight target brightness value, wherein the current frame backlight target brightness value is the value which should be reached by all the adjusted target brightness data. And adjusting each target brightness data in proportion based on the current frame backlight target brightness value and the current frame backlight brightness value. In an application scenario, the change ratio value is preferably 2, assuming that the retained previous frame backlight brightness value is 10000, the current frame backlight brightness value is 100, and the difference threshold value is less than 9900, in order to prevent the screen flash caused by too large change, the brightness change value = (10000-100)/2 =4950 is calculated, so that the corresponding current frame backlight target brightness value =10000-4950=5050. Each target luminance data is adjusted according to a ratio of 5050/100=5.05 (for example, each original target luminance data is multiplied by 5.05 to obtain each target luminance data after corresponding adjustment), so that it is ensured that the luminance change is not too large.
Further, if the picture of the next frame is fixed (i.e. the picture of the next frame is the same as the picture of the current frame), the luminance change value corresponding to the next frame is (5050-100)/2 =2475, and the backlight target luminance value of the corresponding next frame =5050-2425=2575. The gradual change control of the brightness is realized through the scheme, so that the brightness is not jumped in a large range to cause screen flash.
In an application scene, the display brightness of the matrix backlight television is controlled by a software control method based on a main chip. After the main chip end calculates and obtains corresponding target brightness data, the target brightness data is directly sent to the screen end in the form of SOC data, and the backlight brightness of the screen end is controlled. Specifically, when the sum of the brightness of the current frame corresponding to the original brightness data calculated by the television main chip is greater than the total brightness threshold, the original brightness data is adjusted to obtain target brightness data (the specific adjustment mode refers to the specific description above), otherwise, the original brightness data is directly used as the target brightness data, and then the target brightness data is sent to the screen end, so that the effect of protecting the television from being burned out is achieved. Therefore, when the power corresponding to the picture brightness is in the allowed power range, the screen brightness is not limited, and when the power corresponding to the picture brightness possibly exceeds the allowed power range, the brightness is uniformly reduced, the screen brightness is limited, the power of the television is fully utilized, and the television is protected from being burnt out. Specifically, the software terminal represents the luminance data corresponding to each partition by using numbers from 0 to 0xFF. In an application scene, a software end realizes the corresponding steps of the display brightness control method through a designed display brightness control program. For example, the sum of the brightness of the current frame corresponding to the original brightness data of the software end is obtained through program circulation, and when the sum of the brightness of the current frame is greater than the corresponding total brightness threshold, the brightness data corresponding to each partition is multiplied by the brightness control coefficient through the program to obtain the target brightness data.
In an application scene, a television main chip calculates and obtains target brightness data, then the target brightness data is adjusted by considering the backlight brightness difference value of front and back frames, then the adjusted target brightness data is sent to a screen terminal SOC in an SPI (serial peripheral interface) data mode, and the screen terminal SOC receives the target brightness data corresponding to each subarea and further controls the backlight brightness corresponding to each subarea. When the sum of the brightness of the current frame is not greater than the total brightness threshold, the single matrix backlight lamp can reach the corresponding brightness peak value, other lamps can not be too dark, and the brightness and the display effect of the whole picture can be improved. When the sum of the brightness of the current frame is greater than the total brightness threshold value, the matrix backlight television can be protected.
Exemplary device
As shown in fig. 5, corresponding to the display brightness control method, an embodiment of the present invention further provides a display brightness control apparatus, where the display brightness control apparatus includes:
a luminance data obtaining module 510, configured to obtain a luminance data set of a current frame of the target device.
The target device is a display device that needs to perform display brightness control, such as a display, a television, and the like. In this embodiment, the target device is specifically a matrix backlight television.
The luminance sum obtaining module 520 is configured to obtain the luminance sum of the current frame based on all the luminance data in the luminance data set of the current frame.
The luminance data set of the current frame is a set of luminance data corresponding to a picture to be displayed by the matrix backlight television at the current frame. Specifically, the matrix backlight television controls the display brightness of each backlight partition through each brightness data. Therefore, the sum of the brightness of the current frame is obtained based on all the brightness data in the brightness data set of the current frame, and the sum of the brightness of the current frame is related to the current (or power) consumed by the sum of the brightness of the current frame and the brightness data corresponding to the picture of the current frame.
A total brightness threshold obtaining module 530, configured to obtain a total brightness threshold of the target device, where the total brightness threshold corresponds to a power threshold of the target device.
The power threshold of the target device is the preset maximum power that the matrix backlight television can bear when working normally. In this embodiment, the power threshold is set as a rated power of the power supply of the target device, and during an actual use process, the power threshold may be adjusted according to an actual requirement, which is not specifically limited herein. The total brightness threshold is the sum of the brightness data corresponding to all the backlight partitions when the working power of the target device reaches the power threshold. For example, if the brightness of all backlight partitions is the same when the operating power of the target device reaches the power threshold (the brightness corresponding to all backlight partitions of the frame is the same), the total brightness threshold is the product of the brightness data corresponding to the backlight partition and the number of backlight partitions in this case.
The control module 540 is configured to control the display brightness of the current frame of the target device based on the brightness sum of the current frame and the total brightness threshold.
Specifically, the display brightness of each backlight partition of the current frame of the target device is controlled based on the sum of the brightness of the current frame and the total brightness threshold, so that the sum of the power consumed by all the actual backlight partitions of the target device is not greater than the power threshold of the target device. Therefore, the actual brightness of the target equipment is dynamically adjusted, the power of the target equipment is effectively utilized, and the target equipment is protected from being burnt out due to overlarge power.
As can be seen from the above, the display brightness control apparatus according to the embodiment of the present invention obtains the brightness data set of the current frame of the target device through the brightness data obtaining module 510; acquiring the brightness sum of the current frame by the brightness sum acquisition module 520 based on all the brightness data in the brightness data set of the current frame; acquiring a total brightness threshold of the target device through a total brightness threshold acquisition module 530, wherein the total brightness threshold corresponds to a power threshold of the target device; the display brightness of the current frame of the target device is controlled by the control module 540 based on the brightness sum of the current frame and the total brightness threshold. Compared with the scheme that the size of all the brightness data is limited through a fixed limiting coefficient all the time in the prior art, the display brightness of the target device is dynamically controlled based on the actual brightness sum of the current frame of the target device and the total brightness threshold value of the target device in the scheme of the invention, the display brightness of the current frame of the target device can be dynamically controlled according to the actual brightness of the picture, the power (namely the power threshold value) of the target device is favorably and effectively utilized, and the picture display effect is favorably improved.
Specifically, in this embodiment, the specific functions of the display brightness control apparatus and the modules thereof may refer to the corresponding descriptions in the display brightness control method, and are not described herein again.
Based on the above embodiment, the present invention further provides an intelligent terminal, and a schematic block diagram thereof may be as shown in fig. 6. The intelligent terminal comprises a processor, a memory, a network interface and a display screen which are connected through a system bus. Wherein, the processor of the intelligent terminal is used for providing calculation and control capability. The memory of the intelligent terminal comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a display luminance control program. The internal memory provides an environment for the operation of an operating system and a display brightness control program in the nonvolatile storage medium. The network interface of the intelligent terminal is used for being connected and communicated with an external terminal through a network. The display brightness control program, when executed by a processor, implements the steps of any of the above-described display brightness control methods. The display screen of the intelligent terminal can be a liquid crystal display screen or an electronic ink display screen.
It will be understood by those skilled in the art that the block diagram shown in fig. 6 is only a block diagram of a part of the structure related to the solution of the present invention, and does not constitute a limitation to the intelligent terminal to which the solution of the present invention is applied, and a specific intelligent terminal may include more or less components than those shown in the figure, or combine some components, or have a different arrangement of components.
In one embodiment, an intelligent terminal is provided, where the intelligent terminal includes a memory, a processor, and a display brightness control program stored in the memory and executable on the processor, and the display brightness control program performs the following operations when executed by the processor:
acquiring a brightness data set of a current frame of target equipment;
acquiring the brightness sum of the current frame based on all the brightness data in the brightness data set of the current frame;
acquiring a total brightness threshold of the target device, wherein the total brightness threshold corresponds to a power threshold of the target device;
and controlling the display brightness of the current frame of the target equipment based on the brightness sum of the current frame and the total brightness threshold value.
An embodiment of the present invention further provides a computer-readable storage medium, where a display brightness control program is stored on the computer-readable storage medium, and when the display brightness control program is executed by a processor, the steps of any one of the display brightness control methods provided in the embodiments of the present invention are implemented.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
It should be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional units and modules is only used for illustration, and in practical applications, the above functions may be distributed as different functional units and modules according to needs, that is, the internal structure of the apparatus may be divided into different functional units or modules to implement all or part of the above described functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention. For the specific working processes of the units and modules in the system, reference may be made to the corresponding processes in the foregoing method embodiments, which are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art would appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the above modules or units is only one type of logical function division, and the actual implementation may be implemented by another division manner, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed.
The integrated modules/units described above, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium and can implement the steps of the embodiments of the method when the computer program is executed by a processor. The computer program includes computer program code, and the computer program code may be in a source code form, an object code form, an executable file or some intermediate form. The computer readable medium may include: any entity or device capable of carrying the above-mentioned computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signal, telecommunication signal, software distribution medium, etc. It should be noted that the contents contained in the computer-readable storage medium can be increased or decreased as required by legislation and patent practice in the jurisdiction.
The above-mentioned embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.
Claims (8)
1. A method for controlling display brightness, the method comprising:
acquiring a brightness data set of a current frame of target equipment;
acquiring the brightness sum of the current frame based on all the brightness data in the brightness data set of the current frame;
acquiring a total brightness threshold of the target device, wherein the total brightness threshold corresponds to a power threshold of the target device;
controlling the display brightness of the current frame of the target equipment based on the brightness sum of the current frame and the total brightness threshold value;
the controlling the display brightness of the current frame of the target device based on the brightness sum of the current frame and the total brightness threshold value comprises:
when the sum of the brightness of the current frame is not greater than the total brightness threshold value, respectively using each brightness data as target brightness data;
when the brightness sum of the current frame is greater than the total brightness threshold, obtaining a brightness control coefficient, wherein the brightness control coefficient is obtained by dividing the brightness sum of the current frame by the total brightness threshold, and obtaining each target brightness data based on the brightness control coefficient and each brightness data includes:
acquiring the sum of the target brightness data as the current frame backlight brightness value; acquiring the sum of target brightness data actually used for controlling the screen brightness of the previous frame as the backlight brightness value of the previous frame;
when the backlight brightness difference is greater than a preset difference threshold, respectively adjusting the value of each target brightness data based on the backlight brightness difference, a preset change ratio value and the current frame backlight brightness value, including:
the current frame backlight target brightness value is the value which should be reached by all the adjusted target brightness data, wherein the current frame backlight target brightness value is equal to the current frame backlight brightness value minus the brightness change value;
the brightness change value is equal to a backlight brightness difference value divided by a change proportion value, wherein the change proportion value is a preset value used for controlling the change amplitude of the backlight brightness value of the previous frame and the backlight brightness difference value is the difference value between the backlight brightness value of the current frame and the backlight brightness value of the previous frame;
and controlling the display brightness corresponding to each backlight partition of the current frame of the target equipment based on each target brightness data.
2. The method according to claim 1, wherein the set of luminance data of the current frame includes a plurality of luminance data corresponding to a current frame of the target device, and each of the luminance data corresponds to one backlight partition of the target device.
3. The method according to claim 1, wherein the obtaining the luminance sum of the current frame based on all the luminance data in the luminance data set of the current frame comprises:
and calculating the sum of all the brightness data in the brightness data set of the current frame as the brightness sum of the current frame.
4. The display brightness control method according to claim 1, wherein the obtaining of a total brightness threshold of the target device, wherein the total brightness threshold corresponds to a power threshold of the target device, comprises:
acquiring a power peak value of the target equipment based on the total number of the backlight partitions of the target equipment and the maximum power value of the backlight partitions;
and calculating and acquiring a total brightness threshold of the target device based on the ideal peak value of the brightness data, the total number of the backlight partitions, the power peak value of the target device and the power threshold of the target device, wherein the ideal peak value of the brightness data is a maximum value corresponding to the value range of the brightness data.
5. The display luminance control method according to claim 1, wherein the obtaining a luminance control coefficient when the sum of the luminances of the current frame is greater than the total luminance threshold, obtaining each target luminance data based on the luminance control coefficient and each of the luminance data, further comprises:
and dividing each brightness data by the brightness control coefficient to obtain each target brightness data.
6. A display luminance control apparatus, characterized in that the apparatus comprises:
the brightness data acquisition module is used for acquiring a brightness data set of a current frame of the target equipment;
a brightness sum obtaining module, configured to obtain a brightness sum of the current frame based on all brightness data in the brightness data set of the current frame;
a total brightness threshold obtaining module, configured to obtain a total brightness threshold of the target device, where the total brightness threshold corresponds to a power threshold of the target device;
the control module is used for controlling the display brightness of the current frame of the target equipment based on the brightness sum of the current frame and the total brightness threshold;
the controlling the display brightness of the current frame of the target device based on the brightness sum of the current frame and the total brightness threshold includes:
when the sum of the brightness of the current frame is not greater than the total brightness threshold value, respectively using each brightness data as target brightness data;
when the brightness sum of the current frame is greater than the total brightness threshold, obtaining a brightness control coefficient, wherein the brightness control coefficient is obtained by dividing the brightness sum of the current frame by the total brightness threshold, and obtaining each target brightness data based on the brightness control coefficient and each brightness data includes:
acquiring the sum of the target brightness data as the current frame backlight brightness value; acquiring the sum of target brightness data actually used for controlling the screen brightness of the previous frame as the backlight brightness value of the previous frame;
when the backlight brightness difference is greater than a preset difference threshold, respectively adjusting the value of each target brightness data based on the backlight brightness difference, a preset change ratio value and the current frame backlight brightness value, including:
the current frame backlight target brightness value is the value which should be reached by all the adjusted target brightness data, wherein the current frame backlight target brightness value is equal to the current frame backlight brightness value minus the brightness change value;
the brightness change value is equal to a backlight brightness difference value divided by a change proportion value, wherein the change proportion value is a preset value used for controlling the change amplitude of the backlight brightness value of the previous frame and the backlight brightness difference value is the difference value between the backlight brightness value of the current frame and the backlight brightness value of the previous frame;
and controlling the display brightness corresponding to each backlight partition of the current frame of the target equipment based on each target brightness data.
7. An intelligent terminal, characterized in that the intelligent terminal comprises a memory, a processor and a display brightness control program stored on the memory and operable on the processor, the display brightness control program, when executed by the processor, implementing the steps of the display brightness control method according to any one of claims 1-5.
8. A computer-readable storage medium, having a display brightness control program stored thereon, which when executed by a processor implements the steps of the display brightness control method according to any one of claims 1-5.
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