CN113851089B - Display brightness control method, device, intelligent terminal and storage medium - Google Patents

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

Display brightness control method, device, intelligent terminal and storage medium

technical field

The present invention relates to the field of display technology, in particular to a display brightness control method, device, intelligent terminal and storage medium.

Background technique

With the development of science and technology, at present, people have higher and higher requirements for display effects of display devices, and how to make display devices output better picture quality has become a hot spot of attention. Better picture quality requires the display device to be the brightest in bright scenes, and darker for dark pictures. In actual use, the power of the display device is limited. If the screen is too bright, the actual power of the display device may be greater than the limited power, causing the display device to burn out.

In the prior art, a fixed limit coefficient is usually preset, and the size of all brightness data used to control the display brightness of the display device is always limited by the limit coefficient, so as to avoid burnout of the display device. The problem with the prior art is that the size of all luminance data is always limited by a fixed limit coefficient, which is not conducive to effectively using the power of the display device, and greatly affects the display effect of the picture.

Therefore, the prior art still needs to be improved and developed.

Contents of the invention

The main purpose of the present invention is to provide a display brightness control method, device, intelligent terminal and storage medium, aiming to solve the problem in the prior art that the size of all brightness data is always limited by a fixed limit coefficient, which is not conducive to the effective use of display devices Power, and greatly affect the problem of screen display.

In order to achieve the above object, the first aspect of the present invention provides a display brightness control method, wherein the above method includes:

Obtain the brightness data set of the current frame of the target device;

Obtain the sum of the brightness of the current frame based on all brightness data in the brightness data set of the current frame above;

Acquiring the total brightness threshold of the target device, where the total brightness threshold corresponds to the power threshold of the target device;

Based on the brightness sum of the current frame and the total brightness threshold, the display brightness of the current frame of the target device is controlled.

Optionally, the brightness data set of the current frame includes a plurality of brightness data corresponding to the current frame picture of the target device, and each of the brightness data corresponds to a backlight partition of the target device.

Optionally, the sum of brightness of the current frame is obtained based on all the brightness data in the brightness data set of the current frame above, including:

The sum of all brightness data in the brightness data set of the current frame is calculated as the sum of the brightness of the current frame.

Optionally, the acquisition of the total brightness threshold of the target device, wherein the total brightness threshold corresponds to the power threshold of the target device, includes:

Acquiring the power peak value of the above-mentioned target device based on the total number of backlight partitions of the above-mentioned target device and the maximum power value of the backlight partition;

Calculate and obtain the total brightness threshold of the target device based on the ideal peak value of the brightness data, the total number of 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 the value obtained from the brightness data The maximum value corresponding to the range of values.

Optionally, 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 threshold of the total brightness above includes:

When the sum of the luminance of the current frame is not greater than the total luminance threshold, each of the luminance data is used as the target luminance data;

When the sum of the brightness of the current frame is greater than the total brightness threshold, a brightness control coefficient is obtained, and each target brightness data is obtained based on the brightness control coefficient and each brightness data;

The display brightness corresponding to each backlight partition of the current frame of the target device is controlled based on each of the target brightness data.

Optionally, when the sum of the brightness of the current frame is greater than the total brightness threshold, the brightness control coefficient is obtained, and each target brightness data is obtained based on the brightness control coefficient and each brightness data, including:

When the brightness sum of the above-mentioned current frame is greater than the above-mentioned total brightness threshold, divide the brightness sum of the above-mentioned current frame by the above-mentioned total brightness threshold as a brightness control coefficient;

Each of the aforementioned brightness data is divided by the aforementioned brightness control coefficient to obtain each target brightness data.

Optionally, before controlling the display brightness corresponding to each backlight partition of the current frame of the target device based on the target brightness data, the above method further includes:

Obtain the sum of the above target brightness data as the backlight brightness value of the current frame;

Get the backlight brightness value of the previous frame;

When the backlight brightness difference is greater than the preset difference threshold, adjust the values of each of the above-mentioned target brightness data based on the backlight brightness difference, the preset change ratio value, and the current frame backlight brightness value, wherein the above-mentioned backlight brightness difference is The difference between the backlight brightness value of the current frame and the backlight brightness value of the previous frame.

A second aspect of the present invention provides a display brightness control device, wherein the above-mentioned device includes:

A brightness data acquisition module, configured to acquire the brightness data set of the current frame of the target device;

A brightness sum acquisition module, configured to acquire the brightness sum of the current frame based on all the brightness data in the brightness data set of the current frame;

A total brightness threshold acquisition module, configured to acquire the total brightness threshold of the target device, wherein the total brightness threshold corresponds to the power threshold of the target device;

A control module, configured to control 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.

The third aspect of the present invention provides an intelligent terminal. The above-mentioned intelligent terminal includes a memory, a processor, and a display brightness control program stored on the above-mentioned memory and operable on the above-mentioned processor. When the above-mentioned display brightness control program is executed by the above-mentioned processor Steps for realizing any one of the above display brightness control methods.

A fourth aspect of the present invention provides a computer-readable storage medium, wherein 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, any one of the steps of the display brightness control method described above is implemented.

It can be seen from the above that in the solution of the present invention, the brightness data set of the current frame of the target device is obtained; based on all the brightness data in the brightness data set of the above-mentioned current frame, the sum of the brightness of the current frame is obtained; the total brightness threshold of the above-mentioned target device is obtained, wherein , the total brightness threshold corresponds to the power threshold of the target device; based on the sum of the brightness of the current frame and the total brightness threshold, the display brightness of the current frame of the target device is controlled. Compared with the scheme in the prior art that always limits the size of all brightness data by a fixed limit coefficient, the scheme of the present invention dynamically adjusts the display brightness of the target device based on the actual brightness sum of the current frame of the target device and the total brightness threshold of the target device. The control can dynamically control the display brightness of the current frame of the target device according to the actual brightness of the screen, which is conducive to effectively using the power of the target device (that is, the power threshold), and is conducive to improving the display effect of the screen.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only of the present invention. For some embodiments, those skilled in the art can also obtain other drawings according to these drawings without paying creative efforts.

FIG. 1 is a schematic flowchart of a display brightness control method provided by an embodiment of the present invention;

FIG. 2 is a schematic flowchart of step S300 in FIG. 1 according to an embodiment of the present invention;

FIG. 3 is a schematic flowchart of step S400 in FIG. 1 according to an embodiment of the present invention;

FIG. 4 is a schematic flowchart of 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 device provided by an embodiment of the present invention;

Fig. 6 is a functional block diagram of an internal structure of a smart terminal provided by an embodiment of the present invention.

Detailed ways

In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without 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 should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and/or components, but does not exclude one or more other features. , whole, step, operation, element, component and/or the presence or addition of a collection thereof.

It should also be understood that the terminology used in the description of the present invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the present invention. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural referents unless the context clearly dictates otherwise.

It should also be further understood that the term "and/or" used in the description of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations .

As used in this specification and the appended claims, the term "if" may be construed as "when" or "once" or "in response to determining" or "in response to detecting" depending on the context. Similarly, the phrases "if determined" or "if detected [the described condition or event]" may be construed, depending on the context, to mean "once determined" or "in response to the determination" or "once detected [the described condition or event]" event]" or "in response to detection of [described condition or event]".

The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Apparently, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

With the development of science and technology, at present, people have higher and higher requirements for display effects of display devices such as smart TVs, and how to make display devices output better picture quality has become a hot spot of attention. Specifically, with the development of smart TV technology and the increase of application scenarios, smart TVs are now ubiquitous and have become an important window for people to understand the outside world and learn. High requirements, for example, better picture quality. Better picture quality requires the display device to be the brightest in bright scenes, and darker for dark pictures. In actual application, the matrix backlight TV screen is very bright and consumes higher power. For example, it may be higher than 1000W under a full-white screen. It is impossible to reach the maximum value. And because the cost of high-power power supply is higher, so the power supply of lower power (such as 400W) is usually used for TV in actual use. In actual use, the power of the display device is limited. If the screen is too bright, the actual power of the display device may be greater than the limited power, causing the display device to burn out.

In the prior art, a fixed limit coefficient is usually preset, and the size of all brightness data used to control the display brightness of the display device is always limited by the limit coefficient, so as to avoid burnout of the display device. For example, the luminance data corresponding to each partition of the smart TV is multiplied by a fixed limit coefficient to protect the power supply. The problem with the prior art is that the size of all luminance data is always limited by a fixed limit coefficient, which is not conducive to effectively using the power of the display device, and greatly affects the display effect of the picture. For example, when a certain TV screen is a 20% white window (the middle 20% is all white, and the others are all black), even if the corresponding actual working power in this case cannot reach the limited power of the TV (such as 400W), The 20% white window will be multiplied by the above limit coefficient, resulting in the full white area in this window cannot reach the maximum brightness, and the brightness of other areas will also be dimmed accordingly, failing to effectively use the power of the TV, and greatly affecting the display effect of the screen.

In order to solve the problems of the prior art, in the solution of the present invention, the brightness data set of the current frame of the target device is obtained; based on all the brightness data in the brightness data set of the above-mentioned current frame, the sum of the brightness of the current frame is obtained; the total brightness of the above-mentioned target device is obtained A brightness threshold, wherein the total brightness threshold corresponds to the power threshold of the target device; based on the sum of brightness of the current frame and the total brightness threshold, the display brightness of the current frame of the target device is controlled. Compared with the scheme in the prior art that always limits the size of all brightness data by a fixed limit coefficient, the scheme of the present invention dynamically adjusts the display brightness of the target device based on the actual brightness sum of the current frame of the target device and the total brightness threshold of the target device. The control can dynamically control the display brightness of the current frame of the target device according to the actual brightness of the screen, which is conducive to effectively using the power of the target device (that is, the power threshold), and is conducive to improving the display effect of the screen.

exemplary method

As shown in FIG. 1, an embodiment of the present invention provides a display brightness control method. Specifically, the above method includes the following steps:

Step S100, acquiring the brightness data set of the current frame of the target device.

Wherein, the above-mentioned target device is a display device that requires display brightness control, such as a monitor, a television, and the like. In this embodiment, the above-mentioned target device is specifically a matrix backlight television, so that the display performance of the matrix backlight display is improved according to the method of the present invention, and user experience is improved.

Step S200, based on all the luminance data in the luminance data set of the current frame, the sum of the luminance of the current frame is obtained.

The luminance data set of the current frame is a set of luminance data corresponding to the picture to be displayed by the matrix backlight television in the current frame. Specifically, the above-mentioned matrix backlight TV controls the display brightness of each backlight partition respectively through each brightness data. Therefore, based on all the brightness data in the brightness data set of the current frame, the sum of the brightness of the current frame is obtained, and the sum of the brightness of the current frame is related to the current (or power) that needs to be consumed by the brightness data corresponding to the screen of the current frame.

Step S300, acquiring the total brightness threshold of the target device, wherein the total brightness threshold corresponds to the power threshold of the target device.

Wherein, the above-mentioned power threshold of the target device is the maximum power that the preset matrix backlight TV can bear when it works normally. In this embodiment, the above-mentioned power threshold is set to the rated power of the power supply of the above-mentioned target device. During actual use, the above-mentioned power threshold can also be adjusted according to actual needs, which is not specifically limited here. The above-mentioned total brightness threshold is the sum of brightness data corresponding to all backlight partitions when the working power of the target device reaches the above-mentioned power threshold. For example, if the working power of the target device reaches the power threshold, the brightness of all backlight partitions is the same (the corresponding brightness of all backlight partitions in this frame is the same), then the above-mentioned total brightness threshold is the brightness data corresponding to the backlight partition in this case and the backlight partition multiplication of numbers.

Step S400, based on the sum of the brightness of the current frame and the total brightness threshold, control the display brightness of the current frame of the target device.

Specifically, the display brightness of each backlight partition in the current frame of the target device is controlled based on the sum of brightness of the current frame and the total brightness threshold, so that the actual sum of power consumed by all backlight partitions of the target device is not greater than the power threshold of the target device. In this way, the actual brightness of the target device is dynamically adjusted, the power of the target device is effectively used, and the target device is protected from being burned due to excessive power.

It can be seen from the above that in the display brightness control method provided by the embodiment of the present invention, the brightness data set of the current frame of the target device is obtained; based on all the brightness data in the brightness data set of the current frame, the sum of the brightness of the current frame is obtained; The total brightness threshold of the device, wherein the total brightness threshold corresponds to the power threshold of the target device; based on the sum of brightness of the current frame and the total brightness threshold, the display brightness of the current frame of the target device is controlled. Compared with the scheme in the prior art that always limits the size of all brightness data by a fixed limit coefficient, the scheme of the present invention dynamically adjusts the display brightness of the target device based on the actual brightness sum of the current frame of the target device and the total brightness threshold of the target device. The control can dynamically control the display brightness of the current frame of the target device according to the actual brightness of the screen, which is conducive to effectively using the power of the target device (that is, the power threshold), and is conducive to improving the display effect of the screen.

In this embodiment, the brightness data set of the current frame includes a plurality of brightness data corresponding to the current frame picture of the target device, and each of the brightness data corresponds to a backlight partition of the target device.

In one application scenario, the mainboard platform of the above-mentioned target device is the Hisilicon 810 platform, and the matrix backlight includes 5184 partitions (96 rows and 54 columns). The mainboard platform outputs the brightness information corresponding to each frame of image, and sends it to the The chip on the screen side controls the brightness of each partition of the screen. A total of 5184 backlight partitions are included, so the brightness data set of one frame includes 5184 brightness data. After the screen receives the brightness data, it controls the backlight of each partition separately. Each of the above brightness data is a byte data with a value of 0x00~0xFF, that is, the value range of each brightness data is 0x00~0xFF, and the darkest brightness data is The value corresponds to 0x00, and the value of the brightest brightness data corresponds to 0xFF.

Specifically, the above step S200 includes: calculating the sum of all brightness data in the brightness data set of the current frame as the sum of the brightness of the current frame. For example, if the current frame is an all-white frame, that is, the brightness data of each partition takes the maximum value of 0xFF, then the value obtained by multiplying 0xFF by the number of partitions (5184) is used as the sum of the brightness of the current frame.

Specifically, in this embodiment, as shown in FIG. 2, the above step S300 includes:

Step S301, acquiring the peak power of the target device based on the total number of backlight zones of the target device and the maximum power value of the backlight zone.

Step S302, calculating and acquiring the total brightness threshold of the target device based on the ideal peak value of the brightness data, the total number of backlight partitions, the peak power of the target device, and the power threshold of the target device, wherein the ideal peak value of the brightness data is the brightness The maximum value corresponding to the value range of the data.

Wherein, the total number of backlight partitions of the above-mentioned target device is the total number of backlight partitions corresponding to the screen of the target device. In this embodiment, it is 5184. In actual use, the total number of backlight partitions of different target devices may be different. The maximum power value of a backlight partition is the corresponding power consumption value of a backlight partition displayed at maximum brightness, which is related to the voltage corresponding to a backlight partition, the number of LED lamps in a backlight partition, and the maximum current of the LED lamp. Specifically, the maximum power value of a backlight partition is equal to the product of the voltage corresponding to the backlight partition, the number of LED lamps in the backlight partition and the maximum current of the LED lamps. In this embodiment, a backlight partition includes one LED light, and the brightness of each light in the matrix backlight will be 0 to 0xFF according to the SOC image algorithm. 0xFF corresponds to the brightest single light (duty cycle 100%), and the peak DC output is 7.8mA. And the voltage corresponding to each backlight partition is 27V, assuming that the brightness data corresponding to each lamp is 0xFF, then the peak power of the above target device is: 7.8mA*5184/1000*27(voltage)=1091W. In this embodiment, the power threshold corresponding to the power supply of the above-mentioned target device is 400W, and it can be seen that the peak power is much larger than the power threshold, so if the display brightness of the target device is not controlled in full white, the power supply may be burned out. Of course, this problem can be solved by replacing the power supply that can meet the conditions, but the cost of replacing the power supply is relatively high. Therefore, in the present invention, the display brightness of the target device is controlled by a display brightness control method to protect the target device.

After calculating and obtaining the peak power of the above brightness data, the total brightness threshold of the target device is further calculated. Wherein, the above-mentioned ideal peak value is the maximum value that the brightness data of a backlight partition can obtain in an ideal state. In this embodiment, one LED lamp is included in one backlight partition, and one LED lamp corresponds to one brightness data. The value of the above-mentioned brightness data is The range is 0 to 0xFF, and the ideal peak value of the brightness data corresponding to one backlight partition is 0xFF. The above-mentioned total brightness threshold is the maximum value of the sum of brightness data that the target device can bear without burning out (that is, under the limit of the power threshold). Specifically, total brightness threshold=ideal peak value*total number of backlight partitions*power threshold value/power peak value. In an application scenario, for the convenience of displaying the calculation process and making comparisons, assuming that the peak power of the above-mentioned brightness data obtained by calculation is 1000W, then the above-mentioned total brightness threshold=0xFF*5184*400/1000, that is, the total brightness threshold is 0xFF *Two-fifths of 5184, that is, if the current frame is completely white, the corresponding brightness can only be controlled at two-fifths of the ideal brightness, otherwise the power supply of the target device may burn out, or other problems (such as black screen, other losses, etc.).

Specifically, in this embodiment, as shown in FIG. 3, the above step S400 includes:

Step S401, when the sum of the luminances of the current frame is not greater than the total luminance threshold, each of the luminance data is used as target luminance data.

Step S402, when the sum of the brightness of the current frame is greater than the total brightness threshold, obtain a brightness control coefficient, and obtain 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 of the 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 means that the actual working power corresponding to the current frame is within the power threshold of the target device (that is, within the allowable power value). Each brightness data is limited, and each brightness data is directly used as the target brightness data for finally controlling the display brightness, so that the target device (ie, the TV) can make full use of its power, so that the target device can obtain a better display effect. At this time, even if some areas are completely white (the corresponding brightness data is 0xFF), there is no need to restrict them so that this area can reach the peak brightness (peak), that is, to meet the requirements of the TV when the user uses a low-power and small power supply during use. The machine can also reach the peak brightness of the corresponding area, improve the brightness of the picture, realize a more realistic and beautiful display picture, and improve the quality of the matrix backlight TV. In the existing technology, the brightness data is always limited, the TV cannot achieve the peak brightness of any area, and the brightness of other areas will also be suppressed, so that the brightness of the entire screen is unnecessarily reduced, affecting the quality of the TV. .

In another application scenario, when the sum of the luminance of the current frame is greater than the above-mentioned total luminance threshold, it means that if the luminance data is not restricted, the actual work efficiency corresponding to the current frame will be higher than the power threshold ( That is, the allowable power value), at this time, it is necessary to limit the brightness data to prevent the power supply of the target device from burning out. Therefore, the corresponding target brightness data is obtained after limiting each brightness data based on the brightness control coefficient, so as to control the brightness of each backlight partition based on each target brightness data, and prevent the target device from being burned out. Wherein, the above-mentioned brightness control coefficient may be set in advance, or may be set and adjusted according to actual needs. Preferably, in this embodiment, the corresponding brightness control coefficient is calculated and obtained based on the actual power peak value and the power threshold, so as to protect the target device while making full use of its power, and ensure that the display brightness of the screen of the target device will not be too dark.

Specifically, after the target brightness data is obtained, the duty cycle of the LED lamps in each corresponding backlight partition is controlled based on each target brightness data, so as to control the display brightness corresponding to each backlight partition of the current frame.

Specifically, in this embodiment, as shown in FIG. 4, the above step S402 includes:

Step S4021, when the sum of brightness of the current frame is greater than the total brightness threshold, dividing the sum of brightness of the current frame by the total brightness threshold is used as a brightness control coefficient.

Step S4022, respectively dividing each of the above-mentioned brightness data by the above-mentioned brightness control coefficient to obtain each target brightness data.

In one application scenario, the brightness coefficient=the sum of the brightness of the current frame/the total brightness threshold, for example, if the picture of the current frame is all white and each brightness data is 0xFF, then the sum of the brightness of the current frame is 0xFF*5184; Total brightness threshold=ideal peak value*the total number of backlight partitions*power threshold/power peak value, in this embodiment, the power peak value is 1091W, then the total brightness threshold=0xFF*5184*400/1091; the corresponding brightness control coefficient is 0xFF*5184/( 0xFF*5184*400/1091)=1091/400=2.7. At this time, each piece of brightness data is divided by 2.7 to obtain corresponding target brightness data, that is, each target brightness data=0xFF/2.7=0x5F.

In another application scenario, the luminance coefficient may also be calculated according to the current frame power value corresponding to the luminance data. The above-mentioned current frame power value is a power value that the target device may achieve when displaying according to the luminance data corresponding to the current frame. Specifically, Brightness coefficient = current frame power value/power threshold. For example, if the screen of the current frame is all white, each brightness data is 0xFF, the peak value of the DC output of each backlight partition is 7.8mA, and the corresponding voltage is 27V, then the current frame power value = 0xFF*5184*7.8* 27/1000=1091W, and the preset power threshold is 400W, brightness factor=1091/400=2.7. At this time, each piece of brightness data is divided by 2.7 to obtain corresponding target brightness data, that is, each target brightness data=0xFF/2.7=0x5F. Even if the target brightness data corresponding to each lamp changes from 0 to 0x5F, it can work without exceeding the power of 400W.

Therefore, it can be realized that when the sum of the brightness of the current frame is not greater than the total brightness threshold (that is, the TV does not have the risk of burning out), the display brightness is not limited, and the sum of the brightness of the current frame is greater than the total brightness threshold (that is, the predicted power will exceed When the power threshold, the TV has a risk of burning out), the brightness control coefficient is dynamically calculated, and the power protection function is realized according to the brightness control coefficient, so that the TV can keep working under the power threshold (such as rated power).

In an application scenario, before the above step S403, the above method further includes: obtaining the sum of the above target brightness data as the backlight brightness value of the current frame; obtaining the backlight brightness value of the previous frame; when the backlight brightness difference is greater than the preset When the difference threshold is set, the value of each of the above-mentioned target brightness data is adjusted based on the backlight brightness difference, the preset change ratio value and the above-mentioned current frame backlight brightness value, wherein the above-mentioned backlight brightness difference is the difference between the above-mentioned current frame backlight brightness value and the above-mentioned previous The difference between the backlight brightness values for one frame.

Specifically, when the brightness difference between the two frames played by the user is large, in order to prevent screen flicker caused by large changes in the brightness value of the matrix backlight, it can be adjusted based on the backlight brightness value of the previous frame data and the backlight brightness value of the current frame. Wherein, the above-mentioned backlight brightness value of the current frame is the sum of the target brightness data of the current frame calculated by the above method, that is, the sum of the brightness data (under the condition of not performing 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 backlight brightness value of the previous frame is the sum of the target brightness data actually used to control the screen brightness in the previous frame, which can be calculated and stored in the previous frame for easy recall. The difference threshold is the maximum value of the preset backlight brightness value difference between the front and rear frames, which can be set and adjusted according to actual needs. The change ratio value is a preset value used to control the change range of the backlight brightness value of the front and rear frames, and can be set and adjusted according to actual needs. When the backlight brightness difference is greater than the preset difference threshold, it means that the backlight brightness values of the preceding and following frames (that is, the previous frame and the current frame) change greatly, and the brightness difference between the two frames is large. At this time, the above targets need to be further adjusted. The value of brightness data to avoid screen flicker.

Specifically, based on the backlight brightness difference and a preset change ratio value, the above brightness change value=backlight brightness difference/change ratio value. The corresponding current frame backlight target brightness value is obtained by subtracting the brightness change value from the current frame backlight brightness value, which is the value that the sum of all the adjusted target brightness data should reach. Each target brightness data is adjusted proportionally based on the current frame backlight target brightness value and the current frame backlight brightness value. In one application scenario, the above-mentioned change ratio value is preferably 2. Assume that the retained backlight brightness value of the previous frame is 10000, the backlight brightness value of the current frame is 100, and the difference threshold is less than 9900. To prevent screen flicker caused by excessive changes, The calculated brightness change value=(10000-100)/2=4950, so the corresponding current frame backlight target brightness value=10000-4950=5050. Adjust the target brightness data according to the ratio of 5050/100=5.05 (for example, multiply the original target brightness data by 5.05 to obtain the corresponding adjusted target brightness data), so as to ensure that the brightness change will not be too large.

Further, if the picture of the next frame is fixed (that is, the picture of the next frame is the same as the picture of the current frame), the brightness change value corresponding to the next frame is (5050-100)/2=2475, and the corresponding backlight of the next frame Target brightness value = 5050-2425 = 2575. The gradual change control of the brightness is realized through the above scheme, so that the brightness will not jump in a large range and cause screen flicker.

In one application scenario, the display brightness of the matrix backlight TV is controlled by software control based on the main chip. That is, after calculating and obtaining the corresponding target brightness data at the main chip side, the target brightness data is directly sent to the screen side in the form of SOC data to control the backlight brightness of the screen side. Specifically, when the TV main chip calculates that the sum of the luminance of the current frame corresponding to the original luminance data is greater than the total luminance threshold, it adjusts the original luminance data to obtain the target luminance data (refer to the detailed description above for the specific adjustment method), otherwise directly The original luminance data is used as the target luminance data, and then the target luminance data is sent to the screen end, so as to achieve the effect of protecting the TV from being burned out. In this way, when the power corresponding to the screen brightness is within the allowable power range, the screen brightness is not limited. When the power corresponding to the screen brightness may exceed the allowable power range, the brightness is uniformly lowered, and the screen brightness is limited to make full use of the TV power. And protect the TV from being burned out. Specifically, the software side uses numbers from 0 to 0xFF to represent the brightness data corresponding to each partition. In one application scenario, the software side implements the steps corresponding to the above display brightness control method through a designed display brightness control program. For example, calculate the brightness sum of the current frame corresponding to the original brightness data on the software side through the program cycle. When the brightness sum of the current frame is greater than the corresponding total brightness threshold, multiply the brightness data corresponding to each partition by the brightness control coefficient through the program to obtain the target Brightness data.

In one application scenario, the main chip of the TV calculates and obtains the target brightness data, and then adjusts the target brightness data by considering the backlight brightness difference between the front and back frames, and then sends the adjusted target brightness data to the screen terminal in the form of SPI data SOC, the SOC on the screen side receives the target brightness data corresponding to each partition, and then controls the brightness of the backlight corresponding to each partition. When the sum of the brightness of the current frame is not greater than the above-mentioned total brightness threshold, a single light of the matrix backlight can reach its corresponding peak brightness, and it can also keep other lights from being too dark, which can improve the brightness and display effect of the overall picture. When the sum of the luminance of the current frame is greater than the above-mentioned total luminance threshold, the matrix backlight TV can be protected.

exemplary device

As shown in FIG. 5, corresponding to the above-mentioned display brightness control method, an embodiment of the present invention further provides a display brightness control device, and the above-mentioned display brightness control device includes:

The brightness data acquisition module 510 is configured to acquire the brightness data set of the current frame of the target device.

Wherein, the above-mentioned target device is a display device that requires display brightness control, such as a monitor, a television, and the like. In this embodiment, the aforementioned target device is specifically a matrix backlight television.

The luminance sum acquisition module 520 is configured to acquire 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 the picture to be displayed by the matrix backlight television in the current frame. Specifically, the above-mentioned matrix backlight TV controls the display brightness of each backlight partition respectively through each brightness data. Therefore, based on all the brightness data in the brightness data set of the current frame, the sum of the brightness of the current frame is obtained, and the sum of the brightness of the current frame is related to the current (or power) that needs to be consumed by the brightness data corresponding to the screen of the current frame.

The total brightness threshold obtaining module 530 is configured to obtain the total brightness threshold of the target device, wherein the total brightness threshold corresponds to the power threshold of the target device.

Wherein, the above-mentioned power threshold of the target device is the maximum power that the preset matrix backlight TV can bear when it works normally. In this embodiment, the above-mentioned power threshold is set to the rated power of the power supply of the above-mentioned target device. During actual use, the above-mentioned power threshold can also be adjusted according to actual needs, which is not specifically limited here. The above-mentioned total brightness threshold is the sum of brightness data corresponding to all backlight partitions when the working power of the target device reaches the above-mentioned power threshold. For example, if the working power of the target device reaches the power threshold, the brightness of all backlight partitions is the same (the corresponding brightness of all backlight partitions in this frame is the same), then the above-mentioned total brightness threshold is the brightness data corresponding to the backlight partition in this case and the backlight partition multiplication of numbers.

The control module 540 is configured to control the display brightness of the current frame of the target device based on the sum of brightness of the current frame and the total brightness threshold.

Specifically, the display brightness of each backlight partition in the current frame of the target device is controlled based on the sum of brightness of the current frame and the total brightness threshold, so that the actual sum of power consumed by all backlight partitions of the target device is not greater than the power threshold of the target device. In this way, the actual brightness of the target device is dynamically adjusted, the power of the target device is effectively used, and the target device is protected from being burned due to excessive power.

It can be seen from the above that the display brightness control device provided by the embodiment of the present invention obtains the brightness data set of the current frame of the target device through the brightness data acquisition module 510; through the brightness sum acquisition module 520 based on all the brightness data in the brightness data set of the current frame above, Obtain the sum of the brightness of the current frame; obtain the total brightness threshold of the target device through the total brightness threshold acquisition module 530, wherein the total brightness threshold corresponds to the power threshold of the target device; through the control module 540 based on the sum of the brightness of the current frame And the above-mentioned total brightness threshold, which controls the display brightness of the current frame of the above-mentioned target device. Compared with the scheme in the prior art that always limits the size of all brightness data by a fixed limit coefficient, the scheme of the present invention dynamically adjusts the display brightness of the target device based on the actual brightness sum of the current frame of the target device and the total brightness threshold of the target device. The control can dynamically control the display brightness of the current frame of the target device according to the actual brightness of the screen, which is conducive to effectively using the power of the target device (that is, the power threshold), and is conducive to improving the display effect of the screen.

Specifically, in this embodiment, the specific functions of the above-mentioned display brightness control device and its modules can refer to the corresponding description in the above-mentioned display brightness control method, which will not be repeated here.

Based on the above embodiments, the present invention also provides an intelligent terminal, the functional block diagram of which may be shown in FIG. 6 . The above intelligent terminal includes a processor, a memory, a network interface and a display screen connected through a system bus. Wherein, the processor of the smart terminal is used to provide calculation and control capabilities. The memory of the smart terminal includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a display brightness control program. The internal memory provides an environment for the operation of the operating system and the display brightness control program in the non-volatile storage medium. The network interface of the smart terminal is used to communicate with external terminals through a network connection. When the display brightness control program is executed by the processor, the steps of any one of the above-mentioned display brightness control methods are implemented. The display screen of the smart terminal may be a liquid crystal display screen or an electronic ink display screen.

Those skilled in the art can understand that the functional 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 on the smart terminal to which the solution of the present invention is applied. The specific smart terminal More or fewer components than shown in the figures may be included, or certain components may be combined, or have a different arrangement of components.

In one embodiment, an intelligent terminal is provided. The above-mentioned intelligent terminal includes a memory, a processor, and a display brightness control program stored on the above-mentioned memory and operable on the above-mentioned processor. The above-mentioned display brightness control program is controlled by the above-mentioned processor. The following operation instructions are carried out during execution:

Obtain the brightness data set of the current frame of the target device;

Obtain the sum of the brightness of the current frame based on all brightness data in the brightness data set of the current frame above;

Acquiring the total brightness threshold of the target device, where the total brightness threshold corresponds to the power threshold of the target device;

Based on the brightness sum of the current frame and the total brightness threshold, the display brightness of the current frame of the target device is controlled.

The embodiment of the present invention also provides a computer-readable storage medium. The display brightness control program is stored on the computer-readable storage medium. When the display brightness control program is executed by a processor, any display brightness provided by the embodiment of the present invention can be realized. The steps of the control method.

It should be understood that the sequence numbers of the steps in the above embodiments do not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic, and should not constitute any limitation to the implementation process of the embodiment of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used for illustration. In practical applications, the above-mentioned functions can be assigned to different functional units, Module completion means that the internal structure of the above-mentioned device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment may be integrated into one processing unit, or each unit may exist separately physically, or two or more units may be integrated into one unit, and the above-mentioned integrated units may adopt hardware It can also be implemented in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the present invention. For the specific working process of the units and modules in the above system, reference may be made to the corresponding process in the foregoing method embodiments, and details will not be repeated here.

In the above-mentioned embodiments, the descriptions of each embodiment have their own emphases, and for parts that are not detailed or recorded in a certain embodiment, refer to the relevant descriptions of other embodiments.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functions in different ways for each particular application, but such implementation should not be considered as exceeding the scope of the present invention.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal equipment and method may be implemented in other ways. For example, the device/terminal device embodiments described above are only illustrative. For example, the division of the above-mentioned modules or units is only a logical function division. In actual implementation, other division methods may be used, such as multiple units or Components may be combined or integrated into another system, or some features may be omitted, or not implemented.

If the above-mentioned integrated modules/units are realized in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the present invention realizes all or part of the processes in the methods of the above embodiments, and can also be completed by instructing related hardware through computer programs. The above computer programs can be stored in a computer-readable storage medium. When executed by the processor, the steps in the above-mentioned various method embodiments can be realized. Wherein, the above-mentioned computer program includes computer program code, and the above-mentioned computer program code may be in the form of source code, object code, executable file or some intermediate form. The above-mentioned computer-readable medium may include: any entity or device capable of carrying the above-mentioned computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random Access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the above computer-readable storage medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction.

The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand; The technical solutions recorded in the examples are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not mean that the essence of the corresponding technical solutions deviates from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should be included in this document. within the scope of protection of the invention.

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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