CN106919358B - Display control method and device of mobile terminal and mobile terminal - Google Patents

Display control method and device of mobile terminal and mobile terminal Download PDF

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Publication number
CN106919358B
CN106919358B CN201710142042.2A CN201710142042A CN106919358B CN 106919358 B CN106919358 B CN 106919358B CN 201710142042 A CN201710142042 A CN 201710142042A CN 106919358 B CN106919358 B CN 106919358B
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frame rate
target
preset
difference value
determining
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CN106919358A (en
Inventor
易永鹏
彭德良
苟生俊
袁晓日
甘高亭
郑志勇
杨海
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/1423Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
    • G06F3/1431Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display using a single graphics controller
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 – G06F13/00 and G06F21/00
    • G06F1/26Power supply means, e.g. regulation thereof
    • G06F1/32Means for saving power
    • G06F1/3203Power management, i.e. event-based initiation of power-saving mode
    • G06F1/3234Power saving characterised by the action undertaken
    • G06F1/325Power saving in peripheral device
    • G06F1/3265Power saving in display device
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/011Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
    • G06F3/013Eye tracking input arrangements
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00Arrangements for program control, e.g. control units
    • G06F9/06Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44Arrangements for executing specific programs
    • G06F9/451Execution arrangements for user interfaces

Abstract

The embodiment of the invention discloses a display control method and device of a mobile terminal and the mobile terminal. The method comprises the following steps: acquiring a difference value of a current display picture and a previous frame display picture relative to a preset parameter in a first preset time period; calculating the average value of the obtained difference values to obtain a target average difference value corresponding to a first preset time period; and determining a corresponding target frame rate according to the target average difference value and a preset corresponding relation, and controlling the mobile terminal to execute corresponding image layer drawing, image layer synthesis or screen refreshing operation according to the target frame rate. By adopting the technical scheme, the target frame rate can be dynamically determined according to the change condition of the display picture, and the display control of the mobile terminal is optimized.

Description

Display control method and device of mobile terminal and mobile terminal
Technical Field
The embodiment of the invention relates to the technical field of mobile terminals, in particular to a display control method and device of a mobile terminal and the mobile terminal.
Background
At present, with the rapid development of mobile terminal technology, the size of the display screen of the mobile terminal is larger and larger, the loaded application programs and the functions that can be realized are richer and richer, and a user spends a large amount of time using the mobile terminal every day, so that the power consumption condition of the mobile terminal becomes an important index for considering the working performance of the mobile terminal.
The display control scheme of the mobile terminal has a large influence on the power consumption situation, and the existing display control scheme of the mobile terminal is to be improved.
Disclosure of Invention
The embodiment of the invention provides a display control method and device of a mobile terminal and the mobile terminal, which can optimize a display control scheme of the mobile terminal.
In a first aspect, an embodiment of the present invention provides a display control method for a mobile terminal, including:
acquiring a difference value of a current display picture and a previous frame display picture relative to a preset parameter in a first preset time period;
calculating an average value of the obtained difference values to obtain a target average difference value corresponding to the first preset time period;
determining a corresponding target frame rate according to the target average difference value and a preset corresponding relation, wherein the preset corresponding relation comprises a preset corresponding relation between the average difference value and a frame rate, and the frame rate comprises at least one of a drawing frame rate, a synthesis frame rate and a refreshing frame rate;
and controlling the mobile terminal to execute corresponding layer drawing, layer composition or screen refreshing operation according to the target frame rate.
In a second aspect, an embodiment of the present invention provides a display control apparatus for a mobile terminal, including:
the difference value acquisition module is used for acquiring the difference value of the current display picture and the previous frame display picture relative to the preset parameters in a first preset time period;
the average value calculating module is used for calculating the average value of the acquired difference values to obtain a target average difference value corresponding to the first preset time period;
a target frame rate determining module, configured to determine a corresponding target frame rate according to the target average difference value and a preset corresponding relationship, where the preset corresponding relationship includes a preset corresponding relationship between an average difference value and a frame rate, and the frame rate includes at least one of a rendering frame rate, a composite frame rate, and a refresh frame rate;
and the display control module is used for controlling the mobile terminal to execute corresponding layer drawing, layer composition or screen refreshing operation according to the target frame rate.
In a third aspect, an embodiment of the present invention provides a mobile terminal, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the computer program to implement the following steps:
acquiring a difference value of a current display picture and a previous frame display picture relative to a preset parameter in a first preset time period;
calculating an average value of the obtained difference values to obtain a target average difference value corresponding to the first preset time period;
determining a corresponding target frame rate according to the target average difference value and a preset corresponding relation, wherein the preset corresponding relation comprises a preset corresponding relation between the average difference value and a frame rate, and the frame rate comprises at least one of a drawing frame rate, a synthesis frame rate and a refreshing frame rate;
and controlling the mobile terminal to execute corresponding layer drawing, layer composition or screen refreshing operation according to the target frame rate.
According to the display control scheme of the mobile terminal provided by the embodiment of the invention, the difference value of the current display picture and the previous frame of display picture relative to the preset parameter is obtained in a first preset time period; calculating the average value of the obtained difference values to obtain a target average difference value corresponding to a first preset time period; and determining a corresponding target frame rate according to the target average difference value and a preset corresponding relation, and controlling the mobile terminal to execute corresponding image layer drawing, image layer synthesis or screen refreshing operation according to the target frame rate. By adopting the technical scheme, the target frame rate can be dynamically determined according to the change condition of the display picture, and the display control of the mobile terminal is optimized.
Drawings
Fig. 1 is a flowchart illustrating a display control method of a mobile terminal according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a display process according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a Vsync display refresh mechanism according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating another display control method for a mobile terminal according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a display interface according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of another display interface provided in the embodiment of the present invention;
fig. 7 is a block diagram of a display control apparatus of a mobile terminal according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the steps as a sequential process, many of the steps can be performed in parallel, concurrently or simultaneously. In addition, the order of the steps may be rearranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
Fig. 1 is a flowchart illustrating a display control method of a mobile terminal according to an embodiment of the present invention, where the method may be executed by a display control apparatus of the mobile terminal, where the apparatus may be implemented by software and/or hardware, and may generally be integrated in the mobile terminal. As shown in fig. 1, the method includes:
step 101, obtaining a difference value of a current display frame and a previous frame display frame with respect to a preset parameter in a first preset time period.
The mobile terminal in the embodiment of the present invention may specifically be a device including a display screen, such as a mobile phone, a smart watch, a tablet computer, a game machine, a personal digital assistant, and a digital multimedia player.
The operating system loaded in the mobile terminal is not limited in the embodiment of the invention, and can be an Android (Android) system, a mobile Phone window (Windows Phone, WP) operating system, a Linux and IOS system and the like. For convenience of description, the embodiments of the present invention are described in the following with a common Android system.
The following is a brief description of a process from generation to display of a display screen in the Android system, taking the Android system as an example. Fig. 2 is a schematic diagram of a display process according to an embodiment of the present invention.
First, in an Application (Application) layer, each Application program (hereinafter, referred to as Application or APP) includes 1 or more layers, each Application APP1, APP2 … APPN individually executes a layer drawing (Render) operation (i.e., drawing an image on a layer) according to its Application design condition (generally determined by a corresponding installation package APK), and after the drawing operation is completed, each Application sends all the drawn layers to a layer composition module (Surface flanger) that executes the layer composition operation.
Then, at an application Framework (Framework) layer, all layers (including visible layers and invisible layers) form a layer list, which is defined as ListAll. And the layer synthesis module selects the visible layers from the ListAll to form a visible layer list, which is defined as a DisplayList. Then, the layer composition module finds out a free FB from three Frame buffers (BF or Buffer for short) that can be recycled in the system, and superimposes layers included in the DisplayList together through composition (composite) operation on the free FB according to application configuration information, such as which layer should be set at the bottom, which layer should be set at the top, which area is a visible area, and which area is a transparent area, to obtain a final picture that needs to be displayed on the screen.
Finally, at the Kernel layer, the synthesized picture can be transmitted to display hardware (including a display controller and a display screen), so that the picture is finally displayed on the display screen. The type of the Display screen is not limited, and may be, for example, a Liquid Crystal Display (LCD).
In addition, the Android system introduces a synchronization (Vsync) refresh mechanism during the display refresh. Fig. 3 is a schematic diagram of a Vsync display refresh mechanism according to an embodiment of the present invention. Specifically, the Vsync refresh mechanism is a unified management mechanism that inserts a "heartbeat", i.e., a system synchronization (Vsync) signal, in the whole display process, and sends the signal to the CPU to generate a Vsync interrupt, so as to control each layer drawing operation and layer composition operation to be completed according to the heartbeat, thereby incorporating key steps in the whole display process into the Vsync. The frequency of the Vsync signal is currently typically 60 Hz. As shown in fig. 3, assuming that the period of the Vsync signal is T, regardless of the transmission delay of the signal, after the first Vsync signal Vsync1 reaches the CPU, the CPU forwards the first Vsync signal Vsync1 to each application, which starts to perform a drawing operation in response to a user's touch slide or the like on the display screen; and obtaining a plurality of layers drawn by each application after each application finishes the drawing operation. After the second Vsync signal Vsync2 reaches the CPU, the CPU forwards the second Vsync signal Vsync2 to the layer composition module, and the layer composition module starts to perform layer composition operations to combine the plurality of layers drawn by each application to generate a picture to be displayed. After the third Vsync signal Vsync3 reaches the CPU, the system starts performing a display refresh and finally displays the picture just synthesized on the display screen. As can be seen from the above description, the frequencies of the Vsync signals received by the application program, the layer composition module, and the display screen are consistent and are fixed values set in advance.
In the embodiment of the present invention, the first preset time period may be understood as a dynamic adjustment period of the frame rate, and may be set according to actual requirements. For example, the first preset period may be 1 second, and assuming that the screen refresh frequency is 60Hz, there are 60 frames of display within 1 second.
For example, the preset parameters may be gray scale values (or gray scales) (expressed by a numerical value between 0 and 255), color levels, brightness, contrast, saturation, and the like. Preferably, the gray-scale value is used for comparison, which has the advantages of less calculation amount and high execution efficiency of comparison operation. The algorithm of the difference value of the preset parameters can be various and can be selected according to specific preset parameters. For example, the preset parameter is a gray value, and the difference value of the gray values may be a difference value between a gray average value of the current display frame and a gray average value of the previous frame display frame. As shown in the above example, the first preset time interval is 1 second, the screen refresh frequency is 60Hz, 60 frames of display images are obtained in 1 second, and the difference value between each frame of display image and the previous frame of display image with respect to the preset parameter is obtained, so as to obtain 60 difference values.
And 102, calculating an average value of the acquired difference values to obtain a target average difference value corresponding to a first preset time period.
In this step, the average value of the acquired difference values is calculated, and the average value is preferably the average value of the absolute values of the difference values. The target average difference value corresponding to the first preset time period may be recorded as deltaF.
And 103, determining a corresponding target frame rate according to the target average difference value and a preset corresponding relation.
The preset corresponding relation comprises a corresponding relation between a pre-established average difference value and a frame rate, and the frame rate comprises at least one of a drawing frame rate, a synthesis frame rate and a refresh frame rate.
In the process of drawing, synthesizing and refreshing display of a layer of a mobile terminal, 3 frame rates exist: a rendering frame rate, a composition frame rate, and a refresh frame rate (also called a screen refresh rate or refresh rate).
The drawing frame rate is a frame rate for triggering the layer synthesis module to perform layer synthesis after the layer is drawn, and may be understood as a frame number of layers drawn in unit time (e.g., 1 second). The drawing frame rate comprises a drawing frame rate corresponding to an application program and a drawing frame rate corresponding to a single image layer. There may be multiple applications running in the system, and each application may include multiple layers, for example, a video player application typically includes three layers: a layer for displaying video content, which may be defined as U1; two SurfaceView type layers, one for displaying the barrage content, may be defined as U2, and the other for displaying User Interface (UI) controls (e.g., a Play progress bar, a volume control bar, and various control buttons, etc.) and advertisements, may be defined as U3. The drawing frame rate corresponding to the application program is the number of times of executing the drawing operation of the image layer within unit time of the application program, wherein one or more image layers may be drawn when one drawing operation is executed. The drawing frame rate corresponding to the single layer is the number of times of drawing triggered in unit time of the layer with the same number or name (such as the previous U1, U2 or U3).
The synthesis frame rate is a frame rate at which layers drawn by each application are synthesized into a picture to be displayed, and can be understood as a number of picture frames synthesized in unit time.
The screen refreshing rate is the frame rate of refreshing the display screen of the mobile terminal. Typically, the display screen will be refreshed at a refresh rate of 60 Hz.
For example, the specific way of determining the corresponding target frame rate according to the target average difference value and the preset corresponding relationship may be: determining a target interval range corresponding to the target average difference value; and determining the corresponding target frame rate according to the target interval range and a preset corresponding relation, wherein the preset corresponding relation comprises the corresponding relation between the preset interval range and the frame rate.
For example, deltaF>k1When f, the target frame rate (including the drawing frame rate, the synthesis frame rate and the refreshing frame rate) is 60 Hz; k is a radical of2f<deltaF≤k1When f is needed, the target frame rate is 50 Hz; k is a radical of3f<deltaF≤k2When f is needed, the target frame rate is 40 Hz; deltaF is less than or equal to k3At f, the target frame rate is 30 Hz. Wherein, the value of f can be freely set, for example, 10; k is a radical of1、k2、k3Can be freely set, but k should be ensured1>k2>k3E.g. k1=6、k25 and k34. It is understood that the target rendering frame rate, the target composition frame rate and the target refresh frame rate may be different from each other, such as 4f<deltaF is less than or equal to 5fThe rendering frame rate is 35Hz, the composite frame rate is 38Hz, and the refresh frame rate is 40 Hz. In general, the smaller the boundary value corresponding to the section where the deltaF is located, the smaller the corresponding target frame rate. When the change of the display picture is fast, a high target frame rate can be kept, and the consistency of the display picture can be ensured; when the change of the display picture is slow, a low target frame rate can be adopted, the power consumption of the system can be reduced, the normal display of the display picture is hardly influenced, and the normal watching of a user can be met.
For example, the preset correspondence may further satisfy the following formula:
Y=aX+b
wherein, Y is the frame rate, X is the average difference value, a is the first predetermined coefficient, and b is the second predetermined coefficient.
Preferably, a is 30/255 and b is 30, in which case Y30/255 deltaF +30 is obtained.
The advantage of adopting the formula is that the target frame rates corresponding to different average difference values can be determined more accurately, so that the frame rate adjustment is smoother.
And step 104, controlling the mobile terminal to execute corresponding layer drawing, layer composition or screen refreshing operation according to the target frame rate.
The target drawing frame rate may be a maximum drawing frame rate when the application draws the layer. The performing of the layer drawing operation according to the target drawing frame rate may be changing a frequency of a reference signal (such as the Vsync signal sent to the application) sent to the application to the target drawing frame rate, or changing a response mechanism of the layer drawing operation of the application to the reference signal to limit a maximum drawing frame rate when the application draws the layer to be within the target drawing frame rate. For example, the received 2n +1 th signal responds, and the received 2n signal does not respond; for another example, n (e.g., 5) signals are grouped, and the signal with the first type of preset number (e.g., 1,2,4,5) in each group is responded, and the signal with the second type of preset number (e.g., 4) is not responded.
The target composition frame rate may be a maximum composition frame rate when the layer composition module (e.g., Surface flanger) composes the layer. The performing of the layer synthesis operation according to the target synthesis frame rate may be changing a frequency of a reference signal (e.g., Vsync signal) sent to the layer synthesis module to the target synthesis frame rate, or changing a response mechanism of the layer synthesis operation of the layer synthesis module to the reference signal to limit a maximum drawing frame rate when the application draws the layer to the target drawing frame rate (as described above, for example).
Performing the display refresh operation according to the target refresh rate can adjust the frequency of the reference signal (e.g., Vsync signal) sent to the display screen to the target refresh rate, and can also change the response mechanism of the display refresh operation of the display screen to the reference signal to achieve the effect of making the frequency of the screen refresh equal to the target refresh rate (as in the above example).
As can be seen from the above description, in the embodiment of the present invention, the frequencies of the Vsync signals received by the application program, the layer composition module, and the display screen are independent, and may be the same or different, so that the advantage of this configuration is that the combination of different signal frequencies can be selected according to different requirements (e.g., different display scenes), so as to optimize the display control.
The display control method of the mobile terminal provided by the embodiment of the invention is characterized in that a difference value of a current display picture and a previous display picture related to a preset parameter is obtained in a first preset time period; calculating the average value of the obtained difference values to obtain a target average difference value corresponding to a first preset time period; and determining a corresponding target frame rate according to the target average difference value and a preset corresponding relation, and controlling the mobile terminal to execute corresponding image layer drawing, image layer synthesis or screen refreshing operation according to the target frame rate. By adopting the technical scheme, the target frame rate can be dynamically determined according to the change condition of the display picture, and the display control of the mobile terminal is optimized.
Fig. 4 is a schematic flowchart of another display control method for a mobile terminal according to an embodiment of the present invention, where the method includes the following steps:
step 401, determine the region of interest in the display.
Preferably, the display screen may be divided into a preset number of regions according to a preset division rule, and the region of interest may be determined from the plurality of regions. The preset division rule may be an average division into multiple rectangles with equal areas, for example, the length of the picture is divided into M parts, and the width of the picture is divided into N parts, so as to obtain M × N rectangular regions with equal areas. The area of the rectangle around the picture is larger than that of the rectangle in the center.
Preferably, the target display scene category corresponding to the current display picture can be identified, the corresponding target division rule is determined according to the target display scene category, the current display picture and the previous frame display picture are divided into a plurality of regions with preset number according to the target division rule, and the region of interest is determined from the plurality of regions. The advantage of such an arrangement is that a plurality of display scene categories can be defined in advance, and a specific division rule is set for each display scene with respect to factors such as the characteristics and style of each display scene category, thereby achieving more reasonable region division.
Further, the display scene category corresponding to the current display picture can be identified according to at least one of the following items: the method comprises the following steps of obtaining attribute of an application program running in the mobile terminal, sensing data and touch data obtained by a sensor and layer attribute of each layer in a layer set drawn by the application program. The attribute of the application program may include a name of the application program and a process name (which may be one or more and is determined by an operating condition of the application program) corresponding to the application program; the sensor may be at least one of a distance sensor, a light sensor, a magnetic field sensor, a weight sensor, an acceleration sensor, a direction sensor, a gyroscope sensor, a rotation vector sensor, an air pressure sensor, a temperature sensor, and a humidity sensor; the touch data can comprise data such as touch positions, touch areas, touch duration and the like; the layer attributes comprise at least one of layer identification (such as layer name or number), whether the cache data is empty, a horizontal screen or vertical screen mode, attributes of a visible region, attributes of a transparent region, whether an update region exists, attributes of an update region, and image information. The properties of the visible region include at least one of: whether the visible area is empty or not (after an application program draws a layer, the cache data corresponding to the layer comprises coordinate information of the visible area in the layer, the visible area is generally a rectangle, and when the coordinates of four vertexes of the rectangle are the same, the visible area is considered to be empty), the number, the shape, the size and the position of the visible area; the properties of the transparent region include at least one of: the number, shape, size, location of transparent regions and relative location to visible regions of other layers; the attributes of the update region include at least one of: updating the number, position, shape, size and ratio of area to screen area of the region; the image information includes at least one of: whether the image is at least one of a solid color (including color data being all 0), a tone scale, a gray scale, a hue, a contrast, a brightness, a saturation, a transparency, and a blur.
It can be understood that the more elements are used for identifying the display scene category, the more accurate the identification result is, and the selection can be performed according to actual requirements. Preferably, in order to increase the recognition speed, in the embodiment of the present invention, a process name and a layer identifier corresponding to an application program may be selected to perform recognition of a display scene category.
The number of the regions of interest in the embodiment of the present invention may be one or more. For example, there are many ways to determine the region of interest, and the following listed implementations are merely illustrative.
For example, the region of interest in the display screen may be determined according to a received input operation of the user based on the screen of the mobile terminal, wherein the input operation includes a touch input operation or an eye focus input operation. Further, a region of interest is determined from the plurality of regions according to a received user input operation based on a screen of the mobile terminal. When the input operation is touch input operation, a screen of the mobile terminal comprises a touch screen, and touch input operation of a user is received through the touch screen; when the input operation is an eye focusing input operation, a camera (such as a front camera or a rotatable camera positioned on the front of the mobile terminal) can be arranged above the screen of the mobile terminal, an image containing the face of the user is captured by the camera, the focusing position of the eyes of the user on the screen is determined by identifying the positions of eyeballs, and then the eye focusing input operation of the user is received.
For example, the position of the input operation of the user in the screen may be understood as a position in which the user is interested. For example, fig. 5 is a schematic diagram of a display interface according to an embodiment of the present invention, a display screen is divided into 12 rectangular regions, when a user uses an input method control to input characters, an input operation may fall into a display position of the input method control 501 in a screen (e.g., below the screen shown in fig. 5), at this time, the user may concentrate on the content displayed in this region and may not focus on other content (e.g., the web page 502 in fig. 2), and a region corresponding to the input method control 501 may be determined as an area of interest (i.e., 6 rectangular regions below the screen). For another example, fig. 6 is a schematic diagram of another display interface provided by an embodiment of the present invention, in which a display screen is divided into 15 rectangular areas, when a user uses a video playing application to watch a movie, if an advertisement 602 appears on the screen in addition to the movie picture 601 (occupying 14 rectangular areas), as shown in fig. 6, the advertisement 602 appears in the lower left corner of the screen (occupying 1 rectangular area), the user's eyes should focus on the area where the movie picture 601 is located, rather than the area in which the advertisement 602 is located, is more precise, when the screen size of the mobile terminal is large, it can also be recognized that the user's eyes are focused at a specific location in the movie scene, such as the location corresponding to the character 603 in the movie, the region corresponding to the movie picture 601 or the region corresponding to the character 603 (occupying 4 rectangular regions) may be determined as the region of interest, and may be specifically implemented by a related technology such as image edge detection. For another example, for a game application, similar to a video playing application, when playing a game, a user usually focuses attention on an object (such as a character, an animal, or an article) operated by the user, but does not care about a background (such as a grove, a tree, a building, and the like) in a game interface, so that the operation object of the user can be identified according to a position focused by the eyes of the user, and an area corresponding to the operation object can be determined as an area of interest.
Optionally, the step may include: determining an operation center of the input operation in the screen, determining an operation object according to the coordinates of the operation center in the screen, and determining an interested area from the plurality of areas according to the area where the operation object is located. An advantage of the optimization here is that the region of interest can be determined accurately. As shown in fig. 5, when a user performs character input through touch operation, the operation center is the center position of the user's finger when touching the screen, the coordinates of the operation center fall within the area where the input method control 501 is located, the input method control 501 is determined as an operation object, and the area where the input method control 501 is located is determined as an area of interest. For another example, in fig. 6, the eye focus position of the user is an operation center, the coordinates of the operation center fall within the area where the movie screen 601 is located, the movie screen 601 is determined as an operation object, and the area where the movie screen 601 is located is determined as an area of interest.
Optionally, the region of interest in the current display screen may be determined according to the target display scene category and a second preset corresponding relationship, where the second preset corresponding relationship includes a preset corresponding relationship between the display scene category and the region of interest. The method has the advantages that after the region division rule is determined according to the type of the target display scene, the corresponding region of interest can be rapidly determined without additional judgment, and the speed of determining the region of interest is increased. Further, an area of interest may be determined from the plurality of areas in the current display screen according to the target display scene category and the second preset correspondence. For example, when it is determined that the current video playing application plays a video according to the process and layer identification corresponding to the application program, and the contents of two layers are simultaneously displayed, including a video content layer and an advertisement content layer, a display area corresponding to the video content layer may be determined as an area of interest, and for one video playing application, an area for displaying an advertisement is generally fixed, as shown in fig. 6, assuming that an advertisement area is located in a rectangular area at the lower left corner, so 14 rectangular areas outside the advertisement area may be determined as the area of interest. For another example, referring to fig. 5, the target scene category is an input scene, the position of the input method control is generally fixed, and the region where the input method control in the input scene is located may be directly determined as the region of interest.
Step 402, acquiring a difference value of the region of interest in the current display picture and the corresponding region of interest in the previous frame of display picture with respect to a preset parameter in a first preset time period.
And 403, calculating an average value of the acquired difference values to obtain a target average difference value corresponding to the first preset time period.
And step 404, determining a corresponding target frame rate according to the target average difference value and a preset corresponding relation.
The preset corresponding relation comprises a corresponding relation between a pre-established average difference value and a frame rate, and the frame rate comprises a drawing frame rate, a synthesis frame rate and a refreshing frame rate.
And 405, controlling the mobile terminal to execute corresponding layer drawing, layer composition and screen refreshing operation according to the target frame rate.
The display control method of the mobile terminal provided by the embodiment of the invention can realize more targeted determination of the change condition of the display picture by introducing the region of interest, can more accurately and dynamically adjust the operations of drawing the layer, synthesizing the layer and refreshing the screen, and further optimizes the display control of the mobile terminal.
Fig. 7 is a block diagram of a display control apparatus of a mobile terminal according to an embodiment of the present invention, where the apparatus may be implemented by software and/or hardware, and is generally integrated in the mobile terminal, and may perform display control by executing a display control method of the mobile terminal. As shown in fig. 7, the apparatus includes:
a difference value obtaining module 701, configured to obtain a difference value between a current display frame and a previous display frame in a first preset time period, where the difference value is related to a preset parameter;
an average value calculating module 702, configured to calculate an average value of the obtained difference values, so as to obtain a target average difference value corresponding to the first preset time period;
a target frame rate determining module 703, configured to determine a corresponding target frame rate according to the target average difference value and a preset corresponding relationship, where the preset corresponding relationship includes a preset corresponding relationship between an average difference value and a frame rate, and the frame rate includes at least one of a rendering frame rate, a composite frame rate, and a refresh frame rate;
and the display control module 704 is configured to control the mobile terminal to perform corresponding layer drawing, layer composition, or screen refreshing operation according to the target frame rate.
The display control device of the mobile terminal provided by the embodiment of the invention can dynamically determine the target frame rate according to the change condition of the display picture and optimize the display control of the mobile terminal.
Optionally, the target frame rate determining module includes:
a target interval determining unit for determining a target interval range corresponding to the target average difference value;
and the target frame rate determining unit is used for determining the corresponding target frame rate according to the target interval range and a preset corresponding relation, wherein the preset corresponding relation comprises a preset corresponding relation between the interval range and the frame rate.
Optionally, the preset corresponding relationship satisfies the following formula:
Y=aX+b
wherein, Y is the frame rate, X is the average difference value, a is the first predetermined coefficient, and b is the second predetermined coefficient.
Optionally, the difference value obtaining module includes:
a region-of-interest determining unit for determining a region of interest in the display screen;
the difference value acquisition unit is used for acquiring the difference value of the interested area in the current display picture and the corresponding interested area in the previous frame of display picture relative to the preset parameters in a first preset time period.
Optionally, the region of interest determining unit is configured to:
determining a region of interest in a display screen according to received input operation of a user based on a screen of the mobile terminal, wherein the input operation comprises touch input operation or eye focus input operation.
The embodiment of the invention provides a mobile terminal, and the display control device of the mobile terminal provided by the embodiment of the invention can be integrated in the mobile terminal. Fig. 8 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention. As shown in fig. 8, the mobile terminal may include: a housing (not shown), a memory 801, a Central Processing Unit (CPU) 802 (also called a processor, hereinafter referred to as CPU), a circuit board (not shown), and a power circuit (not shown). The circuit board is arranged in a space enclosed by the shell; the CPU802 and the memory 801 are provided on the circuit board; the power supply circuit is used for supplying power to each circuit or device of the mobile terminal; the memory 801 is used for storing executable program codes; the CPU802 runs a program corresponding to the executable program code by reading the executable program code stored in the memory 801, to execute:
acquiring a difference value of a current display picture and a previous frame display picture relative to a preset parameter in a first preset time period;
calculating an average value of the obtained difference values to obtain a target average difference value corresponding to the first preset time period;
determining a corresponding target frame rate according to the target average difference value and a preset corresponding relation, wherein the preset corresponding relation comprises a preset corresponding relation between the average difference value and a frame rate, and the frame rate comprises at least one of a drawing frame rate, a synthesis frame rate and a refreshing frame rate;
and controlling the mobile terminal to execute corresponding layer drawing, layer composition or screen refreshing operation according to the target frame rate.
The mobile terminal further includes: peripheral interface 803, RF (Radio Frequency) circuitry 805, audio circuitry 806, speakers 811, power management chip 808, input/output (I/O) subsystem 809, touch screen 812, other input/control devices 810, and external port 804, which communicate over one or more communication buses or signal lines 807.
It should be understood that the illustrated mobile terminal 800 is merely one example of a mobile terminal and that the mobile terminal 800 may have more or fewer components than shown, may combine two or more components, or may have a different configuration of components. The various components shown in the figures may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits.
The following describes in detail the mobile terminal for implementing display control according to the embodiment, where the mobile terminal is a mobile phone as an example.
A memory 801, the memory 801 being accessible by the CPU802, the peripheral interface 803, and the like, the memory 801 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other volatile solid state storage devices.
A peripheral interface 803, said peripheral interface 803 allowing input and output peripherals of the device to be connected to the CPU802 and the memory 801.
I/O subsystem 809, which I/O subsystem 809 may connect input and output peripherals on the device, such as touch screen 812 and other input/control devices 810, to peripheral interface 803. The I/O subsystem 809 may include a display controller 8091 and one or more input controllers 8092 for controlling other input/control devices 810. Where one or more input controllers 8092 receive electrical signals from or transmit electrical signals to other input/control devices 810, other input/control devices 810 may include physical buttons (push buttons, rocker buttons, etc.), dials, slide switches, joysticks, click wheels. It is worth noting that the input controller 8092 may be connected to any of the following: a keyboard, an infrared port, a USB interface, and a pointing device such as a mouse.
A touch screen 812, which touch screen 812 is an input interface and an output interface between the user terminal and the user, displays visual output to the user, which may include graphics, text, icons, video, and the like.
The display controller 8091 in the I/O subsystem 809 receives electrical signals from the touch screen 812 or sends electrical signals to the touch screen 812. The touch screen 812 detects a contact on the touch screen, and the display controller 8091 converts the detected contact into an interaction with a user interface object displayed on the touch screen 812, that is, implements a human-computer interaction, and the user interface object displayed on the touch screen 812 may be an icon for running a game, an icon networked to a corresponding network, or the like. It is worth mentioning that the device may also comprise a light mouse, which is a touch sensitive surface that does not show visual output, or an extension of the touch sensitive surface formed by the touch screen.
The RF circuit 805 is mainly used to establish communication between the mobile phone and the wireless network (i.e., the network side), and implement data reception and transmission between the mobile phone and the wireless network. Such as sending and receiving short messages, e-mails, etc. In particular, the RF circuitry 805 receives and transmits RF signals, also referred to as electromagnetic signals, which the RF circuitry 805 converts to or from electrical signals, and communicates with communication networks and other devices over. RF circuitry 805 may include known circuitry for performing these functions including, but not limited to, an antenna system, an RF transceiver, one or more amplifiers, a tuner, one or more oscillators, a digital signal processor, a CODEC (CODEC) chipset, a Subscriber Identity Module (SIM), and so forth.
The audio circuit 806 is mainly used to receive audio data from the peripheral interface 803, convert the audio data into an electric signal, and transmit the electric signal to the speaker 811.
The speaker 811 is used to convert the voice signal received by the handset from the wireless network through the RF circuit 805 into sound and play the sound to the user.
And the power management chip 808 is used for supplying power and managing power to the hardware connected with the CPU802, the I/O subsystem and the peripheral interface.
The mobile terminal provided by the embodiment of the invention can dynamically determine the target frame rate according to the change condition of the display picture, and optimize the display control of the mobile terminal.
The display control device of the mobile terminal and the mobile terminal provided in the above embodiments can execute the display control method of the mobile terminal provided in any embodiment of the present invention, and have corresponding functional modules and beneficial effects for executing the method. For details of the mobile terminal provided in any of the embodiments of the present invention, reference may be made to the display control method of the mobile terminal, which is not described in detail in the above embodiments.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (9)

1. A display control method of a mobile terminal, comprising:
acquiring a difference value of a current display picture and a previous frame display picture relative to a preset parameter in a first preset time period;
calculating an average value of the obtained difference values to obtain a target average difference value corresponding to the first preset time period;
determining a corresponding target frame rate according to the target average difference value and a preset corresponding relation, wherein the preset corresponding relation comprises a preset corresponding relation between the average difference value and a frame rate, and the frame rate comprises at least one of a drawing frame rate, a synthesis frame rate and a refreshing frame rate; the drawing frame rate, the synthesis frame rate and the refreshing frame rate are mutually independent, and different signal frequency combinations are selected according to different display scenes;
controlling the mobile terminal to execute corresponding layer drawing, layer composition or screen refreshing operation according to the target frame rate;
acquiring a difference value of a current display picture and a previous frame display picture related to a preset parameter in a first preset time period, wherein the difference value comprises the following steps:
determining an interested area in a display picture, identifying a target display scene category corresponding to a current display picture, determining a corresponding target division rule according to the target scene category, dividing the current display picture and a previous frame display picture into a plurality of areas with preset number according to the target division rule, and determining the interested area from the plurality of areas;
and acquiring a difference value of the interested area in the current display picture and the corresponding interested area in the previous frame of display picture in relation to the preset parameter in a first preset time period.
2. The method of claim 1, wherein determining the corresponding target frame rate according to the target average difference value and a preset correspondence, wherein the preset correspondence comprises a pre-established correspondence between average difference values and frame rates, comprises:
determining a target interval range corresponding to the target average difference value;
and determining a corresponding target frame rate according to the target interval range and a preset corresponding relation, wherein the preset corresponding relation comprises a preset corresponding relation between the interval range and the frame rate.
3. The method according to claim 1, wherein the preset correspondence satisfies the following formula:
Y=aX+b
wherein, Y is the frame rate, X is the average difference value, a is the first predetermined coefficient, and b is the second predetermined coefficient.
4. The method of claim 1, wherein the determining a region of interest in a display comprises:
determining a region of interest in a display screen according to received input operation of a user based on a screen of the mobile terminal, wherein the input operation comprises touch input operation or eye focus input operation.
5. A display control apparatus of a mobile terminal, comprising:
the difference value acquisition module is used for acquiring the difference value of the current display picture and the previous frame display picture relative to the preset parameters in a first preset time period;
the average value calculating module is used for calculating the average value of the acquired difference values to obtain a target average difference value corresponding to the first preset time period;
a target frame rate determining module, configured to determine a corresponding target frame rate according to the target average difference value and a preset corresponding relationship, where the preset corresponding relationship includes a preset corresponding relationship between an average difference value and a frame rate, and the frame rate includes at least one of a rendering frame rate, a composite frame rate, and a refresh frame rate; the drawing frame rate, the synthesis frame rate and the refreshing frame rate are different, and different signal frequency combinations are selected according to different requirements;
the display control module is used for controlling the mobile terminal to execute corresponding layer drawing, layer composition or screen refreshing operation according to the target frame rate;
the difference value acquisition module comprises:
the device comprises an interested region determining unit, a display unit and a display unit, wherein the interested region determining unit is used for determining an interested region in a display picture, identifying a target display scene category corresponding to a current display picture, determining a corresponding target division rule according to the target scene category, dividing the current display picture and a previous frame display picture into a plurality of regions with preset number according to the target division rule, and determining the interested region from the plurality of regions;
the difference value acquisition unit is used for acquiring the difference value of the interested area in the current display picture and the corresponding interested area in the previous frame of display picture relative to the preset parameters in a first preset time period.
6. The apparatus of claim 5, wherein the target frame rate determining module comprises:
a target interval determining unit for determining a target interval range corresponding to the target average difference value;
and the target frame rate determining unit is used for determining the corresponding target frame rate according to the target interval range and a preset corresponding relation, wherein the preset corresponding relation comprises a preset corresponding relation between the interval range and the frame rate.
7. The apparatus of claim 5, wherein the predetermined correspondence satisfies the following formula:
Y=aX+b
wherein, Y is the frame rate, X is the average difference value, a is the first predetermined coefficient, and b is the second predetermined coefficient.
8. The apparatus of claim 5, wherein the region of interest determination unit is configured to:
determining a region of interest in a display screen according to received input operation of a user based on a screen of the mobile terminal, wherein the input operation comprises touch input operation or eye focus input operation.
9. A mobile terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
acquiring a difference value of a current display picture and a previous frame display picture relative to a preset parameter in a first preset time period;
calculating an average value of the obtained difference values to obtain a target average difference value corresponding to the first preset time period;
determining a corresponding target frame rate according to the target average difference value and a preset corresponding relation, wherein the preset corresponding relation comprises a preset corresponding relation between the average difference value and a frame rate, and the frame rate comprises at least one of a drawing frame rate, a synthesis frame rate and a refreshing frame rate; the drawing frame rate, the synthesis frame rate and the refreshing frame rate are mutually independent, and different signal frequency combinations are selected according to different display scenes;
controlling the mobile terminal to execute corresponding layer drawing, layer composition or screen refreshing operation according to the target frame rate;
acquiring a difference value of a current display picture and a previous frame display picture related to a preset parameter in a first preset time period, wherein the difference value comprises the following steps:
determining an interested area in a display picture, identifying a target display scene category corresponding to a current display picture, determining a corresponding target division rule according to the target scene category, dividing the current display picture and a previous frame display picture into a plurality of areas with preset number according to the target division rule, and determining the interested area from the plurality of areas;
and acquiring a difference value of the interested area in the current display picture and the corresponding interested area in the previous frame of display picture in relation to the preset parameter in a first preset time period.
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