CN106937371B

CN106937371B - Method and device for saving electricity by switching background gray scales and mobile terminal

Info

Publication number: CN106937371B
Application number: CN201710142356.2A
Authority: CN
Inventors: 郑志勇; 易永鹏; 苟生俊; 袁晓日; 甘高亭; 杨海; 彭德良
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2017-03-10
Filing date: 2017-03-10
Publication date: 2020-05-12
Anticipated expiration: 2037-03-10
Also published as: CN106937371A; WO2018161591A1

Abstract

The embodiment of the invention discloses a method and a device for saving electricity by switching background gray scales and a mobile terminal. The method comprises the following steps: if the backlight control function is in an on state, detecting the current gray scale of the current display image in the screen; if the current gray level is higher than a first gray level threshold value, reducing the gray level of the screen background image so as to update the screen display picture; and adjusting the gray scale and the screen backlight brightness of the updated screen display picture based on the backlight control function. The embodiment of the invention can improve the reduction adjustment space of the screen backlight brightness, thereby reducing the power consumption of the terminal.

Description

Method and device for saving electricity by switching background gray scales and mobile terminal

Technical Field

The invention relates to the field of electronic equipment, in particular to a method and a device for saving power by switching background gray scales and a mobile terminal.

Background

With the rapid development of mobile communication technology and computer technology, mobile terminals such as smart phones and tablet computers have become indispensable communication tools in people's lives. How to consider the low power consumption requirement of the terminal and the image quality of the screen display is a problem which needs to be solved urgently in the field of image processing.

The backlight Control function, such as a Content Adaptive Brightness Control (CABC) function, is used to adjust the relationship between the gray-scale value of an image and the screen backlight Brightness according to the image Content displayed on the terminal screen, so that the display quality of the image can be maintained while the screen backlight Brightness is effectively reduced. However, limited by the image content displayed on the screen, the power saving effect based on the backlight control function is poor at present, so that the terminal still has the problem of high power consumption.

Disclosure of Invention

The embodiment of the invention provides a method and a device for saving electricity by switching background gray scales and a mobile terminal, which can reduce the power consumption of the terminal.

In a first aspect, an embodiment of the present invention provides a method for saving power by switching a background gray level, including:

if the backlight control function is in an on state, detecting the current gray scale of the current display image in the screen;

if the current gray scale is in the first gray scale threshold value, reducing the gray scale of the screen background image so as to update the screen display picture;

and adjusting the gray scale and the screen backlight brightness of the updated screen display picture based on the backlight control function.

In a second aspect, an embodiment of the present invention provides an apparatus for saving power by switching a background gray level, including:

the image gray scale detection module is used for detecting the current gray scale of the current display image in the screen if the backlight control function is in an on state;

the screen gray scale reduction module is used for reducing the gray scale of the screen background image to update the screen display picture if the current gray scale is higher than a first gray scale threshold value;

and the backlight adjusting module is used for adjusting the gray scale and the screen backlight brightness of the updated screen display picture based on the backlight control function.

In a third aspect, an embodiment of the present invention provides a mobile terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the following steps when executing the computer program:

if the current gray level is higher than a first gray level threshold value, reducing the gray level of the screen background image so as to update the screen display picture;

In the embodiment of the invention, when the backlight control function is in the on state, the current gray scale of the current display image in the screen is detected, if the detected current gray scale is higher than the first gray scale threshold value, the gray scale of the background image of the screen is reduced, the gray scale improvement space of the screen display picture can be improved, and then the gray scale and the backlight brightness of the screen are adjusted based on the backlight control function. The reduction adjustment space of the screen backlight brightness can be increased, so that the power consumption of the terminal can be reduced.

Drawings

FIG. 1 is a flowchart illustrating a method for switching a background gray level to save power according to an embodiment of the present invention;

FIG. 2 is a diagram illustrating a currently displayed image according to an embodiment of the present invention;

FIG. 3 is a flowchart illustrating another method for switching background gray levels to save power according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an apparatus for saving power by switching a background gray level according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a mobile terminal provided in an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. 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 method for saving power by switching a background gray level according to an embodiment of the present invention, where the method can be executed by a device for saving power by switching a background gray level, the device can be implemented by software and/or hardware, and can be generally loaded in a mobile terminal. As shown in fig. 1, the method may include:

and step 11, detecting the current gray scale of the current display image in the screen if the backlight control function is in the on state.

Referring to fig. 2, the currently displayed image in the screen may include a background image 01 and a content layer 02, for example, the currently displayed image may be an image of an application icon interface, or other application interfaces such as an instant messaging application, a calendar, a short message, or a note.

Specifically, each currently displayed image in the screen includes a plurality of pixels, and the gray scale of each pixel may be different. After the current display image in the screen is obtained, the gray scale of each pixel of the current display image is detected, and the gray scale of each pixel is counted and processed to obtain the current gray scale of the current display image, for example, the average gray scale of each pixel in the current display image can be determined as the current gray scale of the current display image. Or determining the central area of the current display image, counting the gray scale mean value of each pixel in the central area, and obtaining the gray scale value of the central area according to the counting result to be used as the current gray scale of the current display image.

And step 12, if the current gray level is higher than the first gray level threshold value, reducing the gray level of the screen background image so as to update the screen display picture.

The light source behind each sub-pixel in the screen display can show different brightness levels, and the gray scale represents the gradation level of different brightness from the darkest to the brightest. The more the intermediate levels are, the more exquisite the picture effect can be presented. Taking an 8-bit panel (panel) as an example, it is equal to 256 luminance levels, i.e. 256 gray levels.

The first gray level threshold may be an empirical value determined by a user, such as 200 for an 8-bit panel. The first grayscale threshold may also be determined according to a history record of the backlight control function, for example, for each history image content displayed on the screen, statistics is performed on grayscale values of the history image content and screen backlight brightness adjusted on the history image based on the backlight control function, each target history image with screen backlight brightness higher than the brightness threshold is determined, and a minimum grayscale value among the grayscale values of each target history image may be used as the first grayscale threshold.

The power saving effect of the backlight control function on a dark color picture (low gray scale picture) is better than that on a light color picture (high gray scale picture), because the gray scale space of the dark color picture which can be improved is large, and the corresponding space for reducing the backlight brightness downwards is also large. Specifically, if the current gray level is higher than the first gray level threshold, the gray level of the currently displayed image has a smaller lifting space, and correspondingly, the screen backlight brightness has a smaller reduction space. By reducing the gray scale of the screen background image, the gray scale of the screen display picture comprising the screen background image and the content layer can be reduced, so that the reduction space of the screen backlight brightness can be improved.

And step 13, adjusting the gray scale and the screen backlight brightness of the updated screen display picture based on the backlight control function.

Specifically, the backlight control function has the same amplitude of gray scale improvement of the updated screen display picture as the amplitude of brightness reduction of the screen backlight, so that the brightness of the image is basically consistent before and after processing.

For example, the reducing the gray level of the screen background image may include:

selecting and updating a target background image of a screen from at least one preset power saving background image, wherein the gray scale of the power saving background image is smaller than a second gray scale threshold value, and the second gray scale threshold value is smaller than the first gray scale threshold value.

The terminal is preset with at least one power-saving background picture which is used for reducing the gray scale of the current display image in the screen. The second gray level threshold may be an empirical value determined by a user, or may be determined according to a history of the backlight control function. The gray scale of the screen background image is directly reduced through the preset power-saving background image, the reduction range of the backlight brightness of the screen can be effectively improved, the updating efficiency of the screen display image can be improved, and therefore the efficiency of switching the background gray scale to save power is improved.

For example, reducing the gray level of the screen background image may further include:

and subtracting a preset value from the gray scale of each pixel in the initial background image.

Wherein, the initial background image refers to the background image of the current display image. The preset value corresponding to the initial background image may be one, or may be a plurality of preset values, for example, the current display image is divided into a plurality of sub-regions, the gray scale mean value of each sub-region is respectively counted, and the value corresponding to the gray scale mean value of each sub-region is determined according to a mapping relation between the pre-constructed gray scale mean value and the preset value, wherein the higher the gray scale mean value in the mapping relation is, the higher the corresponding preset value is.

On the basis of the above embodiments, referring to fig. 3, in order to further improve the power saving effect, the method for switching the background gray level to save power may include:

and step 21, detecting the current gray scale of the current display image in the screen if the backlight control function is in the on state.

And step 22, determining the current gray scale level of the current gray scale.

The terminal is preset with a plurality of gray scale levels and gray scale value ranges corresponding to the gray scale levels, so that the current gray scale level to which the current gray scale belongs can be determined.

And step 23, determining a target background picture matched with the current gray scale level according to a mapping relation between a preset gray scale level and the background picture so as to update a screen display picture.

And the higher the gray scale level in the mapping relation is, the lower the gray scale of the corresponding background picture is. The higher the gray scale level is, the lower the gray scale promotion amplitude is, and in order to keep the effect of reducing the power consumption, the lower the gray scale of the background picture is.

And 24, adjusting the gray scale and the screen backlight brightness of the updated screen display picture based on the backlight control function.

Fig. 4 is a schematic structural diagram of an apparatus for switching a background gray level to save power according to an embodiment of the present invention, which may be configured in a mobile terminal. As shown in fig. 4, the specific structure of the apparatus for saving power by switching the background gray levels may include:

the image gray scale detection module 31 is configured to detect a current gray scale of a currently displayed image in the screen if the backlight control function is in an on state;

a screen gray level reducing module 32, configured to reduce a gray level of the screen background image if the current gray level is higher than a first gray level threshold, so as to update the screen display image;

the backlight adjusting module 33 is configured to adjust the gray scale and the screen backlight brightness of the updated screen display image based on the backlight control function.

Illustratively, the screen gray level reduction module 32 may be specifically configured to:

determining the current gray scale level of the current gray scale;

and determining a target background picture matched with the current gray scale level according to the mapping relation between the preset gray scale level and the background picture so as to update the screen display picture.

For example, the higher the gray level in the mapping relationship, the lower the gray level of the corresponding background picture.

The device for saving power by switching the background gray scale and the method for saving power by switching the background gray scale provided by any embodiment of the invention belong to the same invention concept, can execute the method for saving power by switching the background gray scale provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method for saving power by switching the background gray scale. For details of the technology not described in detail in this embodiment, reference may be made to the method for saving power by switching the background gray level provided in any embodiment of the present invention.

Embodiments of the present invention provide a mobile terminal that may include a memory, a processor, and a computer program stored on the memory and executable on the processor.

Fig. 5 is a schematic structural diagram of a mobile terminal provided in an embodiment of the present invention, and as shown in fig. 5, an illustrated smart phone 400 may include: memory 401, a Central Processing Unit (CPU) 402, peripheral interfaces 403, RF circuitry 405, audio circuitry 406, speakers 411, a power management chip 408, input/output (I/O) subsystems 409, other input/control devices 410, and external ports 404, which communicate via one or more communication buses or signal lines 407.

It should be understood that the illustrated smartphone 400 is only one example of a mobile terminal, and that the smartphone 400 may have more or fewer components than shown in the figures, 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 the smart phone for switching the background gray scale to save power in detail.

The memory 401: the memory 401 may be accessed by the CPU402, the peripheral interface 403, and the like, and the memory 401 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 403 which may connect input and output peripherals of the device to the CPU402 and the memory 401.

I/O subsystem 409: the I/O subsystem 409 may connect input and output peripherals on the device, such as the touch screen 402 and other input/control devices 410, to the peripheral interface 403. The I/O subsystem 409 may include a display controller 4091 and one or more input controllers 4092 for controlling other input/control devices 410. Where one or more input controllers 4092 receive electrical signals from or send electrical signals to other input/control devices 410, the other input/control devices 410 may include physical buttons (push buttons, rocker buttons, etc.), dials, slide switches, joysticks, or click wheels. It is noted that the input controller 4092 may be connected to any one of the following: a keyboard, an infrared port, a USB interface, and a pointing device such as a mouse.

The touch screen 412: the touch screen 412 is an input interface and an output interface between the user terminal and the user, and displays visual output to the user, which may include graphics, text, icons, or video, among others.

The display controller 4091 in the I/O subsystem 409 receives electrical signals from the touch screen 412 or transmits electrical signals to the touch screen 412. The touch screen 412 detects a contact on the touch screen, and the display controller 4091 converts the detected contact into an interaction with a user interface object displayed on the touch screen 412, i.e., implements a human-computer interaction, and the user interface object displayed on the touch screen 412 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 405 is mainly used to establish communication between the mobile phone and the wireless network (i.e., 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 405 receives and transmits RF signals, also referred to as electromagnetic signals, through which the RF circuitry 405 converts electrical signals to or from electromagnetic signals and communicates with communication networks and other devices. RF circuitry 405 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 chipset, a Subscriber Identity Module (SIM), and so forth.

The audio circuit 406 is mainly used to receive audio data from the peripheral interface 403, convert the audio data into an electric signal, and transmit the electric signal to the speaker 411.

The speaker 411 is used to restore the voice signal received by the mobile phone from the wireless network through the RF circuit 405 to sound and play the sound to the user.

And the power management chip 408 is used for supplying power and managing power to the hardware connected with the CPU402, the I/O subsystem and the peripheral interface.

The CPU402 provided in the embodiment of the present invention implements the following steps when executing the computer program:

The foregoing is considered as illustrative of the preferred embodiments of the 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

1. A method for saving power by switching background gray scales is characterized by comprising the following steps:

if the current gray level is higher than a first gray level threshold value, reducing the gray level of the screen background image so as to update the screen display picture; the first gray scale threshold is determined according to the history record of the backlight control function, for each history image content displayed on the screen, the gray scale value of the history image content and the screen backlight brightness adjusted by the history image based on the backlight control function are counted, each target history image with the screen backlight brightness higher than the brightness threshold is determined, and the minimum gray scale value in the gray scale values of each target history image is used as the first gray scale threshold;

and adjusting the gray scale and the screen backlight brightness of the updated screen display picture based on the backlight control function, wherein the gray scale lifting amplitude of the screen display picture is the same as the reduction amplitude of the screen backlight brightness.

2. The method of claim 1, wherein reducing the gray scale of the screen background image comprises:

3. The method of claim 2, wherein selecting and updating the target background map of the screen from at least one preset power saving background map comprises:

determining the current gray scale level of the current gray scale;

4. The method of claim 3, wherein the higher the gray level in the mapping relationship, the lower the gray level of the corresponding background picture.

5. The method of claim 1, wherein reducing the gray scale of the screen background image comprises:

6. An apparatus for saving power by switching a background gray level, comprising:

the screen gray scale reduction module is used for reducing the gray scale of the screen background image to update the screen display picture if the current gray scale is higher than a first gray scale threshold value; the first gray scale threshold is determined according to the history record of the backlight control function, for each history image content displayed on the screen, the gray scale value of the history image content and the screen backlight brightness adjusted by the history image based on the backlight control function are counted, each target history image with the screen backlight brightness higher than the brightness threshold is determined, and the minimum gray scale value in the gray scale values of each target history image is used as the first gray scale threshold;

the backlight adjusting module is used for adjusting the gray scale and the screen backlight brightness of the updated screen display picture based on the backlight control function, and the gray scale lifting amplitude of the screen display picture is the same as the reduction amplitude of the screen backlight brightness.

7. The apparatus of claim 6, wherein the grayscaling module is specifically configured to:

8. The apparatus of claim 7, wherein the grayscaling module is specifically configured to:

determining the current gray scale level of the current gray scale;

9. The apparatus of claim 8, wherein the higher the grayscale level in the mapping, the lower the grayscale of the corresponding background picture.

10. The apparatus of claim 6, wherein the grayscaling module is specifically configured to:

11. A mobile terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the computer program implements the steps of: