CN104156189B - A kind of method and device of display screen switching at runtime display pattern - Google Patents

Abstract

The invention belongs to the technical field of display screens, and provides a method and a device for dynamically switching display modes of a display screen. By adding a flag bit to the display screen supporting the video mode and the command mode, the flag bit is used as a sign of switching between the video mode and the command mode. In the process of starting the display screen, at first the display screen is initialized in the microkernel LK; after the initialization of the display screen is completed, the flag bit of the display screen is read; finally, the corresponding display mode is executed according to the flag bit; thereby realizing In order to dynamically switch the display mode of the display screen by reading the flag bit, so that when one of the display modes of the same model is damaged, it can automatically switch to another display mode, which achieves a reasonable use of the display screen and reduces the The production cost of the display.

Description

Method and device for dynamically switching display modes of a display screen

technical field

The invention belongs to the technical field of display screens, and in particular relates to a method and a device for dynamically switching display modes of a display screen.

Background technique

The display mode of the display screen of the existing mobile phone is generally a video mode and a cmd mode.

The corresponding Chinese name of the video mode is video mode. In this mode, the mobile phone does not need to use a dedicated data signal to transmit synchronization information. The control signal and RGB data are directly transmitted through the MIPI bus in the form of a message, which requires the mobile phone CPU to continuously transmit refresh data to the display. The control logic of the video mode is simple and the cost is low, but the power consumption is relatively large.

The corresponding Chinese name of the cmd mode is command mode. In this mode, the MIPI bus controller uses display command messages to send pixel stream data to the display. The display has at least two full-frame-length frame buffers to store received pixel stream data. After the pixel stream data is stored in the frame buffer, the timing controller of the display screen will read the data from the frame buffer, and automatically display the read data on the screen, and the MIPI bus The controller does not need to refresh the display periodically. The control logic of the cmd mode is relatively complicated, and at the same time, the display screen needs to be provided with a frame buffer, so the cost of executing the cmd mode is high, but its power consumption is low.

However, for the same model of mobile phone displays, either they are all set to video mode or cmd mode, and switching between the two display modes cannot be performed; although some models of mobile phone displays can support video mode and cmd mode at the same time However, due to production process problems, it is easy to cause one of the modes to fail to work normally, because the switch between the two display modes cannot be performed, so that the entire display screen must be scrapped, thereby increasing the production cost.

Contents of the invention

The object of the present invention is to provide a method and device for dynamically switching display modes of a display screen, so as to realize that the same type of display screen can work in different display modes as required, and reduce the production cost of the display screen.

The present invention is achieved in this way, a method for dynamically switching display modes of a display screen, the method comprising:

Initialize the display screen in the microkernel LK;

After the initialization of the display screen is completed, read the flag bit of the display screen;

Execute the corresponding display mode according to the flag bit.

Further, the display mode includes a command mode and a video mode;

The execution of the corresponding display mode according to the flag bit is specifically:

judging whether the flag bit is a preset value;

If so, then receive the data to be displayed according to the command mode, and display the data to be displayed;

If not, receive the data to be displayed according to the video mode, and display the data to be displayed.

Further, the method also includes:

When the video mode of the display is not available, set the flag of the display to 1, so that the display will execute the command mode at the next startup; when the command mode of the display is not available, set the flag of the display to 0, so that The display performs video mode on the next boot;

or

When receiving the setting command for the display mode, according to the selection command of the display mode input by the user, set the flag bit of the display screen to 1 or 0, so that the display screen will execute the command mode or video mode when it is started next time.

Further, said initializing the display screen in the microkernel LK includes:

Power on the display in the microkernel LK;

After the display is powered on, reset the display;

And set the MIPI clock of the display screen, so that the display screen transmits data according to the MIPI clock.

Further, after executing the corresponding display mode according to the flag bit, it also includes:

Detect the remaining power value;

When the remaining power value is less than the preset threshold, the flag bit of the display screen is set to 1, so that the display screen executes the command mode at the next startup.

A second aspect of the present invention provides a device for dynamically switching display modes of a display screen, the device comprising: .

The initialization module is used to initialize the display screen in the microkernel LK;

The reading module is used to read the flag bit of the display screen after the initialization of the display screen is completed;

An execution module, configured to execute a corresponding display mode according to the flag bit.

Further, the display mode includes a command mode and a video mode;

The execution module is specifically used for:

Judging whether the flag bit of the display screen is a preset value;

If so, then receive the data to be displayed according to the command mode, and display the data to be displayed;

Otherwise, receive the data to be displayed according to the video mode, and display the data to be displayed.

Further, the device also includes a first setting module; the first setting module is used for:

When the video mode of the display is not available, set the flag of the display to 1, so that the display will execute the command mode at the next startup; when the command mode of the display is not available, set the flag of the display to 0, so that The display performs video mode on the next boot;

or

When receiving the setting command for the display mode, according to the selection command of the display mode input by the user, set the flag bit of the display screen to 1 or 0, so that the display screen will execute the command mode or video mode when it is started next time.

Further, the initialization module is specifically used for:

Power on the display in the microkernel LK;

After the display is powered on, reset the display;

And set the MIPI clock of the display screen, so that the display screen transmits data according to the MIPI clock.

Further, the device also includes

The second setting module is used to detect the remaining power value; and when the remaining power value is less than a preset threshold, set the flag bit of the display screen to 1, so that the display screen will execute the command mode when it is started next time.

Compared with the prior art, the present invention adds a flag bit to the display screen supporting the video mode and the command mode, and uses the flag bit as a sign of switching between the video mode and the command mode. In the process of starting the display screen, at first the display screen is initialized in the microkernel LK; after the initialization of the display screen ends, the flag bit of the display screen is read; finally, the corresponding display mode is executed according to the flag bit; thereby realizing In order to dynamically switch the display mode of the display screen by reading the flag bit, when one of the display modes of the same model is damaged, it can automatically switch to another display mode, which achieves a reasonable use of the display screen and reduces the display capacity. Screen production costs.

Description of drawings

Fig. 1 is a first implementation flowchart of a method for dynamically switching display modes of a display screen provided by Embodiment 1 of the present invention;

Fig. 2 is a second implementation flowchart of the method for dynamically switching display modes of a display screen provided by Embodiment 2 of the present invention;

FIG. 3 is a structural diagram of a device for dynamically switching display modes of a display screen provided by Embodiment 3 of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In the present invention, a flag bit is added to the display screen supporting the video mode and the command mode, and the flag bit is used as a mark for switching between the video mode and the command mode. In the process of starting the display screen, at first the display screen is initialized in the microkernel LK; after the initialization of the display screen ends, the flag bit of the display screen is read; finally, the corresponding display mode is executed according to the flag bit; thereby realizing In order to dynamically switch the display mode of the display screen by reading the flag bit, when one display mode of the same type of display screen is damaged, it can automatically switch to another display mode, which achieves a reasonable use of the display screen and reduces the The production cost of the display.

Embodiment one

Fig. 1 shows the first implementation flow of the method for dynamically switching the display mode of the display screen provided by Embodiment 1 of the present invention. For the convenience of description, only the parts related to this amplifier are shown.

In this embodiment, the method is applied to a display screen that simultaneously supports multiple display modes, and the display screen is a display screen of a smart terminal, and the smart terminal may be a mobile phone, an ipad, a computer, and the like.

As shown in Figure 1, the method includes:

In step S101, the display screen is initialized in the microkernel LK.

In this embodiment, the display mode switching of the display screen is performed during the start-up process of the display screen. During the startup process of the display screen, the display screen should be initialized in the microkernel LK at first. The initialization includes powering on and resetting the display screen and configuring the MIPI clock.

In step S102, after the initialization of the display screen is completed, the flag bit of the display screen is read.

In this embodiment, after the initialization process of the display screen is completed, the smart terminal sends a command to the display screen to read the value on the flag register of the display screen. The flag bit register is a register added in the driver IC of the display screen. Each driver IC manufacturer can add such a flag register; the value of the flag register can be fixedly written when leaving the factory, or can be dynamically set during use.

As an implementation example of the present invention, the display screen supports video mode and command mode at the same time. When the display screen needs to receive and display data to be displayed in the command mode, the value of the flag bit register is set to 1; When using the video mode to receive and display the data to be displayed, set the value of the flag bit register to 0.

In step S103, a corresponding display mode is executed according to the flag bit.

In this embodiment, when the value of the flag bit register of the read display screen is 1, then start the display screen with command mode, receive and display the data to be displayed; When the value of is 0, the display screen is started in video mode, and the data to be displayed is received and displayed; thus, the display mode of the display screen can be determined by reading the flag bit.

During the start-up process of the display screen, if the intelligent terminal cannot start the display screen through the command mode to receive and display the data to be displayed (that is, when the command mode cannot work normally), the value of the flag bit register is automatically modified to 0, In order to make the display screen start in video mode during the next startup process; if the smart terminal cannot start the display screen in video mode to receive and display the data to be displayed (that is, when the video mode cannot work normally), the flag will be automatically set to The value of the register is modified to 1, so that the display will start in command mode during the next startup. By setting the value of the flag bit register, the display mode of the display screen can be dynamically switched, so that when one of the display modes of the same type of display screen is damaged, it can be switched to another display mode, which achieves a reasonable use of the display screen and solves the problem of The existing display screen supporting multiple display modes has the problem that the entire display screen will be scrapped if one of the display modes is damaged, thereby reducing the production cost of the display screen.

In this embodiment, by adding a flag bit to the display screen supporting the video mode and the command mode, the flag bit is used as an indication of switching between the video mode and the command mode. In the process of starting the display screen, at first the display screen is initialized in the microkernel LK; after the initialization of the display screen ends, the flag bit of the display screen is read; finally, the corresponding display mode is executed according to the flag bit; thereby realizing In order to dynamically switch the display mode of the display screen by reading the flag bit, when one display mode of the same type of display screen is damaged, it can automatically switch to another display mode, which achieves a reasonable use of the display screen and reduces the The production cost of the display.

Embodiment two

FIG. 2 shows the second implementation flow of the method for dynamically switching display modes of the display screen provided by Embodiment 2 of the present invention. For the convenience of description, only the parts related to the present invention are shown.

In this embodiment, the method is applied to a display screen that simultaneously supports multiple display modes. The display mode includes a video mode and a command mode, and the display screen is a display screen of an intelligent terminal, and the intelligent terminal is preferably a mobile phone.

As shown in Figure 2, the method includes:

In step S201, the display screen is initialized in the microkernel LK.

In this embodiment, the display mode switching of the display screen is performed during the start-up process of the display screen. During the startup process of the display screen, the display screen should be initialized in the microkernel LK at first. The initialization includes powering on and resetting the display screen and configuring the MIPI clock. Most of the existing display screens are MIPI standard interfaces. MIPI is the abbreviation of Mobile Industry Processor Interface, and the Chinese name is Mobile Industry Processor Interface. The display screen needs a strict clock signal, and the transmission of specific data needs to be completed within a specific clock cycle. Therefore, it is necessary to set a MIPI clock for the MIPI interface, so that the display screen transmits data according to the MIPI clock. The MIPI clocking is accomplished by writing registers into the MDP. Among them, MDP is the abbreviation of mobile display process, which is a processing module related to display.

In step S202, after the initialization of the display screen is completed, the flag bit of the display screen is read.

In this embodiment, after the initialization process of the display screen is completed, the smart terminal sends a command to the display screen to read the value of the flag bit register in the display screen driver IC.

In step S203, it is determined whether the flag of the display screen is a preset value.

In this embodiment, if the command mode is set as the default display mode and the corresponding flag bit is 1, then 1 is used as the default value of the flag bit. Judging whether the flag bit of the display screen is a preset value, that is, judging whether to start the display screen in a default display mode. If yes, execute step S204; otherwise, execute step S205.

In step S204, the data to be displayed is received according to the command mode, and the data to be displayed is displayed.

In the command mode, the CPU of the intelligent terminal uses the display command message to send the data to be displayed to the display screen according to the MIPI clock. The data to be displayed is fetched from the frame buffer, and the fetched data to be displayed is automatically displayed on the screen of the display screen.

In step S205, the data to be displayed is received according to the video mode, and the data to be displayed is displayed.

In the video mode, the CPU of the smart terminal continuously refreshes the data to be displayed on the display screen. The display screen continuously receives the data to be displayed, and automatically displays the data to be displayed on the screen of the display screen.

Further, in order to facilitate the user to modify the display mode of the display screen and meet the needs of different users, this embodiment also includes:

When the video mode of the display is not available, set the flag of the display to 1, so that the display will execute the command mode at the next startup; when the command mode of the display is not available, set the flag of the display to 0, so that The display performs video mode on the next boot;

or

When receiving the setting command for the display mode, according to the selection command of the display mode input by the user, set the flag bit of the display screen to 1 or 0, so that the display screen will execute the command mode or video mode when it is started next time.

During the start-up process of the display screen, if the intelligent terminal cannot start the display screen through the command mode to display the data to be displayed (that is, when the command mode cannot work normally), the value of the flag bit register is automatically modified to 0, so that the display The screen will start in video mode during the next startup process; if the smart terminal cannot start the display in video mode to display the data to be displayed (that is, when the video mode cannot work normally), the value of the flag bit register will be automatically modified to 1 , so that the display starts in command mode during the next boot sequence.

In practical applications, a display mode setting button, a video mode selection button and a command mode selection button may be preset. When receiving the setting instruction to the display mode input by the user by clicking the display mode setting button, according to the selection instruction to the display mode input by the user clicking the command mode selection button or the video mode selection button, the setting of the display screen is set. Flag bit register is 1 or 0.

Further, since the power consumption of the command mode is lower than that of the video mode, in order to save the power of the mobile phone, when both the video mode and the command mode are available, the corresponding flag bit is executed. After the display mode also include:

In step S206, the remaining power value is detected.

Detect the remaining power value of the mobile phone, and record the detected remaining power value.

In step S207, when the remaining power value is less than the preset threshold, the flag bit of the display screen is set to 1, so that the display screen executes the command mode at the next startup.

Preferably, the preset threshold is 30% of the remaining power. When the remaining power value is less than 30%, the flag bit of the display screen is set to 1, and the display screen is controlled to restart, so that the display screen receives the data to be displayed in command mode in the next startup, and displays the data to be displayed The data.

By adding a flag bit to the display screen supporting the video mode and the command mode, the flag bit is used as a sign of switching between the video mode and the command mode. In the process of starting the display screen, at first the display screen is initialized in the microkernel LK; after the initialization of the display screen ends, the flag bit of the display screen is read; finally, the corresponding display mode is executed according to the flag bit; thereby realizing In order to dynamically switch the display mode of the display screen by reading the flag bit, when one display mode of the same type of display screen is damaged, it can automatically switch to another display mode, so as to achieve a reasonable use of the display screen and reduce the display capacity. The production cost of the screen; further, this embodiment can also automatically set the display mode of the display screen to the command mode when the remaining power value is less than the preset threshold, so that the display screen will automatically switch to the command mode when it is started next time, so as to reduce power consumption of the mobile phone.

Embodiment Three

FIG. 3 shows the composition and structure of the device for dynamically switching display modes of a display screen provided by Embodiment 3 of the present invention. For ease of illustration, only the parts relevant to the present invention are shown.

As shown in Figure 3, the device includes:

The initialization module 31 is used to initialize the display screen in the microkernel LK.

Further, the initialization module 31 is specifically used for:

Power on the display in the microkernel LK;

After the display is powered on, reset the display;

And set the MIPI clock of the display screen, so that the display screen transmits data according to the MIPI clock.

The reading module 32 is configured to read the flag bits of the display screen after the initialization of the display screen is completed.

The execution module 33 is configured to execute a corresponding display mode according to the flag bit.

Further, the display mode includes a command mode and a video mode;

The execution module 33 is specifically used for:

Judging whether the flag bit of the display screen is a preset value;

If so, then receive the data to be displayed according to the command mode, and display the data to be displayed;

Otherwise, receive the data to be displayed according to the video mode, and display the data to be displayed.

Further, in order to improve the utilization rate of the display screen and facilitate the user to modify the display mode of the display screen to meet the needs of different users, the device further includes a first setting module 34;

The first setting module 34 is used for:

When the video mode of the display is not available, set the flag of the display to 1, so that the display will execute the command mode at the next startup; when the command mode of the display is not available, set the flag of the display to 0, so that The display performs video mode on the next boot;

or

When receiving the setting command for the display mode, according to the selection command of the display mode input by the user, set the flag bit of the display screen to 1 or 0, so that the display screen will execute the command mode or video mode when it is started next time.

Further, since the power consumption of the command mode is lower than that of the video mode, in order to save the power of the mobile phone, the device also includes

The second setting module 35 is used to detect the remaining power value; and when the remaining power value is less than a preset threshold, set the flag bit of the display screen to 1, so that the display screen will execute the command mode when it is started next time.

In this embodiment, by adding a flag bit to the display screen supporting the video mode and the command mode, the flag bit is used as an indication of switching between the video mode and the command mode. In the process of starting the display screen, at first the display screen is initialized in the microkernel LK; after the initialization of the display screen ends, the flag bit of the display screen is read; finally, the corresponding display mode is executed according to the flag bit; thereby realizing In order to dynamically switch the display mode of the display screen by reading the flag bit, when one display mode of the same type of display screen is damaged, it can automatically switch to another display mode, so as to achieve a reasonable use of the display screen and reduce the display capacity. The production cost of the screen; further, this embodiment can also automatically set the display mode of the display screen to the command mode when the remaining power value is less than the preset threshold, so that the display screen will automatically switch to the command mode when it is started next time, so as to reduce power consumption of the mobile phone.

Those of ordinary skill in the art can also understand that all or part of the steps in the method of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, so The storage medium mentioned above includes ROM/RAM, magnetic disk, optical disk, etc.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For example, each module is only divided according to the functional logic, but it is not limited to the above-mentioned division, as long as the corresponding function can be realized; in addition, the specific names of each functional module are only for the convenience of distinguishing each other, and are not used to limit this protection scope of the invention.

Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (8)

1. A method for dynamically switching display modes of a display screen, characterized in that, the method is to switch display modes during the startup process of the display screen, comprising: Initialize the display screen in the microkernel LK; After the initialization of the display screen is completed, read the flag bit of the display screen; Execute a corresponding display mode according to the flag bit; The method of reading the flag bits of the display screen includes: the smart terminal sends a command to the display screen to read the value on the flag bit register in the display driver IC, and the value of the flag bit register is fixedly written when leaving the factory. value, or a value set dynamically during use; Described display screen is initialized in microkernel LK comprises: Power on the display in the microkernel LK; After the display is powered on, reset the display; And set the MIPI clock of the display so that the display transmits data according to the MIPI clock; The method also includes: A display mode setting button, a video mode selection button, and a command mode selection button are preset, and when the user clicks the setting instruction of the display mode input by clicking the display mode setting button, according to the user clicking the command mode selection button or The instruction for selecting the display mode of the display screen inputted through the video mode selection button sets the flag bit register of the display screen to 1 or 0. 2. The method for dynamically switching the display mode of the display screen according to claim 1, wherein the display mode comprises a command mode and a video mode; The execution of the corresponding display mode according to the flag bit is specifically: judging whether the flag bit is a preset value; If so, then receive the data to be displayed according to the command mode, and display the data to be displayed; If not, receive the data to be displayed according to the video mode, and display the data to be displayed. 3. The method for dynamically switching display modes of a display screen according to claim 1 or 2, wherein the method further comprises: When the video mode of the display is not available, set the flag of the display to 1, so that the display will execute the command mode at the next startup; when the command mode of the display is not available, set the flag of the display to 0, so that The display performs video mode on the next startup. 4. The method for dynamically switching the display mode of the display screen according to claim 1, characterized in that, after executing the corresponding display mode according to the flag bit, the method further comprises: Detect the remaining power value; When the remaining power value is less than the preset threshold, the flag bit of the display screen is set to 1, so that the display screen executes the command mode at the next startup. 5. A device for dynamically switching display modes of a display screen, characterized in that, the device performs display mode switching during the start-up process of the display screen, comprising: The initialization module is used to initialize the display screen in the microkernel LK; The reading module is used to read the flag bit of the display screen after the initialization of the display screen is completed; An execution module, configured to execute a corresponding display mode according to the flag bit; The way that the reading module reads the flag bit of the display screen includes: the intelligent terminal sends a command to the display screen to read the value on the flag bit register in the display driver IC, and the value of the flag bit register is at the factory. Fixed written value, or dynamically set value during use; The initialization module is specifically used for: Power on the display in the microkernel LK; After the display is powered on, reset the display; And set the MIPI clock of the display so that the display transmits data according to the MIPI clock; The device also includes: The first setting module is used to pre-set a display mode setting button, a video mode selection button and a command mode selection button. The user clicks the command mode selection button or the video mode selection button to input the selection command for the display mode of the display screen, and sets the flag bit register of the display screen to 1 or 0. 6. The device for dynamically switching display modes of the display screen according to claim 5, wherein the display modes include command mode and video mode; The execution module is specifically used for: Judging whether the flag bit of the display screen is a preset value; If so, then receive the data to be displayed according to the command mode, and display the data to be displayed; Otherwise, receive the data to be displayed according to the video mode, and display the data to be displayed. 7. The device for dynamically switching display modes of the display screen according to claim 5 or 6, wherein the first setting module is used for: When the video mode of the display is not available, set the flag of the display to 1, so that the display will execute the command mode at the next startup; when the command mode of the display is not available, set the flag of the display to 0, so that The display performs video mode on the next startup. 8. The device for dynamically switching display modes of the display screen according to claim 5, characterized in that the device further comprises The second setting module is used to detect the remaining power value; and when the remaining power value is less than a preset threshold, set the flag bit of the display screen to 1, so that the display screen will execute the command mode when it is started next time.