CN112486441A - Auxiliary screen display method and device for expanding main screen of mobile terminal - Google Patents
Auxiliary screen display method and device for expanding main screen of mobile terminal Download PDFInfo
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- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital 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
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Abstract
The invention discloses a method and a device for displaying an auxiliary screen for expanding a main screen of a mobile terminal, wherein the method comprises the following steps of S1, connecting the auxiliary screen with the main screen, and displaying a complete main screen picture; s2, after the secondary screen receives the extension stimulation signal, the display picture of the secondary screen is adjusted from the complete main screen picture to a partial main screen picture; when the display picture of the auxiliary screen is adjusted from the complete main screen picture to a partial main screen picture, whether the main screen picture is in a split screen mode is identified; if the main screen picture is not in the split screen mode, the auxiliary screen displays part of the main screen picture according to the size proportion of the main screen picture; if the main screen picture is in the split screen mode, the auxiliary screen displays and restores the picture of the split screen area in the split screen mode; compared with the prior art: the auxiliary screen is connected outside the mobile terminal to play a role in expanding the size of the mobile terminal screen, so that the user experience is improved; and the auxiliary screen can be connected with any independent mobile terminal, and the effect of expanding the size of the display screen of any mobile terminal is achieved.
Description
Technical Field
The invention relates to the field of mobile equipment display, in particular to a method and a device for displaying an auxiliary screen for expanding a main screen of a mobile terminal.
Background
The mobile terminal becomes an indispensable article in daily life; such as cell phones, tablets; the requirements of people on the use experience of the mobile terminal are higher and higher; in order to ensure the portability of the mobile terminal, the existing mobile terminal has a smaller display screen, and how to increase the size of the display screen in the use process of the mobile terminal is a problem which is always desired to be solved in the industry; in the prior art, a folding screen mobile phone is provided by a samsung mobile phone and the like, a display screen can be enlarged in the using process, but the existing folding screen technology is not mature enough, so that the method is high in cost and has a certain distance from large-scale commercial use.
Therefore, how to provide a mobile terminal with low cost and strong portability and capable of increasing the display size of the mobile terminal screen in the using process is a problem to be solved urgently in the industry.
Disclosure of Invention
Aiming at the defects in the technology, the invention provides the auxiliary screen display method and the auxiliary screen display device for expanding the main screen of the mobile terminal, which can connect the auxiliary screen outside any mobile terminal and transfer part of the display picture on the mobile terminal to the auxiliary screen for display, so that the combination of the display screen of the original mobile terminal and the auxiliary screen displays the display picture in the original mobile terminal, and the effect of expanding the size of the display screen of the mobile terminal is achieved.
In order to achieve the above objects, the present invention provides a sub screen display method for expanding a main screen of a mobile terminal, comprising,
the auxiliary screen is connected with the main screen and displays a complete picture of the main screen;
the main screen is a self-contained screen of the mobile terminal, and a display picture of the main screen is a display picture when the main screen is not connected with the auxiliary screen;
the auxiliary screen receives the expanded stimulation signal and adjusts the display picture of the auxiliary screen from the complete main screen picture to a partial main screen picture;
when the display picture of the auxiliary screen is adjusted from the complete main screen picture to a partial main screen picture, whether the main screen picture is in a split screen mode is identified; if the main screen picture is not in the split screen mode, the auxiliary screen displays part of the main screen picture according to the size proportion of the main screen picture; and if the main screen picture is in the split screen mode, the auxiliary screen displays and restores the picture of the split screen area in the split screen mode.
In a specific scheme, the secondary screen generates a corresponding control signal according to a received external touch signal; and transmitting the control signal to the mobile terminal; the mobile terminal responds to the control signal.
In a specific scheme, an auxiliary screen is connected with a mobile terminal through a type-c conversion terminal; the type-c conversion end comprises a type-c plug, a transfer end connected with the type-c plug and a video signal conversion end; the type-c plug is connected with the mobile terminal, the auxiliary screen receives the video signal transmitted by the mobile terminal through the video signal conversion terminal, and displays a corresponding display picture according to the video signal; the auxiliary screen generates a control signal and transmits the control signal to the mobile terminal through the transfer terminal.
According to the specific scheme, when the auxiliary screen displays a part of main screen picture according to the size proportion of the main screen, the mobile terminal acquires the screen size and the resolution of the auxiliary screen; and adjusting the video signal transmitted to the sub-screen according to the sizes and resolutions of the main screen and the sub-screen.
According to the specific scheme, when the auxiliary screen displays and restores the picture of the split screen area in the split screen mode, the main screen displays a visual prompt, and one split screen window in the main screen is displayed in the auxiliary screen through long-time pressing or dragging or frame selection operation selection.
In order to achieve the above object, the present invention also provides a sub-screen display device for expanding a main screen of a mobile terminal, comprising
The extended display device is connected with the main screen and used for displaying a complete main screen picture;
the main screen is a self-contained screen of the mobile terminal, and the main screen display picture refers to a display picture of the main screen when the main screen is not connected with the expansion display device;
after the expansion display device receives the expansion stimulation signal, the display picture of the expansion display device is adjusted from a complete main screen picture to a partial main screen picture.
According to the specific scheme, the expansion display device generates a corresponding control signal according to a received external touch signal and transmits the control signal to the mobile terminal; the mobile terminal responds to the control signal.
In a specific scheme, an extended display device is connected with a mobile terminal through a type-c conversion terminal; the type-c conversion end comprises a type-c plug, a transfer end connected with the type-c plug and a video signal conversion end; the type-c plug is connected with the mobile terminal, the extended display device receives the video signal transmitted by the mobile terminal through the video signal conversion terminal and displays a corresponding display picture according to the video signal; the expansion display device generates a control signal and transmits the control signal to the mobile terminal through the transfer terminal.
According to the specific scheme, when the expansion display device displays a part of main screen picture according to the size proportion of the main screen, the mobile terminal obtains the screen size and the resolution of the expansion display device; and adjusting the video signal transmitted to the extended display device according to the sizes and resolutions of the main screen and the extended display device.
According to the specific scheme, when the expansion display device displays and restores the picture of the split screen area in the split screen mode, the main screen displays the visual prompt, and one split screen window in the main screen is selected to be displayed in the expansion display device through long-time pressing or dragging or frame selection operation.
The invention has the beneficial effects that: the invention provides a secondary screen display method for expanding a main screen of a mobile terminal, which comprises the following steps that the secondary screen is connected with the main screen and displays a complete main screen picture; after the auxiliary screen receives the extension stimulation signals, whether the main screen picture is in a split screen mode is identified; if the main screen picture is not in the split screen mode, the auxiliary screen displays part of the main screen picture according to the size proportion of the main screen picture; if the main screen picture is identified to be in the split screen mode; if the main screen picture is in the split screen mode, the auxiliary screen displays and restores the picture of the split screen area in the split screen mode; compared with the prior art: the auxiliary screen is connected outside the mobile terminal to play a role in expanding the size of the mobile terminal screen, so that the user experience is improved; and the auxiliary screen can be connected with any independent mobile terminal, and the effect of expanding the size of the display screen of any mobile terminal is achieved.
Drawings
FIG. 1 is a logic flow diagram of the present invention;
FIG. 2 is a display image of the main screen of the mobile terminal without connecting to the auxiliary screen;
FIG. 3 is a display image after the main screen is connected with the auxiliary screen;
FIG. 4 is a display image of the main screen and the sub-screen after the sub-screen receives the extension stimulation signal;
FIG. 5 is a diagram showing a main screen and an auxiliary screen displaying pictures after the auxiliary screen receives an extended stimulus signal when the size of the auxiliary screen is different from that of the main screen;
FIG. 6 is a schematic diagram of using a word document after the secondary screen is connected with the primary screen;
FIG. 7 is a display image of a time division screen mode when the mobile terminal is not connected to the secondary screen;
FIG. 8 is a split-screen mode display screen after the mobile terminal is connected to the secondary screen;
FIG. 9 is a block diagram of an extended display device;
fig. 10 is a block diagram illustrating a signal transmission process between the mobile terminal and the secondary screen.
The main element symbols are as follows:
1. a main screen 1; 2. a secondary screen 2; 3. type-c port 3; 52. a transfer end 52; 53. a video conversion terminal 53; 41. a front housing; 42. a rear housing; 6. and a mobile terminal.
Detailed Description
In order to more clearly describe the present invention, the present invention will be further described with reference to the accompanying drawings.
As described in the background art, in the prior art, the portability of the mobile terminal 6 is required to be ensured, so that the screen is small and the experience feeling is not strong during use; the cost of the folding screen pushed out by the samsung is high, the folding screen is a distance away from mass commercial use, the folding screen technology of the samsung needs to produce the screen of the mobile terminal 6 according to a special process when the mobile terminal 6 is produced, and the folding screen technology cannot be applied to the mobile terminal 6 of the common hard screen; based on this, the present invention provides a method for displaying a sub-screen 2 for expanding a main screen 1 of a mobile terminal 6, referring to fig. 1, which includes,
s1, connecting the auxiliary screen 2 with the main screen 1 to display the complete picture of the main screen 1;
the main screen 1 is a screen of the mobile terminal 6, and the display picture of the main screen 1 is a display picture when the main screen 1 is not connected with the auxiliary screen 2;
and S2, after the auxiliary screen 2 receives the extension stimulation signal, adjusting the display picture of the auxiliary screen 2 from the complete main screen 1 picture to a partial main screen 1 picture.
Compared with the prior art, the invention expands the size of the display screen of the mobile terminal 6 by connecting the auxiliary screen 2 on the main screen 1; after the main screen 1 is connected with the auxiliary screen 2, a display picture of the main screen 1 is divided into two parts which are respectively displayed on the main screen 1 and the auxiliary screen 2 of the mobile terminal 6; the main screen 1 and the auxiliary disk are displayed in a combined mode, so that the effect of expanding the display screen is achieved; the experience of the mobile terminal 6 user is enhanced; the auxiliary screen 2 can be connected with the main screen 1 of any mobile terminal 6, namely can be externally added on any mobile terminal 6 to expand the size of the display screen of any mobile terminal 6, which is an effect that the prior art cannot achieve.
In this embodiment, the mobile terminal 6 may be any terminal device such as a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales), and a vehicle-mounted computer, and such a device has a display screen.
Example 1:
see fig. 2-5; the auxiliary screen 2 is connected with the main screen 1, and identifies whether the picture of the main screen 1 is in a split screen mode after receiving the extension stimulation signal; if the picture of the main screen 1 is not in the split screen mode, the auxiliary screen 2 displays part of the picture of the main screen 1 according to the size proportion of the picture of the main screen 1.
In the embodiment, before the secondary screen 2 is connected with the primary screen 1, a special screen extension application program needs to be downloaded in the mobile terminal 6, and an extension stimulation signal is generated by the application program; after the auxiliary screen 2 is connected with the main screen 1, but the application program is not opened, the main screen 1 transmits a video signal to the auxiliary screen 2, and the auxiliary screen 2 displays the picture which is completely the same as that of the main screen 1; after an application program is opened, the application program identifies whether a picture of a main screen 1 is in a split screen mode; detecting whether a plurality of application windows are displayed on the picture of the main screen 1 at the same time, wherein each application window is in an operable state at the same time; if not, the picture of the main screen 1 is not in the split screen mode, and the application program acquires the screen resolution and size data of the main screen 1 and the auxiliary screen 2; transmitting the screen resolution and size data of the main screen 1 and the auxiliary screen 2 to the auxiliary screen 2; the auxiliary screen 2 displays part of the picture of the main screen 1 according to the size proportion of the main screen 1.
For example, the mobile terminal 6 is a mobile phone, the screen size is 5.0 inches, and the pixels are 1280 × 720; the main screen 1 displays a main interface of the picture moving terminal 6 and is in a non-split screen state.
Referring to fig. 4, when the screen size and pixels of the sub-screen 2 are identical to those of the main screen 1, the display screen of the main screen 1 is divided into two parts, and half of each of the main screen 1 and the sub-screen 2 is displayed.
When the width dimension of the auxiliary screen 2 is 1/3 of the main screen 1, the length dimension is the same as that of the main screen 1, and the pixels of the auxiliary screen 2 and the main screen 1 are the same, the display picture of the main screen 1 is divided into two parts, 2/3 of the picture of the main screen 1 is displayed on the main screen 1, and 1/3 of the picture of the main screen 1 is displayed on the auxiliary screen 2.
When the pixels of the auxiliary screen 2 are different from those of the main screen 1, the main screen 1 and the auxiliary screen 2 respectively display the pictures of the main screen 1 at the same time according to low pixel values; for example, the sub-screen 2 pixels are 960 × 540; both the main screen 1 and the sub-screen 2 are displayed with pixels of 960 x 540.
Referring to fig. 5, when the length of the secondary screen 2 is different from that of the primary screen 1, and the mobile terminal 6 is in the vertical screen display mode, the redundant portion is displayed by a black border on the display screen with the larger size of the primary screen 1 or the secondary screen 2; so as to ensure the length and the size of the display pictures of the main screen 1 and the auxiliary screen 2 to be consistent.
In this embodiment, when the mobile terminal 6 is turned over, part of the images displayed on the main screen 1 and the sub-screen 2 are turned over, and the turned partial images displayed on the main screen 1 and the sub-screen 2 are still combined into the turned main screen 1 display image; in the turning process, the processing of the turning signal and the turning of the display picture of the main screen 1 are finished by the system of the mobile terminal 6, and the screen expansion application program only expands the turned picture; the specific expansion mode is the same as the processing mode when the flip is not performed, and details are not described herein.
In the embodiment, the main screen 1 and the auxiliary screen 2 are both display screens with a point touch function; after the picture of the main screen 1 is divided into two parts to be respectively displayed on the main screen 1 or the auxiliary screen 2, at the moment, the part of the picture of the main screen 1 is equivalently displayed in the main screen 1 in an amplifying way, at the moment, the touch coordinate system of the original mobile terminal 6 is amplified in the same proportion by taking the lower left corner endpoint of the picture as the origin, and the picture on the main screen 1 corresponds to one part of the amplified touch coordinate system; the touch signal of the auxiliary screen 2 can be reversely transmitted back to the mobile terminal 6, the mobile terminal 6 responds to the touch signal, and the auxiliary screen 2 only converts the touch signal into a coordinate signal without directly responding to the touch signal; the auxiliary screen 2 is also provided with a coordinate module, when the picture of the main screen 1 is divided into two parts which are respectively displayed on the main screen 1 or the auxiliary screen 2, the touch coordinate system of the auxiliary screen 2 is amplified in the same proportion by taking the right lower corner endpoint of the picture as the origin, and the picture on the auxiliary screen 2 corresponds to one part of the amplified touch coordinate system; after a point on the auxiliary screen 2 is touched, a coordinate module of the auxiliary screen 2 acquires a placing coordinate corresponding to the touch position and transmits the coordinate to the mobile terminal 6; the mobile terminal 6 converts the coordinates into corresponding coordinate values in the coordinate system of the main screen 1, and controls the part of the display picture of the main screen 1 on the main screen 1 and the part of the display picture of the auxiliary screen 2 to change correspondingly in response to the coordinate signals.
In the embodiment, when the mobile terminal 6 performs the flipping transformation, the coordinate system of the secondary screen 2 also flips along with the flipping signal of the primary screen 1; for example, when the main screen 1 of the mobile terminal 6 is turned from the vertical screen display to the horizontal screen display, both the display picture and the coordinate module of the sub-screen 2 are turned by 90 degrees in the corresponding direction.
Referring to fig. 6, in a specific application, when the mobile terminal 6 is not connected to the main screen 1, the main screen 1 displays a WOER document editing interface, and displays a vertical screen, a text input area is above the main screen 1, and a virtual keyboard is below the main screen 1; after the auxiliary screen 2 is connected with the main screen 1, the mobile terminal 6 is rotated, at the moment, the WOER document editing interface is divided into two parts, a character input area is displayed on the main screen 1, and a virtual keyboard is displayed on the auxiliary screen 2; characters can be input in the character input area by clicking the virtual keyboard of the auxiliary screen 2; at this time, the user can use the main screen 1 as a pure display and the auxiliary screen 2 as a pure input end, so that the office and business functions of the mobile terminal 6 are greatly improved.
Example 2:
referring to fig. 7-8, after the auxiliary screen 2 receives the extension stimulation signal, it is identified whether the picture of the main screen 1 is in the split screen mode; if the picture of the main screen 1 is in the split screen mode, the auxiliary screen 2 displays and restores the picture of the split screen area in the split screen mode.
In the embodiment, before the secondary screen 2 is connected with the primary screen 1, a special screen extension application program needs to be downloaded in the mobile terminal 6, and an extension stimulation signal is generated by the application program; after the auxiliary screen 2 is connected with the main screen 1, but the application program is not opened, the main screen 1 transmits a video signal to the auxiliary screen 2, and the auxiliary screen 2 displays the picture which is completely the same as that of the main screen 1; after an application program is opened, the application program identifies whether a picture of a main screen 1 is in a split screen mode; detecting whether a plurality of application windows are displayed on the picture of the main screen 1 at the same time, wherein each application window is in an operable state at the same time; if yes, the main screen 1 is in a split screen state; the main screen 1 transmits one of the window display pictures to the auxiliary screen 2 for display.
The split-screen mode in the mobile phone means that a mobile phone screen respectively displays a window in an upper display area and a lower display area, pictures in each window are mutually independent, and the two windows can respectively display applications which are respectively opened; when the display areas of the two windows are only one part of the original mobile phone screen, compared with the interface displayed by the application opened in the non-split screen mode, the application interface displayed in the split screen mode is cut; that is, the displayed content is less, and more displayed content needs to be acquired by sliding the application interface; this results in poor operability of split screen display, and few people will use the split screen function on the mobile phone; for example, when a WeChat window and a QQ are simultaneously opened on a mobile phone by using a split screen mode, a display window of the QQ interface and a display window of the WeChat interface are both cut; the user can only see a part of the QQ and WeChat applications on the screen of the mobile terminal 6, and if the user needs to input text for chatting, the display interface of another application is also blocked by the virtual keyboard and cannot be operated.
A common view boundary line is arranged between two windows in a split screen mode in the mobile phone, and the size of each window can be adjusted by pulling the view boundary line; when the view boundary is pulled so that only a single window remains on the entire screen, the split screen mode is exited.
In this embodiment, after the screen extension application identifies that the picture of the main screen 1 is in the split screen mode, one of the window images is transmitted to the auxiliary screen 2, all pictures of the auxiliary screen 2 only display the application interface in the window, and the display interface of the application is restored according to the size of the auxiliary screen 2; the main screen 1 reserves the display picture of another window and restores the display interface of the application; different split-screen windows are respectively displayed in the main screen 1 and the auxiliary screen 2, so that an application interface displayed in the main screen 1 is completely the same as an application interface not displayed in a split-screen mode; the experience of the user is greatly improved.
For example, when a WeChat window and a QQ are opened simultaneously in a split screen mode on a mobile phone, a QQ interface is displayed on a main screen 1, a WeChat interface is displayed on an auxiliary screen 2, and the display content of the QQ interface on the main screen 1 is not different from the content displayed in the non-split screen; the auxiliary screen 2 restores the display content of the WeChat interface according to the size of the auxiliary screen; the user can simultaneously operate the WeChat and the qq, the experience is the same as that of simultaneously operating the two mobile terminals 6, but actually, the control signals received by the auxiliary screen 2 and the main screen 1 are processed by the mobile terminals 6.
In the embodiment, after the screen expansion application program identifies that the picture of the main screen 1 is in the split screen mode, a visual prompt is displayed, so that a user can select one of the windows to be displayed in the auxiliary screen 2 through operation; the operation may be a long press or drag or a box selection, etc.
Referring to fig. 9 and 10, in example 1 and example 2, the sub-screen 2 is connected to the moving terminal 6 through the type-c port 3; the specific auxiliary screen 2 is provided with a type-c conversion module, and the module comprises a type-c port 3, a transfer end 52 connected with the type-c port 3 and a video signal conversion end; the video signal of the main screen 1 is transmitted to the auxiliary screen 2 after sequentially passing through the type-c port 3 and the video signal conversion end; coordinate signals or point touch signals or other control signals generated by the auxiliary screen 2 are reversely transmitted to the mobile terminal 6 through the relay terminal 52; the mobile terminal 6 processes the signal and then responds accordingly, and the response can be to control the display frame in the main screen 1 or the sub-screen 2 to change.
By additionally arranging the type-c conversion module in the auxiliary screen 2, signals can be transmitted between the mobile terminals 6 only through the type-c port 3, and the objective condition that the mobile terminals 6 only have one interface is met; no special requirements are generated on the mobile terminal 6 when the auxiliary screen 2 is used for expanding the display of the main screen 1; the application range of the sub-screen 2 is increased.
In this embodiment, the sub-screen 2 is disposed on the extended display device, and a specific structure of the extended display device is a flip-type mobile phone shell, and includes a front shell and a rear shell, and the front shell can be turned over relative to the rear shell to form two forms of covering the front shell or unfolding; the auxiliary screen 2 is arranged on the front shell 41, the lower end of the rear shell 42 is provided with a type-c male head, the movable end 6 is arranged on the rear shell and then is inserted with the type-c male head, and the type-c male head is electrically connected with the auxiliary screen 2 through a flexible circuit board; when the mobile phone is used, the auxiliary screen 2 can be displayed by turning over the mobile phone shell, the auxiliary screen 2 can be in a power-off state when the auxiliary screen 2 is not needed, and the auxiliary screen 2 is started when the auxiliary screen 2 is needed; the form of arranging the auxiliary screen 2 on the front shell 41 of the flip type mobile phone shell not only can play a role of expanding the screen of the mobile terminal 6, but also has strong portability.
In the embodiment, the auxiliary screen 2 is further provided with at least one type-c port 3 for charging or inserting an earphone; the mobile terminal 6 or the auxiliary screen 2 can be charged through the type-c port 3; meanwhile, the port can be connected with an earphone to acquire the audio information of the mobile terminal 6.
The invention has the advantages that:
1. the auxiliary screen is connected outside the mobile terminal to play a role in expanding the size of the mobile terminal screen, so that the user experience is improved; and the auxiliary screen can be connected with any independent mobile terminal, and the effect of expanding the size of the display screen of any mobile terminal is achieved.
2. After the auxiliary screen and the main screen are connected, and the mobile terminal is rotated, the WOER document editing interface can be divided into two parts, a character input area is displayed on the main screen, and a virtual keyboard is displayed on the auxiliary screen; clicking a virtual keyboard of the auxiliary screen to input characters in the character input area; at the moment, the user can use the main screen as a pure display and the auxiliary screen as a pure input end, so that the office and business functions of the mobile terminal are greatly improved.
3. Meanwhile, when a WeChat window and a QQ are opened simultaneously in a split screen mode on the mobile phone, a QQ interface is displayed on a main screen, a WeChat interface is displayed on an auxiliary screen, and the display content of the QQ interface on the main screen is not different from the content displayed on the non-split screen; the auxiliary screen restores the display content of the WeChat interface according to the size of the auxiliary screen; the user can simultaneously operate the WeChat and the qq, and the experience feeling is the same as that of simultaneously operating two mobile terminals.
4. By additionally arranging the type-c conversion module in the auxiliary screen, signals can be transmitted between the mobile terminals only through the type-c port, and the objective condition that the mobile terminals only have one interface is met; no special requirement is generated on the mobile terminal when the display of the main screen is expanded by using the auxiliary screen; the application range of the auxiliary screen is increased.
5. The mode that the auxiliary screen is arranged on the front shell of the flip type mobile phone shell can play a role in expanding the screen at the mobile terminal and has strong portability.
The above disclosure is only for a few specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (10)
1. A method for displaying a sub-screen for expanding a main screen of a mobile terminal, comprising,
the auxiliary screen is connected with the main screen and displays a complete picture of the main screen;
the main screen is a self-contained screen of the mobile terminal, and a display picture of the main screen is a display picture when the main screen is not connected with the auxiliary screen;
the auxiliary screen receives the expanded stimulation signal and adjusts the display picture of the auxiliary screen from the complete main screen picture to a partial main screen picture;
when the display picture of the auxiliary screen is adjusted from the complete main screen picture to a partial main screen picture, whether the main screen picture is in a split screen mode is identified; if the main screen picture is not in the split screen mode, the auxiliary screen displays part of the main screen picture according to the size proportion of the main screen picture; and if the main screen picture is in the split screen mode, the auxiliary screen displays and restores the picture of the split screen area in the split screen mode.
2. The method according to claim 1, wherein the sub-screen generates a corresponding control signal according to the received external touch signal; and transmitting the control signal to the mobile terminal; the mobile terminal responds to the control signal.
3. The sub-screen display method for expanding the main screen of the mobile terminal as claimed in claim 2, wherein the sub-screen is connected to the mobile terminal through a type-c conversion terminal; the type-c conversion end comprises a type-c plug, a transfer end connected with the type-c plug and a video signal conversion end; the type-c plug is connected with the mobile terminal, the auxiliary screen receives the video signal transmitted by the mobile terminal through the video signal conversion terminal, and displays a corresponding display picture according to the video signal; the auxiliary screen generates a control signal and transmits the control signal to the mobile terminal through the transfer terminal.
4. The method according to claim 1, wherein the mobile terminal obtains the screen size and resolution of the secondary screen when the secondary screen displays a part of the primary screen in proportion to the size of the primary screen; and adjusting the video signal transmitted to the sub-screen according to the sizes and resolutions of the main screen and the sub-screen.
5. The method according to claim 1, wherein when the sub-screen displays and restores the screen of the split screen area in the split screen mode, the main screen displays a visual prompt, and a split screen window in the main screen is selectively displayed in the sub-screen by a long press or a drag or a frame selection operation.
6. A secondary screen display device for expanding a primary screen of a mobile terminal is characterized by comprising
The extended display device is connected with the main screen and used for displaying a complete main screen picture;
the main screen is a self-contained screen of the mobile terminal, and the main screen display picture refers to a display picture of the main screen when the main screen is not connected with the expansion display device;
after the expansion display device receives the expansion stimulation signal, the display picture of the expansion display device is adjusted from a complete main screen picture to a partial main screen picture.
7. The secondary screen display device for expanding the primary screen of the mobile terminal according to claim 6, wherein the expansion display device generates a corresponding control signal according to the received external touch signal and transmits the control signal to the mobile terminal; the mobile terminal responds to the control signal.
8. The display method of an extended display device for extending a main screen of a mobile terminal according to claim 7, wherein the extended display device is connected to the mobile terminal through a type-c converter terminal; the type-c conversion end comprises a type-c plug, a transfer end connected with the type-c plug and a video signal conversion end; the type-c plug is connected with the mobile terminal, the extended display device receives the video signal transmitted by the mobile terminal through the video signal conversion terminal and displays a corresponding display picture according to the video signal; the expansion display device generates a control signal and transmits the control signal to the mobile terminal through the transfer terminal.
9. The display method of the extended display device for extending the main screen of the mobile terminal according to claim 6, wherein when the extended display device displays a part of the main screen in proportion to the size of the main screen, the mobile terminal obtains the screen size and resolution of the extended display device; and adjusting the video signal transmitted to the extended display device according to the sizes and resolutions of the main screen and the extended display device.
10. The display method of the extended display device for extending the main screen of the mobile terminal according to claim 6, wherein when the extended display device displays and restores the screen of the split screen area in the split screen mode, the main screen displays a visual prompt, and a split screen window in the main screen is selectively displayed in the extended display device by long-time pressing or dragging or frame selection.
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