CN102857628A - Multi-screen display equipment - Google Patents

Abstract

The invention discloses multi-screen display equipment and a screen switching method thereof. The multi-screen display equipment comprises a communication end with a mobile communication function; the communication end comprises a mobile terminal mainboard and an inner screen display board; the mobile terminal mainboard is provided with a mobile terminal master controller, and a mobile communication module, a microphone, a speaker and a memory connected with the mobile terminal master controller respectively, as well as a battery for providing a working power supply; the inner screen display board is provided with a mobile terminal inner screen; and the inner screen display board is also provided with an inner screen expansion module for expanding the display function of the communication end. In the multi-screen display equipment disclosed by the invention, the inner screen expansion module is arranged on the inner screen display board, redesign of the mobile terminal mainboard is not needed, the function of an expansion display screen is realized with the lowest design and manufacturing cost, and resources are saved; and moreover, the user operation is facilitated, the operation flexibility is enhanced, and the entertainment and operability of the multi-screen display equipment are improved.

Description

A multi-screen display device

This application is a divisional application of a Chinese patent application with an application date of June 30, 2011, an application number of 201110185345.5, and an invention title of "Mobile Communication Terminal".

technical field

The invention relates to the field of mobile communication, in particular to a multi-screen display device with expandable screens.

Background technique

Generally, devices that can connect to the mobile Internet are collectively referred to as mobile communication terminals, such as mobile phones, PDAs, IPADs, TVs that can access the Internet, tablet computers, and handheld computers, etc. can all be called mobile communication terminals. Mobile terminals are widely used because of their mobility, portability and many other advantages. Especially, mobile phones as mobile communication tools have become a necessity in people's lives.

As a mobile communication mobile phone, it is faced with more and more mobile Internet application requirements, such as using mobile communication terminals to browse Internet news, check Weibo, chat online, watch multimedia audio-visual content, and play games and entertainment. Under such circumstances, various defects undoubtedly appear in the display part of the mobile communication terminal, especially the screen is too small to meet the requirements of the mobile Internet.

Therefore, it is necessary to develop a multi-screen or multi-screen display device that can be connected to an external screen, such as combining a PAD with a large screen and a mobile phone, which can meet people's needs for output display on mobile terminals.

Contents of the invention

The invention provides a multi-screen display device and a screen switching method thereof, which can be connected to different types of screens, and the size of these external screens can be larger than the screens set by the mobile communication terminal itself, which solves the problem of the small screen of the current mobile communication terminal. Technical problems that cannot meet the development needs of the mobile Internet.

A multi-screen display device, including a communication terminal with mobile communication function, the communication terminal includes a mobile terminal main board and an inner screen display board, the mobile terminal main board is provided with a mobile terminal main control, respectively connected with the mobile terminal main control Connected mobile communication module, microphone, loudspeaker, memory and battery for providing working power, the inner screen display board is provided with a mobile terminal inner screen, and the inner screen display board is also provided with a mobile terminal for extending the communication The internal screen expansion module of terminal display function, the main board of the mobile terminal is also provided with an image output module connected with the main control of the mobile terminal, and the image output module sends the processed image information to the internal screen of the mobile terminal or As for the internal screen expansion module, the mobile communication terminal also includes an external screen terminal which is separated from the communication terminal, and the external screen terminal is provided with an external screen expansion terminal for data transmission with the internal screen expansion module. module.

The main control of the mobile terminal includes a display switching module, which is used to control the image output module to transmit image information to the internal screen of the mobile terminal or the internal screen expansion module.

The external screen end is provided with an external display screen, and the main control of the mobile terminal can control the selective operation of the external display screen and the internal screen of the mobile terminal of the communication terminal.

The external screen expansion module includes an external screen communication interface for connecting with the internal screen expansion module and a decoding module connected with the external screen communication interface.

The external screen terminal is also provided with a signal detection module for detecting whether the communication terminal is electrically connected to the external screen terminal, and the signal detection module is connected to the external screen expansion module.

The outer screen end is provided with a battery, and when the outer screen end is electrically connected to the communication end, the battery at the outer screen end provides electric energy for the operation of the entire mobile communication terminal, and the battery at the outer screen end detects that the battery of the communication end has insufficient power , it can charge the battery of the communication terminal.

An input/output device capable of controlling the operation of the mobile communication terminal is provided on the external screen end, and the input/output device is connected with the external screen expansion module.

The size of the external display screen is larger than the size of the internal screen of the mobile terminal.

A screen switching method for a multi-screen display device. When the communication terminal is not connected to the external screen terminal, the internal screen of the mobile terminal receives and displays an image signal; when the communication terminal is connected to the external screen terminal, the external screen terminal receives the image signal and displays it. It is displayed through an external display screen; when the communication terminal is turned on, it is preferred to send the image signal to the internal screen of the mobile terminal for display, and when the main control of the mobile terminal receives the signal fed back from the external screen terminal, it switches the image signal and sends it to the external screen terminal .

When the communication terminal is not connected with the external screen terminal, the steps of receiving and displaying the image signal on the internal screen of the mobile terminal include: when the communication terminal is not connected with the external screen terminal, and in the working state of the communication terminal, the display switching module will The command is sent to the internal screen of the mobile terminal, so that the internal screen of the mobile terminal is in a working state, receives the image signal sent by the image output module, and displays it.

When the communication terminal is connected to the external screen terminal, the external screen terminal receives the image signal and displays it through the external display screen. The above-mentioned display switching module controls the encoding module to be in the working state, receives the image signal sent by the image output module, encodes the image signal, and then transmits the image signal to the external screen terminal through the mobile terminal communication interface and displays it on the external display screen.

Detect whether the communication terminal is electrically connected to the external screen terminal.

If the electrical connection is established, the connection information is fed back to the communication terminal through the external screen communication interface. After receiving the feedback information, the communication terminal controls the internal screen of the mobile terminal to be in a non-working state, and performs an image signal sent by the image output module. After encoding, it is transmitted to the external screen terminal through the communication interface of the mobile terminal.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the first embodiment of the mobile communication terminal of the present invention.

Fig. 2 is a schematic diagram of the structure of the second embodiment of the mobile communication terminal of the present invention.

FIG. 3A is the first image signal transmission scheme of the mobile communication terminal of the present invention.

FIG. 3B is a second image signal transmission scheme of the mobile communication terminal of the present invention.

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose, the specific structure and effects of the present invention will be described in detail below in conjunction with the accompanying drawings, implementation methods, and structural features.

The multi-screen display device of the present invention realizes the function of mobile communication by connecting to a mobile communication network, such as connecting to mobile communication networks such as GSM or CDMA mobile communication networks or third-generation mobile communication systems such as WCDMA, CDMA2000, and TD-SCDMA as multi-screen The displayed device is used.

In addition to the basic communication functions of the existing mobile communication terminal, the multi-screen display device of the present invention also includes an external screen terminal as an extended screen of the multi-screen display device. By starting the external screen terminal, the external screen terminal can be used. The larger display screen at the screen end solves the problem of the small display screen of the mobile communication terminal itself.

Specifically, as shown in FIG. 1 , it is a schematic diagram of the structure of the multi-screen display device of the present invention. The multi-screen display device of the present invention includes a communication terminal 1 and an external screen terminal 2. The communication terminal 1 and the external screen terminal 2 are separately arranged. When a user needs a larger display screen, the communication terminal 1 and the external screen terminal 2 can be connected The external screen terminal 2 is connected, so that the external screen terminal 2 also enters the working state. The target content is displayed through the external screen terminal 2, such as playing video files or browsing web pages. When the user goes out, for the convenience of the journey, he can only carry the communication terminal 1, and start the communication terminal 1 to realize functions such as communication or multimedia file playback.

Described communication end 1 is the core part of whole equipment, and it is provided with mobile terminal main board 10 and inner screen display board 11, and the design of described mobile terminal main board 10 is identical with existing main board design, is the circuit control of whole equipment. The center is provided with a mobile terminal main control 100, an image output module 102, an operation key recognition module 103, a mobile communication module 104, a microphone 105, a loudspeaker 106 and a storage module 107;

The mobile terminal main control 100 is the computing core and control core of the mobile communication terminal, and is mainly used to explain the instructions of each functional module and process and execute instructions. It is different from the main control of the existing mobile terminal in that it also includes a display Switching module 101; the display switching module 101 is used to control the work of the mobile terminal internal screen 110 or the internal screen expansion module;

The image output module 102 is used to process the image signal, and send the image signal to the internal screen of the mobile terminal and the internal screen expansion module;

The operation key identification module 103 is connected as an input device with the key set on the mobile communication terminal, and is used to identify the user's operation action on the key, and identify and execute the corresponding instruction;

The mobile communication module 104 is a channel for information transmission between the mobile communication terminal and external mobile communication equipment, such as GSM, CDMA, WCDMA, CDMA2000, TD-SCDMA, 3G and other mobile network communication modules;

The microphone 105 is used to collect the voice signal of the user and send it out through the mobile communication module;

The loudspeaker 106 is used to transmit the sound information from other mobile communication terminals or its own audio signal to the user, so that the user can hear the sound information of the user of the remote mobile communication terminal, as well as the audio and video files played by the mobile terminal itself ;

The storage module 107 is used for storing the necessary running programs of the mobile communication terminal and for storing the address book information locally.

When the communication terminal is not connected to the external screen terminal, and the communication terminal is in the working state of the communication terminal, the display switching module 101 sends instructions to the internal screen 110 of the mobile terminal through interfaces such as IIC interface or SPI, so that the internal screen 110 of the mobile terminal is in the In the working state, the image signal sent by the image output module 102 is received and displayed; when the communication terminal and the external screen terminal are connected together, in the working state of the external screen terminal, the display switching module 101 controls the coding module 111 to be in In the working state, the image signal sent by the image output module 102 is received, and the image signal is encoded, and then transmitted to the external screen terminal 2 through the mobile terminal communication interface 112; when the communication terminal 1 is turned on, the image signal is first sent to the mobile terminal The screen 110 shows that when the main controller 100 of the mobile terminal receives the signal fed back from the external screen terminal 2, the switching image signal is sent to the external screen terminal 2;

The internal screen display board 11 is provided with a mobile terminal internal screen 110 and an internal screen expansion module (not labeled). specifically:

The internal screen 110 of the mobile terminal is a display screen provided by the mobile terminal itself. Due to the limitation of the volume of the mobile terminal itself, the size of the internal screen 110 of the mobile terminal is smaller than the size of the mobile terminal;

The internal screen expansion module includes an encoding module 111 and a mobile terminal communication interface 112;

Described encoding module 111 can be LVDS (Low-Voltage Differential Signaling, low-voltage differential signal) encoding module or other similar encoding modules such as HDMI ((High Definition Multimedia Interface, High Definition Multimedia Interface)) encoding module, for The RGB signal from the image output module 101 is encoded and set, and the encoding module 111 adopts the LVDS or HDMI drive scheme to increase the transmission distance and anti-interference ability of the RGB signal, reduce the IO connection port of the data, and ensure the integrity of the image signal. And it is quickly transmitted to the external screen terminal 2 to pave the way;

The mobile terminal communication interface 112 is used to connect the external screen terminal 2, and can transmit, for example, image signals, control signals, audio signals, etc., and establishes a channel for information interaction between the communication terminal 1 and the external screen terminal 2, It can be a wired data interface such as USB, LVDS, HDMI, etc., or a wireless data transmission module such as a bluetooth module, infrared, etc., or the mobile terminal communication interface can be designed as a special communication interface according to the specific type of data to be transmitted.

During specific implementation, in order to increase the functions of the device of the present invention, wireless communication modules such as Wi-Fi, Bluetooth, and infrared can be further added on the main board of the mobile terminal, and communication modules such as GPS and gravity sensors can also be added, or on the mobile terminal. A memory card expansion port is added to the terminal to increase its data storage capacity. Further, in order to enable the mobile communication terminal to realize many functions such as smart phones, operating systems such as Symbian, Windows Mobile, Android, Palm OS, BlackBerry, Linux and the like can also be used in the mobile communication terminal of the present invention. Since these functions are already possessed by existing mobile terminals, they will not be described in detail here.

The following will introduce the circuit structure of the outer screen terminal 2 of the device of the present invention.

The external screen terminal 2 includes an external screen expansion interface (not labeled), a signal detection module 23 and an external display screen 20 . The external screen expansion interface includes an external screen communication interface 22 and a decoding module 21 . The external screen communication interface 22 corresponds to the mobile terminal communication interface 112, and is used to receive data from the communication terminal 1 or transmit data to the communication terminal 1; corresponding to the aforementioned mobile terminal communication interface 112, the external screen communication interface 22 It can also be a data transmission interface such as USB, LVDS, HDMI, etc.;

The decoding module 21 corresponds to the encoding module 111 of the communication terminal 1, and can be an LVDS decoding module or an HDMI decoding module, which is used to decode the received LVDS or HDMI signal, and process it into an external display. The RGB signal displayed on the screen 20;

The signal detection module 23 is used to detect whether to enter the working state of the external screen terminal, that is, whether the mobile terminal communication interface 112 of the communication terminal 1 is electrically connected to the external screen communication interface 22 of the external screen terminal 2, and if the electrical connection is established , then feed back the connection information to the communication terminal 1 through the external screen communication interface 22, and the display switching module 101 of the mobile terminal main control 100 of the communication terminal 1 controls the internal screen 110 of the mobile terminal to be in a non-working state after receiving the feedback information , the control coding module 111 is in the working state, after the coding module 111 codes the image signal sent by the image output module 102, it is transmitted to the external screen terminal 2 through the mobile terminal communication interface 112, and the external screen communication interface 22 of the external screen terminal 2 receives After that, it is transmitted to the decoding module 21 for decoding, and then displayed by the external display screen 20.

The above-mentioned signal detection module 23 is arranged on the outer screen terminal 2. During specific implementation, the signal detection module 23 can also be arranged on the communication terminal 1, which is connected to the mobile terminal communication interface 112 (not shown), and detects the mobile terminal communication. Whether the interface 112 establishes an electrical connection with the external device, and if so, feeds back information to the display switching module 101 .

The above-mentioned display switching module 101 of the main control unit 100 of the mobile terminal can control the internal screen 110 of the mobile terminal or the encoding module 111 to receive image signals by sending instructions, or can establish a single pole between the image output module 102 and the internal screen 110 of the mobile terminal. Double-throw switch, the display switching module 101 determines whether the image output module 102 is connected to the internal screen 110 of the mobile terminal or connected to the display screen expansion module by controlling the single-pole double-throw switch.

In terms of power supply, there is a battery in the communication terminal 1, and a battery in the external screen terminal 2. When the external screen terminal 2 is electrically connected to the communication terminal 1, it is in the working state of the external screen terminal 2. At this time, the external screen terminal The battery of 2 provides electric energy for the work of the entire mobile communication terminal, and the battery of the external screen terminal 2 can also charge the battery of the communication terminal, so that there is no need to connect an external AC power supply.

Please refer to FIG. 2 , which is a structural schematic diagram of a second embodiment of the device of the present invention. The difference between this embodiment and the above-mentioned first embodiment is that in this embodiment, the communication terminal has added an internal screen touch screen module 113 connected to the main control of the mobile terminal, and the external screen terminal has added a communication interface 22 with the external screen. Connected external screen touch screen module 24. In this way, the user can realize input to the device through the touch screen. For example, in the working state of the communication terminal not connected to the external screen terminal, the internal screen touch screen module 113 obtains the information sent by the user touching the internal screen, and transmits it to the mobile terminal main control 100 ; Under the working state of the external screen connected to the external screen end, the external screen touch screen module 24 obtains the information sent by the user touching the external screen, and transmits it to the mobile terminal main control 100 through the external screen communication interface 22 and the mobile terminal communication interface 112.

In the first and second embodiments of the device of the present invention described above, input/output devices (not shown), such as control buttons, speakers, microphones, and memory card extensions, are provided on the outer screen of the device. Interface, data transmission interface, camera, headphone jack, etc. These input and output devices realize data transmission through the external screen expansion module and the communication terminal. In the working state of the communication terminal, the user can control the communication terminal through the input/output device set on the communication terminal; in the working state of the external screen terminal, the user can control the entire mobile communication terminal through the input/output device on the external screen terminal 2. The control of the terminal, such as sending an instruction to browse the webpage to the communication end, the communication end executes the instruction, and displays the content of the webpage on the external display screen 20 of the external screen end, and at the same time, the sound information can be played through the speaker provided by the external screen end itself. At this time, the internal screen 110 and the speaker 106 of the mobile terminal at the communication end are in a state of stopping working.

Different from the existing general design, the present invention adopts a time-sharing parallel mode to control signals to be displayed on the internal screen 110 of the mobile terminal or on the external display screen 20, which has the following advantages:

1. Since the main board of a general mobile communication terminal has many functions, high-frequency signal interweaving, and high integration, it is far more complicated than the screen display board. Therefore, the multi-screen display device of the present invention needs to communicate with the external screen The encoding module 111 and the mobile terminal communication interface 112 connected to terminal 2 are all arranged on the inner screen display board for specially setting the display screen circuit, so that there is no need to change the design on the main board, and the inner screen display board (screen display board) is selected. Branch processing of image signals can avoid a series of problems caused by motherboard redesign and verification, and realize multi-screen expansion with minimum design cost;

2. The present invention enables the communication terminal 1 to be connected to different types of screens in a time-sharing parallel manner. For example, the internal screen 110 of the communication terminal can be understood as a display screen included in the body of the mobile communication terminal itself, providing users with basic display functions; The external display screen 20 of the external screen terminal 2 can be understood as having a large display screen such as a tablet computer, which can be electrically connected to the communication terminal 1 through plugging or other means to display image information. Since the external display screen 20 provides The wide screen is much larger than the internal screen 110 of the mobile terminal, so it meets the needs of users for large-screen display;

3. The circuit design of the mobile communication terminal of the present invention is consistent with the existing single-screen mobile terminal equipment, and it does not need to modify its own hardware like the existing dual-screen mobile communication terminal, and redesign to increase the multiplexer and other hardware devices;

4. As shown in FIGS. 3A and 3B , there are two different transmission modes of the image signal of the present invention. The image signal of the present invention is a standard RGB signal during the transmission process, and the signal is transmitted to display screens with different functions through flexible cables, PCB wiring, etc., and for various circuits, the signal can use different connection interfaces to transfer.

In the above-mentioned embodiments, the communication terminal is provided with input devices and output devices, such as function buttons, microphones, speakers, etc., and the external screen terminal is only responsible for decoding data and displaying images. In the specific implementation, it is also possible to add input devices and output devices on the external screen end, so that users can directly perform actions such as touching or manipulating buttons, playing, etc. through the large-area external display screen when the external screen end is turned on. Convenient operation, such as game interface control or entertainment functions such as browsing the web, is more applicable.

Based on the diversification and enrichment trend of existing game products or online entertainment, operating the communication terminal by operating a large-area external display screen makes the operation more convenient and the interface is friendly, which is conducive to entertainment and fun. The communication terminal is small in size and easy to carry around, and can be used as a mobile communication terminal by connecting to a mobile communication system through the mobile communication function of the communication terminal.

The above are only descriptions of the embodiments of the present invention, but are not intended to limit the present invention. Various changes or modifications made according to the spirit of the present invention are within the scope of protection of the claims of the present invention.

Claims (13)

1. A multi-screen display device, comprising a communication terminal with a mobile communication function, the communication terminal comprising a mobile terminal main board and an internal display panel, the mobile terminal main board is provided with a mobile terminal main control, respectively connected to the mobile terminal The mobile communication module connected by the main control, microphone, loudspeaker, memory and the battery for providing working power, the inner screen of the mobile terminal is arranged on the inner screen display board, and it is characterized in that: the inner screen display board is also provided with There is an internal screen expansion module for expanding the display function of the communication terminal, and the main board of the mobile terminal is also provided with an image output module connected to the main control of the mobile terminal, and the image output module sends the processed image information to For the mobile terminal internal screen or the described internal screen expansion module, the mobile communication terminal also includes an external screen terminal which is set separately from the communication terminal, and the external screen terminal is provided with the external screen terminal for communicating with the internal screen expansion module. External screen expansion module for data transmission. 2. The device according to claim 1, characterized in that: the main control of the mobile terminal includes a display switching module, which is used to control the image output module to transmit image information to the internal screen or internal screen extension of the mobile terminal module. 3. The device according to claim 1, characterized in that: the external screen end is provided with an external display screen, and the main control of the mobile terminal can control the selective connection between the external display screen and the internal screen of the mobile terminal of the communication terminal. Work. 4. The device according to claim 3, wherein the external screen expansion module includes an external screen communication interface for connecting with the internal screen expansion module and a decoding module connected with the external screen communication interface. 5. The device according to claim 1, characterized in that: said external screen terminal is also provided with a signal detection module for detecting whether the communication terminal is electrically connected to the external screen terminal, and the signal detection module is connected to said external screen terminal. External screen expansion module connection. 6. The device according to claim 1, characterized in that: a battery is provided in the outer screen end, and when the outer screen end is electrically connected to the communication end, the battery at the outer screen end provides power for the operation of the entire mobile communication terminal. Electric energy, and when the external screen detects that the battery of the communication terminal has insufficient power, it can charge the battery of the communication terminal. 7. The device according to claim 1, characterized in that: an input/output device capable of controlling the work of the mobile communication terminal is provided on the outer screen end, and the input/output device is extended with the outer screen module connection. 8. The device according to any one of claims 3 to 7, wherein the size of the external display screen is larger than the size of the internal screen of the mobile terminal. 9. The screen switching method of the device according to any one of the preceding claims, characterized in that: when the communication terminal is not connected to the external screen terminal, the internal screen of the mobile terminal receives and displays the image signal; When the communication terminal is connected to the external screen terminal, the external screen terminal receives the image signal and displays it through the external display screen; When the communication terminal is turned on, it is preferred to send the image signal to the internal screen of the mobile terminal for display. When the main control of the mobile terminal receives the signal fed back from the external screen terminal, the switching image signal is sent to the external screen terminal. 10. The method according to claim 9, wherein when the communication terminal is not connected to the external screen terminal, the step of receiving and displaying the image signal on the internal screen of the mobile terminal comprises: When the communication terminal is not connected to the external screen terminal, and the communication terminal is in the working state, the display switching module sends instructions to the internal screen of the mobile terminal through the interface, so that the internal screen of the mobile terminal is in the working state, and receives the image signal sent by the image output module. and display it. 11. The method according to claim 9, wherein when the communication terminal is connected to the external screen terminal, the external screen terminal receives the image signal and displays it through an external display screen comprising; When the communication terminal and the external screen terminal are connected together, the external screen terminal is in the working state, the display switching module controls the encoding module to be in the working state, receives the image signal sent by the image output module, and encodes the image signal, and then It is transmitted to the external screen terminal through the communication interface of the mobile terminal and displayed on the external display screen. 12. The method of claim 9, further comprising: Detect whether the communication terminal is electrically connected to the external screen terminal. 13. The method of claim 12, further comprising: If the electrical connection is established, the connection information is fed back to the communication terminal through the external screen communication interface. After receiving the feedback information, the communication terminal controls the internal screen of the mobile terminal to be in a non-working state, and performs an image signal sent by the image output module. After encoding, it is transmitted to the external screen terminal through the communication interface of the mobile terminal.

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