CN113225714A - Screen projection method and system - Google Patents
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- CN113225714A CN113225714A CN202110413030.5A CN202110413030A CN113225714A CN 113225714 A CN113225714 A CN 113225714A CN 202110413030 A CN202110413030 A CN 202110413030A CN 113225714 A CN113225714 A CN 113225714A
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- H—ELECTRICITY
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- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
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Abstract
The invention relates to a screen projection method and a screen projection system. A screen projection method, comprising: the display terminal generates and broadcasts communication data based on the near field communication technology and responds to screen projection operation; the communication data comprises an IP address used for representing a network interface of the display end; and the delivery end receives the communication data and executes screen delivery operation based on the IP address. According to the screen projection method provided by the invention, the IP address of the display end is sent to the projection end by using a short-distance communication technology, and the screen projection operation can be realized without manually inputting the IP address after the projection end is obtained, so that the screen projection method is convenient and quick.
Description
Technical Field
The invention relates to the field of electronic equipment, in particular to a screen projection method and a screen projection system.
Background
At present, when people want to share data in a mobile phone or a computer to other people, the data is thrown on a large screen to achieve the maximum sharing effect. Based on aforementioned demand, smart machine such as cell-phone also corresponding have at present and throw the screen function, and most displays also mostly have and throw the screen function, but throw the screen at present and divide into two kinds of situations: one is the situation that the display and the intelligent device belong to the same local area network; the other is that the display and the intelligent device are not in the same local area network or the display and the intelligent device belong to the same Internet.
When the display and the intelligent device belong to the same local area network, screen projection operation is simple, but when the display and the intelligent device are not in the same local area network, the screen projection operation needs manual input of an IP address to realize connection and screen projection operation, the operation of manually inputting the IP address is slow and easy to make mistakes, the screen projection starting speed is affected, and the experience of a user is not friendly.
Therefore, the existing screen projection operation technology has defects and needs to be improved and enhanced.
Disclosure of Invention
In view of the foregoing disadvantages of the prior art, an object of the present invention is to provide a screen projection method and system for solving the problem of fast screen projection when a display and an intelligent device are not in the same lan.
In order to achieve the purpose, the invention adopts the following technical scheme:
a screen projection method, comprising:
the display terminal generates and broadcasts communication data based on the near field communication technology and responds to screen projection operation; the communication data comprises an IP address used for representing a network interface of the display end;
and the delivery end receives the communication data and executes screen delivery operation based on the IP address.
The screen projection method is further characterized in that the communication data comprises a plurality of content tags;
the content tags comprise AD TYPE used for self-definition, vendor ID used for representing vendor identification and fixed IP tags used for representing physical models of the display terminal equipment.
The screen projection method further includes the following steps of generating and broadcasting communication data based on the near field communication technology:
arranging the contents of the communication data according to a preset sequence, and sequentially putting the contents into a cache;
and performing round broadcasting transmission based on the communication data in the buffer.
In the screen projection method, the process of obtaining the IP address by the delivery end includes:
receiving and obtaining the communication data;
and analyzing the communication data and putting the communication data into a cache, and obtaining the IP address content according to a preset sequence.
In a further screen projection method, at least one of the content tags of the communication data comprises a plurality of bytes.
In the screen projection method, each byte in the communication data is expressed by using 16-system data.
In the further screen projection method, the working modes of the display end comprise a single mode and a multi-mode;
the single mode is: when one delivery end executes screen projection operation, the display end does not receive screen projection operation of other delivery ends;
the multivariate mode is as follows: and the display end always receives screen projection operation execution of the latest delivery end.
In the screen projection method, the near field communication technology includes zigbee, bluetooth, and WiFi.
In the screen projection method, the delivery end comprises a mobile phone, a PC and electronic equipment with a near field communication function and a screen projection function.
A screen projection system comprises a display end and a projection end;
the display terminal is used for generating and broadcasting communication data based on the near field communication technology and responding to screen projection operation; the communication data comprises an IP address used for representing a network interface of the display end;
and the delivery end is used for receiving the communication data and executing screen delivery operation based on the IP address.
Compared with the prior art, the screen projection method and the screen projection system provided by the invention have the following beneficial effects:
according to the screen projection method provided by the invention, the IP address of the display end is sent to the projection end by using a short-distance communication technology, and the screen projection operation can be realized without manually inputting the IP address after the projection end is obtained, so that the screen projection method is convenient and quick.
Drawings
FIG. 1 is a flow chart of a screen projection method provided by the present invention;
fig. 2 is a flow chart of a method for broadcasting communication data by a display terminal according to the present invention;
fig. 3 is a flow chart of a method for receiving communication data by a delivery terminal provided by the present invention;
FIG. 4 is a block diagram of a screen projection system provided by the present invention;
fig. 5 is a schematic block diagram of two working modes of the display terminal provided by the invention.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It is to be understood by those skilled in the art that the foregoing general description and the following detailed description are exemplary and explanatory of specific embodiments of the invention, and are not intended to limit the invention.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of steps does not include only those steps, but may include other steps not expressly listed or inherent to such process or method. Also, without further limitation, one or more devices or subsystems, elements or structures or components beginning with "comprise. The appearances of the phrases "in one embodiment," "in another embodiment," and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Referring to fig. 1, the present invention provides a screen projecting method, which is applicable to a screen projecting system including a display end and a delivery end, and is used for solving a situation that a screen projecting operation is performed when the display end and the delivery end are not in the same lan, that is, when the display end and the delivery end are in the same lan, a current screen projecting method is used, which is not specifically limited; the screen projection method provided by the invention comprises the following steps:
s1, generating and broadcasting communication data by the display terminal based on the near field communication technology, and responding to screen projection operation; the communication data includes an IP Address (Internet Protocol Address, which may also refer to an IP Address in a local area network) for representing a network interface of the display terminal; specifically, the display terminal is preferably a display device having a short-distance communication function, the short-distance communication technology may use a Bluetooth (Bluetooth, short-distance wireless communication technology) communication technology commonly used in the field, a 2.4G (2.4G module, a frequency band of which is in a range of 2.400GHz to 2.4835GHz) communication technology, a WiFi (Wi-Fi, wireless communication technology) communication technology, a ZigBee, ZigBee protocol, and the like, and is not particularly limited, preferably, the display device having the Bluetooth function is a display device that can realize Bluetooth short-distance communication with an intelligent device having the Bluetooth function through a Bluetooth short-distance transmission function, and further, a Bluetooth Low Energy (or called Bluetooth Low Energy, LE) broadcast function specifically using the Bluetooth function is further provided. Of course, when other communication technologies are used, the technology with lower energy consumption in the technology is also used, and details are not described. Further, it should be noted herein that the process of generating the communication data by the display end may be preset, or may be generated in real time during the operation process; for example, when the display end is not connected to the lan or the internet, the display end needs to have a function of configuring the lan (the technology of configuring the lan is only applicable to the technology of using the technology in the field, and the present invention is not limited thereto), when configuring the lan centered around the display end, if the display end uses a fixed IP address, the set communication data is used, if the display end uses a dynamic IP address, the IP address is generated in real time according to the IP address of the current display end, and it should be noted that the real-time dynamic IP address does not change the IP address once at a predetermined time interval (regardless of the time length), but changes the IP address once at the time of starting up; at the moment, the intelligent equipment can realize screen projection operation only by accessing the IP address behind the local area network of the display terminal architecture. When the display terminal is connected to the Internet, the communication data are generated according to the IP address distributed by the Internet, the intelligent device can realize screen projection only by being connected to the Internet, and then screen projection operation can be realized by obtaining the IP address. Specifically, the display terminal also needs to have a function of responding to the screen projection operation, and the function of the screen projection operation is a common technical means in the field, and is not particularly limited.
And S2, the delivery end receives the communication data and performs screen projection operation based on the IP address. Specifically, the delivery end is preferably an electronic device having a short-distance communication function and a screen projection function, and further preferably a mobile phone, a PC, or an intelligent device having a bluetooth function and a screen projection function. Certainly, for different near field communication technologies, the working states of the delivery end have certain differences, for example, when the near field communication technology is bluetooth, the delivery end needs to be docked with the display end through bluetooth before receiving the communication data, and then receives the communication data; when the short-distance communication technology is other, the docking may not be performed or the use mode of the corresponding short-distance technology may be used, and is not particularly limited. And the delivery end receives the communication data, decodes the communication data to obtain an accurate IP address, and finally performs screen delivery operation according to the IP address.
Further, as a preferred solution, in this embodiment, the communication data includes a plurality of content tags; the content tags comprise AD TYPE used for self-definition, manufacturer ID (Identity document) used for representing manufacturer identification, and fixed IP tags used for representing physical models of display terminal equipment. Further, at least one of the content tags of the communication data comprises a plurality of bytes; for example, generally, the AD TYPE plays an important role in communication data, and determines what the communication data represents and how to parse the communication data, but since the AD TYPE is a directional inner label, the AD TYPE can be accurately expressed by only one byte, but the IP address generally has a relatively fixed format, and therefore, the AD TYPE needs four bytes to be expressed. Further, each byte in the communication data is preferably expressed by using 16-ary data, specifically, each byte is generally two bytes (bytes), that is, two bits of data can be generally displayed, so that in order to enable a single byte to express more contents, using 16-ary data is a currently preferred scheme, and more data can be expressed; of course, 32 or more may be used if desired, but only if desired.
As a preferred solution, please refer to fig. 2, in this embodiment, the generating and broadcasting communication data includes:
s11, arranging the contents of the communication data according to a preset sequence, and sequentially putting the contents into a cache; specifically, the process of generating the communication data includes two steps:
the first step is to arrange content tags (AD TYPE, fixed IP tag, manufacturer ID, IP address, etc., respectively, and specifically whether other tags are included or not, which may be set as required, and the content represented by each content tag is not fixed, and may also be modified according to corresponding directivities) included in the communication data according to a predetermined sequence, where the arrangement sequence is not limited, and may be arranged according to a sequence of-AD TYPE, fixed IP tag, manufacturer ID, and IP address, or may be arranged by exchanging part of content tags in the sequence one, and specifically is not limited; the predetermined sequence is substantially fixed in each device and does not require adjustment in the absence of other conditions; of course, each content tag can be determined according to the corresponding short-distance communication protocol when expressing specific content, so that no matter what predetermined sequence is used, after receiving the communication data, the delivery end can determine the specific content according to each content tag, for example, the IP address always points to the network IP address of the device, and the delivery end can know that the position represents the network IP address as long as the delivery end decodes the content tag of the IP address in the communication data; of course, fixed positions may also be used, for example, the communication data includes 9 bytes altogether, the first byte is AD TYPE, the second-third byte is manufacturer ID, the fourth-fifth byte is fixed IP tag, and the sixth-ninth byte is IP address, so long as the communication data can be decoded to obtain the nine bytes in sequence, the specific content of the IP address can be determined. Preferably, the arranged communication data is preferably stored in a memory, and the memory is used for storing data which can be called by an electronic device system; the Memory comprises a Read-Only Memory (ROM) and a Random Access Memory (RAM), and is further preferably a Random Access Memory; the read only memory is used only in the case where the communication data is fixed content.
The second step is to cache the communication data determined according to the predetermined sequence (cache, a high-speed memory with access speed faster than that of a general Random Access Memory (RAM)), it should be noted that the data is preferably encrypted before entering the cache, the specific encryption method is not limited, the existing bluetooth protocol can be used for encryption, and the self-set encryption protocol can also be used; further, after the communication data enters the cache, the communication data after the display is started up at this time is the communication data of the machine in the whole operation process after the display is started up at this time, and is not modified; unless the important content of the communication data is modified (for example, IP address reassignment), the important content is modified according to the regeneration of the communication data of the operating system of the display terminal.
And S12, performing round broadcasting transmission based on the communication data in the buffer.
Specifically, for example, when the display terminal is an intelligent terminal having a bluetooth function, preferably, the display terminal operates using a low energy mode in the bluetooth function, that is, the communication data is generated using a BLE mode, and the broadcast of the communication data uses a BLE mode broadcast, so as to reduce energy consumption. As will be further described below, the display terminal will bring the IP address of the display terminal to a bluetooth broadcast packet (i.e. communication data) through BLE broadcast, and broadcast the bluetooth broadcast packet externally by calling the interface of the bluetooth broadcast (the broadcast method is an existing interface, and does not need to be modified). It should be noted that, the bluetooth broadcast packet may be extended according to a bluetooth protocol, and the IP address of the display end is extended into the bluetooth broadcast packet according to the bluetooth protocol, and certainly, some data may be customized in the bluetooth broadcast packet according to the bluetooth protocol, and some formats are in bytes as follows:
specific parameters of a bluetooth broadcast packet are, for example: FF 0000495012345678. Each byte in the previous example uses a 16-ary parameter, where the first byte is FF: AD TYPE, which represents manufacturer self-defined data, and the second and third bytes are manufacturer ID and need to be applied by each manufacturer. The fourth and fifth bytes are the ascii code values for the fixed IP tag as (converted to decimal data representation): 7380 followed by an IP address, which as above corresponds to (converts to decimal data representation): 18.52.86.120.
specifically, in a state where the display end uses the bluetooth device for communication, the specific content of the format of the BLE broadcast packet is as follows:
there are two roles in BLE, Central and Peripheral, namely Central and Peripheral. The central device may actively connect with peripheral devices that transmit broadcasts or are connected by the central device. The peripheral is discovered by the central device through broadcasting, and the broadcasting carries the relevant information of the peripheral device. There are two types of broadcast packets: broadcast packets (Advertising Data) that each device must broadcast, and Response packets (Scan Response) that are optional. Each packet is 31 bytes, and the data packet is divided into two parts, namely valid data (significant) and invalid data (non-significant). Valid data portion: contains several broadcast data units, called AD Structure. The composition of the AD Structure is: the first byte is the length value Len, indicating that the next Len bytes are the data portion. The first byte of the data part represents the Type of data AD Type, and the remaining Len-1 bytes are the real data AD data. The AD type is very critical, and determines what the Data of AD Data represents and how to parse. Invalid data portion: since the length of the broadcast packet must be 31 bytes, if the valid data portion is less than 31 bytes, the remainder is complemented with 0. The foregoing is a general technical approach in the field, and the present invention is not particularly limited.
As a preferred solution, please refer to fig. 3, in this embodiment, the process of the delivery end acquiring the IP address includes:
s21, receiving and obtaining the communication data;
and S22, analyzing the communication data and putting the communication data into a cache, and obtaining the IP address content according to a preset sequence.
Specifically, the delivery end is preferably an electronic device with a short-distance communication function and a screen projection function, and certainly, when the electronic device needs to be used specifically, an operating system of the delivery end adapts to a corresponding storage function and a cache function, and the memory is used for storing data which can be called by the electronic device system; the Memory comprises a Read-Only Memory (ROM) and a Random Access Memory (RAM), and is further preferably a Random Access Memory; the read only memory is used only in the case where the communication data is fixed content. The cache function is a commonly used technical means in the art, and is not specifically limited herein. It should be noted here that when the method for encrypting data used by the display side is to use a separate protocol (i.e., a new, unknown protocol), a decoding protocol connection needs to be performed first, and after obtaining the separate protocol, the communication data is decoded. When the display end uses Bluetooth to broadcast the communication data externally, the delivery end also has a Bluetooth function correspondingly, and the communication data is received by using a data receiving mode which is universal in the field of Bluetooth technology, and simultaneously, the communication data can be decoded by using a Bluetooth protocol.
Further, as a preferable scheme, the delivery end includes a mobile phone, a PC (Personal Computer), and an electronic device having a short-range communication function and a screen projection function. As a preferred scheme, in this embodiment, the near field communication technology includes zigbee, bluetooth, and WiFi. Furthermore, the display end can simultaneously have a plurality of near field communication functions, such as simultaneously integrating the Zibee and the Bluetooth, so that the display end can be adapted to a plurality of delivery ends; the delivery end only needs to meet one of the short-distance communication technologies of the display end.
As a preferred solution, please refer to fig. 5, in this embodiment, the working modes of the display end include a single mode and a multi-mode;
the single mode is: when one delivery end executes screen projection operation, the display end does not receive screen projection operation of other delivery ends; specifically, in the foregoing description, in a working mode of the display end, that is, when the display end has one delivery end connected through bluetooth or determines an IP address therebetween, only the screen delivery operation of the current delivery end is received, that is, at this time, it is desired to modify the screen delivery content, only the currently connected delivery end is used for modification, or the current delivery end is disconnected from the display end (for example, the display end and the delivery end are connected through short-distance communication), and another delivery end is replaced to perform the screen delivery operation.
The multivariate mode is as follows: and the display end always receives screen projection operation execution of the latest delivery end. Specifically, another working mode of the display end is provided, at this time, no matter whether the display end performs the screen projection operation or not, as long as a new delivery end needs to perform the screen projection operation, the display end immediately enters the new screen projection operation, and the new screen projection requirement is timely updated, so that the timely information sharing in a multi-user conference is met.
In summary, the screen projection method provided by the invention uses the short-distance communication technology to send the IP address of the display terminal to the projection terminal, and then the projection terminal can realize the screen projection operation without manually inputting the IP address after obtaining the IP address, which is convenient and fast.
Referring to fig. 4, the present invention further provides a screen projecting system, which includes a display end and a delivery end, and completes the screen projecting method in a matching manner;
the display terminal is used for generating and broadcasting communication data based on the near field communication technology and responding to screen projection operation of the projection terminal; the communication data comprises an IP address used for representing a network interface of the display end; specifically, the display terminal is a display device having a short-distance communication function and a screen projection function, and specifically includes a first short-distance communication module and a first screen projection module, where the first short-distance communication module is configured to generate and broadcast communication data based on a short-distance communication technology, and a specific process is as described above, and is not described herein again, and certainly, the first short-distance communication module may also be configured to receive and respond to various data generated based on a short-distance communication technology, and is a common technology in the art and is not limited; the first screen projection module is used for responding to screen projection operation of the projection terminal, and further enabling the display to display screen projection contents.
And the delivery end is used for receiving the communication data and executing screen delivery operation based on the IP address. Specifically, the delivery end is an electronic device with a short-distance communication function and a screen-projecting function, and includes a second short-distance communication module and a second screen-projecting module, where the second short-distance communication module is configured to receive the communication data and perform wiring to obtain an IP address, and certainly, the second short-distance communication module may also generate and broadcast communication data, and the specific setting is the same as that of the first short-distance communication module and is not limited; the second screen projection module is configured to obtain an IP address from the first short-distance communication module, and then perform a screen projection operation based on the IP address, where a specific screen projection operation method based on the IP address may use a known technology in the art, and the present invention is not limited thereto.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (10)
1. A screen projection method, comprising:
the display terminal generates and broadcasts communication data based on the near field communication technology and responds to screen projection operation; the communication data comprises an IP address used for representing a network interface of the display end;
and the delivery end receives the communication data and executes screen delivery operation based on the IP address.
2. The screen-casting method of claim 1, wherein the communication data comprises a plurality of content tags;
the content tags comprise AD TYPE used for self-definition, vendor ID used for representing vendor identification and fixed IP tags used for representing physical models of the display terminal equipment.
3. The screen projection method of claim 2, wherein the generating and broadcasting communication data based on the near field communication technology comprises:
arranging the contents of the communication data according to a preset sequence, and sequentially putting the contents into a cache;
and performing round broadcasting transmission based on the communication data in the buffer.
4. The screen projection method of claim 3, wherein the process of obtaining the IP address by the delivery end comprises:
receiving and obtaining the communication data;
and analyzing the communication data and putting the communication data into a cache, and obtaining the IP address content according to a preset sequence.
5. The screen-projection method of claim 2, wherein at least one of the content tags of the communication data comprises a plurality of bytes.
6. The screen projection method of claim 5, wherein each byte in the communication data is expressed by using 16-ary data.
7. The screen projection method of claim 1, wherein the working modes of the display end comprise a single mode and a multi-mode;
the single mode is: when one delivery end executes screen projection operation, the display end does not receive screen projection operation of other delivery ends;
the multivariate mode is as follows: and the display end always receives screen projection operation execution of the latest delivery end.
8. The screen projection method of claim 1, wherein the close range communication technology comprises Zibee, Bluetooth and WiFi.
9. The screen projection method of claim 1, wherein the projection terminal comprises a mobile phone, a PC, and an electronic device with a short-distance communication function and a screen projection function.
10. A screen projection system is characterized by comprising a display end and a projection end;
the display terminal is used for generating and broadcasting communication data based on the near field communication technology and responding to screen projection operation; the communication data comprises an IP address used for representing a network interface of the display end;
and the delivery end is used for receiving the communication data and executing screen delivery operation based on the IP address.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114745589A (en) * | 2022-03-23 | 2022-07-12 | 青岛海信智慧生活科技股份有限公司 | Screen projection method of household equipment, target household equipment and intelligent equipment |
| CN114745589B (en) * | 2022-03-23 | 2023-10-27 | 青岛海信智慧生活科技股份有限公司 | Screen throwing method of household equipment, target household equipment and intelligent equipment |
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