CN203233494U - Wireless projection apparatus based on direct connection - Google Patents
Wireless projection apparatus based on direct connection Download PDFInfo
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- CN203233494U CN203233494U CN 201320256703 CN201320256703U CN203233494U CN 203233494 U CN203233494 U CN 203233494U CN 201320256703 CN201320256703 CN 201320256703 CN 201320256703 U CN201320256703 U CN 201320256703U CN 203233494 U CN203233494 U CN 203233494U
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Abstract
The utility model discloses a wireless projection apparatus based on direct connection, and the apparatus comprises an application processing subsystem and a wireless direct-connection security transmission subsystem. The application processing subsystem comprises a processor, a power management module, a video input/output module, a memory module, and a communication interface module. The wireless direct-connection security transmission subsystem comprises a WAPI wireless security module and a wireless direct-connection module. Video transmission wires do not need to be used for transmitting video data to a projector by utilizing the wireless projection apparatus based on direct connection in a wireless manner, so the wireless projection apparatus is convenient and beautiful. Wireless multi-point access of the wireless projection apparatus is established on a Linux operating system and 802.11. The function of entity AP is achieved through software by utilizing the Direct technology in the condition of no entity AP, i.e. serving as soft AP. Equipment serving as STA constructs a direct-connection network through the soft AP. When persons want to use the projector, the projector can be freely used by turns through switchover. The wireless projection apparatus based on direct connection supports a dual-mode security access of WAPI and 802.11i.
Description
Technical field
The utility model relates to a kind of projection arrangement, specifically refers under the situation that incorporeity AP is ordered, set up direct interconnection network by wireless direct interconnection technique, carries out the device of wireless display.
Background technology
Wireless direct connection is based on the standard of 802.11 series standards, it has following characteristics: make ordinary terminal STA(Station, client) supports soft AP(Access Point, WAP (wireless access point)) role, thereby providing a kind of need not true access point and can make a plurality of terminals set up the mode of directly-connected network and then direct communication, and can not only support wireless direct-connected traditional WLAN(WLAN (wireless local area network), Wireless Local Area Networks) STA also can join in the direct interconnection network of having set up with STA role, has ensured a favorable compatibility; That it adopts when connecting is WPS(Wi-Fi Protected Setup, and Wi-Fi protects setting), can set up safe wireless network easily; In addition, wireless direct connection also allow to connect all support wireless direct-connected equipment all to enter resting state in due course, thereby save power, and in traditional WLAN, AP can not enter resting state; And its permission equipment supports concurrent connection, and namely a wireless device can add in a plurality of wireless networks with multiple identity (soft AP, STA) simultaneously.
Existing projection display apparatus adopts wired mode to carry out transfer of data usually, and modern architecture adopts the mode of concealed wire installation to handle various cables for attractive in appearance usually.Need carry out wall reconstruction during installation, wiring is complicated; In use damage as cable after the installation, keep in repair extremely difficult.And, in conference system, need use projector's projection in turn if any many people, at this moment just data wire need be received another computer, very complicated from this computer.Then there are not these problems in wireless technology, along with the development of wireless technology, adopts the wireless technology transmitting video data to carry out wireless display, has reduced cost, has improved portability.
Use this wireless direct-connected projection arrangement, greatly reduce the cost of traditional projector equipment installation and maintenance, improved portability, have broad application prospects in fields such as meeting room, home theater, multimedia teaching.
Summary of the invention
The purpose of this utility model provides a kind of wireless direct-connected projection arrangement that allows the safety that projecting apparatus is easy to use, user's experience effect is good.This device is based upon on Linux and 802.11, can allow the multi-user use projecting apparatus in turn by switching.
The technical solution adopted in the utility model is so to achieve these goals, be a kind of based on direct-connected wireless display device, comprise and use processing subsystem and wireless direct-connected safe transmission subsystem, wherein said application processing subsystem comprises processor, power management module, video output module, memory module and communication interface modules, and described wireless direct-connected safe transmission subsystem comprises WAPI wireless security module and wireless direct-connected module; Described processor is connected with the video output module of the outside output video of energy or view data, processor is connected with communication interface modules with memory module respectively by the mode of bus, communication interface modules connects WAPI wireless security module, be connected to the wireless direct-connected module that can communicate with the outside, described power management module provides operating voltage for each module.
Particularly, communication interface modules comprises the RS232 serial ports, network interface card, USB interface and SD interface; On the corresponding holding wire of UART that described RS232 serial ports is connected to processor; Described network interface card links to each other with processor by the MII standard interface; Described SD interface is connected on the Secure Digital interface of processor; Described USB interface links to each other with the USB interface of processor.The video output module comprises VGA interface, HDMI interface, DVI interface and TV interface.Wireless direct-connected module comprises radio-frequency (RF) receiving and transmission module and antenna.
The technique effect that this practical projection arrangement has owing to said structure is very tangible, namely when the use of projecting apparatus, can not pass through cable, be that projecting apparatus no longer needs to use video transmission line such as cables such as VGA, HDMI, the user can break away from restraining of cable in use.This wireless multipoint inserts projection arrangement and is based upon on (SuSE) Linux OS and 802.11, uses the Direct technology, under the situation that does not have entity A P to order, can realize the function of entity A P by software, namely serve as soft AP, the equipment that serves as STA role can pass through soft AP, sets up direct interconnection network.Support the safe access way of WAPI and 802.11i bimodulus.The user can insert by multiple spot in use, can allow the multi-user use projecting apparatus in turn by switching, and is easy to use, by using wireless technology, makes projecting apparatus reduce connecting line in use, simple and attractive in appearance.When many people need use projecting apparatus, by switching, be free to use in turn.
Description of drawings
Device of the present utility model can further specify by the indefiniteness embodiment that accompanying drawing provides.
Fig. 1 is the structured flowchart of the wireless direct-connected projection arrangement of the utility model;
Fig. 2 is the communication interface modules schematic diagram;
Fig. 3 is wireless direct-connected module principle figure;
Fig. 4 is application scenarios figure of the present utility model;
Among the figure 1, the 1-processor; The 2-power management module; 3-video output module; The 4-memory module; The 5-communication interface modules; 6-WAPI wireless security module; Direct-connected module that 7-is wireless;
Among Fig. 4,4.1-is wireless direct-connected projection arrangement; 4.2-video sending end.
Embodiment
The utility model is described in further detail below in conjunction with embodiment that accompanying drawing provides:
As shown in Figure 1, the utility model comprises application processing subsystem and wireless direct-connected safe transmission subsystem; Wherein use processing subsystem and comprise processor 1, power management module 2, video output module 3, memory module 4 and communication interface modules 5, wireless direct-connected safe transmission subsystem comprises WAPI wireless security module 6 and wireless direct-connected module 7.
Described processor 1 is connected with communication interface modules 5 with memory module 4 by the mode of bus, and is connected with WAPI wireless security module 6 by communication interface modules 5, is connected to wireless direct-connected module 7; Communicated by wireless direct-connected module 7 and outside, and the video data that receives is sent to the application processing subsystem, after treated device 1 is handled, deliver to video output module 3.
Described power management module 2 provides operating voltage for other modules.
In the embodiment of the indefiniteness that accompanying drawing provides, described processor 1 uses the Cortex-A8 processor S5PV210 of Samsung, dominant frequency 1GHz, integrated NFC (Nand Flash Controller in these processor chips, Nand Flash processor), the standard interface of a Nand Flash is provided, link to each other with the NAND Flash K9F4G08U0B of Samsung by this standard interface, and I/O 0 ~ I/O 7 pins of described NAND Flash K9F4G08U0B link to each other with data/address bus DATA0 ~ DATA7 of S5PV210 by bus run 0, send the address by data/address bus, order and data.The DDR2 SDRAM that the utility model uses is the K4T1G164QF-BCE7 of Samsung, frequency is 800MHz, capacity is that 64M * 16b is 1Gb, using 4 K4T1G164QF-BCE7 to form data bit width in this example altogether is 32, capacity is the storage system of 4Gb, wherein per 2 K4T1G164QF-BCE7 parallel connections, expand to 32 data, be connected respectively to bus run 1 and 2 by 13 row address lines and 10 column address conductors and 32 data lines then, link to each other with described processor then, can satisfy Video processing like this to the requirement of high bandwidth and big capacity storage.Above-described Nand Flash and DDR2 SDRAM have constituted memory module 4 of the present utility model.
The video data that is received by wireless direct-connected module 7 enters the application processing subsystem by WAPI wireless security module 6 and communication interface modules 5, and 1 pair of video data of the processor in the described application processing subsystem is handled, and is transferred to video output module 3 then.As use the VGA interface as the video output channel, also to use CH7034B to carry out the D/A switch of data.
Described power management module is managed by PMIC WM8310 chip, supports the adjustment of charging and DVS dynamic electric voltage, and the power supply that needs is provided for each module.
The communication interface modules 5 that links to each other with described processor is made up of RS232 serial ports, network interface card, SD interface and USB interface four parts as shown in Figure 2.Described RS232 serial ports has been selected for use MAX3232 to carry out level conversion and has been connected on the corresponding holding wire of UART1 of described processor.Be used for finishing communicating by letter between projection arrangement and PC.Described network interface card is partly selected for use DM9000AEP to be used as the network interface control chip and is finished, and links to each other with processor 1 by the MII standard interface.Described SD interface is connected on the Secure Digital interface of processor, is used for finishing the expansion of storage capacity of projection arrangement.Described USB interface directly links to each other with the USB HOST interface of processor.
The wireless direct-connected module 7 that is connected with WAPI wireless security module 6 in this device is made up of radio-frequency (RF) receiving and transmission module and antenna, and its connected mode as shown in Figure 3.Described WAPI wireless security module 6 adopts the HED05W01SU of the big electronics of China, enter this chip by processor 1 data processed by USB interface, portion finishes the safe handling of data within it, be transferred to RF chip AL2230 by BBP_AFE control interface and BBP_RF interface again, launch by antenna then, its receiving course is the opposite of above process.Also comprise software section, software section refers on this basis with software simulation and realizes AP role in 802.11 networks namely serving as soft AP, and being embodied as other wireless communication terminal provides entity A P function.
The application scenarios of the wireless direct-connected projection arrangement of the utility model as shown in Figure 4, after wireless direct-connected projection arrangement 4.1 starts, under the situation of incorporeity AP, the operation corresponding software, serve as soft AP role, video sending end 4.2 by this soft AP, is set up direct interconnection network as notebook computer, portable terminal etc., is connected to wireless direct-connected projection arrangement.Just can carry out the image transmission then, and then projection.
Claims (4)
1. one kind based on direct-connected wireless display device, it is characterized in that: comprise and use processing subsystem and wireless direct-connected safe transmission subsystem, wherein said application processing subsystem comprises processor (1), power management module (2), video output module (3), memory module (4) and communication interface modules (5), and described wireless direct-connected safe transmission subsystem comprises WAPI wireless security module (6) and wireless direct-connected module (7); Described processor (1) is connected with the video output module (3) of the outside output video of energy or view data, processor (1) is connected with communication interface modules (5) with memory module (4) respectively by the mode of bus, communication interface modules (5) connects WAPI wireless security module (6), be connected to the wireless direct-connected module (7) that can communicate with the outside, described power management module (2) provides operating voltage for each module.
2. described based on direct-connected wireless display device according to claim 1, it is characterized in that: described communication interface modules (5) comprises the RS232 serial ports, network interface card, USB interface and SD interface; Described RS232 serial ports is connected on the corresponding holding wire of UART of processor (1); Described network interface card links to each other with processor (1) by the MII standard interface; Described SD interface is connected on the Secure Digital interface of processor (1); Described USB interface links to each other with the USB interface of processor (1).
3. according to claim 1 or 2 described based on direct-connected wireless display device, it is characterized in that: described video output module (3) comprises VGA interface, HDMI interface, DVI interface and TV interface.
4. described based on direct-connected wireless display device according to claim 1, it is characterized in that: described wireless direct-connected module (7) comprises radio-frequency (RF) receiving and transmission module and antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320256703 CN203233494U (en) | 2013-05-13 | 2013-05-13 | Wireless projection apparatus based on direct connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320256703 CN203233494U (en) | 2013-05-13 | 2013-05-13 | Wireless projection apparatus based on direct connection |
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| CN203233494U true CN203233494U (en) | 2013-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320256703 Expired - Fee Related CN203233494U (en) | 2013-05-13 | 2013-05-13 | Wireless projection apparatus based on direct connection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104506789A (en) * | 2014-12-19 | 2015-04-08 | 天脉聚源(北京)传媒科技有限公司 | Projection method and device |
| CN105376635A (en) * | 2014-08-08 | 2016-03-02 | 株式会社理光 | Projection device, projection system, and projection method |
| CN106921841A (en) * | 2017-03-07 | 2017-07-04 | 北京小米移动软件有限公司 | Screen prjection method and device |
| CN107290925A (en) * | 2014-09-08 | 2017-10-24 | 吴红平 | Using the method for work of the projection control system of the soft AP projecting apparatus controlled |
-
2013
- 2013-05-13 CN CN 201320256703 patent/CN203233494U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105376635A (en) * | 2014-08-08 | 2016-03-02 | 株式会社理光 | Projection device, projection system, and projection method |
| CN107290925A (en) * | 2014-09-08 | 2017-10-24 | 吴红平 | Using the method for work of the projection control system of the soft AP projecting apparatus controlled |
| CN104506789A (en) * | 2014-12-19 | 2015-04-08 | 天脉聚源(北京)传媒科技有限公司 | Projection method and device |
| CN106921841A (en) * | 2017-03-07 | 2017-07-04 | 北京小米移动软件有限公司 | Screen prjection method and device |
| CN106921841B (en) * | 2017-03-07 | 2019-12-13 | 北京小米移动软件有限公司 | screen projection method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 |