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    • 119. 发明公开
    • Key-based protected image data projection
    • SchlüsselbasiertegeschützteProjektion von Bilddaten
    • EP2259188A2
    • 2010-12-08
    • EP10177911.4
    • 2003-05-22
    • Seiko Epson Corporation
    • Sato, MinoruKubota, Shinji
    • G06F13/00
    • G06F21/31H04L61/2015H04L67/38H04N1/00222H04N1/00233H04N1/00244H04N1/00249H04N1/32765H04N1/32767H04N1/32786H04N2201/0015H04N2201/0039H04N2201/0055H04N2201/0089H04N2201/3207H04N2201/3273
    • There has been a problem of necessitating a complicated work for establishing a connection capable of intercommunication between a computer as server and a projector as client.
      When a connection is established between a server 20 and projectors 301 through 30n, a communication command is issued according to UDP-based broadcasting to retrieve connectable projectors 301 through 303. Thereafter, the projector 301 to be connected is selected and is assigned an IP address to establish the connection. In this manner, a user can easily obtain a connection environment capable of intercommunication between the server 20 and the projector 301. A TCP/IP communication command is used to input or output image data, ensuring reliable transmission. Since the authentication can be provided using a keyword projected during the connection establishment, it is possible to prevent an unauthorized access to the projector 301 by an outsider.
    • 存在如下问题:需要复杂的工作来建立能够作为服务器的计算机和作为客户机的投影仪之间的相互通信的连接。 当在服务器20和投影仪301至30n之间建立连接时,根据基于UDP的广播发出通信命令以检索可连接的投影仪301至303.此后,选择要连接的投影仪301并且分配IP地址 建立连接。 以这种方式,用户可以容易地获得能够在服务器20和投影仪301之间进行相互通信的连接环境。使用TCP / IP通信命令来输入或输出图像数据,确保可靠的传输。 由于可以使用在连接建立期间投影的关键字来提供认证,所以可以防止外部人员未经授权的访问投影仪301。