公开(公告)号：US20130258209A1

公开(公告)日：2013-10-03

申请号：US13828749

申请日：2013-03-14

Applicant: CANON KABUSHIKI KAISHA

Inventor： LIONEL TOCZE ,  PIERRE VISA ,  PASCAL LAGRANGE

IPC: H04N9/31

CPC classification number: H04N9/31 ,  G01S1/00 ,  H04N9/12 ,  H04N9/3147 ,  H04W84/20

Abstract: The present invention relates to improving configuration of wireless communication paths between devices in a video projection system comprising multiple wireless video projectors. When an initial radio communication setup is required between a managing node, e.g. a node comprising a master projector, and a node comprising a slave projector, for example following the powering up of the video projection system, the slave node receives setup information by radio communication means according to a sweeping sequence and transmits information by projecting sub-images. Sub-images advantageously comprise information relative to settings of the master node allowing reception in the corresponding slave node of a radio signal transmitted by the master node.

Abstract translation: 本发明涉及改进包括多个无线视频投影仪的视频投影系统中的设备之间的无线通信路径的配置。 当在管理节点之间需要初始无线电通信建立时，例如， 包括主投影仪的节点和包括从属投影仪的节点，例如在视频投影系统的上电之后，从节点根据扫描序列接收无线电通信装置的建立信息，并通过投影子图像来发送信息 。 子图像有利地包括关于主节点的设置的信息，允许在对应的从节点中接收由主节点发送的无线电信号。

公开(公告)号：US20220239891A1

公开(公告)日：2022-07-28

申请号：US17580420

申请日：2022-01-20

Applicant: CANON KABUSHIKI KAISHA

Inventor： YACINE EL KOLLI ,  ROMAIN GUIGNARD ,  TRISTAN HALNA DU FRETAY ,  LIONEL TOCZE

IPC: H04N13/296 ,  H04J3/06

Abstract: The present invention relates to a method for generating control signals for an image capture device, the method being performed in a communication device comprising a first slave time generator and a second slave time generator, the communication device being connected to a first remote time server and a second remote time server, the method comprising: synchronizing the first slave time generator with the first remote time server; synchronizing the second slave time generator with the second remote time server; generating a first control signal based on the first clock, and sending the first control signal to the image capture device; and upon detecting a loss of synchronization between the first slave time generator and the first remote time server, generating a second control signal based on the second clock, and sending the second control signal to the image capture device.