In [8], an application of controlling robots by a display device is introduced. They have not dealt with improvement in the synchronization accuracy of a virtual object in a mobile device screen. We developed a fast generation method [9] of a 2D code on a TV using data broadcasting [10], but the 2D code is too static to be used for a accurate synchronization. Even if the time code is introduced into TV program by visible light communication [11] with a display, synchronization in the mobile device screen is not necessarily accurate by a delay element such as decoding and buffering (see the chapter IV-A). This problem is not only by visible light communication but also by a general synchronization method for multi-device,such as [12]. Therefore, we target more accurate synchronization in the mobile device screen.