OPTICAL WIRELESS COMMUNICATION DEVICE, OPTICAL WIRELESS COMMUNICATION METHOD, AND OPTICAL WIRELESS COMMUNICATION SYSTEM

PROBLEM TO BE SOLVED: To enable, in optical wireless communication, stable data communication without requiring an instruction to change speed of information transmission from the reception side to the transmission side even in the case that a communication state has changed.SOLUTION: There is provi...

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Bibliographische Detailangaben
Hauptverfasser: NOZAWA SHOGO, UENO SHUNJI, SHIBATA YUJI, TAKEUCHI TOMOAKI, SHIBAGAKI TARO
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To enable, in optical wireless communication, stable data communication without requiring an instruction to change speed of information transmission from the reception side to the transmission side even in the case that a communication state has changed.SOLUTION: There is provided, on the transmission side, a transmitter 100 including: display means capable of displaying information by an optical pattern corresponding to a two-dimensional code; means for converting transmission information to two-dimensional encoded data to be displayed by using the optical pattern; means for converting the transmission information to time series data; means for superposing the time series data on the two-dimensional encoded data so that intensity modulation based on the time series data is performed on the optical pattern; and means for driving the display means on the basis of the superposed data. There is provided, on the reception side, a receiver 200 including: a camera 210 for imaging the display means; means for reading an optical pattern from video imaged by the camera to restore transmission information; and means for restoring the transmission information from an intensity modulation state of the optical pattern.SELECTED DRAWING: Figure 1 【課題】光無線通信において、通信状態が変化した場合においても、受信側から送信側への情報伝送速度の変更指示を要さずに、安定したデータの通信を可能にする。【解決手段】送信側には、情報を2次元コードに対応した光パターンで表示可能な表示手段と、送信情報を光パターンで表示させるための2次元符号化データに変換する手段と、送信情報を時系列データに変換する手段と、光パターンが時系列データに基づいて強度変調されるように、2次元符号化データと時系列データとを重畳する手段と、そのデータに基づいて前記表示手段を駆動する手段と、を有する送信装置100を設ける。受信側には、表示手段を撮影するカメラ210と、カメラが撮影した映像から光パターンを読取って送信情報を復元する手段と、光パターンの強度変調状態から送信情報を復元する手段と、を有する受信装置200を設ける。【選択図】図1