Abstract: A movement-based data input device is configured to receive at least one reflected signal generated upon reflection of at least one optical signal by blood vessels of an object. The data input device may generate pattern information regarding the blood vessels of the object based on the received reflected optical signal. The data input device may determine a user input motion based on the pattern information.

Abstract: Disclosed is a wearable device. The wearable device includes an optical signal transmission unit configured to transmit optical signals, an optical signal sensing unit configured to receive reflected optical signals, a data processing unit configured to process the reflected optical signals, and a coordinate generating unit configured to generate 3-dimensional coordinate from the processed data.

Abstract: Disclosed is a wearable device. The wearable device includes an optical signal transmission unit configured to transmit optical signals, an optical signal sensing unit configured to receive reflected optical signals generated upon reflection of the optical signals by an object, a data processing unit configured to process the received reflected optical signals, and a key determination unit configured to sense a user's key input motion based on data acquired by processing the reflected optical signals and to generate an input value matching the key input motion.

Abstract: Disclosed is a wearable device. The wearable device includes an optical signal transmission unit configured to transmit optical signals, an optical signal sensing unit configured to receive reflected optical signals, a data processing unit configured to process the reflected optical signals, and a coordinate generating unit configured to generate 3-dimensional coordinate from the processed data.