Abstract: A stereoscopic display device including a barrier panel is provided. When a viewing distance of a viewer is out of the proper range, the stereoscopic display device may shift the blocking regions and the transmitting regions of the barrier panel. The stereoscopic display device may maintain the ratio of channels located within a barrier blocking region and a barrier transmitting region of the barrier panel by using the channels disposed within trigger regions of the barrier panel. Thus, the stereoscopic display device may provide a stereoscopic image of good quality to the viewer located at a region being out of the proper range.

Abstract: A terminal, server, system, and method for providing private tag information by the terminal accessible to the server through a wired/wireless communication network are provided. The method includes recognizing an object, detecting private tag information related to the recognized object, the private tag information including a sharing range, and outputting the detected private tag information.