Abstract: Provided is a server including a communicator, and a controller electrically connected to the communicator. The controller is configured to receive, from a plurality of personal mobilities, first information related to a battery of each of the plurality of personal mobilities through the communicator, transmit, to a first personal mobility among the plurality of personal mobilities, a first control signal for causing a first conductive coil of the first personal mobility to be switched into a state for power transmission through the communicator, based on the first information, and transmit, to a second personal mobility among the plurality of personal mobilities, a second control signal for causing a second conductive coil of the second personal mobility to be switched into a state for power reception through the communicator.

Abstract: A personal mobility and a control method are provided. The personal mobility includes: a main body; a front wheel mounted on the front end of the main body; a pair of rear wheels mounted on the rear end of the main body; an actuator configured to adjust a distance between the pair of rear wheels; an image data device mounted on the personal mobility and having a field of view outside of the personal mobility, the image data device configured to acquire image data; and a controller configured to determine at least one of user state information or external environment information based on the image data, and control the actuator to adjust the distance between the pair of rear wheels based on at least one of the user state information or the external environment information.

Abstract: An embodiment server includes a communicator configured to communicate with a personal mobility and a user terminal and a controller configured to control the communicator to transmit a rental permission signal to the personal mobility in response to receiving an authentication completion signal from the user terminal, wherein the authentication completion signal is a signal generated by the user terminal based on biometric information of a user received by the user terminal and registered biometric information stored in the user terminal.

Abstract: A towing module of a personal mobility includes: a main body provided to extend in a vertical direction and in which a battery is mounted: a driving wheel installed on a lower portion of the main body and having a driving motor: a steering handle installed on an upper portion of the main body; and a connector provided in the main body to selectively connect one of various types of modules to be towed. The main body is maintained in a standing state while driving by the connection to the module to be towed. A personal mobility and a control method thereof utilize the towing module.

Abstract: Provided is a holographic display apparatus capable of providing an expanded viewing window when reproducing a holographic image via an off-axis technique. The holographic display apparatus includes a spatial light modulator comprising a plurality of pixels arranged two-dimensionally; and an aperture enlargement film configured to enlarge a beam diameter of a light beam coming from each of the plurality of pixels of the spatial light modulator. The beam diameter of each light beam enlarged by the aperture enlargement film may be greater than the width of an aperture of each pixel of the spatial light modulator.