An head mounted display (HMD) including an image display unit, a camera, a storage unit configured to store information about an image of a object and character information in association with the image of the object, an image detection unit configured to detect an image of a object from a captured image of the camera, a character string generating unit configured to retrieve character information in association with the image of the object detected by the image detection unit from the storage unit, and to arrange a character or character string represented by the retrieved character information in detection order of the object to generate a character string, and an input controller configured to input the character string generated by the character string generating unit to an input area arranged in a user interface.