VISIBILITY ANGLE CONTROL DEVICE, DISPLAY DEVICE, CONTROL METHOD OF VISIBILITY ANGLE CONTROL DEVICE, VISIBILITY ANGLE CONTROL PROGRAM, AND RECORDING MEDIUM HAVING THE PROGRAM RECORDED THEREIN

摘要

A control unit of a mobile telephone controls a visibility angle changing unit for changing the visibility angle of an image display unit. The control unit controls the visibility angle of the image display unit on the basis of the situations of using various devices. Specifically, the control unit includes a used device detecting unit for detecting the use of a device, a storage unit for storing a device-visibility angle corresponding table containing the corresponding relation between the used device and the visibility angle, a visibility angle retrieving unit for retrieving the visibility angle corresponding to the device, the use of which is detected by the used device detecting unit, from the table, and a visibility angle control unit for controlling the visibility angle changing unit on the basis of the visibility angle retrieved by the visibility angle retrieving unit. As a result, the control of the visibility angle, which is automatically made according to the using situations, can be realized with less settings.