| abstract |
Head-mounted displays, smartphones, tablet terminals, e-books, etc. monitor the situation on the power generation device side that stores batteries. The image display device is equipped with power generation information acquisition means for acquiring power generation information such as the storage amount and power generation amount of the secondary battery in each power generation device, and the acquired information is appropriately processed to the user via the display unit. Present. The user can confirm the power generation amount in the power generation device and the storage amount of the secondary battery without interrupting the use of the image display device. In addition, when the amount of electricity stored in the battery in use decreases, the user can accurately determine which power generation device and battery to replace. |