| 摘要 |
PROBLEM TO BE SOLVED: To provide a display device which protects a digital literary work in the case except protection of a literary work in communication such as television broadcasting and the Internet.SOLUTION: A display device has a function and a shape for limiting a display destination only to human eyes and limiting an output destination of a literary work inside the device only to the display device 1 by identifying the human eyes by a power supply such as a battery, a sensor and a controller, and when change with a possibility that the function and the shape cannot be maintained is detected, functions so as to stop display, to eliminate or physically destructs the literary work inside, respectively. A basic shape for the purpose is like a rectangular parallelepiped box 2 with the size for completely covering the surroundings of the eyes. |
