| 摘要 |
A bookmark 1 includes a light sensor 2 that is positioned on the bookmark 1 to be out of the light when placed inside of a book. Allowing light onto the light sensor 2 through the opening of the book activates a computer graphical display screen 3 on the bookmark 1 to display a written message or image and an audio speaker 4 to relay an audio message or song. The bookmark 1 can be made to only include only the light sensor 2 and computer graphical display screen 3 (see FIG. 6 ) or the light sensor 2 and audio speaker 4(see FIG. 7 ) or a combination of the light sensor 2 , computer graphical display screen 3 and audio speaker 4. |
