| 摘要 |
This invention relates to a phosphorescent device for use in for instance a light box for a meeting hall for indication of an exit out of the same. According to the invention the device comprises a translucent fabric (6) of a special material which at least on its one side is coated with a layer (7) of luminous colour having the ability to absorbe and store light so that, if the light surrounding the device should die out, the device continues to light during a relatively long time after that. |
