| 摘要 |
The proposed tool for visual communication can be used for making billboards, in educational systems for displaying of drawings, graphics, tutorials, etc. It can be used to reflect topical proposals and messages intended for an unlimited number of people, where there is a need for frequent updating of the information text and/or graphics. The drawing of the displayed image (text or graphics) is done with fluorescent markers or paints applied to the transparent plate (3) of the text box, and these markers or paints can be erased easily and the user can write/draw again. The different colours of light are provided by a semiconductor (RED / GREEN / BLUE) light source. An electronic controller (8) provides possibility for different effects of light - blinking, gradual transition from one colour to another, mixing several colours, etc. The advantages of this solution are that there is possibility for multiple, quick and easy change, both of the content of text and the lit colour of the text.
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