| 摘要 |
<p>The invention concerns an electronic display device (20) comprising a display unit (21) characterized in that said display unit (21) is permanent such that no energy is required for maintaining the display unchanged, said display device (20) being created by interaction between two elements, such as by friction or percussion, thereby generating an electric pulse, said pulse being processed by an electronic circuit (25) prior to being sent to the display unit (21) to modify its display.</p> |
