| 摘要 |
An electronic display device ( 20 ) including a display member ( 21 ), said device being characterized in that said display member ( 21 ) is permanent so that no energy is required to keep the display unchanged, said display device ( 20 ) operating without a battery, the energy required to change the display being created by interaction between two elements, such as by friction or by an impact, thereby creating an electric pulse, said pulse being processed by an electronic circuit ( 25 ) before being applied to the display member ( 21 ) in order to change its display. |
