| 摘要 |
PROBLEM TO BE SOLVED: To provide a projection screen having a loudspeaker function and capable of being wound and stored. SOLUTION: A loudspeaker formed from a piezoelectric film both side of which are laminated with electrode films is stacked to either of the back or front of the main body of a sheetlike screen and thereby the projection screen is obtained. In this case, it is preferable that the piezoelectric film is formed from a polyvinylidene fluoride resin and the electrode films is formed from vapor-deposited aluminum. COPYRIGHT: (C)2007,JPO&INPIT
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