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    • 3. 发明授权
    • Speaker system with image projection screen
    • 带影像投影屏的扬声器系统
    • US5025474A
    • 1991-06-18
    • US249954
    • 1988-09-27
    • Tsuneo TanakaKazue SatoHiroyuki TakewaAkira KurozukaTadashi TamuraKatsuji HattoriSatoshi TakayamaKosaku MurataKatsuaki SatohMituhiko SerikawaYouichi KimuraShuichi Obata
    • Tsuneo TanakaKazue SatoHiroyuki TakewaAkira KurozukaTadashi TamuraKatsuji HattoriSatoshi TakayamaKosaku MurataKatsuaki SatohMituhiko SerikawaYouichi KimuraShuichi Obata
    • G03B21/56H04R1/02H04R7/04H04R9/06
    • H04R1/02G03B21/565H04R7/04H04R9/063
    • A speaker system has an acoustic diaphragm and an image projection screen provided on a surface of the diaphragm integrally therewith so as to enable the user to enjoy both realistic image on the screen and powerful sound reproduced through the diaphragm. The rear surface of the diaphragm is closed at a peripheral portion thereof while the central portion of the rear surface of the diaphragm is opened to the exterior, so that the speaker system can provide a high level of reproduced sound pressure in low-pitched region, while the thickness of the speaker is reduced remarkably. The diaphgram can be driven by a plurality of driving units so that the speaker system can operate only with an ordinary stereophonic amplifier. The diaphragm can be composed of a pair of diaphragm elements capable of vibrating independently of each other and the screen may be integrally and commonly attached to the surfaces of these diaphragm elements in such a manner as to allow the diaphragm elements to vibrate independently of each other, whereby the speaker system can operate in stereophonic mode. Any variation in the acoustic characteristic attributable to variation in the condition of installation is compensated for by a change in the ratio of the opened area of the rear surface of the diaphragm to the whole effective vibration area or by a selective provision of a sound absorbing member on the rear side of the cabinet.
    • 扬声器系统具有隔膜和与其一体地设置在隔膜表面上的图像投影屏幕,以使用户能够欣赏屏幕上的逼真图像和通过隔膜再现的强大声音。 隔膜的后表面在其周边部分封闭,同时隔膜的后表面的中心部分向外开放,从而扬声器系统可以在低音区域提供高水平的再现声压, 而扬声器的厚度显着降低。 可以通过多个驱动单元来驱动该图像,使得扬声器系统只能用普通的立体声放大器操作。 隔膜可以由能够彼此独立地振动的一对隔膜元件构成,并且屏幕可以一体地并且共同地附接到这些隔膜元件的表面,以允许隔膜元件彼此独立地振动 由此扬声器系统可以以立体声模式操作。 通过改变隔膜后表面的开口面积与整个有效振动面积之间的比例,或通过选择性地设置吸音构件来补偿由于安装条件的变化引起的声学特性的任何变化 在机柜的后侧。