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    • 2. 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。
    • 4. 发明授权
    • Methods and apparatus for ultrasound imaging
    • 超声成像的方法和装置
    • US08951198B2
    • 2015-02-10
    • US13608453
    • 2012-09-10
    • Tadashi Tamura
    • Tadashi Tamura
    • A61B8/00
    • A61B8/085A61B8/485A61B8/488G01S7/52042G01S7/5209G01S7/52095
    • A first ultrasound pulse is applied to biological tissue to create shear waves in the biological tissue, a focused ultrasound pulse is transmitted into the biological tissue, one or more ultrasound signals is received from the biological tissue, and shear waves are detected in the biological tissue based on the received one or more ultrasound signals. At least one propagation property associated with the detected shear waves is determined, and the determined at least one propagation property is displayed. A strain image is obtained by either acoustic radiation forces or mechanical compression, e.g., by an ultrasound probe. The strain image is then converted to a new shear wave velocity image by using a previously-obtained shear wave velocity image.
    • 将第一超声脉冲施加到生物组织以在生物组织中产生剪切波,将聚焦的超声脉冲传输到生物组织中,从生物组织接收一个或多个超声信号,并在生物组织中检测剪切波 基于所接收的一个或多个超声信号。 确定与检测到的剪切波相关联的至少一个传播属性,并且显示所确定的至少一个传播属性。 通过声辐射力或机械压缩获得应变图像,例如通过超声探头。 然后通过使用先前获得的剪切波速度图像将应变图像转换成新的剪切波速度图像。
    • 5. 发明授权
    • Methods and apparatus for ultrasound imaging
    • 超声成像的方法和装置
    • US08366624B1
    • 2013-02-05
    • US12475948
    • 2009-06-01
    • Tadashi Tamura
    • Tadashi Tamura
    • A61B8/00
    • A61B8/488A61B8/5207A61B8/5269G01S15/8986
    • Some embodiments include acquisition of color Doppler data associated with a pulse repetition frequency (fPRF) and a baseline shift, detection of a first area of the color Doppler data representing zero flow velocity, detection of a second area of the color Doppler data, detection of a first transition between one or more velocities of the second area and one or more velocities of an adjacent third area of the color Doppler data, detection of a second transition between the third area and an adjacent fourth area of the color Doppler data representing non-zero flow velocities in the first direction, subtraction of a velocity corresponding to fPRF from each of the flow velocities of the third area if the second direction is positive, and addition of the velocity corresponding to fPRF to each of the flow velocities of the third area if the second direction is negative.
    • 一些实施例包括获取与脉冲重复频率(fPRF)和基线偏移相关联的彩色多普勒数据,检测表示零流速的彩色多普勒数据的第一区域,检测彩色多普勒数据的第二区域,检测 所述第二区域的一个或多个速度与所述彩色多普勒数据的相邻第三区域的一个或多个速度之间的第一转换,检测所述彩色多普勒数据的第三区域和相邻第四区域之间的第二转变, 如果第二方向为正,则从第三区域的每个流速减去对应于fPRF的速度,并且将对应于fPRF的速度加到第三区域的每个流速上 如果第二个方向为负。