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公开(公告)号：US4154505A
公开(公告)日：1979-05-15
申请号：US778109
申请日：1977-03-16
申请人： Yasuo Kato , Akio Kumada
发明人： Yasuo Kato , Akio Kumada
CPC分类号： G02F1/055
摘要： In an electro-optical light shutter device using a solid-solution ceramic material for alternate transmission and interception of light, a first voltage is applied to the solid-solution ceramic material in the operating (open) position of the shutter, and a second voltage of polarity opposite to that of the first voltage and having an absolute value smaller than that of the first voltage is applied to the solid-solution ceramic material in the non-operating (closed) position of the shutter. The solid-solution ceramic material has a composition in which a ferroelectric phase and a non-ferroelectric phase adjoin each other through a morphotropic phase boundary.
摘要翻译： 在使用固溶陶瓷材料用于交替传输和截取光的电光光闸装置中，在快门的操作（打开）位置中将固体陶瓷材料施加第一电压，并且将第二电压 极性与第一电压的极性相反，并且具有比第一电压的绝对值小的绝对值施加到快门的非操作（关闭）位置的固溶陶瓷材料。 固溶陶瓷材料具有其中铁电相和非铁电相通过相位相边界彼此连接的组成。
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2.发明授权
公开(公告)号：US4496247A
公开(公告)日：1985-01-29
申请号：US454531
申请日：1982-12-30
申请人： Akio Kumada
发明人： Akio Kumada
IPC分类号： G02F1/1343 , G04G13/02 , G04C21/16
CPC分类号： G04G13/021 , G02F1/13439
摘要： Disclosed is a display device including a transparent piezoelectric element having transparent electrodes coated on both surfaces thereof, bonded by transparent adhesive material on an inner surface of a transparent cover to be arranged in front of a display panel of the display device. The transparent cover works as a vibration generator of a sound source. The thickness of the transparent electrodes are selected to serve as an anti-reflection layer of the near ultraviolet light. Relative dimensions of and positional relation between the transparent cover and the piezoelectric element are limited in predetermined ranges to assure high quality of display characteristic and sufficient volume of sound.
摘要翻译： 公开了一种显示装置，其包括透明压电元件，其透明电极涂覆在其两个表面上，通过透明粘合剂材料粘结在透明盖的内表面上，以布置在显示装置的显示面板的前面。 透明盖用作声源的振动发生器。 选择透明电极的厚度作为近紫外光的防反射层。 透明盖和压电元件的相对尺寸和位置关系被限制在预定范围内，以确保显示特性和足够音量的高品质。
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公开(公告)号：US4392747A
公开(公告)日：1983-07-12
申请号：US199976
申请日：1980-10-23
申请人： Akio Kumada , Takahiko Ihochi , Makoto Homma , Masashi Tanaka
发明人： Akio Kumada , Takahiko Ihochi , Makoto Homma , Masashi Tanaka
IPC分类号： H04R17/10 , G04G13/02 , G09F27/00 , G10K9/12 , G10K9/122 , G10K13/00 , G04C23/02 , G04C21/16
CPC分类号： G10K13/00 , G04G13/021
摘要： A display device structure comprising a casing, a display panel placed in the casing, a transparent covering and vibrating plate member on the front side of the display panel and an actuator for the plate member. The covering and vibrating plate member is carried on the casing through an elastic member interposed between the peripheral portion of the plate member and the casing. By this arrangement the plate member is capable of effectively generating sound outward upon reception of vibrating force from the actuator.
摘要翻译： 一种显示装置结构，包括壳体，放置在壳体中的显示面板，在显示面板的前侧上的透明覆盖物和振动板构件以及用于板构件的致动器。 覆盖振动板构件通过插入在板构件的周边部分和壳体之间的弹性构件承载在壳体上。 通过这种布置，板构件能够在从致动器接收到振动力时有效地产生声音。
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4.发明授权
公开(公告)号：US4046455A
公开(公告)日：1977-09-06
申请号：US626995
申请日：1975-10-29
申请人： Akio Kumada , Hiroshi Takano , Yoshizumi Eto , Masao Hibi
发明人： Akio Kumada , Hiroshi Takano , Yoshizumi Eto , Masao Hibi
摘要： An element in which only a single domain-wall can move sidewise, having a crystal plate of an irregular ferroelectric which is cut in the Z-plane at opposite surfaces and is then cut or cleaved in the direction at its periphery and transparent electrodes for the polarization reversal provided at the central portions of the opposite Z-planes. The element includes at least a domain configuration such that two nucleus regions of opposite polarities are disposed on opposite sides of the region, i.e., a domain having a stationary polarity, where the electrodes are provided.
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公开(公告)号：US3990057A
公开(公告)日：1976-11-02
申请号：US546928
申请日：1975-02-04
申请人： Akio Kumada
发明人： Akio Kumada
CPC分类号： G11C27/02
摘要： For recording analog information, a voltage is applied to a ferroelectric material plate as a synchronizing signal, the voltage having an amplitude equal at least to that of the threshold voltage for switching the polarization of the ferroelectric material plate and having a time width which is greater than the switching period of the polarization of the ferroelectric material, corresponding to the amplitude. A quantity of switching charge is modulated in proportion to the gradation of the analog information signal, the switching charge flowing through an external circuit which is connected in series with a ferroelectric material plate.
摘要翻译： 为了记录模拟信息，向铁电材料板施加电压作为同步信号，其电压至少等于用于切换铁电材料板的极化的阈值电压的振幅，并且具有更大的时间宽度 比铁电材料的极化的切换期间对应于振幅。 与模拟信息信号的灰度成比例地调制开关电荷量，流过与铁电体板串联连接的外部电路的开关电荷。
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公开(公告)号：US4367426A
公开(公告)日：1983-01-04
申请号：US245433
申请日：1981-03-19
申请人： Akio Kumada , Takahiko Ihochi , Masashi Tanaka , Kazuma Suzuki , Masaru Yokosuka , Shinsuke Miura , Tsutomu Ochiai
发明人： Akio Kumada , Takahiko Ihochi , Masashi Tanaka , Kazuma Suzuki , Masaru Yokosuka , Shinsuke Miura , Tsutomu Ochiai
IPC分类号： H04R17/00 , C04B35/49 , C04B35/491 , G04C21/02 , G04G13/02 , G09F9/30 , G10K9/122 , G10K13/00 , H01L41/187 , H03H9/17 , H03H9/58 , H01L41/08
CPC分类号： H03H9/176 , C04B35/491 , G04G13/021 , G10K9/122 , H01L41/1876 , H03H9/581
摘要： Disclosed is a transparent piezoelectric transducer comprising, at least, a transparent vibrator and at least one plate of a piezoelectric ceramic material sandwiched between a pair of transparent electrodes, said transparent vibrator being disposed so as to be vibrated by the piezoelectric ceramic material plate, said piezoelectric ceramic material being a ceramic material which is represented by a formula:Pb.sub.1-x La.sub.x (Zr.sub.y Ti.sub.z).sub.1-x/4 0.sub.3where x and y/z are set within a region enclosed with lines successively coupling points a-b-c-d-e-a in a phase diagram (FIG. 2 of the accompanying drawings) in which a ratio (y/z) between PbZrO.sub.3 and PbTiO.sub.3 is taken on an axis of abscissas, while an La concentration (x) is taken on an axis of ordinates (where x=8.4 and y/z=65/35 at a, x=6 and y/z=55.5/44.5 at b, x=6 and y/z=50/50 at c, x=12 and y/z=50/50 at d, and x=9 and y/z=65/35 at e). The transparent transducer is excellent in both the transparency and the electroacoustic response.
摘要翻译： 公开了一种透明压电换能器，至少包括透明振动器和夹在一对透明电极之间的压电陶瓷材料的至少一个板，所述透明振动器设置成由压电陶瓷材料板振动，所述透明振动器 压电陶瓷材料是陶瓷材料，其由以下公式表示：Pb1-xLax（ZryTiz）1-x / 403，其中x和y / z设置在由相位图中连续耦合点abcdea的线所包围的区域内。 其中在横坐标轴上取PbZrO3和PbTiO3之间的比率（y / z），而在纵坐标轴处取La浓度（x）（其中x = 8.4和y / z 在a，x = 6和y / z = 55.5 / 44.5在b，x = 6和y / z = 50/50在c，x = 12和y / z = 50/50在d时= 65/35， 在e）x = 9，y / z = 65/35。 透明传感器在透明度和电声响应方面都非常出色。
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公开(公告)号：US4352961A
公开(公告)日：1982-10-05
申请号：US155228
申请日：1980-06-02
申请人： Akio Kumada , Shigeo Nakamura
发明人： Akio Kumada , Shigeo Nakamura
摘要： This invention intends to provide a speaker which assumes a comparatively large area in a device without spoiling various display effects. The transparent flat panel speaker of this invention is a speaker of high efficiency which can give forth a sound volume large considering the small-sized device even when driven by a low voltage.The transparent flat panel speaker of this invention comprises, at least, a transparent resonator plate and a plate of a piezoelectric material held between at least one pair of electrodes, the resonator being excited by the piezoelectric material plate, a periphery of the resonator plate having a shape which is represented by a curve or in which straight lines are connected by smooth curves with at least two centers of curvature.As the peripheral shapes, an ellipse, a curve expressed by X.sup.n /a+Y.sup.n /b=1, a plane figure obtained by molding the corners of a polygon circumscribed or inscribed to an ellipse, etc. are especially favorable for the speaker.
摘要翻译： 本发明旨在提供一种扬声器，其在设备中呈现相当大的面积而不破坏各种显示效果。 本发明的透明平板扬声器是高效率的扬声器，即使在由低电压驱动的情况下，也能够考虑到小型装置而产生较大的音量。 本发明的透明平板扬声器至少包括保持在至少一对电极之间的透明谐振器板和压电材料板，谐振器由压电材料板激励，谐振器板的周边具有 由曲线表示的形状或通过具有至少两个曲率中心的平滑曲线连接直线的形状。 作为外围形状，椭圆，由Xn / a + Yn / b = 1表示的曲线，通过模制被外接或内接于椭圆的多边形的角所获得的平面图等对扬声器是特别有利的。
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公开(公告)号：US4071841A
公开(公告)日：1978-01-31
申请号：US624338
申请日：1975-10-21
申请人： Akio Kumada
发明人： Akio Kumada
IPC分类号： G09G3/36 , G02F1/055 , G02F1/133 , G02F1/1333 , G02F1/1343 , G02F1/135 , G09F9/30 , H01L27/20 , H04N5/66 , G11C11/22 , G11C11/42
CPC分类号： H01L27/20
摘要： For dielectric matrix devices, plural stripe-shaped vertical and horizontal electrodes are crossed with each other respectively and disposed on the front surface of a predetermined dielectric plate, while on the back surface of said dielectric substrate independent electrodes are disposed on both the corresponding portions to the crossed areas of horizontal and vertical electrodes and the neighboring portions to these areas.The present dielectric matrix element is characterized in that the lead wire to the horizontal and vertical electrodes disposed on the dielectric substrate is connected to only one side of this dielectric substrate.
摘要翻译： 对于介质矩阵装置，多个条状垂直和水平电极分别交叉并且设置在预定电介质板的前表面上，而在所述电介质基板的背面上，独立电极设置在相应的部分 水平和垂直电极的交叉区域以及这些区域的相邻部分。
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公开(公告)号：US3953109A
公开(公告)日：1976-04-27
申请号：US449078
申请日：1974-03-07
申请人： Akio Kumada
发明人： Akio Kumada
摘要： In an irregular ferroelectric crystal plate having a domain switching element, the domain is made to grow unilaterally in a desired direction only, so that the domain wall is made movable in a desired direction only. The invention pertains also to a method of operating such element and to a method of making the same.
摘要翻译： 在具有畴切换元件的不规则铁电晶体板中，使该畴仅沿所需方向单侧生长，使得畴壁仅在所需方向上可移动。 本发明还涉及一种操作这种元件的方法及其制造方法。
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公开(公告)号：US5008581A
公开(公告)日：1991-04-16
申请号：US335374
申请日：1989-04-10
申请人： Akio Kumada , Takahiko Iochi , Minoru Okada
发明人： Akio Kumada , Takahiko Iochi , Minoru Okada
摘要： A piezoelectric revolving resonator is disclosed in which a piezoelectric ceramic material in the form of a disk, a cylinder or a pipe is polarized so that two regions divided by its diameter are different in polarity from each other, and electrodes are provided to form equipotential surfaces on opposite principal surfaces and a resonant condition in which piezoelectric deformations are revolved is excited by a single-phase alternating current voltage. Due to the single-phase drive, the structures of the resonator and the drive circuit can be simplified.
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