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    • 3. 发明授权
    • Multi-track ferroelectric device
    • 多轨铁电装置
    • US4360894A
    • 1982-11-23
    • US208835
    • 1980-11-20
    • John M. Geary
    • John M. Geary
    • G11C11/22
    • G11C11/22
    • Domain wall motion in a slab of ferroelectric material gives rise to an electrical signal which may correspond, e.g., to electrode width fluctuations or to a radiation pattern incident on a sensitive layer. A device may have numerous ferroelectric readout tracks, in which case the number of electrical leads can be minimized by a layout in which unidirectional movement of a planar ferroelectric domain wall not only serves to scan a track but also select a track from a large number of tracks. Such device operation is a feature of a device in which a ferroelectric slab is cut, e.g., in the manner of a comb or ladder. Resulting devices may be operated by judicious cycling of voltages at as few as two control electrodes, one defining an access track, and the other being common to the readout tracks.
    • 在铁电材料板中的畴壁运动产生电信号,其可对应于例如电极宽度波动或入射到敏感层上的辐射图。 器件可以具有许多铁电读出轨道,在这种情况下,电引线的数量可以通过其中平面铁电畴壁的单向运动不仅用于扫描轨道而且从大量的 轨道 这种装置操作是其中铁电板被切割的装置的特征,例如以梳子或梯子的方式被切割。 所产生的装置可以通过在少至两个控制电极(一个限定存取轨道)和另一个与读出轨道相同的电压的合理循环来操作。
    • 5. 发明授权
    • Ferroelectric liquid crystal devices using field-stabilized states
    • 铁电液晶器件采用场稳态
    • US4707078A
    • 1987-11-17
    • US727690
    • 1985-04-26
    • John M. Geary
    • John M. Geary
    • G02F1/133G02F1/137G02F1/141G09G3/18
    • G02F1/141
    • In a display device utilizing ferroelectric (e.g., chiral, smectic C material), a stabilizing electric field perpendicular to the cell surfaces forces the molecules to orient themselves in one of two states both of which are parallel to the cell surfaces. A particular state is selected by a switching electric field also oriented perpendicular to the cell surfaces. The stabilizing field has a half-cycle time shorter than the switching time of the ferroelectric material, whereas the switching field duration is longer than or equal to the switching time of the material. The invention enables the use of relatively thick (e.g., .gtoreq.2 .mu.m) ferroelectric cells.
    • 在利用铁电(例如手性,近晶C材料)的显示装置中,垂直于电池表面的稳定电场迫使分子将其自身定向成两个状态之一,两者均与电池表面平行。 通过也垂直于电池表面定向的开关电场选择特定状态。 稳定电场具有比铁电材料的开关时间短的半周期时间,而开关场持续时间大于或等于材料的切换时间。 本发明能够使用相对厚的(例如>2μm)铁电单元。
    • 8. 发明授权
    • Ferroelectric digital device
    • 铁电数字设备
    • US4262339A
    • 1981-04-14
    • US27611
    • 1979-04-05
    • John M. Geary
    • John M. Geary
    • G11C11/22G11C19/18G11C19/28
    • G11C11/22G11C19/184G11C19/28
    • Digital devices such as, e.g., shift registers and logical gates are disclosed which are predicated on domain wall motion in a film of a ferroelectric material, such as, e.g., gadolinium molybdate or lead germanate. Disclosed devices comprise electrodes on both sides of the film of ferroelectric material and may further comprise a resistive layer whose presence facilitates domain wall motion past inter-electrode gaps. Electrodes or facing portions of electrodes define regions in the film and, in particular, an input region and an output region.To facilitate series connection of devices, electrodes are designed so as to cause energy gain during device operation. According to such design, surface area of an output region is larger than surface area of an input region. A current sensor is electrically connected to an electrode defining such output region.
    • 公开了诸如移位寄存器和逻辑门的数字装置,其基于铁电材料的膜中的畴壁运动,例如钼酸钆或锗酸铅。 公开的装置包括在铁电材料膜的两侧的电极,并且还可以包括电阻层,其存在促进畴壁运动经过电极间间隙。 电极或电极的面对部分限定膜中的区域,特别是输入区域和输出区域。 为了便于设备的串联,电极被设计成在器件操作期间引起能量增益。 根据这样的设计,输出区域的表面积大于输入区域的表面积。 电流传感器电连接到限定这种输出区域的电极。