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公开(公告)号：US4333708A
公开(公告)日：1982-06-08
申请号：US98976
申请日：1979-11-30
申请人： Gary D. Boyd , Julian Cheng , Peter D. T. Ngo
发明人： Gary D. Boyd , Julian Cheng , Peter D. T. Ngo
CPC分类号： G02F1/1391 , G02F1/1337
摘要： A liquid crystal cell having memory is provided by disposing a liquid crystal material having nematic directors between two substrates which are fabricated to contain an array of singular points. The cell may further include means for detaching singularities such as appropriate electrode arrangements.These substrate configurations provide multistable configurations of the director alignments because disclinations must be moved, either through the bulk of the liquid crystal material or on the substrate surfaces to switch between the stable configurations.The switching of the device between stable configurations may be accomplished by the application of electrical fields to the liquid crystal material.The stable configurations may be optically differentiated by the incorporation of pleochroic dyes into the liquid crystal material or by crossed polarizers.
摘要翻译： 具有存储器的液晶单元通过在两个基板之间设置具有向列导向器的液晶材料来制造，该两个基板被制造成包含奇异点阵列。 电池还可以包括用于分离诸如适当电极布置的奇点的装置。 这些衬底配置提供导向器对准的多态配置，因为必须通过大部分液晶材料或衬底表面上移动，以便在稳定构型之间切换。 在稳定配置之间的器件的切换可以通过将电场施加到液晶材料来实现。 通过将多色染料掺入到液晶材料中或通过交叉的偏振器可以光稳定地构成。
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公开(公告)号：US4717243A
公开(公告)日：1988-01-05
申请号：US843855
申请日：1986-03-21
申请人： Gary D. Boyd , Julian Cheng
发明人： Gary D. Boyd , Julian Cheng
CPC分类号： G09G3/3629 , G02F1/13306 , G02F1/1391 , G09G2300/0486
摘要： Threshold electric fields required to achieve high speed matrix addressing of selected cells in a bistable nematic liquid crystal storage display are reduced by employing a short duration, priming pulse signal in accordance with the principles of the invention. The short priming pulse signal applied to a selected cell modifies the binding energy for disclinations attached to sites of orientational discontinuity, thereby changing the threshold field required for electrical switching between bistable states. Threshold reduction also depends on the AC frequency and duration of a writing pulse signal applied to the selected cell subsequent to the priming pulse signal.
摘要翻译： 通过采用根据本发明的原理的短持续时间的起动脉冲信号，可以降低实现双稳态向列型液晶存储显示器中选定单元的高速矩阵寻址所需的阈值电场。 施加到所选择的单元的短启动脉冲信号修改与取向不连续部位相连的分离的结合能，由此改变双稳态之间的电切换所需的阈值场。 阈值减小还取决于在启动脉冲信号之后施加到所选择的单元的写入脉冲信号的AC频率和持续时间。
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公开(公告)号：US4601543A
公开(公告)日：1986-07-22
申请号：US788108
申请日：1985-10-17
CPC分类号： G02F1/1391 , G02F1/13768 , G02F1/132
摘要： A bistable nematic liquid crystal display cell is switched between topologically equivalent, asymmetric horizontal states. Switching is initiated by application of a directional, symmetry breaking field such as a transverse magnetic field. An electric potential is then applied across the cell to complete the switching cycle and maintain the state. The cell includes upper and lower parallel substrates, upper and lower topographically textured tilt alignment surfaces on the corresponding substrates, and nematic liquid crystal material between the substrates. In an active region of the cell, the tilt alignment surfaces form an equal reverse tilt boundary condition. In an isolation region surrounding the active region of the cell, the tilt alignment surfaces form a parallel tilt boundary condition.
摘要翻译： 双稳向列型液晶显示单元在拓扑等效的非对称水平状态之间切换。 通过施加诸如横向磁场的定向对称断裂场来开始切换。 然后将电势施加在电池单元上以完成开关周期并保持该状态。 电池包括上和下平行衬底，相应衬底上的上，下地形纹理的倾斜对准表面以及衬底之间的向列型液晶材料。 在电池的有源区域中，倾斜对准表面形成相等的反向倾斜边界条件。 在围绕电池的有源区域的隔离区域中，倾斜对准表面形成平行的倾斜边界条件。
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公开(公告)号：US4472026A
公开(公告)日：1984-09-18
申请号：US375670
申请日：1982-05-06
申请人： Gary D. Boyd , Julian Cheng
发明人： Gary D. Boyd , Julian Cheng
CPC分类号： G02F1/132 , G02F1/1391
摘要： A row and column matrix of strip electrodes is utilized for switching bistable liquid crystal display cells from the vertical state to the horizontal state via resistive heating by applying an electric current of sufficient magnitude and duration to selected electrodes. Resistive heating causes the liquid crystal to undergo a phase transition from the nematic mesophase to an isotropic phase. Extinction of the current permits the liquid crystal to cool preferentially into the horizontal state of the nematic mesophase. Horizontal-to-vertical state switching is performed by conventional electric field effect techniques.
摘要翻译： 利用带状电极的行和列矩阵，通过对所选择的电极施加足够大的持续时间的电流，通过电阻加热将双稳态液晶显示单元从垂直状态切换到水平状态。 电阻加热导致液晶从向列型中间相转变为各向同性相。 电流的消光允许液晶优先冷却到向列型中间相的水平状态。 通过常规电场效应技术进行水平垂直状态切换。
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公开(公告)号：US06642070B2
公开(公告)日：2003-11-04
申请号：US10280521
申请日：2002-10-25
申请人： Wenbin Jiang , Julian Cheng , Chan-Long Shieh , Hsing-Chung Lee
发明人： Wenbin Jiang , Julian Cheng , Chan-Long Shieh , Hsing-Chung Lee
IPC分类号： H01L2120
CPC分类号： B82Y20/00 , H01L21/02395 , H01L21/02433 , H01L21/02458 , H01L21/02461 , H01L21/02463 , H01L21/02507 , H01L21/02546 , H01L21/0262 , H01S5/18313 , H01S5/32366 , H01S5/34306 , H01S5/34346 , H01S2304/02 , H01S2304/04
摘要： A method of fabricating a vertical cavity surface emitting laser comprising the steps of epitaxially growing a first DBR positioned on a substrate wherein the first DBR is epitaxially grown using MOCVD. The substrate is orientated in an off-axis crystallographic direction which increases the radiative efficiency. A first cladding layer is positioned on the first DBR and an active region is epitaxially grown on the first cladding layer wherein the active region is epitaxially grown using plasma assisted MBE. A second DBR is epitaxially grown on the second cladding layer wherein the second DBR is epitaxially grown using MOCVD. The active region is epitaxially grown using plasma assisted MBE to increase the mole fraction of nitrogen (N) incorporation. The DBR's are grown using MOCVD to improve the electrical performance.
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公开(公告)号：US5666376A
公开(公告)日：1997-09-09
申请号：US647186
申请日：1996-05-09
申请人： Julian Cheng
发明人： Julian Cheng
CPC分类号： H03K19/21 , G06E1/04 , H01L31/153 , H01S5/0261 , H03K19/14 , H01S5/0262 , H01S5/042 , H01S5/18308 , H01S5/2063
摘要： An electro-optical device includes a vertical cavity surface emitting laser, a heterojunction light emitting device and heterojunction phototransistor on a semiconductor substrate. Layers of the heterojuncticn phototransistor and the heterojunction light-emitting device are electrically and optically coupled so there is regenerative optical and electrical feedback between them. Layers of the heterojunction light-emitting devices are proton implanted to control the feedback. Plural such devices are electrically and optically coupled together to perform logic functions, such as EXCLUSIVE OR, in response to optical signals.
摘要翻译： 电光装置包括垂直腔表面发射激光器，异质结发光器件和半导体衬底上的异质结光电晶体管。 异质结光电晶体管和异质结发光器件的层被电学和光学耦合，从而在它们之间存在再生光学和电反馈。 异质结发光器件的层被质子注入以控制反馈。 多个这样的设备电和光耦合在一起以执行响应于光信号的逻辑功能，例如EXCLUSIVE OR。
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公开(公告)号：US4745446A
公开(公告)日：1988-05-17
申请号：US61006
申请日：1987-06-10
申请人： Julian Cheng , Stephen R. Forrest
发明人： Julian Cheng , Stephen R. Forrest
IPC分类号： H01L27/06 , H01L27/144 , H01L29/80
CPC分类号： H01L27/1443 , H01L27/0605
摘要： Various integrated device structures are described which incorporate novel substrate materials and channel confinement schemes. For example, devices are described for p-type substrates and novel buffer layers. Such substrates are easier to grow and provide good isolation and low-trap density at the interface between substrate and buffer layer.
摘要翻译： 描述了结合新颖的基板材料和通道限制方案的各种集成器件结构。 例如，描述了用于p型衬底和新型缓冲层的器件。 这样的基底更容易生长，并且在衬底和缓冲层之间的界面处提供良好的隔离和低陷阱密度。
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公开(公告)号：US5572540A
公开(公告)日：1996-11-05
申请号：US925437
申请日：1992-08-11
申请人： Julian Cheng
发明人： Julian Cheng
CPC分类号： H01S5/0262 , H01S5/0261 , H01S5/0608 , H01S5/183 , H01S5/423
摘要： The present invention pertains to electronically controlled optical switching and interconnection arrangements enabling generation and processing of optical pulses including rerouting, serializing, modulation, and other processing or transformation of such pulses.
摘要翻译： 本发明涉及能够生成和处理光脉冲的电子控制光学开关和互连布置，包括重新路由，串行化，调制和其他处理或转换这样的脉冲。
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公开(公告)号：US4771325A
公开(公告)日：1988-09-13
申请号：US700441
申请日：1985-02-11
IPC分类号： H01L27/14 , H01L27/144 , H01L27/146 , H01L31/10 , H01L31/105 , H01L33/00
CPC分类号： H01L31/105 , H01L27/1443
摘要： An integrated photodetector-amplifier is described which is planar and exhibits excellent circuit characteristics including low input capacitance, high speed, and high sensitivity. Also, certain self-alignment features and a planar technology made fabrication of the circuits simpler and easier than most such circuits.
摘要翻译： 描述了一种平面的集成光电检测器 - 放大器，并且具有包括低输入电容，高速度和高灵敏度的优异的电路特性。 此外，某些自对准特征和平面技术使得电路的制造比大多数这样的电路更简单和容易。
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公开(公告)号：US4400060A
公开(公告)日：1983-08-23
申请号：US252148
申请日：1981-04-08
申请人： Julian Cheng
发明人： Julian Cheng
CPC分类号： G02F1/13725 , G02F1/1337 , G02F1/133753 , G02F1/1391 , G02F2001/133738 , G02F2001/133742 , G02F2001/133761
摘要： In order to prevent drift between the two stable states in the bulk of the liquid crystal material, a specific cell isolation region formed from the same liquid crystal material is required. This cell isolation is provided in one embodiment by a uniformly tilted liquid crystal alignment. The surface of the substrates between which the liquid crystal material is disposed is treated to provide the uniform tilt in regions which surround the bistable volumes of liquid crystal material.
摘要翻译： 为了防止在大部分液晶材料中的两种稳定状态之间的漂移，需要由相同的液晶材料形成的特定的电池隔离区域。 在一个实施例中通过均匀倾斜的液晶对准来提供该电池隔离。 处理配置有液晶材料的基板的表面，以在围绕液晶材料的双稳态体积的区域中提供均匀的倾斜。
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