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    • 1. 发明授权
    • Packaged micromirror assembly with in-package mirror position feedback
    • 封装微镜组件,带有封装内反射镜位置反馈
    • US06714336B2
    • 2004-03-30
    • US09957476
    • 2001-09-20
    • John W. OrcuttRobert C. KellerJose L. MelendezDwight Bartholomew
    • John W. OrcuttRobert C. KellerJose L. MelendezDwight Bartholomew
    • G02B2600
    • G02B6/359G02B6/3512G02B6/3572G02B6/3582G02B26/0833G02B26/085H04B10/1123H04B10/1125
    • A packaged micromirror assembly (21, 21′) is disclosed. The assembly (21, 21′) includes a mirror element (41) having a mirror surface (29) that can rotate in two axes. Magnets (53) are attached to the mirror element (41), to permit rotation of the mirror surface (29) responsive to the energizing of coil drivers (36). A sensor (63, 80) is disposed under the mirror surface (29) to detect mirror orientation. In one aspect of the invention, the sensor (63) includes a light source such as an LED (68) that imparts light through an aperture (66) at the underside of the mirror surface (29). Light detectors (65) are arranged at varying angles, and detect relative intensity of light reflected from the underside of the mirror surface (29), from which the rotational position of the mirror (29) can be derived. According to another aspect of the invention, a conical sensor (80) with multiple insulated segmented capacitor plates are arranged under the mirror surface (29). Variations in the capacitance between the mirror (29) and the various segments of the sensor (80) indicate the position of the mirror (29). A calibration memory (77) may be provided, to store calibration values so that the sensor (63, 80) can be nulled with the mirror (29).
    • 公开了一种封装的微镜组件(21,21')。 组件(21,21')包括具有可以在两个轴线上旋转的镜面(29)的镜子元件(41)。 磁体(53)附接到镜子元件(41),以允许响应于线圈驱动器(36)的激励来旋转镜面(29)。 传感器(63,80)设置在镜面(29)的下方以检测镜面取向。 在本发明的一个方面,传感器(63)包括诸如LED(68)的光源,其通过镜面(29)的下侧处的孔(66)发光。 光检测器(65)以不同的角度布置,并且检测从镜面(29)的下侧反射的光的相对强度,可以从其导出反射镜(29)的旋转位置。 根据本发明的另一方面,具有多个绝缘分段电容器板的锥形传感器(80)布置在镜面(29)的下方。 反射镜(29)和传感器(80)的各个部分之间的电容的变化表示反射镜(29)的位置。 可以提供校准存储器(77)以存储校准值,使得传感器(63,80)可以被反射镜(29)置零。
    • 4. 发明授权
    • System for acquiring and maintaining reliable optical wireless links
    • 用于获取和维护可靠的光无线链路的系统
    • US06813446B1
    • 2004-11-02
    • US10124997
    • 2002-04-18
    • Jose L. MelendezRobert C. Keller
    • Jose L. MelendezRobert C. Keller
    • H04B1000
    • H04B10/1127
    • Disclosed is apparatus and method for establishing and maintaining optical data transfer between a first optical communications device (202) and a second optical communications device (204). The devices have a feedback communications link (216) therebetween. An optical signal (214), having a predetermined signal profile (306), is transmitted from a transmission source (104) within the first optical communications device to an optical receiver (112) within the second optical communications device. The predetermined signal profile is transmitted from the first device, via the feedback communications link, to the second device. The signal profile (408) of the optical signal as received by the optical receiver is determined, and compared with the predetermined signal profile to quantify any misalignment or movement of the optical signal with respect to the optical receiver. The transmission of the optical signal is then adjusted by a directing member (106) responsive to the results of the compared profiles to align and center the optical signal with respect to the optical receiver. Once properly align, the optical signal may be utilized for high speed, high bandwidth data transmission.
    • 5. 发明授权
    • Cooperating array of micromirror devices for wireless optical communication
    • 用于无线光通信的微镜器件的协同阵列
    • US07149427B1
    • 2006-12-12
    • US10024321
    • 2001-12-14
    • Andrew S. DewaRobert C. Keller
    • Andrew S. DewaRobert C. Keller
    • H04J14/00
    • G02B26/085G02B26/101
    • A micromirror array assembly (10, 20) for use in optical modules (5, 17) in a wireless network system is disclosed. The micromirror array assembly (10, 20) includes a plurality of mirrors (29) monolithically formed with a frame (43), attached by way of hinges (55) and gimbal portions (45). Permanent magnets (53) are attached to each of the gimbal portions (45) associated with the mirrors (29). The resulting frame (43) is then mounted to a coil driver assembly (50) so that coil drivers (34) can control the rotation of each mirror (29), under separate control from control circuitry (14, 24). The micromirror array assembly (10, 20) is thus able to support higher signal energy at larger spot sizes, and also enables multiplexed transmission and receipt, as well as sampling of the received beam for quality sensing. A method of manufacturing the micromirror array assembly (10, 20) is also disclosed, in which a support wafer (60) is temporarily bonded to the mirror wafer (70) while the permanent magnets (53) are attached.
    • 公开了一种用于无线网络系统中的光学模块(5,17)中的微镜阵列组件(10,20)。 微镜阵列组件(10,20)包括多个通过铰链(55)和万向节(45)连接的框架(43)整体形成的反射镜(29)。 永磁体(53)附接到与反射镜(29)相关联的每个万向节部分(45)。 所得到的框架(43)然后被安装到线圈驱动器组件(50),使得在与控制电路(14,24)分开的控制下,线圈驱动器(34)可以控制每个反射镜(29)的旋转。 因此,微镜阵列组件(10,20)能够以更大的光斑尺寸支持更高的信号能量,并且还能够进行复用的传输和接收,以及用于质量感测的接收光束的采样。 还公开了一种制造微镜阵列组件(10,20)的方法,其中在安装永磁体(53)的同时,支撑晶片(60)暂时地接合到反射镜晶片(70)。
    • 6. 发明授权
    • Butyl rubber compositions having improved adhesion to polyester
    • 丁基橡胶组合物具有改善的与聚酯的粘合性
    • US5021509A
    • 1991-06-04
    • US403306
    • 1989-09-01
    • Robert C. KellerMarc R. Kuhnhein
    • Robert C. KellerMarc R. Kuhnhein
    • B32B25/10B32B25/04B32B25/18C08J5/12C08L9/00C08L21/00C08L23/00C08L23/08C08L23/22C08L23/26C08L23/28D06M15/693
    • C08L23/22
    • The present invention provides for an improved butyl rubber composition which exhibits improved adhesion to pre-treated polyester textile materials, while at the same time important physical properties of cured butyl rubber such as modulus, tensile strength and elongation are maintained or even enhanced. The vulcanizable composition of the invention is based on a blend of butyl rubber and minor amounts of a copolymer of ethylene with a lower alkyl acrylate or methacrylate, or a terpolymer of ethylene, a lower alkyl acrylate or methacrylate and acrylic or methacrylic acid. The composition of this invention exhibits improved adhesion to pre-treated polyester textile materials.The invention also relates to laminates of the butyl rubber compositions of this invention with polyester textile materials such as yarns and woven fabrics.
    • 本发明提供了改进的丁基橡胶组合物,其对预处理的聚酯纺织材料具有改善的粘合性,同时保持或者甚至增强了模量,拉伸强度和伸长率等固化的丁基橡胶的重要物理性能。 本发明的可硫化组合物是基于丁基橡胶和少量乙烯与丙烯酸低级烷基酯或甲基丙烯酸酯的共聚物或乙烯,丙烯酸或丙烯酸低级烷基酯或丙烯酸或甲基丙烯酸的三元共聚物的混合物。 本发明的组合物表现出对预处理的聚酯纺织材料的改善的粘合性。 本发明还涉及本发明的丁基橡胶组合物与聚酯纺织材料如纱线和机织织物的层压体。
    • 7. 发明授权
    • Versioned database cache
    • 版本化的数据库缓存
    • US08782023B1
    • 2014-07-15
    • US13359278
    • 2012-01-26
    • Monica ChawatheNamit SikkaAshish GuptaRobert C. KellerFenglin LiaoHaifeng Jiang
    • Monica ChawatheNamit SikkaAshish GuptaRobert C. KellerFenglin LiaoHaifeng Jiang
    • G06F17/30
    • G06F17/30309
    • A device may store information associated with a group of items in a database. The information associated with a particular item may include a group of versions of a particular attribute. A particular version of the particular attribute may include a value associated with the particular attribute and a timestamp. The device may receive a query that specifies a time; determine that the query is associated with the particular item; and determine, based on the specified time, which version of the particular attribute is associated with the query. The device may determine which version of the particular attribute is associated with the query by identifying, based on the timestamps associated with the versions of the particular attribute, a version of the particular attribute that is a newest version, of the versions of the particular attribute that are associated with timestamps that are before or concurrent with the specified time.
    • 设备可以将与一组项目相关联的信息存储在数据库中。 与特定项目相关联的信息可以包括特定属性的一组版本。 特定属性的特定版本可以包括与特定属性和时间戳相关联的值。 设备可能会收到指定时间的查询; 确定查询与特定项目相关联; 并且基于指定的时间确定特定属性的哪个版本与查询相关联。 设备可以通过基于与特定属性的版本相关联的时间戳来识别特定属性的特定属性的版本,特定属性的版本的特定属性的版本,来确定特定属性的哪个版本与查询相关联 它们与指定时间之前或之后的时间戳相关联。
    • 10. 发明授权
    • Hardware warning protocol for processing units
    • 处理单元的硬件警告协议
    • US08127181B1
    • 2012-02-28
    • US11934732
    • 2007-11-02
    • Michael C. ShebanowJohn S. MontrymRichard A. SilkebakkenRobert C. Keller
    • Michael C. ShebanowJohn S. MontrymRichard A. SilkebakkenRobert C. Keller
    • G06F11/00G06F11/36
    • G06F11/3648G06F11/3636G06F11/366
    • Processing units are configured to capture the unit state in unit level error status registers when a runtime error event is detected in order to facilitate debugging of runtime errors. The reporting of warnings may be disabled or enabled to selectively monitor each processing unit. Warnings for each processing unit are propagated to an exception register in a front end monitoring unit. The warnings are then aggregated and propagated to an interrupt register in a front end monitoring unit in order to selectively generate an interrupt and facilitate debugging. A debugging application may be used to query the interrupt, exception, and unit level error status registers to determine the cause of the error. A default error handling behavior that overrides error conditions may be used in conjunction with the hardware warning protocol to allow the processing units to continue operating and facilitate in the debug of runtime errors.
    • 处理单元配置为在检测到运行时错误事件时捕获单元级错误状态寄存器中的单元状态,以便于调试运行时错误。 可以禁用或启用警告报告,以选择性地监视每个处理单元。 每个处理单元的警告传播到前端监视单元中的异常寄存器。 然后将警告聚合并传播到前端监视单元中的中断寄存器,以便选择性地产生中断并便于调试。 调试应用程序可用于查询中断,异常和单元级错误状态寄存器,以确定错误的原因。 超出错误条件的默认错误处理行为可能与硬件警告协议一起使用,以允许处理单元继续运行,并有助于调试运行时错误。