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    • 2. 发明授权
    • Combination full-duplex and half-duplex electronic identification tag
    • 组合全双工和半双工电子识别标签
    • US08581705B2
    • 2013-11-12
    • US12554743
    • 2009-09-04
    • Robert Stewart
    • Robert Stewart
    • G06K7/01
    • G06K19/0723G06K19/0709G06K19/0712G06K19/0726
    • Transponders are disclosed that are configurable to operate in an HDX mode and/or an FDX-B mode and that use a switchable load impedance across the transponders' resonant antenna circuit to induce amplitude and/or frequency modulation. An RF level detection circuit determines when the instantaneous activation signal strength is sufficient to support monoplex, multiplex, and diplex operation. A non-volatile memory stores identification data coded in HDX and FDX-B formats. One embodiment of the invention includes an inductive antenna including two terminals connected to tag circuitry, where the inductive antenna forms a resonant antenna circuit tuned to resonate at the frequency of the activation signal. In addition, the tag circuitry includes a non-volatile memory, the tag circuitry and the resonant antenna circuitry are configurable as an oscillator, the tag circuitry is configured to be powered by electric current induced in the resonant antenna circuit by the activation signal, the tag circuitry includes at least one switchable load impedance connected across the antenna resonant circuit, the tag circuitry is configurable to amplitude modulate the activation signal appearing at the resonant antenna circuit terminals using a switchable load impedance, and the tag circuitry is configurable to frequency shift key modulate the oscillator signal appearing at the resonant antenna circuit terminals using a switchable load impedance.
    • 公开了可配置为以HDX模式和/或FDX-B模式操作并且在转发器的谐振天线电路之间使用可切换负载阻抗以引起幅度和/或频率调制的转发器。 RF电平检测电路确定瞬时激活信号强度何时足以支持单重复用,多路复用和双工操作。 非易失性存储器存储以HDX和FDX-B格式编码的标识数据。 本发明的一个实施例包括感应天线,其包括连接到标签电路的两个终端,其中感应天线形成调谐为以激活信号的频率谐振的谐振天线电路。 此外,标签电路包括非易失性存储器,标签电路和谐振天线电路可配置为振荡器,标签电路被配置为由激励信号在谐振天线电路中感应的电流供电, 标签电路包括连接在天线谐振电路两端的至少一个可切换负载阻抗,标签电路可配置为使用可切换负载阻抗来振幅调制出现在谐振天线电路端子处的激活信号,并且标签电路可配置为频移键 使用可切换的负载阻抗来调制出现在谐振天线电路端子处的振荡器信号。
    • 3. 发明申请
    • Universal vehicle head display (HUD) device and method for using the same
    • 通用车头显示(HUD)装置及其使用方法
    • US20070019297A1
    • 2007-01-25
    • US11187833
    • 2005-07-25
    • Robert StewartMichael SmithSteven Stringfellow
    • Robert StewartMichael SmithSteven Stringfellow
    • G02B27/14
    • G02B27/0101G02B27/0149G02B2027/0156
    • The invention generally relates to an integrated head up displaying (HUD) device including a housing that houses an active-matrix image projecting system and its accompanying electronics, and an optical combiner (for providing a see-through image thereon) connected to the housing via a retractable arm attached at one end to the main body and holds the HUD optical panel at its other end. In particular, the telescopically retractable arm allows the assembly to extend or retract for a desirable combiner height. Further, the LED backlighting array is placed within a reflective light chamber which is lined with a safe, light-weight, low cost, specular, reflective sheet for high reflectivity. The non-conductive, reflective sheet also covers the LED printed circuit board.
    • 本发明一般涉及一种集成的抬头显示装置(HUD)装置,其包括容纳有源矩阵图像投影系统及其伴随的电子装置的壳体,以及连接到壳体的光学组合器(用于提供其上的透视图像) 可伸缩臂在一端附接到主体并将HUD光学面板保持在其另一端。 特别地,可伸缩的臂允许组件伸出或缩回以达到期望的组合器高度。 此外,LED背光阵列放置在反射光室内,该反射光室内衬有安全,重量轻,成本低,镜面反射片材,用于高反射率。 非导电反射片也覆盖了LED印刷电路板。
    • 4. 发明申请
    • Synchronization and adaptive timing method for multiple RFID reader system
    • 多个RFID阅读器系统的同步和自适应定时方法
    • US20060279406A1
    • 2006-12-14
    • US11449455
    • 2006-06-07
    • Robert StewartIng. Gunther Neger
    • Robert StewartIng. Gunther Neger
    • H04Q5/22
    • G06K7/0008G06K7/10356
    • In a system comprising multiple electronic (radio frequency) identification interrogator devices, which are used to activate and to receive identification code information from one or more passive transponder devices, activation signals are synchronized and adaptively timed by a master interrogator. The master interrogator generates a synchronization signal containing frequency, phase, and cadence information, and uses this synchronization signal to generate its own activation signal. The master interrogator also conveys this synchronization signal to slave interrogators, where it is used to generate each slave's activation signal. Each slave interrogator conveys to the master interrogator its transponder detection status information, and the master interrogator modifies the synchronization signal's cadence in compliance with timing requirements of ISO Standard 11785. A universal interrogator architecture is employed, whereby each interrogator is configured by software to be either the master interrogator or a slave interrogator. Fail-safe operation of the system is possible by virtue of a slave interrogator's ability to reconfigure itself as the master interrogator in the event of loss of the primary master interrogator's synchronization signal.
    • 在包括多个电子(射频)识别询问器装置的系统中,用于激活和接收来自一个或多个无源应答器装置的识别码信息,激活信号由主询问器同步并自适应地定时。 主询问器产生包含频率,相位和节奏信息的同步信号,并且使用该同步信号来产生其自身的激活信号。 主询问器还将该同步信号传送给从属询问器,用于产生每个从机的激活信号。 每个从站询问器向主询问器传送其应答器检测状态信息,并且主询问器根据ISO标准11785的定时要求修改同步信号的节奏。采用通用询问器架构,每个询问器由软件配置为 主询问器或从属询问器。 在主要的主要询问器的同步信号丢失的情况下,凭借从属询问器自身重新配置为主询问器的能力,系统的故障安全操作是可能的。