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    • 33. 发明授权
    • Startup circuit for DC-DC converter
    • DC-DC转换器启动电路
    • US08476878B2
    • 2013-07-02
    • US12946158
    • 2010-11-15
    • Siew K. HoonMengzhe Ma
    • Siew K. HoonMengzhe Ma
    • G05F1/59
    • H02M1/36
    • A startup circuit for use in a DC-DC converter having an input voltage terminal and an output voltage terminal, with the output voltage terminal connected to an output capacitor and with said converter including a pass transistor for transferring charge from the input terminal to the output terminal. The startup circuit includes a control circuit configured to cause the pass transistor to conduct an output current during start up when the output terminal voltage is approaching a final regulated voltage, with the output current being comprised of first and second current components, with the first current component being proportional to the output voltage and the second current component being proportional to the input voltage, with the two components being combined so as to resist changes in the power dissipation in the pass transistor during startup.
    • 一种用于具有输入电压端子和输出电压端子的DC-DC转换器的启动电路,其输出电压端子连接到输出电容器,并且所述转换器包括用于将电荷从输入端子传输到输出端的传输晶体管 终奌站。 启动电路包括控制电路,其被配置为当输出端电压接近最终调节电压时使得通过晶体管在启动期间传导输出电流,其中输出电流由第一和第二电流分量组成,其中第一电流 分量与输出电压成比例,并且第二电流分量与输入电压成比例,其中两个分量被组合以便抵抗启动期间传输晶体管中功率耗散的变化。
    • 36. 发明申请
    • LED DRIVER HAVING NON-LINEAR COMPENSATION
    • 具有非线性补偿的LED驱动器
    • US20130088171A1
    • 2013-04-11
    • US13267156
    • 2011-10-06
    • David James Fensore
    • David James Fensore
    • H05B37/02
    • H05B33/0818H05B33/0827Y02B20/347
    • A device driver which includes an input driver configured to produce a sequence of uncompensated drive signals along with compensation circuitry connected to receive the uncompensated drive signals and to produce corresponding compensated drive signals. The compensation circuitry is capable of storing two or less control points that define a single compensation curve such as a Bezier curve, with the compensation circuitry converting the uncompensated drive signals to the corresponding compensated drive signals utilizing the control points. An output driver is configured to drive a device such as one or more light emitting diodes to be connected to the output driver with the compensated drive signals.
    • 一种设备驱动器,其包括输入驱动器,其被配置为产生一系列未补偿的驱动信号以及连接以接收未补偿的驱动信号并产生相应的经补偿的驱动信号的补偿电路。 补偿电路能够存储限定单个补偿曲线(例如贝塞尔曲线)的两个或更少控制点,补偿电路利用控制点将未补偿的驱动信号转换成相应的补偿驱动信号。 输出驱动器被配置为驱动诸如一个或多个发光二极管的装置以经补偿的驱动信号连接到输出驱动器。
    • 38. 发明授权
    • Display system with frame buffer and power saving sequence
    • 显示系统具有帧缓冲和省电顺序
    • US08416173B2
    • 2013-04-09
    • US11470247
    • 2006-09-05
    • Christopher A. Ludden
    • Christopher A. Ludden
    • G09G3/36
    • G09G3/3614G09G3/3648G09G3/3677G09G2310/0224G09G2310/0289G09G2330/021
    • A method is arranged to process a frame for an LCD with a modified polarity pattern. The pattern employs a polarity reversal scheme that results in line inversion and/or dot inversion patterns that are observable by pixel locations within the frame. The drive polarity for the column drivers in the LCD is toggled according to the modified polarity pattern. The scanning sequence for each row on the display is modified for cooperation with the pattern. A first subframe is scanned during a first interval while applying a first set of drive polarities. A second subframe is scanned during a second interval that is non-overlapping with the first time interval. The application of the method enables the column drivers in the LCD to operate with reduced power while retaining the benefits of line and dot inversion techniques.
    • 一种用于处理具有修改的极性图案的LCD的框架的方法。 该模式采用极性反转方案,其导致由框架内的像素位置可观察到的线反转和/或点反转模式。 LCD中的列驱动器的驱动极性根据修改的极性模式切换。 修改显示器上每一行的扫描顺序,以与图案协作。 在施加第一组驱动极性的同时,在第一间隔期间扫描第一子帧。 在与第一时间间隔不重叠的第二间隔期间扫描第二子帧。 该方法的应用使得LCD中的列驱动器能够以较低的功率运行,同时保留了线和点反转技术的优点。
    • 39. 发明授权
    • Extended range RMS-DC converter
    • 扩展范围RMS-DC转换器
    • US08401504B2
    • 2013-03-19
    • US12759568
    • 2010-04-13
    • Michael Hendrikus Laurentius Kouwenhoven
    • Michael Hendrikus Laurentius Kouwenhoven
    • H04B1/10
    • G06G7/16G01R19/02G01R19/22H04B1/30
    • Described herein is technology for, among other things, reducing offset errors in RMS-to-DC converters. The technology involves generating first and second feedback signals with first and second feedback paths respectively. A multiplier is then employed to receive first and second signals and provide a third signal based on multiplying the first signal and the second signal. The first signal is based on an input signal and the first feedback signal, and the second signal is based on the input signal and the second feedback signal. A chopper is then employed to receive an output signal, which is based on the third signal, and a chopping signal, and in turn provide a fourth signal based on multiplying the output signal with the chopping signal. As a consequence, the fourth signal represents the output signal shifted to a frequency different than that of low-frequency noise components of the first and second signals.
    • 这里描述的是减少RMS-DC转换器中的偏移误差的技术。 该技术涉及分别产生具有第一和第二反馈路径的第一和第二反馈信号。 然后采用乘法器来接收第一和第二信号,并且基于乘以第一信号和第二信号来提供第三信号。 第一信号基于输入信号和第一反馈信号,第二信号基于输入信号和第二反馈信号。 然后使用斩波器接收基于第三信号的输出信号和斩波信号,并且进而基于将输出信号与斩波信号相乘来提供第四信号。 结果,第四信号表示被转换到与第一和第二信号的低频噪声分量不同的频率的输出信号。