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    • 4. 发明授权
    • Charge pump circuit and voltage converter using the same
    • 电荷泵电路和电压转换器使用相同
    • US08232835B2
    • 2012-07-31
    • US12652267
    • 2010-01-05
    • Hyoung-rae KimHee-seok HanYoon-kyung Choi
    • Hyoung-rae KimHee-seok HanYoon-kyung Choi
    • G05F1/10
    • H02M3/07Y10T307/76
    • An apparatus for generating a voltage required for a semiconductor device by using a voltage supplied from an external power supply is provided. A charge pump circuit includes a first circuit comprising a first capacitor and a first group of switching elements and controlling the first group of switching elements according to first and second switching signals to transfer a voltage charged in the first capacitor to a target terminal during a first period and to charge the first capacitor with a reference voltage applied to a first input terminal of the first capacitor during a second period, and a second circuit comprising a second capacitor, a third capacitor connected between an output terminal and a ground terminal and a second group of switching elements, and controlling the second group of switching elements according to the first and second switching signals to connect a first terminal of the second capacitor to the ground terminal during the first period, connect the first terminal of the second capacitor to a power supply voltage input terminal during the second period, connect a second terminal of the second capacitor to the power supply voltage input terminal when a voltage of the second terminal of the second capacitor is lower than a voltage of the target terminal during the first period, and connect the second terminal of the second capacitor to the output terminal during the second period.
    • 提供一种通过使用从外部电源提供的电压来产生半导体器件所需的电压的装置。 电荷泵电路包括:第一电路,包括第一电容器和第一组开关元件,并且根据第一和第二开关信号控制第一组开关元件,以在第一电容器和第二开关元件期间将在第一电容器中充电的电压传送到目标端子 并且在第二时段期间用施加到第一电容器的第一输入端的参考电压对第一电容器充电;以及第二电路,包括第二电容器,连接在输出端子和接地端子之间的第三电容器,以及第二电容器 组开关元件,并且根据第一和第二开关信号控制第二组开关元件,以在第一时段期间将第二电容器的第一端子连接到接地端子,将第二电容器的第一端子连接到电源 电源电压输入端子,连接第二电容器的第二端子 在第一时段期间当第二电容器的第二端子的电压低于目标端子的电压时,连接到电源电压输入端子,并且在第二时段期间将第二电容器的第二端子连接到输出端子。
    • 7. 发明申请
    • CURRENT REFERENCE CIRCUIT
    • 电流参考电路
    • US20110043185A1
    • 2011-02-24
    • US12859335
    • 2010-08-19
    • Hyoung-Rae Kim
    • Hyoung-Rae Kim
    • G05F3/02
    • G05F3/242
    • A current reference circuit includes a proportional-to-absolute temperature (PTAT) current generator, a band-gap reference circuit and a current replication circuit. The PTAT generator generates a PTAT current. The band-gap reference circuit generates a reference voltage based on the PTAT current and generates a second current by cancelling a first current from the PTAT current. The first current has a zero temperature coefficient and the second current has a positive temperature coefficient. The current replication circuit replicates the first current based on the PTAT current and the second current.
    • 电流参考电路包括比例绝对温度(PTAT)电流发生器,带隙基准电路和电流复制电路。 PTAT发生器产生PTAT电流。 带隙基准电路基于PTAT电流产生参考电压,并通过从PTAT电流消除第一电流而产生第二电流。 第一电流具有零温度系数,第二电流具有正温度系数。 当前复制电路基于PTAT电流和第二电流复制第一电流。
    • 9. 发明授权
    • Gamma correction device, display apparatus including the same, and method of gamma correction therein
    • 伽马校正装置,包括该伽马校​​正装置的显示装置及其中的伽马校正方法
    • US07728854B2
    • 2010-06-01
    • US11335522
    • 2006-01-20
    • Hyoung-Rae KimJong-Seon Kim
    • Hyoung-Rae KimJong-Seon Kim
    • G09G5/00
    • G09G3/3696G09G3/3406G09G3/3648G09G2320/0276G09G2320/0626G09G2360/144
    • A gamma correction device and method thereof is described herein, in which gray-scale voltages may be generated that correspond with a plurality of gamma values. The gray-scale voltages may be generated by adjusting output ranges of the gray-scale voltages while fixing a gamma correction voltage on a constant level. The gamma correction device may include a gamma correction voltage generator generating a plurality of gamma correction voltages corresponding to a reference gamma value; a gray-scale voltage generation circuit dividing the gamma correction voltages to generate a plurality of sub gray-scale voltage sets each of which includes a sub gray-scale voltage corresponding to each gamma value; and a gray-scale voltage selection circuit outputting one of the sub gray-scale voltages of each sub gray-scale voltage set as a gray-scale voltage.
    • 本文描述了伽马校正装置及其方法,其中可以生成与多个伽马值对应的灰度电压。 灰度电压可以通过在将伽马校正电压固定在恒定水平上的同时调整灰度电压的输出范围来产生。 伽马校正装置可以包括产生对应于参考伽马值的多个伽马校正电压的伽马校正电压发生器; 灰度级电压产生电路,分割伽马校正电压以产生多个亚灰度级电压组,每个子灰度级电压组包括对应于每个伽马值的次灰度级电压; 以及灰度电压选择电路,输出设置为灰度级电压的每个副灰度级电压的子灰度级电压之一。
    • 10. 发明授权
    • Highly efficient LCD driving voltage generating circuit and method thereof
    • 高效LCD驱动电压发生电路及其方法
    • US07683898B2
    • 2010-03-23
    • US11540292
    • 2006-09-29
    • Jae-ho ParkHyoung-rae Kim
    • Jae-ho ParkHyoung-rae Kim
    • G09G5/00
    • G09G3/3696G09G2330/02
    • A highly efficient LCD driving voltage generating circuit and method consumes a relatively small amount of power, as compared to conventional means. The LCD driving voltage generating circuit comprises a DC-DC converter for boosting an input voltage in response to a clock signal and for outputting the boosted voltage as a first driving voltage; a voltage controlled oscillator for generating the clock signal at a frequency that changes in response to the level of a control voltage; and a control voltage generator for generating the control voltage in response to the difference between a reference voltage and a feedback voltage derived from the first driving voltage. In this manner, as the feedback voltage becomes lower than a reference voltage, the frequency of the clock signal input into a DC-DC converter increases. If the feedback voltage is lower than a predetermined voltage, this indicates that the level of the first driving voltage is lower than a predetermined value, and thus current consumption of the LCD panel is large. It is possible to decrease power consumption and increase boosting efficiency by changing the frequency of the clock signal used for boosting of a DC-DC converter according to the current consumption of the LCD panel.
    • 与传统方法相比,高效率的LCD驱动电压产生电路和方法消耗相对较小的功率。 LCD驱动电压发生电路包括:DC-DC转换器,用于响应时钟信号升压输入电压,并输出升压电压作为第一驱动电压; 用于以响应于控制电压的电平而变化的频率产生时钟信号的压控振荡器; 以及控制电压发生器,用于响应于参考电压和从第一驱动电压导出的反馈电压之间的差产生控制电压。 以这种方式,当反馈电压变得低于参考电压时,输入到DC-DC转换器的时钟信号的频率增加。 如果反馈电压低于预定电压,则表明第一驱动电压的电平低于预定值,因此LCD面板的电流消耗大。 根据LCD面板的电流消耗,通过改变用于升压DC-DC转换器的时钟信号的频率,可以降低功耗并提高提升效率。