Dimming method and system thereof
    1.
    发明授权
    Dimming method and system thereof 有权
    调光方法及其系统

    公开(公告)号:US07825882B2

    公开(公告)日:2010-11-02

    申请号:US11704244

    申请日:2007-02-09

    IPC分类号: G09G3/32

    摘要: A dimming method for LED driving circuit is proposed. By temporary switching a pin that is originally used for the input/output of other electric signals to a high impedance node, the dimming control signal may be inputted to dim LEDs. The dimming method comprises the steps of: floating the pin every a period of time to pull the pin's voltage being equal to the dimming control signal; detecting the pin's voltage; and retrieving the dimming control signal in accordance with the detected pin's voltage and thereafter dimming the LEDs.

    摘要翻译: 提出了一种LED驱动电路的调光方法。 通过将最初用于其他电信号的输入/输出的引脚临时切换到高阻抗节点,调光控制信号可以被输入到暗淡的LED。 该调光方法包括以下步骤:每隔一段时间浮动引脚以将引脚的电压拉至等于调光控制信号; 检测引脚的电压; 以及根据检测到的引脚的电压检索调光控制信号,然后对LED进行调光。

    Dimming method and system thereof
    2.
    发明申请
    Dimming method and system thereof 有权
    调光方法及其系统

    公开(公告)号:US20070132678A1

    公开(公告)日:2007-06-14

    申请号:US11704244

    申请日:2007-02-09

    IPC分类号: G09G3/32

    摘要: A dimming method for LED driving circuit is proposed. By temporary switching a pin that is originally used for the input/output of other electric signals to a high impedance node, the dimming control signal may be inputted to dim LEDs. The dimming method comprises the steps of: floating the pin every a period of time to pull the pin's voltage being equal to the dimming control signal; detecting the pin's voltage; and retrieving the dimming control signal in accordance with the detected pin's voltage and thereafter dimming the LEDs.

    摘要翻译: 提出了一种LED驱动电路的调光方法。 通过将最初用于其他电信号的输入/输出的引脚临时切换到高阻抗节点,调光控制信号可以被输入到暗淡的LED。 该调光方法包括以下步骤:每隔一段时间浮动引脚以将引脚的电压拉至等于调光控制信号; 检测引脚的电压; 以及根据检测到的引脚的电压检索调光控制信号,然后对LED进行调光。

    Dimming method and system thereof
    3.
    发明授权
    Dimming method and system thereof 失效
    调光方法及其系统

    公开(公告)号:US07368977B2

    公开(公告)日:2008-05-06

    申请号:US11288242

    申请日:2005-11-29

    IPC分类号: G05F1/10

    摘要: A dimming method for LED driving circuit is proposed. By temporary switching a pin that is originally used for the input/output of other electric signals to a high impedance node, the dimming control signal may be inputted to dim LEDs. The dimming method comprises the steps of: floating the pin every a period of time to pull the pin's voltage being equal to the dimming control signal; detecting the pin's voltage; and retrieving the dimming control signal in accordance with the detected pin's voltage and thereafter dimming the LEDs.

    摘要翻译: 提出了一种LED驱动电路的调光方法。 通过将最初用于其他电信号的输入/输出的引脚临时切换到高阻抗节点,调光控制信号可以被输入到暗淡的LED。 该调光方法包括以下步骤:每隔一段时间浮动引脚以将引脚的电压拉至等于调光控制信号; 检测引脚的电压; 以及根据检测到的引脚的电压检索调光控制信号,然后对LED进行调光。

    Dimming method and system thereof
    4.
    发明申请
    Dimming method and system thereof 失效
    调光方法及其系统

    公开(公告)号:US20060279565A1

    公开(公告)日:2006-12-14

    申请号:US11288242

    申请日:2005-11-29

    IPC分类号: G09G5/00

    摘要: A dimming method for LED driving circuit is proposed. By temporary switching a pin that is originally used for the input/output of other electric signals to a high impedance node, the dimming control signal may be inputted to dim LEDs. The dimming method comprises the steps of: floating the pin every a period of time to pull the pin's voltage being equal to the dimming control signal; detecting the pin's voltage; and retrieving the dimming control signal in accordance with the detected pin's voltage and thereafter dimming the LEDs.

    摘要翻译: 提出了一种LED驱动电路的调光方法。 通过将最初用于其他电信号的输入/输出的引脚临时切换到高阻抗节点,调光控制信号可以被输入到暗淡的LED。 该调光方法包括以下步骤:每隔一段时间浮动引脚以将引脚的电压拉至等于调光控制信号; 检测引脚的电压; 以及根据检测到的引脚的电压检索调光控制信号,然后对LED进行调光。

    Current regulator and method for efficiency improvement of a LED display system
    5.
    发明授权
    Current regulator and method for efficiency improvement of a LED display system 失效
    LED显示系统的电流调节器和效率改进方法

    公开(公告)号:US08138686B2

    公开(公告)日:2012-03-20

    申请号:US12588702

    申请日:2009-10-26

    IPC分类号: H05B37/02

    CPC分类号: H05B33/0848

    摘要: For efficiency improvement of a LED display system including a charge pump and a LED connected to either the voltage input terminal or the voltage output terminal of the charge pump, either one or both of two current regulators are enabled according to a voltage detected from the LED, for establishing a driving current for the LED. When the detected voltage is higher than a threshold, the first one of the current sources is enabled sole. When the detected voltage is lower than the threshold, the second one of the current sources is enabled sole, or both the current sources are enabled, or the current sources are alternatively enabled.

    摘要翻译: 为了提高LED显示系统的效率,包括电荷泵和连接到电荷泵的电压输入端子或电压输出端子的LED的LED显示系统,两个电流调节器中的一个或两个根据从LED检测的电压被使能 ,用于建立LED的驱动电流。 当检测到的电压高于阈值时,电流源中的第一个可以被单独使能。 当检测到的电压低于阈值时,第二个电流源被启用,或者两个电流源都被使能,或者当前源被备选地使能。

    Circuit and Method for Controlling Light Emitting Device, and Integrated Circuit Therefor
    6.
    发明申请
    Circuit and Method for Controlling Light Emitting Device, and Integrated Circuit Therefor 失效
    用于控制发光装置的电路和方法及其集成电路

    公开(公告)号:US20110169423A1

    公开(公告)日:2011-07-14

    申请号:US13072714

    申请日:2011-03-27

    IPC分类号: H05B37/02

    摘要: The present invention provides a transistor switch on a light emitting device channel, the transistor switch receiving a control voltage VG. A current source circuit controls the current on the light emitting device channel, the current source circuit requiring a minimum voltage VR for normal operation. The present invention further provides a dynamic headroom controller circuit which compares a voltage VS at a current outflow end of the transistor switch with the voltage VR to determine the relationship between the voltage VS and the voltage VR when the control voltage VG is higher than a reference voltage VH, and adjusts the voltage difference between the voltage VS and the voltage VR accordingly.

    摘要翻译: 本发明提供一种在发光器件通道上的晶体管开关,晶体管开关接收控制电压VG。 电流源电路控制发光器件通道上的电流,电流源电路需要用于正常操作的最小电压VR。 本发明还提供了一种动态裕量控制器电路,其将晶体管开关的电流流出端处的电压VS与电压VR进行比较,以在控制电压VG高于参考电压时确定电压VS与电压VR之间的关系 电压VH,并且相应地调整电压VS和电压VR之间的电压差。

    Offset cancellation of a single-ended operational amplifier
    7.
    发明授权
    Offset cancellation of a single-ended operational amplifier 有权
    单端运算放大器的偏移消除

    公开(公告)号:US07714645B2

    公开(公告)日:2010-05-11

    申请号:US12292061

    申请日:2008-11-12

    IPC分类号: H03F1/02 H03F3/45

    摘要: A single-ended operational amplifier includes an output stage, a first transconductance amplifier and a second transconductance amplifier. In an offset cancellation mode, two inputs of the first transconductance amplifier are supplied with a reference voltage to sink two currents from two inputs of the output stage respectively, the output stage generates a third current according to the difference between the two currents to charge a capacitor, and the second transconductance amplifier generates two currents according to the voltage in the capacitor to make currents in the two inputs of the output stage equal to each other, thereby canceling the offset of the single-ended operational amplifier.

    摘要翻译: 单端运算放大器包括输出级,第一跨导放大器和第二跨导放大器。 在偏移消除模式中,第一跨导放大器的两个输入端被提供有参考电压,以分别从输出级的两个输入端吸收两个电流,输出级根据两个电流之间的差产生第三电流,以对 电容器和第二跨导放大器根据电容器中的电压产生两个电流,以使输出级的两个输入端中的电流彼此相等,从而消除单端运算放大器的偏移。

    Low noise multiphase charge pump and control method thereof
    8.
    发明授权
    Low noise multiphase charge pump and control method thereof 有权
    低噪声多相电荷泵及其控制方法

    公开(公告)号:US07518432B2

    公开(公告)日:2009-04-14

    申请号:US11643851

    申请日:2006-12-22

    IPC分类号: G05F1/10

    CPC分类号: H02M3/07

    摘要: A low noise multiphase charge pump comprises a plurality of capacitors and a plurality of switches configured as a network, the switches are so switched that the charge pump operates in at least three phases by turns, and the operational durations and the operational currents of the phases are preferably balanced, so as to reduce the noise of the charge pump.

    摘要翻译: 低噪声多相电荷泵包括多个电容器和被配置为网络的多个开关,开关被切换,使得电荷泵至少在三相中工作,并且各相的工作持续时间和工作电流 优选地是平衡的,以便降低电荷泵的噪声。

    Low noise multiphase charge pump and control method thereof
    9.
    发明申请
    Low noise multiphase charge pump and control method thereof 有权
    低噪声多相电荷泵及其控制方法

    公开(公告)号:US20070152737A1

    公开(公告)日:2007-07-05

    申请号:US11643851

    申请日:2006-12-22

    IPC分类号: G05F1/10

    CPC分类号: H02M3/07

    摘要: A low noise multiphase charge pump comprises a plurality of capacitors and a plurality of switches configured as a network, the switches are so switched that the charge pump operates in at least three phases by turns, and the operational durations and the operational currents of the phases are preferably balanced, so as to reduce the noise of the charge pump.

    摘要翻译: 低噪声多相电荷泵包括多个电容器和被配置为网络的多个开关,开关被切换,使得电荷泵至少在三相中工作,并且各相的工作持续时间和工作电流 优选地是平衡的,以便降低电荷泵的噪声。

    Charge pump regulator and method of producing a regulated voltage
    10.
    发明授权
    Charge pump regulator and method of producing a regulated voltage 有权
    电荷泵调节器和产生调节电压的方法

    公开(公告)号:US08362823B2

    公开(公告)日:2013-01-29

    申请号:US12719251

    申请日:2010-03-08

    IPC分类号: G05F1/00

    CPC分类号: H02M3/07 H02M2001/0045

    摘要: A charge pump regulator has a charge pump to establish a charge path and a discharge path alternately, so as to produce a regulated voltage on an output terminal. The charge pump has at least a current control element on the charge path or the discharge path to control the current flowing therethrough according to an output-dependent feedback signal.

    摘要翻译: 电荷泵调节器具有电荷泵,以交替地建立充电路径和放电路径,以便在输出端子上产生调节电压。 电荷泵在充电路径或放电路径上至少具有电流控制元件,以根据输出相关的反馈信号来控制流过其中的电流。