公开(公告)号：US11360150B2

公开(公告)日：2022-06-14

申请号：US17229640

申请日：2021-04-13

申请人： O2 Micro, Inc.

发明人： Guoxing Li

IPC分类号： G01R31/371 ,  H01M10/48 ,  G01R31/396 ,  H02J7/00 ,  H01M10/42

摘要： A battery management system includes multiple sensors, status detection circuitry, and fault detection circuitry. The sensors sense statuses of a battery pack. The status detection circuitry detects whether the battery pack is in a normal condition based on the statuses to generate a detection result. The fault detection circuitry detects whether a fault is present in the battery pack. The sensors include a current sensor that senses a battery current of the battery pack. The fault detection circuitry includes a detection circuit that monitors a rate of change of a voltage at a terminal of the battery pack, and detects whether a fault is present in the current sensor based on a result of a comparison between the rate of change and a threshold and based on the detection result.

公开(公告)号：US20130243332A1

公开(公告)日：2013-09-19

申请号：US13790093

申请日：2013-03-08

申请人： O2 MICRO INC.

发明人： Sterling Shyundii Du ,  Jingjing Zuo ,  Chengxia He ,  Qi Zhu

IPC分类号： G06K9/00

CPC分类号： G06K9/00597

摘要： Method and system for estimating an object of interest are provided. Visual information of a customer's face is obtained. Pupil location information indicative of at least a location of a pupil of an eye of the customer is determined based on the visual information. A field of view of the customer is determined based on the visual information. Then a focal point of the customer is determined based on the pupil location information, the field of view, and a predetermined focus condition. An object of interest of the customer is estimated based on the focal point. Information associated with the object is provided to the customer.

摘要翻译： 提供了用于估计感兴趣对象的方法和系统。 获得客户脸部的视觉信息。 基于视觉信息确定表示顾客的眼睛的瞳孔的位置的瞳孔位置信息。 基于视觉信息确定顾客的视野。 然后，基于瞳孔位置信息，视场和预定的对焦条件来确定顾客的焦点。 基于焦点估计客户感兴趣的对象。 与客户相关的信息被提供给客户。

公开(公告)号：US08120280B2

公开(公告)日：2012-02-21

申请号：US12856795

申请日：2010-08-16

申请人： Xinmin Yi ,  Ching-Chuan Kuo ,  Jianping Wang ,  Feng Shi

发明人： Xinmin Yi ,  Ching-Chuan Kuo ,  Jianping Wang ,  Feng Shi

IPC分类号： G05F1/00

CPC分类号： H05B33/0854

摘要： A driving circuit for controlling a light source includes a frequency controller and a switch module. The frequency controller is operable for receiving a first dimming signal for controlling the light source to achieve a predetermined brightness, and for generating a second dimming signal having a frequency out of one or more predetermined ranges according to the first dimming signal when the frequency of the first dimming signal is within the predetermined ranges. The switch module coupled to the frequency controller is operable for switching on and off alternately to achieve the predetermined brightness of the light source according to the second dimming signal when the frequency of the first dimming signal is within the predetermined ranges and according to the first dimming signal when the frequency of the first dimming signal is out of the predetermined ranges.

摘要翻译： 用于控制光源的驱动电路包括频率控制器和开关模块。 频率控制器可操作用于接收用于控制光源以实现预定亮度的第一调光信号，并且用于根据第一调光信号产生具有根据第一调光信号的一个或多个预定范围的频率的第二调光信号， 第一调光信号在预定范围内。 耦合到频率控制器的开关模块可操作用于当第一调光信号的频率在预定范围内且根据第一调光时交替地接通和断开以根据第二调光信号实现光源的预定亮度 当第一调光信号的频率超出预定范围时，发出信号。

公开(公告)号：US07173402B2

公开(公告)日：2007-02-06

申请号：US10786799

申请日：2004-02-25

申请人： Jiwei Chen ,  Guoxing Li

发明人： Jiwei Chen ,  Guoxing Li

IPC分类号： G05F1/44 ,  G05F3/16

CPC分类号： G05F1/575

摘要： A low dropout voltage regulator (LDO) includes a regulating circuit, an amplifier, and a first compensating path. The regulating circuit is configured to receive an input signal at an input terminal and provide an output signal at an output terminal in response to a control signal received at the control terminal. The amplifier may have a first input terminal coupled to a first input path and an output terminal be coupled to the control terminal of the regulating circuit via a path to provide the control signal. The first compensating path is coupled between a first node on the first input path and a first node on the path coupling the output terminal of the amplifier to the control terminal of the regulating circuit, the first compensating path including a first compensating capacitor.

摘要翻译： 低压差稳压器（LDO）包括调节电路，放大器和第一补偿路径。 调节电路被配置为在输入端接收输入信号，并响应于在控制端接收的控制信号在输出端提供输出信号。 放大器可以具有耦合到第一输入路径的第一输入端子，并且输出端子经由路径耦合到调节电路的控制端子以提供控制信号。 第一补偿路径耦合在第一输入路径上的第一节点和将放大器的输出端耦合到调节电路的控制端的路径上的第一节点之间，第一补偿路径包括第一补偿电容器。

公开(公告)号：US20140152187A1

公开(公告)日：2014-06-05

申请号：US13705546

申请日：2012-12-05

申请人： O2 MICRO INC.

发明人： Yung Lin LIN ,  Tiesheng YAN ,  Ching-Chuan KUO

IPC分类号： H05B37/02

CPC分类号： H05B33/0815 ,  H05B33/0845 ,  Y02B20/348

摘要： A circuit includes a bridge circuit, a converter, and a controller. The bridge circuit receives power from first and second power lines of a switch and generates a rectified voltage. The switch is capable of operating in a first state in which the switch conducts power to the first power line but not the second power line, a second state in which the switch conducts power to the second power line but not the first power line, and a third state in which the switch conducts power to both the first and second power lines. The converter converts the rectified voltage to an output voltage to drive a light source, and controls a current through the light source according to a driving signal. The controller monitors the operation state of the switch and generates the driving signal based on the operation state to control brightness/dimming of the light source.

摘要翻译： 电路包括桥接电路，转换器和控制器。 桥接电路从开关的第一和第二电源线接收电力，并产生整流电压。 该开关能够在第一状态下操作，在该第一状态下，开关向第一电力线路而不是第二电力线路通电，其中开关向第二电力线路而不是第一电力线路通电的第二状态，以及 第三状态，其中开关对第一和第二电力线都通电。 转换器将整流电压转换为输出电压以驱动光源，并根据驱动信号控制通过光源的电流。 控制器监视开关的操作状态，并根据操作状态生成驱动信号，以控制光源的亮度/调光。

公开(公告)号：US20140002027A1

公开(公告)日：2014-01-02

申请号：US13547476

申请日：2012-07-12

申请人： Qiang GUAN

发明人： Qiang GUAN

IPC分类号： H02J7/00

CPC分类号： H02J7/0022 ,  B60L2200/26 ,  H02J7/0014 ,  H02J7/1423 ,  H02J2007/0098 ,  Y02T10/7055

摘要： Method, system, and programs for regulating battery operation. A signal indicative of an atmospheric pressure outside a battery is first obtained. Based on the obtained signal, one or more parameters to be used for controlling an operation of the battery are then determined. Eventually, the operation of the battery is adjusted based on the determined one or more parameters.

摘要翻译： 用于调节电池运行的方法，系统和程序。 首先获得表示电池外部的大气压的信号。 基于获得的信号，然后确定要用于控制电池的操作的一个或多个参数。 最后，基于确定的一个或多个参数来调整电池的操作。

公开(公告)号：US08228004B2

公开(公告)日：2012-07-24

申请号：US12561888

申请日：2009-09-17

申请人： Ching-Chuan Kuo ,  Yung Lin Lin

发明人： Ching-Chuan Kuo ,  Yung Lin Lin

IPC分类号： G05F1/00

摘要： A circuit for driving a light source includes a voltage converter, a switch and a controller. The voltage converter converts an AC input voltage signal to a first rectified AC voltage signal. The voltage converter further generates an average signal proportional to an average voltage level of the first rectified AC voltage signal. The switch is coupled to the light source in series. The controller coupled to the voltage converter and the switch compares the first rectified AC voltage signal with the average signal to generate a pulse signal. The controller further generates a dimming control signal based on the pulse signal to control the switch thereby controlling dimming of the light source.

公开(公告)号：US07919936B2

公开(公告)日：2011-04-05

申请号：US12221648

申请日：2008-08-05

申请人： Da Liu ,  Yung-Lin Lin

发明人： Da Liu ,  Yung-Lin Lin

IPC分类号： H05B37/02

CPC分类号： H05B33/0827

摘要： There is provided a driving circuit for powering a plurality of light sources. The driving circuit includes a power converter, a plurality of switching regulators and a plurality of switching balance controllers. The power converter is operable for receiving an input voltage and for providing a regulated voltage to the light sources. The switching regulators are operable for adjusting forward voltages of the light sources respectively. The switching balance controllers are operable for generating pulse modulation signals to control the switching regulators respectively.

摘要翻译： 提供了用于为多个光源供电的驱动电路。 驱动电路包括功率转换器，多个开关调节器和多个开关平衡控制器。 功率转换器可操作用于接收输入电压并向光源提供调节电压。 开关调节器可操作用于分别调节光源的正向电压。 开关平衡控制器可用于产生脉冲调制信号以分别控制开关稳压器。

公开(公告)号：US07130930B1

公开(公告)日：2006-10-31

申请号：US11026697

申请日：2004-12-30

申请人： Reginia Chan ,  James Lam

发明人： Reginia Chan ,  James Lam

IPC分类号： G06F13/00 ,  G11B17/22

CPC分类号： G11B33/12 ,  G06F1/3203 ,  G06F1/3287 ,  G11B31/02 ,  Y02D10/171

摘要： A low-power audio CD player for portable computers permits operation of the CD-ROM subsystem when power is not being supplied to the computer subsystem. In one embodiment of the invention, the computer subsystem comprises a system CPU, a digital-audio generating circuit, a digital computer bus coupling the CPU and the digital-audio generator circuit, and a digital computer bus controller. The CD audio subsystem comprises an audio device capable of playing an audio CD and coupled to the digital computer bus controller, an audio amplifier circuit coupled to the audio device, and an audio interface coupled to the digital computer bus in parallel to the digital computer bus controller and the audio device. The audio interface is adapted to generate signals to operate the audio device and play the audio CD when power is not being supplied to the computer subsystem or to the CPU. In method form, a method for playing an audio CD in a computer system comprises deenergizing a computer CPU; and controlling, using an audio interface coupled to a digital computer bus in parallel to a digital computer bus controller and an audio device capable of playing an audio CD, the audio device and a computer audio amplifier to play an audio CD without supplying energy to the CPU.

摘要翻译： 用于便携式计算机的低功率音频CD播放机允许在没有向计算机子系统供电的情况下操作CD-ROM子系统。 在本发明的一个实施例中，计算机子系统包括系统CPU，数字音频发生电路，耦合CPU和数字音频发生器电路的数字计算机总线以及数字计算机总线控制器。 CD音频子系统包括能够播放音频CD并耦合到数字计算机总线控制器的音频设备，耦合到音频设备的音频放大器电路以及与数字计算机总线并行连接到数字计算机总线的音频接口 控制器和音频设备。 音频接口适于产生信号以操作音频设备，并且当未向计算机子系统或CPU供电时播放音频CD。 在方法形式中，用于在计算机系统中播放音频CD的方法包括使计算机CPU断电; 以及使用耦合到数字计算机总线的音频接口并行地控制数字计算机总线控制器和能够播放音频CD的音频设备，音频设备和计算机音频放大器来播放音频CD而不向 中央处理器。

公开(公告)号：US07126289B2

公开(公告)日：2006-10-24

申请号：US10923188

申请日：2004-08-20

申请人： Yung-Lin Lin ,  Da Liu

发明人： Yung-Lin Lin ,  Da Liu

IPC分类号： H05B37/02

CPC分类号： H05B41/2813 ,  Y02B20/22

摘要： The present invention provides a driving circuit with protection function for driving a set of external electrode fluorescent lamps (EEFL). The drive circuit includes a transformer connected to the set of EEFLs, a switching network connected to the transformer which delivers power to the transformer, a sensing circuit connected to the set of EEFLs which detects disconnection if one light source is disconnected, and a controller connected to the switching network which controls the switching network to reduce the total current supplied to the EEFLs which remain connected, if the sensing circuit detects that one EEFL is disconnected. Appropriate protection can therefore be implemented when the EEFL is disconnected on one end or both ends.

摘要翻译： 本发明提供一种具有用于驱动一组外部电极荧光灯（EEFL）的保护功能的驱动电路。 所述驱动电路包括连接到所述一组EEFL的变压器，连接到所述变压器的开关网络，所述变压器向所述变压器供电;连接到所述一组EEFL的感测电路，其中如果一个光源断开，则检测断开连接;以及控制器连接 如果感测电路检测到一个EEFL断开，则控制切换网络的交换网络减少提供给保持连接的EEFL的总电流。 因此，当EEFL在一端或两端断开时，可以实现适当的保护。