公开(公告)号：US08493300B2

公开(公告)日：2013-07-23

申请号：US12046280

申请日：2008-03-11

申请人： Hendrik Santo ,  Ranajit Ghoman ,  Dilip Sangam ,  Kien Vi

发明人： Hendrik Santo ,  Ranajit Ghoman ,  Dilip Sangam ,  Kien Vi

IPC分类号： G09G3/36

CPC分类号： H05B33/0842

摘要： The present invention involves an electrical system in which an analog signal channel passes through various integrated circuit chips (ICs). The channel can carry one or more analog signals. Each IC can modify the signal(s) passing through it and pass it on to another IC or system component. The channel can be programmable. Each IC can include a comparator or a multiplexor to receive the channel signal from another IC or system component and to modify the received signal before transmitting it to another IC or system component. The comparator or the multiplexor can be programmable and can be selectively configured to compare the incoming signal from the channel with a variety of other signals and thresholds, or to simply act as a flow through gate and allow the signal to pass without any modification. The comparison can determine the output of the comparator. The operation and programming of the comparators, the multiplexors and the channel can be centrally controlled by a system controller, can be independently controlled by the ICs, or a combination thereof.

公开(公告)号：US08222910B2

公开(公告)日：2012-07-17

申请号：US12504308

申请日：2009-07-16

申请人： Dilip Sangam ,  Hendrik Santo ,  Sean Chen ,  Minjong Kim ,  Sivaprakash Kannan ,  Balaji Virajpet

发明人： Dilip Sangam ,  Hendrik Santo ,  Sean Chen ,  Minjong Kim ,  Sivaprakash Kannan ,  Balaji Virajpet

IPC分类号： G01R31/02

CPC分类号： G01R31/3163 ,  G01R31/3187

摘要： The innovation relates to systems and/or methodologies for error detection during sub-assembly in high voltage analog circuits. A signal driver communicates test signals to one or more high voltage analog circuits, and a state machine compares the electrical and/or thermal responses of the high voltage analog circuits to a set of predetermined expected results (e.g., signatures). The signal driver and state machine can be incorporated into the high voltage analog circuits. The expected results can be stored in the target circuits in the form of look-up tables, matrices, and so forth. Errors, such as, dry solders and bridge solders can be determined based on the comparison of the obtained responses to the expected signatures.

摘要翻译： 该创新涉及用于在高压模拟电路中的子组装期间的错误检测的系统和/或方法。 信号驱动器将测试信号传送到一个或多个高压模拟电路，并且状态机将高压模拟电路的电和/或热响应与一组预定的预期结果（例如，签名）进行比较。 信号驱动器和状态机可以并入高压模拟电路。 预期结果可以以查询表，矩阵等的形式存储在目标电路中。 可以根据获得的对预期签名的响应的比较来确定干焊料和桥焊机等错误。

公开(公告)号：US08217887B2

公开(公告)日：2012-07-10

申请号：US12018399

申请日：2008-01-23

申请人： Dilip Sangam ,  Hendrik Santo ,  Tushar Dhayagude ,  Klen Vi ,  Sean Chen

发明人： Dilip Sangam ,  Hendrik Santo ,  Tushar Dhayagude ,  Klen Vi ,  Sean Chen

IPC分类号： G09G3/36

CPC分类号： G09G3/3426 ,  G09G3/3413 ,  G09G2310/0237 ,  G09G2310/024 ,  G09G2320/0633 ,  G09G2320/0666 ,  G09G2360/144

摘要： The present invention discloses apparatus and techniques relating to the intelligent control of a display's backlight LED strings. The present invention provides for controlling the display intensity on a region-by-region basis and for adjusting the intensity multiple times within the duration of a frame. The present invention also provides backlight adjustment in a manner that emphasizes certain colors and deemphasizes certain colors. The present invention also provides for adjustment of the backlight based on the ambient temperature.

摘要翻译： 本发明公开了与显示器的背光LED串的智能控制相关的装置和技术。 本发明提供了在逐帧的基础上控制显示强度并且在帧的持续时间内多次调整强度。 本发明还以强调某些颜色并且强调某些颜色的方式提供背光调整。 本发明还提供了基于环境温度来调节背光。

公开(公告)号：US20100237786A1

公开(公告)日：2010-09-23

申请号：US12649057

申请日：2009-12-29

申请人： Hendrik Santo ,  Matthew D. Schindler ,  Dilip S. ,  Tushar Dhayagude

发明人： Hendrik Santo ,  Matthew D. Schindler ,  Dilip S. ,  Tushar Dhayagude

IPC分类号： H05B37/02

CPC分类号： H05B33/0851 ,  G09G3/342 ,  H05B33/0842

摘要： The present invention relates to circuits and methods for controlling one or more LED strings. The circuit comprises a programmable controller coupled to one or more detectors, wherein the one or more detectors are configured to detect one or more measurable parameters of one or more LEDs or LED drivers. The controller is configured to receive information from the one or more detectors related to the one or more measurable parameters and use that information to determine the desired drive voltage for the LED strings. The controller is associated with a power supply having power factor correction (PFC) capability. The controller provides the power supply with a control signal indicative of the desired drive voltage for one or more LED strings. The power supply also receives ac voltage and current waveforms as inputs and performs power factor correction and rectified waveforms related to the ac waveforms. The power supply generates the desired drive voltage based on the control signal.

摘要翻译： 本发明涉及用于控制一个或多个LED串的电路和方法。 电路包括耦合到一个或多个检测器的可编程控制器，其中所述一个或多个检测器被配置为检测一个或多个LED或LED驱动器的一个或多个可测量的参数。 控制器被配置为从与一个或多个可测量参数相关的一个或多个检测器接收信息，并使用该信息来确定LED串所需的驱动电压。 控制器与具有功率因数校正（PFC）能力的电源相关联。 控制器为电源提供指示一个或多个LED串的期望驱动电压的控制信号。 电源还接收交流电压和电流波形作为输入，并进行与交流波形相关的功率因数校正和整流波形。 电源根据控制信号产生所需的驱动电压。

公开(公告)号：US07598800B2

公开(公告)日：2009-10-06

申请号：US11805523

申请日：2007-05-22

申请人： Gurjit S. Thandi ,  Dilip S ,  Hendrik Santo ,  Kien Vi

发明人： Gurjit S. Thandi ,  Dilip S ,  Hendrik Santo ,  Kien Vi

IPC分类号： G05F1/10

CPC分类号： G05F3/205

摘要： The present invention uses two transistors instead of a sensing resistor to provide a constant current source for a load such as an array of light emitting diodes (“LEDs”). In the present invention, a bias current is applied to a branch of the circuit. The drain-to-source voltages of two transistors are matched. The voltage at the gate of both transistors is controlled based on the bias current and the drain-to-source current of the first of the two transistors. The second of the two transistors is sized such that source current of the second transistor is a multiple of the source current of the first transistor for a given gate voltage. By the techniques of this invention, the load current in a circuit is efficiently kept constant at a multiple of the input bias current.

摘要翻译： 本发明使用两个晶体管代替感测电阻器来为诸如发光二极管阵列（“LED”）的负载提供恒定电流源。 在本发明中，偏置电流被施加到电路的支路。 两个晶体管的漏极 - 源极电压匹配。 基于两个晶体管中的第一个的偏置电流和漏极 - 源极电流来控制两个晶体管的栅极处的电压。 两个晶体管中的第二个的尺寸使得第二晶体管的源电流对于给定的栅极电压是第一晶体管的源极电流的倍数。 通过本发明的技术，电路中的负载电流被有效地保持恒定在输入偏置电流的倍数。

公开(公告)号：US20090230882A1

公开(公告)日：2009-09-17

申请号：US12046280

申请日：2008-03-11

申请人： Hendrik Santo ,  Ranajit Ghoman ,  S. Dilip

发明人： Hendrik Santo ,  Ranajit Ghoman ,  S. Dilip

IPC分类号： H05B37/02 ,  H03K5/01 ,  H03K5/00

CPC分类号： H05B33/0842

摘要： The present invention involves an electrical system in which an analog signal channel passes through various integrated circuit chips (ICs). The channel can carry one or more analog signals. Each IC can modify the signal(s) passing through it and pass it on to another IC or system component. The channel can be programmable. Each IC can include a comparator or a multiplexor to receive the channel signal from another IC or system component and to modify the received signal before transmitting it to another IC or system component. The comparator or the multiplexor can be programmable and can be selectively configured to compare the incoming signal from the channel with a variety of other signals and thresholds, or to simply act as a flow through gate and allow the signal to pass without any modification. The comparison can determine the output of the comparator. The operation and programming of the comparators, the multiplexors and the channel can be centrally controlled by a system controller, can be independently controlled by the ICs, or a combination thereof.

摘要翻译： 本发明涉及一种电气系统，其中模拟信号通道通过各种集成电路芯片（IC）。 通道可以携带一个或多个模拟信号。 每个IC可以修改通过它的信号并将其传递到另一个IC或系统组件。 通道可编程。 每个IC可以包括比较器或多路复用器，以从另一个IC或系统组件接收信道信号，并且在将其发送到另一IC或系统组件之前修改接收的信号。 比较器或多路复用器可以是可编程的，并且可以被选择性地配置为将来自信道的输入信号与各种其他信号和阈值进行比较，或者简单地充当通过门的流，并允许信号通过而不进行任何修改。 比较可以确定比较器的输出。 比较器，多路复用器和通道的操作和编程可以由系统控制器集中控制，可以由IC独立控制或其组合。

公开(公告)号：US5498995A

公开(公告)日：1996-03-12

申请号：US355427

申请日：1994-12-13

申请人： Thomas Szepesi ,  Hendrik Santo

发明人： Thomas Szepesi ,  Hendrik Santo

IPC分类号： H02M1/00 ,  H02M3/335 ,  G05F1/10

CPC分类号： H02M3/33507 ,  H02M1/32

摘要： Improved controller circuitry for a switching power supply is disclosed. The switching power supply is of the type having a transformer having primary and secondary windings for generating an output voltage at the secondary winding, a power switch for driving the primary winding, and controller circuitry for activating the power switch. The improved controller circuitry includes an oscillator and frequency shift means. The oscillator generates PWM pulses having a predetermined frequency for use in activating the power switch. The frequency shift means gradually shifts the frequency of the PWM pulses at a shift rate in response to the output voltage decreasing to below a threshold level. In another embodiment, a controller for use in a switching power supply includes an oscillator for generating PWM pulses having a predetermined frequency which determine the switching condition of the supply. Frequency shift means is used gradually shifting the frequency of the PWM pulses at a shift rate in response to an output voltage of the switching power supply decreasing to below a threshold level, and programming means is used for programming the shift rate and the threshold level.

摘要翻译： 公开了用于开关电源的改进的控制器电路。 开关电源具有变压器，其具有用于产生次级绕组上的输出电压的初级和次级绕组，用于驱动初级绕组的电源开关和用于启动电源开关的控制器电路。 改进的控制器电路包括振荡器和频移装置。 振荡器产生具有预定频率的PWM脉冲，用于激活电源开关。 频移装置响应于输出电压降低到阈值水平以下，以移位速率逐渐移动PWM脉冲的频率。 在另一个实施例中，用于开关电源的控制器包括用于产生具有预定频率的PWM脉冲的振荡器，该脉冲确定电源的开关状态。 使用频移装置响应于开关电源的输出电压降低到阈值电平，以移位速率逐渐移动PWM脉冲的频率，并且使用编程装置对移位速率和阈值电平进行编程。

公开(公告)号：US08441199B2

公开(公告)日：2013-05-14

申请号：US12649057

申请日：2009-12-29

申请人： Hendrik Santo ,  Matthew D. Schindler ,  Dilip Sangam ,  Tushar Dhayagude

发明人： Hendrik Santo ,  Matthew D. Schindler ,  Dilip Sangam ,  Tushar Dhayagude

IPC分类号： H05B41/36

CPC分类号： H05B33/0851 ,  G09G3/342 ,  H05B33/0842

摘要： The present invention relates to circuits and methods for controlling one or more LED strings. The circuit comprises a programmable controller coupled to one or more detectors, wherein the one or more detectors are configured to detect one or more measurable parameters of one or more LEDs or LED drivers. The controller is configured to receive information from the one or more detectors related to the one or more measurable parameters and use that information to determine the desired drive voltage for the LED strings. The controller is associated with a power supply having power factor correction (PFC) capability. The controller provides the power supply with a control signal indicative of the desired drive voltage for one or more LED strings. The power supply also receives ac voltage and current waveforms as inputs and performs power factor correction and rectified waveforms related to the ac waveforms. The power supply generates the desired drive voltage based on the control signal.

摘要翻译： 本发明涉及用于控制一个或多个LED串的电路和方法。 电路包括耦合到一个或多个检测器的可编程控制器，其中所述一个或多个检测器被配置为检测一个或多个LED或LED驱动器的一个或多个可测量的参数。 控制器被配置为从与一个或多个可测量参数相关的一个或多个检测器接收信息，并使用该信息来确定LED串所需的驱动电压。 控制器与具有功率因数校正（PFC）能力的电源相关联。 控制器为电源提供指示一个或多个LED串的期望驱动电压的控制信号。 电源还接收交流电压和电流波形作为输入，并进行与交流波形相关的功率因数校正和整流波形。 电源根据控制信号产生所需的驱动电压。

公开(公告)号：US08378957B2

公开(公告)日：2013-02-19

申请号：US12111114

申请日：2008-04-28

申请人： Hendrik Santo ,  Kien Vi ,  Dilip S

发明人： Hendrik Santo ,  Kien Vi ,  Dilip S

IPC分类号： G09G3/36

CPC分类号： H03K17/18

摘要： The present invention relates to circuits and methods for detecting transistor operation in the triode region including a circuit for a transistor in a constant current source. The circuit comprises a detector having a first input, a second input, and an output. The first input of the detector is coupled to the source of the transistor and the second input of the detector is coupled to the set point terminal of the constant current source. The circuit also comprises a flag coupled to the detector output. The detector has parameters selected so that, when the voltage at the source of the transistor satisfies a reference condition, the output of the detector sets the flag. The reference condition is established relative to the voltage at the set point terminal of the constant current source and relative to the triode transition voltage of the transistor at a selected drain-source current.

摘要翻译： 本发明涉及用于检测三极管区域中的晶体管工作的电路和方法，包括恒流源中的晶体管的电路。 电路包括具有第一输入，第二输入和输出的检测器。 检测器的第一输入耦合到晶体管的源极，并且检测器的第二输入端耦合到恒流源的设定点端子。 电路还包括耦合到检测器输出的标志。 检测器具有选择的参数，使得当晶体管的源极处的电压满足参考条件时，检测器的输出设置标志。 相对于恒定电流源的设定点端子处的电压并且相对于所选择的漏极 - 源极电流下的晶体管的三极管转换电压，建立参考条件。

公开(公告)号：US08314572B2

公开(公告)日：2012-11-20

申请号：US12409088

申请日：2009-03-23

申请人： Matthew Schindler ,  Tushar Dhayagude ,  Hendrik Santo ,  Dilip Sangam

发明人： Matthew Schindler ,  Tushar Dhayagude ,  Hendrik Santo ,  Dilip Sangam

IPC分类号： H05B37/02

CPC分类号： G09G3/342

摘要： The present invention relates to circuits and methods for controlling one or more LED strings. The circuit comprises a programmable controller coupled to one or more detectors, wherein the one or more detectors are configured to detect one or more measurable parameters of one or more LEDs or LED drivers. The controller is configured to receive information from the one or more detectors related to the one or more measurable parameters and use that information to determine the desired drive voltage for the LED strings. The controller is associated with a power supply having power factor correction (PFC) capability. The controller provides the power supply with a control signal indicative of the desired drive voltage for one or more LED strings. The power supply also receives ac voltage and current waveforms as inputs and performs power factor correction and rectified waveforms related to the ac waveforms. The power supply generates the desired drive voltage based on the control signal.

摘要翻译： 本发明涉及用于控制一个或多个LED串的电路和方法。 电路包括耦合到一个或多个检测器的可编程控制器，其中所述一个或多个检测器被配置为检测一个或多个LED或LED驱动器的一个或多个可测量的参数。 控制器被配置为从与一个或多个可测量参数相关的一个或多个检测器接收信息，并使用该信息来确定LED串所需的驱动电压。 控制器与具有功率因数校正（PFC）能力的电源相关联。 控制器为电源提供指示一个或多个LED串的期望驱动电压的控制信号。 电源还接收交流电压和电流波形作为输入，并进行与交流波形相关的功率因数校正和整流波形。 电源根据控制信号产生所需的驱动电压。