公开(公告)号：US08064620B2

公开(公告)日：2011-11-22

申请号：US12229369

申请日：2008-08-22

申请人： Pei-Cheng Huang ,  Jwin-Yen Guo ,  Kuo-Chi Liu

发明人： Pei-Cheng Huang ,  Jwin-Yen Guo ,  Kuo-Chi Liu

IPC分类号： H04R3/00

CPC分类号： H04S3/008 ,  H04R5/04 ,  H04R19/02 ,  H04R2420/03

摘要： The present invention discloses a driver circuit for an electrostatic loudspeaker, comprising: a digital modulation encoder for receiving a digital audio signal and a fixed frequency pulse signal, and mixing them by modulation; a digital to analog converter for converting the output of the digital modulation encoder to an analog signal; a transformer for adjusting the voltage amplitude of the analog signal; and a demodulator for demodulating the adjusted analog signal to driver a speaker.

摘要翻译： 本发明公开了一种用于静电扬声器的驱动电路，包括：数字调制编码器，用于接收数字音频信号和固定频率脉冲信号，并通过调制进行混频; 数模转换器，用于将数字调制编码器的输出转换为模拟信号; 用于调整模拟信号的电压幅度的变压器; 以及用于将调整后的模拟信号解调为扬声器的解调器。

公开(公告)号：US07944289B2

公开(公告)日：2011-05-17

申请号：US12585917

申请日：2009-09-29

申请人： Pei-Cheng Huang ,  Jwin-Yen Guo

发明人： Pei-Cheng Huang ,  Jwin-Yen Guo

IPC分类号： H03F3/38

CPC分类号： H03F1/26 ,  H03F3/2173 ,  H03F2200/03 ,  H03F2200/351

摘要： For minimum pulse generation in a class-D amplifier, a trapezoid switching waveform shape is used to replace the tradition triangle type to generate PWM pulses. Two voltages are compared with a sawtooth wave signal to generate the trapezoid waveform signal and a constant pulse width signal. An audio input signal is compared with the trapezoid waveform signal to generate a pulse width modulation signal, and either the pulse width modulation signal or the constant pulse width signal is used for driving a load at an output of the class-D amplifier. Flexible minimum pulse width could be obtained by offsetting one of the two voltages in generation of the constant pulse width signal.

摘要翻译： 为了在D类放大器中产生最小的脉冲，采用梯形切换波形来替代传统的三角形类型以产生PWM脉冲。 将两个电压与锯齿波信号进行比较，以产生梯形波形信号和恒定的脉冲宽度信号。 将音频输入信号与梯形波形信号进行比较以产生脉宽调制信号，并且使用脉宽调制信号或恒定脉冲宽度信号来驱动D类放大器的输出端的负载。 可以通过在产生恒定脉冲宽度信号时抵消两个电压中的一个来获得灵活的最小脉冲宽度。

公开(公告)号：US08115542B2

公开(公告)日：2012-02-14

申请号：US12857855

申请日：2010-08-17

申请人： Pei-Cheng Huang ,  Jwin-Yen Guo ,  Shao-Ming Sun

发明人： Pei-Cheng Huang ,  Jwin-Yen Guo ,  Shao-Ming Sun

IPC分类号： H03F3/38

CPC分类号： H03F3/217

摘要： A class-D amplifier includes a ramp generator to provide a ramp signal having a frequency varying with an audio input signal, and a modulator to convert the audio input signal to a pulse width modulation signal according to the ramp signal for a driver to drive a load device. The varying frequency of the ramp signal will cause the frequency of the pulse width modulation signal unfixed and consequently improves EMI issue.

摘要翻译： D类放大器包括：斜坡发生器，用于提供具有随音频输入信号变化的频率的斜坡信号;以及调制器，用于根据用于驾驶员的驱动器的斜坡信号将音频输入信号转换为脉宽调制信号 负载设备 斜坡信号的变化频率将导致脉宽调制信号的频率不固定，从而改善EMI问题。

公开(公告)号：US20090080676A1

公开(公告)日：2009-03-26

申请号：US12229369

申请日：2008-08-22

申请人： Pei-Cheng Huang ,  Jwin-Yen Guo ,  Kuo-Chi Liu

发明人： Pei-Cheng Huang ,  Jwin-Yen Guo ,  Kuo-Chi Liu

IPC分类号： H04R3/00

CPC分类号： H04S3/008 ,  H04R5/04 ,  H04R19/02 ,  H04R2420/03

摘要： The present invention discloses a driver circuit for an electrostatic loudspeaker, comprising: a digital modulation encoder for receiving a digital audio signal and a fixed frequency pulse signal, and mixing them by modulation; a digital to analog converter for converting the output of the digital modulation encoder to an analog signal; a transformer for adjusting the voltage amplitude of the analog signal; and a demodulator for demodulating the adjusted analog signal to driver a speaker.

摘要翻译： 本发明公开了一种用于静电扬声器的驱动电路，包括：数字调制编码器，用于接收数字音频信号和固定频率脉冲信号，并通过调制进行混频; 数模转换器，用于将数字调制编码器的输出转换为模拟信号; 用于调整模拟信号的电压幅度的变压器; 以及用于将调整后的模拟信号解调为扬声器的解调器。

公开(公告)号：US08755539B2

公开(公告)日：2014-06-17

申请号：US12947148

申请日：2010-11-16

申请人： Pei-Cheng Huang ,  Jwin-Yen Guo

发明人： Pei-Cheng Huang ,  Jwin-Yen Guo

IPC分类号： H04R3/00

CPC分类号： H04R3/00 ,  H04R19/005

摘要： An electrostatic transducer loudspeaker includes a filterless class-D amplifier to modulate an audio input signal to generate a modulated signal containing a PWM switching carrier component, and a transformer directly connected at an output side of the filterless class-D amplifier and directly connected at an input side of an electrostatic transducer, whereby the equivalent capacitance of the electrostatic transducer and the equivalent inductance of the transformer establish a resonance circuit to demodulate the modulated signal to generate an AC voltage to drive the electrostatic transducer.

摘要翻译： 静电传感器扬声器包括无滤波D类放大器，用于调制音频输入信号以产生包含PWM切换载波分量的调制信号，以及直接连接在无滤波D类放大器的输出侧并直接连接到 静电换能器的等效电容和变压器的等效电感建立了谐振电路，以解调调制信号以产生AC电压来驱动静电换能器。

公开(公告)号：US20100079208A1

公开(公告)日：2010-04-01

申请号：US12585917

申请日：2009-09-29

申请人： Pei-Cheng Huang ,  Jwin-Yen Guo

发明人： Pei-Cheng Huang ,  Jwin-Yen Guo

IPC分类号： H03F3/217

CPC分类号： H03F1/26 ,  H03F3/2173 ,  H03F2200/03 ,  H03F2200/351

摘要： For minimum pulse generation in a class-D amplifier, a trapezoid switching waveform shape is used to replace the tradition triangle type to generate PWM pulses. Two voltages are compared with a sawtooth wave signal to generate the trapezoid waveform signal and a constant pulse width signal. An audio input signal is compared with the trapezoid waveform signal to generate a pulse width modulation signal, and either the pulse width modulation signal or the constant pulse width signal is used for driving a load at an output of the class-D amplifier. Flexible minimum pulse width could be obtained by offsetting one of the two voltages in generation of the constant pulse width signal.

摘要翻译： 为了在D类放大器中产生最小的脉冲，采用梯形切换波形来替代传统的三角形类型以产生PWM脉冲。 将两个电压与锯齿波信号进行比较，以产生梯形波形信号和恒定的脉冲宽度信号。 将音频输入信号与梯形波形信号进行比较以产生脉宽调制信号，并且使用脉宽调制信号或恒定脉冲宽度信号来驱动D类放大器的输出端的负载。 可以通过在产生恒定脉冲宽度信号时抵消两个电压中的一个来获得灵活的最小脉冲宽度。

公开(公告)号：US20120293082A1

公开(公告)日：2012-11-22

申请号：US13136383

申请日：2011-07-29

申请人： Pei-Cheng Huang ,  Kuo-Chi Liu ,  Ming-Hsueh Lee ,  Shih-Hua Chien ,  Chao-Hua Wu

发明人： Pei-Cheng Huang ,  Kuo-Chi Liu ,  Ming-Hsueh Lee ,  Shih-Hua Chien ,  Chao-Hua Wu

IPC分类号： H05B37/00

CPC分类号： H05B33/089

摘要： The present invention discloses a light emitting device open/short detection circuit, which is used for detecting at least one light emitting device string open/short. Each light emitting device string has a first end and a second end, wherein the first end is coupled to a voltage supply circuit to supply electrical power to the light emitting devices. The open/short detection circuit includes: an abnormal voltage detection circuit coupled to the light emitting device strings for receiving voltages of the second ends respectively and generating an abnormal voltage detection signal; a voltage setting circuit coupled to the abnormal voltage detection circuit for setting an abnormal reference level; and a determination circuit coupled to the voltage setting circuit. When the abnormal voltage detection signal is equal to or over the abnormal reference level, the determination circuit generates an open/short detection signal for an abnormal condition detected.

摘要翻译： 本发明公开了一种用于检测至少一个发光装置串开/短的发光装置开/短检测电路。 每个发光器件串具有第一端和第二端，其中第一端耦合到电压供应电路以向发光器件供电。 开/短检测电路包括：异常电压检测电路，耦合到发光器件串，用于分别接收第二端的电压并产生异常电压检测信号; 电压设定电路，与所述异常电压检测电路耦合，用于设定异常参考电平; 以及耦合到电压设置电路的确定电路。 当异常电压检测信号等于或超过异常参考电平时，确定电路产生检测到的异常状态的开/短检测信号。

公开(公告)号：US08450948B2

公开(公告)日：2013-05-28

申请号：US12977775

申请日：2010-12-23

申请人： Pei-Cheng Huang ,  Jing-Meng Liu

发明人： Pei-Cheng Huang ,  Jing-Meng Liu

IPC分类号： G05F1/00

CPC分类号： H05B33/0845 ,  Y02B20/341

摘要： By monitoring the temperature of an LED and the temperature of a controller chip for the LED, a thermal foldback control is employed to gradually decrease the driving current of the LED before the LED or the controller chip is over heated, so as to prevent an over temperature protection from being triggered to shutdown the controller chip to cause the LED to undesirably flicker.

摘要翻译： 通过监测LED的温度和LED的控制器芯片的温度，采用热折返控制来逐渐降低LED在LED或控制器芯片过热之前的驱动电流，以防止过度 温度保护不被触发以关闭控制器芯片，导致LED不期望地闪烁。

公开(公告)号：US20120326647A1

公开(公告)日：2012-12-27

申请号：US13232086

申请日：2011-09-14

申请人： Wei-Hsu Chang ,  Pei-Cheng Huang ,  Hao-Yu Chang ,  Yen-Shin Lai ,  Kuo-Chung Lee ,  Jo-Yu Wang ,  Yu-Kuang Wu ,  Chih-Chang Chen ,  Shiue-Shr Jiang ,  Jen-Hung Chi

发明人： Wei-Hsu Chang ,  Pei-Cheng Huang ,  Hao-Yu Chang ,  Yen-Shin Lai ,  Kuo-Chung Lee ,  Jo-Yu Wang ,  Yu-Kuang Wu ,  Chih-Chang Chen ,  Shiue-Shr Jiang ,  Jen-Hung Chi

IPC分类号： H02P6/18

CPC分类号： H02P6/182

摘要： A zero-crossing detection circuit and a commutation device using the zero-crossing detection circuit are provided. The zero-crossing detection circuit is adapted into a three-phase brushless DC (direct current) motor with first to third coils. One terminal of each of the first to third coils is electrically coupled together with each other. The detection circuit comprises a first selection circuit, a second selection circuit and a comparator. The first selection circuit and the second selection circuit are both electrically coupled to another terminals of the first to third coils, to obtain first to third terminal voltages, and output one of the first to third terminal voltages according to a selection signal. The comparator is configured for comparing an output of the first selection circuit and an output of the second selection circuit, to output a comparing result.

摘要翻译： 提供过零检测电路和使用过零检测电路的换向装置。 过零检测电路适用于具有第一至第三线圈的三相无刷直流（直流）电动机。 第一至第三线圈中的每一个的一个端子彼此电耦合。 检测电路包括第一选择电路，第二选择电路和比较器。 第一选择电路和第二选择电路都电耦合到第一至第三线圈的另一个端子，以获得第一至第三端子电压，并根据选择信号输出第一至第三端子电压中的一个。 比较器被配置为比较第一选择电路的输出和第二选择电路的输出，以输出比较结果。

公开(公告)号：US20120256892A1

公开(公告)日：2012-10-11

申请号：US13164159

申请日：2011-06-20

申请人： Chi-Ming HUNG ,  Chih-Ming Ma ,  Pei-Cheng Huang ,  Jun-Lin Huang

发明人： Chi-Ming HUNG ,  Chih-Ming Ma ,  Pei-Cheng Huang ,  Jun-Lin Huang

IPC分类号： G09G5/10

CPC分类号： G09G3/3406 ,  G09G2300/0456 ,  G09G2330/021 ,  G09G2360/144

摘要： A power-saving method adapted in a multi-mode display device is provided. The power-saving method comprises the steps as follows. A brightness of an ambient light is detected. When the brightness of the ambient light lies within a transmissive range, the multi-mode display device is operated in a transmissive mode and enables the backlight module of the multi-mode display. When the brightness of the ambient light lies within a transflective range, the multi-mode display device is operated in a transflective mode and the brightness of the backlight module is dynamically adjusted according to a compensation method. When the brightness of the ambient light lies within a reflective range, the multi-mode display device is operated in a reflective mode and turns off the backlight module.

摘要翻译： 提供了一种适用于多模式显示装置的省电方法。 省电方法包括以下步骤。 检测到环境光的亮度。 当环境光的亮度处于透射范围内时，多模式显示装置以透射模式工作，并使得多模式显示器的背光模块成为可能。 当环境光的亮度处于半透反射范围内时，多模式显示装置以透反射模式操作，并且根据补偿方法动态地调整背光模块的亮度。 当环境光的亮度处于反射范围内时，多模式显示装置以反射模式操作并且关闭背光模块。