公开(公告)号：US08159140B2

公开(公告)日：2012-04-17

申请号：US12553361

申请日：2009-09-03

申请人： Go Takata ,  Shinichiro Kataoka ,  Yasunori Yamamoto ,  Tsukasa Kawahara ,  Ryuji Ueda ,  Daisuke Itou

发明人： Go Takata ,  Shinichiro Kataoka ,  Yasunori Yamamoto ,  Tsukasa Kawahara ,  Ryuji Ueda ,  Daisuke Itou

IPC分类号： H05B37/00

CPC分类号： H05B33/0815 ,  H05B33/0824

摘要： The load driving apparatus according to the present invention includes a load current setting signal generating section, a load current generating section, a reference voltage generating section and a drive voltage generating section. The load current setting signal generating section generates a desired load current setting signal. The load current generating section generates a load current based on the load current setting signal to drive the load. The reference voltage generating section generates a reference voltage based on the load current setting signal. The drive voltage generating section generates a drive voltage, supplies the drive voltage to the load, generates a between-both-terminals voltage between both terminals of the load current generating section based on the drive voltage and controls the drive voltage so that the difference between the between-both-terminals voltage and the reference voltage becomes small.

摘要翻译： 根据本发明的负载驱动装置包括负载电流设定信号生成部，负载电流产生部，基准电压生成部和驱动电压生成部。 负载电流设定信号生成部生成期望的负载电流设定信号。 负载电流产生部根据负载电流设定信号生成负载电流，驱动负载。 参考电压产生部分基于负载电流设置信号产生参考电压。 驱动电压产生部生成驱动电压，向驱动电压供给驱动电压，根据驱动电压在负载电流产生部的两端之间产生两端电压，并控制驱动电压， 两端电压和参考电压变小。

公开(公告)号：US08878445B2

公开(公告)日：2014-11-04

申请号：US13314597

申请日：2011-12-08

申请人： Go Takata ,  Shinichiro Kataoka ,  Yasunori Yamamoto ,  Tsukasa Kawahara ,  Ryuji Ueda ,  Daisuke Itou

发明人： Go Takata ,  Shinichiro Kataoka ,  Yasunori Yamamoto ,  Tsukasa Kawahara ,  Ryuji Ueda ,  Daisuke Itou

IPC分类号： G09G3/36 ,  H05B33/08

CPC分类号： H05B33/089 ,  G09G3/3406 ,  G09G2320/0233 ,  H05B33/0815 ,  H05B33/0827 ,  H05B33/083

摘要： Short circuit failures and open circuit failures of light-emitting elements used for the backlight in an LCD panel can be reliably and easily detected. The voltage at the node between each series-connected light-emitting element array and a drive circuit is detected as a monitored voltage. A maximum detector detects the highest and a minimum detector detects the lowest of these monitored voltages. Short circuit or open circuit failure of a light-emitting element is detected by comparing the voltage difference between the maximum detector output and the minimum detector output with a specific reference voltage.

摘要翻译： 可以可靠且容易地检测用于LCD面板中的背光的发光元件的短路故障和开路故障。 每个串联连接的发光元件阵列和驱动电路之间的节点处的电压被检测为监视电压。 最大检测器检测到最高检测器，并且最小检测器检测到这些监控电压中的最低值。 通过将最大检测器输出和最小检测器输出之间的电压差与特定参考电压进行比较来检测发光元件的短路或开路故障。

公开(公告)号：US20110080397A1

公开(公告)日：2011-04-07

申请号：US12821413

申请日：2010-06-23

申请人： Yasunori Yamamoto ,  Shinichiro Kataoka ,  Tsukasa Kawahara ,  Go Takata ,  Ryuji Ueda ,  Daisuke Itou

发明人： Yasunori Yamamoto ,  Shinichiro Kataoka ,  Tsukasa Kawahara ,  Go Takata ,  Ryuji Ueda ,  Daisuke Itou

IPC分类号： G09G5/00 ,  H05B37/02 ,  G09G3/36

CPC分类号： G09G3/342 ,  G09G3/006 ,  H05B33/0827 ,  H05B33/0893

摘要： A backlight drive apparatus for current driving a plurality of strings has a period in which at least one of the strings is a current driven idly during a liquid crystal OFF period, in addition to a current driving period in which video information is displayed via liquid crystals. A failure detection section can monitor stabilized detection voltages in the period when current driven idly and detects failure state of the backlight panel.

摘要翻译： 用于电流驱动多个串的背光驱动装置除了通过液晶显示视频信息的当前驱动时段之外，还具有在液晶关闭期间串联中的至少一个是空载驱动的周期 。 故障检测部可以在电流驱动时检测到背光面板的故障状态的状态下监视稳定的检测电压。

公开(公告)号：US07622873B2

公开(公告)日：2009-11-24

申请号：US11548495

申请日：2006-10-11

申请人： Go Takata ,  Hideaki Mori ,  Yasunori Yamamoto

发明人： Go Takata ,  Hideaki Mori ,  Yasunori Yamamoto

IPC分类号： H02P29/04

CPC分类号： H02P6/182

摘要： A reverse current detection unit detects the direction of the motor current during the synchronous rectifier period based on the polarity of the on voltage of a switching device contained in the motor current path, and outputs a reverse current detection signal representing the result of this detection to the PWM control unit. Change in the output of the PWM control unit that generates the drive signal for a particular switching device in the drive unit is controlled based on the reverse current detection signal and the energizing pattern of the drive unit is changed when motor current is detected in the synchronous rectifier period to be flowing in the opposite direction as in the urging period. The flow of motor current to the power supply is thus reduced and a rise in the power supply voltage can be prevented.

摘要翻译： 反向电流检测单元根据电动机电流路径中包含的开关装置的导通电压的极性，在同步整流时段内检测电动机电流的方向，并将表示该检测结果的反向电流检测信号输出到 PWM控制单元。 基于反向电流检测信号来控制产生用于驱动单元中的特定开关装置的驱动信号的PWM控制单元的输出的变化，并且当在同步中检测到电动机电流时，驱动单元的通电模式被改变 整流器周期在与施力期相反的方向上流动。 电动机电流流向电源因此减少，并且可以防止电源电压的上升。

公开(公告)号：US08913363B2

公开(公告)日：2014-12-16

申请号：US13117606

申请日：2011-05-27

申请人： Go Takata ,  Yasunori Yamamoto

发明人： Go Takata ,  Yasunori Yamamoto

IPC分类号： H02H9/00 ,  G05F1/40 ,  H02M1/32 ,  H02M3/156 ,  H02M1/00

CPC分类号： H02M3/156 ,  H02M1/32 ,  H02M2001/0009

摘要： An overcurrent protection circuit includes: a determiner configured to determine whether or not the switch current exceeds a predetermined threshold, that is, the switch current is an overcurrent state when the switching element is turned ON; an OFF period setting counter configured to increase or decrease a counter output depending on a determination result of the determiner; and a drive signal generator configured to generate a drive signal of the switching element such that a length of an ON timing interval of the switching element corresponds to the counter output of the OFF period setting counter.

摘要翻译： 过电流保护电路包括：确定器，被配置为确定开关电流是否超过预定阈值，即开关电流是开关元件接通时的过电流状态; 关闭周期设定计数器，被配置为根据所述确定器的确定结果增加或减少计数器输出; 以及驱动信号发生器，被配置为产生所述开关元件的驱动信号，使得所述开关元件的导通定时间隔的长度对应于所述断开周期设定计数器的计数器输出。

公开(公告)号：US07402975B2

公开(公告)日：2008-07-22

申请号：US11548500

申请日：2006-10-11

申请人： Go Takata ,  Hideaki Mori ,  Yasunori Yamamoto

发明人： Go Takata ,  Hideaki Mori ,  Yasunori Yamamoto

IPC分类号： H02P1/24

CPC分类号： H02P27/08

摘要： A rise in the power supply voltage as a result of a sudden speed reducing command causing the motor current to flow to the power supply is prevented. The motor drive device has a drive signal generating unit for generating a drive signal by an energizing control unit, PWM control unit, and oscillation unit; a drive unit for producing drive power to drive the motor based on the drive signal; a torque control signal generating unit for generating a torque control signal specifying the motor torque; a speed detection unit for detecting the rotational speed of the motor and generating a rotational speed signal denoting motor speed information; and a decision unit for generating a speed difference detection signal denoting the difference between the torque control signal and the rotational speed signal. The drive signal generating unit is controlled based on the speed difference detection signal.

摘要翻译： 防止由于导致电动机电流流向电源的突然减速指令导致的电源电压的上升。 电机驱动装置具有用于通过激励控制部，PWM控制部和振荡部产生驱动信号的驱动信号生成部， 驱动单元，用于基于所述驱动信号产生用于驱动所述马达的驱动力; 转矩控制信号发生单元，用于产生指定电动机转矩的转矩控制信号; 速度检测单元，用于检测电动机的转速并产生表示电动机速度信息的转速信号; 以及判定单元，用于生成表示转矩控制信号和转速信号之间的差的速度差检测信号。 基于速度差检测信号来控制驱动信号生成部。

公开(公告)号：US08081199B2

公开(公告)日：2011-12-20

申请号：US12769399

申请日：2010-04-28

申请人： Go Takata ,  Hideyuki Nakanishi ,  Toshiki Onishi ,  Akihiro Yamamura ,  Takahiro Kobayashi

发明人： Go Takata ,  Hideyuki Nakanishi ,  Toshiki Onishi ,  Akihiro Yamamura ,  Takahiro Kobayashi

IPC分类号： G09G3/32 ,  G09G3/36 ,  G09G5/02

CPC分类号： H05B33/0815 ,  G09G3/342 ,  G09G2320/0233 ,  G09G2320/064 ,  G09G2330/021 ,  H05B33/0827 ,  Y02B20/346

摘要： A light emitting element drive apparatus that drives light emitting elements reduces power loss caused by variability between forward voltage drops of the light emitting elements. A plurality of voltage applying sections (1, 32 and 33; and 2, 34 and 35) generate application voltages based on a detection voltage determined based on a maximum forward voltage drop among the forward voltage drops of the light emitting element arrays (11 to 14), and apply the generated application voltages to the light emitting elements (11 to 14). Switching sections (30 and 31) switch between a plurality of voltage applying sections (1, 32 and 33; and 2, 34 and 35) to which the light emitting element arrays (11 to 14) individually connect. Controlling sections (40 to 42) control the switching sections (30 and 31) to switch connection to minimize the difference between forward voltage drops of light emitting element arrays (11 to 14).

摘要翻译： 驱动发光元件的发光元件驱动装置降低了由发光元件的正向电压降之间的变化引起的功率损耗。 多个电压施加部分（1,32和33;和2,34和35）基于基于发光元件阵列（11至22）的正向电压降中的最大正向压降确定的检测电压产生施加电压 14），并将生成的施加电压施加到发光元件（11〜14）。 开关部分（30和31）在发光元件阵列（11至14）单独连接的多个电压施加部分（1,32和33;以及2,34和35）之间切换。 控制部分（40至42）控制开关部分（30和31）以切换连接，以最小化发光元件阵列（11至14）的正向压降之间的差异。

公开(公告)号：US07166975B2

公开(公告)日：2007-01-23

申请号：US11355800

申请日：2006-02-16

申请人： Hideaki Mori ,  Go Takata

发明人： Hideaki Mori ,  Go Takata

IPC分类号： H02P6/02

CPC分类号： H02P6/16 ,  H02P6/15

摘要： A motor driving apparatus includes a motor driver which includes a parallel circuit in which a plurality of series circuits are connected in parallel. Each of the plurality of series circuits has a high side switching device and a low side switching device connected in series. A voltage detector detects a voltage at a neutral point of the multiphase motor and outputs the detected voltage as a first detection signal. A timing detector detects a timing at which a voltage of the first detection signal equals to a reference voltage, and outputs the detected timing as a second detection signal which is used to generate a plurality of driving signals for driving switching devices in the parallel circuit.

摘要翻译： 电动机驱动装置包括电动机驱动器，其包括并联电路，并联电路并联连接多个串联电路。 多个串联电路中的每一个具有串联连接的高侧开关装置和低侧开关装置。 电压检测器检测多相电动机的中性点处的电压，并将检测到的电压作为第一检测信号输出。 定时检测器检测第一检测信号的电压等于参考电压的定时，并将检测到的定时作为第二检测信号输出，该第二检测信号用于产生用于驱动并联电路中的开关器件的多个驱动信号。

公开(公告)号：US20060197480A1

公开(公告)日：2006-09-07

申请号：US11355800

申请日：2006-02-16

申请人： Hideaki Mori ,  Go Takata

发明人： Hideaki Mori ,  Go Takata

IPC分类号： H02P7/06

CPC分类号： H02P6/16 ,  H02P6/15

摘要： A motor driving apparatus includes a motor driver which includes a parallel circuit in which a plurality of series circuits are connected in parallel. Each of the plurality of series circuits has a high side switching device and a low side switching device connected in series. A voltage detector detects a voltage at a neutral point of the multiphase motor and outputs the detected voltage as a first detection signal. A timing detector detects a timing at which a voltage of the first detection signal equals to a reference voltage, and outputs the detected timing as a second detection signal which is used to generate a plurality of driving signals for driving switching devices in the parallel circuit.

摘要翻译： 电动机驱动装置包括电动机驱动器，其包括并联电路，并联电路并联连接多个串联电路。 多个串联电路中的每一个具有串联连接的高侧开关装置和低侧开关装置。 电压检测器检测多相电动机的中性点处的电压，并将检测到的电压作为第一检测信号输出。 定时检测器检测第一检测信号的电压等于参考电压的定时，并将检测到的定时作为第二检测信号输出，该第二检测信号用于产生用于驱动并联电路中的开关器件的多个驱动信号。