公开(公告)号：US20090045789A1

公开(公告)日：2009-02-19

申请号：US12256861

申请日：2008-10-23

申请人： Yoshikazu SASAKI ,  Isao YAMAMOTO ,  Masao YONEMARU

发明人： Yoshikazu SASAKI ,  Isao YAMAMOTO ,  Masao YONEMARU

IPC分类号： G05F1/56

CPC分类号： G05F1/56 ,  H02M1/08 ,  H02M1/32

摘要： A power supply circuit includes a standard voltage generator; a regulator to control an output voltage, and to be capable of being switched ON/OFF; a capacitor in parallel between the standard voltage generator and the regulator; a discharging circuit including a first switch and a second switch configured to discharge electrical charges from the capacitor via the second switch while the regulator is in an OFF state; and a starting controller configured to transmit a signal for controlling the first switch and the second switch. The first switch is connected in series between the standard voltage generator and the regulator. The second switch has one end connected to a connection node between the first switch and the regulator, and has another end connected to a ground. When the first switch is in OFF state, the second switch is turned to ON state while the regulator is in OFF state.

摘要翻译： 电源电路包括标准电压发生器; 用于控制输出电压并且能够被接通/断开的调节器; 在标准电压发生器和调节器之间并联的电容器; 放电电路，包括第一开关和第二开关，所述第二开关被配置为在所述调节器处于OFF状态时经由所述第二开关从所述电容器放电电荷; 以及启动控制器，被配置为发送用于控制所述第一开关和所述第二开关的信号。 第一个开关串联在标准电压发生器和调节器之间。 第二开关的一端连接到第一开关和调节器之间的连接节点，另一端连接到地。 当第一开关处于OFF状态时，第二开关在调节器处于OFF状态时转为ON状态。

公开(公告)号：US20090108827A1

公开(公告)日：2009-04-30

申请号：US12345493

申请日：2008-12-29

申请人： Yoshikazu SASAKI ,  Tetsuro HASHIMOTO ,  Isao YAMAMOTO

发明人： Yoshikazu SASAKI ,  Tetsuro HASHIMOTO ,  Isao YAMAMOTO

IPC分类号： G05F5/00

CPC分类号： H02M1/36 ,  Y10S323/901

摘要： An under voltage lock out circuit which monitors an input voltage and executes a predetermined sequence when the input voltage satisfies a predetermined condition may include a voltage comparison unit which compares the input voltage and a predetermined threshold voltage, and outputs a comparison signal; a logic circuit which receives the comparison signal output from the voltage comparison unit and a start-up signal instructing start-up of an equipment mounted with the under voltage lock out circuit, and asserts a sequence control signal when start-up is instructed by the start-up signal in a state the input voltage is higher than the threshold voltage; and a sequence circuit which executes a predetermined sequence when the sequence control signal is asserted, wherein the predetermined threshold voltage is switched according to the sequence control signal.

摘要翻译： 当输入电压满足预定条件时，监视输入电压并执行预定序列的欠压锁定电路可以包括比较输入电压和预定阈值电压并输出比较信号的电压比较单元; 接收从电压比较单元输出的比较信号的逻辑电路和指示安装有欠压锁定电路的设备的起动信号的启动信号，并且当启动指示时启动序列控制信号 启动信号处于输入电压高于阈值电压的状态; 以及当所述序列控制信号被断言时执行预定序列的序列电路，其中根据所述序列控制信号切换所述预定阈值电压。

公开(公告)号：US20110080989A1

公开(公告)日：2011-04-07

申请号：US12968778

申请日：2010-12-15

申请人： Tetsuro HASHIMOTO ,  Akihito ITO ,  Yoshikazu SASAKI ,  Isao YAMAMOTO

发明人： Tetsuro HASHIMOTO ,  Akihito ITO ,  Yoshikazu SASAKI ,  Isao YAMAMOTO

IPC分类号： G06M3/02

CPC分类号： G06F1/24 ,  G06F1/26 ,  G06F1/28

摘要： A start-up circuit receives a start-up signal instructing start-up of an equipment mounted with the circuit, and executes a predetermined sequence when start-up is instructed by the start-up signal. An oscillator generates a clock signal. A sequence circuit receives the start-up signal and a clock signal output from the oscillator, measures time by counting the clock signal when the start-up signal transits to a predetermined level, and executes a predetermined event at a predetermined timing. The oscillator operates for a period where the start-up signal is at the predetermined level if the start-up signal is at the predetermined level during the period the power key of the equipment mounted with the circuit is being pushed.

摘要翻译： 启动电路接收指示启动安装有电路的设备的启动信号，并且在启动信号指示启动时执行预定的顺序。 振荡器产生时钟信号。 序列电路接收启动信号和从振荡器输出的时钟信号，通过在启动信号转换到预定电平时对时钟信号进行计数来测量时间，并在预定定时执行预定事件。 如果启动信号处于预定电平，则在启动信号处于预定电平的期间，振荡器工作在安装有电路的设备的电源键被按下的期间。

公开(公告)号：US20120075544A1

公开(公告)日：2012-03-29

申请号：US13224453

申请日：2011-09-02

申请人： Yoshikazu SASAKI

发明人： Yoshikazu SASAKI

IPC分类号： G02F1/136 ,  H05B37/02

CPC分类号： H05B33/0818 ,  G02F1/133603 ,  G02F2001/133612 ,  H05B33/0827 ,  H05B33/0851 ,  Y02B20/341

摘要： A driving circuit is provided, which is configured to supply a driving voltage and a driving current to an LED string. A first detection resistor is arranged on a path of the LED string. A voltage source outputs a control voltage having a level that corresponds to the target luminance level of the LED string, and a first threshold voltage that is proportional to the control voltage. A controller generates a gate pulse signal having a duty ratio that is adjusted such that the voltage drop across the first detection resistor matches the control voltage. A first driver drives a switching transistor of a DC/DC converter according to the gate pulse signal. When the voltage drop across the first detection resistor exceeds the first threshold voltage, a first comparator stops the switching operation of the switching transistor.

摘要翻译： 提供驱动电路，其被配置为向LED串提供驱动电压和驱动电流。 第一检测电阻器布置在LED串的路径上。 电压源输出具有与LED串的目标亮度级相对应的电平的控制电压和与控制电压成比例的第一阈值电压。 控制器产生具有调节使得第一检测电阻两端的电压降与控制电压匹配的占空比的门脉冲信号。 第一驱动器根据门脉冲信号驱动DC / DC转换器的开关晶体管。 当第一检测电阻两端的电压降超过第一阈值电压时，第一比较器停止开关晶体管的开关操作。

公开(公告)号：US20100231270A1

公开(公告)日：2010-09-16

申请号：US12709859

申请日：2010-02-22

申请人： Yoshikazu SASAKI

发明人： Yoshikazu SASAKI

IPC分类号： H03K3/00 ,  G05F1/00

CPC分类号： H02M1/38 ,  H03K17/167 ,  H03K17/284

摘要： A high-side transistor and a low-side transistor each has gate electrodes configured so as to allow signals to be input and output via a driving contact and a detection contact provided at different positions. When a control signal is at a first level and a signal output from the detection contact on the low-side transistor side is at a low level, the high-side driver applies a low-level signal to the driving contact on the high-side transistor side. When the control signal is at a second level and a signal output from the detection contact on the high-side transistor side is at a high level, the low-side driver applies a high-level signal to the driving contact on the low-side transistor side.

摘要翻译： 高侧晶体管和低侧晶体管的每一个都具有栅极电极，其配置为允许通过驱动触点和设置在不同位置的检测触点输入和输出信号。 当控制信号处于第一电平并且从低侧晶体管侧的检测接点输出的信号处于低电平时，高侧驱动器向高侧驱动接点施加低电平信号 晶体管侧。 当控制信号处于第二电平并且从高侧晶体管侧的检测接点输出的信号处于高电平时，低侧驱动器向低侧的驱动接点施加高电平信号 晶体管侧。

公开(公告)号：US20090060492A1

公开(公告)日：2009-03-05

申请号：US12198585

申请日：2008-08-26

申请人： Yoshikazu SASAKI

发明人： Yoshikazu SASAKI

IPC分类号： G03B17/55

CPC分类号： G03B17/55

摘要： In a digital camera implementing the present invention, a metal tripod seat is arranged on a cabinet, a circuit part that generates heat is accommodated in the cabinet, the circuit part is connected with the tripod seat in a heat conducting manner, and a cover strip made of resin extending from the cabinet covers the tripod seat. The tripod seat is arranged at one end of the cabinet, and the outer surface of the cabinet has a projection formed at a site facing the circuit part, and forms a heat radiating space allowing flow of heat to the other end of the cabinet with the circuit part.

摘要翻译： 在实现本发明的数字照相机中，金属三脚架座被布置在机柜上，产生热量的电路部分容纳在机柜中，电路部分以三通架座与导热方式连接，盖板 从机柜延伸的树脂制成，覆盖三脚架座。 三脚架座设置在机柜的一端，机壳的外表面具有形成在面向电路部分的位置处的突出部，并且形成散热空间，其允许热量流向柜体的另一端 电路部分。