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    • 3. 发明申请
    • LIGHT EMITTING DEVICE CONTROL CIRCUIT DEVICE AND CONTROL METHOD OF THE CONTROL CIRCUIT DEVICE
    • 发光装置控制电路装置及控制电路装置的控制方法
    • US20110248642A1
    • 2011-10-13
    • US13082596
    • 2011-04-08
    • Hidekazu KikuchiAkinobu Sawada
    • Hidekazu KikuchiAkinobu Sawada
    • H05B41/16
    • H05B37/0281H05B33/0824
    • The light emitting device control circuit device 100 in accordance with the disclosure includes a power source V1, a transistor TR1, a light emitting unit EU1, switches S1 to S17, constant current sources CC1 to CC17, and a controller 110. A switching voltage Vs1 is supplied from the controller 110 to turn ON or turn OFF the transistor TR intermittently, a pulse voltage is supplied to a pulse voltage supplying line Y1 connected to a drain terminal D of the transistor TR1. The driving signals SP1 to SP17 are sequentially supplied to the switches S1 to S17 to turn ON or turn OFF them (i.e., time division drive). The light emitting devices A1 to A17 are driven sequentially by a pulse current (i.e., time division drive) when a high voltage is supplied to the pulse voltage supplying line Y1 and when the driving signals SP1 to SP17 are turned ON.
    • 根据本发明的发光器件控制电路装置100包括电源V1,晶体管TR1,发光单元EU1,开关S1至S17,恒流源CC1至CC17以及控制器110.开关电压Vs1 从控制器110供给间歇地导通或截止晶体管TR,向与晶体管TR1的漏极端子D连接的脉冲电压供给线Y1提供脉冲电压。 驱动信号SP1至SP17依次提供给开关S1至S17以导通或关断它们(即时分驱动)。 当向脉冲电压供给线Y1供给高电压时,以及驱动信号SP1〜SP17为ON时,通过脉冲电流(即时分驱动)依次驱动发光元件A1〜A17。
    • 4. 发明授权
    • Analog to digital converter using both analog and digital offset voltages as feedback
    • 使用模拟和数字偏移电压的模数转换器作为反馈
    • US07164375B2
    • 2007-01-16
    • US11157556
    • 2005-06-21
    • Akinobu Sawada
    • Akinobu Sawada
    • H03M3/00
    • H03M1/1019
    • An A/D conversion unit includes an A/D converter, an analog offset canceller connected to the input end of the A/D converter, and a digital offset canceller connected to the output end of the A/D converter. The analog offset canceller performs a coarse adjustment of offset canceling voltage in the first stage of offset cancellation operation to largely cancel out the offset voltage involved in the A/D conversion unit by shifting the range of the input signal. Then the digital offset canceller performs a fine adjustment of offset canceling voltage in the second stage of offset cancellation operation to completely cancel out a residual offset voltage. Through the offset cancellation operation, the linearity error of the A/D converter, linearity error of the D/A converter, and matching error between the A/D and D/A converters are completely cancelled out.
    • A / D转换单元包括A / D转换器,连接到A / D转换器的输入端的模拟偏移消除器和连接到A / D转换器的输出端的数字偏移消除器。 模拟偏移消除器在偏移消除操作的第一阶段中执行偏移消除电压的粗略调整,以通过移位输入信号的范围来大大抵消A / D转换单元中涉及的偏移电压。 然后,数字偏移消除器在偏移消除操作的第二阶段中进行偏移消除电压的微调,以完全抵消残余偏移电压。 通过偏移消除操作,A / D转换器的线性误差,D / A转换器的线性误差以及A / D转换器与D / A转换器之间的匹配误差被完全抵消。
    • 5. 发明授权
    • Light emitter driving device and lighting appliance therewith
    • 发光体驱动装置及照明装置
    • US08922135B2
    • 2014-12-30
    • US13528279
    • 2012-06-20
    • Takeshi SumitaniAkinobu Sawada
    • Takeshi SumitaniAkinobu Sawada
    • G05F1/00H05B37/02H05B39/04H05B41/36H05B33/08H05B37/00H05B39/00H05B41/14
    • H05B33/08H05B33/0815H05B33/0824H05B33/0851H05B37/02Y02B20/347Y02B20/383
    • A light emitter driving device has a decoder portion which monitors a rectified voltage and generates a dimming signal, and a drive current control portion which controls a drive current to a light emitter according to the dimming signal. The decoder portion has a comparator which compares the rectified voltage with a predetermined threshold voltage to generate a comparison signal, a sampling counter which measures high-level and low-level periods of the comparison signal, a duty calculation portion which calculates the duty of the rectified voltage based on the output of the sampling counter, a filter calculation portion which excludes sporadic variation in duty by applying digital filtering to the output of the duty calculation portion, and a dimming signal generation portion which generates the dimming signal based on the output of the filter calculation portion.
    • 光发射器驱动装置具有:监视整流电压并产生调光信号的解码器部分;以及根据调光信号控制到发光体的驱动电流的驱动电流控制部。 解码器部分具有将整流电压与预定阈值电压进行比较以产生比较信号的比较器,测量比较信号的高电平和低电平时段的采样计数器,计算占空比的占空比 基于采样计数器的输出的整流电压,通过对占空比计算部分的输出应用数字滤波来排除占空比的零星变化的滤波器计算部分,以及基于输出的产生调光信号的调光信号产生部分 滤波器计算部分。
    • 8. 发明申请
    • A/D conversion unit and communications apparatus using the same
    • A / D转换单元和使用它的通信设备
    • US20060012504A1
    • 2006-01-19
    • US11157556
    • 2005-06-21
    • Akinobu Sawada
    • Akinobu Sawada
    • H03M1/12
    • H03M1/1019
    • An A/D conversion unit includes an A/D converter, an analog offset canceller connected to the input end of the A/D converter, and a digital offset canceller connected to the output end of the A/D converter. The analog offset canceller performs a coarse adjustment of offset canceling voltage in the first stage of offset cancellation operation to largely cancel out the offset voltage involved in the A/D conversion unit by shifting the range of the input signal. Then the digital offset canceller performs a fine adjustment of offset canceling voltage in the second stage of offset cancellation operation to completely cancel out a residual offset voltage. Through the offset cancellation operation, the linearity error of the A/D converter, linearity error of the D/A converter, and matching error between the A/D and D/A converters are completely cancelled out.
    • A / D转换单元包括A / D转换器,连接到A / D转换器的输入端的模拟偏移消除器和连接到A / D转换器的输出端的数字偏移消除器。 模拟偏移消除器在偏移消除操作的第一阶段中执行偏移消除电压的粗略调整,以通过移位输入信号的范围来大大抵消A / D转换单元中涉及的偏移电压。 然后,数字偏移消除器在偏移消除操作的第二阶段中进行偏移消除电压的微调,以完全抵消残余偏移电压。 通过偏移消除操作,A / D转换器的线性误差,D / A转换器的线性误差和A / D转换器与D / A转换器之间的匹配误差被完全抵消。