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    • 2. 发明授权
    • Display processing apparatus
    • 显示处理装置
    • US4630039A
    • 1986-12-16
    • US420676
    • 1982-09-21
    • Yasuhei Shimada
    • Yasuhei Shimada
    • G09G5/32G06T3/40G06T11/00G09G5/24G09G5/26G09G1/00
    • G09G5/26
    • A display processing apparatus which can simply and easily control the size and display screen location of character patterns. The invention is comprised of a memory for storing character data of a predetermined size, an addressing circuit for reading out predetermined character data from the memory, and a transfer circuit for transferring the read character to a display circuit. The addressing circuit includes a counter, an arithmetic circuit for calculating A=MX+B, where X is the counter output value, M is a multiplication factor, B is a predetermined number and A is an address to be provided to the memory for reading out character data. An output shift register passes the memory output to the display circuitry only when the counter value is within predetermined limits, and a control circuit controls the values of the limits as well as M and B.
    • 一种显示处理装置,其可以简单且容易地控制字符图案的尺寸和显示屏幕位置。 本发明包括用于存储预定大小的字符数据的存储器,用于从存储器读出预定字符数据的寻址电路,以及用于将读取的字符传送到显示电路的传送电路。 寻址电路包括计数器,用于计算A = MX + B的算术电路,其中X是计数器输出值,M是倍增因子,B是预定数量,A是要提供给读取存储器的地址 输出字符数据。 输出移位寄存器只有当计数器值在预定限制内时才将存储器输出传递给显示电路,控制电路控制极限值以及M和B。
    • 4. 发明授权
    • Actuating circuit of piezoelectric transformer and actuating method
thereof
    • 压电变压器的驱动电路及其致动方法
    • US5866969A
    • 1999-02-02
    • US956795
    • 1997-10-23
    • Yasuhei ShimadaNobuaki Honbo
    • Yasuhei ShimadaNobuaki Honbo
    • H01L41/107H01L41/04H02M3/24H02M7/48H02M7/5387H01L41/08
    • H01L41/044H02M7/53871
    • An actuating circuit of a piezoelectric transformer which is small in thickness and size and has a wide input voltage range is developed. In the actuating circuit of the piezoelectric transformer, when a sine wave outputted from a AGC circuit is input to a delta-sigma modulator, the sine wave switches output driver and switches a second output driver through an invertor with a 1-bit quantized bit signal so as to generate a pulse signal having an amplitude of power supply voltage Vdd from the GND potential. Actuating waves output from the output drivers and are applied to 1 piezoelectric transformer extracting resonance frequency of a piezoelectric transformer through a filtering effect provided with an input capacitance of the piezoelectric transformer and coil converting the 1-bit quantized bit signal into a sine wave. Consequently, since the piezoelectric transformer can be operated with the sine wave, the piezoelectric transformer can be actuated efficiently.
    • 开发了厚度和尺寸小,输入电压范围宽的压电变压器的致动电路。 在压电变压器的致动电路中,当从AGC电路输出的正弦波输入到Δ-Σ调制器时,正弦波切换输出驱动器,并通过具有1位量化比特信号的反相器切换第二输出驱动器 从而产生具有来自GND电位的电源电压Vdd幅度的脉冲信号。 从输出驱动器输出的激励波,并通过提供压电变压器的输入电容的滤波效果和将1位量化比特信号转换为正弦波的线圈,将其应用于压电变压器的1个压电变压器提取谐振频率。 因此,由于压电变压器可以用正弦波操作,所以可以有效地驱动压电变压器。
    • 6. 发明授权
    • Inverter and method for driving a plurality of cold cathode tubes in
parallel
    • 用于平行驱动多个冷阴极管的逆变器和方法
    • US6075325A
    • 2000-06-13
    • US34311
    • 1998-03-04
    • Makoto KounoShuuji YamaguchiYasuhei Shimada
    • Makoto KounoShuuji YamaguchiYasuhei Shimada
    • H05B41/24H02M3/24H02M7/48H02M11/00H05B41/282H05B41/392H05B37/02
    • H05B41/3925H05B41/282H05B41/2822
    • A drive circuit for a piezoelectric transformer includes a master block 24 having a drive frequency control circuit for controlling the frequency of a drive voltage for a piezoelectric transformer, at least one slave block 25 receiving an output of the above mentioned drive frequency control circuit and having a drive voltage control circuit for controlling a peak value of a drive voltage for a piezoelectric transformer, a circuit for PWM-modulating the drive voltages applied to the piezoelectric transformers, and driving the drive voltages in the same phase, and a circuit for suppressing a harmonic component of a light adjusting frequency included in the drive voltages for the piezoelectric transformers. With this arrangement, when a plurality of cold cathode tubes are driven by using piezoelectric transformer inverters, it is possible to eliminate the limit in the number of tubes lighted and the inclination of the brightness, and to prevent a flickering and the generation of an audible sound.
    • 用于压电变压器的驱动电路包括具有用于控制压电变压器的驱动电压的频率的驱动频率控制电路的主块24,接收上述驱动频率控制电路的输出的至少一个从块25, 用于控制压电变压器的驱动电压的峰值的驱动电压控制电路,用于对施加到压电变压器的驱动电压进行PWM调制的PWM电路以及驱动相同相位的驱动电压的电路,以及用于抑制 包含在压电变压器的驱动电压中的调光频率的谐波分量。 通过这种布置,当使用压电变压器逆变器驱动多个冷阴极管时,可以消除点亮的管的数量和亮度的倾斜度的限制,并且防止闪烁和产生可听见的 声音。
    • 7. 发明授权
    • Piezoelectric transformer driver
    • 压电变压器驱动器
    • US6028388A
    • 2000-02-22
    • US940993
    • 1997-09-30
    • Yasuhei Shimada
    • Yasuhei Shimada
    • H01L41/107H01L41/04H02M3/24H02M7/48H03B23/00H03L5/00H01L41/08
    • H03L5/00H01L41/044H03B23/00
    • In a steady-state operation, a rectified voltage obtained from an output current Io of a piezoelectric transformer 1 is compared in a comparator 10 with Vref. When the voltage is lower than Vref, a signal Vdown is at an "H" level, and otherwise it is at an "L" level. A switch SW1 or SW2 is thus turned on to charge or discharge a capacitor Cvco. This has an effect of sweeping the oscillation frequency of a VCO 14 downward or upward to increase or reduce the output voltage Vo of the piezoelectric transformer 1 which is driven at the oscillation frequency. When a load 2 is open-circuited, a voltage VR obtained from an output voltage Vo becomes higher than Vmax to set a flip-flop 13 and turn on a switch SW3. The capacitor voltage Vvco is thus reduced to reduce the oscillation frequency of the VCO 14 and reduce the output voltage Vo. When the voltage VR becomes lower than Vmin, the flip-flop 18 is reset by the output of the comparator 16 to turn off the switch SW3.
    • 在稳态操作中,将比较器10中的压电变压器1的输出电流Io获得的整流电压与Vref进行比较。 当电压低于Vref时,信号Vdown处于“H”电平,否则为“L”电平。 因此,开关SW1或SW2被接通以对电容器Cvco进行充电或放电。 这具有向下或向上扫描VCO14的振荡频率以增加或减少以振荡频率驱动的压电变压器1的输出电压Vo的效果。 当负载2断开时,从输出电压Vo获得的电压VR变得高于Vmax以设置触发器13并接通开关SW3。 因此,电容器电压Vvco被减小以降低VCO 14的振荡频率并降低输出电压Vo。 当电压VR变得低于Vmin时,触发器18被比较器16的输出复位,以断开开关SW3。
    • 9. 发明授权
    • Secondary battery unit using electric double layer condenser
    • 二次电池组采用电双层冷凝器
    • US6020719A
    • 2000-02-01
    • US189272
    • 1998-11-06
    • Eitaro NishigakiYasuhei Shimada
    • Eitaro NishigakiYasuhei Shimada
    • H02J7/00H01M10/46H02J7/34H02M3/155
    • H02J7/345
    • A secondary battery unit which can supply constant power for a longer time with a lower input voltage and which is small, light, and suitable for portable use is provided. The secondary battery unit comprises plural inductors having different inductances, to which the first voltage is input; a rectifier inserted between the plural inductors and the output terminal; plural switches respectively connected to the plural inductors, each switch making current according to the first voltage flow through the connected inductor when the switch is operated; a switching controller for selectively operating one of the plural switches according to variation of the first voltage; and a controller for controlling timing of the above switching between the plural switches so as to stabilize a voltage from the output terminal to the predetermined second voltage.
    • 提供了一种二次电池单元,其可以以更低的输入电压提供更长时间的恒定功率,并且其小,轻且适于便携式使用。 二次电池单元包括具有不同电感的多个电感器,第一电压被输入到其中; 插入在多个电感器和输出端子之间的整流器; 分别连接到多个电感器的多个开关,当开关被操作时,每个开关根据通过所连接的电感器的第一电压流动来产生电流; 开关控制器,用于根据第一电压的变化选择性地操作多个开关中的一个; 以及控制器,用于控制多个开关之间的上述切换的定时,以便将来自输出端子的电压稳定到预定的第二电压。