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    • 42. 发明授权
    • LED drive circuit
    • LED驱动电路
    • US08115422B2
    • 2012-02-14
    • US12417460
    • 2009-04-02
    • Osamu Sasaki
    • Osamu Sasaki
    • H05B37/02
    • H05B33/0812
    • Provided is an LED drive circuit capable of using a switching regulator IC having low breakdown voltage even when a power supply voltage is high. The LED drive circuit includes a voltage clamp circuit for clamping the power supply voltage to an operating voltage of the switching regulator IC, converts an output voltage of a current detecting circuit for detecting a current flowing through an LED into the operating voltage of the switching regulator IC, and outputs the operating voltage.
    • 提供了即使当电源电压高时也能够使用具有低击穿电压的开关调节器IC的LED驱动电路。 LED驱动电路包括用于将电源电压钳位到开关调节器IC的工作电压的电压钳位电路,将用于检测流过LED的电流的电流检测电路的输出电压转换为开关稳压器的工作电压 IC,并输出工作电压。
    • 47. 发明授权
    • Anisotropic permanent magnet
    • 各向异性永磁体
    • US06304162B1
    • 2001-10-16
    • US09597615
    • 2000-06-20
    • Satoshi NakatsukaOsamu SasakiMasaharu Abe
    • Satoshi NakatsukaOsamu SasakiMasaharu Abe
    • H01F702
    • H01F41/028H01F7/02
    • An anisotropic permanent magnet with an improved surface magnetic field peak value is provided, which has at least one active surface and is oriented and magnetized simultaneously in such a manner that axes of easy magnetization of magnetic powder constituting the permanent magnet pass from the active surface through an interior of the magnet to return to the active surface, wherein a standard magnetic pole and a background opposite magnetic pole are present as an island and a sea, and the ratio of an area of the standard magnetic pole to an area of the background opposite magnetic pole is 9 to 90:91 to 10. Also, a permanent magnet for attraction with an improved attraction force is provided, wherein a total area &Sgr;S of an S pole surface and a total area &Sgr;N of an N pole surface satisfy a relationship: 0.5×&Sgr;S≦&Sgr;N≦2.0×&Sgr;S or 0. 5×&Sgr;N≦&Sgr;S≦2.0×&Sgr;N.
    • 提供具有改善的表面磁场峰值的各向异性永久磁体,其具有至少一个有效表面并且以这样的方式同时取向和磁化,使得构成永磁体的磁粉的易磁化轴从活性表面通过 磁体的内部返回到有源表面,其中标准磁极和背景相反的磁极作为岛和海存在,并且标准磁极的面积与背景区域的比率相反 磁极为9〜90:91〜10。另外,提供吸引力提高的永久磁铁,其中S极面的总面积SIGMAS和N极面的总面积SIGMAN满足关系: 0.5xSIGMAS <= SIGMAN <= 2.0xSIGMAS或0. 5xSIGMAN <= SIGMAS <= 2.0xSIGMAN。
    • 48. 发明授权
    • Voltage output circuit and image display device
    • 电压输出电路和图像显示装置
    • US6067066A
    • 2000-05-23
    • US712644
    • 1996-09-11
    • Yasushi KubotaOsamu SasakiHiroshi Yoneda
    • Yasushi KubotaOsamu SasakiHiroshi Yoneda
    • G09G3/20G09G3/36
    • G09G3/3688G09G3/2011G09G3/3655G09G2310/0259G09G2310/027G09G2310/0297
    • A voltage output circuit has decoders, a selecting circuit, a logical circuit and an output circuit in order to select one of plural gradation power source lines for a prescribed period based upon k bits and m bits of an n-bit digital signal. The k bits of the digital signal are converting into 2.sup.k decoded signals by one decoder, and another m bits are converted into 2.sup.m decoded signals by the other decoder. The selecting circuit generates a signal for selecting one of periods which were obtained by dividing one horizontal scanning period into 2.sup.k based upon k-numbered timing signals by using the 2.sup.k decoded signals. The logical circuit generates 2.sup.n signals composed of combinations of the signals from the selecting circuit and the 2.sup.m decoded signals. Moreover, one of the 2.sup.m gradation power source lines is selected by an output switch by using the signal from the logical circuit. As a result, in an image display device using a digital signal as an input video signal, a number of gradation power source lines is reduced and the arrangement of driving circuits is simplified without deteriorating display quality. As a result, a cost of the image display device can be lowered.
    • 电压输出电路具有解码器,选择电路,逻辑电路和输出电路,以便基于n比特数字信号的k比特和m比特来选择多个灰度级电源线中的一个规定时段。 数字信号的k位由一个解码器转换成2k个解码信号,另一个m位由另一个解码器转换成2m个解码信号。 选择电路通过使用2k个解码信号,生成用于选择通过基于k个编号的定时信号将一个水平扫描周期分成2k而获得的周期之一的信号。 逻辑电路产生由来自选择电路的信号和2m个解码信号的组合组成的2n个信号。 此外,通过使用来自逻辑电路的信号,由输出开关选择2m级的电源线之一。 结果,在使用数字信号作为输入视频信号的图像显示装置中,减少了多个灰度电源线,并且简化了驱动电路的布置,而不会降低显示质量。 结果,可以降低图像显示装置的成本。