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    • 6. 发明授权
    • Drive circuit for brushless DC motors
    • 无刷直流电机驱动电路
    • US4710684A
    • 1987-12-01
    • US660503
    • 1984-10-12
    • Masaya OkitaMasahiro SawadaTadashi Ota
    • Masaya OkitaMasahiro SawadaTadashi Ota
    • H02P6/22H02P6/08H02P6/12H02P6/02
    • H02P6/085H02P6/12
    • A drive circuit for a brushless DC motor capable of generating a torque in the acceleration and deceleration directions, respectively, and effective when used in a portable device such as an electronic still picture camera. In the drive circuit, a power amplifier having an output stage composed of a pair of complementarily connected tansistors is connected to each end of each of the stator coils. Thus, the drive circuit controls the input potentials of the power amplifiers so as to produce a potential difference across the terminals of each of the stator coils and thereby control the magnitude and direction of current flow through the stator coils. Also, all the transistors of the power amplifier output stages are cut off to prevent the flow of current through the stator coils.
    • 一种用于无刷直流电动机的驱动电路,其能够分别在加速和减速方向产生转矩,并且在用于诸如电子静态照相机的便携式装置中时有效。 在驱动电路中,具有由一对互补连接的耐电阻器构成的输出级的功率放大器连接到每个定子线圈的每个端部。 因此,驱动电路控制功率放大器的输入电位,从而在每个定子线圈的端子之间产生电位差,从而控制通过定子线圈的电流的大小和方向。 此外,功率放大器输出级的所有晶体管被切断以防止通过定子线圈的电流流动。
    • 7. 发明授权
    • Driving circuit for liquid crystal electro-optical device
    • 液晶电光器件驱动电路
    • US4560982A
    • 1985-12-24
    • US403753
    • 1982-07-30
    • Tomio SoneharaMasami MurataTadashi Ota
    • Tomio SoneharaMasami MurataTadashi Ota
    • G02F1/133G09G3/36
    • G09G3/367
    • A liquid crystal display device having non-linear characteristics provides uniform quality in a matrix display. In driving rows and columns of picture elements the duty ratio is substantially increased by shortening the time in which the picture element is selected and charged for lighting. Charging time is less than the half frame period divided by the number of columns to be driven in the half frame, and more rows of elements can be driven in the half frame period. The portion of time actually used for charging is designated as a fine scanning period. By modulating the voltage levels across the liquid crystal layer during fine scanning periods when the crystal element is not selected, effective voltage across the picture elements is maintained with little variation regardless of the number of picture elements driven on the same signal line. A gray scale display can be provided.
    • 具有非线性特性的液晶显示装置在矩阵显示中提供均匀的质量。 在驱动像素的行和列时,通过缩短图像元素被选择并充电以供点亮的时间,占空比显着增加。 充电时间小于半帧周期除以半帧中要驱动的列数,并且可以在半帧周期内驱动更多行元素。 实际用于充电的时间部分被指定为精细的扫描周期。 通过在没有选择晶体元件的精细扫描周期期间调制跨越液晶层的电压电平,与在同一信号线上驱动的像素的数量无关,整个像素上的有效电压保持很小的变化。 可以提供灰度显示。
    • 10. 发明授权
    • Liquid crystal display matrix including a non-linear device
    • 液晶显示矩阵包括非线性装置
    • US4523811A
    • 1985-06-18
    • US339526
    • 1982-01-15
    • Tadashi Ota
    • Tadashi Ota
    • G02F1/1362G02F1/1365H01L45/00G02F1/13H01C7/10H01C7/13
    • G02F1/1365H01L45/00G02F1/13624
    • An active matrix liquid crystal display device wherein individual display elements are controlled by non-linear devices and methods of fabricating the display devices are provided. The non-linear devices are metal-insulator-metal structures (MIM). Two MIM elements are coupled in parallel to each other and connected to each display element in series. The MIM element includes a metallic thin film of Ta or nitrogen doped Ta and an oxide film formed by anodizing the metallic thin film and a second metallic thin film. The liquid crystal display matrix is formed by depositing a lower metallic thin film on a transparent substrate, selectively removing the first film, anodizing the surface of the first metallic thin film, depositing a pattern of an upper metallic thin film and selectively removing both the lower metallic thin film and the anodized oxide film at the regions other than where the MIM elements are being formed. The upper metallic thin film is selectively patterned to form an electrode of a display element. The two substrates are then bonded together spaced apart and a liquid crystal material is encapsulated therebetween and polarizers are disposed on the outer surfaces of the substrates for forming the matrix display.
    • 提供了一种有源矩阵液晶显示装置,其中各个显示元件由非线性装置控制,并且提供了制造显示装置的方法。 非线性器件是金属 - 绝缘体 - 金属结构(MIM)。 两个MIM元件彼此并联连接并串联连接到每个显示元件。 MIM元件包括Ta或氮掺杂Ta的金属薄膜和通过阳极氧化金属薄膜和第二金属薄膜形成的氧化物膜。 通过在透明基板上沉积下部金属薄膜,选择性地去除第一膜,阳极氧化第一金属薄膜的表面,沉积上部金属薄膜的图案并选择性地去除两个下部金属薄膜,形成液晶显示矩阵 金属薄膜和在形成MIM元件之外的区域处的阳极氧化膜。 上金属薄膜被选择性地图案化以形成显示元件的电极。 然后将这两个基板间隔开并且将液晶材料封装在其间,并且偏振器设置在用于形成矩阵显示器的基板的外表面上。