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    • 2. 发明授权
    • D/A conversion circuit and liquid crystal display device
    • D / A转换电路和液晶显示装置
    • US06549196B1
    • 2003-04-15
    • US09401847
    • 1999-09-22
    • Takashi TaguchiTakeshi ShimaTetsuro Itakura
    • Takashi TaguchiTakeshi ShimaTetsuro Itakura
    • B09G500
    • H03M1/0872G09G3/3688G09G2310/027H03M1/765
    • A D/A conversion circuit which can perform D/A conversion at high speed and with high precision is disclosed. The D/A conversion circuit comprises an analog reference power supply, an output buffer, a multiplexer, a pre-buffer, and a current changeover switch. The pre-buffer operates with a power supply voltage different from that of the analog reference power supply, and outputs a voltage substantially equal to an output voltage of the analog reference power supply. For a predetermined period after logic of digital data changes, the output voltage of the pre-buffer is supplied to the output buffer, and an input parasitic capacitor of the output buffer is charged/discharged. After the predetermined period elapses, the output voltage of the analog reference power supply is supplied to the output buffer. Therefore, a charging/discharging current of the input parasitic capacitor does not flow through the analog reference power supply, and fluctuation of the output voltage of the analog reference power supply can be suppressed.
    • 公开了一种可以高速,高精度地执行D / A转换的D / A转换电路。 D / A转换电路包括模拟参考电源,输出缓冲器,多路复用器,预缓冲器和电流切换开关。 预缓冲器以与模拟基准电源不同的电源电压工作,并输出基本上等于模拟基准电源的输出电压的电压。 在数字数据的逻辑变化之后的预定时间内,预缓冲器的输出电压被提供给输出缓冲器,并且输出缓冲器的输入寄生电容器被充电/放电。 经过预定时间后,模拟基准电源的输出电压被提供给输出缓冲器。 因此,输入的寄生电容器的充电/放电电流不会流过模拟基准电源,并且可以抑制模拟基准电源的输出电压的波动。
    • 3. 发明授权
    • Sample-and-hold circuit device
    • 采样保持电路装置
    • US5376841A
    • 1994-12-27
    • US143127
    • 1993-10-29
    • Tetsuro ItakuraTakeshi Shima
    • Tetsuro ItakuraTakeshi Shima
    • G09G3/36G11C27/02H03K5/153H03K5/24
    • G11C27/026G11C27/024G09G2310/0289G09G3/3688
    • A sample-and-hold circuit device which includes a plurality of sample-and-hold circuits and a comparator/amplifier for comparing a reference potential with an output signal which is output from the plurality of sample-and-hold circuits so as to amplify a difference between these two signals. An output of the comparator/amplifier is fed back to respective control terminals of the different sample-and-hold circuits, each being provided as a level control signal. In another embodiment, a plurality of adding circuits are provided for adding the outputs of the plurality of sample-and-hold circuits and then comparing this value with an arbitrary reference potential, whereby a difference between the sum value and the arbitrary reference potential is amplified and fed back to the control terminals of the sample-and-hold circuits.
    • 一种采样保持电路装置,包括多个采样保持电路和用于将参考电位与从多个采样和保持电路输出的输出信号进行比较的比较器/放大器,以便放大 这两个信号之间的区别。 比较器/放大器的输出反馈到不同取样和保持电路的各个控制端,每个控制端被提供为电平控制信号。 在另一个实施例中,提供多个加法电路用于将多个采样和保持电路的输出相加,然后将该值与任意的参考电位进行比较,从而放大和值和任意参考电位之间的差值 并反馈到采样保持电路的控制端子。
    • 8. 发明授权
    • Image processing device that performs tracking control
    • 执行跟踪控制的图像处理设备
    • US09165374B2
    • 2015-10-20
    • US13550970
    • 2012-07-17
    • Mirai HiguchiTakehito OgataTakeshi Shima
    • Mirai HiguchiTakehito OgataTakeshi Shima
    • H04N7/18G06T7/20G06K9/00G06K9/32
    • G06T7/204G06K9/00798G06K9/00805G06K9/3241G06T7/248G06T2207/30252
    • An image processing device which performs a tracking control with respect to a moving object which is travelling forward, based on the controlled variable of the own vehicle includes, an image processing unit which specifies an area of a moving object from an input image, sets the specified area of the moving object as a reference image area after starting tracking control, and sets an area of the moving object after a predetermined time as a comparison image area; a comparison unit which compares the set reference image area and the comparison image area with each other, and calculates travelling information relating to the moving object; and a controlled variable calculation unit which calculates a controlled variable of the own vehicle from travelling information which is calculated in the comparison unit.
    • 基于本车辆的控制变量对前进的运动物体进行跟踪控制的图像处理装置包括:图像处理单元,其从输入图像指定移动物体的区域, 在开始跟踪控制之后,移动物体的指定区域作为参考图像区域,并且将预定时间之后的移动物体的面积设置为比较图像区域; 比较单元,其将设定的参考图像区域和比较图像区域进行比较,并且计算与移动物体有关的行驶信息; 以及受控变量计算单元,其根据在比较单元中计算出的行驶信息来计算本车辆的受控变量。