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    • 8. 发明授权
    • Method and apparatus for driving liquid crystal display panel
    • 驱动液晶显示面板的方法和装置
    • US06753841B2
    • 2004-06-22
    • US09250575
    • 1999-02-16
    • Tsutomu KaiYoshiya Kaneko
    • Tsutomu KaiYoshiya Kaneko
    • G09G336
    • G09G5/005G09G3/3648G09G3/3677G09G3/3688G09G5/006G09G2340/0414
    • An LCD apparatus has a control circuit 40 which makes a timing of the rear edges of scanning pulses provided to predetermined scanning lines coincide with the time when the display potential is renewed, wherein each of the predetermined scanning lines corresponds to an addition of a picture line to a picture or a reduction from two picture lines to one picture line on a picture in order to compensate for a difference between the number of scanning lines of the LCD and the number of lines of the picture to be displayed. In the control circuit, a circuit detects cycle times of the vertical and horizontal sync pulses, an MPU determines the reference value REF on the basis of the detected value and count CH of the horizontal sync pulse *HS from a counter, and a circuit generates a signal AE which makes the time when the pulse count CD of pixel clock CLKD from the counter becomes equal to the REF that coincides with the timing of the rear edge of scanning pulse.
    • LCD装置具有控制电路40,其使提供给预定扫描线的扫描脉冲的后沿的定时与更新显示电位的时间一致,其中每个预定扫描线对应于图像行的相加 以图像或从图像的两个图像行减少到图像上的一个图像行,以便补偿LCD的扫描行数与要显示的图像的行数之间的差异。 在控制电路中,电路检测垂直和水平同步脉冲的周期时间,MPU根据来自计数器的水平同步脉冲* HS的检测值和计数CH确定参考值REF,并且电路产生 使得来自计数器的像素时钟CLKD的脉冲计数CD的时间等于与扫描脉冲的后沿的定时一致的REF的时间的信号AE。
    • 9. 发明授权
    • Optical information recording/reproducing device
    • 光信息记录/再现装置
    • US06434096B1
    • 2002-08-13
    • US09674023
    • 2000-10-24
    • Noritaka AkagiTsutomu KaiShuichi YoshidaKiyoshi MasakiTeruyuki NakaYasuo KashiwagiIsao Takemoto
    • Noritaka AkagiTsutomu KaiShuichi YoshidaKiyoshi MasakiTeruyuki NakaYasuo KashiwagiIsao Takemoto
    • G11B700
    • G11B7/0901G11B7/094G11B7/0941G11B7/0956
    • In order to correct the change in the offset and amplitude of a tracking error signal because of the change in the position of an object lens from the center of an optical pickup, the offset amount and amplitude value of the tracking error signal with respect to the displacement amount of the object lens from the center of the optical pickup are checked beforehand, and the displacement amount of the object lens is estimated on the basis of a tracking correction signal by using an object lens displacement observer. An offset detection section and an amplitude detection section detect the offset amount and amplitude value of the tracking error signal respectively, and the tracking error signal is corrected by an offset correction circuit and an amplitude correction circuit on the basis of the offset amount and amplitude value having been checked beforehand so that the offset amount and the amplitude value of the tracking error signal become identical to those obtained when the displacement amount of the object lens is zero. In addition, the offset of the tilt error signal depending on the movement direction of the optical pickup 2 is detected and recorded beforehand, and the tilt error signal is corrected on the basis of the above-mentioned recorded offset when a rotation direction detection section detects the moving direction of the optical pickup.
    • 为了校正由于物镜的位置从光学拾取器的中心的变化引起的跟踪误差信号的偏移和振幅的变化,跟踪误差信号的偏移量和振幅值相对于 预先检查物镜从光学拾取器的中心的位移量,并且通过使用物镜位移观察器基于跟踪校正信号来估计物镜的位移量。 偏移检测部分和振幅检测部分分别检测跟踪误差信号的偏移量和振幅值,并且基于偏移量和振幅值由偏移校正电路和振幅校正电路校正跟踪误差信号 预先检查,使得跟踪误差信号的偏移量和振幅值变得与当物镜的位移量为零时获得的偏移量和振幅值相同。 此外,预先检测并记录与光学拾取器2的移动方向相对应的倾斜误差信号的偏移,并且当旋转方向检测部检测到时,基于上述记录偏移来校正倾斜误差信号 光学拾取器的移动方向。