Invention Grant
US06421309B1 Apparatus and method for detecting maximum mark lengths 有权
用于检测最大标记长度的装置和方法

  • Patent Title: Apparatus and method for detecting maximum mark lengths
  • Patent Title (中): 用于检测最大标记长度的装置和方法
  • Application No.: US09388751
    Application Date: 1999-09-02
  • Publication No.: US06421309B1
    Publication Date: 2002-07-16
  • Inventor: Toshio KanaiTeruhiko Ushio
  • Applicant: Toshio KanaiTeruhiko Ushio
  • Priority: JP10-253936 19980908
  • Main IPC: G11B700
  • IPC: G11B700
Apparatus and method for detecting maximum mark lengths
Abstract:
A maximum mark length detector comprising a total value register for storing a total value Lsum of measured mark lengths; a measured value register for storing a measured value of a mark length; an arithmetic unit for computing the sum Lp of a current measured value Lk and a previously measured value PLk stored in the measured value register and subtracting a maximum value Lmax from the total value Lsum when the total value Lsum reaches the measured maximum value Lmax; a counter to count the number of times the subtraction is performed; and a comparator for completing the detection when a count value C of the counter reaches a predetermined value.
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