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    • 34. 发明授权
    • System for generating horizontal synchronizing signal compatible with multi-scan
    • 用于产生与多次扫描兼容的水平同步信号的系统
    • US06597403B1
    • 2003-07-22
    • US09666781
    • 2000-09-21
    • Takatomo NagamineSatoshi MiuraShinji Takahashi
    • Takatomo NagamineSatoshi MiuraShinji Takahashi
    • H04N506
    • H04N5/126H04N5/46H04N7/012
    • There can be solved a problem in which a lock range is narrowed by using an oscillator such as a ceramic having a high Q and a horizontal deflection frequency generating system compatible with all horizontal deflection frequencies of a variety of television systems cannot be formed without difficulty. This system includes a frequency-fixed oscillator oscillating at a frequency f0 sufficiently higher than a deflection frequency fh in a multi-scan display, a first counter for counting a clock outputted from said oscillator in a descending order, a duration in which an integer n which results from rounding a decimal point of a value obtained by a division of f0 fh is divided by an integer m smaller than n and said first counter counts a value k thus obtained k times is set to one cycle and a duration in which a second counter for counting a value m times repeats the counting m cycles is set to one period and thereby generating a deflection frequency fh.
    • 可以通过使用诸如具有高Q的陶瓷的振荡器来缩小锁定范围的问题,并且不能难以形成与各种电视系统的所有水平偏转频率兼容的水平偏转频率发生系统的问题。 该系统包括在多扫描显示器中以比f0高的频率f0振荡的频率固定振荡器,用于以降序对从所述振荡器输出的时钟进行计数的第一计数器,其中整数n 将通过f0 fh的除法获得的值的小数点舍入得到的结果被除以小于n的整数m,并且将由此获得的k次的所述第一计数器计数值设置为一个周期,并且其中第二个 用于计数m次的计数器重复计数,m个周期被设置为一个周期,从而产生偏转频率fh。