公开(公告)号：US5955848A

公开(公告)日：1999-09-21

申请号：US975597

申请日：1997-11-21

Applicant: Kenji Arima ,  Takeo Takemura

Inventor： Kenji Arima ,  Takeo Takemura

IPC: H04N3/23 ,  H04N3/233

CPC classification number: H04N3/233

Abstract: A horizontal S-shaped correction signal circuit having a correction condenser disposed in a cathode ray tube (CRT) horizontal deflection circuit such as in a television receiver, a display monitor, etc. In particular, a horizontal S-shaped correction signal circuit which is capable of obtaining an accurate correction effect and a desired adjustment. The total capacitance of the correction condenser C.sub.S for a horizontal deflection circuit is variable by selectively connecting in parallel therewith correction condensers C.sub.S1 and C.sub.S2 by switches SW.sub.1 and SW.sub.2 during the scanning interval. Therefore, the correction characteristic is improved. Namely, it is possible to obtain a highly accurate S-shaped correction signal. In addition, it is possible to independently control the width of the front portion and rear portion of the horizontal scanning interval by controlling externally inputted direct control current signals DA-C.sub.TL1 and DA-C.sub.TL2. Furthermore, it is possible to vary the S-shaped correction signal width depending on the vertical scan position on the screen.

Abstract translation: 具有设置在诸如电视接收机，显示监视器等的阴极射线管（CRT）水平偏转电路中的校正电容器的水平S形校正信号电路。特别地，水平S形校正信号电路是 能够获得精确的校正效果和期望的调整。 用于水平偏转电路的校正电容器CS的总电容通过在扫描间隔期间通过开关SW1和SW2选择性地与校正电容器CS1和CS2并联连接而变化。 因此，改善了校正特性。 也就是说，可以获得高精度的S形校正信号。 此外，通过控制外部输入的直接控制电流信号DA-CTL1和DA-CTL2，可以独立地控制水平扫描间隔的前部和后部的宽度。 此外，可以根据屏幕上的垂直扫描位置改变S形校正信号宽度。