公开(公告)号：US5856729A

公开(公告)日：1999-01-05

申请号：US748976

申请日：1996-11-14

申请人： Cheng-Di Tsai

发明人： Cheng-Di Tsai

IPC分类号： G09G1/00 ,  H01J29/70 ,  H04N3/223 ,  H04N3/233 ,  G09G1/04

CPC分类号： G09G1/00 ,  H01J29/701 ,  H04N3/223 ,  H04N3/233

摘要： The present invention includes a DC signal generating circuit for generating a DC signal and a ramp signal generating circuit for generating a periodic ramp signal. A synthesizing circuit is then used to combine the DC signal and the ramp signal to generate a synthesized signal, where the DC level of the synthesized signal is determined by the DC level of the DC signal. A driving circuit is used to amplify the power of the synthesized signal. A rotate coil surrounding the neck of a cathode-ray tube is responsive to the amplified synthesized signal, and therefore generates a magnetic force to turn electron beam in the cathode-ray tube, thereby compensating the trapezoidal distortion on the bottom and the top edges of a screen display.

摘要翻译： 本发明包括用于产生DC信号的DC信号发生电路和用于产生周期性斜坡信号的斜坡信号产生电路。 然后使用合成电路来组合DC信号和斜坡信号以产生合成信号，其中合成信号的DC电平由DC信号的DC电平确定。 驱动电路用于放大合成信号的功率。 围绕阴极射线管的颈部的旋转线圈响应于放大的合成信号，因此产生磁力以在阴极射线管中转动电子束，由此补偿底部和顶部边缘上的梯形失真 屏幕显示。