公开(公告)号：US5357290A

公开(公告)日：1994-10-18

申请号：US946637

申请日：1992-09-18

申请人： Shigenobu Horibe

发明人： Shigenobu Horibe

IPC分类号： G02F1/133 ,  G09G3/36 ,  H04N3/12 ,  H04N5/46 ,  H04N5/66

CPC分类号： H04N3/127 ,  G09G3/3648 ,  G09G3/3677 ,  G09G3/3688 ,  H04N5/46 ,  G09G2310/0232 ,  G09G2340/04 ,  G09G2360/02

摘要： A liquid crystal displaying panel is formed of a number of pixels in the horizontal and vertical directions based on a PAL system of many horizontal scanning lines. A polarity reversing circuit reverses the polarity of an input video signal at a predetermined period and a signal feeding circuit samples the video signal reversed in the polarity and holds it. The signal feeding circuit feeds the output to the respective data lines of the liquid crystal panel and can feed the output corresponding to the data lines of an NTSC video displaying region by a switch to the data lines corresponding to the blank part other than the NTSC system video displaying region. A scanning circuit feeds a driving signal to the respective gate lines of the liquid crystal displaying panel and can feed the output corresponding to the gate lines of the NTSC video displaying region by a switch so that, when the NTSC system is selected, an intrinsic NTSC video will be displayed in the displaying region and the NTSC video will be displayed also in the blank part. That is to say, by alternately driving the liquid crystal of all the pixels, a video of the same picture quality can be displayed in the PAL system and NTSC system without deteriorating the liquid crystal.

摘要翻译： 基于许多水平扫描线的PAL系统，在水平和垂直方向上形成多个像素的液晶显示面板。 极性反转电路以预定周期反转输入视频信号的极性，并且信号馈送电路对极性反转的视频信号进行采样并保持它。 信号馈送电路将输出馈送到液晶面板的各个数据线，并且可以通过切换将与NTSC视频显示区域的数据线相对应的输出馈送到与NTSC系统以外的空白部分相对应的数据线 视频显示区域。 扫描电路将驱动信号馈送到液晶显示面板的各个栅极线，并且可以通过开关馈送对应于NTSC视频显示区域的栅极线的输出，使得当选择NTSC系统时，本征NTSC 视频将显示在显示区域，NTSC视频也将显示在空白部分。 也就是说，通过交替地驱动所有像素的液晶，可以在PAL系统和NTSC系统中显示相同图像质量的视频，而不会使液晶劣化。