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公开(公告)号：EP0766457A2
公开(公告)日：1997-04-02
申请号：EP96306557.8
申请日：1996-09-10
发明人： Yamagishi, Nobuyoshi
IPC分类号： H04N3/27
摘要： A television receiver is disclosed which is designed to display two types of input picture signals, for example, an NTSC signal and a VGA signal on at least two display areas of one image screen simultaneously. The television receiver includes an auxiliary coil and a switching circuit. The auxiliary coil is operable in first and second operation modes. The first operation mode is such that an electron beam is scanned in sequence along the scanning lines to reproduce the VGA signal having a horizontal scanning frequency of substantially twice that of the NTSC input signal, while the second operation mode is such that the scanning line intervals are controlled so as to scan the electron beam two times along the same scanning line to reproduce the consecutive two of line signals of the frequency-converted NTSC signal which are formed by the same portion of the NTSC input signal. The switching circuit is responsive to an area signal indicative of the display area of at least one of the frequency-converted NTSC signal and the VGA signal to switch between the first and second operation modes of the auxiliary coil for displaying high-quality images on the different display areas of the image screen.
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公开(公告)号：EP0766457A3
公开(公告)日：1999-03-17
申请号：EP96306557.8
申请日：1996-09-10
发明人： Yamagishi, Nobuyoshi
IPC分类号： H04N3/27
摘要： A television receiver is disclosed which is designed to display two types of input picture signals, for example, an NTSC signal and a VGA signal on at least two display areas of one image screen simultaneously. The television receiver includes an auxiliary coil and a switching circuit. The auxiliary coil is operable in first and second operation modes. The first operation mode is such that an electron beam is scanned in sequence along the scanning lines to reproduce the VGA signal having a horizontal scanning frequency of substantially twice that of the NTSC input signal, while the second operation mode is such that the scanning line intervals are controlled so as to scan the electron beam two times along the same scanning line to reproduce the consecutive two of line signals of the frequency-converted NTSC signal which are formed by the same portion of the NTSC input signal. The switching circuit is responsive to an area signal indicative of the display area of at least one of the frequency-converted NTSC signal and the VGA signal to switch between the first and second operation modes of the auxiliary coil for displaying high-quality images on the different display areas of the image screen.
摘要翻译： 公开了一种电视接收机，其被设计为在一个图像屏幕的至少两个显示区域上同时显示两种类型的输入图像信号，例如NTSC信号和VGA信号。 电视接收机包括辅助线圈和开关电路。 辅助线圈可在第一和第二操作模式下操作。 第一操作模式是沿着扫描线依次扫描电子束，以再现具有基本上是NTSC输入信号的两倍的水平扫描频率的VGA信号，而第二操作模式使得扫描线间隔 被控制为沿着相同扫描线扫描电子束两次，以再现由NTSC输入信号的相同部分形成的频率转换NTSC信号的连续两个线信号。 开关电路响应于指示频率转换的NTSC信号和VGA信号中的至少一个的显示区域的区域信号，以在辅助线圈的第一和第二操作模式之间切换，以便在其上显示高质量图像 图像屏幕的不同显示区域。
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