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Method for displaying 4: 3 screen in 16: 9 screen of LCD projector and its device

机译:液晶投影仪的16:9画面中4:3画面的显示方法及其装置

摘要

According to the present invention, when displaying 4: 3 video signal on a 16: 9 widescreen, the 4: 9 4:16 screen of a liquid crystal projection apparatus can reduce the size of the screen left and right by changing the shift clock frequency of the source driver. A three-screen display method and apparatus therefor. The present invention outputs pulse signals having different frequencies from the variable pulse generator, the fast pulse generator, and the normal pulse generator by using the clock signal generated by the phase-locked loop circuit. The switching unit under the control of the compression mode indicating unit selects one of the pulse signals according to the screen display mode and outputs it as a shift clock signal. In addition, the start time of the start clock signal is controlled differently according to the screen display mode to change the size of the side blank. Accordingly, the center portion of the screen may display a time-compressed image, and the left and right sides of the screen may display an image expanded at a different ratio according to the screen display mode, thereby reducing distortion.
机译:根据本发明,当在16:9宽屏上显示4:3视频信号时,液晶投影设备的4:9 4:16屏幕可以通过改变移位时钟频率来减小左右屏幕的尺寸。源驱动程序。三屏显示方法及其装置。本发明通过使用由锁相环电路产生的时钟信号从可变脉冲发生器,快速脉冲发生器和正常脉冲发生器输出具有不同频率的脉冲信号。在压缩模式指示单元的控制下,切换单元根据屏幕显示模式选择脉冲信号之一,并将其​​作为移位时钟信号输出。另外,根据屏幕显示模式来不同地控制开始时钟信号的开始时间,以改变侧空白的尺寸。因此,屏幕的中央部分可以显示时间压缩的图像,并且屏幕的左侧和右侧可以显示根据屏幕显示模式以不同比例扩展的图像,从而减少失真。

著录项

  • 公开/公告号KR960003373A

    专利类型

  • 公开/公告日1996-01-26

    原文格式PDF

  • 申请/专利权人 김광호;

    申请/专利号KR19940012560

  • 发明设计人 김익송;

    申请日1994-06-03

  • 分类号H04N7/00;

  • 国家 KR

  • 入库时间 2022-08-22 03:45:50

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