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    • 106. 发明授权
    • On-screen display device
    • 屏幕显示设备
    • US07170564B2
    • 2007-01-30
    • US10752509
    • 2004-01-08
    • Toshihiko MaruokaKeisuke Tanaka
    • Toshihiko MaruokaKeisuke Tanaka
    • H04N5/445G09G5/22G09G5/36G06T11/00H04N9/76H04N9/74
    • G09G5/225G09G5/222H04N5/44504
    • This invention provides an on-screen display device that can display an increased number of types of characters without enlarging the video RAM area. This on-screen display device includes a character generator ROM that has n (n is an integer that is equal to or larger than 3) areas, a flag holding unit that outputs an area designation flag for designating a desired number of desired areas among the n areas in the character generator ROM, a display character setting unit that writes a desired character code at a predetermined position in a video RAM, and a display control unit that reads the character code from the video RAM, reads font data corresponding to the read character code from an area in the character generator ROM, which is indicated by the area designation flag outputted from the flag holding unit, and outputs an on-screen output signal using the font data.
    • 本发明提供一种屏幕显示装置,其可以在不放大视频RAM区域的情况下显示增加数量的字符类型。 该屏幕显示装置包括具有n(n为3以上的整数)区域的字符发生器ROM,标志保持单元,输出用于指定所需区域的期望数量的区域指定标志 字符发生器ROM中的n个区域,在视频RAM中的预定位置写入期望的字符代码的显示字符设置单元和从视频RAM读取字符代码的显示控制单元读取与读取的字体数据相对应的字体数据 字符代码从字符发生器ROM中的区域指示,由标志保持单元输出的区域指定标志指示,并使用字体数据输出屏幕上的输出信号。