发明授权
- 专利标题: Scanning conversion display apparatus
- 专利标题(中): 扫描转换显示装置
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申请号: US938514申请日: 1992-09-02
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公开(公告)号: US5301031A公开(公告)日: 1994-04-05
- 发明人: Masahiro Eto , Nobuaki Kabuto , Mitsuo Tanaka
- 申请人: Masahiro Eto , Nobuaki Kabuto , Mitsuo Tanaka
- 申请人地址: JPX Tokyo
- 专利权人: Hitachi Ltd.
- 当前专利权人: Hitachi Ltd.
- 当前专利权人地址: JPX Tokyo
- 主分类号: G09G3/28
- IPC分类号: G09G3/28 ; G09G3/36 ; H04N3/12 ; H04N5/46 ; H04N5/74 ; H04N7/01 ; H04N9/30
摘要:
A display apparatus using a matrix display panel, such as a liquid crystal panel, for converting the number of scanning lines to be displayed to a number that can be accommodated on a panel having a smaller number of scanning lines. The apparatus includes a control circuit which produces control signals in synchronism with the input video signal, horizontal and vertical scanning circuits each including a shift register operated by the control circuit, and a display panel which is formed of a matrix arrangement of pixels that are driven selectively by the scanning circuits. The apparatus further includes a circuit which halts the operation of the vertical shift register at a certain interval within the effective scanning period of the vertical scanning circuit so as to extract vertical shift clocks, thereby removing the vertical shift clocks within the effective display period of the video signal, thereby extracting periodically extracting scanning lines.