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    • 21. 发明授权
    • Liquid crystal display device having an improved gray-scale voltage generating circuit
    • 具有改进的灰度电压发生电路的液晶显示装置
    • US06535189B1
    • 2003-03-18
    • US09621699
    • 2000-07-21
    • Kenichi AkiyamaYuji YamashitaHironobu IsamiMitsuru GotoShinji YasukawaKoichi Kotera
    • Kenichi AkiyamaYuji YamashitaHironobu IsamiMitsuru GotoShinji YasukawaKoichi Kotera
    • G09G336
    • G09G3/2011G09G3/3688G09G2310/0297
    • A liquid crystal display device includes a liquid crystal panel having plural pixels and a video signal line driver circuit for supplying a video signal voltage to each of the pixels via a corresponding one of plural video lines in accordance with a P-bit display data. The video signal line driver circuit includes a power supply circuit for supplying Q different gray-scale voltages, plural selector circuits corresponding to the video lines, each of the selector circuits for outputting one of first and second pairs of voltages in accordance with the display data, the first pair being two voltages equal to a same one selected from among the Q different gray-scale voltages, the second pair being two different voltages selected from among the Q different gray-scale voltages, and plural amplifiers corresponding to the video lines, each of the amplifiers for outputting the video signal voltage to a corresponding one of the video lines based upon one of the first and second pairs of voltages or a voltage intermediate between the second pair of voltages and produced from the second pair of voltages in the amplifiers.
    • 液晶显示装置包括具有多个像素的液晶面板和视频信号线驱动电路,用于根据P位显示数据经由多个视频行中的相应一个视频信号电压向每个像素提供视频信号电压。 视频信号线驱动电路包括用于提供Q个不同灰度电压的电源电路,对应于视频线的多个选择器电路,每个选择器电路用于根据显示数据输出第一和第二对电压中的一个 所述第一对是等于从所述Q个不同灰度级电压中选择的相同的两个电压,所述第二对是从所述Q个不同的灰度级电压中选出的两个不同的电压,以及对应于所述视频线的多个放大器, 每个放大器用于基于第一和第二对电压中的一个或者在第二对电压之间的电压之间输出视频信号电压到相应的一条视频线,并且由放大器中的第二对电压产生 。