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    • 3. 发明申请
    • Liquid Crystal Display Device and Method for Driving Same
    • 液晶显示装置及其驱动方法
    • US20090267884A1
    • 2009-10-29
    • US12086055
    • 2006-10-25
    • Kozo TakahashiAsahi YamatoKiyoshi NakagawaTakaaki Kawai
    • Kozo TakahashiAsahi YamatoKiyoshi NakagawaTakaaki Kawai
    • G09G3/36
    • G09G3/3648G09G3/3614G09G2320/0252G09G2320/0261G09G2320/0285G09G2340/16
    • A drive circuit of a liquid crystal display device performs line inversion drive based on a correction video signal V. A look-up table (12) includes two types of tables having stored therein correction values for use in overshoot drive. Based on a current-frame video signal X, a previous-frame video signal Y stored in a frame memory (11), and a polarity-reversing signal REV, a correction process portion (13) reads a correction value from the look-up table (12), and outputs the correction value being read as the correction video signal V. In such a manner, a correcting circuit (10) is used to control the degree of overshoot in accordance with the polarity-reversing signal REV. Thus, it is possible to suitably control the change in pixel brightness regardless of the polarity of the applied voltage, thereby preventing any fringes from being generated while displaying moving images.
    • 液晶显示装置的驱动电路基于校正视频信号V执行线路反转驱动。查找表(12)包括存储有用于过冲驱动的校正值的两种类型的表。 基于当前帧视频信号X,存储在帧存储器(11)中的前一帧视频信号Y和极性反转信号REV,校正处理部分(13)从查找中读取校正值 输出正在读取的校正值作为校正视频信号V.以这种方式,校正电路(10)用于根据极性反转信号REV来控制过冲度。 因此,无论施加电压的极性如何,都可以适当地控制像素亮度的变化,从而防止在显示运动图像时产生任何边缘。
    • 4. 发明申请
    • IMAGE DISPLAY DEVICE
    • 图像显示设备
    • US20110193888A1
    • 2011-08-11
    • US12998303
    • 2009-06-02
    • Asahi YamatoKozo Takahashi
    • Asahi YamatoKozo Takahashi
    • G09G3/36G09G5/10
    • G09G3/3611G09G3/342G09G2320/0247G09G2320/064G09G2320/0646G09G2320/0653G09G2360/16
    • An image characteristic judgement circuit analyzes input image data and obtains first brightness data indicating brightness of a backlight within a single vertical period and image characteristic data corresponding to the first brightness data. In at least one embodiment, an image data conversion circuit performs conversion to the input image data according to the image characteristic data and outputs the image data after the conversion to a liquid crystal panel. A period-by-period brightness calculation circuit obtains, based on the first brightness data, second brightness data indicating brightness of the backlight within each of a plurality of periods into which the single vertical period is divided. A brightness setting circuit 18 controls the brightness of the backlight using the second brightness data. Flickers in a screen are reduced by changing the brightness of the backlight within a single vertical period in this manner.
    • 图像特性判断电路分析输入图像数据,并获得指示单个垂直周期内的背光的亮度的第一亮度数据和对应于第一亮度数据的图像特征数据。 在至少一个实施例中,图像数据转换电路根据图像特性数据执行到输入图像数据的转换,并将转换后的图像数据输出到液晶面板。 逐周期亮度计算电路基于第一亮度数据获得指示分割单个垂直周期的多个周期中的每一个中的背光的亮度的第二亮度数据。 亮度设定电路18使用第二亮度数据来控制背光的亮度。 通过以这种方式在单个垂直周期内改变背光的亮度来减少屏幕中的闪烁。