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    • 13. 发明授权
    • Drive circuit and image display apparatus
    • 驱动电路和图像显示装置
    • US07116300B2
    • 2006-10-03
    • US09938614
    • 2001-08-27
    • Hiroshi KageyamaYoshiro MikamiHajime Akimoto
    • Hiroshi KageyamaYoshiro MikamiHajime Akimoto
    • G09G3/36
    • G09G3/32G09G2300/08G09G2310/027G09G2310/0275
    • Specified thin-film transistors 26 and 27 are caused to conduct by a gradation signal inputted in control circuits 24 and 25, and resistors with a conduction resistance of activated transistors are inserted between any of reference voltages V0, V2, and V4 and an output terminal T1 or between any of reference voltages V1 and V3 and an output terminal T2, and a pair of thin-film transistors 29 in a sampling circuit 23 are caused to conduct simultaneously in sync with the gradation signal. If a signal line SL1 is selected, reference voltages V0, V2, or V4 and V1 or V3 are applied to the signal line SL1, either as they are or as divided by the conduction resistance of the activated thin-film transistors, by using a junction point between the sampling circuit 23 and signal line SL1 as a voltage dividing point.
    • 使指定的薄膜晶体管26和27通过输入到控制电路24和25中的灰度信号导通,并且将具有激活的晶体管的导通电阻的电阻器插入到参考电压V 0,V 2和V 4中的任一个之间,以及 使输出端子T1或参考电压V 1和V 3中的任一个以及输出端子T 2以及采样电路23中的一对薄膜晶体管29与灰度信号同步地导通。 如果选择了信号线SL 1,则将参考电压V 0,V 2或V 4和V 1或V 3按原样施加到信号线SL 1,或者被激活的薄片的导通电阻除 通过使用采样电路23和信号线SL 1之间的连接点作为分压点。
    • 15. 发明授权
    • Liquid crystal display device
    • 液晶显示装置
    • US06646637B1
    • 2003-11-11
    • US09709434
    • 2000-11-13
    • Hiroshi KageyamaHideo SatoYoshiro Mikami
    • Hiroshi KageyamaHideo SatoYoshiro Mikami
    • G09G500
    • G09G3/2011G09G3/3688G09G2310/0248G09G2310/0251G09G2310/027
    • Each of a plurality of D/A conversion circuits DA1˜DA4 is constituted by a plurality of switching thin film transistors (TFTs), each having substantially the same ON resistance, and a control circuit performing ON and OFF control of the switching TFTs in such a manner that, during a D/A conversion operation a predetermined same plural number of switching TFTs are turned ON for any digital input signal representing gradations to be displayed, thereby, the output resistance of each of the D/A conversion circuits is kept substantially constant. Accordingly, multi-gradation and high resolution of a liquid display device are easily achieved and the image quality thereof is improved.
    • 多个D / A转换电路DA1〜DA4中的每一个由多个开关薄膜晶体管(TFT)构成,每个开关薄膜晶体管具有基本上相同的导通电阻,以及控制电路,其执行开关TFT的ON和OFF控制 在D / A转换操作期间,对于要表示所显示的等级的任何数字输入信号,预定相同数量的开关TFT导通,从而每个D / A转换电路的输出电阻基本上保持 不变。 因此,易于实现液晶显示装置的多层次化和高分辨率,并提高其图像质量。
    • 18. 发明授权
    • Image display device having a reset switch for setting a potential of a capacitor to a predetermined reference state
    • 图像显示装置具有用于将电容器的电位设定为预定基准状态的复位开关
    • US08749460B2
    • 2014-06-10
    • US12547613
    • 2009-08-26
    • Hajime AkimotoHiroshi KageyamaTohru Kohno
    • Hajime AkimotoHiroshi KageyamaTohru Kohno
    • G09G3/32
    • G09G3/3233G09G2310/0262G09G2320/045
    • Provided is an image display device including: a plurality of pixel scanning lines; a plurality of signal lines; and a plurality of pixel circuits corresponding to intersections between the pixel scanning lines and the signal lines. Each of the pixel circuits includes: a driver transistor; a light emitting element for emitting light based on the current supplied from the driver transistor; a pixel switch for generating a potential based on an image signal and a scanning signal; a capacitor element for controlling the driver transistor based on a potential difference caused by the potential supplied from the pixel switch; and a reset switch for setting a potential at an end of the capacitor element to a predetermined state based on a scanning signal supplied from one of the pixel scanning lines preceding the scanning signal which corresponds to the corresponding one of the plurality of pixel circuits.
    • 提供一种图像显示装置,包括:多个像素扫描线; 多条信号线; 以及对应于像素扫描线和信号线之间的交点的多个像素电路。 每个像素电路包括:驱动晶体管; 基于从驱动晶体管提供的电流发光的发光元件; 用于基于图像信号和扫描信号产生电位的像素开关; 电容器元件,用于基于由所述像素开关提供的电位引起的电位差来控制所述驱动晶体管; 以及复位开关,用于基于从与所述多个像素电路中的对应的一个像素电路对应的扫描信号之前的像素扫描线之一提供的扫描信号,将电容器元件的一端的电位设定为预定状态。