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    • 5. 发明授权
    • Electronic circuit, driving method thereof, electro-optical device, and electronic apparatus
    • 电子电路,其驱动方法,电光装置和电子设备
    • US07460093B2
    • 2008-12-02
    • US11091544
    • 2005-03-29
    • Tokuro OzawaEiji KandaRyoichi Nozawa
    • Tokuro OzawaEiji KandaRyoichi Nozawa
    • G09G3/30
    • G09G3/3233G09G2300/0819G09G2300/0852G09G2300/0861G09G2310/0251G09G2320/043
    • To reduce a time for applying a target voltage to a gate of a driving transistor. During an initializing period, both ends of a capacitive element become a short-circuited state by turning on transistors, so that node A and B becomes a voltage made by subtracting the threshold voltage Vthp of the driving transistor from a power source voltage VEL. During a writing period, the transistor is turned on and a data signal X-j is supplied to change the voltage at the node B as much as a voltage corresponding the current which is to flow into an OLED element. The node A is changed from the threshold voltage as much as the value obtained by dividing the voltage change by capacity ratio. During a light-emitting period, the transistor is turned on, so that the current corresponding to the voltage at the node A flows through the OLED element.
    • 以减少将目标电压施加到驱动晶体管的栅极的时间。 在初始化期间,电容元件的两端通过导通晶体管而成为短路状态,使得节点A和B成为从电源电压VEL减去驱动晶体管的阈值电压Vthp而成的电压。 在写入周期期间,晶体管导通,并且提供数据信号X-j以将节点B处的电压改变为与流入OLED元件的电流相对应的电压。 节点A的阈值电压与通过将电压变化除以容量比得到的值相同。 在发光周期期间,晶体管导通,使得与节点A处的电压相对应的电流流过OLED元件。
    • 7. 发明授权
    • Electro-optical device, method of driving electro-optical device, pixel circuit, and electronic apparatus
    • 电光装置,驱动电光装置的方法,像素电路和电子装置
    • US07592983B2
    • 2009-09-22
    • US11243427
    • 2005-10-05
    • Tokuro OzawaRyoichi Nozawa
    • Tokuro OzawaRyoichi Nozawa
    • G09G3/30G09G5/00G09G3/10
    • G09G3/3233G09G3/2025G09G3/2081G09G3/22G09G3/3291G09G2300/0852G09G2300/0866G09G2300/0876
    • An electro-optical device includes a plurality of pixel circuits that are disposed to correspond to intersections of a plurality of scanning lines and a plurality of data lines, a scanning line driving circuit that sequentially selects the plurality of scanning lines to apply a selection voltage to the selected scanning line, a data line driving circuit that applies any one of an on voltage and an off voltage to the plurality of data lines in accordance with gray-scale levels of pixel circuits corresponding to intersections of the data lines and the selected scanning line by the scanning line driving circuit, and a signal supply circuit that supplies a driving signal, of which the level periodically changes, to a signal supply line. Each of the pixel circuits has a first transistor in which, when the on voltage is applied to a gate electrode, a first terminal is connected to a second terminal, an electro-optical element that is connected to the first terminal of the first transistor, a first capacitor one end of which is connected to the second terminal of the first transistor and simultaneously the other end of which is connected to the signal supply line, a second capacitor one end of which is connected to the gate electrode of the first transistor, and a second transistor in which, when the selection voltage is applied to a gate electrode connected to a corresponding scanning line, a first terminal connected to a corresponding data line is connected to a second terminal connected to one end of the second capacitor.
    • 电光装置包括多个像素电路,其被配置为对应于多条扫描线和多条数据线的交点;扫描线驱动电路,顺序地选择多条扫描线以将选择电压施加到 所选择的扫描线,数据线驱动电路,其根据与数据线和所选择的扫描线的交点对应的像素电路的灰度级,将多个数据线中的任一个施加导通电压和截止电压 通过扫描线驱动电路和将电平周期性变化的驱动信号提供给信号供给线的信号供给电路。 每个像素电路具有第一晶体管,其中当将导通电压施加到栅电极时,第一端子连接到第二端子,连接到第一晶体管的第一端子的电光元件, 第一电容器,其一端连接到第一晶体管的第二端子,同时其另一端连接到信号供给线;第二电容器,其一端连接到第一晶体管的栅电极, 以及第二晶体管,其中当选择电压施加到连接到相应扫描线的栅电极时,连接到相应数据线的第一端连接到连接到第二电容器的一端的第二端。
    • 10. 发明授权
    • Electronic circuit, method of driving the same, electro-optical device, and electronic apparatus
    • 电子电路,其驱动方法,电光装置和电子设备
    • US08232936B2
    • 2012-07-31
    • US12379036
    • 2009-02-11
    • Tokuro OzawaRyoichi Nozawa
    • Tokuro OzawaRyoichi Nozawa
    • G09G3/30G09G3/36G06F3/038
    • G09G3/3233G09G2300/0819G09G2300/0842G09G2310/0251G09G2310/0262G09G2320/0252G09G2320/043
    • To reduce time for writing a target voltage in the gate of a driving transistor. In a first period, a transistor 211 is switched on to allow a driving transistor 210 to function as a diode and transistors 212 and 213 are switched on to electrically connect the drain of the driving transistor 210 to a data line 112, to which an initial voltage is applied, such that the initial voltage is applied to the gate of the driving transistor 210. In a second period, a transistor 212 is switched off such that the gate of the driving transistor 210 is maintained to have an off voltage corresponding to the power source. In a third period, the transistor 211 is switched off such that the voltage of the data line 112 is converted into a grayscale voltage to maintain the gate of the driving transistor at the target voltage. In a fourth period, the driving transistor 210 flows the current corresponding to the maintained gate voltage to an OLED element 230.
    • 以减少在驱动晶体管的栅极中写入目标电压的时间。 在第一时段中,晶体管211接通以允许驱动晶体管210用作二极管,并且晶体管212和213导通以将驱动晶体管210的漏极电连接到数据线112,初始 施加电压,使得初始电压被施加到驱动晶体管210的栅极。在第二时段中,晶体管212截止,使得驱动晶体管210的栅极保持为具有对应于 能量源。 在第三时段中,晶体管211被关断,使得数据线112的电压被转换成灰度级电压,以将驱动晶体管的栅极保持在目标电压。 在第四时段中,驱动晶体管210将对应于保持的栅极电压的电流流向OLED元件230。