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    • 4. 发明授权
    • Display device and method for driving same
    • 显示装置及其驱动方法
    • US09336718B2
    • 2016-05-10
    • US14404378
    • 2013-04-30
    • Sharp Kabushiki Kaisha
    • Toshinori SugiharaNoboru Noguchi
    • G09G5/10G09G3/32
    • G09G3/3233G09G3/3291G09G2300/0819G09G2300/0852G09G2300/0861G09G2310/0256G09G2310/08G09G2320/045
    • In a pixel circuit, during a period during which an organic EL element is not emitting light, a transistor is in an “on” state and a reverse-direction voltage determined by a reverse-direction current that depends on the degree to which degradation of the organic EL element has progressed is written to a capacitor. The transistor then turns off, another transistor turns on, and a compensating current that depends on the reverse-direction voltage flows from another capacitor towards a reverse-biasing power-supply line, causing a drive voltage maintained by the capacitor to change by a compensating voltage change. This makes it possible to minimize decreases in the emission luminance of an electro-optical element such as an organic EL element due to degradation thereof over time.
    • 在像素电路中,在有机EL元件不发光的时段期间,晶体管处于“导通”状态,反向电压由逆向电流决定,反向电流取决于 有机EL元件已经进行写入电容器。 然后,晶体管关断,另一个晶体管导通,取决于反向电压的补偿电流从另一个电容器流向反向偏置电源线,导致由电容器维持的驱动电压通过补偿 电压变化。 这使得可以使由于其随着时间的劣化而导致的有机EL元件等电光元件的发光亮度的降低最小化。
    • 8. 发明授权
    • Liquid crystal display panel
    • US10670923B2
    • 2020-06-02
    • US15772048
    • 2016-10-24
    • SHARP KABUSHIKI KAISHA
    • Fumikazu ShimoshikiryohToshinori SugiharaTakehisa Yoshida
    • G02F1/1337G02F1/1343
    • A liquid crystal display panel includes in the following order: a first substrate including pixel electrodes; a liquid crystal layer; and a second substrate including a counter electrode. The liquid crystal display panel includes pixels each including at least four alignment regions that provide different tilt azimuths to the liquid crystal molecules. The four alignment regions are arranged in a longitudinal direction of the pixels. The pixel electrodes are each provided with linear slits. The slits are formed in a region between one pixel edge of each pixel in the longitudinal direction and a center line of the pixel in the transverse direction in each alignment region. The liquid crystal molecules are aligned in a direction substantially perpendicular to the first substrate and the second substrate and at a tilt in the respective tilt azimuth directions with no voltage applied to the liquid crystal layer. The liquid crystal molecules are at a twist angle of substantially 45° or smaller. Upon application of voltage to the liquid crystal layer, the liquid crystal molecules are to be more tilted in the respective tilt azimuth directions and the tilt azimuth of each liquid crystal molecule is a given azimuth in each region in which the slits are formed.
    • 9. 发明授权
    • Display device and method for driving same
    • 显示装置及其驱动方法
    • US09335598B2
    • 2016-05-10
    • US14404354
    • 2013-04-30
    • Sharp Kabushiki Kaisha
    • Toshinori SugiharaNoboru Noguchi
    • G09G3/32G02F1/1362
    • G02F1/136286G09G3/3233G09G3/3291G09G2300/0819G09G2300/0852G09G2300/0861G09G2310/0256G09G2310/08G09G2320/045
    • In a pixel circuit, during a period during which an organic EL element is not emitting light, transistors are in an “on” state and the organic EL element (OLED) is reversed-biased by a low-level power-supply potential and a reverse-biasing power-supply potential. A reverse-direction voltage determined by a reverse-direction current that depends on the degree to which degradation of the organic EL element has progressed is thus written to a capacitor. A data voltage is then supplied to the capacitor via another capacitor, bringing the drive voltage of a transistor (T2) that controls the current that drives the organic EL element to Vsig+Voledr. This makes it possible to minimize decreases in the emission luminance of an electrooptical element such as an organic EL element due to degradation thereof over time.
    • 在像素电路中,在有机EL元件不发光的期间,晶体管为“导通”状态,有机EL元件(OLED)通过低电平电源电位反向偏置, 反向偏置电源电位。 由反向电流确定的反向电压取决于有机EL元件的劣化程度而进行的反向电压被写入电容器。 然后通过另一个电容将数据电压提供给电容器,使驱动有机EL元件的电流的晶体管(T2)的驱动电压为Vsig + Voledr。 这使得可以最小化由于其随着时间的劣化而导致的有机EL元件等电光元件的发光亮度的降低。