Display device with light emitting elements
    1.
    发明授权
    Display device with light emitting elements 有权
    具有发光元件的显示装置

    公开(公告)号:US07221349B2

    公开(公告)日:2007-05-22

    申请号:US10841449

    申请日:2004-05-10

    IPC分类号: G09G3/36

    摘要: A display current of a whole gray scale range according to a display signal of four bits is produced from a sum of output currents of an analog current supply circuit producing a first output current according to lower data bits and two digital current supply circuits operating in accordance with corresponding data bits to execute or stop generation of second and third output currents according to higher data bits. The analog current supply circuit has a calibration function of compensating for output current variations due to transistor characteristics at one point in a control range of the first output current. A display device with light-emitting elements can accurately generate a display current for gray-scale expression without imposing an excessive load on a manufacturing process while suppressing circuit footprint.

    摘要翻译: 从根据低位数据位产生第一输出电流的模拟电流供给电路的输出电流和根据低位数据位操作的两个数字电流供给电路产生根据四位显示信号的整个灰度范围的显示电流 具有相应的数据位以根据较高数据位执行或停止产生第二和第三输出电流。 模拟电流供应电路具有校正功能,其补偿由于在第一输出电流的控制范围内的一个点处的晶体管特性引起的输出电流变化。 具有发光元件的显示装置可以精确地生成用于灰度表达的显示电流,而不会在制造过程中施加过大的负载,同时抑制电路占用面积。