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    • 7. 发明授权
    • Drive circuit
    • 驱动电路
    • US08077189B2
    • 2011-12-13
    • US11474304
    • 2006-06-22
    • Tatsuya Ishida
    • Tatsuya Ishida
    • G09G5/10
    • G09G3/2081G09G3/22G09G2310/0275G09G2330/028
    • A drive circuit of the present invention is a drive circuit for driving a display element in accordance with grayscale information, which circuit outputs a drive waveform controlled through (i) plural-stepped voltage amplitude modulation and (ii) a pulse width modulation which is settable for each voltage amplitude of the plural-stepped voltage amplitude modulation, the drive circuit including an output control section for (A) latching a pulse width corresponding to a maximum voltage amplitude, according to the grayscale information, which amplitude is one of plural steps of amplitudes of the drive waveform, and which amplitude is to be outputted, so as to control a pulse width of the maximum voltage amplitude, and (B) outputting a maximum pulse width for a voltage amplitude smaller than the maximum voltage amplitude. With this drive circuit, it is possible to realize a drive circuit, whose circuit scale is smaller, for driving a display device including luminescent elements arranged in a matrix manner, the drive circuit generating a drive signal having been controlled by a voltage amplitude modulation (AM) and a pulse width modulation (PWM).
    • 本发明的驱动电路是用于根据灰阶信息驱动显示元件的驱动电路,该电路输出通过(i)多级电压幅度调制控制的驱动波形和(ii)可设定的脉冲宽度调制 对于多级电压幅度调制的每个电压幅度,驱动电路包括用于(A)根据灰度级信息锁存与最大电压幅度相对应的脉冲宽度的输出控制部分,该幅度是多级步骤 驱动波形的幅度和哪个幅度被输出,以便控制最大电压幅度的脉冲宽度,以及(B)输出一个最小脉冲宽度,该电压幅度小于最大电压幅度。 利用该驱动电路,可以实现其电路规模较小的用于驱动包括以矩阵方式配置的发光元件的显示装置的驱动电路,该驱动电路产生已经通过电压幅度调制( AM)和脉冲宽度调制(PWM)。