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    • 1. 发明申请
    • OFFSET COMPENSATION GAMMA BUFFER AND GRAY SCALE VOLTAGE GENERATION CIRCUIT USING THE SAME
    • 偏移补偿伽马缓冲器和灰度级电压发生电路
    • US20100265274A1
    • 2010-10-21
    • US12741924
    • 2008-10-30
    • Dae-Keun HanDae-Seong KimJoon-Ho NaAn-Young KimMan-Jeong Ko
    • Dae-Keun HanDae-Seong KimJoon-Ho NaAn-Young KimMan-Jeong Ko
    • G09G5/10G09G3/36
    • G09G3/3688G09G2310/027
    • Disclosed are an offset compensation gamma buffer and a gray scale voltage generation circuit using the same. The offset compensation gamma buffer includes: a buffer which outputs an input voltage input to a positive or negative input terminal as an output voltage; and a switching unit which selectively connects the input voltage and the output voltage of the buffer to the positive and negative input terminals in response to a control signal. The output voltage of the offset compensation gamma buffer is supplied to the input of a gray scale voltage generation circuit of a source driver for driving a liquid crystal panel. The offset of the offset compensation gamma buffer is compensated using an inversion timing of the control signal. The output voltage of the offset compensation gamma buffer is supplied as a reference voltage of the voltage divider unit for generating the gray scale voltages, and the offset of the gray scale voltages is also compensated.
    • 公开了一种偏移补偿伽马缓冲器和使用其的灰度级电压产生电路。 偏移补偿伽马缓冲器包括:输出输入到正或负输入端的输入电压作为输出电压的缓冲器; 以及切换单元,其响应于控制信号选择性地将缓冲器的输入电压和输出电压连接到正负输入端子。 偏移补偿伽马缓冲器的输出电压被提供给用于驱动液晶面板的源极驱动器的灰度级电压产生电路的输入端。 使用控制信号的反转定时来补偿偏移补偿伽马缓冲器的偏移。 偏移补偿伽马缓冲器的输出电压作为分压器单元的基准电压被提供,用于产生灰度级电压,并且补偿灰度级电压的偏移。