公开(公告)号：US20040125069A1

公开(公告)日：2004-07-01

申请号：US10422810

申请日：2003-04-25

Applicant: LG.Philips LCD Co.,Ltd.

Inventor： Jae Deok Park ,  Du Hwan Oh

IPC: G09G003/36

CPC classification number: G11C19/184 ,  G09G3/3666 ,  G09G3/3688 ,  G09G2310/0283 ,  G09G2310/0289 ,  G11C19/28

Abstract: A bi-directional driving circuit of a flat panel display device and method for driving the same is disclosed in the present invention. The bi-directional driving circuit of a flat panel display device having a plurality of blocks driven by a start pulse Vst, first to fourth clock signals having different phases CLK1, CLK2, CLK3, and CLK4, and first and second power source voltages Vdd and Vss, each block includes a shift register comprising a first control part charging the start pulse Vst or an output signal of a previous block to a first node Q according to either one of the first to fourth clock signals or a second node QB, a second control part controlling the second node QB according to the start pulse Vst, either the output signal of the previous block or an output signal of the next block, and one of the first to fourth clock signals, a third control part charging the start pulse Vst or the output signal of the next block to the first node Q according to either one of the first to fourth clock signals, or controlling the second node QB, and a buffer outputting one of the first to fourth clock signals as a shift pulse according to the first and second nodes Q and QB; and a level shifter shifting a level of the shift pulse output from the shift register in each block, and outputting the shifted level.

Abstract translation: 本发明公开了一种平板显示装置的双向驱动电路及其驱动方法。 具有由启动脉冲Vst驱动的多个块的平板显示装置的双向驱动电路，具有不同相位CLK1，CLK2，CLK3和CLK4的第一至第四时钟信号以及第一和第二电源电压Vdd和 Vss，每个块包括移位寄存器，其包括根据第一至第四时钟信号中的任一个或第二节点QB将起始脉冲Vst的起始脉冲Vst或先前块的输出信号充电至第一节点Q的第一控制部分， 根据起始脉冲Vst控制第二节点QB的控制部分，先前块的输出信号或下一个块的输出信号，以及第一至第四时钟信号中的一个;第三控制部分，对起始脉冲Vst充电 或根据第一至第四时钟信号中的任何一个的下一个块到第一节点Q的输出信号，或者控制第二节点QB，以及将第一至第四时钟信号中的一个作为移位 根据第一和第二节点Q和QB的脉冲; 并且电平移位器移位在每个块中从移位寄存器输出的移位脉冲的电平，并输出移位电平。