Ripple preventing gate driving circuit and display apparatus having the same

A display apparatus comprising:

• a display part which displays an image based on a gate signal and a data signal;
• a data driving circuit which applies the data signal to the display part;
• and
• a gate driving circuit comprising stages to sequentially apply the gate signal to the display part, the stages being cascaded with each other and each of the stages comprising:
• a pull-up part which pulls up a gate voltage to a clock signal in response to a control voltage of a control terminal (Q-node) of the pull-up part during a horizontal scanning period (1H);
• a carry part which pulls up a carry voltage to the clock in response to the control voltage of the Q-node during the horizontal scanning period (1H)), the Q-node being connected to a control electrode of the carry part;
• a pull-up driving part connected to the Q-node common to the carry part and the pull-up part and which receives a previous carry voltage from a first previous stage and outputs the control voltage to the Q-node;
• and
• a ripple preventing part that includes a control electrode directly connected to the Q-node common to the carry part and the pull-up part, wherein the ripple preventing part prevents a ripple generated at a previous Q-node of a second previous stage based on a ripple generated at the Q-node of the carry part and the pull-up part.

A method for driving a gate driving circuit comprising cascaded stages, the method comprising:

• pulling up a gate voltage to a clock signal during a horizontal scanning period (1H) using a pull-up part including a control terminal (Q-node);
• pulling up a carry voltage to the clock signal during the horizontal scanning period (1H) using a carry part including a control electrode connected to the Q-node;
• receiving a previous carry voltage from a first previous stage with a pull-up driving part connected to the Q-node common to the carry part and the pull-up part to turn on the pull-up part and the carry part;
• and
• preventing a ripple generated at a previous Q-node of a second previous stage based on a ripple generated at the Q-node of the carry part and the pull-up part using a ripple preventing part including a control electrode directly connected to the Q-node common to the carry part and the pull-up part.