Patent ID: 8659533
Filing Date: 2014-02-25
Classification: G09G,G11C

Abstract:
1. A bi-directional driving circuit of a liquid crystal display (LCD) panel having a plurality of blocks, each block comprising: a first switching element having a source and a gate to which a start pulse is applied; a third switching element having a source directly connected to a drain of the first switching element and a drain directly connected to a ground Vss terminal; a fourth switching element having a source connected to a power source Vdd terminal, a gate connected to a first clock signal, and a drain connected to a gate of the third switching element; a fifth switching element having a source connected to the drain of the fourth switching element, a gate connected to the source of the first switching element, and a drain connected to the Vss terminal; a sixth switching element having a source connected to a second clock signal, a gate connected to the drain of the first switching element, and a drain connected to an output terminal; a seventh switching element having a source connected to the output terminal, a gate connected to the drain of the fourth switching element, and a drain connected to the Vss terminal; eighth switching elements for switching the start pulse VST applied to the gate and the source of the first switching element in a first block and for switching an output signal applied to the gate and the source of the first switching element in a next block, through an external forward control signal; and a ninth switching elements for switching the start pulse VST applied to the gate and the source of the first switching element in the last block and for switching an output signal applied to the gate and the source of the first switching element in a previous block, through an external backward control signal.