Patent ID: 9508449
Filing Date: 2016-11-29
CPC Classification: G09G,G11C

Claim Text:
1. A bidirectional shift register device, for a display panel having a plurality of pixels arranged in an array, wherein the array has a plurality of odd rows and a plurality of even rows, wherein the number of the odd rows and the number of the even rows are positive integers, comprising: N stage shift registers connected in series as 1 M stage shift registers connected in series as 1 wherein an i a pre-charge unit receiving an output from an (i−2) a pull-up unit coupled to the pre-charge unit, the pull-up unit receiving the pre-charge signal and a predetermined clock signal and outputting a scan signal according to the pre-charge signal and the predetermined clock signal; and a pull-down unit coupled to the pre-charge unit and the pull-up unit, the pull-down unit comprising: a first discharge unit receiving the pre-charge signal and a first level signal and determining whether to pull the scan signal down to a reference voltage potential according to the pre-charge signal and a first voltage-dividing signal associated with the first level signal; and a second discharge unit receiving the pre-charge signal and a second level signal and determining whether to pull the scan signal down to the reference voltage potential according to the pre-charge signal and a second voltage-dividing signal associated with the second level signal.