Bidirectional shifter register and method of driving same

Abstract

A bidirectional shift register includes first, second, third and fourth control signal bus lines for providing first, second, third and fourth control signals, Bi, Bi, Biand Bi, respectively, and a plurality of shift register stages electrically coupled in serial, each shift register stage having first and second input nodes, where the shift register stages are grouped into a first section and a second section, where the first and second input nodes of each shift register stage in the first section are electrically coupled to the first and second control signal bus lines for receiving the first and second control signals Biand Bi, respectively, and the first and second input nodes of each shift register stage in the second section are electrically coupled to the third and fourth control signal bus lines for receiving the third and fourth control signals Biand Bi, respectively.