Patent ID: 8045675
Filing Date: 2011-10-25
Classification: G11C

Abstract:
1. A bi-directional shift register for outputting N output signals along a first shifting direction or outputting the N output signals along a second shifting direction, wherein the bi-directional shift register comprises N stages, N is a natural number greater than 1, and an mth stage circuit among the N stages comprises: a first node having a first control signal; an output end for outputting an output signal of the mth stage; a first input circuit coupled to the output end of an (m−1)th stage to receive the output signal of the (m−1)th stage, wherein the first input circuit receives the output signal of the (m−1)th stage as a control signal and a power signal to accordingly generate an enabled first driving signal to the first node in a first period; a second input circuit coupled to the output end of an (m+1)th stage to receive the output signal of the (m+1)th stage, wherein the second input circuit receives the output signal of the (m+1)th stage as a control signal and a power signal to accordingly generate an enabled second driving signal to the first node in a third period; and a shift register unit controlled by the first control signal corresponding to one of the enabled first driving signal and the enabled second driving signal to accordingly generate the enabled output signal of the mth stage in a second period, wherein m is a natural number smaller than or equal to N; wherein the shift register unit comprises: