Electrical pulse counters – pulse dividers – or shift registers: c – Shift register
Reexamination Certificate
2008-11-11
2010-11-09
Lam, Tuan (Department: 2816)
Electrical pulse counters, pulse dividers, or shift registers: c
Shift register
C377S069000
Reexamination Certificate
active
07831010
ABSTRACT:
A bidirectional shift register in which an operation margin is not lowered when a shift direction of a signal is switched is provided. A unit shift register SRkat one stage of a plurality of stages of shift registers includes a gate line drive unit, a forward shift unit, and backward shift unit each capable of operating as one-stage shift register. The gate line drive unit outputs a gate line drive signal Gkto a gate line GLkin response to a previous-stage forward signal Gnk−1and a subsequent-stage backward signal Grk+1. The forward shift unit performs only forward shift to output a forward signal Gnkto the subsequent-stage in response to the previous-stage forward signal Gnk−1, and the backward shift unit performs only backward shift to output a backward signal Grkto the previous-stage in response to the subsequent-stage backward signal Grk+1.
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Lam Tuan
Mitsubishi Electric Corporation
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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