Patent ID: 7852976
Filing Date: 2010-12-14
Classification: H03K

Abstract:
1. A bidirectional controlling device for receiving input signals from a first input terminal and a second input terminal, and for providing two output signals to a first output terminal and a second output terminal, the bidirectional controlling device comprising: a first switch set comprising a plurality of switches each switch comprising a thin-film transistor (TFT) of a same conductivity type connected in parallel, the first switch set having an input terminal coupled to the first input terminal and an output terminal coupled to the first output terminal; a second switch set comprising a plurality of switches each switch comprising a TFT of the same conductivity type connected in parallel, the second switch set having an input terminal coupled to the first input terminal and an output terminal coupled to the second output terminal; a third switch set comprising a plurality of switches each switch comprising a TFT of the same conductivity type connected in parallel, the third switch set having an input terminal coupled to the second input terminal and an output terminal coupled to the first output terminal; and a fourth switch set comprising a plurality of switches each switch comprising a TFT of the same conductivity type connected in parallel, the fourth switch set having an input terminal coupled to the second input terminal and an output terminal coupled to the second output terminal; wherein each of the first switch set, the second switch set, the third switch set, and the fourth switch set comprises a same number of switches coupled such that when one switch of a plurality of switches receives a high voltage level, all other switches of said plurality of switches other than said one switch receives a low voltage level.