Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2006-06-06
2006-06-06
Liang, Reginia (Department: 2674)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C377S064000
Reexamination Certificate
active
07057598
ABSTRACT:
A drive circuit of a display device, which comprise only single conductive TFTs and in which amplitude of an output signal is normal, is provided.A pulse is inputted to TFTs101and104so that the TFTs would turn ON and then potential of a node á rises. When the potential of the node á reaches (VDD−VthN), the node á became in a floating state. Accordingly, a TFT105then turns ON, and potential of an output node rises as a clock signal reaches the level H. On the other hand, potential of a gate electrode of the TFT105further rises due to an operation of capacitance107as the potential of the output node rises, so that the potential of the output node would be higher than (VDD+VthN). Thus, the potential of the output node rises to VDD without voltage drop caused by a threshold of the TFT105.An output at the subsequent stage is then inputted to TFTs102and103to turn the TFTs102and103ON, while the potential of the node á drops down to turn the TFT105OFF. A TFT106turns ON at the same time so that the potential of the output node would reach the level L.
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Search Report (Singapore Application No. 200202969-2), Apr. 27, 2004, 8 pages.
Azami Munehiro
Nagao Shou
Tanada Yoshifumi
Dinh Duc
Fish & Richardson P.C.
Liang Reginia
Semiconductor Energy Laboratory Co,. Ltd.
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