Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2005-10-11
2005-10-11
Nguyen, Chanh (Department: 2675)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S076000, C345S205000, C345S206000, C345S215000
Reexamination Certificate
active
06954194
ABSTRACT:
A semiconductor device for individually controlling an element to be driven, such as an electroluminescence element, includes a switching TFT which operates when a selection signal is applied to its gate and which also captures a data signal, and an element-driving TFT in which its drain is connected with a drive power source, its source is connected with the element to be driven, gate receives a data signal supplied from the switching TFT, for controlling electric power supplied from the drive power source to the element to be driven. The semiconductor device further includes a storage capacitor having a first electrode connected with the switching TFT and with the gate of the element-driving TFT and a second electrode connected between the source of the element-driving TFT and the element to be driven, for holding the gate-source voltage of the element-driving TFT in accordance with the data signal, and a switching element for controlling the potential of the second electrode of the storage capacitor. With such a configuration, all the above-described switches can be formed by TFTs of the same conductivity type and reliable supply of electric power to the element to be driven can be assured.
REFERENCES:
patent: 6417825 (2002-07-01), Stewart et al.
patent: 6639244 (2003-10-01), Yamazaki et al.
patent: 2001/0009283 (2001-07-01), Arao et al.
patent: 2002/0030190 (2002-03-01), Ohtani et al.
patent: 2002/0052086 (2002-05-01), Maeda
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Matsumoto Shoichiro
Sano Keiichi
Beck Alexander S.
Cantor & Colburn LLP
Nguyen Chanh
Sanyo Electric Co,. Ltd.
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