Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device
Reexamination Certificate
2005-01-11
2005-01-11
Vu, David (Department: 2828)
Electric lamp and discharge devices: systems
Plural power supplies
Plural cathode and/or anode load device
C345S076000
Reexamination Certificate
active
06841948
ABSTRACT:
Provided is a device for driving an active matrix type luminescent display panel, which can effectively apply a reverse bias voltage to a luminescent element via a drive TFT. A luminescent element14constituting one pixel10is light-up driven by a control TFT11and a drive TFT12. A serial circuit of the drive TFT12and the luminescent element14is connected to a power source circuit via a switch S1and a switch S2, whereby a state where a forward-directional current is supplied to the luminescent element or a state where a reverse bias voltage is applied to the luminescent element is selected. By using, as the control TFT11and the drive TFT12, TFT of the channel type of that is the same, it is possible to maintain the drive TFT12to be in an “on” state when having applied a reverse bias voltage to the luminescent element14. By doing so, it becomes possible to effectively apply a reverse bias voltage to the luminescent element.
REFERENCES:
patent: 6583581 (2003-06-01), Kaneko et al.
patent: 6774877 (2004-08-01), Nishitoba et al.
patent: 9-232074 (1997-09-01), None
patent: 2001-109432 (2001-04-01), None
patent: 2001-117534 (2001-04-01), None
Tohoku Pioneer Corporation
Vu David
Westerman Hattori Daniels & Adrian LLP
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