Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device
Reexamination Certificate
2006-05-02
2006-05-02
Dinh, Trinh V. (Department: 2821)
Electric lamp and discharge devices: systems
Plural power supplies
Plural cathode and/or anode load device
C315S169100, C315S169200, C315S169400, C345S084000, C345S076000, C345S082000
Reexamination Certificate
active
07038393
ABSTRACT:
A drive device for a light-emitting display panel, having the more extended light-emitting life of an EL element, is provided. Drive switches SX1to SXn select a reverse direction voltage −V immediately after starting of scanning to supply the voltage −V to all of EL elements in a scanning state. Subsequently, through the switches SX1to SXn, constant current sources I1to In are connected to data lines to be controlled for light emitting, and, a forward voltage +V1(a voltage equal to or smaller than a light-emitting threshold one) is applied to data lines which do not contribute to light emitting. Thereby, the forward voltage is applied to the EL elements in a scanning state.
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Murakata Masaki
Ogoshi Kunizo
Yuki Toshinao
Dinh Trinh V.
Ho Binh Van
Tohoku Pioneer Corporation
Westerman, Hattori, Daniels & Adrian , L.L.P.
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