Drive device for light-emitting display panel

Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device

Reexamination Certificate

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Details

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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patent: 6351076 (2002-02-01), Yoshida et al.
patent: 6617801 (2003-09-01), Ishizuka et al.
patent: 6707438 (2004-03-01), Ishizuka et al.
patent: 6894685 (2005-05-01), Ogusu et al.
patent: 2002/0190934 (2002-12-01), Yoshida et al.
patent: 2004/0189558 (2004-09-01), Yoshida et al.
patent: 11-8064 (1999-01-01), None

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