Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device
Patent
1989-04-03
1989-12-19
Griffin, Robert L.
Electric lamp and discharge devices: systems
Plural power supplies
Plural cathode and/or anode load device
3151692, 340781, 34082581, H01J 1914
Patent
active
048885231
ABSTRACT:
The present invention relates to a driving circuit of a thin film electroluminescent (EL) display, wherein a high withstand-voltage driver IC composed of a bi-directional switching element having push/pull function is connected with one or both of the scanning electrodes and the data electrodes of EL display, the bi-directional switching circuit for applying the writing voltage or the modulation voltage is applied with the pull up common line of each of the drivers IC and the pull down common line, a switch for extremely recovering, after the thin film EL element has emitted its light, the electric charge accumulated on the thin film EL display element, and a capacitor for accumulating the drawn out electric charge are disposed in the bi-directional switching circuit, and the modulation accumulation electric charge accumulated on the film EL display element after the light emission is accumulated on the capacitor, so that the modulation consumption power occupying the majority of the driving power without the damages to the conventional advantages may be reduced by 25% as compared with the conventional driving.
REFERENCES:
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patent: 4349816 (1982-07-01), Miller et al.
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patent: 4707692 (1987-11-01), Higgins et al.
Fujioka Yosihide
Harada Shigeyuki
Ohba Toshihiro
Shoji Kazuo
Griffin Robert L.
Salindong T.
Sharp Kabushiki Kaisha
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