Organic EL display device having adjustable offset voltage

Details Organic EL display device having adjustable offset voltage Organic EL display device having adjustable offset voltage

2005-03-22

2005-03-22

Vu, David (Department: 2828)

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

C315S169300, C345S076000, C345S077000

Reexamination Certificate

active

06870322

ABSTRACT:
An organic EL display device which individually controls the amount of current of organic EL elements, which are arranged in a matrix of pixels, according to an input image signal, comprising total current detection circuitry for detecting the total current flowing to all the organic EL elements arranged in the pixel matrix, offset voltage setting circuitry for determining an offset voltage to offset the input image signal so as to apply a voltage which causes the current to start flowing to the organic EL elements according to a black level of the input image signal, and offset voltage control circuitry for controlling the offset voltage, which is responsive to the offset voltage setting circuitry, according to the total current detected by the total current detection circuitry.

REFERENCES:
patent: 6667580 (2003-12-01), Kim et al.
patent: 6690117 (2004-02-01), Komiya

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