Organic EL drive circuit and organic EL display device

Details Organic EL drive circuit and organic EL display device Organic EL drive circuit and organic EL display device

2004-12-13

2008-12-30

Philogene, Haissa (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S169100, C315S169200, C315S312000, C315S360000, C345S076000, C345S084000, C345S204000, C345S690000

Reexamination Certificate

active

07471050

ABSTRACT:
To provide an organic EL drive circuit and an organic EL display device using the organic EL drive circuit, which, when grey levels of passive matrix type organic EL elements are controlled time-divisionally, is capable of easily collecting luminance in low luminance level with low drive voltage and restricted power consumption.[Means for Resolution]An organic EL drive circuit, which has a plurality of current drive circuits for generating PWM pulse having pulse width corresponding to display data of luminance of organic EL elements and outputting a drive current for driving the organic EL elements for a time period corresponding to the PWM pulse, comprises a peak current generator circuit for generating a peak current on the drive current. The current drive circuit is provided for each of the output pins connected to the respective organic EL elements and generates the peak currents larger than the drive current corresponding to the display data when the display data value indicates a predetermined luminance or lower.

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