Organic electroluminescent display device method and apparatus

Details Organic electroluminescent display device method and apparatus Organic electroluminescent display device method and apparatus

2005-02-25

2010-10-05

Kumar, Srilakshmi K (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Segmented display elements

C345S046000, C345S076000, C315S169300

Reexamination Certificate

active

07808451

ABSTRACT:
An organic electroluminescent display device connected by a blocking diode in series to an organic light-emitting diode (OLED). Each pixel or subpixel of the electroluminescent display device comprises an OLED, a blocking diode to prevent the OLED from being reversed biased, a rectification diode to isolate the column electrode from unselected rows and a capacitor as a memory device. The charge stored in each memory capacitor may be increased by the blocking diode in series with each OLED. A frame period of the display device is divided into sub-frames that have address and light emission periods. Current mode data programming is used to address the device in each sub-frame. A ramp waveform is applied to the row electrode during the light emission period, to cause the capacitor to discharge through the OLED and control the forward current level.

REFERENCES:
patent: 5828181 (1998-10-01), Okuda
patent: 6084579 (2000-07-01), Hirano
patent: 6861810 (2005-03-01), Rutherford
patent: 2001/0001050 (2001-05-01), Miyashita et al.
patent: 2001/0054711 (2001-12-01), Numao

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