Color electroluminescent display devices

Details Color electroluminescent display devices Color electroluminescent display devices

2007-07-10

2007-07-10

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

C345S076000, C345S083000

Reexamination Certificate

active

10559359

ABSTRACT:
A colour active matrix electroluminescent (EL) display device has an array of pixels (10) comprising sets of red, green and blue emitting pixels, each of which pixels comprises an EL display element (20), a drive transistor (22) for driving a current through the display element, a storage capacitor (24) for storing a voltage used for addressing the drive transistor, and a discharge photosensitive element (40, 42) for discharging the storage capacitor in dependence on the light output of the display element. The discharge photosensitive elements (42) in the set of blue pixels comprise lateral photosensitive thin film devices, such as lateral thin film transistors or gated or ungated lateral photodiode devices, while the discharge photosensitive elements (40) in the set of red pixels, and preferably the set of green pixels as well, comprise vertical p i n photodiodes (40). The selection of the photosensitive elements in this manner leads to enhanced colour-related photo-sensitivity, and thus improved display device performance.

REFERENCES:
patent: 6515428 (2003-02-01), Yeh et al.
patent: 6812650 (2004-11-01), Yasuda et al.
patent: 2003/0234759 (2003-12-01), Bergquist
patent: 2004/0017162 (2004-01-01), Sato et al.
patent: 2005/0030268 (2005-02-01), Zhang et al.

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