Active matrix electroluminescent cell design

Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device

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3151691, 313509, H01J 900

Patent

active

054632790

ABSTRACT:
An electroluminescent device comprises a plurality of layers including at least a transparent electrode layer, a circuit layer, and typically three layers including an electroluminescent layer sandwiched between front and rear dielectric layers, all three layers thereof disposed between the circuit layer and the transparent electrode layer. The circuit layer further comprises a first gating device coupled to a data line and a select line and having an output coupled to an input of a charge storage device. The charge storage device has a terminal connected to a first ground layer. A second gating device comprises a transistor operating in a breakdown region. The transistor has a gate coupled to the input to the charge storage device and has a first terminal coupled to a second ground layer and a second terminal coupled to a pixel electrode. The transparent electrodes are carrying an electrical signal such that upon activation of the second gating device an electric field is generated between the transparent electrode layer and the pixel electrode so as to cause the electroluminescent layer to emit light.

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