Electroluminescent device having increased brightness and resolu

Details Electroluminescent device having increased brightness and resolu Electroluminescent device having increased brightness and resolu

1998-07-30

2000-06-13

Patel, Vip

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

313113, 313117, 313506, 313509, 313517, H01J 162, H01J 6304

Patent

active

06075317&

ABSTRACT:
An electroluminescent device in accordance with the present invention includes a plurality of pixel electrodes disposed on a dielectric layer and coupled to control circuitry. An electroluminescent stack and a transparent electrode are included wherein the electroluminescent stack is disposed between the transparent electrode and the plurality of pixel electrodes. A plurality of guides are disposed between each of the pixel electrodes for guiding light from the electroluminescent stack when the pixel electrodes are activated by the control circuitry and reducing internal reflections of light within the electroluminescent stack. Another device and method include a dielectric layer disposed between the pixel electrodes for absorbing light and reducing a threshold voltage of the stack. A method for fabricating an electroluminescent device includes the steps of providing a substrate having an integrated control circuit formed therein, forming an interlevel dielectric layer on the substrate, forming pixel electrodes on the interlevel dielectric layer, the pixel electrodes being coupled to the control circuit, forming an electroluminescent stack on the pixel electrodes, forming a transparent electrode over the electroluminescent stack and forming a plurality of guides disposed between the pixel electrodes for guiding light from the electroluminescent stack when the pixel electrodes are activated by the control circuit and reducing internal reflections of light within the electroluminescent stack.

REFERENCES:
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patent: 5273774 (1993-12-01), Karam et al.
patent: 5463279 (1995-10-01), Khormaei
patent: 5491378 (1996-02-01), Lee et al.
patent: 5910706 (1999-06-01), Stevens et al.
Khormaei et al., High-Resolution Active-Matrix Electroluminescent Display, SID 94 Digest, ISSN0097-0966X/94/2501-0137, pp. 137-139.
Khormaei et al., A 1280 x 1024 Active-Matrix EL Display, SID 95 Digest, ISSN0097-0966X/95/2601-0891, pp. 891-893.
Arbuthnot et al., A 2000-Ipi Active-Matrix EL Display, SID 96 Digest, ISSN0097-0966X/96/2701-0374, pp. 374-377.

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