LED device having improved light output

Details LED device having improved light output LED device having improved light output

2007-09-17

2010-12-21

Hines, Anne M (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S504000

Reexamination Certificate

active

07855508

ABSTRACT:
A white light-emitting microcavity light-emitting diode device including a reflective electrode and a semi-transparent electrode formed over a substrate and an unpatterned white-light-emitting layer formed between the reflective electrode and the semi-transparent electrode. The reflective electrode, semi-transparent electrode, and unpatterned white-light-emitting layer form an optical cavity, and either the reflective or semi-transparent electrode is patterned to form independently-controllable light-emitting sub-pixel elements. Color filters are formed over a side of the semi-transparent electrodes opposite the unpatterned white light-emitting-layer in correspondence with the independently-controllable light-emitting elements to form colored sub-pixels. One of the independently-controllable light-emitting element has at least two commonly-controlled portions that together emit substantially white light to form a white sub-pixel. The optical cavity of one or more of the commonly-controlled portions of the white sub-pixel comprises optical microcavities tuned to emit light at a different complementary wavelength at an emission angle.

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Kashiwabara, Mitsuhiro et al., “29.5L: Late-News Paper: Advanced AM-OLED Display Based on White Emitter with Microcavity Structure,” 2004 SID International Symposium, Seattle, WA, May 25-27, 2004, [SID International Symposium], San Jose, CA : SID, US, vol. XXXV, May 25, 2004, pp. 1017-1019.

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