Light-emitting device having grating for aligning...

Details Light-emitting device having grating for aligning... Light-emitting device having grating for aligning...

2007-07-31

2007-07-31

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

C313S506000

Reexamination Certificate

active

10871753

ABSTRACT:
A light-emitting device includes a substrate, a light-emissive layer disposed over the substrate, and a grating for aligning the light-emissive layer. The grating aligns molecules of the emissive layer, so that the device emits polarised. The grating also reduces wave guiding effects in the device, so increasing the useful light output of the device. The light-emitting device may be an organic light-emitting device (OLED). The grating may align substantially the entire area of the light-emissive layer in a first direction. In this case, substantially the entire emissive area of the device will emit layer of a single polarisation. Alternatively, the grating may align a first region of the light-emissive layer in a first direction and may align a second region of the light-emissive layer in a second direction different from the first direction.

REFERENCES:
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patent: 6628068 (2003-09-01), Rorison et al.
patent: 6831407 (2004-12-01), Cok
patent: 2002/0161153 (2002-10-01), Bao et al.
patent: 2006/0034492 (2006-02-01), Siegel et al.
patent: 01-186588 (1989-07-01), None
Korean Search Report for corresponding application No. 519980961371dated Feb. 21, 2006.

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