Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Reexamination Certificate
2006-04-18
2006-04-18
Patel, Vip (Department: 2879)
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
C313S506000
Reexamination Certificate
active
07030555
ABSTRACT:
An organic EL cell is formed to satisfy the expression (1): B0<Bθin which B0is a normal luminance intensity of luminescence radiated from a light extraction surface to an observer side, and Bθis a luminance intensity of the luminescence at an angle of 50° to 70°. A region for disturbing an angle of reflection/refraction of light is provided in an optical path in which the luminescence is output from said emitting layer to the observer side through said transparent electrode. As the region, an anisotropic scattering resin layer containing a light-transmissive resin, and micro domains dispersed/distributed in the light-transmissive resin and different in birefringence characteristic may be formed substantially without interposition of any air layer in an optical path in which the luminescence is output from the emitting layer to the observer side through the transparent electrode. At least one kind of luminescent material is contained in the anisotropic scattering resin layer or between the anisotropic scattering resin layer and the emitting layer so that the luminescent material generates fluorescence or phosphorescence when the luminescent material absorbs the luminescence radiated from the emitting layer as an excitation light source.
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Juni Noriyuki
Miyatake Minoru
Nakamura Toshitaka
Nitto Denko Corporation
Patel Vip
Sughrue & Mion, PLLC
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