White light led with multicolor light-emitting layers of macroscopic structure widths, arranged on a light diffusing glass
First Claim
1. An electroluminescent light emission device suitable for use as a white light source, comprising:
- a transparent substrate formed as a diffusing screen;
at least one first transparent electrode layer applied to the substrate;
a plurality of electroluminescent light emitter layers arranged laterally next to one another on the at least first transparent electrode layer and from whose emission radiation white light can be generated by additive color mixing;
at least one second electrode layer applied to the plurality of light emitter layers;
the lateral extend and/or a lateral distance of the light emitter layers amounting to at least 100 μ
m; and
the diffusing screen being an opal glass screen or a plastic substrate with embedded scattering centers and its thickness being a multiple of the average scattering length of the radiation beams to be mixed of the light emitter layers and being at least as large as the distance between the light emitter layers, whereby the radiation beams emitted by the light emitter layers are at least partly superposed on a light exit surface of the substrate.
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Accused Products
Abstract
Multicolor-emitting, for example organic light emitter layers (1, 2, 3), the emission spectra of which can be mixed to form white light, are arranged laterally next to one another on a first transparent electrode layer (7). The light emitter layers (1, 2, 3) are preferably in strip form and have, for the purpose of simplifying production, macroscopic dimensions that can be resolved by the eye. The thickness of the light-scattering substrate (4) is therefore chosen such that the radiation beams emitted by the light emitter layers (1, 2, 3) are at least partly superposed on the light exit surface of the substrate (4), thereby giving rise to the optical impression of a white light source. (FIG. 1 for publication with the abstract)
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Citations
12 Claims
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1. An electroluminescent light emission device suitable for use as a white light source, comprising:
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a transparent substrate formed as a diffusing screen;
at least one first transparent electrode layer applied to the substrate;
a plurality of electroluminescent light emitter layers arranged laterally next to one another on the at least first transparent electrode layer and from whose emission radiation white light can be generated by additive color mixing;
at least one second electrode layer applied to the plurality of light emitter layers;
the lateral extend and/or a lateral distance of the light emitter layers amounting to at least 100 μ
m; and
the diffusing screen being an opal glass screen or a plastic substrate with embedded scattering centers and its thickness being a multiple of the average scattering length of the radiation beams to be mixed of the light emitter layers and being at least as large as the distance between the light emitter layers, whereby the radiation beams emitted by the light emitter layers are at least partly superposed on a light exit surface of the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification