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White light led with multicolor light-emitting layers of macroscopic structure widths, arranged on a light-diffusing glass

A technology of electroluminescence and light-emitting devices, which is applied in the direction of electroluminescence light sources, lighting devices, light sources, etc., and can solve the problems of indistinguishable strip structures, small width of light emitter layers, and complicated production of components.

Inactive Publication Date: 2008-06-25
NOVALED GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a disadvantage of the component described in this embodiment is that the width of the strips of the light emitter layer is so small that the strip-like structures cannot be distinguished when viewed normally by the human eye, which leads to relatively complex production of the component

Method used

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  • White light led with multicolor light-emitting layers of macroscopic structure widths, arranged on a light-diffusing glass
  • White light led with multicolor light-emitting layers of macroscopic structure widths, arranged on a light-diffusing glass
  • White light led with multicolor light-emitting layers of macroscopic structure widths, arranged on a light-diffusing glass

Examples

Experimental program
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Embodiment Construction

[0023] The figures show an embodiment comprising three variegated emitting light emitter layers. The light emitter layer consists of organic LEDs.

[0024] A first transparent electrode layer 7 is applied to a light-scattering substrate 4, which can consist, for example, of an opal glass screen or a plastic substrate with embedded scattering centers. The electrode layer 7 can be composed of, for example, an ITO (indium tin oxide) layer.

[0025] The light emitter layers 1 , 2 and 3 are then applied successively to the first electrode layer 7 in the form of strips. The light emitter layers 1 , 2 and 3 in each case comprise a layer order of n- and p-doped organic materials, so that within this layer order a pn junction is formed. The organic materials are chosen such that the first light emitter layer 1 has an emission maximum at wavelengths in the red spectral range, the second light emitter layer 2 has an emission maximum at wavelengths in the green spectral range, and the t...

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Abstract

In a white light LED, multicolor-emitting light emitter layers of macroscopic structure widths, whose emission spectra can be mixed to form white light, are arranged laterally next to one another on a first transparent electrode layer. The light emitter layers 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 a light-scattering substrate is chosen such that the radiation beams emitted by the light emitter layers are at least partly superposed on the light exit surface of the light-scattering substrate, thereby creating the optical impression of a white light source.

Description

technical field [0001] The present invention relates generally to electroluminescent lighting devices and related fields, and more particularly to electroluminescent lighting devices that can be used as white light sources. Background of the invention [0002] In the past, efforts have been made to develop various concepts to replace conventional white light sources based on incandescent or halogen lamps. [0003] State-of-the-art concepts are based on semiconductor LEDs based on GaN or InGaN, which are at least partially embedded in a transparent casting resin material containing converter substances for at least partial wavelength conversion of the light emitted by the LED. In this case, the LED preferably has a plurality of light-emitting regions, which, in terms of energy, produce a relatively broad-band light emission spectrum over the emission spectrum of the converter substance. Light emitted by the GaN-LED in the blue or UV wavelength range is at least partially con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/00H01L51/50H05B33/02H01L25/075H01L27/15H01L27/32H05B33/12H05B33/26
CPCH01L2924/0002H01L51/5036H01L51/5268H01L27/3211H01L25/0753H01L27/153H10K59/35H10K50/125H10K50/854H01L2924/00
Inventor K·莱奥
Owner NOVALED GMBH