OLED device having improved output and contrast with light-scattering layer and contrast-enhancement layer
First Claim
1. An organic light-emitting diode (OLED) device, comprising:
- an OLED formed on a substrate having a first electrode formed over the substrate, a second electrode formed over the first electrode, and one or more light-emitting organic material layers formed between the electrodes, wherein at least one of the first or second electrodes is transparent, the organic material layer(s) having a first optical index, and wherein at least one of the first or second electrodes is patterned to define independently controllable light-emitting areas;
a cover formed over the OLED and wherein the cover or substrate is transparent and has a second optical index and the light is emitted through the transparent cover or substrate;
a light-scattering layer formed between the cover and substrate for scattering light;
a low-index element having an optical index lower than the first and second optical indices formed between the scattering layer and the transparent cover or substrate; and
a contrast-enhancement layer comprising a plurality of alternating light-absorbing portions and light-transmissive portions formed in the layer located between the light-scattering layer and the transparent substrate or cover through which light is emitted, wherein a plurality of light-absorbing portions and light-transmissive portions are located in each light-emitting area.
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Accused Products
Abstract
An organic light-emitting diode (OLED) device, with an OLED formed on a substrate having a first and second electrodes and one or more light-emitting organic material layers formed between the electrodes, the organic material layer(s) having a first optical index and at least one of the electrodes patterned to define light-emitting areas; a cover formed over the OLED. The cover or substrate is transparent and has a second optical index and the light is emitted through the transparent cover or substrate; a light-scattering layer formed between the cover and substrate for scattering light; a low-index element having an optical index lower than the first and second optical indices formed between the scattering layer and the transparent cover or substrate; and a contrast-enhancement layer having a plurality of alternating light-absorbing portions and light-transmissive portions formed in the layer located between the light-scattering layer and the transparent substrate or cover through which light is emitted, wherein a plurality of light-absorbing portions and light-transmissive portions are located in each light-emitting area.
108 Citations
20 Claims
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1. An organic light-emitting diode (OLED) device, comprising:
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an OLED formed on a substrate having a first electrode formed over the substrate, a second electrode formed over the first electrode, and one or more light-emitting organic material layers formed between the electrodes, wherein at least one of the first or second electrodes is transparent, the organic material layer(s) having a first optical index, and wherein at least one of the first or second electrodes is patterned to define independently controllable light-emitting areas; a cover formed over the OLED and wherein the cover or substrate is transparent and has a second optical index and the light is emitted through the transparent cover or substrate; a light-scattering layer formed between the cover and substrate for scattering light; a low-index element having an optical index lower than the first and second optical indices formed between the scattering layer and the transparent cover or substrate; and a contrast-enhancement layer comprising a plurality of alternating light-absorbing portions and light-transmissive portions formed in the layer located between the light-scattering layer and the transparent substrate or cover through which light is emitted, wherein a plurality of light-absorbing portions and light-transmissive portions are located in each light-emitting area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification
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- Resources
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Current AssigneeGlobal OLED Technology LLC (LG Display Co., Ltd.)
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Original AssigneeEastman Kodak Company
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InventorsTutt, Lee W., Cok, Ronald S.
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Primary Examiner(s)Williams; Joseph L
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Application NumberUS11/297,196Publication NumberTime in Patent Office1,104 DaysField of Search313504-512, 313/112, 445 23- 25US Class Current313/506CPC Class CodesH10K 50/854 comprising scattering meansH10K 50/865 comprising light absorbing ...H10K 59/877 comprising scattering meansH10K 59/8792 comprising light absorbing ...
