Color tunable organic electroluminescent light source
First Claim
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1. A method of making a light emitting device, comprising:
- forming an array of OLEDsincluding a first and a second set;
electrically connecting the first set of OLEDs which emit light of a first color to a power source;
electrically connecting the second set of OLEDs which emit light of a different second color to the same power source; and
forming a layer of scattering medium over the array of OLEDs;
the method further comprising mounting the array of individual OLEDs on a common substrate;
wherein the step of forming the array of OLEDs comprising forming each OLED and forming the array of OLEDs, andwherein the step of forming each OLED comprises;
forming a transparent electrode over a first substrate;
forming a polymer or molecular organic light emitting layer over the transparent electrode;
forming a metal electrode over the organic light emitting layer;
forming a sealing member above the metal electrode;
removing a portion of the organic light emitting layer above the transparent electrode to expose a first portion of a top surface of the transparent electrode;
forming a first metal device contact over the sealing member, which contacts the first portion of the top surface of the transparent electrode;
forming a second metal device contact over the sealing member, which contacts a top surface of the metal electrode; and
wherein the step of forming the array comprises;
forming an adhesive layer over the mounting substrate;
attaching each OLED over the adhesive layer;
forming electrical contacts through the mounting substrate and the adhesive layer which contact the first and second device contacts; and
forming the layer of scattering medium over the first substrate.
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Abstract
A light emitting device is provided. The light emitting device contains an array of organic light emitting diodes (OLEDs) emitting a plurality of colors, and a layer of scattering media above the light emitting surface of the OLED array. The emission color of the OLEDs may be tuned by applying different power to different sets of OLEDs. The scattering media mixes the colors from each set of OLEDs, such that the device light output has a white color having a desired color temperature.
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Citations
4 Claims
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1. A method of making a light emitting device, comprising:
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forming an array of OLEDsincluding a first and a second set;
electrically connecting the first set of OLEDs which emit light of a first color to a power source;
electrically connecting the second set of OLEDs which emit light of a different second color to the same power source; and
forming a layer of scattering medium over the array of OLEDs;
the method further comprising mounting the array of individual OLEDs on a common substrate;
wherein the step of forming the array of OLEDs comprising forming each OLED and forming the array of OLEDs, and wherein the step of forming each OLED comprises; forming a transparent electrode over a first substrate;
forming a polymer or molecular organic light emitting layer over the transparent electrode;
forming a metal electrode over the organic light emitting layer;
forming a sealing member above the metal electrode;
removing a portion of the organic light emitting layer above the transparent electrode to expose a first portion of a top surface of the transparent electrode;
forming a first metal device contact over the sealing member, which contacts the first portion of the top surface of the transparent electrode;
forming a second metal device contact over the sealing member, which contacts a top surface of the metal electrode; and
wherein the step of forming the array comprises; forming an adhesive layer over the mounting substrate;
attaching each OLED over the adhesive layer;
forming electrical contacts through the mounting substrate and the adhesive layer which contact the first and second device contacts; and
forming the layer of scattering medium over the first substrate. - View Dependent Claims (2, 3, 4)
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Specification