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US 7,969,085 B2Granted
Color-change material layer
AssigneeGlobal OLED Technology LLC
InventorRonald S. Cok
Life of this patent
Estimating the term…
Abstract
A color-change material layer comprising: a color-change material that converts light of a second frequency range higher than a first frequency range to light of the first frequency range; and a transparent material having a refractive index of at least 1.6 intermixed with the color-change material, wherein the layer is substantially non-scattering to light of the first frequency range.
Claims13
An OLED device including,
- a substrate;
- a first electrode;
- a transparent second electrode;
- an organic light emitting layer disposed between the first electrode and the transparent second electrode;
- and
- wherein the transparent second electrode comprises:
- color-change particles that convert light of a second frequency range higher than a first frequency range to light of the first frequency range;
- a conductive transparent material having a refractive index of at least 1.6 intermixed with the color-change particles,
- wherein the color-change particles are formed at a higher concentration on the side of the transparent second electrode away from the organic light emitting layer and at a lower concentration at the side of the transparent second electrode closest to the organic light emitting layer, and
- wherein the transparent second electrode is substantially non-scattering to light of the first frequency range.
7 more elements
An OLED device comprising:
- a substrate;
- one or more color filters formed above the substrate and transmitting light having a first frequency range;
- a first transparent electrode formed over the color filters comprising color-change particles that convert light of a second frequency range higher than the first frequency range to light of the first frequency range, and a conductive transparent material having a refractive index of at least 1.6 intermixed with the color-change particles, wherein the first transparent electrode is substantially non-scattering to light of the first frequency range and the color-change particles are formed at a higher concentration on one side of the first transparent electrode and at a lower concentration at the other side of the first transparent electrode;
- one or more layers of organic light-emitting materials which emits light in at least the second frequency range in response to a current passed there-through formed over the first transparent electrode;
- and
- a second electrode formed over the one or more layers of light-emitting materials;
- and
- wherein the OLED device comprises a plurality of differently colored light-emitting elements formed over different locations on the substrate, each differently colored light-emitting element comprises a differently colored color filter and corresponding color-change particles and wherein the different colors include at least two of red, green or blue.
5 more elements
Dependencies are inferred from the claim text.