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US 10,371,875 B2Granted
Display device having a color conversion layer
AssigneeSamsung Display Co., Ltd.
InventorsDong Uk Kim, Min Ki Nam, Hae Il Park, Jun Han Lee
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Abstract
A display device may include a substrate and a plurality of color conversion units on the substrate. Each of the plurality of color conversion units may include a photonic crystal layer having at least two layers having different refractive indices alternately stacked, and a wavelength shifter dispersed in at least one of the at least two layers.
Claims17
A display device, comprising:
- a substrate;
- and
- a plurality of color conversion units on the substrate,
- wherein the plurality of color conversion units includes a green color conversion unit to absorb blue light and emit green light, and a red color conversion unit to, absorb blue light and emit red light;
- wherein each of the green color conversion unit and the red color conversion unit includes:
- a photonic crystal layer including photonic crystals having periodicity in a single direction in which two layers having different refractive indices alternately stacked, the two layers including a first layer having a first refractive index and a second layer having a second refractive index;
- and
- a wavelength shifter dispersed in both the first and second layers
- when the first layer has a thickness of d1 and a refractive index of n1, and a wavelength of light emitted from the photonic crystal layer is λ, the following equation is satisfied:
- n1×d1=m1×(λ/2), where m1 is a natural number;
- and
- when the second layer has a thickness of d2 and a refractive index of n2, and a wavelength of light emitted from the photonic crystal layer is λ, the following equation is satisfied:
- n2×d2=m2×(λ/2), where m2 is a natural number.
10 more elements
A liquid crystal display, comprising:
- a first substrate;
- a plurality of color conversion units on the first substrate;
- a second substrate opposite the first substrate;
- and
- a liquid crystal layer between the first and second substrates,
- wherein the plurality of color conversion units includes a green color conversion unit to absorb blue light and emit green light;
- and a red color conversion unit to absorb blue light and emit red light;
- wherein each of the green color conversion unit and the red color conversion unit includes:
- a photonic crystal layer including photonic crystals having periodicity in a single direction in which two layers having different refractive indices alternately stacked, the two layers including a first layer having a first refractive index and a second layer having a second refractive index;
- and
- a wavelength shifter dispersed in both the first and layers,
- when the first layer has a thickness of d1 and a refractive index of n1, and a wavelength of light emitted from the photonic crystal layer is λ, the following equation is satisfied:
- n1×d1=m1×(λ/2), where m1 is a natural number;
- and
- when the second layer has a thickness of d2 and a refractive index of n2, and a wavelength of light emitted from the photonic crystal layer is λ, the following equation is satisfied:
- n2×d2=m2×(λ/2), where m2 is a natural number.
13 more elements
Dependencies are inferred from the claim text.