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US 2018/0019384 A1Published application
Light emitting device and method of manufacturing the same, and display device
AssigneeNichia Corporation
InventorKoji ABE
Life of this patent
Estimating the term…
Abstract
A light emitting device includes a light emitting element, a light-transmissive member covering the light emitting element, a fluorescent material contained in the light-transmissive member, and a multilayer film disposed on the light-transmissive member and including alternatively layered two types of films of different refractive indices, in which the two types of films are aggregated nano-particles of TiO2 and aggregated nano-particles of SiO2.
Claims20
A light emitting device comprising:
- a light emitting element;
- a light-transmissive member covering the light emitting element and configured to allow light from the light emitting element to pass through;
- a fluorescent material contained in the light-transmissive member to covert wavelength of light from the light emitting element;
- and
- a multilayer film in which two or more types of films of aggregated nano-particles are layered, the multilayer film comprising a first film of aggregated first nano-particles and a second film of aggregated second nano-particles that has a refractive index different from a refractive index of the first nano-particles.
2 more elements
A method of manufacturing a light emitting device comprising:
- providing a light emitting device, the light emitting device comprising a light emitting element covered by a light-transmissive member that is configured to allow light from the light emitting element to pass through, and a fluorescent material to convert wavelength of light from the light emitting element, the fluorescent material being contained in the light-transmissive member;
- and
- disposing a multilayer film on the light-transmissive member, comprising;
- applying a first slurry comprising first nano-particles dispersed in a first solvent on the light-transmissive member to dispose a first film of aggregated first nano-particles;
- applying a second slurry comprising second nano-particles dispersed in a second solvent on the first film to dispose a second film, the second nano-particles having a refractive index different from a refractive index of the first nano-particles;
- and
- repeating the disposing of the first film and the second film to dispose a multilayer film having a predetermined number of layered films.
4 more elements
A light emitting device comprising:
- a light emitting element;
- a light-transmissive member covering the light emitting element and allowing light from the light emitting element to pass through;
- a fluorescent material contained in the light-transmissive member to convert wavelength of light from the light emitting element;
- and
- a multilayer film disposed on the light-transmissive member;
- wherein, when a peak wavelength of light emitted from the light emitting element is indicated as λ, at least one film in the multilayer film satisfies a relationship n1·d1=(2N−1)/4·λ (wherein d1 is a film thickness, n1′ is a refractive index at the peak wavelength, and N is a natural number), and at least one film in the multilayer film satisfies a relationship n2·d2=(2N−1)/4·λ (wherein d2′ is a film thickness, n2 is a refractive index at the peak wavelength, and N is a natural number which is n2 ≠n1).
3 more elements
A light emitting device comprising:
- a light emitting element;
- a light-transmissive member covering the light emitting element and allowing light from the light emitting element to pass through;
- a fluorescent material contained in the light-transmissive member to convert wavelength of light from the light emitting element;
- and
- a multilayer film disposed on the light-transmissive member;
- wherein, when a peak wavelength of light emitted from the light emitting element is indicated as λ′, at least one film in the multilayer film satisfies a relationship n1′·d1′=N/2·λ′ (wherein d1′ is a film thickness, n1′ is a refractive index at the peak wavelength, and N is a natural number), and at least one film in the multilayer film satisfies a relationship n2′·d2′=N/2·λ′ (wherein d2′ is a film thickness, n2′ is a refractive index at the peak wavelength, and N is a natural number which is n1′).
3 more elements
Dependencies are inferred from the claim text.