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US 11,710,807 B2Granted
Light emitting device
AssigneeNichia Corporation
InventorsKenji Kawano, Atsushi Yamamoto
Life of this patent
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Abstract
A light emitting device includes a light emitting element adapted to emit blue light, quantum dots that absorb part of the blue light emitted from the light emitting element to emit green light, and at least one of a KSF phosphor adapted to absorb part of the blue light emitted from the light emitting element to emit red light and a MGF phosphor adapted to absorb part of the blue light emitted from the light emitting element to emit red light.
Claims12
A light emitting device, comprising:
- a light emitting element adapted to emit blue light;
- a sealing resin covering the light emitting element;
- a phosphor included in the sealing resin and adapted to absorb a portion of the blue light emitted from the light emitting element to emit red light;
- and
- a quantum dot layer disposed outside the sealing resin, the quantum dot layer including quantum dots adapted to absorb a portion of the blue light emitted from the light emitting element to emit green light having an emission peak wavelength of 510 nm to 560 nm,
- wherein the phosphor has a half-width of an emission peak of 35 nm or less,
- wherein the quantum dots have an average particle size of 1 nm to 20 nm,
- wherein the quantum dot layer is sheet-shaped and is spaced apart from the sealing resin, and
- wherein a light guide plate is disposed between the sealing resin and the quantum dot layer.
6 more elements
Dependencies are inferred from the claim text.