Lighting apparatus
AssigneeNichia Corporation
InventorDaisuke Iwakura
Life of this patent
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Abstract
A lighting apparatus includes light emitting elements having an emission peak wavelength of 400 to 510 nm, a first phosphor having an emission peak wavelength of 485 to 700 nm, a second phosphor having an emission peak wavelength of 510 to 590 nm, a third phosphor having an emission peak wavelength of 600 to 700 nm, and a color filter having transmittance for light with a wavelength of 600 to 730 nm that is 80% or more and transmittance for light with a wavelength of 410 to 480 nm that is 3% or more and 50% or less. The color filter transmits a part of light emitted from the first phosphor, at least a part of light emitted from the second phosphor, and at least a part of light emitted from the third phosphor. Light transmitted through the color filter is emitted to the outside.
Claims16
A lighting apparatus comprising:
- a first light emitting element having an emission peak wavelength of 400 nm or more and 510 nm or less;
- a first phosphor disposed in such a position that light emitted by the first light emitting element is incident on the first phosphor, wherein the first phosphor is excited by the light, the first phosphor has an emission peak wavelength of 485 to 700 nm;
- and
- a color filter that
- is red,
- is disposed in a position separate from the first phosphor such that a first light that includes light emitted from the first light emitting element and light emitted from the first phosphor is incident on the color filter,
- transmits a part of the first light, absorbs a part of light with a wavelength of 410 nm or more and 480 nm or less contained in the first light and
- absorbs a part of light with a wavelength of 500 nm or more and 550 nm or less contained in the first light,
- wherein the lighting apparatus emits light transmitted through the color filter, and a component of the first light, after being transmitted through the color filter, is within a chromaticity range of 0.500≥x≥0.310, y≤0.150+0.640x, y≥0.050+0.750x, and 0.440≥y≥0.382 in chromaticity coordinates of JIS Z8701.
Dependencies are inferred from the claim text.