Lighting apparatus
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.
1. A lighting apparatus comprising:
a first light emitting element and a second light emitting element having an emission peak wavelength of 400 nm or more and 510 nm or less;
a color filter that is red;
a plate-like phosphor layer disposed in a position between the first light emitting element and the color filter such that light emitted by the first light emitting element is incident on the phosphor layer, wherein the phosphor layer contains a first phosphor excited by the light, the first phosphor has an emission peak wavelength of 600 nm or more and 700 nm or less, a second phosphor disposed in such a position that light emitted by the second light emitting element is incident on the second phosphor, the second phosphor is excited by the light, the second phosphor has an emission peak wavelength of 485 nm or more and 700 nm or less, wherein
the color filter is disposed in such a position that a first light that includes light emitted from the first light emitting element and light emitted from the first phosphor, and a second light that includes light emitted from the second light emitting element and light emitted from the second phosphor, are incident on the color filter, and
a component of the second 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.
2. The lighting apparatus according to claim 1 , wherein the phosphor layer comprises resin containing the first phosphor disposed on a substrate.
3. The lighting apparatus according to claim 1 , wherein the phosphor layer is a member wherein the first phosphor is sintered together with an inorganic material.
4. The lighting apparatus according to claim 1 , further comprising a frame body surrounding the first light emitting element and in contact with the phosphor layer.
5. The lighting apparatus according to claim 1 , wherein, the color filter transmits a part of the second light, absorbs a part of light with a wavelength of 410 nm or more and 480 nm or less contained in the second light, and absorbs a part of light with a wavelength of 500 nm or more and 550 nm or less contained in the second light.
6. The lighting apparatus according to claim 1 , wherein at least a part of the color filter is within a chromaticity range of y≤0.335 and z≤0.008 in chromaticity coordinates of JIS Z8701.
7. The lighting apparatus according to claim 1 , further comprising:
a third light emitting element having an emission peak wavelength of 400 nm or more and 510 nm or less; and
a third phosphor disposed in such a position that light emitted by the third light emitting element is incident on the third phosphor, the third phosphor is excited by the light, the third phosphor has an emission peak wavelength of 510 nm or more and 590 nm or less, wherein
the color filter is disposed in such a position that a third light that includes light emitted from the third light emitting element and light emitted from the third phosphor is incident on the color filter, and the color filter transmits at least a part of the third light.
8. The lighting apparatus according to claim 7 , wherein the third light after being transmitted through the color filter is within a chromaticity range of 0.429≥y≥0.398 and z≤0.007 in chromaticity coordinates of JIS Z8701.
9. The lighting apparatus according to claim 1 , wherein the color filter is disposed so as to cover over the first light emitting element in a top view.
10. The lighting apparatus according to claim 1 , wherein, the color filter has transmittance for light with a wavelength of 600 nm or more and 730 nm or less that is 80% or more.
11. An outer lens which is provided for the lighting apparatus according to claim 1 .
12. An automobile comprising the lighting apparatus according to claim 1 .
13. A rear combination lamp comprising the lighting apparatus according to claim 1 .