US 12,241,611 B2
Lighting apparatus
Daisuke Iwakura, Komatsushima (JP)
Assigned to NICHIA CORPORATION, Anan (JP)
Filed by NICHIA CORPORATION, Anan (JP)
Filed on May 19, 2023, as Appl. No. 18/320,344.
Application 18/320,344 is a division of application No. 17/369,521, filed on Jul. 7, 2021, granted, now 11,692,683.
Application 17/369,521 is a division of application No. 16/260,957, filed on Jan. 29, 2019, granted, now 11,085,605, issued on Aug. 10, 2021.
Claims priority of application No. 2018-013643 (JP), filed on Jan. 30, 2018.
Prior Publication US 2023/0288042 A1, Sep. 14, 2023
Int. Cl. F21S 43/20 (2018.01); B60Q 1/34 (2006.01); B60Q 1/44 (2006.01); C09K 11/64 (2006.01); C09K 11/77 (2006.01); F21S 43/16 (2018.01); F21V 9/08 (2018.01); F21V 9/32 (2018.01); F21V 9/40 (2018.01); H01L 25/075 (2006.01); H01L 33/48 (2010.01); H01L 33/50 (2010.01); H01L 33/60 (2010.01); F21W 103/20 (2018.01); F21W 103/35 (2018.01)
CPC F21S 43/255 (2018.01) [B60Q 1/34 (2013.01); B60Q 1/44 (2013.01); C09K 11/641 (2013.01); C09K 11/7706 (2013.01); F21S 43/16 (2018.01); F21V 9/08 (2013.01); F21V 9/32 (2018.02); F21V 9/40 (2018.02); H01L 25/0753 (2013.01); H01L 33/486 (2013.01); H01L 33/502 (2013.01); H01L 33/507 (2013.01); H01L 33/60 (2013.01); B60Q 2400/20 (2013.01); F21W 2103/20 (2018.01); F21W 2103/35 (2018.01)] 13 Claims
OG exemplary drawing
 
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.