US 12,152,768 B2
Lighting device having improved light emission and clean air function
Masahiro Konishi, Tokyo (JP)
Assigned to Denka Company Limited, Tokyo (JP)
Appl. No. 18/574,607
Filed by Denka Company Limited, Tokyo (JP)
PCT Filed Jun. 21, 2022, PCT No. PCT/JP2022/024667
§ 371(c)(1), (2) Date Dec. 27, 2023,
PCT Pub. No. WO2023/276775, PCT Pub. Date Jan. 5, 2023.
Claims priority of application No. 2021-106401 (JP), filed on Jun. 28, 2021.
Prior Publication US 2024/0318805 A1, Sep. 26, 2024
Int. Cl. F21V 33/00 (2006.01); F21K 9/00 (2016.01); F21K 9/232 (2016.01); F21K 9/233 (2016.01); F21K 9/238 (2016.01); F21K 9/66 (2016.01); F21V 3/12 (2018.01); F21V 19/00 (2006.01); F21V 29/67 (2015.01); H01L 33/50 (2010.01); H05K 1/02 (2006.01); F21Y 113/00 (2016.01); F21Y 115/10 (2016.01)
CPC F21V 3/12 (2018.02) [F21K 9/232 (2016.08); F21K 9/238 (2016.08); F21V 19/0025 (2013.01); F21V 29/673 (2015.01); F21Y 2113/30 (2023.05); F21Y 2115/10 (2016.08)] 20 Claims
OG exemplary drawing
 
1. A lighting device comprising:
a phosphor application printed wiring board in which a phosphor layer is provided on a substrate surface;
a first light emitting unit provided in the phosphor application printed wiring board and outputting light having a peak wavelength in a wavelength region of visible light;
a second light emitting unit provided in the phosphor application printed wiring board and outputting light having a peak wavelength in a range of 315 nm to 470 nm;
a photocatalyst unit including a substance that undergoes a photocatalytic reaction with light of the second light emitting unit; and
a lighting device cover that covers the phosphor application printed wiring board,
wherein the phosphor layer is provided separately from the first light emitting unit and the second light emitting unit.