US 12,169,058 B2
Light-emitting module and planar light source having the same
Yoshikazu Matsuda, Anan (JP)
Assigned to Nichia Corporation, Anan (JP)
Filed by NICHIA CORPORATION, Anan (JP)
Filed on Dec. 9, 2021, as Appl. No. 17/546,930.
Claims priority of application No. 2020-211355 (JP), filed on Dec. 21, 2020.
Prior Publication US 2022/0196230 A1, Jun. 23, 2022
Int. Cl. F21V 23/00 (2015.01); F21Y 105/16 (2016.01); F21Y 115/10 (2016.01); H01L 25/075 (2006.01); H01L 27/15 (2006.01); H05B 45/30 (2020.01); H05B 45/39 (2020.01); H05B 45/42 (2020.01)
CPC F21V 23/004 (2013.01) [H01L 27/156 (2013.01); H05B 45/30 (2020.01); H05B 45/42 (2020.01); F21Y 2105/16 (2016.08); F21Y 2115/10 (2016.08); H01L 25/0753 (2013.01); H05B 45/39 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A light-emitting module, comprising:
a first terminal;
a second terminal;
a first light source connected between the first terminal and the second terminal;
a second light source and a third light source connected between the first terminal and the second terminal, in anti-parallel with the first light source;
a switching circuit; and
a control circuit to control the switching circuit, causing a first voltage to be applied to the first terminal and a second voltage lower than the first voltage to be applied to the second terminal during a first time period, and causing a third voltage to be applied to the first terminal and a fourth voltage higher than the third voltage to be applied to the second terminal during a second time period prior or subsequent to the first time period,
the first, second, and third light sources being aligned in a first direction along a light-emitting surface, with the first light source between the second light source and the third light source.