US 12,439,480 B2
Heating light source device, heating light source module and optical heating system
Takahiro Inoue, Tokyo (JP)
Assigned to Ushio Denki Kabushiki Kaisha, Tokyo (JP)
Filed by Ushio Denki Kabushiki Kaisha, Tokyo (JP)
Filed on Feb. 9, 2022, as Appl. No. 17/668,243.
Claims priority of application No. 2021-078972 (JP), filed on May 7, 2021.
Prior Publication US 2022/0361292 A1, Nov. 10, 2022
Int. Cl. H05B 3/00 (2006.01); F21V 29/83 (2015.01); H01L 21/67 (2006.01); H05B 3/02 (2006.01)
CPC H05B 3/0047 (2013.01) [F21V 29/83 (2015.01); H05B 3/02 (2013.01); H01L 21/67115 (2013.01); H05B 2203/032 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A heating light source device comprising:
a plurality of heating light source modules;
each of the heating light source modules further comprising;
a light-emitting element substrate having a placement surface and a back side surface, the back side surface being opposite to the placement surface;
a plurality of light-emitting elements mounted on the placement surface of the light-emitting element substrate; and
a cooling member having a first main surface on which the light-emitting element substrate is disposed and is in contact with the back side surface of the light-emitting element substrate, and a second main surface that is located opposite to the first main surface; the cooling member further comprising;
a cooling channel that is formed inside the cooling member for communicating cooling medium for cooling the light-emitting elements on the light-emitting element substrate;
an inlet port for introducing the cooling medium into the cooling channel; and
an outlet port for discharging the cooling medium from the cooling channel of the cooling member;
wherein the cooling channel has a spiral shape for gradually forming from a center portion side of the light-emitting element substrate to a circumferential edge portion side thereof when viewed from a direction orthogonal to the first main surface of the cooling member, wherein the cooling channel has a channel width that satisfies the following formula (1) when viewed from a direction orthogonal to the first main surface of the cooling member:
1 mm<w<c+2d  (1)
where w is the channel width, c is an average length of the longer sides of the plurality of the light-emitting elements, and d is a separation distance between the first main surface of the cooling member and the cooling channel with respect to a direction orthogonal to the first main surface of the cooling member.