US 11,868,033 B2
Wavelength conversion element and light source module and projection display device
Shota Nishi, Tokyo (JP); Izushi Kobayashi, Tokyo (JP); Yuki Maeda, Tokyo (JP); and Masahiro Ishige, Tokyo (JP)
Assigned to SONY GROUP CORPORATION, Tokyo (JP)
Appl. No. 17/266,806
Filed by Sony Group Corporation, Tokyo (JP)
PCT Filed Aug. 7, 2019, PCT No. PCT/JP2019/031145
§ 371(c)(1), (2) Date Feb. 8, 2021,
PCT Pub. No. WO2020/044999, PCT Pub. Date Mar. 5, 2020.
Claims priority of application No. 2018-158129 (JP), filed on Aug. 27, 2018; and application No. 2019-034421 (JP), filed on Feb. 27, 2019.
Prior Publication US 2021/0341823 A1, Nov. 4, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G03B 21/16 (2006.01); G02B 26/00 (2006.01); G03B 21/20 (2006.01)
CPC G03B 21/16 (2013.01) [G02B 26/008 (2013.01); G03B 21/204 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A wavelength conversion element comprising:
a phosphor layer including a plurality of phosphor particles, the phosphor layer having a gap therein;
a refrigerant that cools the phosphor layer;
a refrigerant transport member provided in contact with the phosphor layer, the refrigerant transport member circulating the refrigerant, wherein the refrigerant is circulated by capillary force generated in the phosphor layer and the refrigerant transport member, and wherein a capillary force in the phosphor layer is greater than a capillary force in the refrigerant transport member; and
a housing in which the phosphor layer, the refrigerant, and the refrigerant transport member are encapsulated.