US 12,402,800 B2
Heart rate detection module and electronic device
Wenxiong Wei, Hangzhou (CN); Xingxing Chen, Shanghai (CN); Minli Chen, Dongguan (CN); Bing Wu, Dongguan (CN); and Fan Wang, Shenzhen (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Appl. No. 18/557,018
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
PCT Filed Apr. 19, 2022, PCT No. PCT/CN2022/087591
§ 371(c)(1), (2) Date Oct. 24, 2023,
PCT Pub. No. WO2022/228197, PCT Pub. Date Nov. 3, 2022.
Claims priority of application No. 202110449802.0 (CN), filed on Apr. 25, 2021.
Prior Publication US 2024/0206750 A1, Jun. 27, 2024
Int. Cl. A61B 5/024 (2006.01); A61B 5/00 (2006.01); A61B 5/1455 (2006.01)
CPC A61B 5/02416 (2013.01) [A61B 5/1455 (2013.01); A61B 5/725 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A heart rate detection module, comprising:
a substrate;
a light source disposed on the substrate;
an optical receiver disposed on the substrate at an interval from the light source;
a light blocking portion disposed on the substrate between the light source and the optical receiver; and
an optical film, wherein the optical film covers the light source, the optical receiver, and the light blocking portion, a light filtering portion is on a side of the optical film that faces the substrate, and the light filtering portion is configured to filter interference light emitted to the optical receiver;
wherein the light filtering portion comprises a first light guide portion between the light source and the light blocking portion, and the first light guide portion is configured to guide interference light that comes from the light source to deviate from the optical receiver; and
wherein a section of the first light guide portion that is along a direction perpendicular to the optical film is a triangle, and meets: x1>y1, wherein x1 is a length of a projection, on a surface of the optical film, of a side edge that is of the section of the first light guide portion and that is closest to the light source, and y1 is a length of a projection, on the surface of the optical film, of a side edge that is of the section of the first light guide portion and that faces away from the light source.