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US 2025/0067667 A1Published application
Smoke detector reducing false alarm rate
AssigneePixart Imaging Inc.
InventorsCHENG-NAN TSAI, Yen-Chang Chu, Chih-Ming Sun, Chi-Chih Shen, Kuo-Hsiung Li
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Abstract
There is provided an optical machine of a smoke detector including a substrate, a light source, a light sensor and a light blocking member. The light source and the light sensor are arranged on the substrate in a first direction. The light blocking member is arranged upon the light source and blocks a part of an emission angle of the light source in the first direction far away from the light sensor.
Claims16
An optical machine of a smoke detector, the optical machine comprising:
- a substrate;
- a light sensor, arranged on the substrate;
- a first light source, arranged on the substrate and having a first emission angle;
- and
- a light blocking member, comprising a first opening upon the first light source, and the first opening exposing a part of the first emission angle of the first light source close to the light sensor.
2 more elements
Dependencies are inferred from the claim text.