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US 12,188,865 B2Granted
Optical machine of smoke detector
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.
Claims12
An optical machine of a smoke detector, the optical machine comprising:
- a substrate;
- a light sensor, arranged on the substrate;
- a light source, arranged on the substrate and having an emission angle;
- a transparent gel, encapsulating the light sensor and the light source, and having a first tilted surface extending from a first side of the transparent gel toward the light source to be connected to an upper surface of the transparent gel above the light source, wherein a part of a top surface of the light source is opposite to the first tilted surface in a longitudinal direction and another part of the top surface of the light source is opposite to the upper surface of the transparent gel in the longitudinal direction;
- and
- a first light blocking layer, formed on the first side and the first tilted surface of the transparent gel to block a part of the emission angle of the light source and to expose the another part of the top surface of the light source in the longitudinal direction.
3 more elements
An optical machine of a smoke detector, the optical machine comprising:
- a substrate;
- a light sensor, arranged on the substrate;
- a light source, arranged on the substrate and having an emission angle;
- a transparent gel, encapsulating the light sensor and the light source, and having a first tilted surface extending from a first side of the transparent gel toward the light source to be above the light source;
- a first light blocking layer, formed on the first side and the first tilted surface of the transparent gel to block a part of the emission angle of the light source;
- and
- a light blocking wall in the transparent gel between the light source and the light sensor, wherein
- the light blocking wall comprises opaque material filled in a vertical trench of the transparent gel, and the first tilted surface and the light blocking wall are arranged at two opposite sides of the light source.
5 more elements
Dependencies are inferred from the claim text.