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US 11,143,551 B2Granted
Proximity sensor with infrared ink coating
OwnerVanapong Kwangkaew, Sirirat Silapapipat +1inventors
InventorsVanapong Kwangkaew, Sirirat Silapapipat, Sanjay Mitra
Life of this patent
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Abstract
A sensor comprising a light emitter and light detector directly covered and encapsulated by a layer of light transmissive compound. A gap in the light transmissive compound between the light emitter and the light detector filled with an infrared ink. In some embodiments, an infrared ink can cover at least a portion of a top surface of the sensor and define apertures above the light detector and/or light emitter.
Claims6
A sensor, comprising:
- an infrared light emitter mounted at a first position on a base;
- an infrared light detector mounted at a second position on said base;
- a first region of optically transmissive material covering said light emitter;
- a second region of optically transmissive material covering said light detector, wherein said first region of optically transmissive material and said second region of optically transmissive material define a gap, and
- an infrared-blocking ink that fills said gap;
- wherein said ink can at least partially cover a top surface of said first region of optically transmissive material,
- wherein said ink can at least partially cover a top surface of said second region of optically transmissive material;
- and wherein said ink filling said gap is contiguous with said ink covering said top surface of said first region and said second region of optically transmissive material.
5 more elements
Dependencies are inferred from the claim text.