US 12,072,512 B2
Security and tracking systems including energy harvesting components for providing autonomous electrical power
Clark D Boyd, Portsmouth, VA (US); Bradbury R Face, Smithfield, VA (US); and Jeffrey D Shepard, Norco, CA (US)
Assigned to FACE INTERNATIONAL CORPORATION, Norfolk, VA (US)
Filed by FACE INTERNATIONAL CORPORATION, Norfolk, VA (US)
Filed on Dec. 28, 2020, as Appl. No. 17/135,987.
Application 17/135,987 is a continuation of application No. 16/167,406, filed on Oct. 22, 2018, granted, now 10,879,838.
Application 16/167,406 is a continuation of application No. 15/919,177, filed on Mar. 12, 2018, granted, now 10,110,163, issued on Oct. 23, 2018.
Application 15/919,177 is a continuation of application No. 15/416,491, filed on Jan. 26, 2017, granted, now 9,923,514, issued on Mar. 20, 2018.
Prior Publication US 2021/0119574 A1, Apr. 22, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 5/00 (2006.01); G02B 5/02 (2006.01); H02J 3/38 (2006.01); H02J 50/00 (2016.01); H02S 40/22 (2014.01); H02S 40/38 (2014.01); H04W 4/029 (2018.01); H02J 7/35 (2006.01)
CPC G02B 5/0242 (2013.01) [G02B 5/0294 (2013.01); H02J 3/38 (2013.01); H02J 50/001 (2020.01); H02S 40/22 (2014.12); H02S 40/38 (2014.12); H04W 4/029 (2018.02); H02J 7/35 (2013.01); Y02E 10/52 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A security system, comprising:
a light-activated energy harvesting element;
a sensor device powered by electrical energy generated by the light activated energy harvesting element, the sensor device generating a sensor output signal according to a sensed parameter measured by the sensor device; and
an energy transmissive layer arranged over the energy harvesting element and arranged over the sensor device, the energy transmissive layer having an energy-incident side, the energy transmissive layer being formed of a material composition comprising:
a plurality of substantially-transparent particles, and
a substantially-transparent matrix material that fixes the plurality of substantially-transparent particles in a layer arrangement to form the energy transmissive layer,
the plurality of substantially-transparent particles being fixed in the matrix material in a configuration that causes the energy-incident side to reflect at least a portion of one or more selectable wavelengths of the impinging light energy on the energy-incident side to present an opaque appearance when viewed from substantially any aspect on the energy incident side, and
the energy transmissive layer passing 50% or more of light energy impinging on the energy transmissive layer through the energy transmissive layer to activate the energy harvesting element.