US 11,867,651 B2
Light emitting module including enhanced safety features
Sylvain Grossmann, Eindhoven (NL); and Edgar Flores, Zurich (CH)
Assigned to ams Sensors Asia Pte. Ltd., Singapore (SG)
Appl. No. 17/621,571
Filed by ams Sensors Asia Pte. Ltd., Singapore (SG)
PCT Filed Jul. 17, 2020, PCT No. PCT/SG2020/050417
§ 371(c)(1), (2) Date Dec. 21, 2021,
PCT Pub. No. WO2021/010903, PCT Pub. Date Jan. 21, 2021.
Claims priority of provisional application 62/875,072, filed on Jul. 17, 2019.
Prior Publication US 2022/0357295 A1, Nov. 10, 2022
Int. Cl. G01N 27/22 (2006.01); G01N 27/20 (2006.01)
CPC G01N 27/223 (2013.01) [G01N 27/20 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a light emitter operable to produce light having a particular wavelength;
a transmissive cover disposed so as to intersect a path of light emitted by the light emitter, wherein the transmissive cover is substantially transparent to the wavelength of light produced by the light emitter;
a first electrically conductive structure disposed on a first surface of the transmissive cover;
a second electrically conductive structure disposed on a second surface of the transmissive cover, the second surface being different from the first surface, and each of the first and second surfaces intersecting a path of the light produced by the light emitter; and
a controller;
wherein:
each of the first and second electrically conductive structures is coupled electrically to the controller, and
the controller is operable to monitor a respective electrical characteristic of each of the first and second electrically conductive structures such that if the monitored characteristic for a particular one of the first or second electrically conductive structures changes by more than a respective predetermined amount, the controller regulates an optical output produced by the light source;
wherein the controller is operable to monitor signals from the first electrically conductive structure for a change in resistance, and wherein the controller is operable to monitor signals from the second electrically conductive structure for a change in capacitance.