US Patent 10418506 Light-emitting device with integrated light sensor

A light-emitting device including a substrate at least partially doped with a first type of conductivity and including a face; light-emitting diodes each including at least one three-dimensional semiconducting element which is undoped or doped with the first type of conductivity and resting on the said face; and semiconducting regions forming photodiodes, at least partially doped with a second type of conductivity opposite to the first type of conductivity and extending in the substrate from the said face between at least some of the three-dimensional semiconducting elements, a portion of the substrate of first type of conductivity extending up to the said face at the level of each three-dimensional semiconducting element.