Controlling PCB glass fiber orientation to limit crosstalk in a sensor module

摘要

A proximity sensing device having a light emitting assembly including a light emitting device for proximity sensing positioned on a substrate and a light emitting lens positioned along a side of the light emitting device opposite the substrate and a light receiving assembly having a light receiving device positioned on the substrate and a receiving lens positioned along a side of the light receiving device opposite the substrate. A mid wall is positioned between the light emitting assembly and the light receiving assembly which includes a crosstalk controlling portion positioned between the light emitting lens and the light receiving lens that is configured to reduce optical crosstalk between the light emitting assembly and the light receiving assembly.

主权项

1. A proximity sensing apparatus comprising:
a light emitting assembly having a light emitting device for proximity sensing positioned on a substrate and a light emitting lens that is positioned along a side of the light emitting device that is opposite the substrate, the light emitting lens capable of transmitting light from the light emitting device to an ambient environment; a light receiving assembly having a light receiving device positioned on the substrate and a receiving lens positioned along a side of the light receiving device opposite the substrate, the light receiving lens capable of collecting light and transmitting the light toward the light receiving device; and a mid wall positioned between the light emitting assembly and the light receiving assembly, the mid wall having a crosstalk controlling portion positioned between the light emitting lens and the light receiving lens, the crosstalk controlling portion having a plurality of lengthwise fibers and a plurality of crosswise fibers oriented substantially orthogonal with respect to one another and at a substantially non-orthogonal angle with respect to a lateral axis bisecting the light emitting lens and the light receiving lens.