Optical proximity sensor system having reduced sensitivity to distinct near-field optical effects

摘要

A portable electronic device including a proximity sensing device having an emitter and a detector. The electronic device further including a housing for containing the proximity sensing device which includes an optical interface forming a face of the housing through which radiation between the emitter and the detector pass. The optical interface may include an oleophobic coating which is selectively modified such that optical interference from an optical interface near-field object on the proximity sensing device is reduced without reducing a sensitivity of the proximity sensing device to a target near-field object.

主权项

1. A portable electronic device comprising:
a proximity sensing device having an emitter and a detector; a housing for containing the proximity sensing device; and an optical interface forming a face of the housing through which radiation between the emitter and the detector pass, wherein the optical interface comprises an oleophobic coating defining a first region and a second region over the optical interface, wherein the first region and the second region have a different optical property such that optical interference from an optical interface near-field object on the proximity sensing device is reduced without reducing a sensitivity of the proximity sensing device to a target near-field object.