Patent ID: 9625251
Date: 2017-04-18
CPC Classifications: A61B,A61N,G01B

Claim:
1. A system for detecting a user's facial movement, facial expression, or both, the system comprising: a plurality of radiation sources; a plurality of radiation detectors, wherein each radiation detector is paired with a different one of the radiation sources and configured to detect radiation emitted by its paired radiation source; and a controller connected to the radiation detectors and configured to: wherein a first one of the radiation source-detector pairs comprises a radiation source and a detector adapted to be located on opposite sides of the user's eye to define a first radiation path adjacent to the user's supraorbital fat pad, and the controller is configured to determine information about whether the first radiation path is blocked by the user's supraorbital fat pad; and wherein a second one of the radiation source-detector pairs comprises a radiation source and a detector adapted to be located on opposite sides of the user's eye to define a second radiation path adjacent to the user's malar fat pad, and the controller is configured to determine information about whether the second radiation path is blocked by the user's malar fat pad.