Optical proximity sensors and the associated user interface

In the proximity sensor including a housing, a light emitter detects the amount of light entering the housing in accordance with the photo-detector is the detector plane in the projection light, and the housing from the housing along the detection plane, so that each light emitter in the housing-detector pair ( About E, D) 
When the corresponding sensing surface the object to within a target position p (E, D) position, the light emitted by the light emitter (E) is scattered by the object is expected to be detected with maximum by the detector (D), the light emitter and detector pair the activated synchronously, and reads the detected intensity from the detector, and the detector plane light emitter between the inner neighboring target position - from, the detected light amount depending on the position-related-detection from the detector pairs detect related to object position proximity sensors to calculate the location of the object is detected on one side.