公开(公告)号：US20230037571A1

公开(公告)日：2023-02-09

申请号：US17788456

申请日：2020-12-30

Applicant: NEONODE INC.

Inventor： Stefan Johannes Holmgren ,  Jan Tomas Hartman ,  Tom Richard Berglind ,  Lars Bertil Sparf ,  Jonas Daniel Justus Hjelm ,  Jon Elis Gõsta Karlsson ,  Per Carl Sture Rosengren ,  Gunnar Martin Frõjdh ,  Joseph Shain ,  Xiatao Wang ,  Clarence Ray King III ,  Oscar Ritzén Praglowski de Radwan

IPC: G06F3/042 ,  G01V8/20 ,  G06F3/01 ,  G06F3/041

Abstract: A proximity sensor, including light emitters and light detectors mounted on a circuit board, two stacked lenses, positioned above the emitters and the detectors, including an extruded cylindrical lens and a Fresnel lens array, wherein each emitter projects light through the two lenses along a common projection plane, wherein a reflective object located in the projection plane reflects light from one or more emitters to one or more detectors, and wherein each emitter-detector pair, when synchronously activated, generates a greatest detection signal at the activated detector when the reflective object is located at a specific 2D location in the projection plane corresponding to the emitter-detector pair, and a processor sequentially activating the emitters and synchronously co-activating one or more detectors, and identifying a location of the object in the projection plane, based on amounts of light detected by the detector of each synchronously activated emitter-detector pair.