公开(公告)号：US09651405B1

公开(公告)日：2017-05-16

申请号：US14640376

申请日：2015-03-06

Applicant: Apple Inc.

Inventor： Baboo V. Gowreesunker ,  Joseph William Colosimo ,  Vladimir Fedorov

IPC: G01D5/347

CPC classification number: G01D5/3473 ,  G01D5/34715 ,  G01D5/34776 ,  G05G9/047 ,  G06F3/0362

Abstract: A light source in a rotary optical encoder can illuminate a pattern on a rotatable shaft and an optical sensor can detect either the light that is reflected or transmitted based on the pattern. A sampling rate of the optical sensor is dynamically adjusted based on a rotational speed of the rotatable shaft. A pulse rate of the light source may also be dynamically adjusted based on the sampling rate of the optical sensor.

公开(公告)号：US10302465B2

公开(公告)日：2019-05-28

申请号：US15594834

申请日：2017-05-15

Applicant: Apple Inc.

Inventor： Baboo V. Gowreesunker ,  Joseph William Colosimo ,  Vladimir Fedorov

IPC: G01D5/347 ,  G05G9/047 ,  G06F3/0362

Abstract: A light source in a rotary optical encoder can illuminate a pattern on a rotatable shaft and an optical sensor can detect either the light that is reflected or transmitted based on the pattern. A sampling rate of the optical sensor is dynamically adjusted based on a rotational speed of the rotatable shaft. A pulse rate of the light source may also be dynamically adjusted based on the sampling rate of the optical sensor.

公开(公告)号：US20170248446A1

公开(公告)日：2017-08-31

申请号：US15594834

申请日：2017-05-15

Applicant: Apple Inc.

Inventor： Baboo V. Gowreesunker ,  Joseph William Colosimo ,  Vladimir Fedorov

IPC: G01D5/347 ,  G05G9/047 ,  G06F3/0362

CPC classification number: G01D5/3473 ,  G01D5/34715 ,  G01D5/34776 ,  G05G9/047 ,  G06F3/0362

Abstract: A light source in a rotary optical encoder can illuminate a pattern on a rotatable shaft and an optical sensor can detect either the light that is reflected or transmitted based on the pattern. A sampling rate of the optical sensor is dynamically adjusted based on a rotational speed of the rotatable shaft. A pulse rate of the light source may also be dynamically adjusted based on the sampling rate of the optical sensor.