The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 20, 2021
Filed:
Jan. 17, 2020
Applicant:
Pixart Imaging Incorporation, HsinChu, TW;
Inventors:
Hui-Hsuan Chen, Hsinchu, TW;
Nien-Tse Chen, HsinChu, TW;
Assignee:
PIXART IMAGING INCORPORATION, Hsinchu, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06M 7/00 (2006.01); G01J 1/02 (2006.01); G01J 1/04 (2006.01); G02B 27/14 (2006.01); G01S 7/481 (2006.01); G01S 7/499 (2006.01); G01S 17/04 (2020.01);
U.S. Cl.
CPC ...
G01J 1/0204 (2013.01); G01J 1/0233 (2013.01); G01J 1/0414 (2013.01); G01J 1/0466 (2013.01); G01J 1/0488 (2013.01); G01S 7/4811 (2013.01); G01S 7/4813 (2013.01); G01S 7/499 (2013.01); G01S 17/04 (2020.01); G02B 27/144 (2013.01); Y10T 29/49016 (2015.01);
Abstract
A proximity sensing device includes: a light source, a sensing unit, a light guide unit, and a window. The light source emits light, which is guided by the light guide unit to the window. The emitted light reflected by an object is received by the same window. The light guide unit includes a partial-transmissive-partial-reflective (PTPR) optical element, whereby the light emitted from the light source is reflected by the PTPR optical element, while the light reflected by the object passes through the PTPR optical element. There is only one window required.