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:
Nov. 28, 2023
Filed:
Oct. 15, 2021
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 30/56 (2020.01); G06F 3/01 (2006.01); G09G 3/00 (2006.01); G09G 3/02 (2006.01); G09F 19/18 (2006.01); G02B 26/10 (2006.01);
U.S. Cl.
CPC ...
G02B 30/56 (2020.01); G06F 3/011 (2013.01); G09F 19/18 (2013.01); G09G 3/003 (2013.01); G09G 3/02 (2013.01); G02B 26/101 (2013.01); G09G 2354/00 (2013.01);
Abstract
A display apparatus includes a laser radiation device, an object detection device, and a control device. The laser radiation device is configured to radiate laser light of a predetermined wavelength range to a display position in a gas to form a plasma in the display position. The object detection device is configured to detect presence or absence of an object in a predetermined space. The control device is configured to determine the predetermined space on a basis of the display position and intensity of the laser light scattered in the display position or having passed the display position.