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:
Oct. 01, 2019
Filed:
Apr. 18, 2018
Applicant:
Japan Display Inc., Minato-ku, JP;
Inventors:
Youichi Asakawa, Tokyo, JP;
Ken Onoda, Tokyo, JP;
Toshihiko Fukuma, Tokyo, JP;
Shinichi Komura, Tokyo, JP;
Assignee:
Japan Display Inc., Minato-ku, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 27/48 (2006.01); H01S 5/042 (2006.01); H01S 5/00 (2006.01); H01S 5/40 (2006.01); H01S 5/30 (2006.01); F21V 8/00 (2006.01); G02F 1/1335 (2006.01);
U.S. Cl.
CPC ...
G02B 27/48 (2013.01); H01S 5/0078 (2013.01); H01S 5/0428 (2013.01); H01S 5/4012 (2013.01); H01S 5/4093 (2013.01); G02B 6/003 (2013.01); G02B 6/0046 (2013.01); G02B 6/0053 (2013.01); G02B 6/0068 (2013.01); G02F 1/133514 (2013.01); G02F 1/133621 (2013.01); H01S 5/3013 (2013.01); H01S 5/3018 (2013.01);
Abstract
According to one embodiment, a semiconductor laser includes a semiconductor laser element. A drive current which is composed of a direct current and an alternating current superposed thereon is applied to the semiconductor laser element. A waveform of the alternating current is a non-square wave. A frequency of the alternating current is from 50 Hz to 500 kHz.