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:
Jan. 31, 1995
Filed:
Aug. 05, 1993
Tsuneshi Yokota, Kawasaki, JP;
Katsumi Suzuki, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A laser driver outputs a drive current. A high frequency current generated by a HF current generator is superimposed to the drive current via a coupling capacitor. A laser diode is driven by the high-frequency-current superimposed drive current. This superimposed drive current has a period for performing a laser oscillation at the laser diode and a period for stopping the laser oscillation. The laser light is reflected at the surface of an optical disk and returned to the laser diode. When the reflected laser light is returned to the laser diode, the laser diode is in the laser oscillation stopping period of the superimposed drive current.