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Patent Searching and Data


Title:
LASER DIODE DRIVE CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2021/079611
Kind Code:
A1
Abstract:
This laser diode drive circuit is provided with a switching element, a control unit that performs on/off control of the switching element, a second series circuit that is connected in parallel with a first series circuit including a laser diode, and a capacitor. The second series circuit includes a rectifying element and a current limiting unit that limits a current flowing through the rectifying element, and is connected in parallel with the first series circuit such that the direction from the anode to the cathode of the rectifying element and the direction of the anode to the cathode of the laser diode are opposite to each other. The capacitor is charged when the switching element is off, and, together with the switching element, the first series circuit, and the second series circuit, forms a closed circuit when the switching element is on.

Inventors:
NAKAKOHARA YUSUKE (JP)
HOANG TAN NHAT (JP)
Application Number:
PCT/JP2020/032145
Publication Date:
April 29, 2021
Filing Date:
August 26, 2020
Export Citation:
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Assignee:
ROHM CO LTD (JP)
International Classes:
H01S5/06; G01S7/484; G01S17/931
Foreign References:
JP2009544022A2009-12-10
JP2016512652A2016-04-28
JP2018077073A2018-05-17
US20180261975A12018-09-13
JP2015179436A2015-10-08
JP2002208677A2002-07-26
US20180109074A12018-04-19
Attorney, Agent or Firm:
SANO PATENT OFFICE (JP)
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