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Patent Searching and Data


Title:
LIGHT OUTPUT MODULE AND LIGHT EMISSION CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2018/155405
Kind Code:
A1
Abstract:
[Problem] To provide a light output module capable of maintaining a stable light output power in a normal temperature region and a high temperature region without complicating the configuration. [Solution] The light output module is provided with a light output means 1, a temperature measurement means 2, a selection means 3, and a control means 4. The light output means 1 outputs, from a laser element, light with a power corresponding to a current flowing through the laser element. The temperature measurement means 2 measures the temperature around the laser element. The selection means 3 selects either one of a first control amount for keeping the value of the current flowing through the laser element constant, and a second control amount for allowing a current set in advance for each temperature to flow to the laser element. The control means 4 controls the current flowing through the laser element on the basis of the selected control amount. Further, the selection means 3 selects the first control amount when the temperature measured by the temperature measurement means 2 is less than a reference temperature, and selects the second control amount when said temperature is higher than the reference temperature.

Inventors:
ARAI NARIHIRO (JP)
Application Number:
JP2018/005879
Publication Date:
August 30, 2018
Filing Date:
February 20, 2018
Export Citation:
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Assignee:
NEC CORP (Postcode1088001, JP)
International Classes:
H01S5/068; H04B10/293; H04B10/564
Domestic Patent References:
WO2007102236A12007-09-13
Foreign References:
JP2007324525A2007-12-13
JP2005086055A2005-03-31
JPH0537066A1993-02-12
JP2009089121A2009-04-23
US20070081567A12007-04-12
JP2002246687A2002-08-30
US5907569A1999-05-25
JPH1126849A1999-01-29
JPH03133187A1991-06-06
Attorney, Agent or Firm:
SHIMOSAKA Naoki (Postcode1088001, JP)
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