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Title:
LIGHT-EMITTING DEVICE
Document Type and Number:
Japanese Patent JP2016018893
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a light-emitting device capable of enhancing the condensing performance, while suppressing up-sizing of an optical system.SOLUTION: A light-emitting device 1 includes a light-emitting component 10, a condenser lens 20, and a reflection member 30. The condenser lens 20 has an emitting surface 26, a first recess 12, a second recess 14, and a first reflection surface 21. The first recess 12 is concave to the opposite side of the emitting surface 26. The first recess 12 includes a first light incident surface 22 directing the light-emitting surface 11. When the LED light from the light-emitting surface 11 impinges on the first light incident surface 22, the incident light from the first light incident surface 22 is reflected by the first reflection surface 21 to the emitting surface 26. The first recess 12 covers the light-emitting surface 11. The reflection member 30 surrounds the first reflection surface 21 from the outside of the first recess 12, receives the light having an emission angle θ in the vicinity of 90 degrees, out of the emission light of the light-emitting component 10, and reflects that light to the emitting surface 26. The reflection member 30 is arranged on the side face side of the condenser lens 20.SELECTED DRAWING: Figure 1

Inventors:
OKUMURA SHINICHIRO
Application Number:
JP2014140690A
Publication Date:
February 01, 2016
Filing Date:
July 08, 2014
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP
MITSUBISHI ELECTRIC CORP
International Classes:
H01L33/58; G02B3/04; G02B3/08
Domestic Patent References:
JP2008141152A2008-06-19
JP2010262187A2010-11-18
JP2009169095A2009-07-30
JP2013130835A2013-07-04
JP2007035788A2007-02-08
JP2007142178A2007-06-07
JPS59180515A1984-10-13
Foreign References:
US7580192B12009-08-25
Attorney, Agent or Firm:
Mamoru Takada
Hideki Takahashi
Jiro Ozawa