US 9,812,617 B2
Light-emitting device and image display apparatus
Kenichi Yoshimura, Osaka (JP); Tatsuya Ryohwa, Osaka (JP); and Makoto Izumi, Osaka (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Filed by Sharp Kabushiki Kaisha, Osaka-shi, Osaka (JP)
Filed on May 17, 2016, as Appl. No. 15/156,431.
Claims priority of application No. 2015-106655 (JP), filed on May 26, 2015.
Prior Publication US 2016/0351757 A1, Dec. 1, 2016
Int. Cl. H01L 33/00 (2010.01); H01L 33/50 (2010.01); H01L 33/56 (2010.01); H01L 33/44 (2010.01)
CPC H01L 33/504 (2013.01) [H01L 33/56 (2013.01); H01L 33/44 (2013.01); H01L 33/501 (2013.01); H01L 33/502 (2013.01); H01L 33/507 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A light-emitting device comprising:
a light-emitting element configured to emit blue light;
a first wavelength conversion member containing a Mn4+-activated fluorine complex phosphor that is excited by the blue light to emit red light;
a second wavelength conversion member containing a quantum-dot phosphor that is excited by the blue light to emit green light;
a blocking layer located between the second wavelength conversion member and the first wavelength conversion member, such that an interface between the blocking layer and the second wavelength member faces the first wavelength conversion member; and
an empty space located between the blocking layer and the first wavelength conversion member; wherein
the first wavelength conversion member and the second wavelength conversion member are separated from each other by the blocking layer and the empty space;
the blue light is incident at an interface between the first wavelength conversion and the empty space; and
the interface between the first wavelength conversion and the empty space includes a surface of the first wavelength conversion member that is not optically plane.