US 11,982,902 B2
Light-emitting device including polarized light control member
Takuya Kadowaki, Yokohama (JP); Tadashi Kawazoe, Atsugi (JP); and Masaki Sugeta, Yokohama (JP)
Assigned to NICHIA CORPORATION, Anan (JP)
Filed by NICHIA CORPORATION, Anan (JP)
Filed on Aug. 29, 2022, as Appl. No. 17/898,081.
Claims priority of application No. 2021-141810 (JP), filed on Aug. 31, 2021.
Prior Publication US 2023/0061261 A1, Mar. 2, 2023
Int. Cl. G02F 1/13357 (2006.01); H01L 25/075 (2006.01); H01L 33/50 (2010.01); H01L 33/58 (2010.01)
CPC G02F 1/133603 (2013.01) [H01L 25/0753 (2013.01); H01L 33/504 (2013.01); H01L 33/58 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A light-emitting device comprising:
at least one light-emitting element comprising a semiconductor layered portion and configured to emit light that has a predetermined wavelength and includes a first polarization component and a second polarization component; and
at least one polarized light control member in contact with the at least one light-emitting element; wherein:
the at least one polarized light control member comprises a first structure and a second structure positioned in order from a light-emitting element side;
in the first structure and the second structure, a length in a height direction perpendicular to a light-emitting surface of the light-emitting element, a length in a vertical direction perpendicular to the height direction, and a length in a horizontal direction perpendicular to both of the height direction and the vertical direction are less than a length of the predetermined wavelength;
a distance between the first structure and the second structure is less than the length of the predetermined wavelength;
a ratio of a length of the second structure in the horizontal direction to a length of the second structure in the vertical direction is greater than 1; and
the predetermined wavelength is in a range from a wavelength on a short side to a wavelength on a long side of a wavelength having an intensity that is half an intensity of a peak wavelength of light emitted from the at least one light-emitting element.