Light emitting device

#This application claims the benefit of Japanese Patent Application No. 2016-076811, filed on Apr. 6, 2016, the disclosure of which is hereby incorporated by reference in its entirety.

#The present disclosure relates to a light emitting device.

#Japanese Unexamined Patent Application Publication No. 2010-251621, for example, discloses a semiconductor light emitting device comprising a first light emitting composition made by sealing a first phosphor, which is a low refractive index magnesium-activated fluoro complex phosphor, with a first transparent sealing material; a second light emitting composition made by sealing a second phosphor having a higher refractive index than that of the first transparent sealing material with a second transparent sealing material, which has a refractive index higher than that of the first sealing member, but equal to or lower than that of the second phosphor; and a semiconductor light emitting element, which is the light source for exciting the first phosphor and the second phosphor. The patent application publication also discloses that the first light emitting composition and the second light emitting composition are arranged so that the light released from the second phosphor is extracted from the light emitting device via the first light emitting composition.

#FIG. 1A is a schematic perspective view of a light emitting device according to an embodiment of the present disclosure.

#FIG. 1B is a schematic sectional view of the light emitting device in FIG. 1A.

#FIG. 2A is a schematic sectional view of a wavelength conversion sheet according to the embodiment in FIGS. 1A and 1B.

#Certain embodiments of the present disclosure will be explained below with reference to the accompanying drawings. The light emitting devices explained below are intended to embody the technical ideas of the present disclosure, and unless otherwise specifically noted, the present disclosure is not limited to those described below. Moreover, the sizes and relative positions of the members shown in the drawings might be exaggerated for clarity of explanation.

#It is assumed that the visible spectrum has the wavelengths ranging between 380 nm and 780 nm, the blue region has a wavelength ranging between 420 nm and 480 nm, the green region has a wavelength ranging between 500 nm and 570 nm, the yellow region has a wavelength range that is above 570 nm but 590 nm at most, and the red region has a wavelength ranging between 610 nm and 750 nm.

#An Embodiment of Present Disclosure