Light emitting device with phosphors
View Patent ↗A light emitting device includes a first light emitting element, a second light emitting element, a first phosphor sheet containing a first phosphor and a third phosphor, and covering a top face of the first light emitting element, and a second phosphor sheet containing a second phosphor and a fourth phosphor, and covering a top face of the second light emitting element, wherein a peak wavelength of light which is wavelength-converted by the first phosphor or the third phosphor is equal to or less than a peak wavelength of light which is wavelength-converted by the second phosphor or the fourth phosphor.
1. A light emitting device comprising:
a first blue light emitting element;
a second blue light emitting element;
a first phosphor sheet containing a first phosphor and a third phosphor different from the first phosphor, and covering a top face of the first blue light emitting element; and
a second phosphor sheet containing a second phosphor different from the first phosphor and a fourth phosphor different from the second phosphor, and covering a top face of the second blue light emitting element,
wherein a peak wavelength of, light which is wavelength-converted by the first phosphor is less than a peak wavelength of light which is wavelength-converted by the third phosphor, and the peak wavelength of light which is wavelength-converted by the third phosphor is equal to or less than a peak wavelength of light which is wavelength-converted by the second phosphor, and the peak wavelength of light which is wavelength-converted by the second phosphor is less than a peak wavelength of light which is wavelength-converted by the fourth phosphor, and
the first phosphor sheet does not contain a phosphor wavelength-converting to lights having a peak wavelength more than the peak wavelength of light which is wavelength-converted by the second phosphor, and the second phosphor sheet does not contain a phosphor wavelength-converting to lights having a peak wavelength less than the peak wavelength of light which is wavelength-converted by the third phosphor.
2. The light emitting device according to claim 1 , further comprising a white reflection resin provided between the first phosphor sheet and the second phosphor sheet.
3. The light emitting device according to claim 2 , wherein the white reflection resin is provided in a position interrupting a portion between a side face of the first phosphor sheet and a side face of the second phosphor sheet opposed to the side face of the first phosphor sheet.