Light emitting device

A light emitting device of a chip on board-type comprising:

• a substrate having a main surface on which a first arrangement region and a second arrangement region are defined;
• a plurality of blue light emitting elements arranged on the main surface of the substrate;
• a phosphor sheet containing a phosphor that is excited by emission light from the plurality of blue light emitting elements and emits excitation light, the phosphor sheet being disposed above the plurality of blue light emitting elements;
• and
• an intermediate layer that covers the plurality of blue light emitting elements, the intermediate layer being disposed between the substrate and the phosphor sheet,
• wherein
• the plurality of blue light emitting elements includes first blue light emitting elements which emit first emission light having a first wavelength taken as a peak wavelength of a light emission spectrum, the first blue light emitting elements being arranged on the first arrangement region, and second blue light emitting elements which emit second emission light having a second wavelength taken as a peak wavelength of a light emission spectrum, the second blue light emitting elements being disposed on the second arrangement region, and the second wavelength being a longer wavelength than the first wavelength by a wavelength difference of at least 10 nm,
• the first arrangement region and the second arrangement region are provided such that a difficulty of the second blue light emitting elements to absorb the first emission light is increased,
• the phosphor sheet is divided into a plurality of phosphor regions when viewed from above, the plurality of phosphor regions being different from one another in at least either one of components and blending ratio of the phosphor,
• a refractive index of the intermediate layer is lower than a refractive index of the phosphor sheet,
• a film thickness of the intermediate layer is larger than ½ of an arrangement interval of the plurality of blue light emitting elements, and
• wires which sequentially connect the plurality of blue light emitting elements to one another are embedded in the intermediate layer.