Patent ID: 8733993

Claim:
A light emitting device comprising: an excitation light source for emitting excitation light; a light emitting section for emitting fluorescence upon receiving the excitation light emitted from the excitation light source, the light emitting section having a top surface, a bottom surface and a side surface connecting the top surface and the bottom surface; and a light projecting section for projecting, along a predetermined light projection direction, the fluorescence emitted by the light emitting section, wherein a part of the light projecting section is provided so as to face the top surface of the light emitting section, the top surface having a larger area than that of the side surface of the light emitting section, the top surface of the light emitting section is flat and configured to receive the excitation light and to emit the fluorescence, the light emitting section has an maximum width in a direction parallel to the top surface, and a thickness of the light emitting section, which is defined by a distance between the top surface and the bottom surface, is not more than one tenth of the maximum width of the light emitting section.