LIGHT SOURCE DEVICE AND DISPLAY DEVICE

摘要

One embodiment provides a light source device 10 that efficiently emits a light. The light source device 10 comprises a light-emitting element 12 that emits an excited light having a wavelength shorter than that of a blue light and a rod 14 having a light-converting member 13 enclosed inside and emitting a white light from an outgoing part 14out, the light-converting member 13 converting the excited light that enters through an incident part 14in into a long-wavelength light having a longer wavelength, and the incident part 14in is covered with a dichroic coat 17 that transmits the excited light and reflects the long-wavelength light.

主权项

1. A light source device comprising:
a light-emitting element configured to emit an excited light comprising a wavelength shorter than that of a blue light and a rod comprising a first opening defining an entry area and a second opening defining an exit area, the rod also comprising a light-converting material enclosed inside the rod, the rod emitting a white light from the exit area of the rod, and the light-converting material converting the excited light that enters through the entry area of the rod into a long-wavelength light comprising a longer wavelength, wherein the entry area is covered with a dichroic coat that transmits the excited light and reflects the long-wavelength light, the light source device further comprises an optical material that reflects or refracts the excited light generated by the light-emitting element so that a direction of the excited light is substantially vertical toward the entry area and a reflection part that reflects the excited light, wherein a cross-sectional shape of the reflection part is a part of an arc of a first ellipse and a cross-sectional shape of the entry area is a part of an arc of a second ellipse, wherein the light emitting element is disposed at a first focal point of the first ellipse, wherein the light-converting material is disposed at a second focal point of the first ellipse and at a first focal point of the second ellipse, and wherein the outgoing part is disposed on a side of a second focal point of the second ellipse.