Light source unit including a light emitting plate on which a diffusive transmission area and a luminescent light emitting area are formed, and projector

摘要

There is provided a light source unit comprising a first and second light sources, a luminescent light emitting device having a light emitting plate, a light source control device controlling the illumination of the light sources and driving of the light emitting plate, and a light guiding optical system guiding light from the light sources and luminescent light from the light emitting plate so that optical axes coincide to be directed in the same direction, wherein the light emitting plate includes a first area with a luminescent material layer on a reflection layer, a second area transmitting light from the light sources while diffusing it and a third area with a luminescent material layer on a dichroic layer, and wherein the light emitting plate includes a drive motor positioning repeatedly sequentially the first, second and third areas in an optical axis position of light from the light sources.

主权项

1. A light source unit comprising:
a first light source and a second light source that emit light in different wavelength bands; a luminescent light emitting device including a light emitting plate onto which light emitted from the first light source and the second light source is shone; a light source control device that controls turning on of the first light source and the second light source and driving of the light emitting plate of the luminescent light emitting device; and a light guiding optical system that guides the light from the first light source and the second light source that passes through the light emitting plate and luminescent light generated and emitted from the light emitting plate so that optical axes thereof coincide with each other so as to be directed in a same direction, wherein the light emitting plate comprises a first area where a luminescent material layer is provided on a reflection layer, a second area that transmits the light from the first light source and the second light source while diffusing the light, and a third area where a luminescent material layer is provided on a dichroic layer that reflects the luminescent light and transmits the light from the first light source, and wherein the luminescent light emitting device comprises a light emitting plate driving device that repeatedly and sequentially positions the first area, the second area and the third area in an optical axis position of the light emitted from the first light source and the second light source.