LIGHT SOURCE UNIT HAVING A MICROLENS ARRAY FOR CONVERTING EXCITATION LIGHT INTO PLURAL LIGHT RAY BUNDLES AND PROJECTOR INCLUDING THE LIGHT SOURCE UNIT

摘要

To provide a projector which enables a stable projection for a long period of time, there is provided a projector comprising a light source unit, a display device, a projection-side optical system, a light guiding optical system and a projector control unit, wherein the light source unit comprises an excitation light source unit comprising an excitation light source and a microlens array and a rectangular green luminescent plate which receives light emitted from the excitation light source to emit light in a green wavelength band, and the microlens array is disposed between the excitation light source and the luminescent plate and has a plurality of micro convex lenses which each have a similar shape to the shape of the luminescent material layer are arranged into a matrix, so as to convert light from excitation light source into a plurality of pencils of light to shine them onto the luminescent plate.

主权项

1. A light source unit comprising:
an excitation light source;
a blue light source which emits light in a blue wavelength band; a luminescent plate comprising a luminescent material layer which emits luminescent light by receiving light emitted from the excitation light source; a microlens array which is disposed between the excitation light source and the luminescent plate and which converts light emitted from the excitation light source into a plurality of pencils of light so as to be shone onto the luminescent plate; and a collective lens which is disposed in proximity to the luminescent plate and which shines the plurality of pencils of light so that their center positions are superposed one on another on the luminescent material layer;
a dichroic mirror which makes an optical axis of the blue light source and an optical axis of the luminescent light coincide with each other on the same optical axis.