Projector and image display method including a light separation optical system

1. A projector comprising:

a first light source that outputs a first light containing a first fluorescence generated in a first fluorescence region;

a second light source that sequentially outputs a second light and a third light whose wavelength is different from that of the second light, the second light containing a second fluorescence generated in a second fluorescence region;

first to third image display elements;

a light separation optical system that generates, from the first light, the second light and the third light that are input, an illumination light illuminating said first to third image display elements with colors different from each other and that radiates the illumination light to said first to third image display elements; and

a controller that causes said first to third image display elements to display an image according to an input video signal and colors of the illumination light radiated to said first to third image display elements.

2. The projector according to claim 1 , wherein at least either the first fluorescence or the second fluorescence comprises a mixed color light that includes two color components in the colors of the illumination light generated by said light separation optical system.

3. The projector according to claim 1 , wherein the first fluorescence region is provided on a first fluorescent wheel and the second fluorescence region is provided on a second fluorescent wheel.

4. The projector according to claim 1 , wherein the first fluorescence region and the second fluorescence region are provided on a fluorescent wheel provided in common on said first light source and said second light source.

5. The projector according to claim 1 , further comprising:

first to third illumination optical systems which are provided between said first to third image display elements and said light separation optical system and converge the illumination light from said light separation optical system on said first to third image display elements.

6. The projector according to claim 1 , wherein said first to third image display elements comprise transmission-type liquid crystal light bulbs.

7. The projector according to claim 1 , wherein said first to third image display elements comprise DMDs.

8. The projector according to claim 1 , wherein said first to third image display elements comprise LCOS.

9. An image display method comprising:

causing a first light containing a first fluorescence generated in a first fluorescence region to be output from a first light source;

causing a second light containing a second fluorescence generated in a second fluorescence region and a third light whose wavelength is different from that of the second light to be sequentially output from a second light source;

generating, from the first light, the second light and the third light, an illumination light illuminating said first to third image display elements with colors different from each other;

radiating the illumination light to said first to third image display elements; and

causing said first to third image display elements to display an image according to an input video signal and the illumination light.

10. The projector according to claim 1 , wherein a color of the first light is equal to a color of the second light.

11. The projector according to claim 1 , wherein a color of the first fluorescence is yellow, a color of the second fluorescence is yellow and a color of the third light is blue.

12. The projector according to claim 1 , wherein:

said light separation optical system generates both a first red light and a first green light from the first light and generates both a second red light and a second green light from the second light;

the first red light enters said first image display element;

the first green light and the second red light enter said second image display element; and

the second green light and the third light enter said third image display element alternately.

13. The projector according to claim 1 , wherein the first light, the second light, and the third light each comprise a different type of light.

14. The projector according to claim 1 , wherein one of the first light, the second light, and the third light comprises a different type of light than the other two of the first light, the second light, and the third light.

15. The projector according to claim 1 , wherein the second light source includes an annular region on a fluorescent wheel irradiated with an excitation light, the annular region being equally divided into a first region and a second region, and

wherein the first region and the second region, a yellow fluorescent body and a reflection plate are provided alternately.

16. The projector according to claim 1 , wherein the second light source includes a laser light source and a dichroic mirror, and

wherein the dichroic mirror reflects the excitation light from the laser light source toward a fluorescent wheel.

17. The projector according to claim 1 , wherein the second light source outputs blue light and yellow light alternately.

18. The projector according to claim 1 , wherein the second light source includes a plurality of laser light sources and a plurality of dichroic mirrors, and

wherein the dichroic mirrors reflect the excitation light from the laser light sources toward a fluorescent wheel.

19. The projector according to claim 18 , wherein the second light source includes an annular region on the fluorescent wheel irradiated with an excitation light, the annular region being equally divided into a first region and a second region, and

wherein the first region and the second region, a yellow fluorescent body and a reflection plate are provided alternately.