Patent ID: 8711290

Claim:
A projection-type video image display apparatus, comprising: an excitation light source which emits excitation light; and a phosphor, said phosphor including a plurality of fluorescent portions which emit light of a plurality of colors as they are excited by excitation light from said excitation light source, respectively; a phosphor drive portion which drives said phosphor such that said plurality of fluorescent portions emit light within 1 frame period; a video signal analysis portion which analyzes a video signal for each piece of image data in each frame; and an excitation light source drive portion which sets an intensity of the excitation light emitted to each of said plurality of fluorescent portions in accordance with a result of analysis by said video signal analysis portion, wherein said plurality of fluorescent portions include a first fluorescent portion which emits colored light having a first wavelength, and a second fluorescent portion which emits colored light having a second wavelength, which is higher in luminous efficiency than said colored light having the first wavelength and selected to provide an effect to make smaller a color reproduction range to an image, and said excitation light source drive portion sets a first intensity of excitation light emitted to said first fluorescent portion and a second intensity of excitation light emitted to said second fluorescent portion in accordance with the result of analysis by said video signal analysis portion.