Lighting device and projection type image display device

An illuminator which emits trichromatic light including components whose wavelengths correspond to three primary colors, respectively, the apparatus comprising:

• a light source to emit the trichromatic light;
• a pair of fly-eye lenses each formed from a plurality of elements and which separates the trichromatic light emitted from the light source into primary-color light components and allows the separated primary-color light components to pass through the plurality of lens elements, thereby uniformizing the trichromatic light output;
• and
• a wavelength-selective optical aperture filter provided adjacent to one of the fly-eye lenses that is farther from the light source and which consists of zones working as predetermined optical apertures, of which one selectively attenuates or shields a component of the trichromatic light, whose wavelength corresponds to at least one of the three primary colors, while the other zones allow the light components whose wavelengths correspond to the other primary colors to pass through.

A projector type image display apparatus comprising:

• an illuminator including:
• a light source to emit trichromatic light;
• and
• a wavelength-selective optical aperture filter provided at the side of the light source from which the trichromatic light goes out and which consists of zones working as predetermined optical apertures, of which one selectively attenuates or shields a component of the trichromatic light, whose wavelength corresponds to at least one of the three primary colors, while the other zones allow the light components whose wavelengths correspond to the other primary colors to pass through;
• and
• a color separation means for separating the trichromatic light output from the wavelength-selective optical aperture filter into components whose wavelengths correspond to the three primary colors, respectively;
• three image display panels to modulate, according to a video signal, the light components separated by the color separation means and whose wavelengths correspond to the three primary colors, respectively;
• a color synthesis means for combining together the light components modulated by the three image display panels and whose wavelengths correspond to the three primary colors, respectively, to produce synthetic light;
• and
• a projection lens to project the synthetic light from the color synthesis means onto a screen.

A projector type image display apparatus comprising:

• an illuminator including:
• a light source to emit trichromatic light;
• a pair of fly-eye lenses each formed from a plurality of lens elements and which separates the trichromatic light emitted from the light source into primary-color light components and allows the separated primary-color light components to pass through, thereby uniformizing the trichromatic light output;
• and
• a wavelength-selective optical aperture filter provided adjacent to one of the fly-eye lenses that is farther from the light source and which consists of zones working as predetermined optical apertures, of which one selectively attenuates or shields a component of the trichromatic light, whose wavelength corresponds to at least one of the three primary colors, while the other zones allow the light components whose wavelengths correspond to the other primary colors to pass through the plurality of lens elements;
• and
• means for splitting the trichromatic light output from the wavelength-selective optical aperture filter into components whose wavelengths correspond to the three primary colors, respectively;
• three image display panels to modulate, according to a video signal, the light components separated by the color separation means from the illumination light and whose wavelengths correspond to the three primary colors, respectively;
• a color synthesis means for combining together the light components modulated by the three image display panels and whose wavelengths correspond to the three primary colors, respectively, to produce synthetic light;
• and
• a projection lens to project the synthetic light from the color synthesis means onto a screen.