Illumination unit having at least two solid state light sources in the same wavelength band

An illumination unit comprising;na plurality of light sources each including a solid-state light-emitting device configured to emit light from a light emission region including a single or a plurality of light-emitting spots; andan optical member having a minor axis and a major axis, and allowing incident light from the solid-state light-emitting device to pass therethrough,wherein the solid-state light-emitting device includes a single chip or a plurality of chips each emitting a light beam,wherein three or more of the light-emitting spots are provided within the whole light sources, to allow the whole light sources to emit light beams in two or more wavelength bands different from one another,wherein two or more of the plurality of the light sources include respective light-emitting spots which emit light in a same wavelength band,wherein one or more of the chips in the whole light sources include a laser diode, wherein the chip configured of the laser diode, in at least one of the plurality of light sources, includes a plurality of light-emitting spots, andwherein directions of far field patterns (FFP) in light emitted from each of the light-emitting spots substantially agree with each other in an optical path of the optical member.

A projection display unit comprising:nan illumination optical system;a spatial modulation device modulating light from the illumination optical system based on an input picture signal to generate imaging light; anda projection optical system projecting the imaging light generated by the spatial modulation device,the illumination optical system including a plurality of light sources each including a solid-state light-emitting device configured to emit light from a light emission region including a single or a plurality of light-emitting spots, and an optical member having a minor axis and a major axis, and allowing incident light from the solid-state light-emitting device to pass therethrough,wherein the solid-state light-emitting device includes a single chip or a plurality of chips each emitting light beam,wherein three or more of the light-emitting spots are provided within the whole light sources, to allow the whole light sources to emit light beams in two or more wavelength bands different from one another,wherein two or more of the plurality of the light sources include respective light-emitting spots which emit light in a same wavelength band,wherein one or more of the chips in the whole light sources include a laser diode, wherein the chip configured of the laser diode, in at least one of the plurality of light sources, includes a plurality of light-emitting spots, andwherein directions of far field patterns (FFP) in light emitted from each of the light-emitting spots substantially agree with each other in an optical path of the optical member.

A direct view display unit comprising:nan illumination optical system;a spatial modulation device modulating light from the illumination optical system based on an input picture signal to generate imaging light;a projection optical system projecting the imaging light generated by the spatial modulation device; anda transmissive screen displaying the imaging light projected from the projection optical system,the illumination optical system including a plurality of light sources each including a solid-state light-emitting device configured to emit light from a light emission region including a single or a plurality of light-emitting spots, and an optical member having a minor axis and a major axis, and allowing incident light from the solid-state light-emitting device to pass therethrough,wherein the solid-state light-emitting device includes a single chip or a plurality of chips each emitting light beam,wherein three or more of the light-emitting spots are provided within the whole light sources, to allow the whole light sources to emit light beams in two or more wavelength bands different from one another,wherein two or more of the plurality of the light sources include respective light-emitting spots which emit light in a same wavelength band,wherein one or more of the chips in the whole light sources include a laser diode, wherein the chip configured of the laser diode, in at least one of the plurality of light sources, includes a plurality of light-emitting spots, andwherein directions of far field patterns (FFP) in light emitted from each of the light-emitting spots substantially agree with each other in an optical path of the optical member.