Illumination unit, projection display unit, and direct-view display unit

A projection display unit including an illumination optical system, a spatial modulating device, and a projection optical system, the spatial modulating device modulating light from the illumination optical system based on an input image signal to generate image light, the projection optical system projecting the image light generated by the spatial modulating device, the illumination optical system comprising:

• one or more light sources each including a solid-state light-emitting device, the solid-state light-emitting device emitting light from a light emission region thereof, the light emission region including a plurality of light-emitting spots arranged along a predetermined direction;
• and
• an optical member allowing light incident from the solid-state light-emitting device to pass therethrough and exit therefrom,
• wherein the optical member includes one or more coupling lenses changing a directivity angle of the light incident from the solid-state light-emitting device,
• wherein the solid-state light-emitting device includes a single chip or a plurality of chips, the single chip emitting light in a single wavelength range or light in a plurality of wavelength ranges, the plurality of chips emitting light in a same wavelength range or light in wavelength ranges different from one another,
• wherein the single chip or the plurality of chips in the solid-state light-emitting device having the plurality of light-emitting spots each include a laser diode,
• wherein a first coupling lens of the one or more coupling lenses has a smaller lens effect along the predetermined direction than a lens effect along a direction orthogonal to the predetermined direction in the light emission region, the first coupling lens on which laser light emitted from the solid-state light-emitting device having the plurality of light-emitting spots is incident,
• wherein the first coupling lens includes one or more cylindrical lenses not having a lens effect along the predetermined direction, and
• wherein the first coupling lens includes a first cylindrical lens and a second cylindrical lens, the first cylindrical lens and the second cylindrical lens being a concave lens and a convex lens, respectively.

A direct-view display unit including an illumination optical system, a spatial modulating device, a projection optical system, and a transmissive screen, the spatial modulating device modulating light from the illumination optical system based on an input image signal to generate image light, the projection optical system projecting the image light generated by the spatial modulating device, the transmissive screen displaying the image light projected from the projection optical system, the illumination optical system comprising:

• one or more light sources each including a solid-state light-emitting device, the solid-state light-emitting device emitting light from a light emission region thereof, the light emission region including a plurality of light-emitting spots arranged along a predetermined direction;
• and
• an optical member allowing light incident from the solid-state light-emitting device to pass therethrough and exit therefrom,
• wherein the optical member includes one or more coupling lenses changing a directivity angle of the light incident from the solid-state light-emitting device,
• wherein the solid-state light-emitting device includes a single chip or a plurality of chips, the single chip emitting light in a single wavelength range or light in a plurality of wavelength ranges, the plurality of chips emitting light in a same wavelength range or light in wavelength ranges different from one another,
• wherein the single chip or the plurality of chips in the solid-state light-emitting device having the plurality of light-emitting spots each include a laser diode,
• wherein a first coupling lens of the one or more coupling lenses has a smaller lens effect along the predetermined direction than a lens effect along a direction orthogonal to the predetermined direction in the light emission region, the first coupling lens on which laser light emitted from the solid-state light-emitting device having the plurality of light-emitting spots is incident,
• wherein the first coupling lens includes one or more cylindrical lenses not having a lens effect along the predetermined direction, and
• wherein the first coupling lens includes a first cylindrical lens and a second cylindrical lens, the first cylindrical lens and the second cylindrical lens being a concave lens and a convex lens, respectively.

An illumination unit comprising:

• one or more light sources each including a solid-state light-emitting device, the solid-state light-emitting device emitting light from a light emission region thereof, the light emission region including a plurality of light-emitting spots arranged along a predetermined direction;
• and
• an optical member allowing light incident from the solid-state light-emitting device to pass therethrough and exit therefrom,
• wherein the optical member includes one or more coupling lenses changing a directivity angle of the light incident from the solid-state light-emitting device,
• wherein a first coupling lens of the one or more coupling lenses has a smaller lens effect along the predetermined direction than a lens effect along a direction orthogonal to the predetermined direction in the light emission region, the first coupling lens on which laser light emitted from the solid-state light-emitting device having the plurality of light-emitting spots is incident,
• wherein the first coupling lens includes one or more cylindrical lenses not having a lens effect along the predetermined direction, and
• wherein the first coupling lens includes a cylindrical lens and an anamorphic lens, the cylindrical lens and the anamorphic lens being a concave lens and a convex lens, respectively.

An illumination unit comprising:

• one or more light sources each including a solid-state light-emitting device, the solid-state light-emitting device emitting light from a light emission region thereof, the light emission region including a plurality of light-emitting spots arranged along a predetermined direction;
• and
• an optical member allowing light incident from the solid-state light-emitting device to pass therethrough and exit therefrom,
• wherein the optical member includes one or more coupling lenses changing a directivity angle of the light incident from the solid-state light-emitting device,
• wherein a first coupling lens of the one or more coupling lenses has a smaller lens effect along the predetermined direction than a lens effect along a direction orthogonal to the predetermined direction in the light emission region, the first coupling lens on which laser light emitted from the solid-state light-emitting device having the plurality of light-emitting spots is incident,
• wherein the first coupling lens includes one or more cylindrical lenses not having a lens effect along the predetermined direction, and
• wherein the first coupling lens includes a first cylindrical lens and a second cylindrical lens, the first cylindrical lens and the second cylindrical lens being a concave lens and a convex lens, respectively.

A projection display unit including an illumination optical system, a spatial modulating device, and a projection optical system, the spatial modulating device modulating light from the illumination optical system based on an input image signal to generate image light, the projection optical system projecting the image light generated by the spatial modulating device, the illumination optical system comprising:

• one or more light sources each including a solid-state light-emitting device, the solid-state light-emitting device emitting light from a light emission region thereof, the light emission region including a plurality of light-emitting spots arranged along a predetermined direction;
• and
• an optical member allowing light incident from the solid-state light-emitting device to pass therethrough and exit therefrom,
• wherein the optical member includes one or more coupling lenses changing a directivity angle of the light incident from the solid-state light-emitting device,
• wherein a first coupling lens of the one or more coupling lenses has a smaller lens effect along the predetermined direction than a lens effect along a direction orthogonal to the predetermined direction in the light emission region, the first coupling lens on which laser light emitted from the solid-state light-emitting device having the plurality of light-emitting spots is incident,
• wherein the first coupling lens includes one or more cylindrical lenses not having a lens effect along the predetermined direction, and
• wherein the first coupling lens includes a cylindrical lens and an anamorphic lens, the cylindrical lens and the anamorphic lens being a concave lens and a convex lens, respectively.

A direct-view display unit including an illumination optical system, a spatial modulating device, a projection optical system, and a transmissive screen, the spatial modulating device modulating light from the illumination optical system based on an input image signal to generate image light, the projection optical system projecting the image light generated by the spatial modulating device, the transmissive screen displaying the image light projected from the projection optical system, the illumination optical system comprising:

• one or more light sources each including a solid-state light-emitting device, the solid-state light-emitting device emitting light from a light emission region thereof, the light emission region including a plurality of light-emitting spots arranged along a predetermined direction;
• and
• an optical member allowing light incident from the solid-state light-emitting device to pass therethrough and exit therefrom,
• wherein the optical member includes one or more coupling lenses changing a directivity angle of the light incident from the solid-state light-emitting device,
• wherein a first coupling lens of the one or more coupling lenses has a smaller lens effect along the predetermined direction than a lens effect along a direction orthogonal to the predetermined direction in the light emission region, the first coupling lens on which laser light emitted from the solid-state light-emitting device having the plurality of light-emitting spots is incident,
• wherein the first coupling lens includes one or more cylindrical lenses not having a lens effect along the predetermined direction, and
• wherein the first coupling lens includes a cylindrical lens and an anamorphic lens, the cylindrical lens and the anamorphic lens being a concave lens and a convex lens, respectively.