JP2012108364A5 - - Google Patents

Description

The polarization conversion illumination device of the present invention may include a lens that shapes the shape of the light from the light source. Further, in the polarization conversion illumination device of the present invention, it may include a lens to integer form light shape from the polarization conversion illumination system.

Claims (14)

A right angle prism having an inclined surface, a first surface, and a second surface, and an apex angle between the inclined surface and the second surface being approximately 30 degrees;
A light source disposed on the first surface side and emitting light so as to enter the first surface of the right-angle prism;
A quarter-wave plate and a reflector disposed on the slope so that light incident from the first surface is incident and reflected;
A reflective polarization separator disposed on the second surface so that light reflected by the reflector enters the light;
An optical member disposed on the second surface side so that light transmitted through the polarization separator enters and exits in a predetermined direction, and
The polarization separator is at least light from the light source so that the light reflected by the polarization separator enters the polarization separator through the quarter-wave plate and the reflector and is separated. And a polarization conversion illumination device having polarization separation characteristics in a light incident angle range in which light having passed through the quarter-wave plate and the reflector enters. The optical member is a right-angle prism having an inclined surface, a first surface, and a second surface, and an apex angle between the inclined surface and the second surface being approximately 30 degrees.
The polarization conversion illumination device according to claim 1, wherein a reflector or a polarization separator is disposed on a slope of the right-angle prism. The optical member is a right-angle prism having an inclined surface, a first surface, and a second surface, and an apex angle between the inclined surface and the second surface being approximately 30 degrees.
A polarization separator is disposed on the slope of the right-angle prism,
The polarization conversion illumination device according to claim 1, wherein another optical member is arranged so that light transmitted through the polarization separator is incident.   The polarization conversion illumination device according to claim 3, wherein the inclined surface of the right-angle prism as the optical member has a curved surface shape. A polarization conversion illumination device comprising a plurality of polarization conversion illumination devices according to claim 3. The optical member is a substantially rectangular parallelepiped optical block having at least a light incident surface on which light transmitted through the polarization separator enters and a surface substantially orthogonal to the light incident surface,
2. The polarization separator composed of a plurality of polarization separation surfaces having an inclination of about 30 degrees is disposed on a surface substantially orthogonal to the light incident surface of the optical block. Polarization conversion illumination device. The polarization separator is a polarization conversion illumination device of any crab according to claims 1 to 6, characterized in that configured the different resin film refractive index in the reflective polarization separating film laminated on the multilayer. The polarization separator is a polarization conversion illumination device of any crab according of claims 1 to 7, characterized in that it is constituted by a reflective polarization separating film of the wire grid type. The polarization separator is composed of a wire grid polarizer,
The wire grid polarizer, the polarization conversion illumination device of any crab according of claims 1 to 7, characterized in that the conductor is arranged so as to unevenly distributed to the uneven substrate. Polarization conversion illumination device of any crab according to claims 1 to 9, characterized by comprising a lens for shaping the light shape from the light source. Polarization conversion illumination system having a lens for integer form the light shape of the polarization conversion illumination device of any crab of claims 1 to claim 9. A display device using a polarization conversion illumination device of any crab according to claims 1 to 11. A projection display device comprising the polarization conversion illumination device according to claim 1 and a transmissive liquid crystal display element. A projection display device comprising the polarization conversion illumination device according to any one of claims 3 to 6 and a reflective liquid crystal display element.