Optical illumination apparatus

An optical illumination apparatus, comprising:

• a polarization conversion device for splitting light from a light source into first and second light beams polarized in first and second manners and for converting one of first and second light beams into light polarized in an identical manner as the other of the first and second light beams;
• a cholesteric liquid crystal device for switching colors of the first and second light beams on a time-divisional basis;
• and
• an optical integrator system for illuminating a display panel with the first and second light beams, the optical integrator system comprising a first lens array having a first lens cell, and a second lens array having a second lens cell;
• wherein the first and second light beams pass through the first lens cell and are imaged on the second lens cell.

An optical illumination apparatus, comprising:

• a polarization conversion device for splitting light from a light source into first and second light beams polarized in different manners and for converting one of first and second light beams into light polarized in an identical manner as the other of the first and second light beams;
• a liquid crystal hologram device for switching colors of the first and second light beams on a time-divisional basis;
• and
• an optical integrator system for illuminating a display panel with the first and second light beams, the optical integrator system comprising a first lens array having a first lens cell, and a second lens array having a second lens cell;
• wherein the first and second light beams pass through the first lens cell and are imaged on the second lens cell.

An optical illumination apparatus, comprising:

• a polarization conversion device for splitting light from a light source into first and second light beams polarized in different manners and for converting one of first and second light beams into light polarized in an identical manner as the other of the first and second light beams;
• a diffraction grating for separating colors of the first and second light beams;
• a reflective light valve for switching the colors of the first and second light beams on a time-divisional basis;
• and
• an optical integrator system for illuminating a display panel with the first and second light beams, the optical integrator system comprising a first lens array having a first lens cell, and a second lens array having a second lens cell;
• wherein the first and second light beams pass through the first lens cell and are imaged on the second lens cell.