Projection display device

A projection display device comprising:

• a first display panel;
• a PBS having a first surface and a second surface opposite to each other;
• a light recycling device;
• and
• a projector lens;
• wherein the PBS is adapted to transmit a first type parallel polarized light and to reflect a second type parallel polarized light;
• wherein the first display panel is adapted to transform the second type parallel polarized light, which is reflected by the first surface of the PBS, to the first type parallel polarized light which carries a first image information, and is adapted to reflect the first type parallel polarized light, which carries a first image information, to the first surface of the PBS;
• wherein the light recycling device is adapted to transform the first type parallel polarized light, which is transmitted by the PBS, to the second type parallel polarized light which carries a second image information, and is adapted to reversely transmit the second type parallel polarized light to the second surface of the PBS;
• and
• wherein the projector lens is adapted to receive the first type parallel polarized light, which is transmitted by the PBS and carries the first image information, and the second type parallel polarized light, which is reflected by the PBS and carries the second image information.