Digital projection display system with external light source

A digital projection display system comprising a digital projection display, wherein the digital projection display comprises:

• an external light source producing as an output a light beam;
• an internal optics system including
• an integrator that receives the light beam from the light source,
• an illumination lens that receives the light beam from the integrator,
• an illumination fold mirror that receives the light beam from the illumination lens, wherein the illumination fold mirror reflects the light beam through an angle of about 80 degrees,
• a TIR prism that receives the light beam from the illumination fold mirror,
• a digital micromirror device that receives the light beam from the TIR prism, spatially modulates the light beam, and sends the light beam back to the TIR prism in a spatially modulated form,
• a projection lens that receives the light beam in the spatially modulated form from the TIR prism, wherein the projection lens has at least a first projection lens element and a second projection lens element spaced apart from the first projection lens element,
• a projection lens fold mirror disposed between the first projection lens element and the second projection lens element, wherein the light beam passes through the first projection lens element, reflects from the projection lens fold minor, and passes though the second projection lens element, and wherein the projection lens fold mirror reflects the light beam through an angle of about 90 degrees, and
• a projection fold mirror that receives the light beam from the projection lens and redirects the light beam, wherein the projection fold mirror reflects the light beam through an angle of about 72 degrees;
• a housing in which the internal optics system is received, but wherein the external light source is located external to the housing;
• and
• a display screen that receives the light beam from the projection fold mirror, wherein the display screen forms a face of the housing, and wherein the light beam is incident upon the display screen substantially perpendicularly to the display screen.

A digital projection display system, comprising

• a single external light source producing as an output a light beam;
• at least two digital projection displays, wherein each digital projection display an internal optics system, and
• a housing in which the internal optics system is received, but wherein the external light source is located external to the housing
• a display screen that receives the light beam from the internal optics system, wherein the display screen forms a face of the housing;
• and
• an optical fiber extending from the output of the external light source to an input of each of the internal optics systems, wherein each optical fiber conveys a portion of the light beam to the internal optics system of each of the digital projection displays.

A digital projection display system, comprising

• a single external light source producing as an output a light beam;
• at least two digital projection displays, wherein each digital projection display comprises
• a internal optics system, wherein the internal optics system comprises:
• an integrator that receives the light beam from the light source,
• an illumination lens that receives the light beam from the integrator,
• an illumination fold mirror that receives the light beam from the illumination lens,
• a light director that receives the light beam from the illumination fold mirror,
• a digital lit modulator that receives the light beam from the light director and spatially modulates the light beam,
• a projection lens that receives the light beam in the spatially modulated form from the light director, wherein the projection lens has at least a first projection lens element and a second projection lens element spaced apart from the first projection lens element,
• a projection lens fold mirror disposed between the first projection lens element and the second projection lens element, wherein the light beam passes through the first projection lens element, reflects from the projection lens fold mirror, and passes through the second projection lens element, and
• a projection fold mirror that receives the light beam from the projection lens and redirects the light beam, and
• a housing in which the internal optics system is received, but wherein the external light source is located external to the housing;
• and
• an optical fiber extending from the output of the external light source to an input of each of the internal optics systems, wherein each optical fiber conveys a portion of the light beam to the internal optics system of each of the digital projection displays.