Beam-splitter folded path for rear projection displays
AssigneeKoninklijke Philips Electronics N.V.
InventorJeffrey A. Shimizu
Life of this patent
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Abstract
A rear-projection display system comprises a light engine, a beam-splitter that receives light from the light engine, a projection lens that receives an image from the beam-splitter, a rear-projection screen, and a mirror that receives the image from the projection lens and reflects it onto the screen. The beam-splitter has a reflecting element, receives an image, and reflects the image off the reflecting element at an angle of incidence that is substantially unequal to 45 degrees.
Claims20
A rear-projection display system comprising:
- a light engine;
- a beam-splitter having a reflecting element, the beam-splitter disposed to receive light from the light engine, to receive an image, and for reflecting the image off the reflecting element;
- a projection lens disposed to receive the image from the beam-splitter;
- a mirror disposed to receive the image from the projection lens;
- and
- a rear-projection screen disposed to receive the image from the mirror,
- wherein the image is reflected from the reflecting element of the beam-splitter at an angle of incidence that is substantially unequal to 45 degrees.
A rear-projection display system comprising:
- a light engine;
- beam splitting means for receiving light from the light engine, for receiving an image, and for reflecting the image with an angle of incidence that is substantially unequal to 45 degrees;
- a projection lens disposed to receive the image from the beam splitting means;
- a mirror disposed to receive the image from the projection lens;
- and
- a rear-projection screen disposed to receive the image from the mirror.
A rear-projection display method comprising:
- using light from a light engine to form an image;
- reflecting the image off a reflecting element to a projection lens;
- projecting the image to a mirror;
- and
- reflecting the image from the mirror to a rear-projection screen,
- wherein the image is reflected from the reflecting element at an angle of incidence that is substantially unequal to 45 degrees.
Dependencies are inferred from the claim text.