Projection television device and screen
AssigneeInFocus Corporation
InventorsMark D. Peterson, T. Scott Engle
Life of this patent
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Abstract
A front projection display device is provided including an image-generating source configured to generate an image, a wide angle lens system adapted to receive the image, and a screen. The wide angle lens system may be configured to increase distortion of the image in a first stage and decrease distortion of the image in a second stage. The screen may be configured to receive the image from the wide angle lens system on a first side and reflect the image back to a viewer on the first side. In another embodiment, a screen is provided for a front projection system, the screen may be configured to receive light from a steep angle and may include any number of surface topographies configured to reflect light back to the viewer along a desired viewing plane.
Claims27
A front projection display device comprising:
- a substantially planar front projection screen;
- and
- a wide angle lens system having a first stage to create a distorted intermediate image and a second, wide angle lens stage that causes distortion to substantially cancel the distortion of the intermediate image and to project a substantially non-distorted, planarly focused, image corresponding to the intermediate image at a field angle of at least 100 degrees on the substantially planar front projection screen.
A front projection system comprising:
- a first stage to create a distorted intermediate image;
- and
- a second, wide angle lens stage that causes distortion to substantially cancel the distortion of the intermediate image and to project at a field angle of at least 100 degrees onto a substantially planar front projection screen a substantially non-distorted, planarly focused, image, wherein the first stage and the wide angle lens stage are disposed such that the image path reverses direction as the image travels from the first stage to the second stage.
A display device comprising:
- a substantially planar front projection screen;
- and
- a predistortion system to create a predistorted image from an original image;
- and
- a projection system that causes distortion to substantially cancel the predistortion of the predistorted image and to project a substantially non-distorted, planarly focused, image corresponding to the original image at a field angle of at least 100 degrees to the substantially planar front projection screen.
A front projection display device, comprising:
- an image-generating source configured to generate an image;
- a wide angle lens system adapted to receive the image and configured to increase distortion of the image in a first stage and decrease distortion of the image in a second stage and to project a substantially non-distorted, planarly focused, image at a field angle of at least 100 degrees;
- and
- a substantially planar front projection screen configured to receive the image from the wide angle lens system on a first side and reflect the image back to a viewer from the first side.
Dependencies are inferred from the claim text.