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US 5,594,563 AGranted
High resolution subtractive color projection system
AssigneeHoneywell Inc.
InventorBrent D. Larson
Life of this patent
Estimating the term…
Abstract
A color projector for forming a high resolution image through a plurality of stacked display panels. The projector employs subtractive color technology to project a real or virtual color image. In order to provide a highly focused image free from parallax effects, a dichroic mirror assembly is provided to reflect the light exiting the display panels and compensate for differences in optical path lengths between display panels while maintaining high resolution focusing capability. Light output averaging means are provided to eliminate additional parallax effects. High resolution optics are provided between the dichroic mirror assembly and the projection screen in order to provide focus for the image.
Claims32
A color projection system comprising:
- light producing means;
- a plurality of stacked, high resolution display panels with individual picture elements which modulate light produced by said light producing means to form an image;
- high resolution compensating means to compensate for parallax artifacts arising from said plurality of stacked high resolution display panels, wherein the high resolution compensating means includes refracting media which retracts the modulated light, the refracting media includes refracting surfaces which receives the modulated light such that all of said refracting surfaces are substantially non-tilted with respect to the plurality of stacked display panels;
- and
- high resolution optical focusing means to focus the modulated light and form a real or virtual composite image.
2 more elements
A color projection system comprising:
- light producing means;
- a plurality of stacked, high resolution display panels with individual picture elements in the path of said light to modulate the intensity of light produced by said light producing means to form an image;
- and
- a plurality of stacked, curved dichroic mirrors, wherein each of said mirrors selectively reflects and focuses the light modulated by one of the high resolution display panels, to form a real or virtual composite image of said plurality of stacked high resolution display panels.
1 more element
A color projection system comprising:
- light producing means;
- a plurality of stacked, high resolution display panels with individual picture elements which modulate light produced by said light producing means to form an image;
- high resolution compensating means to compensate for parallax artifacts arising from said plurality of stacked high resolution display panels, high resolution compensating means comprising:
- a first plurality of dichroic mirrors;
- and
- a second plurality of dichroic mirrors, the second plurality of dichroic mirrors provides compensation for resolution limiting effects introduced by the first plurality of dichroic mirrors;
- and
- high resolution optical focusing means to focus the modulated light and form a real or virtual composite image.
5 more elements
A color projection system comprising:
- light producing means;
- a plurality of stacked, high resolution display panels with individual picture elements which modulate light produced by said light producing means to form an image;
- high resolution compensating means to compensate for parallax artifacts arising from said plurality of stacked high resolution display panels, wherein said high resolution compensating means comprises a plurality of very thin stacked dichroic pellicle mirrors and the index of refraction between adjacent dichroic mirrors is the same as the index of refraction in the space separating the plurality of dichroic mirrors from said plurality of display panels;
- and
- high resolution optical focusing means to focus the modulated light and form a real or virtual composite image.
2 more elements
A color projection system comprising:
- light producing means;
- a plurality of stacked, high resolution display panels with individual picture elements which modulate light produced by said light producing means to form an image;
- high resolution compensating means to compensate for parallax artifacts arising from said plurality of stacked high resolution display panels, wherein said high resolution compensation means includes an optical collection angle sufficiently large to average multiple angular interference fringes arising from the passage of uncollimated rays through the plurality of display panels;
- and
- high resolution optical focusing means to focus the modulated light and form a real or virtual composite image;
- and
- wherein a numerical aperture corresponding to the optical collection angle is approximately 2np/D or greater,
- wherein is the refractive index of the medium between successive pairs of the plurality of display panels, p is the distance, in millimeters, between adjacent pixels within each of the display panels, and D is the largest separation, in millimeters, between any two of the plurality of display panels.
5 more elements
A color projection system comprising:
- light producing means;
- a plurality of stacked, high resolution display panels with individual picture elements which modulate light produced by said light producing means to form an image;
- high resolution compensating means to compensate for parallax artifacts arising from said plurality of stacked high resolution display panels, wherein said high resolution compensation means includes an optical collection angle sufficiently large to average multiple angular interference fringes arising from the passage of uncollimated rays through the plurality of display panels;
- and
- high resolution optical focusing means to focus the modulated light and form a real or virtual composite image;
- and
- wherein:
- the optical collection angle is defined by the focal length of the focusing means and the pupil diameter of an observer's eye;
- and
- a numerical aperture corresponding to the optical collection angle is approximately 2np/D or greater, where n is the refractive index of the medium between successive pairs of the plurality of display panels, p is the distance, in millimeters, between adjacent pixels within each of the display panels, and D is the largest separation, in millimeters between and two of the plurality of display panels.
7 more elements
A color projection system comprising:
- light producing means, wherein light produced is substantially uncollimated;
- a plurality of stacked, high resolution display panels with individual picture elements which modulate light produced by said light producing means to form an image;
- high resolution compensating means to compensate for parallax artifacts arising from said plurality of stacked high resolution display panels, wherein said high resolution compensation means includes an optical collection angle sufficiently large to average multiple angular interference fringes arising from the passage of uncollimated rays through the plurality of display panels;
- and
- high resolution optical focusing means to focus the modulated light and form a real or virtual composite image;
- and
- wherein the optical collection angle is defined by the focal length of the focusing means and the pupil diameter of an observer's eye.
4 more elements
A color projection system comprising:
- light producing means, wherein light produced is substantially uncollimated;
- a plurality of stacked, high resolution display panels with individual picture elements which modulate light produced by said light producing means to form an image;
- high resolution compensating means to compensate for parallax artifacts arising from said plurality of stacked high resolution display panels, wherein said high resolution compensation means includes an optical collection angle sufficiently large to average multiple angular interference fringes arising from the passage of uncollimated rays through the plurality of display panels;
- and
- high resolution optical focusing means to focus the modulated light and form a real or virtual composite image;
- and
- wherein at least one of the plurality of display panels is misaligned from the other display panels.
4 more elements
Dependencies are inferred from the claim text.