Head-mounted projection display system
First Claim
Patent Images
1. A stereoscopic projection display method, comprising:
- projecting a first image in the line-of-sight of a viewer from a first projector including an electro-optical light modulator and a projection lens at a first location adjacent to a first one of viewer'"'"'s eyes, onto a retroreflective projection display screen;
projecting a second image in the line-of-sight of the viewer from a second location adjacent to a second one of viewer'"'"'s eyes, onto the retroreflective projection display screen; and
making the line-of-sight directions of projecting the first and second images dependent on the position of the viewer'"'"'s head, such that said directions change with the line-of-sight of the viewer as the viewer'"'"'s head moves, such that;
the electro-optical light modulator and the projection lens are disposed on a headset to be worn by the viewer during said projecting of the first and second images;
the position of the retroreflective projection display screen is independent of the position of the viewer'"'"'s head;
the first image and the second image comprise differing perspective views, so that the viewer experiences a stereoscopic image effect;
the first image is reflected from the retroreflective projection display screen to the first one of viewer'"'"'s eyes but not to the second one of viewer'"'"'s eyes; and
the second image is reflected from the retroreflective projection display screen to the second one of viewer'"'"'s eyes but not to the first one of viewer'"'"'s eyes.
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Abstract
A head-mounted projection display system is characterized by a pair of head-mounted low-power image projectors mounted adjacent the eyes of the viewer, and aimed to project in a direction along the line of sight of the viewer toward a high-gain, retro-reflective screen. Stereoscopic viewing is enabled by projecting separate images to the right and left projectors. The retro-reflectivity of the screen ensures that the right and left images will be returned to the right and left eye, respectively.
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Citations
3 Claims
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1. A stereoscopic projection display method, comprising:
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projecting a first image in the line-of-sight of a viewer from a first projector including an electro-optical light modulator and a projection lens at a first location adjacent to a first one of viewer'"'"'s eyes, onto a retroreflective projection display screen;
projecting a second image in the line-of-sight of the viewer from a second location adjacent to a second one of viewer'"'"'s eyes, onto the retroreflective projection display screen; and
making the line-of-sight directions of projecting the first and second images dependent on the position of the viewer'"'"'s head, such that said directions change with the line-of-sight of the viewer as the viewer'"'"'s head moves, such that;
the electro-optical light modulator and the projection lens are disposed on a headset to be worn by the viewer during said projecting of the first and second images;
the position of the retroreflective projection display screen is independent of the position of the viewer'"'"'s head;
the first image and the second image comprise differing perspective views, so that the viewer experiences a stereoscopic image effect;
the first image is reflected from the retroreflective projection display screen to the first one of viewer'"'"'s eyes but not to the second one of viewer'"'"'s eyes; and
the second image is reflected from the retroreflective projection display screen to the second one of viewer'"'"'s eyes but not to the first one of viewer'"'"'s eyes. - View Dependent Claims (2, 3)
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Specification