Dual projection system with inversely synchronized channel projections
AssigneeDolby Laboratories Licensing Corporation
InventorsStephen M. Jacobs, John Carey, Martin Richards
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Abstract
A dual projection system utilizes a first projector and a second projector to project alternating left and right channel images of a 3D display. The projectors are inversely synchronized such that while the first projector projects a right channel image the other projector projects a left channel image. A projection filter in each projector has left channel properties when the image being projected is a left channel image and right channel properties when the image being projected is a right channel image. The images projected from each projector alternate between left and right channel images approximately once per frame.
Claims51
A projection system, comprising:
- a first projector configured to alternately project a first channel image of a 3D image and then a second channel image of the 3D image;
- and
- a second projector configured to alternately project the second channel image of the 3D image and then the first channel image of the 3D image;
- wherein:
- the first projector and the second projector are inversely synchronized such that when one projector is projecting a first channel image the other projector is projecting a second channel image and visa versa:
- the first projector projects the first channel image in a first set of red, green, and blue wavelengths separate and distinct from a second set of wavelengths used to project the second channel image;
- and
- the wavelengths used to project the first and second wavelength sets comprise narrowband light sources having a full width at half maximum of less than 25 nm.
A projection system, comprising:
- a first projector configured to alternately project at least one first channel image and then at least one second channel image;
- and
- a second projector configured to alternately project at least one second channel image and then at least one first channel image;
- wherein:
- the first projector comprises a first spinning wheel filter comprising a first channel filter and a second channel filter;
- and
- the second projector comprises a second spinning wheel filter comprising a first channel filter and a second channel filter;
- wherein the first channel filter and the second channel filter do not spin in synchronicity.
A method for stereoscopic three-dimensional projection comprising:
- receiving a first sequence of images intended for reception by a viewer's left eye;
- receiving a second sequence of images intended for reception by a viewer's right eye;
- generating a third sequence of images comprising alternating images from said first and said second sequences of images;
- filtering said third sequence of images using a first actively controlled filter with at least two states;
- projecting from a first projector the filtered third sequence of images;
- controlling the first actively controlled filter so as to be in a first state when said first projector is projecting an image from said first sequence and in a second state when said first projector is projecting an image from said second sequence;
- generating a fourth sequence of images comprising alternating images from said first and said second sequences of images;
- filtering said fourth sequence of images using a second actively controlled filter with at least two states;
- projecting from a second projector the filtered fourth sequence of images;
- and
- controlling the second actively controlled filter so as to be in a first state when said second projector is projecting an image from said first sequence and in a second state when said second projector is projecting an image from said second sequence.
A method, comprising the steps of:
- displaying alternating images of a first channel and a second channel via a first display device;
- and
- displaying alternating images of a first channel and a second channel via a second display device;
- wherein the alternating images of the first display device are inversely synchronized to the alternating images of the second display device such that when the first display device is displaying a first channel image, the second display device is displaying a second channel image and visa versa;
- wherein the images of the first and second channels are respectively displayed in first and second sets of lightbands comprise narrowband red, green, and blue lights having a full-width at half max of less than 25 nm;
- and
- wherein the displayed first and second channel images are displayed on a same space of a display screen such that the images over time overlap on the display screen.
Dependencies are inferred from the claim text.