System for 3D Image Projections and Viewing
a technology of image projection and viewing system, applied in the field of viewing system, can solve the problems of low luminance efficiency of typical 3-d projection system, insufficient effective brightness, and insufficient color gamut, so as to improve efficiency, reduce the amount of color compensation, and increase the color gamut
Inactive Publication Date: 2014-01-23
DOLBY LAB LICENSING CORP
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- Application Information
AI Technical Summary
Benefits of technology
This approach increases the color space and luminance efficiency of projected images, reduces color compensation requirements, and minimizes crosstalk and color shift, providing improved 3D image quality even at off-axis viewing angles.
Problems solved by technology
The blue shift is undesirable because it can result in crosstalk between left and right images in a 3D image presentation.
One problem realized is that typical 3-D projection systems have low luminance efficiency in that color spaces, color gamut, and effective brightness are inadequate.
Another problem realized is that imbalance between luminance levels in channels of 3D projections decreases luminal efficiency.
Method used
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Embodiment Construction
[0049]This invention addresses some of the problems with the Spectral Separation method for projecting 3D images, specifically this invention aims to improve the off-axis filter characteristics when thin film dielectric (interference) filters (e.g., right eye and left eye filters) are used to implement eyewear (e.g., glasses) for viewing spectrally separated images.
[0050]When light passes through an interference filter at a non- normal angle, the filter characteristics (response shapes, not to be confused with the physical shape of the filter) are changed, and the entire spectral filter response is shifted toward shorter wavelengths (toward the blue). The lifter characteristic response shapes are also adversely affected at larger angles. This is a fundamental attribute of interference filters, and can be compensated for by designing the filter for a specific angle if all of the rays are parallel. In cases where the light bundle is not parallel, as in the case with the use of 3-D gla...
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Shaped glasses have curved surface lenses with spectrally complementary filters disposed thereon. The filters curved surface lenses are configured to compensate for wavelength shifts occurring due to viewing angles and other sources. Complementary images are projected for viewing through projection filters having passbands that pre-shift to compensate for subsequent wavelength shifts. At least one filter may have more than 3 primary passbands. For example, two filters include a first filter having passbands of low blue, high blue, low green, high green, and red, and a second filter having passbands of blue, green, and red. The additional passbands may be utilized to more closely match a color space and white point of a projector in which the filters are used. The shaped glasses and projection filters together may be utilized as a system for projecting and viewing 3D images.
Description
CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. patent application Ser. No. 12 / 530,379 filed on Sep. 8, 2009, which is a national application of PCT application PCT / US2008 / 006007 filed on May 9, 2008 which claims the benefit of the filing date of U.S. Provisional Patent Application Ser. No. 60 / 931,320 filed on May 21, 2007 and U.S. patent application Ser. No. 11 / 801,574 filed on May 9, 2007 and U.S. patent application Ser. No. 11 / 804,602 filed on May 18, 2007, all of which are hereby incorporated by reference.COPYRIGHT NOTICE[0002]A portion of the disclosure of this patent document contains material which is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all copyright rights whatsoever.TECHNICAL FIELD[0003]The present invention relates vie...
Claims
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IPC IPC(8): G02B27/22H04N13/363
CPCG02B27/2228G02B5/285G02B26/008H04N13/324H04N13/334H04N13/363G02B30/23G02B30/00G02B30/34G02C7/104
Inventor RICHARDS, MARTIN J.ALLEN, WILSONGOMES, GARY D.
Owner DOLBY LAB LICENSING CORP