3D projection system using laser light sources
First Claim
1. 3D viewing glasses comprising passbands each configured to transmit a corresponding set of at least one projected narrowband wavelength when viewed through the glasses at normal angles and when viewed through the glasses at off-normal angles through the glasses;
- wherein the sets of projected narrowband wavelengths are all transmitted at first positions of their corresponding passbands when viewed normally and, when viewed at increasingly off-normal angles, the sets of projected narrowband wavelengths are transmitted at positions that are increasingly further from the first positions and increasingly closer to long wavelength ends of the passbands that do not transmit any of the projected narrowband wavelengths when viewed normally; and
the projected narrowband wavelengths are laser wavelengths.
1 Assignment
0 Petitions
Accused Products
Abstract
Laser or narrow band light sources are utilized to from left (R1, G1, B1) and right (R2,G2;B2,) images of a 3D projection. Under off-axis viewing of projections (i.e. oblique incident angles) the passbands of the viewing filters in the glasses are blue-shifted, which has the potential of cause crosstalk and/or loss of energy/brightness in any channel or color. This blue-shift is compensated via the combined use of any of viewing passbands (220) encompassing the associated projected lightband (222) and a red-shift passband (224) selection of passband wavelengths that maximize usability of the passband as it “shifts” due to varying or increasing angles of off-axis viewing), curvature of viewing filters, and guard bands between light bands of adjacent channels. Implemented with any number of light sources, additional light sources are utilized to affect a desirable increase in color gamut.
22 Citations
20 Claims
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1. 3D viewing glasses comprising passbands each configured to transmit a corresponding set of at least one projected narrowband wavelength when viewed through the glasses at normal angles and when viewed through the glasses at off-normal angles through the glasses;
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wherein the sets of projected narrowband wavelengths are all transmitted at first positions of their corresponding passbands when viewed normally and, when viewed at increasingly off-normal angles, the sets of projected narrowband wavelengths are transmitted at positions that are increasingly further from the first positions and increasingly closer to long wavelength ends of the passbands that do not transmit any of the projected narrowband wavelengths when viewed normally; and the projected narrowband wavelengths are laser wavelengths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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- 13. 3D glasses comprising at least one passband configured to transmit at least one wavelength of laser light, the passband comprising a normal pass area in a portion of the passband closer to a short wavelength end of the passband than a long wavelength end of the passband, the normal pass area configured to transmit the at least one wavelength of laser light when normally incident to the glasses, and an off-normal pass area on one side of the normal pass area configured to transmit the narrowband laser light when not normally incident to the glasses and which does not transmit any laser light wavelengths of a projected 3D image when viewed at a normal angle, and wherein a filter comprising the at least one passband is configured to reject red, blue, and green wavelengths of a channel opposite a channel corresponding to the at least one wavelength of laser light.
- 17. A 3D viewing filter configured to transmit all laser lightbands of first channel of a 3D image in first predetermined wavelength pass areas of the filter when viewed normally, and wherein off-axis viewing through the filter shifts properties of the filter such that the laser lightbands are transmitted in second predetermined wavelength pass areas of the filter at a same wavelength but having a relative position within the filter that is shifted when compared to the first predetermined wavelength pass areas, and wherein the second predetermined wavelength pass areas of the filter do not transmit any of the laser lightbands of the 3D image when viewed normally, and wherein the 3D viewing filter comprises filter properties configured to reject wavelengths of a second channel of the 3D image comprising at least one green wavelength.
Specification