Back to results
US 11,539,927 B2Granted
Digital point spread function (DPSF) and dual modulation projection (including lasers) using DPSF
AssigneeDolby Laboratories Licensing Corporation
InventorMartin J. Richards
Life of this patent
Estimating the term…
Abstract
A digital PSF for use in a dual modulation display. The invention allows the use of less than optimal point spread (PSF) functions in the optics between the pre-modulator and primary modulator of a dual modulation projection system. This technique uses multiple halftones per frame in the pre-modulator synchronized with a modified bit sequence in the primary modulator to produce a compensation image that reduces the errors produced by the sub-optimal PSF. The invention includes the application to dual modulation and dual modulated 3D viewing systems.
Claims8
A projector, comprising:
- a pre-modulator configured to modulate light into a halftone image;
- a primary modulator configured to further modulate light of the halftone image into a desired image;
- and
- one or more relay optics configured to transfer the light of the halftone image from the pre-modulator to the primary modulator;
- where imperfections of a Point Spread Function (PSF) of the relay optics are compensated by modifying a backlight image used to energize the pre-modulator;
- wherein the imperfections of a Point Spread Function (PSF) of the relay optics are compensated by modifying the backlight image so as to account for wavelength differences and associated wavelength dependent PSF changes between different wavelengths of multiple viewing channels of a 3D image.
3 more elements
A projector, comprising:
- a pre-modulator configured to modulate light into a halftone image;
- a primary modulator configured to further modulate light of the halftone image into a desired image;
- and
- one or more relay optics configured to transfer the light of the halftone image from the pre-modulator to the primary modulator;
- where imperfections of a Point Spread Function (PSF) of the relay optics are compensated by modifying a backlight image used to energize the pre-modulator;
- wherein the halftone image is changed multiple times per frame, and wherein the bit sequences on the pre-modulator and primary modulator are synchronized, such that the average across the frame is a product of the average of the pre-modulator images through the relay optics and the primary modulator image.
3 more elements
Dependencies are inferred from the claim text.