	US 12,081,917 B2
	Projection system and method for uniformity correction
Jerome D. Shields, Lumberton, NJ (US)
Assigned to Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
Appl. No. 17/796,423
Filed by Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
PCT Filed Jan. 28, 2021, PCT No. PCT/US2021/015554 § 371(c)(1), (2) Date Jul. 29, 2022, PCT Pub. No. WO2021/155044, PCT Pub. Date Aug. 5, 2021.
Claims priority of provisional application 62/967,655, filed on Jan. 30, 2020.
Claims priority of provisional application 63/125,202, filed on Dec. 14, 2020.
Prior Publication US 2023/0344970 A1, Oct. 26, 2023
Int. Cl. H04N 9/31 (2006.01); G03B 21/00 (2006.01); G06V 10/141 (2022.01); G06V 10/56 (2022.01); G06V 10/60 (2022.01); H04N 5/52 (2006.01); H04N 5/74 (2006.01)

CPC H04N 9/3182 (2013.01) [G03B 21/008 (2013.01); G06V 10/141 (2022.01); G06V 10/56 (2022.01); G06V 10/60 (2022.01); H04N 5/52 (2013.01); H04N 5/74 (2013.01)]

20 Claims

1. A projection system, comprising:

a light source configured to emit a light in response to image data;

an optical system configured to project the light emitted by the light source; and

a controller configured to:

receive an input associated with a plurality of light values corresponding to a plurality of primary lightfields for a first image;

convert the input associated with the plurality of light values to a plurality of projector primary color values;

determine a gain map based on the plurality of projector primary color values;

apply the gain map to the first image to perform a chromaticity uniformity correction by adjusting levels of the plurality of primary lightfields so that a primary mixture is the same over an image frame, thereby generating a second image; and

project the second image with the optical system, wherein the second image is corrected by the gain map.