US 12,242,100 B2
Wide-area illumination system for displaying image prints in high contrast
Sergiy Vasylyev, Elk Grove, CA (US); and Mykola Masalitin, Sacramento, CA (US)
Assigned to S.V.V. TECHNOLOGY INNOVATIONS, INC., Sacramento, CA (US)
Filed by Sergiy Vasylyev, Elk Grove, CA (US); and Mykola Masalitin, Sacramento, CA (US)
Filed on Dec. 30, 2023, as Appl. No. 18/401,336.
Application 18/401,336 is a continuation of application No. 18/107,998, filed on Feb. 9, 2023, granted, now 11,860,396.
Application 18/107,998 is a continuation of application No. 17/555,329, filed on Dec. 17, 2021, granted, now 11,579,352, issued on Feb. 14, 2023.
Application 17/555,329 is a continuation of application No. 16/679,147, filed on Nov. 8, 2019, granted, now 11,204,458, issued on Dec. 21, 2021.
Claims priority of provisional application 62/760,006, filed on Nov. 12, 2018.
Prior Publication US 2024/0134106 A1, Apr. 25, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. F21V 8/00 (2006.01)
CPC G02B 6/0041 (2013.01) [G02B 6/0055 (2013.01); G02B 6/0065 (2013.01); G02B 6/0003 (2013.01); G02B 6/0056 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wide-area waveguide illumination system, comprising:
an optical waveguide formed by a sheet of an optically transmissive material having a generally uniform thickness and comprising a first broad-area surface, an opposing second broad-area surface, and a first light input edge;
one or more solid-state light sources optically coupled to the first light input edge;
an image print comprising a viewable surface and disposed in an energy receiving relationship with respect to the optical waveguide; and
a two-dimensional pattern of light extraction features distributed over an area of the optical waveguide with variable areal density and defining a plurality of higher-density light extraction areas alternating with a plurality of lower-density light extraction areas,
wherein distances between the light extraction features in the higher-density light extraction areas are generally less than in the lower-density light extraction areas.