US 11,867,921 B2
Short distance illumination of a spatial light modulator using a curved reflector
Ying Geng, Bellevue, WA (US); and Jacques Gollier, Sammamish, WA (US)
Assigned to META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US)
Filed by META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US)
Filed on Apr. 24, 2020, as Appl. No. 16/858,353.
Claims priority of provisional application 62/900,320, filed on Sep. 13, 2019.
Prior Publication US 2021/0080741 A1, Mar. 18, 2021
Int. Cl. G02B 27/28 (2006.01); F21V 8/00 (2006.01); G02B 27/01 (2006.01); H04N 9/31 (2006.01); G02B 17/08 (2006.01)
CPC G02B 27/283 (2013.01) [G02B 6/005 (2013.01); G02B 6/0058 (2013.01); G02B 6/0061 (2013.01); G02B 17/086 (2013.01); G02B 27/0172 (2013.01); G02B 27/0179 (2013.01); G02B 27/286 (2013.01); H04N 9/3152 (2013.01); G02B 2027/0118 (2013.01); G02B 2027/0138 (2013.01); G02B 2027/0178 (2013.01); G02B 2027/0187 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A display device, comprising:
a light source configured to provide illumination light;
a spatial light modulator positioned to receive the illumination light; and
an optical assembly including an optical element and a curved reflector that is distinct and separate from the optical element, the curved reflector being disposed relative to the light source so that at least a portion of the illumination light is reflected by the curved reflector toward the optical element, is reflected by the optical element toward the curved reflector, and is transmitted through the curved reflector,
wherein the optical element is a partial reflector and the optical assembly is disposed relative to the light source and the spatial light modulator so that the at least a portion of the illumination light received by the optical assembly is transmitted through the optical element toward the curved reflector before being reflected by the curved reflector.