US 12,228,739 B2
Display for augmented reality or virtual reality
Mohmed Salim Valera, Sutton Coldfield (GB)
Assigned to Snap Inc., Santa Monica, CA (US)
Filed by Snap Inc., Santa Monica, CA (US)
Filed on Jan. 5, 2024, as Appl. No. 18/405,355.
Application 18/405,355 is a continuation of application No. 17/432,036, granted, now 11,906,743, previously published as PCT/GB2020/050104, filed on Jan. 20, 2020.
Claims priority of application No. 1903037 (GB), filed on Mar. 7, 2019.
Prior Publication US 2024/0142779 A1, May 2, 2024
Int. Cl. G02B 27/01 (2006.01); G02B 27/00 (2006.01); G02B 27/10 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 27/0056 (2013.01); G02B 27/1006 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An augmented reality or virtual reality display device, comprising:
at least one waveguide assembly, comprising at least one first waveguide and at least one second waveguide;
one or more output diffractive optical elements positioned in or on the at least one waveguide assembly configured to couple light out of the at least one first waveguide and at least one second waveguide towards a notional viewing position;
a first input diffractive optical element positioned in or on the at least one first waveguide configured to:
receive light of a first color from a first direction that is at a first angle to a waveguide normal vector and angled away from the one or more output diffractive optical elements; and
couple the light into the at least one first waveguide such that the light of the first color is coupled out of the at least one first waveguide by the one or more output diffractive optical elements in a first range of angles;
a second input diffractive optical element positioned in or on the at least one second waveguide configured to:
receive light of a second color from the first direction; and
couple the light into the at least one second waveguide such that the light of the second color is coupled out of the at least one second waveguide by the one or more output diffractive optical elements in the first range of angles;
a third input diffractive optical element positioned in or on the at least one first waveguide configured to:
receive light of the first color from a second direction that is at a second angle to a waveguide normal vector and angled away from the one or more output diffractive optical elements; and
couple the light into the at least one first waveguide such that the light of the first color is coupled out of the at least one first waveguide by the one or more output diffractive optical elements in a second range of angles; and
a fourth input diffractive optical element positioned in or on the at least one second waveguide configured to:
receive light of the second color from the second direction; and
couple the light into the at least one second waveguide such that the light of the second color is coupled out of the at least one second waveguide by the one or more output diffractive optical elements in the second range of angles;
the first range of angles and the second range of angles being different but partially overlapping.