US 12,405,507 B2
Transparent waveguide display with grating lamina that both couple and extract modulated light
Robert D. Brown, Lake Oswego, OR (US); Alastair John Grant, San Jose, CA (US); Wyatt L. Hendrick, San Diego, CA (US); Milan Momcilo Popovich, Leicester (GB); James H. Stanley, Palo Alto, CA (US); and Jonathan David Waldern, Diablo, CA (US)
Assigned to DigiLens Inc., Sunnyvale, CA (US); and Rockwell Collins, Inc., Cedar Rapids, IA (US)
Filed by DigiLens Inc., Sunnyvale, CA (US); and Rockwell Collins, Inc., Cedar Rapids, IA (US)
Filed on Sep. 19, 2022, as Appl. No. 17/933,462.
Application 17/933,462 is a continuation of application No. 17/153,588, filed on Jan. 20, 2021, granted, now 11,448,937.
Application 17/153,588 is a continuation of application No. 15/943,590, filed on Apr. 2, 2018, abandoned.
Application 15/943,590 is a continuation of application No. 14/044,676, filed on Oct. 2, 2013, granted, now 9,933,684, issued on Apr. 3, 2018.
Application 14/044,676 is a continuation in part of application No. 13/844,456, filed on Mar. 15, 2013, granted, now 11,320,571, issued on May 3, 2022.
Claims priority of provisional application 61/849,853, filed on Feb. 4, 2013.
Claims priority of provisional application 61/796,632, filed on Nov. 16, 2012.
Prior Publication US 2023/0081115 A1, Mar. 16, 2023
Int. Cl. G02F 1/29 (2006.01); G02B 5/18 (2006.01); G02B 27/01 (2006.01); G02B 27/42 (2006.01); F21V 8/00 (2006.01)
CPC G02F 1/29 (2013.01) [G02B 5/1814 (2013.01); G02B 27/0172 (2013.01); G02B 27/4272 (2013.01); G02B 6/0013 (2013.01); G02B 2027/0118 (2013.01); G03H 2260/34 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An apparatus for displaying an image comprising:
an input image node for providing image modulated light;
a first optical substrate comprising at least one waveguide layer configured to propagate the modulated light in a first direction, wherein the at least one waveguide layer of the first optical substrate comprises at least one grating lamina configured to extract the modulated light from the first optical substrate along the first direction;
a second optical substrate comprising at least one waveguide layer configured to propagate the modulated light in a second direction, wherein the at least one waveguide layer of the second optical substrate comprises at least one grating lamina configured to extract the modulated light from the second optical substrate along the second direction;
wherein
the at least one grating lamina of the first optical substrate is configured to couple the modulated light into the first optical substrate;
the at least one grating lamina of the second optical substrate is configured to couple the modulated light extracted from the first optical substrate into the second optical substrate; and
the at least one grating lamina of at least one of the first and second optical substrates has a k-vector that varies along the respective direction of light propagation.