US 12,436,396 B2
Virtual image display device and optical unit capable of adjusting display position of virtual image
Masayuki Takagi, Azumino (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Nov. 29, 2021, as Appl. No. 17/537,383.
Claims priority of application No. 2020-197885 (JP), filed on Nov. 30, 2020.
Prior Publication US 2022/0171201 A1, Jun. 2, 2022
Int. Cl. G02B 27/01 (2006.01)
CPC G02B 27/0176 (2013.01) [G02B 27/0172 (2013.01); G02B 2027/011 (2013.01); G02B 2027/0132 (2013.01); G02B 2027/0163 (2013.01); G02B 2027/0178 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A virtual image display device comprising:
a first display device that includes a first display element emitting a first imaging light, a first light-guiding system guiding the first imaging light, and a first projection optical system emitting the first imaging light from the first display element to the first light-guiding system, wherein the first display element and the first projection optical system align along a first optical axis of the first projection optical system;
a second display device that includes a second display element emitting a second imaging light, a second light-guiding system guiding the second imaging light, and a second projection optical system emitting the second imaging light from the second display element to the second light-guiding system, wherein the second display element and the second projection optical system align along a second optical axis of the second projection optical system;
a first assembly member that is assembled to the first display device, wherein the first assembly member adjusts a relative position between the first display element and the first projection optical system along the first optical axis;
a second assembly member that is assembled to the second display device, wherein the second assembly member adjusts a relative position between the second display element and the second projection optical system along the second optical axis; and
a post-assembly adjustment device that adjusts a position of a display area in each of the first display element and the second display element based on a difference between a first incident angle of the first imaging light emitted by the first light-guiding system with respect to a position of a first exit pupil and a second incident angle of the second imaging light emitted by the second light-guiding system with respect to a position of a second exit pupil, wherein
the first assembly member comprises a first case member that houses the first display element and a first lens barrel that houses the first projection optical system, and the first case member is configured to move relative to and attach to the first lens barrel,
the first lens barrel comprises a first excavated portion,
the first case member comprises a first protruding portion configured to insert to the first excavated portion,
a first gap is formed between the first excavated portion and the first protruding portion when the first protruding portion is inserted to the first excavated portion,
the second assembly member comprises a second case member that houses the second display element and a second lens barrel that houses the second projection optical system, and the second case member is configured to move relative to and attach to the second lens barrel,
the second lens barrel comprises a second excavated portion,
the second case member comprises a second protruding portion configured to insert to the second excavated portion, and
a second gap is formed between the second excavated portion and the second protruding portion when the second protruding portion is inserted to the second excavated portion.