US 12,443,042 B2
Head-mounted display apparatus
Tokito Yamaguchi, Azumino (JP); and Masayuki Takagi, Azumino (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Mar. 30, 2023, as Appl. No. 18/192,880.
Claims priority of application No. 2022-060947 (JP), filed on Mar. 31, 2022.
Prior Publication US 2023/0314813 A1, Oct. 5, 2023
Int. Cl. G02B 27/01 (2006.01); G09G 3/00 (2006.01)
CPC G02B 27/0172 (2013.01) [G09G 3/002 (2013.01); G02B 2027/0116 (2013.01); G02B 2027/0178 (2013.01); G09G 2320/0242 (2013.01); G09G 2320/028 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A head-mounted display apparatus comprising:
a circuit configured to function as a control unit that corrects a video;
a display element configured to display the video corrected by the control unit;
a first optical member on which video light corresponding to the video is incident; and
a reflection member configured to reflect the video light from the first optical member to project a virtual image corresponding to the video, wherein
the first optical member and the reflection member correct distortion of the virtual image in a first direction,
the control unit corrects the video based on distortion of the virtual image in a second direction crossing the first direction, and
the control unit corrects the video to satisfy the following equation:
U=ax+bxy
where y represents a coordinate of the video before correction in the first direction, x represents a coordinate of the video before the correction in the second direction, U represents a coordinate of the video after the correction in the second direction, a represents a coefficient corresponding to a length of the video after the correction in the second direction, and b represents a coefficient corresponding to an angle formed between sides of the video after the correction in the first direction and the second direction.