US 12,405,477 B2
Image display device
Kazuya Kamakura, Matsumoto (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Aug. 15, 2023, as Appl. No. 18/450,393.
Claims priority of application No. 2022-130279 (JP), filed on Aug. 17, 2022.
Prior Publication US 2024/0061259 A1, Feb. 22, 2024
Int. Cl. G02B 27/01 (2006.01)
CPC G02B 27/0176 (2013.01) [G02B 2027/0154 (2013.01); G02B 2027/0178 (2013.01); G02B 2027/0194 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An image display device comprising:
a display element;
an optical member for imaging;
a circuit board;
an optical case configured to accommodate the display element and the optical member;
a metallic frame configured to support the circuit board from below; and
an exterior case configured to accommodate the optical case and the metallic frame, wherein
the metallic frame is disposed above the optical case,
the exterior case includes an upper case and a lower case, and includes a first seal member at a first facing portion between the upper case and the lower case,
the lower case includes a middle frame and a lower cover,
the middle frame is disposed between the upper case and the lower cover, and
the circuit board is disposed between the middle frame and the lower cover, wherein
the exterior case includes the first seal member at the first facing portion between the upper case and the middle frame, and
the exterior case includes a second seal member at a second facing portion between the lower cover and the middle frame.