US 12,352,959 B2
Projection optical system and head-up display device and vehicle including projection optical system and head-up display device
Masahiko Yatsu, Otokuni-gun (JP); Koji Hirata, Otokuni-gun (JP); and Shigeki Hoshino, Otokuni-gun (JP)
Assigned to Maxell, Ltd., Otokuni-gun (JP); and Hitachi Industry & Control Solutions, Ltd., Hitachi (JP)
Filed by Maxell, Ltd., Kyoto (JP); and Hitachi Industry & Control Solutions, Ltd., Hitachi (JP)
Filed on May 23, 2024, as Appl. No. 18/672,690.
Application 18/672,690 is a continuation of application No. 18/315,917, filed on May 11, 2023, granted, now 12,055,714.
Application 18/315,917 is a continuation of application No. 17/506,039, filed on Oct. 20, 2021, granted, now 11,686,937, issued on Jun. 27, 2023.
Application 17/506,039 is a continuation of application No. 16/338,253, granted, now 11,169,376, issued on Nov. 9, 2021, previously published as PCT/JP2016/079540, filed on Oct. 4, 2016.
Prior Publication US 2024/0310627 A1, Sep. 19, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 27/01 (2006.01); G02F 1/1335 (2006.01)
CPC G02B 27/0101 (2013.01) [G02F 1/133526 (2013.01); G02B 2027/0123 (2013.01); G02B 2027/0138 (2013.01); G02B 2027/014 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A vehicle, comprising:
a display panel;
a light source that irradiates light to the display panel;
a first optical system that forms, onto a screen plate, a first optical image of a video displayed on the display panel; and
a second optical system that converts the first optical image formed on the screen plate into a second optical image that is a virtual image, wherein
the first optical system and the second optical system are configured such that an optical axis of the first optical system at an incident surface side of the screen plate is parallel to an optical axis of the second optical system at an emission surface side of the screen plate,
the first optical image formed on the screen plate is an optical image obtained by enlarging the video displayed on the display panel by the first optical system,
the second optical image that is the virtual image is an optical image obtained by enlarging the first optical image formed on the screen plate by the second optical system, and
the second optical image includes a windshield of the vehicle.