US 12,012,170 B2
Screen image projection system for moving object, screen image projection device, optical element for screen image display light diffraction, helmet, and method for projecting screen image
Takaharu Suzuki, Kanagawa (JP); and Hiroshi Ikuta, Kanagawa (JP)
Assigned to SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
Appl. No. 17/253,745
Filed by Sony Semiconductor Solutions Corporation, Kanagawa (JP)
PCT Filed May 16, 2019, PCT No. PCT/JP2019/019422
§ 371(c)(1), (2) Date Dec. 18, 2020,
PCT Pub. No. WO2020/003791, PCT Pub. Date Jan. 2, 2020.
Claims priority of application No. 2018-119700 (JP), filed on Jun. 25, 2018.
Prior Publication US 2021/0269114 A1, Sep. 2, 2021
Int. Cl. B62J 50/22 (2020.01); B60R 11/02 (2006.01); B62J 50/21 (2020.01); B60R 11/00 (2006.01)
CPC B62J 50/22 (2020.02) [B60R 11/0229 (2013.01); B62J 50/225 (2020.02); B60R 2011/004 (2013.01); B60R 2300/205 (2013.01); B60R 2300/8046 (2013.01); B60R 2300/8066 (2013.01); B60Y 2200/12 (2013.01); B60Y 2400/92 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A screen image projection system for moving object comprising:
a screen image projection device; and
an optical element, which is for screen image display light diffraction,
wherein
the screen image projection device is mounted on a moving object,
the screen image projection device is configured such that the screen image display light is projected toward the optical element,
the optical element is arranged in front of human eyes that move along with the moving object, the optical element diffracting screen image display light projected from the screen image projection device and causing the screen image display light to reach the human eyes,
the screen image projection system uses a Maxwellian view,
the screen image projection system has a position information acquisition unit configured to determine a position of the optical element, and
the optical element has an optical characteristic of diffracting only light that enters from a predetermined angle to cause the screen image display light to reach the human eyes, such that a user can visually confirm a screen image only in a case where the optical element is at a predetermined position with respect to the screen image projection device.