US 11,726,374 B2
Display, display system, image projection system, and movable object
Takato Hada, Osaka (JP); Takahiro Akiyoshi, Fukui (JP); Hiroki Hara, Osaka (JP); and Keiji Sugiyama, Kyoto (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed on Feb. 7, 2022, as Appl. No. 17/666,184.
Application 17/666,184 is a continuation of application No. 17/094,239, filed on Nov. 10, 2020, granted, now 11,275,281.
Application 17/094,239 is a continuation of application No. 16/454,218, filed on Jun. 27, 2019, granted, now 10,871,686, issued on Dec. 22, 2020.
Claims priority of application No. 2018-125448 (JP), filed on Jun. 29, 2018.
Prior Publication US 2022/0155625 A1, May 19, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02F 1/13 (2006.01); G02F 1/1347 (2006.01); G02F 1/1333 (2006.01); G02B 27/01 (2006.01); G03B 21/16 (2006.01)
CPC G02F 1/1347 (2013.01) [G02B 27/0101 (2013.01); G02F 1/133382 (2013.01); G03B 21/16 (2013.01); B60K 2370/334 (2019.05); B60K 2370/785 (2019.05)] 20 Claims
OG exemplary drawing
 
1. A head-up display comprising:
a liquid-crystal panel including a display screen;
a Fresnel lens which is on an opposite side of the liquid-crystal panel from the display screen;
a light-diffusion member between the liquid-crystal panel and the Fresnel lens;
a backlight emitting light toward the Fresnel lens;
a heat sink accommodating the light-diffusion member, the backlight and the Fresnel lens; and
a mirror that forms a virtual image corresponding to an image displayed on the display screen of the liquid-crystal panel, in a target space,
wherein
a surface of the Fresnel lens facing the backlight is uneven.