US 11,703,686 B2
Head-up display
Takato Hada, Osaka (JP); and Tomoaki Miyamoto, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed on Jun. 24, 2022, as Appl. No. 17/849,156.
Application 17/849,156 is a continuation of application No. 17/171,484, filed on Feb. 9, 2021, granted, now 11,402,632.
Claims priority of application No. 2020-023267 (JP), filed on Feb. 14, 2020; and application No. 2020-185448 (JP), filed on Nov. 5, 2020.
Prior Publication US 2022/0334390 A1, Oct. 20, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 27/01 (2006.01); B60K 35/00 (2006.01)
CPC G02B 27/0101 (2013.01) [B60K 35/00 (2013.01); B60K 2370/1529 (2019.05); B60K 2370/23 (2019.05); B60K 2370/31 (2019.05); B60K 2370/334 (2019.05); B60K 2370/785 (2019.05); G02B 2027/0118 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A head-up display, comprising:
a display that displays an image; and
a projection optical system that forms a virtual image,
wherein the projection optical system includes a first mirror and a second mirror, the first mirror being disposed above the display and reflecting display light of the image, the second mirror reflecting the display light from the first mirror toward a display medium onto which the virtual image is projected, and
a first expression of 0.3<L1/L2<0.6 is satisfied, where L1 denotes a length of a line segment that connects a center of the display and a center of the first mirror, and L2 denotes a length of a line segment that connects the center of the first mirror and a center of the second mirror,
wherein the second mirror is disposed above the display and below the display medium.