US 12,259,549 B2
Vehicle including a virtual image optical system in a housing having heat dissipation
Go Horiuchi, Kyoto (JP); and Akio Misawa, Kyoto (JP)
Assigned to MAXELL, LTD., Kyoto (JP)
Filed by Maxell, Ltd., Kyoto (JP)
Filed on Mar. 5, 2024, as Appl. No. 18/595,494.
Application 18/595,494 is a continuation of application No. 17/428,994, granted, now 11,953,681, previously published as PCT/JP2019/039845, filed on Oct. 9, 2019.
Claims priority of application No. 2019-030786 (JP), filed on Feb. 22, 2019.
Prior Publication US 2024/0201492 A1, Jun. 20, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 27/01 (2006.01); B60K 35/00 (2024.01); B60R 11/00 (2006.01); B60R 11/02 (2006.01); G02F 1/00 (2006.01); G02F 1/13357 (2006.01)
CPC G02B 27/0101 (2013.01) [B60K 35/00 (2013.01); B60R 11/0235 (2013.01); G02F 1/0045 (2013.01); G02F 1/133603 (2013.01); B60R 2011/0005 (2013.01); B60R 2011/0042 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A vehicle for displaying a virtual image to a driver, the vehicle comprising:
a windshield;
an image display device that includes a backlight and a liquid crystal panel;
a virtual image optical system that forms an optical path of an image light emitted from the liquid crystal panel by being reflected by the windshield or a projecting target; and
an outer housing that accommodates the image display device and the virtual image optical system, wherein the outer housing includes:
an outer case, to which the image display device is to be mounted, that accommodates the virtual image optical system;
an upper cover that covers an upper portion, through which the image light is emitted, of the outer case;
a bottom cover that covers a bottom portion of the outer case,
wherein the bottom cover includes:
in a state of being fixed to the outer case, accommodate a bottom surface of the outer case and the image display device to isolate the bottom surface of the outer case and the image display device from an external space of the outer housing; and
fins on an outer surface thereof;
a control circuit configured to control the image display device; and
a main substrate equipped with the control circuit, wherein
the outer case includes, on a surface facing the bottom cover, a substrate holding surface for holding the main substrate, and
a heat conductive portion having a thermal conductivity higher than that of air is between the control circuit on the main substrate held by the substrate holding surface and the bottom cover.