US RE50,622 E1
Head-up display apparatus
Yuki Nagano, Kyoto (JP); Kazuomi Kaneko, Kyoto (JP); Maki Hanada, Kyoto (JP); Akio Misawa, Kyoto (JP); and Kazuyuki Takizawa, Kyoto (JP)
Assigned to MAXELL, LTD., Kyoto (JP)
Appl. No. 17/994,579
Filed by MAXELL, LTD., Kyoto (JP)
PCT Filed Oct. 20, 2016, PCT No. PCT/JP2016/081125
§ 371(c)(1), (2) Date Jul. 20, 2018,
PCT Pub. No. WO2017/134866, PCT Pub. Date Aug. 10, 2017.
Application 17/994,579 is a reissue of application No. 16/071,523, filed on Oct. 20, 2016, granted, now 10,989,929, issued on Apr. 27, 2021.
Claims priority of application No. 2016-020471 (JP), filed on Feb. 5, 2016; application No. 2016-053184 (JP), filed on Mar. 17, 2016; and application No. 2016-054594 (JP), filed on Mar. 18, 2016.
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 27/01 (2006.01); B60K 35/00 (2024.01)
CPC G02B 27/0179 (2013.01) [B60K 35/00 (2013.01); G02B 27/0101 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A head-up display apparatus displaying a virtual image to be overlapped with scenery in front of a vehicle with respect to a driver by projecting a video image onto a windshield of the vehicle, the head-up display apparatus comprising:
a vehicle information acquisition unit configured to acquire various kinds of vehicle information which can be detected by the vehicle;
a controller configured to control display of the [ a ] video image based on the vehicle information acquired by the vehicle information acquisition unit;
a video image display configured to form the video image based on an instruction from the controller;
a mirror configured to reflect [ a video image light of ] the video image formed by the video image display to project onto the [ a ] windshield;
a mirror driver configured to change an angle of the mirror based on an instruction from the controller [ the vehicle information] ; and
a display distance adjusting mechanism configured to adjust display distances of the virtual image to be different for different display areas on the windshield with respect to the driver,
wherein the controller adjusts the angle of the mirror via the mirror driver based on the vehicle information such that the virtual image can be displayed with respect to the driver to be overlapped with the scenery,
wherein the vehicle information includes brightness of an outside of the vehicle and information on a running road, and
wherein the controller adjusts a display position of the virtual image based on a maximum display distance set by the information so as to display such that the virtual image is fitted to and overlapped with a focus which the driver sees [ ,
wherein the controller:
acquires information relating to a first grade of a forward road as the vehicle information from the vehicle information acquisition unit. and information relating to a second grade of a road of a current place;
adjusts, when the first grade is larger than the second grade by a predetermined threshold value or more, the angle of the mirror via the mirror driver such that a display position of the virtual image moves in an upward direction; and
adjusts, when the second grade is larger than the first grade by a predetermined threshold value or more, the angle of the mirror via the mirror driver such that the display position of the virtual image moves in a downward direction. and
wherein the controller adjusts the angle of the mirror via the mirror driver only when a state in which the first grade is larder than the second grade by the predetermined threshold value or more, or a state in which the second grade is larger than the first grade by the predetermined threshold value or more, continues for a predetermined period of time or more] .