US 12,461,366 B2
Head-up display apparatus
Akio Misawa, Kyoto (JP); and Yuji Fujita, Kyoto (JP)
Assigned to MAXELL, LTD., Kyoto (JP)
Filed by MAXELL, LTD., Kyoto (JP)
Filed on Oct. 28, 2024, as Appl. No. 18/928,735.
Application 18/928,735 is a continuation of application No. 17/423,952, granted, now 12,158,579, previously published as PCT/JP2019/045869, filed on Nov. 22, 2019.
Claims priority of application No. 2019-010985 (JP), filed on Jan. 25, 2019.
Prior Publication US 2025/0053005 A1, Feb. 13, 2025
Int. Cl. B60K 35/00 (2024.01); A61B 5/00 (2006.01); A61B 5/16 (2006.01); B60K 35/23 (2024.01); B60K 35/60 (2024.01); G02B 27/00 (2006.01); G02B 27/01 (2006.01)
CPC G02B 27/0101 (2013.01) [A61B 5/163 (2017.08); A61B 5/6821 (2013.01); B60K 35/00 (2013.01); G02B 27/0093 (2013.01); B60K 35/23 (2024.01); B60K 35/60 (2024.01); B60K 2360/785 (2024.01)] 11 Claims
OG exemplary drawing
 
1. A vehicle comprising:
a windshield;
an image display including a light source and a display element configured to form the image;
an image projector configured to project and reflect image light emitted from the image display onto the windshield to display the virtual image in front of the transportation; and
a driving element configured to move a position of the virtual image projected by the image projector based on information of a viewpoint of the driver detected by a driver's viewpoint detector mounted in the transportation,
wherein, when it is determined that the transportation is not traveling or a traveling speed of the transportation does not reach a predetermined value, the driver's viewpoint detector detects the viewpoint of the driver by using light of an interior light device mounted in the transportation as illumination light or by irradiating a face of the driver with light of the light source of the image display as illumination light without using a dedicated light source, and
wherein, when illuminance based on a signal from an illuminance sensor is less than a predetermined illuminance, the viewpoint of the driver is detected by using the light of the light source of the image display as the illumination light.