CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is based on PCT filing PCT/JP2019/005748, filed Feb. 18, 2019, which claims priority to JP 2018-054592, filed Mar. 22, 2018, the entire contents of each are incorporated herein by reference.

TECHNICAL FIELD

The present invention relates to an information display apparatus configured to project an image on a windshield of a so-called transportation that moves to carry people such as automobile, train, aircraft, or the like.

BACKGROUND ART

A so-called head-up-display (HUD) apparatus configured to project image light onto a windshield of a vehicle to forma virtual image, thereby displaying traffic information such as route information and traffic congestion information and vehicle information such as remaining fuel amount and cooling water temperature has already been known from, for example, Patent Document 1 below, and downsizing for disposing a main body of the HUD apparatus between the steering wheel and the windshield in front of the driver's seat is desired.

In this type of information display apparatus, for the purpose of making it easier for the driver to recognize the information, it is required to form the virtual image at a plurality of positions in accordance with the visual recognition position of the driver, in other words, to adjust the distance at which the virtual image is formed to the visual recognition position of the driver. Thus, as disclosed in, for example, Patent Document 2 below, there is an information display apparatus in which an image is formed at each of a distant position (long distance) and a close position (short distance) from a driver.

RELATED ART DOCUMENTS

Patent Documents

Patent Document 1: Japanese Patent Application Laid-open Publication No. 2009-229552

Patent Document 2: Japanese Patent Application Laid-open Publication No. 2015-034919

SUMMARY OF THE INVENTION

Problems to be Solved by the Invention

In the above-mentioned conventional HUD apparatus, various types of information are provided to the driver by projecting image light onto the windshield of a vehicle to form a virtual image, but the provision of the information in consideration of larger screen using next-generation technologies such as the big data (high precision 3D map information) and the AI information (predicted hazard information, etc.) has not been sufficiently taken into account. Therefore, as will be described in detail later, there is still room for improvement from the perspective of improving the safety by reducing the viewpoint movement of the driver, and the structure of the HUD apparatus (in particular, the increase in the set volume of the HUD) for making it possible to set the virtual image display position to the optimum position has also not been sufficiently taken into account.

Therefore, an object of the present invention is to provide an information display apparatus capable of displaying information in such a way that the viewpoint movement of the viewer is made smoother in consideration of the viewpoint movement of the driver and the relationship between the traveling speed and the stopping distance of the vehicle.

Means for Solving the Problems

The present invention has been made in light of the above-mentioned background technology and the problem thereof, and an example thereof is an information display apparatus configured to display image information in a transportation. The information display apparatus comprises a HUD apparatus disposed between a windshield of the transportation and an instrument panel of the transportation, wherein the HUD apparatus includes: driver's viewpoint position detecting means configured to detect a viewpoint position of a driver; and a virtual image optical system configured to display a virtual image of the image information in front of the transportation by reflecting light emitted from the HUD apparatus to display the image information by the windshield, and the HUD apparatus is configured to set a display position of the virtual image in accordance with movement of the viewpoint position of the driver who is driving the transportation, detected by the driver's viewpoint position detecting means.

Effects of the Invention

According to the present invention described above, by the information display using a virtual image in accordance with the movement of viewpoint position of a driver who is driving a transportation and further by the information display in consideration of the relationship between the traveling speed and the stopping distance of a vehicle, the viewpoint movement of the driver is reduced and the safer driving is achieved. In particular, by applying to so-called alert display (information) or the like, which is the information for giving a warning of the presence of a pedestrian in front of the vehicle and a preceding vehicle, it is possible to perform the display to a dangerous object farther than the stopping distance of the own vehicle.

