Display control device and non-transitory computer readable medium

Patent metadata

Field	Value
Publication number	US-11264000-B2
Application number	US-202016867974-A
Country	US
Kind code	B2
Filing date	May 6, 2020
Priority date	Nov 10, 2017
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

A display control device controls display of a virtual image which is superimposed on foreground of a vehicle by projection of a display light image from an optical unit to a projection area. The display control device sets a projection position of the display light image which is projected in the projection area on the basis of a relative position of a superimposition object on which the virtual image is superimposed, obtains a measurement information from one vehicle height sensor measuring a displacement in a vertical direction occurring in the vehicle, obtains a gradient information indicating a gradient of a road on which the vehicle travels on the basis of three-dimensional map data, and corrects the projection position of the display light image on the basis of the measurement information and the gradient information.

First claim

What is claimed is:

1. A display control device for controlling display of a virtual image which is superimposed on foreground of a vehicle by projection of a display light image from an optical unit to a projection area, comprising:
a position setting unit that sets a projection position of the display light image, which is projected in the projection area, on the basis of a relative position of a superimposition object on which the virtual image is superimposed;
a measurement information obtaining unit that obtains a measurement information from one vehicle height sensor measuring a displacement in a vertical direction occurring in the vehicle;
a gradient information obtaining unit that obtains a gradient information indicating a gradient of a road on which the vehicle travels on the basis of three-dimensional map data; and
an orientation information obtaining unit that obtains orientation information including vehicle speed information indicating a travel speed of the vehicle and curve information indicating a curve radius of the road on which the vehicle travels and that estimates a roll angle of the vehicle based on the vehicle speed information and the curve information;
wherein the position setting unit corrects the projection position of the display light image on the basis of the measurement information and the gradient information and stops correction of the projection position in response to the estimated roll angle exceeding a preliminarily designated upper limit value.

2. The display control device according to claim 1 , wherein
the position setting unit corrects a displacement amount in the vertical direction according to a roll movement of the vehicle included in the measurement information by using the orientation information.

3. The display control device according to claim 1 , wherein
the upper limit value is designated on the basis of a display view angle in the vertical direction of the virtual image in the optical unit.

4. The display control device according to claim 1 , wherein
the position setting unit calculates a pitch angle of the vehicle on the basis of a displacement amount in the vertical direction indicated by the measurement information, and
a pitch angle corresponding to a unit displacement amount occurring in the vertical direction at the time of acceleration of the vehicle is different from a pitch angle corresponding to the unit displacement amount at the time of deceleration.

5. The display control device according to claim 4 , wherein
the vehicle height sensor measures the displacement in the vertical direction at a part rearward of the center in the front-rear direction of the vehicle, and
a pitch angle corresponding to the unit displacement amount at the time of acceleration is smaller than a pitch angle corresponding to the unit displacement amount at the time of deceleration.

6. The display control device according to claim 1 , wherein
the measurement information obtaining unit sets an output value of the vehicle height sensor in a no-load state where a load causing the displacement in the vertical direction in the vehicle does not act as a reference value of the vehicle height sensor.

7. A non-transitory computer readable medium storing a computer program product comprising instructions for controlling display of a virtual image which is superimposed on foreground of a vehicle by projection of a display light image from an optical unit to a projection area, the instructions being configured to, when executed by a processor, cause the processor to:
set a projection position of the display light image, which is projected in the projection area, on the basis of a relative position of a superimposition object on which the virtual image is superimposed;
obtain a measurement information from one vehicle height sensor measuring a displacement in a vertical direction occurring in the vehicle;
obtain a gradient information indicating a gradient of a road on which the vehicle travels on the basis of three-dimensional map data;
correct the projection position of the display light image on the basis of the measurement information and the gradient information;
obtain vehicle speed information indicating a travel speed of the vehicle and curve information indicating a curve radius of the road on which the vehicle travels;
estimate a roll angle of the vehicle based on the vehicle speed information and the curve information; and
stop correction of the projection position in response to the estimated roll angle exceeding a preliminarily designated upper limit value.

8. A display control device for controlling display of a virtual image which is superimposed on foreground of a vehicle by projection of a display light image from an optical unit to a projection area, comprising a processor configured to:
set a projection position of the display light image, which is projected in the projection area, on the basis of a relative position of a superimposition object on which the virtual image is superimposed;
obtain measurement information from one vehicle height sensor measuring a displacement in a vertical direction occurring in the vehicle;
obtain gradient information indicating a gradient of a road on which the vehicle travels on the basis of three-dimensional map data;
correct the projection position of the display light image on the basis of the measurement information and the gradient information;
obtain vehicle speed information indicating a travel speed of the vehicle and curve information indicating a curve radius of the road on which the vehicle travels;
estimate a roll angle of the vehicle based on the vehicle speed information and the curve information; and
stop correction of the projection position in response to the estimated roll angle exceeding a preliminarily designated upper limit value.

Assignees

• Denso Corp

Inventors

• Shibata Shunsuke
• Imanishi Masayuki
• Samma Norio
• Hato Takeshi
• Kawashima Takeshi
• Iguchi Sei
• Banno Hiroto
• Takemori Daisuke

Classifications

• B60K35/50

  Instruments characterised by their means of attachment to or integration in the vehicle (B60K35/231 takes precedence) · CPC title

• B60K35/81

  for controlling displays · CPC title

• B60K35/23

  Head-up displays [HUD] (optical aspects of head-up displays G02B27/01) · CPC title

• B60K35/28

  characterised by the type of the output information, e.g. video entertainment or vehicle dynamics information; characterised by the purpose of the output information, e.g. for attracting the attention of the driver · CPC title

• G09G5/38 Primary

  with means for controlling the display position · CPC title