US 12,223,861 B2
Gradient change detection system, display system using same, and storage medium that stores program for moving body
Satoshi Matsui, Kyoto (JP); and Norikazu Katsuyama, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Oct. 6, 2021, as Appl. No. 17/495,038.
Application 17/495,038 is a continuation of application No. PCT/JP2020/015849, filed on Apr. 8, 2020.
Claims priority of application No. 2019-075555 (JP), filed on Apr. 11, 2019; and application No. 2019-097881 (JP), filed on May 24, 2019.
Prior Publication US 2022/0028307 A1, Jan. 27, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G09G 3/00 (2006.01); B60K 35/00 (2024.01); B60K 35/10 (2024.01); B60K 35/23 (2024.01)
CPC G09G 3/002 (2013.01) [B60K 35/00 (2013.01); B60K 35/10 (2024.01); B60K 35/23 (2024.01); G09G 2340/0464 (2013.01); G09G 2380/10 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A display system comprising:
a display processing device that controls display of an image based on a reference position and a correction amount;
a gyro sensor that detects an angular velocity in a rotation direction about a left-right direction with respect to a traveling direction of a moving body;
a displacement amount calculator that calculates a posture change amount as an angle amount based on the angular velocity detected by the gyro sensor;
a correction processing device including a correction amount calculator that calculates a correction amount of a display position of the image based on the posture change amount; and
a gradient change detector that detects a change in a gradient of a traveling path based on a variation amount in predetermined unit time of the posture change amount, wherein
the gradient change detector detects that the moving body is undergoing a posture change due to a gradient change of the traveling path by detecting that an absolute value of the variation amount is larger than a predetermined first threshold value,
the gradient change detector detects that a posture change due to a gradient change of the traveling path is completed by detecting that an absolute value of the variation amount is equal to or less than a predetermined second threshold value during the posture change due to the gradient change of the traveling path,
the correction processing device reduces the correction amount based on a result of the gradient change detector detecting that the moving body is undergoing a posture change due to a gradient change of the traveling path,
the second threshold value is smaller than the first threshold value.