Head-Up Display Route Guidance With Adaptive Perspective Scaling

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Solution Overview

Problem

Existing head-up display devices limit the faraway display area in route guidance images, compromising convenience by continuously narrowing the left-right width, which affects the sense of perspective and user experience.

Innovation Solution

The display control device adjusts the width and ratio of nearby and faraway regions in route guidance images, increasing the nearby width and decreasing the faraway width to enhance perspective, while also expanding the faraway display area as the image scale increases, and adjusts the virtual depression angle to align with the driver's viewpoint.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If the width of the faraway region is continuously narrowed to emphasize perspective, then the sense of perspective is enhanced, but the faraway display area becomes limited and convenience deteriorates

Engineering Contradiction:

Improvesense of perspectiveVSAvoidfaraway display area

Core Design Contradiction:

ShapeVSArea of stationary object

Solution Approach 1:

The patent applies dynamics by making the width ratio between faraway and nearby regions variable rather than fixed. As the map scale increases, the ratio of faraway width to nearby width also increases, allowing the display area to adapt dynamically to different viewing conditions while maintaining perspective emphasis.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the geometric parameters of the display region by adjusting both the absolute widths and their ratio based on map scale. This parameter change ensures that the faraway display area is preserved at larger scales while maintaining perspective at smaller scales.

Inventive Principle:

Principle #35Parameter changes

2Loss of information

If the scale of the route guidance image is increased to show more details, then information completeness is improved, but the perspective effect may be weakened without proper adjustment

Engineering Contradiction:

Improveroute guidance information completenessVSAvoidperspective effect

Core Design Contradiction:

Loss of informationVSShape

Solution Approach 1:

The patent dynamically adjusts the width ratio parameter in response to scale changes. When scale increases, the ratio of faraway width to nearby width increases accordingly, ensuring perspective is maintained even as more information is displayed at larger scales.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent simultaneously changes multiple parameters (scale and width ratio) in a coordinated manner. This allows the system to display more complete route guidance information while preserving the perspective effect through proportional adjustment of regional widths.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12571652B2Display control device, head-up display device, and display control method

Publication Date: 2026.03.10 NIPPON SEIKI CO LTD

AI summary

The present invention presents highly useful information while emphasizing the sense of perspective of a route guidance image. According to the present invention, a processor displays a route guidance image 200 on a head-up display device 20 such that the width Wn of a nearby region of the route guidance image 200 in the left-right direction is longer than the width Wf of a faraway region in the left-right direction. When increasing the scale of the route guidance image 200, the processor increases the ratio (Wf/Wn) of the faraway width Wf to the nearby width Wn.