Head-Up Speed Display Layout for Small Speed Difference Visibility
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Solution Overview
Problem
Current head-up display systems in movable bodies, such as vehicles, do not effectively display speed-related information in a way that is easily recognizable to occupants, particularly when the difference between the current speed and other speed-related information is small, making it difficult for drivers to visualize this information with good visibility.
Innovation Solution
An image control apparatus and method that uses a head-up display system to project speed-related information onto a windshield, where the display mode is adjusted to highlight the difference between the current vehicle speed and reference speeds by expanding the intervals between scale marks around the current speed, and using visual cues like color or blinking to draw attention to the difference, ensuring easy recognition by the driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the head-up display shows speed-related information using a conventional scale display, then the display structure is simple, but the occupant cannot easily recognize the difference between current speed and reference speed when the difference is small
Solution Approach 1:
The display is segmented into multiple functional regions: a first region showing the current speed value, a second region showing reference speed information, and a third region showing the difference between them. This segmentation allows each region to be optimized for its specific function, improving overall recognition precision without requiring complete redesign of the entire display system
Solution Approach 2:
The patent adds a spatial dimension to speed information presentation by displaying not only the current speed value but also reference speed and difference information in distinct spatial regions. This dimensional expansion transforms a one-dimensional speed scale into a multi-regional information layout, enabling better differentiation of speed relationships
2Ease of operation
If the head-up display uses a conventional arc-shaped or trapezoidal line segment display, then the device complexity is low, but the visibility and ease of recognizing speed information is insufficient
Solution Approach 1:
Different regions of the display are assigned different visual qualities and information types: the first region displays current speed with high prominence, the second region shows reference speed with distinct visual characteristics, and the third region highlights the difference. This local differentiation of visual qualities improves recognition ease without requiring complex hardware changes
Solution Approach 2:
The patent introduces an intermediary difference display region that mediates between the current speed and reference speed information. This intermediary element helps occupants quickly understand the relationship between speeds without having to mentally calculate differences, thereby improving recognition ease
3Illumination intensity
If the head-up display shows all speed-related information in a compact format, then the area used is minimized, but the visibility and distinguishability of speed differences is reduced
Solution Approach 1:
The display area is segmented into three distinct regions that can be spatially distributed across the head-up display field. This segmentation allows each region to be adequately sized and positioned for optimal visibility, preventing information crowding while maintaining efficient use of the overall display area
Solution Approach 2:
The patent utilizes the two-dimensional space of the head-up display more effectively by arranging information in multiple spatial regions rather than compacting it into a single area. This spatial distribution maintains visibility while optimizing the use of available display real estate
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system allows drivers to easily and visibly recognize the difference between their current speed and reference speeds, enhancing safety by providing clear and timely feedback on speed-related information.
Implementation Method 1
an optical apparatus 10 that forms light images based on generated image data and projects the formed light images onto a predetermined projection area 311 of a windshield 310
Implementation Method 2
The HUD directly projects information to human vision, and provides the occupant (driver, passenger, etc.) with various kinds of information including images. In the HUD, the generated light image is diffracted in a direction toward the occupant by the windshield or a combiner, etc.
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
(Object) To provide an image control technology that enables an occupant of a moving body to recognize the difference between the present traveling speed and other speed related information, with good visibility. (Means of Achieving the object) An image control apparatus installed in a movable body, includes a controller configured to generate data of a display image in which a present moving speed of the movable body is indicated together with other speed related information, and change a display mode related to a difference between the present moving speed and a speed indicated by the other speed related information, upon detecting that a predetermined condition is satisfied.