Vehicle Display Device Monocular Viewability Control
Solution Overview
Problem
Drivers have difficulty recognizing virtual images displayed in regions viewable with only one eye, as they are less noticeable compared to those viewable with both eyes, which can hinder safe driving.
Innovation Solution
A vehicle display device that projects virtual images onto a windshield, using a controller to adjust display forms in binocular, right monocular, and left monocular viewing regions based on the driver's viewpoint position and line-of-sight direction, enhancing viewability and recognizability by employing different display forms in each region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If virtual images are displayed in monocular viewing regions, then the display area is expanded, but the driver's recognition ability deteriorates
Solution Approach 1:
The patent applies different display strategies to different viewing regions: in binocular regions, normal display is used, while in monocular regions, the system employs enhanced display methods such as increasing brightness, using different colors, or adding graphical elements to compensate for the reduced recognition ability in one-eye viewing areas.
Solution Approach 2:
The system dynamically changes display parameters (brightness, color, size, position) based on the detected eye position and the determined viewing region type. When the driver's eye is positioned in a monocular region, the display parameters are adjusted to enhance visibility and recognition, thereby resolving the contradiction between expanded display area and maintained recognition ability.
2Illumination intensity
If the display brightness in monocular regions is increased, then the viewability is improved, but the energy consumption increases
Solution Approach 1:
The patent implements dynamic adjustment of display brightness based on real-time eye position detection. The system increases brightness only in the specific monocular region where the driver's eye is currently positioned, rather than uniformly increasing the entire display's brightness, thereby improving viewability while minimizing energy consumption.
Solution Approach 2:
The system applies enhanced brightness selectively to specific regions of the display corresponding to monocular viewing areas, rather than increasing the brightness of the entire display. This localized enhancement improves viewability in critical areas while maintaining lower energy consumption overall.
3Measurement precision
If multiple display forms are used for different viewing regions, then the recognizability is improved, but the device complexity increases
Solution Approach 1:
The patent segments the display area into different types of viewing regions (binocular, right monocular, left monocular) based on the driver's eye position. Each region type is assigned an appropriate display form from a predefined set, allowing the system to improve recognizability through region-specific displays while managing complexity through systematic classification.
Solution Approach 2:
The system uses a unified eye position detection mechanism and a standardized set of display forms that can be applied across different region types. This multi-functional approach allows the same detection system to serve multiple purposes (determining both eye position and viewing region type) and the same display forms to be adapted for different regions, thereby improving recognizability without proportionally increasing device complexity.
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 device ensures easier recognition of virtual images for the driver by optimizing display forms in various viewing regions, thereby improving safety during driving.
Implementation Method 1
a head-up display (HUD), which projects a display image displayed on a display device onto a windshield or the like via a reflection mirror or the like
Data Source
AI summary
In a vehicle display device, in a case of displaying an outside information virtual image in a right monocular viewing region and a left monocular viewing region, a controller performs a display image control for a display image displayed by an image projection unit by using a viewability display form with a more excellent viewability than in a case of displaying the outside information virtual image in a binocular viewing region. In a case of displaying the outside information virtual image in the binocular viewing region, the controller performs a display image control by using the identifiability display form that provides a more excellent recognizability of the outside information virtual image for the driver than in a case of displaying the outside information virtual image in the right monocular viewing region and the left monocular viewing region.