Heads-Up Display Ghost Image Mitigation Through Optical Parameter Tuning
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Solution Overview
Problem
Existing heads-up display systems suffer from ghost images due to content reflection from multiple surfaces of a transparent object, causing distraction and reducing the effectiveness of information presentation.
Innovation Solution
Implementing techniques to reduce the perceivability of ghost images by adjusting parameters such as virtual image distance, refractive index, and incidence angles, and applying visual characteristics like gradation, thickness, and border modifications to display elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a wedge-shaped interlayer is introduced between layers of the transparent object to alter reflection angles, then the ghost image becomes less perceivable, but the manufacturing cost increases and customization is required for each vehicle model
Solution Approach 1:
The patent applies parameter changes by modifying the refractive index of the transparent object (e.g., windshield glass) to control the reflection angles and reduce ghost image perceivability. Instead of changing the physical structure (wedge-shaped interlayer), the invention changes the optical parameter (refractive index) of the existing transparent object to achieve the desired effect of minimizing ghost images while maintaining standard manufacturing processes.
2Object-affected harmful factors
If a wedge-shaped interlayer is introduced to reduce ghost image perceivability, then the ghost image is less perceivable, but the device complexity increases due to customization requirements
Solution Approach 1:
The invention changes the refractive index parameter of the transparent object to control reflection characteristics and reduce ghost images. This approach avoids the need for complex wedge-shaped interlayer structures and their associated customization requirements for different vehicle models, thereby reducing device complexity while maintaining effectiveness.
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
Enhances the clarity of content presentation by minimizing the visibility of ghost images without the need for expensive wedge-shaped interlayers, thus reducing manufacturing and implementation complexity.
Implementation Method 1
content is typically projected onto a transparent object (e.g., a windshield of the vehicle, a transparent display positioned between the occupant and the windshield), and the content reflects from the transparent object toward the occupant
Implementation Method 2
The wedge-shaped piece of material alters the angles at which the intended virtual image and the ghost image arrive at the eye of the occupant
Data Source
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AI summary
Embodiments of the present disclosure set forth techniques for mitigating ghost images in a heads-up display. A computer-implemented method includes generating content for display on a heads-up display system, inserting into the content a version of a display element, wherein the version of the display element comprises one or more visual characteristics configured to reduce a perceivability of a ghost image of the display element, and causing the content, including the version of the display element, to be displayed by the heads-up display system.