Wedge-Shaped Windshield for HUD Double-Image Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Windshields with head-up display (HUD) devices that switch display regions vertically face challenges in manufacturing due to the need for varying wedge angles to suppress double images, as the optimum wedge angle changes with the movement of the display region, making it difficult to produce a windshield that effectively prevents double images across all display areas.
Innovation Solution
A windshield design with a glass plate configuration featuring a wedge shape, where the upper end is thicker than the lower end, and specific wedge angle ranges in different regions to accommodate the HUD's vertical display switching, ensuring the windshield can be easily manufactured while suppressing double images across all display regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the wedge angle is adjusted to suppress double images in each display region, then image quality is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by creating different wedge angle regions within the same windshield glass plate. Specifically, the windshield is divided into a first region with a first wedge angle and a second region with a second wedge angle that is smaller than the first. This allows each region to be optimized for its specific display region, suppressing double images locally while maintaining overall manufacturing feasibility through a single glass plate structure.
2Area of stationary object
If the display region is enlarged, then HUD functionality is improved, but double image suppression becomes difficult
Solution Approach 1:
The patent segments the windshield into multiple regions with different wedge angles. The first region corresponds to a first display region and has a first wedge angle, while the second region corresponds to a second display region and has a second wedge angle. This segmentation allows the enlarged display region to be divided into zones, each optimized for double image suppression in its respective area.
3Ease of manufacture
If a single wedge angle is used for the entire windshield, then manufacturing is simplified, but double image suppression fails in multiple display regions
Solution Approach 1:
The patent implements local quality by assigning different wedge angles to different regions of the windshield. The first region has a first wedge angle optimized for the first display region, and the second region has a second wedge angle optimized for the second display region. This regional optimization maintains manufacturing feasibility while ensuring reliable double image suppression across multiple display regions.
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 design effectively suppresses double images in all display regions of the HUD device, even when the display region moves vertically, by controlling the wedge angle ranges in different sections of the windshield, making it easier to manufacture and maintain image quality.
Implementation Method 1
a windshield in which a head-up display (HUD) device is used is formed in a wedge shape in order to prevent a double image
Data Source
AI summary
A windshield according to the present invention is provided with an HUD device capable of vertically switching a plurality of display regions, said windshield comprising a glass plate which has a first main surface and a second main surface opposite from the first main surface and in which the display regions are formed, wherein: the glass plate is configured such that the upper end portion is formed so as to have a greater thickness than the lower end portion, and thereby the first main surface and the second main surface form a wedge angle α; andS_Center<S_Upper and S_Center<S_Lower are satisfied.