Adaptive HUD Screen Angle for Windshield Reflection Control
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Solution Overview
Problem
Existing head-up displays struggle to accommodate varying windshield angles, leading to inefficiencies in component sharing and increased susceptibility to back reflection from sunlight.
Innovation Solution
A head-up display design that includes a housing with a screen featuring a Fresnel pattern, an illumination optical module, and a projection optical module, which adjusts the screen angle and orientation based on windshield curvature and driver eye height, using a tilter and control unit to optimize image projection and minimize back reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the head-up display uses a fixed screen angle design, then the structure is simple and easy to manufacture, but it cannot adapt to different windshield angles and causes increased back reflection
Solution Approach 1:
The patent implements a movable screen angle adjustment mechanism that allows the screen to dynamically change its inclination angle according to different windshield angles. The screen is mounted on a support structure that enables angular adjustment, transforming a static fixed-angle design into a dynamic adaptive system that can accommodate various windshield configurations while minimizing back reflection.
Solution Approach 2:
The patent changes the angular parameter of the screen relative to the windshield. By adjusting the screen's inclination angle as a variable parameter rather than a fixed value, the system adapts to different windshield angles. This parameter change allows the optical path to remain optimal across various windshield configurations, reducing back reflection without requiring complete redesign for each angle.
2Adaptability or versatility
If the head-up display is designed for a specific windshield angle, then the optical performance is optimized for that angle, but it cannot be shared across different vehicle types
Solution Approach 1:
The patent designs the head-up display with a universal adjustment capability that allows the same optical components to be used across different vehicle types. The screen and support structure are configured to accommodate various windshield angles, enabling one set of components to serve multiple functions and applications rather than requiring angle-specific designs for each vehicle type.
Solution Approach 2:
By making the screen angle adjustable rather than fixed, the system maintains optical alignment precision across different vehicle types. The dynamic adjustment capability allows the same components to be precisely aligned for each specific installation, ensuring manufacturing precision is maintained while achieving universality and component sharing.
3Object-affected harmful factors
If the screen angle is adjusted to match the windshield angle, then back reflection is reduced, but the device complexity increases
Solution Approach 1:
The patent implements a dynamic screen angle adjustment mechanism that allows the screen to be inclined at different angles matching the windshield angle. This dynamic adjustment reduces back reflection by optimizing the optical path for each specific windshield configuration, minimizing the harmful reflective effect while accepting the necessary increase in mechanical complexity.
Solution Approach 2:
The patent changes the angular parameter of the screen to match the windshield angle, thereby reducing back reflection. By making this parameter adjustable rather than fixed, the system can optimize the optical configuration for each installation, reducing the harmful reflective effect while managing the complexity through parameter variation rather than structural redesign.
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
Enables the head-up display to be adaptable to different vehicle types with varying windshield angles, sharing key components and reducing back reflection from sunlight, thereby enhancing versatility and performance.
Implementation Method 1
a screen disposed in the housing, in which a Fresnel pattern is formed
Data Source
AI summary
A head-up display includes a housing; a screen disposed in the housing, the screen including a Fresnel pattern and facing a windshield; an illumination optical module configured to generate and irradiate light; an image generator configured to receive the light irradiated from the illumination optical module and generate image light; and a projection optical module configured to project the image light generated from the image generator onto the screen, wherein an upper surface of the screen faces a rearward upper direction away from the windshield or a forward upper direction toward the windshield according to an angle of the windshield with respect to a horizontal plane, and wherein a curvature of the Fresnel pattern of the screen is directly proportional to the angle of the windshield.