Head-Up Display Reflector for Vehicle Windshield Adaptation
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Solution Overview
Problem
The existing head-up display devices require different housings for various types of vehicles due to varying windshield inclinations, leading to increased costs and complexity in adjusting the flat mirror or indicator positions to correct virtual image displacement.
Innovation Solution
The implementation of a head-up display device with a reflector featuring a linear Fresnel lens or non-regular-reflection type holographic mirror, allowing for easy adjustment of the reflecting surfaces to match the windshield inclination, eliminating the need for multiple housings and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a flat mirror is used to reflect display light, then the housing can be downsized, but the device requires different housings for various vehicle types due to varying windshield inclinations
Solution Approach 1:
The patent applies parameter changes by using a Fresnel reflector with adjustable inclination angles instead of a fixed flat mirror. The reflector can be tilted at different angles to match various windshield inclinations across different vehicle types, allowing a single housing design to accommodate multiple vehicles while maintaining compact size.
Solution Approach 2:
The patent implements dynamics by making the reflector adjustable rather than fixed. The reflector can be dynamically repositioned or reoriented to change its reflection angle, enabling the same device to adapt to different windshield angles without requiring multiple static housing configurations.
2Manufacturing precision
If the angle of the flat mirror is changed to correct virtual image displacement, then the position accuracy is improved, but the structure and shape of the attaching part must be changed requiring different housings
Solution Approach 1:
The patent applies universality by designing a single housing structure that can accommodate multiple reflector configurations. The standardized housing includes a reflector mounting mechanism that allows the same housing to be used across different vehicle types, eliminating the need for vehicle-specific housing variants while maintaining precise virtual image positioning.
Solution Approach 2:
The patent uses dynamics by implementing an adjustable reflector mounting system within the housing. This allows the reflector angle to be changed to correct virtual image displacement for different windshields, while the housing structure itself remains standardized and reusable across vehicle types.
3Manufacturing precision
If the position of the indicator is changed to correct virtual image displacement, then the position accuracy is improved, but different housings must be prepared for various vehicle types
Solution Approach 1:
The patent applies parameter changes by using an adjustable reflector instead of a fixed indicator position. By changing the reflector's inclination angle, the virtual image position can be precisely adjusted for different vehicle types without requiring physical repositioning of the indicator or different housing structures.
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
This solution enables the head-up display device to be adapted to various vehicles without increasing costs, ensuring accurate virtual image projection without the need for frequent adjustments or new housings, while preventing flare issues through optimized light reflection.
Implementation Method 1
a reflector which is provided in the housing, and includes a plurality of reflecting surfaces which are arranged in parallel with each other and inclined at the same angle so that a display light which is irradiated from the indicator is reflected by the reflecting surfaces
Implementation Method 2
the reflector includes a linear Fresnel lens in which a plurality of slopes which are arranged in parallel with each other and inclined at the same angle are formed
Implementation Method 3
the slopes become the reflecting surfaces by being mirrored
Data Source
AI summary
A head-up display device which can be applied to various types of vehicles is provided without causing cost increase. A head-up display device which makes a virtual image to be formed by projecting display light on a windshield of a vehicle includes a housing, an indicator which is provided in the housing, and a reflector which is provided in the housing, and includes a plurality of reflecting surfaces which are arranged in parallel with each other and inclined at the same angle so that the display light which is irradiated from the indicator is reflected by the reflecting surfaces.