HUD Cover Elliptical Reflecting Surface Enlarges Viewing Region
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Solution Overview
Problem
Head-up displays (HUDs) for vehicles face limitations in enlarging the viewing region due to restricted mounting space and interference with peripheral components, making it challenging to increase the size of the housing and opening while maintaining effective reflection of external light and preventing foreign materials from entering.
Innovation Solution
A cover with an elliptical reflecting curved surface is integrated into the HUD housing, allowing external light to be reflected and condensed at a focus below the driver's eye level, thereby optimizing the viewing region without obstructing the visual field and preventing dust entry through a larger opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the size of the opening is increased to enlarge the viewing region, then the viewing region is enlarged, but the mounting space is exceeded and interference with peripheral components occurs
Solution Approach 1:
The cover panel incorporates an elliptical reflecting curved surface instead of a flat surface. This curvature enables the opening size to be increased while controlling the reflection path of external light through the elliptical geometric properties, resolving the conflict between opening size and mounting space constraints
Solution Approach 2:
The patent changes the geometric parameters of the cover panel by introducing an elliptical shape with specific focal points. The first focus is positioned at the edge of the cover member and the second focus above it, creating controlled light reflection paths that allow larger opening sizes without interfering with peripheral components
2Area of stationary object
If the opening size is increased to improve viewing region, then the viewing region is enlarged, but external light reflection obstructs the driver's visual field
Solution Approach 1:
The elliptical reflecting curved surface on the cover panel directs external incident light to reflect at specific angles determined by the elliptical geometry. The curvature ensures that reflected light is directed away from the driver's visual field while still allowing a larger opening for improved viewing region
Solution Approach 2:
The cover panel has different functional zones: the elliptical reflecting curved surface area handles external light reflection, while other areas allow image light transmission. This local differentiation enables the opening to be larger without causing visual field obstruction from reflected light
3Area of stationary object
If the opening size is increased to enlarge viewing region, then the viewing region is enlarged, but foreign materials can enter the housing more easily
Solution Approach 1:
The cover panel serves multiple functions simultaneously: it allows image light to pass through to the driver, reflects external incident light away from the visual field, and prevents foreign materials from entering the housing. This multi-functionality enables a larger opening without compromising protection against foreign materials
Solution Approach 2:
The cover panel acts as a protective barrier that can be shaped into an elliptical reflecting curved surface. This thin film structure allows light transmission and reflection while maintaining a physical barrier against foreign materials, enabling larger opening sizes with continued protection
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 elliptical reflecting surface enhances the viewing region for drivers by allowing a larger opening size within the HUD housing, effectively reflecting external light without obstructing the driver's view and preventing foreign materials from entering the housing.
Implementation Method 1
a cover panel coupled with a lower portion of the cover member and having an elliptical reflecting curved surface that reflects external incident light
Implementation Method 2
a first focus F1 may be formed at one edge of the cover member; and the elliptical reflecting curved surface may be formed based on the first focus
Data Source
AI summary
A cover of a head up display and a housing including the head up display cover are provided. The cover of a head up display includes a cover member and a cover panel that is coupled with a lower portion of the cover member and has an elliptical reflecting curved surface that reflects external incident light. The cover and the housing allow the viewing region of a driver to be enlarged while satisfying reflection conditions which reflect external incident light under the elliptical cross-section of a driver's eye.