HUD Cold Mirror Light Path for High-Intensity Collision Warnings
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Solution Overview
Problem
Conventional head-up displays (HUDs) in vehicles are unable to produce high-intensity light due to losses at the windshield and mirrors, limiting their effectiveness in providing clear safety warnings for impending collisions.
Innovation Solution
A head-up display (HUD) device comprising a plurality of light-emitting diodes (LEDs) configured to emit light beams, with a cold mirror and concave mirror setup that allows light to pass through and be reflected towards the windshield, enhancing the visibility of safety warnings by generating high-intensity light for collision alerts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional HUD devices use traditional mirror and display components, then the device structure is simple, but the light intensity is insufficient due to losses at the windshield and mirrors
Solution Approach 1:
The system divides the light path into multiple segments, each handled by a specialized component: LEDs generate light, the first mirror (with transparent and diffusive portions) directs and scatters light, and the second mirror reflects light toward the windshield. This segmentation allows optimization of each component for its specific function, achieving high light intensity while managing complexity through modular design
Solution Approach 2:
The first mirror acts as an intermediary element between the LED light source and the second mirror. Its transparent portion allows light transmission while its diffusive portion scatters light to achieve uniform distribution. This intermediary component resolves the contradiction by enabling light intensity enhancement without requiring direct contact between the light source and the windshield, thus managing system complexity
2Reliability
If the HUD device uses multiple mirrors and a cold mirror to enhance light intensity, then the safety warning visibility is improved, but the device complexity increases
Solution Approach 1:
The first mirror is designed with different local properties: a transparent portion for light transmission and a diffusive portion for light scattering. This local differentiation allows the single component to perform multiple functions (directional control and uniform distribution), enhancing safety warning visibility while avoiding the need for additional components, thus managing device complexity
Solution Approach 2:
The second mirror is configured as a concave mirror with a specific curved surface. This curvature focuses and directs light beams toward the windshield, ensuring that the safety warning is clearly visible to the operator. The curved geometry optimizes light distribution and image quality, improving reliability while the precise curvature design allows a single component to handle complex optical requirements
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 solution enables the HUD device to effectively project high-intensity light warnings onto the windshield, ensuring operators are adequately notified of impending collisions, thereby facilitating timely corrective actions.
Implementation Method 1
a first mirror that includes a transparent portion on a first side of the first mirror and a diffusive portion on a second side of the first mirror, wherein the light beams are configured to pass through the first mirror
Implementation Method 2
a first mirror that includes a transparent portion on a first side of the first mirror and a diffusive portion on a second side of the first mirror
Implementation Method 3
a second mirror that is configured to reflect the light beams toward a first reflective surface, wherein the second mirror is configured to reflect the light beams subsequent to the light beams passing through the first mirror
Data Source
AI summary
A head-up-display (HUD) device is disclosed and includes a plurality of light-emitting diodes (LEDs) configured to emit light beams in response to a control module of a vehicle generating a safety warning. The control module includes a processor that is configured to execute instructions stored in a nontransitory computer-readable memory. The HUD device also includes a first mirror that includes a transparent portion on a first side of the first mirror and a diffusive portion on a second side of the first mirror, and the light beams are configured to pass through the first mirror. The HUD device also comprises a second mirror that is configured to reflect the light beams toward a first reflective surface, and the second mirror is configured to reflect the light beams subsequent to the light beams passing through the first mirror.