Head-Up Display Lens Segmentation for Glare-Free Illumination
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Solution Overview
Problem
Existing head-up display illumination devices suffer from glare issues due to the interaction of light from multiple sources, which affects the clarity and effectiveness of the visual communication in automotive environments.
Innovation Solution
An image generation device is designed with a lens having distinct regions for transmitting light from different sources, along with a light shielding portion to prevent glare by blocking light from one region from entering the other, and a holder that integrates the light shielding portion between the light sources and the lens, reducing the number of parts and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple light sources are used to illuminate the display device, then the brightness and visibility of the head-up display is improved, but glare occurs due to light from one source transmitting through the wrong region of the lens
Solution Approach 1:
The lens is divided into multiple regions, with each region corresponding to a specific light source. The first region transmits light from the first light source, while the second region transmits light from the second light source. This segmentation ensures that light from each source is directed to the correct area, preventing cross-contamination and glare while maintaining high brightness and visibility of the head-up display.
Solution Approach 2:
A light shielding portion is introduced to extract and block the harmful cross-transmitted light. The light shielding portion is positioned to prevent light from the first light source from transmitting through the second region, and to prevent light from the second light source from transmitting through the first region. This extraction of harmful light paths eliminates glare while preserving the beneficial illumination paths.
2Object-affected harmful factors
If a light shielding portion is added to prevent glare, then glare is eliminated, but the device complexity and manufacturing cost increase
Solution Approach 1:
The light shielding portion is merged with the holder that supports the lens. Instead of being a separate component, the light shielding portion is integrated into the holder structure, forming a unified component. This merging reduces the total number of parts, simplifies the device structure, and lowers manufacturing cost while effectively preventing glare through the light shielding function.
3Object-affected harmful factors
If multiple separate components are used for light shielding and lens holding, then the light shielding function is effective, but the manufacturing cost and assembly complexity increase
Solution Approach 1:
The holder and light shielding portion are combined into a single integrated component. The holder is designed to simultaneously perform its supporting function and the light shielding function through the integrated light shielding portion. This reduces the number of manufacturing steps, decreases assembly complexity, and lowers overall manufacturing cost while maintaining effective glare prevention.
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 effectively prevents glare while maintaining the effective utilization of light, improving the generation precision of virtual images and reducing manufacturing costs by integrating the light shielding portion within the holder or lens.
Implementation Method 1
a lens that transmits light emitted from the first light source and the second light source; The lens is constituted by a first region that transmits first light from the first light source, and a second region that transmits second light from the second light source
Implementation Method 2
a light shielding portion is further provided to prevent the first light from transmitting through the second region and prevents the second light from transmitting through the first region
Data Source
AI summary
An image generation device for generating an image for a head-up display includes: a first light source; a second light source disposed to be spaced apart from the first light source by a certain distance; a lens that transmits light emitted from the first light source and the second light source; and a display device that forms light that generates the image from the light transmitted through the lens. The lens is constituted by a first region that transmits first light from the first light source, and a second region that transmits second light from the second light source, and a light shield is further provided to prevent the first light from transmitting through the second region and prevent the second light from transmitting through the first region.