Vehicle Head-Up Display Using Optical Multiplication for Image Generation
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Solution Overview
Problem
Existing head-up displays for vehicles generate two separate images for each eye of the driver, which can cause irritation if not accurately aligned, and require high-resolution display panels that are expensive and not suitable for mass production.
Innovation Solution
The image generator calculates and multiplies primary elementary images into multiple elementary images, using an optical multiplier and position detector to adjust the image presentation based on the viewer's position, reducing the required resolution of the display panel and improving image accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a highly resolving display panel is used to generate multiple elementary images for each microlens, then the image resolution and quality are improved, but the manufacturing cost increases significantly
Solution Approach 1:
The display panel is divided into multiple independently controllable image points (pixels), where each image point can be selectively activated to form different elementary images. This segmentation allows the system to generate multiple high-resolution elementary images using a lower-resolution display panel, as each elementary image uses only a subset of the total image points.
Solution Approach 2:
Multiple elementary images are nested within the capacity of a single display panel by reusing the same physical image points across different time slots or patterns. The display panel serves as a container that can hold and present multiple different image configurations sequentially, effectively nesting multiple high-resolution images within a lower-resolution physical substrate.
2Adaptability or versatility
If two separate images are generated for each eye of the viewer, then stereoscopic vision is improved, but the complexity of image assignment and alignment increases
Solution Approach 1:
The system uses periodic alternation between left-eye and right-eye images, presenting different elementary images to each eye in rapid succession. This temporal multiplexing approach simplifies the system architecture compared to simultaneous dual-image generation, as it uses the same physical image points for both eyes at different time intervals, reducing hardware complexity while maintaining stereoscopic functionality.
Solution Approach 2:
The system generates copies of elementary images for different eyes rather than requiring completely separate image generation pathways. The same display panel and microlens array are used to create multiple copies of images tailored for left and right eyes, simplifying the overall system while achieving stereoscopic效果.
3Quantity of substance
If the number of image points on the display panel is reduced, then the manufacturing cost decreases, but the resolution of the generated images deteriorates
Solution Approach 1:
The system dynamically assigns and reassigns image points on the display panel to different elementary images based on temporal patterns and viewer position. Rather than requiring static high-resolution coverage from all pixels simultaneously, the system dynamically activates only the necessary subset of image points for each elementary image, effectively achieving high resolution with fewer active pixels at any given moment.
Solution Approach 2:
The system changes the activation state and spatial distribution parameters of image points dynamically. By varying which image points are active and their assigned functions across different time slots, the system achieves high effective resolution from a lower total pixel count, as each physical pixel serves multiple functional roles across different elementary images.
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 approach achieves a high-quality image impression with a lower resolution display panel, reducing the number of image points needed and improving driving safety by minimizing viewer fatigue and distraction.
Implementation Method 1
The image generator has an optical multiplier. The optical multiplier multiplies a primary elementary image, calculated by a calculation unit, into a plurality of elementary images
Implementation Method 2
a deflector having a multiplicity of microlenses, arranged in the beam path between the display panel and the windshield and deflect light rays from different luminous points into different radiation directions
Implementation Method 3
the light rays of which are visible for an occupant of the vehicle by reflection at a windshield of the vehicle
Data Source
AI summary
A head-up display for a vehicle includes: a display panel, a deflector having a plurality of microlenses, and an image generator. The image generator is configured to generate a plurality of primary elementary images which are multiplied by an optical multiplier into elementary images, which are in turn assigned in each case to a respective one of the plurality of microlenses.