Head-Up Display Fresnel Lens Layout for Larger Screens
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Solution Overview
Problem
Conventional head-up display devices face challenges in miniaturization and increased manufacturing costs due to the need for larger aspherical mirrors to enhance screen size, making them difficult to assemble in limited vehicle spaces and increasing costs.
Innovation Solution
The use of a Fresnel lens instead of an aspherical mirror to magnify the image, combined with a configuration of light sources divided into groups with varying current supplies to optimize light distribution, allows for a compact design that increases screen size while reducing device size and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the size of the aspherical mirror is increased to enhance screen size, then the screen size increases, but the device size and manufacturing costs increase
Solution Approach 1:
The patent changes the optical parameter from using an aspherical mirror to using a Fresnel lens. This parameter change allows achieving the same screen enlargement function with a more compact device structure, resolving the contradiction between screen size and device size
Solution Approach 2:
The patent substitutes the mechanical/optical system of an aspherical mirror with a Fresnel lens system. This substitution enables the same optical function of magnifying the display image while reducing the overall device footprint and manufacturing complexity
2Area of stationary object
If the size of the aspherical mirror is increased to enhance screen size, then the screen size increases, but manufacturing costs increase
Solution Approach 1:
The patent changes the optical component parameter from an aspherical mirror to a Fresnel lens. Fresnel lenses are generally more cost-effective to manufacture, especially for large apertures, as they can be produced using molding techniques rather than complex figuring processes required for aspherical mirrors
Solution Approach 2:
The patent employs a Fresnel lens which is typically a more economical optical component compared to an aspherical mirror of equivalent size. This choice reduces manufacturing costs while maintaining the required optical performance for screen enlargement
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 enables a miniaturized head-up display device with a larger screen size, simplifying assembly and reducing production costs by eliminating the need for large aspherical mirrors and optimizing space usage.
Implementation Method 1
a Fresnel lens configured to magnify the image displayed at the display panel
Implementation Method 2
a plurality of light sources housed at the housing and configured to emit light
Data Source
AI summary
According to at least one aspect, the present disclosure provides a head-up display device comprising: a housing; a plurality of light sources housed at the housing and configured to emit light; a display panel configured to display an image based on the light emitted from the plurality of light sources; and a Fresnel lens configured to magnify the image displayed at the display panel. According to another aspect, the present disclosure provides a head-up display device configured to project an image on a windshield of a vehicle, comprising: a housing; a plurality of light sources housed at the housing and configured to emit light; and a display panel configured to display an image based on the light emitted from the plurality of light sources, wherein the plurality of light sources are divided into a plurality of groups, each group being supplied with a current having a mutually different magnitude.