Head-Up Display Reflector Mounting and Mirror Cooling Layout
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Solution Overview
Problem
Existing head-up displays face challenges in reducing manufacturing costs, enlarging display range, preventing external light interference, improving moldability of concave mirrors, and optimizing the mounting structure of reflection units.
Innovation Solution
A picture generation apparatus with a light source substrate, optical member, display device, and heat sink, where the substrate is positioned between engagement portions of a holder and heat sink, and a reflector with a rotatable design and specific end surface angles to prevent distortion during molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a concave mirror substrate is molded from resin using a conventional mold, then the substrate can be manufactured, but corner portions are cooled and solidified more easily causing distortion that distorts characters at the outer peripheral portion of the video
Solution Approach 1:
The mold is divided into multiple cooling channels with different cooling rates for different regions. Specifically, the corner portions have separate cooling channels that provide slower cooling compared to the central portions, segmenting the cooling process to prevent uniform distortion across the substrate
Solution Approach 2:
Different regions of the substrate are given different cooling characteristics. The corner portions are designed to cool more slowly than the central portions by adjusting cooling channel proximity and configuration, creating local quality differences in thermal treatment that prevent corner distortion while maintaining overall manufacturing efficiency
2Area of stationary object
If the display range of the picture generation apparatus is enlarged, then more information can be displayed, but the apparatus becomes more complex and costly to manufacture
Solution Approach 1:
The reflection unit combines multiple optical functions into a single integrated component. By merging the reflective surface, optical path control, and image projection functions into one unit, the system achieves enlarged display range without proportionally increasing device complexity
Solution Approach 2:
The system utilizes angular/directional dimensions by rotating the reflection unit to project images at different angles and positions. This allows the display range to be expanded in spatial dimensions without adding more physical display surfaces or complex multi-component systems
3Ease of operation
If external light enters the picture generation apparatus, then the apparatus can operate, but reflected light adversely affects generation of the picture
Solution Approach 1:
The reflection unit is designed to manage and redirect external light rather than simply blocking it. By converting potentially harmful reflected light into controlled optical paths, the system maintains operation capability while eliminating adverse effects on picture generation
Solution Approach 2:
Optical members within the picture generation apparatus act as intermediaries between external light sources and the picture generation process. These intermediaries control, filter, or redirect light paths to prevent direct interference with picture generation while maintaining necessary illumination
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 reduces manufacturing costs, enlarges display range, prevents external light interference, improves moldability, and simplifies the mounting of reflection units, resulting in a cost-effective and efficient head-up display system.
Implementation Method 1
a light source substrate on which a light source is mounted; an optical member through which light emitted from the light source is transmitted
Implementation Method 2
a heat sink configured to dissipate heat generated from the light source substrate
Implementation Method 3
light emitted from a picture generation apparatus is reflected by a reflector and is emitted to a windshield of a vehicle or a combiner
Data Source
AI summary
A picture generation apparatus includes: a light source substrate on which a light source is mounted; an optical member through which light emitted from the light source is transmitted; a display device configured to form, by the light transmitted through the optical member, light for generating a predetermined picture; a heat sink configured to dissipate heat generated from the light source substrate; and a lens holder configured to hold the optical member. The lens holder includes first engagement portions, and the heat sink includes second engagement portions. Each of the first engagement portions and a respective one of the second engagement portions are fixed to each other, so that the light source substrate is positioned and fixed in a state of being interposed between the lens holder and the heat sink.