Head-Up Display Assembly With Diffuser for Solar Heat Protection
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Solution Overview
Problem
Existing head up displays in vehicles face challenges in managing high temperatures at the focal point due to concentrated solar radiation, which can damage sensitive electronics and require large packaging volumes.
Innovation Solution
Incorporating a diffuser between the optical system and the transmissive display to diffuse solar radiation, reducing heat intensity on the transmissive display by spreading it over a larger area, and positioning the focal point closer to the diffuser to withstand higher temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If solar radiation is concentrated at the focal point in the transmissive display, then the optical system achieves high illumination intensity, but the temperature becomes excessively high causing damage to sensitive electronics
Solution Approach 1:
A diffuser is introduced as an intermediary component between the optical system and the transmissive display. The diffuser receives concentrated solar radiation and redistributes it, preventing direct concentration of heat on the transmissive display while maintaining adequate illumination intensity for display functionality.
Solution Approach 2:
The patent converts the harmful concentrated solar radiation into a beneficial distributed light pattern. By using the diffuser to scatter the concentrated light, the system transforms the harmful thermal concentration into a useful distributed illumination that protects sensitive electronics while maintaining display visibility.
2Manufacturing precision
If the focal point is positioned closer to the transmissive display, then the optical system achieves better image focus, but the heat exposure on the transmissive display increases
Solution Approach 1:
The diffuser serves as a protective intermediary that allows the focal point to be positioned closer to the transmissive display for better focus while preventing direct heat transfer. The diffuser absorbs and redistributes the concentrated energy, decoupling the optical focusing function from the thermal loading on the display.
3Reliability
If the head up display is designed to withstand high temperatures, then the system can handle concentrated solar radiation, but the packaging volume increases
Solution Approach 1:
Instead of designing for high temperature tolerance, the system converts the harmful thermal concentration into a beneficial distributed light pattern using the diffuser. This approach maintains compact packaging while protecting sensitive electronics from excessive heat by redistributing the solar radiation before it reaches temperature-sensitive components.
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
Reduces heat exposure on the transmissive display, allowing for compact packaging and improved performance by maintaining the focal point closer to the diffuser, thus enhancing the durability and efficiency of the head up display.
Implementation Method 1
A diffuser is located between the optical system and the transmissive display
Implementation Method 2
diffuse solar radiation, reducing heat intensity on the transmissive display by spreading it over a larger area
Implementation Method 3
positioning the focal point closer to the diffuser
Data Source
Figure 1~2
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Figure 5~6
AI summary
A head up display assembly includes an optical system (52) and a transmissive display. A light source is configured to projected a light through the transmissive display. A diffuser (64) is located between the optical system and the transmissive display (62).