Head-Up Display Lighting Units with Segmented Thermal Management
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Solution Overview
Problem
Conventional head-up displays face thermal damage issues due to high directivity LEDs generating excessive heat, which increases lighting intensity and heat within the cylindrical casing, potentially damaging the LCD panel.
Innovation Solution
The design separates the first and second lighting units, with the first unit using low directivity LEDs and a heat sink to manage heat, and the second unit having higher thermal resistance to operate in higher temperatures, installed independently on a package under the windshield, reducing thermal impact on the first unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the second LED group with high directivity is installed inside the cylindrical casing, then the lighting intensity increases, but the heat generated causes thermal damage to the LCD panel
Solution Approach 1:
The patent divides the lighting system into two separate units: a first lighting unit with low directivity LEDs for general illumination and a second lighting unit with high directivity LEDs for focused high-intensity lighting. This segmentation allows each unit to be optimized independently, with the second unit's heat being managed separately through its own thermal resistance design, preventing thermal damage to the LCD panel while maintaining high lighting intensity where needed.
Solution Approach 2:
The patent applies local quality by giving different thermal resistance characteristics to different lighting units. The second lighting unit, which generates more heat due to high directivity LEDs, is designed with higher thermal resistance to contain and manage its heat locally. This prevents the heat from affecting the LCD panel while allowing the first lighting unit to operate with lower thermal resistance for efficient heat dissipation.
2Device complexity
If the first and second lighting units are integrated in one cylindrical casing, then the device structure is compact, but the heat from the second LED group cannot be effectively managed
Solution Approach 1:
The patent segments the lighting units into separate modular assemblies that can be independently designed and managed. The first lighting unit and second lighting unit are housed in separate cylindrical casings, allowing independent thermal management strategies for each unit while maintaining a relatively compact overall structure when installed together in the vehicle dashboard.
Solution Approach 2:
The patent introduces a package structure that acts as an intermediary mounting platform. Both lighting units are installed on this common package, which provides a standardized interface for mounting while allowing the units to be thermally isolated from each other and from heat-sensitive components like the LCD panel.
3Illumination intensity
If the second LED group with high directivity is used, then the lighting intensity increases, but the heat generated increases correspondingly
Solution Approach 1:
The patent applies local quality by assigning different thermal resistance characteristics to different lighting units based on their heat generation profiles. The second lighting unit, which uses high directivity LEDs for high intensity illumination, is designed with higher thermal resistance to contain and manage its heat locally. This prevents the heat from affecting surrounding components while maintaining the high lighting intensity performance.
Solution Approach 2:
The patent converts the harmful heat generated by high directivity LEDs into a manageable characteristic by designing the second lighting unit with higher thermal resistance. This thermal resistance contains the heat within the second unit's casing, preventing it from affecting the LCD panel or other sensitive components. The heat is effectively converted from a harmful external factor into a contained internal characteristic that can be managed through appropriate thermal design.
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 configuration reduces the risk of thermal damage to the first lighting unit, allows for reduced package size, and effectively displays both low and high priority information with controlled lighting intensity, enhancing the reliability and efficiency of the head-up display system.
Implementation Method 1
a first lighting source that emits light for the windshield as the first information
Implementation Method 2
a second lighting source that emits light for the windshield as the second information
Implementation Method 3
a heat sink that manages heat from the first lighting source
Implementation Method 4
the second unit having higher thermal resistance to operate in higher temperatures
Data Source
AI summary
The present disclosure provides a head-up display that has a first lighting unit to display first information on a windshield. The first lighting unit includes a first lighting source that emits light for the windshield as the first information and a first cylindrical casing that accommodates the first lighting source therein. The head-up display further has a second lighting unit to display second information on the windshield. The second lighting unit includes a second lighting source that emits light for the windshield as the second information. The head-up display further has a package disposed under the windshield. The first and second lighting units are installed on the package. The second lighting unit is installed on the package independently from the first lighting unit.