HUD Display Thermal Path for Compact Backlight Heat Dissipation
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Solution Overview
Problem
Existing head-up displays (HUDs) face challenges in improving the heat resistance of liquid crystal panels and securing effective heat dissipation of backlights while maintaining a compact size, as they are often limited by the space available in vehicle dashboards.
Innovation Solution
The proposed HUD design includes a heat sink that dissipates heat generated from the backlight, with at least a portion of the heat sink exposed outside the housing. The design also features a liquid crystal panel with a plate having a thermal conductivity higher than air, and an emission surface exhaust heat path that connects the panel's periphery to the heat sink, enhancing thermal conductivity and gradient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat sink is added to dissipate heat from the backlight, then heat dissipation performance is improved, but device size increases
Solution Approach 1:
The patent combines the heat sink with the existing housing structure of the HUD. The heat sink is integrated into the housing rather than being a separate component, allowing heat dissipation functionality to be merged with the structural enclosure. This reduces the overall device volume increase while maintaining effective heat dissipation from the backlight.
Solution Approach 2:
The housing structure serves dual purposes: it provides mechanical protection and enclosure for the HUD components, and simultaneously functions as a heat sink for dissipating heat from the backlight. By making the housing multi-functional, the patent avoids adding dedicated heat dissipation components that would increase device size.
2Ease of operation
If the HUD is downsized to fit narrow dashboard space, then ease of installation is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The patent extends the heat sink structure outward from the housing in a direction perpendicular to the main device body. This dimensional extension allows the heat dissipation surface to be positioned away from the compact HUD body, enabling effective heat dissipation without increasing the footprint area that would affect dashboard installation space.
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 design effectively improves the heat resistance of the liquid crystal panel and secures efficient heat dissipation of the backlight, while maintaining a compact HUD size, thereby reducing the risk of temperature-related failures and degradation.
Implementation Method 1
a heat sink that dissipates heat generated from the backlight
Implementation Method 2
at least a portion of the heat sink exposed to an outside of the housing
Implementation Method 3
the plate being formed of a material having a thermal conductivity higher than that of air and provided with an emission surface exhaust heat path
Implementation Method 4
have a thermal gradient greater than that of a heat transfer path for transferring the heat from the emission surface to the heat sink by using air as a medium
Data Source
AI summary
A display device includes a backlight, a display element, a plate for holding at least a portion of an emission surface, from which an image light is emitted, provided on the display element, and a heat dissipation portion that dissipates heat generated from the display element. The display element is connected to the heat dissipation portion via the plate.