LCD Heat Release Structure for HUD Thermal Management
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Solution Overview
Problem
Head-up displays (HUDs) using liquid crystal displays (LCDs) face heat management issues due to concentrated external light, which can increase the temperature of the LCD, potentially leading to reduced performance and safety concerns.
Innovation Solution
Incorporating a heat release structure, such as a heat-releasing fin, fan, or heat pipe, connected to a heat release structure formed from materials like copper, indium tin oxide, or graphene, to efficiently dissipate thermal energy from the LCD, while maintaining transmittance and avoiding the trade-off between thermal conductivity and transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a lens is used to adjust the output image in the HUD, then the image quality and viewing direction control are improved, but external light is concentrated on the LCD causing heat accumulation and temperature increase
Solution Approach 1:
The patent extracts the heat management function from the LCD structure by introducing a separate heat release structure. This heat release structure is positioned between the LCD and the external environment to extract accumulated heat without interfering with the LCD's light transmission function, thereby resolving the contradiction between maintaining image brightness and controlling temperature.
Solution Approach 2:
The heat release structure acts as an intermediary element between the LCD and the external environment. It mediates the heat transfer process by providing a dedicated thermal conduction path that does not obstruct optical paths, allowing heat to be dissipated while maintaining the LCD's light transmission performance.
2Temperature
If traditional heat dissipation methods are used, then thermal energy can be released, but transmittance of the display is degraded
Solution Approach 1:
The patent segments the heat dissipation function from the light transmission function by introducing a separate heat release structure with lattice-shaped transparent portions. This segmentation allows the heat release structure to perform thermal management while the transparent portions maintain light transmission, eliminating the trade-off between heat dissipation and transmittance.
Solution Approach 2:
The heat release structure employs local quality by having different regions with different properties: opaque regions for heat conduction and lattice-shaped transparent portions for light transmission. This local differentiation allows simultaneous achievement of heat dissipation and light transmission without compromising either function.
3Adaptability or versatility
If the LCD is used in a head-up display with a wide field of view, then driver convenience and safety are improved, but heat accumulation increases due to concentrated external light
Solution Approach 1:
The patent converts the harmful concentrated external light into a beneficial effect by using the same light paths that bring external light to the LCD also as paths for heat dissipation. The heat release structure utilizes the incident light energy to drive thermal convection and radiation, transforming the harmful heat accumulation into a controlled heat release process.
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 heat release structure effectively manages thermal energy, maintaining high heat-releasing efficiency without degrading transmittance, ensuring consistent performance and safety across varying field of views.
Implementation Method 1
the heat release structure being configured to release thermal energy of the LCD
Implementation Method 2
at least one of a heat-releasing fin, a heat-releasing fan, and a heat pipe
Implementation Method 3
a heat pipe, wherein the heat release structure is connected to the heat-releasing fin and the heat pipe
Data Source
AI summary
Provided a liquid crystal display (LCD) including a backlight unit, a lower polarizing plate provided on the backlight unit, a lower glass substrate provided on the lower polarizing plate, a plurality of thin-film transistors provided on the lower glass substrate, a liquid crystal layer provided on the plurality of thin-film transistors, the liquid crystal layer including a plurality of liquid crystal cells spaced apart from each other in a lattice structure and respectively corresponding to the plurality of thin-film transistors, a color filter provided on the liquid crystal layer, an upper glass substrate provided on the color filter, an upper polarizing plate provided on the upper glass substrate, and a heat release structure configured to externally release thermal energy of the LCD.