Touchscreen Air Circulation Layout for Sunlight Heat Control
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Solution Overview
Problem
Conventional electric vehicle charging kiosks face issues with high power consumption, heat-related damage to touchscreen devices due to prolonged exposure to sunlight, and inadequate brightness control, leading to reduced performance and lifespan.
Innovation Solution
A touchscreen device with a heated air circulation system, including a fan and temperature sensors, to manage heat dissipation and brightness dynamically, along with an anti-reflection coating and LiDAR sensor for automatic power management and glare reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the backlight unit and liquid crystal panel assembly are mounted in a sealed space, then the device structure is compact and protected, but heat accumulates causing performance deterioration and reduced lifespan
Solution Approach 1:
The sealed space is divided into multiple regions by heat dissipation fins, creating channels for heat to escape. The liquid crystal panel assembly is segmented from the housing interior through these fins, allowing heat to be dissipated while maintaining the sealed protective structure.
Solution Approach 2:
Heat dissipation fins serve as an intermediary structure between the heat-generating components and the external environment. The fins conduct heat away from the sealed space and transfer it to the surrounding air, preventing heat accumulation while maintaining the sealed structure.
2Ease of operation
If the LCD is continuously exposed to strong sunlight, then the device remains visible and functional, but the liquid crystal solidifies causing blackout phenomenon
Solution Approach 1:
The black housing material with high light absorption properties, which initially seemed to worsen heat accumulation, is converted into a beneficial element by adding heat dissipation fins. The absorbed heat is efficiently transferred to the fins and dissipated, transforming the harmful heat into a manageable thermal flow that prevents liquid crystal solidification.
Solution Approach 2:
The heat dissipation fins utilize thermal conduction and convection principles to expand the heat transfer surface area. The fins conduct heat from the liquid crystal panel and dissipate it into the surrounding air through convection, preventing temperature rise that would cause liquid crystal solidification.
3Ease of operation
If the backlight unit is maintained in an on state, then the touchscreen device is always visible, but power consumption increases
Solution Approach 1:
The backlight unit transitions from a static always-on state to a dynamic state that adjusts based on environmental conditions. The controller activates the backlight only when ambient light levels indicate daytime conditions, allowing the system to adapt its power consumption to actual operational needs while maintaining visibility when required.
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 effectively reduces power loss, prevents heat-induced blackout phenomena, enhances touchscreen performance, and extends the lifespan of the device by maintaining optimal operating temperatures and brightness levels.
Implementation Method 1
at least one heated air circulation fan mounted behind the liquid crystal panel assembly in order to forcibly circulate heat between the touch panel and the liquid crystal panel assembly
Implementation Method 2
an anti-reflection (AR) coating layer is formed on the front surface of the touch panel in order to ensure anti-glare performance
Data Source
AI summary
An air-circulation-type touchscreen device includes a touch panel, an LCD device mounted behind the touch panel, a liquid crystal panel assembly disposed in front of the LCD device, an LCD device bracket fixing and supporting the LCD device, and at least one heated air circulation fan mounted behind the liquid crystal panel assembly to forcibly circulate heat between the touch panel and the liquid crystal panel assembly. A heated air flow space is defined between the touch panel and the liquid crystal panel assembly.