How do in-vehicle LED displays withstand high temperatures?

In summer, direct sunlight can cause cabin temperatures to reach 60–85°C. Under the combined effects of intense light and high temperatures, in-vehicle LED displays are prone to issues such as LED chip lumen depreciation, driver IC failure, and yellowing or delamination of the encapsulant. So, how can in-vehicle LED displays achieve high-temperature resistance? This has become a topic of widespread concern. Let’s explore this with ALSON below.

In-vehicle LED displays achieve high-temperature resistance through material selection, thermal design optimization, improvements to heat dissipation structures, and enhanced manufacturing processes, as detailed below:

I. Material Selection and Optimization

LED Chips: High-efficiency LED chips are selected to improve electro-optical conversion efficiency and reduce the proportion of electrical energy converted into heat. For example, adopting chip technologies with higher electro-optical conversion efficiency can lower chip heat generation, thereby mitigating the impact of high temperatures on chip performance.

Packaging Materials: In-vehicle LED displays use high-temperature-resistant packaging materials, such as highly thermally conductive ceramics, to improve chip heat dissipation. These materials possess excellent thermal conductivity, helping to rapidly dissipate heat generated by the chips.

Display Cover Materials: High-temperature-resistant and impact-resistant composite materials, such as PC/PMMA composite panels, are selected. These materials not only offer excellent high-temperature resistance but also effectively protect the display from external impacts and scratches.

II. Thermal Design and Heat Dissipation Structure Optimization

Thermal Design: Through thermal simulation analysis, the layout of internal heat sources within the display is optimized to ensure temperature uniformity. A well-designed thermal system prevents excessive temperature variations among LEDs in different areas of the display, which could otherwise affect display quality.

Heat Dissipation Structure: Design efficient heat dissipation structures, such as adding heat sinks or optimizing airflow paths, to enhance cooling efficiency. Heat sinks increase the surface area for heat dissipation, accelerating heat removal; optimized airflow paths ensure smooth air circulation, carrying away more heat.

Application of Thermal Materials: Use highly thermally conductive materials, such as thermal grease and thermal pads, at critical heat source locations to improve heat transfer efficiency. These materials fill the microscopic gaps between the chips and heat sinks, reducing thermal resistance and enhancing heat dissipation.

III. Manufacturing Processes and Quality Control

Manufacturing Processes: In-vehicle LED displays utilize advanced manufacturing processes, such as co-extrusion composite technology, to enhance material performance and reliability. These processes ensure tight bonding between materials, improving the overall performance of the display.

Quality Control: Strict control over raw material quality and production processes ensures the product meets the requirements for use in high-temperature environments. Raw materials undergo rigorous screening and testing to ensure excellent high-temperature resistance; quality monitoring and inspection are strengthened during production to promptly identify and address potential issues.

The high-temperature resistance of in-vehicle LED displays is not achieved through isolated optimizations but rather through a systematic engineering approach encompassing material selection, structural heat dissipation, intelligent temperature control, and automotive-grade testing. Manufacturers must continuously refine their processes regarding full-lamination adhesives, high-thermal-conductivity substrates, active cooling systems, and extreme aging tests to ensure that the entire display maintains consistent brightness, stable color reproduction, and meets lifespan standards even under prolonged exposure to high temperatures.