What is the difference between metal frames and plastic frames for TFT modules?

In industrial control, smart home, medical equipment, automotive terminals, and outdoor display applications, As the structural carrier of TFT display modules, the frame fixes the LCD panel, backlight unit, and FPC layout, while providing mechanical protection and mounting support. Metal frame TFT modules focus on industrial-grade stability, durability and harsh environment adaptability, while plastic frame modules highlight lightweight design, signal anti-interference and cost advantages. 

1. Metal (Iron) Frame TFT Module: High Rigidity & Ultra-High Stability for Harsh Industrial Scenarios
Best Application Scenarios: Industrial control panels, outdoor high-brightness displays, vehicle-mounted terminals, medical devices, precision instruments, and vibration-prone industrial equipment.
Core Advantages
Superior Mechanical Durability: The high-hardness metal frame effectively resists extrusion, impact and vibration, maintaining stable display performance in high-vibration equipment such as industrial machine tools, vehicle-mounted terminals, and engineering machinery. It greatly improves the module’s drop resistance and structural stability during long-term operation.
Excellent Heat Dissipation & Aging Resistance: Metal materials deliver outstanding thermal conductivity, efficiently exporting heat generated by high-brightness backlight LEDs. This avoids local overheating, ensures long-term brightness consistency, and extends the overall MTBF (Mean Time Between Failures) of the display module, perfectly matching 700–1000cd/㎡ high-brightness display solutions for outdoor and industrial use.
Precision Mounting & Low Deformation: With high dimensional accuracy and minimal thermal expansion and contraction, the iron frame does not deform in wide temperature environments (-20℃ to 70℃). 
Strong Anti-Interference & Shielding Performance: The metal frame forms a stable shielding structure, effectively isolating external electromagnetic interference and ensuring clear and stable display signals in complex industrial electromagnetic environments.

2. Plastic (Rubber) Frame TFT Module: Lightweight & Anti-Interference for Compact Smart Terminals
Best Application Scenarios: Smart home terminals, handheld portable devices, POS cash registers, wearable devices, NFC interactive terminals, and indoor consumer electronic displays.
Core Advantages
Ultra-Lightweight & Slim Structure: The plastic frame is significantly lighter than metal frames, reducing the overall weight of terminal equipment. Its slim and compact structure adapts to narrow installation spaces, perfectly fitting portable devices and miniaturized smart hardware.
Zero Signal Shielding for Wireless Sensing: Different from metal frames that block electromagnetic signals, the non-metallic plastic frame causes no interference to NFC, Bluetooth, WiFi and other wireless sensing signals. It effectively guarantees the stability of antenna induction and signal transmission, which is irreplaceable for intelligent terminals with wireless interaction functions.
High Design Flexibility & Customization: Injection molding supports personalized structural customization, including special-shaped openings, customized FPC outlet directions, and exclusive border sizes. 
Cost-Effective & Anti-Corrosion: The plastic frame features low mold opening cost and stable mass production quality. It has excellent moisture-proof and anti-corrosion properties, adapting to conventional indoor temperature and humidity environments, and maximizing cost performance for consumer display products.