NEC NL6448BC20-35 | High-Brightness, Rugged 6.5" Industrial VGA Display
The NEC NL6448BC20-35 is an engineering-focused 6.5-inch TFT-LCD module designed for applications where visual clarity, durability, and operational reliability are non-negotiable. This display is not built for the consumer market; it is a purpose-built component for long-lifecycle industrial, medical, and instrumentation systems that demand consistent performance in challenging environments.
Core Engineering Highlights
- Exceptional Readability: With a high brightness of 700 cd/m² and a 600:1 contrast ratio, the NL6448BC20-35 delivers crisp, clear imagery even in high ambient light conditions, reducing operator error and improving data interpretation.
- Industrial-Grade Temperature Range: A wide operating temperature range of -30°C to 80°C ensures stable performance in environments from cold storage facilities to sun-exposed vehicle cabins, eliminating the need for complex and costly thermal management solutions.
- Proven VGA Resolution: The 640 x 480 VGA resolution is a stable standard, ideal for retrofitting legacy systems and for new designs where the graphical user interface is optimized for clarity and function over pixel density.
- Standard LVDS Interface: The integrated 20-pin LVDS Interface simplifies system integration, offering robust noise immunity and allowing for longer cable runs between the display and the controller board—a critical advantage in complex machinery.
Technical Deep Dive: Why It Performs
The performance of the NEC NL6448BC20-35 is rooted in its specific design choices. The use of an advanced a-Si TFT (Amorphous Silicon) active matrix provides a cost-effective yet highly reliable pixel-switching foundation. This is coupled with a powerful LED backlight system, which is the key to its 700-nit brightness. Unlike CCFL backlights of the past, this LED system offers lower power consumption, superior dimming control, and significantly longer operational life, contributing to a lower total cost of ownership. The meticulous panel design ensures minimal color shift across its specified viewing angles, a critical detail for applications where multiple operators may view the screen from different positions. Understanding the fundamentals of TFT technology is key, as detailed in our ultimate guide to TFT-LCDs.
Key Parameters Overview
| Parameter | Value |
|---|---|
| Manufacturer | NEC |
| Model | NL6448BC20-35 |
| Screen Size | 6.5 inches |
| Resolution | 640(RGB)×480 [VGA] |
| Brightness | 700 cd/m² (Typical) |
| Contrast Ratio | 600:1 (Typical) |
| Viewing Angle | 80/80/80/80 (Left/Right/Up/Down) |
| Interface Type | LVDS (1 ch, 6-bit) |
| Operating Temperature | -30°C to 80°C |
| Storage Temperature | -30°C to 80°C |
| Backlight | WLED |
Application Scenarios & Engineering Value
The true value of the NL6448BC20-35 is realized in its target applications:
- Industrial HMIs: In factory automation, its high brightness cuts through ambient glare from overhead lighting, while its rugged temperature range guarantees uptime on the plant floor, whether next to a furnace or in an unheated loading dock. Its durability makes it a prime candidate for engineering displays for extreme environments.
- Test & Measurement Equipment: For portable or benchtop oscilloscopes, spectrum analyzers, and diagnostic tools, the display’s excellent contrast and stable resolution provide precise waveform and data visualization, essential for accurate analysis.
- Medical Monitoring Systems: In patient monitors and diagnostic imaging carts, the display's reliability and consistent optical performance ensure that critical patient data is always legible and accurately represented.
- Transportation & Marine: The panel's ability to withstand extreme temperatures and vibration makes it an excellent choice for vehicle dashboards, public transit information systems, and marine chart plotters.
Frequently Asked Questions (FAQ)
1. Is the LED backlight on the NL6448BC20-35 replaceable?
The WLED backlight system is designed as an integrated part of the display module for maximum reliability and longevity. While not typically user-replaceable, its long rated lifetime (often 50,000+ hours to half-brightness) means it will usually outlast the operational life of the end product. For specific service inquiries, it's best to contact our technical team.
2. Can this display be used in outdoor applications?
With 700 nits of brightness, the NEC NL6448BC20-35 offers excellent readability in shaded outdoor areas or within vehicle cabins. For direct, full-sunlight applications, a display with 1000 nits or more, often combined with optical bonding, would be recommended. You can learn more in our engineer's guide to sunlight-readable HMIs.
3. How does the VGA resolution compare to modern displays?
While modern consumer devices push for higher resolutions, the 640x480 VGA standard offers a key advantage in industrial settings: stability. It requires less processing power, simplifies software development, and is backward-compatible with a vast ecosystem of hardware and legacy systems, making it a strategic choice for maximizing reliability and minimizing development costs.
