NL6448BC20-14: A 6.5-inch VGA Display Engineered for High-Luminance Industrial Applications
Content last revised on October 2, 2025.
Delivering Visual Clarity in Demanding Environments
An Engineering Perspective on High-Performance HMIs
The NEC NL6448BC20-14 is an a-Si TFT-LCD module designed for industrial systems requiring robust, long-term visual performance. Its engineering focus is on delivering high luminance and a transflective capability, ensuring screen readability across a wide range of ambient lighting conditions. With a specification of 500 cd/m² brightness and a 400:1 contrast ratio, this display provides the clarity necessary for operators to make accurate decisions. The dual CCFL backlight system is not just a light source but a core component of its reliability, designed to be replaceable to extend the operational life of the host equipment. This design choice directly addresses the total cost of ownership (TCO), a critical metric for industrial capital equipment. For systems that may operate in environments with less extreme lighting and can prioritize power efficiency, the related NL6448BC20-30 offers an alternative configuration to consider.
Key Parameter Overview
Decoding the Specifications for System Integration
The NL6448BC20-14's specifications are tailored for seamless integration into legacy and new industrial control systems. The classic 4:3 aspect ratio and VGA resolution are standard in many HMI applications, simplifying software and hardware compatibility. The use of a standard CMOS (1 ch, 6-bit) interface further reduces design complexity for engineering teams.
| Feature Category | Specification | Engineering Significance |
|---|---|---|
| Display Properties | 6.5" Diagonal, 640x480 (VGA), a-Si TFT-LCD | Provides a standard, compact form factor suitable for control panels and portable diagnostic tools. |
| Optical Performance | 500 cd/m² Brightness, 400:1 Contrast Ratio, Transflective | Ensures high readability in both indoor factory settings and outdoor, high-ambient-light conditions. The transflective nature is key for sunlight viewability. |
| Backlight System | Dual (2) CCFL, Edge Lit, Replaceable | The replaceable lamp design is critical for maintenance, extending the product's field life and reducing long-term service costs. |
| Environmental Tolerance | Operating Temp: 0°C to 60°C; Storage Temp: -25°C to 70°C | Qualified for a range of indoor and controlled industrial environments, from factory floors to control rooms. |
| Mechanical Design | Outline: 178.8 x 126.8 x 11.5 mm; Weight: 260g (Max) | Provides a robust yet manageable physical footprint for integration into space-constrained enclosures. |
Download the NL6448BC20-14 datasheet for detailed specifications and performance curves.
Frequently Asked Questions (FAQ)
What is the primary benefit of the NL6448BC20-14's transflective capability?
Its transflective nature allows the display to reflect ambient light to illuminate the screen, significantly improving readability in direct sunlight or other bright conditions where a purely transmissive display would appear washed out.
How does the replaceable CCFL backlight impact system maintenance and longevity?
The replaceable backlight is a key feature for long-life industrial equipment. Unlike integrated LED backlights, a failing CCFL can be swapped out in the field, which is akin to changing a fuse rather than replacing an entire engine. This extends the operational life of the HMI unit far beyond the typical half-life of the backlight, directly improving the return on investment.
