The NL6448BC26-26 is a widely used 8.4-inch LCD display module for industrial and embedded applications. Manufactured by NEC (now NLT Technologies), it features a standard 640 × 480 (VGA) resolution and strong outdoor readability.
This article provides a systematic introduction to the NL6448BC26-26, covering its overview, core specifications, structure and operating principle, technical features, interface and electrical connectivity, and typical applications, to help readers gain a complete understanding of the module’s performance.
NL6448BC26-26 Overview
The NL6448BC26-26 is an 8.4-inch diagonal a-Si TFT-LCD display panel produced by NEC LCD Technologies, Ltd.. Designed as a robust solution for industrial and embedded applications, it integrates a WLED backlight system directly into the panel, eliminating the need for an external backlight driver.
The display offers an extended operating and storage temperature range of -30°C to 80°C, making it suitable for cold storage, industrial machinery, and outdoor-graded equipment. Key practical features include lamp replaceability, a long backlight life of at least 70,000 hours, and 180°reverse mounting capability, providing flexibility in system design and installation orientations.
NL6448BC26-26 Specifications
We will provide a detailed introduction to the core electrical, optical, physical, and environmental parameters of the NL6448BC26-26 LCD module, clearly presenting the key performance indicators of this TFT-LCD panel, and providing accurate reference for selection and application design.
TYPE | DESCRIPTION |
Brand | NLT |
Model | |
Size | |
Composition | LCM |
Resolution | 640(RGB)×480, VGA 95PPI |
Luminance | 500 cd/m² (Typ.) |
Contrast Ratio | 1000:1 (Typ.) (TM) |
Viewangle | 80/80/80/80 |
Color Depth | 262K 40% NTSC |
Light Source | 3 strings WLED , 70K hours , Without Driver |
Interface Type | CMOS (1 ch, 6-bit) , 31 pins Connector |
Pixel Format | RGB Vertical Stripe |
Active Area | 174.0(W)×131.4(H) mm |
Frame Rate | 60Hz |
Touchscreen | Without |
Voltage Supply | 3.3/5.0V (Typ.) |
Weight | 260/280g (Typ./Max.) |
Outline Size | 200(W)×152(H) ×8.7(D) mm |
Max Ratings | Operating Temperature:-30 ~ 80 °C ; Storage Temperature: -30 ~ 80°C |
NL6448BC26-26 Structure and Principle
Color LCD module NL6448BC26-26D is composed of the amorphous silicon thin film transistor liquid crystal display (a-Si TFT LCD) panel structure with driver LSIs for driving the TFT (Thin Film Transistor) array and a backlight.
The a-Si TFT LCD panel structure is injected liquid crystal material into a narrow gap between the TFT array glass substrate and a color-filter glass substrate.
Color (Red, Green, Blue) data signals from a host system (e.g. signal generator, etc.) are modulated into best form for active matrix system by a signal processing board, and sent to the driver LSIs which drive the individual TFT arrays.
The TFT array as an electro-optical switch regulates the amount of transmitted light from the backlight assembly, when it is controlled by data signals. Color images are created by regulating the amount of transmitted light through the TFT array of red, green and blue dots.
NL6448BC26-26 Technical Features
The NL6448BC26-26 not only boasts wide operating temperature range but also excels in backlight lifespan, structural stability, and vibration resistance. This section will focus on analyzing the product's key technical features to help readers gain a deeper understanding of its advantages in practical systems.
l High luminance
l High contrast
l Wide viewing angle
l Wide temperature range
l Reversible-scan direction
l 6-bit digital RGB signals
l DE (Data enable) function
l Long life LED backlight
l Replaceable lamp for backlight
l Acquisition product for UL60950-1/CSA C22.2 No.60950-1-03 (File number: E170632)
l Compliant with the European RoHS directive (2011/65/EU) and Delegated Directive (2015/863/EU, Amending Annex II of 2011/65/EU)
NL6448BC26-26 Interface & Electrical Connectivity
The NL6448BC26-26 follows mature industrial display standards in both its interface structure and driving logic, delivering high versatility and reliability.
1. Signal Interface
The module uses a standard 6-bit parallel CMOS interface with a 31-pin connector for signal input, a widely adopted solution in industrial automation and embedded systems that ensures excellent compatibility and ease of integration.For data transmission, RGB signals are input in parallel, supporting up to 262,144 colors (6-bit). The interface relies on precise timing control, including H-sync, V-sync, and pixel clock signals, to ensure stable, jitter-free image display without shifting.
2. Logic Level Driving Requirements
The module’s logic circuit typically uses a typical 3.3V supply voltage. In industrial environments, voltage fluctuations may cause abnormal display or logic errors, so it is recommended to limit variations within ±5% to improve system reliability.In addition, the power-on sequence must be strictly followed: the logic voltage VCC must stabilize before data and clock signals are applied, to avoid latch-up or abnormal initialization in the internal circuitry.
Typical Applications of NL6448BC26-26
The NL6448BC26-26 LCD is widely used in a variety of industrial equipment, including industrial automation, human-machine interfaces (HMI), medical equipment, traffic control systems, and various embedded terminals.
1. Industrial Automation HMI
The NL6448BC26-26 is widely used in PLC control panels and production line monitoring terminals. Its stable image output and wide-temperature performance ensure reliable display under continuous operation.
2. Test & Measurement Instruments
This panel is applied in oscilloscopes, power supply test systems and inspection equipment, delivering stable UI display and adapting to long-term operation in complex electromagnetic environments.
3. Medical Equipment Interfaces
The NL6448BC26-26 can be used in display interfaces for certain medical testing and auxiliary devices. Its long-life backlight and stable performance meet the long-running demands of hospital equipment.
4. Transportation & Infrastructure Systems
It is also used in rail transit control panels, signal monitoring systems and energy management equipment, satisfying high-reliability and continuous-operation requirements.
5. Embedded Industrial Systems
This display is integrated into various embedded control devices such as industrial all-in-one PCs and data acquisition terminals, achieving stable integration and compatibility through its mature parallel interface.
Handling of NL6448BC26-26
1) When handling the LCD module, hold both ends without touching the PCB to avoid damage or misalignment caused by mechanical stress on mounted components.
2) When temporarily placing the product, keep the display surface facing downward to prevent surface damage or pressure marks.
3) Anti-static measures (such as grounding straps and ion blowers) must be used during handling to prevent electrostatic discharge damage.
4) The mounting screw torque must not exceed 0.294 N·m, otherwise bezel deformation may occur.
5) The product must be installed using the designated mounting holes without bending or twisting the unit. Do not apply excessive stress to any part of the module (such as the bezel area), as this may cause display mura.
6) Do not press or rub the display surface. When cleaning, gently wipe it with a soft, dry cloth.
7) Do not push or pull the interface connectors while the product is in operation, as this may cause connection failure or damage.
8) It is recommended to use the original protective film on the polarizer surface. Adhesive protective films may alter color or optical characteristics.
9) Although liquid crystals generally do not leak due to the panel’s structure and surface tension, if contact occurs, wash immediately with soap and water.
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