NEC NL6448AC33-29 10.4 Inch TFT LCD Panel

The NEC NL6448AC33-29 is a 10.4-inch industrial color TFT-LCD panel designed for equipment requiring a 640 × 480 VGA resolution. It uses an amorphous silicon TFT active-matrix structure and provides a traditional 4:3 display format. The panel supports 262,144 colors and was designed specifically with industrial applications in mind, including control-system display terminals, process-controller monitors, and industrial PCs.

The NL6448AC33-29 features a 211.2 × 158.4 mm active display area, 0.33 mm pixel pitch, and an RGB vertical-stripe pixel arrangement. It provides a typical luminance of 250 cd/m² and a 150:1 contrast ratio. One of its notable characteristics is its ultra-wide viewing angle, with approximately 80° viewing angles in all four directions.

For connectivity, the panel uses a 6-bit digital RGB interface with a 31-pin CMOS connector. It operates with a 3.3V or 5.0V logic/LCD supply depending on the specified configuration. The backlight uses two CCFL lamps with an inverter, and the lamp holder is replaceable. These characteristics make the exact connector, pinout, power configuration and backlight arrangement important when using the NL6448AC33-29 as a replacement panel.

Key Features

• NEC NL6448AC33-29 industrial TFT-LCD panel
• 10.4-inch diagonal display
• 640 × 480 VGA resolution
• 4:3 aspect ratio
• a-Si TFT active-matrix technology
• SFT, Normally Black, Transmissive display mode
• 211.2 × 158.4 mm active display area
• 250 cd/m² typical brightness
• 150:1 typical contrast ratio
• 262,144 colors
• RGB vertical-stripe pixel arrangement
• Ultra-wide viewing angle
• 6-bit digital RGB interface
• 31-pin CMOS connector
• 60 Hz operating frequency
• 3.3V / 5.0V LCD logic supply configuration
• Two-CCFL edge-light backlight
• Integrated backlight inverter
• Replaceable CCFL lamp holder
• Variable luminance control
• Reversible scan direction
• Landscape orientation
• Designed for industrial applications
• No integrated touchscreen specified

Technical Specifications

The NEC datasheet identifies the module as a 10.4-inch, 640 × 480 TFT color LCD with 262,144 colors, 250 cd/m² typical luminance, 150:1 contrast ratio, 6-bit digital RGB input and a two-lamp edge-light backlight with inverter.

10.4 Inch 640 × 480 VGA Display

The NL6448AC33-29 provides a 10.4-inch display with a 640 × 480 VGA resolution and a 4:3 aspect ratio. The 211.2 × 158.4 mm active area gives the panel approximately 76 pixels per inch.

The VGA resolution is well suited to legacy industrial interfaces where the display is primarily used for machine parameters, menus, status information, alarms, numerical data and basic graphics.

Because this is an older industrial LCD design, matching the resolution and screen size alone is not sufficient when selecting a replacement. The interface, pinout, supply voltage, physical dimensions and CCFL backlight configuration must also match the target equipment.

Display Technology

The NL6448AC33-29 uses amorphous silicon TFT active-matrix technology. The panel uses an SFT, Normally Black, Transmissive display mode and an RGB vertical-stripe pixel arrangement.

The panel supports 262,144 colors through its 6-bit digital RGB interface. It was designed with a lateral-electric-field configuration intended to provide a wide viewing angle for industrial display applications.

The Normally Black configuration is important when selecting a replacement. Another 10.4-inch VGA panel may have a different optical mode or electrical interface even if its physical size and resolution are similar.

Brightness and Contrast

The NL6448AC33-29 has a typical brightness of 250 cd/m² and a typical contrast ratio of 150:1.

Its typical viewing angle is approximately 80° left, 80° right, 80° upward and 80° downward, measured under the specified contrast-ratio condition. This wide viewing angle was one of the panel's intended characteristics for industrial applications.

The panel uses a clear, anti-reflective surface according to current technical listings. The original NEC documentation describes the panel as having low reflection and specifies no antiglare treatment.

Interface and Connector

The NL6448AC33-29 uses a 6-bit digital RGB interface with a 31-pin CMOS connector. The interface includes RGB data signals along with synchronization and clock signals. The panel also supports a data-enable function.

The available specifications identify the LCD driving/logic supply as 3.3V or 5.0V, depending on the applicable configuration. The exact power configuration should be confirmed against the panel's original documentation before applying power.

Before installation, verify:

• Complete 31-pin connector pinout
• RGB signal assignment
• Hsync and Vsync
• Dot-clock requirements
• Data-enable configuration
• Logic/LCD supply voltage
• Connector orientation
• Display timing
• Controller compatibility

A 31-pin connector alone does not guarantee compatibility. The electrical function of every relevant pin must match.

Backlight

The NL6448AC33-29 uses an edge-light backlight with two CCFL lamps. The backlight assembly includes an inverter, and the lamps are described as replaceable. The original documentation identifies the lamp holder as type 104LHS31.

The specified backlight supply is 12.0V in the technical documentation.

The CCFL system is an important consideration when replacing this panel. A modern LED-backlit 10.4-inch LCD with the same 640 × 480 resolution should not automatically be considered a direct replacement because the backlight power, driver and control requirements can be different.

The CCFL inverter generates high voltage during operation, so appropriate precautions are required during installation and servicing.

Mechanical Dimensions

The NL6448AC33-29 has an active display area of 211.2 × 158.4 mm. The module dimensions are approximately 243.0 × 185.1 × 11.2 mm, with the original documentation specifying a typical depth around 10.5 mm and a maximum depth of 11.2 mm.

The panel weight is approximately 525 g according to current technical references.

Before installing the panel into existing equipment, verify:

• Overall width
• Overall height
• Panel thickness
• Active display area
• Bezel opening
• Mounting-hole positions
• Connector location
• CCFL cable routing
• Inverter clearance
• Rear enclosure clearance

A different 10.4-inch VGA panel can have different mounting dimensions even when the resolution and active area are similar.

Operating Temperature

The NL6448AC33-29 is specified for an operating temperature range of 0°C to +50°C and a storage temperature range of -20°C to +60°C.

These temperature ratings apply to the LCD module. The controller, inverter, power supply, cables and surrounding equipment may have separate environmental limits.

When installing the panel in industrial equipment operating near these limits, the complete display assembly should be evaluated rather than relying only on the LCD panel rating.

Industrial Applications

The NL6448AC33-29 was specifically designed with industrial display applications in mind. Its wide viewing angle, VGA resolution, digital RGB interface and integrated CCFL backlight make it suitable for compatible legacy equipment.

Potential applications include:

• Industrial PCs
• HMI systems
• Control-system display terminals
• Process-controller monitors
• CNC machine interfaces
• Industrial control panels
• Factory automation equipment
• Machine monitoring systems
• Process control equipment
• Industrial instrumentation
• Embedded computer systems
• Operator interface terminals
• Measurement and monitoring equipment
• Legacy industrial machinery

The actual suitability depends on the electrical, mechanical, environmental, controller and backlight requirements of the target equipment.

Compatibility and Replacement Note

The NEC NL6448AC33-29 should be selected as a replacement only after comparing its complete specifications with the original LCD.

Before purchasing or installing the panel, verify:

• Exact original LCD model and suffix
• 10.4-inch screen size
• 640 × 480 resolution
• Active display area
• Overall dimensions
• Panel thickness
• Mounting arrangement
• Connector type and location
• 31-pin connector configuration
• Complete pinout
• 6-bit digital RGB interface
• RGB signal mapping
• Hsync and Vsync
• Dot clock
• Data-enable configuration
• LCD supply voltage
• CCFL backlight configuration
• Two-lamp arrangement
• Inverter compatibility
• Backlight supply
• Controller compatibility
• Operating temperature requirements

Other NEC/NLT LCD models with similar sizes or resolutions should not automatically be treated as interchangeable with the NL6448AC33-29.

A similar 10.4-inch size, 640 × 480 resolution or 31-pin connector does not automatically mean another LCD is a direct replacement.

Connector type alone does not guarantee compatibility. The exact model, dimensions, mounting, pinout, interface, voltage, timing, backlight and controller compatibility should all be verified before installation.

Product Details

Product: NEC NL6448AC33-29 LCD Panel
Brand: NEC
Model: NL6448AC33-29
Display Size: 10.4 inches
Resolution: 640 × 480 pixels, VGA
Panel Type: a-Si TFT-LCD
Display Type: Color TFT-LCD Module
Display Mode: SFT, Normally Black, Transmissive
Interface: CMOS, 1 channel, 6-bit digital RGB
Connector: 31-pin
Brightness: 250 cd/m² typical
Contrast Ratio: 150:1 typical
Supply Voltage: 3.3V / 5.0V configuration
Backlight: 2 × CCFL, edge-light
Backlight Life: Not specified
Backlight Driver: Inverter included
Backlight Supply: 12.0V
Operating Temperature: 0°C to +50°C
Storage Temperature: -20°C to +60°C
Touch Screen: Without touchscreen
Condition: Not specified
Warranty: Not specified

Handling and Installation Precautions

The NL6448AC33-29 contains delicate LCD glass, polarizer material, driver electronics and CCFL backlight components. Careful handling is required during installation.

• Avoid applying pressure directly to the LCD glass.
• Do not scratch or damage the display surface.
• Protect the polarizer from sharp objects.
• Power off the equipment before connecting or disconnecting the LCD.
• Handle the 31-pin connector carefully.
• Do not force the connector into position.
• Verify the complete CMOS RGB pinout before applying power.
• Confirm the required LCD supply voltage.
• Verify RGB signal mapping and timing.
• Confirm Hsync, Vsync, dot-clock and data-enable requirements.
• Verify the two-CCFL backlight configuration.
• Confirm inverter and 12V backlight requirements.
• Do not connect or disconnect the CCFL backlight while power is applied.
• Be aware that CCFL inverter circuits operate at high voltage.
• Follow appropriate ESD precautions when handling the module.
• Keep the LCD away from moisture.
• Avoid dropping, bending, twisting or striking the panel.
• Do not apply excessive pressure to the rear circuit board.
• Protect the signal and CCFL cables from excessive bending.
• Provide sufficient clearance around the connector and inverter.
• Ensure mounting hardware does not place stress on the LCD glass.
• Confirm that the equipment operates within the specified temperature range.

Frequently Asked Questions

What is the NEC NL6448AC33-29?

The NEC NL6448AC33-29 is a 10.4-inch color TFT-LCD panel with a 640 × 480 VGA resolution, 6-bit digital RGB interface and two-lamp CCFL backlight. It was designed for industrial display applications.

What is the resolution of the NL6448AC33-29?

The NL6448AC33-29 has a 640 × 480 pixel VGA resolution.

What is the screen size of the NL6448AC33-29?

The panel has a 10.4-inch diagonal display with a 211.2 × 158.4 mm active display area.

What type of display is the NL6448AC33-29?

It is an a-Si TFT active-matrix color LCD using an SFT, Normally Black, Transmissive display configuration.

How many colors does the NL6448AC33-29 support?

The panel supports 262,144 colors through its 6-bit digital RGB interface.

What is the brightness of the NL6448AC33-29?

The typical brightness is 250 cd/m².

What is the contrast ratio of the NL6448AC33-29?

The typical contrast ratio is 150:1.

What interface does the NL6448AC33-29 use?

The panel uses a 6-bit digital RGB CMOS interface with RGB data, synchronization and clock signals.

How many pins does the NL6448AC33-29 connector have?

The panel uses a 31-pin connector for its CMOS interface. The complete pinout should be verified before installation.

What type of backlight does the NL6448AC33-29 use?

The NL6448AC33-29 uses an edge-light backlight with two CCFL lamps and an inverter. The lamps are replaceable according to the original NEC documentation.

Does the NL6448AC33-29 have a touchscreen?

The standard NL6448AC33-29 is specified as an LCD module without an integrated touchscreen. The original documentation notes that the panel is designed to allow a touch panel to be assembled separately.

What are the dimensions of the NL6448AC33-29?

The module is approximately 243.0 × 185.1 × 11.2 mm, with a 211.2 × 158.4 mm active display area.

What is the operating temperature of the NL6448AC33-29?

The specified operating temperature range is 0°C to +50°C, while the storage temperature range is -20°C to +60°C.

Can the NL6448AC33-29 be used as a replacement LCD?

It can be considered for compatible equipment designed around the NL6448AC33-29 specification. Before installation, verify the exact model, dimensions, mounting, 31-pin pinout, digital RGB interface, supply voltage, timing, CCFL backlight and inverter requirements. A similar screen size, resolution or connector does not automatically guarantee direct compatibility.