Toshiba LT121AC31U00 12.1 Inch TFT LCD Panel

The Toshiba LT121AC31U00 is a 12.1-inch industrial TFT-LCD module designed for equipment requiring an 800 × 600 SVGA display. It uses LTPS TFT-LCD technology and operates in a TN, Normally White, Transmissive display mode. The panel has a traditional 4:3 format and landscape orientation, making it suitable for industrial equipment and legacy display applications.

The LT121AC31U00 is designed around a 12.1-inch display format with an 800 × 600 RGB resolution. Its LTPS TFT-LCD construction provides the display technology used in this module, while the Normally White, Transmissive configuration defines its optical operating mode. Specific brightness, contrast ratio, viewing angle, response time, and physical dimensions are not specified in the supplied product information, so they are not presented as confirmed specifications here.

For signal transmission, the LT121AC31U00 uses a single-channel, 6-bit LVDS interface. Its backlight consists of two CCFL lamps and requires an external driver. These electrical characteristics are particularly important when considering the panel for replacement of an older industrial display.

The panel can be relevant to industrial PCs, machine interfaces, control equipment, instrumentation, and other compatible legacy systems. Before installation, the exact model, connector pinout, LVDS configuration, supply voltage, backlight requirements, mounting dimensions, and controller compatibility should be verified.

Key Features

• Toshiba LT121AC31U00 LCD module
• 12.1-inch diagonal display
• 800 × 600 SVGA resolution
• 4:3 aspect ratio
• LTPS TFT-LCD technology
• TN, Normally White, Transmissive display mode
• RGB Vertical Stripe pixel configuration
• Landscape orientation
• Single-channel, 6-bit LVDS interface
• CCFL backlight
• 2 CCFL lamps
• External backlight driver required
• Industrial and legacy display applications
• Refurbished condition
• 3-month warranty

Technical Specifications

The supplied product page specifically identifies the LT121AC31U00 as a 12.1-inch LTPS TFT-LCD module with 800 × 600 resolution, TN Normally White Transmissive operation, 1-channel 6-bit LVDS and two CCFL lamps without an integrated driver.

12.1 Inch 800 × 600 SVGA Display

The Toshiba LT121AC31U00 features a 12.1-inch display with an 800 × 600 SVGA resolution. The 4:3 format is characteristic of many older industrial computers, operator interfaces, embedded systems, and machine-control displays.

The 800 × 600 resolution provides 480,000 individual pixels and is suitable for displaying menus, machine parameters, numerical information, alarms, status screens, measurement values, and graphical interfaces.

For replacement applications, the 12.1-inch size and SVGA resolution should only be considered part of the compatibility assessment. A replacement panel must also match the electrical interface, pinout, supply requirements, physical dimensions, mounting arrangement, backlight and controller configuration.

Display Technology

The LT121AC31U00 uses LTPS, or Low Temperature Poly-Silicon, TFT-LCD technology. Available references identify the panel as a TN, Normally White, Transmissive display with an RGB Vertical Stripe pixel arrangement.

The Normally White configuration is an important characteristic when replacing the panel. A different 12.1-inch TFT-LCD may use a Normally Black configuration even if it has the same 800 × 600 resolution.

Therefore, selecting a replacement based only on display size and resolution can result in an electrically or optically incompatible panel.

Brightness and Contrast

The supplied product information does not specify the brightness or contrast ratio for the LT121AC31U00. These values should therefore be confirmed from the original technical documentation or the individual panel being supplied rather than assumed from similar Toshiba displays.

This is particularly important for industrial replacement applications where the original equipment may have been designed around a specific luminance or contrast requirement.

Interface and Connector

The LT121AC31U00 uses a single-channel, 6-bit LVDS interface. This provides a digital display connection between the LCD module and its compatible controller.

The supplied product information does not specify the connector pin count or complete pinout. Therefore, these details should be verified against the technical documentation for the exact module before installation.

A connector that appears physically similar does not automatically establish compatibility. The complete LVDS pinout, signal mapping, power connections, timing and controller configuration must be checked.

Before connecting the panel, verify:

• LVDS interface type
• Single-channel configuration
• 6-bit configuration
• Complete connector pinout
• Signal mapping
• Connector orientation
• LCD supply voltage
• Display timing
• Controller compatibility

Backlight

The LT121AC31U00 uses two CCFL lamps for its backlight. The available technical references identify the backlight as an edge-light configuration with two lamps, while the supplied product page specifically states that the lamps are supplied without an integrated driver.

An appropriate external CCFL inverter or driver is therefore required to operate the backlight.

This is an important consideration when replacing the panel. A modern LED-backlit 12.1-inch LCD with the same 800 × 600 resolution may require a completely different backlight power and control arrangement and should not automatically be treated as a direct replacement.

Mechanical Dimensions

The supplied product page does not provide verified active-area or outline-dimension measurements for the LT121AC31U00. These dimensions should therefore be obtained from the applicable technical drawing or checked directly against the original panel before installation.

For replacement applications, verify:

• Overall panel width
• Overall panel height
• Panel thickness
• Active display area
• Bezel opening
• Mounting-hole locations
• Connector position
• CCFL cable routing
• Rear clearance
• Inverter placement

Two 12.1-inch 800 × 600 displays can have different mechanical dimensions and mounting arrangements.

Operating Temperature

Operating and storage temperature specifications are not provided on the supplied product page or the accessible technical references reviewed for this model. They should therefore be confirmed from the applicable Toshiba documentation before using the panel in temperature-sensitive industrial equipment.

The temperature rating of the complete display assembly can also depend on the controller, CCFL inverter, power supply, enclosure and surrounding equipment.

Industrial Applications

The LT121AC31U00 is identified in available references as an industrial application display. Its 12.1-inch SVGA format, LVDS interface and CCFL backlight make it relevant to compatible legacy equipment.

Potential applications include:

• Industrial PCs
• HMI systems
• CNC machine interfaces
• Industrial control panels
• Factory automation equipment
• Machine monitoring systems
• Process control equipment
• Industrial instrumentation
• Measuring equipment
• Embedded computing systems
• Operator interface terminals
• Legacy automation equipment
• Control and monitoring systems
• Compatible industrial machinery

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

Compatibility and Replacement Note

The Toshiba LT121AC31U00 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
• 12.1-inch screen size
• 800 × 600 resolution
• Active display area
• Overall dimensions
• Panel thickness
• Mounting holes and mounting arrangement
• Connector type and location
• Complete LVDS pinout
• Single-channel LVDS configuration
• 6-bit signal configuration
• Display timing
• LCD supply voltage
• CCFL backlight configuration
• Two-lamp configuration
• CCFL inverter compatibility
• Lamp voltage and current requirements
• Controller compatibility
• Operating temperature requirements

A similar 12.1-inch size, 800 × 600 resolution or LVDS interface does not automatically mean another LCD is a direct replacement.

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

The LT121AC31U00 is specifically identified as a single-channel, 6-bit LVDS panel with two CCFL lamps and an external backlight driver requirement. These characteristics should be matched against the original equipment before connecting the replacement.

Product Details

Product: Toshiba LT121AC31U00 LCD Module
Brand: Toshiba
Model: LT121AC31U00
Display Size: 12.1 inches
Resolution: 800 × 600 pixels, SVGA
Panel Type: LTPS TFT-LCD
Display Type: TFT-LCD Module
Display Mode: TN, Normally White, Transmissive
Interface: LVDS, 1 channel, 6-bit
Connector: Not specified
Brightness: Not specified
Contrast Ratio: Not specified
Supply Voltage: Not specified
Backlight: 2 × CCFL
Backlight Life: Not specified
Backlight Driver: External driver required
Operating Temperature: Not specified
Storage Temperature: Not specified
Touch Screen: Not specified
Condition: Refurbished
Warranty: 3 months

Handling and Installation Precautions

The LT121AC31U00 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 the front polarizer.
• Keep sharp tools and hard objects away from the display surface.
• Power off the equipment before connecting or disconnecting the LCD.
• Handle the signal connector carefully.
• Do not rotate or tilt the connector during insertion or removal.
• Verify the complete LVDS pinout before applying power.
• Confirm the required LCD supply voltage before connection.
• Verify LVDS signal mapping and display timing.
• Confirm that the external CCFL driver is compatible.
• Verify the two-lamp backlight configuration.
• 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.
• Wipe water drops away immediately to help prevent discoloration or spots.
• Avoid dropping, bending, twisting or striking the panel.
• Do not apply excessive pressure to the rear circuit board.
• Protect the LCD and backlight cables from excessive bending.
• Do not attempt to open or modify the module unnecessarily.
• Provide sufficient clearance for connectors and CCFL cables.
• Confirm that the equipment operates within the applicable environmental limits.

Frequently Asked Questions

What is the Toshiba LT121AC31U00?

The Toshiba LT121AC31U00 is a 12.1-inch LTPS TFT-LCD module with an 800 × 600 SVGA resolution, TN Normally White Transmissive display mode, single-channel 6-bit LVDS interface and two-CCFL backlight.

What is the resolution of the LT121AC31U00?

The LT121AC31U00 has an 800 × 600 pixel SVGA resolution.

What is the screen size of the LT121AC31U00?

The panel has a 12.1-inch diagonal display.

What type of display is the LT121AC31U00?

It is an LTPS TFT-LCD using a TN, Normally White, Transmissive display configuration.

What interface does the LT121AC31U00 use?

The panel uses a single-channel, 6-bit LVDS interface.

What type of backlight does the LT121AC31U00 use?

The LT121AC31U00 uses two CCFL lamps and requires an external backlight driver.

Does the LT121AC31U00 have a touchscreen?

A touchscreen is not specified for the standard LT121AC31U00 module. It is supplied as an LCD module.

What is the brightness of the LT121AC31U00?

The brightness specification is not provided in the supplied product information. It should be confirmed from the applicable technical documentation for the exact panel.

What is the contrast ratio of the LT121AC31U00?

The contrast ratio is not specified in the supplied product information, so it should not be assumed from another 12.1-inch Toshiba display.

What is the connector type of the LT121AC31U00?

The supplied product information confirms the LVDS connector interface but does not specify the connector pin count. The exact connector and pinout should be verified before installation.

What is the operating temperature of the LT121AC31U00?

An operating temperature range is not specified in the available product information reviewed for this model.

Can the LT121AC31U00 be used as a replacement LCD?

It can be considered for compatible equipment requiring a 12.1-inch 800 × 600 TFT-LCD with a single-channel 6-bit LVDS interface and two-CCFL backlight. Before installation, verify the exact model and suffix, dimensions, mounting, LVDS pinout, supply voltage, display timing, CCFL driver requirements and controller compatibility. A similar screen size, resolution or interface does not automatically guarantee direct compatibility.