Hitachi LMG641 5.4 Inch Monochrome STN LCD Panel

The Hitachi LMG641 LCD Panel is a compact monochrome STN display designed for industrial equipment, embedded systems, instrumentation, control interfaces, and legacy display replacement applications. Available technical references identify the closely matching Hitachi LMG6411PLGE as a 5.4-inch, 240 × 128 pixel STN-LCD module with a wide-format display area.

The display uses STN, grey/blue-positive transmissive technology and provides a monochrome viewing experience suitable for text, numerical values, equipment status, menus, and simple graphics. It has an active area of approximately 119.97 × 63.97 mm and a compact module size of approximately 159.4 × 101 × 9 mm.

The module uses a 10-pin serial data interface, operates from a typical 5.0V LCD supply, and uses an EL backlight. The available specification lists a typical luminance of approximately 10 cd/m² and a 75 Hz vertical frequency.

Model identification note: The available technical references found for this part correspond to LMG6411PLGE rather than a standalone "LMG641" model number. If your physical panel is marked specifically LMG641, verify the complete suffix before using the specifications below.

Key Features

·        Brand: Hitachi

·        Model: LMG641 / LMG6411PLGE

·        Display Size: 5.4 inches

·        Panel Technology: STN-LCD

·        Resolution: 240 × 128 pixels

·        Display Type: Monochrome

·        Display Mode: STN, Grey/Blue Positive, Transmissive

·        Pixel Density: Approximately 50 PPI

·        Active Area: 119.97 × 63.97 mm

·        Outline Dimensions: 159.4 × 101 × 9 mm

·        Brightness: 10 cd/m² typical

·        Contrast Ratio: 3:1 typical

·        Viewing Angle: Approximately 40°

·        Response Time: 250/300 ms (Tr/Td) typical

·        Interface: Serial Data

·        Connector: 10-pin interface pads

·        Frame Rate: 75 Hz

·        LCD Supply Voltage: 5.0V typical

·        Backlight: EL

·        Backlight Voltage: 100V typical

·        Backlight Current: 160mA maximum

·        Operating Temperature: 0°C to 40°C

·        Storage Temperature: -20°C to 60°C

·        Touch Screen: No

·        Orientation: Landscape

These specifications are based on available technical references for the Hitachi LMG6411PLGE.

Technical Specifications

5.4-Inch 240 × 128 Graphic LCD

The Hitachi LMG641 series display provides a 240 × 128 pixel graphic resolution in a compact 5.4-inch format. This resolution allows compatible equipment to display text, numerical readings, menus, icons, status information, and simple graphical elements.

The active display area measures approximately 119.97 × 63.97 mm, while the complete module measures approximately 159.4 × 101 × 9 mm.

Monochrome STN Display Technology

The panel uses STN monochrome display technology in a positive transmissive configuration. This type of display is commonly used in equipment where the primary requirement is displaying operational information rather than high-resolution color graphics.

It can be used to display:

·        Machine parameters

·        Numerical readings

·        Equipment status

·        Warning messages

·        Menus

·        Diagnostic information

·        System information

·        Icons and symbols

·        Simple graphical indicators

10 cd/m² Display Luminance

The available specification lists a typical luminance of approximately 10 cd/m² and a typical contrast ratio of 3:1.

Because this is a relatively low-luminance monochrome display, it is best suited to equipment designed around the original panel's optical characteristics. When replacing an existing unit, the brightness and display mode should be matched carefully.

Serial Data Interface

The LMG6411PLGE uses a 10-pin serial data interface. The module's interface configuration should be checked carefully against the host equipment before installation.

For replacement applications, the number of interface pins alone does not establish compatibility. The pin assignment, signal protocol, timing, voltage levels, and host controller configuration should all be verified.

EL Backlight

The display uses an Electroluminescent (EL) backlight rather than a conventional LED or CCFL arrangement. Available specifications identify a typical 100V backlight voltage and a maximum current of 160mA.

The appropriate EL driving circuitry must be used when powering the backlight. The backlight should not be connected directly to a standard DC supply.

Compact 9 mm Module

The LMG6411PLGE has an outline size of approximately 159.4 × 101 × 9 mm, with an active display area of approximately 119.97 × 63.97 mm.

The compact dimensions make the panel suitable for embedded equipment and legacy systems where the available display space is limited.

Operating Temperature Range

The available specifications indicate an operating temperature range of 0°C to 40°C and a storage temperature range of -20°C to 60°C.

The panel should be operated within the specified environmental limits for reliable performance.

Industrial and Embedded Applications

The Hitachi LMG641 series can be used in equipment requiring a compact monochrome 240 × 128 STN display.

Typical applications include:

·        Industrial control panels

·        Machine control equipment

·        Industrial automation systems

·        Embedded systems

·        Instrumentation

·        Measurement equipment

·        Monitoring equipment

·        Electronic instruments

·        Diagnostic equipment

·        Factory automation

·        Control terminals

·        Legacy industrial equipment

·        OEM equipment

·        Equipment status displays

·        LCD replacement applications

Compatibility and Replacement Note

The Hitachi LMG641 should be treated as a specialized legacy display. Before purchasing or installing a replacement, compare the existing panel against:

·        Complete model number and suffix

·        Resolution

·        Active display area

·        Overall dimensions

·        Mounting arrangement

·        10-pin interface

·        Pin assignment

·        Serial interface configuration

·        LCD supply voltage

·        EL backlight requirements

·        Backlight voltage and current

·        Operating temperature

·        Display orientation

A 240 × 128 monochrome display is not automatically a direct replacement for the LMG641. Electrical, mechanical, interface, and backlight specifications should all match the original equipment.

Product Details

Product: Hitachi LMG641 LCD Panel
Brand: Hitachi
Model: LMG641
Related Technical Model: LMG6411PLGE
Display Size: 5.4 Inch
Resolution: 240 × 128 Pixels
Panel Type: STN-LCD
Display Type: Monochrome
Display Mode: Positive, Transmissive
Pixel Density: Approximately 50 PPI
Active Area: 119.97 × 63.97 mm
Interface: Serial Data
Connector: 10-pin
Frame Rate: 75 Hz
Brightness: 10 cd/m² Typical
Contrast Ratio: 3:1 Typical
LCD Supply: 5.0V Typical
Backlight: EL
Backlight Voltage: 100V Typical
Backlight Current: 160mA Maximum
Operating Temperature: 0°C to 40°C
Storage Temperature: -20°C to 60°C
Touch Screen: No
Orientation: Landscape

Handling and Installation Precautions

·        Handle the display carefully during installation.

·        Do not apply pressure directly to the LCD glass.

·        Avoid scratching the display surface.

·        Switch off the equipment before connecting or disconnecting the panel.

·        Verify the 10-pin interface configuration before applying power.

·        Confirm the 5V LCD supply requirement.

·        Use the appropriate EL backlight driver.

·        Do not connect the EL backlight directly to a standard DC power source.

·        Avoid bending or damaging the interface pads.

·        Protect the panel from moisture and mechanical impact.

·        Follow appropriate ESD precautions.

·        Do not modify or disassemble the module unnecessarily.

Frequently Asked Questions

What is the Hitachi LMG641?

The Hitachi LMG641 is a compact monochrome STN display. Available technical references identify the closely matching LMG6411PLGE as a 5.4-inch, 240 × 128 pixel STN-LCD module.

What is the resolution of LMG641?

The display has a 240 × 128 pixel resolution.

What is the screen size?

The related LMG6411PLGE specification identifies a 5.4-inch diagonal display.

What type of display is LMG641?

It is a monochrome STN-LCD using a positive transmissive display configuration.

What interface does the LMG641 use?

The LMG6411PLGE uses a 10-pin serial data interface.

What is the LCD supply voltage?

The typical LCD supply voltage is 5.0V.

What type of backlight does it use?

The display uses an EL backlight, with a typical backlight voltage of approximately 100V and maximum current of 160mA according to the available specification.

Does the LMG641 have a touch screen?

No. The referenced LMG6411PLGE is specified without an integrated touch screen.

What is the operating temperature?

The specified operating temperature is approximately 0°C to 40°C, with a storage range of -20°C to 60°C.

What are the dimensions?

The related LMG6411PLGE module measures approximately 159.4 × 101 × 9 mm, with an active area of approximately 119.97 × 63.97 mm.

Can LMG641 be used as a replacement LCD?

It can be used as a replacement where the original equipment requires compatible specifications. The complete model suffix, dimensions, 10-pin interface, pinout, 5V supply, and EL backlight requirements should be verified before installation.