Hitachi LM238XB 5.9 Inch STN LCD Panel

The Hitachi LM238XB LCD Panel is a 5.9-inch monochrome STN-LCD graphic display designed for industrial equipment, embedded systems, instrumentation, control panels, and legacy display replacement applications. It features a 240 × 128 pixel resolution and a traditional yellow-green positive display configuration.

The LM238XB uses STN LCD technology and is designed as a graphic display rather than a character-only LCD. Its 240 × 128 pixel matrix allows text, numbers, symbols, status information, and simple graphical elements to be displayed. The module uses an 8-bit parallel data interface with 20 active interface pins.

The panel has an active display area of approximately 131.95 × 70.35 mm and overall dimensions of approximately 180 × 120 × 13.8 mm. It operates in landscape orientation and does not include an integrated touch screen.

Key Features

·        Brand: Hitachi

·        Model: LM238XB

·        Display Size: 5.9 inches

·        Display Technology: STN-LCD

·        Display Type: Monochrome Graphic LCD

·        Resolution: 240 × 128 pixels

·        Pixel Density: Approximately 46 PPI

·        Display Mode: STN, Yellow-Green, Positive

·        Active Area: 131.95 × 70.35 mm

·        Outline Dimensions: 180 × 120 × 13.8 mm maximum

·        Pixel Pitch: 0.55 × 0.55 mm

·        Interface: Parallel Data, 8-bit

·        Interface Pins: 20 active pins

·        Orientation: Landscape

·        Touch Screen: No

·        Operating Temperature: 0°C to 40°C

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

·        Typical Weight: Approximately 220 g

Technical Specifications

The technical specifications above are based on available Hitachi documentation and multiple technical references for the LM238XB.

5.9-Inch 240 × 128 Graphic LCD

The LM238XB provides a 5.9-inch display area with a 240 × 128 pixel graphic resolution. Unlike a standard 16×2 or 20×4 character display, its graphic matrix allows the host system to control individual pixels for displaying text, icons, symbols, simple graphics, and equipment status information.

The active area measures approximately 131.95 × 70.35 mm, while the bezel area is approximately 148.0 × 75.0 mm.

Yellow-Green Positive STN Display

The LM238XB uses STN, yellow-green positive display technology and provides a monochrome output. This type of display is commonly found in older industrial and embedded equipment where a simple, readable graphic interface is required.

The monochrome display can be used to show:

·        Machine parameters

·        Numerical readings

·        System status

·        Warning messages

·        Menu screens

·        Diagnostic information

·        Icons and symbols

·        Simple graphical indicators

·        Equipment operating information

8-Bit Parallel Data Interface

The LM238XB uses an 8-bit parallel data interface. Available technical documentation identifies 20 active interface pins, with the interface arranged for data, control, power, and display-bias connections.

The original Hitachi documentation identifies the usable interface pads as A1 through A20 and specifically indicates that the additional B pads should not be used for the LM238XB.

For replacement applications, the complete pin assignment and electrical requirements should be checked before connecting the display.

Integrated Graphic Display Controller

The LM238XB is associated with the HD61830-series graphic LCD controller architecture, providing the control functionality required to operate the 240 × 128 graphic display. Historical technical discussions and documentation identify the controller as part of the module's interface design.

This makes the display suitable for embedded systems where the host controller communicates with the LCD through its parallel control and data interface.

Compact 13.8 mm Module Design

The LM238XB has an overall size of approximately 180 × 120 mm, with a maximum depth of approximately 13.8 mm. The active display area is approximately 131.95 × 70.35 mm.

Its compact rectangular form factor makes it suitable for integration into equipment control panels, instruments, and legacy electronic systems.

Industrial Operating Temperature Range

The LM238XB is specified for an operating temperature range of approximately 0°C to 40°C and a storage temperature range of -20°C to 60°C.

The display should be operated within its specified environmental limits for reliable performance.

Industrial and Embedded Applications

The Hitachi LM238XB can be used in equipment requiring a 240 × 128 monochrome graphic LCD with a parallel interface.

Typical applications include:

·        Industrial control panels

·        Industrial automation equipment

·        Machine control systems

·        Embedded systems

·        Instrumentation equipment

·        Measurement equipment

·        Process monitoring systems

·        Electronic instruments

·        Factory automation

·        Control terminals

·        Diagnostic equipment

·        Legacy industrial systems

·        OEM equipment

·        Equipment status displays

·        LCD replacement applications

Its 240 × 128 graphic resolution allows it to display more flexible content than conventional character-only LCD modules.

Compatibility and Replacement Note

The Hitachi LM238XB is a legacy graphic LCD module, so compatibility should be checked carefully before installation.

Compare the existing display against:

·        Exact model number

·        Display resolution

·        Active display area

·        Overall dimensions

·        Mounting arrangement

·        Interface type

·        20-pin interface configuration

·        Pin assignment

·        8-bit data interface

·        LCD supply requirements

·        Display-bias requirements

·        Operating temperature

·        Controller compatibility

A 240 × 128 LCD is not automatically a direct replacement for the LM238XB. The electrical interface, pinout, display-bias voltage, mechanical dimensions, and controller requirements should be verified before installation.

Product Details

Product: Hitachi LM238XB LCD Panel
Brand: Hitachi
Model: c
Display Size: 5.9 Inch
Resolution: 240 × 128 Pixels
Panel Type: STN-LCD
Display Type: Monochrome Graphic LCD
Display Mode: Yellow-Green, Positive
Pixel Density: Approximately 46 PPI
Active Area: 131.95 × 70.35 mm
Interface: 8-bit Parallel Data
Interface Pins: 20
Outline Dimensions: 180 × 120 × 13.8 mm Max.
Orientation: Landscape
Touch Screen: No
Operating Temperature: 0°C to 40°C
Storage Temperature: -20°C to 60°C
Typical Weight: Approximately 220 g

Handling and Installation Precautions

LCD modules should be handled carefully during transportation and installation.

·        Do not apply excessive pressure to the display surface.

·        Avoid scratching the LCD surface.

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

·        Handle the interface pads and connector carefully.

·        Verify the 20-pin interface configuration before applying power.

·        Confirm the LCD supply and bias voltage requirements.

·        Do not connect unused interface pads to signals.

·        Avoid bending or damaging the display assembly.

·        Keep the module away from excessive moisture.

·        Do not drop or impact the LCD.

·        Follow appropriate ESD precautions during handling.

·        Do not modify or disassemble the module unnecessarily.

Frequently Asked Questions

What is the Hitachi LM238XB?

The Hitachi LM238XB is a 5.9-inch monochrome STN graphic LCD module with a 240 × 128 pixel resolution and an 8-bit parallel interface.

What is the resolution of LM238XB?

The LM238XB has a 240 × 128 pixel graphic resolution.

What is the screen size of LM238XB?

The display has a 5.9-inch diagonal size with an active area of approximately 131.95 × 70.35 mm.

What type of display is LM238XB?

The LM238XB is a monochrome STN-LCD graphic display with a yellow-green positive display mode.

What interface does LM238XB use?

The display uses an 8-bit parallel data interface with 20 active interface pins.

Does the LM238XB have a touch screen?

No. The LM238XB is a display module without an integrated touch screen.

What are the dimensions of LM238XB?

The module measures approximately 180 × 120 mm, with a maximum depth of approximately 13.8 mm.

What is the active display area?

The active area of the LM238XB is approximately 131.95 × 70.35 mm.

What is the operating temperature of LM238XB?

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

Is LM238XB suitable for industrial applications?

Yes. The LM238XB is identified as an industrial-oriented display suitable for industrial equipment, embedded systems, instrumentation, and legacy equipment.

Can LM238XB be used as a replacement LCD?

It can be used as a replacement where the existing equipment requires compatible specifications. Before installation, verify the model, resolution, dimensions, 20-pin interface, pinout, supply and bias requirements, and controller compatibility.