3.8 Inch Graphic Display 128x64, STN, ST7565P Driver IC

A compact 3.8 inch graphic display for industrial, instrumentation and metering applications

This 3.8 inch graphic display is a 128x64 STN FSTN monochrome screen with ST7565P driver, 12 o'clock view direction and blue backlight, designed for industrial equipment, instrumentation and metering devices. As a robust Monochrome Display with transmissive, positive mode and built-in DC-DC circuit, it provides high contrast and stable performance in embedded and battery-powered systems.

Why this 3.8 inch graphic display matters

In industrial, instrumentation and metering applications, color is often unnecessary; what matters most is clear text, simple graphics, low power consumption and long-term reliability. The 3.8 inch graphic display combines moderate resolution, classic STN technology and a simple parallel/serial interface in a compact outline suitable for panel-mounted and handheld devices.

• 128x64 resolution on a 3.8 inch diagonal provides clear numeric data, status lines and basic icons.
• FSTN transmissive, positive mode delivers high contrast for easy reading in indoor environments.
• 12 o'clock view direction matches typical front-panel and meter installations.
• Built-in DC-DC circuit and ST7565P driver reduce external components and simplify PCB layout.

How the ST7565P driver and FSTN panel work

The ST7565P is a common single-chip driver for 128x64 graphic LCDs. It supports parallel and serial interfaces and integrates the necessary timing and voltage generation to drive an STN matrix. The FSTN (Film Super Twisted Nematic) panel uses a birefringent film to improve contrast and viewing characteristics compared with basic STN.

• ST7565P driver simplifies MCU interfacing with standard command sets for graphic LCDs.
• FSTN technology improves contrast and reduces ghosting in static and slowly changing UI elements.
• Transmissive, positive mode (dark characters on light background) is familiar and easy to read in control panels and meters.

What to check before buying a 3.8 inch Monochrome Display

When selecting a 3.8 inch graphic display for a project, the key parameters are resolution, display mode, view direction, interface and mechanical fit.

• Confirm the available installation space against the module outline (94.9 × 55.9 × 4 mm).
• Match the connector type (soldering or series/header) with your PCB layout and assembly process.
• Check the view direction (12 o'clock) against the expected viewing angle of the end user.
• Verify the operating and storage temperature ranges against your application environment.

Key specifications of the 3.8 inch graphic display

Customization options for 3.8 inch Monochrome Display projects

RONDELI supports OEM and ODM customization on this 3.8 inch graphic display to help customers integrate the screen into their own industrial, instrumentation and metering devices.

• Connector: soldering pads or header/series connector can be selected according to assembly requirements.
• Backlight: blue LED backlight with 3.0V drive; other colors or brightness levels can be evaluated for special projects.
• Polarizer and viewing direction: alternative view angles and polarizer options can be discussed for non-standard mounting positions.
• Testing: additional reliability tests (temperature cycling, long-term aging) can be arranged according to project requirements.

For deep customization (different outline, special temperature range, unique driver or interface), RONDELI can evaluate feasibility based on target quantity and development timeline.

Typical applications of the 3.8 inch graphic display

This compact 3.8 inch Monochrome Display is suitable for simple user interfaces in industrial, instrumentation and metering devices.

• Industrial equipment: control panels, parameter setting screens and status displays on machines and instruments.
• Instrumentation and metering: energy meters, flow meters, analyzers and other devices requiring clear numeric and text readouts.
• Consumer and IoT: simple handheld gadgets, promotional devices and IoT terminals where color is not required.
• Other equipment: any application that needs a reliable Monochrome Display with 128x64 resolution and low power consumption.

Case example: Monochrome Display for an industrial meter

An instrumentation manufacturer was developing a new industrial meter that required a compact, low-power graphic display.

Buyer Requirement: The buyer needed a 3.8 inch display with 128x64 resolution, high contrast for indoor reading, and simple interface for an MCU-based design.

Solution: RONDELI recommended the 3.8 inch graphic display with 128x64 resolution, FSTN positive mode and ST7565P driver. The built-in DC-DC circuit and blue backlight simplified the customer's power design and PCB layout.

Result: The final module provided clear numeric and text readouts, stable performance over long operating hours, and easy integration with the customer's existing MCU platform.

Frequently asked questions about this 3.8 inch graphic display

Q1: What is the resolution of this 3.8 inch graphic display?

The display has a 128 × 64 resolution, which is suitable for clear numeric data, status lines and simple graphics on industrial and instrumentation devices.

Q2: Can this Monochrome Display work with my existing MCU?

In most cases, yes. The ST7565P driver supports standard parallel and serial interfaces commonly used with microcontrollers. Please share your MCU and interface requirements for confirmation.

Q3: What is the view direction of this 3.8 inch LCD?

The module uses a 12 o'clock view direction, which is suitable for typical front-panel and meter installations where the user views the display from below.

Q4: Is this display suitable for battery-powered devices?

Yes. With low-resolution Monochrome Display technology, built-in DC-DC circuit and efficient blue LED backlight, this module is suitable for battery-powered and low-power applications.

Q5: Can RONDELI support small MOQ for pilot projects?

Yes, RONDELI can support pilot orders for evaluation. Target MOQ and pricing will depend on the chosen configuration and any custom requirements.

About RONDELI Display

RONDELI Display is a manufacturer of Monochrome Display modules, graphic LCDs and TFT solutions for industrial, instrumentation and IoT applications. The company focuses on long-term supply, stable quality and engineering support for OEM and ODM projects. Products are shipped to customers in Europe, America, Asia and other regions, with support from initial selection to mass production.

Request a quote for the 3.8 inch graphic display

For OEM inquiries on this 3.8 inch graphic display, providing the following details helps speed up the quotation process:

• Target application (industrial equipment, meter, instrumentation, IoT device, etc.)
• Connector type (soldering or series/header) and backlight requirements
• Estimated annual quantity and any custom mechanical or electrical requirements

Samples are available prior to bulk order confirmation, with a typical lead time of approximately 2–3 weeks.