The 4.39inch AMOLED (Active-Matrix Organic Light-Emitting Diode) display module is a next-generation screen solution designed for applications requiring high resolution, rich colors, and low power consumption.

This display technology leverages self-emitting pixels that eliminate the need for backlighting, resulting in deeper blacks, wider viewing angles, and higher contrast ratios. The 4.39inch AMOLED display is particularly suitable for wearable electronics, smart home devices, medical instruments, and industrial human-machine interfaces (HMI).

With a full HD+ resolution of 568(W) × 1210(H), this display offers a pixel density of approximately 320 PPI, ensuring crystal-clear visuals even at close distances. Its slim form factor and flexible mounting options make it ideal for compact designs where space is limited.

In this guide, we will explore the core specifications, electrical characteristics, optical performance, interface design, reliability testing, and application scenarios of the 4.39inch AMOLED display module. We will also address frequently asked questions and provide contact information for further support.

Core Specifications of the 4.39inch AMOLED Module

The 4.39inch AMOLED display module offers cutting-edge performance tailored for modern electronic devices. Below are the key technical specifications:

The SD5207 driver IC provides precise control over pixel brightness and refresh rates, while the CST3530 touch controller enables accurate multi-touch detection. The MIPI D-PHY 2 Lane interface ensures fast and stable communication between the host processor and the display module.

Interface Design and Pin Assignments

The module utilizes a MIPI D-PHY 2 Lane interface for high-speed communication with the host controller. It supports both command and video modes, enabling flexibility in application development.

Below is a breakdown of the pin assignments for the FPC connector:

Proper connection of these pins is essential for stable operation. The ELVDD and ELVSS pins provide power to the OLED layer, while AVDD powers the internal charge pump used for generating high voltages required by the OLED pixels. The MIPI differential pairs (D0P/D0N and D1P/D1N) carry display data, and the clock lines (CLKP/CLKN) ensure synchronous data transfer.

Electrical Characteristics

To ensure optimal operation and longevity, it's important to adhere to the specified electrical parameters:

These values must be maintained within the specified range during normal operation. Exceeding them can lead to reduced lifespan or permanent damage to the display. It is recommended to use regulated power supplies and include filtering capacitors near the power input pins to minimize noise and voltage fluctuations.

Optical Performance Metrics

The optical performance of the 4.39inch AMOLED display ensures excellent visibility under various lighting conditions:

The high luminance and contrast ratio make this display highly readable in bright environments. The wide viewing angle ensures consistent image quality from all directions, which is especially useful in public-facing displays such as kiosks or retail signage. The NTSC color gamut coverage of up to 100% means that the display can reproduce a broad range of colors accurately, making it suitable for multimedia and professional imaging applications.

Reliability and Environmental Testing

The module undergoes extensive testing to ensure durability and performance across different environments:

• High-Temp Operation: +70°C for 240 hours

• Low-Temp Operation: -30°C for 240 hours

• Humidity Test: 60°C / 90% RH for 240 hours

• Thermal Shock: -40°C ↔ +80°C, 30 cycles

• ESD Protection: Air discharge ±8kV, Contact discharge ±4kV

These tests guarantee long-term stability and suitability for use in both indoor and outdoor environments. The display maintains functionality even after exposure to extreme temperatures and humidity levels, making it suitable for industrial, automotive, and outdoor applications. Electrostatic discharge (ESD) protection ensures that the module remains operational in environments prone to static electricity buildup.

Application Scenarios

The 4.39inch AMOLED display module is highly versatile and suitable for a variety of embedded and wearable applications:

• Smart Wearables: Smartwatches, fitness bands, and health monitoring devices benefit from the high contrast and compact form factor.

• Medical Devices: Vital signs monitors, portable ECG machines, and diagnostic tools require clear and accurate visuals — this module delivers.

• Industrial Control Panels: Used in HMI (Human Machine Interface) displays, process control units, and automation systems.

• Consumer Electronics: From smart home hubs to audio players, the AMOLED enhances user experience with vivid visuals.

• Automotive Displays: Instrument clusters and dashboard interfaces can integrate this display for better readability and aesthetics.

Due to its energy-efficient design, the module is well-suited for battery-powered devices. The ability to enter low-power modes allows developers to optimize power consumption based on usage patterns. Whether used in consumer products or industrial equipment, the 4.39inch AMOLED display offers an exceptional combination of performance, clarity, and versatility.

Frequently Asked Questions (FAQ)

What is the maximum operating temperature?

The module is rated for continuous operation up to +70°C, making it suitable for most ambient and semi-industrial environments.

Can this display be used outdoors?

Yes, thanks to its high luminance of up to 600 nits and wide viewing angles, the display remains readable even under direct sunlight.

Is there built-in touch functionality?

Absolutely. The CST3530 capacitive touch controller enables multi-touch functionality via the I²C interface, supporting gestures like swipe and pinch-to-zoom.

How long does the display last?

Under standard test conditions (white screen at 25°C), the expected lifespan is approximately 250 hours before significant degradation occurs.

What kind of microcontroller or platform works best with this module?

It is compatible with popular platforms such as STM32, ESP32, Raspberry Pi, and custom FPGA-based controllers using the MIPI D-PHY protocol.

Does the module support sleep mode or power-saving features?

Yes, the SD5207 driver supports multiple power-saving modes including deep sleep, idle mode, and partial display updates, which help extend battery life in mobile applications.

Contact Us

If you have any questions about the 4.39inch AMOLED display module or need assistance with integration, feel free to reach out to our support team.

Email: info@blhlcd.com

WhatsApp: +86 17748574559

We offer sample modules, datasheets, and development kits upon request. Our engineers are ready to assist with hardware compatibility, firmware integration, and custom design requirements.