1. Introduction
The GooDisplay 7.5-inch E-Paper Screen Module (GDEY075T7) is a high-resolution, 4-grayscale E-Ink display designed for a wide range of applications requiring low power consumption and persistent display capabilities. Featuring an 800x480 resolution, a wide 170° viewing angle, and bistable technology, this module retains its displayed content even when power is removed. It is an ideal solution for smart homes, digital price tags, industrial instruments, and other applications where eye-friendly, low-power displays are essential. This manual provides essential information for setting up, operating, and maintaining your E-Paper module.
2. Key Features
- High Resolution: 800x480 pixels for clear text and image display.
- 4-Grayscale Display: Supports up to 4 shades of gray for enhanced visual detail.
- Ultra-Low Power Consumption: Minimal energy usage, especially in standby mode.
- Persistent Display: Content remains visible without power due to bistable technology.
- Fast Refresh: Supports a fast refresh rate of 1.5 seconds and a full update refresh rate of 3 seconds.
- Wide Viewing Angle: Offers a 170° viewing angle.
- Eye Comfort: Zero blue light and radiation-free for comfortable extended use.
- Anti-Glare Surface: Hard-coated anti-glare surface ensures clear visibility in bright light.
- Lightweight and Durable Design.
- Environmentally Friendly: E-paper technology reduces reliance on traditional paper and offers energy efficiency.
3. Product Specifications
| Attribute | Value |
|---|---|
| Part Number | GDEY075T7 |
| Type | Dot Matrix / Industrial Monitor |
| Size | 7.5 inch |
| IC Driver | UC8179 |
| Resolution | 800x480 |
| PPI (DPI) | 124.39 |
| Outline Size (mm) | 170.2 x 111.2 x 1.25 |
| Active Size (mm) | 163.2 x 97.72 |
| Pixel Pitch (mm) | 0.204 x 0.204 |
| Operating Temperature | 0℃ ~ 50℃ |
| Storage Temperature | -25℃ ~ 70℃ |
| Connector | 24 Pin FPC |
| Interface | SPI |
| Full Refresh Time (s) | 3 |
| Fast Refresh Time (s) | 1.5 |
| Power Consumption of Refresh (mW) | 26.4 |
| Standby Power Consumption (mW) | 0.0165 |
| Certification | CE |
| Package | Yes |
| Battery Included | No |
| High-concerned chemical | None |
4. Package Contents
The standard package for the GDEY075T7 E-Paper Screen Module includes:
- 1 x GooDisplay 7.5inch E-Paper Screen Module (GDEY075T7)
Depending on your selected option, your package may also include a driver board:
- EPD Option: E-Paper Display module only.
- with HAT Option: E-Paper Display module and a HAT driver board.
- with ESP32 Kit Option: E-Paper Display module and an ESP32 development kit.
5. Setup and Installation
The GDEY075T7 E-Paper module uses an SPI (Serial Peripheral Interface) for communication and connects via a 24 Pin FPC (Flexible Printed Circuit) connector. Proper connection to a compatible driver board is crucial for operation.
5.1 Connecting the E-Paper Module
- Carefully align the 24 Pin FPC connector of the E-Paper module with the corresponding slot on your driver board (e.g., DESPI-C02, DESPI-L(C02), ESP32-L(C02)).
- Gently insert the FPC cable into the connector, ensuring it is fully seated and the locking mechanism (if present) is secured.
- Ensure all pins are correctly aligned to prevent damage to the module or driver board.
5.2 Driver Board Options
For development and testing, GooDisplay offers several compatible driver boards:
- DESPI-C02: A general-purpose E-Paper adapter board for 24 Pin FPC E Ink displays.
- DESPI-L(C02): An industrial Cortex-M MCU-based board with STM32 compatibility, offering low-power performance.
- ESP32-L(C02): An IoT-focused ESP32 board with Wi-Fi/Bluetooth capabilities and ultra-low-power E-Paper control.
- ESP32E6-E01: A dual-interface ESP32-S3 board for Spectra™ 6 and multi-color E-Paper, with wireless connectivity.
Refer to the specific documentation for your chosen driver board for detailed wiring diagrams and programming instructions. A general user manual PDF is available for download (see Section 9).
6. Operation
The E-Paper module operates by receiving commands and image data via its SPI interface from a connected microcontroller or driver board. The display supports different refresh modes to optimize for speed or image quality.
6.1 Display Modes
- Full Update: This mode performs a complete refresh of the entire screen, clearing any ghosting and ensuring the highest image quality. This process takes approximately 3 seconds.
- Fast Update: This mode offers a quicker refresh, typically around 1.5 seconds, suitable for applications where speed is more critical than absolute image purity, though minor ghosting might occur over time.
The module supports 4-grayscale display, allowing for richer visual content compared to simple black and white displays.
6.2 Programming and Control
Controlling the E-Paper module involves sending specific commands and pixel data through the SPI interface. Refer to the programming examples and libraries provided by GooDisplay for your chosen driver board (e.g., C++ samples for STM32, or MicroPython samples for ESP32). These resources will guide you on how to initialize the display, send image data, and trigger refresh cycles.
7. User Tips
- Handle FPC Cable with Care: The FPC (Flexible Printed Circuit) connection cable is delicate. Exercise extreme caution when connecting or disconnecting it to prevent damage.
- MicroPython Development: If using MicroPython, you may need to combine manufacturer-provided C++ samples with basic MicroPython examples to achieve full functionality.
- Power-Off Content Retention: Take advantage of the bistable technology; the display retains its image even when power is removed, making it highly energy efficient for static content.
8. Troubleshooting
If you encounter issues with your GooDisplay 7.5inch E-Paper Screen Module, consider the following:
- No Display/Blank Screen:
- Check all cable connections, especially the FPC cable, to ensure they are securely and correctly seated.
- Verify that the power supply to your driver board is adequate and stable.
- Confirm that your programming code is correctly initializing the display and sending image data.
- Ghosting/Image Retention Issues:
- Perform a full update (3-second refresh) to clear any residual images.
- Ensure your refresh cycles are correctly implemented in your code, especially after frequent partial updates.
- Incorrect Image Display:
- Double-check your image data format and resolution to match the 800x480 requirements of the display.
- Verify that the SPI communication parameters (clock speed, data mode) are correctly configured for your driver board and the E-Paper module.
For more detailed troubleshooting or persistent issues, please refer to the official documentation or contact GooDisplay technical support.
9. Support and Warranty
For further assistance, detailed technical documentation, and programming resources, please refer to the following:
- User Manual (PDF): A comprehensive user manual in PDF format is available for download. This document contains in-depth information on hardware connections, software libraries, and programming guides. Download PDF User Manual
- Official Website: Visit the GooDisplay official website for the latest product information, tutorials, and support forums: www.good-display.com
- Technical Support: If you require direct assistance, please contact our technical support team via email: aliexpress@good-display.com
9.1 Warranty Information
For information regarding product warranty, please contact GooDisplay technical support or refer to the official website. Warranty terms and conditions may vary based on region and purchase date.