1. Introduction
This manual provides essential information for the Gesight 1.78 inch Square AMOLED Display. This low-power consumption AMOLED display features a 368x448 resolution, MIPI/SPI interface, and an integrated Capacitive Touch Panel (CTP) with a TMA525C touch IC. It is primarily designed for wearable devices and medical equipment.
Figure 1: Gesight 1.78 inch AMOLED Display
2. Specifications
The following table details the technical specifications of the 1.78 inch Square AMOLED Display:
| Attribute | Value |
|---|---|
| Display Type | Amoled |
| Interface | SPI, MIPI |
| Screen Size | 1.78 inch |
| Orientation | Portrait |
| Display Color | Full Color |
| Resolution | 368 RGB X 448 |
| Driver IC | RM69090 |
| Active Area (mm) | 28.7 X 34.94 mm |
| Bezel Area (mm) | 30.6 X 37.99 mm |
| Luminance | 350 cd/m² (Typ.) |
| Viewing Angle | 80/80/80/80 (Typ.)(CR≥1000) |
| Color Depth | 16.7M 100% (CIE1931) |
| Voltage Supply | -0.3~5.5 V/-0.3~ 5.5V (VCI/VDDIO) |
| Operating Temp | -20 ~ 70 °C |
| Storage Temp | -40 ~ 80 °C |
| Outline (mm) | 30.6 X 37.99 X 0.2 mm |
| Response | 2 (Typ.)(Tr+Td) ms |
| Used For | Wearable, Smart watch |
| Touch Panel | PCAP, On-Cell(I2C) |
| Contrast Ratio | 100000:1 (Typ.) |
| Outdoor Visibility | Sunlight readable |
| Signal Type | MIPI/SPI |
| Screen Type | AM-OLED, OLED |
| Arrangement | Real RGB |
| Backlight | No B/L |
| Mass | 2.0 g |
For detailed mechanical drawings and pin configurations, please refer to the diagrams below. Full datasheets and initial code are available upon request after order placement.
Figure 2: Display Dimensions and Layout
Figure 3: FPC Connector Details
3. Features and Technology
The Gesight AMOLED display offers several advantages over traditional LCD technology:
- Thin and Lightweight: More than 50% thinner and lighter than LCDs, enabling sleek designs.
- Energy Efficient: Features a clock-mode standby with up to 60 hours of operation, significantly lower power consumption compared to LCDs.
- Superior Visuals: High contrast ratio and wide color gamut deliver sharp, vivid images and consistent display quality from any viewing angle.
- Wide Operating Temperature: Designed to function reliably across a broad temperature range, from -20°C to 70°C (storage -40°C to 80°C).
- Sunlight Readability: Excellent outdoor visibility, making it suitable for various environments.
Figure 4: OLED Sunlight Readability Advantage
This display utilizes Active Matrix OLED (AMOLED) technology. Unlike Passive Matrix OLED (PMOLED), AMOLED employs a drive circuit to control each light-emitting anode, significantly reducing control lines and offering low-power consumption, high resolution, and fast response times. For high-resolution AMOLEDs, Low-Temperature Polysilicon (LTPS) technology is used to achieve higher carrier mobility and lower defect density, ensuring better electrical properties even in small form factors.
Figure 5: PMOLED vs. AMOLED Structure
Figure 6: OLED Wide Operating Temperature Range
4. Setup and Installation
This display is designed for integration into various electronic devices. Proper handling and connection are crucial for optimal performance.
- Preparation: Ensure you have the necessary tools and a clean, static-free workspace.
- Connection: Connect the display's flexible printed circuit (FPC) to your main board using the appropriate MIPI or SPI interface connector. Refer to the detailed FPC diagram (Figure 3) and the full datasheet for precise pin assignments and connection instructions.
- Power Supply: Provide the specified voltage supply (-0.3~5.5 V for VCI/VDDIO) to the display.
- Testing: It is recommended to test the display functionality before final assembly. Demo kits are available for this purpose.
Figure 7: Display Connected to a Demo Kit
Video 1: Demonstration of the AMOLED display in operation.
5. Operation
Once properly installed and powered, the display will function as a visual output and touch input device. The integrated CTP (Capacitive Touch Panel) allows for interactive control via touch gestures. The display supports full-color output with a resolution of 368x448 pixels.
6. Maintenance
To ensure the longevity and optimal performance of your AMOLED display, follow these maintenance guidelines:
- Cleaning: Gently wipe the display surface with a soft, lint-free cloth. Avoid using harsh chemicals or abrasive materials.
- Handling: Always handle the display by its edges. Avoid applying excessive pressure to the screen or flex cable.
- Environmental Conditions: Operate and store the display within the specified temperature ranges (-20°C to 70°C operating, -40°C to 80°C storage) and avoid high humidity.
- Quality Assurance: Gesight implements strict quality control to prevent pixel defects. If any bright or dark dots appear, refer to the troubleshooting section.
Figure 8: Commitment to Defect-Free Displays
7. Troubleshooting
If you encounter issues with your display, consider the following:
- Damaged Part: While products are strictly tested before shipping, if you receive a damaged part, please contact Gesight customer support immediately for assistance and replacement.
- Wrong Part Received: Carefully verify the product against your order. If a mistake was made on our side, keep the part in its original packaging and contact us for a replacement.
- Display Not Functioning: Double-check all connections, power supply, and ensure the correct interface (MIPI/SPI) is being used. Refer to the datasheet for detailed wiring.
- Testing Performance: For quality and performance testing, Gesight offers demo kits and H-DMI converter boards for most displays.
8. User Tips
- Free Connectors: For clients purchasing 3 or more sample displays, Gesight provides free connectors.
- Bulk Purchases: For bulk orders, contact Gesight directly to discuss favorable pricing options.
- Documentation: Full specifications, including display datasheets, IC datasheets, and initial code, are available upon request after placing an order.
Figure 9: Free Converter Board and Connectors Offer
9. Warranty and Support
Gesight is committed to providing quality products and support:
- Product Replacement: In case of a damaged or incorrect part due to a mistake on our side, Gesight will assist in replacing the correct one within 1-3 working days.
- Technical Support: For any inquiries or technical assistance, Gesight aims to reply within 24 hours.
- Documentation: Comprehensive specifications and technical documents are provided to clients after order placement to aid in integration and development.
