Customer: VoltaCore 
Country: Germany

Product Selling Points – 3.0-inch TFT on High-End Power Bank

• Ultra-wide display area (22.13×72.91 mm) – Clearly shows voltage, current, remaining capacity, charge time, and temperature.

• Full viewing angle (ALL) – Readable from any direction, enhancing user experience.

• High resolution (170×560) – Sharp text and icons for premium feel.

• RGB interface – Fast refresh rate for real-time data updates.

• Wide operating temperature (-20℃ to +70℃) – Suitable for outdoor and travel use.

• Transmissive mode – Works well in both indoor and outdoor light conditions.

Challenge Encountered

During integration, the power bank’s main MCU had limited RGB interface driving capability, causing screen flickering and unstable data display when battery voltage dropped below 3.5V. The display also showed ghosting during fast data updates.

Solution

Goldenvision’s engineering team worked with VoltaCore to:

1. Adjust the RGB timing parameters in the AXS15231B driver IC initialization sequence.

2. Add a dedicated 3.3V LDO regulator to stabilize the display power supply, independent of battery voltage fluctuations.

3. Optimize the MCU’s frame rate to match the display’s recommended refresh timing.

After two rounds of debugging, flickering and ghosting were completely eliminated, even under extreme low-battery conditions.

Advantages of Goldenvision 3.0-inch TFT in This Project

• Quick technical support – Fast response and on-site (remote) debugging assistance.

• Compact mechanical design – Slim appearance (1.58 mm thickness) fits easily into high-end power bank enclosures.

• Reliable long-term operation – Stable performance across storage (-30℃ to +80℃) and working temperature ranges.

• Proven driver IC (AXS15231B) – Excellent compatibility with mainstream MCUs.

• Customizable – RGB interface allows flexible adaptation to different motherboard layouts.