During use, touchscreen devices may occasionally exhibit irregular flickering or jumping of images or text on the screen, a phenomenon known as “screen flickering.” This issue can stem from various factors, including hardware malfunctions, software anomalies, external environmental interference, and user operating habits.
1. Hardware-Related Causes
Abnormal Flex Cable Connections: If the device has been dropped or subjected to vibration, internal flex cables may become loose or develop poor contact, leading to unstable signal transmission and subsequent screen flickering.
Solder Joint Failures: Although uncommon, issues like cold solder joints or solder joint separation at the connection points between the ribbon cable and the screen can cause display abnormalities, typically requiring professional repair.
Internal Screen Damage: Displays typically consist of multiple layers, including touch, display, and backlight components. Damage or aging in any layer can cause screen flickering. For example, OLED screens are prone to visual flickering at low brightness levels due to variations in the properties of their light-emitting materials.
Power supply issues: Battery degradation, power module failure, or using non-original charging equipment can cause voltage or current fluctuations, disrupting normal display functionality.
2. Software-related causes
System or application compatibility issues: After system updates or installing new apps, driver conflicts or software incompatibilities may trigger screen flickering.
Insufficient System Resources: Running multiple programs simultaneously may cause system lag, affecting screen refresh rates and resulting in flickering. Restarting the device can often resolve this issue.
Faulty Auto-Brightness Adjustment: When the light sensor is overly sensitive, screen brightness may adjust too frequently in response to ambient light changes, creating a flickering sensation. Try disabling auto-brightness and manually adjusting settings.
3. Environmental Factors
Electromagnetic interference: Using the device near strong magnetic/electric fields (e.g., substations, microwave ovens) may disrupt signal transmission and cause screen flickering.
Static electricity interference: Especially in dry environments, static buildup from friction between the screen and clothing may trigger display abnormalities.
Low-Temperature Environments: Cold temperatures reduce battery activity, causing unstable power supply and potentially triggering screen flickering.
4. Usage Habits
Improper Handling: Applying excessive pressure to the screen or using corrosive cleaning agents may damage the screen structure and flex cables.
Prolonged Continuous Use: Leads to device overheating, accelerating battery and screen aging, and increasing failure risks.
5. Prevention Recommendations
Use original manufacturer charging equipment to ensure stable power supply.
Regularly clear storage space and close unused background apps to reduce system load.
Avoid prolonged phone usage and keep away from strong magnetic fields and extreme temperatures.
Handle the device gently and use dedicated cleaning tools for screen maintenance.
6. Common Solutions
If hardware failure: Send for repair inspection; may require battery replacement, screen replacement, or reconnecting flex cables.
For software issues: Try updating the system, uninstalling recently added apps, or restarting the device.
For environmental interference: Keep away from strong electromagnetic sources, static-prone areas, or cold environments, and maintain stable network connectivity.
Touchscreen flickering may stem from various causes. Users should apply appropriate troubleshooting methods based on specific circumstances. Good usage habits and regular maintenance help minimize this occurrence.