STMicroelectronics' FingerTip FTG2-SLP touchscreen controller enables advanced features to support the latest active matrix organic light-emitting diode (AMOLED) displays that promise greater power savings and extended runtime in smartphones.
Low-temperature polycrystalline oxide (LTPO) AMOLED displays and similar proprietary equivalents dynamically control the screen refresh rate based on usage.
Although it refreshes more slowly with less demanding applications and reserves higher refresh rates for tasks like gaming and streaming, the graphics driver minimizes power consumption and ensures great user experiences.
ST's FTG2-SLP FingerTip controller supports synchronous and asynchronous display operations. This gives OEMs the ability to maintain continuous user interactions as the refresh rate changes dynamically. The controller is also ideal for smartphones with flexible AMOLED displays that integrate the touch panel directly into the OLED emitting layer for an extremely thin profile.
Based on an Arm® Cortex®-M4 core and integrating large flash memory, the FingerTip FTG2-SLP offers complete flexibility to implement advanced touch features. Furthermore, proprietary hardware and firmware developed by ST and a special sleep mode ensure extremely low power consumption, which further contributes to maximizing battery life.
The chip's analog front end (AFE) leverages a differential architecture and multiple scanning methods to ensure flawless touch detection. The internal design also ensures very low intrinsic noise, providing a high signal-to-noise ratio. The 480Hz reporting rate captures all touch events, even when operating at the screen's highest refresh rate.
