The FingerTip FTG2-SLP touchscreen controller from STMicroelectronics enables advanced features to support the latest active-matrix organic light-emitting diode (AMOLED) displays that promise more power-saving and extended runtime in smartphones. Low-temperature polycrystalline oxide (LTPO) AMOLED displays, and similar proprietary equivalents, dynamically control the display refresh rate according to usage. While refreshing more slowly with the less demanding…