The main STMicroelectronics devices in the display domain are AMOLED PMIC and touch

controllers.

The fully integrated power-management ICs (PMICs) for AMOLED displays combine a low quiescent

a low quiescent current and enhanced flexibility to extend the battery runtime of portable devices.

The trademark FingerTip touch controllers for both small and large screens provide an optimal mix

of ultralow power, small size, and low external part count.

The proprietary ST low-noise capacitive analog front-end ensures very low intrinsic noise, ensuring

the high sensitivity required in new AMOLED displays. The innovative node compensation hardware

provides consistent touch performance across the display panel, including curved and trench areas.

ALS are used to dim the display backlight (photopic lux level), but also to adapt the display tone based on corelated color

temperature (CCT) measurement. Light flicker detection is also available for the smartphone corner camera.

AMBIENT LIGHT SENSOR BLOCK DIAGRAM

Protection

Display domain

LD0

ALS

Vbat

AMOLED

display driver

EEPROM

Touch

controller

AMOLED

DC-DC

Vbat

Haptic driver

25

Display

Subsystem