Patent ID: 11908415
Assignee: GOOGLE LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 15:
16. A computing device, comprising:
a display;
an under-display sensor that is located underneath the display;
electronics that are configured to cause the computing device to perform operations that include:
receiving an indication to activate the under-display sensor that is located underneath the display of the computing device;
activating a collection of LEDs of the display to provide illumination for the under-display sensor, including activating an LED in the collection of LEDs by:
establishing, by drive circuitry of the LED during a first programming stage of the drive circuitry, a first overdriven voltage across a gate terminal of an LED-driving transistor that is arranged to energize the LED and a source terminal of the LED-driving transistor, the first overdriven voltage being a first excess voltage in excess of a steady state voltage;
establishing, by the drive circuitry of the LED during a second programming stage of the drive circuitry that follows the first programming stage, a second overdriven voltage across the gate terminal of the LED-driving transistor and the source terminal of the LED-driving transistor, the second overdriven voltage being a second excess voltage in excess of the steady state voltage, the second excess voltage being less than the first excess voltage, a voltage difference between the second overdriven voltage and the steady state voltage being less than a voltage difference between the first overdriven voltage and the steady state voltage; and
establishing, by the drive circuitry of the LED during a steady state programming stage of the drive circuitry that follows the first programming stage and the second programming stage, the steady state voltage across the gate terminal of the LED-driving transistor and the source terminal of the LED-driving transistor; and

activating the under-display sensor by reading a signal from the under-display sensor while the collection of LEDs is activated, including while the steady state voltage is programmed across the gate terminal of the LED-driving transistor and the source terminal of the LED-driving transistor.