Brightness control for under-display sensor
Номер патента: EP4374362A1
Опубликовано: 29-05-2024
Автор(ы): Chien-Hui Wen, Sang Young Youn
Принадлежит: Google LLC
Опубликовано: 29-05-2024
Автор(ы): Chien-Hui Wen, Sang Young Youn
Принадлежит: Google LLC
Реферат: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for brightness control for under-display fingerprint sensor are disclosed. A method includes receiving, at a computing device, an indication to activate an under-display sensor that is located underneath a 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, a first overdriven voltage across an LED-driving transistor that is arranged to energize the LED; establishing a second overdriven voltage across the LED-driving transistor; and establishing a steady state voltage across the LED-driving transistor; and activating the under-display sensor by reading a signal from the under-display sensor once the collection of LEDs has activated, including once the steady state voltage has been programmed across the LED-driving transistor.
Brightness control for under-display sensor
Номер патента: US11908415B2. Автор: Chien-Hui Wen,Sang Young Youn. Владелец: Google LLC. Дата публикации: 2024-02-20.