公开(公告)号：US20210064177A1

公开(公告)日：2021-03-04

申请号：US16997899

申请日：2020-08-19

Applicant: Apple Inc.

Inventor： Ehsan KHAJEH ,  George Ho Yin MAK ,  Marcus YIP ,  Brian Michael KING ,  Aaron Scott TUCKER ,  Jason S. GRIESBACH ,  Paul X. WANG ,  Alex Joseph LEHMANN

IPC: G06F3/041 ,  G06F3/043

Abstract: Ultrasonic force detection systems and methods can be based on propagation of ultrasonic waves in a user's body (e.g., in a user's digit). An amount of force can be determined using time-of-flight (TOF) techniques of one or more ultrasonic waves propagating in the user's body. In some examples, an electronic device including a transducer can be coupled to a digit, and can transmit ultrasonic waves into the digit. As the wave propagates through the thickness of the digit, a reflection of at least a portion of the transmitted wave can occur due to the bone and/or due to reaching the opposite side of the digit (e.g., finger pad). One or more reflections can be measured to determine the amount of force.

公开(公告)号：US20250068285A1

公开(公告)日：2025-02-27

申请号：US18947975

申请日：2024-11-14

Applicant: Apple Inc.

Inventor： Mohammad YEKE YAZDANDOOST ,  Jason S. GRIESBACH ,  Brian M. KING ,  Paul J. GELSINGER ,  Majid GHARGHI ,  Ileana-Georgeta RAU ,  Yang DENG

IPC: G06F3/041 ,  G06F3/042 ,  H01L25/16

Abstract: An electronic device may have a touch sensitive display with optical touch sensors that are insensitive to the presence of moisture. The optical touch sensors may include light sources and light detectors. Light illuminator and detector angular filters (e.g., masks, baffles) can be employed to limit the illumination and receive angles of emitted and detected light to minimize false object detection. In some examples, light illuminator and detector masks and baffles can be formed during the photodiode component fabrication process. Interference filters may be included over the light sources and/or the light detectors to improve discrimination between a user's finger and water, and may have a greater transmission for light at a first incident angle that is greater than the critical angle of the water/cover interface than at a second incident angle that is less than the critical angle.

公开(公告)号：US20230195265A1

公开(公告)日：2023-06-22

申请号：US17954248

申请日：2022-09-27

Applicant: Apple Inc.

Inventor： Qiliang XU ,  Ming YU ,  Xiaonan WEN ,  Ehsan KHAJEH ,  Jason S. GRIESBACH ,  Brian M. KING

IPC: G06F3/043

CPC classification number: G06F3/043

Abstract: Input devices can employ ultrasonic touch sensing capabilities that allow user inputs to be detected through conductive materials, such as metal enclosures. The ultrasonic touch sensing can include generation of ultrasound signals with a piezoelectric layer. The ultrasound signals can be reflected when a user or other object is in contact with a housing, and the reflected signal can be detected by the same piezoelectric layer that produced the ultrasound signal. Such a piezoelectric layer can include a piezoelectric polymer, such as polyvinylidene fluoride (PVDF). An array of electrodes distributed on opposing sides of the use of electric layer can be operated to generate ultrasound signals and detect reflected signals. Such an input device can be operated in conjunction with a conductive (e.g., metallic) housing, conform to a variety of shapes, and be compact and lightweight