公开(公告)号：US20220137723A1

公开(公告)日：2022-05-05

申请号：US17577005

申请日：2022-01-16

Applicant: PixArt Imaging Inc.

Inventor： Tien-Chung Yang ,  Yi-Cheng Chiu ,  Cheng-Chih Chang ,  Jui-Te Chiu ,  Yi-Chung Chen

IPC: G06F3/0338 ,  G06F3/03 ,  G05G9/047

Abstract: A force sensor device includes a first structure component, an optical sensor, and a flexible structure component. The optical sensor is disposed on the first structure component. The flexible structure component has a convex portion, and the flexible structure component is assembled with the first structure component to form a chamber in which the optical sensor is disposed. The optical sensor senses light ray transmitted from the flexible structure component to at least one pixel unit to generate at least one differential image and then detects a user's control force applied for the flexible structure component according to the at least one differential image. Differential image is temporal differential image, generated from successive pixel values of a single pixel unit, or is spatial differential image, generated based on temporal differential images of at least two neighboring pixel units.