公开(公告)号：US20210089170A1

公开(公告)日：2021-03-25

申请号：US16938544

申请日：2020-07-24

Applicant: Apple Inc.

Inventor： Supratik DATTA ,  Karan JAIN ,  Zhiyuan SUN ,  Ho Hyung LEE ,  Da YU ,  Wei LIN ,  Nathan K. GUPTA ,  Chun-Chih CHANG

IPC: G06F3/044 ,  G06F3/041

Abstract: A two dimensional touch sensor panel can be thermoformed or curved by another process to a three-dimensional touch sensor panel, and the three-dimensional touch sensor panel can be laminated to a three-dimension surface having a highly curved or spherical shape. In some examples, thermoforming a two-dimensional touch sensor panel into a three-dimensional touch sensor panel can result in strain of the touch electrodes, and can result in non-uniform three-dimensional touch electrodes (distortion of the two-dimensional touch electrode pattern). The strain can be a function of the curved touch-sensitive surface and/or process related mechanical strain from thermoforming. In some examples, a three-dimensional touch sensor panel can be formed with uniform area touch electrodes using a two-dimensional touch sensor panel pattern with non-uniform area touch electrodes in accordance with the strain pattern expected for a given curved surface and thermoforming technique.

公开(公告)号：US20220206630A1

公开(公告)日：2022-06-30

申请号：US17139598

申请日：2020-12-31

Applicant: Apple Inc.

Inventor： Ehsan KHAJEH ,  George Ho Yin MAK ,  Brian Michael KING ,  Karan JAIN

IPC: G06F3/043 ,  G06F3/041

Abstract: Improving the accuracy of ultrasonic touch sensing via the reduction, elimination and/or rejection of parasitic ultrasonic reflections caused by unintended touches is disclosed. The adverse effects of these parasitic reflections can be mitigated by disrupting the symmetry of the true reflections (from the intended touch) and the parasitic reflections (from unintended touches) so that the true touch can be disambiguated from unintended touches. Identification of the true touch can then enable accurate touch localization.