Adaptability of Ultrasonic Lamb Wave Touchscreen to the Variations in Touch Force and Touch Area.

ABSTRACT: Previous studies on Lamb wave touchscreen (LWT) were carried out based on the assumption that the unknown touch had the consistent parameters with acoustic fingerprints in the reference database. The adaptability of LWT to the variations in touch force and touch area was investigated in this study for the first time. The automatic collection of the databases of acoustic fingerprints was realized with an experimental prototype of LWT employing three pairs of transmitter-receivers. The self-adaptive updated weight coefficient of the used transmitter-receiver pairs was employed to successfully improve the accuracy of the localization model established based on a learning method. The performance of the improved method in locating single- and two-touch actions with the reference database of dif

SUBMITTER: Yang Z 

PROVIDER: S-EPMC7959317 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature