ALEXANDRIA, Va., Feb. 12 -- United States Patent no. 12,222,536, issued on Feb. 11.
"Touchpad structure" was invented by Ching-Lung Cheng (Taipei, Taiwan), Yuan Du (Jiangsu Province, China) and Jen-Chieh Huang (Taipei, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure is related to a touchpad structure, which includes a cover plate, a backlight unit, a touch circuit layer, a first optical modulation layer, and a second optical modulation layer. The first optical modulation layer is disposed between the cover plate and the backlight unit, and having a first reflectivity. The second optical modulation layer is disposed between the first optical modulation layer and the touch circuit ...