ALEXANDRIA, Va., June 4 -- United States Patent no. 12,321,004, issued on June 3, was assigned to DARFON ELECTRONICS CORP. (Taoyuan, Taiwan).

"Backlight keyswitch and backlight module thereof" was invented by Chao-Yu Chen (Taoyuan, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A backlight keyswitch includes a keycap, a support plate, a membrane circuit board and a backlight module. The support plate is disposed under the keycap. The membrane circuit board is disposed in parallel to the keycap and the support plate. The backlight module is disposed under the support plate, which includes a shielding sheet, a light guide panel, a lighting board and a protrusion structure. The shielding sheet includes a...