US 12,327,698 B2
Keyboard device
Chou-Liang Liu, Taipei (TW); Chen-Wei Chan, Taipei (TW); and Tsung-Wen Hsueh, Taipei (TW)
Assigned to Primax Electronics Ltd., Taipei (TW)
Filed by Primax Electronics Ltd., Taipei (TW)
Filed on Jun. 15, 2023, as Appl. No. 18/210,485.
Claims priority of application No. 112116516 (TW), filed on May 3, 2023.
Prior Publication US 2024/0371582 A1, Nov. 7, 2024
Int. Cl. H01H 13/704 (2006.01); H01H 13/705 (2006.01)
CPC H01H 13/704 (2013.01) [H01H 13/705 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A keyboard device, comprising:
a membrane circuit board having a plurality of key regions and a peripheral region surrounding the key regions, wherein the membrane circuit board comprises:
a lower membrane layer;
an upper membrane layer disposed over the lower membrane layer; and
a sensing circuit pattern disposed over the upper membrane layer and in the peripheral region, wherein the sensing circuit pattern comprises a surrounding wire and at least one connecting wire, and the surrounding wire surrounds the key regions, and the at least one connecting wire is connected between two adjacent portions of the surrounding wire; and
a support plate disposed beneath the membrane circuit board.