US 11,705,295 B2
Keyboard
Yi-Wen Chen, Taipei (TW)
Assigned to Lite-On Technology Corporation, Taipei (TW)
Filed by Lite-On Technology Corporation, Taipei (TW)
Filed on Mar. 15, 2022, as Appl. No. 17/694,700.
Claims priority of provisional application 63/160,957, filed on Mar. 15, 2021.
Prior Publication US 2022/0293362 A1, Sep. 15, 2022
Int. Cl. H01H 13/83 (2006.01); H01H 13/7057 (2006.01); H01H 13/704 (2006.01); H01H 13/81 (2006.01); H01H 3/12 (2006.01)
CPC H01H 13/7057 (2013.01) [H01H 13/704 (2013.01); H01H 13/81 (2013.01); H01H 13/83 (2013.01); H01H 3/125 (2013.01); H01H 2219/06 (2013.01); H01H 2219/0621 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A keyboard, comprising:
a backlight module, comprising a light source, a reflective layer, a light guide layer, and a shielding layer, wherein the light source is disposed corresponding to the light guide layer, and the light guide layer is located between the shielding layer and the reflective layer, wherein the light guide layer has a through-hole, and the shielding layer and the reflective layer are in contact with each other in the through-hole of the light guide layer;
a base plate, disposed on the shielding layer;
a membrane circuit, disposed on the base plate, wherein the base plate has a positioning portion extending to the through-hole of the light guide layer, and the positioning portion protrudes toward the reflective layer and is in contact with the reflective layer or the shielding layer; and
a plurality of key structures, disposed on the membrane circuit.