US 11,967,472 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 May 30, 2023, as Appl. No. 18/325,135.
Application 18/325,135 is a division of application No. 17/694,700, filed on Mar. 15, 2022, granted, now 11,705,295.
Claims priority of provisional application 63/160,957, filed on Mar. 15, 2021.
Prior Publication US 2023/0307195 A1, Sep. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01H 13/12 (2006.01); H01H 13/704 (2006.01); H01H 13/7057 (2006.01); H01H 13/81 (2006.01); H01H 13/83 (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)] 18 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 covered by the shielding 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 disposed corresponding to the through-hole of the light guide layer, and the positioning portion protrudes toward the reflective layer or the membrane circuit; and
a plurality of key structures, disposed on the membrane circuit.