公开(公告)号：US20180083619A1

公开(公告)日：2018-03-22

申请号：US15682074

申请日：2017-08-21

Applicant: SOLID YEAR CO., LTD.

Inventor： Chao-Yang HOU ,  Tien-Hao YANG

IPC: H03K17/969 ,  H01H13/70

CPC classification number: H03K17/969 ,  H01H13/70 ,  H03K2217/94102 ,  H03K2217/94112

Abstract: A light control type key switch assembly includes multiple key switch units each including a key switch holder and a key switch mounted in the key switch holder, multiple light receivers respectively mounted around one respective key switch holder, and a light-emitting unit including a light source and a light guide facing toward the light source and neighbored to each key switch holder for guiding the emitted light from the light source along a light path toward each light receiver. When the key switch is not pressed, the plunger of the respective key switch is kept away from the light path, and thus no electrical signal will be generated. When the key switch is pressed, the plunger of the respective key switch enters the light path, causing an electrical signal output.