Patent ID: 9634661
Date: 2017-04-25
CPC Classifications: H03K

Claim:
1. An optical switch keyboard, comprising: a circuit module comprising: plural light emitters disposed on a bottom surface of the circuit board, wherein each of the plural light emitters emits a sensing light; plural light receivers corresponding to the plural light emitters, respectively, wherein the plural light receivers are disposed on the bottom surface of the circuit board, wherein when one of the plural light receivers receives the sensing light from a corresponding light emitter, the light receiver generates a corresponding conducting signal; and plural light sources disposed on the circuit board and electrically connected with the circuit board; and plural keys corresponding to the plural light emitters, the plural light receivers and the plural light sources, respectively, wherein the plural keys are disposed on a top surface of the circuit board, and each of the plural keys comprises: a triggering element connected with the keycap and penetrating into the housing, wherein the triggering element has a light-transmissible zone, wherein after a light beam from each light source is transmitted through the light-transmissible zone of the triggering element, the light beam is irradiated on a bottom surface of the keycap, wherein the sensing light from the corresponding light emitter is received by the one of the plural light receivers when the triggering element is in a first position, the sensing light from the corresponding light emitter is not received by the one of the plural light receivers when the triggering element is in a second position, and the circuit board generates a corresponding triggering signal according to a status change of the corresponding conducting signal.