Bidirectional MEMS driving arrangement

摘要

A micro-electromechanical system (MEMS) driving arrangement comprising a driven wheel comprising (n) teeth about an outer periphery thereof, an actuator ring around the driven wheel, itself comprising (n)+(x) teeth about an inner periphery thereof, wherein the (n)+(x) teeth of the actuator ring progressively engage and disengage subsets of the (n) teeth of the driven wheel; a driving actuation assembly, coupled to the actuator ring, for driving the actuator ring in a hysteresis-type motion so as to cause rotation of the driven wheel, wherein after one full cycle of engagements and disengagements between selective subsets of the (n) teeth of the driven wheel with selective subsets of the (n)+(x) teeth of the actuator ring, the driven wheel rotates by (x) teeth corresponding to [(360)(x)/(n)]°.

主权项

1. A micro-electromechanical systems (MEMS) driving arrangement for an electronic device, the micro-electromechanical systems (MEMS) driving arrangement comprising:
a driven wheel having a diameter, comprising (n) teeth about an outer periphery thereof, wherein (n) is a positive integer; an actuator ring having an inner diameter that is greater than the diameter of the driven wheel, comprising (n)+(x) teeth about an inner periphery thereof and wherein (x) is an integer of at least 1; wherein subsets of the (n)+(x) teeth of the actuator ring progressively engage and disengage subsets of the (n) teeth of the driven wheel; a driving actuation assembly, coupled to the actuator ring, for driving the actuator ring in a hysteresis motion so as to cause rotation of the driven wheel, the driving actuation assembly comprising:
a first driving actuator coupled to the actuator ring for selectively pulling the actuator ring in a first direction and pushing the actuator ring in a direction opposite the first direction thereby causing subsets of the (n)+(x) teeth of the actuator ring to engage and disengage subsets of the (n) teeth of the driven wheel;a second driving actuator coupled to the actuator ring for selectively pulling the actuator ring in a second direction and pushing the actuator ring in a direction opposite the second direction, wherein the first direction is perpendicular to the second direction, thereby causing the (n)+(x) teeth of the actuator ring to engage and disengage subsets of the (n) teeth of the driven wheel; wherein the driven wheel rotates in response to engagements and disengagements between selective subsets of the (n) teeth of the driven wheel with selective subsets of the (n)+(x) teeth of the actuator ring.