Patent ID: 8144380
Filing Date: 2012-03-27
Classification: G02B,H01F,H02K,H02P,H04R,Y10S

Abstract:
1. A drive mechanism of a micro mirror in a digital micro mirror device, comprising: a micro mirror support mechanism; and a drive circuit for supplying a drive signal to said support mechanism; wherein said support mechanism comprises a set formed from a plurality of magnetic bodies, said drive circuit supplies a frequency drive signal to at least one of said magnetic bodies, and said support mechanism inclines said micro mirror by making the magnetic fields from said magnetic bodies interfere with each other, wherein said drive circuit comprises Pulse Width Modulation control means for executing, under the Pulse Width Modulation control, the supply of said frequency drive signal to said magnetic bodies, wherein said set of magnetic bodies is formed from a permanent magnet bar and a coil, wherein one end of said permanent magnet bar supports the center of the back of said micro mirror, said coil is disposed so as to face the other end of said permanent magnet bar, and said drive circuit supplies said frequency drive signal to said coil, wherein a supporting axis of said micro mirror is structured with said permanent magnet bar, wherein a fulcrum of said micro mirror is provided on said permanent magnet bar, and said permanent magnet bar inclines around said fulcrum, and wherein a first incline of said micro mirror is provided by said frequency drive signal with first polarity and first duty ratio of said Pulse Width Modulation control, a second incline of said micro mirror is provided by the drive signal with first or second polarity and second duty ratio of said Pulse Width Modulation control.