Optical scanner, image display device, head mount display, and heads-up display
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United States of America Patent
Stats
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Sep 26, 2017
Grant Date -
Apr 30, 2015
app pub date -
Oct 28, 2014
filing date -
Oct 29, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An optical scanner includes: a movable plate which includes a light reflection unit; a first torsion bar spring which oscillatably supports the movable plate around a first axis; a displacement portion which is connected to the first torsion bar spring; a second torsion bar spring which oscillatably supports the displacement portion around a second axis intersecting with the first axis; a permanent magnet which is provided on the displacement portion to be inclined with respect to the first axis and the second axis; and a coil which is provided to be separated from the displacement portion and generates a magnetic field acting on the permanent magnet. The displacement portion includes a frame surrounding the movable plate, and a damper which has a smaller thickness than that of the frame and extends in a direction intersecting with a direction in which the second torsion bar spring extends from the frame.
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