Optical storage device and optical device
AssigneeFujitsu Limited
InventorTakayuki Kawabe
Life of this patent
Estimating the term…
Abstract
An optical storage device having a lens opposite to a storage medium comprises an actuator that moves the lens,a mechanical shock acceleration sensing means that senses a mechanical shock acceleration, a collision prevention control means that drives the actuator for a predetermined period of time with a first driving force greater than the maximum rating force of the actuator when the mechanical shock acceleration sensed by the mechanical shock acceleration sensing means becomes a value equal to a predetermined value, and then, that drives the actuator with a second driving force smaller than the maximum rating force of the actuator.
Claims20
An optical storage device having a lens opposite to a storage medium comprising:
- an actuator that moves said lens;
- a mechanical shock acceleration sensing unit that senses mechanical shock acceleration;
- a collision prevention control unit that drives said actuator for a predetermined period of time with a first driving force greater than a maximum rating force of said actuator when said mechanical shock acceleration sensed by said mechanical shock acceleration sensing unit becomes a value equal to a predetermined value, and then, that drives said actuator with a second driving force smaller than said maximum rating force of said actuator.
An optical device comprising:
- an actuator that moves a lens;
- a mechanical shock acceleration sensing unit that senses mechanical shock acceleration;
- a collision prevention control unit that drives said actuator for a predetermined period of time with a first driving force greater than a maximum rating force of said actuator when said mechanical shock acceleration sensed by said mechanical shock acceleration sensing unit becomes a value equal to a predetermined value, and then, that drives said actuator with a second driving force smaller than said maximum rating force of said actuator.
An optical storage device having a lens opposite to a storage medium comprising:
- an actuator that moves said lens;
- a mechanical shock acceleration sensing unit that senses mechanical shock acceleration;
- a collision prevention control unit that drives said actuator with a first driving force greater than a force due to the mechanical shock acceleration when said mechanical shock acceleration sensed by said mechanical shock acceleration sensing unit becomes a value equal to a predetermined value, and then, that drives said actuator with a second driving force smaller than a maximum rating force of said actuator when said mechanical shock acceleration sensed by said mechanical shock acceleration sensing unit becomes a value smaller than said predetermined value.
An optical device comprising:
- an actuator that moves a lens;
- a mechanical shock acceleration sensing unit that senses mechanical shock acceleration;
- a collision prevention control unit that drives said actuator with a first driving force greater than the force of the sensed mechanical shock acceleration when said mechanical shock acceleration sensed by said mechanical shock acceleration sensing unit becomes a value equal to a predetermined value, and then, that drives said actuator with a second driving force smaller than a maximum rating force of said actuator when said mechanical shock acceleration sensed by said mechanical shock acceleration sensing unit becomes a value smaller than said predetermined value.
Dependencies are inferred from the claim text.