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US 2012/0257293 A1Published application
Auto-focusing method
AssigneeHon Hai Precision Industry Co., Ltd.
InventorCHAU-YUAN KE
Life of this patent
Estimating the term…
Abstract
An auto-focusing method includes (1) inputting a current with a predetermined greatest value I0 to a voice coil motor, such that the voice coil motor drives a lens module to move a greatest distance to a given position; and (2) gradedly decreasing the current inputted to the voice coil motor by decrement of Δ I, such that the voice coil motor progressively drives the lens module to move backward a corresponding distance away from the given position until a focus position is determined.
Claims5
An auto-focusing method, the method comprising:
- (1) inputting a current with a predetermined greatest value I0 to a voice coil motor, such that the voice coil motor drives a lens module to move a greatest distance to a given position;
- and
- (2) gradedly decreasing the current inputted to the voice coil motor by decrement of Δ I, such that the voice coil motor progressively drives the lens module to move backward a corresponding distance away from the given position until a focus position is determined.
Dependencies are inferred from the claim text.