US 2013/0170822 A1 · IMAGE CAPTURING DEVICE AND AUTOMATIC BACKLASH CORRECTION METHOD THEREOF

Abstract

The present invention discloses an image capturing device and an automatic backlash correction method, comprising: a group of zoom lenses, a storage module and a processing module. The processing module drives the group of zoom lenses moving to a datum point to get the moving step value. The current backlash value is then calculated according to the moving step value and the predetermined step value. Then, the difference value between the current backlash value and the predetermined step value are stored in the storage module. The processing module determines whether the difference value is within an allowable error range. When the difference value is within the allowable error range, the processing module writes the current backlash value into the storage module to replace the backlash compensation value. Therefore, the backlash compensation value of the image capturing device can be corrected automatically to enhance image quality.

Claims15

Dependent claims

An image capturing device, comprising:

a group of zoom lenses comprising a datum point;
a storage module storing a moving step value, a backlash compensation value, an allowable error range or a predetermined step value of a forward rotating movement of the group of zoom lenses;
and
a processing module driving the group of zoom lenses to move in a reverse rotation to the datum point to obtain the moving step value, and calculating a current backlash value according to the moving step value and the predetermined step value of the group of zoom lenses, and calculating a difference value according to the current backlash value and the predetermined step value, the processing module determining whether the difference value is within the allowable error range, wherein when the difference value is within the allowable error range, the processing module writes the current backlash value into the storage module to replace the backlash compensation value.

1 more element

An automatic backlash correction method, applicable in an image capturing device, and the image capturing device comprising a group of zoom lenses, a storage module and a processing module, and the automatic backlash correction method comprising steps of:

using the storage module to store a moving step value, a backlash compensation value, an allowable error range or a predetermined step value of the group of zoom lenses moved in a forward rotation;
using the processing module to drive the group of zoom lenses to move in a reverse rotation to a datum point to obtain the moving step value;
calculating a current backlash value according to the moving step value and the predetermined step value by the processing module;
calculating a difference value according to the current backlash value and the predetermined step value of the storage module by the processing module;
determining whether the difference value is within the allowable error range by the processing module;
and
writing the current backlash value into the storage module to substitute the backlash compensation value by the processing module, when the difference value is within the allowable error range.

4 more elements

Dependencies are inferred from the claim text.

Image capturing device and automatic backlash correction method thereof

Life of this patent

Image capturing device and automatic backlash correction method thereof

Life of this patent

Abstract

Claims15