Scanner for automatically detecting object to be scanned and scanning method using same

A scan method using a scanner provided with a transparent scan region for supporting a scan target, comprising:

• step (a) of providing a scanner which includes an image sensor including a light source for irradiating light toward the scan region and a light receiving element array for sensing the light incident thereon through the scan region, a drive unit configured to linearly move the image sensor across the scan region, and a control unit configured to control the image sensor and the drive unit;
• step (b) of controlling the light source of the image sensor and the drive unit such that the image sensor moves to a detection position and then the light receiving element array senses the light incident thereon through the scan region with the light source turned on and off, and obtaining output signals of the light receiving element array with the light source turned on and off;
• and
• step (c) of comparing the output signals of the light receiving element array obtained by turning on and off the light source and determining, based on a result of the comparison, whether the scan target is placed in the scan region.