Focal plane shutter, photographing apparatus including the same, and photographing method for the photographing apparatus

A focal plane shutter comprising:

• a front curtain and a rear curtain rotating about a rotation shaft and formed to be rotatable independently from each other;
• a cam installed on the same side of the focal plane shutter as the front curtain and the rear curtain and rotatable about the rotation shaft, the cam controlling movements of the front curtain and the rear curtain;
• a front curtain lever interposed between the front curtain and the cam to transmit a rotation force of the cam to the front curtain;
• and
• a rear curtain lever interposed between the rear curtain and the cam to transmit the rotation force of the cam to the rear curtain, wherein the cam comprises a front curtain control unit formed in a fan shape having a first angle, and a rear curtain control unit formed in a fan shape having a second angle.

A photographing apparatus comprising:

• a lens through which light is incident;
• an image pickup device converting the incident light into an electrical signal;
• a display unit displaying an image formed by the image pickup device;
• and
• a focal plane shutter interposed between the lens and the image pickup device to control the amount of light incident upon the image pickup device, the focal plane shutter comprising:
• a front curtain and a rear curtain moving relative to each other to expose and conceal the focal plane shutter;
• a cam independently controlling movements of the front curtain and the rear curtain;
• a front curtain lever interposed between the front curtain and the cam to transmit movement of the cam to the front curtain;
• and
• a rear curtain lever interposed between the rear curtain and the cam to transmit movement of the cam to the rear curtain, wherein the cam comprises a front curtain control unit formed in a fan shape having a first angle, and a rear curtain control unit formed in a fan shape having a second angle.

A photographing method performed with a photographing apparatus comprising a focal plane shutter, the photographing method comprising:

• opening the focal plane shutter by using a cam independently controlling rotations of a front curtain and a rear curtain of the focal plane shutter, so as to perform a live view function;
• closing the focal plane shutter by rotating the cam, when a shutter release signal is received, wherein the cam comprises a front curtain control unit formed in a fan shape having a first angle, and a rear curtain control unit formed in a fan shape having a second angle;
• moving the front curtain and the rear curtain of the focal plane shutter one after another with a predetermined period of time inbetween to perform an exposure;
• and
• capturing an image.