Method of compensating density and image forming apparatus performing the same

A method of compensating density for an image forming apparatus, the method comprising:

• performing a sensor compensation mode in which a sensing value of a density sensor unit is compensated;
• and
• performing a density compensation mode in which a density of an image formed on a transfer medium is compensated according to a result of sensing a density of sample patches formed on the transfer medium by using the density sensor unit,
• wherein the density sensor unit is located at a first position for sensing the density of the sample patches formed on the transfer medium when the density compensation mode is performed, and is located at a second position for sensing a density of a reference reflective plate when the sensor compensation mode is performed.

A method of compensating density for an image forming apparatus, the method comprising:

• calibrating a density sensor;
• and
• compensating a density of an image formed on a transfer medium according to a result of sensing a density of sample patches formed on the transfer medium by using the density sensor unit,
• wherein the density sensor unit is located at a first position for sensing the density of the sample patches formed on the transfer medium when the density compensation mode is performed, and is located at a second position for sensing a density of a reference reflective plate when calibrating;
• wherein the distance between the density sensor and the reference reflective plate and the distance between the density sensor and the transfer medium is about the same.