Method and apparatus to correct power source voltage variation in an image forming system

A computer readable recording medium having embodied thereon a computer program containing a method of correcting a power source voltage variation in an image forming system, comprising:

• calculating a variation between a first power source voltage used to measure a predetermined analog value and a rated power source voltage;
• determining a correction amount with respect to a variation between the first power source voltage and the rated power source voltage when the first power source voltage is different from a second power source voltage for analog-to-digital conversion of the analog value;
• and
• performing digital conversion by applying the correction amount based on the calculated variation to a measured analog value.

An apparatus to correct a power source voltage variation in an image forming system, comprising:

• an image density sensing unit which senses an image density;
• a first variation correction unit which calculates a variation between a first power source voltage of the image density sensing unit and a first reference value, and performs a correction by applying a correction amount based on the calculated variation to an image density sensed in the image density sensing unit;
• an environment detection value measuring unit which measures a roll resistance value for environment recognition;
• and
• a second variation correction unit which calculates a variation between a second power source voltage of the environment detection value measuring unit and a second reference value, and performs correction by applying a correction amount based on the calculated variation to a roll resistance value measured in the environment detection value measuring unit.

An image forming system comprises:

• an image processing unit which converts print data received from a computer requesting printing into image data to drive an engine;
• an engine control unit which receives image data provided by the image processing unit and is in charge of overall engine control by using a predetermined control program;
• an engine unit which forms an image on a paper from the image data provided by the engine control unit;
• an image density sensing unit which senses an image density in the engine unit;
• and
• a first variation correction unit which calculates a variation between a first power source voltage of the image density sensing unit and a first reference value, performs a correction of image density by applying a correction amount with respect to the calculated variation to an image density sensed in the image density sensing unit, performs analog-to-digital conversion of the corrected image density, and provides the converted image density to the engine control unit.

An apparatus to correct a voltage variation in an image forming system, comprising:

• an image density sensing unit which senses an image density;
• an environment detection value measuring unit which measures a roll resistance value for environment recognition;
• and
• a variation correction unit which calculates a variation between a first power source voltage of the image density sensing unit and a first reference value, performs a first correction of the first power source voltage by applying a correction amount based on the calculated variation to an image density sensed in the image density sensing unit, calculates a variation between a second power source voltage of the environment detection value measuring unit and a second reference value, and performs a second correction of the second power source voltage by applying a correction amount based on the calculated variation to a roll resistance value measured in the environment detection value measuring unit.