摘要:
An image forming apparatus includes an engine unit to perform an image forming job, an engine control unit to control operation of the engine unit, a plurality of brushless direct current (BLDC) motors to operate the engine unit, a communication interface unit to receive a digital control command for the plurality of brushless DC motors from the engine control unit, a sensor unit to sense operation information of the plurality of brushless DC motors, an operation signal unit to generate an operation signal to control the plurality of brushless DC motors, and a speed control unit to control operation of the operation signal unit according to the received digital control command and sensing result of the sensor unit.
摘要:
An image forming apparatus, includes an image forming unit, a driver having a driving unit as a driving source of the image forming unit, a detector which detects driving information of the driving unit, and a controller which controls the driver to operate with a delay time corresponding to a difference between the detected driving information and a reference value.
摘要:
An inkjet printer including a printing medium discriminator discriminates a type of a sheet of paper. The printing medium discriminator includes a media sensor separated by a predetermined height from the sheet of paper, to radiate light onto the sheet of paper and to receive light reflected from the sheet of paper, and a vertical movement unit to adjust a vertical height between the media sensor and the sheet of paper.
摘要:
Disclosed is a scanning method and apparatus for scanning documents in a multifunctional machine. A scanning sensor module moves along the main scanning axis of the apparatus in either a first direction or a second direction opposite the first direction along the same scan line. The scanning sensor module moves to any line in a sub scanning direction and scans the line. Then, the scanning sensor module moves to a second position and re-scans the line. Since the scanning along the main scanning axis is performed at least twice, the total amount of data collected is increased, thus increasing the resolution of the image that is recorded along the main scanning axis.
摘要:
An image forming apparatus includes an engine unit used for performing an image forming job, an engine control unit which controls the operation of the engine unit, a brushless direct current (BLDC) motor which drives the engine unit, a sensor unit which senses the driving information of the BLDC motor, a communication interface unit which receives a digital control command with respect to the BLDC motor from the engine control unit, a driving signal unit which generates a driving signal to control the BLDC motor, and a digital control unit which controls the operation of the driving signal unit in a digital PLL manner, based on the received digital control command, the detected driving information and a digital gain value as a control factor with respect to the BLDC motor.
摘要:
An image forming apparatus and a method thereof for preventing degradation of image quality by a malfunctioning nozzle are disclosed. The image forming apparatus includes a print head including a first nozzle line having a plurality of nozzles arranged with a predetermined pitch I and a second nozzle line disposed at predetermined distance D from the first nozzle line and having a plurality of nozzles arranged to be deviated from the nozzles of the first nozzle line with a predetermined pitch I. A controller controls the print head to inject ink to form at least a portion of dots to be overlapped by ink injected from the nozzles of the first nozzle line.
摘要:
A media detection apparatus and method usable with an image forming apparatus includes a light source to irradiate light to surfaces of recording media, a light receiving part to receive light reflected from the recording media an angle changing unit to change an angle of at least one of the light source and the light receiving part with respect to the recording media, and a controller to determine a type of recording media through signals measured from the light receiving part depending on the angle changed by the angle changing unit. The media detection apparatus is capable of effectively detecting the type of recording media by changing an irradiation angle and reflection angle of light.
摘要:
A method for correcting scanning errors in a shuttle type of a scanner, including the steps of scanning a pattern sheet on which pattern data having a specified shape are recorded. Errors for decline of the pattern data are corrected by using the pattern data having a straight line among the scanned pattern data having the specified shape. Then, errors for distance between bands are corrected by using the pattern data having the specified shape among the pattern data of which the errors for decline are corrected. Accordingly, since the errors for decline and the errors for distance between the bands can be corrected by using a computing program, there is an advantage in that correcting the errors of the pattern data is very simple. A further advantage is in that even if the scanner is subjected to an impact from its exterior, correcting the errors for decline and the errors for distance between the bands can be promptly performed.
摘要:
A document size detection device for a facsimile device that improves the accurately of original document width detection. This reduces the errors generated by using an excessive amount of reduction on received facsimile images. The device uses a rotary document width sensor to increase the degree of accuracy with which the width of a document can be sensed. This also reduces the magnitude of excessive reduction that occurs when a document is improperly loaded and causes a width to be detected that is slightly larger than the actual width.
摘要:
An image forming apparatus includes an engine unit to perform an image forming job, an engine control unit to control operation of the engine unit, a plurality of brushless direct current (BLDC) motors to operate the engine unit, a communication interface unit to receive a digital control command for the plurality of brushless DC motors from the engine control unit, a sensor unit to sense operation information of the plurality of brushless DC motors, an operation signal unit to generate an operation signal to control the plurality of brushless DC motors, and a speed control unit to control operation of the operation signal unit according to the received digital control command and sensing result of the sensor unit.