Power control method for heating roller and device
A technology of power control and heating roller, applied in the field of heating roller, which can solve problems such as circuit damage
Active Publication Date: 2007-11-07
HEWLETT PACKARD DEV CO LP
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Problems solved by technology
The power control principle of the conventional heating roller has the disadvantage that an excessive current may flow through the heating resistor when power is initially or suddenly supplied to the heating roller, which may cause circuit damage
Therefore, when the conventional image forming apparatus receives a print instruction before the control unit (not shown) is initialized, the above-mentioned problem of reducing the print warm-up time limitation becomes more apparent.
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[0035] Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiments are described below in order to explain the present invention by referring to the figures.
[0036]FIG. 2 is a block diagram illustrating a power control device for heating a heating roller according to an embodiment of the present invention. The power control device may include a power supply unit 210, a switching signal generator 212, a first synchronization signal generator 214, a second synchronization signal generator 216, an attenuation signal generator 218, a temperature measurement unit 220, a toner fixing unit 230, The first comparing unit 240 , the second comparing unit 250 , and the checking unit 260 . However, according to an embodiment of the present invention, the switching signal generator 212, the first synchronization signal generator 214,...
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A power control method and apparatus to heat a heating roller. The power control method includes heating a heating roller provided to fix a toner image of print data in an image forming apparatus, the heating roller having a heating resistor to receive roller power, the power control method includes gradually increasing a maximum level of a source power supplied from an external source up to a specific maximum supply level, and supplying the maximum source power to the heating resistor as the roller power while gradually increasing the maximum level of the source power up to a specific maximum supply level (310), measuring a surface temperature of the heating roller, and further supplying (312) the source power of which maximum level is equal to the maximum supply level to the heating resistor as the roller power until the measured surface temperature reaches a specific fixing target temperature, and fixing the toner image onto a fed printing medium. Supplying the source power is performed right after the image forming apparatus is turned on, or right after the image forming apparatus is switched from a standby mode to a print mode.
Description
technical field [0001] The present invention relates to a heating roller (HR) for fixing a toner image, and more particularly, to a heating resistor for heating an image forming apparatus for supplying power from an external source to a heating resistor included in the heating roller. Roll power control method and device. Background technique [0002] In an image forming apparatus such as a printer or a copying machine, an image of print data is formed on a print medium by using a developing material such as toner, the toner image corresponding to the print data is fixed on the print medium, and then, the print medium is The image forming device is discharged, thereby obtaining a printed matter. [0003] The image forming device may use a heating roller having heating resistors. In this case, in order to perform the fixing operation, the surface temperature of the heating roller must be kept around the fixing target temperature, for example, 180°C. [0004] When the imagi...
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IPC IPC(8): G03G15/20G03G15/00
CPCG03G15/20G03G15/2053G03G15/5004H05B1/0241H05B3/0014
Inventor 蔡荣敏韩相龙权重基金洗中赵埈奭
Owner HEWLETT PACKARD DEV CO LP