Method and apparatus for controlling voltage of image forming apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorJeong-Jai Choi
Life of this patent
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Abstract
According to a method and apparatus for controlling a voltage of an image forming apparatus, a transferring roll resistance, which indicates the resistance between a transferring roller and a photoconductor drum, is detected by applying a first voltage to the transferring roller. A transferring voltage, which corresponds to the detected transferring roll resistance, is applied to the transferring roller with reference to a transferring table which corresponds to the paper resistance, and a transferring is performed on a printing paper by using a transferring roller to which a transferring voltage is applied.
Claims18
A method of controlling a voltage of an image forming apparatus, the method comprising:
- detecting a transferring roll resistance, which indicates a resistance between a transferring roller and a photoconductor drum, comprising applying a first voltage to the transferring roller;
- when a printing paper reaches a conductive member of which one surface thereof is opposite to the photoconductor drum, detecting a paper resistance, which indicates a resistance between the printing paper and the photoconductor drum, comprising applying a second voltage to the conductive member, wherein the printing paper and the conductive member are spaced apart from each other;
- applying a transferring voltage, which corresponds to the detected transferring roll resistance, to the transferring roller with reference to a transferring table which corresponds to the detected paper resistance;
- and
- performing transferring on the printing paper comprising using the transferring roller to which the transferring voltage is applied.
An apparatus to control a voltage of an image forming apparatus, the apparatus comprising:
- a conductive member having a surface opposite to a photoconductor drum of the image forming apparatus;
- a transferring roll resistance detecting unit to detecting a transferring roll resistance, which indicates the resistance between a transferring roller of the image forming apparatus, to which a first voltage is applied, and the photoconductor drum;
- a paper resistance detecting unit to detect a paper resistance, which indicates the resistance between a printing paper passing through the image forming apparatus, which reaches the conductive member to which a second voltage is applied, and the photoconductor drum, wherein the printing paper and the conductive member are spaced apart from each other;
- and
- a voltage applying unit to apply a transferring voltage, which corresponds to the detected transferring roll resistance, to the transferring roller with reference to a transferring table which corresponds to the detected paper resistance.
An image forming apparatus comprising:
- a photoconductor drum;
- a charge roller to charge the photoconductor drum;
- a laser scanning unit to form an electrostatic latent image on the charged photoconductor drum;
- a development roller to develop a visible image to the photoconductor drum on which the electrostatic latent image is formed;
- a transferring roller t transferring the visible image developed to the photoconductor drum to a printing paper;
- a fixing unit to fix the transferred visible image to the printing paper;
- and
- an apparatus to control a voltage applied to the transferring roller according to a paper resistance, which indicates the resistance between the printing paper and the photoconductor drum.
Dependencies are inferred from the claim text.