KR100309986B1 - Apparatus correcting transfer voltage in image forming device - Google Patents
Apparatus correcting transfer voltage in image forming device Download PDFInfo
- Publication number
- KR100309986B1 KR100309986B1 KR1019990005538A KR19990005538A KR100309986B1 KR 100309986 B1 KR100309986 B1 KR 100309986B1 KR 1019990005538 A KR1019990005538 A KR 1019990005538A KR 19990005538 A KR19990005538 A KR 19990005538A KR 100309986 B1 KR100309986 B1 KR 100309986B1
- Authority
- KR
- South Korea
- Prior art keywords
- transfer
- transfer roller
- voltage
- printing paper
- photosensitive drum
- Prior art date
Links
- 230000005611 electricity Effects 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 230000003068 static effect Effects 0.000 claims abstract description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
- G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
- G03G15/163—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap
- G03G15/1635—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap the field being produced by laying down an electrostatic charge behind the base or the recording member, e.g. by a corona device
- G03G15/1645—Arrangements for controlling the amount of charge
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
- G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
- G03G15/1605—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
본 발명은 화상형성장치의 전사전압 보정장치에 관한 것이다.The present invention relates to a transfer voltage correction apparatus of an image forming apparatus.
본 발명의 목적은 전사롤러에 인가된 전사전압이 감광드럼을 통해 그라운드로 흐르지 못하고 용지를 통해 제전가이드로 누설되는 전류를 측정하고, 누설전류에 해당하는 전압을 전사롤러에 인가되는 전사전압에 가산함으로써, 전사전압이 부족하여 발생하는 전사불량을 방지하는 화상형성장치의 전사전압 보정장치를 제공함에 있다.An object of the present invention is to measure the current that the transfer voltage applied to the transfer roller does not flow to the ground through the photosensitive drum, but leaks to the antistatic guide through the paper, and adds the voltage corresponding to the leakage current to the transfer voltage applied to the transfer roller. Accordingly, the present invention provides a transfer voltage correction device of an image forming apparatus that prevents transfer failure caused by a lack of a transfer voltage.
이를 위해 본 발명은, 토너가 도포되어 가시상이 형성되는 감광드럼과, 감광드럼에 형성된 가시상을 인쇄용지에 전사시키는 전사롤러와, 전사롤러에 인쇄용지가 공급되기 전에 인쇄용지가 가지고 있는 정전기를 제거하며, 인쇄용지를 전사롤러에 공급하는 제전가이드를 포함한 화상형성장치에 있어서: 전사롤러에 기 설정된 전사전압을 출력하는 고압인가부와, 고압인가부에서 출력된 전압이 인쇄용지를 통하여 제전가이드로 누설되면, 누설된 전류값을 검출하는 전류검출부 및 전류검출부에서 검출된 전류값에 대응하는 전압을 고압인가부에 피드백(feed back)시키는 제어부를 포함한다.To this end, the present invention, the photosensitive drum to which the toner is applied to form a visible image, the transfer roller for transferring the visible image formed on the photosensitive drum to the printing paper, and the static electricity of the printing paper before the printing paper is supplied to the transfer roller An image forming apparatus comprising an antistatic guide for removing and supplying printing paper to a transfer roller, the image forming apparatus comprising: a high pressure applying unit for outputting a transfer voltage preset to a transfer roller, and a voltage output from the high pressure applying unit through the printing paper. The leakage detection device includes a current detection unit detecting a leaked current value and a control unit feeding back a voltage corresponding to the current value detected by the current detection unit to the high voltage applying unit.
본 발명에 따르면 전사롤러에서 감광드럼을 통해 그라운드로 흐르는 전류가 제전가이드로 누설되더라도, 누설된 전류만큼의 전압이 가산된 전사전압이 전사롤러에 인가되므로 전사전압이 부족하여 발생하는 전사불량을 방지할 수 있는 이점이 있다.According to the present invention, even if the current flowing to the ground through the photosensitive drum in the transfer roller leaks to the antistatic guide, the transfer voltage is added to the transfer roller to prevent the transfer failure caused by the lack of the transfer voltage is applied to the transfer roller There is an advantage to this.
Description
본 발명은 화상형성장치의 전사전압 보정장치에 관한 것으로, 더욱 상세하게는 전사전압에 인가된 전압이 인쇄용지를 안내하는 제전가이드로 누설되어 전사효율이 떨어지는 것을 방지하기 위하여 제전가이드로 누설된 전류를 피드백하여, 누설된 전류에 해당하는 전압을 전사롤러에 인가되는 전사전압에 가산하여 인가하도록 한 화상형성장치의 전사전압 보정장치에 관한 것이다.The present invention relates to a transfer voltage correcting apparatus of an image forming apparatus, and more particularly, a current leaked by the antistatic guide to prevent a drop in transfer efficiency due to leakage of the voltage applied to the transfer voltage to the antistatic guide for guiding printing paper. And a voltage corresponding to the leaked current is added to the transfer voltage applied to the transfer roller and applied.
일반적으로 팩시밀리나 프린터, 복사기 혹은 이들의 기능을 하나의 장치를 통해 복합적으로 구현할 수 있는 복합기 등은 모두 공통적으로 인쇄 기능을 바탕으로 제작된 제품들이며, 따라서 이를 위해 화상형성장치를 구비하고 있다.In general, a facsimile machine, a printer, a copier, or a multifunction device that can realize a combination of these functions through a single device are all products manufactured based on a printing function, and thus, an image forming apparatus is provided.
이러한 화상형성장치는 소정의 이미지데이터를 인쇄하기 위하여 인쇄용지를 픽업하고, 고압의 대전전압에 의해 대전롤러가 회전하면서 감광드럼의 외주면에 형성된 감광체를 고루 대전시키며, 노광장치에서 발생된 빛이 대전된 감광드럼의 표면상에 인쇄하고자 하는 정전잠상을 형성한다. 현상기는 감광드럼에 토너를 공급하며, 감광드럼의 표면에 형성된 정전잠상에 토너가 도포되어 가시상이 형성된다. 고압의 전사전압을 인가받은 전사롤러는 감광드럼의 표면에 도포된 토너가 형성한 가시상을 이송되는 인쇄용지에 전사시키며, 인쇄용지에 전사된 가시상은 정착기의 고열 및 압력에 의해 인쇄용지에 정착된다.The image forming apparatus picks up printing paper to print predetermined image data, charges the photosensitive member formed on the outer circumferential surface of the photosensitive drum while the charging roller is rotated by a high-voltage charging voltage, and the light generated by the exposure apparatus is charged. An electrostatic latent image to be printed is formed on the surface of the photosensitive drum. The developing device supplies toner to the photosensitive drum, and the toner is applied to an electrostatic latent image formed on the surface of the photosensitive drum to form a visible image. The transfer roller applied with the high voltage transfer voltage transfers the visible image formed by the toner applied to the surface of the photosensitive drum to the printing paper to be transported, and the visible image transferred to the printing paper is fixed to the printing paper by the high temperature and pressure of the fixing unit. do.
여기서, 도 1을 참조하여 토너가 도포되어 가시상이 형성된 감광드럼(1)과, 감광드럼(1)에 형성된 가시상을 이송되는 인쇄용지에 전사시키는 고압의 전사전압을 인가받은 전사롤러(2)를 살펴보기로 한다.Here, referring to FIG. 1, a toner is applied to the photosensitive drum 1 having a visible image formed thereon, and a transfer roller 2 to which a high-voltage transfer voltage is applied to transfer the visible image formed on the photosensitive drum 1 to a conveyed printing paper. Let's look at.
-1.4[㎸]의 대전전압이 인가된 대전롤러(미도시)에 의해서 감광드럼(1)의 외주면에 형성된 감광체가 고루 대전되며, 전사롤러(2)에는 고압인가부(5)에서 출력되는 +2.0[㎸]의 전사전압이 인가된다. 인쇄작업이 수행되면, 노광장치(3)는 인쇄데이터에 따라 빛을 방사하고, 방사된 빛에 의해 감광드럼(1)에는 정전잠상이 형성되며, 정전잠상이 형성된 감광드럼(1)에 토너가 도포된다. 인쇄용지가 감광드럼(1)과 전사롤러(2)의 사이에 공급되면 전사롤러(2)에 형성된 전사전압은 감광드럼(1)을 통하여 그라운드로 흐르고, 이에 따라 감광드럼(1)의 표면에 도포된 토너가 형성한 가시상이 인쇄용지에 전사되는 것이다.The photosensitive member formed on the outer circumferential surface of the photosensitive drum 1 is uniformly charged by a charging roller (not shown) to which a charging voltage of -1.4 [kV] is applied, and the + which is output from the high-pressure applying section 5 to the transfer roller 2. A transfer voltage of 2.0 [kV] is applied. When the printing operation is performed, the exposure apparatus 3 emits light according to the print data, and the electrostatic latent image is formed on the photosensitive drum 1 by the emitted light, and toner is applied to the photosensitive drum 1 on which the electrostatic latent image is formed. Is applied. When printing paper is supplied between the photosensitive drum 1 and the transfer roller 2, the transfer voltage formed on the transfer roller 2 flows to the ground through the photosensitive drum 1, and thus the surface of the photosensitive drum 1 The visible image formed by the applied toner is transferred onto printing paper.
이러한 시스템에서 인쇄용지가 전사롤러(2)에 진입하는 부분의 제전가이드(4)는 2가지의 기능을 수행한다.In this system, the antistatic guide 4 at the portion where the printing paper enters the transfer roller 2 performs two functions.
그중 한가지는 용지가 전사롤러(2)에 진입할 때 최적의 전사효율을 얻을 수 있도록 입사각을 안내하는 것이며, 다른 한가지는 용지가 전사롤러(2)에 진입하기 전에 용지가 가지고 있는 정전기를 제거하는 것이다.One of them is to guide the angle of incidence to obtain the optimum transfer efficiency when the paper enters the transfer roller 2, and the other is to remove the static electricity of the paper before the paper enters the transfer roller 2 will be.
정전기는 일반 전기와 달리 흐르지 않고 정지해 있으므로, 전사롤러(2)에 인가된 전사전압이 감광드럼(2)을 통해 그라운드로 흐르는 것을 방지하기 때문에 전사효율이 떨어지게 된다. 이를 방지하기 위하여 제전가이드(4)를 사용하는데, 제전가이드(4)는 용지에 형성된 정전기를 제거하기 위해서는 반드시 그라운드와 연결되어야 한다.Since static electricity does not flow unlike general electricity and stops, transfer efficiency is lowered because the transfer voltage applied to the transfer roller 2 is prevented from flowing to the ground through the photosensitive drum 2. In order to prevent this, the antistatic guide 4 is used, and the antistatic guide 4 must be connected to the ground to remove static electricity formed on the paper.
그러나, 인쇄용지가 제전가이드(4)를 통하여 감광드럼(1)과 전사롤러(2)에 공급될 때, 인쇄용지의 저항이 낮을 경우, 즉 고온고습한 환경이나 인쇄용지에 습기가 많이 포함된 경우에 감광드럼(1)에 형성된 가시상을 인쇄용지로 이동시키기 위해 전사롤러(2)에 인가된 전사전압이 감광드럼(1)을 통하여 그라운드로 흐르지 않고, 용지를 통하여 제전가이드(4)로 흐르게 된다. 왜냐하면, 감광드럼(1)에 형성된 저항보다 용지에 형성된 저항이 낮기 때문이다.However, when the printing paper is supplied to the photosensitive drum 1 and the transfer roller 2 through the antistatic guide 4, when the resistance of the printing paper is low, that is, a lot of moisture is contained in a high temperature, high humidity environment or printing paper. In this case, the transfer voltage applied to the transfer roller 2 to move the visible image formed on the photosensitive drum 1 to the printing paper does not flow to the ground through the photosensitive drum 1, but to the antistatic guide 4 through the paper. Will flow. This is because the resistance formed on the paper is lower than the resistance formed on the photosensitive drum 1.
즉, 전사롤러(2)에 인가된 전사전압이 용지를 통하여 제전가이드(4)로 흐르기 때문에, 전사전압이 부족한 현상이 발생하여 전사효율이 떨어지게 된다. 따라서, 감광드럼(1)에 도포된 토너가 형성한 가시상은 부족한 전사전압을 인가받은 전사롤러(2)로 인하여 인쇄용지가 제대로 전사되지 못하고 잔상(ghost)이 남게 되며, 이에 따라 화상의 품질이 떨어지는 문제점이 발생한다.That is, since the transfer voltage applied to the transfer roller 2 flows to the antistatic guide 4 through the paper, a phenomenon in which the transfer voltage is insufficient occurs and the transfer efficiency is lowered. Therefore, the visible image formed by the toner applied to the photosensitive drum 1 is not properly transferred to the print paper due to the transfer roller 2 applied with the insufficient transfer voltage, and ghosts remain. Falling problem occurs.
따라서, 본 발명은 이와 같은 문제점을 해결하기 위한 것으로서, 본 발명의 목적은 전사롤러에 인가된 전사전압이 감광드럼을 통해 그라운드로 흐르지 못하고 용지를 통해 제전가이드로 누설되는 전류를 측정하고, 누설전류에 해당하는 전압을 전사롤러에 인가되는 전사전압에 가산함으로써, 전사전압이 부족하여 발생하는 전사불량을 방지하는 화상형성장치의 전사전압 보정장치를 제공함에 있다.Therefore, the present invention is to solve such a problem, an object of the present invention is to measure the current leakage to the antistatic guide through the paper without the transfer voltage applied to the transfer roller to the ground through the photosensitive drum, leakage current The present invention provides a transfer voltage correction device of an image forming apparatus which adds a voltage corresponding to the transfer voltage applied to a transfer roller to prevent a transfer failure caused by a lack of a transfer voltage.
도 1은 종래의 화상형성장치를 개략적으로 나타낸 구성도,1 is a configuration diagram schematically showing a conventional image forming apparatus;
도 2는 본 발명에 따른 화상형성장치의 개략적인 구성도.2 is a schematic structural diagram of an image forming apparatus according to the present invention;
＜도면의 주요부분에 대한 부호의 설명＞<Description of the code | symbol about the principal part of drawing>
10 : 제어부20 : 전류검출부30 : 전사롤러10: control unit 20: current detection unit 30: transfer roller
40 : 고압인가부50 : 제전가이드60 : 감광드럼40: high pressure portion 50: antistatic guide 60: photosensitive drum
이와 같은 목적들을 달성하기 위한 본 발명의 특징은, 토너가 도포되어 가시상이 형성되는 감광드럼과, 감광드럼에 형성된 가시상을 인쇄용지에 전사시키는 전사롤러와, 전사롤러에 인쇄용지가 공급되기 전에 인쇄용지가 가지고 있는 정전기를 제거하며, 인쇄용지를 전사롤러에 공급하는 제전가이드를 포함한 화상형성장치에 있어서: 전사롤러에 기 설정된 전사전압을 출력하는 고압인가부와, 고압인가부에서 출력된 전압이 인쇄용지를 통하여 제전가이드로누설되는 누설전류값을검출하는 전류검출부; 및 상기 전류검출부에서 검출된누설전류값에대응하는 전압을 상기 고압인가부가추가로 전사롤러에 인가하도록 제어하는제어부를 포함하는 것에 있다.A feature of the present invention for achieving the above objects is a photosensitive drum on which toner is applied to form a visible image, a transfer roller for transferring the visible image formed on the photosensitive drum onto a printing paper, and before the printing paper is supplied to the transfer roller. An image forming apparatus including an antistatic guide for removing static electricity of printing paper and supplying printing paper to a transfer roller, comprising: a high voltage applying portion for outputting a predetermined transfer voltage to a transfer roller and a voltage output from the high voltage applying portion; A current detector for detecting a leakage current value leaked to the antistatic guide through the printing paper; And a control unit for controlling the high voltage applying unit to apply a voltage corresponding to the leakage current value detected by the current detection unit to the transfer roller .
이하, 본 발명의 바람직한 실시예에 대하여 첨부도면을 참조하여 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 2에는 본 발명에 따른 화상형성장치의 개략적인 구성도가 도시되어 있다.2 is a schematic structural diagram of an image forming apparatus according to the present invention.
도 2를 참조하면, 제어부(10)는 시스템을 전반적으로 제어하며, 특히 전류검출부(20)로부터 입력된 전류에 대응하는 전압을 전사롤러(30)에 인가되는 전사전압에 가산하여 인가하도록 고압인가부(40)를 제어한다.Referring to FIG. 2, the controller 10 controls the system as a whole, and in particular, a high pressure is applied to add a voltage corresponding to the current input from the current detector 20 to the transfer voltage applied to the transfer roller 30. The unit 40 is controlled.
전류검출부(20)는 제전가이드(50)와 그라운드 사이에 설치되어 전사롤러(30)에 형성된 전사전압이 감광드럼(60)을 통해 그라운드로 흐르지 못하고 제전가이드(50)로 누설되는 전류값을 센싱하여 제어부(10)에 입력시킨다.The current detecting unit 20 is installed between the antistatic guide 50 and the ground to sense the current value leaked to the antistatic guide 50 without the transfer voltage formed on the transfer roller 30 flowing to the ground through the photosensitive drum 60. To be input to the controller 10.
고압인가부(High Voltage Power Supply; 이하 HVPS라 함)(40)는 제어부(10)의 제어에 의해 전사에 필요한 전사전압을 전사롤러(30)에 인가한다.The high voltage power supply (hereinafter referred to as HVPS) 40 applies the transfer voltage necessary for the transfer to the transfer roller 30 under the control of the control unit 10.
제전가이드(50)는 용지를 감광드럼(60)과 전사롤러(30)의 사이에 공급되도록 안내하며 그라운드와 연결된다.The antistatic guide 50 guides the paper to be supplied between the photosensitive drum 60 and the transfer roller 30 and is connected to the ground.
이와 같이 구성된 본 발명의 동작을 살펴보면 다음과 같다.Looking at the operation of the present invention configured as described above are as follows.
먼저, 제어부(10)는 시스템에 전원이 인가되면 각 롤러를 구동시키는 제어신호를 송출함과 동시에 각 롤러에 기 설정된 전압을 인가한다.First, when power is applied to the system, the controller 10 transmits a control signal for driving each roller and applies a predetermined voltage to each roller.
즉, -1.4[kV]의 대전전압이 인가된 대전롤러(미도시)의 회전에 의해 표면에 형성된 감광체가 대전되어 표면에 대략 -800[V]의 전위를 띄게 되며, 노광장치(70)에서 방사된 빛에 의해서 형성되는 정전잠상은 대략 0[V]의 전위를 갖는다. 또한, HVPS(40)는 제어부(10)의 제어에 의해 +2.0[㎸]의 전사전압을 전사롤러(30)에 인가한다.That is, the photoconductor formed on the surface is charged by the rotation of a charging roller (not shown) to which a charging voltage of -1.4 [kV] is applied, thereby bringing the potential of approximately -800 [V] to the surface. The electrostatic latent image formed by the emitted light has a potential of approximately 0 [V]. The HVPS 40 also applies a transfer voltage of +2.0 [kW] to the transfer roller 30 under the control of the control unit 10.
이와 같이 각 구성부에 소정의 전압이 인가되면, 전송된 인쇄데이터에 따라 인쇄작업을 수행하게 된다.When a predetermined voltage is applied to each component unit as described above, a print job is performed according to the transmitted print data.
용지카세트에 적재된 인쇄용지는 픽업롤러(미도시)에 의해 픽업되어, 용지 이송경로를 따라 이송된다. 제전가이드(50)는 이송되는 용지가 전사롤러(30)에 공급될 때 최적의 전사효율을 얻을 수 있도록 입사각을 안내한다.The printing paper loaded in the paper cassette is picked up by a pickup roller (not shown) and conveyed along the paper feed path. The antistatic guide 50 guides the angle of incidence so as to obtain an optimum transfer efficiency when the paper to be fed is supplied to the transfer roller 30.
이때, 전사롤러(30)에 형성된 전사전압은 감광드럼(60)을 통해 그라운드로 흐르는데, 제전가이드(50)에 의해서 인쇄용지가 감광드럼(60)과 전사롤러(30)의 사이에 공급되면, 감광드럼(60)의 표면에 도포된 토너가 형성한 가시상이 인쇄용지에 전사된다.At this time, the transfer voltage formed on the transfer roller 30 flows to the ground through the photosensitive drum 60. When the printing paper is supplied between the photosensitive drum 60 and the transfer roller 30 by the antistatic guide 50, The visible image formed by the toner applied to the surface of the photosensitive drum 60 is transferred to the printing paper.
한편, 전사롤러(30)와 감광드럼(60)의 사이에 공급된 인쇄용지의 저항이 낮으면(예컨대, 용지에 습기가 많은 경우) 전사롤러(30)에서 감광드럼(60)을 통해 그라운드로 흐르는 전류는 인쇄용지를 통하여 제전가이드(50)로 흐르게 된다.On the other hand, when the resistance of the printing paper supplied between the transfer roller 30 and the photosensitive drum 60 is low (for example, when the paper is damp), the transfer roller 30 goes to the ground through the photosensitive drum 60. The flowing current flows to the antistatic guide 50 through the printing paper.
제전가이드(50)로 누설된 전류는 그라운드로 흐르기 전에 전류검출부(20)에서 센싱하고, 센싱된 전류값을 제어부(10)에 입력된다.The current leaked into the antistatic guide 50 is sensed by the current detector 20 before flowing to the ground, and the sensed current value is input to the controller 10.
제어부(10)는 전류검출부(20)로부터 전류값이 입력되면, 전류값에 대응하는전압을 전사롤러(30)에 추가로 인가하도록 HVPS(40)를 제어한다.When the current value is input from the current detector 20, the controller 10 controls the HVPS 40 to further apply a voltage corresponding to the current value to the transfer roller 30.
HVPS(40)는 제어부(10)의 제어에 의해 전사롤러(30)에 인가되는 전사전압과 제어부(10)로부터 추가로 입력된 전압을 가산하여, 가산된 전사전압을 전사롤러(30)에 인가한다.The HVPS 40 adds the transfer voltage applied to the transfer roller 30 and the voltage additionally input from the control unit 10 by the control of the controller 10, and applies the added transfer voltage to the transfer roller 30. do.
따라서, 전사롤러(30)에서 감광드럼(60)을 통해 그라운드로 흐르는 전류가 제전가이드(50)로 누설되더라도, 누설된 전류가 보상된 전사전압이 인가되므로 화상의 품질이 떨어지는 것을 방지할 수 있다.Therefore, even if a current flowing to the ground through the photosensitive drum 60 in the transfer roller 30 leaks to the antistatic guide 50, the transfer voltage compensated for the leaked current is applied, thereby preventing the image quality from deteriorating. .
이와 같이, 본 발명의 상세한 설명에서는 구체적인 실시예에 관해 설명하였으나, 본 발명의 범주에서 벗어나지 않는 한도내에서 여러 가지 변형이 가능함은 물론이다. 그러므로, 본 발명의 범위는 설명된 실시예에 국한되어 정해져서는 안되며 후술하는 특허청구범위 뿐만 아니라 이 특허청구범위와 균등한 것들에 의해 정해져야 한다.As described above, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.
이상에서 살펴본 바와 같이, 본 발명에 따른 화상형성장치의 전사전압 보정장치에 의하면 전사롤러에서 감광드럼을 통해 그라운드로 흐르는 전류가 제전가이드로 누설되더라도, 누설된 전류만큼의 전압이 가산된 전사전압이 전사롤러에 인가되므로 전사전압이 부족하여 발생하는 전사불량을 방지할 수 있는 이점이 있다.As described above, according to the transfer voltage correcting apparatus of the image forming apparatus according to the present invention, even if a current flowing through the photosensitive drum to the ground leaks to the antistatic guide, the transfer voltage to which the voltage equal to the leaked current is added Since it is applied to the transfer roller there is an advantage that can prevent the transfer failure caused by the lack of the transfer voltage.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990005538A KR100309986B1 (en) | 1999-02-19 | 1999-02-19 | Apparatus correcting transfer voltage in image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990005538A KR100309986B1 (en) | 1999-02-19 | 1999-02-19 | Apparatus correcting transfer voltage in image forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20000056323A KR20000056323A (en) | 2000-09-15 |
| KR100309986B1 true KR100309986B1 (en) | 2001-11-01 |
Family
ID=19574588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019990005538A KR100309986B1 (en) | 1999-02-19 | 1999-02-19 | Apparatus correcting transfer voltage in image forming device |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100309986B1 (en) |
-
1999
- 1999-02-19 KR KR1019990005538A patent/KR100309986B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR20000056323A (en) | 2000-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8045871B2 (en) | Image forming apparatus and image forming method on measured physical quantity | |
| US5848321A (en) | Method for automatically controlling transfer voltage in printer using electrophotography system | |
| US20040091277A1 (en) | Image forming apparatus | |
| JP5538846B2 (en) | Image forming apparatus | |
| US5652948A (en) | Image forming apparatus | |
| US20200050127A1 (en) | Adjustments to print blanket bias voltage | |
| KR100309986B1 (en) | Apparatus correcting transfer voltage in image forming device | |
| EP1045295B1 (en) | Double-sided printing apparatus | |
| US6697581B2 (en) | Image forming apparatus | |
| CN108255030B (en) | Image forming apparatus and image forming method | |
| JP3740333B2 (en) | Image forming apparatus | |
| JP2019131325A (en) | Image forming device | |
| JPS6114671A (en) | Electrophotographic copying device | |
| KR100419408B1 (en) | Charge voltage controller of image formation apparatus | |
| KR100291425B1 (en) | Apparatus of a electrophotography develope function and method for controlling transcription voltage; fixation temperature using the same | |
| US7062180B2 (en) | Image forming device with image density control | |
| KR20100043774A (en) | Fusing unit, image forming apparatus and control method for the same | |
| KR950014875B1 (en) | Exposure timing control method | |
| JP2022133606A (en) | Image forming apparatus, control program, and control method | |
| US20060239717A1 (en) | Image forming device and image forming method of preventing printing according to a skew of a paper | |
| KR100334112B1 (en) | Method for controlling charge voltage of image forming device | |
| JP2023057240A (en) | image forming device | |
| KR100485861B1 (en) | Apparatus for controlling intensity of radiation of pretransfer lamp, and controlling method thereof | |
| JP2023064411A (en) | Image forming apparatus | |
| JP2022113303A (en) | Image forming apparatus, control program, and control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20060830 Year of fee payment: 6 |
|
| LAPS | Lapse due to unpaid annual fee |