KR940001006Y1 - Automatic developing bias voltage control system in electronic appliances - Google Patents
Automatic developing bias voltage control system in electronic appliances Download PDFInfo
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- KR940001006Y1 KR940001006Y1 KR2019880007779U KR880007779U KR940001006Y1 KR 940001006 Y1 KR940001006 Y1 KR 940001006Y1 KR 2019880007779 U KR2019880007779 U KR 2019880007779U KR 880007779 U KR880007779 U KR 880007779U KR 940001006 Y1 KR940001006 Y1 KR 940001006Y1
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- image potential
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- photosensitive member
- image
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- 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
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
- G03G15/0907—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush with bias voltage
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- 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
- G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
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- 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
- G03G15/80—Details relating to power supplies, circuits boards, electrical connections
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- General Physics & Mathematics (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래의 시스템 장치도.1 is a conventional system arrangement.
제2도는 종래의 감광체 표면 전위의 노광 직전과 노광직후의 상태도.2 is a state diagram immediately before and immediately after exposure of a conventional photoreceptor surface potential.
제3도는 종래의 토너 이동 에카니즘 상태도.3 is a state diagram of a conventional toner transfer mechanism.
제4도는 종래의 감광체에 있어 열화에 의해 생기는 전기 특성 변화도.4 is a change diagram of electrical characteristics caused by deterioration in a conventional photoconductor.
제5도는 본 고안에 따른 현상바이어스 전압 자동 조정 시스템 장치도.5 is a development bias voltage automatic regulation system according to the present invention.
제6도는 본 고안에 따른 요부 상세 회로도.6 is a detailed circuit diagram of the main part according to the present invention.
제7도는 본 고안의 동작 플로우 챠트도.7 is an operation flowchart of the present invention.
제8도는 본 고안에 따른 프로우브의 종적인 위치와 표시전위 상태도.8 is a longitudinal position and indication potential state of the probe according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
Ls : 광원 5 : 감광체Ls: light source 5: photosensitive member
6 : 현상슬리브 7 : 표면전압 측정용 프로우브6: developing sleeve 7: probe for surface voltage measurement
8 : 화상전위 측정용 프로우브 9 : 화상전위 측정회로8: Image potential measurement probe 9: Image potential measurement circuit
10 : 화상전위 및 비화상 전위 비교회로 11 : 바이어스 세팅회로10: image potential and non-image potential comparison circuit 11: bias setting circuit
12 : 비화상 전위 측정 프로우브 13 : 비화상 전위 측정회로12: non-image potential measurement probe 13: non-image potential measurement circuit
14 : 현상전압 조정회로14: developing voltage adjusting circuit
본 고안은 전자사진 응용기기의 현상 바이어스 전압 자동 조정시스템에 관한 것으로, 특히 복사기나 레이저 빔 프린터 등의 기기에서 현상기의 바이어스 전압을 조절하여 감광체의 특성변화를 보상하도록 하는데 적당하도록한 제어 시스템회로에 관한 것이다.The present invention relates to an automatic adjustment system of developing bias voltage of an electrophotographic application device. In particular, the present invention relates to a control system circuit suitable for compensating for characteristics change of a photosensitive member by adjusting a bias voltage of a developing device in a device such as a copying machine or a laser beam printer. It is about.
종래의 현상 전압인가 장치는 제1도에서 보는 바와같이, 광원(Ls)이 감광체(5)에 조사되고 감광체(5)의 일측에는 대전코로나(1)와 소거램프(2) 및 크리닝 브레이드(Cleaning Blade) (3) 그리고 전사 코로나(4)를 각각 설치하며 감광체(5)의 타일측에는 일정 DC전압(Vb)이 인가되는 현상슬리브(6)를 설치한 구성으로, 바이어스의 기본 목적은 전자사진 처리에서 전압차이로 생긴 화상을 가시상으로 바꾸기 위한 토너(Toner)의 이동을 돕는데 있다.In the conventional developing voltage application device, as shown in FIG. 1, the light source Ls is irradiated to the photoconductor 5, and one side of the photoconductor 5 has a charging corona 1, an erasing lamp 2, and a cleaning braid. Blade) 3 and transfer corona 4, respectively, and a developing sleeve 6 to which a constant DC voltage Vb is applied on the tile side of the photoconductor 5, and the basic purpose of the bias is electrophotographic processing. This is to assist the movement of the toner to convert the image resulting from the voltage difference into the visible image.
제2도는 노광직전과 직후의 감광체(5) 표면전위 상태를 나타내는데 설명을 간단히 하기 위하여대전에충전된 토너를 사용할 경우의 전자사진 처리를 생각해 보자.2 shows the state of the surface potential of the photosensitive member 5 immediately before and after exposure. In Daejeon Consider electrophotographic processing when using a filled toner.
제2도의 (a)는 대전 직후의 그림으로 감광체(5)가 화살표방향(→)으로 회전하여 대전코로나(1) 밑을 지나가게 되면 대전코로나(1)에서 나온 전하에 의하여 감광체(5)가 -500[V]정도로 충전되고, 감광체(5)가 계속 회전하여 광원(Ls) 밑을 지나게 되면 광원(Ls)에서 나온 광자(photon)에 의해 중화가 되어 표면 전위가 -80[V] 정도로 떨어진다.(A) of FIG. 2 is a picture immediately after the charging. When the photosensitive member 5 rotates in the direction of the arrow (→) and passes under the charging corona 1, the photosensitive member 5 is discharged by the charge from the charging corona 1. When charged to about -500 [V], and the photoreceptor 5 continues to rotate and passes under the light source Ls, it is neutralized by the photon emitted from the light source Ls, and the surface potential drops to about -80 [V]. .
이 전압을 잔류전위라고 한다.This voltage is called the residual potential.
바이어스 전압은 대전전위와 잔류전위 사이의 값을 가지게 되며 현상하고자 하는 화상농도에 따라 잔류전류쪽으로 혹은 대전 전류쪽으로 접근하고, 바이어스에 의하여 토너가 감광체(5)상에 옮겨가는 메카니즘은 제3도에서 보는 바와같이, 편의상 감광체(5)와 현상 슬리브(6)를 평판으로 생각하여 현상슬리브(6)쪽은 임의로 -250[V}의 전압이 걸려있고 감광체(5) 쪽은 대전전위와 잔류 전류가 있다고하면로 표시된 토너 입자는 상대적으로 전압이 낮은 -80[V]의 잔류 전위쪽으로 가게 되므로 토너가 감광체(5)에 달라 붙게 된다.The bias voltage has a value between the charging potential and the residual potential, and approaches the residual current or the charging current according to the image density to be developed, and the mechanism by which the toner is transferred on the photoreceptor 5 by the bias is shown in FIG. As shown, for convenience, the photosensitive member 5 and the developing sleeve 6 are regarded as flat plates, so that the developing sleeve 6 has a voltage of -250 [V], and the photosensitive member 5 has a charge potential and a residual current. If yes The toner particles denoted by go to the residual potential of the relatively low voltage of -80 [V], so that the toner sticks to the photosensitive member 5.
이상과 같은 고정 바이어스를 이용한 종래의 기술에 있어서의 문제점은 감광체가 열화되거나 현상조건이 변할 경우에 현저하게 나타나는데, 제4도에 도시된 감광체의 열화에 의하여 생기는 전기적 특성 변화에서 보는 바와같이 시간이 흘러서 프린터 횟수가 많아질수록 감광체의 잔류 전위는 높아지고 대전전위는 낮아지게 되므로 감광체의 수명이 짧아지고 화상의 질이 저하되는 문제점이 있었다.The problem in the related art using the fixed bias as described above is remarkable when the photoconductor deteriorates or when the developing conditions change. As shown in FIG. 4, the change in electrical characteristics caused by the deterioration of the photoconductor is shown. As the number of printers increases, the residual potential of the photoconductor is increased and the charge potential is lowered. Therefore, the life of the photoconductor is shortened and the image quality is deteriorated.
이에 따라 본고안은 상기한 문제점을 개선하기 위해 안충된 것으로써, 간단한 기술구성으로 감광체의 표면전위를 측정하고 이로부터 현상기 전압을 조절하여 감광체의 잔류전위 및 대전전위의 변화에 대응하도록 하므로써 감광체의 특성, 변화를 보상하도록 한것으로, 이하 그의 기술 구성을 첨부된 도면에 따라 설명하면 다음과 같다.Accordingly, the present proposal has been devised to improve the above problems, and by measuring the surface potential of the photoconductor with a simple technical configuration and adjusting the developer voltage therefrom, it is possible to cope with the change in the residual potential and the charge potential of the photoconductor. In order to compensate for the characteristics and changes, the following describes its technical configuration according to the accompanying drawings.
제5도는 본 고안에 따른 전자사진의 응용기기의 현상 바이어스 전압 자동 조정 시스템 장치를 나타낸 것으로 그의 구성을 살펴보면, 광원(Ls)이 감광체(5)에 조사되고 감광체(5)의 일측에는 대전코로나(1)와 소거램프(2) 및 크리닝 브레이드(3) 그리고 전사코로나(4)를 각각 설치하며 감광체(5)의 타일측에는 현상슬리브(6)를 설치한 기존의 제1도 장치에 있어서, 상기 감광체(5)의 표면에 표면전압 측정용 프로우브(7)를 설치하고, 한편 화상 전위 측정용 프로우브(8)가 화상전위 측정 회로(9)를 거쳐 화상 전위 및 비화상 전위 비교회로(10)의 일측에 연결되며 상기 화상 전위 및 비화상전위 비교회로(10)의 타일측은 바이어스 세팅회로(11)와, 비화상 전위 측정 프로우브(12)와 연결된 비화상 전위 측정회로(13)에 각각 연결되어 그의 출력이 현상 전압 조정회로(14)를 거쳐 현상슬리브(6)의 일측에 연결되는 구성으로, 상기 회로의 상세 구성은 제6도에 나타내었다.FIG. 5 shows an apparatus for automatically adjusting bias voltage of an electrophotographic application apparatus according to the present invention. Looking at the configuration thereof, a light source Ls is irradiated to the photosensitive member 5 and a charge corona (1) on one side of the photosensitive member 5 is shown. 1), an erasing lamp (2), a cleaning braid (3) and a transfer corona (4), respectively, and a developing sleeve (6) on the tile side of the photosensitive member (5). The surface voltage measuring probe 7 is provided on the surface of (5), while the image potential measuring probe 8 passes through the image potential measuring circuit 9 and the image potential and non-image potential comparing circuit 10 is provided. The tile side of the image potential and non-image potential comparison circuit 10 is connected to a bias setting circuit 11 and a non-image potential measurement circuit 13 connected to the non-image potential measurement probe 12, respectively. And the output thereof causes the developing voltage adjusting circuit 14 to A structure coupled to one side of the hit the developing sleeve 6, a detailed construction of the circuit is shown in Figure 6.
상기 구성의 동작 상태 및 작용효과를 첨부된 도면에 따라 설명하면 다음과 같다.Referring to the accompanying drawings, the operation state and the effect of the configuration as follows.
본고안의 동작은 제5도와 제6도에서 보는 바와 같이 감광체(5)의 표면전위를 2개의 프로우브(Probe)로 측정하는데, 하나는 화상 전위 측정용 프로우브(8)이고 다른 하나는 비화상 전위 측정용 프로우브(12)이다.The operation of this paper measures the surface potential of the photoconductor 5 with two probes as shown in FIGS. 5 and 6, one of which is an image potential measuring probe 8 and the other of a non-image Probe 12 for electric potential measurement.
상기 감광체(5)내의 화상부와 비화상부는 항상 일정한 곳에 위치할 수 없으나, 본 고안에서는 이를 위하여 감광체(5)의 일측에는 광원(Ls)이 항상 조사되도록 하므로써 화상부를 만들고 타일측에는 광원(Ls)이 지나가지 못하도록 하여 항상 대전 전압을 유지하도록 한다.The image part and the non-image part in the photoreceptor 5 cannot always be positioned at a constant place. However, in the present invention, the image part is made by irradiating a light source Ls to one side of the photoreceptor 5 and the light source Ls to the tile side. Do not allow this to pass and always maintain the charging voltage.
이 측정 부위는 실제 화상의 인쇄에는 영향이 없는 감광체(5)의 양단으로 선정한다.This measurement site | part is selected by the both ends of the photosensitive member 5 which does not affect the printing of an actual image.
상기 프로우브의 종적인 위치와 그때의 감광체 표면 전위는 제7도에서 나타내었고, 본 고안의 동작 순서 제7도의 플로우 챠트에서와 같이 두개의 화상 전위 측정용 프로우브(8)와 비화상 전위 측정용 프로우브(12)에서 나온 각각의 화상 전위 측정값을 화상 전위 측정회로(9)와 비화상 전위 측정회로(13)에서 일정 전압으로 바꾼후, 화상 전위 및 비화상 전위 비교회로(10)에서 비교측정 한다.The vertical position of the probe and the photoreceptor surface potential at that time are shown in FIG. 7, and the two image potential measuring probes 8 and non-image potential measurement are performed as in the flowchart of FIG. 7. Each image potential measurement value from the dragon probe 12 is changed to a constant voltage in the image potential measurement circuit 9 and the non-image potential measurement circuit 13, and then in the image potential and non-image potential comparison circuit 10 Compare and measure
상기 화상 전위 및 비화상 전위 비교회로(10)에서 비교 측정된 값은 바이어스 세팅회로(11)를 통해 세팅된 값과 비교하여 오차 범위내에 오면 측정 사이클을 다시 시작하고, 오차범위에 오지않을 경우에는 현상 전압 조정회로(14)에서 현상 바이어스 값을 증가 혹은 감소시켜서 다시 측정하도록 한다.When the measured value compared with the image potential and non-image potential comparing circuit 10 is within the error range compared with the value set through the bias setting circuit 11, the measurement cycle is restarted, and if it is not within the error range, In the developing voltage adjusting circuit 14, the developing bias value is increased or decreased to measure again.
따라서 본 고안에 따른 전자사진 응용기기의 현상 바이어스 전압 자동조정 시스템은 이상의 설명에서와 같이, 감광체의 특성 변화를 현상기의 바이어스 전압 조절로 보상하도록 하여 감광체의 대전 전위 및 잔류전위가 프린트 횟수, 온도 및 습도에 따라 변화되는 것을 방지 하므로써 기기의 수명을 연장시키고 우수한 성능을 갖도록하는 효과를 갖게 된다.Therefore, the development bias voltage automatic adjustment system of the electrophotographic application device according to the present invention compensates the change in the characteristics of the photoconductor by adjusting the bias voltage of the photoconductor as described above, so that the charging potential and the residual potential of the photoconductor are printed, the temperature and By preventing the humidity from changing, it has the effect of extending the life of the device and having excellent performance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880007779U KR940001006Y1 (en) | 1988-05-27 | 1988-05-27 | Automatic developing bias voltage control system in electronic appliances |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880007779U KR940001006Y1 (en) | 1988-05-27 | 1988-05-27 | Automatic developing bias voltage control system in electronic appliances |
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| KR890023468U KR890023468U (en) | 1989-12-02 |
| KR940001006Y1 true KR940001006Y1 (en) | 1994-02-25 |
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| KR2019880007779U KR940001006Y1 (en) | 1988-05-27 | 1988-05-27 | Automatic developing bias voltage control system in electronic appliances |
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| KR100467599B1 (en) * | 2002-07-24 | 2005-01-24 | 삼성전자주식회사 | Image forming apparatus comprising measurement device of surface voltage and Controling method of development voltage utilizing the same |
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- 1988-05-27 KR KR2019880007779U patent/KR940001006Y1/en not_active IP Right Cessation
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