CN101226349A - Developing method for printing apparatus - Google Patents
Developing method for printing apparatus Download PDFInfo
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- CN101226349A CN101226349A CNA2007100073089A CN200710007308A CN101226349A CN 101226349 A CN101226349 A CN 101226349A CN A2007100073089 A CNA2007100073089 A CN A2007100073089A CN 200710007308 A CN200710007308 A CN 200710007308A CN 101226349 A CN101226349 A CN 101226349A
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- sensitive cell
- photo
- image
- charging
- carbon dust
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Abstract
A develop method comprises charging a light sensitive component via a charger to provide a surface potential on the light sensitive component, developing the light sensitive component via an exposure device to form a latent image on the light sensitive component, developing the latent image via a develop component and holding the surface potential on the light sensitive component when the charger charges the light sensitive component agent to expose and develop again.
Description
Technical field
The invention relates to the developing method in a kind of printing equipment, and particularly relevant for a kind of developing method that improves the print quality of printing equipment.
Background technology
Photoelectronic imaging formula printing equipment is that (ElectroPhotoGraphy, EPG) mode is carried out the printing of image by photoelectronic imaging.Photoelectronic imaging has several steps usually, comprises charging (charging), exposure (exposure), development (developing), image rotation (transferring) and fixation steps such as (fusing).
When printing equipment is desired to carry out the printing of image, at first utilize a high-voltage corona charging device (charger) on the surface of a photo-sensitive cell (photoconductor), to be covered with negative charge, this is charge step.Yet, generally in the printing equipment of Polaroid (one pass), can use a plurality of charging devices to finish the charge step of same image unit (as a type face) image, this kind configuration can cause the volume of printing equipment to become big, spent cost of manufacture increases, and the ozone amount that this external cause charging process is produced also can increase thereupon.
The known practice of improving is to utilize repeatedly imaging mode (multi-pass), four imagings (four pass) mode for example, and the step of only utilizing single charging device to charge, photo-sensitive cell is carried out repeatedly charging by this single charging device when the image printing, not only can reach the purpose of charging equally, and volume and the cost of manufacture that can save printing equipment, also reduce the generation of ozone amount simultaneously.Yet this practice but makes on the surface of photo-sensitive cell, can need be through repeatedly charging because form same image unit, and cause the uneven problem of charging.Please refer to Fig. 1, Fig. 1 is the synoptic diagram of the afterpotential difference of once charging and repeatedly charge on the photosensitive member surface.Wherein, Δ V promptly is the potential difference (PD) that produces because of the inequality of charging.Thus, because the current potential on the photosensitive member surface can't be kept necessarily, the related image quality that makes printing equipment be printed after carrying out developing process also can't be kept necessarily.
Please refer to United States Patent (USP) 7,092, No. 650 described, and its solution is that surface potential inductor (sensor) is set between exposure device and developing element, with the current potential on the induction photosensitive member surface.Then, again the signal that senses is sent to control element, the voltage output with the control charging device is maintained necessarily the current potential on the photosensitive member surface.Yet, come current potential on the sensing photosensitive member surface by the mode that inductor is set after, adjust the voltage output of charging device, the inductor that this kind mode must high precision can be finished, and certainly will will cause cost of manufacture to increase thus.
Therefore, be necessary to propose a kind of method, image shows uneven problem in the print procedure to improve.
Summary of the invention
The purpose of this invention is to provide a kind of developing method, keep necessarily by removing unnecessary electric charge makes that printing equipment is printed after carrying out developing process image quality.
According to one embodiment of the invention, the method comprises by a charging device carries out the charging first time on a photo-sensitive cell, make to have a first surface current potential on the photo-sensitive cell; By an exposure device photo-sensitive cell is exposed, on photo-sensitive cell, form a sub-image; By a developing element sub-image on the photo-sensitive cell is developed and to form a carbon dust image; By charging device the photo-sensitive cell with carbon dust image is carried out the charging second time, make to have a second surface current potential on the photo-sensitive cell; And by a neutralizer the unnecessary electric charge on the photo-sensitive cell is removed, so that the second surface current potential of charging is identical with the first surface current potential that charges for the first time for the second time.
Another object of the present invention is that a kind of developing method is being provided, and utilizes different voltages to develop, and makes the image quality that printing equipment is printed after carrying out developing process keep necessarily.
According to another embodiment of the present invention, the method comprises by a charging device carries out the charging first time on a photo-sensitive cell, make to have a first surface current potential on the photo-sensitive cell; By an exposure device photo-sensitive cell is exposed, on photo-sensitive cell, form one first sub-image; Import one first voltage to one developing element in order to first sub-image on the photo-sensitive cell is developed and form one first carbon dust image; By charging device the photo-sensitive cell with first carbon dust image is carried out the charging second time, have a second surface current potential on the photo-sensitive cell and make; By exposure device photo-sensitive cell is exposed, on photo-sensitive cell, form one second sub-image; And one second voltage that input is different from first voltage is to developing element, developing element is developed to second sub-image of photo-sensitive cell and forms one second carbon dust image.
Description of drawings
For above-mentioned and other purposes of the present invention, feature, advantage and embodiment can be become apparent, being described in detail as follows of accompanying drawing.
Fig. 1 is the synoptic diagram of the afterpotential difference of once charging and repeatedly charge on the photosensitive member surface.
Fig. 2 is the synoptic diagram of the printing equipment of one embodiment of the present of invention.
Fig. 3 is the synoptic diagram of the printing equipment of another embodiment of the present invention.
Fig. 4 is according to the synoptic diagram of the once charging on the photosensitive member surface of the embodiment of the invention with the afterpotential difference of repeatedly charging.
Main element symbol description in the accompanying drawing is as follows.
200,300: printing equipment
210: photo-sensitive cell
220: rotation roller group 250a, 250b: developing element
230: charging device 260: sub-image
240: exposure device 310: neutralizer
Embodiment
Fig. 2 is the synoptic diagram of the printing equipment of one embodiment of the present of invention.This printing equipment 200 has a photo-sensitive cell 210, a rotation roller group 220, a charging device 230, an exposure device 240, and two developing element 250a and 250b.Photo-sensitive cell 210 covers are fixed on the rotation roller group 220, and according to the rotation circularly by rotation roller group 220 of direction shown in the arrow.Wherein, photo-sensitive cell 210 can be a sensitization band or a photosensitive drums, and charging device 230 can be a charger unit (corotron) or a network control charger unit (scorotron).In addition, exposure device also can be a laser (Laser) device or a light-emittingdiode (LED) device, and the quantity of developing element can dispose on demand, as disposes four.
According to one embodiment of present invention, when printing equipment is desired to carry out the printing of image, at first import one first voltage to charging device 230, make it on the surface of photo-sensitive cell 210, carry out first time charging, make to be covered with even electric charge on the photo-sensitive cell 210 and to have a first surface current potential.
Then, to wait to print image data again and convert a smooth signal to by exposure device 240, the light signal is shone on the photo-sensitive cell 210 of even electric charge to carry out step of exposure, and irradiation can produce potential difference with illuminated portion not, wherein has higher current potential through the exposure area of irradiation with respect to unexposed area.Like this, just, can form a sub-image (Latent image) 260 of expressing image position with potential difference.
When after forming the required sub-image 260 of printing on the photo-sensitive cell 210, import one first voltage to developing element 250a, the carbon dust on the developing element 250a can be adsorbed to the higher sub-image zone of current potential because of electrostatic attraction at this moment.Like this, just can make the absorption of sub-image zone print required carbon dust, and form one first carbon dust image.Then, the photo-sensitive cell 210 that has the first carbon dust image by 230 pairs of charging devices carries out the charging second time, can have a second surface current potential that is different from original surface potential because of recharge and photo-sensitive cell 210 surfaces are gone up.Then, expose by 240 pairs of photo-sensitive cells 210 of exposure device, 210 form one second sub-image on photo-sensitive cell again.At this moment, input is different from one second voltage of first voltage to developing element 250b, make the carbon dust that has another different potentials on the developing element 250b, and allow the carbon dust of sub-image zone absorption corresponding to second surface current potential required different potentials when printing, forming one second carbon dust image, and guarantee the image quality unanimity printed.That is to say, utilize the high voltage control mode, adjust the output voltage of developing element power supply.
In one embodiment, in the imaging first time (1
StPass) adjust the first lower voltage of developing element output numerical value the time, and in the imaging second time (2
NdPass) the second higher voltage of output numerical value the time.For example developing (1 for the first time
StPass) first voltage the time is-700V, and second development (2
NdPass) second voltage the time is-800V.In another embodiment, if printing equipment is to develop in the mode of four imagings (four pass), then for the second time, the voltage value with the 4th output is the numerical value that is higher than first voltage for the third time.For example developing (1 for the first time
StPass) first voltage the time is-700V, and the second time (2
NdPass), for the third time (3
RdPass) and the 4th time (4
ThOutput voltage when pass) developing is-800V.
Fig. 3 is the synoptic diagram of the printing equipment of another embodiment of the present invention.Wherein, Fig. 3 printing equipment is set up a neutralizer (Eraser) 310 compared to the 2nd figure printing equipment more, and in order to remove the unnecessary electric charge on the photo-sensitive cell 210, wherein 310 of photo-sensitive cell 210 and neutralizers have a gap.According to embodiments of the invention, when printing equipment is desired to carry out the printing of image, on photo-sensitive cell 210, carry out first time charging by charging device 230, make to be covered with even electric charge on the photo-sensitive cell 210 and to have a first surface current potential.
Then, to wait to print image data and convert a smooth signal to by exposure device 240, the light signal is shone on the photo-sensitive cell 210 of even electric charge to carry out step of exposure, and irradiation can produce potential difference with illuminated portion not, wherein has higher current potential through the exposure area of irradiation with respect to unexposed area.Like this, just, can form the sub-image 260 of expressing image position with potential difference.
When after forming the required sub-image 260 of printing on the photo-sensitive cell 210, the carbon dust on the developing element 250a can be adsorbed to the higher exposure area of current potential because of electrostatic attraction.Like this, just can make exposure area absorption print required carbon dust, and form a carbon dust image.
Then, after photo-sensitive cell 210 that 230 pairs of charging devices have a carbon dust image carries out the charging second time, make to have a second surface current potential on the photo-sensitive cell 210.Then, the unnecessary electric charge on the photo-sensitive cell is removed, make that the second surface current potential of charging for the second time is identical with the first surface current potential of charging for the first time by neutralizer 310.Wherein, neutralizer 310 can move before exposure device 240, before the exposure electric charge on the photo-sensitive cell 210 is removed for the second time at 240 pairs of photo-sensitive cells of exposure device 210, and also can be in exposure device 240 back actions, after the exposure electric charge on the photo-sensitive cell 210 is removed for the second time at 240 pairs of photo-sensitive cells of exposure device 210, all keep stable surface potential on the photo-sensitive cell 210 so that make.
Please refer to Fig. 4, Fig. 4 is according to the synoptic diagram of the once charging on the photosensitive member surface of the embodiment of the invention with the afterpotential difference of repeatedly charging.Can clearly find in the drawings, utilize the method for the invention, can solve the problem that originally produces potential difference (PD) Δ V because of the inequality of charging.Thus, owing to all keep stable surface potential on the photo-sensitive cell, therefore can guarantee the image quality unanimity that is printed through the back of developing each time.
By the embodiment of the invention described above as can be known, use the image data uniform quality that this kind developing method can make printing equipment print, and owing to be to use single charging device to charge, therefore volume and the cost of manufacture that also can save printing equipment more can reduce the ozone amount that produces because of charging process.
Though the present invention discloses as above with embodiment; yet these embodiment are used for limiting the present invention; the technical field technician without departing from the spirit and scope of the present invention under any; various modifications may be made and change, so protection scope of the present invention defines with claims and is as the criterion.
Claims (10)
1. the developing method in the printing equipment comprises:
On a photo-sensitive cell, carry out the charging first time by a charging device, make to have a first surface current potential on this photo-sensitive cell;
By an exposure device described photo-sensitive cell is exposed, on this photo-sensitive cell, form a sub-image;
By a developing apparatus developing element the described sub-image on the described photo-sensitive cell is developed and to form a carbon dust image;
By described charging device the described photo-sensitive cell with described carbon dust image is carried out the charging second time, make to have a second surface current potential on the described photo-sensitive cell; And
The unnecessary electric charge that will have by neutralizer on the described photo-sensitive cell of described carbon dust image removes, so that the described second surface current potential of the described second time of charging is identical with the described first surface current potential that charges the described first time.
2. developing method as claimed in claim 1 is characterized in that, described neutralizer carries out described photo-sensitive cell before the exposure the unnecessary electric charge on the described photo-sensitive cell being removed for the second time at described exposure device.
3. developing method as claimed in claim 1 is characterized in that, described neutralizer carries out described photo-sensitive cell after the exposure the unnecessary electric charge on the described photo-sensitive cell being removed for the second time at described exposure device.
4. the developing method in the printing equipment comprises:
On a photo-sensitive cell, carry out the charging first time by a charging device, make to have a first surface current potential on this photo-sensitive cell;
By an exposure device described photo-sensitive cell is exposed, on described photo-sensitive cell, form one first sub-image;
Import one first voltage to one developing element in order to described first sub-image on the described photo-sensitive cell is developed and form one first carbon dust image;
By described charging device the described photo-sensitive cell with described first carbon dust image is carried out the charging second time, have a second surface current potential on the described photo-sensitive cell and make;
By described exposure device described photo-sensitive cell is exposed, on described photo-sensitive cell, form one second sub-image; And
One second voltage that input is different from described first voltage is to described developing element, described developing element is developed to described second sub-image of described photo-sensitive cell and forms one second carbon dust image.
5. developing method as claimed in claim 4 is characterized in that the numerical value of described second voltage is higher than the numerical value of described first voltage.
6. developing method as claimed in claim 4 is characterized in that, the numerical difference between distance of described second voltage and described first voltage is greater than 20V.
7. photoelectronic imaging printing equipment comprises:
One photo-sensitive cell;
One charging device in order to described photo-sensitive cell is charged, makes described photo-sensitive cell have a surface potential;
At least one exposure device is in order to expose to described photo-sensitive cell to form a sub-image; And
A plurality of developing elements, in order to the projection carbon dust to described sub-image zone, forming a carbon dust image,
Wherein said a plurality of developing element passes through the different magnitude of voltage of input, and makes this developing element have the carbon dust of different potentials.
8. photoelectronic imaging printing equipment as claimed in claim 7 is characterized in that, one first voltage value of described developing element input is lower than one second voltage value 20V at least.
9. photoelectronic imaging printing equipment comprises:
One photo-sensitive cell;
One charging device in order to described photo-sensitive cell is charged, makes to have a surface potential on this photo-sensitive cell;
At least one exposure device is in order to expose to described photo-sensitive cell to form a sub-image;
A plurality of developing elements are in order to throw carbon dust to described sub-image zone, to form a carbon dust image; And
One neutralizer, after described charging device charges once more to the described photo-sensitive cell with described carbon dust image, in order to the unnecessary electric charge on the described photo-sensitive cell is removed, make to have the described surface potential that is same as the described charging first time on the described photo-sensitive cell.
10. photoelectronic imaging printing equipment as claimed in claim 9 is characterized in that, described neutralizer started before or after described exposure device exposes once more to described photo-sensitive cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710007308A CN101226349B (en) | 2007-01-19 | 2007-01-19 | Developing method for printing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710007308A CN101226349B (en) | 2007-01-19 | 2007-01-19 | Developing method for printing apparatus |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010157079A Division CN101859089A (en) | 2007-01-19 | 2007-01-19 | Developing method in printing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101226349A true CN101226349A (en) | 2008-07-23 |
| CN101226349B CN101226349B (en) | 2010-05-26 |
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ID=39858412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710007308A Expired - Fee Related CN101226349B (en) | 2007-01-19 | 2007-01-19 | Developing method for printing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101226349B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108292117A (en) * | 2016-01-14 | 2018-07-17 | 惠普深蓝有限责任公司 | Charge member in electrophotographic printer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5363178A (en) * | 1989-04-11 | 1994-11-08 | Canon Kabushiki Kaisha | Image forming apparatus |
| US5606399A (en) * | 1994-09-28 | 1997-02-25 | Ricoh Company, Ltd. | Device for correcting an applied voltage in an image forming apparatus |
| US6047155A (en) * | 1999-08-13 | 2000-04-04 | Xerox Corporation | Color printing machine having AC pretransfer toner treatment |
-
2007
- 2007-01-19 CN CN200710007308A patent/CN101226349B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108292117A (en) * | 2016-01-14 | 2018-07-17 | 惠普深蓝有限责任公司 | Charge member in electrophotographic printer |
| US10788770B2 (en) | 2016-01-14 | 2020-09-29 | Hp Indigo B.V. | Charging elements in electrophotographic printers |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101226349B (en) | 2010-05-26 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: AETAS PERIPHERAL CORP. Free format text: FORMER NAME: AETAS TECHNOLOGY INCORPORATED |
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| CP01 | Change in the name or title of a patent holder |
Address after: 92619-3398 Alvin post box 53398, California, USA Patentee after: Aetas Peripheral Corp. Address before: 92619-3398 Alvin post box 53398, California, USA Patentee before: AETAS TECHNOLOGY INCORPORATED |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20080723 Assignee: Technology (Zhenjiang) Co., Ltd. Assignor: Aetas Peripheral Corp. Contract record no.: 2012990000507 Denomination of invention: Developing method in printing device Granted publication date: 20100526 License type: Common License Record date: 20120717 |
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Denomination of invention: Developing method in printing device Effective date of registration: 20120717 Granted publication date: 20100526 Pledgee: Zhenjiang New Area Economic Development Corporation Pledgor: Aetas Peripheral Corp. Registration number: 2012990000381 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20150119 |
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| EXPY | Termination of patent right or utility model |