CN1495561A - Laser scanning unit and electronic photographic imaging device using the same - Google Patents
Laser scanning unit and electronic photographic imaging device using the same Download PDFInfo
- Publication number
- CN1495561A CN1495561A CNA031581854A CN03158185A CN1495561A CN 1495561 A CN1495561 A CN 1495561A CN A031581854 A CNA031581854 A CN A031581854A CN 03158185 A CN03158185 A CN 03158185A CN 1495561 A CN1495561 A CN 1495561A
- Authority
- CN
- China
- Prior art keywords
- light
- scanning direction
- lens
- sub scanning
- rotatable mirror
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003384 imaging method Methods 0.000 title claims description 54
- 108091008695 photoreceptors Proteins 0.000 claims description 20
- 239000000178 monomer Substances 0.000 claims description 17
- 238000010023 transfer printing Methods 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 9
- 125000004122 cyclic group Chemical group 0.000 claims 1
- 230000003287 optical effect Effects 0.000 description 8
- 239000003086 colorant Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000005421 electrostatic potential Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004447 accommodation reflex Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
Images
Abstract
A laser scanning unit and an electrophotographic image forming apparatus adopting the same include a plurality of photogenerators emitting parallel lights, a plurality of rotatable polygonal mirrors which deflect the lights emitted from the photogenerators in a main scanning direction having a range of a predetermined angle to scan the lights onto photosensitive media proceeding in a sub scanning direction, the rotatable polygonal mirrors stacked on a driving unit to match corresponding ones of the photogenerators and coupled with a rotation shaft of the driving unit to rotate therewith, a plurality of first lenses which are installed in light paths between the photogenerators and the rotatable polygonal mirrors, respectively, and collect the lights in the sub scanning direction, and a plurality of second lenses which collect the lights deflected by the rotatable polygonal mirrors on corresponding ones of the photosensitive media.
Description
Technical field
The present invention relates to a kind of laser scan unit and adopt the electrophotographic imaging forming apparatus of this laser scan unit; More particularly, relate to a kind of laser scan unit with a plurality of rotatable mirror polygons that order about by a driver element, and the electrophotographic imaging forming apparatus that adopts this laser scan unit.
Background technology
Fig. 1 is the cut-open view of traditional color electrophotographic image forming apparatus.As shown in Figure 1, be provided with charging device 15, a plurality of laser scan unit 30, a plurality of developing cell 17, transfer roll 21 and photographic fixing hot-rolling (fusing roller) 22 round photoreceptor lamellar (web) 14, this photoreceptor lamellar 14 is by three rollers 11,12 and 13 supportings, along ring-type (sealing) path circular flow.
In the said structure, if the photoscanning of sending from laser scan unit 30 is to photoreceptor lamellar 14, the photoreceptor lamellar charges to predetermined electrostatic potential equably by charging device 15, electrostatic latent image corresponding to picture information is formed by the relative electrostatic potential difference between first and the second portion, wherein in first, the light that laser scan unit 30 sends is scanned, and in second portion, the light that laser scan unit 30 sends is not scanned.Then, toner is applied to electrostatic latent image from developing cell 17 and forms toner image.Be formed on following the finishing of printing of the toner image on the photoreceptor lamellar 14: with toner image be transferred to the transfer roll 21 that rotates when photoreceptor conveying belt 14 contacts on; Then toner image is transferred on one page printer paper S from transfer roll 21, this printer paper S inserts transfer roll 21 and printer paper S is pressed against between the photographic fixing hot-rolling 22 on the transfer roll 21, and like this, by heat and pressure, toner image is to printer paper S.
Fig. 2 is a skeleton view, is illustrated in the example of laser scan unit used in traditional color electrophotographic image forming apparatus shown in Figure 1.As illustrated in fig. 1 and 2, each laser scan unit 30 comprises photo-generator (photogenerator) 31, rotatable mirror polygon 32, lens unit 33 and motor 36.Rotatable mirror polygon 32 is provided with a plurality of reflecting surfaces, and with the rotating shaft coupling of the motor 36 that rotatable mirror polygon 32 is rotated.Send and be incident to from photo-generator 31 on the reflecting surface of rotatable mirror polygon 32 light because of the rotation of rotatable mirror polygon 32 at main scanning direction M upper deflecting, the light of deflection incides on the photoreceptor lamellar 14 through lens unit 33.
In order to form coloured image, need four laser scan units 30, will be scanned up to respectively on the photoreceptor lamellar 14 corresponding to the electrostatic latent image of four kinds of colors (yellow, magenta, cyan and black).In addition, need synchronous detection unit 34 to control the independent scan operation of each laser scan unit 30, wherein synchronous detection unit 34 coupling is scanned up to the synchronism between the motor driver 37 of light and 36 rotations of control motor on the photoreceptor conveying belt 14 along main scanning direction M.Synchronous detection unit 34 and motor driver 37 are together by system control unit 35 controls.
Have as mentioned above at imaging device under the situation of four laser scan units 30, it is big that the size of imaging device must become.Therefore, this big imaging device is difficult to satisfy the trend of recent demand small, light device.In addition, because each laser scan unit 30 has lens unit 33 and motor driver 37, thereby the component costs of laser scan unit 30 and its assembly cost also increase.In addition, because the departure of each motor 36 may produce the color registration error.
In order to address the above problem, as shown in Figure 3, proposed a plurality of catoptrons 43 are installed in four laser scan units 30, make a plurality of photo-generators 42 light is emitted on the rotatable mirror polygon 41, and the light that is sent is scanned up on the photoreceptor medium 44 respectively through different light paths at different directions.
Yet, because must be with catoptron 43 in the method for above-mentioned proposition, catoptron 43 must be provided with to such an extent that can not stop the light path of the light that photo-generator 42 sends.Therefore, for satisfy simultaneously again in the small space that catoptron 43 is installed in four laser scan units 30 above-mentioned condition be have circumscribed.As a result, the size of imaging device must increase.In addition, exist in light path under the situation of angle error when catoptron 43 is installed, compare with the angle error of the setting angle of catoptron 43, it is its twice that light path departs from, and causes the color registration error of coloured image thus.Thereby, need the plenty of time accurately to assemble and accommodation reflex mirror 43, increase its assembly cost thus.
Summary of the invention
The invention provides a kind of improved laser scan unit, it can be integrated into a plurality of laser scan units in the monomer forming coloured image, and a kind of electrophotographic imaging forming apparatus that adopts this laser scan unit is provided.
Other aspects of the present invention and advantage part are hereinafter set forth, and will be from instructions part apparent or can be to understand by the practice of the present invention.
According to an aspect of the present invention, the laser scan unit that is used for electrophotographic imaging forming apparatus comprises: a plurality of light-sensitive mediums; Driver element with rotating shaft; A plurality of photo-generators that send directional light (light or laser beam); A plurality of rotatable mirror polygons, the light beam that its deflection (reflection) photo-generator sends along main scanning direction with predetermined angular range so that with photoscanning on corresponding of the light-sensitive medium of advance on the sub scanning direction (moving); A plurality of rotatable mirror polygons, they are stacked on the driver element, with corresponding photo-generator coupling and with the rotating shaft coupling of driver element, rotate thereupon; A plurality of first lens, they are installed in respectively on the light path of the light between photo-generator and the rotatable mirror polygon, and assemble the light on the sub scanning direction; And a plurality of second lens, they with the optical convergence of rotatable mirror polygon deflection on light-sensitive medium.
In laser scan unit, a plurality of first lens and a plurality of second lens can be integrated into a monomer respectively.And the reflecting surface of rotatable mirror polygon can tilt with respect to sub scanning direction.
According to a further aspect in the invention, electrophotographic imaging forming apparatus comprises: light-sensitive medium; Laser scan unit, its with photoscanning to the light-sensitive medium to form electrostatic latent image; A plurality of developing cells, its with the toner supply electrostatic latent image to form toner image; Transfer printing unit, it is transferred to toner image on one page printer paper; And fixation unit, its with toner image on printer paper.
Laser scan unit comprises: a plurality of photo-generators that send directional light; A plurality of rotatable mirror polygons, the light beam in predetermined angular range that its deflection electric signal generator sends along main scanning direction, with beam flying on the light-sensitive medium of (moving) of advancing on the sub scanning direction, rotatable mirror polygon is stacked on the driver element, with mate corresponding photo-generator and with the rotating shaft of driver element coupling, rotate thereupon; A plurality of first lens, they are installed in respectively on the light path of the light between photo-generator and the rotatable mirror polygon, and assemble the light on the sub scanning direction; And a plurality of second lens, they with the optical convergence of rotatable mirror polygon deflection on corresponding of light-sensitive medium.
In electrophotographic imaging forming apparatus, light-sensitive medium can comprise the photosensitive drums identical with photo-generator quantity.In addition, light-sensitive medium can comprise along the photoreceptor lamellar of ring-type (sealing) path circular flow.
Description of drawings
From the detailed description of preferred embodiments below in conjunction with accompanying drawing, these and/or other aspect of the present invention and advantage will become apparent and easy to understand more, in the accompanying drawing:
Fig. 1 is the cut-open view of traditional color electrophotographic image forming apparatus;
Fig. 2 is a skeleton view, and the example of the conventional laser scanning element of traditional color electrophotographic image forming apparatus shown in Figure 1 is shown;
Fig. 3 is a cut-open view, and another example of the conventional laser scanning element of traditional color electrophotographic image forming apparatus shown in Figure 1 is shown;
Fig. 4 is a cut-open view, and the electrophotographic imaging forming apparatus according to the embodiment of the invention is shown;
Fig. 5 illustrates the cut-open view of another electrophotographic imaging forming apparatus according to another embodiment of the present invention;
Fig. 6 is a skeleton view, and the example of laser scan unit used in the electrophotographic imaging forming apparatus of Figure 4 and 5 is shown;
Fig. 7 and 8 is the laser scan unit imaging views on main scanning direction and sub scanning direction by Fig. 6;
Fig. 9 is a skeleton view, and another example of laser scan unit used in the electrophotographic imaging forming apparatus of Figure 4 and 5 is shown; And
Figure 10 is a skeleton view, and the 3rd example of laser scan unit used in the electrophotographic imaging forming apparatus of Figure 4 and 5 is shown.
Embodiment
Describe currently preferred embodiment of the present invention now in detail, its example is shown in the drawings, and wherein identical Reference numeral identifies components identical from start to finish.By describing embodiment with reference to the accompanying drawings is in order to explain the present invention.
The embodiment that describes below relates to laser scan unit, and it is restrainted light (four light beams or four laser beam) by emission corresponding to four of four kinds of colors (black (K), cyan (C), magenta (M), yellow (W)) and forms coloured image.
Fig. 4 is the cut-open view that illustrates according to first embodiment of electrophotographic imaging forming apparatus of the present invention.
As shown in Figure 4, imaging device comprises: laser scan unit 210, four photosensitive drums 220 (220-Y, 220-M, 220-C and 220-K), four developing cell 230 (230-Y, 230-M, 230-C and 230-K), transfer printing unit and fixation unit 260 with transfer belt 240.Laser scan unit 210 is scanned up to light (light beam or laser beam) by uniform charging corresponding to four photosensitive drums 220 of predetermined electrostatic potential respectively and goes up to form electrostatic latent image.The toner of four kinds of colors of four developing cell 230 usefulness (that is, black (K), cyan (C), magenta (M) and yellow (W)) developing electrostatic latent image forms toner image.The toner image of four kinds of color toners in being formed on four photosensitive drums 220 on corresponding is transferred to transfer belt 240, forms to superpose successively after the full-colour image, and transfer belt 240 is transferred to toner image (full-colour image) on one page printer paper S.Toner image transfer printing printer paper S is thereon also pushed in fixation unit 260 heating, with toner image on printer paper S.Usually, provide the input tray 250 of printer paper S to be placed in the main body of imaging device.
In said structure, the formation of coloured image is following to be carried out.At first, if four photosensitive drums 220 are by the extremely predetermined electrostatic potential of charging device (not shown) uniform charging, then on to photosensitive drums 220 corresponding one of a branch of in laser scan unit 210 scanning light beams, first electrostatic latent image that formation will be developed corresponding to first kind of color.For example,, be formed on first electrostatic latent image on the photosensitive drums 220Y with yellow (Y) toner development, form yellow (Y) image thus corresponding to yellow (Y) corresponding to the developing cell 230Y of yellow (Y) if determine that yellow (Y) is first kind of color.So yellow (Y) image that forms then is transferred on the transfer belt 240 from photosensitive drums 220Y.
Second electrostatic latent image corresponding to second kind of color that then, will develop forms by the charging device and the laser scan unit 210 of charging and another photosensitive drums 220 of exposing respectively.For example, if determine that magenta (M) is second kind of color, then be formed on second electrostatic latent image on the photosensitive drums 220M with magenta (M) toner development, thereby form magenta (M) image corresponding to magenta (M) corresponding to the developing cell 230M of magenta (M).Magenta (M) image on being transferred to it transfer printing during the transfer belt 240 of yellow (Y) image with yellow (Y) image overlay.At this moment, the rotation of the exposure of laser scan unit 210, photosensitive drums 220 and the translational speed of transfer belt 240 are precisely controlled, feasible yellow (Y) image and magenta (M) image overlay and accurately transfer printing.
Utilize said method, make as the third color cyan (C) image and as black (K) image developing of the 4th kind of color and transfer printing successively, thus, full-colour image is formed on the A place, position of transfer belt shown in Figure 4 240.Full-colour image is transferred on the printer paper S, and printer paper S supplies between transfer belt 240 and the transfer printing backing roll 241 from input tray 250, and printer paper S makes the complete photographic fixing of full-colour image on printer paper S being heated when the fixation unit 260 and pressurized.
Although in this embodiment shown in Figure 4, four photosensitive drums 220Y, 220M, 220C and 220K are as light-sensitive medium, and transfer belt 240 is as transfer printing unit, but also can be as shown in Figure 5, be used as light-sensitive medium along ring-type (sealing) path round-robin photoreceptor lamellar 270, and transfer roll 280 is as transfer printing unit, according to another embodiment of the present invention another imaging device shown in Fig. 5.In the imaging process of above-mentioned Fig. 5, the toner image of four kinds of colors, for example, the toner image of yellow (Y), magenta (M), cyan (C) and black (K) is sequentially superposeed with this order by developing cell 230, form full-colour image, Die Jia color toner image (full-colour image) is formed on the photoreceptor lamellar 270 then.Then, the color toner image is sent on the printer paper S, and this printer paper S provides between photoreceptor lamellar 270 and transfer roll 280, and photographic fixing are finished color print image thus on printer paper S after process fixation unit 260 then.
Electrophotographic imaging forming apparatus according to the present invention is characterised in that: laser scan unit 210 has a plurality of rotatable mirror polygon that is only rotated by a drive motor, and this feature is different with the traditional imaging device that comprises four laser scan units.
Fig. 6 is the skeleton view of the example of the laser scan unit 210 that adopted in the electrophotographic imaging forming apparatus of Figure 4 and 5.Fig. 7 and 8 is the laser scan unit 210 imaging views on main scanning direction and sub scanning direction that illustrate by Fig. 6.Main scanning direction is represented the direction of every bundle photoscanning on the corresponding photosensitive drums 220, and sub scanning direction is represented the direction that light is arranged or is formed on the direction that is provided with of sweep trace on each photosensitive drums 220.
Laser scan unit shown in Figure 6 comprises: the photo-generator 110 that sends directional light (light beam or laser beam); First lens 120, it collects the light on the sub scanning direction; Rotatable mirror polygon 130, the light on its deflection main scanning direction; And second lens 140, it will be by the optical convergence of rotatable mirror polygon 130 deflections on the surface of light-sensitive medium (that is scanned object).Photo-generator 110, first lens 120, rotatable mirror polygon 130 and second lens, 140 quantity are four, correspond respectively to these four kinds of colors of yellow (Y), magenta (M), cyan (C) and black (K), and be arranged on the sub scanning direction.Among the embodiment shown in Figure 6, photosensitive drums 220 is as light-sensitive medium.
Each photo-generator 110 all comprises light source 111 and collimation lens 112.Launch monochromatic laser diode usually as light source 111.Because from the only diverging light (light beam or laser beam) that light source 111 sends, diverging light is through becoming directional light (light beam or laser beam) after the collimation lens 112.Shown in Fig. 7 and 8, as first lens 120, the directional light that makes photo-generator 110 send is focused on the sub scanning direction and incides on the rotatable mirror polygon 130 cylindrical lens usually.
Four rotatable mirror polygons 130 pile up along the rotating shaft of drive motor 150 on sub scanning direction.Therefore, when drive motor 150 rotated, four rotatable mirror polygons 130 rotated simultaneously.Usually, on each rotatable mirror polygon 130, form at least one reflecting surface.In the embodiment shown in fig. 6, on each rotatable mirror polygon 130, form six reflecting surfaces.Along with rotatable mirror polygon 130 rotates, the angle that incides from photoreceptor 110 between the reflecting surface of light on the reflecting surface of rotatable mirror polygon 130 and rotatable mirror polygon 130 changes continuously, makes and advances at the main scanning direction upper deflecting and towards photosensitive drums 220 from the light of rotatable mirror polygon 130 reflections.As mentioned above, because these four rotatable mirror polygons 130 are only rotated by a drive motor 150, laser scan unit 210 according to the present invention can have only a motor driver (not shown), and this is different from the conventional laser scanning element with four motor drivers that are used to drive four drive motor.
Each second lens 140 is installed between photosensitive drums 220 and the rotatable mirror polygon 130.The non-spherical lens that is commonly referred to as f-θ lens is as second lens 140.Second lens 140 make optical convergence by rotatable mirror polygon 130 deflections on the surface of photosensitive drums 220, shown in Fig. 7 and 8.Because the light of rotatable mirror polygon 130 deflections passes second lens 140, no matter deflection angle theta how, the light that is deflected forms image (sweep trace) on the photosensitive drums 220 that is positioned at the focal distance f place.
The synchronism that synchronous detection unit 160 detects between the light that is scanned up on the main scanning direction on the photosensitive drums 220 is respectively restrainted the instant moment that photoscanning begins with definite.That is, after synchronous detection unit 160 detects light and preset time disappearance, begin to scan light, make that light can be able to accurate scanning when the beginning scan light corresponding to picture information.Four synchronous detection units 160 can be installed, but be assembled at the reflecting surface of the rotatable mirror polygon 130 of laser scan unit and accurately determining under the situation of (identify) (arrangement) synchronous detection unit only being installed on the sub scanning direction.
Fig. 9 is the skeleton view of another example of the laser scan unit 210 shown in the Figure 4 and 5.
According to the example of the laser scan unit shown in Fig. 6 and 9, the directional light that photo-generator 110 sends is arranged in sub scanning direction by first lens 120 or 120 ' be converged to, and makes directional light be incident on the corresponding rotatable mirror polygon 130.Along with rotatable mirror polygon 130 rotates, has the main scanning direction upper deflecting of predetermined angular range from the light of the reflecting surface reflection of rotatable mirror polygon 130.Then, the light that is deflected makes the photoscanning of being assembled to the respective surfaces of photosensitive drums 220 by second lens 140 or 140 ' be converged on sub scanning direction and main scanning direction and arrange.
Toner image corresponding to four kinds of colors accurately overlaps to form coloured image.It is called color registration.Space (at interval) the L1 (see figure 6) that is incident between the light on the light-sensitive medium can be the integral multiple of the resolution of coloured image, easily to carry out color registration.That is, shown in Figure 4 and 5, being formed on Space L 1 between the main scanning line on photosensitive drums 220 or the photoreceptor lamellar 270 by corresponding light can be the enamel integral multiple of resolution of image of sub scanning direction.Therefore, because each element of imaging device is controlled, the integral multiple of the resolution when being the control imaging device is so carry out color registration easily.As shown in Figure 6, rotatable mirror polygon 130 has corresponding to the space of inciding the light on the photosensitive drums 220 (at interval) L1 or corresponding to another space (at interval) L2 of the distance between the light path of the light of laser scan unit 210.
And in imaging device shown in Figure 4, wherein photosensitive drums 220 is as light-sensitive medium, if the space that is incident between the light on the photosensitive drums 220 is the integral multiple of the girth of photosensitive drums 220, then carries out color registration easily.For example, in photoscanning to photosensitive drums 220Y so that after the photosensitive drums 220Y rotation once, light begins to be scanned up on the photosensitive drums 220Y, thereby yellow toner image and magenta toner image are accurately overlapping, and overlapping toner image is transferred on the photoreceptor lamellar 240, determined color registration thus.
Imaging device with cramped construction very can embody by adopting laser scan unit 210 according to the present invention, makes the size of photosensitive drums less, for example, and 20mm or littler, and light is incided on the light-sensitive medium by the space between the developing cell.
Figure 10 is the skeleton view of another example of laser scan unit 210.
With reference to Figure 10, four rotatable mirror polygons 130 ' each reflecting surface 131,132,133 and 134 form to such an extent that tilt with respect to sub scanning direction.Each reflecting surface 131,132,133 and 134 can form to such an extent that have different angles A1, A2, A3 and A4 with respect to the line with the sub scanning direction correspondence.Angle A 1 can equal angle A 4, and angle A 2 can equal angle A 3.Also can in each reflecting surface 131,132,133 and 134, make various variations.By four rotatable mirror polygons 130 ' this structure, because pitch angle A1 and A2 and pitch angle A3 and A4 are formed on different directions as shown in figure 10, light via four rotatable mirror polygons 130 ' in a corresponding twice with pitch angle A1, A2, A3 and A4 not only at the main scanning direction upper deflecting but also at the sub scanning direction upper deflecting.Thereby, when the space between the main scanning line on being formed on light- sensitive medium 220 or 270 keeps constant by regulating pitch angle A1, A2, A3 and A4, be installed in four rotatable mirror polygons 130 on the drive motor 150 ' overall height can reduce, make four rotatable mirror polygons 130 ' can smooth rotation.
As mentioned above, according to laser scan unit of the present invention and adopt the imaging device of this laser scan unit to have following advantage.
At first, because rotatable mirror polygon is arranged on the drive motor, be arranged on conventional laser scanning element on a plurality of drive motor than rotatable mirror polygon, component costs can reduce.
The second, because first convergent lens and second convergent lens are integrated into a monomer respectively, and only need a synchronous detection unit, so can reduce the manufacturing cost and the assembly cost of parts.
The 3rd, because rotatable mirror polygon is arranged on the drive motor, the color registration error that departure produced of each drive motor in the conventional laser scanning element can not take place in laser scan unit of the present invention.
The 4th, because laser scan unit is integrated into a monomer, the size of imaging device can reduce.
Although the present invention is specifically illustrated and is described with reference to its preferred embodiment, but it will be appreciated by those skilled in the art that, under the prerequisite of thought of the present invention that does not break away from appended claims and the qualification of its equivalent and scope, can carry out the various variations on form and the details.
Claims (40)
1. laser scan unit that is used for electrophotographic imaging forming apparatus comprises:
A plurality of light-sensitive mediums;
Driver element with rotating shaft;
A plurality of photo-generators that send parallel beam;
A plurality of rotatable mirror polygons, the light beam that its deflection is sent at main scanning direction from photo-generator with predetermined angular range, with with beam flying on corresponding of the light-sensitive medium of advancing on the sub scanning direction, rotatable mirror polygon is stacked on the driver element, with the corresponding coupling of photo-generator and with the rotating shaft of driver element coupling, rotate thereupon;
A plurality of first lens, they are installed in respectively on the light path of the light beam between photo-generator and the rotatable mirror polygon, and assemble the light beam on the sub scanning direction; And
A plurality of second lens, they will be focused at by a corresponding light beams deflected of rotatable mirror polygon on the light-sensitive medium corresponding one.
2. laser scan unit as claimed in claim 1, wherein first lens are integrated into a monomer.
3. laser scan unit as claimed in claim 1, wherein second lens are integrated into a monomer.
4. laser scan unit as claimed in claim 1, wherein rotatable mirror polygon comprises:
The reflecting surface that tilts at sub scanning direction.
5. electrophotographic imaging forming apparatus comprises:
Light-sensitive medium;
Laser scan unit, its with beam flying to the light-sensitive medium to form a plurality of electrostatic latent images;
A plurality of developing cells, it is with the toner supply electrostatic latent image, to form toner image on light-sensitive medium;
Transfer printing unit, it is transferred to toner image on one page printer paper, forms coloured image; With
Fixation unit, its with toner image on printer paper,
Wherein laser scan unit comprises:
Driver element with rotating shaft;
Send a plurality of photo-generators of light beam parallel to each other;
A plurality of rotatable mirror polygons, the light beam in predetermined angular range that its deflection electric signal generator is sending on the main scanning direction, with beam flying on the light-sensitive medium of advancing on the sub scanning direction, rotatable mirror polygon is stacked on the driver element, with with the corresponding coupling of photo-generator and with the rotating shaft of driver element coupling, rotate thereupon;
A plurality of first lens, they are installed in respectively on the light path of the light beam between photo-generator and the rotatable mirror polygon, and assemble the light on the sub scanning direction; And
A plurality of second lens, they are focused at rotatable mirror polygon light beams deflected on the light-sensitive medium.
6. electrophotographic imaging forming apparatus as claimed in claim 5, wherein first lens are integrated into a monomer.
7. electrophotographic imaging forming apparatus as claimed in claim 5, wherein second lens are integrated into a monomer.
8. electrophotographic imaging forming apparatus as claimed in claim 5, wherein rotatable mirror polygon comprises: the reflecting surface that tilts at sub scanning direction.
9. electrophotographic imaging forming apparatus as claimed in claim 5, wherein light-sensitive medium comprises:
The photosensitive drums identical with photo-generator quantity.
10. electrophotographic imaging forming apparatus as claimed in claim 9 wherein, form a space between the light beam that is scanned up to along sub scanning direction on the photosensitive drums, and the size in this space is the integral multiple of the girth of photosensitive drums.
11. electrophotographic imaging forming apparatus as claimed in claim 9 wherein, form a space between the light beam that is scanned up to along sub scanning direction on the photosensitive drums, and the size in this space is the integral multiple of the resolution of the coloured image on the photosensitive drums sub scanning direction.
12. electrophotographic imaging forming apparatus as claimed in claim 5, wherein light-sensitive medium comprises:
Photoreceptor lamellar along cyclic path circular flow.
13. electrophotographic imaging forming apparatus as claimed in claim 12, wherein, between the light beam that is scanned up to along sub scanning direction by photo-generator on the photoreceptor lamellar, form a space, and the size in this space is the integral multiple of the resolution of the coloured image of photoreceptor lamellar on sub scanning direction.
14. a laser scan unit that is used for electrophotographic imaging forming apparatus comprises:
A plurality of photo-generators, they are separately positioned on the sub scanning direction, so that along launching multi-beams in a plurality of light paths that are arranged on the sub scanning direction;
A plurality of rotatable mirror polygons, it is arranged on the sub scanning direction, to rotate around the common axis that is parallel to sub scanning direction, and the light beam that sends from photo-generator along each light path on the main scanning direction of deflection respectively, each main scanning direction and sub scanning direction are angled, and are formed on the multi-strip scanning line that separates each other on the sub scanning direction.
15. laser scan unit as claimed in claim 14, wherein photo-generator comprises:
A plurality of light sources are arranged on the sub scanning direction, with the emission light beam; With
A plurality of collimation lenses are arranged on corresponding of a plurality of light paths on the sub scanning direction, on sub scanning direction light beam are transformed into parallel beam.
16. laser scan unit as claimed in claim 14 also comprises:
A plurality of lens, they are arranged on corresponding of a plurality of light paths between photo-generator and the rotatable mirror polygon, so that assemble the light beam on the sub scanning direction.
17. laser scan unit as claimed in claim 16, wherein lens are formed by the monomer of monolithic.
18. laser scan unit as claimed in claim 14 also comprises:
Be arranged in the light-sensitive medium that sub scanning direction moves; With
Be arranged on a plurality of lens between light-sensitive medium and the rotatable mirror polygon, will be focused on the light-sensitive medium, to form sweep trace by a corresponding light beams deflected of a plurality of rotatable mirror polygons.
19. laser scan unit as claimed in claim 14 also comprises:
A plurality of first lens, it is installed on corresponding of a plurality of light paths between photo-generator and the rotatable mirror polygon, to assemble the light beam on the sub scanning direction; With
A plurality of second lens, it is arranged to assemble the corresponding light beam at sub scanning direction and corresponding main scanning direction upper deflecting by a plurality of rotatable mirror polygons, to form sweep trace.
20. laser scan unit as claimed in claim 19, wherein, first lens are formed by the monomer of monolithic, and second lens are formed by the monomer of another monolithic.
21. laser scan unit as claimed in claim 14 also comprises:
Have the driver element of rotating shaft, rotating shaft has common axis, and wherein rotatable mirror polygon is coupled in the rotating shaft of driver element, to rotate around this rotating shaft.
22. laser scan unit as claimed in claim 14, wherein each rotatable mirror polygon comprises:
Reflecting surface at grade is set, on this plane, is provided with a corresponding light path.
23. laser scan unit as claimed in claim 14, wherein, each rotatable mirror polygon comprises:
Reflecting surface has the angle with respect to sub scanning direction, so that guide corresponding light beam on sub scanning direction and corresponding main scanning direction.
24. laser scan unit as claimed in claim 23, wherein:
Light beam comprises,
The first, second, third and the 4th light beam; And
Reflecting surface comprises,
The first, second, third and the 4th reflecting surface, they have the first, second, third and the 4th angle with respect to the line corresponding with sub scanning direction respectively.
25. laser scan unit as claimed in claim 24, wherein, first and second angles of first and second reflecting surfaces form at first direction upper deflecting first and second light beams, and third and fourth angle of third and fourth reflecting surface forms at second direction upper deflecting third and fourth light beam.
26. laser scan unit as claimed in claim 25, wherein, first and second directions with respect to perpendicular to common axis and subscan line one of them line and be oppositely arranged.
27. laser scan unit as claimed in claim 24, wherein, the first and the 4th angle has first value, and second and the third angle degree have second value.
28. laser scan unit as claimed in claim 14, wherein rotatable mirror polygon comprises:
The reflecting surface that has different angles with sub scanning direction.
29. laser scan unit as claimed in claim 14, wherein rotatable mirror polygon comprises:
Corresponding to the reflecting surface of each light path, with the corresponding light beam of guiding on corresponding main scanning direction and sub scanning direction.
30. laser scan unit as claimed in claim 14, wherein, rotatable mirror polygon is formed by the monomer of monolithic.
31. an electrophotographic imaging forming apparatus comprises:
Light-sensitive medium;
Produce the laser scan unit of light beam, so that beam flying is formed a plurality of electrostatic latent images to light-sensitive medium and on light-sensitive medium;
A plurality of developing cells, it provides toner to electrostatic latent image, to form toner image on light-sensitive medium;
Transfer printing unit, it is transferred to toner image on one page printer paper, forms coloured image; With
Fixation unit, its with toner image on printer paper,
Wherein laser scan unit comprises:
Be arranged on the sub scanning direction to send a plurality of photo-generators of a plurality of light beams along a plurality of light paths that on sub scanning direction, are provided with; And
A plurality of rotatable mirror polygons, it is arranged on the sub scanning direction, and around the common axis rotation that is parallel to sub scanning direction, and the light beam that sends along each light path from photo-generator along each main scanning direction deflection, each main scanning direction and sub scanning direction are angled, to form the multi-strip scanning line that separates each other along sub scanning direction on light-sensitive medium.
32. electrophotographic imaging forming apparatus as claimed in claim 31, wherein light-sensitive medium comprises:
A plurality of photosensitive drums, it is arranged on the sub scanning direction, with corresponding with each rotatable mirror polygon and each photo-generator.
33. electrophotographic imaging forming apparatus as claimed in claim 31, wherein laser scan unit comprises:
Rotate the single motor of rotatable mirror polygon.
34. electrophotographic imaging forming apparatus as claimed in claim 33, wherein, single motor comprises:
Rotating shaft, it is arranged on the common axis, with rotatable mirror polygon coupling.
35. electrophotographic imaging forming apparatus as claimed in claim 33, wherein, rotatable mirror polygon is formed by the monomer that is coupled to the monolithic in the rotating shaft.
36. electrophotographic imaging forming apparatus as claimed in claim 33 also comprises:
Synchronous detection unit, it detects the part of light beam, with the control single motor.
37. electrophotographic imaging forming apparatus as claimed in claim 33, wherein, each rotatable mirror polygon comprises:
Reflecting surface, it is arranged on the corresponding light path, reflecting corresponding light beam, thereby forms corresponding sweep trace on the relevant position of light-sensitive medium.
38. an electrophotographic imaging forming apparatus comprises:
Light-sensitive medium;
Produce the light source of light beam, so that light beam is scanned up on the light-sensitive medium along light path, thereby on light-sensitive medium, form a plurality of electrostatic latent images;
A plurality of rotatable mirror polygons, it corresponds respectively in the light beam corresponding one, light beam is guided towards light-sensitive medium, thereby form a corresponding electrostatic latent image on light-sensitive medium;
First lens are arranged between light source and the rotatable mirror polygon, and have the cylindrical lens that is formed on the part that light beam sees through; And
Second lens are arranged between rotatable mirror polygon and the light-sensitive medium, and have the f-θ lens that are formed on the part that light beam sees through.
39. electrophotographic imaging forming apparatus as claimed in claim 38, wherein, first lens comprise the non-cylindrical lens that is formed on other parts that light beam do not see through, and a plurality of secondary first lens, described secondary first lens are corresponding to each light beam and have cylindrical lens and wherein corresponding one of non-cylindrical lens; Second lens comprise the non-f-θ lens that are formed on other parts that light beam do not see through, and wherein cylindrical lens and non-cylindrical lens form the monomer of monolithic.
40. electrophotographic imaging forming apparatus as claimed in claim 39, wherein, first lens comprise a plurality of secondary second lens, described secondary second lens corresponding to each light beam and have f-θ lens and non-f-θ lens in corresponding one, and cylindrical lens and non-cylindrical lens form the monomer of monolithic.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR56225/02 | 2002-09-16 | ||
| KR1020020056225A KR100565051B1 (en) | 2002-09-16 | 2002-09-16 | Scanning unit and electrophotographic image forming system |
| KR56225/2002 | 2002-09-16 | ||
| US10/420,001 | 2003-04-22 | ||
| US10/420,001 US6839156B2 (en) | 2002-09-16 | 2003-04-22 | Laser scanning unit and electrophotographic image forming apparatus adopting the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1495561A true CN1495561A (en) | 2004-05-12 |
| CN1300646C CN1300646C (en) | 2007-02-14 |
Family
ID=32301912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031581854A Expired - Fee Related CN1300646C (en) | 2002-09-16 | 2003-09-16 | Laser scanning unit and electronic photographic imaging device using the same |
Country Status (2)
| Country | Link |
|---|---|
| JP (2) | JP3974565B2 (en) |
| CN (1) | CN1300646C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373212C (en) * | 2005-03-15 | 2008-03-05 | 佳能株式会社 | Scanning optical device and color image forming apparatus using the same |
| CN100403179C (en) * | 2004-07-21 | 2008-07-16 | 佳能株式会社 | Image forming apparatus having a plurality of laser scanner units |
| CN102180024A (en) * | 2011-01-12 | 2011-09-14 | 刘彬 | Method for implementing printing on photosensitive paper by using 200-480nano laser |
| CN102749705A (en) * | 2012-07-27 | 2012-10-24 | 无锡迈福光学科技有限公司 | High-speed scanning device and high-speed scanning mirror assembly thereof |
| CN103135225A (en) * | 2011-11-29 | 2013-06-05 | 宏瞻科技股份有限公司 | Scanning galvanometer component |
| CN103269864A (en) * | 2010-12-30 | 2013-08-28 | 奥迪克激光应用技术股份有限公司 | Marking apparatus and method for operating a marking apparatus |
| CN104067109A (en) * | 2012-01-24 | 2014-09-24 | 陶朗分选有限公司 | Apparatus, system and method for detecting matter |
| WO2023246383A1 (en) * | 2022-06-24 | 2023-12-28 | 亿信科技发展有限公司 | Imaging device and imaging method thereof, and printer |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006126646A (en) * | 2004-10-29 | 2006-05-18 | Canon Inc | Image forming apparatus |
| JP2006184563A (en) * | 2004-12-27 | 2006-07-13 | Ricoh Co Ltd | Light deflector, optical scanner and image forming apparatus |
| JP4991241B2 (en) * | 2006-10-18 | 2012-08-01 | 株式会社リコー | Optical scanning apparatus and image forming apparatus |
| JP5375127B2 (en) * | 2008-02-28 | 2013-12-25 | 株式会社リコー | Exposure apparatus, image forming apparatus, and image forming method |
| CN107850774B (en) * | 2015-07-30 | 2021-03-26 | 京瓷办公信息系统株式会社 | Optical scanning device and image forming apparatus |
| RU205659U1 (en) * | 2021-05-18 | 2021-07-26 | Михаил Геннадьевич Даниловских | Laser scanning device for processing vegetative plants |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5291223A (en) * | 1991-09-19 | 1994-03-01 | Konica Corporation | Exposure unit for a multicolor image forming apparatus capable of better registration of the multicolor images |
| JP3124741B2 (en) * | 1996-07-22 | 2001-01-15 | 株式会社リコー | Optical scanning device for multicolor image forming apparatus |
| JPH1178113A (en) * | 1997-09-11 | 1999-03-23 | Nec Niigata Ltd | Laser scan optical unit and method for scanning laser light |
| JPH11227249A (en) * | 1998-02-16 | 1999-08-24 | Ricoh Co Ltd | Image forming apparatus |
| JP2000263848A (en) * | 1999-03-16 | 2000-09-26 | Canon Inc | Image-forming apparatus |
-
2003
- 2003-09-16 JP JP2003323020A patent/JP3974565B2/en not_active Expired - Fee Related
- 2003-09-16 CN CNB031581854A patent/CN1300646C/en not_active Expired - Fee Related
-
2007
- 2007-02-21 JP JP2007041348A patent/JP2007206705A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100403179C (en) * | 2004-07-21 | 2008-07-16 | 佳能株式会社 | Image forming apparatus having a plurality of laser scanner units |
| CN100373212C (en) * | 2005-03-15 | 2008-03-05 | 佳能株式会社 | Scanning optical device and color image forming apparatus using the same |
| CN103269864B (en) * | 2010-12-30 | 2015-06-24 | 奥迪克激光应用技术股份有限公司 | Marking apparatus and method for operating a marking apparatus |
| CN103269864A (en) * | 2010-12-30 | 2013-08-28 | 奥迪克激光应用技术股份有限公司 | Marking apparatus and method for operating a marking apparatus |
| CN102180024A (en) * | 2011-01-12 | 2011-09-14 | 刘彬 | Method for implementing printing on photosensitive paper by using 200-480nano laser |
| CN103135225B (en) * | 2011-11-29 | 2015-01-14 | 宏瞻科技股份有限公司 | Scanning galvanometer component |
| CN103135225A (en) * | 2011-11-29 | 2013-06-05 | 宏瞻科技股份有限公司 | Scanning galvanometer component |
| CN104067109A (en) * | 2012-01-24 | 2014-09-24 | 陶朗分选有限公司 | Apparatus, system and method for detecting matter |
| US9557265B2 (en) | 2012-01-24 | 2017-01-31 | Tomra Sotring As | Apparatus, system and method for detecting matter |
| CN104067109B (en) * | 2012-01-24 | 2017-03-22 | 陶朗分选有限公司 | Apparatus, system and method for detecting matter |
| CN102749705B (en) * | 2012-07-27 | 2015-02-04 | 无锡迈福光学科技有限公司 | High-speed scanning device and high-speed scanning mirror assembly thereof |
| CN102749705A (en) * | 2012-07-27 | 2012-10-24 | 无锡迈福光学科技有限公司 | High-speed scanning device and high-speed scanning mirror assembly thereof |
| WO2023246383A1 (en) * | 2022-06-24 | 2023-12-28 | 亿信科技发展有限公司 | Imaging device and imaging method thereof, and printer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007206705A (en) | 2007-08-16 |
| JP3974565B2 (en) | 2007-09-12 |
| CN1300646C (en) | 2007-02-14 |
| JP2004110033A (en) | 2004-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1300646C (en) | Laser scanning unit and electronic photographic imaging device using the same | |
| JP4922118B2 (en) | Optical scanning apparatus and image forming apparatus | |
| CN103376550B (en) | Image forming apparatus | |
| CN101169514B (en) | Scanning optical apparatus and image forming apparatus provided therewith | |
| US20080267662A1 (en) | Light scanning device and image forming apparatus | |
| KR101747301B1 (en) | Light scanning unit and electrophotograpohic image forming apparatus using the same | |
| JP2010256397A (en) | Optical scanning apparatus and image forming apparatus with the same | |
| JP2008203760A (en) | Optical scanner and image forming apparatus | |
| EP1724625B1 (en) | Optical scanning unit and image forming apparatus | |
| US6839156B2 (en) | Laser scanning unit and electrophotographic image forming apparatus adopting the same | |
| CN100454081C (en) | Optical scanning device and image forming apparatus | |
| US7639273B2 (en) | Image forming apparatus | |
| CN101131476A (en) | Optical scanner used in color image-forming device | |
| US6559998B2 (en) | Optical scanning apparatus | |
| US7518771B2 (en) | Optical scanning device and image forming apparatus equipped with the same | |
| EP2455817B1 (en) | Light scanning unit and electrophotographic image forming apparatus using the same | |
| JP5712709B2 (en) | Optical scanning apparatus and image forming apparatus | |
| JP2000180778A (en) | Light beam scanner | |
| US20020131136A1 (en) | Method and apparatus for image forming with dual optical scanning systems | |
| JP2013160971A (en) | Optical scanner and image forming device | |
| EP3362856B1 (en) | Light scanning unit and image forming apparatus having the same | |
| US20110222883A1 (en) | Image forming apparatus | |
| JP2012018337A (en) | Light scanning device and image forming device | |
| JP2006015651A (en) | Image forming apparatus | |
| JPH11133338A (en) | Multibeam optical device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170330 Address after: Gyeonggi Do, South Korea Patentee after: Aisi Printing Solutions Co.,Ltd. Address before: Gyeonggi Do, South Korea Patentee before: Samsung Electronics Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Gyeonggi Do, South Korea Patentee after: S-PRINTING SOLUTION Co.,Ltd. Address before: Gyeonggi Do, South Korea Patentee before: Aisi Printing Solutions Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191031 Address after: Texas, USA Patentee after: HEWLETT-PACKARD DEVELOPMENT Co.,L.P. Address before: Han Guojingjidao Patentee before: S-PRINTING SOLUTION Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070214 Termination date: 20210916 |